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Comprehensive benefit of flood resources utilization through dynamic successive fuzzy evaluation model: A case study

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中国科学：技术科学英文版 2010年第2期53卷 529-538页

作者： FENG Feng1,2, XU ShiGuo1, LIU JianWei1, LIU Dan1,3.& WU Bo4 1 Institute of water Environment, School of Civil and Hydraulic Engineering, Dalian University of Technology, Dalian 116024, china.2 Yellow River Conservancy Technical Institute, Kaifeng 475003. china.3.College of water resources, shenyang Agricultural University, shenyang 110161, china.4 Office of Flood Control and Draught Relief in Jilin Province, Changchun 13.03., china Institute of water Environment School of Civil and Hydraulic Engineering Dalian University of Technology Yellow River Conservancy Technical Institute

Taking the flood resources utilization in Baicheng, Jilin during 2002–2007 as the research background, and based on the entropy weight and multi-level & multi-objective fuzzy optimization theory, this research established a multi-level & semi-constructive index system and dynamic successive evaluation model for comprehensive benefit evaluation of regional flood resources utilization. With the year 2002 as the base year, the analyzing results showed that there existed a close positive correlation between flood utilization volume and its benefits, comprehensive evaluation value and its comparison increment. Within the six successive evaluation years, the comprehensive benefit of 2003.was the best, in which the benefit evaluation increment reached 82.8% whereas the year of 2004 was the worst, in which the increment was only 18.2%. Thus the sustainability and correctness of the evaluation were verified by six years successive evaluation and increment comparison. The analyzing results showed that the economic benefits, ecological benefits and social benefits of flood utilization were remarkable, and that the comprehensive benefit could be improved by increasing flood utilization capacity, which would promote the regional sustainable development as well. The established dynamic successive evaluation provides a stable theoretical basis and technical support for further flood utilization.

关键词： flood resources utilization comprehensive benefit dynamic successive fuzzy evaluation Baicheng City

Precipitation of α_2 Phase in α+β Solution-Treated and Air-cooled Ti-Al-Sn-Zr-Mo-Si-Nd Alloys

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Journal of Materials Science & Technology 2001年第3期17卷 315-317页

作者： Jun ZHANG and Dong LI Institute of Metal Research, Chinese Academy of Sciences, shenyang 110016, china.resent address: shenyang University, shenyang 110044, china.E-mail: zhjun14@*** Inst. of Metal Res. Chinese Acad. of Sci. Shenyang 110016 China

A series of Ti-Al-Sn-Zr-Mo-Si-Nd alloys with various content of Al were solution treated in α+β phase field and air-cooled. The precipitation of a2 phase in cooling was investigated by transmission electron microscopic analysis The precipitation characteristic of α2 phase was discussed. The precipitation of α2 phase would proceed by the nucleation and growth of α2 phase dependent on the diffusion of Al atoms. And a comparison on the difference of precipitation of α2 phase was carried out under the conditions of air-cooling and quenching in water. The investigation showed that the air-cooling and even quenching could supply enough time for the precipitation and growth of α2 phase when Al content reached a certain value even though far away from the stoichiometric composition of Ti3.l.

关键词： Al Precipitation of Phase in Solution-Treated and Air-cooled Ti-Al-Sn-Zr-Mo-Si-Nd Alloys Ti Mo Sn Zr Nd Si

Combination of drainage, water supply and environmental protection as well as rational distribution of water resource in Zhengzhou mining district

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Science china.Earth Sciences 2005年第10期48卷 1768-1779页

作者： WU Qiang1, LI Duo1,2, DI Zhiqiang3. MIAO Ying3. ZHAO Suqi4 & GUO Qiwen5 1. Resource Exploitation Engineering College, CUMT, Beijing 100083. china.2. Shijiazhuang Engineering College, University of Economics, Shijiazhuang 05003., china.3. shenyang Institute of Geology and Mineral {3., shenyang 11003., china.4. State Adminstration of Coal Mine Safety, Beijing 100013. china.5. Zhengzhou Coal Mine Company (Group), Zhengzhou 4523.1, china Resource Exploitation Engineering College CUMT University of Economics shenyang Institute of Geology and Mineral resources State Adminstration of Coal Mine Safety Zhengzhou Coal Mine Company (Group)

The geological condition of coalfield is much complex in china. With increasing in mining depth and drainage amount, the contradiction of drainage, water supply and environ-mental protection is becoming more and more serious. However, the contradiction can be solved by the scientific management of optimizing combination of drainage, water supply and environ-mental protection. The Philip multiple objectives simplex method used in this article has searched for a possible solution at the first step, and then it goes on searching to find out whether there is a weight number that can lead the solution to the biggest. It can reduce the randomness and diffi-culty of traditional weight method which determine the weight number artificially. Some beneficial coefficients are vague and the number is larger in the model of water resource dispatch. So the vague layer analysis method can consider these vague factors fully, combining the qualitative and quantitative analysis together. Especially, this method can quantify the experiential judge-ment of policy decider, and it will turn to be more suitable if the structure of objective factors is complex or the necessary data are absent. In the paper, the two methods above are used to solve the plans of drainage, water supply and optimizing distribution of water resource in the Zhengzhou mining district.

关键词： combination of drainage, water supply and environmental protection, Philip multiple objective simplex method, vague layer analysis method, distribution of water resource.

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不同底质条件下苦草根部细菌群落的组装模式

水资源保护 2024年第4期40卷 109-117页

作者：张文龙王新梓潘沈阳周鹏程李轶河海大学浅水湖泊综合治理与资源开发教育部重点实验室江苏南京210098 河海大学环境学院江苏南京210098

通过室内试验模拟不同底质条件,研究了苦草根部细菌群落的组装模式和功能变化。结果表明:底质条件的改变对苦草根际细菌群落产生了显著影响(p=0.003.,特别是在添加有机质和植物根际促生菌的底质条件下;尽管根际细菌群落与根内生菌群落... 详细信息

通过室内试验模拟不同底质条件,研究了苦草根部细菌群落的组装模式和功能变化。结果表明:底质条件的改变对苦草根际细菌群落产生了显著影响(p=0.003.,特别是在添加有机质和植物根际促生菌的底质条件下;尽管根际细菌群落与根内生菌群落存在较强联系,但根内生菌群落组装过程拥有更高的确定性,而根际细菌群落组装过程更易受到植物宿主以外叠加的环境因素影响;功能预测结果表明在添加有机质和植物根际促生菌的条件下,苦草根部细菌群落拥有更高的代谢活性,更有利于有益细菌群落在苦草根部的富集。

关键词：底质条件苦草根际细菌群落根内生菌群落组装模式

维普期刊数据库博看期刊

Prediction of the thermodynamic properties of 1-alkyl-3.methylimidazolium lactate ionic liquids [C_nmim][Lact](n=2,3.4,5,and 6) by parachor

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Science china.Chemistry 2010年第12期53卷 2564-2570页

作者： FANG DaWei 1,3.TONG Jing 2,GUAN Wei 2,WANG Han 2 & YANG JiaZhen 1,3.1 Institute of Rare and Scattered Elements Chemistry,Liaoning University,shenyang 11003.,china.2 College of Chemistry,Liaoning University,shenyang 11003.,china.3.Key Laboratory of Rare and Scattered Elements,Liaoning Province,shenyang 11003.,china Institute of Rare and Scattered Elements Chemistry Liaoning University Shenyang China Key Laboratory of Rare and Scattered Elements Liaoning Province Shenyang China College of Chemistry Liaoning University Shenyang China

An ionic liquid (IL) based on lactate,1-butyl-3.methylimidazolium lactate ([C4mim][Lact]),has been prepared and characterized by 1H nuclear magnetic resonance (NMR) spectroscopy and differential scanning calorimetry (DSC).Since the IL can form strong hydrogen bonds with water,trace water is a problematic impurity in the *** the standard addition method (SAM),the density,refractive index and surface tension of [C4mim][Lact] were measured in the temperature range (3.8.15 to 3.3.15 ± 0.05) *** the basis of the experimental data,the parachor and molar volume for [C4mim][Lact],and the molecular volume V m,surface tension γ,molar enthalpy of vaporization △lgHm 0,refractive index n D,and the thermal expansion coefficients,for the homologues [Cnmim][Lact] (n=2,3.4,5,and 6) were estimated using semi-empirical *** estimated values are in good agreement with the experimental data.

关键词： parachor lactate ionic liquid density surface tension refractive index

MAfHEMAfICAL MODEL FOR MELTING PROCESSES OF SOLID ARTICLES IMMERSED IN METAL BATHS

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Acta Metallurgica Sinica(English Letters) 1999年第3期12卷 259-266页

作者： B.K. Li X.F. Ma X.R. Zhang and J.C. He (Northeastern University, shenyang 110006, china.(Northeastern University, shenyang 110006, china.(Northeastern University, shenyang 110006, china.(Northeastern University, shenyang 110006, china. Northeastern University Shengyang China

A mathematical model for melting processes of solid particles immersed in metal baths has been develOPed, which includes the cases with the melting point of solid particles greater than, equal to, and lower than freezing point of the bath. Experiments are performed on the melting of ice spheres in water at different temperature. The model is validated by experimental data for melting of ice spheres submerged in water and aluminum spheres immersed in aluminum melt. Finally, the parometers affecting particles melting time such as particle size, bath temperature, and slip velocity are analyzed.

关键词： mathematical model phase change solid particle

Planning and Design of the shenyang Round-the-City water System and the Green Zone Project

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china.City Planning Review 1990年第4期7卷 77-81,76页

作者： The shenyang Institute of Urban Planning and Design WangDi The shenyang Institute of Urban Planning and Design

The shenyang round-the-city watersystem and the green zone project was plan-ned and implemented under the guidance ofthe master plan of the *** project in-cludes the three artificial rivers(Nanyun Riv-er,Xinkai River ... 详细信息

关键词： Planning and Design of the shenyang Round-the-City water System and the Green Zone Project Design

THREE-DIMENSIONAL SIMULATION FOR EFFECTS OF BED DISCORDANCE ON FLOW DYNAMICS AT Y-SHAPED OPEN CHANNEL CONFLUENCES

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Journal of Hydrodynamics 2007年第5期19卷 587-593页

作者： WANG Xiao-gang YAN Zhong-min GUO Wei-dong College of water Conservancy and Hydropower Engineering Hohai University Nanjing 210098 China College of water Conservancy Shenyang Agricultural University Shenyang 110161 China

Channel confluences are universally present in nature. They can be divided into two types： asymmetrical river confluences and symmetric river confluences. The latter is also called as the Y-shaped confluences. Most of previous work has paid more attention to the asymmetrical river confluences, but few studies have been conducted on the Y-shaped confluences. In this article, the effects of bed discordance on the flow patterns at ＂Y＂ shaped open-channel confluences were studied by using a 3.D numerical simulation. It is proved that the model can undertake quantitative assessment of the flow at confluences. The results indicate that there are a lot of differences between the Y-shaped confluence and asymmetrical confluence. The discordant bed height plays an important role at the Y-shaped junction.

关键词： Y-shaped junction discordant bed height,separation zone numerical simulation turbulent intensity,secondary flow lateral mixing

Research on Solidification Structure of Billet for Bearing Steel

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稀有金属材料与工程 2011年第S3期40卷 220-223页

作者： Liu Chengjun, Wang Hongpo, Jiang Maofa Northeastern University, shenyang 110004, china Northeastern Univ Coll Mat & Met Shenyang 110004 Peoples R China

Secondary dendrite arm spacing (SDAS), which is an important parameter for solidification structure, has a significant effect on the level of segregation and the time for dispelling micro-segregation. The solidification structure of billets, poured under different drawing speeds for high-carbon chromium continuous casting and etched by saturated water solution of picric acid, was investigated by OLYMPUS BX51 optical microscope; and the indexes of carbon and sulfur segregation were also determined. It is concluded that the solidification structure consists of fine grain region, columnar region, cross dendrite region and central equiaxed grain region. In the columnar grain region, the SDAS at outer arc of billet is about 3. μm bigger than that of inner arc; the SDAS increases with the increasing drawing speed and the indexed of carbon and sulfur segregation change from positive segregation to the negative with the increasing SDAS. The SDAS can be used as an important parameter not only to establish reasonable secondary cooling system and drawing speed but also to judge the level of segregation in the unidirectional solidification region.

关键词： bearing steel solidification structure secondary dendrite arm spacing drawing speed segregation