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Sm-Nd Geochronology,REE and C and O Isotope Study of Calcites and Stibnites from Banian Antimony Deposit

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矿物学报 2011年第S1期31卷 642-642页

作者： WANG Jia-sheng1,2,WEN Han-jie2,FAN Hai-feng2,ZHU Jing-jing1,2,ZHANG Jin-rang1,2(1.State Key Laboratory of Ore Deposit Geochemistry,Institute of Geochemistry,chinese academy of sciences,Guiyang 550002,china 2.graduate school of chinese academy of science,beijing,100039,china)

The Banian sediment-hosted antimony deposit is a medium-scale deposit located in the Dushan County,South Guizhou,*** as the dominant gangue mineral can be divided into two types: white and pink,the later is more intim... 详细信息

关键词： REE Sm-Nd Geochronology,REE and C and O Isotope Study of Calcites and Stibnites from Banian Antimony Deposit Nd

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水性聚氨酯包膜肥料的研制与释放性质评价

土壤通报 2009年第4期40卷 829-832页

作者：王亮石元亮于阁杰中国科学院沈阳应用生态研究所辽宁沈阳110016 中国科学院研究生院北京100039

以N、K复合肥为包膜肥料核心,用水性聚氨酯为包膜剂,石蜡为封闭剂,用转鼓包衣工艺制备包膜肥料,并采用水培法和土柱淋溶法对其进行缓控释性能评价。试验结果表明,水性聚氨酯材料应用于肥料包膜具有一定的可行性,其用量在6%时效果最好,... 详细信息

以N、K复合肥为包膜肥料核心,用水性聚氨酯为包膜剂,石蜡为封闭剂,用转鼓包衣工艺制备包膜肥料,并采用水培法和土柱淋溶法对其进行缓控释性能评价。试验结果表明,水性聚氨酯材料应用于肥料包膜具有一定的可行性,其用量在6%时效果最好,封闭剂用量在3%左右时为佳。

关键词：水性聚氨酯肥料包膜喷涂法

四川达曲河流域泥石流沟发育阶段的面积—高程分析

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山地学报 2005年第3期23卷 336-341页

作者：吕学军刘希林苏鹏程中国科学院水利部成都山地灾害与环境研究所中国科学院水利部成都山地灾害与环境研究所四川成都00412中国科学院研究生院北京100039 四川成都

运用Stanler面积-高程分析方法,以四川达曲河流域为对象,对泥石流沟发育阶段进行了定量化研究。根据分析结果,按照Stanler理论的划分标准,初步判定了各泥石流沟发育阶段。结果表明,达曲河流域泥石流沟大多发育在幼年期和壮年期阶段。这... 详细信息

运用Stanler面积-高程分析方法,以四川达曲河流域为对象,对泥石流沟发育阶段进行了定量化研究。根据分析结果,按照Stanler理论的划分标准,初步判定了各泥石流沟发育阶段。结果表明,达曲河流域泥石流沟大多发育在幼年期和壮年期阶段。这一结论对该区泥石流灾害防治和预测预报具有重要意义。

关键词：达曲泥石流面积-高程分析方法发育阶段

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模糊PID技术在热板焊接机中的应用

武汉理工大学学报 2008年第7期30卷 158-161页

作者：王英男邢忠宝苏宛新中国科学院长春光学精密机械与物理研究所

通过对热板焊接机的执行机构永磁同步电动机的数学模型分析,确立了基于转子磁场定向的控制策略和模糊自整定PID的控制方法。应用模糊控制理论,对系统所处的不同状态实现PID参数的在线整定。结果表明,采用模糊自整定PID控制器后,在控制... 详细信息

通过对热板焊接机的执行机构永磁同步电动机的数学模型分析,确立了基于转子磁场定向的控制策略和模糊自整定PID的控制方法。应用模糊控制理论,对系统所处的不同状态实现PID参数的在线整定。结果表明,采用模糊自整定PID控制器后,在控制非线性和时变对象时,控制效果优于PID控制器,可满足热板焊接机的控制需求。

关键词：自动控制技术永磁同步电动机模糊PID控制热板焊接机

Effects of cosmological constant on motion of UHECR particles

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science china(Physics,Mechanics & Astronomy) 2005年第1期48卷 44-56页

作者： CHEN Shaoxia & CHANG Zhe Institute of High Energy Physics, chinese academy of sciences, beijing 100039, china graduate school of chinese academy of sciences, beijing 100039, china Institute of High Energy Physics Chinese Academy of Sciences Beijing 100039 China graduate school Chinese Academy of Sciences Beijing 100039 China

Recent astronomical observations manifest that about two-thirds of the whole energy in the Universe is contributed by a small positive cosmological constant A (> 0). Then, an asymptotically de Sitter spacetime is premised naturally. However, physics in the de Sitter spacetime is very different from that in the Minkowski spacetime. As the first step, a covariant formalism of the kinematics in the de Sitter spacetime is presented here. By solving exactly the equations of motion for a field, we obtain the dispersion relation of a free particle. It is noticed that the dispersion relation is dependent on the degree of freedom of angular momentum of the particle. We show the threshold anomaly of the ultra high energy cosmic ray disappears naturally in the framework of the de Sitter kinematics.

关键词： ultrahigh energy cosmic ray, cosmological constant, curved spacetime.

The deep thermal characteristic of continental margin of the northern South china Sea

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chinese science Bulletin 2000年第18期45卷 1717-1722页

作者： ZHANG Jian & WANG Jiyang1. graduate school, University of science and Technology of china, chinese academy of sciences, beijing 100039, china 2. Institute of Geology, chinese academy of sciences, beijing 100029, china graduate school University of Science and Technology of China Chinese Academy of Sciences Beijing China Institute of Geology Chinese Academy of Sciences Beijing China

Heat flow plays an important role in the study ot thermal structure and thermal evolutionof continental margin of the northern South china Sea. The analysis of heat flow value shows that margin heat flow in the northern South china Sea is relatively high setting, but the percentage of crustal heat flow is lower than 35% in terrestrial heat flow. The terrestrial heat flow exhibited a current of rise from the Northern Continental Margin to the Southern Central Basin. However, the proportion of crustal heat flow in terrestrial heat flow slowly dropped down in the same direction. It is suggested that the main factor causing high heat flow setting is the moving up of hot material from asthenosphere.

关键词： margin of northern South china Sea terrestrial heat flow thermal structures.

Recent advances in the data analysis method of functional magnetic resonance imaging and its applications in neuroimaging

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Progress in Natural science:Materials International 2006年第8期16卷 785-795页

作者： TIAN Jie, YANG Lei and HU Jin (Institute of Automation, chinese academy of sciences, beijing 100080, china graduate school of chinese academy of sciences, beijing 100039, china) [a]chinese academy of sciences Institute of Automation Beijing China [b]graduate school of chinese academy of sciences Beijing China

Functional magnetic resonance imaging (fMRI) has opened a new area to explore the human brain. The fMRI can reveal the deep insights of spatial and temporal changes underlying a broad range of brain function, such as motor, vision, memory and emotion, all of which are helpful in the clinical investigation. In this paper, we introduce some recent-developed algorithms for fMRI signal detection such as model-driven method (general linear model, deconvolution model, non-linear model, etc. ) and data-driven method (principle component analysis, independent component analysis, self-organization mapping, clustered constrained non-negative matrix factorization, etc. ). We also propose several important applications of neuroimaging and point out their shortcomings and future perspectives.

关键词： fMR1 data analysis neuroimaging.

A novel operation mode for spaceborne polarimetric SAR

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science china(Information sciences) 2011年第4期54卷 884-897页

作者： QI WeiKong 1,2 & YU WeiDong 1 1 Institute of Electronics,chinese academy of sciences,beijing 100190,china 2.graduate school of chinese academy of sciences,beijing 100039,china 1. Institute of Electronics Chinese Academy of Sciences Beijing 100190 China2. Graduate School of Chinese Academy of Sciences Beijing 100039 China

A novel operation mode for spaceborne polarimetric SAR,named polarization space-division adding polarization code-division (PSD-PCD) operation mode,is proposed in this paper through combining polarimetric SAR with elevation digital beam-forming (DBF) on *** a pulse repetition interval the up-chirp LFM sub-pulse is transmitted with horizontal polarization antenna,and with some delay the down-chip LFM subpulse is transmitted with vertical polarization antenna to realize code *** every sub-aperture receives returns from ground,SAR system uses range DBF to separate echoes relative to different sub-pulses in order to realize space *** system PRF is equal to that of single-polarization SAR,and elevation DBF help reduce range ambiguity ***,the main system parameters,including PRF,delay between two sub-pulses,radar equation and ambiguity are analyzed and compared with those of single-polarization *** results demonstrate the feasibility and validity of PSD-PCD operation mode.

关键词： spaceborne synthetic aperture radar (SAR) polarimetry digital beamforming (DBF) operation mode ambiguity ratio polarization space-division polarization code-division

Bio-regeneration of p-complexation desulfurization adsorbents

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science china Chemistry 2005年第6期48卷 538-544页

作者： LI Wangliang1,2, XING Jianmin1, XIONG Xiaochao1,2, SHAN Guobin1,2 & LIU Huizhou1 1. Laboratory of Separation science and Engineering, Institute of Process Engineering, chinese academy of sciences, beijing 100080, china 2. graduate school of the chinese academy of sciences,beijing 100039, china 1. Laboratory of Separation science and Engineering Institute of Process Engineering Chinese Academy of Sciences 100080 Beijing China 2. graduate school of the chinese academy of sciences 100039 Beijing China

The coupling of adsorption desulfurization and biodesulfurization is a new approach to produce clean fuels. Sulfur compounds are firstly adsorbed on adsorbents, and then the ad-sorbents are regenerated by microbial conversion. p-Complexation adsorbent, Cu(I)-Y, was ob-tained by ion exchanging Y-type zeolite with Cu2+ and then by auto-reduction in helium at 450℃ for 3 h. Dibenzothiophene (DBT) was used as a model compound. The effects of cell concentra-tion, volume of oil phase, the ratio of aqueous phase to adsorbent on DBT desorption by a bac-terium were studied. The amounts of DBT desorbed and 2-HBP produced can be apparently increased with addition of n-octane. BDS activity can be improved by increasing cell concentra-tion and the ratio of water-to-adsorbent. 89% of DBT desorbed from the adsorbents can be converted to 2-HBP within 6 h and almost 100% within 24 h, when the volume ratio of oil-to-water was 1/5 mL/mL, the cell concentration was 60 g·L?1, and the ratio of adsorbent-to-oil was 0.03 g·mL?1. The amount of 2-HBP produced was strongly dependent on the volume ratio of oil-to- water, cell concentration and amount of adsorbent. Adsorption capacity of the regenerated ad-sorbent is 95% that of the fresh one after being desorbed with Pseudomonas delafieldii R-8, washed with n-octane, dried at 100℃ for 24 h and auto-reduced in He.

关键词： adsorption desulfurization p-complexation adsorbents bio-regeneration Pseudomonas delafieldii desorption.