浅谈港湾式公交停靠站的设置

本文讨论了城市道路路外侧港湾式公交停靠站的设置,包括对道路的要求以及港湾式停靠站的几何形式,并基于停靠站的通行能力分析了港湾式公交停靠站的适用性.最后,总结了港湾式停靠站的优点并提出了存在的问题.     

沥青路面罩面设计方法综述

近20a来，我国高等级公路建设发展迅猛，在公路里程不断增长的同时，也面临着严峻的养护任务，其中罩面是公路管理部门最为关心、也是应用最为广泛的一种养护措施。对现阶段国内外主要的沥青路面罩面设计方法进行了简要的介绍，并对其优缺点进行了较为全面的分析。     

5-氮胞苷对宫颈癌细胞系DAPK1异常甲基化的影响

目的　观察宫颈癌细胞系SiHa及HeLa中凋亡相关蛋白激酶 1(DAPK1)的表达与甲基化修饰之间的相关性,以及5 氮胞苷对细胞DAPK1表达和生长的影响。方法　应用甲基化特异性PCR法分析细胞中DAPK1的甲基化状态;采用RT- PCR及免疫组化SABC法检测不同浓度 5- 氮胞苷干预对宫颈癌细胞 DAPK1 mRNA及蛋白表达的影响;MTT法观察5 -氮胞苷对细胞增殖的影响。结果　DAPK1基因在宫颈癌细胞 SiHa中有甲基化修饰,5- 氮胞苷干预能使其甲基化的DAPK1基因重新表达并抑制细胞生长。结论　DAPK1 的甲基化修饰是宫颈癌发生重要机制之一,5 -氮胞苷能使甲基化的DAPK1去除甲基化修饰,重新表达并恢复抑癌作用。     

微观过程中的共振振动激发

提出微观过程中共振振动激发的概念，结合无阈能反应的理论，对反应（１）和（２）的理论计算结果作了进一步的解释和说明。     

航海院校水上专业固定滚轮技能教学探析

根据滚轮运动的特点,在水上专业学生固定滚轮教学中,采用循序渐进原则,探讨了开展滚轮运动的意义及应注意的问题,通过正确引导,消除了学生的恐惧心理,同时结合相关模仿练习,使学生对固定滚轮产生兴趣,从而提高了教学效果与训练质量。     

周家嘴路车流起动波速统计研究

通过实际观测和统计分析 ,论证了平面交叉口红灯转绿灯时车流起动波速可以满足正态分布假设 ,更可以满足泊松分布假设 ,后者拟合优度高于前者。揭示了在周家嘴路条件下 ,随着车辆排队长度增加 ,起动波速会相应变大 ,呈负指数规律上升的趋势 ,与低速混合路段有明显差异。据此建议 ,如将交通流动力学模型应用于高速公路或城市高架道路一类问题时 ,状态指数取值在 2 .5左右为好。     

城市物流服务站交通影响分析方法及应用

为有效地解决城市物流服务站的交通影响分析问题，在总结国内外研究成果基础上，提出了城市物流服务站交通影响分析的工作程序．用物流处理量作为实施交通影响分析的前提条件,针对交通服务水平不足以表征城市物流服务站对交通的影响程度，以交通影响度代之，并给出了相应定义与计算方法,讨论了包括改善邻近交叉口的交通组织、合理设置物流服务站进出口与道路交通标志标线等在内的减小城市物流服务站交通影响程度的措施．     

Improving Mobility Management for AII-IP Radio Heterogeneous Network Using SCTP

Mobility management is a very important function of mobile communication in all-IP radio heterogeneous network. In order to achieve an efficient mobility management, with low delay and low beacon overhead, a micromobile stream control transmission protocol （mmSCTP） scheme was proposed. This scheme reasonably utilizes SCTP features and elaborately designs execution-steps for vertical handoff. Moreover, it provides fast locating for idle mobile node when a session is initiated by the correspondent node. The analytical and simulation results show that the proposed scheme is effective in supporting fast vertical handoff and effective location management.     

Fine Mapping of a Deafness Mutation hml on Mouse Chromosome 10

Objective To map a mouse deafness gene.identify the underlying mutation and develop a mouse model for human deafncss.Methods Genetic lindage cross and genome scan wer used to map a novel mutation named hypoplasia of the membranous labyrinth (hml),which causes hearing loss in mutant mice.Results ① hml was mapped on mouse Chr 10 (～43 cM from the centromere) suggests that the homologous human gene is on 12q22--q24, which was defined on the basis of known mouse-human homologies (OMIM,2004). ② This study has generated 25 polymorphic microsateUite markers, placed 3 known human genes in the correct order in a high-resolution mouse map and narrowed the hml candidate gene region to a 500 kb area.     

EFFECTIVE SHIELDING OF UNIDIRECTIONAL CURRENT GENERATED MAGNETIC FIELDS

Introduction　　 Environmentalelectromagnetic fields are ofin-creasing concern.Passive shielding is often em-ployed to reduce magnetic fields. Cylindricalshielding geometry is widely employed in powerin-dustry such as protective pipes,cable ducts andlightning down- conductors. Although shielding ef-fects of such conducting shells on magnetic fieldshave been recognized in recent decades,most ofthe studies have been devoted to the case of“dipole” ( opposite equal currents) sources or bal-anced…