公路线形设计因素对交通安全的影响分析

从公路线形方面(直线、平曲线、竖曲线、线形组合等)、视距方面及线形组合与道路景观的协调性方面分析了公路线形设计因素对交通安全的影响,并提出了线形设计中应注意的一些问题,以使公路线形更适合驾驶员的视觉和心理要求,最大限度地保证交通安全。     

岩石边坡生态恢复技术中锚杆受力分析研究

围绕岩石边坡生态恢复技术,通过对锚杆受力情况的研究分析,确定了在不同岩石类型以及不同坡比的坡面上,其锚杆的最佳锚固深度和最佳锚固间距。并得到如下结论:主次锚杆的锚固深度只受水泥砂浆与岩体的结合强度的影响,不受边坡坡度和高度的限制。     

用化学发光法进行兔体锌盐药代动力学的研究

本文采用化学发光技术,对兔体血浆中不同锌盐的吸收代谢状况,进行了跟踪监测,将测试结果输入计算机进行数据处理,效果满意。     

拱桥拱背加固减载法

拱桥拱背加固减载法是对传统拱桥加固中扩大截面加固法的创新和改造，结合湖北省三峡库区3号桥和福建省永安大溪桥的加固实例，分析拱桥拱背加固减载法的机理、特点和适用范围。     

套管咬合桩支护技术在地铁工程中的设计与应用

结合对全套管钻孔咬合桩关键技术的研究及其在南京地铁工程中的应用,分析该工法的综合优势和适用条件,首次提出无筋桩的刚度贡献按10%～20%考虑的建议,满足施工工艺要求的超缓凝混凝土配制方法;成功应用具有自主知识产权的国产液压套管桩机完成了一批深大基坑的施工,对地铁车站和类似的深基坑工程有指导意义     

MMC子模块电容电压波动特性研究

模块化多电平变换器(MMC)中子模块的电容由于悬浮布置,当电容上流过电流时会对电容进行充放电,从而产生较大的电容电压波动。本文利用环流与电容电压波动之间的关系,通过计算低频环流大小,对子模块电容电压的低频波动和开关频率次的波动进行了研究。最后在Matlab中搭建仿真模型,通过仿真验证了推导结果的正确性。     

Effects of intersection field of view on emergent collision avoidance performance at unsignalized intersections: analysis based on driving simulator experiments

Proper intersection sight distance can effectively lower the possibility of intersection accidents. American Association of State Highway and Transportation Officials (2011) provide a series of recommended dimensions of intersection sight triangles for uncontrolled and stop/yield‐controlled intersections. However, in reality, although the actual intersection design for unsignalized intersections satisfies the requirements of sight distance and clear sight triangle in American Association of State Highway and Transportation Officials' guideline, there are still a large number of crashes occurring at unsignalized intersections for drivers running stop/yield signs or failing to slow down. This paper presents a driving simulator study on pre‐crash at intersections under three intersection field of view (IFOV) conditions. The aim was to explore whether better IFOVs at unsignalized intersections improve their emergent collision avoidance performance under an assumption of valid intersection sight distance design. The experimental results show drivers' ability to identify potential hazards to be significantly affected by their IFOVs. As drivers' IFOV improved, drivers were more likely to choose braking actions to avoid collisions. Better IFOVs were also associated with significant increases in brake time to intersection and significant reductions in deceleration rate and crash rate, thus leading to a lower risk of traffic crash involvement. The results indicate that providing a better IFOV for drivers at intersections should be encouraged in practical applications in order to improve drivers' crash avoidance capabilities. Copyright © 2016 John Wiley & Sons, Ltd.     

北豆根中粉防己碱的药物代谢动力学研究

粉防己碱是北豆根所含主要有效成分之一，为了解药动学和药效学的关系，本文选择灵敏度高，选择性强的胶束荧光法，研究了粉防己碱在兔体内的药代动力学。实验结果表明，粉防己碱是一种中速吸收，中速消除的药物，其几个主要药动学参数为ｔ１／２（α）为１．４ｈ，ｔ１／２（β）为５．１８７ｈ、ｔ１／２（Ｋａ）为１．３１４ｈ、Ｋ２１为０．４３１２ｈ－１、Ｋ１０为０．１５３４ｈ－１、Ｋ１２为０．０４４ｈ－１、ＡＵＣ为１０５．７μｇ·ｈ·ｍｌ－１。     

公积金监管系统中的多级数据集成研究

数据集成是住房公积金三级监管系统中的核心和难点.对比传统集成方法的缺陷和现有系统存在的问题,提出了运用中间件技术对分布式、异构数据进行分析和整合的解决方案.基于EA Server应用服务器,实现了该集成方案,使系统的执行效率、系统的可维护性和灵活性均得到了大幅提高.     

兰州市水价改革方向研究

兰州市日前正处于水价改革前期,与浙江省相比:兰州市水价仍有很大的上涨空间,在实行"阶梯式水价"的目标上,也有很多工作要完成;水管单位要继续加强节约用水的宣传力度,深化研究水处理工艺,降低制水成本;同时,应该提高水质及服务质量,以减小水价改革所面临的阻力;相关单位对所上缴的水费必须做到专款专用.并据此提出了水价调整方案的建议.