电感耦合等离子体质谱法测定井间示踪剂中稀土元素

以甲醇为稀释剂,用电感耦合等离子体质谱法快速测定稀土示踪剂中17个稀土元素。研究表明,在优化的稀释剂甲醇浓度为2%(体积分数)、pH<2.47的条件下测定稀土元素,方法精密度(RSD)为1.23%~2.83%,日间6次测定的精密度为2.25%~4.76%,各稀土元素线性关系良好,检出限为2.0~9.0 ng/L;17个稀土元素的加标回收率为85%~108%,满足痕量元素分析要求。     

库伦滴定法测定岩矿试样中氯

本文提出用电生Ag~ 库伦滴定岩矿样品中痕量氯的方法。经对电解液组成、不同电解电流下的电流效率、干扰元素的分离等进行了实验研究,确定了最佳分析条件。实验结果表明:当测定氯量≥100μg时,回收率达99.5～99.9％,相对标准偏差0.33～0.03％;测定氯量≥10μg,回收率为98.6～98.9％;相对标准偏差2.5～0.58%;方法准确,重现性好,操作简便。用岩石和土壤一级标准物质检验及参加建材一级标准物质协作定值,结果满意。     

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％。     

山西省地下流体观测井地下水类型综合判定

为提升对山西省地下流体观测井承压性的进一步认识,以位于该省北、中、南部的朔州井、静乐井、祁县井、洪洞井和东郭井为研究对象,选取水位、气压观测数据,并利用井水位的理论固体潮数据,分别对井水位进行气压的阶跃响应函数计算、FFT频谱和潮汐相位响应分析,综合判定地下流体观测井—含水层类型,结果表明,5口观测井地下水埋藏类型均为半承压水。     

四川地区震后应急会商资料快速产出系统的设计与实现

地震预报意见以大量资料为基础,依靠专家经验和多学科知识并通过会商讨论形成。显著地震发生后,快速、准确、有效地研判震情可为后期应急指挥和地震现场工作奠定基础。本文以Datist软件为平台,基于四川及邻区的基础资料,设计研发符合四川震情的震后会商资料快速产出系统,当四川及邻区发生中强地震时,通过该系统可在收到地震短信5分钟内以请求触发的方式快速产出应急会商资料,并以微信、PowerPoint和Word的形式将基础资料发送给分析预报人员,为后期趋势分析奠定基础。     

哌啶树脂在富集分离中应用研究——Ⅰ.岩石矿物中痕量银的分离富集及测定

本文采用410哌啶树脂分离岩石矿物中基体元素后富集痕量Ag。交换酸度为0.25—3.5mol/LHCl介质,树脂柱上的Ag用热的0.5—1.0％硫脲解脱,并以火焰原子吸收法测定。方法简便、快速,用于岩矿中痕量Ag的富集和测定结果满意。     

Fast sequential indicator simulation: Beyond reproduction of indicator variograms

Sequential Indicator Simulation (SIS), although widely used, is relatively slow, and requires tedious inference of a large number of indicator variogram models. SIS is designed only to estimate class proportions and to reproduce indicator variogram models; the statistics of the continuous attribute being simulated,z-histogram and variogram, may be poorly reproduced. Several implementations of the SIS algorithm are proposed resulting in better reproduction of statistics yet with better CPU performance.     

A projective approach to orbit determination from three sight-lines

Concepts from projective geometry are used to provide a coherent framework for the determination of orbits from observation data comprising lines of sight at three known times. A novel way of presenting the results in a finite diagram is introduced, The effectiveness of the approach is demonstrated by an example, using a simple spreadsheet. A computer-graphic implementation is recommended.     

Modelling and distance determination of planetary nebulae

At present the lack of a good, generally accepted distance scale is the major limitation in the study of Planetary Nebula (PN) evolution and their distribution. We describe our fully self-consistent method to derive the physical parameters of a PN, including its distance, from a set of observables. For this we calculate various models and search for a best fit of the model predictions to the observables. An accurate determination of the angular diameter is important for a good distance determination. We think that we shall achieve an accuracy of 30% in distance. We estimate the error in stellar temperature at less than 15% and the uncertainty in the abundances at 0.10 dex.     

Yarkovsky detection opportunities: II. Binary systems

We consider the possibility of detecting the Yarkovsky orbital perturbation acting on binary systems among the near-Earth asteroids. This task is significantly more difficult than for solitary asteroids because the Yarkovsky force affects both the heliocentric orbit of the system's center of mass and the relative orbit of the two components. Nevertheless, we argue these are sufficiently well decoupled so that the major Yarkovsky perturbation is in the simpler heliocentric motion and is observable with the current means of radar astrometry. Over the long term, the Yarkovsky perturbation in the relative motion of the two components is also detectable for the best observed systems. However, here we consider a simplified version of the problem by ignoring mutual non-spherical gravitational perturbations between the two asteroids. With the orbital plane constant in space and the components' rotation poles fixed (and assumed perpendicular to the orbital plane), we do not examine the coupling between Yarkovsky and gravitational effects. While radar observations remain an essential element of Yarkovsky detections, lightcurve observations, with their ability to track occultation and eclipse phenomena, are also very important in the case of binaries. The nearest possible future detection of the Yarkovsky effect for a binary system occurs for (66063) 1998 RO₁ in September 2006. Farther out, even more statistically significant detections are possible for several other systems including 2000 DP₁₀₇, (66391) 1999 KW₄ and 1996 FG₃.