全乙酰基－β－Ｄ吡喃半乳糖的超声溴化反应动力学

运用薄层色谱扫描技术研究了回流温度时(76°C)1,2,3,4,6-五-O-乙酰基-β-D-吡喃半乳糖的超声溴化反应,通过测定反应液中初始物半乳糖的浓度随超声辐照时间的变化,采用一次法和初速度法分别建立了该反应的反应动力学方程:r=9.348×1-0 31ρ(一次法),r0=1.07 8×1-0 21ρ,0(初速度法),确认这一反应对初始物半乳糖为一级反应,探讨了可能的反应机理,根据推测的反应机理得到的动力学方程为r=K1ρ,(K=2k1k2ρNBSk5),与实验结果一致。     

Game Theory Study on Distributors'''' Alliance to Gain Competitive Advantage in Marketing Channel

Using the Cournot Game Model, this paper has analyzed the motivation of the distributors' alliance to gain competitive advantage in marketing channel. At first, this paper separately analyzed the advantage of alliance in the situation of oneshort game and infinitely repeated game, then, based on the analysis of distributors' betrayal of the alliance under infinitely repeated game, the conditions to maintain the distributors alliance are put forward and discussed.     

论加速系数与失效机理不变的条件(Ⅰ)─—寿命型随机变量的情况

本文根据加速系数的定义，深入研究了加速系数的性质，指出了这些性质与失效机理不变条件间的本质联系，给出了各种常见寿命分布失效机理不变的条件。     

对数正态分布环境因子的统计推断

为了对不同环境下的试验数据进行折算与综合，本文在失效机理不变的前提下，系统地讨论了对数正态分布环境因子的定义；给出了判别两种环境下产品失效机理是否发生了显著变化的统计检验方法；并推导了对数正态分布环境因子的极大似然估计（ＭＬＥ）以及经典的Ｂａｙｅｓｉａｎ与Ｆｉｄｕｃｉａｌ区间估计。最后用数值例说明了这些方法。结果表明该定义及这些方法是恰当的。     

System Dynamics Model of Financial and Monetary Mechanism

System dynamics model of financial and monetary mechanism are established on thebasic of qualitative research in financial and monetary theory,by applying system dynamics to finan-cial and monetary law of movement,development and change in economic system and simulating thislaw.With it,we can analyse the interrelations between finance and banking;analyse the quantityof money demanded by the economic system,determine the most desirable quantity of money de-     

Dissolution behavior and dissolution mechanism of palygorskite in HCl solution

The 1 mol/L, 3 mol/L and 5 mol/L HCl solutions were employed to leach two palygorskites with different trioctahedral contents in their crystal structure for different period of time. The results of the dissolution experiments show that the dissolution process could be divided into three steps, and that this dissolution behavior can be attributed to its higher Mg2+ content, and is restricted by the extraction behavior of Si4+. The preferential extraction for Mg2+ promotes the extraction behavior of Si4+ from Si-O framework. Because the Si4+ in the form of amorphous SiO2 is adsorbed onto the surface of palygorskite fibre, the reaction between palygorskite and acid is obstructed. With the elapsing of time, or the increasing of the acid concentration, the amorphous SiO2 flocculates, and then the channels of chemical reaction are reopened. The ratio value of Mg2+/(Fe3++Al3+) in leaching solution tends to a fixed value, showing that the acid attacks not only the surface but also the structural channels. There are no obvious three steps observed during the acid attack on the palygorskite with a lower trioctahedral content. The differential behavior for two palygorskites is discussed.     

通过创新机制打造高素质的项目经理队伍

项目经理的管理和项目经理队伍的建设是关系到建筑业行业发展的核心课题。针对目前我国项目经理存在的诸多问题，提出进一步强化项目经理责任制、健全项目经理管理制度、加大对项目经理市场行为的监管力度等措施。     

空间机构计算机仿真的模块化设计方法

对空间机构的计算机仿真，提出一种模块化设计方法，并对简单的单一机构仿真进行扩充。提出一种实现多机构多型态的实时仿真的方法，对空间机构的仿真很有意义。     

基于机构组合原理复杂机构的符号表达

概念产品的信息表达是目前实现计算机对机构概念设计支持的瓶颈问题，作者基于机构组合原理，用矩阵形式描述基本机构，给出了串联式、并联式和混合式3种基本机构的组合方式的符号表达方法，该方法能够描述机构的类型、连接关系、空间位置关系以及机构的多功能等信息，为开发基于基本机构组合的复杂机械系统的计算机辅助概念设计系统奠定了理论基础，以复杂凸轮连杆机构为例，验证了本文提出的符号表达方法的可行性。     

搜索引擎的智能化发展趋势

简要介绍了搜索引擎的工作机理，对传统搜索引擎与智能化搜索引擎进行了分析及综合评价，并提出了智能化搜索引擎发展的相关技术。