为探究非机动车对机动车干扰行为的影响因素,将此干扰行为划分为摩擦干扰和阻滞干扰2种类型;基于成都市内2个典型地点8 h的视频资料,提取249条摩擦干扰行为数据和308条阻滞干扰行为数据,并分别对2类干扰行为构建二元Logistic模型、随机效应二元Logistic(RIL)模型、随机参数二元Logistic(RCL)模型和随机效应及参数二元Logistic(RICL)模型,确定非机动车对机动车干扰行为的显著影响因素。结果表明:考虑观测地点异质性和观测对象异质性的RICL模型最优;非机动车成群行驶、装载状态、路侧停车、出入口、逆行车辆和非机动车类型均会显著影响2类干扰行为,且绿灯期间发生2类干扰行为的概率较大。规范非机动车行驶、优化机非行驶环境及提升安全行驶意识可有效规避机非间干扰行为的发生。
In order to classify and analyze the characteristics of red light running behaviors of motorized vehicles, the concept of critical distance was introduced, and red light running behaviors were classified into three categories—deliberate red light violation at red onset, unintentional red light violation at red onset, and red light violation at red end—according to the start and end time of red light. Based on video observation data, the number of motorized vehicles that commit any of the afore-mentioned three categories of red light violations was statistically analyzed, and then their characteristics under various traffic control and management conditions were explored by the z-test method. The results show that the majority of red light runners at red start are deliberate, while the unintentional red light violators also share some proportion. At the end of red light, there are a few vehicles violating red light as well. Additionally, the rates of red light running are obviously varying between those three classifications of red light running under the conditions of countdown timer, automatic red light camera, green flashing device, different speed limits and peak period.
哈达湾老工业区承载着带动经济和传承后工业文化的重要职能,然而目前该区域发展结构、生态品质和功能配置与其中枢职能不相符.本文通过梳理哈达湾老工业区的发展背景,发现该区域存在生态环境污染、产业发展落后、工业文化断层问题.为满足该区域生态环境转型需求、功能置换转型需求、文化遗产传承需求,本文尝试提出以最小累积阻力差值法评估生态修复用地、城市修补用地的分配适宜性,构建支撑哈达湾老工业区棕地整治、水系统织补、绿地保护、优化结构、置换功能、延续文脉的更新策略,旨在提升双修视角下老工业区更新的可行性与实效性.
风险资本是支持创新的资本,基金募集环节是风险投资的首要环节.由于风险投资具有高风险性、专业性、投资对象的高成长性、投资的周期性和长期性等特点,其募集也有其独特的特点.本文首先梳理和分析我国风险投资基金募集相关法律现状和问题,然后借鉴国外风险投资基金募资环节立法经验,指出我国风险投资基金立法改革的4个方向:规范风险投资基金的私募行为,鼓励多种渠道资金进入风险投资行业,建立税收扶持政策体系、鼓励基金投向创新型企业,构建完善的风险投资法律体系.
为了提高城市轨道交通的社会效益和经济效益,需要根据城市轨道交通运营阶段的特点,制定科学合理的发展策略和灵活的票务政策,因此,城市轨道交通各运营阶段的划分显得尤为重要.基于我国城市轨道交通各运营阶段的特征分析,从线网运营规模、运营特征和服务特性等三个方面,选取了九项指标建立指标体系,作为运营阶段划分的主要依据,并采用模糊综合评判方法进行实例分析.结果表明,所建立的指标体系能对城市轨道交通所处运营阶段做出准确划分.