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本文针对国内多数单位在器件筛选过程中老炼试验样品种类杂,批次多,试验过程记录的数据量大的现状,利用虚拟仪器软件编程,通过IBM服务器终端作为上位机与多台老炼电源通信,从而对多批老炼试验进行网络控制和实时监测,并分析老炼过程中采集到的电学参数判断老炼试验的状态,自动采取相应的故障处理措施,实现了紧急中断试验、快速保护试验样品,提供试验异常时的电参数波动数据的功能,具有很强的实用性。 相似文献
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本文通过对典型案例的介绍,分析了混合电路自身缺陷以及内部所用的元器件质量问题,导致混合电路失效的原因与机理。通过分析可以看出,混合集成电路的内部结构设计缺陷与工艺缺陷,以及内部所用元器件的自身缺陷,都有可能造成混合电路失效。另外,本文在分析混合电路失效原因与机理基础上,提出了改进设计与工艺,以及加强来料控制措施。 相似文献
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FPGA是近年来发展最快的超大规模集成电路,本文采用国家军用标准GJB/Z 299C-2006《电子设备可靠性预计手册》对FPGA器件进行可靠性预计。 相似文献
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自愈式交流电容器防止“放炮”的方法 总被引:1,自引:0,他引:1
自愈式交流电容器在使用出现放炮的质量问题。分析其原因是由于引出端喷金层的缺陷。研究其检测和改善喷金层缺陷的方法,从而推动改进喷金工艺和选用合适的喷金材料。为此提出采用脉冲老炼做为防止交流电容器放炮的方法。而且经过实践证明有明显的效果。建议在生产中对大电容值的电容器芯子应经过大电流脉冲老炼,然后优选装配为成品出厂,则将大大提高交流电容器使用的可靠性。 相似文献
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OHS风险控制方法在烟气排放控制工程中的应用 总被引:1,自引:0,他引:1
介绍了烟气排放控制工程中OHS风险控制的方法,并以香港青山“B”电厂4X680MW机组排放控制工程(CPBEC)为例,阐述了目前国内外环保项目在OHS风险管理方面的差距和改进措施。 相似文献
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安全高效、资源节约、环境友好型的生态农业生产技术,已成为国际农业领域研究和关注的热点;发展高效生态(有机)农业,以新的强度和效能为长三角和我国现代化农业发展作贡献,是上海社会主义新农村建设的重大战略,是上海现代农业发展的必由之路。荷兰生态(有机)农业发展提供了以下成功经验:以生态学原理指导农业生产,实现生产生态共荣;在农产品生产中应用HACCP理论,加强农业生产的过程控制和质量管理;通过制定良好农业技术规范(Eurep-GAP),保障农业的可持续发展,保护生态环境。上海发展高效生态(有机)农业的对策建议:加强政策扶持,深化有机农业理论和技术研究,建立和规范与国际接轨的认证体系,以生态学的原理和原则指导农业生产和技术的发展。 相似文献
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如何有效去除水中内分泌干扰物、医药活性化合物等有机微污染物的研究逐渐增加,其中,纳滤膜由于其较高的去除率得到了广泛关注。但由于纳滤膜去除这些物质的分离机理较为复杂,有时并不明确,给实验带来较大困难。文章总结了纳滤膜去除水中内分泌干扰物/医药活性化合物的典型应用及其三种分离机理——筛分作用、电荷作用、吸附作用,并对去除过程中所产生的问题和解决方案加以总结。为今后纳滤膜去除内分泌干扰物/医药活性化合物的研究提供参考依据。 相似文献
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介绍了栖息地模拟方法原理及步骤,以姜射坝水电站减水段为例,应用栖息地模拟模型PHABSIM计算了重口裂腹鱼繁殖期适宜生境需水量。结果表明,该河段内重口裂腹鱼繁殖期适宜生态流量为40.6m3/s,其与水文学法的结果对比表明,该流量可以满足维持水生生物良好的生存条件的要求。指出当工程河段涉及珍稀鱼类关键生境时,采用栖息地模拟法确定受影响河段的生态需水量,可以更好地保护珍稀鱼类关键生境。研究结果可为已建电站减水河段生态修复工作提供依据,为拟建电站水生生态环境影响评价工作提供借鉴。 相似文献
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This article brings to light one aspect of alternative agri-food practices by exploring the values and meanings domestic food producers associate with their actions, thereby making a small contribution to increasing understanding of the act of urban backyard food production. While Australian backyards have long been productive spaces, there has been little examination of this phenomenon in the Australian context. Limited quantitative data give some insight into the extent of domestic production, and while there is an increasing interest in certain aspects of the local food system, including community gardens and farmers markets, there is a dearth of literature that explores the contemporary act of domestic production. This work seeks to situate the act of domestic production within the broader movement calling for change within the global food system, particularly that being articulated by the food sovereignty movement. Drawing on Gibson–Graham's diverse economies framework, and through interviews with eight domestic food producers in one Australian city, this work finds that the act of growing food at home offers space for hope – where small acts can be seen as part of the broader food sovereignty movement seeking to remake our food system. 相似文献
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Xinyou Lin Guangji Zhang Shenshen Wei Yanli Yin 《International Journal of Green Energy》2020,17(8):488-500
ABSTRACT The drive range of electric vehicle (EV) is one of the major limitations that impedes its universalism. A great deal of research has been devoted to drive range improvement of EV, an accurate and efficiency energy consumption estimation plays a crucial role in these researches. However, the majority of EV’s energy consumption estimation models are based on single motor EV, these models are not suitable for dual-motor EVs, which are composed of more complex transmission mechanisms and multiple operating modes. Thus, an energy consumption estimation model for dual-motor EV is proposed to estimate battery power. This article focuses on studying the operating modes and system efficiency in each operating mode. The limitation of working area of each mode ensures the vehicle dynamic performance, then PSO algorithm is adopted to optimize the torque (speed) distribution between two motors to improve the system efficiency in the coupled driving mode. Finally, the energy consumption estimation model is established by multiple linear regression (MLR). The result shows that the proposed model has a high precision in energy consumption estimation of dual-motor EV. 相似文献
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Suzuki T 《Journal of environmental quality》2001,30(2):291-302
Development of hypoxia in Japan has been confirmed in the inner part of almost every major bay of Japan on the Pacific Coast from Tokyo southward. This paper presents multiple aspects (present condition, hydraulic mechanism, effect upon fisheries, historical progress and nutrient budget between sediment and water) using Mikawa Bay, where Japan's most serious hypoxia occurs, as an example. Although hypoxia basically results from the increase of nutrient load input from domestic and livestock sources, the intense reclamation of shallows (including tidal flats) and the large reduction in river flow due to farmland irrigation drastically accelerated dissolved oxygen deficiency. Oxygen-deficient waters in Mikawa Bay are large enough to strip the water purification capacity of the remaining shallows. Unfortunately, the shallows have turned from a purifier to a source of nutrient load. These conditions are more or less common in all bays where the dissolved oxygen-deficient waters have been reported. To break this cycle, dissolved oxygen deficiency must be contained to the extent that the purification capacity of the shallows can be restored to an efficient level. For this purpose, the first thing to do is to restore tidal flats over an extensive area and to recover sufficient water flow, which may be a more urgent imperative than reducing the nutrient load input. 相似文献