基于代数分解的MSI组合电路扩展技术

讨论了一位全加器及优编器的逻辑功能，给出了适当的代数表示形式，在此基础上提出了基于代数分解方法的扩展技术。     

Parsimonious translation models for information retrieval

In the KL divergence framework, the extended language modeling approach has a critical problem of estimating a query model, which is the probabilistic model that encodes the user’s information need. For query expansion in initial retrieval, the translation model had been proposed to involve term co-occurrence statistics. However, the translation model was difficult to apply, because the term co-occurrence statistics must be constructed in the offline time. Especially in a large collection, constructing such a large matrix of term co-occurrences statistics prohibitively increases time and space complexity. In addition, reliable retrieval performance cannot be guaranteed because the translation model may comprise noisy non-topical terms in documents. To resolve these problems, this paper investigates an effective method to construct co-occurrence statistics and eliminate noisy terms by employing a parsimonious translation model. The parsimonious translation model is a compact version of a translation model that can reduce the number of terms containing non-zero probabilities by eliminating non-topical terms in documents. Through experimentation on seven different test collections, we show that the query model estimated from the parsimonious translation model significantly outperforms not only the baseline language modeling, but also the non-parsimonious models.     

A review of ontology based query expansion

This paper examines the meaning of context in relation to ontology based query expansion and contains a review of query expansion approaches. The various query expansion approaches include relevance feedback, corpus dependent knowledge models and corpus independent knowledge models. Case studies detailing query expansion using domain-specific and domain-independent ontologies are also included. The penultimate section attempts to synthesise the information obtained from the review and provide success factors in using an ontology for query expansion. Finally the area of further research in applying context from an ontology to query expansion within a newswire domain is described.     

An empirical study of query expansion and cluster-based retrieval in language modeling approach

The term mismatch problem in information retrieval is a critical problem, and several techniques have been developed, such as query expansion, cluster-based retrieval and dimensionality reduction to resolve this issue. Of these techniques, this paper performs an empirical study on query expansion and cluster-based retrieval. We examine the effect of using parsimony in query expansion and the effect of clustering algorithms in cluster-based retrieval. In addition, query expansion and cluster-based retrieval are compared, and their combinations are evaluated in terms of retrieval performance by performing experimentations on seven test collections of NTCIR and TREC.     

高中英语写作技能培养模式研究

高中英语写作技能的培养若只重写作结果或过程,或两者兼顾,都很难收到比较理想的效果.以篇章语言学的主述位、主位推进与扩展、句际与段际关系类型、衔接与连贯等理论为基础建立起来的"解读--讨论--模仿--构建"综合教学模式,注重感知、认识、学习、模仿和掌握篇章结构的宏观和微观层面的知识体系,如信息结构、主题思想、主位的推进与扩展、细节的逻辑安排、句际间的衔接、意思的连贯、结构的层次安排等,在此基础上再建构语篇、培养写作技能,效果可能会要好一些.     

扩张的虚无——论文学研究的泛文化症候

新时期以来的文学理论在不断的建构和解构中力求突破传统的话语样态,寻求自己的身份空间。20世纪八十年代后期兴起文化研究的理论建构,是对文学艺术自律论的逆动;其丰富了文学研究方法,扭转了文学边缘化的逆境。大众文化语境中的文学新变在文化研究中得到了关注,多学科学术资源在文化研究中得以整合,但文学理论自身的问题视野与价值立场却在文化研究中缺失。文化研究成为了大众文化的同盟,其在价值多元的口号中生成虚无立场。     

唐宋时期武侠小说的勃兴、沉寂与创新

隋唐五代时期,藩镇跋扈,民生凋敝,尤其中唐以后社会暗杀之风盛行,藩镇各霸一方,私蓄刺客以仇杀异己,平民渴盼一种侠客之救济,故尚豪侠。反映在文学上,武侠小说盛行,其数量之多,品味之高,艺术之成熟,使武侠小说创作达到了一个高峰。而到了宋代,武侠小说基本上沿袭了前代武侠小说的特点,总体来说成就不高。     

微小长度变化量的实验研究

总结了光杠杆放大法、千分表测量法、光的干涉测量法和光的衍射测量法测量微小长度变化量的方法,通过对实验装置进行相应的改造与组装,并用其测量原理和方法以及相关的实验装置对金属受热时的微小伸长量及线胀系数进行了相应的测定,同时对实验结果和误差进行了比较与分析。实验表明,4种测量方法中千分表测量法的相对误差和标准偏差均接近最小值,是4种方法中最理想的测量方法。该实验也有利于激发学生的创新意识,培养他们的研究潜能。     

我国饭店集团市场扩张现状与路径选择

对我国饭店集团市场扩张背景、布局及市场进入方式等现状进行梳理.我国饭店集团市场扩张路径有三种:第一,在集团发展初期以资本式进入为主;第二,在集团发展中后期以契约式进入为主;第三,在集团发展全阶段进行有效的资本运营.     

一类拟线性奇摄动边值问题

利用奇摄动理论,讨论了一类拟线性奇摄动边值问题。首先分别求得问题的外部解和内部解,再进行变量间的变换,得到外部解的内展开式和内部解的外展开式,利用边值条件和匹配原则,得出了该问题解的渐近展开式,推广了相应结论,并将所得结果应用于例子的求解。比较所得的渐近解和用边界层校正法求的解,可知所得到的渐近解达到了较高的精度。