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With the increase of gray scale and flat panel display (FPD) size, subspace bitwise scanning strategy can be replaced traditional
scanning method to cut down frame frequency. However, the direct searching strategy (DSS) becomes unfeasible to obtain corresponding
high gray scale scanning matrix. Thus, particle swarm optimization (PSO) is introduced to accelerate searching for high gray
scale weights scanning matrix (WSM) with its parallelism and global optimization feature. Finally a WSM of 256 gray scales
is found out successfully with Matlab, which both gray linearity and scanning efficiency are satisfied. 相似文献
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现代无线通讯技术的发展使得移动警务系统的实现成为了可能，本文介绍了一个完整的基于JAVA技术的移动警务系统的构建与实现，主要从系统总体设计和系统安全方面提出了完整的移动警务系统的解决方案。 相似文献
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英语中含有诸多同义词,学习者在习得这类词汇时经常会遇到辨析困难。而利用在线SketchEngine工具辨析英语同义词能有效解决这一问题。以辨析英语同义词assure和ensure为例,运用在线Sketch Engine工具进行检索和对比分析,能得到更加客观、可靠的辨析结果。两词有着共同的正式语体倾向,部分相似的类联接,其宾语搭配词的语义韵也趋向一致,但两词在具体语域中分布差异明显。另外,部分类联接、搭配词等方面也存在明显差异。 相似文献
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Protel 99SE软件是专门用于电路原理设计和印刷电路板设计的EDA工具软件。本文通过数字电压表的设计实例探讨了在电子技术课程设计中引入计算机设计技术的意义和方法。 相似文献
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本文针对普遍采用结构化分析的软件工程的管理信息系统程序繁杂、可维护性差、效率低的缺点,提出了一种基于OOSE和UML的系统分析和设计方法。该系统具有运行可靠、高效、查询方便、可扩展和易维护的特点。 相似文献
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谢永平 《南通师范学院学报》2008,(2):80-85
徽商势力的兴起与东南城镇经济的发展演变在时间上是同步的。明代成化、弘治年间,徽商随着东南城镇经济的发展初步形成;嘉靖、万历年间,徽商随着东南城镇经济的繁荣而壮大;明清之际,东南城镇惨遭破坏,徽商势力也因之而受挫;清代康熙、乾隆年间,东南城镇经济的发展超过了明代的水平,徽商势力也进入了它的鼎盛时期。徽商的兴起与东南城镇的发展存在着密不可分的联系。 相似文献
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林蔚 《Journal of Zhangzhou Technical Institute》2007,9(2):16-18
Protel99由于其功能完善、易于掌握和使用方便等特点,成为最为流行的电子设计自动化工具。通过实例论述仿真分析电路的具体方法。 相似文献
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Chunjia Han Stephen Rhys Thomas Mu Yang Petros Ieromonachou Hongru Zhang 《The Journal of High Technology Management Research》2017,28(1):93-109
Research and development (R&D) investment activity plays a crucial role in developing high-tech industries. In recent decades, China has made sustained investments in its domestic high-tech industries, with the goal of increasing their productivity. This paper investigates the effect of this investment on relative R&D efficiency across China's high-tech sectors. Data Envelopment Analysis (DEA) was used to generate quantitative indices for sector comparisons. The analysis of this study indicates that overall R&D investment efficiency did not increase from 1998 to 2009, despite R&D expenditure increasing by 2188%. Over the same period, most sectors suffered from decreasing returns to scale (DRS), presumably also reflecting the inefficient R&D investment. Most of the sectors showed significant fluctuation on R&D investment efficiency. This research result indicates that the problem of China's high-tech industry may be from the inefficiency of its technology commercialization processes, and therefore represents a critical parameter for policy makers and managers. 相似文献
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Protel 99SE作为电子线路CAD软件应用极其广泛,本文以一具体的555振荡器为例,介绍原理图制作流程和印制电路板制作流程．探讨制作电路板时的注意事项。 相似文献