核岛环吊安装重难点介绍

本文对核岛环吊安装重难点作具体介绍，为后续环吊安装提供更多经验及解决方案。     

莱钢烧结机废气余热回收利用实践

莱钢3×265m^2烧结机成功设计安装以热管为主要传热元件的余热回收装置,将环冷高温段废气转化为热蒸汽并应用于生产和生活;中温段热废气通过热风罩引入烧结料面,采用环冷机安装平料器、改进密封方式、改造烧结机布料系统、优化工艺操作参数以改善料层透气性等一系列措施,充分利用烧结矿显热资源实现了热风烧结。废气余热的回收利用,大大降低了烧结工序能耗,减少了热源排放,经济效益和环保效益显著。     

复合硬质合金辊环的应用

介绍了棒材成品精轧机组复合硬质辊环的牌号选择、安装、轧槽加工、辊环冷却以及保存等方面应用经验。     

铝板带冷轧机液压系统的污染控制与管理

通过介绍铝板带冷轧机液压系统的污染控制,从元件管理、系统维护、系统安装、油品管理检测等几方面入手,控制系统污染,提高系统工作可靠性,延长系统元件使用寿命。     

洗涤塔AG元件安装技术

主要介绍了德国PW公司所生产的煤气环缝洗涤系统的安装过程,该系统提前完成安装调试,并被德国专家一次验收通过,为该类型系统的安装积累了经验.     

金隆工程闪速炉冷却装置的设计

通过铜陵金隆铜冶炼工程闪速炉冷却装置的 介绍，对该炉冷却方式的选用、冷却元件的设计及其布置和 安装进行了论述。     

大型环冷机台车及轨道的安装

介绍了邯钢435m2烧结工程大型环冷机台车及轨道的安装步骤、质量控制注意事项,生产实践表明,这套设备的安装过程是成功的。     

高速线材轧机碳化钨辊环新型安装方式的研究

本文介绍了一种新型的高速线材轧机辊环的安装方式,结构简单、拆卸容易,改善了辊环的应力状态,可使孔型寿命提高一倍以上。     

闪速炉冷却元件的结构与设计

本文阐述了冷却元件在闪速熔炼炉上的作用和冷却元件的安装位置,以及冷却元件的结构形式     

表面测温技术在焦油蒸馏中的应用

通过探讨表面测温的工作原理和测温元件的安装方法,介绍了非接触式表面测温方法,在精度上和稳定性上均满足了生产要求,具有较好的推广价值。     

浅析《野草》的版画特征

鲁迅先生一生热爱美术作品,对版画中木刻兴趣尤甚.<野草>作为其"写心之作",亦呈现出一些与木刻版画一致的审美特征:一是具有木刻版画的色彩特征,多对比、多冷色,有阴郁的美感;二是具有木刻版画的力度特征,环境描写、人物刻画处处刀锋毕现,遒劲有力,有一种"力之美".     

45号钢钢水洁净度的控制研究

南钢45号钢的主要问题是铸坯和轧材裂纹率高,轧材易在热墩或热墩后的机加工过程中出现不同程度的开裂。究其原因是由于钢中大量的氧化物和硫化物夹杂使得其塑性、韧性及疲劳强度降低、加工性能变坏所致。因此,通过控制转炉终点碳质量分数和出钢过程温度、增加软吹氩时间、在LF炉中提前造白渣以及加强保护浇注等措施,降低了45号钢钢中夹杂物的数量,有效的避免了加工开裂。     

Independent integration of the 300 t BOF of Zhanjiang in heritage of steelmaking technologies of Baosteel

Through summary and extraction of current steelmaking design,process and equipment technologies and production technologies for 300 t grade converters in Baosteel,the article analyzes and elaborates the significance of independent integration of 300 t grade converters in Zhanjiang,major targets of the independent integration in converter process technologies,equipment packages and controls,the innovated critical technologies and comparison with overseas advanced technologies,major technical difficulties in the integration in Baosteel and their solutions,as well as general mindset and final objectives of the project.The total integration of technology for Shanghai No.1 Steel Making Plant of Baosteel was undertaken by Nippon Steel.And Kawasaki Steel was responsible for the total integration of technology for 4# and 5# converters of Shanghai No.2 Steelmaking Plant of Baosteel.Based on digestion,absorption and innovation of the introduced technologies,Baosteel has firstly achieved the independent integration of 6# converter,5# RH and 3# LF projects in the Shanghai No.2 Steelmaking Plant of Baosteel.Therefore, Baosteel shall take advantages of the favorable conditions and experiences and advanced steel making technologies of Baosteeel to master the imported new steelmaking technologies in the world and then form the advanced complete set steel making technologies and equipment at home and abroad.The achievement of independent integration of Zhanjiang Steel Making Project will make the breakthrough for the construction of large - sized steel making plant in Baosteel.300 t converter technology integration is undertaken by Baosteel independently in instead of by the foreign side in the past.     

Effects of Train Characteristics on the Rate of Deterioration of Track Roughness

Track roughness describes in part the up and down waves in the longitudinal geometry of a railway track. A train passing over rough track experiences a degree of bouncing that generates oscillations in the forces exerted by the train’s wheels on the top of the rail, which in turn cause this roughness to worsen. The rate at which the track roughness deteriorates depends on the response of the track to the weight of the train and to the dynamic oscillations in wheel/rail forces, which in turn are affected by the properties of the train vehicles’ components and the speed of the train. The paper develops relationships between the severity of track roughness and the dynamic wheel/rail forces generated by a moving train using field data, and between those forces and the specific vehicle characteristics of speed, total mass, unsprung mass, suspension stiffness, and damping, using NUCARS simulations. These two relationships in turn are combined to show how the speed of the train and the design of the train vehicle’s bogie suspension can worsen or improve the rate of deterioration of track roughness. The relationships also provide a firm basis for the owner of track to set more representative charges levied on the train operator for using the track.     

The accuracy of parental recall of aspects of child development and of child rearing practices.

Retrospective accounts of child rearing obtained from parents of 3-year-olds were compared with reports they previously gave in the course of a longitudinal study begun with the birth of the child. The parents were quite inaccurate in their memory of details about child rearing practices and early development progress, in spite of the frequent rehearsal of these data due to their participation in the longitudinal study, and in spite of the relatively young age of the children. In-accuracies were greatest for items dealing with the age of weaning and toilet training, the occurrence of thumbsucking, and demand feeding. Inaccuracies tended to be in the direction of the recommendations of experts in child rearing, especially on the part of the mothers. In general, mothers recalled more correctly than fathers. (20 ref.) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Initiation of Motion of Calcareous Sand

This paper examines the initiation of motion of four natural and five sieved calcareous sand samples in unidirectional flow. Flume experiments yield the sediment transport rate as a function of bed shear stress up to bed-form development. Reference-based criteria are supplemented by visual observations to determine the critical shear stress. The results are compared with published data for rounded and irregular particles in terms of the median sieve size and the corresponding nominal and equivalent diameters as functions of particle Reynolds number. The comparison shows that the critical shear stresses of the irregular particles are higher than the Shields curve in the hydraulically smooth flow regime and lower in the rough turbulent flow regime.     

Assessment of Performance of Seismic Isolation System of Bolu Viaduct

The Bolu viaduct is a 2.3-km-long seismically isolated structure that was nearly complete when it was struck by the 1999 Duzce earthquake in Turkey. It suffered complete failure of the seismic isolation system and narrowly avoided total collapse due to excessive superstructure movement. This paper presents an evaluation of the design of the viaduct’s seismic isolation system and an assessment of its performance in the Duzce earthquake. Evaluation of the seismic isolation system’s design has revealed that it did not meet the requirements of the AASHTO Guide Specifications for Seismic Isolation Design. Analysis of the viaduct with motions scaled in accordance with the AASHTO Guide Specifications resulted in a displacement demand of 820 mm, which is far more than the 210 mm displacement capacity of the existing isolation system. Analysis of the viaduct for a simulated near-fault motion with characteristics consistent with the site conditions resulted in an isolation system displacement demand of 1,400 mm. This indicates that, even if the isolation system had been designed in compliance with the AASHTO, it would have still suffered damage in the earthquake.     

关于黄金地质勘探技术装备水平的思考

通过分析国内外地质勘探技术装备水平的现状,针对我国黄金行业地质勘探技术装备水平相对落后而制约了黄金工业发展的局面,提出了提高黄金地质勘探技术装备现代化水平应具备的有利条件。     

矿化空间的有序性与矿体定位预测——以山东乳山地区石英脉型金矿为例

以山东乳山地区石英脉型金矿为例 ,探讨了一些矿化空间有序性规律在矿体定位预测中的应用 ,乳山地区石英脉型金矿可分为乳山式和铜岭式 2种类型。其中乳山式金矿分布于 4条陡倾的 NNE向左行右阶式压扭性断裂带上 ,矿体定位受 NNE及 NE向断裂的联合控制 ,具 NNE向成带、NE向成行的特点 ,沿同一控断裂带上分布的相邻金矿床 ,其矿体侧伏方向是相反的。利用这种矿化空间分布的有序性规律 ,在老青—小青地区发现了金矿体。在矿体数学特征研究方面 ,根据初家沟金矿一号矿体的品位和厚度变化趋势分析 ,研究并发现了采空区下部的隐伏矿体。