钢厂铁路运输无人化道口安全监控

钢厂的铁路道口经历了多次升级，由原来道口现场有人值守道口，改为道口现场无人值守的远程集控；再由远程人工操作、自动监控、升级到道口智能化自动运行；实现无人化道口安全监控，为钢厂铁路运输自动驾驶、运输过程无人化奠定基础，保障运输列车通过道口时安全畅通；无人化道口是钢厂铁路无人化运输系统中不可缺少的重要环节。     

橡胶道口板的应用与分析

对钢筋砼道口板铺制的传统式铁路平交道口和新式橡胶道口各自的特点进行了分析，介绍了橡胶道口板在莱钢的应用。     

浅探莱钢铁路道口问题及对策

铁路道口是事故多发地点，针对莱钢铁路道口在安全管理上存在的问题，提出互动互控共同负责管理模式，营造规范的铁路道口行车次序和良好的道口交通环境，减少道口事故，确保安全生产。     

铁路道口铺面安全分析与对策

从厂内铁路道口铺面现状谈起,对铁路道口故障影响因素进行分析;结合厂区道口现状重点阐述铺面材质的利弊和改进效果。目的就是从根本上减少铁路道口铺面设备的故障率,从而确保铁路道口铺面区域内的行车安全。     

铁路橡胶道口板的分析与应用

对钢筋混凝土道口板铺制的传统式铁路平交道口和新式橡胶道口各自的特点进行了分析，介绍了橡胶道口板在莱钢的成功应用。     

整体道口板在营口中板厂的应用

针对营口中板厂道口的现状,分析造成道口病害的原因。经过方案比选,选择并介绍一种适合钢铁企业重载交通的道口形式——整体道口板,并详细分析其设计特点及施工要点。     

本钢铁路道口远程集控系统的改造

利用远程网络技术对有人值守道口进行改进,成为解决道口问题的一个有效措施,实现了值班人员在调度指挥区域对多个道口进行远程集中控制。但是该系统在使用中也出现了运行操作与维护检修方面的一些问题,本文针对这些问题进行了研究并进行了低成本改造,取得了很好的效果。     

冶金企业铁路道口自动信号系统的应用

根据冶金企业铁路线路、运输组织方式、道口设置的特点,分析比较现有几种点式传感器铁路道口自动信号系统的不同特性,结合实际工程的设计、施工,对有源传感器铁路道口自动信号系统的应用进行分析、探讨。     

重载铁路道口维修技术探讨

重载化公路铁路平交道口具有载重大、过车频繁、维修频率高的特点。在维修过程中由于需要向公路和铁路两个管理单位要点施工,对行车干扰较大。对传统维修工艺进行改进,以提高道口使用寿命为出发点,提高了道口抗冲击性和稳定性,减小载重车及超载机动车辆对道口的破坏。     

钢铁厂厂区铁路道口设计方案的选择

论述了铁路道口的几种设计方案及其比较，．认为液压传动道口安全装置在北方寒冷地区不宜使用.     

加强自主创新能力建设 推进钢铁产品结构优化

安钢集团公司已形成千万吨钢的生产能力，为进一步提高在日益加剧的钢铁市场竞争中的优势地位，明确提出了以加快建设千万吨精品板材基地为目标的“两大跨越”发展战略。本文结合近年来企业技术创新体系建设和产品结构调整经验，对进一步完善自主创新运行机制和推进钢铁产品结构优化进行了探讨，论述了自主创新体系建设的基本思路、结构框架和奋斗目标；围绕“两大跨越”发展战略的实施，提出了钢铁产品结构调整优化的基本构思。     

加热炉燃烧控制系统

本文介绍了在攀钢热轧板厂两座加热炉上成功使用的燃烧控制系统，对核心环节双交叉限幅串级比例控制原理予以了详细说明，作为成功范例，值得推广。     

Effects of roll crossing on the rolling process in four-high mills

Roll crossing can be utilized as a method for profile and flatness control in a rolling mill. The estimation of the profile adjusting range by calculating the elastic roll-gap deflection reveals that roll crossing has a similar effect on the profile as positive bending. Under the assumptions made in the calculations roll crossing is an effective method as profile and crown actuator. Furthermore the effect of roll crossing on the flatness is qualitatively confirmed by rolling trials. Beyond the investigation of the effectiveness of roll crossing as profile and flatness actuator a 3-dimensional finite element simulation of the material flow in the roll gap was done. The results of these simulations, which were confirmed by rolling trials as well, showed that the rolled specimen warps out of the passline due to the crossing of the work rolls whereas the influence of roll crossing on the distribution of local plastomechanical values is negligible. Force components in axial direction are induced by crossing the rolls, which have to be compensated by additional bearings. For the determination of the amount of axial forces rolling trials on a laboratory four-high mill were carried out.     

Determination and analysis of antigenic epitopes of prostate specific antigen (PSA) and human glandular kallikrein 2 (hK2) using synthetic peptides and computer modeling

In comparison with pyeloplasty, endourologic procedures for the treatment of ureteropelvic junction obstruction offer good success rates with less morbidity and a shorter hospitalization; however, studies have found lower success rates and increased complications in patients with crossing vessels. Conventional diagnostic angiography and intravenous urography have both been used to identify crossing vessels at the UPJ; but, a reliable, less invasive, less costly, and simpler preoperative procedure to identify crossing vessels is needed. Helical CT with CT angiography is a promising noninvasive technique for the identification of crossing vessels at the ureteropelvic junction, which can be used for surgical planning of endourologic treatment of UPJ obstruction.     

Examining the impact of traffic environment and executive functioning on children's pedestrian behaviors.

The process of integrating visual information and planning a safe crossing is cognitively demanding for many young children. We assessed relations between traffic characteristics, aspects of children's executive functioning (EF), and pedestrian behavior, with the aim being to determine whether well-developed EF would predict safer pedestrian behaviors beyond the contributions of child demographic and traffic environment factors. Using the pretend road method, we studied a sample of 83 children aged 6–9 in a series of 5 crossing trials beside a real road in response to actual traffic conditions. Traffic characteristics and pedestrian behaviors were observed and measured across crossing trials. Both traffic characteristics and EF, most notably cognitive efficiency, were strongly related to children's pedestrian crossing behaviors. Traffic characteristics were also found to interact with children's ability to monitor their crossing performance. Examining developmental influences in pedestrian injury etiology broadens researchers' knowledge of and ability to prevent injuries by moving beyond describing what happens to children and examining why pedestrian injuries occur. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Three electronic state model of the primary phototransformation of bacteriorhodopsin

The primary all-trans --> 13-cis photoisomerization of retinal in bacteriorhodopsin has been investigated by means of quantum chemical and combined classical/quantum mechanical simulations employing the density matrix evolution method. Ab initio calculations on an analog of a protonated Schiff base of retinal in vacuo reveal two excited states S1 and S2, the potential surfaces of which intersect along the reaction coordinate through an avoided crossing, and then exhibit a second, weakly avoided, crossing or a conical intersection with the ground state surface. The dynamics governed by the three potential surfaces, scaled to match the in situ level spacings and represented through analytical functions, are described by a combined classical/quantum mechanical simulation. For a choice of nonadiabatic coupling constants close to the quantum chemistry calculation results, the simulations reproduce the observed photoisomerization quantum yield and predict the time needed to pass the avoided crossing region between S1 and S2 states at tau1 = 330 fs and the S1 --> ground state crossing at tau2 = 460 fs after light absorption. The first crossing follows after a 30 degrees torsion on a flat S1 surface, and the second crossing follows after a rapid torsion by a further 60 degrees. tau1 matches the observed fluorescence lifetime of S1. Adjusting the three energy levels to the spectral shift of D85N and D212N mutants of bacteriorhodospin changes the crossing region of S1 and S2 and leads to an increase in tau1 by factors 17 and 10, respectively, in qualitative agreement with the observed increase in fluorescent lifetimes.     

A model of regulation of crossing over

Very high variability is characteristic of crossing over. A mechanism of crossing-over variation is proposed on the basis of new data obtained by Chadov et al. Variations are believed to be determined by the character of pairing preceding crossing over and the mechanism of transforming contacts into exchanges. Pairing of homologues is assumed to involve consecutive formation of local contacts between them. The onset of this process depends of the chromosome structure. Exchanges appear in contact sites. Determination of crossing-over sites occurs when the contact number in a meiocyte reaches a certain threshold. The number of contacts formed in each chromosome pair by this time can vary. This results in variations of all parameters of crossing over: recombinational length (RL), exchange number per chromosome arm, and interference. The effect of a chromosome aberration on crossing over in aberrant and heterologous chromosome pairs, i.e., the interchromosomal effect on crossing over (IEC) and the mechanisms determining exchange number and interference, are explained on the basis of the proposed model.     

Genetics of adaptive radiation in Hawaiian and Cook Islands species of Tetramolopium (Asteraceae). II. Genetic linkage map and its implications for interspecific breeding barriers

In a study of the genetic mechanisms associated with adaptive radiation in Hawaiian Tetramolopium, a genetic linkage map was constructed in an interspecific cross. A total of 125 RFLP and RAPD markers were mapped into 117 different loci on nine linkage groups for a map length of 665.7 cM. Segregation distortion occurred in 49% of the mapped probes, located primarily in four linkage groups. High percentages of one parental species genotype (Tetramolopium rockii) were recovered in three of these blocks and the second parental species (T. humile) in the remaining block. The high degree of distorted segregation suggests the buildup of internal crossing barriers, even though island plant species are typically characterized as highly cross compatible with few to no internal crossing barriers. This work and a review of previous crossing studies in island plants show that internal (postmating) crossing barriers do exist. The weak crossing barriers have likely been overlooked because the main focus has been on diversification and speciation through adaptation to extremely diverse environments.     

基于首钢6H3C轧机中间辊交叉的理论分析

首钢特钢冷轧厂6H3C冷轧单机架是目前世界上第一台采用中间辊交叉设计思想的轧机。在轧制过程中,中间辊交叉带来极大的轴向力。基于首钢特钢6H3C轧机,采用影响函数法建立轧辊的弹性变形解析模型,分析了交叉角对于辊间压力分布、横向厚度分布以及轴向力的影响规律,解释了过大交叉角产生轴向力无法正常使用的原因,同时也为后续的板形控制手段优化提供理论依据。