DCMT活动光栅控制系统

ＤＣＭＴ活动光栅的控制系统是主测微器的主要部分，本控制系统操作灵活，它既能联机工作又能脱机工作，并具有自动报警和自动复位功能。主测微器承担测定天体和５个自准直像的位置，要比传统的活动光栅复杂得多．本设计的独特之处在于用分区、分时并配以光栏控制诸方法确定全部像的位置。保证了所有的观测在同一个系统之内．经一年来的实际观测证明，本系统精度优于０”．０３，达到了同类别微器的先进水平．     

Determination of copper complexation in surface microlayer of Daya Bay and Jiaozhou Bay

1 INTRODUCTION Bioavailability to the biota and the biogeo-chemistry of trace metals in marine environment areaffected by their chemical speciation in the naturalsystem (Bruland et al., 1991; Van den Berg andDonat, 1992; Wells et al., 1998). Therefore, thesetwo parameters, the ligands concentrations andconditional stability constants, are important todetermine the complexing capacity. Sea surface microlayer (SML), the thin interfa-cial boundary between ocean and atmosphere, playsan imp…     

海产单胞藻液中尖鼻虫和游捕虫的杀灭研究

本文研究结果表明:1)采用降低藻液pH值至3.0的办法可以杀灭金藻液和扁藻液中的尖鼻虫及(?)它二类原生动物鞭毛虫类。经NaOH中和后,绝大部分的藻细胞均能复正常的生长和繁殖。2)采用降低pH值至3.0和提高盐度至50—60‰相结合的办法可以杀灭扁藻液中的游捕虫。经NaOH中和并降低盐度后,扁藻仍能恢复正常的生长和繁殖。     

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????????????????????Burgers????????????????????????α? ??????????:??Burgers????????????????????????????????????????????????????????????????????????????? ???????????Burgers??????????????????Maxwell???Kelvin??????????????????α?????Э??????     

Discovery of double-peaking potassic volcanic rocks in Langshan Group of the Tanyaokou hydrothermal-sedimentary deposit,Inner Mongolia,and its indicating significance

Since the mid-1980s,Tanyaokou large Zn-Cu-Fe sulfides deposit,located at the southwest end of Langshan-Zhaertaishan-Bayan Obo Mesoproterozoic metallogenic belt in the west section of the northern margin of the North China Platform[1?9](Fig.1),has been confirmed to be submarine volcanic exhalative-sedimentary metamorphosed deposit hosted in the miogeosynclinal mud-carbonaceous formation of the Langshan Group(LG)[1],or submarine volcanic exha-lative-deposition-altered deposit[2]or stratabo…     

Equation of state of the H2O, CO2, and H2O-CO2 systems up to 10 GPa and 2573.15 K: Molecular dynamics simulations with ab initio potential surface

Based on our previous development of the molecular interaction potential for pure H₂O and CO₂ [Zhang, Z.G., Duan, Z.H. 2005a. Isothermal-isobaric molecular dynamics simulations of the PVT properties of water over wide range of temperatures and pressures. Phys. Earth Planet Interiors149, 335-354; Zhang, Z.G., Duan, Z.H. 2005b. An optimized molecular potential for carbon dioxide. J. Chem. Phys.122, 214507] and the ab initio potential surface across CO₂-H₂O molecules constructed in this study, we carried out more than one thousand molecular dynamics simulations of the PVTx properties of the CO₂-H₂O mixtures in the temperature-pressure range from 673.15 to 2573.15 K up to 10.0 GPa. Comparison with extensive experimental PVTx data indicates that the simulated results generally agree with experimental data within 2% in density, equivalent to experimental uncertainty. Even the data under the highest experimental temperature-pressure conditions (up to 1673 K and 1.94 GPa) are well predicted with the agreement within 1.0% in density, indicating that the high accuracy of the simulation is well retained as the temperature and pressure increase. The consistent and stable predictability of the simulation from low to high temperature-pressure and the fact that the molecular dynamics simulation resort to no experimental data but to ab initio molecular potential makes us convinced that the simulation results should be reliable up to at least 2573 K and 10 GPa with errors less than 2% in density. In order to integrate all the simulation results of this study and previous studies [Zhang and Duan, 2005a, 2005b] and the experimental data for the calculation of volumetric properties (volume, density, and excess volume), heat properties, and chemical properties (fugacity, activity, and possibly supercritical phase separation), an equation of state (EOS) is laboriously developed for the CO₂, H₂O, and CO₂-H₂O systems. This EOS reproduces all the experimental and simulated data covering a wide temperature and pressure range from 673.15 to 2573.15 K and from 0 to 10.0 GPa within experimental or simulation uncertainty.     

利用树轮重建九房山滑坡活动年份

理解地貌过程以及认识过去灾害发生的频率,是自然灾害风险评价的重要任务。树木年轮由于其具有定年准确、连续性强、分辨率高和易于复本等特点,近年来被用到恢复过去灾害发生的时间。随着滑坡、泥石流等山地地质灾害性事件发生频率的增加,地质灾害风险管理和评价受到了越来越多的关注。在样品量足够的前提下,树木年轮方法可以精确地确定滑坡事件发生的年份。以甘肃南部武都区外纳乡的九房山滑坡为研究对象,利用树木年轮分析方法对该滑坡的灾害事件发生的时间进行了初步的研究。结果显示:1.树木年轮样品在1980—1982年,1984—1987年以及1991-1993年都出现了年轮宽度迅速减小或者迅速增加的现象。本研究将1980—1982年,1984—1987年以及1991—1993年定为滑坡活动年份,其中1992年和1993年的滑坡与当地记载的滑坡年份一致。强降水,地震影响以及不合理的灌溉活动都可能导致滑坡的复活,但降雨仍是导致九房山滑坡复活的重要因素。2.树木年轮样品中出现的偏心木和伪轮现象也是对滑坡灾害发生的佐证,说明受到滑坡灾害的影响,树木的生长环境发生了改变。     

基于时空系统统一的北斗与GPS融合定位

我国的北斗卫星导航定位系统目前已经发射9颗“北斗”卫星,北斗区域卫星导航系统的基本系统已建设完成,正开展星地联调和测试评估工作,已经具备我国范围内的初步三维定位导航能力。本文研究了Beidou和GPS的时间系统/坐标系统的统一、卫星广播星历与卫星位置计算,以及二者的高精度定位算法,并实现了Beidou和GPS载波相位的数据融合和高精度联合定位,最后通过2011年9月29日的实测数据和处理结果证明了本文方法的正确性,同时为北斗二号系统的调试提供相关试验与结果。     

“天绘一号”卫星在轨性能评估

“天绘一号”卫星是中国新一代传输型摄影测量卫星, 由航天东方红卫星有限公司基于CAST2000小卫星平台研制。01星于2010年8月发射成功, 02星于2012年5月发射成功。经过在轨测试, 两颗卫星性能指标均达到设计要求。本文介绍了“天绘一号”卫星在轨性能测试的结果, 为该卫星后续业务化应用提供宝贵数据。