电力供需实验室的开发与建设

国家电网公司电力供需实验室是"十一五"期间国家电网公司重点建设的八大实验室之一。电力实验室由数据信息平台、业务支撑平台和应用平台3层平台构成。三者既相互独立,又相互联系。数据信息平台是电力供需实验室的基础。应用平台是直接面向用户、实现电力供需分析预测以及实验等功能的窗口,业务支撑平台是连接数据信息平台和应用平台的桥梁。目前,电力供需实验室已经基本具备了电力市场分析预测功能以及实验功能,可以应用于年度电力市场分析预测工作中。     

A review of the extensions of a modified EOQ model for imperfect quality items

Imperfect items in the raw material and production stages of a supply chain directly impact the coordination of the product flow within a supply chain. In response to this concern, production and inventory lot sizing models, which incorporate imperfect items into their formulation have become an important and growing area of research. The contribution of Salameh and Jaber (2000) is one of the fundamental models on lot sizing when procured items are of imperfect quality. Over the past decade, there has been a noticeable amount of interest in the EOQ model for imperfect items that was set forth in Salameh and Jaber (2000). Several researchers have published adaptations and extensions of this original model that address supply chain coordination, quality improvement and yield management, and the impact of human error on production and inventory systems. In this paper, we summarize the current body of research that has extended the Salameh and Jaber (2000) EOQ model for imperfect items. Some possible future research directions are identified at the end of the paper.     

Granger因果关系检验应用中的若干问题

分析了实践中应用Granger因果关系检验存在的一些问题,如信息遗漏,变量变换改变因果关系的性质、变量单整性对检验程序的影响以及检验模型的选择等,并提出在线性投影上有初步证据的因果概念。进而,应用单整变量之间Granger因果关系的一般检验程序对1978~2013年我国货币供给量与价格水平、产出之间的Granger因果性重新进行检验。     

Drivers and barriers to environmental supply chain management practices: Lessons from the public and private sectors

This study explores the factors that drive or hinder organisations to implement green supply chain management initiatives. A literature review identifies the main categories of internal and external drivers of green supply chain management practices, including organisational factors, regulation, customers, competitors and society, but there is little indication of suppliers as drivers for green supply chain management. Internal barriers include cost and lack of legitimacy, whereas external barriers include regulation, poor supplier commitment and industry specific barriers. An explorative study is conducted based on interviews from seven different private and public sector organisations. Encouragingly, across the organisations, more drivers than barriers to environmental supply chain management are identified. Organisations seem to be more influenced by external rather than internal drivers. The barriers to environmental supply chain management experienced by organisations tend to be both internal and external.     

Guest Editorial: A purchasing and supply management view of supply resilience for better crisis response

Purchasing and supply management (PSM) has been under great pressure since the COVID-19 pandemic first shook the world. Companies and public organizations faced new kinds of supply disruptions, and at a scale never seen before. New response abilities were required from PSM to address these challenges and disruptions. This Editorial introduces four articles in the Special Issue on “PSM learning from the pandemic: transforming for better crisis management.” These empirical contributions show how companies could build resilience to survive and be competitive during the COVID-19 pandemic. This Editorial discusses how supply resilience should be conceptualized in post-pandemic supply chains adopting a PSM perspective. We suggest that supply resilience practices should be developed and planned according to whether they strengthen existing supply chain relationships (bridging) or establish new ones (buffering) and whether they are short-term (temporary) or long-term (permanent) orientated. Furthermore, three supply resilience capabilities, absorbing, responding and capitalizing, should be prioritized in supply chains for responding to and recovering from global crises and disruptions. Supply resilience is key to crisis response and recovery, and PSM has an essential role in building and sustaining that resilience.     

A hybrid modeling approach for resilient agri-supply network design in emerging countries: Colombian coffee supply chain

Sustainability and resilience in Agri-Food Supply Chains is a challenging topic of current interest in the research community. Resilience for Agri-Food Supply Chain (AFSC) is the capability of the supply network to manage and mitigate disruptions due to global warming and natural phenomena such as landslides and floods of crops, among others caused by humans. A significant challenge is to design efficient and resilient AFSCs in emerging countries while perishability constraints are considered. A methodology to design an AFSC for emerging countries is addressed in this research. The phenomena that aid in identifying critical aspects of the AFSC affecting their resilience are identified. The former approach combines optimization and simulation schemes by considering resilience metrics related to availability and connectivity. Indeed, the solution approach addresses the uncertainty by using simulation of disruptive events and finding resilient designs using mathematical programming. The proposed framework has been evaluated in a Colombian coffee supply chain. The obtained results show the efficiency of the proposed scheme to design AFSCs and allow the practitioners to measure, predict, compare, and improve the level of resilience of their supply chains (SCs).     

旅游服务供应链中若干环节的协调

自20世纪90年代以来,有些学者已经认识到供应链思想应用于旅游业的重要作用,从不同角度对旅游业的发展应加强供应链建设进行了探讨,而目前我国对旅游服务供应链的研究尚处于初始阶段.对于旅游业而言,旅游产品综合性的特点决定了单个旅游企业不可能提供完全的产品,此种属性同时也决定了旅游服务供应链的存在和形成.旅游服务供应链一旦形成,就需要我们考虑各个企业之间的衔接和协调问题.本文先叙述了旅游服务供应链的概念,然后应用博弈模型、经典报童模型就旅游服务供应链中若干环节的协调进行讨论并给出对策.     

Optimizing the credit term decisions in supply chain finance

We study a credit term determination problem in the context of a supplier-buyer supply chain. The supplier's credit term decision is simultaneously made with its production and inventory decisions, and most importantly, it is impacted by the buyer's order quantity. We present a new game-theoretic framework to model this problem, which captures the interaction between the supplier's credit term decision and the buyer's order decision in a multi-period setting. An exact method based on nonlinear programming is implemented to obtain the optimal solutions. We apply our methodologies on a real world case. The computational results show that our approach significantly outperforms the heuristics with fixed credit terms, and either a short or a long credit term can be sub-optimal for the supplier in profitability. Our work offers the first data-driven model and solution approach that assists purchasing and supply managers to make optimal dynamic credit term decision in conjunction with production, ordering and inventory decisions in a game-theoretic setting.     

A study on X party material flow: the theory and applications

A thorough study of X party material flow (XPMF), its theory and its applications is conducted in this research. The X material flow concept is an extension of the material flow (MF) theory. To further elucidate that XPMF is one type of MF service model with PMF (party, material, flow) fractal structure and the characteristics of XPMF, we develop the three-pyramid synergetic operational model of XPMF. Through the analysis of several cases, we believe that OIR (Objective relational grade, Information sharing grade, and Resource complementary grade) is the set of order parameters that control and determine the formation of XPMF new structure and its degree of being ordered. Therefore it reveals the mechanism of XPMF formation and evolution. We also provide the principles and the methods for XPMF control.     

ebXML与RosettaNet模式的供应链系统比较

比较了ebXML和RosettaNet两种模式下基于web的供应链信息系统的框架,从供应链的组织结构和信息结构角度分析其实施过程和效率影响,并结合中国企业信息化进程提出了实施供应链信息系统的建议。