Comprehensive management of mineral scale deposition in carbonate oil fields – A case study

The majority of oilfields, especially those under water injection suffer from scale deposition. The common method of addressing the scale issue is to deploy the integrated scale risk management, by which the data from all available disciplines such as Chemistry, Field Engineering, Completion Engineering, etc. are integrated to make the most suitable decision. The main aim of this study is to perform integrated scale risk management in the A carbonate oil field, under water injection.     

Corrosion evaluation of cobalt based magnetic films using various techniques

 The corrosion of magnetic media has progressively became detrimental for computer hard-disk drive operation due to thinner protective overcoat (∼10 nm) and lower flying height of the magnetic head (∼20 nm), as required by high recording density. The corrosion product of cobalt oxide on the disk surface as migrated from cobalt alloy under the overcoat was evaluated using various techniques. The techniques applied were Time of Flight Secondary Ion Mass Spectroscopy (TOF-SIMS), Ion Chromatography (IC) and Inductively Coupled Plasma-Optical Emission Spectroscopy (ICP-OES). Electrochemical method and X-ray Photo-emission spectroscopy were found to have insufficient sensitivity for the corrosion level investigated. TOF-SIMS was found to be the most sensitive and repeatable technique among all the techniques. The cobalt amount was found to increase with decreasing overcoat thickness and with increasing exposure time to high humidity (80%) and high temperature (60°C), as encountered in disk drive storage conditions. The time dependence of cobalt amount on exposure time suggests a diffusion mechanism for cobalt migration to the disk surface. Some of those techniques can be applied to measure other corrosion products and/or to other fields for corrosion studies as well. Received: 24 November 1997 / Accepted: 13 December 1997     

多视点三维数据配准的并行计算方法

首先对集群系统的特点、基本分类以及体系结构做了简单介绍,接着通过研究三维建模中视点配准的串行算法-ICP算法,找出该算法的并行性,采用合适的数据分配方案并在此基础之上开发出该算法的并行程序,并通过实验,给出了该并行算法的加速比。     

Barrier Effect of Placenta Membrane of Pregnant Rat on Mixed Rare Earth Changle

MixedrareearthChangleisamixturecomposedofLa ,Ce ,Pr ,andNdnitrates ,inwhichcontentofCeisthemost .Ithasbeenwidelyusedasafeedad ditiveinanimalhusbandryinChina ,Thefactcuesthatalittlerareearthnitratemaygraduallyenterhu manbodywithconsumptionoffood ,furthermorerareearthnitratecannotbeexcretedcompletelywhilecanbeaccumulatedintheliver ,spleenandbone[1] ,theincreasingaccumulationiswithlongertime ,thereforeitisveryimportantthatsafetyofrareearthsnitrateisassessed .Therelationshipbetweenapplieddosean…     

微波消解-ICP-AES法同时测定花岗石中有害元素的研究

研究了微波消解样品,试液用ICP-AES法同时测定样品中铅、镉、铬、砷的新方法。在选定的最佳条件下测铅、镉、铬、砷的检出限分别为0.0008、0.0007、0.0018、0.0012(μg·L~(-1)),回收率为93.4％～102.5％,RSD为1.3％～3.6％。该法准确、快速、简便,应用于花岗石的测定,结果满意。     

Inductively coupled plasma reactive ion etching of SiC single crystals using NF<Subscript>3</Subscript>-based gas mixtures

Inductively coupled plasma reactive ion etching of SiC single crystals using NF₃-based gas mixtures was investigated. Mesas with smooth surfaces and vertical sidewalls were obtained, with a maximum etch rate of about 400 nm/min. Effects of CH₄ and O₂ addition to the NF₃ gas and the crystalline quality of substrates were studied during the SiC dry etching using various masks. Selectivity of the photoresist (PR) mask improved from about 0.2 to about 0.4 by the addition of 30% CH₄ during the RIE, although the etch rate decreased by 50–70%. Results also indicated that the substrate quality does not significantly affect the etch results.     

ICP发射光谱仪矩管部分的使用

在使用DRE系列ICP发射光谱仪过程中，根据使用中矩管外观的异常现象进行原因查找。逐步改变操作参数，从而减少矩管的损耗，延长其使用寿命，最终达到规范仪器使用操作的目的。     

基于SIMOX的耐高温压力传感器芯片制作

针对石油化工等领域中高温下较高压力测量的要求，设计了压阻式压力传感器敏感芯片，采用SIMOX技术的SOI晶片，在微加工平台上通过低压化学气相淀积法(LPCVD)均相外延硅测量层、浓硼离子注入、热氧化、光刻、电感耦合等离子体（ICP）深刻蚀、多层合金化等工艺流程制作了该芯片，将其封装后，研制出了高精度稳定性佳的耐高温压阻式压力传感器．封装工艺进一步改善后，该芯片工作温区有望拓宽到300～350℃．     

硫酸亚锡在电动自行车用VRLA电池中应用的进一步研究

为了研究硫酸亚锡在电动自行车VRLA电池中对初始容量、循环寿命的影响,笔者设计并配制了不同添加剂含量的电解液试制电池。通过对电解液的元素分析、ICP分析物相分析、初始容量对比,结果表明:在电解液中,硫酸亚锡添加量应严格控制,若能达到最佳添加量,则既可提高初始容量,又能增加循环寿命。     

ICP刻蚀技术与模型

从ICP刻蚀装置、ICP刻蚀技术及模拟模型以及可用于ICP刻蚀模拟的CAD工具研究现状等几方面,对ICP刻蚀过程中所涉及的原理和模型做了较为详细的介绍和比较,以使对ICP刻蚀技术及模型有一个较为全面的认识。