共查询到20条相似文献，搜索用时 500 毫秒
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何丹 《襄樊职业技术学院学报》2010,9(6):28-30
本集成运算放大器参数测试仪,以单片机AT89S52为核心,由可编程键盘、显示接口芯片8279构成的键盘、显示电路、MAX191的A/D转换等模块组成。设计中采用了模块化的设计方法,实现了对集成运算放大器输入失调电压、输入失调电流、交流差模开环电压增益和交流共模抑制比参数的测量。 相似文献
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本文介绍了8279键盘显示接口芯片在电子显示屏中的应用,由于它能自动进行动态扫描,又能与LED阵列构成独立的模块,从而使整个系统变得规则简单。 相似文献
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王为国 《中国基础教育研究》2008,4(8)
文章采用ZLG7290芯片,能驱动8位共阴式数码管的智能显示驱动芯片。该芯片不仅可连接多达64键的键盘矩阵,而且还支持12C通讯接口,节省与单片机的连线。单片可完成LED显示、键盘接口的全部功能。文中给出了详细单片机原理设计与通讯接口编程。 相似文献
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本文以RT1602C为例,系统地介绍了市场上常见的基于HD44780芯片的字符型液晶显示模块的接口定义和指令系统.设计了字符型液晶显示模块与AT89S52单片机的硬件接口电路,编写了实用的软件控制程序,对字符型液晶显示模块的接口设计具有一定的通用性和借鉴意义. 相似文献
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潘小琴 《宁波职业技术学院学报》2007,11(2):52-54
介绍了基于单片机的用红外遥控器替代键盘的接口电路设计过程。该设计利用单片机接收红外遥控器的指令并向PC机发送相应键盘数据,从而用红外遥控器替代键盘对计算机进行操作。 相似文献
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基于MSP430F5438A单片机的交流变频器的设计 总被引：1，自引：0，他引：1
设计的交流变频器由MSP430单片机电路、数码管显示和键盘电路、二极管整流电路、二极管整流保护电路、IPM模块电路等几个模块电路组成.数码管显示及键盘模块电路和IPM模块电路由单片机直接控制;电压整流部分是由二极管整流电路及其整流保护电路来控制;最后由单片机产生6路SPWM脉冲来实现对三相交流电机转速的开环控制. 相似文献
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本SOPC系统在Altera公司Cyclone系列芯片EP1C6Q240中移植Nios Ⅱ嵌入式处理器,作为核心控制电路;利用FPGA丰富的可编程逻辑资源和IP软核构成嵌入式处理器的接口模块,实现对SDRAM存储器、FLASH存储器、LCD液晶显示器、独立键盘、LED等硬件的控制;软件设计采用开源的uC/OS-Ⅱ嵌入式实时操作系统,完成一个嵌入式系统硬件设计.经调试运行,在该系统上成功进行了推箱子游戏,验证了基于FPGA硬件设计的可行性,实现嵌入式实时多任务软件的开发. 相似文献
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针对HIC998(3)T型IC卡电话机采用矩阵式键盘接口在"3C"认证测试中出现电磁干扰(EMI)超标的问题,设计出智能化键盘进行升级改造,新键盘采用单口线A/D转换式键盘布局和I2C接口通讯的方案。通过对比实验测试证明该方案性能明显改善,且实现模块化标准电路后易于推广应用。 相似文献
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林 《金华职业技术学院学报》2005,5(3):5-8
为解决多行水稻直播机的显示占用CPU时间过多的问题，本文提出了一种基于单片机的键盘显示接口电路的设计和实现方案。根据水稻直播机监测要求，选择8279芯片来实现监测过程中所需的键盘和显示接口电路，并给出具体设计的完整电路图和流程图。 相似文献
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对构建高等职业教育综合实践课程的研究 总被引：1，自引：0，他引：1
在我国高等职业教育起步较晚,课程建设以及课程类型、课程结构和课程模式建设上更需改变传统的分科课程模式,构建新的课程体系。在高等职业教育课程体系中构建一种“以工作项目为核心的模块式综合实训课程”,以加强学生综合运用技术能力的培养。 相似文献
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Michael J. Salvo 《Technical Communication Quarterly》2002,11(3):317-337
This article proposes a model for critically engaging technology in technical communication graduate curricula. While computers and writing studies concentrates on academic writing, the development of the field provides a model for engaging technological issues in professional and classroom contexts. Technical communicators have an ethical as well as intellectual responsibility to engage the interface between technology and culture. This article describes one example, a graduate class in information architecture, as a model for engaging the nexus of literacy, technology, and culture. 相似文献
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《Technical Communication Quarterly》2013,22(3):317-337
This article proposes a model for critically engaging technology in technical communication graduate curricula. While computers and writing studies concentrates on academic writing, the development of the field provides a model for engaging technological issues in professional and classroom contexts. Technical communicators have an ethical as well as intellectual responsibility to engage the interface between technology and culture. This article describes one example, a graduate class in information architecture, as a model for engaging the nexus of literacy, technology, and culture. 相似文献
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传统的大学英语教学模式已不能适应新时期的教学要求;新的大学英语教学模式应从课一堂教学转向基于网络的多媒体教学。 相似文献
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Troy Swanson 《Community College Journal of Research & Practice》2013,37(11):877-894
It is a time for a new model for teaching students to find, evaluate, and use information by drawing on critical pedagogy theory in the education literature. This critical information literacy model views the information world as a dynamic place where authors create knowledge for many reasons; it seeks to understand students as information users, and emphasizes that information “evaluation” is a continual process during research. This model centers libraries within the curriculum as the experts on overcoming many of the obstacles to conducting successful research in the ever-changing information world. 相似文献
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Saving Kuhn from the Sociologists of Science 总被引：1，自引：0，他引：1
For many in the science education community Kuhn is often closely identified with a sociological approach, as opposed to a philosophical approach, to matters raised in his book The Structure of Scientific Revolutions. This paper is an attempt to liberate Kuhn from too close an association with the sociology of scientific knowledge. While Kuhn was interested in some sociological issues concerning science, e.g., how to individuate communities of scientists, many of his other interests were not sociological. In fact in later writings he was quite hostile to the claims of the Strong Programme. This difference in his post-Structure writings is explored, along with his model of weighted values as an account of theory choice. This model has little in common with the model of theory choice advocated by Strong Programmers and much more in common with traditional philosophical concerns about theory choice. 相似文献
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高峰 《衡阳师范学院学报》2000,21(6):113-115
分析了传统的物理实验教学模式的优缺点,认为这种模工已不能适应现代科学技术的发展和我国的现代化建设,不利于培养学生的创新意识和开发学生的智能,因此提出一种新的实验课教学模式,论证了这种模式的可行性和合理性,进而肯定这样的教学模式将有利于培养学生的综合素质及提高学生对实验课的兴趣。 相似文献
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Koreans have been successful in nesting their educational achievement into places like China and the United States, where they have earned the title of ‘model minority’. This research is a comparison of the manner in which the model minority stereotype is handled by Korean Chinese and Korean Americans. The gathered data leads us to argue that ethnic Koreans in China and the US construct a multi‐faceted meaning in reaction to the ‘model minority’ stereotype. The meaning complicates the model minority stereotype through capitalising upon a shared East Asian sense of cultural superiority to other ethnic groups while strongly emphasising its economic marginalisation and limitations. This results in valuing education as a practical means for achieving economic upward mobility or sustaining ethnic culture and identity that is perceived as being unique to Koreans in the two different sociopolitical contexts. 相似文献
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Ronald W. Roskens 《Research in higher education》1983,18(3):285-297
The Biglan model is a three dimensional classification scheme wherein 35 academic subject areas are categorized into one of eight categories: soft-nonlife-pure; soft-life-pure; soft-nonlife-applied; soft-life-applied; hard-life-applied; hard-life-pure; hard-nonlife-pure; or hard-nonlife-applied. A basic assumption of the Biglan model research is that the types of faculty productivity differ in accord with academic subject areas. Though research studies report the importance of recognizing performance differences among faculty in different disciplines and subject areas during the faculty evaluation process, they do not present means by which this knowledge can be applied. This study discusses the practical implications of Biglan model research and the importance of university-level administrators recognizing differences in faculty productivity whenever faculty credentials are reviewed for advancement. This study also examines Biglan's original research and his model, as well as the major studies conducted to test the model. Also, the model is presented and explained as a conceptual framework for assisting administrators in the faculty evaluation process. Lastly, the reasons for employing subject area standards, as opposed to university-wide or single discipline standards, are argued. 相似文献
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张图云 《贵州教育学院学报》2006,17(4):1-6
对《周易》筮法中用于确定爻符的揲计算方法进行了研究,发现至少需要使用四个量:总策数T、揲策数M、变易次数C和最小结果数R,才能对这种算法进行较全面的数学描述。这些量在揲计算定理中表达为T=(R 2C)M。 相似文献