Preparation and electrochemical properties of poly‐2,5‐dihydroxyaniline/activated carbon composite electrode in organic electrolyte

Poly‐2,5‐dimethoxyaniline coating has been fabricated on active carbon (AC) substrates by cyclic voltammetry (CV) in organic system. The resulted coating is hydrolyzed to produce poly‐2,5‐dihydroxyaniline (PDHA) to enhance the capacitance of the composite electrode. Scanning electron microscope, Fourier transform infrared spectroscopy, X‐ray diffraction, Raman spectra, CV, electrochemical impedance spectroscopy, and galvanostatic charge/discharge test are used to investigate the properties of these electrodes. In organic electrolyte, due to the introduced hydroquinone units, high value of capacitance up to 975 F g^?1 of the PDHA/AC has been obtained at a current density of 0.37 A g^?1 at a potential window of 0–1.5 V. An asymmetric capacitor has been assembled with the PDHA/AC positive and pure AC negative electrodes, which is able to obtain a specific energy as high as 178 Whkg^?1 in the potential range of 0–2.0 V at a current density of 0.93 A g^?1. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013     

Synthesis of bio‐based polyurethanes from epoxidized soybean oil and isopropanolamine

Epoxidized soybean oil (ESO) and isopropanolamine were used to synthesize a new polyol mixture for preparation of bio‐based polyurethanes. The chemical synthetic route for reaction of ESO with isopropanolamine was analyzed by ¹H‐NMR. The results suggested that both ester groups and epoxy groups in ESO had reacted with amino group of isopropanolamine through simultaneous ring‐opening and amidation reactions. Epoxy groups in various situations exhibited different reactivity, and the unreacted epoxy groups were further opened by hydrochloric acid. The synthesized polyol mixture had high hydroxyl number of 317.0 mg KOH/g. A series of polyurethanes were prepared by curing the synthesized polyol mixture with 1,6‐diisocyanatohexance along with different amount of 1,3‐propanediol (PDO) as chain extender. Tensile tests showed that yield strengths of the polyurethanes ranged from 2.74 to 27.76 MPa depending on the content of PDO. Differential scanning calorimetry analysis displayed one glass transition temperature in the range of 24.4–28.7°C for all of the polyurethane samples, and one melt peak at high content of PDO. Thermogravimetric analysis showed that thermal degradations of the polyurethanes started at 240–255°C. In consideration of simple preparation process and renewable property of ESO, the bio‐based polyurethane would have wide range of applications. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013     

深化内部改革 做强主营经济 开拓发展空间

本文通过对滨海县盐业有限公司近几年来的发展历程／成功经验的回顾与总结,以及面临盐业体制改革形势存在的问题的剖析,浅述滨海公司如何应对形势变化,解放思想,锐意改革,走出一条具有特色的转型发展之路。     

Correlation between clothing air gap space and fabric mechanical properties

To investigate the distribution of clothing air gap layers, clothes with the same pattern but different fabrics were put on a standard scan model. The [TC]² NX-16 three-dimensional (3D) body scanning technique was used to collect point cloud data and the overall 3D visualization model of clothing air gaps was represented in a novel way through computer graphics processing. The volumes of air gap space were calculated. The main fabric mechanical properties were investigated and the relationship among them was analyzed by stepwise regression. The results demonstrated a close relationship between clothing air gap space and fabric mechanical properties. The volumes of air gap space were significantly positively correlated with stiffness-bending length and warp density and significantly negatively correlated with drape-crest angle uniformity. The conclusion could play a role in predicting and controlling the clothing design process, especially the material design process of clothing.     

A Short-Term Forecasting Algorithm for Network Traffic Based on Chaos Theory and SVM

Recently, the forecasting technologies for network traffic have played a significant role in network management, congestion control and network security. Forecasting algorithms have also been investigated for decades along with the development of Time Series Analysis (TSA). Chaotic Time Series Analysis (CTSA) may be used to model and forecast the time series by Chaos Theory. As one of the prevailing intelligent forecasting algorithms, it is worthwhile to integrate CTSA and Support Vector Machine (SVM). In this paper, after the vulnerabilities of Local Support Vector Machine (LSVM) in forecasting modeling are analyzed, the Dynamic Time Wrapping (DTW) and the “Dynamic K” strategy are introduced, as well as a short-term network traffic forecasting algorithm LSVM-DTW-K based on Chaos Theory and SVM is presented. Finally, two sets of network traffic datasets collected from wired and wireless campus networks, respectively, are studied for our experiments.     

基于感性工学的木材山峰状纹理视觉特性研究

本文基于感性工学的原理,通过问卷调查的形式对具有喜欢印象的20个木材山峰状纹理进行视觉心理量语意词汇调研,用聚类分析法进行分析,得出三类视觉心理量所对应的词汇。同时对这20个山峰状纹理用游标卡尺、角度测量仪等工具进行纹理间距、纹理粗细、纹理周期等进行视觉物理量测量,得出的结论与数视觉心理量对比分析,从而得出木材山峰状纹理的视觉特性的一般规律。     

Ultrasonic-thermostatic-assisted cloud point extraction coupled to high-performance liquid chromatography for the analysis of adrenalines residues in milk

A novel approach, ultrasonic-thermostatic-assisted cloud point extraction (US-CPE) combined with high-performance liquid chromatography and ultraviolet detection, is developed for the analysis of adrenalines (beclometasone dipropionate, hydrocortisone butyrate and nandrolone phenylpropionate) in milk samples. It is based on the induction of micellar organized medium by using a non-ionic surfactant TMN-6 (polyether-type organic silicon surfactant; structure: (CH₃)3C(CH₂)8(OC₂H₄)XOH; average of X = 6) to extract the target adrenalines. In this experiment, phase diagrams were used to study the cavitation and mass transfer behaviors of the two phases on micelles of TMN-6. The main advantages of this system were that it had no ultraviolet absorption and had higher extraction efficiency. In addition, the phase diagram of US-CPE was determined contrast with ultrasonic-thermostatic-cloud point system. The effects of other operating parameters, e.g., concentration of salt and centrifugation time on extraction of US-CPE system, have also been studied in detail.     

模糊控制智能开发系统

本文介绍了模糊控制智能化开发系统，包括：模糊控制原理，基于计算智能（人工神经网，遗传算法）的模糊规则自动生成的方法，系统的功能和界面等。     

A combinatorial characterization of regular anonymous perfect threshold schemes

The notion of a regular anonymous perfect threshold scheme is introduced, and a combinatorial characterization for such a (2,w)-threshold scheme in terms of a regular difference family is given.