A novel adjustable multiple cross-hexagonal search algorithm for fast block motion estimation

In this paper,we propose a novel adjustable multiple cross-hexagonal search(AMCHS) algorithm for fast block motion estimation. It employs adjustable multiple cross search patterns(AMCSP) in the first step and then uses half-way-skip and half-way-stop technique to determine whether to employ two hexagonal search patterns(HSPs) subsequently. The AMCSP can be used to find small motion vectors efficiently while the HSPs can be used to find large ones accurately to ensure prediction quality. Simulation results showed that our proposed AMCHS achieves faster search speed,and provides better distortion performance than other popular fast search algorithms,such as CDS and CDHS.     

人肺癌组织中热休克蛋白70(HSP70)的纯化

用快速蛋白液相色谱系统并结合ConA-Sepharose柱,建立了从人肺癌组织中分离纯化热休克蛋白70(HSP70)的方法,分离得到的蛋白经过聚丙烯酰胺凝胶电泳和免疫印迹法鉴定,结果表明该蛋白为HSP70;并且通过Brad-ford标准曲线法对蛋白进行定量,计算出HSP70的得率为:每克湿重肺癌组织可纯化得到约53.2μg HSP70。     

浅谈校园网开发与应用中的几个问题

本文主要讨论了校园网建设中的一些问题。在确定了建网原则的基础上,对目前三种主要的建网技术进行了比较,同时对网络服务和应用进行了讨论,并提出了校园网建设中应注意的问题。     

一类含非光滑核积分微分方程的快速解法

用Nystyoem方法对对数型非光滑核的抛物型积分微分方程进行离散，然后利用三步广义共轭余量法迭代求解，其误差为o(l)；迭代过程中的矩阵与向量的乘积则采用快速多极方法，使得此计算时间复杂度由O（n^2)降至O（n)。     

Wang-Ball曲线的细分变换

本文首先介绍Wang-Ball曲线细分的快速算法;然后利用与Bezier曲线的转换矩阵,推导出Wang-Ball曲线的细分变换为相似变换;同时,并给出了具体的数值实例.     

Development of Instrument Control System Using Biosignals Created by the Change of Eyes Movement Sequence

Inthe 196 0′stheUSAirForcedidextensivere searchesontheno handscontrolforpilotsusingbrainwaves.Theseresearcheswerenotworkedoutbecausethehumanbrainelectricalactivitywasundetectablysmall[1] .Forinstance ,Yogaadeptsandotherdisciplinedmedita torscangofromanalertstatetothemeditative“Alpha”statethroughchangingelectroencephalogram(EEG)fromthemostlyirregularandhigherfrequencyfluctuationstothelargelystablewaveoutputaround 10Hz,butittakeseventhebestpractitionersseveralsecondstoperform .Al thoughso…     

川西亚高山暗针叶林区更新苗高生长规律

川西亚高山暗针叶林区更新苗高生长规律决定于树种的遗传潜势、季节和海拔生境。更新苗高生长每年5月中旬以后开始，直到秋初停止，苗高生长随季节变化呈“慢一快一”的趋势。测定了3种更新苗的高生长温度3基点，鳞皮冷杉（Abies Squamata)高生长的温度最低点最低，其次是川西云杉（Picea balfouriana)、鳞皮云杉(P.retroflexa)最高。3种更新苗高生长的最高温度13.1C，最适温度范围都是在10-11.6C左右。上述3种更新苗连年生长量是川西云杉〉鳞皮云杉〉鳞皮冷杉，5年生苗木更新栽植后第一至第四年连高生长量呈高——>低——〉高的曲线变化。苗木更新第二年出现缓苗现象。     

考虑桩土效应的双排桩三维数值分析

在对双排桩现有研究的基础上,综合考虑桩土效应,并实现对双排桩的三雏数值模拟。针对双排桩的几个参数进行了在不同的工况下对双排桩进行的分析。分析结果表明：（1）双排桩支护体系空间效应显著;（2）双排桩相对于单排桩表现出更好的支护性能;（3）排距、桩径对双排桩的性状特点影响较大。     

A fast exact weighted subband adaptive algorithm and its application to mono and stereo acoustic echo cancellation

The fast affine projection (FAP) algorithm (Gay and Tavathia, Proceedings of the IEEE International Conference on Acoustic, Speech and Signal Processing, 1995, 3023) is known to outperform the NLMS with a slight increase in complexity, but it involves the fast calculation of the inverse of a covariance matrix of the input data that could undermine the performance of the algorithm. The block subband adaptive algorithm in (Courville and Duhamel, IEEE Trans. Signal Processing 46(9) (1998) 2359) has also illustrated significant improvement in performance over the NLMS and other frequency domain adaptive algorithms. However, it is known that block processing algorithms have lower tracking capabilities than the their sample-by-sample counterparts. In this paper, we present a sample-by-sample version of the algorithm in (Courville and Duhamel, IEEE Trans. Signal Processing 46(9) (1998) 2359) and develop a low complexity implementation of this algorithm. As a sample-by-sample algorithm, it avoids the reduced tracking capability of block algorithms. Because it does not use matrix inversion, it avoids the numerical problems of FAP algorithms. We will show that the new sample-by-sample algorithm approximates the affine projection algorithm and possesses a similar property in reducing coefficient bias that appears in monophonic and stereophonic teleconferencing when the receiving room impulse responses are undermodeled. The new fast sample-by-sample algorithm is extended for stereo acoustic echo cancellation. Simulations of echo cancellations in actual rooms are presented to verify our findings.     

快速作文教学与传统作文教学之比较

文章从广东省惠阳市快速作文课堂训练十步法（ 简称“十步法”） 为例,分别从教学思想、教学目标、教学手段和教学效果四个方面与传统作文教学相比较。通过比较,消除对快速作文教学产生的误解,提高对快速作文教学的认识,把握好快速作文教学的方法,提高快速作文教学的水平