载波相位差分技术在馈源舱动态定位中的应用

针对ＦＡＳＴ项目馈源舱扫描跟踪设计,作者根据ＧＰＳ载波相位差分精密动态定位原理,讨论了馈源舱位置和姿态的ＧＰ动态检测系统的组成,按照我国贵州ＫＡＲＳＴ地形的地理位置给出了动态检测时需要使用的馈源舱位姿转换矩阵和求解方程,与ＧＰＳ动态定位系统相结合就可以完成对馈源舱位姿的跟踪检测,实现舱体的闭环控制。     

四川稀土矿（氟碳铈矿）稀土总量的测定方法

氟碳铈矿矿样经高氟酸分解、脱硅后,稀土元素以氢氧化物和草酸盐形成进行沉淀与干扰元素分离,氢氧化物沉淀使稀土与钙、镁分离,草酸盐沉淀,使稀土与铁、铝、锆、钛等元素分离。适应矿石稀土含量１％～７４％的含量测定。该方法用于氟硕铈矿稀土总量的测定,方法简便、快速、准确。     

Geoid Determination through Ellipsoidal Stokes Boundary-Value Problem

Martinec and Grafarend (1997) have shown how the construction of Green's function in the Stokes boundary-value problem with gravity data distributed on an ellipsoid of revolution is approached in the O(e ₀ ² )-approximation. They have also expressed the ellipsoidal Stokes function describing the effect of ellipticity of the boundary as a finite sum of elementary functions. We present an effective method of avoiding the singularity of spherical and the ellipsoidal Stokes functions, and also an analytical expression for the ellipsoidal Stokes integral around the computational point suitable for numerical solution. We give the numerical results of solving the ellipsoidal Stokes boundary-value problem and their difference with respect to the spherical Stoke boundary-value problem.     

The role of constraints on joint hypocentre determination in seismotectonic studies

In this paper we show how the performance of the joint hypocentre determination (JHD) method can be improved, leading to reduced instability in cases close to singularity. The method has been extended by imposing a number of constraints introduced by other authors, and adding a new one. We tested the stability of the method and the relative advantages of the various constraints by simulating a geometrical space distribution of hypocentres recorded by a regional seismic network. We then applied this method to deep earthquakes that occurred in the Southern Tyrrhenian Sea subduction zone and to the seismicity of the Northern Apennines, which is moderately deeper than the typical shallow seismicity of the Apennines. The results obtained from the analysis of synthetic data and actual earthquakes confirm that the JHD method produces less scatter in the hypocentral determinations with respect to the standard locations. The main conclusion of our study is that we can significantly reduce the systematic mislocations that result from applying JHD to very clustered seismicity if we introduce the appropriate set of constraints.     

SVLBI用于大地测量的卫星轨道及其跟踪网设计

SVLBI （space very long baseline interferometry） has some important potential applications in geodesy and geodynamics, for which one of the most difficult tasks is to precisely determine the orbit of an SVLBI satellite. This work studies several technologies that will possibly be able to determine the orbit of a space VLBI satellite. Then, according to the types and charac- teristics of the satellite and the requirements for geodetic study and the geometry of the GNSS （GPS, GALILEO） satellite to track the space VLBI satellite, the six Keplerian elements of the SVLBI satellite （TEST-SVLBI） are determined. A program is designed to analyze the coverage area of space of different altitudes by the stations of the network, with which the tracking network of TEST-SVLBI is designed. The efficiency of tracking TEST-SVLBI by the network is studied, and the results are presented.     

利用CODE新光压模型的精密定轨研究

采用新光压模型ECOMC和ECOM-9,分别使用5种IGU精密超快速星历进行精密定轨,以最终IGS精密星历作为真值,比较GPS卫星的定轨精度.结果 表明,相较于ECOM-9光压模型,ECOMC光压模型能够提升卫星径向、切向和法向的轨道精度,其中径向提升较为明显;对比5种IGU超快速精密星历的定轨结果,ECOMC光压模型...     

水压致裂法测量裂隙岩体的地应力研究

通过对水压致裂法形成的钻孔印模分析,运用Taylor公式和最小二乘法迭代算法,计算纵向和横向裂隙岩体地应力大小及其误差。首先确定大地、裂隙和钻孔坐标系,根据印模曲线确定裂隙方位;然后用Taylor公式和最小二乘法迭代算法,计算应力分量;最后计算出主应力大小及其误差。将此方法应用于雪峰山隧址区ZK6钻孔的地应力场计算,得出其最大水平应力为13 MPa,方位113°左右,这与地质构造法实测的应力场相吻合,说明这一方法合理可行,具有较好的实用价值。      

萃淋树脂吸附法测金

对萃淋树脂在酸性介质中吸附解脱金及相关体系的条件选择，以及萃淋树脂在生产方面的应用前景进行了实验研究。结果表明，萃淋树脂在稀王水介质中能较好地吸附金，用硫脲解脱金简便完全，检测限达0．002μg／g，吸附率达100％，解脱率99．8％。     

砂岩型铀矿勘查样品中铀的野外快速测定方法研究

本文研究并建立了适合野外条件下快速测定砂岩型铀矿勘查试样中铀的分析方法———密闭酸溶试样、钒酸铵容量法测定铀。采用密闭增压酸溶样, 可使粒度小于0 25 mm的试样分解完全;小体积容量法提高了测定灵敏度。配合不同浓度的标准溶液可适应不同含量范围铀的测定。方法经标准物质和吐哈工区试样验证, 准确度和精度较高, 且操作简单, 适应性广, 具有实用和推广价值。     

8—氨基喹啉—5—偶氮—对苯甲酸的合成及应用—光度法测定痕量金

报道了新试剂8-氨基喹啉-5-偶氮-对苯甲酸(AQBA)的合成及分析应用。在阳离子表面活性剂CTMAB存在下,Au(Ⅲ)与AQBA在碱性介质中反应形成蓝绿色配合物,其最大吸收波长在608nm处,表观摩尔吸光系数为9.11×10~4L·mol~(-1)·cm(-1),Au量在0～1.8μg/ml范围内遵守比尔定律。所建立的新分析方法已应用于测定矿石及阳极泥中的痕量Au,结果满意。