网络RTK在北京市矿业权实地核查中的应用

本文结合北京市东城区花市枣苑小区地热开采数据成果,分析了网络RTK的主要工作原理,以及该技术在矿业权实地核查领域中应用的潜力。     

Derivation of elemental abundance maps at intermediate resolution from optical interpolation of lunar prospector gamma-ray spectrometer data

We propose a technique that interpolates available lunar prospector gamma-ray spectrometer (GRS) data using Clementine UVVIS spectral reflectance images. The main idea is to use low resolution GRS data as a “ground truth” to establish relationships linking optical data and geochemical information maximizing the respective correlation coefficients. Then the relationships and Clementine UVVIS data are used to derive elemental abundance maps with significantly improved spatial resolution. The main limitation of the technique is its dependence on how well the abundance of the elements correlates with the Clementine UVVIS data. The technique can also be applied to analysis of coming D-CIXS/Smart-1 and AMIE/Smart-1 data to increase resolution of lunar compositional maps. As an illustration of the suggested technique, maps for the elements Fe, Ti, O, Al, Ca, and Mg with pixel size 15 km×15 km are presented. The Fe and Ti distributions resemble qualitatively to the maps obtained with the well-known technique by lucey et al. (2000a. Lunar iron and titanium abundance algorithms based on final processing of Clementine ultraviolet-visible images. J. Geophys. Res. 105, 20,297-20,306), though in our case the ranges of Fe and Ti variations are, respectively, wider and narrower than for lucey's maps. New maps for the elements Fe, Ti, O, Al, Ca, and Mg appear to be informative. For instance, the map of oxygen abundance demonstrates an anomaly in the crater Tycho. The maps of Fe and Al contents show for highland regions slight variations related to maturity degree. Reliability of this relation is confirmed with lunar sample data. The reason of the correlation between chemical composition and exposition age of the lunar surface can be the global transport of the lunar surface material due to meteorite impacts.     

游标法事件计时器

根据游标法事件计时器的设计原理，给出基于现场可编门阵列(FPGA)的设计方案，并对实现游标法事件计时器的技术难点进行相关分析。     

Exposure dating and glacial reconstruction at Mt. Field,Tasmania, Australia,identifies MIS 3 and MIS 2 glacial advances and climatic variability

Tasmania is important for understanding Quaternary climatic change because it is one of only three areas that experienced extensive mid‐latitude Southern Hemisphere glaciation and it lies in a dominantly oceanic environment at a great distance from Northern Hemisphere ice sheet feedbacks. We applied exposure dating using ³⁶Cl to an extensive sequence of moraines from the last glacial at Mt. Field, Tasmania. Glaciers advanced at 41–44 ka during Marine oxygen Isotope Stage (MIS) 3 and at 18 ka during MIS 2. Both advances occurred in response to an ELA lowering greater than 1100 m below the present‐day mean summer freezing level, and a possible temperature reduction of 7–8°C. Deglaciation was rapid and complete by ca. 16 ka. The overall story emerging from studies of former Tasmanian glaciers is that the MIS 2 glaciation was of limited extent and that some glaciers were more extensive during earlier parts of the last glacial cycle. Copyright © 2006 John Wiley & Sons, Ltd.     

在线液-液萃取微型万用分相器的设计和应用 Ⅰ.连续流动萃取石墨炉原子吸收测环境水中镉和不同价态的铬

计了一种用于液＿液萃取，可与各种检测器配合并适用于比重大于或小于水的有机溶剂的微型万用分相器及相应的流路系统。用于与石墨炉原子吸收分光计联用测定环境水中镉和铬，检出限分别为５８ｎｇ／Ｌ和０１７μｇ／Ｌ，精密度（ＲＳＤ，ｎ＝９）分别为５４％和６７％，加标回收率为９２％～１０８％，样品测定速率为３０／ｈ。     

光温敏核不育水稻幼穗育性转换期蛋白质组的初步分析

为找寻光温敏核不育水稻幼穗与育性调控有关的蛋白质,采用固相pH梯度-SDS聚丙烯酰胺双向凝胶电泳对光温敏核不育水稻(培矮64S)育性转换期幼穗总蛋白进行了分离,获取凝胶图像并进行重复性分析,通过微量测序-Edman降解方法和原位酶解及MALDI-TOF质谱的方法鉴定了60个蛋白质点。结果表明:本方法可得取分辨率和重复性较好的凝胶图谱。蛋白质点在2D胶上的重复性为:沿等电聚焦方向偏差为1.49±0.22 mm,沿SDS-PAGE方向偏差为1.24±0.18 mm。37个蛋白质点得到了准确的鉴定结果,其中16个是差异蛋白质点。在不育变化为可育的过程中,明显表达上调的蛋白质点包括几丁质酶,丙酮酸脱氢酶等;明显下调的蛋白质包括超氧化物歧化酶,硝酸还原酶脱辅基酶蛋白等;金属硫蛋白RicMT只在可育中存在。     

Scientific CMOS Pixels

High performance CMOS pixels are introduced; and their development is discussed. 3T (3-transistor) photodiode, 5T pinned diode, 6T photogate and 6T photogate back illuminated CMOS pixels are examined in detail, and the latter three are considered as scientific pixels. The advantages and disadvantages of these options for scientific CMOS pixels are examined. Pixel characterization, which is used to gain a better understanding of CMOS pixels themselves, is also discussed. This revised version was published online in July 2006 with corrections to the Cover Date.     

气相色谱—质谱法测定蒸馏出的混合物中硼酸三甲酯

硼酸三甲酯是合成储氢材料硼氢化钠的重要原料,以硼酸、甲醇为原料合成硼酸三甲酯是目前硼酸三甲酯合成的重要方法之一。提供了一种测定硼酸、甲醇合成硼酸三甲酯蒸馏混合物中硼酸三甲酯成分、含量的测定方法,即气相色谱一质谱法(GC-MS)。该方法简单、快捷、准确。确定了优化的GC-MS测定条件,适合不同合成条件下蒸馏后混合物中硼酸三甲酯的定性、定量。测定结果表明,该方法对同一条件下合成混合物中硼酸三甲酯做测定分析,加标回收率在91.8%¹00.5%,相对标准偏差1.9%100.5%,相对标准偏差1.9%⁴.1%,检出限3.64 mg/mL。通过对16组不同工艺合成条件下混合物中硼酸三甲酯的测定分析,该方法重复性较好,较为稳定,对硼酸三甲酯检测分析具有重要意义。     

金矿放射性γ能谱特征及其应用研究 ——以瓜州县老金厂金矿为例

2013年瓜州县老金厂金矿利用物探综合方法对矿区进行了勘查,开展了1∶2000激电、高精度磁测、放射性能谱测量等工作,对矿区断裂进行了推测,预测了找矿有利地段,并布置钻探工程,找到了新矿体,特别是在该矿区上试用γ能谱测量,结果表明在矿体上,K,U含量高,Th含量一般,并有明显异常反应,通过比值分析和异常深部验证,取得了找矿效果,在金矿勘查上应用物探新方法做了有益尝试。