The extended enterprise-a context for manufacturing

Today's manufacturing enterprises face tremendous competitive pressures. Global competition, together with market demands for customized products delivered just in time, place tremendous pressures on manufacturers. The emerging global economy is rapidly replacing local markets. The emergence of open markets, reductions in trade barriers, and improvements in transportation and communications links have led to a situation where local competition and markets operate in the context of global standards. This open infrastructure allows manufacturers to respond to these challenges by working more closely with their suppliers and customers, and by building extended enterprises across the whole value chain. Such extended enterprises present great challenges in terms of redesigning business processes to create a competitive advantage from the linkages they include. This paper describes the manufacturing philosophies currently in vogue. Any manufacturing or related business will need to use them, albeit tailored to its own circumstances, in one form or the other, to ensure its prosperity.     

风险偏好与属性约简在决策问题中的应用研究

将决策者风险偏好与属性约简算法应用到具有大量属性的决策问题,提出先对决策者分类再进行决策的策略． 根据决策者的风险偏好特征将其分为风险规避型、风险中立型、风险偏好型,针对不同类型的决策者分别采取相应的算法,提取有效属性并利用有效属性进行决策; 针对不同风险偏好的决策者,提出相应的风险偏好预期规则; 提出基于优势关系辨析矩阵的属性赋权算法及基于属性值优势度矩阵的进行信息融合与排序算法; 最后通过属性值为实数与区间数的两个实际案例表明该算法的科学合理性．     

基于线性矩阵不等式的牵制控制策略分析

研究复杂动力学网络的同步牵制控制问题.通过引入牵制控制,对具有大规模节点网络中的小部分节点实施线性反馈控制策略,使得整个网络的所有节点均达到同步.针对一类一致连结的耦合复杂网络模型,采用线性矩阵不等式的方法给出了实施牵制控制达到同步的充分条件.该条件表明,选择牵制异质网络中度较大的节点可能更容易使得网络实现同步.特别地,对于特定的内部耦合矩阵和足够大的耦合强度,只要对网络中任一节点实施牵制控制就可以保证整个网络同步的实现.数值仿真验证了上述结论的有效性.     

A study of BIB designs through support matrices

This paper deals with the existence and nonexistence of BIB designs with repeated blocks. The approach is an algebraic one. The concept of a support matrix is introduced and some of its basic properties are noted. Some basic examples of support matrices are given when the block size is 3. The connection between full column rank proper support matrices and irreducible designs is explored and some examples of such matrices are given.     

AN ALGORITHMIC APPROACH TO BAYESIAN LINEAR MODEL CALCULATIONS

A framework is described for organizing and understanding the computations necessary to obtain the posterior mean of a vector of linear effects in a normal linear model, conditional on the parameters that determine covariance structure. The approach has two major uses; firstly, as a pedagogical tool in the derivation of formulae, and secondly, as a practical tool for developing computational strategies without needing complicated matrix formulae that are often unwieldy in complex hierarchical models. The proposed technique is based upon symbolic application of the sweep operator SWP to an appropriate tableau of means and covariances. The method is illustrated with standard linear model specifications, including the so-called mixed model, with both fixed and random effects.     

二次型与(半)稳定矩阵的判定

对二次型与（半）稳定矩阵之间的相互关系进行了讨论，得到了二者之间的相互判定方法，且利用二次型的不同配方法得到判定（半）稳定矩阵的一些条件     

开放微带不连续电路的三端口网络描述

给出了开放微带不连续电路的三端口网络描述。将微带电路向空间的辐射作为一个端口来处理，成功地消除了由于忽略电路的空间辐射效应引入的电路数字模拟误差。利用时域有限差分法（ＦＤＴＤ）一次运算就可得出三端口网络的Ｓ参数矩阵的各元素，而无需任何预处理，大大地节省了ＣＰＵ时间。实际计算与已发表的数据吻合得很好，表明文中给出的三端口定义是合理有效的。此三端口微带电路的定义可容易地推广到其他非屏蔽传输线电路的分析，可广泛用于电磁兼容分析、微带天线及其他开放传输线电路的ＣＡＤ技术中。     

Minkowski 不等式的进一步拓广

将正定（实对称）阵的Ｍｉｎｋｏｗｓｋｉ不等式拓广到更一般的一类矩阵，推广和改进了有关文献的结果．     

非负矩阵谱半径的估计

对非负矩阵谱半径的界值给出了一个新的估计.并引进某些自由参数,使谱半径得到了更一般的结果。     

Suitable Algorithm Associated with a Parameterization for the Three-Parameter Log-Normal Distribution

Associated with a parameterization for the three-parameter lognormal distribution, an algorithm was proposed by Komori and Hirose, which can find a local maximum likelihood (ML) estimate surely if it exists. Nevertheless, by Vera and Díaz-García it was shown that performance in finding a local ML estimate deteriorated by adopting the parameterization only and using other algorithm. In the present article, it will be shown that Komori and Hirose’s algorithm should be used for the parameterization. This work will also give MATLAB codes as a useful tool for the parameter estimation of the distribution.