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Distribution characteristics of seamount cobalt-rich ferromanganese crusts and the determination of the size of areas for exploration and exploitation

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Acta Oceanologica Sinica 2011年第3期30卷 63-75页

作者： HE Gaowen MA Weilin SONG Chengbing YANG Shengxiong ZHU Benduo YAO Huiqiang JIANG Xunxiong CHENG Yongshou Guangzhou Marine Geological Survey Guangzhou 510075 China Second institute of Oceanography State Ocean Administration Hangzhou 310012 China china Ocean mineral resources R ＆ D Association Beijing 100860 China Beijing General Research institute of Mining ＆ Metallurgy Beijing 100070 China National Marine Information Center Tianjin 300171 China

In 2001, the International Seabed Authority （ISBA） initiated the consideration relating to the Regulations for Prospecting and Exploration for Hydrothermal Polymetallic Sulphides and Cobalt-rich Ferromanganese Crusts in the Area at its 7th session. Since then, the consideration of the Regulations has been mainly focused on the size of areas to be allocated for exploration and exploitation of the crusts. This paper, based on the investigation data and the analysis of the distribution characteristics of the crusts, suggests a model for determining the size of areas for exploration and exploitation of the crusts, taking into account various factors such as production scale, crust thickness and grade, mineable area proportion, recovery efficiency, exploration venture, and so on. Through the modeling, the paper suggests that the exploration area （the area covered by each application for approval of a plan of work for exploration of cobalt-rich crusts） shall be 4 856 km2 and the exploitation area （the mine site area） shall be 1 214 km2, for 20 years of 1 million wet tonnes annual production.

关键词： cobalt-rich ferromanganese crusts exploration and exploitation area seamounts regulation on exploration

Effects of femtosecond laser ablation on the surface morphology and microstructure of a bulk TiCuPdZr glass alloy

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Rare Metals 2009年第3期28卷 272-276页

作者： WANG Hongshui LIANG Chunyong CHEN Xueguang WANG Lei YANG Yang YANG Jianjun ZHU Shengli LI Changyi School of Materials Science and Engineering Hebei University of Technology Tianjin 300130 China Key Laboratory of the Ministry of Education of china for Opto-electronic Information Science and Technology Institute of Modem Optics Nankai University Tianjin 300071 China School of Materials Science and Engineering Tianjin University Tianjin 300072 China Stomatological Hospital Tianjin Medical University Tianjin 300070 China

The effects of femtosecond laser ablation on the surface characteristics and microstructure of a bulk TiCuPdZr glass alloy were investigated. The heat influence zone of femtosecond laser ablated with a laser energy of 100 μJ exhibits a ripple-like feather, while a porous structure appears on the surface of the specimen ablated by a 200 μJ femtosecond laser. The contents of Ti, Zr, and Pd on the ablated surface decrease and that of Cu increases with increasing laser energy. The crystallization process occurs on the glass alloy specimens during femtosecond laser ablation, and the crystallinity of a 100 μJ femtosecond laser-ablated specimen is greater than that of a 200 μJ femtosecond laser-ablated one.

关键词： femtosecond laser bulk glass alloy periodicity crystallization

System Analysis Applying to Talent Resource Development Research

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Journal of Systems Science and Systems Engineering 2001年第3期13卷 381-384页

作者： WANG Peng-tao, ZHENG Gang Department of Computer Science, tianjin institute of Technology, tianjin 3.0191, {3. Department of Computer Science Tianjin Institute of Technology Tianjin 300191 China

In the development research of talent resource, the most important of talent resource forecast and optimization is the structure of talent resource, requirement number and talent quality. The article establish factor reconstruction analysis forecast and talent quality model on the method: system reconstruction analysis and ensure most effective factor level in system, which is presented by ***, ***. And performing dynamic analysis of example ration.

关键词： reconstruction analysis requirement number talent quality

Experimental Research on Residual Stress in Surface of Silicon Nitride Ceramic Balls

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厦门大学学报（自然科学版） 2002年第S1期41卷 41-42页

作者： REN Cheng-zu, WANG Tai-yong, JIN Xin-ming, XU Hao (institute of Mechanical Engineering, tianjin University, tianjin 3.0072, {3.)

The influence of the residual stress in surface of ceramic balls on the fatigue life is large, because the life of silicon nitride ball bearings is more sensitive to the load acted on the bearings than the life of all-steel ball bearings. In this paper, the influence of thermal stress produced in sintering and mechanical stress formed in lapping process on residual stress in surface of silicon nitride ceramic balls was discussed. The residual compress stress will be formed in the surface of silicon nitride ceramic balls after sintering. The residual tensile stress will be formed in surface of silicon nitride ceramic balls in lapping process, and the size of abrasive particle is smaller, such trend is stronger. In this paper the residual stress was measured by the xylometric measurement in which the material in surface was peeled with lapping. The distribution of residual stress in surface can be calculated with the variation in specific volume. The technological parameter with which the material was peeled by lapping was given, for minimizing the extra influence of the residual stress forming in peeling on the original residual stress in surface, the abrasive particle size would not be too small and the load impressed would not be too large. Some experimental researches on residual stress in surface of silicon nitride ceramic balls were made. The surface of silicon nitride ceramic balls presented residual compressive stress after sintering and the influence of the ball size on the residual stress is feeble. It is expected that the size of ball blank is same for achieving the same residual compressive stress in surface on balls after final machining. In lapping process, the surface of silicon nitride ceramic balls presented residual tensile stress, the larger the load which is impressed on single ball, the larger the amplitude of residual tensile stress is; the smaller the abrasive particle, the stronger the trend of plastic deformation is and the larger the amplitud

关键词： silicon nitride ceramic balls residual stress xylometric measurement specific volume

On the Parsimony of Some Model-Selection Criteria in Econometric Modeling

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Systems Science and Systems Engineering 1994年第2期4卷 97-103页

作者： ZHANG Wei LIU Bao(institute of System Engineering (ISE), tianjin University,tianjin 3.0072, P.R.{3.)

The preference of a model-selection criterion to simple models can be define as it parsimony. Among the three aspects of the principle of Parsimony Sawyer (1980) expressed. it seems that most studies on this subject are more concerned with the equal-fitting or consistency than with the angmentation rules. In this paper an analytical approach will be developed to check foe compliance of some model-selection criteria with the rules. The most important consequence is the breach of one augmentation rule. Namely. all criteria examined except C2 will make it easier to augment a larger model with a fixed number of variables than to enlarge a smaller model with the same *** C2 is found to be of good quality. It will had the exact model among a set of nested alterntives, choose a smaller one when models of equal-fitting are compared, and follow both augmentation rule 1 and rule 2. The results obtained in this paper are generally consistent with those resulting from Sawyer’s simulation approach, while the analytical way developed by the authors be applied under more general condition.

关键词： parsimony model-selection econometrics.

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舒适性与空调系统能耗研究

天津大学学报（自然科学与工程技术版） 2003年第4期36卷 489-492页

作者：刘斌杨昭朱能蒋薇天津大学热能研究所天津300072 天津大学环境工程学院 300072

分析了热舒适性与空调系统负荷之间的关系,通过调查统计数据研究了温度和相对湿度对人体热舒适性的影响.结果表明,在所统计的人群范围和一定热舒适性温度范围内,改变相对湿度几乎不影响环境热舒适性.同时发现在人体热舒适性范围内,改变... 详细信息

分析了热舒适性与空调系统负荷之间的关系,通过调查统计数据研究了温度和相对湿度对人体热舒适性的影响.结果表明,在所统计的人群范围和一定热舒适性温度范围内,改变相对湿度几乎不影响环境热舒适性.同时发现在人体热舒适性范围内,改变相对湿度将更多地影响空调系统负荷,空调系统的节能和保证舒适的热环境在一定条件下可达到相对统一.

关键词：空调系统能耗热舒适性温度相对湿度建筑节能热环境

A NEW METHOD FOR PBEPARATION OF IBON(Ⅲ) PORPHYRIN OXYANION OMPLEXES -SYNTHESIS OF PERCHLORATE(PORPHYINATO) IRON(Ⅲ)

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Chinese Chemical Letters 1996年第2期7卷 187-188页

作者： Xin Hua ZHONG Yao Yu FENG Jie Sheng HUANG and Pan Wen SHEN(Departemt ot Chemistry. Nankai University, tianjin 3.0071)(institute of Chemical Engineering,tianjin University, tianjin 3.0072) Department of Chemistry Nankai University Tianjin 300071 institute of Chemical Engineering Tianjin University Tianjin 300072

A new method for preparetion of iron(III) porphyrin oxyanion complexes was reported. By this method perchiorate complex of iron(III) tetraphenylporphyrin [FeTPP(OClO3.] was prepared from i-butylamine complex of iron(I...

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保障性住房政府规制利益相关者行为分析

土木工程学报 2011年第S1期44卷 230-233,248页

作者：张宇天津城市建设学院天津300384

政府对保障性住房进行规制涉及到三方主要利益相关者,三方在规制过程中的行为选择直接影响规制目标的实现。首先界定保障性住房政府规制中的利益相关者,分析规制过程中各方的目标差异,通过三者之间多重委托代理关系的阐述,分析利益相关... 详细信息

政府对保障性住房进行规制涉及到三方主要利益相关者,三方在规制过程中的行为选择直接影响规制目标的实现。首先界定保障性住房政府规制中的利益相关者,分析规制过程中各方的目标差异,通过三者之间多重委托代理关系的阐述,分析利益相关者之间的异化博弈关系,从而得出在规制过程中各方的行为选择及政府规制优化的措施。

关键词：保障性住房政府规制利益相关者行为选择

Sediment movement characteristics of coast and analysis of seabed evolution

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Acta Oceanologica Sinica 2011年第5期30卷 101-107页

作者： KONG Lingshuang CAO Zude WANG Wei QI Dingman Shanghai Estuary and Coastal Science Research Center Shanghai 201201 China tianjin Research institute for Water Transport Engineering Ministry of Transport Tianjin 300456 China

The rotary ring flume is used to study the silty sand movement in a periodic alternating *** of sediment movement of different coasts in the tidal current are *** detailed analysis of erosion-sedimentation function in a numerical simulation is *** equilibrium sediment concentration is *** on the equilibrium sediment concentration,the seabed erosion-sedimentation index is derived and the seabed erosion-sedimentation calculation is *** seabed erosion-sedimentation index is used to calculate the seabed evolution of Yangshan sea area and a good agreement with field measurements is obtained.

关键词： sediment movement periodic alternating current sediment numerical simulation equilibrium sediment concentration seabed erosion-sedimentation index