YT15车刀切削T10A钢的刀具寿命研究

采用多因素试验方法,对YT15硬质合金不重磨式车刀切削T10A钢的刀具寿命(耐用度)进行了研究,建立了刀具寿命的数学模型,从而实现了切削数据的计算机处理。     

CKWJ—A型烟草仓库微机监控系统接口电路的设计

本文介绍了CKWJ-A型烟草仓库微机监控系统接口电路的设计。它包括了温度转换电路,湿度转换电路,为温、湿度转换电路共用的放大电路,A/D转换电路等的设计,它能巡回采集湿度的数据,同时直接控制空调机和去湿机,还可以处理火、盗警的探测及报警。图8,表1,参5。     

一种Noether耦合的OSp（N／4）超引力拉氏量

用Noether耦合方法,在求得了超对称Noether流和内对称Noether流后,引入规范场、引力微子场、Yang—Mills场及费米场之间的相互作用,构造了OS_P(N/4)超引力的拉氏量,并证明了其不变性。由于得到超对称Noether拉氏量和内对称Noether拉氏量,使该理论包含有更广泛的各场的自相互作用和它们之间的相互作用,可将四种相互作用包含其中。     

Mitochondrial permeability transition triggers the release of mtDNA fragments

Fragments of mitochondrial DNA are released from mitochondria upon opening of the mitochondrial permeability transition pore. Cyclosporin A, an inhibitor of pore opening, completely prevented the release of mitochondrial fragments. Induction of mitochondrial permeability transition and subsequent release of the fragments of mitochondrial DNA could be one cause of genomic instability in the cell.Received 22 September 2004; received after revision 11 October 2004; accepted 18 October 2004M. Patrushev, V. Kasymov and V. Patrusheva contributed equally to this work.     

Evidence for hydrogen-deuterium exchange in viral particles

Heavy water (D2O) could enhance thermostability of some viruses. However, the underlying mechanism is not clear. Here we report the development of a matrix-aided gas-isotope-ratio mass spectrometry method that allows direct determination of deuterium/hydrogen (D/H) ratio in D2O-treated Japanese encephalitis virus (JEV), hepatitis A virus (HAV) and RNA from D2O-treated HAV. The D/H ratiowas expressed as δDSMOW. Our experiments showed that δDSMOW values increased significantly in D2O-treated viral samples compared to normal controls, and increment in δDSMOW of D2O, treated viral samples was in a fine linear relationship with increment in amount of samples loaded in BSA matrix. Our experiments also indicated that increased δDSMOW of D2O-treated virus correlated well with its enhanced thermostability. The results suggested that hydrogen-deuterium exchange occurred in viral particles and its RNA structure as a result of D2O-treatment. Furthermore,such exchange could cause changes in viral phenotype, such as enhanced thermostability.     

基于软件无线电的全数字扩频调制的实现

基于软件无线电的技术,给出了一种通用可编程调制器的设计方案,即用DSP DDS的组合实现全数字调制的软件无线电平台.并在此基础上实现了直接序列扩频(DS SS)和跳频(FH SS)2种扩频方式,体现了用软件编程实现不同扩频方式的灵活性,同时给出了其程序流程.     

基于PCI2040与TMS320C6201的高速雷达信号采集处理系统

阐述了PCI2040总线结构以及PCI和TM3320C6201的接口原理.基于二者构建了高速的雷达信号采集处理系统,能够对数据进行实时处理和分析,并给出了数据处理流程图.     

广义逆A_(T,S)~((2))存在性的一种新的充要条件及其表示式

给出了A的广义逆A_(T,S)~((2))存在性的一种新的充要条件及其表示式,并由此得到A的加权Moore—Penrose逆A_(M,N)+,Moore—Penrose逆A+,Drazin逆A_d及群逆A_g存在性的一种新的充要条件及相应的表示式.     

基于DTT6C01A芯片的SCDMA手机终端的信号处理

介绍了无线通信基带处理芯片DTT6C01A的结构和性能特点以及芯片内嵌ZSP400和ARM946E内核的子系统特征；进一步介绍了SCDMA手机射频模块的组成以及射频通道的发送、接收过程。并详细阐述了中频本振的选取方法；简单介绍了DTT6C01A与射频模块接口方法以及基带数字信号处理单元的工作过程，并给出了射频接口初始化的C语言源程序。     

非线性发展方程的新精确解

提出寻找非线性发展方程精确行波解的新的直接截断展开法，用此方法研究了一个广义非线性物理模型．经行波法约化方程，根据领头项分析，给出了这个模型的一个变换，并把它变换为一个新的非线性方程，利用函数展开方法和非线性立方Klein-Gordon方程的解，获得非线性发展方程丰富的精确行波解，其中包含孤波解、周期波解、有理函数型孤立波解、雅可比椭圆函数解．本方法简单而有效，可推广应用一类非线性模型的求解．