共查询到19条相似文献,搜索用时 62 毫秒
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根据空气动力学原理,利用流态化卸粮系统取代清仓机械,实现浅圆仓卸粮机械化作业,同时也可用于浅圆仓粮食的通风降温。 相似文献
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斗轮堆取料机斗轮轴轴承密封圈工作环境恶劣,腐蚀性粉尘颗粒积聚严重,导致密封圈过早磨损失效,进而导致轴承磨损报废。对此,设计新型密封装置,减少甚至消除粉尘的入侵,保证轴承正常工作。在改进后对密封装置进行了验证,实践证明,该装置能有效解决油封和轴承的防尘、防腐蚀等问题,提升了油封和轴承的使用寿命,降低维保成本。 相似文献
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通过对某国家粮食储备库中三座大直径浅圆仓进行现场实仓试验,获得了在粮食重量作用下仓壁所受侧压力的数值,并与目前常用的几种理论方法计算结果进行了比较分析,得出一些结论,为浅圆仓设计提供参考. 相似文献
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船舶艉轴管密封装置的密封性好坏,将直接影响到船舶的航行安全和海洋环保,历来为世界各国航运界、造船界及业内有关专家和人士所关注。目前,我国沿海以及远洋运 相似文献
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中国(上海)自由贸易试验区的建立,是党中央、国务院在新形势下推进改革开放的重大举措,目的在于加快政府职能转变、积极探索管理模式创新。这对于正处在改革进程中的中国海关监管制度提出了巨大的挑战,但同时也赋予了海关更多发展机遇和责任。本文以进口医疗器械为切入点,通过对中国(上海)自由贸易试验区进口医疗器械产业深入研究,整合区域监管服务的创新需求,探索一套结合进口医疗器械经营企业的信用情况和其进口产品的风险特征的风险式分类管理海关监管新模式,在加强质量宏观管理上先行先试,推进质量诚信体系建设,在有效把关的同时更好地服务于贸易转型,使自贸试验区成为既放得开又管得好的质量诚信试验区与示范区。 相似文献
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A study on multiple drowning syndromes 总被引:1,自引:0,他引:1
Non-intentional drowning incidents remain a leading cause of mortality in Turkey as well as all over the world. A following related secondary syndrome is composed of those who drown during altruistic attempts to rescue a drowning person. Such 'rescuers' who attempt to rescue a drowning person, may themselves drown, resulting in a tragic multiple death. This study covers the year 2009, and necessary data was found by using internet search engines to identify cases in which a potential rescue attempt resulted with the rescuer's fatal drowning. Thirty-one 'rescuers' and 20 primary drowning victims (PDV) drowned in 28 incidents in which 80% of drowned primary victims (DPV) were children, and 48.4% of the 'rescuers' were children. In 48.4% of the 'rescuers' succeeded in rescuing the PDV's life. Out of them, 38.7% of the 'rescuers' and PDVs were friends/colleagues. The aim of this study is to define and examine multiple drowning syndromes (MDSs) and to suggest preventative measures. An increased awareness of such risks as promotion of swimming and rescue skills could help reducing the MDSs. 相似文献
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介绍了一种L频段双通道非接触式旋转关节的原理.该旋转关节采用新颖的外通道结构方式和多点馈电技术,解决了外通道的旋转抖动问题.测试结果表明,该旋转关节不仅损耗低、驻波比小,而且使用寿命长、可靠性高. 相似文献
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The emergence of new economic centers is changing the competitive scenario. The diffusion of power across an increasingly broad range of countries has opened a window of opportunity for firms from China that want to compete globally. These firms understand their options in exploiting economic geography, and they frequently use cross‐border mergers and acquisitions (M&As) to penetrate developed countries. The United States and Europe are becoming natural destinations for such investments because of their huge markets and leading‐edge technologies. This article provides a “framing device” for firms’ strategies in a multipolar world. © 2015 Wiley Periodicals, Inc. 相似文献
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