纳米金杂化酶研究进展

随着纳米技术和生物技术的发展,将纳米颗粒材料与天然酶结合起来构建纳米杂化酶,可以解决酶的负载量低、活性和稳定性不好等问题.目前,新型纳米颗粒材料-纳米金被广泛应用于构建杂化酶体系.我们将从纳米金杂化酶的种类、制备方法、优势以及应用等方面对纳米金杂化酶的研究进展进行概述.     

HOW DOES MECHANICS MAJOR DO UNDER THE SITUATION OF COLLEGE CATEGORY ENROLLMENT?

在大类招生形势下，不少高校力学专业出现了修读生源减少、生源质量下降的情况，不利于力学学科的整体发展。针对此问题，从力学专业招生面临的形势、力学学科的优势、以及大类分流工作的实践三个方面，探讨如何做好力学专业大类分流工作。     

Strategic capability investments and competition for supply contracts

Suppliers often make proactive investments to strategically position themselves to win contracts with a large buyer. Such investments reduce the suppliers’ variable costs of serving the buyer’s demand. We show that an auction mechanism does not always benefit the buyer, the supply chain, or the society. We identify scenarios where the buyer can implement the supply chain and socially optimal solution by committing to a bilateral relationship with fair reimbursement, and forgoing the benefits of competition altogether. We explore the role of commitment by the buyer (to a procurement mechanism) and by the suppliers (to an investment level) by analyzing different timing games under symmetric and asymmetric information about suppliers’ types. We show that it never benefits anyone for the suppliers to commit first. Equilibrium investments and cost structures depend upon the buyer’s bargaining power (opportunity cost). However, the winning supplier’s investments are almost always below the supply chain optimal level.     

基于竞争优势理论的产业集群形成的量化研究

本文从形成产业集群的竞争成势理论出发,运用多元统计中的主成分分析和聚类分析方法,阐明形成产业集群量化的一般原理,并对河南省18个地区的经济水平进行了区域分类,据此进行综合评价,提出产业集群的培育和区域经济的发展对策。     

基于优势的双边匹配决策方法

传统的双边匹配方法根据主体双方给出的偏好序信息排序, 忽略匹配双方个体间存在的差异, 匹配结果不能很好的满足主体需求, 稳定性较差, 造成资源的错配甚至浪费。本文以人为出发点, 基于对匹配主体特征属性的优势结构识别, 提出新的序值依据, 将定性的不确定匹配标准依重视程度量化, 从而实现对人的多维度测量, 最大化个体差异, 以实现“按需匹配”的高稳定性、高满意度匹配结果。构建基于主体客观评价的优势属性量表; 引入个体综合情况的计算公式; 依托隶属度加权法把多目标优化转变成单目标优化; 运用Hungarain方法获得满意度最高且稳定匹配的指派方案; 最后通过算例证明本方法的科学性和可行性。     

逐次极值法及其应用

对于带有不等式约束的函数最优化,指出经典微分法在实际应用中的一些困难,为此提出逐次极值法.论证并设计出逐次极值法的原理和算法,结合典型案例,说明逐次极值法的实际分析操作.以优势曲线与优势函数为特征的分析与推导,含有严格的理论证明,为有效的早期筛选提供了理论依据.最后总结归纳了逐次极值法的优点.     

The Varigrad and similar apparatus in gradient liquid chromatography: A systematic computational approach. Part 1: Theoretical development

Different methods for producing a pre-assigned gradient in liquid chromatography are presented. A systematic approach to the calculations involved is given. The derived equations are mostly Poisson and Poisson summation distributions which are tabulated in the literature. The incremental method of gradient elution developed by Scott has been modified. In the modified apparatus two mixing chambers are used instead of one. This leads to an appreciable decrease in the number of reservoirs needed for the same precision in fitting a desired gradient. The application of the derived equations, together with other Varigrad modifications, will be given in Part 2 of this paper (to be published shortly in this Journal).     

纵横码比较优势分析及推广应用策略的制订

纵横码具有数字编码、规则简单、易学易记、词组丰富等特点,在香港、江苏、浙江、上海等地得到一定规模的推广.深入分析了纵横码的潜在优势,探讨了进一步推广应用的策略,以及在推广过程中所应采取的措施.