Integrated Set Parts Supply system in a mixed-model assembly line

The mixed-model assembly line (MMAL) is a type of assembly line in which a variety of product models are assembled on the same line. The use of highly variant parts on the assembly line need to be considered carefully to enable satisfactory material flow control and allow for smooth production. To increase the quality of parts supply and parts assembly in MMAL, Toyota has introduced an innovation system known as Set Parts Supply (SPS). In this paper, we investigate the parts supply issues in SPS implementation using a case study in the automotive industry. The linkage of parts supply strategies with Manufacturing Execution System (MES) is introduced to improve the SPS implementation which are (i) synchronized parts supply, (ii) e-kanban system and (iii) Synchronized Supply Sheet. From the research findings, the integration with MES has contributed to the Just In Time in parts supply at the supermarket area and assembly line.     

TEMPEST: a new Test EnvironMent for Performance Evaluation of the Scheduling of packeTs

The packet scheduling problem has been deeply studied for lot of years by researchers in the computer science and telecommunications fields as an important solution that decides the order in which packets are sent over a link in order to provide QoS on a network. Recently, the packet scheduling has become again a challenging topic due to the massive use of wireless technologies (e.g. WiFi, LTE, 4G/5G) with which to provide high QoS guarantees is still an open problem. Unfortunately, it is difficult to compare different solutions and actually test them in order to select the most proper packet scheduler for each particular environment. In this paper we present TEMPEST, a new Test EnvironMent for Performance Evaluation of the Scheduling of packeTs, which is a novel tool able to help the research in the packet scheduling field. TEMPEST is able to measure the actual performance of a packet scheduler in several environments, both wired or wireless, like the execution time, QoS metrics and throughput, giving prompt feedback about the quality of the solution studied. The goal of this paper is to present in detail the current features of TEMPEST, showing how it is easy to add, configure, test and evaluate several scheduling solutions in multiple scenarios.     

可配置工艺执行系统关键技术研究

为了实现信息系统的可配置性,针对制造企业的生产执行控制管理,提出了一套可配置工艺执行系统解决方案。该方案采用三层架构的设计方式搭建支持配置的系统框架,用面向对象方法建立可配置的信息模型,采取基于二级组件的动态配置方法对系统业务功能组件进行配置,采用基于角色的访问控制模型配置用户权限,在子系统基础上对数据源进行配置,从而实现了系统的可配置。     

建立执行力基础 提升企业管理品质

构建企业架构是企业信息化顶层设计的核心,如何保证企业信息化一次设计,延续使用,而不出现重复建设或者推倒重来的覆辙,就必须与企业运营模式相结合,建设集成的覆盖业务的信息系统,建立企业执行力基础,推动业务与IT对齐,实现执行力自动化,提高企业管理品质。中建八局以建设施工总承包管理为核心,做了有益的探索,我们走的是先标准化再信息化,以信息化倒逼标准化的路径,通过信息系统,使基础管理工作变为强制执行结果,并通过勾稽关系和制度保障系统的推进。经过六年多的实践,在基础管理上取得了丰硕成果,特分享给读者。     

Abstract execution: A technique for efficiently tracing programs

Many areas of computer performance analysis require detailed traces of events that occur during a program's execution. Collecting traces is expensive. The additional code required to record events greatly slows a program's execution. In addition, the resulting trace files can grow unmanageably large. This paper describes a technique called abstract execution that alleviates both problems. Abstract execution records a small set of events during the traced program's execution. These events serve as input to an abstract version of the program that generates a full trace by re-executing selected portions of the original program. This process greatly reduces both the cost of tracing the original program and the size of the trace files. The cost of regenerating a trace is insignificant in comparison to the cost of applications that use it. This paper also describes a system called AE that implements Abstract Execution. The paper contains measurements that demonstrate that AE can efficiently trace large programs.     

论南昌市城区植物造景

通过对南昌城市绿化方面的现状和条件分析,在城市绿地系统的规划布局、植物配置、植物选用等方面进行论述,并提出了一系列措施和实施办法．     

Profiling under UNIX by patching

Profiling under UNIX is done by inserting counters into programs either before compiling, during compiling or during assembly. A fourth type of profiling involves monitoring the execution of a program, and gathering relevant statistics during the run. This paper looks at this method and an implementation of it, and discusses its advantages and disadvantages.     

A matrix model for the flow of control in prolog programs with applications to profiling

In Prolog the flow of control is relatively complex; four counts (which we call currents)—call, fail, succeed and redo—and two intrinsic properties—the failure and the ‘alternative’ probabilities—can be associated with every literal in a clause body. In this work we describe a new matrix model where those currents and properties are related at the literal, clause and predicate definition levels. This model is useful for predicate classification, execution profiling and program debugging. The application to profilers is discussed in detail.     

Improving the performance of retail stores subject to execution errors: coordination versus RFID technology

This paper analyzes a Newsvendor type inventory model in which a manufacturer sells a single product to a retailer store whose inventory is subject to errors stemming from execution problems. Hence, within the store, all of the products are not available on shelf for sales either because the replenishment of the shelf from the backroom is subject to execution errors that mainly result in products lost in the backroom or products misplaced on the other shelves of the store. We compare two situations: in the first situation, the two supply chain actors are aware of errors and optimize their ordering decisions by taking into account this issue. The second situation deals with the case where an advanced automatic identification system such as the Radio Frequency Identification technology is deployed in order to eliminate errors. Each situation is developed for three scenarios: in the centralized scenario, we consider a single decision-maker who is concerned with maximizing the entire supply chain’s profit; in the decentralized uncoordinated scenario, the retailer and the manufacturer act as different parties and do not cooperate. The third scenario is the decentralized coordinated scenario where we give conditions for coordinating the channel by designing a buyback contract. The authors would like to thank the editor, Prof. Dr. Hans-Otto Guenther, and two anonymous referees for their constructive comments to improve this article.     

冶金企业信息化中MES功能及关键技术

主要论述了在ERP/MES/PCS三层结构系统配置中，MES的特点的核心作用，并针对冶金行业的特点，提出了若干MES中有待研究的重大关键技术。