A New Grade Carbon Black Produced by Thermal Plasma Process

This paper presents a new route about producing carbon black,by wich the natural gas cracking is carried out in the absence of oxygen thanks to an electric energy supply externally given by a plasma jet.The carbon black produced by this process has a narrow size distribution and a small average diameter of 38nm as well as a highly branched aggregate.The higher DBP value of 1.40ml/g shows it should be a high structure carbon black.The FTIR spectra shows that there are lots of aromatic c-c bonds and a large amount of nitrogen-coutaining functional groups on the carbon blacks surface,such as-NH,-CN as we3ll as -CH,-OH,-COOH groups.     

汽拖AV40-11轴流压缩机组在广钢420m3高炉上的应用

本文主要介绍了广钢汽拖AV40-11轴流压缩机组的结构和特点，控制系统概要、应用效果。     

Performance of N95 elastomeric respirators in high humidity and high coal dust concentration environmentOA

High humidity and high dust concentration in deep coal mines may severely challenge the performance of respirators worn by coal miners.This paper aims at quantitatively evaluating the respirators used in deep coal mines and providing scientific guidance for the respiratory protection of miners.Based on the self-designed in-situ PM_2.5collector,controllable PM_2.5generator,human breathing simulator,and respirator simulation testing system,under the simulated deep mine working ...     

膨胀土地区开挖渠道滑坡的规律与特征

在安徽省近百处开挖渠道滑坡分析的基础上,结合工程地质条件,对膨胀土地区开挖渠道滑坡在滑动面的形态及其形成、滑坡过程和滑坡分布等方面的规律和特征进行了研究。     

Modeling and finite element analysis of rod and wire steel rolling process

Two thermomechanical coupled elastic-plastic finite element （FE） models were developed for predicting the 12-pass continuous rolling process of GCrl 5 rod and wire steel. The distances between stands in the proposed models were set according to the actual values, and the billets were shortened in the models to reduce the calculation time. To keep the continuity of simulation, a technique was developed to transfer temperature data between the meshes of different models in terms of nodal parameters by interpolation functions. The different process variables related to the rolling process, such as temperature, total equivalent plastic strain, equivalent plastic strain rate, and contact friction force, were analyzed. Also, the proposed models were applied to analyze the reason for the occurrence of an excessive spread in width. Meanwhile, it was also utilized to assess the influence of the roll diameter change on the simulated results such as temperature and rolling force. The simulated results of temperature are found to agree well with the measured results.     

西门子6RA70全数字直流调速装置在舞钢的应用

本文论述了西门子6RA70装置在双边剪夹送辊传动系统中的应用，解决了夹送辊不同步而出现的钢板走偏问题。     

地埋管地源热泵水系统的若干问题研究

结合调研测试的实际工程,根据实际工程中地埋管地源热泵系统中水系统的形式及特点,归纳了设计、运行管理、设备故障等几个方面的水系统常见的问题。探讨了地埋管地源热泵水系统的设计问题,指出某些工程水系统存在的问题及解决思路;分析水系统故障的原因及表现,通过对水系统运行状态的观察与测试,从机组COP及系统能效比的角度分析水系统故障的影响：对于运行管理方面,提出相应的水系统形式的运行建议,为优化地埋管地源热泵的设计及运行管理提供了相应参考。     

Decreased Expression of Plakophilin-2 and αT-Catenin in Arrhythmogenic Right Ventricular Cardiomyopathy: Potential Markers for Diagnosis

Arrhythmogenic right ventricular cardiomyopathy (ARVC) is a hereditary disease of the heart muscle. Clinical challenges remain, however, in identifying patients with ARVC in the early or concealed stages with subtle clinical manifestations. Therefore, we wanted to identify potential targets by immunohistochemical (IHC) analysis in comparison with controls. Pathogenic mutations were identified in 11 of 37 autopsied patients with ARVC. As observed from IHC analysis of the RV, expression of αT-catenin and plakophilin-2 is significantly decreased in autopsied patients with ARVC as compared to controls, and the decreased expression is consistent in patients with and without pathogenic mutations. Furthermore, ARVC specimens demonstrated a reduced localization of αT-catenin, desmocollin-2, desmoglein-2, desmoplakin, and plakophilin-2 on intercalated discs. These findings have been validated by comparing RV specimens obtained via endomyocardial biopsy between patients with ARVC and those without. The pathogenic mutation was present in 3 of 5 clinical patients with ARVC. In HL-1 myocytes, siRNA was used to knockdown CTNNA3, and western blotting analysis demonstrated that the decline in αT-catenin expression was accompanied by a significant decline in the expression of plakophilin-2. The aforementioned effect was directed towards protein degradation rather than mRNA stability. Plakophilin-2 expression decreases concurrently with the decline in CTNNA3 expression. Therefore, the expression of αT-catenin and plakophilin-2 could be potential surrogates for the diagnosis of ARVC.     

Influence of the copper ion on aging rate of oil-paper insulation in a power transformer

To identify the influence of copper ion on the aging rate of oil-paper insulation, accelerated thermal aging experiments on oil-paper insulation were designed and performed at two significant temperatures. A set of characteristic parameters, including dissolved gases, degree of polymerisation, furfural content, water content and acid number of oil, was tested. The experiments- results reveal that copper ion has a different influence on insulation paper and oil during the aging process of the insulation system. On the one hand, it delays the degradation of insulation paper, reducing the ratio of CO₂/CO by about 11% at 80%C and by more than 50% at 130%C. On the other hand, copper ion promotes the oxidation of oil and thus accelerates the aging rate.