CPFR原理及实施

CPFR能寿命帮助合作伙伴建立比较准确的预测和高效的补给计划，在高水平服务的前提下扩大销售并降低库存。通过一系列业务流程的实施，制度共同的销售和运作计划，并通过电子化的交流与沟通合作修改销售计划和补给计划，从而提高计划的准确性，有效地降低成本。提出了实现CPFR的组织方法，数据组织，业务规则和软硬件标准。     

物料需求计划不稳定性的模拟研究

介绍物料需求计划不稳定性的基本概念和模拟研究方法。在不确定性需求的流动式计划环境下,研究冻结参数和计划算法在不同生产条件下对物料需求计划不稳定性的影响。通过设计模拟实验和大量模拟计算及统计分析表现：费用结构、预测模式、冻结比例、计划周期和计划算法对物料需求计划不稳定性有较大影响,且交互作用显著。研究结果对减小物料需求计划的不稳定性有一定指导意义。     

供应链管理中的供应链计划

论述了供应链的战略计划、战术计划和运作计划。基于信息技术的供应链管理系统中的利用多组织、货源规则和分销清单构造供应链的物流网络，可以进行供应链的多组织的整体计划或分步计划，并进一步研究了供应链计划的逻辑、方法。通过举例说明了供应链计划的整体计划和分步计划运行方法。最后讨论了应用高级计划及排程的供应链计划和ERP的差异。     

缩短多阶响应周期的供应链新型计划模式

随着顾客需求多样性与市场竞争不确定性的日益加剧,缩短供应链多阶响应周期的计划模式已逐渐成为供应链计划模式研究中的重要领域。本文在对新经济环境中现有供应链计划模式的不足进行了分析的基础之上,提出了三种以缩短多阶响应周期为考虑要点的整体化的新型计划模式,并结合综合模式提出了一套基于响应周期的“链一阶一点一阶一链”的层级往复式计划编制方法,最后分析了该供应链计划实施过程中的运作要点。     

用网络计划技术优化企业生产计划问题

应用网络计划技术对杭州开关厂在生产计划控制中存在的实际问题进行了深入的研究。在充分剖析理论的基础上，结合实际工作情况，对大型机电一体化设备CTH500kW中频加热机的生产技术准备工作进行了网络计划的编制。其中有工程分解的“条块”结合、工序编码系统、资源优化与时间优化的兼容等，取得了良好的成果。     

物资计划流程管理的精细化探讨

物资计划管理是物资供应管理的基础和前提,物资计划精细化管理的目标是落实管理责任,将物资计划管理责任具体化、明确化,它要求每一个参与者都要尽职尽责。物资计划精细管理的本质意义就在于它是对物资计划整个流程的分解细化和实施,是让企业的物资计划的每位参与人员明确职责,使物资计划每个环节都能够合理、顺畅,同时也是提升企业整体物资供应管理的一个重要途径。在确定物资计划精细化管理的思路后,查摆物资计划关键问题、薄弱环节,并进行系统整改、完善,只有这样才能最终实现物资计划精细化管理在企业物资供应中的功效。     

支持供应链管理的计划理论与运行模式

分析了企业计划控制系统的组织模式与运行特征,提出企业应改变职能式的计划管理模式,实行面向供应链过程的集成式计划管理,变生产计划为供应计划,变反馈式控制为适时或前馈控制。并分析了供应链管理环境下计划系统的基本功能。     

以计划网络为基础的MRP算法研究及实现

针对复杂产品制造企业应用常规MRP算法编制的生产计划存在有效性差、调整频繁、重复计算量大等问题,提出了一种以计划网络为基础的MRP算法.该算法是在常规MRP算法的基础上,将运算产生的多级需求计划指令与生产实际安排建立关联关系,应用网络计划技术构建零组件计划网络,增强和扩展了MRP功能,提高了需求计划指令的有效性,并在原型系统开发中得到可行性验证.     

虚拟企业任务订单的跟踪

先介绍了网络组织的4种协调模式，指出虚拟企业适用于分权度较大的协调模式，并构造了在允许个体企业接市场订单的某种协调模式下的虚拟企业ERP的计划层次体系。着眼于新环境下虚拟企业生产计划与控制要求计划共享的新需要，揭示了在MRP处理过程中区分定单不同来源的必要性，为任务订单的跟踪作好了理论铺设，最后将面向订单的方法扩充到了CRP中，并实现了在该CERP计划层次体系下的任务订单的跟踪。     

水利水电工程网络进度计划标准化系统研发

水利水电工程网络进度计划是施工组织设计的重要组成部分。针对目前大多数网络进度计划软件在进度计划生成、分析等方面提供的功能有限,使得网络进度计划编制费时、费力,效率不高,且标准化程度不高等问题,本文在分析了水利水电工程网络进度计划标准化内涵的基础上,对网络进度计划标准化的基本内容进行了研究;在此基础上设计开发了水利水电工程网络进度计划标准化系统,详细介绍了网络进度计划辅助生成、分析、评价与审阅,以及成果输出等功能。该系统不仅界面友好、直观可视化,而且提供了强大的计算及优化功能,大大提高了工程人员网络进度计划编制的效率和质量,为网络进度计划快速分析和优化提供了一种新的思路和手段。     

Insertion of triangulated surfaces into a meccano tetrahedral discretization by means of mesh refinement and optimization procedures

In this paper, we present a new method for inserting several triangulated surfaces into an existing tetrahedral mesh generated by the meccano method. The result is a conformal mesh where each inserted surface is approximated by a set of faces of the final tetrahedral mesh. First, the tetrahedral mesh is refined around the inserted surfaces to capture their geometric features. Second, each immersed surface is approximated by a set of faces from the tetrahedral mesh. Third, following a novel approach, the nodes of the approximated surfaces are mapped to the corresponding immersed surface. Fourth, we untangle and smooth the mesh by optimizing a regularized shape distortion measure for tetrahedral elements in which we move all the nodes of the mesh, restricting the movement of the edge and surface nodes along the corresponding entity they belong to. The refining process allows approximating the immersed surface for any initial meccano tetrahedral mesh. Moreover, the proposed projection method avoids computational expensive geometric projections. Finally, the applied simultaneous untangling and smoothing process delivers a high‐quality mesh and ensures that the immersed surfaces are interpolated. Several examples are presented to assess the properties of the proposed method.     

Certification Institutions Expected to Update and Transfer Information on Present Standards

Standards are the basis for production enterprises to organize production, ex-factory inspection, trade (delivery) and technical exchanges, product certification, quality arbitration and supervision.……     

Flow calorimeter for enthalpy increment measurements on condensed gases

A flow calorimeter for enthalpy increment measurements on condensed gases is presented. A better knowledge of the properties of the liquefied natural gas is needed, and therefore a liquid loop has been designed for our flow calorimeter. The fluid loop in the calorimeter is designed in order to avoid the two-phase region, since two phases would give compositional disturbances in the measurements. The avoidance of the two-phase region is made possible by increasing the pressure of the test fluid after the measurement section, then heating the fluid at super-critical pressure past the critical point. Finally, the fluid is throttled to the low-pressure gas state at the inlet condition of the compressor that circulates the fluid. To perform the pressure increase, a new cryogenic pump has been designed. To evaluate the new equipment, measurements were taken on liquid ethane over the temperature range 146–256 K at pressure between 0.9 and 5.1 MPa.     

Refrigerators Enter a New Era of Health Preservation Frestech initiates the establishment of China's first standard for household sterilization refrigerators

On November 30, 2007, the China Association for Standardization (CAS) held a press conference at Beijing Diaoyutai State Guest House. Leaders from the China Household Electric Appliance Research Institute, the China Household Electric Appliance Association, and the China Consumers' Association attended and made speeches.……     

Optimum-Simulation von Ernteprozessen

Zusammenfassung Bei der Gestaltung von Ernteprozessen — beispielsweise des Prozesses Mähdrusch, Körnertransport und -abnahme — als transportverbundene Fließarbeitsverfahren mit mindestens zwei verschiedenen Arbeitsmitteln gibt es einen großen Optimierungsspielraum. Solche Prozesse sind mehrstufige Bedienungsprozesse mit gemischter Anordnung der Bedienungseinrichtungen. Außerdem besitzen sie stark ausgeprägte räumliche Aspekte. Es wird vor allem gezeigt, welche Merkmale solcher Prozesse in Simulationsmodellen abgebildet sein müssen, welche Zielgrößen in Abhängigkeit von welchen Einflußgrößen unter Berücksichtigung welcher Prozeßbedingungen ermittelt werden sollten und wie der Bewertungsprozeß zur Ermittlung der gewünschten Informationen gestaltet werden muß.     

A study of centrifugal cast high boron high speed steel

In the present study a high‐boron high speed steel (HSS) roll material was designed. Many expensive alloy elements have been substituted by cheap boron alloy, and high‐boron high speed steel roll has been manufactured by centrifugal casting method. The microstructures, mechanical properties and wear resistance of centrifugal casting high‐boron high speed steel roll have been investigated by optical microscopy (OM), scanning electron microscopy (SEM), and X‐ray diffraction (XRD) analysis, hardness test, impact test and wear test. The results indicated that the solidification microstructures of high‐boron high speed steel roll consisted of M₂(B,C), (W,Mo)₂(B,C), M₃(B,C), M₂₃(B,C)₆ type borocarbides and martensite, a small amount of retained austenite. Borocarbides were continuously distributed over the grain boundary. After quenching from 1050 °C, local broken network appeared in partial borocarbides, and fine secondary borocarbide precipitated from the matrix. After tempering from 525 °C, the amount of precipitated borocarbide increased significantly. After heat treatment, the hardness of high‐boron high speed steel roll excelled 60 HRC, and its impact toughness excelled 8.0 J/cm². The single groove steel rolling amount of high‐boron high speed steel rolls increases by 500% than that of bainite cast iron roll, when the rolls are used in K₁ mill housing of bar mill.     

Thixotropy of Systems with Shear Thinning and Plastic Flow Behavior

The definition of the thixotropy is a decrease in viscosity with time in shear and a subsequent recovery of viscosity after the shear deformation is removed.We ...     

Brainstorming for ISO Strategy 2016-2020

正Responding to ISO’s appeal for survey for the to-be-developed ISO Strategy Plan for 2016-2020,SAC hosted a special workshop over the needs and comments of various fi elds on June 8 in Beijing.The workshop was attended by ISO President-elect and Ansteel General Manager Zhang Xiaogang,SAC Vice-Administrator Yu Xinli,and 30 experts from     

CNAS Passes APLAC's PTP Review

正The review group of Asia Pacific Laboratory Accreditation Cooperation(APLAC)carried out a 4-day peer review of the proficiency testing provider(PTP)for China National Accreditation Service for Conformity Assessment(CNAS)from July 28 to 31,2014.CNAS passed the PTP review with excellent performance.Two senior peer reviewers of APLAC made a comprehensive,rigorous and detailed review of CNAS’s PTP accreditation activities,and made the on-spot inspection of the review groups in Shanghai and Shenzhen respectively.