供应链上企业间协同谈判模型和原型研究

本文对面向业务流程集成的协同谈判进行研究。这种新的谈判模式的特点是通过约束传播与约束放松来调整谈判各方的利益,达到共赢。本文建立了协同谈判中多线程间的状态机谈判协议,提出了多线程间基于域传播算法的协同谈判策略和谈判模型,并通过研制原型系统进行实验,证实了本文所提出的协同谈判理论和方法的正确性。本文提出的协同谈判模型可以解决供应链上企业同时与多个上、下游企业的谈判问题,可通过改变业务流程,使供应链上的企业达到双赢,提高谈判的效率。     

基于集成支持向量机的企业财务业绩分类模型研究

要想正确预测公司财务业绩,首先必须选择合适的预测方法。现有文献所采用的财务业绩预测模型普遍存在着泛化能力不强的问题。本文提出用支持向量机方法来预测我国上市公司的财务业绩。为了提高预测准确率,本文还用AdaBoost算法对支持向量机进行了改进(集成支持向量机)。在支持向量机核函数的选择上,我们采用了实验法,即对每个核函数及其相关参数的预测效果都进行了测算,以期找出最适用的预测模型。实证结果表明,径向基核函数(rbf)的效果最好,支持向量机方法预测准确率远远高于其它方法。     

A generalized procedure for minimizing makespan in a CNC environment

This paper presents the problem of scheduling N jobs, each manufactured in a number of settings, in order, on a CNC machine equipped with an automatic tool changer. A generalized procedure to minimize makespan in a CNC environment has been developed and tested on real industrial problems, considering possible constraints. It is worthy of mention that the procedure suggested finds an optimal solution of the problem discussed by Sule in a short and simplified manner. The step-by-step analysis shows the simplicity and flexibility of the proposed approach.     

Scheduling of unrelated parallel machines when machine availability is specified

Scheduling problems typically assume uninterrupted availability of machines such that jobs can be processed at any time during this uninterrupted period. However, this assumption is seldom valid in reality. For a variety of reasons, e.g. machine adjustments, shift changes, planned maintenance, etc. machines are available only at specified times. The duration for which the machine is not available is known as the vacation. This paper considers the problem of scheduling jobs on unrelated parallel machines when machine vacations are specified. Two cases are considered, first, when the machine vacations are known apriori, and the second, when these constraints are not known apriori. Algorithms have been developed for both models, and computational results are also reported.     

Supplier involvement in integrated product development: evidence from a group of Italian SMEs

Integrated product development (IPD) is gaining increased attention from practitioners and the academic community as a source of innovation and competitive advantage. However undeniable the importance of the issue is as to how the different actors involved in the process interact among themselves and the supporting factors not being well understood even in the SME context, the availability of empirical research and a comprehensive framework to drive this research remains unavailable. This article contributes to these research gaps by providing theoretical and empirical findings. First, a research framework on IPD is identified. The proposed framework represents a conceptualisation of IPD principles as consisting of three groups of integration enablers, which aim to achieve high internal (among departments) and external (with suppliers and customers) integration: (a) organisational enablers, (b) technological enablers and (c) methodologies. Then, a multiple case study approach is used in order to empirically explore external integration with suppliers in product development in 22 SMEs from the machine tool sector.     

当代工笔画中女性服饰的表现研究

描绘女性形象的工笔人物画称之为仕女画，从传统仕女画女性服饰样式着手，尝试通过对不同时期工笔画中女性服饰进行分析和比较，梳理出传统工笔人物画女性服饰概况。通过现当代工笔人物画中女性服饰的表现形式，探求其蕴含的艺术意识。     

基于有限元技术的锅炉水冷壁焊机关键部件研究

针对锅炉水冷壁焊机受力较大容易导致整机强度不够的问题,提出了锅炉水冷壁焊机机架的有限元分析方法。对危险横梁进行了详细的静态有限元数值分析,得到整体结构变形、等效应力云图和部分方向位移图。提出五种结构优化的方案,并进行了仿真分析,最终确定将横梁左右两侧改成封闭式结构这一最优方案。利用该方法设计制造锅炉水冷壁焊机样机,经实际生产运行满足企业要求。     

基于非线性分位数回归模型的多期VaR风险测度

多期VaR主要受到持有期及波动率两个变量的影响,并且其影响模式(线性或非线性)的确定对于准确地进行VaR风险测度至关重要。非线性分位数回归模型,能够克服线性分位数回归模型只能揭示多期VaR及其影响因素之间线性依赖关系的局限,从而提高多期VaR风险测度的准确性。结合波动模型与两个非线性分位数回归方法:QRNN和SVQR,给出了多期VaR风险测度的三类方案:波动模型法、QRNN+波动模型法、SVQR+波动模型法。选取3个股票价格指数作为研究对象,考虑了6种不同形式的波动模型,得到了18个多期VaR风险测度方法进行实证比较,结果表明:波动模型选择影响到多期VaR风险测度效果;SVQR+波动模型法略优于QRNN+波动模型法,并且两者显著优于波动模型法。     

预知两种信息带准备时间的平行机半在线排序

本文研究了P2,rj/sum & max/Cmax问题,即预知所有工件加工时间总和sum和最大工件加工时间max的两台处理器的带准备时间的半在线问题,并给出了竞争比为6/5的最优半在线算法.     

辽中南城市群服装产业现状与发展策略

辽宁省是全国服装生产过亿的省份之一。但是,目前辽中南城市群服装产业与南方沿海相比还处于"幼稚"阶段,各服装企业之间的竞争还停留在低附加值加工模式中。文中结合对辽中南地区部分城市服装企业的问卷调查、走访调研,分析了辽中南城市群服装产业发展的突出问题,提出了衡量服装产业竞争力强弱的一项重要指标,是否拥有一批在全国叫得响的"品牌群体"。辽中南城市群服装企业以加工和贴牌出口为主,服装企业要迅速提高对新技术、新的管理方式、新的经营理念和现代化生产设备引进的认识,在人才引进、技术改造和创新、管理模式和市场经营等方面加大投入,着重在经营模式、品牌附加值、服装纺织产业链等几方面寻求发展和突破。