实现快速公交运营指标的城市干道协调控制

快速公共交通（BRT）是一种新型的公共交通系统。选取运行车速和准点率作为城市快速公交的运营指标，提出了实现快速公交运营指标的城市千道协调控制设计方法，给出了评价结果，运用Synchro和Matlab软件给出了实例。实例分析表明，合适的城市千道协调控制设计能够实现快速公交预设的运营指标。     

肝动脉缺血后供肝组织中氧自由基含量变化及意义

利用犬肝自体原位移植模型，观察了肝动脉缺血（ＨＡＩ）后供肝组织的脂质过氧化物（ＭＤＡ），黄嘌呤氧化酶（ＸＯＤ）和超氧化物歧化酶（ＳＯＤ）活性变化。结果显示：随着ＨＡＩ时间延长，各指标活性与对照组比较差别显著（Ｐ＜０．０５）；术后血清谷丙转氨酶和胆红素含量增高更为明显（Ｐ＜０．０１），且下降缓慢（Ｐ＜０．０５）。认为，ＨＡＩ对供肝有明显的损伤作用，氧自由基是导致这一损伤作用的重要因素之一。     

核多功能仪首次通过法测定门静脉肝动脉血流的价值及临床意义

本研究以核多功能仪首次通过法为手段,以门静脉和肝动脉血流百分数、门静脉和肝动脉斜率为肝血流灌注指标,对25例正常人、125例各种慢性肝病患者作了测定。正常人结果与文献报道基本一致;各种肝病的结果与各自的病理变化相吻合;重复检测两次结果无差异。提示本测定方法稳定,结果可靠,具重复性,并有非创伤、简便、快速、价廉之优点;对了解肝病时肝脏的器质性变化及其程度有较大的参考价值,并有助于各种肝病的诊断和鉴别诊断。     

西部省区公路网规划的主要问题及对策

结合东部公路网规划经验，分析讨论西部区域网规划的主要问题，提出西部区域网规划的参考方法。     

Outsourced probe data effectiveness on signalized arterials*

ABSTRACT

This paper presents results of an I-95 Corridor Coalition sponsored project to assess the ability of outsourced vehicle probe data to provide accurate travel time on signalized roadways for the purposes of real-time operations as well as performance measures. The quality of outsourced probe data on freeways has led many departments of transportation to consider such data for arterial performance monitoring. From April 2013 through June of 2014, the University of Maryland Center for Advanced Transportation Technology gathered travel times from several arterial corridors within the mid-Atlantic region using Bluetooth traffic monitoring (BTM) equipment, and compared these travel times with the data reported to the I95 Vehicle Probe Project (VPP) from an outsourced probe data vendor. The analysis consisted of several methodologies: (1) a traditional analysis that used precision and bias speed metrics; (2) a slowdown analysis that quantified the percentage of significant traffic disruptions accurately captured in the VPP data; (3) a sampled distribution method that uses overlay methods to enhance and analyze recurring congestion patterns. (4) Last, the BTM and VPP data from each 24-hour period of data collection were reviewed by the research team to assess the extent to which VPP captured the nature of the traffic flow. Based on the analysis, probe data is recommended only on arterial roadways with signal densities (measured in signals per mile) up to one, and it should be tested and used with caution for signal densities between one and two, and is not recommended when signal density exceeds two.     

4种夏枯草提取物对家兔离体胸主动脉的作用

目的　研究夏枯草提取物对血管收缩的影响。方法　运用去甲肾上腺素引起家兔胸主动脉收缩模型的方法,记录了4种夏枯草提取物对去甲肾上腺素引起的家兔离体胸主动脉收缩曲线的影响。结果　夏枯草氯仿提取物、正丁醇提取物和乙酸乙酯提取物使去甲肾上腺素引起的家兔胸主动脉收缩曲线右移,且使其最大收缩幅度变小,而夏枯草水提取物则对去甲肾上腺素引起的家兔胸主动脉收缩曲线无明显的左移或右移。结论　夏枯草具有舒张血管、降低血压的作用。     

THE CHANGES OF PERIPHERAL BLOOD T LYMPHOCYTE SUBSETS IN PATIENTS WITH PRIMARY HEPATIC CARCINOMA BOTH PRE-TACE AND POST-TACE

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浅析干线公路改建与城镇化发展的关系

依托江苏省内多条干线公路改建的工程实例,从"规划、城镇化发展"等角度,探讨干线公路改建与城镇发展之间的关系,并提出干线公路改建的初步想法。     

干线公路与沿河道路交叉方式探讨

文章结合工程实践,通过区分几种不同条件的交叉情况,对干线公路与沿河道路的交叉设置方案进行探讨,论述了不同条件下交叉设置方案和型式等,为相关工程提供参考和指导。     

城市交通线控多时段配时方案过渡算法研究

随着城市交通问题的日益突出,信号配时方案的频繁过渡以及交通信号优先技术的推广应用,科学合理地实现信号配时方案的过渡,有利于进一步提高城市交通系统的运行效率.针对TSIS交通仿真软件提供的3种过渡算法,以3个交叉口多时段线控系统为例,以控制延误作为评价指标,对早高峰前后2种过渡场景进行了研究.研究发现算法1路网和干道控制效果优于算法2和算法3,而后两者有利于减少支路车辆控制延误.