In this paper, traffic environment quality assessment is achieved by applying fuzzy mathematics methods. Set up an assessment system, determine assessment criterion, formulate membership function, make program designs...In this paper, traffic environment quality assessment is achieved by applying fuzzy mathematics methods. Set up an assessment system, determine assessment criterion, formulate membership function, make program designs and conduct example analysis. The evaluation result is consistent with the real case. So that the method of the fuzzy evaluation is a good one for the environment quality assessment.展开更多
With the development of socio-economic conditions,comprehensive improvements in residential environments,and evolving family values among the elderly,mobility issues for senior citizens have become a prominent social ...With the development of socio-economic conditions,comprehensive improvements in residential environments,and evolving family values among the elderly,mobility issues for senior citizens have become a prominent social concern in China.Aging urban districts characterized by concentrated elderly populations exhibit significant environmental challenges and urgently need age-friendly infrastructure updates.This study conducted a comprehensive review of domestic and international literature related to the age-friendly renovation of the non-motorized traffic environment and systematically analyzed research trends and existing gaps.Furthermore,it investigated the pedestrian spaces in Tianjin’s aging urban districts and delineated multifaceted spatial challenges.Simultaneously,in-depth demographic analysis of the aging population in Tianjin’s four central urban districts informed the strategic selection of nine sub-districts—comprising the two sub-districts with the highest aging population rates in each district,along with Wanxing sub-district,which hosts the city’s largest elderly population.Through random interviews with 40 senior residents in those sub-districts,the multi-level environmental needs of elderly individuals in these aging urban neighborhoods were comprehensively explored and categorized.Ultimately,by comparing the environmental needs of the elderly population with the current urban landscape,this study accurately identified the key elements for the age-appropriate renewal of the non-motorized traffic environment.Furthermore,targeted strategic intervention plans that address the issue of infrastructure adaptation in aging urban areas are proposed.展开更多
By analyzing and comparing the existing methods for the division of urban economic region, this paper supplemented and developed the breaking point theory. In this model, put forward for the first time using ＂the spa...By analyzing and comparing the existing methods for the division of urban economic region, this paper supplemented and developed the breaking point theory. In this model, put forward for the first time using ＂the space-time distance＂ to replace ＂the space- linear distance＂ and ＂the city comprehensiveness quality- fuzzy comprehensive assessment Index＂ to ＂the urban population or GDP＇. Set up the algorithm of including ＂the space- time distance＂ and the city radiation scope changed with the changes of traffic conditions. Thus has realized ＂dynamically＂ tracing of the city radiation scope influenced by the traffic conditions. Taking Yichang city as an example, the paper analyzed the city function localization in the times of new traffic environments. Because China＇s cities are at the times of the traffic great changes, therefore, the method and the main conclusions of this paper have some methodology guiding sense to the majority cities of deffernt country to re-position.展开更多
Environmental stress model is proposed as an effective tool to the analysis and evaluation of navigational safety in ports and waterways. Marine traffic simulations are carried out in a virtual port area with various ...Environmental stress model is proposed as an effective tool to the analysis and evaluation of navigational safety in ports and waterways. Marine traffic simulations are carried out in a virtual port area with various arrangements and conditions. Calculations of stress values and traffic volume criteria are illustrated. The simulation results provide a valuable hint for safety management of vessel traffic. The model provides quantitative information and helps administrators in decision making to achieve desired safety level and improve the efficiency of vessel traffic in ports and waterways.展开更多
目前的行车安全场理论基于“人-车-路”三维构建势能函数,但忽略了复杂的天气因素对行车风险的复合影响,将道路状况(“路”)与天气情况(“环”)所产生的影响简单地归于一类。这低估了天气环境对行车风险的影响程度,并存在对极端天气的...目前的行车安全场理论基于“人-车-路”三维构建势能函数,但忽略了复杂的天气因素对行车风险的复合影响,将道路状况(“路”)与天气情况(“环”)所产生的影响简单地归于一类。这低估了天气环境对行车风险的影响程度,并存在对极端天气的风险解算不够敏感的问题,使得方法的实际应用受到较大局限。因此基于行车安全场(driving safety field,DSF)理论,引入了新的环境场函数,实现“人-车-路-环”的风险因素全覆盖,分别构建行为场(behavior field)、动能场(kinetic energy field)、势能场(potential energy field)和环境场(environment field),以此提出针对恶劣天气下的行车安全场BKPE模型。基于中国道路交通安全数据集对原有行车安全场相关参数进行重新标定。同时分析天气因素对行车安全影响的指数变化特征,构建环境了影响因子,并提出环境场函数。在构建包含环境场的行车安全场模型的基础上,基于Car-100数据集,对具体实例计算其人工势能函数,进行微观分析。通过2个典型事件进行多类型风险的量化分析,同时与原有行车安全场模型进行比较分析,说明原有行车安全场模型对于天气环境形成的风险存在低估。随后基于Bootstrap抽样,6次采样计算所得人工势能函数对实际交通事件的描述平均准确率达到91.7%。最终,基于BKPE模型,提出相应的行车风险控制对策。展开更多
文摘In this paper, traffic environment quality assessment is achieved by applying fuzzy mathematics methods. Set up an assessment system, determine assessment criterion, formulate membership function, make program designs and conduct example analysis. The evaluation result is consistent with the real case. So that the method of the fuzzy evaluation is a good one for the environment quality assessment.
文摘With the development of socio-economic conditions,comprehensive improvements in residential environments,and evolving family values among the elderly,mobility issues for senior citizens have become a prominent social concern in China.Aging urban districts characterized by concentrated elderly populations exhibit significant environmental challenges and urgently need age-friendly infrastructure updates.This study conducted a comprehensive review of domestic and international literature related to the age-friendly renovation of the non-motorized traffic environment and systematically analyzed research trends and existing gaps.Furthermore,it investigated the pedestrian spaces in Tianjin’s aging urban districts and delineated multifaceted spatial challenges.Simultaneously,in-depth demographic analysis of the aging population in Tianjin’s four central urban districts informed the strategic selection of nine sub-districts—comprising the two sub-districts with the highest aging population rates in each district,along with Wanxing sub-district,which hosts the city’s largest elderly population.Through random interviews with 40 senior residents in those sub-districts,the multi-level environmental needs of elderly individuals in these aging urban neighborhoods were comprehensively explored and categorized.Ultimately,by comparing the environmental needs of the elderly population with the current urban landscape,this study accurately identified the key elements for the age-appropriate renewal of the non-motorized traffic environment.Furthermore,targeted strategic intervention plans that address the issue of infrastructure adaptation in aging urban areas are proposed.
文摘By analyzing and comparing the existing methods for the division of urban economic region, this paper supplemented and developed the breaking point theory. In this model, put forward for the first time using ＂the space-time distance＂ to replace ＂the space- linear distance＂ and ＂the city comprehensiveness quality- fuzzy comprehensive assessment Index＂ to ＂the urban population or GDP＇. Set up the algorithm of including ＂the space- time distance＂ and the city radiation scope changed with the changes of traffic conditions. Thus has realized ＂dynamically＂ tracing of the city radiation scope influenced by the traffic conditions. Taking Yichang city as an example, the paper analyzed the city function localization in the times of new traffic environments. Because China＇s cities are at the times of the traffic great changes, therefore, the method and the main conclusions of this paper have some methodology guiding sense to the majority cities of deffernt country to re-position.
文摘Environmental stress model is proposed as an effective tool to the analysis and evaluation of navigational safety in ports and waterways. Marine traffic simulations are carried out in a virtual port area with various arrangements and conditions. Calculations of stress values and traffic volume criteria are illustrated. The simulation results provide a valuable hint for safety management of vessel traffic. The model provides quantitative information and helps administrators in decision making to achieve desired safety level and improve the efficiency of vessel traffic in ports and waterways.
文摘目前的行车安全场理论基于“人-车-路”三维构建势能函数,但忽略了复杂的天气因素对行车风险的复合影响,将道路状况(“路”)与天气情况(“环”)所产生的影响简单地归于一类。这低估了天气环境对行车风险的影响程度,并存在对极端天气的风险解算不够敏感的问题,使得方法的实际应用受到较大局限。因此基于行车安全场(driving safety field,DSF)理论,引入了新的环境场函数,实现“人-车-路-环”的风险因素全覆盖,分别构建行为场(behavior field)、动能场(kinetic energy field)、势能场(potential energy field)和环境场(environment field),以此提出针对恶劣天气下的行车安全场BKPE模型。基于中国道路交通安全数据集对原有行车安全场相关参数进行重新标定。同时分析天气因素对行车安全影响的指数变化特征,构建环境了影响因子,并提出环境场函数。在构建包含环境场的行车安全场模型的基础上,基于Car-100数据集,对具体实例计算其人工势能函数,进行微观分析。通过2个典型事件进行多类型风险的量化分析,同时与原有行车安全场模型进行比较分析,说明原有行车安全场模型对于天气环境形成的风险存在低估。随后基于Bootstrap抽样,6次采样计算所得人工势能函数对实际交通事件的描述平均准确率达到91.7%。最终,基于BKPE模型,提出相应的行车风险控制对策。
