KSUTraffic: A Microscopic Traffic Simulator for Traffic Planning in Smart Cities

Simulation is a powerful tool for improving,evaluating and analyzing the performance of new and existing systems.Traffic simulators provide tools for studying transportation systems in smart cities as they describe the evolution of traffic to the highest level of detail.There are many types of traffic simulators that allow simulating traffic in modern cities.The most popular traffic simulation approach is the microscopic traffic simulation because of its ability to model traffic in a realistic manner.In many cities of Saudi Arabia,traffic management represents a major challenge as a result of expansion in traffic demands and increasing number of incidents.Unfortunately,employing simulation to provide effective traffic management for local scenarios in Saudi Arabia is limited to a number of commercial products in both public and private sectors.Commercial simulators are usually expensive,closed source and inflexible as they allow limited functionalities.In this project,we developed a local traffic simulator“KSUtraffic”for traffic modeling,planning and analysis with respect to different traffic control strategies and considerations.We modeled information specified by GIS and real traffic data.Furthermore,we designed experiments that manipulate simulation parameters and the underlying area.KSUTraffic visualizes traffic and provides statistical results on the simulated traffic which would help to improve traffic management and efficiency.

代客泊车服务现状及发展建议研究

基于代客泊车服务类型、业态归属、发展影响因素及企业运营现状等情况,从供给端了解代客泊车运营服务现状。通过问卷调查,从需求端解市民对代客泊车服务的使用情况及使用意愿。从共性与个性两个角度,分别分析代客泊车服务存在的问题。结合代驾行业发展及案例,探索代客泊车发展前景。从业态发展路径、业态管理、宣传引导等角度研究提出规范代客泊车服务发展建议,以期促进代客泊车服务市场秩序规范,推动代客泊车新业态可持续发展。

The role of forest culture in green construction and management of forest parks:merging knowledge-attitude-practice and theory of planned behavior

As a cultural concept refl ecting the relationship between humans and forests,forest culture plays an active role in sustainable forest management.Forest parks provide a wide range of ecosystem services essential for the sustainable development of society,and the relationships between forest culture,green construction and management of forest parks have practical signifi cance.This study aimed to understand the interaction and process of forest culture infl uencing green construction and management in forest parks with the models Knowledge-Attitude-Practice(KAP)and Theory of Planned Behavior(TPB)by proposing a theoretical model.Four hypotheses were tested using data collected from 193 forest park employees in Heilongjiang Province,China.Our results show that forest culture had a signifi cant infl uence on green construction and forest management.In addition,subjective norm and perceived behavioral control directly impacted behavior in green construction and management of the forest park,whereas attitude did not have an impact.Subjective norm had a direct eff ect on attitude.Results between constructs show that forest culture had an indirect eff ect on planning and construction,and on ecological and economic management.Consequently,it supported three of four hypotheses within the proposed model in determining the infl uence of forest culture on green construction and management.

Cartographic-Environmental Analysis of the Landscape in Natural Protected Parks for His Management Using GIS.Application to the Natural Parks of the“Las Batuecas-Sierra de Francia”and“Quilamas”(Central System,Spain)

In this work we report a methodological procedure with an integrated physical-perceptual approach that allows units of landscape in protected natural areas to be differentiated. First, indirect methods were applied by means of a mapping procedure, which identified the physical components of major relevance. We then generated maps of natural units, anlyzing the “printed” landscape of a territory. Secondly, we developed direct methods to identify and describe the reresentative elements of the landscape, analyzing the “perceived” landscape. The identification and delimitation of these landscape units with geographical information systems provide detailed maps facilitate the tasks of planning and management. The procedure was validated by means of its application in two protected natural spaces. The treatment used here considers landscape not only as an aesthetic element but also as something “live” elaborating maps that should be of use in land planning and management of natural areas.

About the Optimized Design of the Parking Space on the Campus of a College

In recent years, with the large increase in the number of motor vehicles in colleges and universities and the lag in campus planning, the relative shortage of parking spaces on campus has become increasingly serious. Taking Baoding College as an example, this article analyzes the current situation of static traffic on campus and finds out the problem of parking on campus through questionnaire surveys and field surveys. Analyze the growth trend of the number of motor vehicles based on the data, use the GM (1, 1) model and the linear fitting model to predict the number of motor vehicles in the future, and determine the size and layout of the parking lot based on the campus size, functional zoning, and road layout. The big campus-based parking system planning method based on big data can effectively solve the problems of small sample data, low accuracy, and poor timeliness of traditional methods, which improves the practicability and scientificity of planning results.

基于复杂网络的高速公路交通事故风险动态演化模型

为有效挖掘高速公路交通事故规律信息,基于复杂网络理论提出高速公路交通事故致因网络构建方法.从风险结构与风险模式两方面定义风险传播机制,通过高速公路交通事故致因网络与风险传播机制的有机结合,建立了高速公路交通事故风险演化模型.以高速公路重特大交通事故为例,对201份高速公路重特大交通事故调查报告进行风险分析.结果表明,基于复杂网络的风险演化模型适用于高速公路的交通事故风险分析;通过高速公路交通事故风险演化模型可对各致因的风险传播特性进行解析与归类,从而制定出针对不同情形致因的控制策略,为高速公路交通事故风险演化研究提供新思路.

高速公路客货混行交通流元胞传输模型

针对客货混行引发的交通流稳定性下降、交通安全风险增加以及运行效率降低等问题,构建一个多车道客货混行交通流元胞传输模型,从宏观角度研究不同货车渗透率下的高速公路客货混行交通流特性.首先,利用微观车辆跟驰模型,分析均质小汽车和货车交通流的基本图特征,提出不同货车渗透率下的客货混行交通流基本图模型.然后,采用具体参数表征换道、有限加速度造成的道路交通容量下降效应,刻画客货混行交通流中货车对直行和换道流量的影响,采用Logit模型计算多因素影响下的换道交通流量,构建多车道客货混行交通流元胞传输模型.最后,通过高速公路多场景仿真实验验证模型的有效性.研究结果表明:所提出的模型可准确模拟高速公路上的客货混行交通流演变过程;货车渗透率是影响混行交通运行的关键因素,在交通事件导致车道数减少时,货车渗透率超过0.6会导致交通拥堵难以消散.研究成果可为高速公路客货混行交通流特性研究提供分析工具,为客货混行下的交通管理和疏导策略制定提供理论方法.

终端空域航段拥堵演化机理尖点突变分析模型

为保障终端空域正常运行,对终端空域拥堵演变机理进行研究。将拥堵分为自身结构致因和外部因素致因两类,建立了拥堵形成与消散的分析模型;依据交通流演化的特征指标及Greenshields理论建立了拥堵机理尖点突变分析模型。以成都终端空域为研究对象,利用AirTOp软件生成仿真运行数据,验证了模型有效性。结果表明,所设计模型可有效描述拥堵演化的宏观过程,通过航段当量流量、密度及波速的变化,可有效对拥堵演化的机理进行分析。

全域空间治理视角下长株潭绿心中央公园风貌管控探索

城乡风貌管控是促进城乡高质量发展的有效手段。本文以《长株潭绿心中央公园建设风貌管控导则》为例,基于当前国土空间规划背景下全域全要素的空间治理目标,面对长株潭绿心中央公园风貌管控传导路径不畅、城乡统筹不足、管控措施乏力等治理困境,构建了技术体系、传导路径和衔接机制3个层面的长株潭绿心中央公园风貌管控体系,并通过导控结合的方式,提出长株潭绿心中央公园全域风貌管控治理优化路径,以期能为我国全域风貌管控体系的系统构建提供有益参考。

基于多目标混合启发式算法的协同无冲突4D航迹规划

为促进基于航迹运行的框架下未来空中交通管理系统的协同决策,本文提出了一种协同无冲突4D航迹规划方法。首先以提高航班效率和航空公司间的公平性为目标,以无冲突为约束构建了一个多目标整数线性优化模型。其次,提出了一种基于基尼系数的指标以量化航空公司间的成本分配公平性。为了提高问题求解效率,采用了基于网格的探测方法以加速冲突检测,并设计了一种多目标混合启发式算法(Multi-objective hybrid-meta-heuristic optimization algorithm,MHMOA),通过结合模拟退火(Simulated annealing,SA)和爬山局部搜索算法来近似最优的非支配解。最后,利用实际航班计划和航路网络数据比较和分析了MHMOA、SA和两种常规多目标优化算法的优化结果。结果表明,MHMOA所获得的非支配解的质量更高、延误更低且航空公司间公平性更优,在3个多目标优化性能指标方面表现优异,可为空中交通管理员提供更详细的决策支持。

国土空间规划背景下交通详细规划体系探究

国土空间规划体系的建立对现行城市规划的编制、实施、管理提出全新要求。该文在现行详细规划体系中交通规划内容存在的主要问题基础上,结合新规划体系中详细规划发展趋势及要求,进一步明确交通详细规划的定位和作用,提出交通详细规划的初步理论框架设计,包括技术支撑体系和规划编管体系,并给出两大体系的规划技术方法、内容指引要求和规划编制、实施、管控、监督等相关建议,为后续国土空间详细规划编管提供一定的技术支撑和操作建议。

面向自主运行的多航空器路径博弈协调

针对自主运行模式下的航空器路径冲突问题,提出一种基于分布式决策的多航空器路径博弈协调方法。所提方法设计构建了自主运行航空器路径规划混合策略-演化博弈模型,分为两部分:基于混合策略博弈思想,通过剔除无法达到均衡状态的博弈策略而缩减航空器路径博弈的解空间构成,极大简化博弈问题的求解过程;将该问题设定为不完全理性的演化博弈问题,进而设定各航空器路径选择偏好的演化规律,求解该演化博弈问题的均衡解。应用实际扇区结构和数据进行仿真实验,结果表明:执行自主运行模式的航空器,其平均路径长度仅增长了9.15%,但是可以促进空中交通复杂度峰值降低30.15%,空域中得到高效利用的栅格数量增加了26.46%。在模拟晴空湍流和座舱失压扰动环境下,该路径的抗扰动能力得到显著提升,受扰航空器数量分别下降了32.39%和56.72%。

Evolutionary game analysis of shared parking market diffusion under government management

The imbalance between supply and demand in urban settings poses a significant barrier to the sustainable advancement of urban transportation.Shared parking serves as a viable solution to mitigate these challenges.Nevertheless,for its sustained growth,a regulatory mechanism enforced by the government is imperative.To promote shared parking market diffusion,we construct an evolutionary game model that incorporates the government,enterprises and parking demanders.It explores stabilization strategies for these stakeholders and identifies multiple equilibrium states under different parameter conditions.The results show that the rate and stability of these evolutionary strategies are constrained by the mutual benefits derived by the three parties.Furthermore,such stakeholders are reciprocally influenced by their willingness to engage in shared parking to varying degrees.Government subsidies serve as a determining factor for the strategic choices made by both enterprises and demanders,albeit at different evolutionary rates.Demanders who have a higher value of time tend to park on-street,thereby influencing enterprise strategies.To foster the long-term growth of the shared parking market,the government must enact appropriate subsidy policies,maintain consistent regulations and advocate for increased subsidies for parking demanders to reduce the effect of temporal heterogeneity on parking behavioural choices.

面向TBO运行下的空中交通管理概念系统模型构建

TBO运行是民航未来发展的重大系统性工程,需统一各项标准和运行规范,目前空管运行体系存在的运行相对分割、信息共享相对分离、系统建设相对独立的问题严重影响了TBO运行概念的建设和发展。针对上述问题,文章通过应用信息资源规划方法和6W模型,提出了一种通用概念模型构建方法,指导TBO运行模式下的统一空中交通管理概念系统建模。通过提高对TBO运行的认识,能够有效地为后续相关业务实现信息化提供技术支撑。

医院视角下医院周边交通拥堵治理的探索与实践

本文从医院自身参与治理的角度对医院周边交通拥堵问题的治理措施及效果进行探究与分析。以北京市核心区医院为研究对象,通过实地调研、走访等方式分析其周边拥堵成因,以医院为主体建立了交通治理评价指标体系,并对医院参与治理的情况和治理效果进行评价。经过持续一年的治理与评估,多数医院上下午出诊号源比例更加均衡,基本达到1.2∶1,医院及周边停车服务有效优化提升,高峰期医院周边机动车出行总量平均减少10%左右。提出的评价指标体系考虑了医院周边交通拥堵的内外因素,从医院视角即从源头结合其他交通管理措施提出改善措施,为缓解医院周边交通拥堵和提高患者就医体验提供新的思路和方法。

海南热带雨林国家公园公路交通可达性

海南热带雨林国家公园是我国首批设立的国家公园之一,科学合理的交通规划是国家公园生态旅游、环境教育及社区发展的有力保障。以海口和三亚到海南热带雨林国家公园各乡镇或区域的公路交通线路为研究对象,采用ArcGIS 10.8对其公路交通可达性进行量化。主要结果如下:三亚与海南热带雨林国家公园各主要乡镇及各区域的公路交通平均旅行时间均显著低于海口;国家公园内公路交通可达性系数较高的乡镇主要分布在高速公路两侧,交通平均旅游时间及可达性系数较低,交通便利性较好;国家公园内不同区域公路交通可达性系数上,鹦哥岭区域、五指山区域、毛瑞区域、黎母山区域可达性系数小于1,表明这些区域较尖峰岭区域、吊罗山区域和霸王岭区域具有更好的交通可达性。研究结果可以为海南热带雨林国家公园公路道路规划提供参考和本底资料。

成德眉资经济圈轨道交通一体化发展对策研究

经济圈是都市圈发展进程中寻求更高标准、更高质量的城市形态,不仅能够更好地优化城市资源配置,还能够提升城市整体竞争力,促进经济的持续健康发展。成德眉资经济圈轨道交通一体化建设,不断促进多层次轨道交通初步成网,轨道交通半小时通勤圈和“两环三射”框架初步形成。通过阐释成德眉资经济圈轨道交通发展现状,从线网布局、运营管理、协同机制等方面,分析成德眉资经济圈轨道交通一体化发展存在的问题,提出完善轨道交通线网布局、加强运营管理一体化、强化组织协同管理等对策,以推动成德眉资经济圈协同发展。

澳大利亚海洋类国家公园露营地规划管理分析与启示——基于3个露营地的案例研究

露营地是伴随世界国家公园建设过程中产生并逐渐普及的一种弱建设、低干扰的生态旅游设施。澳大利亚是一个被海洋包围的国家,海洋类国家公园建设较早,生态旅游设施相对完善,露营地规划管理相对成熟。通过对澳大利亚洲西海岸海洋类国家公园露营地规划管理的实际调研,采用案例研究方法,梳理了澳大利亚海洋类国家公园3个不同类型的露营地规划管理特点,分析了影响国家公园露营地规划管理的多种因素,揭示海洋类国家公园的选址规划,主要受海洋资源环境的游憩价值开发与海洋生态保护目标两大影响因素之间平衡关系的影响,认为科学的露营地规划管理是平衡海洋类国家公园海洋生态保护与海景游憩资源开发的重要途径之一,提出建立海洋类国家公园露营地建设从“选址规划”到“布局管理”综合性框架,为我国设立海洋类型国家公园营地规划管理提供借鉴启示。

城市停车管理制度现存问题与完善路径

“停车难”是当前城市治理中的重要问题,完善停车管理制度对促进智慧城市建设具有重要意义。目前,我国城市停车管理制度存在停车管理主管部门权责不清、居民停车成本较高、停车场经营者权益保障困难、智慧停车平台面临发展困境、停车管理也缺乏有效的制度抓手等问题,有必要明确停车管理主管部门、完善停车管理中的信息公开与公众参与、探索改进停车场经营模式、扶持智慧停车平台推广、健全停车监管机制,从而解决“停车难”问题,推动智慧城市建设。

基于有序聚类分析的武夷山国家公园森林旅游景观类型划分

依托武夷山国家公园森林景观资源的连贯性和完整性,采用Fisher有序聚类法,结合现场访谈信息数据,提取旅游景观观测因子并对观测因子进行编号建立空间矩阵,寻找最优分割聚类后确定各个景观段落的主题。结果表明,武夷山国家公园森林旅游景观可划分为8个单元段,即坡地草坪景观段、山谷阔叶林景观段、山谷针阔混交林景观段、山脊阔叶林景观段、坡地针阔混交林景观段、山谷茶田景观段、阔叶林溪流景观段和岩石溪流游景观段。