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排序方式: 共有893条查询结果,搜索用时 31 毫秒
851.
近年来在居民生活中出现新的噪声污染,固定设备通过结构传播影响环境。通过对固定设备产生的低频噪声对居民的影响,论述了低频噪声传播方式、特点、对人体健康的危害,提醒有关职能部门应高度重视,采取有效的防护措施,确保居民生活在良好的声环境中。 相似文献
852.
Krzysztof Baszczyński Zygmunt Zrobek 《International journal of occupational safety and ergonomics》2013,19(3):313-331
Retractable type fall arresters are designed to protect against falls from a height of people who need freedom of vertical movement. The practice of fall protection shows that the devices are also used to protect people who work on flat roofs. This application creates quite different operating conditions for the devices. In some situations those conditions can be dangerous for users. The article presents a theoretical analysis of phenomena occurring during a fall arrest with retractable type fall arresters arranged horizontally. The analysis was verified with laboratory tests. The article presents a proposal for the construction of a test stand and a test method for estimating retractable type fall arresters intended for horizontal use. 相似文献
853.
Krzysztof Baszczyński 《International journal of occupational safety and ergonomics》2013,19(2):191-202
Retractable type fall arresters are very effective personal equipment protecting against falls from a height. These devices are used under different atmospheric conditions and in the presence of various types of industrial pollution. For this reason appropriate locking after conditioning simulating extreme conditions of a worksite is one of the essential characteristics of retractable type fall arresters. This article presents the requirements for locking of the devices. A previously used locking test method and its disadvantages are discussed. The article suggests an improved test method and test equipment. Measurement of the test mass acceleration is the most important improvement introduced into the test method. The article shows laboratory tests used to verify the method, which turned out to be a valuable source of information concerning the performance of retractable type fall arresters. 相似文献
854.
机载设备振动条件确定方法的研究 总被引:1,自引:0,他引:1
本文以机载显控台上的显示器为例,结合GJB 150A和GJB 4239的指导,介绍了在设计阶段和生产阶段上分别通过配重和设备的振动试验测量设备安装位置的响应,分析数据并确定机载设备振动试验条件的方法。 相似文献
855.
《International Journal of Sustainable Engineering》2013,6(4):261-277
Technological innovation and shorter product life cycles of electrical and electronic equipment coupled with their rapidly growing applications have resulted in the generation of an enormous amount of waste from electrical and electronic equipment (WEEE). To address the potential environmental problems that could stem from improper end‐of‐life management of WEEE, many countries have drafted national legislation to improve the reuse, remanufacture and material recycling from WEEE, and to reduce the amount of such waste going to landfills. With the introduction of such legislation comes an increased need for the recovery operators to evaluate the recycling costs and environmental benefits of reclaimed products and materials in order to select the most appropriate end‐of‐life options for individual products in WEEE. This paper presents a systematic methodology for ecological and economical assessment to provide a holistic understanding of the impacts associated with different end‐of‐life options for such waste. This assessment, in addition to providing decision‐support for the selection of the best possible end‐of‐life option for a particular product in WEEE, could also generate vital information to support the design and material selection processes during the initial product development activities. The assertion made is that the detailed considerations of the ecological and economical impacts associated with different end‐of‐life options will significantly improve the recovery and recycling of WEEE. 相似文献
856.
857.
基于集对论和主客观综合赋权法的装备保障能力评估研究 总被引:2,自引:2,他引:0
目的提出一种基于集对论和主客观赋权法的装备保障能力评估方法。方法针对装备保障能力评估中存在的诸多不确定问题,构建装备保障能力评估指标体系,基于集对论思想建立装备保障能力集对评估模型。结果通过构造一个双目标决策问题,进行主客观综合赋权确定指标权重,使得评估指标权重向量同时反映了主观程度和客观程度。结论该方法通过联系度量化了评估指标的确定程度,提高了评估结果的可信性,对解决装备保障能力评估中不确定性问题具有很强的指导作用。 相似文献
858.
859.
Sustainability in electrical and electronic equipment closed-loop supply chains: A System Dynamics approach 总被引:3,自引:0,他引:3
In this paper we examine the impact of ecological motivation and technological innovations on the long-term behavior of a closed-loop supply chain with recycling activities. Ecological motivation manifests through legislation and green image factor, whereas technological innovations manifest through design for environment. We adopt System Dynamics methodology applied to many environmental systems seeking long-term gains. The developed model is implemented to a real-world supply chain of electrical equipment in Greece. Numerical analysis illustrates the factors concerned, like the delay of the legislation enforcement, to achieve a sustainable future through non-renewable resources and landfill preservation. 相似文献
860.
介绍了日本理光公司生产的办公设备废塑料的原料再生利用,及其在中国跨境循环利用的背景程和流程,指出将国内处理完结型局部再生利用系统和国际循环完结型全面再生利用系统融合驱动是促进资源环境可持续性发展的有效途径。 相似文献