服务代理企业知识吸收能力的概念及构成

知识吸收能力对服务代理企业培养竞争优势实现可持续发展有着重要的意义。从组织层次的角度来看,服务代理企业的知识吸收能力由三部分构成:个体知识吸收能力、团队知识吸收能力、企业知识吸收能力。     

港口区位价值理论探析

港口作为现代交通综合运输链的重要节点，正在成为开放带动型区域经济竞争优势的重要来源之一。港口的发展客观上受到发展与运营环境、需求环境、生产要素环境、支持环境、机会与政府六大要素的影响。充分考虑到港口区位、资源与能力及要素环境的改善，初步探讨了港口区位价值的内涵、影响因子体系、港口能力与竞争优势、港口区位价值金字塔模型等基本理论问题。     

城市交通问题的产权分析

通过对多个城市的观察,发现《中华人民共和国道路交通安全法》的许多条款形同虚设,得不到切实的执行。本文根据产权理论对这一现象进行了分析,解释当前城市交通问题的主要成因即：车辆的增多、无法识别、十字路口和交通意识。产权的主要作用是帮助人们形成与他人交流的信息的预期,有了清晰界定的产权,就可以减少城市交通中人与人之间的不确定性,减小冲突的发生。为此,本文提出了解决城市交通问题的政策建议,即限制行车数量、增强非机动车辆的识别能力和规范十字路口标识,提高公民城市交通意识。通过减少交易成本,清晰的界定产权等手段规范城市交通,从而帮助行人建立稳定的预期,保证道路畅通。     

长短桩复合地基理论浅析

长短桩复合地基在工程实践当中应用广泛,对其进行研究分析以使其更好的服务工程建设有着积极意义。本文对长短桩复合地基的承载力与变形进行分析。     

中等城市绿色交通系统分类评定模型建构

根据以往我国城市绿色交通的调查结论,设计调查问卷,调查之后进行分析。运用Logit回归模型,建立一个专门针对二元因变量的Binary Logit模型,得出以下结论:收入水平、交通拥堵状况、对小汽车的态度和低碳环保意识4个变量因为统计检验不显著而未能进入最终模型。同时,油价、停车费、居所附近的直达公交线路、居所附近的轨道交通、公共交通乘坐舒适度、工作日平均出行距离与居民绿色出行方式的选择具有显著相关关系。     

基于视频图像的车辆检测算法研究

固定镜头下视频序列中的运动汽车目标的检测、分割、跟踪及计数等底层视觉问题进行了研究,提出了计算交通流量的算法。仿真实现表明:此算法可以有效的去噪、检测目标并计数。     

网络流量测量研究综述

随着网络技术的发展，新的网络流量测量技术不断涌现，其中一些研究成果已被采纳并在设备中实现。文章介绍了网络测量的国内外研究现状，总结和概括了已有的网络流量测量技术特点，并对该领域的关键技术和难点问题进行了分析。     

Road safety impacts of the motorcycle in Brazil

Brazil has had high indices of traffic injuries and deaths since the 1950s, mostly related to the increasing and irresponsible use of the automobile. Upon approval of the Brazilian Transit Code (CTB) in 1997, traffic injuries and deaths began to diminish, despite an increase in vehicle fleet size, a phenomenon that had never occurred previously. Concurrently, starting in 1991 and with a great intensity after 1996, there has been a sizeable increase in motorcycle production and use, facilitated and encouraged by public officials. Between 1995 and 2000 annual sales figures for motorcycles doubled and reached 2 million units in 2008. Traffic deaths associated with motorcycles increased exponentially, rising from 725 in 2006 to 10,143 in 2010, eliminating the advances gained by the CTB in reducing auto-related injuries. This article analyses the process and its impacts on road safety. The first part summarises the main public policy decisions related to the theme. Part two analyses changes in traffic safety after the introduction of this new technology. Part three looks at the possible political, economic and social motives that lie behind this process. The final part suggests solutions to the great prejudice caused to society and the nation.     

Design of limited-stop bus service with capacity constraint and stochastic travel time

This paper develops a mathematical model for the optimal stopping design of limited-stop bus service, which allows each bus vehicle to skip some stops. To better reflect the reality, this paper considers the vehicle capacity and stochastic travel time. Also, vehicles are all allowed to skip stops whereas any stop is not allowed to be skipped by two consecutive vehicles. A hybrid artificial bee colony (ABC) and Monte Carlo method is developed to solve the optimal stopping strategy. Finally, the model and solution method are validated by a numerical example, and a sensitivity analysis is performed on the passenger demand.     

运输能力限制条件下的煤炭物流路径选择

针对保障电厂用煤安全这一关系生产生活用电的重大问题,从标准运输问题模型出发,结合电力企业的实际情况,将多目标运输模型应用于煤炭运输问题,并针对接近或达到饱和的线路设定运力限制约束条件,建立运力限制下的多目标运输模型。通过实例分析运用Lingo软件对模型进行求解,验证了模型在解决运输能力限制条件下煤炭物流路径选择中的应用性,可为电力企业制定或优化煤炭调运方案提供依据。