【摘 要】
：
A measurement system has been developed based on high-precision printed probes in printed circuit board (PCB) and steep rising-time probe adapters,which can be
【机 构】
：
State Key Laboratory of Explosion Science and Technology,Teaching and Research Center of Unmanned Ae
【基金项目】
：
the Ministerial Level Advanced Research Foundation
论文部分内容阅读
A measurement system has been developed based on high-precision printed probes in printed circuit board (PCB) and steep rising-time probe adapters,which can be applied to study the expansion uniformity of armature in a helical magnetic flux compression generator (HFCG).The influences of wall thickness and initiation position on the expansion uniformity of armature in HFCG were experimentally investigated.The results show that the armature with thinner wall thickness will easily rupture due to the high pressure of detonation products inside,the armature with larger wall thickness will easily crack due to the tensile stress on the outer surface of the wall,the influence of the end effect on the expansion uniformity can be ignored if the distance between the first group of probe and the initiation point is more than 3 times the armature diameter.
其他文献
在黑龙江省尚志国有林场管理局樟子松枯梢病发病区内 ,分别病情等级和立地条件 ,采用均匀分布、典型整群抽样的样地调查和树干解析的方法 ,明确了各病情等级对高生长、径生长
利用B P神经网络对作物生育动态进行模拟。在对B P神经网络的结构和训练算法加以选择后 ,网络模型具有拟合精度高、收敛速度快和泛化能力强等特点。B P网络可用于作物生育进
文章提出了一种利用多指标群决策解决股票预测问题的思路.利用多指标群决策中的多种排序方法集结出决策人对于方案的偏好;同时,利用得出的方案的偏好,求出决策人对于指标的偏
以天津盐碱荒地农垦过程为例,分析盐碱荒地农垦为旱田后土壤环境中微量元素的变化特征。结果显示,随着垦植年限的增加,土壤表层(0—20cm)中,除Hg有明显的增加外,其他微量元素的含量变化不大;与深层土壤(20—40cm)相比,除Cd、B、Hg等微量元素的含量略高于深层土壤外,其它元素的含量基本一致。表明盐碱荒地农垦为旱田后,Hg、B、Cd是受人类活动干扰最大的元素,农业耕作对土壤的影响相对较少。
陕油 8号是利用 2 1 2 A细胞质雄性不育系与改良恢复系 1 1 0 2杂交选育而成的“三系”杂交种 ,1 998～ 1 999年参加国家黄淮区域试验 ,2年综评居参试品种第 1位 ,平均单产 2 0
碧绿苦瓜的母本是从穗新 1号中选育出来的强雌株系 7 1 10 2 1 10 ;父本是从槟城苦瓜中选出的自交系槟选 3 0 1 1 10。该一代杂种果实长圆锥形 ,长 2 4～ 2 8cm ,横径 6 .3c
低芥酸杂交油菜渝杂 18由西南农业大学采用化学杀雄方法育成 ,品比试验产量 195 0～ 2 715kg/hm2 ;重庆市区域试验平均产量 194 6kg/hm2 ,比对照品种中油 82 1增产 12 .2 1% ;
本研究将坏死梭杆菌毒力菌株FN(AB)94厌氧培养后,裂解制备抗原,与等量福氏完全佐剂混合,制备乳化佐剂疫苗.将疫苗分别接种4头不同年龄的健康成年鹿(每头接种4m1).3头鹿作为对
A new method was provided in this paper to recognize tumor in PET images automatically and reduce the waiting time of patient.Based on the unsupervised clusteri
The optical microscope, scanning electron microscope and universal testing machine are used to investigate the effect of Zn content on the microstructure, mecha