共查询到20条相似文献，搜索用时 203 毫秒
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介绍了一种电铲电气24V门电路电源模块故障引起AFE故障的检测维修方法,节省了请厂家售后维修所需要的大量费用,并总结出快速处理此类故障方法,缩减了故障处理时间,提高了设备的出动率。 相似文献
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为防患于未然,事先对故障原因进行认真分析显得尤为重要。本文主要介绍了变频器的一些常见故障处理和维修方法,并简述了其故障产生的原因及预防策略。 相似文献
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近年我国广播电视进行了大规模的固态化、数字化改造,广播事业得到了飞速发展,在新时期如何搞好设备维修工作和台站的技术维护管理工作成为重要课题,本文用10KWDX机和3KWPDM机的故障处理为例,介绍各种维修方法在固态化发射机的维修中的灵活运用,并阐述如何搞好技术维护管理工作。 相似文献
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针对AM503S5-Ⅰ型50KW DAM中波发射机运行时功放模块损坏及直流稳压器B＋电源故障较难处理的特点。本文介绍了其整机系统原理,并在日常检修维护中对这些常见故障进行了原因分析及其处理,总结出故障维修技巧,以此来快速处理故障,保障安全播出。 相似文献
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近年来,随着光纤传输技术的日益成熟发展,光纤传输设备在CATV网络中得到了广泛使用.光缆网络的维护维修方法比照以往同轴网络有着很大的差别,且光网络的故障比电缆网的故障所造成的影响与损失要严重得多,所以如何快速准确地判断处理光网故障就显得尤为重要,笔者就工作实践中所遇到的光链路故障及排除过程与同行共同探讨. 相似文献
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高低压变压器故障诊断方法能及时发现变压器潜在故障,可在变压器运行过程中进行故障分析,促进变压器从定期维修到状态维修的转变,提高变压器的运行维护水平,其研究具有重要的现实意义。 相似文献
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科技报告作为科技计划及技术项目的直接产出成果,包含了重要的前沿技术信息。如何将其中隐含的知识
挖掘出来,展示技术发展方向是一个难题。本文基于电动汽车领域的科技报告数据,采用文献计量学中的词频统计及
科学计量学中的社会网络共现分析方法,对电动汽车领域的技术现状及未来发展趋势进行了研究。研究结果表明,电
动汽车技术目前主要是混合动力、动力电池、燃料电池等方面的相关研究,未来的研发将主要集中在电力系统、电池
的安全性及可靠性、电池系统、电机的控制及仿真优化、控制策略及稳定性等方面。另外,电动汽车的产业化生产一 相似文献
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围绕信息资源规划,将为电动汽车研发管理决策提供支持的多源数据作为研究对象,借鉴Zachman框架思
路和企业架构（EA）规划方法,分析电动汽车研发管理决策支持的业务环境,提出统一的电动汽车决策支持业务框架和
数据框架,最后针对电动汽车技术规划的研发基础环节,对数据框架如何支撑决策活动、开展数据管理进行应用示例。 相似文献
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文章以DII作为数据源,运用专利计量指标,结合专利地图方法,对汽车节能技术进行了专利计量分析,结果发现美国福特公司处于汽车节能技术领先地位,而日本是在汽车节能技术领域最具竞争力的国家;电动汽车是汽车节能的重要方向,而动力装置或传动装置是汽车节能技术中最重要的环节. 相似文献
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软实力的概念是上世纪80年代末提出的,近年来软实力已经受到越来越多的关注。对于一个国家来说,提升其综合实力需要从硬实力和软实力两方面进行;对于一所大学来说,同样如此。提升大学软实力,是贯彻落实党的十七大精神,增强国家文化软实力的迫切需要;是建设高等教育强国和世界一流大学的必然选择;也是全面落实科学发展观,促进大学自身又好又快发展的内在需求。 相似文献
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Emmanuel Babatunde Ajala Reuben Abiodun Ojo 《Journal of Interlibrary Loan, Document Delivery & Electronic Reserve》2013,23(4):199-205
New information communication technologies, such as the Internet and electronic publishing, not only enhance the range of publications that libraries can provide for their users but also increase the speed with which such requests can be met. This article describes the development of electronic document delivery (EDD) at the Kenneth Dike Library at the University of Ibadan, Nigeria. A successful EDD program depends upon good intranet and Internet network systems, document availability, user awareness and training, and ease of use. The major challenge to this service is inconsistent power supply, which the university is addressing with the aid of a grant from the MacArthur Foundation for backup electric generators and a university solar energy project. It is hoped that this will assure better and more reliable power service in support of EDD in future. New information delivery regulations and laws guiding adequate service will also emerge but must be properly applied for effective and positive results. 相似文献
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Dominik Janzing 《Informatik - Forschung und Entwicklung》2006,21(1-2):83-90
Progress in controlling quantum systems is the major pre-requisite
for the realization of quantum computing, yet the results of quantum computing research can also be useful
in solving quantum control problems that are not related to computational problems. We arguethat quantum
computing provides clear concepts and simple models for discussing quantum theoretical problems. In this
article we describe examples from completely different fields where models of quantum computing and quantum
communication shed light on quantum theory.
First we address quantum limits of classical low power computation and argue that the terms of quantum
information theory allows us to discuss device-independent bounds. We
argue that a classical bit behaves to some extent like a quantum bit in the time period where
it switches its logical value. This implies that a readout during the switching process generates
entropy. A related problem is the distribution of timing information like clock signals in low power
devices. For low signal energy, the situation is close to phase-covariant cloning problems in quantum information
theory.
Second we rephrase a classical statistical method to draw causal conclusions from data of a clinical
drug-testing experiment. Since this method, as it is described in the literature, relies on a hidden-variable
model of patient’s behaviour it leads to misconclusions if quantum theory infact does play a role in
the human mind. The toy model we use to illustrate this is formally a quantum communication protocol
in the presence of entanglement. We argue that quantum information theory could put classical statistical
reasoning on a safer basis because it does not need hidden-variable models of nature. 相似文献
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《Communication monographs》2012,79(3):181-211
While communication scholars place considerable emphasis on skill training, the systematic study of adult communication‐skill acquisition has lagged behind the study of skilled performance in other fields and behavioral domains. It is particularly noteworthy that we know very little of the course of skill acquisition over time or of the role of repeated learning trials in skill development. One of the aims of the research reported here was to establish an experimental paradigm that would permit systematic investigations of such issues. This paradigm was then employed in three studies involving a total of 1,830 messages. In Study 1, the course of skill acquisition in message production conformed to the same sort of power law that characterizes skill development for relatively simple motor and cognitive responses. Indeed, the power model accounted for an average of 71 percent of the variance in the time required for subjects to complete a message‐production task. In Study 2, which had slightly different message‐production instructions, the power model accounted for an average of 53 percent of the variance in message‐production time. Finally, in Study 3 the power model appeared to apply, even when the number of message trials was doubled, and also to characterize the course of performance improvements when message trials were resumed after a delay of several days. Methodological and theoretical implications of these findings are discussed. 相似文献
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《Library Collections, Acquisitions, and Technical Services》2001,25(3):323-328
Even though a substantial amount of the library materials budget may be allocated for standing orders, this method of acquisition is frequently not given the same attention as those used for traditional monographs and serials. This article describes some of the differences in standing order material, including their shared characteristics with both monographs and serials. It also reviews factors that make some standing orders a good candidate for an approval plan. The article also enumerates some considerations in vendor selection decisions, regardless of which acquisitions method is used. The author concludes that it is definitely time to assess how these materials are acquired and which type of vendor is used and to make decisions that extend our purchasing power. 相似文献