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應(yīng)急救援期間城市交通管制優(yōu)化研究及系統(tǒng)實(shí)現(xiàn)

發(fā)布時(shí)間:2018-05-02 23:34

  本文選題:應(yīng)急救援 + 交通管制; 參考:《山東師范大學(xué)》2017年碩士論文


【摘要】:隨著社會(huì)經(jīng)濟(jì)的快速發(fā)展和城市人口的不斷增加,私家車數(shù)量正迅速增多,城市特別是較大城市的交通問題也變得越來越嚴(yán)重,道路擁擠、交通堵塞等問題已嚴(yán)重干擾著人們的正常出行。當(dāng)城市某地發(fā)生突發(fā)緊急狀況時(shí),需要從各個(gè)地方向該地進(jìn)行及時(shí)的應(yīng)急物資輸送。為保證物資的有效運(yùn)輸,有關(guān)決策機(jī)構(gòu)往往采取較為嚴(yán)格的交通管制措施。在城市應(yīng)急救援期間實(shí)施臨時(shí)交通管制措施有利于對受災(zāi)區(qū)域?qū)嵤┛焖倬仍?但過度的管制必然會(huì)對社會(huì)居民正常出行產(chǎn)生較為嚴(yán)重的負(fù)面影響。為了保證物資的有效運(yùn)輸,同時(shí)盡量降低因交通管制所造成的居民出行成本,因此對管制方案進(jìn)行合理的優(yōu)化就變得尤為重要。為此,本文提出了城市應(yīng)急救援期間地面臨時(shí)交通管制優(yōu)化方案。對方案進(jìn)行優(yōu)化的目的是在保證應(yīng)急物資的及時(shí)運(yùn)達(dá)的同時(shí),最大程度降低因交通管制對居民正常出行的影響。為求解出臨時(shí)交通管制方案,本文做了如下工作:(1)構(gòu)建臨時(shí)交通管制方案數(shù)學(xué)模型。模型目標(biāo)函數(shù)用于最小化擾民程度,擾民程度通過對比管制前后社會(huì)車輛通過各路段的路阻變化情況均值刻畫。目標(biāo)約束函數(shù)為管制時(shí)長,考慮到管制需提前實(shí)施,管制時(shí)長為車輛通過應(yīng)急通道時(shí)間與車輛通過應(yīng)急通道各路段最長時(shí)間之和。(2)路段管制類型的啟發(fā)式選擇和基于引力模型改進(jìn)的BPR函數(shù)。通過引入邊介數(shù)及路段重要性指標(biāo),對于相對重要路段采取相對寬松的管制類型。通過引入引力模型對管制后路網(wǎng)車流量進(jìn)行調(diào)整,計(jì)算管制后車輛通過各路段時(shí)間。(3)構(gòu)建臨時(shí)交通管制方案求解算法。方案的求解是一個(gè)反復(fù)迭代的過程,考慮到路網(wǎng)結(jié)構(gòu)的復(fù)雜性,需管制路段數(shù)量眾多,路段管制類型多樣的特點(diǎn),本文構(gòu)建了基于改進(jìn)遺傳算法的臨時(shí)交通管制方案求解算法,同時(shí)給出了最優(yōu)臨時(shí)管制方案對應(yīng)的車流繞行方案。本文通過Sioux-Fall路網(wǎng)實(shí)驗(yàn)算例及Flintbury路網(wǎng)實(shí)驗(yàn)算例對模型及求解算法進(jìn)行驗(yàn)證,從驗(yàn)證結(jié)果可知,模型可快速給出應(yīng)急情況下的臨時(shí)交通管制優(yōu)化方案,即可在滿足救援需求的同時(shí)降低管制方案的負(fù)面影響。考慮到應(yīng)急救援期間城市臨時(shí)交通管制的現(xiàn)實(shí)意義,本文基于模型及算法研究并結(jié)合實(shí)際路網(wǎng)情況在Net Logo平臺(tái)上設(shè)計(jì)并實(shí)現(xiàn)了臨時(shí)交通管制優(yōu)化系統(tǒng)。
[Abstract]:With the rapid development of social economy and the continuous increase of urban population, the number of private cars is increasing rapidly. The traffic problems in cities, especially in larger cities, are becoming more and more serious, and the roads are congested. Traffic jams and other problems have seriously interfered with people's normal travel. When a sudden emergency occurs in a city, it is necessary to carry out timely delivery of emergency supplies from various places to the city. In order to ensure the effective transportation of materials, the decision-making organizations often take strict traffic control measures. The implementation of temporary traffic control measures during the period of urban emergency rescue is conducive to the rapid rescue of the affected areas, but excessive control will inevitably have a more serious negative impact on the normal travel of social residents. In order to ensure the effective transportation of materials and reduce the travel cost caused by traffic control, it is very important to optimize the control scheme reasonably. Therefore, this paper puts forward the optimization scheme of ground temporary traffic control during urban emergency rescue. The purpose of optimizing the scheme is to ensure the timely arrival of emergency supplies and to minimize the impact of traffic control on residents' normal travel at the same time. In order to solve the temporary traffic control scheme, this paper does the following work: 1) construct the mathematical model of temporary traffic control scheme. The objective function of the model is used to minimize the degree of disturbance, and the degree of disturbance is characterized by comparing the changes of road resistance between different sections of road before and after the control. The objective constraint function is the length of the control, considering that the control needs to be implemented in advance, The length of control is the heuristic selection and the improved BPR function based on gravity model for the control type of vehicle passing through the emergency passage and the sum of the longest time of the vehicle passing through each section of the emergency passage. By introducing edge mediums and road section importance index, relatively loose control type is adopted for relative important road sections. By introducing the gravity model to adjust the traffic flow of the road network after the control, the algorithm of solving the temporary traffic control scheme is constructed by calculating the time of the vehicle passing through each section of the road after the control. The solution of the scheme is a iterative process. Considering the complexity of the road network structure, the number of sections to be regulated and the various types of road control, this paper constructs a temporary traffic control scheme solving algorithm based on improved genetic algorithm. At the same time, the traffic bypass scheme corresponding to the optimal temporary control scheme is given. In this paper, the model and algorithm are verified by Sioux-Fall road network experiment and Flintbury road network experiment. From the verification results, the model can quickly give the optimization scheme of temporary traffic control in emergency situations. Can meet the rescue needs while reducing the negative impact of regulatory programs. Considering the practical significance of urban temporary traffic control during emergency rescue, this paper designs and implements a temporary traffic control optimization system on Net Logo platform based on the research of model and algorithm and combining with the actual road network situation.
【學(xué)位授予單位】:山東師范大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2017
【分類號(hào)】:U491.4;TP311.52

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