Electrostatic effect on electron transfer between cytochrome b5 and cytochrome c

The binding and electron transfer between wild type, E44A, E56A, E44/56A, E44/48/56A/D60Aand F35Y variants of cytochrome b5 and cytochrome c were studied. When mixed with cytochrome c, the cytochrome b5E44/48/56A/D60A did not show the typical UV-vis difference spectrum of absorption, indicating that the alteration ofthe surface electrostatic potential obviously influenced the spectrum. The electron transfer rates of wild type cytochromeb5, its variants and cytochrome e at different temperature and ionic strength exhibited an order of F35Y > wild type >E56A > E44A > E44/48/56A/D60A. The enthalpy and entropy of the reaction did not change obviously, suggestingthat the mutation did not significantly disturb the electron transfer conformation. The investigation of electron transfer rateconstants at different ionic strength demonstrated that electrostatic interaction obviously affected the electron transfer pro-cess. The significant difference of Cyt b5 F35Y and E44/48/56A/D60A from the wild type protein further confirmed thegreat importance of the electrostatic interaction in the protein electron transfer.     

(P(x),,,-)逻辑的语义问题

本文得出了在 (P(x) , , ,- )逻辑的语义问题中 ,标准命题演算系统的每条公理在 (P(x) , , ,- )逻辑中都是模糊恒真的 ,但标准命题演算系统的定理 ,在 (P(x) , , ,- )逻辑中却不都是模糊恒真的。     

DSP+ARM微处理器在电动机微机保护装置设计中的应用

本文提出了一套基于DSP ARM的新型电动机测控保护装置的硬件设计方案。在对电动机故障原因及总体设计思想做了分析的基础上,重点介绍了硬件构成的测控板、交流变换板、开入开出板、显示板、总线板和扩展板模块,并对电动机测控保护装置的具体设计实现和关键技术进行了论述。     

用光折变扇形效应实现非相干图像的相干转换

利用Ｂａ１－ｘＳｒｘＴｉＯ３光折变晶体的扇形散射效应实现非相干图像的相干转换，得到非相干图像的相干正转换图像，且相干输出图像有很高的保真度，分辩率可达到２８ｌｉｎｋ ｐａｉｒｓ／ｍｍ。     

基于DSP的CRC算法的实现

介绍了循环冗余校验CRC算法原理和校验规则,分析了CRC校验码的具体计算方法,给出了使用DSP来实现CRC算法的过程,完成了CRC编码器的DSP实现。最后,将仿真结果与理论值进行比较,仿真结果与理论值一致。     

关于Banach空间中ε-等距于c_0或l_1序列

本文给出Ｂａｎａｃｈ空间中ε－等距于ｃ０或ｌ１序列的若干性质．     

基于双环PID控制的磁悬浮推力轴承试验研究

针对磁悬浮推力轴承的实时控制特点，依据PID控制理论，提出了双环PID控制策略，经过MATLAB仿真和基于DSP实验．验证了其在磁悬浮推力轴承控制中的良好性能。     

32路可编程MFC/DTMF信号收发器的设计与实现

采用单片DSP实现 32路时隙MFC/DTMF的收发系统 ,系统以插卡的形式与主控板相连 ,可应用于中小型CTI交换机中 ,测试结果符合《邮电部电话交换设备总技术规范书》规定的各项技术指标 ,和同类系统相比 ,本系统具有体积小、处理密度高、性能价格比高、接口方便的优点 .