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下泄水温公式 1

优化 1

供水泵站 1

叠梁门 1

数值拟合 1

模型试验 1

氢能源汽车；运输走廊；加氢站；SWOT分析 1

水电站进水口 1

温度成层型水库 1

省电类型；状态转变损失；IEEE 802.16e/m；服务质量 1

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A review on the electric vehicle routing problems: Variants and algorithms

Hu QIN , Xinxin SU, Teng REN, Zhixing LUO

《工程管理前沿（英文）》 2021年 第8卷 第3期   页码 370-389 doi: 10.1007/s42524-021-0157-1

摘要： Over the past decade, electric vehicles (EVs) have been considered in a growing number of models and methods for vehicle routing problems (VRPs). This study presents a comprehensive survey of EV routing problems and their many variants. We only consider the problems in which each vehicle may visit multiple vertices and be recharged during the trip. The related literature can be roughly divided into nine classes: Electric traveling salesman problem, green VRP, electric VRP, mixed electric VRP, electric location routing problem, hybrid electric VRP, electric dial-a-ride problem, electric two-echelon VRP, and electric pickup and delivery problem. For each of these nine classes, we focus on reviewing the settings of problem variants and the algorithms used to obtain their solutions.

关键词： electric vehicles     routing     recharging stations     exact algorithms     metaheuristics    

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Power sources and electrical recharging strategies for implantable medical devices

WEI Xiaojuan, LIU Jing

《能源前沿（英文）》 2008年 第2卷 第1期   页码 1-13 doi: 10.1007/s11708-008-0016-3

摘要： Implantable medical devices (IMDs) are critically requested for the survival of patients subject to certain serious diseases such as bradycardia, fibrillation, diabetes, and disability, etc. Appropriate working of an active implantable medical device (IMD) heavily relies on the continuous supply of electricity. In this sense, long-term powering and recharging of an IMD via a highly safe, efficient and convenient way is, therefore, extremely important in clinics. Several conventional batteries, such as lithium cell, nuclear cell and bio-fuel cell, etc., have been developed to power IMDs. Meanwhile, the recharge of IMD from outside of the human body is also under investigation. In this paper, some of the most typical IMD batteries are reviewed. Their advantages and disadvantages are compared. In addition, several emerging innovations to recharge or directly drive the implanted batteries, including electromagnetic energy transmission, piezoelectric power generation, thermoelectric devices, ultrasonic power motors, radio frequency recharging and optical recharging methods, etc., are also discussed. Some fundamental and practical issues thus involved are summarized, and future prospects in this area are made.

关键词： generation     bio-fuel     ultrasonic     piezoelectric     conventional    

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Impact of renewable energies on the operation and economic situation of coal fired power stations: Actualsituation of coal fired power stations in Germany

Hans-Joachim KRAUTZ, Alexander LISK, Joachim POSSELT, Christian KATZER

《能源前沿（英文）》 2017年 第11卷 第2期   页码 119-125 doi: 10.1007/s11708-017-0468-4

摘要： Due to the fluctuating character of the renewable energy sources the demand of conventional power plants for flexibility is increasing. In the recent years, in Germany there has been a fast rise of production capacity of renewable energies, especially from wind turbines, photovoltaic installations, and biomass plants. The installed nominal power of wind turbines is actually (December 2016) 42 GW and of photovoltaic installations 40?GW. The renewable electric energy production in Germany is about 190?TWh/a, which represents a share of 33% of the yearly demand. The increased need for flexibility affects both the power gradients as well as the minimum load of conventional power plants. Due to this flexibility behaviour, conventional power plants are faced with problems concerning the durability of power plant components, corrosion, more maintenance effort and consequently the overall life expectancy. Another consequence of the increasing share of renewable energies is the decreasing full load operating hours, especially of coal fired and gas power plants. Along with decreasing revenues from the energy exchange market, coal fired power plants are faced with new economically challenges.

关键词： flexible load operation     minimal load     power gradients     power plant maintenance     corrosion     life expectancy    

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Optimal precoding for full-duplex base stations under strongly correlated self-interference channels Article

Jun WANG, Xiao-jie WEN, Chuan HUANG, Chao-jin QING

《信息与电子工程前沿（英文）》 2017年 第18卷 第6期   页码 808-816 doi: 10.1631/FITEE.1700022

摘要： 考虑了包含1个全双工多天线基站、2个半双工单天线移动用户的全双工蜂窝系统，研究了其全双工多天线基站的最优预编码方案。由于全双工多天线基站在同一频段上同时收发数据，其接收来自远端用户的期望信号将会受到来自本地发射天线大功率自干扰信号的严重影响。由于现有自干扰消除技术不能将自干扰信号完全抵消，考虑存在残余自干扰信号的场景，构造了上行传输速率受限的下行传输速率最大化问题，以刻画上述全双工蜂窝系统的可达速率区域。然而，上述问题不是凸优化问题。鉴于此，考虑强相关自干扰信道场景，利用自干扰信道矩阵秩为1的特点，将上述非凸优化问题变换为凸优化问题，并利用凸优化工具对其求解，得到全双工多天线基站的最优预编码方案。最后，通过数值仿真验证了该方案的有效性。

关键词： 线性预编码；全双工；可达速率区域；强相关自干扰信道    

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Optimal locations of monitoring stations in water distribution systems under multiple demand patterns

Shuming LIU, Wenjun LIU, Jinduan CHEN, Qi WANG

《环境科学与工程前沿（英文）》 2012年 第6卷 第2期   页码 204-212 doi: 10.1007/s11783-011-0364-9

摘要： A flaw of demand coverage method in solving optimal monitoring stations problem under multiple demand patterns was identified in this paper. In the demand coverage method, the demand coverage of each set of monitoring stations is calculated by accumulating their demand coverage under each demand pattern, and the impact of temporal distribution between different time periods or demand patterns is ignored. This could lead to miscalculation of the optimal locations of the monitoring stations. To overcome this flaw, this paper presents a Demand Coverage Index (DCI) based method. The optimization considers extended period unsteady hydraulics due to the change of nodal demands with time. The method is cast in a genetic algorithm framework for integration with Environmental Protection Agency Net (EPANET) and is demonstrated through example applications. Results show that the set of optimal locations of monitoring stations obtained using the DCI method can represent the water quality of water distribution systems under multiple demand patterns better than the one obtained using previous methods.

关键词： demand coverage     monitoring     optimization     water distribution network     water quality    

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Effect of strata restraint on seismic performance of prefabricated sidewall joints in fabricated subway stations

《结构与土木工程前沿（英文）》 2023年 第17卷 第5期   页码 763-779 doi: 10.1007/s11709-023-0917-6

摘要： A disadvantage of the conventional quasi-static test method is that it does not consider the soil restraint effect. A new method to test the seismic performance of prefabricated specimens for underground assembled structures is proposed, which can realistically reflect the strata restraint effect on the underground structure. Laboratory work combined with finite element (FE) analysis is performed in this study. Three full-scale sidewall specimens with different joint forms are designed and fabricated. Indices related to the seismic performance and damage modes are analyzed comprehensively to reveal the mechanism of the strata restraint effect on the prefabricated sidewall components. Test results show that the strata restraint effect effectively improves the energy dissipation capacity, load-bearing capacity, and the recoverability of the internal deformation of the precast sidewall components. However, the strata restraint effect reduces the ductility of the precast sidewall components and aggravates the shear and bending deformations in the core region of the connection joints. Additionally, the strata restraint effect significantly affects the seismic performance and damage mode of the prefabricated sidewall components. An FE model that can be used to conduct a seismic performance study of prefabricated specimens for underground assembled structures is proposed, and its feasibility is verified via comparison with test data.

关键词： underground structures     precast sidewall specimen     seismic test method     bearing capacity     energy dissipation capacity     plastic deformation    

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淮河生态经济带氢能运输走廊发展SWOT分析

张亮亮,刘 勇,周凌云

《中国工程科学》 2015年 第17卷 第3期   页码 96-99

摘要：

针对汽车等载运工具消耗石油资源迅速增长而石油资源不足问题，用氢能做汽车等载运工具的燃料，是解决载运工具燃料问题的重要举措之一。国内已在江苏沿海建成非并网风电制氢示范工程，并规划建设沿淮千里淮河氢能运输走廊。本文通过SWOT（strengths,weaknesses，opportunities，threats）分析表明淮河生态经济带氢能运输走廊发展优势与劣势并存，机遇与威胁同在，并提出了淮河生态经济带氢能运输走廊发展目标。最后，本文提出了淮河生态经济带氢能运输走廊发展的对策与建议。

关键词： 氢能源汽车；运输走廊；加氢站；SWOT分析    

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用遗传算法求解供水泵站的效率优化问题

廖莉,林家恒,张承慧

《中国工程科学》 2002年 第4卷 第9期   页码 54-58

摘要：

供水企业向来是城市的用电大户，其用电量主要体现在泵站水泵机组的电耗上。供水泵站的高效运行对节约电能、安全供水具有极为重要的意义。文章对供水泵站的效率优化问题进行了探讨，在提出用指数曲线准确地拟合水泵性能曲线的基础上，建立了供水栗站效率优化问题的数学模型，并设计了相应的遗传算法进行求解，仿真实验结果表明了该算法合理、有效。

关键词： 供水泵站     数值拟合     优化     遗传算法    

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针对Wimax中多用户的考虑状态转移损失的省电算法 Article

Bo LI,Sung-kwon PARK

《信息与电子工程前沿（英文）》 2016年 第17卷 第10期   页码 1085-1094 doi: 10.1631/FITEE.1500314

摘要： 概要：在IEEE 802.16e/m标准中，为了节省移动台（mobile subscriber station, MSS）的电量，定义了三种省电类型（power saving classes, PSC）。但是，标准中并未规定如何设置PSC的参数来最大化省电量和确保服务质量（quality of service, QoS）。因此，很多人提出了设置PSC参数的算法。这些算法中大部分只考虑了针对一个MSS的PSC参数设置。在针对多个MSS的算法中，MSS从工作状态到休眠状态转变的电量损失又未被考虑。本论文研究针对多MSS的PSC参数设置问题，并考虑MSS从工作状态到休眠状态转变的电量损失。该问题是NP难问题。我们为该问题提出了一个次优的算法。仿真结果表明我们提出的算法的性能优于当前最好的算法，并且接近于最优极限值。

关键词： 省电类型；状态转变损失；IEEE 802.16e/m；服务质量    

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水电站叠梁门多层取水下泄水温公式

高学平,陈弘,宋慧芳

《中国工程科学》 2011年 第13卷 第12期   页码 63-67

摘要：

对于温度成层型水库，水电站进水口分层取水方式通常被采用，目的是有选择地取用水库的不同层水体，减免下泄低温水对下游河流环境的负面影响。目前缺乏简单实用的分层取水下泄水温的预测公式。笔者针对糯扎渡水电站工程，试验模拟水库水温分布，量测下泄水温；依据大量的试验数据，建立下泄水温预测公式；所提出的公式得到了锦屏一级电站下泄水温试验数据的验证。

关键词： 温度成层型水库     水电站进水口     叠梁门     下泄水温公式     模型试验    

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标题 作者 时间 类型 操作

A review on the electric vehicle routing problems: Variants and algorithms

Hu QIN , Xinxin SU, Teng REN, Zhixing LUO

期刊论文

Power sources and electrical recharging strategies for implantable medical devices

WEI Xiaojuan, LIU Jing

期刊论文

Impact of renewable energies on the operation and economic situation of coal fired power stations: Actualsituation of coal fired power stations in Germany

Hans-Joachim KRAUTZ, Alexander LISK, Joachim POSSELT, Christian KATZER

期刊论文

Optimal precoding for full-duplex base stations under strongly correlated self-interference channels

Jun WANG, Xiao-jie WEN, Chuan HUANG, Chao-jin QING

期刊论文

Optimal locations of monitoring stations in water distribution systems under multiple demand patterns

Shuming LIU, Wenjun LIU, Jinduan CHEN, Qi WANG

期刊论文

Effect of strata restraint on seismic performance of prefabricated sidewall joints in fabricated subway stations

期刊论文

淮河生态经济带氢能运输走廊发展SWOT分析

张亮亮,刘 勇,周凌云

期刊论文

用遗传算法求解供水泵站的效率优化问题

廖莉,林家恒,张承慧

期刊论文

针对Wimax中多用户的考虑状态转移损失的省电算法

Bo LI,Sung-kwon PARK

期刊论文

水电站叠梁门多层取水下泄水温公式

高学平,陈弘,宋慧芳

期刊论文

郑浩：我国抽水蓄能电站建设运蒿调研反启示策略研究（2020年7月12日）

2022年06月10日

会议视频

郑浩：我国抽水蓄能电站建设运蒿调研反启示策略研究（2020年7月12日）

2022年06月10日

会议视频