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。     

韶钢道口自动报警装置获专利

韶钢道口自动报警装置获专利最近，国家专利局正式批准，广东韶钢集团公司研制的“铁路平交道口自动报警装置”获得发明专利权。该装置是韶钢运输部助理技师罗东元于１９９１年发明的，经几年来在韶钢的１６处道口应用，证明其有结构简单、易装、易用、易维修、易维护、投...     

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。     

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。     

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。     

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.     

LED发光体在运输厂的运用

随着发光源的发展以及LED发光体在照明系统中的应用，传统使用的普通灯已不能适应节能减排的要求。本文讨论了LED的结构、原理和特点，结合铁路道口的情况，采用LED取代白炽灯，获得了较好的安全、节能和环保效果。     

钢轨道口的研制与应用

文章重点介绍了钢轨制作道口铺面在铁路平交道口上的设计和应用情况。经使用证明,该种道口能够完全满足目前重载汽车的运输要求,结构合理、整体性强、使用寿命长、安装维修便捷,具有极大的经济效益和良好的社会效益。     

首钢29号大道口改造方案的设计

通过统计29号大道口各种车型的流量，流向和火车占用在道口的时间，分析交叉口主要道路，次要道路的结构和各个车道的特点，测量交织段道路，车辆进口，出口等宽度，设计出了科学有效的交通口规划管理方案。     

Implementation of a Long-Term Bridge Weigh-In-Motion System for a Steel Girder Bridge in the Interstate Highway System

This technical paper discusses the implementation of a long-term bridge weigh-in-motion system for use in determining gross vehicle weights of trucks crossing steel girder bridges. The system uses strain data to determine truck weights using an existing structural health monitoring system installed on a interstate highway bridge. The applied system has the advantage of not using any axle detectors in the roadway; and instead all analyses are performed using strain gauges attached directly to the steel girders, providing for a long-term monitoring system with minimal maintenance. Long-term data has been used to demonstrate that this method can be readily applied to gain important information on the quantity and weights of the trucks crossing the highway bridge.     

Clinical implications and possible association of malposition of the branch pulmonary arteries with DiGeorge syndrome and microdeletion of chromosomal region 22q11

We describe a series of 10 patients with malposition of the branch pulmonary arteries (4 patients with crossing [crossed pulmonary arteries] and 6 patients without crossing), 2 of whom had a short main pulmonary artery segment that resulted in iatrogenic right pulmonary artery stenosis after pulmonary artery band placement. DiGeorge syndrome was seen in 5 patients and 4 had microscopic deletion of chromosomal region 22q11.     

Canadian psychology: Some social and applied emphases.

Recent concern with national identity has motivated an examination of possible relationships between features of Canadian society and the nature of applied and social Psychology. Experience with the production of a bibliography and book of readings in this area provided the background, necessary for a detailed discussion of the issues. A matrix of research questions was elaborated by crossing some special features of social and cultural life in Canada with the sub-disciplines of Social, Clinical, Educational and Work Psychology. It was concluded that there could be "a Canadian Psychology" in these social and applied areas, but that considerable effort is required before it is attained. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

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.     

Blue rubber bleb nevus syndrome

In the presence of an internal mammary artery graft crossing the mid-sternal line, a median sternotomy may jeopardize the graft and consequently bring a hemodynamic compromise. We describe a case of successful radical pericardiectomy for postoperative constrictive pericarditis using a "T-shaped" thoracotomy in a 68-year-old male patient who had a right IMA graft to the left anterior descending coronary artery.     

Management of childhood splenic trauma--the Jos experience

We studied retrospectively 22 children who were managed for splenic injuries at Jos University Teaching Hospital between September 1988 and October 1995. Sixteen were males and six were females (M:F = 2.7:1) with their ages between five and 15 years and a mean of 10.3 years. Eleven were knocked down by vehicles while crossing the freeway, playing or hawking goods; seven fell from slippery mango trees after a downpour of rain while two were passengers in a vehicle that was involved in a head-on collision and another two were kicked in the abdomen as a result of assault. All had surgery. Four sustained Uphadhyaya and Simpson's Type 1 injuries while six sustained Type IV injuries. Twelve had total splenectomy, seven had total splenectomy with heterotopic autotransplantation of splenic wafers while three had splenorrhaphy augmented with omentoplasty. An average of 1.5 units of blood per patient were transfused. There was only one death. Considering that the majority (18) of these children sustained their splenic injuries while crossing the freeway (playing or hawking goods) and from falls from mango trees after the rains, we believe that there are preventable causes. Mandatory primary and junior secondary school education as well as legislature against child labour will help keep these children safe out of harm's way and thus drastically reduce the incidence of childhood splenic injuries in our environment.     

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.     

Nonlinear Analysis of Ordinary Bridges Crossing Fault-Rupture Zones

Rooted in structural dynamics theory, three approximate procedures for estimating seismic demands for bridges crossing fault-rupture zones and deforming into their inelastic range are presented: modal pushover analysis (MPA), linear dynamic analysis, and linear static analysis. These procedures estimate the total seismic demand by superposing peak values of quasi-static and dynamic parts. The peak quasi-static demand in all three procedures is computed by nonlinear static analysis of the bridge subjected to peak values of all support displacements applied simultaneously. In the MPA and the linear dynamic analysis procedures, the peak dynamic demand is estimated by nonlinear static (or pushover) analysis and linear static analysis, respectively, for forces corresponding to the most-dominant mode. In the linear static analysis procedure, the peak dynamic demand is estimated by linear static analysis of the bridge due to lateral forces appropriate for bridges crossing fault-rupture zones. The three approximate procedures are shown to provide estimates of seismic demands that are accurate enough to be useful for practical applications. The linear static analysis procedure, which is much simpler than the other two approximate procedures, is recommended for practical analysis of “ordinary” bridges because it eliminates the need for mode shapes and vibration periods of the bridge.     

Task effects on tactile temporal order judgments: When space does and does not matter.

The ability to report the temporal order of 2 tactile stimuli (1 applied to each hand) has been shown to decline when the arms are crossed over compared with when they are uncrossed. However, these effects have only been measured when temporal order was reported by stimulus location. It is unknown whether this spatial manipulation of the body affects all tactile temporal order judgments (TOJs) or only those judgments that are spatially defined. The authors examined the effect of crossing the arms on tactile TOJs when stimuli were identified by either spatial (location) or nonspatial (frequency or duration) attributes. Spatial TOJs were significantly impaired when the arms were in crossed compared with uncrossed postures, but there was no effect of posture when order was judged by nonspatial attributes. Task-dependent modulation of the effects of posture was also evident when response complexity was reduced to go/no-go responses. These results suggest that crossing the arms impairs tactile localization and thus spatial TOJs. However, the data also suggest that localization is not a necessary precursor when temporal order can be computed by nonspatial means. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Thermodynamic volume cycles for electron transfer in the cytochrome c oxidase and for the binding of cytochrome c to cytochrome c oxidase

Determining the way in which deleterious mutations interact in their effects on fitness is crucial to numerous areas in population genetics and evolutionary biology. For example, if each additional mutation leads to a greater decrease in log fitness than the last (synergistic epistasis), then the evolution of sex and recombination may be favored to facilitate the elimination of deleterious mutations. However, there is a severe shortage of relevant data. Three relatively simple experimental methods to test for epistasis between deleterious mutations in haploid species have recently been proposed. These methods involve crossing individuals and examining the mean and/or skew in log fitness of the offspring and parents. The main aim of this paper is to formalize these methods, and determine the most effective way in which tests for epistasis could be carried out. We show that only one of these methods is likely to give useful results: crossing individuals that have very different numbers of deleterious mutations, and comparing the mean log fitness of the parents with that of their offspring. We also reconsider experimental data collected on Chlamydomonas moewussi using two of the three methods. Finally, we suggest how the test could be applied to diploid species.