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中国地质大学科学技术发展院朱棋（博士研究生），文章*，环境学院. Journal of Hydrology (2019), Combined role of leaky and non-Darcian effects on the flow to a pumping well with a non-uniform flux well-face boundary（图）
整井；达西流；无越流；补给；均质；含水层
2021/10/15
2019年，国际著名期刊《Journal of Hydrology》刊发了中国地质大学环境学院文章教授团队的最新研究成果——“Combined role of leaky and non-Darcian effects on the flow to a pumping well with a non-uniform flux well-face boundary”。该文第一作者为环境学院博士研究生...
ENVIRONMENTAL IMPACT ASSESSMENT OF MINING RELATED DEWATERING ACTIVITIES USING INTEGRATED INSAR,OPTICAL REMOTE SENSING AND PUMPING DATA
Interferometric SAR EIA Subsidence Dewatering Mining
2015/12/30
Open pit mining sometimes intercepts highly permeable zones, with resulting high inflows of water into the excavation area. This remains a major problem in the mining industry and requires constant mo...
Pumping speed of cryopump for xenon
vacuum plume large-diameter external cryopump xenon pumping speed test
2015/8/11
The xenon pumping speed testing system of the large-diameter external cryopump was designed to meet the plume test requirements for prototype electric propulsion. The flowmeter method was utilized to ...
Behavioral Variations of Gain and NF Owing to Configurations and Pumping Powers
Double Pass Single Pass Erbium Doped Fiber Configuration Pumping Power
2013/1/30
Six configurations are proposed in this paper to explore the gain and noise figure (NF) variations under the pumping power effect. I propose a new investigation of gain and NF at different EDFA config...
Dynamic Model of Spectral Hole Burning for EDFAs with 980-nm-Pumping
Dynamic Model Spectral Hole Burning EDFA 980-nm-Pumping
2015/5/20
Spectral hole burning (SHB) in the gain spectrum of EDFAs influences the dynamic response of EDFAs and their electronic control. A 3-level-model incorporating SHB has been derived and numerically inve...
Unrepeatered Transmission over 300 km of NZDSF Using 8x112-Gb/s Time-Interleaved RZ-PDM-QPSK with Coherent Detection and Forward Raman Pumping
Unrepeatered Transmission Coherent Detection RZ-PDM-QPSK
2015/5/15
We show that time-interleaved RZ-PDM-QPSK and forward Raman pumping can increase the performance of a 112-Gb/s PDM-QPSK coherent unrepeatered transmission system over 300 km of NZDSF by more than 2 dB...
泵站多机组叶片全调节优化运行分解-动态规划聚合方法（Study of Optimal Operation Method on Multiple Pump Units with Adjustable-blade for Single Pumping Station Based on Decomposition-dynamic Programming Aggregation Method）
泵站 多机组 叶片全调节 优化运行模型
2010/12/29
针对泵站多机组叶片全调节日优化运行数学模型，提出了大系统分解-动态规划聚合求解方法。以泵站日提水耗电费用最小为目标，机组提水量为协调变量，将该模型分解为若干个单机组叶片全调节日优化运行子模型。该子模型以机组叶片安放角为决策变量，机组提水量的离散值为状态变量，采用动态规划方法求解。构造的聚合模型以各机组提水量为决策变量，泵站提水量的离散值为状态变量，同样采用动态规划方法求解。该方法可解决安装不同型号...
低扬程泵装置效率与泵效率关系研究（Study on the Relationship between System and Pump Efficiencies of Low-head Pumping Systems）
装置效率 泵效率 流道效率
2010/12/29
低扬程泵站的泵效率与装置效率之间关系主要取决于流道的损失，在对现有研究两者关系的主要方法进行总结的基础上，根据大量的试验数据对现有的泵效率与流道效率乘积为装置效率的基本假定进行验证，发现基本假定存在矛盾；进而采用CFD方法对采用不同比转数叶轮的不同装置型式进、出水流道水力损失进行预测，分析流道损失的变化规律，提出装置效率可以采用泵效率与流道效率的乘积表述，但前提条件是流道损失必须是有泵时的水力损失...
An Approach to the Design Calculation of Sucker Rod Pumping Systems in Coalbed Methane Wells
sucker rod pump kinematic analysis polished rod load
2011/8/3
The existing design of the pumping systems mainly focuses on the approximate computational formulae and procedures, which are developed based on the analytic approaches of conventional oil/gas fields....
Double Pulse Pumping on All-Optical Sampling Using Electroabsorption Modulator
Nonlinear optical signal processing Semiconductor nonlinear optics including MQW Fiber optics communications
2015/6/10
Double-pulse pumping improves the temporal resolution of cost-effective all-optical sampling using an electroabsorption modulator. A shortened sampling gate width was demonstrated using two double-pul...
First Experimental Evidence of a ?ovel Multimode Pumping Scheme for an Array of Rare-earth Doped Waveguide Amplifiers and Lasers
ovel Multimode Pumping Scheme Rare-earth Doped Waveguide Amplifiers Lasers
2015/6/8
We propose a novel multimode pumping scheme for waveguide amplifier and laser arrays. Light from a broad area laser at 980 nm is coupled into a large passive waveguide and then effectively transferred...
基于同步整流的光伏水泵数字控制器（Digital Controller for PV Pumping Based on Synchronous Rectification）
光伏水泵 无刷直流电动机 同步整流
2009/11/24
根据光伏水泵无刷直流电动机驱动实际需要，提出一种数字控制器解决方案。为降低控制器续流损耗，基于同步整流技术采用MOSFET代替体二极管续流，并可降低控制器温升，提高系统可靠性。研究了改进的无差拍控制策略，采用自适应无轨迹卡尔曼滤波方法(Adaptive UKF)在线辨识、修正系统参数，以改善力矩电流控制效果。仿真和实验结果表明，该方案易于数字实现，参数辨识有效，电流控制精度高，提高了系统运行性能。
Water Pumping System with PLC and Frequency Control
Water Pumping System PLC Frequency Control
2010/1/15
Water Pumping System with PLC and Frequency Control.
基于不可行度的机压树状管网退火遗传算法优化（Optimization of Pumping Tree Pipe Network by Using Annealing-genetic Algorithms Based on Infeasible Degree）
树状管网 遗传算法 模拟退火
2009/9/25
规定管网中每一管段最多只能由两种管径的管道组成，提出一种以管网年费用为目标函数，以水泵扬程、管长和标准管径为决策变量的机压树状输水管网优化数学模型。定义种群中个体的不可行度函数，采用基于解的不可行度退火算法处理约束条件。应用模拟退火算法，对解的不可行度进行局部优化，使其逐步逼近可行解。将遗传算法全局优化和模拟退火的良好局部搜索能力有机结合，构造出一种退火遗传算法用于机压树状管网优化设计。仿真结果表...
Improved Supercontinuum Generation by Dispersion Tuning and Dual Wavelength Pumping
Dispersion Dual Wavelength Pumping
2015/7/16
Supercontinuum generation in ultra-long Raman fibre laser cavities is compared for a range of fibre dispersions in the anomalous and normal regimes. For normal dispersion improved performance and effi...