A/D转换器MAX151及其在伽玛谱仪中的应用

详细介绍了快速A／D转换器MAX151的原理、特性、主要技术指标及其应用，并阐述了该A／D转换器在伽玛谱仪中与单片机89C51的接口方法。     

应用于静力触探中串行控制的数据采集系统

设计了应用于静力触探中的数据采集系统,给出了系统电路原理图并主要介绍了MAX132芯片及它的软件算法。该系统以AT89C2051单片机为控制核心,主要采用可编程的±18位串行A/D转换器MAX132进行数据采集并转换,通过RS232串行通信接口与上位机进行异步串行通信。     

液压模拟实验仪数据自动采集系统及其软件设计

介绍了“液压模拟实验仪数据自动采集系统”的工作原理和程序设计。该系统由压力传感器、位移传感器、信号放置放大和信号隔离、Ａ／Ｄ转换器、微机系统、外部设备及系统软件等部分组成。该系统的研制成功,不仅提高了工作效率,提高了数据的精度和采样频率,而且为液压模拟实验仪的自动控制系统研制奠定了基础。     

一种用于A/D转换的量程自动控制电路

提出了一种不需CPU干预的、用于A／D转换的高速量程自动控制电路,并详细介绍了它的工作原理。     

液压模拟实验仪数据自动采集系统及其软件设计

介绍了“液压模拟实验仪数据自动采集系统”的工作原理和程序设计．该系统由压力传感器、位移传感器、信号前置放大和信号隔离、Ａ／Ｄ转换器、微机系统、外部设备及系统软件等部分组成．该系统的研制成功,不仅提高了工作效率,提高了数据的精度和采样频率,而且为液压模拟实验仪的自动控制系统研制奠定了基础．     

工程桩基仪中的浮点A／D技术

介绍了浮点A／D转换原理、实用电路和在桩基仪中的设计。浮点A／D转换方法，具有动态范围大、信噪比大等特点，可对大动态范围输入信号进行压缩，在桩基工程检测等信号变化范围大、可靠性要求高的场合中得到了很好的应用。     

A／D转换与地震仪的发展

地震数据采集具有采集点分布范围广、滚动搬移工作量大等特点，因此就需要一套体积小、重量轻、连线简单、供电方便、耗电量小的采集器。目前24位A／D型数字地震仪器已具备瞬时动态范围大、失真小、无零点漂移、系统规模大(带道能力)和软件功能强劲等特点。随着电子行业的飞速发展，A／D转换器等电子器件已发展成为高度模块化、智能化及高精度的绿色节能型芯片。其器件体积小、功耗低、集成度高、功能强，为地震数据采集仪器更新换代，实现低功耗、单道、小体积、高精度、高分辨率的数字化采集器创造了有利条件。     

基于MSC1210的水质快速检测仪

文章介绍了一种用于野外污染调查的水质快速检测系统,可以检测温度、pH值、溶解氧和氟离子四个参数。该系统的微处理器选用功能强大并自带24位A/D转换器的单片机MSC1210。文中给出了实现该仪器功能的硬件设计、软件模块框图以及部分程序流程图。该系统具有响应速度快、处理能力强、精度高、功耗低等优点。现场使用表明该仪器运行稳定、可靠。     

用于进行电阻率测量的512道实时数据采集系统的研制

研制了一种用于电阻率测量的有效三维数据采集系统，其中采用了一种新的采集方法，能够使５１２个测点组同时测量。在常规系统中，所接收的波经过Ａ／Ｄ转换器转换为数字形式，并存入时间序列中。     

氢化物原子荧光光谱分析仪的微机数据处理系统

本工作实现和描述了一种用于处理双道氢化物原子荧光光谱仪数据的微机系统。该系统不仅能拟合线性工作曲线,而且能拟合非线性工作曲线,特别是采用直线和曲线分段拟合工作曲线后,可使测量范围得到较大的扩展,我们用直线——抛物线分段拟合的砷的工作曲线进行试验和 F 检验证明其相关关系和拟合程度都是高度显著的,在使用八位 A/D 转换器的情况下,高至200ppm 的砷可无须稀释直接测定,这对具不同含量样品的常规分析是特别有利的,提高了准确度和测试效率。用具有本系统的氢化物 AFS 对地质矿产部的一级标准样品 As、Sb、Bi 的分析结果说明,系统是相当准确可靠的,此外本系统还具有编辑、校正等功能,可以根据分析者的要求打印分析报告单。     

Définition d'une limite multicritère ; stratigraphie du passage Campanien–Maastrichtien du site géologique de Tercis (Landes,SW France)Definition of a multi-criteria boundary; stratigraphy of the Campanian–Maastrichtian interval of the geological site at Tercis (Landes,SW France)

Lithostratigraphy, physicochemical stratigraphy, biostratigraphy, and geochronology of the 77–70 Ma old series bracketing the Campanian–Maastrichtian boundary have been investigated by 70 experts. For the first time, direct relationships between macro- and microfossils have been established, as well as direct and indirect relationships between chemo-physical and biostratigraphical tools. A combination of criteria for selecting the boundary level, duration estimates, uncertainties on durations and on the location of biohorizons have been considered; new chronostratigraphic units are proposed. The geological site at Tercis is accepted by the Commission on Stratigraphy as the international reference for the stratigraphy of the studied interval. To cite this article: G.S. Odin, C. R. Geoscience 334 (2002) 409–414.     

Quaternary stresses revealed by calcite twinning inversion: insights from observations in the Savonnières underground quarry (eastern France)

Calcite samples were extracted both from the rock matrix and the superficial coating of a karstified fault plane of an underground quarry, located in the eastern border of the Paris basin. The karstification is dated as Quaternary. Analysis of mechanical calcite twinning reveals that only the calcite matrix has also undergone a compression trending WNW that can be attributed to the Mio-Pliocene alpine collision. Both coating and matrix have undergone a strike-slip regime with σ₁ roughly trending north–south, that could correspond to the regional present-day state of stress, a strike-slip compression rather trending NNW, modified by local phenomena. To cite this article: M. Rocher et al., C. R. Geoscience 335 (2003).     

NONMETALS DEPOSITS

正20141520 Bo Ying(Key Laboratory of Metallogeny and Mineral Assessment,MLR,Beijing 100037,China);Liu Chenglin Saline Spring Hydrochemical Characteristics and Indicators for Potassium Exploration in Southwestern and Northern Tarim Basin,Xinjiang(Acta Geoscientica Sinica,ISSN1006-3021,CN11-3474/P,34(5),2013,p.594-602,5 illus.,3 tables,28 refs.)     

MATHEMATICAL GEOLOGY

正20141243Chen Ge(Hangzhou Research Institute of Petroleum Geology,PetroChina,Hangzhou 310023,China);Si Chunsong Study on Sedimentary Numerical Simulation Method of Fan Delta Sand Body(Journal of Geology,     

PROSPECTING EXPLORATION

正20142599Chen Sanming(Guangxi Key Laboratory of Concealed Deposits Exploration,Guilin University of Technology,Guilin541004,China);He Yuzhou Block Model and Reserves Estimation of Panzhihua Iron Deposit Based on 3D Geological Modeling(Journal of Guilin University of Technology,ISSN1674-9057,CN45-1375/N,33(4),2013,p.610-615,9illus.,1table,15refs.)     

STRUCTURAL GEOLOGY

正20140594 Bai Daoyuan(Hunan Institute of Geology Survey,Changsha 410016,China);Zhong Xiang Faults in the Jingzhou Basin and Their Tectonic Settings(Geotectonica et Metallogenia,ISSN1001-1552,CN44-1595/P,37(2),2013,p.173-183,6illus.,59refs.)Key words:basin evolution,tectonic setting,South China In the Upper Paleozoic and Jurassic se-     

STRUCTURAL GEOLOGY

正20141912Cao Hui(State Key Laboratory for Continental Tectonics and Dynamics,Institute of Geology,Chinese Academy of Geological Sciences,Beijing 100037,China)Gravitational Collapse and Folding during Orogenesis:A Comparative Study of FIA Trends and Fold Axial Plane Traces(Geology in China,ISSN1000-3657,CN11-1167/P,40(6),2013,p.1818-1828,9illus.,35refs.,with     

PALEOZOOLOGY

正20141609 Chen Guiying(College of Earth Sciences,Guilin University of Technology,Guilin 541004,China);Han Nairen New Materials of Stylophora from the Upper Cambrian of the Jingxi Area,Guangxi,South China(Acta Palaeontologica Sinica,ISSN0001-6616,CN32-1188Q,52(3),2013,p.288-293,2 illus.,12 refs.)Key words:Stylophora,Guangxi     

GEOPHYSICS

正20140634 Cao Lingmin(Key Laboratory of Marine Geology and Environment,Institute of Oceanology,Chinese Academy of Sciences,Qingdao 266071,China);Xu Yi Finite Difference Tomography of the Crustal Velocity Structure in Tengchong,Yunnan Province(Chinese Journal of Geophysics,ISSN0001-5733,CN11-2074/P,56(4),2013,p.1159-1167,6illus.,35refs.,with English abstract)