液晶分子能级和电荷密度的计算

液晶的理论有两类:唯象理论和微观理论。但是还没有关于液晶分子能级和电荷密度的计算方法。本文用图论的方法,将液晶大分子的复杂结构图,逐步简化成简单的结构图,导出液晶分子的能级方程及电荷密度表达式,从而为液晶分子结构和性能的探讨提供了方便的工具.     

与网络问题有关的一些极图

本文研究与网络题有关的一些极图,得出的主要结果有:五个关于没有三角形的极大图的定理,以及它们的三个推论。     

A mixture likelihood approach for generalized linear models

A mixture model approach is developed that simultaneously estimates the posterior membership probabilities of observations to a number of unobservable groups or latent classes, and the parameters of a generalized linear model which relates the observations, distributed according to some member of the exponential family, to a set of specified covariates within each Class. We demonstrate how this approach handles many of the existing latent class regression procedures as special cases, as well as a host of other parametric specifications in the exponential family heretofore not mentioned in the latent class literature. As such we generalize the McCullagh and Nelder approach to a latent class framework. The parameters are estimated using maximum likelihood, and an EM algorithm for estimation is provided. A Monte Carlo study of the performance of the algorithm for several distributions is provided, and the model is illustrated in two empirical applications.     

铁乳胶室簇射转换曲线半宽度与强子／γ分辨

利用中日合作西藏甘巴拉山铁乳胶室的实验数据，研究了级联转换曲线及其半宽度（ＦＷＨＭ）的性质，讨论了利用半宽度分布将起始点深度面△ｔ＜６ｃ．ｕ．的簇射事例中强子与γ区分开来的可能性，并由此提出一种联合判选标准，这种标准提高了铁乳胶室强子的判选效率．     

西文图形方式下的汉字显示

本文以ＣＣＤＯＳ２．１３系ｙ４Ｈ汉字为例，从分析汉字点阵字库的显示原理及汉字点阵字库的结构入手，介绍如何在西文ＤＯＳ下直接读取汉字１６点阵，并给出在屏幕上以点阵方式显示汉字的一般方法及显示函数的源程序清单。     

工业企业成本核算微机处理系统

本文扼要介绍一个实用性和通用性较强的微机成本核算系统及其在系统开发过程中所采取的技术措施。     

图的坚韧度与哈密尔顿圈

本文研究了图的线坚韧度的性质及线坚韧度与点坚韧度之间的关系，并利用坚韧度给出图是 哈密尔顿国的一个充分条件。     

The terrestrial NPP simulations in China since Last Glacial Maximum

Based on Atmosphere-Vegetation Interaction Model （AVIM）, the magnitude and spatial distribution of terrestrial net primary productivity （NPP） in China is simulated during three different geological eras, Last Glacial Maximum （LGM）, Mid-Holocene （MH） and the present. The simulation shows that the glacial-interglacial variation of East Asian summer monsoon in China is the key factor affectfng the NPP change. During the three eras, mean NPPs are 208 g/m^2·a, 409 g/m^2·a, and 355 g/m^2·a. The total NPPs are 2.05 Pg/a, 3.89 Pg/a and 3.33 Pg/a, respectively. The terrestrial NPP in China during warm-humid climate is larger than that during cold-arid eras, and the correlation analysis between NPP and climate factors suggests that temperature is the primary factor affecting the terrestrial NPP during 21 kaBP （LGM）, and for 6 kaBP （MH） and the present the primary factor is precipitation.     

求函数值域及最值

求函数值域是高考数学中的重要题型之一，对求函数值域常用方法如直接法、反函数法、判别式法、函数的单调性法、换元法、均值不等式法、构造法、导数法等进行了系统的研究。     

"更相减损术"不是求最大公因数的算法

人民教育出版社出版的普通高中课程标准实验教科书《数学③》(必修)指出《九章算术》中的“更相减损术”是求两个数的最大公约数的算法,其实“更相减损术”是将一个分数化简为既约分数的算法。