4000
4000的相关文献在1998年到2019年内共计378篇,主要集中在自动化技术、计算机技术、工业经济、农业经济
等领域,其中期刊论文378篇、专利文献2篇;相关期刊275种,包括致富天地、农民科技培训、百科知识等;
4000的相关文献由284位作者贡献,包括饶兴鹤、何中科、刘秀芹等。
4000
-研究学者
- 饶兴鹤
- 何中科
- 刘秀芹
- 张佰恒
- 张景焘
- 张鸿俊
- 徐绍才
- 方家平
- 朱赫
- 羽中
- 蔡仁林
- 薛志成
- 陈健翔
- 高志峰
- Bruce Cassel
- Fusako Kawai
- Jim Harrison
- Kevin Menard
- Masji Watanabe
- Roberta Prandi【美】
- 丁伟平
- 中联钢铁网
- 临风
- 亮亮
- 付凝
- 付剑云
- 代志富
- 任学平
- 何国庆
- 余先生
- 余清
- 侯成鹏
- 侯晓伟
- 俞岫
- 倪丹
- 倪天民
- 关妍
- 冯爱敏
- 凌继忠
- 刘万平
- 刘义扬
- 刘伟
- 刘伟茹
- 刘传科
- 刘华
- 刘学东
- 刘岩
- 刘志宏
- 刘敏
- 刘昆玉
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Masji Watanabe;
Fusako Kawai
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摘要:
Microbial depolymerization processes of xenobiotic polymers are discussed. A mathematical model is formulated and inverse problems for a time factor and a molecular factor of a degradation rate are described. Experimental outcomes are introduced in inverse analyses. Once the time factor and the molecular factor are obtained, the microbial depolymerization process is simu-lated. Numerical techniques are illustrated and numerical results are presented.
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曹叶飞;
朱晓东;
谭燕
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摘要:
中压交流气体绝缘金属封闭开关设备(C-GIS)通常由于发热元器件全部密封在狭小的充气隔室空间内,热量很难有效排出。特别是对于仅充有微正压气体的大电流交流气体绝缘金属封闭开关设备,由于充气隔室内气体分子密度接近大气压条件下的分子密度,当开关柜额定电流大于等于3 150 A时,柜内发热尤其严重,严重的发热缩短了开关设备的运行寿命。文中通过对气体绝缘金属封闭开关设备发热与散热机理的分析和试验结果的对比,提出了额定电流4 000 A的气体绝缘金属封闭开关设备降低温升的一种设计方案。实验结果表明该方案可满足标准要求。
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邬春明;
刘海维
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摘要:
为了安全、有效、便捷地采集隔离病房中的环境参数及病员体征数据,设计了基于短距离无线技术的隔离病房监控系统.系统由病房内采集节点、中继节点、监护室内监控节点3部分组成,采用AT89S52单片机作为微处理器,控制传感器进行数据实时采集并由LCD12864显示数据,通过短距离无线通信模块PTR4000将采集到的数据传到监护室.系统具有使用方便、可靠性高等特点,适合隔离病房等对外封闭的场合使用.%In order to collect the environmental parameters in the isolation ward and the patienfs signs data safely, effectively, and conveniently, an isolation ward monitoring system based on the short- range wireless technology is designed. The system consists of three parts, the wards collecting node, relay node, and the monitoring node in care unit; as a microprocessor, AT89S52 MCU controls sensors for real-time data acquisition;the data will be displayed by LCD12864, and then be spread to the intensive care unit through the short-range wireless communication module PTR 4000. The system is easy to use, and has high reliability, which is suitable for use in the occasions closed to the outside, such as isolation ward.
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赵小丰
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摘要:
According to the features of long distance underground oil pipeline, this paper analyzes the detection principles and methods using the combined application of PCM + and RD 4000 detectors, solves the problems of accurate positioning, depth surveying and signal interference, in order to reach an effective procedure of detecting underground oil pipeline.%根据长输管道的特点,详细分析了PCM+和RD4000探测仪配合使用进行探测的方法原理,解决了精确定位、定深和信号干扰问题,总结出一套行之有效的地下输油管道的探测流程。
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