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随着LCD显示器取代CRT显示器的迅猛发展趋势，两种显示器的优缺点成为人们关注的对象，本文重点从工作原理、基本特性方面对两种显示器进行了详细介绍，使用户全面了解这两种显示器。 相似文献
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从上个世纪至今，显示器的发展已经经历了CRT(阴极射线管)、LCD(液晶显示器)、PDP(等离子体)等几个阶段，其中各有各的优缺点，比如，CRT笨重，但色彩丰富；LCD和PDP轻薄，但色彩表现力远远逊色于CRT。本人将综合以上各种显示器的优点，试图设计一种表现更为突出的显示器，我将它命名为“激光投影显示器(LPD Laser Projection Display)”，希望我能为显示器的发展做出一点微薄的贡献。 相似文献
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人们在使用计算机后,关机时往往不切断总电源,使得主机、显示器及其他外设始终处于待机状态。这样做一方面是由于远程控制工作的需要,另一方面则是人们的一种习惯。根据调查和实际测量,1台计算机主机的待机功耗在5W左右,1台17英寸的CRT显示器的待机功耗为10W左右,一台小型激光打印机的待机功耗为60W左右,一台30W计算机音箱的待机功耗为5W左右。 相似文献
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上期和大家聊了液晶显示器的调节按钮,这期和大家侃侃CRT显示器的调节按钮吧!这是一款SONY牌CRT显示器的调节按钮(图1),看上去和液晶显示器的没有区别吧! 相似文献
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在用汇编语言编程时,计算机中的数据通常是按二进制形式进行处理和存储的,但在有些情况下,却需要我们分别按二进制、十进制和十六进制等形式在CRT显示器上显示,如何将它们进行转换？本文给出具体的实现方法. 相似文献
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吴金洲 《中小学实验与装备》1994,(6)
中小学微机硬件配置及选择吴金洲随着时代的发展，计算机已进入到社会领域的各个方面。学习计算机知识，掌握计算机的应用是未来人类必备的一种基本技能。微机的硬件部分主要由以下部件组成：主板（含ＣＰＵ）、内存、软盘驱动器、硬盘、显示器、键盘、机箱及电源等。中小... 相似文献
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当光纤信道中的光损耗幅度出现较大且快速变化时,在接收端为了能快速地跟踪光信号强度变化、输出稳定信号,文中利用交流耦合接收技术,同时根据光纤传输信道要求,采用8B／10B信道编码技术。使用光损耗快速变化的光纤传输信道对接收组件进行了视频传输实验,在信道光损耗连续变化情况下,视频监视器的输出图像显示正常,无抖动,具有响应速度快和信号输出稳定的特点,满足系统设计要求。 相似文献
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研究用内腔式He-Ne激光器做光源时,硅光电池实验中光电检流计读数不稳定的现象。利用硅光电池分别观测在不加偏振片、加上偏振片时内腔式He-Ne激光器输出的光强度,得到激光经偏振片后输出光强随时间而变。利用共焦扫描干涉仪扫描出激光束的各个纵模,实验表明,内腔式He-Ne激光器每个纵模的偏振方向随时间缓慢变化,引起了实验中输出的光强变化。 相似文献
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虚拟仪器的结构特点及研究进展 总被引：3，自引：0，他引：3
虚拟仪器是利用计算机显示器(CRT)的显示功能模拟传统仪器的控制面板,以多种形式表达输出检测结果,利用计算机强大的软件功能实现信号数据的运算、分析和处理.由I/O接口设备完成信号的采集、测量与调理,从而完成各种测试功能的一种计算机仪器系统. 相似文献
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This article explores the territory that has been covered since the publication of Ladson-Billings and Tate's 1995 article, “Toward a Critical Race Theory in Education.” We organize our review of the CRT literature is organized around what we are calling CRT “boundaries.” We identify six boundaries for CRT and education: 1) CRT in education argues that racial inequity in education is the logical outcome of a system of achievement presided on competition; 2) CRT in education examines the role of education policy and educational practices in the construction of racial inequity and the perpetuation of normative whiteness; 3) CRT in education rejects the dominant narrative about the inherent inferiority of people of color and the normative superiority of white people; 4) CRT in education rejects ahistoricism and examines the historical linkages between contemporary educational inequity and historical patterns of racial oppression; 5) CRT in education engages in intersectional analyses that recognize the ways that race is mediated by and interacts with other identity markers (i.e., gender, class, sexuality, linguistic background, and citizenship status); 6) CRT in education agitates and advocates for meaningful outcomes that redress racial inequity. CRT does not merely document disparities. We suggest that these core ideas provide a framework for analyzing the work that has been done in education in the past and a way to determine what might be left to do. 相似文献
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Critical race theory (CRT) offers educational researchers a compelling way to view racism in education by centering issues of race and using counterstories to challenge dominant views in both research and practice. This article provides an overview of CRT and illuminates the dilemmas for white researchers wishing to incorporate CRT into their work. The author argues that while CRT may not be fully open to white researchers, their strategic use of CRT can help legitimize its use in fighting racism in educational settings. Building on her participation in CRT discussions in a mixed-race setting, the author suggests that white researchers must work to center race in their personal lives and work, engage in the strategic and sensitive use of CRT, and join in the effort to legitimize research that utilizes alternative methods such as CRT. 相似文献
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R. Nicole Johnson-Ahorlu 《The Urban Review》2017,49(5):729-745
Critical Race Theory (CRT) scholars in Education, like activists, are intent on dismantling racism in education (and society at large), and often do so by engaging the problem of racial injustice through social science research. CRT research creates a wealth of awareness about how racism functions, and as a result, inspires social agency to create a more just society. This conceptual piece explores how CRT research, when joined with the efforts of activists, is even more potent with capacity to realize social justice. In the paper, the tenets of CRT in Education are outlined, and serve as the foundation of a model that reveal how each tenet can shape research designs, that inform decision making in social movement strategy development. The model is inspired by the author’s personal experiences with combining CRT research with social movement strategy development, and is intended to serve as an impetus for increased dialogue about how CRT social science research, particularly in Education, can support activists’ goals to dismantle racism. 相似文献
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介绍3S在土地利用动态监测中的集成应用,比较了传统方法与3S的利弊;主要利用GIS、GPS、RS的集成技术,提出利用3S技术进行土地利用动态监测的一般工作程序,借助GIS的输出成果可分析土地利用变化趋势及原因,了解不同时期土地利用类型的分布、面积大小、认识不同时期的土地利用特点,为土地监察工作的开展和土地利用规划的编制提供技术支撑,同时也为土地利用与土地管理提供决策依据. 相似文献
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Zeus Leonardo 《Educational Studies A Journal of the American Educational Studies Association》2013,49(5):427-449
This article is intended to appraise the insights gained from Critical Race Theory (CRT) in Education. It is particularly interested in CRT's relationship with Marxist discourse, which falls under two questions. One, how does CRT understand Marxist concepts, such as capital, which show up in the way CRT appropriates them? The article argues that Marxist concepts, such as historical classes, class-for-itself, are useful for race analysis as it sets parameters around the conceptual use of historical races and a race-for-itself. Two, how does CRT understand the role of capitalism, therefore shedding light on its position regarding the class problem? It is no doubt attentive to class power, but this is not the same as performing an immanent critique of capitalism. As a result, within CRT class achieves a color whereby class becomes a variant of race, better known as classism. Race becomes the theory with class vocabulary superimposed on it. Last, I suggest areas where CRT could combine with Marxism in order to forge a Critical Raceclass Theory of Education. 相似文献