检索结果-南通市图书馆

Compositions,Densities,and Refractive Indices for the Ternary Systems of PEG 400+CsCl+H2O at (15,25 and 35)℃

在线全文

cnki会议

学校读者我要写书评

暂无评论

Compositions,Densities,and Refractive Indices for the Ternar...

中国化学会第十五届全国化学热力学和热分析学术会议

作者： Yong-ning Kang,Shu-ni Li,quan-guo Zhai,Yu-Cheng Jiang, Man-Cheng Hu~* Key Laboratory of Macromolecular Science of Shaanxi Province,School of Chemistry and Materials Science,Shaanxi Normal University,Xi’ an,Shaanxi,710062,P.R.China.

In this work,we investigate the compositions,densities,and refractive indices for the ternary systems of PEG 400 + CsCl + HO at(15,25 and 35)℃.In all the cases,the presence of PEG 400 significantly reduces the solubi...

关键词：

Solubilities,Densities and Refractive Indices for the Ternary Systems Ethylene glycol + MNO3 + H2O(M = Rb and Cs) at(25 and 35)℃

在线全文

cnki会议

学校读者我要写书评

暂无评论

Solubilities,Densities and Refractive Indices for the Ternar...

中国化学会第十五届全国化学热力学和热分析学术会议

作者： Hui-Ying Zhang,Shu-ni Li,quan-guo Zhai,Yu-Cheng Jiang, Man-Cheng Hu~* Key Laboratory of Macromolecular Science of Shaanxi Province,School of Chemistry and Materials Science,Shaanxi Normal University,Xi’ an,Shaanxi,710062,P.R.China.

The solubilities,densities and refractive indices data for the four ternary systems ethylene glycol + MNO + HO(M = Rb and Cs) at different temperatures were measured,with mass fractions of ethylene glycol in the range...

关键词：

Liquid-Liquid Equilibria of[C6mim]Br+Rb2CO3/Cs2CO3+H2O Aqueous Two-Phase Systems at 298.15 K

在线全文

cnki会议

学校读者我要写书评

暂无评论

Liquid-Liquid Equilibria of[C6mim]Br+Rb2CO3/Cs2CO3+H2O Aqueo...

第十六届全国化学热力学和热分析学术会议

作者： Guan-Wei Yin,Shu-ni Li~*,quan-guo Zhai,Yu-Cheng Jiang, Man-Cheng Hu~* Key Laboratory of Macromolecular Science of Shanxi Province,School of Chemistry & Chemical Engineering,Shaanxi Normal University,Xi''an,Shanxi,710062,P.R.China

＜正＞Ionic liquids（ILs） are the latest solvent system that has attracted much attention for green chemistry ***-based aqueous two-phase systems（ATPSs） have been firstly reported by Rogers and co-workers in *** th... 详细信息

关键词： Ionic liquid Aqueous two-phase systems Rb2CO3 Cs2CO3

Liquid-Liquid Equilibria for Methanol +M2CO3(M = Na,K,Rb and Cs) + Water Quaternary Systems at Different Temperatures

在线全文

cnki会议

学校读者我要写书评

暂无评论

Liquid-Liquid Equilibria for Methanol +M2CO3(M = Na,K,Rb and...

中国化学会第十五届全国化学热力学和热分析学术会议

作者： Yong-ning Kang,Shu-ni Li,quan-guo Zhai,Yu-Cheng Jiang,Man-Cheng Hu~* Key Laboratory of Macromolecular Science of Shaanxi Province,School of Chemistry and Materials Science,Shaanxi Normal University,Xi’an,Shaanxi,710062,P.R.China.

Liquid-liquid equilibria for the quaternary systems of CHOH + RbCO + KCO + HO and CHOH +RbCO+ CsCO + HO were measured at T 298.15,308.15,and 318.15) *** curves,tie-lines, and integrated,phase diagrams for the two tern...

关键词：

在线全文

cnki会议

学校读者我要写书评

暂无评论

飞秒激光氘团簇聚变

物理 2000年第5期29卷 300-303页

作者：雷安乐黎忠倪国权徐至展中国科学院上海光学精密机械研究所上海201800

简要介绍了原子团簇的产生方法和特点以及激光惯性约束核聚变的基本原理 .氘团簇在飞秒激光的作用下 ,大量吸收激光能量 ,产生了高离化态高能离子。

关键词：激光惯性约束聚变飞秒激光氚团簇

维普期刊数据库

CaH2-promoted activity of ni-carbonate interface for CO2 methanation

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2025年第1期100卷 522-532页

作者： Jin-Peng Wang guo-Cui Mao Hui-Lin Jiang Bao-Xia Dong Yun-Lei Teng School of Chemistry and Chemical Engineering Yangzhou University

Transition metal-carbonate interfaces often act as active sites in heterogeneous catalytic *** interface between transition metal and metal carbonate exhibits a dynamic equilibrium during the CO2hydrogenation reaction,involving surface carbonate hydrogenation and ***,there have been few reports on engineering the activity of the interface between transition metal and alkaline earth metal carbonate for catalytic *** work demonstrated that the incorporation of CaH2in ni/CaCO3enhances the CO2methanation activity of the *** CO2conversion for ni/CaH2-CaCO3reached 68.5%at 400°C,which was much higher than that of the ni/CaCO3（31.6%） and ni/CaH2-CaO （42.4%） ***,the ni/CaH2-CaCO3catalysts remained stable during the stability test for 24 h at 400°C and 8 *** research revealed that CaH2played a crucial role in promoting the activity of the ni-carbonate interface for ***2could modify the electronic structure of ni and tune the structural properties of CaCO3to generate medium basic sites （OH groups）,which are favorable for the activation of H2and ***-situ Fourier transform infrared spectroscopy （FTIR） analysis combined with density functional theory calculations demonstrated that CO2activation occurs at the hydroxyl group （OH） on the CaH2-modified ni-carbonate surface,leading to the formation of CO3H****,our study has confirmed that CO2methanation over the ni/CaH2-CaCO3catalysts proceeds via the formate pathway.

关键词： CO 2 methanation Metal hydride ni catalysts Carbonate Metal-carbonate interface

Spatial variation of health risk of groundwater for drinking water supply in Mingshan County,Ya'an City,China

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Water Science and Engineering 2010年第4期3卷 454-466页

作者： Fu-quan ni guo-dong LIU Yao-sheng TAN Yu DENG State Key Laboratory of Hydraulics and Mountain River Engineering Sichuan University Chengdu 610065 P. R. China College of Information and Engineering Sichuan Agricultural University Ya ＇an 625014 P. R. China College of Civil Engineering Tianjin University Tianjin 300072 P. R. China Key Laboratory of Sichuan Agricultural Environment Engineering Sichuan Agricultural University Ya ＇an 625014 P. R. China

Rural drinking water safety is a growing concern in China. This study investigated the health risk of pollution of groundwater for the drinking water supply in Mingshan County, Ya＇an City, in Sichuan Province, China, using 46 samples from the years 1991 to 2010. Carcinogenic, non-carcinogenic, and total risks were assessed by the model recommended by the United States Environmental Protection Agency （U.S. EPA）. Thematic maps of the risks caused by single and multiple factors were generated from inverse distance weighting interpolation （IDW） and the geostatistical analysis functions of ArcGIS. The results show that the carcinogenic risks caused by chemicals in groundwater for drinking water supply are low, within the acceptable interval for risk management. However, non-carcinogenic risks are high and the number of sampling sites with risk values exceeding the standards amounted to 29. Non-carcinogenic risks of Cr6＋, nitrate, fluoride, and Fe at sites 43, 46, 50, 64, 67, and 74 were the sources that caused high total health risk. This study reveals the risk level of groundwater quality and orders of treatment of pollutants, and provides a scientific basis for groundwater management in this area.

关键词： groundwater for drinking water supply water safety health risk assessment (HRA) Ya 'an City

维普期刊数据库

Auxiliary ligand-directed assembly of a non-interpenetrated cage-within-cage metal-organic framework for highly efficient C_(2)H_(2)/CO_(2) separation

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Structural Chemistry 2023年第6期42卷 22-26页

作者： Yong-Peng Li Jing-Jing ni Shu-Cong Fan quan-guo Zhai School of Chemistry and Chemical Engineering Institute of Applied CatalysisYantai UniversityYantaiShandong 264005China Key Laboratory of Macromolecular Science of Shaanxi Province School of Chemistry&Chemical Engineering Shaanxi Normal UniversityXi'an710062China

The development of metal-organic frameworks(MOFs)with highly efficient adsorption and separation of acet-ylene is very important and challenging in chemical industry due to the explosive nature of *** MOFs can be constructed by inserting a second auxiliary ligand,which allows the use of large ligands to construct non-interpenetrated structures and increase pore ***,SNNU-205 is successfully synthesized,which connects two sets of interpenetrated structures to form a double walled cage-within-cage structure by using the introduction of a second auxiliary *** modified pore environment enables SNNU-205 to efficiently selectively adsorb C_(2)H_(2)over CO_(2).At 298 K and 1 atm,SNNU-205 can uptake much more C_(2)H_(2)(76.3 cm^(3)g1)than CO_(2)(47.3 cm^(3)g^(-1)),resulting in a high substance ratio of C_(2)H_(2)-to-CO_(2)(1.6).More importantly,the ideal adsorbed solution theory selectivity calculations and column breakthrough tests further indicate SNNU-205 to be promising adsorbents for C_(2)H_(2)adsorption and purification.

关键词： Metal-organic frameworks(MOFs) Second auxiliary ligand Acetylene storage Acetylene/carbon dioxide separation

Cavitation of a Submerged Jet at the Spherical Valve Plate/Cylinder Block Interface for Axial Piston Pump

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Mechanical Engineering 2020年第5期33卷 197-211页

作者： Bin Zhao Weiwei guo Long quan College of Mechanical and Vehicle Engineering Taiyuan University of TechnologyTaiyuan 030024China Transducers and Intelligent Control System of Ministry of Education and Shanxi Province Taiyuan University of TechnologyTaiyuan 030024China The State Key Laboratory of Fluid Power&Mechatronic Systems Zhejiang UniversityHangzhou 310027China

The spherical valve plate/cylinder block pair has the advantages of strong overturning resistance and large bearing ***,the configurations of the unloading and pre-boosting triangular grooves on the spherical valve plate are different from those in the planar valve plate,resulting in special cavitation phenomenon on the spherical port plate *** order to study cavitation characteristics of spherical port plate pair,a dynamic CFD model of the piston pump including turbulence model,cavitation model and fluid compressibility is established.A detailed UDF compilation scheme is provided for modelling of the micron-sized spherical oil film mesh,which makes up for the lack of research on the meshing of the spherical oil *** this paper,using CFD simulation tools,from the perspectives of pressure field,velocity field and gas volume fraction change,a detailed analysis of the transient evolution of the submerged cavitation jet in a axial piston pump with spherical valve plate is carried *** study indicates the movement direction of the cavitation cloud cluster through the cloud image and the velocity vector direction of the observation *** sharp decrease of velocity and gas volume fraction indicates the collapse phenomenon of bubbles on the part wall *** discoveries verify the special erosion effect in case of the spherical valve plate/cylinder block *** submerged cavitation jet generated by the unloading triangular grooves distributed on the spherical valve plate not only cause denudation of the inner wall surface of the valve plate,but also cause strong impact and denudation on the lower surface of the cylinder ***,the direction of the unloading triangular groove was modified to extend the distance between it and the wall surface which can effectively alleviate the erosion effect.

关键词： Cavitation submerged jet Spherical valve plate/cylinder block pair Axial piston pump

维普期刊数据库