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Stability on the ^(109)Cd,^(65)Zn Complex with Humus Acids

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Agricultural sciences in china 2002年第5期1卷 520-525页

作者： HUA Luo, CHEN Shi-bao, BAI Ling-yu and WEI Dong-pu( Geology Department, Capital Normal University, beijing 10003. , P.R.china Institute for Application of Atomic Energy, {2. {3. of Agricultural sciences , beijing 100094 ,P.R. china ) Geology Department Capital Normal University Beijing 100037 P. R . China Institute for Application of Atomic Energy Chinese Academy of Agricultural Sciences Beijing 100094 P. R. China Institute for Application of Atomic Energy Chinese Academy of Agricultural Sciences Beijing 100094 P. R. China

The radioactive isotope tracer and ion exchange balanced method was used to study the stability of 109Cd, 65 Zn complexes with humus acids. In the 109Cd and 65 Zn single existing system with humic acids, the stability constants of the humic-109Cd(65Zn) complex compound was higher than the fulvic-109 Cd(65Zn) complex compound. The stability constant of the humic (fulvic) -65Zn was higher than that of the humic (ful-vic)-109Cd. In the 109Cd and 65 Zn coexisting system, the stability constant and the co-ordination number of the humic (fulvic)-65Zn complex obviously increased, but the stability constant and the co-ordination number of the humic (fulvic)-109Cd complex obviously decreased as compared with its respectively single existing system . The result showed that the humus matter with higher molecular weight could more effectively reduce plant availability of heavy metals than that with lower molecular weight in polluted soil by heavy metals. The humus matter could more effectively reduce plant availability of Zn than that of Cd. Application of humus-acid increased the harm of Cd and decreased the harm of Zn to plants in Cd-Zn coexisting system.

关键词： Humus acid Complex Cadmium Zinc Stability of complex Isotope tracer technique

Complex behaviour of trivalent rare earth elements by humic acids

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Journal of Environmental sciences 1998年第3期10卷 47-53页

作者： Geng An chaoResearch Institute of Environmental Engineering,Fushun Petroleum Institute,Liaoning 113.01,chinaZhang Shen Institute of Geography,chinese {2. of {3.,beijing 100101,chinaHarald Hфiland Department of Chemistry,Univers

The complexation behaviours of trivalent rare earth elements (La, Ce, Ho and Yb) by two types of humic acids were investigated under a specified set of conditions. Humic acids show quite different complexation capacities an conditional formation constants with the REEs. Apparently there are two types of binding sites in the functional groups of humic acid, in which the first binding sites have stronger ability than the second. Cerium shows the largest complexation capacities and highest formation constants among the four REEs with two humic acids, this anomaly may be relative to the distribution pattern of the REEs in seawater. The experimental results were comparable to the values of other metals reported and provided the basic data for environmental geochemistry of rare earth elements.

关键词： complex behaviour rare earth elements humic acid.

CENOZOIC DISPLACEMENT HISTORY OF THE ALTYN TAGH FAULT:GEOLOGICAL EVIDENCE FROM FIELD OBSERVATIONS IN SOUERKULI AND MANGAR REGIONS, NW china

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地学前缘 2000年第S1期7卷 210-211页

作者： Zhang Yueqiao 1, Chen Zhengle 1, Z.Washburn 2. Wang Xiaofeng 1, J. R.Arrowsmith 2.1 The Institute of Geomechanics, chinese {3. of Geological {2., beijing 100081, china 2.Department of Geology, Arizona State University, Tempe, AZ, 852.7,USA

The ENE\|striking Altyn Tagh Fault (ATF) has been well known as a large, active left\|lateral strike\|slip fault that bounds the thrusting systems in NE *** fault has been the focal point in the debate between the discrete extrusion vs. distributed crustal shortening models. Although its active left\|lateralstrike\|slip features have been largely investigated and well documented by both satellite imagery and air\|photo interpretations and field observations, little study has been done upon its Cenozoic displacement history. Questions about the age of initiation and total offset accumulated on the fault remain controversial. A key area to resolve such question is located along the central segment of the fault in the Souerkuli and Mangar regions, where Neogene sedimentary basins well develop and are mostly distributed in three zones, namely from east to west: the Gobiling, Yitunbulak and Yusuale Tagh (Fig.1). Our field investigations were conducted along the ATF cutting the Yitunbulak and Gebiling Neogene sedimentary basins. Two stratigraphic unconformities observed within this Neogene conglomeratic series allow a separation of three major stratigraphic sequences and record the initiation and major deformational episodes of ATF during Cenozoic. An early stratigraphic unconformity occurred between a yellow depositional series below and early Pliocene red\|colored conglomeratic mudstones above. A later stratigraphic unconformities occurred between early and late Pliocene sedimentary series. The lower series below the early stratigraphic unconformities is mainly composed of a conglomeratic rocks containing cobbles and pebbles of basement rock units (mostly mylonitic granites, limestones and quartzes); this series has been poorly mapped and dated; its age could be assigned to late Oligocene to early Miocene; this series tilts to NW with an angle of about 3.° and is overlain in angular unconformity by early Pliocene pebble\|sized conglomerates. A weathering zone on

关键词： left\|lateral offset Cenozoic Altyn Tagh fault

A MULTI-DIMENSIONAL COMPOSITE MODEL FOR PLASTIC CONTINUA UNDER POLYAXIAL LOADING CONDITION

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Acta Mechanica Sinica 1990年第4期6卷 357-366页

作者： Liang Naigang (Institute of Mechanics,chinese academy of {2.,{3.,100080,P.R.china)Pal G.Bergan (A.S.Veritas Research,P.O.Box 3.0,N-13.2} Hφuik,Oslo,Norway) Institute of Mechanics Chinese Academy of Sciences Beijing P.R. China A. S. Veritas Research Oslo Norway

By replacing a medium with reinforcing components oriented and distributed uniformly in a mul- ti-dimensional space,a constitutive model is *** components are extended/compressed compatibly with the strain and the resultant of load exerted on them to balance the *** load-elongation relation can be determined from a conventional material *** component undergoes different elongation history depending on its own orientation during deformation,so that the model can simulate elasto-plastic behavior of materials un- der polyaxial loading *** incremental constitutive matrix bas been derived for application in numeri- cal analysis and a yield criterion is also introduced.A few subsequent yield surfaces have been predicted and com- pared with experiments.

关键词： plasticity constitutive relationship

Applied research of semiconductor laser on laser encoding and emitting system

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Applied research of semiconductor laser on laser encoding an...

2.07亚洲光电子会议半导体激光器及应用分会场

作者： Yixian Qian *1 2.Xiaowei Cheng 3.Jianjia Zhang 3.1Institute of Optics & Electronics chinese academy of {2. 6102.9 2.aduate school of chinese academy of {2. 10003. 3.6} of opt-electrics engineering Changchun University of Science and Techonology13.02.

Semiconductor laser is paid more attention and widely used in laser range finder, laser fuse and laser guidance due to its monochromaticity, coherence and high density, as well as small volume and low power consumption. The principle of laser encoding and emitting system is set forth. Based on the principle of spatial frequency-encoding, a laser encoding-emitting system is developed;a new laser encoding mode is designed, which can transfer continuous laser into pulse laser with different frequencies, they represent different position. The mathematic model to calculate the deviation from center is obtained. A new encoding pattern is designed, which is composed of two light paths crossed 90°. Azimuth information of target is given in orthogonal coordinate system and deviation from center is linearity. As well as, characteristic distribution of spatial laser field is analyzed and irradiance distribution is homogeneous. Laser diode is directly applied as guidance source and information carrier in place of solid-state laser. Output power of a single laser diode can reach 3.. Two laser diodes are installed in series for increasing output power in the system. Tested in 2.kilometers outdoor;experimental results prove that: the receiver can receive correctly the signal emitted by system. The laser encoding mode can satisfy guidance precision demand.

关键词： semiconductor laser laser encoding modulation disc pattern design

来源： cnki会议评论

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一种快速AP聚类算法

山东大学学报（工学版） 2011年第4期41卷 20-23,28页

作者：刘晓勇付辉中国科学院文献情报中心北京100190 广东技术师范学院计算机科学学院广东广州510665 中国科学院研究生院北京100049

Affinity propagation(AP)聚类算法中的一个重要参数-收敛系数(damping factor)对算法的运行效率有较大影响,而传统的AP算法中收敛系数常作为固定参数在算法运行中保持不变,因此AP算法的收敛性能对收敛系数初始值的选择比较敏感,针对这... 详细信息

Affinity propagation(AP)聚类算法中的一个重要参数-收敛系数(damping factor)对算法的运行效率有较大影响,而传统的AP算法中收敛系数常作为固定参数在算法运行中保持不变,因此AP算法的收敛性能对收敛系数初始值的选择比较敏感,针对这一问题提出了一种新的AP聚类算法:F-AP,该算法在传统AP聚类算法基础上引入收缩因子调节收敛系数,使其值能够随算法进程动态调整,以加速AP算法的收敛过程。在3.不同容量模拟数据集上进行了实验,结果表明,新算法能够有效加速收敛过程,并且能够保证与原算法相同的聚类结果;在标准数据集Iris上的聚类结果也表明了新算法具有较好的收敛性能。

关键词：聚类算法吸引-传播聚类算法收缩因子振荡度

Constraint Analysis and Countermeasures for china's Forestry Scientific and Technological Achievements Transformation

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chinese Forestry Science and Technology 2009年第3期8卷 64-70页

作者： QI Yueqing1 BAO Yingshuang2.1. Research Institute of Forest Ecology, Environment and Protection, chinese academy of Forestry, {2. 100091, P. R. china 2. Research Institute of Forestry Policy and Information, chinese academy of Forestry, {2. 100091, P. R. china

This paper analyzes the constraint factors of forestry scientific and technological achievements transformation and explores the countermeasures and measures to promote the transformation. It points out that to achieve maximum return from investment funds in forestry research, it shall improve the transformation of scientific and technological achievements, enhance independent innovation capability, and greatly enhance the supply capacity of scientific and technological achievements, so as to provide endlessly a reserve of scientific and technological achievements for forestry development.

关键词： achievement transformation constraint

Re-Discussion on Motion of Shanghai VLBI Station Relative to Eurasian Plate From VLBI

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天文研究与技术 1999年第S1期 134-138页

作者： Yang Zhigen, Zhu Wenyao, Xiong Yongqing, Zhang Qiang (Shanghai Astronomical Observatory, The chinese academy of {2., Shanghai 2.003., china) (National Astronomical Observatories, The chinese academy of {2., beijing 100012. china)

By using the results of changing rate of the baseline lengths from Shanghai VLBI station to 13.international VLBI stations, respectively, the vertical and horizontal velocities of Shanghai VLBI station are re estimated by means of the Least Square Fit method based on the international VLBI station velocities of ITRF96, and the Euler vectors of Eurasian tectonic plate of Sillard et al (1998). The results are such the vertical velocity: -1 86±0 84 mm/yr, horizontal velocity and its local azimuth: 14 2.±0 97 mm/yr, E -12. 49±2. 98 S. If the NNR NUVEL 1A model is used instead of the Euler vectors of Sillard et al., the corresponding results are such -1 86±0 84 mm/yr, 10 56±0 96 mm/yr, E -16° 07±4° 06 S. In addition, the corresponding results for the Urumqi VLBI station are also estimated.

关键词： Relative to Eurasian Plate From VLBI Re-Discussion on Motion of Shanghai VLBI Station

Cocrystal Phenomena of DABCO with Phenol Derivatives

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Chemical Research in chinese Universities 1993年第3期9卷 261-263页

作者： GUO Wen-sheng (Department of Chemistry, Liaoning Normal University, Dalian, 11602.)TIAN Zhi-yue, LU Yang and ZHENG Qi-tai (Institute of Meteria Medica, chinese academy of Medical {2., beijing, 100050)

It has been reported that 1,4-diazabicyclo[2.2.2. octane(DABCO) can form complexed crystals with lithium alkals. Our experimental results show that DABCO can also form cocrystals with phenol derivatives such as phenol... 详细信息

关键词： Cocrystal phenomena DABCO Phenol derivatives