According to Metro Line 1 Qianhai Bay depot and Metro Line 3 Henggang depot research and measurement,it is compared and analyzed that measures of vibration alleviation and noise reduction are taken. Through the comprehensive comparison of various measures of vibration alleviation and noise reduction,the corresponding measures of vibration and noise reduction are summed up,to make no effect of vibration and noise of train to run on metro depot upper property.
The traditional focus more on highway road development of technical indicators, emphasizing the road transport service capabilities and service quality and the benefits to the national economy, while ignoring the people on environmental factors such as road construction requirements, design theory and design evaluation research lags far behind the design practice. This study of the Zhuhai Airport Expressway acoustic environment characterized by analysis through three levels of Alternatives proposed Zhuhai Airport Expressway sound environmental design technology and the implementation of specific measures to take effective measures to build environment-friendly high-speed highway, take the road of sustainable development.
The research is based on the eco-power racing car. The airfoil was used in CATIA body modeling to improve air-flow characteristics. A right mesh dividing method in the boundary layer for eco-power racing car was found by using the control variable method research. Besides, oblique parting surfaces was de-signed to reduce the three-dimensional eddy current in the rear of the car. Through CFD comparisons, mod-ification was made on the body styling, and the body styling scheme of eco-power racing car was finally put forward.
With the rapid development of road transport,the traffic safety situation in China is urgent.For the better security of people's travel,the safety assessment on the early road construction should be made.The paper establishes the evaluation index system by the Delphi;and calculated the evaluation index weights of each factor by the AHP.The paper has established the road safety evaluation mechanism which quantifiable and feasible from the system engineering angle.
Metropolitan central city parking is difficult issues.Based on the investigation and analysis on the area of parking facilities,the attribution conditions of parking,parked type,parked time,parked frequency,etc.in Manhattan area,Harbin,using the static traffic occurrence rate model,the author predicted the parking needs of the area and put forward the corresponding parking demand strategy.The results show that it was seriously short of the number of parking and commercial parking was even worse in that area.Based on the results of the prediction,recommendations on parking planning and management were given out:strengthen rational planning of the street outside parking and street parking develop reasonable parking standards,etc..The results of forecasting and recommendations provide a reference for parking planning of similar areas.
Vehicie Miles Traveled (VMT) is an important input parameter to emission estimation model,which would affect the accuracy of the model output.This paper presents an alternative VMT estimation approach that incorporates both traffic counts and link attributes through an exponential regression model in estimating 1ink volumes and VMTs,which are then further disaggregated over the speed and time domains.The model coefficients can be calibrated easily in the real-world applications.
The article summarizes the situation of Beijing's traffic development in the view of traffic environment.It analyses the situation by math method from three parts,such as air pollution,road traffic yawp and traffic energy.On the basis of some relative rules and standards and the trends of the foreign countries,it offers some proposals for Beijing traffic development.
An analysis to the concept of the social capacity for environmental management and its estimation of the index system are provided in this paper,because the policy and law for improving the quality of the environment is important.The data from the survey is made in Beijing,and calculated by the computer software.The environmental actuality and future development of Beijing are made through the calculated outcome.Research emphasizes on the appliance of DPSIR Framework about relationship between all kinds of basic elements of the environmental management.The quality of environaental management through the concept of“service quality”in measurement of capacity is described.
After Selected on several expressways which are wide and flat around with them in Xi’an,tested the traffic noise and velpcity of single vehicle for different type.By statistical analysis,it is studied the distribution that the traffic noise and velocity of single vehicle for different type conform gauss distribution.It is showed the maximun、minimun、mean、distribution range.Compare them with experiential data,the velocity of large-type vehicles and medium-type vehicles increases and traffic noise decreases,while the velocity of small-type vehicles raise,the traffic noise of it heighten.It is illustrated that improvement the quality of roadway and increase the quantity of new vehicles and raise property of vehicles,the traffic noise and its velocity change.
“Biosolids”in the title mainly include sewage shudge and domestic wastes.Because of the mass organic matter and dewatered stability,Biosolids can be used highway construction.The using methods in two aspects are introduced,At last,the environmental risks and countermeasures are analyzed,and the development prospect is discussed.
对上海市城区快速干道、主干道和次于道等3种典型道路上的机动车行驶特征和交通状况进行试验和调查,得出了上海市城区各类道路上机动车行驶特征参数和交通密度.结果显示,上海市城区各类道路综合行驶特征为平均速度低,加减速频繁.其中又以主干道交通状况最差.文中的数据和结论不仅可以用于上海城市交通规划,而且对控制道路两旁机动车污染具有重要意义.
Sousa chinensis is the national first-class protected wild animal severely ill.Part route of the Shenzhen Tonggu channel will through the Sousa chinensis natural reserve area in Pearl River Estuary,adverse effects will be brought to Sousa chinensis.Combine with the zoological characteristics of Sousa chinensis,the impacts are analyzed,and corresponded protection counter-measures are presented.
The technical study of the natural environmental protection during the period of the construction and operation of the expressway are analyzed with Chang-Ji expressway as an example in view of the regional characteristics of western China.Then feasible process and method of environmental protection are put forward to balance the relationship between the expressway construction,and the protection of natural environment.
This thesis studies the performance of CRM on environmental protection.We put crumb rubber of different sizes and different amounts into different kinds of asphalt,and analyse the influence of the performance.And then suggests the reasonable size and amounts of crumb rubber.
By processing and investigating automobile emission’s six hundred inspection data from the tests that infection on exhaust emissions from using MMT at a concentration of 8.3 mg Mn/L in USA between 2000-2004,The investigation and statistical analysis show that comparing with Clear-fueled vehicles,the averages for THC from MMT-fueled vehicles is greater 7.74%,CO is slightly greater and NOX is lower 11.6%.About deterioration rate of THC,CO and NOX is respectively greater 118%,24.8% and 33.3%.But TWC converter efficiency is generally greater than C1ear-fueled-vehicles.
从清洁生产的定义出发,提出将清洁生产引入环境影响评价的好处,并指出环境影响评价中清洁生产的评价内容.
According to investigations on site and materials,the problems about sewage treatment methods in highway affiliated facilities were analyzed in some areas of China,and some solutions were given in this paper:The standard of sewage treatment in highway affiliated facilities should be cartied out,and a standardized market is essential.The choices of processes and designs are supposed to base on the situation on site and the development in the future;the special skills of worker and equipments facilities maintenance will be improved.In addition,some suggestions on designs of sewage treatment methods in highway affiliated facilities were proposed.
Based on Analytic Hierarchy Process and Grey Associated coefficient Method,this paper takes a demonstration study on Socioeconomic Environmental Impact for railway construction project in Xuancheng-area Huzhou-area and Hangzhou-area.The result indicates that building this railway construction project produce heavy advantage influence to Hangzhou-area on socioeconomic environsment.
鉴于完善的环境管理政策和法律法规对于保护和改善当前的环境状况的重要性,在DPSIR理论框架的基础上,分析了环境管理社会能力的概念,建立了环境管理社会能力的评价指标体系.并通过调查问卷获取数据,对数据进行整理,利用相关软件进行统计分析,得出北京市当前环境管理现状和未来发展方向.其中应用了DPSIR框架理论反映环境管理中各基本要素间的因果关系,采用了类似"服务质量"的概念体现能力估算时环境管理的质量.
