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火箭测试平台多通道脉动压力的同步采集与数据回收 被引量:1
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作者 张成 张奇 +2 位作者 聂飞 罗承刚 刘静 《装备环境工程》 CAS 2021年第3期82-85,共4页
目的实现火箭测试平台多通道脉动压力的同步采集与数据回收。方法在多时钟的采样系统内,采用统一的同步触发信号作为各通道的采样使能,实现40通道脉动压力的同步采集。采用"采存分离"的设计方法将存储电路从采样系统中分离,... 目的实现火箭测试平台多通道脉动压力的同步采集与数据回收。方法在多时钟的采样系统内,采用统一的同步触发信号作为各通道的采样使能,实现40通道脉动压力的同步采集。采用"采存分离"的设计方法将存储电路从采样系统中分离,仅对存储电路进行抗冲击防护,通过火炮试验考核抗冲击性,通过回收存储电路实现数据回收。结果 40通道的采样同步精度被控制在了5个时钟周期内。存储体通过1000 m/s以上的冲击速度考核,数据全部回收。结论多时钟采样系统采用统一的同步触发信号可有效保证采样的同步性。在飞行载体弹舱空间受限的情况下,"采存分离"的方式可以在不增加体积和质量的前提下,极大增强数据记忆体的抗冲击能力,提高数据回收概率。 展开更多
关键词 脉动压力 同步采集 采存分离 数据回收
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Current Situations and Countermeasures of Organic Tobacco Development 被引量:3
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作者 GENG Rui-mei LI Yan-dong +4 位作者 CHEN Xiu-zhai WEN Liang LIU Yong CAO Chang-dai luo cheng-gang 《Asian Agricultural Research》 2011年第10期58-61,66,共5页
Current situations of organic tobacco development at both home and abroad,indicating that organic tobacco is one of the innovation directions for sustainable,healthy,environmental protection and low carbon development... Current situations of organic tobacco development at both home and abroad,indicating that organic tobacco is one of the innovation directions for sustainable,healthy,environmental protection and low carbon development of modern tobacco industry.On the basis of foreign cultivation technical system for organic agriculture,the cultivation technical system for organic tobacco is summed up as follows:first,keep the diversity and continuity of space and time;second,ensure closeness of nutrient cycle;third,improve self-regulatory system and protection ability of crops.Then,the development trend of organic tobacco is analyzed and corresponding measures are put forward:establish production base and assessment system for organic tobacco;establish technical system for production of organic tobacco;establish and perfect evaluation system for management,production and supervision of organic tobacco;strengthen popularization of production and concept of organic tobacco;improve management of organic tobacco purchase,industry commerce handover,and redrying. 展开更多
关键词 Organic tobacco Current situations COUNTERMEASURES China
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