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长效碳酸氢铵
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《技术与市场》 2000年第1期19-19,共1页
关键词 碳酸氢 氮素利用 长效碳铵 稳定剂 结硬块 生产过程 污染环境 推广应用 肥效期
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花卉盆景的微孔浇灌
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作者 华英 《北京木材工业》 1999年第4期12-12,共1页
关键词 花卉盆景 微孔 居室环境 结硬块 陶冶情操 容易进入 泥土 业余时间 饮料瓶 进行交换
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Design and Study of a High Security ATM System
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作者 范瑞霞 赵则祥 张俊 《Journal of Beijing Institute of Technology》 EI CAS 2002年第1期41-44,共4页
Based on the characteristics of ATM system and the special requirement of financial transaction, an overall design of hardware and software structure of ATM was made. For software structure, the pattern of modules and... Based on the characteristics of ATM system and the special requirement of financial transaction, an overall design of hardware and software structure of ATM was made. For software structure, the pattern of modules and table? drive is adopted to realize the security of financial transaction and the diagnosis of communication fault. A new method, which is based on the application layer, transport layer and network layer, is used for diagnosing communication fault. Supporting both magnetic card and IC card, the system has been put into use in real financial systems, and has brought about both economic and social effects. 展开更多
关键词 ATM IC card SECURITY fault diagnosis
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Design of motion control system of pipeline detection AUV 被引量:1
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作者 JIANG Chun-meng WAN Lei SUN Yu-shan 《Journal of Central South University》 SCIE EI CAS CSCD 2017年第3期637-646,共10页
A great number of pipelines in China are in unsatisfactory condition and faced with problems of corrosion and cracking,but there are very few approaches for underwater pipeline detection.Pipeline detection autonomous ... A great number of pipelines in China are in unsatisfactory condition and faced with problems of corrosion and cracking,but there are very few approaches for underwater pipeline detection.Pipeline detection autonomous underwater vehicle(PDAUV) is hereby designed to solve these problems when working with advanced optical,acoustical and electrical sensors for underwater pipeline detection.PDAUV is a test bed that not only examines the logical rationality of the program,effectiveness of the hardware architecture,accuracy of the software interface protocol as well as the reliability and stability of the control system but also verifies the effectiveness of the control system in tank experiments and sea trials.The motion control system of PDAUV,including both the hardware and software architectures,is introduced in this work.The software module and information flow of the motion control system of PDAUV and a novel neural network-based control(NNC) are also covered.Besides,a real-time identification method based on neural network is used to realize system identification.The tank experiments and sea trials are carried out to verify the feasibility and capability of PDAUV control system to complete underwater pipeline detection task. 展开更多
关键词 pipeline detection autonomous underwater vehicle (PDAUV) novel neural network-based control motion controlsystem embedded system architecture system identification
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碳酸氢铵由短效变长效
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《中学化学教学参考》 1999年第12期34-34,共1页
关键词 长效碳酸氢铵 中国科学院沈阳应用生态研究所 小氮肥厂 氮素利用率 氮肥利用率 高效农业 老厂技术 我国农业发展 化肥品种 结硬块
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