共查询到20条相似文献,搜索用时 125 毫秒
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生态文明建设为东海近年来的高速发展提供了保障,也为新一轮跨越式发展创造了良好的条件并奠定了扎实的基础。增强了城市的综合竞争力,提升了全民的生活品质,推动了社会事业的协调发展。 相似文献
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船舶电子通信设备是船舶的重要设备,近年来我国的船舶电子通信产品越来越多。主要从产品分类、标准体系、检测规范这几个方面分析现有的船用电子通信产品的检测配套技术需求。 相似文献
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热真空试验是航天器研制过程中非常重要的一项试验,作为满足热真空试验必不可少的工具,好的热真空试验系统可以保证试验件在不失真的情况下试验,使试验受控,而热真空试验系统温度均匀度不好,会造成过试验或欠试验的产生。文中以某型热真空试验设备为例,通过试验研究分析其温度均匀度,可以提高热真空试验的精度。 相似文献
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对自行研制的电子设备太阳辐射试验系统进行了介绍。设备研制中对试验系统的辐照灯阵进行了优化设计,同时根据环境试验要求,介绍了太阳辐射试验设备研制过程中所遇到的辐射光源选择及强度控制、光谱分布修正和光源启动系统等技术难点,并给出了解决途径。该试验系统研制成功,为考核装备的环境适应性和产品可靠性提供了科学的试验手段。 相似文献
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James R. Leech Steven R. Abt Christopher I. Thornton Phil G. Combs 《Journal of the American Water Resources Association》1999,35(4):877-885
ABSTRACT: There is a need to provide flood protection while maintaining stable bed and bank conditions in the riverine system, to stabilize earth embankment dams and spiliways, and to stabilize highway or railway embankments and levee systems. One approach to providing erosion protection and stabilization of channel banks, embankments and spill conveyances is with articulated concrete block systems. Numerous articulated concrete block systems are available for bank stabilization. However, prior to field installations few means are available to evaluate how well these block systems perform. To assist the designer in predicting site specific suitability, a series of hydraulic testing protocols have been developed to analyze block system performance. Two articulated block system testing protocols are presented to indicate how block hydraulic characteristics may be determined and provide performance assurance to both the designer and the owner. 相似文献