检索结果-南通市图书馆

The Geographic Information Grid System Based on Mobile Agent

在线全文

学校读者我要写书评

暂无评论

Wuhan University Journal of Natural Sciences 2006年第1期11卷 304-308页

作者： shen Zhi-dong TONG Qiang HUANG xian-feng WANG Hua-min School of Computer Wuhan University Wuhan 430072 Hubei China Software College Northeastern University Shenyang 110004 Liaoning China State Key Laboratory of Information Engineering in Surveying Mapping and Remote Sensing Wuhan University Wuhan 430072 Hubei China Research Center of Spatial Information and Digital Engineering Wuhan University Wuhan 430072 Hubei China

We analyze the deficiencies of current application systems, and discuss the key requirements of distributed Geographie Information serviee （GIS）, We construct the distributed GIS on grid platform. Considering the flexibility and efficiency, we integrate the mobile agent technology into the system. We propose a new prototype system, the Geographic Information Grid System （GIGS） based on mobile agent. This system has flexible services and high performance, and improves the sharing of distributed resources. The service strategy of the system and the examples are also presented.

关键词： grid geographic information system (GIS) spatial data mobile agent

Synthesis of b-type Strontium Hydrogen Phosphate Nanosheets and Its Immobilization of Pb^(2+) in Acidic Aqueous Solution

在线全文

学校读者我要写书评

暂无评论

Acta Metallurgica Sinica(English Letters) 2015年第4期28卷 438-443页

作者： Fu-Qiang Zhuang Rui-Qin Tan Wen-Feng shen xian-Peng Zhang Wei Xu Wei-Jie Song Faculty of Electrical Engineering and Computer Science Ningbo University Ningbo Institute of Material Technology and Engineering Chinese Academy of Sciences

Highly crystalline β-type strontium hydrogen phosphate （β-SrHPO4） nanosheets were prepared by a hydro- thermal method and used for the immobilization of lead ions （Pb2＋） from acidic aqueous solution. The effects of various parameters on the immobilization process, including solution pH value, contact time, initial ion concentrations, and coexistent competing cations, were studied to optimize the conditions for maximum immobilization. The β-SrHPO4 nanosheets exhibited a capacity of （1,120 ± 22） mg/g toward Pb2＋ in acidic solution （pH value is 3.0）, and the equilibrium was achieved within 8 rain. The competing cations such as Cu2＋, Zn2＋, Cd2＋, and Co2＋ affected slightly on the selective immobilization of Pb2＋. The results revealed that the removal mechanism of Pb2＋ by the β-SrHPO4 nanosheets was the dissolution/precipitation process in the acidic solution.

关键词： Strontium hydrogen phosphate Nanosheets Immobilization Lead ions Dissolution/precipitation

External control of qubit-photon interaction and multi-qubit reset in a dissipative quantum network

在线全文

学校读者我要写书评

暂无评论

Science China(Physics,Mechanics & Astronomy) 2021年第5期64卷 11-21页

作者： xian-Peng Zhang Li-Tuo shen Yuan Zhang Luyan Sun Huaizhi Wu Zhen-Biao Yang Zhang-Qi Yin Fujian Key Laboratory of Quantum Information and Quantum Optics and Deparment of Physics Fuzhou UniversitFuzhou 350116China Donostia International Physics Center Manuel de Lardizabal San Sebastian 20018Spain Centro de Fisica de Materiales Centro Mixto CSIC-UPVEHUSan Sebastian 20018Spain Key Laboratory of Material Physics Ministry of EducationSchool of Physics and MicroelectronicsZhengzhou UniversinyZhengzhou 450052China Center for Quantum Information Institute for Interdisciplinary Information SciencesTsinghua UniversityBeijing 100084China Center for Quantum Technology Research and Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurements(MOE) School of PhysicsBejing Institute of Technology.Bejing 100081China

A quantum network is a promising quantum many-body system because of its tailored geometry and controllable interaction. Here,we propose an external control scheme for the qubit-photon interaction and multiqubit reset in a dissipative quantum network,which comprises superconducting circuit chains with microwave drives and filter-filter couplings. The traditional multiqubit reset of the quantum network requires physically disconnected qubits to prevent their entanglement. However, we use an original effect of dissipation, i.e., consuming the entanglement generated by qubits’ interaction, to achieve an external control of the multiqubit reset in an always-connected superconducting circuit. The reset time is independent of the number of qubits in the quantum network. Our proposal can tolerate considerable fluctuations in the system parameters and can be applicable to higherdimensional quantum networks.

关键词： quantum computation quantum reservior engineering quantum network

Isoentropic and Isoenthalpic Temperatures of Protein Unfolding in Hydrophobic Interaction Chromatography

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2006年第1期17卷 105-108页

作者： Yah YAN Rui xian LIU Yin Mao WEI Ye Hua shen Xin Du GENG Institute of Modern Separation Science Northwest University Xi＇an 710069 Contemporary Educational Technology Center Northwest University Xi＇an 710069

The thermal behaviors of five proteins in hydrophobic interaction chromatography （HIC） were investigated in the temperature range from 0 to 50℃. The thermodynamic parameters （△H°,△S°, △Cp°and △G°） of these proteins in the process of retention and unfolding were determined. The existence of enthalpy and entropy convergence with temperature was confirmed. The differences of the isoentropic and isoenthalpic temperatures for protein unfolding in HIC system from the traditional solution were elucidated.

关键词： Column liquid chromatography hydrophobic interaction chromatography protein unfolding thermodynamic convergence.

Highly Efficient and Thermal Robust Cobalt Complexes for 1,3-Butadiene Polymerization

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Polymer Science 2022年第11期40卷 1369-1379页

作者： Liang Fang Wen-Peng Zhao Chun-Yu Zhang Xue-Quan Zhang xian-De shen Heng Liu Toyoji Kakuchi Research Center for Polymer Materials School of Materials Science and EngineeringChangchun University of Science and TechnologyJilin130022China Key Laboratory of Rubber-Plastics Ministry of Education/Shandong Provincial Key Laboratory of Rubber-PlasticsQingdao University of Science&TechnologyQingdao266061China Division of Applied Chemistry Faculty of EngineeringHokkaido UniversitySapporoHokkaido060-8628Japan

A family of highly bulky bis(salicylaldiminate)Co(Ⅱ)complexes bearing cavity-like conformations are disclosed *** to their unique bulky nature around the cobalt atoms that are reflected from space-filling models and the buried volume percentages,obviously longer bond distances of Co―N and Co―O are revealed from those ***,because of these well-protected active species,the cobalt complexes are able to catalyze 1,3-butadiene polymerization in high yields at extreme low catalyst concentrations,revealing a ultra high catalytic *** a ratio of 50000,all the complexes can afford polybutadiene with yields higher than 90%.Furthermore,the highly steric bulkiness of the ligand can also significantly enhance the thermostability of the active *** temperature of 80-120°C,the complexes are able to successfully maintain high activities,giving polymer yields up to 90%.

关键词： Butadiene polymerization Bis(salicylaldiminate)Co(Ⅱ)complexes Ultra high catalytic efficiency

Interdiffusion behavior between Cr and Zr and its effect on the microcracking behavior in the Cr-coated Zr-4 alloy

在线全文

学校读者我要写书评

暂无评论

Nuclear Science and Techniques 2021年第12期32卷 1-12页

作者： Ji-shen Jiang Dong-Qing Wang Ming-Yue Du xian-Feng Ma Chen-Xue Wang Xiu-Jie He Sino-French Institute of Nuclear Engineering and Technology Sun Yat-Sen UniversityZhuhai 519082China

High-temperature chromium(Cr)-zirconium(Zr)interdiffusion commonly occurs in Cr-coated zircaloys applied for enhanced accident-tolerant fuel(ATF)clad*** interdiffusion changes the interfacial microstructure and thus the fracture mechanism of the coating under external *** this study,the interdiffusion behavior in a magnetron sputtered Cr coating deposited on a Zr-4 alloy was studied in a vacuum environment at 1160*** addition,the effect of interdiffusion on the microcracking behavior of the Cr coating was determined by in situ three-point bending *** experimental results show that the interdiffusion behavior resulted in the formation of a ZrCr2 layer,accompanied by the consumption of Cr coating and interfacial *** growth of the diffusion layer followed a nearly parabolic law with respect to annealing time,and the residual stress of the annealed coating decreased with increasing annealing *** external loading,a large number of cracks were generated in the brittle interlayer,and some interfacial cracks were formed and grew at the ZrCr2/Zr-4 *** the remarkable microcracks in the ZrCr2 layer,the vacuum-annealed Cr coating has significantly fewer cracks than the original coating,mainly because of the recrystallization of the coating during annealing.

关键词： Accident-tolerant fuel Surface coating Interdiffusion Three-point bending test Crack propagation

Pd-catalyzed sequential reaction for the synthesis of fused tricyclic compounds containing a dihydrofuran or isobenzofuranone unit

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2009年第2期20卷 165-167页

作者： Ru Wei shen Shu Gao Zhu Qin Qin Xia Lu Ling Wu xian Huang Department of Chemistry Zhejiang University (Campus Xixi) Hangzhou 310028 China State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic Chemistry Chinese Academy of Sciences Shanghai 200032 China

A novel Pd-catalyzed sequential reaction for the synthesis of fused tricyclic compounds with a dihydrofuran or isobenzofuranone unit was developed.

关键词： Pd-catalyzed Sequential reaction Dihydrofuran Isobenzofuranone

Quality control of the agricultural products supply chain based on"Internet+"

在线全文

学校读者我要写书评

暂无评论

Information Processing in Agriculture 2018年第3期5卷 394-400页

作者： Qiang shen Jian Zhang Yun-xian Hou Jia-hui Yu Jin-you Hu College of Urban&Rural Development Beijing University of AgricultureBeijing 102206China School of Economics and Management Beijing Information Science&Technology University100192China College of Economics&Management Beijing University of AgricultureBeijing 100083China College of Economics&Management Beijing University of AgricultureBeijing 102206China College of Engineering China Agriculture UniversityBeijing 100083China

This paper describes a quality-control supply-chain model using the"Internet+"*** model is based on principal-agent theory,which considers the reputational loss due to inferior products and external responsibility *** model analysis and simulation verification,the results show that the optimal quality-control level and market price of agricultural products can be achieved in the agricultural supply chain based on"Internet+"if and only if the information platform’s claim to the agricultural producer is less than the agricultural producer’s claim to the delivery service ***,a rise in consumers’claims or the agricultural producer’s reputational loss due to inferior products will motivate the quality control of an agricultural ***,the market price of agricultural products will also increase with enhanced quality control *** quality-control level of a delivery service provider is inversely proportional to the information platform or its own reputational ***,the key to promoting quality control along the supply chain is to strengthen the responsibility confirmation of an inferior product between the agricultural producer and the delivery service provider.

关键词： "Internet+" Agricultural products supply chain Quality control Reputation loss

Heat treatment effect on structural evolution and hydrogen sorption properties of Y_(0.5)La_(0.2)Mg_(0.3-x)Ni_(2) compound

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

Rare Metals 2023年第6期42卷 1813-1820页

作者： Hao shen Li-Jun Jiang Ping Li Hui-Ping Yuan Zhi-Nian Li Jun-xian Zhang National Engineering Research Center of Nonferrous Metals Materials and Products for New Energy GRINM Group Co.Ltd.Beijing100088China Institute for Advanced Materials and Technology University of Science and TechnologyBeijing100083China CNRS ICMPEUMR 7182Univ Paris Est CreteilThiais94320France GRIMAT Engineering Institute Co. Ltd.Beijing101407China

The effect of heat treatment on phase occurrence,crystal structures and hydrogen sorption properties of Y_(0.5)La_(0.2)Mg_(0.3-x)Ni_(2) compounds has been *** targeted compounds were synthesized through induction melting and processed heat treatment at 700 and 900℃,*** occurrence and structural properties were studied by X-ray powder diffraction(XRD).The global compositions and phase compositions have been determined by inductively coupled plasma-optical emission spectrometer(ICP-AES) and electron probe microanalysis(EPMA) respectively.

关键词： hydrogen treatment structural