油田水CaCO_3结垢反应的计算与应用

以热力学计算为基础，广泛采用油田水的数据．计算了ＣａＣＯ３的预测条件，并根据油田生产实际，建立了使用防垢剂时的预测模型．根据理论模型编制成计算机程序，并与文献结果和油田观测结果进行了对比，提出了临界浓度和临界稳定常数的计算和应用方法．为防垢剂的选择提供了理论依据，大量计算表明，预测结果与文献和现场观测结果相符．     

非独立随机变量序列成立大数定律的问题

本文就非独立随机变量序列的情形,总结并推广了一些大数定律。     

ON THE OPTIIMAL REACTIONS ASSEMBLAGE OF COMPLEX REACTION SYSTEMS

In this paper, the author analyzes distinguishing features of complex reaction systems and single reversible reaction, and optimizes complex reaction systems starting from set theory.The method of constructing the optimal reactions assemblage and calculating the potential maximum equilibrium yield (PMEY) of objective products is proposed here. This paper points out clearly that the euqilibrium yield of objective products calculated by means of conventional method is the global equilibrium yield (GEY).It is not the thermodynamic constraint, and could be exceeded by observed yield of objective products; only PMEY is the thermodynamic constraint. It gives information on potential and possible optimal yield and thereby improving production. This paper also points out the way in which the real complex reaction system approached the optimal reactions assemblage. The new concept of PMEY and optimal reaction assemblage proposed by this Paper is universally applicable for the important complex reaction systems, such as the pyrolysis of alkane to produce ethylene, steam reforming of methane to produce syngas, production of formaldehyde from methanol, epoxidation of ethylene to produce ethylene oxide, hydrogenation of benzene to produce cyclohexane.     

A latent class probit model for analyzing pick any/N data

A latent class probit model is developed in which it is assumed that the binary data of a particular subject follow a finite mixture of multivariate Bermoulli distributions. An EM algorithm for fitting the model is described and a Monte Carlo procedure for testing the number of latent classes that is required for adequately describing the data is discussed. In the final section, an application of the latent class probit model to some intended purchase data for residential telecommunication devices is reported. Geert De Soete is supported as “Bevoegdverklaard Navorser” of the Belgian “Nationaal Fonds voor Wetenschappelijk Onderzoek.”     

以Monte Carlo为基础的发电系统随机生产模拟的韦伯分布法

介绍了Monte Carlo方法的基础上,分析了以往的文献中发电系统的随机生产模拟分布的不足之处后,提出了发电系统随机生产模拟的韦伯分布法及模拟方法。     

一类信号所确定的预测误差滤波器的零点分布

对R.Kumaresan提出的由M个指数衰减(或不衰减)的正弦信号的和组成的信号进行了推广,讨论了由这类推广了的信号所确定的预测误差滤波器多项式的零点分布。信号零点完全由信号所确定。不论信号零点如何分布,只要预测误差滤波器多项式的系数满足某些条件,则其额外零点在单位圆的外部呈均匀状分布。     

新电位溶出分析方法研究

本文对新电位溶出分析方法进行了综述和研究,并着重讨论了流动注射电位溶出分析和间断多次扫描流动注射电位溶出分析.     

奥运会临时超市网点设计模型

给出了2008年北京奥运会临时超市网点的设计模型。根据题目提供的三次问卷调查表,给出了问题一观众的出行、用餐和购物的规律。利用问题一的结论,以最短路径作为观众出行路径原则,得出了问题二的人流量分布。对于问题三,以分布基本均衡作为目标函数,以满足购物需求作为约束条件,给出了临时超市网点设计模型。     

现代站立式背向滑步推铅球技术的探讨

站立式背向滑步推铅球,是近年来国内外田径大赛中出现的一项新技术。通过力学和解剖学两方面的分析,证明站立式技术具有节省体力、滑步速度快,动作加速连贯性强、有利于最后“鞭打”用力,兼有动作简单、容易掌握等特点,具有较高的实用和推广价值。     

聚合条件对苯乙烯-丙烯酸丁酯甲基丙烯酸乳液聚合粒度分布的影响

为了解聚合条件对多组份共聚乳液粒度分布的影响,采用光散射粒度分布仪研究了丙烯酸丁酯（ＢＡ）苯乙烯（Ｓｔ）甲基丙烯酸（ＭＡＡ）体系在复合乳化剂存在下的乳液聚合行为．探讨了聚合温度、乳化剂配比、乳化剂浓度、单体配比、ＭＡＡ含量等对粒度分布的影响规律．结果表明聚合温度降低和油溶性单体Ｓｔ含量增大均使乳液粒径变大,而乳化剂的配比和浓度对粒度分布的影响较为复杂．