浅谈天然彩棉织物的质量

从生产实践出发 ,阐述了彩棉纤维物理指标对彩棉纱的性能、织物的强力、色牢度及色泽的影响。     

熔加色素法搪瓷色釉结构的研究

用ＳＥＭ、ＷＤＳ、ＩＲＲＳ、ＸＰＳ和ＡＳＳ对搪瓷色釉结构进行了研究熔加法的搪瓷色釉具有均匀分布的小尺寸、数量小的气孔。分析了搪瓷色釉的Ｏ１ｓ谱，并分解了成桥氧、非桥氧、及自由氧。熔加法的桥氧浓度远大于磨加法，而熔加法的非桥氧的浓度远低于磨加法，这表明熔加法的搪瓷色釉的结构强度高于磨加法。     

唐钢冷轧薄板工程介绍

简要介绍了唐山钢铁集团公司新近建设的 14 0万t连续酸洗线、 60万t冷轧线、 45万t热镀锌线和 15万t彩涂线的工艺流程和生产线主要技术参数     

Simultaneous state estimation and parameter identification in linear fractional order systems using coloured measurement noise

In the present paper, the identification and estimation problem of a single-input–single-output (SISO) fractional order state-space system will be addressed. A SISO state-space model is considered in which parameters and also state variables should be estimated. The canonical fractional order state-space system will be transformed into a regression equation by using a linear transformation and a shift operator that are appropriate for identification. The identification method provided in this paper is based on a recursive identification algorithm that has the capability of identifying the parameters of fractional order state-space system recursively. Another subject that will be addressed in this paper is a novel fractional order Kalman filter suitable for the systems with coloured measurement noise. The promising performance of the proposed methods is verified using two stable fractional order systems.     

电力系统结线分析的有色Petri网方法

从离散事件动态系统角度考虑电力系统结线分析问题,提出了基本分析单元的有色Petri网模型以及基于该Petri网的结线分析算法,Petri网中的令牌代表结线分析中的结点,令牌的颜色表示连接在同一个结点上的元件,变迁将包含相同元件的结点连接在一起,论文对基于Petri网的结线分析算法及传统的算法进行了比较,并计算了一个模型系统各变电站的结点及网络的结线,表明了该方法的可行性及有效性。     

基于有色Petri网的一种密码协议的描述和分析

Petri网作为一种数学工具,已被广泛应用于过程的描述、分析和验证。文章使用有色Petri网对文献[1]中提到的一种密码协议进行描述和分析,发现并验证该协议的安全缺陷。     

正三辛胺萃取—分光光度法测定原油中的痕量铅

以正三辛胺萃取分离干扰离子 ,采用 Pb( ) -水杨基荧光酮 -溴化十六烷基三甲铵显色体系测定原油中的痕量铅。考查了正三辛胺萃取分离干扰离子的条件和测定条件。表观摩尔吸光系数为 1 .2 5× 1 0 5L· mol- 1· cm- 1 ,合成样品回收率 1 0 0 .7% ,原油分析结果的相对标准偏差小于 3.3%。     

Filtering,smoothing and prediction using a control‐loop spectral factorization method for coloured noise

A method for the linear least‐squares estimation of random signals contaminated with random noise that uses a new method of spectral factorization is shown. It is shown that the optimal filter can be written entirely in terms of the two spectral factors of signal plus noise and noise‐alone, and can be applied to the general case of coloured and white additive noise. The method of spectral factorization used is novel and uses control‐system methodology. Copyright © 2012 John Wiley & Sons, Ltd.     

Effect of acetaldehyde and several acids on the formation of vitisin A in model wine anthocyanin and colour evolution

Summary It was found that the reaction between malvidin 3-glucoside and added pyruvic acid (PA), leading to the formation of vitisin A in model wine solutions, was not prevented by the addition of either acetaldehyde (A) or several organic acids. The acylated forms of vitisin A (3-acetylvitisin A and 3- p -coumarylvitisin A) were formed through the interaction of malvidin 3-acetylglucoside and malvidin 3- p -coumarylglucoside. Disappearance of the three main anthocyanins (malvidin 3-glucoside, malvidin 3-acetylglucoside and malvidin 3- p- coumarylglucoside) from the model wine with time followed first order kinetics. Acetaldehyde had the effect of increasing the total amount of these losses but producing smaller amounts of vitisin A. During ageing model solutions developed some browness. The brownest solution was obtained without A and a reduced rate of browning was found in the presence of A. This latter result can be explained by the assumption of a superimposition of a blueing effect upon reactions of A with anthocyanins. In the presence of PA the formation of vitisin A compounds gave an intermediate colour, contributing a reddish hue to the solution. A good correlation (r²= 0.96) between the percentage of vitisin A, of the total anthocyanins and the hue angle was observed. The addition of large amounts of organic acids that are normally found in wine into the model solutions did not lead to the formation of new anthocyanins. The linear loss of PA in all model systems indicates that a first order reaction occurs and 35.35 times more PA than total anthocyanin was lost to form the new compounds.     

正三辛胺萃取-DPC-CPB显色体系分光光度法测定原料油中的痕量铜

用正三辛胺萃取分离干扰离子，以二苯碳酰二肼（ＤＰＣ）－溴化十六烷基吡啶（ＣＰＢ）－聚乙二醇辛基苯基醚（ＯＰ）为显色体系测定原料油中的痕量铜。考察了测定条件。线性范围０～１．０μｇ／２６ｍＬ，合成样品回收率为１０４％，油样加标回收率在９５％～１１０％之间，油样分析结果的相对标准偏差小于８．８％。方法的灵敏度高，表观摩尔吸收系数为４．９×１０６Ｌ（ｍｏｌｃｍ）－１。