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全站仪中站法测高程的实用性研究 被引量:2
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作者 黄继磊 罗志清 张晓伦 《科学技术与工程》 北大核心 2012年第20期4984-4986,4995,共4页
通过对全站仪中站法测高程的原理进行分析,得出其测高程的可行性。通过对三、四等水准测量限制条件的分析,得出中站法测三、四等水准的限制条件,并设计出相配套的计簿表格及相应的平差方法,便于中站法测高程在实际工作中的应用。
关键词 中站法测高程 计簿表 平差
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全站仪中站法高程测量探讨 被引量:2
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作者 高诚 《中州煤炭》 2010年第6期39-40,共2页
利用传统三角高程测量的原理和方法推导出井下全站仪中站法高差测量的计算公式,应用误差传播定律分析了该方法的测量精度,并与水准测量的精度进行比较,从而得出在一定条件下该方法可代替井下三等水准测量的结论。
关键词 中站法 三角高程 水准测量 精度分析
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全站仪中站法在煤矿测量中的精度分析及应用
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作者 高诚 《矿业科学技术》 2010年第4期41-42,共2页
利用传统三角高程的原理和方法推导出全站仪中站法的计算公式,并利用误差传播定律分析了该方法的精度,并与水准测量的精度进行比较,印证利用中站法在一定条件下完全可以代替三等水准测量的结论。
关键词 中站法 三角高程 水准测量 精度分析
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基于中站测量法对全站仪煤矿测量的应用研究
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作者 杨文龙 时建成 《机械管理开发》 2020年第4期151-152,224,共3页
为了研究全站仪中站法在煤矿测量中的应用可行性,以磁窑沟煤矿为工程背景,基于全站仪中站法,通过分析其原理和方法,利用误差传播定律分析该方法的精度,并与传统的水准测量作比较..研究结果表明:全站仪中站法在倾角不大于25°、测距... 为了研究全站仪中站法在煤矿测量中的应用可行性,以磁窑沟煤矿为工程背景,基于全站仪中站法,通过分析其原理和方法,利用误差传播定律分析该方法的精度,并与传统的水准测量作比较..研究结果表明:全站仪中站法在倾角不大于25°、测距不大于300 m的情况下可代替传统的水准测量在煤矿井下进行高程的测量. 展开更多
关键词 全站仪 中站法 精度分析 优化研究
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From Chooz to the Ling'ao NPP:The Technology Transfer of Pressurized Water Reactor Technology from France to China
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作者 CHEN Yue LI Yunyi 《Chinese Annals of History of Science and Technology》 2024年第1期97-124,共28页
The transfer of pressurized water reactor(PWR)technology from France to China is an important event in the history of Sino-French scientific and technological relations.China has gradually achieved self-reliance in th... The transfer of pressurized water reactor(PWR)technology from France to China is an important event in the history of Sino-French scientific and technological relations.China has gradually achieved self-reliance in the field of PWR technology through the introduction and subsequent absorption of France's 900 MW reactors.Compared with the process of introducing and absorbing similar technology from the United States by France,China's experience has been more complicated.This circumstance reflects the differences in the nuclear power technology systems between the two countries.France's industrial strength and early acquisition of nuclear power technology laid a solid foundation for mastering PWR technology.On the other hand,although China established a weak foundation through the implementation of the"728 Project,"and tried hard to negotiate with France,the substantive content of the technology transfer was very limited.By way of the policy transition from"unhooking of technology and trade"to"integration of technology and trade,"China ultimately accomplished the absorption and innovation of PWR technology through the Ling'ao NPP. 展开更多
关键词 pressurized water reactor(PWR) technology transfer Sino-French relations Chooz NPP Daya Bay NPP Ling'ao NPP
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Adaptive robust beamformer for multi-pair two-way relay networks with imperfect channel state information
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作者 Jin WANG Feng SHU +3 位作者 Ri-qing CHEN Yu-di CUI Yu CHEN Jun LI 《Frontiers of Information Technology & Electronic Engineering》 SCIE EI CSCD 2016年第3期265-280,共16页
In wideband multi-pair two-way relay networks, the performance of beamforming at a relay station(RS) is intimately related to the accuracy of the channel state information(CSI) available. The accuracy of CSI is determ... In wideband multi-pair two-way relay networks, the performance of beamforming at a relay station(RS) is intimately related to the accuracy of the channel state information(CSI) available. The accuracy of CSI is determined by Doppler spread, delay between beamforming and channel estimation, and density of pilot symbols,including transmit power of pilot symbols. The coefficient of the Gaussian-Markov CSI error model is modeled as a function of CSI delay, Doppler spread, and signal-to-noise ratio, and can be estimated in real time. In accordance with the real-time estimated coefficients of the error model, an adaptive robust maximum signal-to-interferenceand-noise ratio(Max-SINR) plus maximum signal-to-leakage-and-noise ratio(Max-SLNR) beamformer at an RS is proposed to track the variation of the CSI error. From simulation results and analysis, it is shown that: compared to existing non-adaptive beamformers, the proposed adaptive beamformer is more robust and performs much better in the sense of bit error rate(BER); with increase in the density of transmit pilot symbols, its BER and sum-rate performances tend to those of the beamformer of Max-SINR plus Max-SLNR with ideal CSI. 展开更多
关键词 Multi-pair two-way relay Adaptive robust beamformer Channel state information (CSI) Maximumsignal-to-interference-and-noise ratio (Max-SINR) Maximum signal-to-leakage-and-noise ratio (Max-SLNR)
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