按件供应模式应用研究

对进口件（即KD件）按件供应与成组供应模式进行了对比分析，结合按件供应在启动、运行期间的工作特点，对神龙公司按件供应管理模式进行了分析和探讨，分析了KD件按件供应中MRPⅡ与JIT的结合应用以及按件供应模式的信息组织方式，提出了缩短订货期、降低库存、提高市场需求响应度的具体建议，并在实际运用中取得了显著的经济效益和管理效应。     

基于OPERA浏览器的手机订货方式

手机订货目前较为通用的解决方案有3种,分别为STK技术、手机网站、客户端软件。这三种解决方案各有长短。从温州烟草手机订货项目的实践出发,阐述一种基于OPERA浏览器的手机订货方式。该方式立足于手机网站,但可以解决目前大部分手机浏览器不支持Java Script脚本的问题,扫除手机订货终端硬件适配性差的障碍,最终实现减少操作步骤、提高订货效率的目的。     

进口汽车零件订货组合策略管理研究

分析了国内汽车生产企业进口零件散件成组供应与按件供应的差异,研究了进口汽车零件采购组合的管理策略,总结了成组供应向按件供应演变的条件,并根据实际经验提出了成组供应向按件供应过渡的模块供应方式。     

基于供应商服务水平的订货时机Pareto分析

由于从服务水平角度来分析订货时机的文献很少,本文基于报童模型,在单供应商和单零售商组成的供应链系统中,分析了服务水平对双方订货时机偏好的影响,并根据博弈分析,按照供应商服务水平划分了订货时机Pareto最优区域。研究结果表明,当供应商服务水平较低时,预先订货对零售商有利;否则,延迟订货对零售商更有利。研究还显示,通常情况下供应商偏爱零售商预订,这和现实情况是吻合的。     

浅谈物资订货合同管理

本文讨论物资订货合同的管理方式。     

零售商风险厌恶下的订货时机分析

由一个风险厌恶型零售商和一个风险中性制造商组成的供应链中,分析了供应链三种订货时机:预先订货、延迟订货、柔性订货,结果显示供应链将处于制造商不偏好的订货时机;调查了零售商风险厌恶对制造商的影响,发现在一定条件下零售商将削减订货量至少一半,制造商利润将减少至少一半;设计了利润保证契约这一供应链协调机制,发现通过该契约,制造商生产量将提高到原来的两倍以上,还对该契约的实施条件进行了全面分析。     

制造商回购转运和加急生产协调策略

针对由单一制造商和两个竞争性零售商组成的供应链系统,研究回购契约下,制造商分别提供一次订货和两次订货机会时,两零售商的最优订货决策和制造商的最优回购转运和加急生产策略问题,并建立了相应的决策模型。通过对模型的分析,给出了在2种情形下,制造商和两零售商的最优决策。对比研究发现,在回购契约下,当满足一定参数关系时,制造商允许零售商二次订货,并采用转运和加急生产策略时,供应链各主体的利润相对仅提供一次订货机会时能得到更明显的改善,供应链整体利润获得进一步提高,供应链实现更优协调。     

连锁经营企业集中订货与支援调拨策略及模型

根据连锁经营企业的特点,提出了各分店和配送中心集中订货和相互之间在商品上的支援调拨策略。在理论上证明了集中订货和支援调拨策略可以降低总体订货量,通过模拟实验验证了该策略能够降低总体订货量的波动。建立了集中订货和支援调拨策略的数学模型。使用实际案例验证了该策略和模型能够带来显著的订货和库存量的下降和服务水平的提高。     

钢铁企业订货系统建模与仿真分析

订货模型存在于大多数的公司中,用以根据销售情况组织公司生产.供应链中的企业大多数是根据销售组织生产的,企业中的订货模型尤为重要.以钢铁企业分销商订货模型为例,运用系统动力学方法分析了该订货模型,并对现实情况进行了仿真分析,提出了钢铁企业分销商订货策略.     

零售商风险态度对其订货决策影响的实验研究

考虑存在利好和不利因素的情景下,供应链中零售商的风险态度对其订货决策的影响。首先通过设计风险量表区分出被试的风险态度;其次设计存在利好和不利情景的供应链模拟实验,分别让风险偏好及风险规避的被试扮演零售商;最后,通过对比零售商的订货决策指标,研究零售商的风险态度对其订货决策的影响。研究结果表明:利好情境下,规避者倾向于多订货,不利情境下,偏好者倾向于多订货。对个别零售商来说,在进行订货决策时,存在风险偏好逆转现象,且偏好者向规避逆转的情况较为普遍。     

基于AR技术的广府家具“纸上博物馆”设计应用与研究

目的研究基于AR技术的广府家具数字化传承的设计与应用实例。方法采用Unity3D作为主要的开发工具,以C#语言工具为主,结合Vuforia AR开发者工具包为辅,调用Android开发对应的API,集成开发环境,同时运用第三方内容设计工具PS、AI、3Ds Max和Maya为主要的数字化内容设计与创作工具,将广府家具纸本书籍与APP结合。结果设计出可交互体验的全媒体出版物,即"纸上博物馆"。结论 AR技术支持人与物交互,不仅给非物质文化遗产的传承提供更多的可能性,更是人与历史之间对话的一种手段。利用新的传承手段对广府家具文化进行数字化保护,能够促进广府家具作为文化遗产在新时代的展示、传播和发展。     

Effect of Elastic Energy due to Atomic Size Factor on Ordering and Decomposition Behaviour of Binary Solid Solutions

A theory recently developed by the present authors is applied to the study of the effect of elastic energy due to atomic size factor on the transformation behaviour of binary solid solutions. lt is found that elastic interaction energy (EIE), which is a part of the total elastic energy plays a key role in both ordering elastic interaction ordering (EIO) and spinodal decomposition. The present study gives a reasonable explanation to the historical dilemmas, "elastic energy paradox" and "atomic size factor paradox . By solving these confusing problems, the coexistence of ordering (EIO) and decomposition, which has been regarded as impossible by conventional theories. can be well understood. The mechanism is as follows: lowering of elastic energy demands EIO, and such an ordering provides a driving force for spinodal decomposition. Therefore, in alloys with large atomic size factor, spinodal decomposition is preceded and induced by ordering. Ordering and spinodal decomposition are thus closely related processes to each other     

Investigation of short range ordering in polymers by means of radial distribution functions derived from X-ray diffraction

Two samples of bisphenol-A polycarbonate, showing marked differences in impact behaviour due to different thermal histories, were investigated by radial distribution function (RDF) methods. The RDF patterns were virtually identical and showed that the short range order (0 to 10 Å) in the samples had been essentially unaffected by the annealing procedures. Most of the intra-molecular distances in the polymer repeat unit were successfully resolved in the RDF pattern. However, there were only suggestions of broad peaks at r 5.5 Å and r 10 Å attributable to intermolecular ordering, indicating that little intermolecular ordering had occurred in either sample. Explanations of the different impact properties of the two samples which assume a significant short range re-ordering on annealing are thus ruled out on the available evidence.A more highly annealed sample was examined to assess the sensitivity of the RDF method to short range intermolecular ordering. The RDF plot of this sample showed a marked periodicity peaking at intervals of 5.5 Å which was attributed to intermolecular ordering, thus confirming the above conclusion.     

On short range ordering in the perovskite lead magnesium niobate

The structural ordering characteristics of lead magnesium niobate (PMN) and solid solutions (PMN-PT) of PMN with lead titanate have been investigated using transmission electron microscopy (TEM). It is proposed that short range, non-stoichiometric 11 ordering of the Mg and Nb cations on an F-centred superlattice generates space charges which dominate the kinetics of the ordering process and inhibit the development of long-range order. Furthermore, it is demonstrated that by introducing off-valent La³⁺ ions on to the A-site sublattice, the local charges can be at least partially-compensated and an increase in the extent of structural ordering is consequently observed.     

基于NTN校准技术的脉冲标准法

脉冲标准法是校准宽带取样示波器的一种行之有效的方法,但它需要波形参数已知的脉冲信号源,当取样示波器的带宽很宽时,这种脉冲信号源是很难得到的。近年来发展起来的NTN校准技术可以不受带宽的限制,但是它只限于对某些结构的取样示波器的校准。提出了一种基于NTN校准技术的脉冲标准法,该法克服了上述限制,可以实现更多种类的宽带取样示波器的校准。实验结果表明,该方法是非常有效的。     

"Iron-Deficient" YIG?

In a recent letter to this TRANSACTIONS [1], Guyot, Cagan, and Merceron claim to have measured the initial permeabilities, at different constant temperatures, as a function of frequency, of "iron-deficient" yttrium iron garnet (YIG). They attribute the nature of their results to the presence of Fe⁴⁺ions in their samples, which provide a means of valency interaction. The method of preparation of the polycrystalline material on which these measurements were made is given in another letter [2] by the same authors. This author wishes to point out that this method, taken at face value, will not produce the material they claim. In fact, it is very unlikely that an "iron-deficient" YIG, which might be written Y3Fe5-δO12, with measurable δ, can be produced at all.     

“激情”意象的设计解读

目的 通过对“激情”意象的研究和梳理,提出激情意象设计的层次架构,并就层次中的关键技术展开研究,探索通过设计实现“激情”意象的路径和方法,提炼“激情”意象设计的关键词。方法 通过文献法展开对“激情”多角度、多层次的解读,全面认知“激情”的内在关系与表现形式;通过对意象设计层次和方法的探讨梳理出“激情设计”的关键词和设计方法。结论 通过对激情意象的深度解析初步构建了“激情”意象设计的层次架构并梳理了设计关键词,对指导设计师进行“激情”意象设计有一定的启发并对其它意象设计有一定的借鉴意义。     

Experimental studies of hydrogen on boron nitride: II. NMR studies of orientational ordering of H2

We report the results of NMR studies of thin films of hydrogen adsorbed on hexagonal boron nitride. Orientational ordering is observed below 1 K but the ordering is not complete, and a clear two-component ordering is observed. Molecules are either (i) almost completely ordered with local order parameters = 1 – 3/2Jz ² clustered close to a maximum value of a 0.94 (comparable to the values for long range ordering in bulk samples at high ortho concentrations), and (ii) a large fraction of the molecules that remain nearly disordered with 0.25. The degree of Orientational ordering depends on the number of hydrogen layers and on the ortho-hydrogen concentration, and these studies indicate that ordering occurs principally in the first four layers closest to the substrate, with weaker Orientational ordering in the outer layers near the free surface even at temperatures as low as 210 mK.     

基于“风险源+承灾体+减灾体”的城市安全表征“库-网-流-谱-法”理论框架

我国的城市安全面临自然灾害、事故灾难等多种重大挑战。针对城市安全现阶段的实际需求与重要难题,该研究引入“减灾体”和“减灾力”的概念,以风险源、承灾体和减灾体为三大基本要素,依托数字孪生、机器学习、知识图谱等新技术,建立了基于“风险源+承灾体+减灾体”的城市安全表征“库-网-流-谱-法”理论框架,并对该框架中每个环节涉及的研究内容与关键问题进行了详细阐述。所提出的理论有望更加合理地表征城市的管理能力在城市安全中的作用,助力实现城市安全性态的动态表征以及相关决策的智能学习与优化。     

An exact formula for "Tooth-to-Tooth" permeance

We present a new, completely original exact method to determine the permeance between two opposing iron teeth. This configuration is important because it is often encountered in electrical machines and apparatus. The method is based on conformal mapping. The given "tooth-to-tooth" configuration is mapped into a simpler one, in which the same permeance can be analytically determined. We derive an explicit formula for this permeance, and confirm our results using the finite-element method.