基于MSP430F149和无线传输技术的校园空气监测系统的设计

本文设计了一种基于ZigBee和GPRS的无线传输技术,即以MSP430F149为核心控制器的校园空气监测系统,实现了校园空气质量的实时监控与无线数据传输和发布。为方便师生了解校园空气质量状况,合理安排教学和课余生活具有一定的参考价值。     

基于STM32平台实现UCGUI外挂中文字库

在使用图形系统UCGUI显示字符时,需要程序员事先将可能用到的字符点阵信息转化为c语言数组连同程序代码一起进行编译,这对于字符数量巨大的汉字来说,不仅工作量巨大,且会导致编译后的目标代码体积过于庞大,甚至超过内部程序Flash的容量限制．本文提出在STM32或类似平台上外扩Flash存储芯片,并将中文字库独立于程序代码存放在外部Flash中,然后通过修改UCGUI的底层字符显示驱动,实现在UCGUI运行时实时读取外部字库来随机显示汉字,克服了UCGUI在汉字显示方面的固有缺陷,使之更适合于中文界面的场合．本方案已经用于某品牌无线点菜系统的手持机上,实际运行效果良好．     

高职“嵌入式应用开发”技能大赛与教学改革

通过参加广西区及全国高职"嵌入式应用开发"技能大赛,指导教师团队跟进了当前主流的嵌入式应用开发技术,同时为下一步开展教学改革积累了技术经验。以柳州职业技术学院计算机应用技术专业(嵌入式方向)为例,结合本专业的实际情况,将开展三个方面的改革与完善:1)将"移动智能终端应用软件项目"引入当前的课程体系中;2)引入"STM32单片机应用技术"课程;3)强化单片机与移动智能终端的字符处理编程能力。     

基于C8051F020的动感单车无线数据传输系统设计

采用C8051F020单片机、HK-08A心率传感器、霍尔传感器A3144E和无线收发模块NRF24L01设计动感单车控制系统和无线数据传输系统。发送端C8051F020单片机实时监测心率传感器输出的心电信号和霍尔传感器输出的反应动感单车转速的脉冲信号,并对其进行处理,通过NRF24L0无线发射模块实时发送监测数据到监控中心;监控中心通过C8051F020单片机和无线接收模块NRF24L01对接收到的监控数据进行解码,解码数据通过监控中心C8051F020单片机串口发送到上位PC机。上位PC机控制界面通过VC＋＋6.0编程实现,可以读取多个发送端的数据,并实时显示数据波形和存储数据,方便运动者实时查看和比对。本系统可以无线接收、实时显示（存储心率和转速数据）、操作界面良好,方便应用于家庭和各种类型的健身场地。     

基于TMS320F28035的电梯门机控制器设计

针对基于DSP的电梯门机控制系统,在充分分析电梯门机控制器功能需求的前提下,提出了以TI公司DSP芯片TMS320F28035为核心的电梯门机控制器设计方案,其中包括控制器硬件的模块化设计和软件设计。对所设计的控制器进行现场试验,结果表明,门机运行平稳,速度跟随性好,控制器能够很好地完成电梯门机运行过程中的控制任务。     

扇形图与车轮图的Ramsey数

Ramsey数R（F ,H）或r（F ,H）是指给完全图 KP的边红蓝着色时,至少有一个红色子图 F ,或者蓝色子图 H的图的最小顶点个数 P ,即任意顶点个数为 P的图或者包含F或者它的补图包含 H 。得到了结论有：若n是大于10的偶数,且Δ（G ）≤ n ,｜ G ｜＝2 n＋1,则或者G包含W n ,或者G的补图包含 F2。     

F1中国大奖赛在我国的消费需求及其对地区经济影响的调查研究

就F1赛车对上海及其周边地区的影响作用,通过新秦网对全国范围内18岁以上的4 939人进行了问卷调查。调查结果表明,虽然人们对于赛车文化的理解尚未深入,但是,赛车运动在中国的发展还是很有潜力的。研究认为,F1上海站赛事将会促进上海及其周边地区消费水平的提高,对促进上海及其周边地区的区域经济发展具有巨大的影响作用。     

基于VB6.0的串行通信工控软件设计及实例

该文介绍了在工业控制系统软件设计中上位计算机与PLC(可编程序控制器)及工业仪表等设备通过串行方式进行通信的基本设计原理,硬件要求,实现方法,以及利用CB6.0实现该过程的应用实例.     

Modelling and analysis of a basilica under earthquake loading

In this paper a basilica-type church is analysed in order to assess its structural behaviour and seismic vulnerability. For this purpose, an effective two-step procedure has been used, consisting of: (a) 3D static and dynamic linear analyses of the structural complex, and (b) 2D nonlinear push-over analysis of the single macro-elements. The results obtained through push-over analyses have been compared to the collapse loads derived from limit analysis, proving the ability of finite element (F.E.) nonlinear model to provide reliable simulation of the actual response of masonry elements. Then, the strength demand on each single structural macro-elements, resulting from the 3D linear analyses, has been compared to the macro-element ultimate strength capacity. The comparison demand vs. capacity has been carried out for all transversal and longitudinal macro-elements of the church, allowing a direct, though approximate, assessment of the seismic safety level of the church. The comparison demand vs. capacity confirms the susceptibility of this type of buildings to extensive damage and possibly to collapse, as frequently observed. The insertion of rigid diaphragms, which represents a widely used retrofit technique, has also been investigated; such intervention triggers concentration of strength demand in the stiffest macro-elements, so that the seismic capacity of the building is not necessarily increased.     

Racial similarity as a moderator variable in the perception of leader behavior and control

This study compared leader behavior ratings of black and white Army infantry squad members serving in squads led either by black or white leaders. One black and one white squad member, chosen at random from each of 34 racially mixed squads, rated their leader's Consideration and Initiation of Structure behaviors (Stogdill, 1963), and their leader's behavior relevant to French and Raven's (1959) five bases of social power. In general, it was found that members who were of the same race as their leader rated him as significantly less likely to use punishment-related behaviors than did members who were of a different race than their leader. However, same-race members did not rate their leader's considerate or structuring behavior differently than did different-race members. The overall pattern of findings were discussed in terms of the leaders' implicit reliance on their punishment power to obtain compliance from different-race subordinates.