先天性肾积水患者的超微结构病理及临床分析

对38例单纯先天性肾积水肾盂输尿管连接部（UPJ）组织作透射电镜观察，结果：其主要超微结构病理改变是平滑肌细胞间有大量胶原料堆组织堆积，平滑肌细胞相互分离，肌细胞本身发育不良，胞膜皱折、锯齿状、指状突起，线粒体肿胀破坏。提示积水的原因是UPJ部位功能性梗阻。     

公路路基填挖交界处不均匀沉降原因及防治

道路填挖交界处出现不均匀沉降,是一个需要加强管理的质量问题。采用水稳定性好的填筑材料和相应的加固措施,可减小不均匀沉降量,保证路基的稳定性,延长道路的使用期限。     

福仕达前舱线束电气盒电路图解

介绍海马福仕达豪华型微型客车的线束部件配置明细,并根据全车线束产品图纸,对前舱线束中电气盒的连接电路作出图解。当车载某电气设备不能正常工作时,本文可以作为参照,便于对连接电器设备的线束电路进行查找及故障的排除。     

富春江航电枢纽通航瓶颈改造方案探讨

钱塘江为浙江省及长江三角洲地区规划重点建设的骨干航道,但富春江航电枢纽船闸的航运"瓶颈"制约现象日益突出.文章对解决该通航瓶颈问题的若干改造方案进行分析探讨,并提出建议实施方案.以满足长远发展的要求.     

莲花L5中央电器盒引脚分析

以1.6L排量的莲花L5轿车所采用的中央电器盒为基准,并结合中央电器盒所对接的7个汽车线束连接器的线色、线径,对中央电器盒的引脚电路及其功能定义做出分析,便于对中央电器盒进行故障排查及维修操作。     

Zn~(2+)对神经肌接头传递的作用

研究了Zn~(2+)对大鼠离体膈神经膈肌标本和小鸡颈二腹肌标本的作用。实验结果表明,Zn~(2+)对间接刺激神经诱发大鼠膈肌的收缩,诱发小鸡颈二腹肌的收缩均产生浓度依赖性抑制作用。Zn~(2+)不影响膈神经的兴奋和传导,对直接刺激诱发膈肌收缩的抑制作用弱于对间接刺激神经诱发膈肌收缩的抑制。Zn~(2+)不影响小鸡颈二腹肌对Ach的敏感性。说明Zn~(2+)主要作用于突触前膜阻滞神经肌接头的传递。Ca~(2+)、L—半胱氨酸可拮抗Zn~(2+)的阻滞作用。     

内河航电枢纽扩建二线船闸轴线选择研究

依托湘江株洲航电枢纽扩建二线船闸工程,采用定床物理模型,从船闸通航条件角度对扩建二线船闸与一线船闸相邻布置时两线船闸轴线间距选择进行研究。重点分析了扩建二线船闸不同轴线位置对两线船闸上、下游口门区和连接段航道的通航水流条件影响规律,提出了新老两船闸轴线间距在满足两线航道宽度要求和施工安全的前提下应尽量减小的轴线选取原则。     

A fault tolerance approach for railway scheduling and train control

This paper makes two contributions. It firstly proposes the use of a fault tolerance approach for railway operations and secondly it develops a minimum time gap matrix model for capacity computation and the study of perturbation effects through the generation of a compressed timetable. A fault tolerance approach is proposed to improve the operational efficiency of the railway network in terms of the network capacity and the robustness of train timetables. The term fault tolerance is used in a broad sense, to represent any abnormalities or unexpected events in operations or equipment. Enhanced fault tolerance capability provides safety assurance so that, in normal operating conditions, trains can adopt much faster speed profiles when approaching a ‘to-be-cleared’ signal block at stations and junctions than those currently permitted, effectively turning the status of ‘be ready to stop’ to that of ‘proceed with caution’. In the rare event of a ‘fault’ in the system, e.g. if a conflicting train fails to move out of a signalling block as expected or a switch fails to operate as required, the train would be re-routed to take an alternative path. In this study, the new approach is developed on three scenarios i.e., a standard classic right turn junction, a terminus station, and a small network combining both of these elements to demonstrate the performance gains, but the concept can be readily extended for other types of junctions/stations. Results so far show great potential in the proposed fault tolerance approach to increase the capacity and enhance operational robustness to perturbations at such locations. A novel method for capacity computation called minimum time gap matrix model is also introduced that has capability to produce compressed timetables directly from a given train sequence.     

综合交通枢纽客流识别系统的应用研究

本研究意在探究客流感知对综合交通枢纽运营管理的影响,提出客流预测系统的功能需求,构建客流预测系统的架构。     

琼州海峡隧道盾构对接冻土帷幕受力状态力学分析

采用三维有限元的方法对冻结法在盾构对接施工地层加固中所形成的冻土帷幕的应力状态和变形进行分析与安全评价,分别探讨单排管与双排管2种不同冻结方案的情况。对于盾构对接施工中刀盘拆除情况进行了模拟,分别选取圆周方向上一次性拆除不同长度的刀盘,研究其对冻土帷幕应力强度、径向变形和主应力的影响。研究结果表明,利用冻结法加固盾构对接是可行的;双排管冻结方案相比单排管冻结方案,安全性上有很大提高;圆周方向一次性拆除刀盘的长度对冻土帷幕的各个指标影响较大。 利用计算结果,可为盾构对接施工时冻结法地层加固提供参考依据。