In this present paper, a deterministic lot size model is developed for deteriorating items with incremental quantity discounts. It is assumed that shortages are permitted to occur and fully backlogged. A simple solut...In this present paper, a deterministic lot size model is developed for deteriorating items with incremental quantity discounts. It is assumed that shortages are permitted to occur and fully backlogged. A simple solution procedure is shown for determining the optimal order lot size and the optimal order cycle. A numerical example is used to illustrate how the solution procedure works.展开更多
This study investigates the electric energy shortages impact upon the residential sector in Riyadh city, the capital of the Kingdom of Saudi Arabia (KSA) resulting from severe power outages. The results reveal the ext...This study investigates the electric energy shortages impact upon the residential sector in Riyadh city, the capital of the Kingdom of Saudi Arabia (KSA) resulting from severe power outages. The results reveal the extent of hardship and high costs the residential will suffer and endure. These outages occur and extend for longer durations. To mitigate these consequences, a method is suggested known as “willingness-to-pay” to seek the ability and willingness of consumers to pay to avert these power outages and energy shortages. Two approaches have been developed and utilized. The first one is based on a consumer survey to estimate his perceived costs. Outages occur in specific periods and last for longer durations. The second approach focussed on developing a mathematical model to complement the survey approach as this model can decrease the size of the problem complexity associated with consumer lack of experience in evaluating and assessing the worth of service reliability and quality.展开更多
Electricity shortages present a significant constraint on manufacturers,who rely on electricity as an important input into production.In China,electricity supply has been growing rapidly.However,the rapid industrializ...Electricity shortages present a significant constraint on manufacturers,who rely on electricity as an important input into production.In China,electricity supply has been growing rapidly.However,the rapid industrialization sometimes makes the power supply still unable to meet the demand.Using a survey of 1673 Chinese manufacturing firms,this paper explores how firms response to electricity shortages and its impact on productivity.We find that self-generation of electricity and investment in Research and Development(R&D)have significant positive relationships with electricity shortages.Further investigations reveal that self-generation is the most common way to deal with electricity shortages.However,it aggravates productivity loss.Though investment in Research and Development can promote productivity,it cannot offset the negative impact of electricity shortages on productivity.Analyses on subsamples show heterogeneity in the impacts of electricity shortages across firms.In particular,large firms are more inclined to invest in R&D than small and medium-sized firms are.They are also the one who suffer significant productivity loss due to self-generation of electricity.Though it is possible for medium-sized firms to reduce productivity loss through R&D,they are not likely to invest in R&D as a response to electricity shortages.This study illustrates that firms can hardly have effective solutions to electricity shortages,and policy makers should take great efforts to increase electricity supply.展开更多
COVID-19, a contagious respiratory disease, presents immediate and unforeseen challenges to people worldwide. Moreover, its transmission rapidly extends globally due to its viral transmissibility, emergence of novel s...COVID-19, a contagious respiratory disease, presents immediate and unforeseen challenges to people worldwide. Moreover, its transmission rapidly extends globally due to its viral transmissibility, emergence of novel strains (variants), absence of immunity, and human unawareness. This framework introduces a revised epidemic model, drawing upon mathematical principles. This model incorporates a modified vaccination and lockdown approach to comprehensively depict an epidemics transmission, containment, and decision-making processes within a community. This study aims to provide policymakers with precise information on real-world situations to assist them in making informed decisions about the implementation of lockdown strategies, maintenance variables, and vaccine availability. The suggested model has conducted stability analysis, strength number analysis, and first and second-order derivative analysis of the Lyapunov function and has established the existence and uniqueness of solutions of the proposed models. We examine the combined effects of an effective vaccination campaign and non-pharmaceutical measures such as lockdowns and states of emergency. We rely on the results of this research to assist policymakers in various countries in eradicating the illness by developing more innovative measures to control the outbreak.展开更多
The recent electricity supply shortage in the People’s Republic of China(PRC)is driven by a disequilibrium in demand and supply.Energ y demand has picked up with the economy recovering and industry growing,strongly s...The recent electricity supply shortage in the People’s Republic of China(PRC)is driven by a disequilibrium in demand and supply.Energ y demand has picked up with the economy recovering and industry growing,strongly supported by solid merchandise export growth.At the same time,soaring coal prices have hit power producers curtailing growth in electricity supply.展开更多
The introduction of the new budget law is one of the most important achievements of the construction of national legal system. It is a landmark event in building financial system. The new budget law has made a lot of ...The introduction of the new budget law is one of the most important achievements of the construction of national legal system. It is a landmark event in building financial system. The new budget law has made a lot of breakthroughs and innovations in the budget managemenL to lead direction for further deepen fiscal reform. However, the modification of the budget law can only adopt the principle of limited modification, there are still many problems. This paper discusses the innovation and deficiency of the new budget law under the background of budget law modification, and makes suggestions to further improve the budget law.展开更多
According to the discussion of domestic scholars on county talents,we know that the researches concerning county human resources mainly focus on discussing the problems such as the total amount,distribution,quality an...According to the discussion of domestic scholars on county talents,we know that the researches concerning county human resources mainly focus on discussing the problems such as the total amount,distribution,quality and introduction of county talents though the analysis of coordination between talents and county economic development,and the research of relationship between industry adjustment and talents need.However,there have no relevant documents about the analysis and discussion of county talents problems based on system schema theory.In view of this reality,on the basis of the introduction of the system schema theory propounded by management guru Peter Senge,we conduct the feedback schema analysis of the restricted factors of talents shortages during county economic development;establish the growth limits schema of county talents system;analyze the functioning mechanism of the total amount,distribution,quality and introduction of county talents on the development of county economy;discuss the relationship between the individual quality,social relation and emotional need of returning-home start-up,and talents resource shortage;propose the countermeasures and suggestions to mitigate the shortage of county talents,in order to optimize the allocation of county human resources,and promote the county's economic development.展开更多
The present paper focuses an optimal policy of an inventory model for deteriorating items with generalized demand rate and deterioration rate. Shortages are allowed and partially backlogged. The salvage value is inclu...The present paper focuses an optimal policy of an inventory model for deteriorating items with generalized demand rate and deterioration rate. Shortages are allowed and partially backlogged. The salvage value is included into deteriorated units. The main objective of the model is to minimize the total cost by optimizing the value of the shortage point, cycle length and order quantity. A numerical example is carried out to illustrate the model and sensitivity analyses of major parameters are discussed.展开更多
Objective To analyze the causes of drug shortages in China and put forward some countermeasures and suggestions accordingly.Methods Based on the relevant data of 14 provinces that issued the lists of drug shortages fr...Objective To analyze the causes of drug shortages in China and put forward some countermeasures and suggestions accordingly.Methods Based on the relevant data of 14 provinces that issued the lists of drug shortages from 2018 to 2020,377 kinds of drugs were sorted out first,and then the features of shortage were analyzed descriptively.Finally,the degree and causes of shortage were studied based on field investigation and literature summary.Results and Conclusion Among the drugs in short supply across the country,69.2%of them were listed in the National Medical Insurance Catalogue,37.1%were essential drugs and 26.5%were low-price drugs.They were used for different diseases,and most were for treating nervous system and blood system.There were many reasons for drug shortages.For instance,any problems in supply chain(production,circulation,use)could lead to drug shortages,of which the production accounted for the largest proportion.This paper puts forward targeted measures to solve drug shortages from the aspects of unwillingness and inability of manufacturing enterprises in their production.展开更多
Objective To study how to improve and perfect the information platform and processing mechanism of drug shortages in China.Methods By searching the relevant policies from official websites of FDA,European Medicines Ag...Objective To study how to improve and perfect the information platform and processing mechanism of drug shortages in China.Methods By searching the relevant policies from official websites of FDA,European Medicines Agency(EMA),Health Canada(HC)and National Health Commission,the good experience of the United States,the European Union and Canada in the construction of information platform and processing mechanism of drug shortages was summarized for reference in China.Results and Conclusion China has initially established the processing mechanism of drug shortages,but the platform construction should be improved,and the information disclosure of drug shortages varies from province to province.We should improve the information platform of drug shortages,strengthen the disclosure and communication of information,enrich the processing tools and measures after the drug shortages occurs,and strengthen the cooperation with relevant associations and other non-governmental departments.展开更多
"Water,woater evenyuwhere,and nary a drop to drink!"Poetry becomes reality in China,as experts scramble to find new supplies of the preious liquid to slake the thirst of a growing population and industry.
血液作为重要的资源,直接关系到患者生命健康和医疗业务活动连续性,鉴于其只能来自献血者的自愿捐赠,容易因外界各种因素影响而处于供应紧缺状态。本文作为介绍“英国血液紧缺应急计划”系列文章第一部分,旨在对英国应急管理体系,尤其...血液作为重要的资源,直接关系到患者生命健康和医疗业务活动连续性,鉴于其只能来自献血者的自愿捐赠,容易因外界各种因素影响而处于供应紧缺状态。本文作为介绍“英国血液紧缺应急计划”系列文章第一部分,旨在对英国应急管理体系,尤其是卫生应急管理的情况进行概述。本文阐述了英国的应急管理法规标准体系和机制体制、关于应急准备与实施指导意见的非法规性指导文件、以及负责应急协调与合作的跨部门多机构的地方韧性联席会议制度、英国政府能力建设、有关应急响应主体和应急指挥控制机制等内容;在此基础上,本文进一步详细介绍了英国卫生应急体系的法律基础和国家医疗服务体系(national health service,NHS)应急准备、韧性和响应(emergency preparedness,resilience and response,EPRR)核心标准体系,并列举了相应文件。展开更多
文摘In this present paper, a deterministic lot size model is developed for deteriorating items with incremental quantity discounts. It is assumed that shortages are permitted to occur and fully backlogged. A simple solution procedure is shown for determining the optimal order lot size and the optimal order cycle. A numerical example is used to illustrate how the solution procedure works.
文摘This study investigates the electric energy shortages impact upon the residential sector in Riyadh city, the capital of the Kingdom of Saudi Arabia (KSA) resulting from severe power outages. The results reveal the extent of hardship and high costs the residential will suffer and endure. These outages occur and extend for longer durations. To mitigate these consequences, a method is suggested known as “willingness-to-pay” to seek the ability and willingness of consumers to pay to avert these power outages and energy shortages. Two approaches have been developed and utilized. The first one is based on a consumer survey to estimate his perceived costs. Outages occur in specific periods and last for longer durations. The second approach focussed on developing a mathematical model to complement the survey approach as this model can decrease the size of the problem complexity associated with consumer lack of experience in evaluating and assessing the worth of service reliability and quality.
基金supported by“Philosophy and Social Sciences Planned Project of Anhui Province,China”(Grant No.AHSKY2020D37).
文摘Electricity shortages present a significant constraint on manufacturers,who rely on electricity as an important input into production.In China,electricity supply has been growing rapidly.However,the rapid industrialization sometimes makes the power supply still unable to meet the demand.Using a survey of 1673 Chinese manufacturing firms,this paper explores how firms response to electricity shortages and its impact on productivity.We find that self-generation of electricity and investment in Research and Development(R&D)have significant positive relationships with electricity shortages.Further investigations reveal that self-generation is the most common way to deal with electricity shortages.However,it aggravates productivity loss.Though investment in Research and Development can promote productivity,it cannot offset the negative impact of electricity shortages on productivity.Analyses on subsamples show heterogeneity in the impacts of electricity shortages across firms.In particular,large firms are more inclined to invest in R&D than small and medium-sized firms are.They are also the one who suffer significant productivity loss due to self-generation of electricity.Though it is possible for medium-sized firms to reduce productivity loss through R&D,they are not likely to invest in R&D as a response to electricity shortages.This study illustrates that firms can hardly have effective solutions to electricity shortages,and policy makers should take great efforts to increase electricity supply.
文摘COVID-19, a contagious respiratory disease, presents immediate and unforeseen challenges to people worldwide. Moreover, its transmission rapidly extends globally due to its viral transmissibility, emergence of novel strains (variants), absence of immunity, and human unawareness. This framework introduces a revised epidemic model, drawing upon mathematical principles. This model incorporates a modified vaccination and lockdown approach to comprehensively depict an epidemics transmission, containment, and decision-making processes within a community. This study aims to provide policymakers with precise information on real-world situations to assist them in making informed decisions about the implementation of lockdown strategies, maintenance variables, and vaccine availability. The suggested model has conducted stability analysis, strength number analysis, and first and second-order derivative analysis of the Lyapunov function and has established the existence and uniqueness of solutions of the proposed models. We examine the combined effects of an effective vaccination campaign and non-pharmaceutical measures such as lockdowns and states of emergency. We rely on the results of this research to assist policymakers in various countries in eradicating the illness by developing more innovative measures to control the outbreak.
文摘The recent electricity supply shortage in the People’s Republic of China(PRC)is driven by a disequilibrium in demand and supply.Energ y demand has picked up with the economy recovering and industry growing,strongly supported by solid merchandise export growth.At the same time,soaring coal prices have hit power producers curtailing growth in electricity supply.
文摘The introduction of the new budget law is one of the most important achievements of the construction of national legal system. It is a landmark event in building financial system. The new budget law has made a lot of breakthroughs and innovations in the budget managemenL to lead direction for further deepen fiscal reform. However, the modification of the budget law can only adopt the principle of limited modification, there are still many problems. This paper discusses the innovation and deficiency of the new budget law under the background of budget law modification, and makes suggestions to further improve the budget law.
基金Supported by Jiangxi Province Program of Soft Science Foundation
文摘According to the discussion of domestic scholars on county talents,we know that the researches concerning county human resources mainly focus on discussing the problems such as the total amount,distribution,quality and introduction of county talents though the analysis of coordination between talents and county economic development,and the research of relationship between industry adjustment and talents need.However,there have no relevant documents about the analysis and discussion of county talents problems based on system schema theory.In view of this reality,on the basis of the introduction of the system schema theory propounded by management guru Peter Senge,we conduct the feedback schema analysis of the restricted factors of talents shortages during county economic development;establish the growth limits schema of county talents system;analyze the functioning mechanism of the total amount,distribution,quality and introduction of county talents on the development of county economy;discuss the relationship between the individual quality,social relation and emotional need of returning-home start-up,and talents resource shortage;propose the countermeasures and suggestions to mitigate the shortage of county talents,in order to optimize the allocation of county human resources,and promote the county's economic development.
文摘The present paper focuses an optimal policy of an inventory model for deteriorating items with generalized demand rate and deterioration rate. Shortages are allowed and partially backlogged. The salvage value is included into deteriorated units. The main objective of the model is to minimize the total cost by optimizing the value of the shortage point, cycle length and order quantity. A numerical example is carried out to illustrate the model and sensitivity analyses of major parameters are discussed.
文摘Objective To analyze the causes of drug shortages in China and put forward some countermeasures and suggestions accordingly.Methods Based on the relevant data of 14 provinces that issued the lists of drug shortages from 2018 to 2020,377 kinds of drugs were sorted out first,and then the features of shortage were analyzed descriptively.Finally,the degree and causes of shortage were studied based on field investigation and literature summary.Results and Conclusion Among the drugs in short supply across the country,69.2%of them were listed in the National Medical Insurance Catalogue,37.1%were essential drugs and 26.5%were low-price drugs.They were used for different diseases,and most were for treating nervous system and blood system.There were many reasons for drug shortages.For instance,any problems in supply chain(production,circulation,use)could lead to drug shortages,of which the production accounted for the largest proportion.This paper puts forward targeted measures to solve drug shortages from the aspects of unwillingness and inability of manufacturing enterprises in their production.
文摘Objective To study how to improve and perfect the information platform and processing mechanism of drug shortages in China.Methods By searching the relevant policies from official websites of FDA,European Medicines Agency(EMA),Health Canada(HC)and National Health Commission,the good experience of the United States,the European Union and Canada in the construction of information platform and processing mechanism of drug shortages was summarized for reference in China.Results and Conclusion China has initially established the processing mechanism of drug shortages,but the platform construction should be improved,and the information disclosure of drug shortages varies from province to province.We should improve the information platform of drug shortages,strengthen the disclosure and communication of information,enrich the processing tools and measures after the drug shortages occurs,and strengthen the cooperation with relevant associations and other non-governmental departments.
文摘"Water,woater evenyuwhere,and nary a drop to drink!"Poetry becomes reality in China,as experts scramble to find new supplies of the preious liquid to slake the thirst of a growing population and industry.
文摘血液作为重要的资源,直接关系到患者生命健康和医疗业务活动连续性,鉴于其只能来自献血者的自愿捐赠,容易因外界各种因素影响而处于供应紧缺状态。本文作为介绍“英国血液紧缺应急计划”系列文章第一部分,旨在对英国应急管理体系,尤其是卫生应急管理的情况进行概述。本文阐述了英国的应急管理法规标准体系和机制体制、关于应急准备与实施指导意见的非法规性指导文件、以及负责应急协调与合作的跨部门多机构的地方韧性联席会议制度、英国政府能力建设、有关应急响应主体和应急指挥控制机制等内容;在此基础上,本文进一步详细介绍了英国卫生应急体系的法律基础和国家医疗服务体系(national health service,NHS)应急准备、韧性和响应(emergency preparedness,resilience and response,EPRR)核心标准体系,并列举了相应文件。
