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平板高梯度磁选机分选黑钨矿的试验研究

中国钨业 2016年第4期31卷 41-44页

作者：郑永明陈禄政曾剑武郭顺坤刘文博昆明理工大学国土资源工程学院云南昆明650093 昆明高斯特科技有限公司云南昆明650093

磁选是当前分选黑钨矿高效且经济的一种方法。文章介绍一种平板高梯度磁选机,其主要特征是磁场强度高,磁场梯度大,磁力作用强;应用该磁选机,分选黑钨矿和石英组成的混合矿(WO_3品位7.52.),分析主要操作条件对分选指标的影响,并进行可行... 详细信息

磁选是当前分选黑钨矿高效且经济的一种方法。文章介绍一种平板高梯度磁选机,其主要特征是磁场强度高,磁场梯度大,磁力作用强;应用该磁选机,分选黑钨矿和石英组成的混合矿(WO_3品位7.52.),分析主要操作条件对分选指标的影响,并进行可行性分析。结果表明,操作条件最佳时,即漂洗水量8 L/min、皮带转速8 r/min、磁系长度75 cm和磁系倾角8°时,得到黑钨精矿的WO_3品位为39.05%,WO_3回收率为83.2.%,故该种磁选机可以用于分选黑钨矿。

关键词：平板高梯度磁选机黑钨矿分选特性

Characteristics and Photoeatalytie Effects of Zn/ZnO Nanowhiskers Compared with ZnO Nanoparticles

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Journal of Wuhan university of technology(Materials {2.) 2007年第4期22卷 643-648页

作者：刘宏芳 Department of Chemistry Huazhong University of Science and Technology

ZnO nanopowders were prepared by oxidizing Zn vapor in the atmosphere of mixture gas of At and O2.at low pressure. Tetrapod nanowhiskers synthesized at a pressure of 1.6 kPa show pure ZnO feet and Zn phase in the core of the nanopowder. The ellipsoid ZnO nanoparticles were produced at the pressure of 10 kPa. The photodegradation rate of aniline and chemical oxygen demand removal demonstrate that the photocatalytic efficiency of Zn/ZnO nanowhiskers with UV irradiation is higher than that ofZnO nanoparticles. The tetrapod morphology and Zn phase inside nanowhiskers play key a role in photodegradation process.

关键词： photocatalysis Zn/ZnO nanowhiskers ZnO nanoparticles catalyst aniline

The application of geographic information technology to coastal geomorphology

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Acta Oceanologica Sinica 2009年第5期28卷 49-57页

作者： GUO Wei LI Shuheng ZHU Dakui School of Human Settlements and Civil engineering Xi＇an Jiaotong University Xi＇an 710049 China Department of Computer sciences Xi＇an Jiaotong University Xi＇an 710049 China Department of Urban and resources sciences Northwest University Xi＇an 710032 China faculty of Environmental sciences University of Waterloo Waterloo N2L3G1 Canada Key Laboratory of Coast ＆ Island Development of Ministry of Education Nanjing University Nanjing 210093 China

With the development of modern oceanic observation technologies, coastal survey data have been experiencing a substantial growth. The integration management of the data from different disciplines, different sources and different formats has become a major research field in coastal geomorphology by using Geographic Information System （GIS）. This paper puts forward a new methodology framework of GIS techniques in coastal ocean geomorphology, including data acquisition, process, analysis, and representation. It focuses on some major GIS techniques to study the land-ocean interaction mechanism, such as spatial analysis, submarine topography model and three-dimension （3D） visualization, and apply its result to coastal urban planning, harbor site selection and geomorphology environment about coral reef and islands on the continental shelf. The case studies cover the whole coastal ocean to serve the social community, economical development and diplomatic rights for decision-making all round in the coastal zone. The research shows clearly that the application of coastal multi-source geospatial platform has changed the traditional coastal geomorphology {2. dramatically from its research scope, fields and methods, however, as made clear in this paper, extracting accurate information from remote sensing data and GIS databases for coastal geomorphological applications is a nontrivial challenge that requires the combined knowledge and skills of information scientists and geomorphologists.

关键词： coastal geomorphology geographic information system (GIS) spatial analysis threedimensional visualization

Process and mechanism of arable land change in Hebei Province during the past 50 years

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Journal of Geographical sciences 2001年第4期11卷 47-52页

作者： XU Yue-qing (Institute of Geographical sciences and Natural resources Research, CAS, Beijing 100101,{2. College of resource and Environment science, Hebei Normal university, Shijiazhuang 050016,{2. ) CAS Institute of Geographical Sciences and Natural Resources Research Beijing China (GRID:grid.9227.e) (ISNI:***) Hebei Normal university College of Resource and Environment Science Shijiazhuang China (GRID:grid.256884.5) (ISNI:***)

Hebei Province is one of the regions with most densely population, fastest economic growth and most intensive land use in china. The contradiction of land shortage sharpened by high-speed economic development with population growth has become a serious problem, which has restricted regional sustainable *** paper revealed the basic process, regional differences of change and the gravity center of arable land area according to the long-series statistical data of arable land during the past 50 years. On the basis of the above mentioned, the major driving forces that influence the changes of the arable land are discussed. The research results indicate that there is a trend of obvious fluctuating decrease in arable land area during the last 50 years. The changes of arable land area undergo the process from increase to sharp decrease to gently decrease. The regional disparity of change in arable land area is very notable and the gravity center of arable land area moves to the northeast 49.2. km. Regarding the decrease in arable land, the direct driving forces include adjustments of agricultural structure and reclamation, and indirect driving forces include advance in technology, economic interest and population growth etc.

关键词： decrease in arable land area changing process mechanism Hebei Province

A reservoir skeleton-based multiple point geostatistics method

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science china Earth sciences 2009年第S1期52卷 171-178页

作者： YIN YanShu1,WU ShengHe2.ZHANG ChangMin1,LI ShaoHua1 & YIN TaiJu1 1 faculty of Geosciences,Yangtze {2.,Jingzhou 43402.,china 2.faculty of resource and Information,china {2. of Petroleum,Beijing 102.49,china 1. faculty of Geosciences Yangtze University Jingzhou 434023 China 2. faculty of resource and Information China University of Petroleum Beijing 102249 China

Traditional stochastic reservoir modeling,including object-based and pixel-based methods,cannot solve the problem of reproducing continuous and curvilinear reservoir objects. The paper first dives into the various stochastic modeling methods and extracts their merits,then proposes the skeleton-based multiple point geostatistics(SMPS) for the fluvial reservoir. The core idea is using the skeletons of reservoir objects to restrict the selection of data patterns. The skeleton-based multiple point geostatistics consists of two steps. First,predicting the channel skeleton(namely,channel centerline) by using the method in object-based modeling. The paper proposes a new method of search window to predict the skeleton. Then forecasting the distributions of reservoir objects using multiple point geostatistics with the restriction of channel skeleton. By the restriction of channel centerline,the selection of data events will be more reasonable and the realization will be achieved more really. The checks by the conceptual model and the real reservoir show that SMPS is much better than Sisim(sequential indicator simulation) ,Snesim(Single Normal Equation Simulation) and Simpat(simulation with patterns) in building the fluvial reservoir model. This new method will contribute to both the theoretical research of stochastic modeling and the oilfield developments of constructing highly precise reservoir geological models.

关键词： reservoir skeleton multiple point geostatistics restriction Simpat(simulation with patterns) fluvial reservoir geological model

An Analysis of Suburban Agricultural land Allocation System and Sustainable Development Strategy──Taking Kaifeng Suburban as an example

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Journal of Systems science and Systems engineering 2001年第4期13卷 409-417页

作者： QIN Ming-zhou1, ZHAO Shu-mao2.1. College of Environment and Planning, Henan university, Kadeng 475001, china 2. Planning Council of Henan Province, Zhengzhou 450003, china College of Environment and Planning Henan UniversityKaifeng 475001 China Planning Council of Henan Province Zhengzhou 450003 China

Based on the system theory, this paper discusses the structure and efficiency of agricuItural land use in Kaifeng Suburban. Such present problems as benefit deviation from resource al1ocation, distinguished unemployment and four kinds of contribution of urban agriculture land use are revealed. Then, in the view of sustainab1e development, some resolution measures to the problems are advanced out. These suggestions include farmland protection, ecological agriculture, sustainable land use and input decrease of synthetic matter.

关键词： suburban agricultural land use resources allocation use efficiency farmland protection ecological agriculture

Nitrate Leaching in an Irrigated Wheat-Maize Rotation Field in the North china Plain

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Pedosphere 2005年第2期15卷 196-203页

作者： ZHANGYu-Ming HUChun-Sheng ZHANGJia-Bao CHENDe-Li LIXiao-Xin InstituteofGeneticandDevelopmentalBiology ChineseAcademyofSciencesShijiazhuang050021（China） InstituteofSoilscience ChineseAcademyofSciencesNanjing210008（China） DepartmentofresourceManagementandHorticulture InstituteofLandandFoodResourcetheUniversityofMelbourneParkville3052Victoria（Australia）

Soil water deep drainage and nitrate (NO-3) leaching losses below the root zone were investigated in a 1 ha wheat-maize rotation field under traditional agricultural management that local farmers generally follow in the North china Plain, using the soil water balance method and NO3-N concentration in suction samples. Water drainage, and NO3-N distribution and leaching losses exhibited pronounced spatial and temporal variability. Soil water deep drainage and NO3-N leaching loss mostly occurred during the sum…

关键词： deep drainage nitrate leaching soil water

Multi-objective Particle Swarm Optimization for land Use Structure

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Multi-objective Particle Swarm Optimization for Land Use Str...

2.10 Second International Conference on Computational Intelligence and Natural Computing (CINC 2.10)

作者： Huang Hai1 2.1. College of resource and Environment Southwest university Chongqing {2. 2. College of River & Ocean Chongqing JiaoTong university Chongqing {2.

Based on the introduction of particle swarm optimization algorithm, this paper applies it to the land use structure optimization. The objective functions, variables and restraint functions are constructed for land use structure optimization. The corresponding software is also developed. And land use structure optimization for HeChuan District of ChongQing City is taken as the example for the case study. The satisfactory optimization result proves that application of the particle swarm optimization algorithm for land use structure is feasible and effective, which supplies a new idea and method.

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冶金用新型炭质反应剂的研究

有色矿冶 2001年第2期17卷 31-33页

作者：陈雯刘中华赵启涛昆明理工大学材料与冶金工程学院云南昆明650093

自然森林的禁伐使木炭的来源受到极大限制。因此必须探索开发新型炭质反应剂———木炭替代品以满足需要。就木炭替代品原料的选择、原料中有害杂质 (主要是硫、铁 )的脱除、原料的炭化与活化等进行了详细的论述 ,并对产品的成分和性能... 详细信息

自然森林的禁伐使木炭的来源受到极大限制。因此必须探索开发新型炭质反应剂———木炭替代品以满足需要。就木炭替代品原料的选择、原料中有害杂质 (主要是硫、铁 )的脱除、原料的炭化与活化等进行了详细的论述 ,并对产品的成分和性能与木炭进行了对比。

关键词：冶金炭质反应剂木炭炼铜还原剂