一种RS232串口与RJ45以太网接口转换器的设计与实现

本文提出了一种RS232串口与RJ45以太网接口转换器的设计方案,给出了转换器的总体结构和硬件电路以及工作过程和程序流程,该转换器成功应用于风机监测系统的改造项目。     

大分子在固/液界面的吸附行为及应用

由于链状大分子(聚合物)结构的柔韧性和具有一定内旋自由度,所以当它们吸附于界面时,呈现出独特的性质.文章综述了大分子在固/液界面吸附时的概念、特征及影响因素,并对聚合物吸附的应用做了总结.     

PC机打印口的通用输入输出控制板研制

就使用并口进行计算机工业控制和微机接口实验进行了探讨,推出了一款基于计算机并口连接的通用控制板。可广泛用于计算机控制和输入输出实验,且高效方便。可以使用通用开发语言,如86系列汇编语言、VB和VC 进行开发。对高等院校及中等专业学校计算机接口技术及PC计算机控制实验、一般工业设备的自动化控制等领域有较强的实用性。     

用VB进行串口实时数据采集

介绍了COP8AME单片机演示板的RS - 2 32通信协议和利用VB中的ActiveX控件MSComm实现Windows98下PC机与演示板之间的串行通信和数据采集处理。     

基于并行接口多功能信号发生器的设计与实现

利用PC机并行口向DAC输出数字量,通过软件的方法可以选择波形,调节频率和幅度。本文给出了硬件接口电路和相应的软件过程。     

幼儿园环境创设中交互式界面的设计

界面作为幼儿园环境空间的围合体与人们最敏感的视觉有着直接的关系,它既是幼儿园对外展示园所文化的主要介质,又是园内所有幼儿获得生活经验的重要语言。因此,交互式的界面设计在幼儿园环境创设中就显得尤为重要。塑造有连续性的故事情节体验、易识别的环境语言、有吸引力的场所感受是我们提升幼儿园环境的主要途径,更是打造幼儿园园所文化的主要手段。     

Performance evaluation of minimum quantity lubrication by vege- table oil in terms of cutting force, cutting zone temperature, tool wear, job dimension and surface finish in turning AISI-1060 steel

In all machining processes, tool wear is a natural phenomenon and it leads to tool failure. The growing demands for high productivity of machining need use of high cutting velocity and feed rate. Such machining inherently produces high cutting temperature, which not only reduces tool life but also impairs the product quality. Metal cutting fluid changes the performance of machining operations because of their lubrication, cooling and chip flushing functions, but the use of cutting fluid has become more problematic in terms of both employee health and environmental pollution. The minimization of cutting fluid also leads to economical benefits by way of saving lubricant costs and workpiece/tool/machine cleaning cycle time. The concept of minimum quantity lubrication （MQL） has been suggested since a decade ago as a means of addressing the issues of environmental intrusiveness and occupational hazards associated with the airborne cutting fluid particles on factory shop floors. This paper deals with experimental investigation on the role of MQL by vegetable oil on cutting temperature, tool wear, surface roughness and dimen- sional deviation in turning AISI-1060 steel at industrial speed-feed combinations by uncoated carbide insert. The encouraging results include significant reduction in tool wear rate, dimensional inaccuracy and surface roughness by MQL mainly through reduction in the cutting zone temperature and favorable change in the chip-tool and work-tool interaction.     

基于MATLAB的信道编码教学实验软件设计与实现

介绍了基于MATLAB的信道编码教学实验软件，主要包括实验操作界面制作以及循环码和卷积码编译码。     

快速凝固理论研究进展与展望

综述了国内外在快速凝固理论方面的最新研究进展,对快速凝固理论的未来发展做了进一步的展望。     

HAX8000SN专用网程控交换机话务台系统

介绍ISDN基本用户—网络接口的基本规程，研究和开发ISDN基本用户—网络接口的关键技术，并应用于HAX8000SN专用网程控交换机话务台系统。