基于PC机的电加热炉温度监控系统设计

介绍了基于PC机的电加热炉计算机温度监控系统的设计方案.该系统由PC机、单片机子系统、温度检测电路、双向可控硅过零触发控制电路等组成,利用串行通信组成PC-单片机组合,具有控制灵活、价格低廉和界面友好等特点.对该系统的各组成部分的功能和PC-单片机的监控程序作了简要的介绍.     

自动排液监测系统的设计与实现

本系统是利用单片机和PC机通过串口通信实现气液分离器自动排液的监测系统。将单片机作为下位机,将PC机作为上位机,通过串行口RS-232实现串行通信。     

CPLD在陀螺仪数据采集中的应用

应用Altera公司的CPLD，实现捷联导航系统中的陀螺仪数据采集，讨论了CPLD在数据采集应用中的实际问题，如和PC104总线接口等。     

通过PC机串口控制单片机系统实现电源管理

介绍了利用PC机的RS－232串口和单片机进行通信，用单片机来控制继电器实现PC机管理各种电器设备的电源，并给出了部分程序清单。实践证明，这种方法简单、可靠，人机交互界面操作方便。     

用DSP实现实时信号采集与处理

介绍睛数字信号处理器ADSP2181芯片的主要特点，结合PC机接口及专用的A／D，D／A芯片与DSP芯片技术，设计了一种实时信号采集与处理电路。     

Neuronal growth inhibitory factor inhibits pheochromo-cytoma PC12 in vitro

Neuronal growth inhibitory factor (GIF),named Metaliothioneins-Ⅲ (MT-Ⅲ), is the first protein validated to be capable of inhibiting the growth of neurons in nervous system. We have detected the effects of recombinant GIF on the growth of neuroblastoma SY5Y and pheochromocytoma PC12 by the MTT (Thiazolyl blue) reduction assay. Recombinant GIF inhibited PC12 in vitro; the inhibitory rate was about 25% when GIF was at 100 mg/L; and the inhibitory rate was about 50% when GIF was at 300 mg/L. It is shown that PC12 could serve as a proper model for detecting neuronal growth inhibitory activity of GIF. Recombinant GIF did not inhibit neuroblastoma SY5Y in vitro, a common model of neuroma; it is also shown that GIF could not inhibit neuromata extensively. The reason for GIF inhibiting PC12 may be that PC12 have some properties of cholinergic neuron. It must play an important role in discovering the mechanism of GIF's neuronal growth inhibitory activity.``     

一种在微计算机上实现数字示波器功能的方法

介绍了在微计算机上加装多通道A／D转换卡以构成多通道信号采集系统的方法，并设计了一套专门的对数据进行处理的软件，可在微计算机上实现数字示波器的功能，该装置可在一定程度上实现信号测量、波形显示、数据存储等功能，特别是在被测信号频率很低时是一种非常好的慢扫描示波器．     

基于PC/104总线的某型飞机武器控制系统的ATS

介绍了基于PC／104总线的武器控制系统自动调试系统(ATS)的调试背景与测试需求，详细论述了测试系统的软硬件设计方案，给出了部分关键电路的具体实现。达到了武器控制系统测试自动化的目的。     

Protection of phosphatidylcholine to photosystem Ⅱ membrane during heat treatment

Photosystem Ⅱ membrane was reconstituted with phosphatidylcholine (PC) with different kinds of fatty acyl chains and the protection of PC to photosystem Ⅱ (PS Ⅱ)membrane during heat treatment was investigated using oxygen electrode, variable fluorescence and circular dichroism (CD) spectroscopy. Heat treatment decreased the oxygen evolution rate and the F′v/Fm′ ratio of PS Ⅱ membrane and influenced CD spectra of PS Ⅱ membrane, but PC inhibited the effect of heat treatment on the oxygen evolution rate, the F′v/F′m ratio and CD spectra of PS Ⅱ membrane. The results indicate that PC can protect PS Ⅱ membrane against heat treatment and the alterations in the unsaturated fatty acid extent in PC can cause the changes of the protection ability.     

网络计算机与计算机实验室建设

本文介绍了网络计算机的特点、以及以PC为主的学校计算机实验室存在的问题和NC在计算机实验室建设中的应用.