排序方式: 共有34条查询结果,搜索用时 15 毫秒
2.
Based on the study of the characteristics of the cloud, firstly the interference mechanism of the capacitance proximity fuze passing through the cloud has been studied. Analysis shows that the medium property of the cloud only, has little effect on the capacitance proximity fuze. Secondly, the adherence interference of the cloud to capacitance proximity fuze has been studied for the first time in this paper. Then finite element analysis (FEA) method has been used to simulate the adherence interference of the cloud. Simulation result shows that the cloud adherence effect interferes the output of the capacitance fuze greatly. At last, experiments have been made for the study of the cloud interference. 相似文献
3.
4.
5.
6.
7.
8.
9.
采用均匀设计法优选球形硝基胍制备工艺,可获得较大堆积密度的球形NQ。用非水溶剂(DMF)法制备球形NQ,在过滤溶液(母液)中加入少量NQ结晶控制颗粒,可使母液多次重复使用,但结晶控制颗粒必须是球形,且加入颗粒的大小和质量分数应限制在一定范围内,关键工艺是控制母液结晶体系状态。通过均匀设计.优选出的工艺条件为:结晶控制颗粒粒径70~100μm,质量分数0.5%,过饱和溶液冷却速度3.5C/min。结果表明,制备的球形NQ最大堆积密度为1.01g/cm^3,且晶体形状规整,表面光滑.颗粒级配后振实密度为1.13g/cm^3。 相似文献
10.
To measure projectile attitude in space flight,based on continuous wave( CW) radar,a new micro-Doppler effect testing technique is developed in this paper. It also establishes radar testing model for attitude of flying projectile and resolve micro-Doppler effect of projectile motion attitude.By distinguishing and geting attitude parameters such as micro-motion period,this technique can intuitively estimate the flight stability of projectile,and the validity of this technique is proved according to flight tests. 相似文献