共查询到20条相似文献,搜索用时 593 毫秒
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非电网路发生拒爆的主要原因及预防措施 总被引:1,自引:1,他引:0
非电网路发生拒爆的主要原因及预防措施阎玉山(广东爆破工程公司广东,510150)非电起爆系统具有与电雷管起爆时同样准确可靠的起爆时差,在杂散电流、磁电场环境和雷雨天气误爆的可能性大大减少。非电网路在布设、防护以及起爆时都比电网路简便。所以,非电起爆近... 相似文献
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以可靠性理论为基础,从理论上分析了塑料导爆管起爆系统的可靠性、系统地阐述了导爆索—导爆管雷管起爆系统的设计和施工方法,并介绍了该起爆系统在冷却塔爆破时的实际应用情况. 相似文献
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本发明介绍了一种低能起爆系统延时起爆装置的壳体,即一个带地面连接器的非电低能起爆系统,地面连接器通过低能雷管至少在一根传递管里准时低噪音地激发信号非定向传递。 相似文献
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介绍激光起爆系统的主要构成及研究进展,针对激光起爆系统检测的难点,提出了一种简单、可行的检测方法。该文重点进行了激光起爆系统的外置式检测技术研究,包括激光起爆器的光路设计、检测光纤设计和耦合结构设计,并通过试验验证,解决了激光起爆器光路定量反射的问题,可为武器、航空航天等高可靠系统提供一定借鉴。 相似文献
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S. A. Gaikwad E. P. Samuel D. S. Patil D. K. Gautam 《Bulletin of Materials Science》2007,30(3):255-261
Temperature dependent analysis to achieve better performance by reducing threshold current requirements and field intensity
has been carried out for GaN/AlGaN heterostructure lasers. The mirror loss in the GaN cavity has been obtained as a function
of temperature and cavity length. The quantum efficiency has been deduced for different values of cavity length. Dependence
of recombination rate on band gap and temperature has been investigated. Threshold current density has been deduced for GaN
lasers and effect of temperature on it has been investigated. The near field intensity analysis has been carried out at different
temperatures for 10% aluminum mole fraction in GaN/AlGaN heterostructure lasers. Furthermore, the effective index and FWHM
of near field has been investigated as a function of temperature. It has been deduced from our analysis that temperature has
a dominant effect on the threshold conditions and near field intensity in the wide band gap GaN based lasers. 相似文献
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聚醚醚酮复合材料的摩擦学研究 总被引:1,自引:0,他引:1
采用模压方法制备了多元PEEK耐磨汽车材料。用环-块磨损实验机对复合材料进行了磨损试验,用SEM方法对复合材料的磨损表面进行了观察和分析,并利用DSC、FT-IR和SEM分析方法对复合材料的磨屑进行了研究,在上述基础上进行了复合材料的磨损机理探讨。结果表明,与PEEK相比,PEEK复合材料具有优良的摩擦学性能;PEEK复合材料磨屑的熔点比相应模压材料有所降低,且磨屑的熔限比相应的模压材料有所加宽;随着Ekonol含量的增加,复合材料的磨损机理发生了由粘着磨损为主向疲劳磨损为主的转变。 相似文献
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针对设计研制的512×512 CMOS APS图像传感器,采用聚焦脉冲激光束研究了其空间单粒子效应特性。试验结果表明,CMOS APS器件图像传感器存在单粒子翻转(SEU)和单粒子锁定(SEL)现象。验证了CMOS APS图像传感器抗单粒子锁定设计的有效性。当对图像传感器移位寄存器区进行照射时,同时发生单粒子翻转和单粒子锁定,器件其它区域也有类似现象。分析了器件单粒子效应的敏感性,获得了器件发生单粒子翻转和锁定的脉冲激光能量阈值及器件锁定电流大小。 相似文献
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MMA/EMA/EA胶乳型互穿网络聚合物阻尼特性研究 总被引:2,自引:1,他引:1
用乳液聚合的方法制备了MMA/EMA/EA的LIPN ,对其阻尼特性进行了研究 ,并研究了增塑剂和填料对其阻尼性能的影响。结果发现 ,此LIPN具有良好的阻尼特性 ,增塑剂的加入对其阻尼特性影响很小。而不同的填料对其阻尼特性的影响不同。其中具有球状立体结构的富勒烯的加入会使其阻尼性能得到大幅度提高 相似文献
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目的 为解决手动灌装条形袋装颗粒干燥剂存在的劳动强度高、生产效率低、计量不均匀等生产难题.方法 结合袋装颗粒式干燥剂罐装的要求及特点,优选框架式结构,设计自动上料、自动称量、自动灌装装置的机械结构.结果 经结构设计、电气控制设计对自动实现颗粒干燥样机进行了搭建与调试,使其具备自动上料、自动称量、自动灌装等功能.实验结果显示全自动智能干燥灌装机与传统罐装相比,生产效率提升了4倍,成本降低了约2/3,罐装计量最大偏差值约为0.5 g.结论 通过企业实践生产验证,不仅大幅减少了操作人员的劳动强度,而且有效地提升了条形袋干燥剂的生产效率和产品加工品质,降低了企业的生产成本. 相似文献
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In Part I of the paper, the Dissolution-Precipitation Mechanism explaining the mechanical behaviour of reacting concrete has been presented and a theory of isotropic linear elastic reacting solids has been proposed. In this Part II of the paper, the above micromechanical mechanism and theory have been discussed. The possible contribution made to the theoretical mechanics of time-dependent materials has been critically examined. The proposed theory has been applied to evaluate the mechanical effects like creep, recovery and relaxation of stressed concrete due to various types of ongoing common chemical reactions. The importance of including stress as a parameter in the investigations on the durability of concrete has been brought out. Finally, the durability problem has been recast as a chemico-mechanical problem. 相似文献