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Science china Earth Sciences 2004年第8期47卷 739-748页

作者： wu Qiang1 & XU Hua2 1. department of resource exploitation engineering, china University of Mining and Technology, Beijing 100083, china 2. Beijing Institute of Petrochemical Technology, Beijing 102617, china 1. department of resource exploitation engineering China University of Mining and Technology 100083 Beijing China 2. Beijing Institute of Petrochemical Technology 102617 Beijing China

The technology of 3D geological modeling will bring about great changes in the methods of geological data acquiring, storing, processing and displaying. However, no perfect or convenient software systems have been developed up to now since the geologic data which re-flect geological entities bear the feature of diversity, uncertainty and complexity. Some supervoxel models, mathematical models of fault and geometrical models of fold have been contrived so as to show the space geometric configuration of the complicated geologic structures. The application-oriented system architecture for 3D geological modeling is established; and a novel design concept based on spatial data processing is also proposed with the technology of solid modeling as its core and the application of models as its objective. Theories and methods for 3D geological modeling will hopefully be enriched and developed. In the light of these theories and methods, a feature-based navigation visualization technique is also put forward in the paper. By integrating geo-database, graphics libraries and KBS with 3D dynamic simulation systems, geologists will be able to capture the partial characteristics and whole structure embodied in the geological data in a direct-viewing, figurative and accurate manner.

关键词： 3D geological modeling,geometrical model,system architecture,visualization

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综放开采顶煤瓦斯渗透性研究

湘潭矿业学院学报 2002年第4期17卷 1-4页

作者：程国明吴健王思敬中国科学院地质与地球物理研究所北京100029 中国矿业大学资源系北京100083

综放开采由于采高的加大,导致采场前方顶煤中瓦斯渗透性与分层开采有较大的差异.针对目前综放开采瓦斯渗透性理论存在的问题,在有关研究的基础上,结合综放开采的实际,通过引入等效弹模、裂隙不均匀系数及有效应力对已有岩体渗透系数表... 详细信息

综放开采由于采高的加大,导致采场前方顶煤中瓦斯渗透性与分层开采有较大的差异.针对目前综放开采瓦斯渗透性理论存在的问题,在有关研究的基础上,结合综放开采的实际,通过引入等效弹模、裂隙不均匀系数及有效应力对已有岩体渗透系数表达式进行修正,从而给出综放开采采场前方顶煤中瓦斯渗透系数的数学表达式,并给出现场计算实例.图1,参14.

关键词：综放开采裂隙渗透系数有效应力损伤力学采高瓦斯

西北干旱区SG-SPAC系统水力模型的建立

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水文地质工程地质 2002年第4期29卷 62-64,75页

作者：武强张志忠董东林中国矿业大学资源开发工程系北京100083

文章论述了西北干旱区水资源的特点 ,利用现代农田水分研究方法研究了干旱区地表水、地下水、土壤、植物、大气连续体 (SG SPAC)系统的水分转化规律 ,建立了地表水、地下水和土壤水之间的水力耦合模型 ,为干旱区的水资源规划、开发和生... 详细信息

文章论述了西北干旱区水资源的特点 ,利用现代农田水分研究方法研究了干旱区地表水、地下水、土壤、植物、大气连续体 (SG SPAC)系统的水分转化规律 ,建立了地表水、地下水和土壤水之间的水力耦合模型 ,为干旱区的水资源规划、开发和生态环境保护奠定了科学的基础。

关键词：干旱区 SG-SPAC系统水力耦合模型生态环境西北地区地表水地下水土壤植物

Optimal distributed resource allocation in a wireless sensor network for control systems

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Journal of Zhejiang University-Science A(Applied Physics & engineering) 2007年第1期8卷 106-112页

作者： MAO jian-lin wu Zhi-ming department of Automation Shanghai Jiao Tong University Shanghai 200240 China School of Information engineering and Automation Kunming University of Science and Technology Kunming 650093 China

Wireless technology is applied increasingly in networked control systems. A new form of wireless network called wireless sensor network can bring control systems some advantages, such as flexibility and feasibility of network deployment at low costs, while it also raises some new challenges. First, the communication resources shared by all the control loops are limited. Second, the wireless and multi-hop character of sensor network makes the resources scheduling more difficult. Thus, how to effectively allocate the limited communication resources for those control loops is an important problem. In this paper, this problem is formulated as an optimal sampling frequency assignment problem, where the objective function is to maximize the utility of control systems, subject to channel capacity constraints. Then an iterative distributed algorithm based on local buffer information is proposed. Finally, the simulation results show that the proposed algorithm can effectively allocate the limited communication resource in a distributed way. It can achieve the optimal quality of the control system and adapt to the network load changes.

关键词： Wireless sensor networks (WSN) Distributed resource allocation Control systems Optimization.

In situ preparation of Ag@AgCl/Bio-veins composites and their photocatalytic activity and recyclability

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Frontiers of Chemical Science and engineering 2023年第7期17卷 906-917页

作者： Min Zou Chao Tan Zhengqiu Yuan Ming wu jian jian Lei Zhang Yan Zhang Zhou Ma Hu Zhou School of resource&Environment and Safety engineering Hunan University of Science and TechnologyXiangtan 411201China Key Laboratory of Theoretical Organic Chemistry and Functional Molecules Ministry of EducationFunctional Film Materials Engineering Research Center of Hunan ProvinceHunan Provincial Key Laboratory of Advanced Materials for New Energy Storage and ConversionSchool of Chemistry and Chemical EngineeringHunan University of Science and TechnologyXiangtan 411201China School of Information and Electrical engineering Hunan University of Science and TechnologyXiangtan 411201China

The industrial application of nano-photocatalysts in wastewater treatment has been severely restricted for a long time due to their difficult separation,poor reusability,and low *** this work,a facile strategy was proposed to enhance the photocatalytic activity and recovery performance of Ag@AgCl *** veins(Bio-veins)with a unique 3D porous construction were used as carriers for the in-situ growth of Ag@AgCl *** electron microscopy results showed that the Ag@AgCl nanoparticles were uniformly loaded on the surface and interior of the Bio-veins,and the size of the Ag@AgCl nanoparticles immobilized on the Bio-veins(50–300 nm)was significantly smaller than Ag@AgCl obtained by the co-precipitation method(1–3μm).The Bio-veins played a vital role in the photocatalysis reaction *** degradation efficiency of the Ag@AgCl/Bio-veins(CI4)was up to 3.50 times as high as pure Ag@***,the composites also exhibited excellent recyclability and stability under both visible and solar *** work provided a suitable strategy for nano-photocatalysts for practical application and may also offer new possibilities for the high-value utilization of biomass materials.

关键词： Ag@AgCl biological veins photocatalytic activity recyclability

Modifying microstructures and tensile properties of Mg-Sm based alloy via extrusion ratio

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Journal of Magnesium and Alloys 2021年第3期9卷 1098-1109页

作者： Kai Guan Rui Ma Jinghuai Zhang Ruizhi wu Qiang Yang jian Meng Key Laboratory of Superlight Material and Surface Technology Ministry of EducationCollege of Material Science and Chemical EngineeringHarbin Engineering UniversityHarbin 150001PR China department of Materials engineering The University of TokyoTokyo 113-8656Japan State Key Laboratory of Rare Earth resource Utilization Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022PR China

Microstructure and tensile properties of a Mg-Sm-Zn-Zr alloy with various extrusion ratios(ERs)of 6.9,10.4 and 17.6 were systematically *** was identified that,greater ER increased dynamic recrystallization(DRX)fraction and coarsened DRX grains,which further suggests weakened basal fiber texture for the studied *** is mainly due to the rising temperature from massive deformation heat when *** a result,greater ER corresponds to a decreased strength but improved ***,transmission electron microscopy(TEM)observations reveal that the dominant intermetallic phase,Mg_(3)Sm,is metastable,and it will transform into Mg_(41)Sm_(5)during extrusion with *** transformation leads to the accumulation of surplus Sm and Zn atoms,which induces the precipitation of Sm Zn_(3)phase at the surface of Mg_(41)Sm_(5)matrix.

关键词： Magnesium alloys Extrusion ratio Microstructure Phase transition Transmission electron microscopy Tensile properties

The Application of Fuzzy Evaluation based on GIS in Tianjin Urban Underground Space resource Appraisal

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地学前缘 2009年第S1期16卷 186-186页

作者： Fang Xu~(1,2),jian Shen~1 1.department of City Geology,Tianjin Institute of Geological Survey,Tianjin 300191,china. 2.Faculty of resource and Safety engineering,china University of Mining and Technology(Beijing),Beijing 100083,china

The exploitation and utilization of the city underground space resource is the important approach of building tri-dimensional and ecological cities, solving the environment,resource,and population crisis and continuing cities *** article, based on the introduction in detail the overview of regional geology,hydrogeologic condition,engineering geology,environmental geology,*** center city of Tianjin,establishes evaluating model of urban underground space resource based on GIS

关键词： geology information system fuzzy evaluation underground space resource appraisal Tianjin

Layer-by-layer assembly of chitosan and carbon nanotube on cotton fabric for strain and temperature sensing

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Journal of Materials Science & Technology 2024年第6期173卷 114-120页

作者： Ye-Xin Zhang Yi-Dong Li An-Ke Du Yuanpeng wu jian-Bing Zeng Chongqing Key Laboratory of Soft-Matter Material Chemistry and Function Manufacturing School of Chemistry and Chemical EngineeringSouthwest UniversityChongqing 400715China Chongqing Academy of Science and Technology Chongqing 401123China School of New Energy and Materials State Key Laboratory of Oil and Gas Reservoir Geology and ExploitationSouthwest Petroleum UniversityChengdu 610500China

Layer-by-layer(LBL)assembly shows great potential in fabrication of flexible conductive cotton fabrics(FCCF)with carbon nanotubes(CNT)as conductive components but is limited because complicated chemical modification of CNT is usually ***,we reported a facile and eco-friendly LBL approach to fabricating FCCF by dipping in chitosan(CS)aqueous solution and poly(sodium 4-styrenesulfonate)(PSS)wrapped CNT aqueous dispersion *** FCCF with electrical conductivity higher than 30 S/m was achieved when 4 layers of CNT were coated on the cotton fabric(CF).The obtained FCCF possessed outstanding mechanical stability with electrical resistivity almost unchanged after exposure to 500 times mechanical abrasion and 500 circles of tape *** FCCF showed excellent strain sensing performance with high sensitivity(with a gauge factor up to 35.1)and a fast response time(70 ms).It can be used as a strain sensor to accurately detect various human deformations such as finger bending and joint *** FCCF could be used as a temperature sensor in that it exhibited stable and reproducible negative temperature sensing behavior in the temperature range of 30-100℃.

关键词： Flexible conductive cotton fabric Layer-by-layer Temperature sensing Strain sensing

ANALYSIS OF MESOSCALE CONVECTIVE SYSTEMS OVER TIBETAN PLATEAU IN SUMMER

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Chinese Geographical Science 2006年第2期16卷 116-121页

作者： GUO Zhong-yang DAI Xiao-yan wu jian-ping LIN Hui Key Laboratory of Geographic Information Science of Ministry of Education East China Normal University Shanghai 200062 P. R. China department of Geography and resource Management ＆ Joint Laboratory for Geolnformation Science the Chinese University of Hong Kong Hong Kong P. R. China

In this paper, Geostationary Meteorological Satellite (GMS) infrared black-body temperature (Tbb) data from June to August 1998 are used to automatically track the activity of Mesoscale Convective System (MCS) over the Tibetan Plateau in china. Consequently, the features of MCS, such as area, intensity, life cycle, activity region and shape, are obtained. High Resolution Limited Area Analysis and Forecasting System (HLAFS) values provided by china National Meteorological Center are used to study the relationships between the MCS trajectories and their environmental physical field values, based on the distribution and trajectories of MCSs over the Tibetan Plateau. Favorable environmental physical field charts of influencing MCS movement out of the Tibetan Plateau in different UTC (Universal Time Coordinate) are developed by using spatial data mining techniques at levels of 400hPa and 500hPa, respectively.

关键词： Tibetan Plateau Mesoscale Convective Systems black-body temperature automatically tracking