检索结果-南通市图书馆

在线全文

cnki会议

学校读者我要写书评

暂无评论

汉语自动分词专家系统的设计与实现

微处理机 2004年第3期25卷 56-57,60页

作者：王彩荣沈阳师范大学信息技术学院沈阳110034

本文介绍了自动分词专家系统的设计思想和系统结构 ,并给出了自动分词专家系统知识库的组织与实现方法 ,以及推理机制的建立和自动分词过程。

关键词：自动分词切分歧义字段专家系统

Improved Self-Indexing Inverted Files for Full-Text Retrieval

在线全文

学校读者我要写书评

暂无评论

Improved Self-Indexing Inverted Files for Full-Text Retrieva...

第四届全国信息检索与内容安全学术会议

作者： Rongbo Zhu~1 Xiaozhu Liu~(2+) ~1 college of Compute science,South-Central university for Nationalities,Wuhan 430074,china ~2 State Key Lab of Software Engineering,Wuhan university,Wuhan 430072,china

Self-index is a promising way to improve retrieval time-and-space efficiency by compression index *** on the self-indexing inverted files,an improved inverted file self-index called IFSI is proposed for full-text information *** includes two level indexes:the first level index which contains a subset of the documents that are likely to be returned as top results;and the second level index which includes the surplus *** can create a skipped index on each compressed posting list with very little or no storage overhead with efficient coding *** also supports efficient incremental updates with allocating free space efficiently at the tail of post lists based on statistics-based *** simulation results and comparison with other schemes prove that the proposed IFSI can not only greatly reduce decompress time by skipping over unnecessary portions of the list,but also simultaneously allow extremely fast query processing of both conjunctive Boolean queries and ranked queries.

关键词： Self-indexing Space efficiency Query efficiency Full-text retrieval

An LMI Approach to HH∞ Filtering of Uncertain Systems

在线全文

cnki会议

学校读者我要写书评

暂无评论

An LMI Approach to HH∞ Filtering of Uncertain Systems

第24届中国控制与决策会议

作者： Liang Hong 1 , Xiao-Heng Chang 2 1. School of mechanical Electronic and information Engineer, china university of Mining and Technology, Beijing, 100083, china.2. college of Engineering, Bohai university, Jinzhou, 121003, china.

This paper studies the H∞ filtering problem of linear uncertain systems with polytopic uncertainties. By introducing some slack matrices and using the parameter-dependent Lyapunov function approaches, sufficient conditions for the existence of such filter are expressed in terms of linear matrix inequalities （LMIs）. And, a convex analysis procedure is implemented to derive the filter gain matrices. Finally, a numerical example is presented to illustrate the theoretical developments.

关键词： Uncertain systems parameter-dependent Lyapunov function slack matrices H∞ filtering Linear matrix inequalities (LMIs)

Anticancer Activities of Trichostatin A on Maligant Lymphoid Cells

在线全文

cnki会议

学校读者我要写书评

暂无评论

Journal of Huazhong university of science and Technology(Medical sciences) 2006年第5期26卷 538-541页

作者：孙春艳刘新月陈燕刘芳 Institute of Hematology Union HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430022China

The anticancer activity of trichostain A （TSA） on human B cell non-Hodgkin＇s lymphoma and its mechanism were explored, The effect of TSA on the growth of Raji cells and normal peripheral blood mononuclear cells （NPBMNC） was studied by MTr assay, The effect of TSA on the apoptosis of Raji cells and NPBMNC was studied by flow cytometry and TDT-mediated dUTP nick end labeling （TUNEL）. The effect of TSA on the cell cycle of Raji cells was studied by propidium iodide method. The results showed that TSA potently inhibited proliferation of Raji cells at microgram concentrations and induced apoptosis of Raji cells in a time-and concentration-dependent manner. Treatment with TSA induced accumulation of cells in G0/G1 or G2/M and a concomitant decrease of cell population in S phase. However, NPBMNC was less sensitive to the cytotoxic effect of TSA than Raji cells. It was concluded that TSA may inhibit the proliferation of Raji cells by regulating the cell cycle and inducing the cell apoptosis. Moreover, TSA demonstrates low toxicity in NPBMNC but selectively induces apoptosis of Raji cells.

关键词： Trichostatin A Raji cell Apoptosis Cell cycle Cytotoxicity

在线全文

学校读者我要写书评

暂无评论

我国当代教学模式刍议

沈阳教育学院学报 2002年第3期4卷 14-16页

作者：乔玉香湖南师范大学教育系湖南长沙410081

教学模式是教学理论与实践的中介与桥梁。在素质教育理念的指导下我国当代教学模式从单一化向多样化的方向发展 ;这些教学模式与传统的教学模式相比具备许多优越性 ,但与当代西方教学模式相比 ,还存在着一些不足。思考这些不足对日后我... 详细信息

教学模式是教学理论与实践的中介与桥梁。在素质教育理念的指导下我国当代教学模式从单一化向多样化的方向发展 ;这些教学模式与传统的教学模式相比具备许多优越性 ,但与当代西方教学模式相比 ,还存在着一些不足。思考这些不足对日后我国教学模式的建构有着反面的借鉴作用。

关键词：教学模式建构个性化教学课堂教学教学理构

在线全文

学校读者我要写书评

暂无评论

中华绒螯蟹在欧州

水产科技情报 2003年第1期30卷 7-9,12页

作者：堵南山华东师范大学生命科学学院上海200062

分析了中华绒螯蟹侵移欧洲的过程 ,介绍了该种群目前在欧洲的分布情况。

关键词：中华绒螯蟹欧洲侵移分布

On Small Current Grounding System in Single-phase Grounding Fault Line Selection Based on DSP

在线全文

学校读者我要写书评

暂无评论

On Small Current Grounding System in Single-phase Grounding ...

第二十九届中国控制会议

作者： LI Bo1,CHU Lili1,LIU Yanjun2 1 information science&Engineering college,Liaoning university of Technology,Jinzhou 121001,P.R.china2 School of sciences,Liaoning university of Technology,Jinzhou 121001,P.R.china

The fault mechanism of small current grounding system in single-phase grounding is discussed,and the principle of fault line selection of transient component on faulty phase current is *** the design of hardware and software,it is proved the amplitudes summation of zero sequence transition current between fault line and healthy lines makes a big difference in the feature *** analysis of the system simulation shows the area of zero sequence transition current on fault line in the spectrum is the ***,the application of small current grounding system in single-phase grounding fault line selection based on DSP is an advanced novel method which can distinguish between fault line and healthy lines effectively and accurately.

关键词： Line Selection Transient Current Spectrum DSP Feature Band