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Antibacterial Mechanism of Copper-bearing Antibacterial Stainless Steel against ***

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Journal of Materials Science & Technology 2008年第2期24卷 197-201页

作者： Li NAN Weichao YANG yongqian liu Hui XU Ying LI Manqi LU Ke YANG Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China Institute of Applied Ecology Chinese Academy of Sciences Shenyang 110016 China Graduate School of Chinese Academy of Sciences Beijing 100049 China

A preliminary study was made on the antibacterial mechanism of copper-bearing antibacterial stainless steels against *** through experiments of microbiology such as EDTA （ethylenediaminetetraacetic acid） complexing, DNA smearing and AFM （atomic force microscope） observation. It was measured that the antibacterial stainless steels showed excellent antibacterial functions with antibacterial rate to *** over 99.99%. The antibacterial rate was weak if the bacteria solution was complexed by EDTA, indicating that the copper ions play a dominant role in the antibacterial effect of the antibacterial stainless steels. The electrophoresis experiment did not show the phenomenon of DNA smearing for *** after contacting antibacterial stainless steels, which meant that DNA of *** was not obviously damaged. It was observed by AFM that the morphology of *** changed a lot after contacting antibacterial stainless steels, such as cell walls being seriously changed and lots of contents in the cells being leaked.

关键词： Copper Stainless steel E.coli Antibacterial mechanism

An optimized short-term wind power interval prediction method considering NWP accuracy

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Chinese Science Bulletin 2014年第11期59卷 1167-1175页

作者： yongqian liu Jie Yan Shuang Han Infield David De Tian Linyue Gao State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power University (NCEPU) Department of Electronic and Electrical Engineering University of Strathclyde

In recent years, the accuracy of the wind power prediction has been urgently studied and improved to satisfy the requirements of power system operation. In this paper, the relevance vector machine(RVM)-based models are established to predict the wind power and its interval for a given confidence level. An NWP improvement module is presented considering the characteristic of NWP error. Moreover, two parameter optimization algorithms are applied to further improve the prediction model and to compare each performance. To take three wind farms in China as examples, the performance of two RVM-based models optimized, respectively, by genetic algorithm(GA)and particle swarm optimization(PSO) are compared with predictions based on a genetic algorithm–artificial neural network(GA–ANN) and support vector machine. Results show that the proposed models have better prediction accuracy with GA–RVM model and more efficient calculation with PSO–RVM.

关键词：参数优化算法区间预测预测精度风电场预测模型支持向量机短期电力系统运行

Assessment Method of Offshore Wind Resource Based on Multi-dimenssiional Indexes System

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CSEE Journal of Power and Energy Systems 2024年第1期10卷 76-87页

作者： Xiaomei Ma yongqian liu Jie Yan Shuang Han Li Li Hang Meng Muhammet Deveci Konstanze Kolle Umit Cali the State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources(NCEPU) School of New EnergyNorth China Electric Power UniversityBeijing 102206China School of Physical and Electronic Information Engineering Qinghai Normal UniversityXiningQinghai 810016China State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources(NCEPU) School of New EnergyNorth China Electric Power UniversityBeijing 102206China the Royal School of Mines Imperial College London.London SW72AZUKand also with Department of Industrial EngineeringTurkish Naval AcademyNational Defence University34940IstanbulTurkey Department of Energy Systems SINTEF Energy ResearchTrondheimNO-7034 Norway Department of Electric Power Engineering Norwegian University of Science and TechnologyTrondheimNO-7491 Norway

Traditional assessment indexes could not fully describe offshore wind resources,for the meteorological properties of offshore are more complex than *** a result,the uncertainty of offshore wind power projects would be increased and final economic benefits would be ***,a study on offshore wind resource assessment is carried out,including three processes of“studying data sources,conducting multidimensional indexes system and proposing an offshore wind resource assessment method based on analytic hierarchy process(AHP).First,measured wind data and two kinds of reanalysis data are used to analyze the characteristics and reliability of data ***,indexes such as effective wind speed occurrence,affluent level occurrence,coefficient of variation,neutral state occurrence have been proposed to depict availability,richness,and stability of offshore wind resources,*** with existing parameters(wind power density,dominant wind direction occurrence,water depth,distance to coast),a multidimensional indexes system has been built and on this basis,an offshore wind energy potential assessment method has been ***,the proposed method is verified by the annual energy production of five offshore wind turbines and practical operating data of four offshore wind farms in *** study also compares the ranking results of the AHP model to two multi-criteria decision making(MCDM)models including weighted aggregated sum product assessment(WASPAS)and multi-attribute ideal real comparative analysis(MAIRCA).Results show the proposed method gains well in practical engineering applications,where the economic score values have been considered based on the offshore reasonable utilization hours of the whole life cycle in China.

关键词： Annual energyproduction aatmospheric stability data sources offshore wind resource wind power density

Cenozoic Stratigraphy Deformation History in the Central and Eastern of Qaidam Basin by the Balance Section Restoration and its Implication

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Acta Geologica Sinica(English Edition) 2009年第2期83卷 359-371页

作者： liu Dongliang FANG Xiaomin GAO Junping WANG Yadong ZHANG Weilin MIAO Yunfa liu yongqian ZHANG Yuezhong Center of Basin Resources and Environment Institute of Tibetan Plateau Research Chinese Academy of Sciences Beijing 100085 China Graduate School Chinese Academy of Sciences Beijing 100049 China Key Laboratory of Western China＇s Environmental Systems Ministry of Education of China College of Resources and Environment Lanzhou University Lanzhou 730000 China Research Institute of Petroleum Exploration and Development PetroChina Qinghai Oilfield Company Dunhuang Gansu 736202 China

The Qaidam Basin, located in the northern margin of the Qinghai-Tibet Plateau, is a large Mesozoic-Cenozoic basin, and bears huge thick Cenozoic strata. The geologic events of the Indian- Eurasian plate-plate collision since -55 Ma have been well recorded. Based on the latest progress in high-resolution stratigraphy, a technique of balanced section was applied to six pieces of northeast- southwest geologic seismic profiles in the central and eastern of the Qaidam Basin to reconstruct the crustal shortening deformation history during the Cenozoic collision. The results show that the Qaidam Basin began to shorten deformation nearly synchronous to the early collision, manifesting as a weak compression, the deformation increased significantly during the Middle and Late Eocene, and then weakened slightly and began to accelerate rapidly since the Late Miocene, especially since the Quaternary, reflecting this powerful compressional deformation and rapid uplift of the northern Tibetan Plateau around the Qaidam Basin.

关键词： balance section shortening deformation history Qaidam Basin uplift of the TibetanPlateau

INSULATOR TO SUPERCONDUCTOR TRANSITION OF Pb DOPED 2201 SINGLE CRYSTAL IN Bi-SYSTEM BY OXYGEN DEFICIENCY

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Chinese Physics Letters 1990年第11期7卷 526-528页

作者： liu yongqian HUANG Yuzhen CHEN Liquan CHEN Hong LI Jianqi NI Yongming JIA Shunlian ZHAO Zhongxian Institute of Physics Academia SinicaBeijing 100080

Flux method was used to grow large 2201 single crystal in Bi-Sr-Cu *** as-grown crystal was nonsuperconductor and showed semiconductivity in resistivity *** it was reduced in flowing N_(2) at 570℃ and appropriate oxygen vacancies were induced,supcrconductivity with T_(c)^(on)=6K was *** great influence of oxygen deficience on 3uperconductivity is ***,the incorporation of Pb adjusted the modulation pattern.

关键词： curve oxide conductivity

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多主体参与的区域科技成果转化影响因素

同济大学学报（自然科学版） 2020年第12期48卷 1828-1835页

作者：刘永千同济大学经济与管理学院上海200092

科技成果转化是一个多主体参与、多目标并存的复杂过程。为全面掌握影响科技成果转化活动的核心因素,通过对上海204家企业、中介、高校院所、政府机构的问卷调查与数据分析,构建了相应的结构方程模型。研究结果显示:上海科技成果转化面... 详细信息

科技成果转化是一个多主体参与、多目标并存的复杂过程。为全面掌握影响科技成果转化活动的核心因素,通过对上海204家企业、中介、高校院所、政府机构的问卷调查与数据分析,构建了相应的结构方程模型。研究结果显示:上海科技成果转化面临供需两端问题,面向高校与科研院所的政策变量虽有利于科技成果转化,但管理模式与手段尚未同步跟进;同时,企业需求端的吸收能力有待提升,下一步公共政策供给应聚焦企业创新能力提升。

关键词：科技成果转化多主体参与上海区域结构方程模型

Quantitative method for evaluating detailed volatility of wind power at multiple temporal-spatial scales

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Global Energy Interconnection 2019年第4期2卷 318-327页

作者： yongqian liu Han Wang Shuang Han Jie Yan Li Li Zixin Chen State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources NorthChina Electric Power UniversityBeijing102206P.R.China Chifeng Branch of China Datang Corporation Chifeng City024000Inner Mongolia AutonomousRegionP.R.China

With the increasing proportion of wind power integration, the volatility of wind power brings huge challenges to the safe and stable operation of the electric power system. At present, the indexes commonly used to evaluate the volatility of wind power only consider its overall characteristics, such as the standard deviation of wind power, the average of power variables, etc., while ignoring the detailed volatility of wind power, that is, the features of the frequency distribution of power variables. However, how to accurately describe the detailed volatility of wind power is the key foundation to reduce its adverse influences. To address this, a quantitative method for evaluating the detailed volatility of wind power at multiple temporal-spatial scales is proposed. First, the volatility indexes which can evaluate the detailed fluctuation characteristics of wind power are presented, including the upper confidence limit, lower confidence limit and confidence interval of power variables under the certain confidence level. Then, the actual wind power data from a location in northern China is used to illustrate the application of the proposed indexes at multiple temporal(year–season–month–day) and spatial scales(wind turbine–wind turbines–wind farm–wind farms) using the calculation time windows of 10 min, 30 min, 1 h, and 4 h. Finally, the relationships between wind power forecasting accuracy and its corresponding detailed volatility are analyzed to further verify the effectiveness of the proposed indexes. The results show that the proposed volatility indexes can effectively characterize the detailed fluctuations of wind power at multiple temporal-spatial scales. It is anticipated that the results of this study will serve as an important reference for the reserve capacity planning and optimization dispatch in the electric power system which with a high proportion of renewable energy.

关键词： Wind power Detailed volatility Frequency distribution Multiple temporal-spatial scales Typical days Forecasting accuracy

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循环载荷作用下煤体渗透率演化的实验分析

煤炭学报 2019年第8期44卷 2579-2588页

作者：刘永茜煤炭科学技术研究院有限公司安全分院煤炭科学研究总院煤炭资源高效开采与洁净利用国家重点实验室

多期次载荷作用下的煤体,其孔隙结构会发生复杂变化,渗透率也随之改变。然而,不同加卸载速率与循环周期决定着煤体渗透率变化路径,影响其应力敏感性,开展循环载荷控制下煤体渗透率演化规律研究,对于解释复杂应力场下煤层渗透率的各向异... 详细信息

多期次载荷作用下的煤体,其孔隙结构会发生复杂变化,渗透率也随之改变。然而,不同加卸载速率与循环周期决定着煤体渗透率变化路径,影响其应力敏感性,开展循环载荷控制下煤体渗透率演化规律研究,对于解释复杂应力场下煤层渗透率的各向异性特征有理论支撑作用。借助于煤层渗透率应力敏感模型分析,研究了影响煤体渗透率变化的关键表征参数及其函数关系;为验证关键参数对煤体渗透率影响,采用预定轴压和气压、加卸载围压的方式开展煤体三轴循环变载气体渗流实验,分析在不同围压(2.0~12.0 MPa)下煤体渗透率和体应变的演化规律;为研究煤体孔隙结构变化对渗透率的影响,通过低温氮气吸附实验和荧光显微镜煤样观测统计,完成了循环载荷加卸载前后煤体孔隙结构变化对比。研究结果表明,煤体加载/卸载过程中渗透率变化趋势与围压变化负相关,总体可以分为线性段、指数段和稳定段等3个阶段;随循环加载次数的增加煤体应变逐步增大,而渗透率却随之降低;相同条件下,煤体渗透率随体应变增加而升高,增幅在16.79%以上,而渗透率恢复率逐步降低,且与围压变化负相关;3次循环加卸载实验导致煤体孔隙结构发生了显著变化,微孔体积提高71.79%,比表面积增加52.19%,而平均孔径降低32.06%,但循环载荷没有改变煤体的最可几孔径;孔隙结构变化的数据表明,微孔体积增加是煤体渗透率劣化的重要标志之一。对比循环载荷作用前后的孔隙结构实验数据发现,影响气体吸附-解吸的孔隙结构变化,决定了“迟滞环”面积,而决定“迟滞环”形状的关键因素是由煤体最可几孔径控制的突变压力。另外,煤体应变包括裂隙体积变化和孔隙体积变化两部分,其中裂隙影响重要度指标(χ)反映了裂隙体积变化在煤体应变中的权重关系,χ变化随围压升高而降低。

关键词：循环加卸载裂隙渗透率演化应力敏感损伤变量

Status and development of mineral wool made from molten blast furnace slag

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Baosteel Technical Research 2011年第2期5卷 3-8页

作者： XIAO Yongli liu Yin LI yongqian Ironmaking Resources ＆ Environment Division Research Institute Baosteel Iron ＆ Steel Co. Ltd. Shanghai 201900 China

This study describes the characteristics of mineral wool and its applications,and also introduces the traditional process of mineral wool made from molten blast furnace （BF） slag. Compared with high energy consumption of the traditional process,the production of mineral wool by using molten BF slag will be able to take full advantage of the sensible heat of molten slag, and also reduce production costs. However, there are also further issues to resolve such as how to obtain the required amount of molten BF slag and how to make it homogeneous. Based on the physical and chemical properties of the molten BF slag,the investigation into the relationship between temperature and viscosity under different acidity coefficients of the slag and silicon mixture was conducted. Combined with the crystallization and phase diagram of slag wool, its heat resistance, water resistance, durability and corrosion resistance were analyzed. Finally, trends of the technology development are proposed.

关键词： mineral wool molten blast furnace (BF) slag fibering characteristics