一个修正的三项LS共轭梯度法

基于已有的共轭梯度法的思想,提出了一个三项LS共轭梯度方法,该方法能保证搜索方向在不需要任何线搜索下具有充分下降性,并在适当条件下获得此方法对一般函数的全局收敛性.     

一个新的PRP共轭梯度法的全局收敛性

提出了一个不依赖线搜索且具有充分下降性的新的共轭梯度法(ZPRP法),并证明了ZPRP方法在强Wolfe搜索条件下全局收敛.     

二项式等式的一种新方法证明与q化

主要是对Jonathon Peterson的著名的二项式等式及其推广采用了一种新的方法——围线积分进行证明,并且采用柯西留数定理对它们进行了q化;与此同时也得到了一些类似于Jonathon Peterson的二项式等式的新的二项式等式及其q化等式.     

A spatial entropy reflecting distribution of spatial objects

Decision trees are mainly used to classify data and predict data classes. A spatial decision tree has been designed using Euclidean distance between objects for reflecting spatial data characteristic. Even though this method explains the distance of objects in spatial dimension, it fails to represent distributions of spatial data and their relationships. But distributions of spatial data and relationships with their neighborhoods are very important in real world. This paper proposes decision tree based on spatial entropy that represents distributions of spatial data with dispersion and dissimilarity. The rate of dispersion by dissimilarity presents how related distribution of spatial data and nonspatial attributes. The experiment evaluates the accuracy and building time of decision tree as compared to previous methods and it shows that the proposed method makes efficient and scalable classification for spatial decision support.     

A fast construction method for spatial index GBD tree 

This paper proposes a fast initial construction method of the GBDtree. The GDB tree has proper characteristics for management of large amount of 2 or 3 dimensional data. However, the GBDtree needs long initial construction time by originally proposed onebyone insertion method. A fast insertion method has been proposed, but it needs large size of buffer capable to hold index information of all entries. The paper proposes another fast initial construction method. The method requires only limited size of work space (buffer). The experimental results show the initial construction time reduces into a third or a quarter of the onebyone insertion method. The memory efficiency and retrieval efficiency are also improved than the onebyone insertion method.     

基于多普勒效应的单声源速率测定算法研究

应用多普勒效应原理,实现了对固定频率、匀速运动的单声源的速率测定.利用MATLAB拟合了固定传感器接收到的该声源运动时的声音信号,用Hilbert变换得到了该信号的瞬时频率,并以离散时间域的多普勒效应为目标函数,采用非线性最小二乘拟合得到其速率.算法采用小波分析及经验模态分解(EMD)方法分别对原始声音信号和瞬时频率进行去噪.实验结果表明,该算法精度较高,是一种可行的方法.     

多端统一潮流控制器的研究

构建了二端统一潮流控制器（T-UPFC）的动态模型,该模型充分考虑了T-UPFC内部的调节过程,计及了TUPFC逆变器的调制过程以及直流电容的充放电过程。将模糊神经网络（FNN)应用于T-UPFC的控制设计。系统仿真表明了在频率波动较大情况下,所设计的T-UPFC性能优越,能有效、快速地抑制系统后续摆的振荡,从而提高了系统的动态稳定性。     

大黄鱼基因组DNA的不同提取方法及RAPD扩增比较

采用三种方法提取大黄鱼肌肉基因组DNA,并以所提取的DNA为模板进行RAPD分析比较.结果表明,与传统方法、高盐抽提法相比,星普法具有快速简便、所需样品量少,所提取的DNA质量高等特点.三种方法所得的DNA分子量大小都在20kb以上,且RAPD扩增条带基本一致.     

The Solgel Preparation and Electric Properties of MnO2-doped PbTiO3 Ceramics

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Synthesis and Quantum Chemistry Studies of (R)-N-(Propionylthiazolidine-2-thione-4-methoxycarbonyl)germanium Sesquioxide

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