阅读说明：本技术 一种群体决策方法和装置 (Group decision method and device ) 是由 经小川 华真 杜婉茹 刘萱 于 2021-11-16 设计创作，主要内容包括：提供了一种群体决策方法和装置。所述方法包括：使用区间毕达哥拉斯模糊集IVPFS表征专家对于各方案在各属性下的评估以获得基于区间毕达哥拉斯模糊IVPF的决策矩阵,基于专家集合的子集的λ-模糊测度获得专家集合的广义沙普利Shapley值；基于所述决策矩阵和专家集合的广义Shapley值获得专家群评估；基于专家群评估确定群体层次上的共识程度是否大于预设阈值；响应于确定群体层次上的共识程度大于所述预设阈值,计算属性集的最优模糊测度；基于最优模糊测度计算属性集的广义Shapley值；以及利用计算出的属性集的广义Shapley值,将群评估按照属性集成以获得对各方案的评价。(A group decision method and apparatus are provided. The method comprises the following steps: using an interval Pythagorean fuzzy set IVPFS to represent the evaluation of an expert on each scheme under each attribute so as to obtain a decision matrix based on the interval Pythagorean fuzzy IVPF, and obtaining a generalized Shapley value of the expert set based on a lambda-fuzzy measure of a subset of the expert set; obtaining an expert group assessment based on the decision matrix and generalized sharey values of an expert set; determining whether the consensus degree on the group level is greater than a preset threshold value based on expert group evaluation; in response to determining that the degree of consensus on the population level is greater than the preset threshold, calculating the optimal fuzzy measure of the attribute set; calculating a generalized Shapley value of the attribute set based on the optimal fuzzy measure; and integrating the group evaluation by attribute to obtain the evaluation of each scheme by using the calculated generalized sharley value of the attribute set.)

1. A method of group decision comprising:

using an interval Pythagorean fuzzy set IVPFS to represent the evaluation of an expert on each scheme under each attribute so as to obtain a decision matrix based on the interval Pythagorean fuzzy IVPF;

obtaining generalized Shapley values for the expert set based on a lambda-fuzzy measure for a subset of the expert set;

obtaining an expert group assessment based on the decision matrix and generalized sharey values of an expert set;

determining whether the consensus degree on the group level is greater than a preset threshold value based on expert group evaluation;

in response to determining that the degree of consensus on the population level is greater than the preset threshold, calculating the optimal fuzzy measure of the attribute set;

calculating a generalized Shapley value of the attribute set based on the optimal fuzzy measure; and

using the generalized sharley values of the calculated attribute set, the cluster assessments are integrated by attribute to obtain an assessment of each solution.

2. The method of claim 1, wherein,

the generalized Shapley values for a subset of the expert set were calculated by the following formula:

wherein the content of the first and second substances,respectively representing the total number of experts in the expert set and the number of experts in the subset,a lambda-blur measure representing a subset of the set of experts,

wherein the expert group assessment is calculated by the following formula:

wherein the content of the first and second substances,presentation expertFor the schemeAbout attributesThe evaluation of (a) is performed,is thatA sort ofAnd is，The data is an empty set,is thatIn the expert collectionMeasure of blurThe generalized sharley value of (a), wherein,andrespectively representing the lower limit values of the membership degree interval and the non-membership degree interval,andand respectively representing the upper limit values of the membership degree interval and the non-membership degree interval.

3. The method of claim 2, further comprising:

the degree of consensus at the evaluation level was calculated:

wherein；

Calculate consensus on the protocol level:

wherein；

Calculating the consensus degree on the expert level:

wherein；

Calculating the consensus degree on the group level:

wherein the content of the first and second substances,is thatIn thatMeasure of blur on setThe generalized sharley value of (a),is thatIn a manner such thatAnd is，Is an empty set.

4. The method of claim 3, further comprising:

in response to the degree of consensus on the group level not being greater than the preset threshold, modifying the expert assessment with the degree of consensus not greater than the preset threshold;

updating the decision information based on the modified expert assessment; and

the expert group assessment is re-determined based on the updated decision information.

5. The method of claim 4, further comprising:

locating experts with low contribution to group consensus:

；

for elements in the EXPS set, a scheme with a lower degree of location consensus:

；

determining, for elements in the ALS set, that the degree of consensus is not greater than the preset thresholdExpert evaluation of (1):

。

6. the method of claim 5, wherein the step of modifying the expert assessment that the degree of consensus is not greater than the preset threshold comprises:

obtaining an adjustment coefficient based on an optimal modelBased onThe adjustment coefficients are obtained with a modified expert evaluation,

wherein the optimal model takes the maximum value of the population consensus improvement as an objective function,the calculation formula of (a) is as follows:

wherein the content of the first and second substances,andrespectively representing the consensus degree on the group level before the evaluation of the change expert and the consensus degree on the group level after the evaluation of the change expert,

wherein, the modified expert evaluation calculation formula is as follows:。

7. the method of claim 2, wherein the optimal measure of blur for the set of attributes is found by the following formula:

whereinThe evaluation of the population is represented by,andrespectively represent the positive and negative ideal optimal solutions,is to evaluateRelative toNegative approximation coefficient of the ideal solution NIS, whereinIs thatAndthe distance between the two or more of the two or more,is attributeAbout measure of blurThe generalized sharley value of (a),representing known attribute weight information.

8. A group decision device, comprising:

a processor; and the number of the first and second groups,

memory stored with instructions that, when executed by the processor, perform a population decision method according to any one of claims 1-7.

9. A computer-readable storage medium having stored thereon a computer program which, when being executed by a processor, carries out a group decision method according to any one of claims 1-7.

Technical Field

The present application relates to the field of multi-attribute group decision technology, and more particularly, to a group decision method and apparatus.

Background

With the continuous development of economy and technology, the group decision problem related to the comprehensive integration and research of experts becomes more and more complex. Therefore, Multi-attribute group decision-making (MCGDM) has recently become a focus of research, and MCGDM relates to a series of technologies that can effectively support relevant experts to obtain an optimal solution among a set of alternatives through an integrated research process. This process generally involves the following three elements: information expression and fusion; expert Consensus process (CRP); and an alternative ordering method.

Existing information fusion schemes for MCGDM cannot fully reflect, for example, interaction phenomena (e.g., redundancy or collaboration) that are ubiquitous in the expert set and the attribute set, and thus cannot fully analyze the importance of each element.

In addition, the consensus models that lead experts to specify include mainly recognition and orientation rule (IDR) based models and optimization based models with iterative processes. However, the former has a low consensus efficiency due to the requirement of expert to modify opinions, and the latter can significantly improve the consensus efficiency, but the results obtained from only the mathematical model cannot guarantee the expert participation.

Therefore, a multi-group decision method is needed to reflect the interaction phenomena in the expert set and the attribute set as comprehensively as possible and to take into account the consensus efficiency and the expert participation degree.

Disclosure of Invention

The invention aims to provide a group decision method and a group decision device, which can reflect the mutual relation of each element in an expert set attribute set more comprehensively, and simultaneously give consideration to consensus achievement efficiency and expert participation degree so as to improve group consensus to the maximum extent.

According to an aspect of embodiments of the present disclosure, there is provided a group decision method, the method including: using an interval Pythagorean fuzzy set IVPFS to represent the evaluation of an expert on each scheme under each attribute so as to obtain a decision matrix based on the interval Pythagorean fuzzy IVPF, and obtaining a generalized Shapley value of the expert set based on a lambda-fuzzy measure of a subset of the expert set; obtaining an expert group assessment based on the decision matrix and generalized sharey values of an expert set; determining whether the consensus degree on the group level is greater than a preset threshold value based on expert group evaluation; in response to determining that the degree of consensus on the population level is greater than the preset threshold, calculating the optimal fuzzy measure of the attribute set; calculating a generalized Shapley value of the attribute set based on the optimal fuzzy measure; and integrating the group evaluation by attribute to obtain the evaluation of each scheme by using the calculated generalized sharley value of the attribute set.

Optionally, the generalized Shapley values for a subset of the expert set are calculated by the following formula:

wherein the content of the first and second substances,respectively representing the total number of experts in the expert set and the number of experts in the subset,a lambda-blur measure representing a subset of the set of experts,

wherein the expert group assessment is calculated by the following formula:

wherein the content of the first and second substances,presentation expertFor the schemeAbout attributesThe evaluation of (a) is performed,is thatA sort ofAnd is，， Is thatIn the expert collectionMeasure of blurThe generalized sharley value of (a), wherein,andrespectively representing the lower limit values of the membership degree interval and the non-membership degree interval,andindividual watchAnd indicating the upper limit value of the membership degree interval and the non-membership degree interval.

Optionally, the method further comprises:

the degree of consensus at the evaluation level was calculated:

wherein；

Calculate consensus on the protocol level:

wherein；

Calculating the consensus degree on the expert level:

wherein；

Calculating the consensus degree on the group level:

wherein the content of the first and second substances,is thatIn thatMeasure of blur on setThe generalized sharley value of (a),is thatIn a manner such thatAnd is，。

Optionally, the method further comprises:

in response to the degree of consensus on the group level not being greater than the preset threshold, modifying the expert assessment with the degree of consensus not greater than the preset threshold; updating the decision information based on the modified expert assessment; and re-determining the expert group assessment based on the updated decision information.

Optionally, the method further comprises:

locating experts with low contribution to group consensus:

；

for elements in the EXPS set, a scheme with a lower degree of location consensus:

；

determining, for elements in the ALS set, that the degree of consensus is not greater than the preset thresholdExpert evaluation of (1):

。

optionally, the step of modifying the expert assessment whose degree of consensus is not greater than the preset threshold comprises:

obtaining an adjustment coefficient based on an optimal modelBased onThe adjustment coefficients are obtained with a modified expert evaluation,

wherein the optimal model takes the maximum value of the population consensus improvement as an objective function,the calculation formula of (a) is as follows:

wherein the content of the first and second substances,andrespectively representing the consensus degree on the group level before the evaluation of the change expert and the consensus degree on the group level after the evaluation of the change expert,

wherein, the modified expert evaluation calculation formula is as follows:。

optionally, the optimal fuzzy measure of the attribute set is found by the following formula:

whereinThe evaluation of the population is represented by,andrespectively represent the positive and negative ideal optimal solutions,is to evaluateProximity coefficient relative to negative ideal solution NIS, whereinIs thatAndthe distance between the two or more of the two or more,is attributeAbout measure of blurThe generalized sharley value of (a),representing known attribute weight information.

According to another aspect of the present disclosure, there is provided a group decision apparatus comprising: a processor; and a memory stored with instructions that, when executed by the processor, perform the group decision method as described above.

According to another aspect of the present disclosure, there is provided a computer readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the group decision method as described above.

Drawings

The above and other objects and features of the present invention will become more apparent from the following description taken in conjunction with the accompanying drawings which illustrate, by way of example, an example in which:

FIG. 1 is a flow diagram illustrating a population decision method according to an embodiment of the present disclosure;

FIG. 2 is a flow diagram of an example method of updating decision information, according to an embodiment of the present disclosure;

FIG. 3 is a block diagram of the structure of a group decision device according to an embodiment of the present disclosure; and

fig. 4 is a block diagram of the structure of a group decision device according to another embodiment of the present disclosure.

Detailed Description

Various embodiments of the present disclosure are described below with reference to the drawings, wherein like reference numerals are used to refer to like or similar elements, features, and structures. However, the present disclosure is not intended to be limited to the specific embodiments by the various embodiments described herein, and is intended to: the disclosure is to cover all modifications, equivalents, and/or alternatives of the disclosure as may come within the scope of the following claims and equivalents thereof. The terms and words used in the following description and claims are not limited to their dictionary meanings, but are used only to enable a clear and consistent understanding of the disclosure. Thus, it should be apparent to those skilled in the art that: the following description of various embodiments of the present disclosure is provided for the purpose of illustration only and is not intended to limit the disclosure, which is defined by the appended claims and their equivalents.

It is to be understood that the singular includes the plural unless the context clearly dictates otherwise. The terms "comprising," "including," and "having," as used herein, indicate the presence of the disclosed function, operation, or element, but do not exclude other functions, operations, or elements.

For example, the expression "a or B", or "at least one of a and/or B" may indicate a and B, A or B. For example, the expression "a or B" or "at least one of a and/or B" may indicate (1) a, (2) B, or (3) both a and B.

In various embodiments of the present disclosure, the intent is: when a component (e.g., a first component) is referred to as being "coupled" or "connected" to or to another component (e.g., a second component), the component may be directly connected to the other component or may be connected through the other component (e.g., a third component). In contrast, when a component (e.g., a first component) is referred to as being "directly coupled" or "directly connected" to or directly coupled or directly connected to another component (e.g., a second component), there is no other component (e.g., a third component) between the component and the other component.

The expression "configured to" used in describing the various embodiments of the present disclosure may be used interchangeably with expressions such as "applicable", "having … capability", "designed to", "adapted", "manufactured to" and "capable", for example, as the case may be. The term "configured to" may not necessarily indicate that it is specially designed in terms of hardware. Conversely, the expression "a device configured.. in some cases" may indicate that the device and another device or portion are "… capable". For example, the expression "a processor configured to execute A, B and C" may indicate a dedicated processor (e.g., an embedded processor) for performing the respective operations or a general-purpose processor (e.g., a central processing unit CPU or an Application Processor (AP)) for performing the respective operations by executing at least one software program stored in a memory device.

The terminology used herein is for the purpose of describing certain embodiments of the disclosure, but is not intended to limit the scope of other embodiments. Unless otherwise indicated herein, all terms (including technical or scientific terms) used herein may have the same meaning as commonly understood by one of ordinary skill in the art. In general, terms defined in dictionaries should be considered to have the same meaning as contextual meanings in the related art, and should not be understood differently or to have an excessively formal meaning unless explicitly defined herein. In no event, the terms defined in the present disclosure are not intended to be construed as excluding embodiments of the disclosure.

The terminology used herein is for the purpose of describing certain embodiments of the disclosure, but is not intended to limit the scope of other embodiments. Unless otherwise indicated herein, all terms (including technical or scientific terms) used herein may have the same meaning as commonly understood by one of ordinary skill in the art. In general, terms defined in dictionaries should be considered to have the same meaning as contextual meanings in the related art, and should not be understood differently or to have an excessively formal meaning unless explicitly defined herein. In no event, the terms defined in the present disclosure are not intended to be construed as excluding embodiments of the disclosure.

For a better understanding of the present disclosure, the relevant contents of the prior art for MCGDM are first described.

In the actual problem of expert comprehensive integration discussion, the traditional information expression structure cannot be applied to the situation with strong uncertainty and ambiguity. To solve this problem, information expression structures studied by researchers in recent years mainly include:

fuzzy set

Fuzzy sets were proposed by Zadeh in 1965, however, fuzzy sets do not sufficiently reflect the degree of human perceptual hesitation.

Intuition Fuzzy Set (IFS)

The IFS requires that the sum of the degree of membership and the degree of non-membership remain in the range of [0,1], but this is not practical because many cases do not fully accommodate this constraint.

Pfago Fuzzy Set (PFS)

PFS allows the sum of membership and non-membership to be greater than 1, but their sum of squares to be less than 1.

Interval Value Pythagoras Fuzzy Set (IVPFS)

For IVPFS, the membership, the non-membership and the uncertainty are characterized as interval values instead of single numerical values, so that the IVPFS has strong ambiguity characterization capability and capability of modeling an actual population decision process.

Interaction phenomena, such as redundancy or collaboration, exist in the expert set and the attribute set, so that the fusion mode should reflect the interaction phenomena as much as possible so as to analyze the importance of each element comprehensively.

The interval value Pythagorean fuzzy weighted average operator and the interval value Pythagorean fuzzy weighted geometric operator can successfully aggregate multisource interval value Pythagorean fuzzy numbers, but the integration operators cannot reflect the correlation among input parameters. Fuzzy measures and Choquet integrals can overcome the defects of additive measures and are applied in some fuzzy environments, however, the Choquet integrals only consider the interaction between adjacent element combinations, and therefore the interaction phenomenon which commonly exists in an expert set and an attribute set cannot be comprehensively reflected.

In addition, the expert's opinion may vary greatly during the general ensemble discussion. In order to guide the expert to a specified level of consensus to ensure that most people are satisfied with the group assessment in favor of further decision making. In recent years, various expert consistency promotion and consensus achievement models have been developed, which can be generally divided into two categories: one type is an identification and orientation rules (IDR) based model with an iterative process, which however has a low efficiency due to the need for expert modification opinions; the other is an optimization-based model, however, although the optimization-based consensus model can significantly improve the consensus efficiency, the results obtained from the mathematical model alone cannot guarantee expert involvement.

As described above, for MCGDM, the existing group decision method cannot fully reflect the interaction phenomenon in the expert set and the attribute set, and cannot consider the consensus achievement efficiency and the expert participation degree.

The present disclosure is directed to providing a group assessment method that enables comprehensive analysis of the importance of each element and considers consensus achievement efficiency and expert engagement.

The group decision method and apparatus according to the embodiments of the present disclosure can be used in the fields of Failure Mode and impact Analysis (FMEA), block chain platform evaluation, risk management problem, and the like.

For example, for an FMEA of a power transmission device and an electromechanical system, the conventional FMEA method does not consider the correlation between risk factors, and is insufficient in calibrating 3 risk factors (incidence (O), severity (S), and difficulty in detection (D)) by only numbers between 1 and 10 and performing risk assessment by taking the product of the three as a Risk Priority Number (RPN). The method provided by the invention can effectively consider the association of risk factors (attributes), and can better depict uncertain information of experts by representing the expert evaluation through the interval Pythagorean fuzzy number. And finally, integrating evaluation opinions through the proposed interval Pythagorean Shapley integration operator to comprehensively evaluate the risk mode.

FIG. 1 is a flow chart illustrating a population decision method according to an embodiment of the present disclosure.

Referring to fig. 1, in step S101, an expert is characterized by evaluation of each scheme under each attribute using an interval pythagoras fuzzy set IVPFS to obtain a decision matrix based on the interval pythagoras fuzzy IVPF.

Taking the fault risk analysis of the crane as an example, the following 8 fault modes (i.e., schemes) mainly exist in the gantry crane: rail deformation (FM 1), rail surface abrasion (FM 2), main beam sinking (FM 3), main beam bending (FM 4), gear vibration (FM 5), brake slip (FM 5), box heating (FM 7) and box oil leakage (FM 8). Risk factors (i.e., attributes) are incidence (O), severity (S), and difficulty of detection (D). Through the group decision method disclosed by the invention, the risks appearing in the 8 fault modes can be sequenced, so that a user is prompted to pay more attention to which faults should be. It will be appreciated by those skilled in the art that the fault risk analysis for a crane is merely an example and that the group decision method and apparatus according to embodiments of the present disclosure may be used in other multi-attribute group decision fields.

In particular, IVPFS characterization experts are usedFor the schemeIn each attributeThe following evaluation, and constitute the IVPF-evaluation matrix。

According to the embodiment of the disclosure, the assessment matrix based on the interval Pythagorean fuzzy set can comprehensively represent expert fuzzy information.

In step S102, generalized Shapril values (generalized Shapley index) of the set of experts are obtained based on the lambda-fuzzy measures of the subset of the set of experts.

The following describes a scheme for obtaining a lambda-blur measure for a subset of a set of experts.

According to the following formula (1):

（1）

equation (2) can be obtained:

（2），

can be obtained by the following formula (2)To calculate a measure of blur for a subset of the set of expertsWherein, in the step (A),representing a subset of the set of experts. In particular, based on known expert weightsAnd formulas relating to fuzzy measure calculationFuzzy measures of subsets of the expert set can be derivedWhere A and B represent subsets of the respective sets. Since it is prior art to calculate the fuzzy measure of the subset of the expert set, it is not described herein in detail.

By way of example, the generalized Shapley values for a subset of the expert set are calculated by the following equation (3):

（3）

wherein the content of the first and second substances,respectively representing the total number of experts in the expert set and the number of experts in the subset,the λ -fuzzy measure of the subset of the expert set is represented, and the calculation method of the λ -fuzzy measure of the subset of the expert set has been described above, and is not described herein again.

It will be appreciated by those skilled in the art that the above description is for an expert set-fuzzy measures and generalized sharey value calculation methods, for sets of attributesThe fuzzy measure and the generalized sharley value may be obtained by similar equations, i.e. by changing the corresponding parameters in equations (2) and (3) to the parameters corresponding to the set of attributes.

Those skilled in the art will appreciate that the fuzzy measure representation in accordance with various embodiments of the present disclosure-a measure of blur.

In step S103, an expert group assessment is obtained based on the decision matrix and the generalized sharley values of the expert set.

As an example, the expert group assessment may be calculated by equation (4):

（4）

wherein the content of the first and second substances,presentation expertFor the schemeAbout attributesThe evaluation of (a) is performed,is thatA sort ofAnd is，，Is thatIn the expert collectionMeasure of blurThe generalized sharley value of (a), wherein,andrespectively representing the lower limit values of the membership degree interval and the non-membership degree interval,andand respectively representing the upper limit values of the membership degree interval and the non-membership degree interval.

According to the embodiment of the present disclosure, the decision information having complementary, redundant or independent features is aggregated based on the interval value pythagoras fuzzy sharley integration operator (i.e., formula (4)), so that the importance of the input parameters and the mutual influence between the parameters can be comprehensively reflected.

In step S104, it is determined whether the degree of consensus on the group level is greater than a preset threshold value based on the expert group evaluation.

The process of determining the degree of consensus at the population level is described below.

The degree of consensus at the evaluation level is first calculated:

order toPresentation expertFor the schemeAbout attributesThe evaluation of (a) is performed,for group evaluation, the consensus index of the evaluation can be obtained by equation (5):

(5) wherein。

Based onCalculate consensus on the protocol level:

relative to the populationLevel of consensus onCan be obtained by the formula (6):

(6) wherein。

Based onCalculating the consensus degree on the expert level:

average level of consensus across all assessments relative to the populationCan be obtained by equation (7):

(7) wherein。

Calculating the consensus degree on the group level:

level of group consensusCan be obtained by equation (8):

（8） ，

wherein the content of the first and second substances,is thatIn thatMeasure of blur on setThe generalized sharley value of (a),is thatIn a manner such thatAnd is，. It is clear that,and is andlarger means more consensus among the expert population. Wherein the content of the first and second substances,represents a set of the components of the CL,representing subsetsThe number of the elements in (a) is,representation collectionThe number of elements in (1).

In step S105, in response to determining that the degree of consensus on the population level is greater than the preset threshold, an optimal fuzzy measure of the attribute set is calculated.

As an example, whenGreater than a predetermined thresholdThen, the optimal fuzzy measure of the attribute set is calculated by formula (9):

（9），

whereinThe evaluation of the population is represented by,andrespectively represent the positive and negative ideal optimal solutions,is to evaluateProximity coefficient relative to negative ideal solution NIS, whereinIs thatAnddistance between themAfter the separation, the water is separated from the water,is attributeAbout measure of blurThe generalized sharley value of (a),representing known attribute weight information.

Fig. 2 is a flow diagram illustrating an example method of updating crowd sense decisions according to an embodiment of the disclosure.

As an example, if it is determined in step S104 that the degree of consensus on the group level is not greater than the preset threshold, proceeding to step S201, in response to the degree of consensus on the group level not being greater than the preset threshold, an expert evaluation is modified that the degree of consensus is not greater than the preset threshold.

As an example, an expert evaluation that the degree of consensus is not greater than the preset threshold may be determined by:

locating experts with low contribution to group consensus:

；

for elements in the EXPS set, a scheme with a lower degree of location consensus:

；

determining, for elements in the ALS set, that the degree of consensus is not greater than the preset thresholdExpert evaluation of (1):

。

as an example, the step of modifying the expert assessment for which the degree of consensus is not greater than the preset threshold comprises:

obtaining an adjustment coefficient based on an optimal modelBased onThe adjustment coefficients are obtained with a modified expert evaluation,

wherein the optimal model takes the maximum value of the population consensus improvement as an objective function,the calculation formula of (a) is as follows:

wherein the content of the first and second substances,andrespectively representing the consensus degree on the group level before the evaluation of the change expert and the consensus degree on the group level after the evaluation of the change expert,

wherein, the modified expert evaluation calculation formula is as follows:。

in step S202, the decision information is updated based on the modified expert evaluation. And then returns to step S103. That is, in obtainingThereafter, the decision information is updated and the expert group assessment is recalculated using equation (4), as will be understood by those skilled in the art, the use of equation (4) to recalculate the expert group assessmentIncluding modifiedAnd the degree of agreement without modification is greater than a predetermined threshold. It will be understood by those skilled in the art that the updated decision information indicates new evaluations by the experts for the solutions under the attributes (including evaluations that were modified because the degree of consensus was not greater than the preset threshold and evaluations that were unmodified because the degree of consensus was greater than the preset threshold). Then, the group consensus level was calculated using formulas (5) to (8)So iterating untilGreater than a preset threshold. When in useIf the threshold value is larger than the preset threshold value, step S105 is executed.

In step S106, a generalized sharley value of the attribute set is calculated based on the optimal blur measure.

In step S107, using the calculated generalized sharley values of the attribute sets, the group evaluations are integrated by attribute to obtain the evaluation of each solution. Since it is prior art to calculate the generalized sharey value on the attribute set based on the optimal fuzzy measure and obtain the evaluation of each scheme based on the generalized sharey value of the attribute set, it is not described herein again.

According to the embodiment of the disclosure, the group consistency is achieved by combining the IDR-based model and the comprehensive model of the optimization model, so that the consensus efficiency and the expert participation degree can be considered, and the group consensus can be improved to the greatest extent.

The group decision method is described above with reference to fig. 1-2, and the group decision apparatus according to an embodiment of the present disclosure is described below with reference to fig. 3-4.

FIG. 3 shows a block diagram of a group decision device 300 according to an embodiment of the present disclosure.

Referring to fig. 3, a group decision device 300 may include a processor 301 and a memory 302. It will be understood by those skilled in the art that the group decision apparatus 300 may additionally include other components, and that the components included in the group decision apparatus may be split or combined, and the same function can be achieved before and after the components are split or combined.

The memory 302 may store instructions that, when executed by the processor, perform the group decision method as described above.

The group decision device according to the embodiment of the disclosure can effectively express expert decision information based on fuzzy and uncertain decision information processed by an interval Pythagorean fuzzy set, fuses the decision information through an interval value Pythagorean fuzzy Shapley integration operator based on a generalized Shapley value, can comprehensively reflect the importance of input parameters, can reflect the mutual influence of the input parameters as much as possible, can improve group consistency based on a comprehensive model combined with an IDR (identity recognition) model and an optimization model, and can give consideration to consensus achievement efficiency and expert participation.

Fig. 4 is a block diagram illustrating a structure of a group decision apparatus according to an exemplary embodiment of the present disclosure. The group decision means 400 may be, for example: a smart phone, a tablet computer, an MP3 player (Moving Picture Experts Group Audio Layer III, motion video Experts compression standard Audio Layer 3), an MP4 player (Moving Picture Experts Group Audio Layer IV, motion video Experts compression standard Audio Layer 4), a notebook computer, or a desktop computer. The group decision device 400 may also be referred to by other names such as user equipment, portable terminal, laptop terminal, desktop terminal, and the like.

In general, the group decision device 400 includes: a processor 401 and a memory 402.

Processor 401 may include one or more processing cores, such as a 4-core processor, an 8-core processor, or the like. The processor 1001 may be implemented in at least one hardware form of a DSP (Digital Signal Processing), an FPGA (Field Programmable Gate Array), and a PLA (Programmable Logic Array). The processor 401 may also include a main processor and a coprocessor, where the main processor is a processor for Processing data in an awake state, and is also called a Central Processing Unit (CPU); a coprocessor is a low power processor for processing data in a standby state. In some embodiments, the processor 401 may be integrated with a GPU (Graphics Processing Unit), which is responsible for rendering and drawing the content required to be displayed by the display screen. In some embodiments, the processor 401 may further include an AI (Artificial Intelligence) processor for processing computing operations related to machine learning.

Memory 402 may include one or more computer-readable storage media, which may be non-transitory. Memory 402 may also include high speed random access memory, as well as non-volatile memory, such as one or more magnetic disk storage devices, flash memory storage devices. In some embodiments, a non-transitory computer readable storage medium in memory 402 is used to store at least one instruction for execution by processor 401 to implement the methods of training an echo cancellation model and/or canceling echo delay of the present disclosure.

In some embodiments, the group decision device 400 may further include: a peripheral interface 403 and at least one peripheral. The processor 401, memory 402 and peripheral interface 403 may be connected by bus or signal lines. Each peripheral may be connected to the peripheral interface 403 via a bus, signal line, or circuit board. Specifically, the peripheral device includes: radio frequency circuitry 404, touch screen display 405, camera 406, audio circuitry 407, positioning components 408, and power supply 409.

The peripheral interface 403 may be used to connect at least one peripheral related to I/O (Input/Output) to the processor 401 and the memory 402. In some embodiments, processor 401, memory 402, and peripheral interface 403 are integrated on the same chip or circuit board; in some other embodiments, any one or two of the processor 401, the memory 402 and the peripheral interface 403 may be implemented on a separate chip or circuit board, which is not limited by this embodiment.

The Radio Frequency circuit 404 is used for receiving and transmitting RF (Radio Frequency) signals, also called electromagnetic signals. The radio frequency circuitry 404 communicates with communication networks and other communication devices via electromagnetic signals. The rf circuit 404 converts an electrical signal into an electromagnetic signal to transmit, or converts a received electromagnetic signal into an electrical signal. Optionally, the radio frequency circuit 404 includes: an antenna system, an RF transceiver, one or more amplifiers, a tuner, an oscillator, a digital signal processor, a codec chipset, a subscriber identity module card, and so forth. The radio frequency circuitry 404 may communicate with other terminals via at least one wireless communication protocol. The wireless communication protocols include, but are not limited to: metropolitan area networks, various generation mobile communication networks (2G, 3G, 4G, and 5G), Wireless local area networks, and/or WiFi (Wireless Fidelity) networks. In some embodiments, the radio frequency circuit 404 may also include NFC (Near Field Communication) related circuits, which are not limited by this disclosure.

The display screen 405 is used to display a UI (User Interface). The UI may include graphics, text, icons, video, and any combination thereof. When the display screen 405 is a touch display screen, the display screen 405 also has the ability to capture touch signals on or over the surface of the display screen 405. The touch signal may be input to the processor 401 as a control signal for processing. At this point, the display screen 405 may also be used to provide virtual buttons and/or a virtual keyboard, also referred to as soft buttons and/or a soft keyboard. In some embodiments, the display screen 405 may be one, disposed on the front panel of the group decision device 400; in other embodiments, display screen 405 can be at least two, each disposed on a different surface of terminal 1000 or in a folded design; in still other embodiments, display 405 can be a flexible display disposed on a curved surface or on a folded surface of terminal 1000. Even further, the display screen 405 may be arranged in a non-rectangular irregular pattern, i.e. a shaped screen. The Display screen 405 may be made of LCD (Liquid Crystal Display), OLED (Organic Light-Emitting Diode), and other materials.

The camera assembly 406 is used to capture images or video. Optionally, camera assembly 406 includes a front camera and a rear camera. Generally, a front camera is disposed at a front panel of the terminal, and a rear camera is disposed at a rear surface of the terminal. In some embodiments, the number of the rear cameras is at least two, and each rear camera is any one of a main camera, a depth-of-field camera, a wide-angle camera and a telephoto camera, so that the main camera and the depth-of-field camera are fused to realize a background blurring function, and the main camera and the wide-angle camera are fused to realize panoramic shooting and VR (Virtual Reality) shooting functions or other fusion shooting functions. In some embodiments, camera assembly 406 may also include a flash. The flash lamp can be a monochrome temperature flash lamp or a bicolor temperature flash lamp. The double-color-temperature flash lamp is a combination of a warm-light flash lamp and a cold-light flash lamp, and can be used for light compensation at different color temperatures.

The audio circuit 407 may include a microphone and a speaker. The microphone is used for collecting sound waves of a user and the environment, converting the sound waves into electric signals, and inputting the electric signals to the processor 401 for processing, or inputting the electric signals to the radio frequency circuit 404 for realizing voice communication. For the purpose of stereo sound collection or noise reduction, a plurality of microphones may be provided at different portions of the terminal 400. The microphone may also be an array microphone or an omni-directional pick-up microphone. The speaker is used to convert electrical signals from the processor 401 or the radio frequency circuit 404 into sound waves. The loudspeaker can be a traditional film loudspeaker or a piezoelectric ceramic loudspeaker. When the speaker is a piezoelectric ceramic speaker, the speaker can be used for purposes such as converting an electric signal into a sound wave audible to a human being, or converting an electric signal into a sound wave inaudible to a human being to measure a distance. In some embodiments, audio circuitry 407 may also include a headphone jack.

The positioning component 408 is used to locate the current geographic Location of the group decision device 400 for navigation or LBS (Location Based Service). The Positioning component 408 may be a Positioning component based on the GPS (Global Positioning System) of the united states, the beidou System of china, the graves System of russia, or the galileo System of the european union.

The power supply 409 is used to power the various components in the population decision apparatus 400. The power source 409 may be alternating current, direct current, disposable or rechargeable. When power source 409 comprises a rechargeable battery, the rechargeable battery may support wired or wireless charging. The rechargeable battery may also be used to support fast charge technology.

In some embodiments, the group decision device 400 further includes one or more sensors 410. The one or more sensors 410 include, but are not limited to: acceleration sensor 411, gyro sensor 412, pressure sensor 413, fingerprint sensor 414, optical sensor 415, and proximity sensor 416.

The acceleration sensor 411 may detect the magnitude of acceleration in three coordinate axes of the coordinate system established with the terminal 400. For example, the acceleration sensor 411 may be used to detect components of the gravitational acceleration in three coordinate axes. The processor 401 may control the touch display screen 405 to display the user interface in a landscape view or a portrait view according to the gravitational acceleration signal collected by the acceleration sensor 411. The acceleration sensor 411 may also be used for acquisition of motion data of a game or a user.

The gyro sensor 412 may detect a body direction and a rotation angle of the terminal 400, and the gyro sensor 412 may cooperate with the acceleration sensor 411 to acquire a 3D motion of the terminal 400 by the user. From the data collected by the gyro sensor 412, the processor 401 may implement the following functions: motion sensing (such as changing the UI according to a user's tilting operation), image stabilization at the time of photographing, game control, and inertial navigation.

The pressure sensor 413 may be disposed on a side bezel of the terminal 400 and/or a lower layer of the touch display screen 405. When the pressure sensor 413 is disposed on the side frame of the terminal 400, a user's holding signal to the terminal 400 can be detected, and the processor 401 performs left-right hand recognition or shortcut operation according to the holding signal collected by the pressure sensor 413. When the pressure sensor 413 is disposed at a lower layer of the touch display screen 405, the processor 401 controls the operability control on the UI according to the pressure operation of the user on the touch display screen 405. The operability control comprises at least one of a button control, a scroll bar control, an icon control and a menu control.

The fingerprint sensor 414 is used for collecting a fingerprint of the user, and the processor 401 identifies the identity of the user according to the fingerprint collected by the fingerprint sensor 414, or the fingerprint sensor 414 identifies the identity of the user according to the collected fingerprint. Upon recognizing that the user's identity is a trusted identity, processor 401 authorizes the user to perform relevant sensitive operations including unlocking the screen, viewing encrypted information, downloading software, paying, and changing settings, etc. The fingerprint sensor 414 may be disposed on the front, back, or side of the group decision device 400. When a physical button or vendor Logo is provided on the group decision device 400, the fingerprint sensor 414 may be integrated with the physical button or vendor Logo.

The optical sensor 415 is used to collect the ambient light intensity. In one embodiment, the processor 401 may control the display brightness of the touch display screen 405 based on the ambient light intensity collected by the optical sensor 415. Specifically, when the ambient light intensity is high, the display brightness of the touch display screen 405 is increased; when the ambient light intensity is low, the display brightness of the touch display screen 405 is turned down. In another embodiment, the processor 401 may also dynamically adjust the shooting parameters of the camera assembly 406 according to the ambient light intensity collected by the optical sensor 415.

Proximity sensors 416, also known as distance sensors, are typically provided on the front panel of the population decision device 400. The proximity sensor 416 is used to capture the distance between the user and the front of the group decision device 400. In one embodiment, when the proximity sensor 416 detects that the distance between the user and the front surface of the terminal 400 gradually decreases, the processor 401 controls the touch display screen 405 to switch from the bright screen state to the dark screen state; when the proximity sensor 416 detects that the distance between the user and the front of the group decision device 400 is gradually increased, the processor 401 controls the touch display screen 405 to switch from the breath screen state to the bright screen state.

Those skilled in the art will appreciate that the configuration shown in FIG. 3 does not constitute a limitation of the population decision device 400, and may include more or fewer components than shown, or combine certain components, or employ a different arrangement of components.

According to an embodiment of the present disclosure, there may also be provided a computer-readable storage medium storing instructions that, when executed by at least one processor, cause the at least one processor to perform a group decision method according to the present disclosure. Examples of the computer-readable storage medium herein include: read-only memory (ROM), random-access programmable read-only memory (PROM), electrically erasable programmable read-only memory (EEPROM), random-access memory (RAM), dynamic random-access memory (DRAM), static random-access memory (SRAM), flash memory, non-volatile memory, CD-ROM, CD-R, CD + R, CD-RW, CD + RW, DVD-ROM, DVD-R, DVD + R, DVD-RW, DVD + RW, DVD-RAM, BD-ROM, BD-R, BD-R LTH, BD-RE, Blu-ray or compact disc memory, Hard Disk Drive (HDD), solid-state drive (SSD), card-type memory (such as a multimedia card, a Secure Digital (SD) card or a extreme digital (XD) card), magnetic tape, a floppy disk, a magneto-optical data storage device, an optical data storage device, a hard disk, a magnetic tape, a magneto-optical data storage device, a hard disk, a magnetic tape, a magnetic data storage device, a magnetic tape, a magnetic data storage device, a magnetic tape, a magnetic data storage device, a magnetic tape, a magnetic data storage device, a magnetic tape, a magnetic data storage device, A solid state disk, and any other device configured to store and provide a computer program and any associated data, data files, and data structures to a processor or computer in a non-transitory manner such that the processor or computer can execute the computer program. The computer program in the computer-readable storage medium described above can be run in an environment deployed in a computer apparatus, such as a client, a host, a proxy device, a server, and the like, and further, in one example, the computer program and any associated data, data files, and data structures are distributed across a networked computer system such that the computer program and any associated data, data files, and data structures are stored, accessed, and executed in a distributed fashion by one or more processors or computers.

According to an embodiment of the present disclosure, there may also be provided a computer program product, instructions of which are executable by a processor of a computer device to perform the group decision method as described above.

According to the group decision method, the group decision device, the electronic equipment and the computer readable storage medium, group consensus can be improved to the greatest extent, and the group decision result is more reliable.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.