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1.
现在的经济发展中,电力是重要的能源,为我国的工业化生产提供了重要的保障。并且除了现在的工业用电,生活用电也需要大量的电力,从现在的用电情况中可以看出,电力工业在我国拥有重要的地位。在现在的电力生产中,除了电气一次设备外,电气二次设备也是非常重要的,一旦在电力生产中电气二次回路出现故障,那么将会给电力生产带来很大的困难。本文将从现在电力生产中的电气二次回路概述出发,分析常见的故障,提出更好的方法实现电气二次回路的正常工作,以供参考。 相似文献
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伴随着我国经济快速增长而来的是整个社会对电力需求的急剧增加。社会中的大量电力需求,既是我国电力事业发展的压力,又是推动电力事业不断前进的强大动力。目前,我国的电力工业正处于蓬勃发展时期,各种先进设备、先进技术被广泛应用于电力生产、传输、应用过程中。在电力营销工作中,用电稽查是降损节能的一项十分重要的工作。但是,随着用电人数不断增多,这也成了一项很棘手的工作。本篇文章针对用电稽查中的新技术——在线监测技术,进行了详细的讲解。 相似文献
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电力行业的安全生产有其突出的重要性,这是电力在国民经济中所处的地位和作用,以及电力生产本身的客观规律所决定的.因此,安全生产是电力工业永恒的主题.在任何情况下,都要坚持"安全第一,预防为主"的方针. 相似文献
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电力生产运行中,安全生产是第一责任,运行故障对电力运行安全工作造成了极大影响,许多事故的出现都与运行故障之间有着千丝万缕联系,造成重大人员伤亡、设备损坏以及经济损失。电力企业应当强化运行故障的分析以及管理工作,切实提升电力安全运行水平,保障电力行业的良性发展。 相似文献
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改革开放以来,随着我国社会主义市场经济的不断发展和城市化建设进程的不断加快,电力变压器作为电力系统重要的输变电设备之一,是输变电系统运转过程中的关键环节,因此其健康状态和运行状况不仅对整个电力系统运行的安全性与否具有直接影响,同时还与周遭居民的生命安全息息相关,但在当下快速化发展的时代背景下,电力变压器在运转过程中各类故障问题屡见不鲜,给居民经济和电力系统带来重大损失的同时也影响着人们日常学习、生产、生活等方方面面,故而提高变压器运行维护和技术管理水平,减少电力变压器故障的发生,是现阶段电力企业的核心发展方向。鉴于此,本文主要阐述了当下电力变压器的常见故障以及引起故障的原因,并对其检修的过程进行了详细的探讨,以期在确保电力变压器安全正常运行的基础上,为企业的进一步发展奠定良好基础。 相似文献
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目前由于我国的社会经济的不断发展进步,我国的工农业生产用电方面的需求不断增加,此外我国居民的日常生活需求也在持续增加,这就促使我国的电力行业的飞速发展,与此同时,对于电力运输电线路的运行维护的工作要求也增加了,而且也加重电力运输过程中的故障检修的工作量,因此,为了保障电力系统运行的稳定性和安全性就要及时的处理在电力运输过程中出现的故障,以保障电力运输电路线正常运行以及检修故障的有效性。所以要不断地加强对电力输电线路的运行维护和故障的检测。就电力输电线路的运行维护以及其故障检修进行细致的探讨分析,并提出相关的电力输电线路运行维护和故障检修的措施,以便为以后的电力输电线路的运行维护和故障维护检修的发展和进步提供可参考的依据。 相似文献
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随着电力走向市场步伐的逐步加快以及国家电力公司管理体制的改革,我国电力工业管理体制由计划经济向市场经济开始转变.在机构改革过程中各级供电企业均面临着新的挑战.在新的企业改革中将逐步成为具有一定竞争能力的独立市场主体和独立法人主体.企业的工作重点已经由原来的单一安全生产转变以经济效益为中心的全方位的综合发展.为此,需要企业建立规范的现代企业制度,减人增效,提高劳动生产率,提高管理水平,加强信息反馈,提高决策的科学性和准确性,提高企业的综合竞争力.本文就构件技术在电力营销中应用研究的现状做一点有益的尝试. 相似文献
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随着电力工业的快速发展,电力生产的瓶顾制约作用有所缓解,电力作为商品将由卖方市场逐渐转向买方市场,而电力企业原本的垄断性在向市场经济过渡中又明显凸现了它的滞后性和不适应性。而电力工业作为工农业生产的先行官,是盘接为工农业生产服务的原动力,电力生产适应市场经济的快速发展,确立市场意识,积极转变观念,转变经营机制,促进电力营销,不仅是社会经济发生根本变革的需要,更是电力企业在市场经济大潮中自我发展的唯一途径。 相似文献
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Marjorie Armstrong-Stassen Margaret Landstrom Ramona Lumpkin 《The Information Society》1998,14(2):153-164
This study examined how students who had no prior experience with videoconferencing would react to the use of videoconferencing as an instructional medium. Students enrolled in seven different courses completed a questionnaire at the beginning of the semester and again at the end of the semester. Students at the origination and remote sites did not differ in their reactions toward videoconferencing but there was a significant difference for gender. Women reacted less favorably to videoconferencing. Compared to the beginning of the semester, students reported significantly less positive attitudes toward taking a course through videoconferencing at the end of the semester. There were no significant differences in students' attitudes toward videoconferencing across courses at the beginning of the semester but there were significant differences across the courses at the end of the semester. The results suggest the need for better preparation for both students and instructors. 相似文献
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A joint study by Prof. ZHANG Zhibin from the CAS Institute of Zoology his co-workers from Norway US Swiss have indicated that historical outbreaks of migratory locusts in China were associated with cold spells suggesting that China's projected climate warming could decrease the pest's numbers. The study was published in Proceedings of the National Academy of Sciences on September .…… 《中国科学院院刊(英文版)》2008,22(1):6-7
Ajoint study by Prof. ZHANG Zhibin from the CAS Institute of Zoology and his co-workers from Norway, US and Swiss have indicated that historical outbreaks of migratory locusts in China were associated with cold spells, suggesting that China＇s projected climate warming could decrease the pest＇s numbers. The study was published in Proceedings of theNational Academy of Sciences on 17 September, 2007. 相似文献
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Caroline Haythornthwaite 《The Information Society》2001,17(3):211-226
A computer-mediated group is a complex entity whose members exchange many types of information via multiple means of communication in pursuit of goals specific to their environment. Over time, they coordinate technical features of media with locally enacted use to achieve a viable working arrangement. To explore this complex interaction, a case study is presented of the social networks of interactions and media use among members of a class of computer-supported distance learners. Results show how group structures associated with project teams dominated who communicated with whom, about what, and via which media over the term, and how media came to occupy their own communication niches: Webboard for diffuse class-wide communication; Internet Relay Chat more to named others but still for general communication across the class; and e-mail primarily for intrateam communication. Face-to-face interaction, occurring only during a short on-campus session, appears to have had a catalytic effect on social and emotional exchanges. Results suggest the need to structure exchanges to balance class-wide sharing of ideas with subgroup interactions that facilitate project completion, and to provide media that support these two modes of interaction. 相似文献
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Electronic data interchange (EDI) provides means for interorganizational communication, creates network externalities, requires an advanced information technology (IT) infrastructure, and relies on standards. In the diffusion of such innovations, institutional involvement is imperative. Such institutions contain governmental agencies, national and global standardization organizations, local government, and nonprofit private organizations like industry associations. The last type of organizations we call intermediating institutions. They intermediate or coordinate ("inscribe") the activities of a group of would-be adopters. Unfortunately, little is known of how these organizations shape the EDI diffusion trajectory. In this article we examine one specific type of intermediating organizations?industry associations?and how they advanced the EDI diffusion process in the grocery sectors of Hong Kong, Denmark and Finland. We identify six institutional measures, placed into a matrix formed by the mode of involvement (influence vs. regulation) and the type of diffusion force (supply push vs. demand pull), that can be mobilized to further the EDI diffusion. Industry associations were found to be active users of all these measures to varying degrees. Their role was critical especially in knowledge building, knowledge deployment, and standard setting. Furthermore, institutional involvement varied due to policy and cultural contingencies and power dependencies. 相似文献
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A research group led by Prof. ZHAI Qiwei from the Institute for Nutritional Sciences under the CAS Shanghai Institutes for Biological Sciences has discovered that even relatively low doses of resveratrol-a chemical found in the skins of red grapes in red wine-can improve the sensitivity of mice to the hormone insulin according to a report in the October issue of Cell Metabolism.…… 《中国科学院院刊(英文版)》2008,22(1):14-15
Aresearch group led by Prof. ZHAI Qiwei from the Institute for Nutritional Sciences under the CAS Shanghai Institutes for Biological Sciences has discovered that even relatively low doses of resveratrol--a chemical found in the skins of red grapes and in red wine--can improve the sensitivity of mice to the hormone insulin, according to a report in the October,2007 issue of Cell Metabolism. As insulin resistance is often characterized as the most critical factor contributing to the development of Type 2 diabetes, the findings“provide a potential new therapeutic approach for preventing or treating” both conditions, the researchers said. 相似文献
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Puay Tang 《The Information Society》1998,14(1):19-31
The increasing prospects of digital piracy has prompted the perceived need by electronic publishers to adopt technical systems of protection, and governments to reform their copyright laws. This article is a preliminary study of the management of intellectual property by electronic publishers, defined as those involved in the production of online databases, and CD-ROMs. It focuses on three main issues: (1) how electronic publishers view the increasing threat of piracy; (2) the methods of protection employed to protect intellectual property in digital format; and (3) the importance of technological protection of intellectual property in electronic publications. The analysis is based on a sample of 23 UK electronic publishers. The interviews revealed an interesting assortment of protection methods and did not show that technological protection was a preferred way. Instead, the means of protection, in addition to copyright law, comprised niche markets, pricing, trust, bad publicity, and nontechnical and technical means. 相似文献
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Milton Mueller 《The Information Society》2001,17(3):151-163
Long-standing conflict between domain name registrants and trademark holders prompted the Internet Corporation for Assigned Names and Numbers (ICANN) to create a global, mandatory arbitration procedure known as the Uniform Dispute Resolution Policy (UDRP). The UDRP has been used in 2166 cases involving 3938 domain names as of 1 November 2000. The policy gives the initiator of a complaint, generally a trademark holder, the right to choose which ICANN-accredited dispute resolution service provider (RSP) will handle the case. During the preparation of the UDRP,some feared that complainant selection would lead to "forum shopping" that might bias the results. This article performs a statistical assessment of the forum-shopping thesis and finds support for it. There are statistically significant differences in the various RSPs' propensity to take away names from defendants; there are also major differences in the number of cases brought to each RSP. RSPs who take away names have the larger share of cases. The study examines other variables that might explain differences in market share, such as price, the plaintiff's nationality, or the time taken to decide a case. It finds that nationality and time also are correlated with market share. The study concludes that shopping for a favorable outcome is an important factor in the UDRP. 相似文献
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Prof. Raymond C.K. Chen a neuropsychologist with the CAS Institute of Psychology has made novel progress in his studies of schizophrenia. His work has been reported by a recent issue of Behavioural Neurology.…… 《中国科学院院刊(英文版)》2008,22(1):15-15
Prof. Raymond C.K. Chen, a neuropsychologist with the CAS Institute of Psychology, has made novel progress in his studies of schizophrenia. His work has been reported by a recent issue of Behavioural Neurology. 相似文献
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Active biological molecules functional structures can be fabricated into a bio-mimetic system by using molecular assembly method. Such materials can be used for the drug delivery disease diagnosis therapy new nanodevice construction.…… 《中国科学院院刊(英文版)》2008,22(1):22-22
Active biological molecules and functional structures can be fabricated into a bio-mimetic system by using molecular assembly method. Such materials can be used for the drug delivery, disease diagnosis and therapy, and new nanodevice construction. 相似文献
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《中国科学院院刊(英文版)》2014,(3)
<正>In Xishuangbanna,one of China’s most biodiverse regions,landscape has changed dramatically during the past three decades due to the conversion of tropical rainforest to rubber plantations.In steep areas,terraces are often constructed before planting rubber trees,which causes two important changes in the soil:the destabilization of soil in the bench terraces and the increased vulnerability of unvegetated riser faces to erosion.Few studies have documented the nature and intensity of erosion on bench terraces.Prof.LIU Wenjie and his colleagues from the Xishuangbanna Tropical Botanical Garden(XTBG)conducted a study in Menglun County(21°5′39″N,101°15′55″E),Xishuangbanna to evaluate the influence 相似文献