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创业公司启航,三五十来个人、七八条枪,其中"C"字开头的官儿还真少不了CEO、CTO、COO、CFO、CMO、CIO、CCO、CLO、Chairman/Chairwoman……不过,和大公司不一样,创业公司里的"C"品官不是权力、待遇、级别的标志, 相似文献
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李岗 《电子制作.电脑维护与应用》2009,(5):60-62
数字集成电路有门电路,如非门(反相器)、与门、与非门、或门、或非门、异或门,还有其他的电路如触发器、计数器、锁存器、译码器等。数字集成电路通常用DIP封装,其外接电路一般有8脚、14脚、16脚、20脚、24脚;其中有两个脚接电源,其中一个是Vdd,接电源的正极;一个是Vss,接电源的负极。学习数字电路的最好方法是通过各种电路的实验、制作,进而认识和掌握它们的应用。从本期开始,将通过实验项目讲解,非门、与非门计数器等数字电路的应用。 相似文献
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《计算机与应用化学》2014,(2)
<正>《计算机与应用化学》是化学、化工类中文核心期刊。该刊重点刊登应用化学,以及应用计算机技术在化学、化工、材料、生物技术、生命科学、医药、农药、石油化工、能源、冶金、资源与环境、系统工程、安全技术等领域中应用的原创性研究论文、研究快报、学术论坛、应用技术、软件介绍、信息交流、书讯、讲座、广告,以及评述性综述文章。来稿要求:作者须遵守《中华人民共和国著作权法》,不得一稿多投,引用他人作品时,务必在参考文献中著录,严禁抄袭,文责自负。来稿应论点明确、文字精炼、数据可靠、符号正确、治学严谨、文风勿虚。作者投稿必须使用正版软件,如使用非正版软件,其发生的相关法律责任由作者自负。属于研究生的稿件要求由导师审查后在稿件上签署姓名和日期,同意在本刊发表。属于课题研究项目和涉及密级内容的文章,须由作者单位出 相似文献
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正党的十八大提出,倡导富强、民主、文明、和谐,倡导自由、平等、公正、法治,倡导爱国、敬业、诚信、友善,积极培育和践行社会主义核心价值观。社会主义核心价值体系是兴国之魂,是社会主义先进文化的精髓,决定着中国特色社会主义发展方向。用社会主义核心价值观引领社会思潮、凝聚社会共识,深入开展中国特色社会主义和中国梦宣传教育,不断增强人们的道路自信、理论自信、制度自信,坚定全社会全面深化改革的意志和决心,是人民广播电台主要的宣讲内容之一, 相似文献
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可视对讲,在九十年代从发达国家引进,在国内得到了高速的发展。从九十年代末至今,主要应用在商品住宅楼,规模迅速发展,已经普遍进入城市小区中高层住宅。在以往,可视对讲设备只局限于访客与住户之间的双向语音通话,那么现在呢?更多的高端小区已经可以实现可视对讲通话,达到图像、语音双重识别从而增加安全可靠性,同时节省大量的时间,提高了工作效率。更重要的是,可视对讲跟智能家居结合在一起,不但家中的各种设备(如音视频设备、照明系统、窗帘控制、空调控制、安防系统、数字影院系统、影音服务器、影柜系统、网络家电等)连接到一起,提供家电控制、照明控制、电话远程控制、室内外遥控、防盗报警、环境监测、暖通控制、红外转发以及可编程定时控制等多种功能。 相似文献
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《Computers & Education》1998,31(3):329-347
The study examines the development of ICT capability by associate-trainees on a postgraduate certificate of education course. The course involves the promotion of ICT use during three classroom placements by in-school teacher-mentors. Data for the study were collected by a survey of mentors, four surveys of associate-trainees, and by the collation of associate-trainees' profiles. The study considers the perceived effects upon the trainees development of ICT capability by the course generally and the examples of ICT use provided by teacher-mentors in particular. The study indicates the beneficial effects upon the attitudes of trainees who observe ICT use by teacher-mentors on early school placements, and the coincidence of impoverished ICT use by teacher-mentors on early school placements with restricted use of ICT by associate-trainees on later placements. 相似文献
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针对目前液晶显示器斑痕(LCD-Mura)缺陷背景抑制检测中重建的背景存在引入性噪声干扰和目标缺损的问题,提出一种基于奇异值分解(SVD)和最大熵的缺陷图像背景建模方法:通过SVD图像像素矩阵,求得奇异值序列;借助矩阵范式推导出图像分量与奇异值的对应关系,进而以图像各分量奇异值所占比率计算各分量的熵值,以此利用最大熵确定重建背景的有效奇异值;再由矩阵重构得到背景,并进一步提出关于背景重建效果评价的一般方法。相比双三次B样条曲线拟合方法,该方法将区域Mura的对比度最少提升0.59倍,提升线Mura对比度最多达到7.71倍;相比离散余弦变换(DCT)方法,该方法将点Mura的噪声最少降低33.8%,将线Mura噪声降低76.76%。仿真结果表明,该模型具有低噪、低损和高亮的优点,能够更为准确地构建出缺陷图像的背景信息。 相似文献
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本文论述了Learning by Doing,Learning by Abstracting,Learning by Analogy,Learning byTeaching以及Learing by Simulating等教学模式。分析了其优点,并介绍了我们将其应用于嵌入式软件开发导论和系统结构等课程的效果。文中尤其强调了Learning by Abstracting的重要性。 相似文献
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Bainbridge L 《Applied ergonomics》1975,6(1):9-16
Measurement in many industrial and practical contexts is done by human judgement. These judgements group the possible measures into about seven categories, such as large, medium and small in relation to the expected average and range of the values. The number of categories used in judgement can be increased by allowing more time for judgement, by using multi-dimensional representations, by giving knowledge of results, and by providing a constant comparison value. The discriminating accuracy of judgement can be improved by reducing the range of values to be judged. The use of these judgements in scale reading and personal ratings is discussed. 相似文献
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Caglioti V. 《IEEE transactions on systems, man, and cybernetics. Part B, Cybernetics》2001,31(2):187-196
A criterion is presented for the automatic selection of a sensor measurement aimed at observing the state of a system which is described both by discrete variables and by continuous ones. The criterion is based on the expected value of the entropy variation associated to the sensor observation. This criterion is then applied to object recognition and localization tasks, in which the observed system is characterized by the object class, represented by a discrete variable, and by the object pose, i.e., position and orientation, represented by a vector of continuous parameters. The proposed criterion also accounts for the information obtained in the case the observed object is missed by the measurement. 相似文献
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Abstract Convective instability can be induced by unstable vertical temperature profiles and can be supported by the release of latent heat of water vapour provided by a large quantity of moisture in the air. It can also be released by the presence of gravity waves. Large amplitude gravity waves have been linked to the onset of convective storm systems. In this study, the vertical velocity of convection initiated by gravity waves was investigated. The study of Ardmore, Oklahoma, storms showed that weak convection was initiated by gravity waves having wave periods of 35 min and the convection was enhanced by gravity waves having wave periods of 20 min. Evidence for cloud formation, due to the condensation of water vapour through convection initiated by the gravity waves, was obtained from rapid-scan satellite imagery and radar summaries. In this particular case, the convective motion, initiated and supported by the gravity-wave-induced activity (excluding contributions made by other mechanisms), reached its maximum value about one hour before the production of the funnel clouds. In this study, we did not rule out the contributions made by other mechanisms, such as low-level convergence and others, toward the initiation of convection; however, our main purpose is to discuss the role of gravity waves in wave-induced convection contributing to the fractions of formation and development of severe convective storms. 相似文献