The buyer-supplier relationship plays a great role in most economic systems. The buying firm usually tries to find a new supplier who provides products with satisfying quality and lower price. A broad branch of litera...The buyer-supplier relationship plays a great role in most economic systems. The buying firm usually tries to find a new supplier who provides products with satisfying quality and lower price. A broad branch of literature deals with the development of buyer-supplier relationships, but limited research is on the circumstances under which a buyer should terminate such a relationship and switch to a new supplier. In this paper, the incentive compatibility constraint (IC) which induces the entrant supplier to report his true cost is considered, and the participation constraint (PC) which ensures the entrant supplier to get at least reservation profit is taken into account. Then the supplier switching model is set up to minimize the buying firm's total procurement cost which includes the transfer payment to the incumbent supplier, the payment to the entrant supplier and the switching cost, and the buying firm's switching cost is considered as a function of the switching quantity. With the theoretical analysis of IC, PC and the proposed model, the optimal supplier switching strategy can be obtained. Finally, a numerical example is given to illustrate the effectiveness of the proposed model and the switching strategy.展开更多
The optimization investment policy decision of SCM-Supply Chain Management-implementation has been analysed under symmetric and asymmetric information conditions. For both conditions, SCM implementation options’ deci...The optimization investment policy decision of SCM-Supply Chain Management-implementation has been analysed under symmetric and asymmetric information conditions. For both conditions, SCM implementation options’ decision optimizing models have been developed. In these models, both clients and vendors try to pursue their own benefits. Based upon the principal-agent theory, the models show to what extent a principal (a client) needs to pay more to an agent (a vendor) in a context of asymmetric information. For the client, it is important to understand the extra costs to be able to adopt effective strategies to stimulate a vendor to perform an optimal implementation of a SCM system. The results of a simulation experiment regarding SCM implementation options illustrate and verify the theoretical findings and confirm the general notion that the less informed party is obliged to pay information rent to the better-informed party.展开更多
The enhanced power quality provided by multilevel inverters(MLIs)has made them more appropriate for medium-and high-power applications,including photovoltaic systems.Nevertheless,a prevalent limitation involves the ne...The enhanced power quality provided by multilevel inverters(MLIs)has made them more appropriate for medium-and high-power applications,including photovoltaic systems.Nevertheless,a prevalent limitation involves the necessity for numerous switches and increased voltage stress across these switches,consequently increasing the overall system cost.To address these challenges,a new 17-level asymmetrical MLI with fewer components and low voltage stress is proposed for the photovoltaic system.This innovative MLI configuration has four direct current(DC)sources and 10 switches.Based on the trinary sequence,the proposed topology uses photovoltaics with boost converters and fuzzy logic controllers as its DC sources.Mathematical equations are used to calculate cru-cial parameters for this proposed design,including total standing voltage per unit(TSVPU),cost function per level(CF/L),component count per level(CC/L)and voltage stress across the switches.The comparison is conducted by considering switches,DC sources,TSVPU,CF/L,gate driver circuits and CC/L with other existing MLI topologies.The analysis is carried out under various conditions,encompassing different levels of irradiance,variable loads and modulation indices.To reduce the total harmonic distortion of the suggested topology,the phase opposition disposition approach has been incorporated.The suggested framework is simulated in MATLAB®/Simulink®.The results indicate that the proposed topology achieves a well-distributed stress profile across the switches and has CC/L of 1.23,TSVPU of 5 and CF/L of 4.58 and 5.76 with weight coefficients of 0.5 and 1.5,respectively.These values are not-ably superior to those of existing MLI topologies.Simulation results demonstrate that the proposed topology maintains a consistent output at varying irradiance levels with FLCs and exhibits robust performance under variable loads and diverse modulation indices.Furthermore,the total harmonic distortion achieved with phase opposition disposition is 7.78%,outperforming alternative pulse width modulation techniques.In summary,it provides enhanced performance.Considering this,it is suitable for the photovoltaic system.展开更多
When selling multiple products with asymmetric uncertainty,should the seller disclose product information so that customers do not have to incur any cost to resolve their uncertainties;if so,which product should the s...When selling multiple products with asymmetric uncertainty,should the seller disclose product information so that customers do not have to incur any cost to resolve their uncertainties;if so,which product should the seller choose?To address these questions,we consider a monopolist selling two substitutable products to a group of consumers.Each consumer has asymmetric uncertainty regarding the two products.A total of four different information provision structures are considered based on whether the seller discloses information about each product with the aim of determining which strategy provides the seller with the greatest revenue.We derive several interesting results.First,the optimal information provision strategy depends on the magnitude of uncertainty in relation to the product with lower uncertainty.Specifically,if the uncertainty regarding the product with lower uncertainty is sufficiently small,it is optimal for the seller to provide information about the product with higher uncertainty,otherwise,the seller should provide information about both products.Second,when only one product's information should be revealed,it is optimal for the seller to choose the product with higher uncertainty and charge a higher price.Third,withholding information on both products is never optimal for the seller.Finally,our main model is extended by examining the Mean-Preserving Spread setting,and the robustness of our main results is confirmed.Furthermore,we examine the situation in which a monopolist sells a single product with two main attributes.We find that each of the four information provision strategies can be optimal under various scenarios.展开更多
Pollution cost control is key to solve pollution problem.The paper takes pollution control cost of pollution control contract between management authority and pollutant discharge enterprise as research object,consider...Pollution cost control is key to solve pollution problem.The paper takes pollution control cost of pollution control contract between management authority and pollutant discharge enterprise as research object,considers pollution control quality level,pollution control quality inspection and pollution control cost model,and establishes pollution control cost model of management authority and pollutant discharge enterprise,including rational constraints of pollutant discharge enterprise.And it analyzes principal-agent relationship between the two under condition of asymmetric information,and un-observability of pollution control level is shown as hiding information of sewage enterprises.In essence,it is problem of adverse selection in principal-agent.Pollution control cost of management is objective function.The first order condition of pollution control cost of sewage enterprise is transformed into state space equation,and optimal control of problem is solved by using maximum principle.In particular,management authority,as principal,uses pollution control provisions to reward,punish and encourage pollutant discharge enterprises as agents.展开更多
基金Supported by National Natural Science Foundation of China (No. 61004015 and No. 71071106)Program for Changjiang Scholars and Innovative Research Team in University (No. IRT1028)
文摘The buyer-supplier relationship plays a great role in most economic systems. The buying firm usually tries to find a new supplier who provides products with satisfying quality and lower price. A broad branch of literature deals with the development of buyer-supplier relationships, but limited research is on the circumstances under which a buyer should terminate such a relationship and switch to a new supplier. In this paper, the incentive compatibility constraint (IC) which induces the entrant supplier to report his true cost is considered, and the participation constraint (PC) which ensures the entrant supplier to get at least reservation profit is taken into account. Then the supplier switching model is set up to minimize the buying firm's total procurement cost which includes the transfer payment to the incumbent supplier, the payment to the entrant supplier and the switching cost, and the buying firm's switching cost is considered as a function of the switching quantity. With the theoretical analysis of IC, PC and the proposed model, the optimal supplier switching strategy can be obtained. Finally, a numerical example is given to illustrate the effectiveness of the proposed model and the switching strategy.
文摘The optimization investment policy decision of SCM-Supply Chain Management-implementation has been analysed under symmetric and asymmetric information conditions. For both conditions, SCM implementation options’ decision optimizing models have been developed. In these models, both clients and vendors try to pursue their own benefits. Based upon the principal-agent theory, the models show to what extent a principal (a client) needs to pay more to an agent (a vendor) in a context of asymmetric information. For the client, it is important to understand the extra costs to be able to adopt effective strategies to stimulate a vendor to perform an optimal implementation of a SCM system. The results of a simulation experiment regarding SCM implementation options illustrate and verify the theoretical findings and confirm the general notion that the less informed party is obliged to pay information rent to the better-informed party.
文摘The enhanced power quality provided by multilevel inverters(MLIs)has made them more appropriate for medium-and high-power applications,including photovoltaic systems.Nevertheless,a prevalent limitation involves the necessity for numerous switches and increased voltage stress across these switches,consequently increasing the overall system cost.To address these challenges,a new 17-level asymmetrical MLI with fewer components and low voltage stress is proposed for the photovoltaic system.This innovative MLI configuration has four direct current(DC)sources and 10 switches.Based on the trinary sequence,the proposed topology uses photovoltaics with boost converters and fuzzy logic controllers as its DC sources.Mathematical equations are used to calculate cru-cial parameters for this proposed design,including total standing voltage per unit(TSVPU),cost function per level(CF/L),component count per level(CC/L)and voltage stress across the switches.The comparison is conducted by considering switches,DC sources,TSVPU,CF/L,gate driver circuits and CC/L with other existing MLI topologies.The analysis is carried out under various conditions,encompassing different levels of irradiance,variable loads and modulation indices.To reduce the total harmonic distortion of the suggested topology,the phase opposition disposition approach has been incorporated.The suggested framework is simulated in MATLAB®/Simulink®.The results indicate that the proposed topology achieves a well-distributed stress profile across the switches and has CC/L of 1.23,TSVPU of 5 and CF/L of 4.58 and 5.76 with weight coefficients of 0.5 and 1.5,respectively.These values are not-ably superior to those of existing MLI topologies.Simulation results demonstrate that the proposed topology maintains a consistent output at varying irradiance levels with FLCs and exhibits robust performance under variable loads and diverse modulation indices.Furthermore,the total harmonic distortion achieved with phase opposition disposition is 7.78%,outperforming alternative pulse width modulation techniques.In summary,it provides enhanced performance.Considering this,it is suitable for the photovoltaic system.
基金research grant from the National Natural Science Foundation of China(Project No.92167206,71872125)research grant from the Innovation Method Special Project of the Ministry of Science and Technology of China(Project No.2020IM030300).
文摘When selling multiple products with asymmetric uncertainty,should the seller disclose product information so that customers do not have to incur any cost to resolve their uncertainties;if so,which product should the seller choose?To address these questions,we consider a monopolist selling two substitutable products to a group of consumers.Each consumer has asymmetric uncertainty regarding the two products.A total of four different information provision structures are considered based on whether the seller discloses information about each product with the aim of determining which strategy provides the seller with the greatest revenue.We derive several interesting results.First,the optimal information provision strategy depends on the magnitude of uncertainty in relation to the product with lower uncertainty.Specifically,if the uncertainty regarding the product with lower uncertainty is sufficiently small,it is optimal for the seller to provide information about the product with higher uncertainty,otherwise,the seller should provide information about both products.Second,when only one product's information should be revealed,it is optimal for the seller to choose the product with higher uncertainty and charge a higher price.Third,withholding information on both products is never optimal for the seller.Finally,our main model is extended by examining the Mean-Preserving Spread setting,and the robustness of our main results is confirmed.Furthermore,we examine the situation in which a monopolist sells a single product with two main attributes.We find that each of the four information provision strategies can be optimal under various scenarios.
基金2021 Ph.D.Program of Hainan Normal University(RC2100004363)。
文摘Pollution cost control is key to solve pollution problem.The paper takes pollution control cost of pollution control contract between management authority and pollutant discharge enterprise as research object,considers pollution control quality level,pollution control quality inspection and pollution control cost model,and establishes pollution control cost model of management authority and pollutant discharge enterprise,including rational constraints of pollutant discharge enterprise.And it analyzes principal-agent relationship between the two under condition of asymmetric information,and un-observability of pollution control level is shown as hiding information of sewage enterprises.In essence,it is problem of adverse selection in principal-agent.Pollution control cost of management is objective function.The first order condition of pollution control cost of sewage enterprise is transformed into state space equation,and optimal control of problem is solved by using maximum principle.In particular,management authority,as principal,uses pollution control provisions to reward,punish and encourage pollutant discharge enterprises as agents.
