用GNU工具链实现μCOS到ARM平台的移植     

曲波 《南京晓庄学院学报》2010,26(6):85-87

文章分析了在ARM平台上使用GNU工具链实现μCOS嵌入式内核移植的技术要点;阐述了移植的关键步骤,以及在ARM平台上移植的具体实现方法.内容包括操作系统引导及装载程序的设计、μCOS运行之前硬件环境的建立、μCOS与平台相关接口程序、串口通信程序及相关辅助性实用程序的设计等.  相似文献   

Higher education in Federally Administered Tribal Areas of Pakistan after 9/11： Problems and prospects     

Syed Hafeez Ahmad Fatima A. Junaid 《美中教育评论》2010,7(5):55-65

The troubled state of affairs in the Federally Administered Tribal Areas （FATA） of Pakistan portends serious repercussions and grave consequences, destined to affect education particularly higher education in the entire tribal belt. Ironically, no extensive study has been conducted, to investigate those dimensions of FATA higher education which have been adversely affected in the aftermath of 9/11. This exploratory study examines those areas which have been badly affected as a result of current turmoil. In fact, the higher education in FATA has its own peculiar dynamics. Inherently, the entire tribal region has very few well-maintained and properly equipped colleges. Lack of adequate educational facilities, multiplied poor security environment has aggravated the entire situation. Law and order situation in the region has undermined the already dilapidated monitoring mechanism of education department. This state of affairs provides breeding ground for extremist propensities and radical tendencies. In reality, very little attention has been devoted to reform the education system in tribal areas. The whole set up needs to be rehabilitated by taking recourse due to the proactive role of international community. The paper concludes with recommendations for policy makers besides offering new avenues for further research.  相似文献   

基于Boa的嵌入式网络服务器设计与实现     

罗海波 《柳州职业技术学院学报》2010,10(2):28-33

论述Web服务器Boa的移植以及改进程序,并分析其设计思路。在此基础上,总结了该系统的特性。  相似文献   

Premiums,announcement returns and desperation in high tech mergers: A growth options analysis     

Sean M. Davis  Jeff Madura 《The Journal of High Technology Management Research》2017,28(1):61-78

We examine the announcements of high tech mergers using a relatively new proxy for growth options we call “growth to book.” We find this adds significantly to help explain the premiums paid and announcement period abnormal returns when acquiring tech targets. Higher synergies are expected by managers and investors when targets have low growth options and acquirers have high growth options, resulting in higher premiums paid and either less negative or more positive abnormal returns. However, we find significant variation in the results by the relative size of the target and when low growth to book (GTB) firms acquire. While high GTB acquirers tend to pay more in premiums, low GTB acquirers can pay higher premiums and receive some of the most negative returns at announcement. We find evidence some acquisitions are motivated by desperation as these acquirers have the lowest GTB and do a disproportionate number of the relatively largest deals, receiving the worst abnormal returns at announcement.  相似文献   

基于模糊控制的温湿度无线监控系统     

郭鹏  刘振永  杨彦彬  张玮 《石家庄学院学报》2009,11(3)

介绍了一种用于纺纱车间的温湿度无线监控系统．以STC89C58RD＋单片机为核心实现温湿度采集和控制．通过无线传输模块PTR2000实现单片机与上位机、单片机与单片机之间的无线通信．针对现实环境中温湿度控制大时滞、非线性、难以精确建模的特点,单片机采用模糊控制算法实现对温湿度的自动控制．系统具有良好的适应性和稳定性,操作简便,较好解决了纺纱车间对温湿度要求高、人工调节不便的问题．  相似文献   

嵌入式Web服务器设计与实现     

张同光 《人天科学研究》2013,(3):139-142

基于ARM10平台的嵌入式Linux,研究了嵌入式Web服务器的设计,并成功实现了对嵌入式Web服务器的远程访问。  相似文献   

论9．11之后的美国学校公民教育     

陈平 《外国教育研究》2007,34(10):66-70

美国学校的公民教育历史悠久,且深入人心。在9.11事件之后,美国学校公民教育的特点主要表现为:深化爱国主义的内涵,寻求国民身份共识;联邦与州政府通过立法、立项,加强对学校公民教育的管理与支持;学校注重围绕公民知识、公民技能、公民气质,进行综合培养与训练。  相似文献   

“9．11事件”之后美国高等教育国际化的四个趋向   总被引：1，自引：0，他引：1  

李联明 《外国教育研究》2007,34(5):52-54

"9.11事件"的发生,对美国高等教育产生了深远影响。在其后的几年时间中,美国高等教育国际化表现出对赴美留学国际学生签证和学科加以限制、学生赴海外留学目标国家多元化、划拨专款加强外语教学和围绕恐怖袭击开设敏感性区域研讨性课程等趋向。  相似文献   

实验室环境温湿度无线监测系统设计     

冯达  张震坤  余轩  廖媛敏 《实验室研究与探索》2012,31(2):22-25,49

为了实现实验室试验环境温湿度的实时监测、多点无线测量、自动记录等功能,设计了一种实验室温湿度无线监测系统,并介绍了该系统的工作原理和硬件结构,分析了软件流程。该系统由无线单片机芯片CC1110和温湿度传感器SHT11构成数据采集端和发送模块;由CC1110、FLASH存储器、液晶显示、串行接口等电路构成数据接收模块,并与计算机连接。计算机监控程序负责处理接收模块传来的数据,并将其存储到数据库SQL Sever;通过监控画面显示实时数据和随时间变化的趋势曲线;检测员可通过计算机监控程序随时调用环境温湿度历史数据。经过实际应用证明,该系统性能良好,具有稳定、精度高、操作方便等特点。  相似文献   

基于ARM的TFT—LCD液晶显示图像控制系统研究     

孙林军  贺锋涛 《黄冈师范学院学报》2012,32(3):41-45

本文针对IL19320型号的TFr—LCD液晶,设计了基于ARM的液晶图像显示控制系统。对液晶显示模块的接口、指令、工作模式进行了详细介绍。通过对ARM及液晶初始化、写入图像程序,实现了在液晶上显示240。320大小的图像信息,验证了基于ARM显示图像控制系统的正确性。此系统可广泛应用于便携式设备及光学领域。  相似文献