Chinese Word Boundary Ambiguity and Unknown Word Resolution Using Unsupervised Methods

An unsupervised framework to partially resolve the four issues, namely ambiguity, unknown word, knowledge acquisition and efficient algorithm, in developing a robust Chinese segmentation system is described.It first proposes a statistical segmentation model integrating the simplified character juncture model (SCJM) with word formation power.The advantage of this model is that it can employ the affinity of characters inside or outside a word and word formation power simultaneously to process disambiguation and all the parameters can be estimated in an unsupervised way.After investigating the differences between real and theoretical size of segmentation space, we apply A* algorithm to perform segmentation without exhaustively searching all the potential segmentations.Finally, an unsupervised version of Chinese word-formation patterns to detect unknown words is presented.Experiments show that the proposed methods are efficient.     

Test of an ME Chip Based on FPGAs

The characteristic of FPGA, motion estimation(ME) and the full search block matching arithmetic were introduced, it analyses the collectivity configuration of basic working flow in ME.Based on FPGA, the study concentrates on the control, computing and test part of ME chip implementation.In the end PCB of ME chip is designed and completed.ME is an important link of MPEG standard on picture compression, whose characteristics is its huge amount of data and computing task.So people often use special chip to meet the requirement, but there is still not such production in China at present.     

间接控制系统第二标准形的绝对稳定性准则

对具有第二标准形的间接控制系统给出了一个保证其零解绝对稳定的充分条件。     

一类非线性发展方程解的存在性

利用Ｂｒｏｗｄｅｒ建立的单调型映射拓扑度理论和极大单调映射的特性,研究了一类非线性发展方程初值问题(Ｅ)ｄｕ(ｔ)ｄｔ＋Ａ(ｔ)ｕ(ｔ)＋Ｇ(ｔ)ｕ(ｔ)∈ｆ(ｔ)ｕ(０)＝ｕ０｛０≤ｔ≤Ｔ解的存在性,这里Ａ(ｔ)是多值极大单调映射,Ｇ(ｔ)是单值非单调映射·在Ｈｉｌｂｅｒｔ空间中,该结论是Ｈｉｒａｎｏ,Ａｈｍｅｄ等相应定理的发展和推广·     

R—B型化合物的结构特点分析

将简单化合物中的卤代烃、醇、醚和胺统一作为Ｒ—Ｂ型化合物来处理，通过分析Ｒ—Ｂ型化合物的结构特点，比较Ｂ的不同而引出不同化合物的主要化学性质．从而加强学生对结构决定化学性质的认识，增加该部分教材的逻辑性和推理性     

快速原型制造中新型数据模型的研究

分析当前快速原型制造系统中采用的STL数据模型的结构 ,针对其缺陷提出了一种新型的数据模型 ,弥补了STL数据模型缺乏几何拓扑信息 ,冗余数量大的不足 ,并在新的模型的设计中引入空间分割的概念 ,提高了快速原型制造的效率。     

霍夫曼水电解器的微型化改进

用医用注射针管作电解室,注射针头作电极,对霍夫曼水电解器进行代换改装,若选用10％的NaOH溶液作电解液,在电源电压12V的条件下4min内可电解出H_24.4ml,Q_22.2ml,两气体体积比符合理论值,验证气体时的现象比较明显,演示效果令人满意。     

集线器（HUB）供电技改

介绍了集线器失电的原因,阐述了集线器失电的危害,提出了切实可行的解决方案,提高了变电站运行的安全可靠性。     

二电平PAM系统盲均衡的一种新方法

根据数字通信码间干扰的数学模型，提出了一种解决盲均衡问题的新方法，该方法计算复杂程度低，易于实现实时处理。文中给出了计算机模拟结果。     

胜利油田小井眼钻井初步试验的效果及分析

小井眼钻井是目前国内外蓬勃开展的钻井技术之一，主要目的是为了节省油田的勘探和开发成本，胜利油田开展了七口小井眼浅层气井的钻井试验，取得了几点认识，本文对试验情况进行了简要总结，对试验效果进行了简要分析，提出了今后如何完善这项技术建议。