3ds max 建模在织物组织结构教学中的应用

本文介绍了利用3ds max建模在织物组织结构教学中的应用特点、优势和对教师的要求,对应该注意的问题也作了说明,同时3ds max织物组织立体建模作了概述。3ds max建模在织物组织结构教学中的应用对织物组织教学提供了新的方法和途径,特别是对于初学织物组织的学生来说,更易理解组织图与组织结构之间的关系。     

Robust min–max portfolio strategies for rival forecast and risk scenarios

We consider an extension of the Markowitz mean–variance optimization framework to multiple return and risk scenarios. It is well known that asset return forecasts and risk estimates are inherently inaccurate. The method proposed provides a means for considering rival representations of the future. The optimal portfolio is computed, simultaneously with the worst case, to take account of all rival scenarios. This is a min-max strategy which is essentially equivalent to a robust pooling of the scenarios. Robustness is ensured by the noninferiority of min–max. For example, a basic worst-case optimal return is guaranteed in view of multiple return scenarios. If robustness happens to have too high a cost, guided by the min–max pooling, it is also possible to explore other pooling alternatives. A min–max algorithm is used to solve the problem and illustrate the robust character of min–max with return and risk scenarios. We study the properties of the min–max risk–return frontier and compare with the potentially suboptimal worst-case where the investment strategy and the worst case are computed separately.     

基于蚁群算法的双线铁路列车运行调整研究

将列车运行调整问题归并为大规模job shop调度问题,借助引入的列车路径矩阵、列车通过顺序矩阵,构建了双线铁路列车运行调整的优化模型。针对模型解空间大、约束条件复杂的特点,提出了先利用蚁群算法优化列车铺画顺序,后运用极大代数法安排列车到发时刻的求解方法。仿真试验表明,算法的效率和稳定性可以很好的满足行车调度指挥的要求。     

改进的Loran-C同步干扰抑制高效自适应算法

针对目前Loran-C系统抑制同步干扰所采用的自适应算法存在运算量大、定位时间长 的缺点,提出了一种改进算法,即BMMax-NLMS算法,并对运算量进行了比较。通过建立Lora n-C信 号模型,运用改进算法对干扰信号进行自适应滤波。仿真结果表明,该算法能够在抑制同步 干扰的同时有效减少运算量。最后,利用实测数据进一步验证了这些结论。     

台湾国际观光饭店网路行销关键影响因素之分析

“我们相信,信息革命与网路空间将会实质性地改变行销的环境,并且在传统价值的过程中,令各厂商的财富重新洗牌”。饭店与台湾观光及商务行为一直都是密不可分的,而在21世纪信息爆炸的时期,饭店应如何顺应网路市场的需求,从中获取潜在顾客,正是现今企业重要的议题;正因为因特网蓬勃发展,网路市场不断成长,产生了许多商业机会与利润,这也是为何现今网路行销成为企业研究重要的课题之一。本研究将以McCarthy以及Philip Kotler所提出的行销组合作为分析架构,并利用网路程序分析法ANP（Analytic Network Process）理论以及专家问卷,分别针对饭店业者、专家学者以及官方代表进行分析,探讨饭店业者经由网路将通过何种因素影响其选择性,并分析其因素比重优先级。经由ANP研究方法不但可清楚地知道其因素权重值,更可作为未来规划饭店网路行销策略时的依据。本研究发现在饭店业者、专家学者与官方代表所注重之因素是有差异的,而在综合三个领域的样本中,构面排序几乎为同等重要、在因素排序相对重要程度中前五名为公共关系——企业形象、人员——专业性、产品——理性型产品、促销——折扣或折让、促销——网路广告。     

On additivity of tail comonotonic risks

ABSTRACT

As perceived from daily experience together with numerous empirical studies, the multivariate risks demonstrate a strong coherence in the extremal dependence structure especially over the course of financial turmoil or industrial accidents and outbreaks. Under this motivating paradigm, we show the universal asymptotic additivity under upper tail comonotonicity, as the probability level approaching to 1, for Value-at-Risk and Conditional Tail Expectation for a portfolio of fixed number of risks, in which each marginal risk could be any one having a finite endpoint or belonging to one of the three max domains of attraction. Our obtained results do not require the tail equivalence assumption as needed in the existing literature. This resolves a lasting problem in quantitative risk management and covers most distributions commonly encountered in practice.     

论“人口红利”衰退及其效应最大化

我们有1／4以上的人均GDP的增长是靠人口年龄结构优势获得的。但2010年比以往更加突出的用工荒现象却使得专家们纷纷发出“刘易斯拐点”的警告，无论刘易斯拐点是否已经到来，我国“人口红利”衰退已是不争的事实，给社会经济发展既带来机遇又增加挑战，我们应采取调整人口政策、优化产业结构、提高劳动力素质、推动城乡一体化等措施来积极应对，实现“人口红利”效益最大化。     

高职《平面四杆机构急回特性》教法浅析

急回特性是平面四杆机构的基本性质之一。对急回特性的分析是高职《机械基础》教学中的一个重点和难点,如何将四杆机构动态过程中发生的急回现象在授课中清楚、形象地展现出来,让学生易于接受、听懂、学会,不仅需要从教学环节上精心设计,还需利用现代化教学手段等多方面着手,才能达到良好的教学效果。     

The Shapley Value of a Patent Licensing Game: the Asymptotic Equivalence to Non-cooperative Results

We consider a game in characteristic form played by firms and an outside patent holder of a cost-reducing innovation. The worth of a coalition of players is the total Cournot profit the coalition can guarantee to obtain when it operates an optimal number of its firms while the complement operates any number of its firms as to minimize the profit of the coalition. Only firms in a coalition with the patent holder are allowed to use the efficient technology. We prove that when the number of firms is large, the Shapley value of the patent holder approximates the payoff he obtains in the non-cooperative auction game traditionally studied in the literature.We thank an anonymous referee for very helpful comments that significantly improved the paper. The second author is being partially supported by the Ministry of Education, Culture, Sports, Science and Technology (MEXT), Grant-in-Aid for 21 Century COE Program. He wishes to thank his advisor Yair Tauman and co-advisor Pradeep Dubey for their intellectual guidance, Akira Okada and Haruo Imai for their encouragement, and Shigeo Muto for his helpful comments to the first draft of this paper at the autumn meeting of the Japanese Economic Association in 2003.     

浅谈抗震设计中α_(max)变化对结构设计的影响

本文通过理论计算分析,比较同一个工程随水平地震影响系数最大值αmax的变化砼用量和钢筋用量的变化情况,从而得出工程造价的变化情况。这对建筑结构设计工作和估算建设成本均具有一定的指导意义。