硅钡铁合金冶炼过程中Si—Ba—C—O系热力学分析

通过对硅钡铁合金冶炼过程中Ｓｉ－Ｂａ－Ｃ－Ｏ系内反应的热力学计算和分析，提出了该合金冶炼过程的反应模式。     

稀土合金的金相样品制备及组织分析

以Ｌａ－Ｃｏ－Ｎｉ三元系和Ｎｄ－Ｃｕ、Ｇｄ－ＣＵ二元系为例,介绍了稀土合金相试样的制备步骤和原则,给出了用该方法制作的５Ｌａ－７３Ｃｏ－２２Ｎｉ、５Ｌａ－８９Ｃｏ－６Ｎｉ、２５．６Ｌａ－３４Ｃｏ－４０．４Ｎｉ、Ｎｄ－６９Ｃｕ、Ｇｄ－１２Ｃｕ等成分合金的金相照片,并进行了适当的分析。     

金属及合金中磷的光度分析

本文评述了金属及合金中磷的光度分析新近的发展状况，重点介绍磷钼蓝直接分光光度法，磷钼蓝萃取分光光度法，二元杂多酸－染料分光光度法和荧光分析法以及三元杂多酸－染料分光光度法。     

8-氨基喹啉新衍生物的合成及其与铜的荧光反应研究

合成了三种８－氨基喹啉偶氮衍生物。对试剂５－（２－胂酸基苯偶氮）－８－氨基喹啉（ｏ－ＡＰＡＱ）与铜（Ⅱ）的荧光反应进行了较为详细的研究,试剂与铜在 ｐＨ７．２～ ８．８的水介质中形成淡黄色络合物,在λ_(ｅｍ)／λ_(ｅｘ)＝３８０ｎｍ／２８４ｎｍ处产生强荧光。建立了一个灵敏和选择性好的荧光分析新方法,线性范围在０～１５ｎｇ／ｍＬ,检测限为０．０４ｎｇ／ｍＬ,所拟方法准确、方便,用于混合样品中铜（Ⅱ）的测定,结果满意．     

65MnTi盘条拉拔过程中出现为裂的原因分析

分析检验拉拔过程中发生断裂的６５ＭｎＴｉ盘条的金相组织和断口形貌，得出结论：６５ＭｎＴｉ盘条发生为裂的原因是热轧后冷却速度速度过快，金相组织中出现了低温转变组织－－马氏体组织，而理想的组织应为索氏体；并且最佳冷却速度为５℃／ｓ左右。     

转炉控制信息与在线检测技术(下)

Convertercontrolinformationanditson-linemeasurement(B)LiuLiu(CentralIronandSteelResearchInstituteBeijing100081)2．2吹炼过程中的连续检测方法‘’‘’使用炉气分析方法,实现对转炉吹炼过程的连续检测。炉气分析的检测原理如下。门）利用转炉脱碳产生CO、Co炉气这一特点,采用质谱仪（或其它气体分析方法）连续分析炉气中CO、COZ的成分,计算出瞬时脱碳速度：d［CIO．89Q。t。rt＝＝－－－－－－－（oalfo＋％ha）dtW””””’”””””式中％Q;;,％CC;;。分别为炉气中CO和COZ的体积分数;Win为熔池中钢水重量…     

我国钼的分析现状与展望

综述了在１９７９－１９９６年期间，我国钼分析方法的概况。内容包括重量分析，滴定分析，仪器分析，钼产品的杂质分析，钼分析和钼分析的展望。     

锆与锆合金中铪的分析进展

本文评述了十多年来锆与锆合金中铪的分析进展，包括分光光度法，原子吸收光谱法，原子发射光谱法，等离子体－原子发射光谱法，同位素质谱法，等离子体－质谱法，中子活化法和Ｘ射线荧光光谱法。     

HV—4B分析仪的应用

本文介绍ＨＶ－４Ｂ型微机碳硫分析仪与ＨＢ－２Ｂ型高引燃炉配套使用,在分析测定钢铁中的碳、硫元素时取代传统的非水－碘量滴定法,针对传统的化学分析法存在的问题,进行分析,改造,引进了高速仪器分析法,并取得了较好的效果。     

从选金厂出的活性炭的有机污塞物鉴定

鉴定在金氰络合物吸附过程中活性炭上有机污塞物的途径之一，就是采用热重分析法（TG）。但遗撼的是，热重分析法只能给出有机污塞物的总百分数，而不能查明各个化合物。然而，以前用纯试剂吸附在活性炭上的试验表明，当采用加热分解时，析出的气体是一种特定污塞剂的特征。本文报道了利用这一信息和3种热分解技术，即：热解吸－－高温分解－－气相色谱－－质谱法（TD－py－GC－MS）、热重分析－－质谱法（TG－MS）和热重分析－－傅里叶变换红外光 法（TG－FTIR），以查明从选金厂取出的活性炭样品上的有机污塞剂，对取自一家选金厂（A工厂）的一组样品进行的分析表明，正如在360－400℃检测到羰基硫化物所表明的那样，出现了由黄原酸盐引起的污塞，对于从另一家选金厂（B工厂）取出的活性炭，在大约370℃和215－540℃时分别检测到丙醛和羰基硫化物，表明出现的污寒分别是由于起泡剂和黄原酸盐而引起的。这些样品的热分析表明，析出了很多其它的气体说明存在着另外一些未知的有机污塞剂。     

泡沫塑料吸附解析法测金影响因素的探究

针对泡沫塑料吸附解析法应用情况进行讨论,以测定金含量为例,进行了简单的条件分析试验,对泡沫塑料吸附解析法测金的实验过程及关键步骤跟踪分析,并对影响泡沫塑料吸附解析法测金影响因素进行了探究,由实验结果表明在水浴时间40min,硫脲解析液浓度20g/L,解析液盐酸浓度为1%时,解析液对金的解析效果较好,并有效的提高了测金分析的稳定性。     

The state and the egalitarian, ecclesiastical and liberal regimes of gender relations

In this paper I attempt to construct a comparative analytical framework for the study of the state as a social relation and the regulation of gender relations. The first part of my analytical framework involves an analysis of the women's movement as an agent of political change. In the second part of my analytical framework, three typologies of regimes of gender relations are developed in order to capture the essential features of gender relations in different countries. These typologies are the egalitarian regime of gender relations, the ecclesiastical regime of gender relations and the liberal regime of gender relations. The final part of the comparative analytical framework involves an analysis of the dynamics of transformation of regimes and transition to new regimes. The main contribution of my typologies is that they analyse, on the one hand, how gender relations are regulated by the state in different parts of the economy (social reproduction included) that are relatively autonomous and identify, on the other hand, how social forces influence the nature of the state as a regulator of gender relations.     

稀土永磁磁场分布研究方法的评述

在概述稀土永磁磁选设备磁系设计的重要性和存在不足的基础上,系统评述了稀土永磁磁场分布的实验研究法、数值计算法及解析解法,并对其优缺点进行了分析比较。在理论分析中,提出采用解析解法以便从动力学角度进行磁分离原理研究及建立相应的数学模型,从而为该理论的实际应用奠定相应的理论基础。     

A study of the effects of special preparation on GRE analytical scores and item types.

A brief curriculum of special preparation for the analytical section of the Graduate Record Examination (GRE) Aptitude Test was developed and administered to a sample of 25 self-selected GRE candidates. Ss' reactions to the materials and procedures used were obtained from a brief evaluation form given at the end of the course. The effects of the program on analytical scores were determined by comparing the scores subsequently obtained by the specially prepared candidates with the scores of 415 students taking the test on the same day at the same place. Analyses revealed an effect on analytical scores that was both practically and statistically significant. The effect stemmed from improved performance on 2 of the 3 analytical item types formerly included in the analytical section. Hypotheses concerning the components of the special preparation that led to the improvement are discussed. (17 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Validity of linear regression in method comparison studies: is it limited by the statistical model or the quality of the analytical input data?

We compared the application of ordinary linear regression, Deming regression, standardized principal component analysis, and Passing-Bablok regression to real-life method comparison studies to investigate whether the statistical model of regression or the analytical input data have more influence on the validity of the regression estimates. We took measurements of serum potassium as an example for comparisons that cover a narrow data range and measurements of serum estradiol-17beta as an example for comparisons that cover a wide data range. We demonstrate that, in practice, it is not the statistical model but the quality of the analytical input data that is crucial for interpretation of method comparison studies. We show the usefulness of ordinary linear regression, in particular, because it gives a better estimate of the standard deviation of the residuals than the other procedures. The latter is important for distinguishing whether the observed spread across the regression line is caused by the analytical imprecision alone or whether sample-related effects also contribute. We further demonstrate the usefulness of linear correlation analysis as a first screening test for the validity of linear regression data. When ordinary linear regression (in combination with correlation analysis) gives poor estimates, we recommend investigating the analytical reason for the poor performance instead of assuming that other linear regression procedures add substantial value to the interpretation of the study. This investigation should address whether (a) the x and y data are linearly related; (b) the total analytical imprecision (s(a,tot)) is responsible for the poor correlation; (c) sample-related effects are present (standard deviation of the residuals > s(a,tot)); (d) the samples are adequately distributed over the investigated range; and (e) the number of samples used for the comparison is adequate.     

Problems of Analytical Control in the Production of Rare and Precious Metals

This article is devoted to one important issue in the development of rare and precious metals industry— analytical control (AC). The current state, importance, problems, and prospects of the development of AC as an integral part of the production of rare and precious metals and quality assurance of products are considered. Modern methods of AC—atomic-spectral, mass-spectral, X-ray fluorescent, combined, and rational fields of their application—are characterized. It is shown scientific-and-technical progress is inextricably associated with a cardinal increase in a nomenclature of materials based on rare and precious metals and an increase in requirements for their quality. This will require the development of new methods of AC and improving existing ones, standardizing them, and metrological support. To carry out this work, it is necessary to attract research organizations of the Russian Academy of Sciences, universities, branch institutes with research laboratories that have survived the dissolution of the Soviet Union, and activate factory science. It is necessary to effectively use the achievements of advanced analytical laboratories abroad and participate in international comparative trials. At the same time, special attention is paid to unsolved problems—a scientifically justified formulation of requirements for new types of products based on rare and precious metals; the development and metrological assessment of sampling techniques; the development of high-quality metrological support for the AC of production of rare and precious metals; improving analytical methods; standardizing analytical methods; the accreditation of analytical laboratories; and the education and training of highly qualified analytical chemists.     

An analytical description of the jet finishing process for hot-dip metallic coatings on strip

An analytical study of the jet finishing of hot-dip metallic coated strip which relates the final solidified coating thickness to strip speed, jet nozzle operating parameters, and coating metal and finishing fluid properties is described. The results of laboratory and mill tests are compared with the predictions of the analytical model and engineering considerations for jet nozzle operation to reduce coating weight at increased line speed are discussed.     

2014年云南冶金分析年评

评述了云南分析工作者2014年在国内刊物上发表的有关冶金分析的论文,内容包括综述、分离富集方法和分析检测方法。分析检测方法主要包括电化学分析法、分子光谱、原子光谱、滴定法和重量法、以及其它分析方法,引用文献58篇。     

2013年云南冶金分析年评

评述了云南分析工作者2013年在国内刊物上发表的有关冶金分析的论文,内容包括综述、分离富集方法和分析检测方法.检测方法主要包括电化学分析法、分子光谱、原子光谱、滴定法和重量法、以及其它分析方法,引用文献57篇.     

A model for the fluid motion of vitreous humour of the human eye during saccadic movement

During saccadic motion the eyewall moves in a manner similar to a sinusoid or at least can be represented by a sine Fourier series. Motion of the vitreous is induced by the saccade and the vitreo-retinal interface is subjected to a time-dependent shear. This force may be a significant factor for retinal tearing in the neighbourhood of small retinal holes or tears. An analytical viscoelastic model and a numerical, Newtonian model of the motion of the vitreous are presented and compared. Under sinusoidal boundary motion the analytical model shows that a viscous wave propagates inward toward the axis of rotation and the characteristic length of this wave is a function of the Womersley number. The numerical solution indicates that the vitreous moves similarly to the analytical result with small secondary motion; however, this motion allows complete recirculation of the vitreous over large timescales. Excellent agreement is found between the analytical and numerical models. The time-dependent fluid shear is evaluated and from the analytical solution the maximum value of this is found to be proportional to R0 square root of v(omega)3, where R0 is the eye radius, v the modified complex viscosity and omega the sinusoidal frequency. This indicates that myopes have a larger shear force exerted on them by virtue of the larger eye size. Further work is directed toward a model which links the stress found in the sclera to that exerted on the vitreo-retinal interface by the vitreous fluid motion.