英汉机器翻译试验系统中词典的构造

文章论述了基于规则的英汉机器翻译试验系统中词典的设计思想和构造方法 ,以一部综合英语词汇学、句法学、语义学、语用学等语言学知识和汉语语言学、英汉比较语言学等知识于一体的英汉转换词典代替传统的基于多部词典的机器翻译方法。试验表明该词典在解决英语词汇歧义、结构歧义、提高汉语译文准确率等方面较为有效     

角谷变换下的正奇数分类及其马氏链模型

考虑在角谷变换F下，将全体正奇数N1进行分类，得到正奇数N1的等价二叉树模型；另一方面，发现三类正奇数在角谷变换F下的马氏链模型，是模为2^n的同余吸收链的极限形式．     

基因工程技术及其在林木培育中的应用

概述了基因工程在国内外林木培育中的应用现状及发展趋势 ,综述了我国十多年来林木在抗虫、抗病、抗逆境、品质改良、育性等基因工程的研究与应用研究取得的一些进展及今后的发展方向。     

初等树变换的算法改造

本文利用王氏代数对用初等树变换生成树的方法进行了改造,提出了一种新的初等树变换的算法。新算法较之原法简洁、直观、运算方便、概念清楚,并保留了原法的所有优点。     

Binary Event String Analysis: A Compact Numerical Representation of the Event Tree

While the event tree is a useful diagrammatic aid to an appreciation of various event sequence possibilities, it is of a nature that suggests no obvious manner in which the associated probability data may be compiled as computer input. Here, we propose a complementary numerical representation of scenario possibilities which incorporates probability data in a succinct fashion. While its mnemonic properties facilitate the logical development of a system's characteristics, its compactness and unambiguity permit its utilization directly as computer input.     

Tree-structured subgroup analysis for censored survival data: Validation of computationally inexpensive model selection criteria

The performance of computationally inexpensive model selection criteria in the context of tree-structured subgroup analysis is investigated. It is shown through simulation that no single model selection criterion exhibits a uniformly superior performance over a wide range of scenarios. Therefore, a two-stage approach for model selection is proposed and shown to perform satisfactorily. Applied example of subgroup analysis is presented. Problems associated with tree-structured subgroup analysis are discussed and practical solutions are suggested.     

Clustering of Microarray data via Clique Partitioning

Microarrays are repositories of gene expression data that hold tremendous potential for new understanding, leading to advances in functional genomics and molecular biology. Cluster analysis (CA) is an early step in the exploration of such data that is useful for purposes of data reduction, exposing hidden patterns, and the generation of hypotheses regarding the relationship between genes and phenotypes. In this paper we present a new model for the clique partitioning problem and illustrate how it can be used to perform cluster analysis in this setting.     

清代树木栽培技术及相关文献探析

中国的树木栽培技术源远流长,曾取得过辉煌的成就。清朝时期在对前人的树木栽培技术进行系统总结和归纳的基础上,结合树木栽培的生产实践,编纂出版了几部学术价值高、影响大、实用性强的文献资料。同时这一时期在植物嫁接成活的生理机制研究、嫁接技术、树木移栽、良种选育与新品种培育、实生苗繁殖技术等方面取得了一定的成就,使清代的树木栽培技术更加完善和成熟。     

关于图P_1(∨P_4)T_n的优美性

本文研究了一类图P1∨P4T n的优美性.利用构造函数标号的方法,证明了下面结论:对于任意正整数n,T n是n个顶点的优美树,则当n≥2时,P1∨P4T n是优美图.其中,P1是1个顶点的平凡图,P4是4个顶点的路,图P1∨P4T n是把P1之中的顶点与T n之中的每一个顶点之间都通过一个P4连接起来所得到的.