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简介：·学术探讨·直升机操纵范围研究·····,······································,························4·····,··········……张雅铭〔1一l)降低旋翼激振力的动力学优化设计研究综述······································……郭俊贤向锦武张晓谷(l一7)热塑性与热固性复合材料抗坠吸能地板的比较与分析·······························4··············……荚淑萍(l一14)用容量瓶测量气动元件微小漏气量························,···········································……杨振祥(l一23)无人驾驶直升机外形设讨一的一些研究···············一···················································一吕春雷‘I一28)直一9直升机主液压助力器稳定性分析···········································...

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简介：洛斯阿拉莫斯实验室说，科学家已研制出一种介子宇宙射线扫描装置，它可以准确探测到任意车辆或集装箱内的走私核武器及核材料。洛斯阿拉莫斯的官员称，较之X射线扫描仪，该装置拥有巨犬优势，X射线扫描仪会发出大量危险射线，而且无法穿透铅质容器及其他防护层。这种扫描仪的多件测试模型已制造完毕并试验成功，完整的样机也正在制造中。