钢渣的综合利用

钢渣是炼钢工业的副产品。细述了钢渣的理化特性,并介绍钢渣在筑路、烧结矿、水泥、建材和农业等领域的综合利用。     

螺管电磁阀高速开关动特性的改进方法

本文讨论并分析了影响螺管电磁阀动态特性的机械结构因素,提出了一种改进机械结构及改善电磁阀动态特性的方法,并介绍了工程应用实例。     

对切削提升系统的改造

本文对切削机的液压传动控制过程进行分析,对切削机存在的问题提出了改进措施。     

复合支护技术在软岩段巷道中的应用

本文针对花园煤矿开拓巷道中遇到的软岩具有松散破碎、高饱和吸水性、强膨胀性及流变性等的特点,分析研究了巷道支护失效的原因,在现场施工中采用了多种复合支护方式,保证了工程支护质量和施工安全,特别是在轨道大巷应用施工中取得了良好的支护效果。     

Impact of Informatization on Macro Economy and Finance in China

The process of Informatization will have great impact on both macro economy and finance. In the respect of macro economy, informatization influences short-term economic fluctuation, the growth of total economic scale and economic structure in China. Firstly, it will influence short-term economic fluctuation by affecting labor market, pricing fluctuation, short-term investment and consumption, as well as the implementation of macroeconomic policy. Meanwhile, it will boost long-term economic growth by providing new production factors, upgrading production efficiency and pushing technology innovation. In addition, it will change economic structure by impacting industry structure, demand structure and regional structure. On the perspective of finance, informa-tization has changed the monetary form and function, which is the technological foundation of virtual currency and electronic payment. It exerts an extensive and far-reaching impact on the financial institutions, financial mar-ket, financial supervision and regulation through two ways: decreasing the transaction costs and alleviating the asymmetric information problems.     

Quantitative analysis of micro structural and conductivity evolution of Ni-YSZ anodes during thermal cycling based on nano-computed tomography

Understanding the mechanism of degradation in solid oxide fuel cells (SOFCs) using nickel/yttria-stabilized zirconia (Ni-YSZ) as the anode material is very important for the optimization of cell performance. In this work, the effects of thermal cycling on the microstructure of the Ni-YSZ anode are explored using the three-dimensional X-ray nano computed tomography (nano-CT) imaging technique. It is found that the average Ni particle size increased with thermal cycling, which is associated with the decreased connectivity of the Ni phase and the three-phase-boundary (TPB) length. Moreover, the conductivities of the anode samples are also reduced with the increase in thermal cycle times. The implication of these observations is discussed in terms of the relationship between the conductivity and connectivity of the Ni phase.     

Transient response of high temperature PEM fuel cell

A transient three-dimensional, single-phase and non-isothermal numerical model of polymer electrolyte membrane (PEM) fuel cell with high operating temperature has been developed and implemented in computational fluid dynamic (CFD) code. The model accounts for transient convective and diffusive transport, and allows prediction of species concentration. Electrochemical charge double-layer effect is considered. Heat generation according to electrochemical reaction and ohmic loss are involved. Water transportation across membrane is ignored due to low water electro-osmosis drag force of polymer polybenzimidazole (PBI) membrane. The prediction shows transient in current density which overshoots (undershoots) the stabilized state value when cell voltage is abruptly decreased (increased). The result shows that the peak of overshoot (undershoot) is related with cathode air stoichiometric mass flow rate instead of anode hydrogen stoichiometric mass flow rate. Current is moved smoothly and there are no overshoot or undershoot with the influence of charge double-layer effect. The maximum temperature is located in cathode catalyst layer and both fuel cell average temperature and temperature deviation are increased with increasing of current load.     

Design and performance evaluation of a haptic interface based on MR fluids for endovascular tele-surgery

Microsystem Technologies - In this paper, a magnetorheological (MR) fluids based haptic interface has been developed in master site to provide the haptic sensation to the interventionalist during...     

Comparison of gamma irradiation and heating treatment on cytotoxicity,insulinotropic activity,and molecular structure change of mistletoe viscothionin

Food Science and Biotechnology - Mistletoe offers health-promoting effects; however, it has toxicity, requiring careful application. Viscothionin is a polypeptide of mistletoe that while...     

大型炼化一体化项目环保三同时的探讨

对千万吨级的大型石油化工炼化一体化项目环境保护三同时管理工作中的管控工作内容进行了阐述,分别对设计期的设计理念选用,建设期既要管好建设又要做好生产准备工作,及投产使用期重要工作项内容的三个不同阶段的三同时主要工作内容进行了相关的说明,为类似的大型石油化工建设项目的环境保护三同时管理提供工作参考和工作借鉴。