我国服装企业供应链模式下的库存管理策略研究

本文研究了我国服装企业在供应链模式下的库存问题,并提出管理策略.以服装行业的经营与库存特点为依据,分析在供应链模式下服装企业通常采取的库存管理的策略及其优缺点.结合供应链管理中较为先进和适用的思想,给出服装企业在供应链管理模式下的库存管理策略的几点建议,可作为服装企业进行科学库存管理的依据.     

广东省婴童服装产品质量安全风险分析

婴幼儿及儿童安全意识差,容易受到产品伤害.本文在对近年广东婴童服装产品抽查结果的基础上,分析了广东婴童服装产品质量安全风险状况,并提出了启动婴童服装风险监测工作等建议.     

三维人体扫描技术在服装产品设计中的应用

目的为适应数字经济下服装产品设计领域的转型发展需求,探讨三维人体扫描技术在现代服装产品设计开发中的应用,为新型服装产品设计模式提供思维方向。方法分析目前三维人体扫描技术的现状,实验和筛选三维扫描的方法并快速获取人体模型数据样本。在此基础上,依据服装产品设计过程展开分析,结合实际应用案例,探讨基于三维人体扫描技术获取的人体模型数据在服装产品设计中的应用与价值。结论通过三维人体扫描技术可以快速获取丰富准确的三维人体模型数据,根据设计需求将数据接入服装产品设计和展演系统中,辅助企业与设计师提高服装产品的合体性与舒适度,提升以消费者为中心的个性化服装产品定制服务的满意度,驱动服装产品设计领域的智能化、数据化和信息化发展。     

我国食品冷藏链的发展与对策

介绍了食品冷藏链的基本概念和基本特点,分析了冷藏链的相关技术和我国食品冷藏链的现状,并在国外冷藏链比较的基础上,提出了发展我国食品冷藏链的对策和措施.     

基于失效概率积分和马尔可夫链模拟的可靠性灵敏度分析

可靠性灵敏度可以被表达为失效概率对基本随机变量分布参数的偏导数的形式,利用失效概率为基本变量的联合概率密度函数在失效域上的积分表达式,并且利用马尔可夫链能够高效模拟感兴趣区域样本的性质,一种针对单个失效模式和系统多个失效模式的可靠性灵敏度分析方法被提出。由于可靠性参数灵敏度可以表达为一个与联合概率密度函数相关的函数在失效域中的数学期望的形式,所提方法采用马尔可夫链来高效模拟失效域中的样本,进而采用样本均值替代总体均值的方法来得到可靠性灵敏度的估计值。与已有的基于Monte-Carlo模拟的可靠性灵敏度分析方法相比,所提方法在保证计算精度的基础上计算效率有显著提高,尤其是针对小失效概率的可靠性灵敏度分析问题。该算例充分说明了所提方法的合理可行性。     

供需链管理的运作模式研究

信息技术的发展使动态供需链的实现成为可能,在前者的支持下,供需链管理的模式可以按照运作中心的不同分为以分销商为核心的供需链、以制造商为核心的供需链和以拍卖商为核心的供需链三种模式,分析了在三种模式下的供需链的流程,并针对供需链不同的生命周期分析了供需链的功能,最后对供需链管理信息系统的实现进行了讨论。     

冷藏链现状及进展

冷藏链系统是保证易腐产品质量最重要的保障技术措施.通过分析国内蔬菜、水果、肉产品、水产品、冷饮等易腐产品的市场发展趋势,指出发展冷藏链技术是保证我国易腐产品可持续发展的重要保障.在这基础上,从冷藏链流程上分析了国内冷藏链关键技术的现状和不足,包括预冷技术、冷藏运输技术、冷藏库技术及冷藏链末端技术.最后对国内发展冷藏链技术的方向进行了阐述,包括冰温技术、无线信息管理技术.这些工作将为发展和健全我国冷藏链系统起指导作用.     

滚子链低噪声试验与研究

作者从噪声对人体与环境的危害入手,为降低链传动噪声,设计出了低噪声滚子链条.为研究低噪声滚子链降噪性能,特对同等规格普通滚子链与低噪声滚子链做噪声对比试验,并对试验结果进行了分析与评价.经权威噪声检测机构检测表明:低噪声滚子链较普通滚子链在中高速时降噪8～10dB.     

服装CAD样板数据交换文件标准化研究

针对不同服装CAD系统间数据交换兼容性差的问题,对数据交换文件的标准化问题进行了研究.分析了服装CAD样板数据交换的现状和服装样板的组成,提出了一种基于二进制的服装样板交换文件结构的标准方案.在吸收现有样板文件结构优点的基础上,定义了3种基本数据类型、9种实体类型,并设计了样板交换文件的结构.此结构专业性强、精度高、读写转换方便、可存储图形与非图形信息,可满足数据交换的需要.     

我国生态纺织品认证种类及发展方向

"生态纺织品"是指从原料到成品的整个生产加工链中,不存在对人类和动植物产生危害的污染;服装不能含有对人体产生危害的物质或不超过一定的极限;服装不能含有对人体健康有害的中间体物质;洗涤服装不得对环境造成污染等.另外,它还应该经过权威检测、认证,并加贴了相应的标志.     

Quantitative characterization of the limiting resolution of a microscanning imager

A method to determine the limiting resolution of a microscanning imager is proposed. Specifically, both the sample-scene phase effects and aliasing effects due to microscanning are modeled in this method by combining the pixel transfer function and the squeeze modulation transfer function. Further, this model is used to calculate the amount of improvement from typical microscanning modes to the limiting resolution of the imager focusing on various blur factors. Analytical results show that the limiting resolution of the microscanning imager is closely related to microscanning modes. The amount of improvement from different microscanning modes to the limiting resolution is different and is closely associated with the fill factor and the blur factors. The conclusion obtained will be helpful in choosing the optimum microscanning mode according to the fill factor of the detector and system blur factors.     

随机弹性需求下的再制造闭环供应链的协调机制研究

在价格敏感型随机需求的闭环供应链中,分析了以制造商为Stackelberg领导的集中式决策与3种分散式回收模式（制造商回收、零售商回收和第三方回收）下的定价策略和系统利润。首先从集中式决策出发得到闭环供应链协调的一阶必要条件,在分散决策中证明了完全退货与回馈惩罚混合契约能使分散式闭环供应链达到完美协调,实现供应链成员的共赢,通过协调时利润的比较表明制造商不会选择第三方回收模式,最后证明了协调的充分性和有效性,并给出了一个算例验证了上述结论。     

基于调频EMD的结构非线性辨识方法研究

提出了调频EMD方法,克服了原EMD方法在密集频率情况下容易产生固有模式函数(Intrinsic Mode Function,IMF)混淆的弱点,可以较好地分解相对密集频率的弱非线性信号,得到物理意义相对明确的IMF。与Hilbert-Huang变换相结合,有效地识别多自由度弱非线性系统瞬时模态信息的变化过程。通过数值仿真计算证明了调频EMD方法的有效性。利用调频EMD方法对Humber大桥的主梁两自由度节段模型自由气弹振动信号进行识别,揭示了该耦合系统的非线性。     

基于灰熵的冷链生产现场决策评价方法

为了提高果蔬类冷链企业的管理水平和运作效率,构建了冷链生产现场决策评价体系,并给出了各评价指标的量化标准。在此基础上,运用熵增原理和灰色关联分析方法,建立了冷链生产现场灰熵综合评价模型。结合某冷链配送中心现场评价实例说明了其应用,结果表明使用灰熵理论对冷链配送中心的生产现场进行评价决策,能够获得比较理想的评估效果。     

Optimal design methodologies for configuration of supply chains

This paper describes a methodology developed for designing an optimal configuration for a supply chain. A typical configuration for a supply chain consists of defining components of the system, assigning values to characteristics parameters of each component and setting operation policies for governing the interrelationships among these components. As such, each configuration will be defined by a set of values for quantitative parameters of the system as well as a set of policy and qualitative characteristics. Examples of quantitative variable include inventory levels and frequency of ordering where as location of distribution centres and mode of transportation between suppliers and the original equipment manufacturers (OEM) are the decision variables of policy and qualitative nature. The methodology presented here consists of a supply chain model builder coupled with two optimisation algorithms that automatically build a sequence of configurations that systematically move towards an optimum design. A combination of mixed integer programming and a genetic algorithm is used to determine simultaneously the values of quantitative as well as policy variables. The solution consists of strategic decisions regarding facility locations, stocking locations, supplier selection, production policies, production capacities, and transportation modes.     

Technological Knowledge Intensity and Entry Mode Diversity

• This paper expands the entry mode literature by referring to multiple modes exerted simultaneously in different value chain activities within and across host markets, rather than to a single entry mode at the host market level. We apply competing theoretical perspectives—internalization theory and knowledge transfer efficiency considerations on the one hand, and organizational learning theory on the other—to argue that firms’ technological knowledge intensity affect their entry mode diversity across value chain activities, across host markets, and at the overall corporate level.
• Analyzing a unique dataset we show that high technological knowledge intensity is strongly associated with high entry mode diversity across value chain activities and at the corporate level, but only weakly associated with greater entry mode diversity across geographic host markets.

     

Visualizing Plasmon Coupling in Closely Spaced Chains of Ag Nanoparticles by Electron Energy‐Loss Spectroscopy

Anisotropic plasmon coupling in closely spaced chains of Ag nanoparticles is visualized using electron energy‐loss spectroscopy in a scanning transmission electron microscope. For dimers as the simplest chain, mapping the plasmon excitations with nanometer spatial resolution and an energy resolution of 0.27 eV intuitively identifies two coupling plasmons. The in‐phase mode redshifts from the ultraviolet region as the interparticle spacing is reduced, reaching the visible range at 2.7 eV. Calculations based on the discrete‐dipole approximation confirm its optical activeness, where the longitudinal direction is constructed as the path for light transportation. Two coupling paths are then observed in an inflexed four‐particle chain.     

Material selection based on ordinal data

Ranking and choosing the best material is one of most important stages in material selection process. Using linear assignment method, the multi-criteria decision making (MCDM) approach is proposed in decision-making process to rank the materials for a given engineering component with respect to several criteria. The proposed material selection procedure is relatively simple, and can be a useful approach when material selection problem includes qualitative properties or user-interaction aspects. The suggested approach also can be use for quantitative properties. Three examples are included to demonstrate the suggested method. Result of proposed approach showed good agreement with other methods.     

Tensile deformation behaviour of high isotactic polypropylenes

Abstract

The tensile flow behaviour and deformation processes during uniaxial loading of high isotactic (high crystallinity) polypropylenes have been investigated at various strain rates. The strain rate sensitivity index indicated that long chain high isotactic (high crystallinity) polypropylene (iPP-L) is relatively less sensitive to strain rate than short chain high isotactic (high crystallinity) polypropylene (iPP-S). Deformation bands formed at low strain contributed to the separation of fibrils/microfibrils, and on subsequent increase in tensile strain, the deformation bands developed into an array of closely spaced crazes that multiplied with an increase in strain and strain rate, and grew inwards. Three fracture morphologies were identified in iPP-L: brittle fracture, crazing - tearing, and brittle fracture with ductile pulling of fibrils/microfibrils (quasi-cleavage). In iPP-S, the predominant mode of failure at all displacement rates was brittle fracture. However, at lower displacement rates, smooth and circular voids associated with nucleating particle were randomly present on the brittle fracture surface of iPP-S. Occasional wedges were also observed on the tensile deformed surface of iPP-S. The deformation processes have been depicted in terms of strain rate - strain deformation diagrams.