Urban transportation is a major element of sustainable urban development and a key factor affecting the health of urban residents.It influences public health through noise,air pollution,social isolation,inactive modes...Urban transportation is a major element of sustainable urban development and a key factor affecting the health of urban residents.It influences public health through noise,air pollution,social isolation,inactive modes of transportation,and sedentary behaviors.This paper reviews literature related to urban transportation and health from two perspectives:travel behavior and environmental impact.It focuses on passenger transportation and freight transportation to analyze their respective negative environmental externalities,such as noise,environmental pollution,and accidents.After the literature review,the paper identifies the main deficiencies in urban transportation research aiming to build healthy cities,and proposes measures and suggestions for future research.展开更多
This study addresses a new charging station network planning problem for smart connected electric vehicles.We embed a charging station choice model into a charging network planning model that explicitly considers the ...This study addresses a new charging station network planning problem for smart connected electric vehicles.We embed a charging station choice model into a charging network planning model that explicitly considers the heterogeneity of the charging behavior in a data-driven manner.To cope with the deficiencies from a small size and sparse behavioral data,we propose a robust charging demand prediction method that can significantly reduce the impact of sample errors and missing data.On the basis of these two building blocks,we form and solve a new optimal charging station location and capacity problem by minimizing the construction and charging costs while considering the charging service level,construction budget,and limit to the number of chargers.We use a case study of planning charging stations in Shanghai to validate our contributions and provide managerial insight in this area.展开更多
Because of abundant reserves and renewable and environmentally friendly properties,the utilization of woody biomass waste in road engineering can alleviate the shortage of fossil fuels and carbon emissions so as to mi...Because of abundant reserves and renewable and environmentally friendly properties,the utilization of woody biomass waste in road engineering can alleviate the shortage of fossil fuels and carbon emissions so as to mitigate global climate change and achieve sustainable development of road engineering.This paper synthesizes the state of the art about the strategies of applying five kinds of resources derived from waste woody biomass,including biochar,bio-oil,lignin,wood ash and nanocellulose to road construction.Based on the characteristics analysis of the five materials,it can be concluded that biochar can comprehensively improve the road performance of asphalt and its mixtures,and has the potential of runoff purification;bio-oil can soften asphalt and improve its lowtemperature performance,but has negative effects on high-temperature performance;lignin increases the asphalt ageing resistance and can be used as a regenerant,and will improve the overall performance of asphalt mixtures if combined with other modifiers;wood ash can increase subgrade bearing capacity and bring significant environmental benefits;nanocellulose improves the strength of cement mortar,but there is a lack of research on its effects on performance of pavement materials and the interaction mechanism;the lifecycle environmental and economic assessment of woody biomass-modified road materials is not comprehensive.Moreover,prospects were also summarized to show the opportunities for future study,such as the establishment of a database for biomass.This review provides useful insights for the utilization of woody biomass as road materials to achieve waste management and sustainable development.展开更多
文摘Urban transportation is a major element of sustainable urban development and a key factor affecting the health of urban residents.It influences public health through noise,air pollution,social isolation,inactive modes of transportation,and sedentary behaviors.This paper reviews literature related to urban transportation and health from two perspectives:travel behavior and environmental impact.It focuses on passenger transportation and freight transportation to analyze their respective negative environmental externalities,such as noise,environmental pollution,and accidents.After the literature review,the paper identifies the main deficiencies in urban transportation research aiming to build healthy cities,and proposes measures and suggestions for future research.
基金the National Natural Science Founda-tion of China(Nos.72171175,and 72021102)。
文摘This study addresses a new charging station network planning problem for smart connected electric vehicles.We embed a charging station choice model into a charging network planning model that explicitly considers the heterogeneity of the charging behavior in a data-driven manner.To cope with the deficiencies from a small size and sparse behavioral data,we propose a robust charging demand prediction method that can significantly reduce the impact of sample errors and missing data.On the basis of these two building blocks,we form and solve a new optimal charging station location and capacity problem by minimizing the construction and charging costs while considering the charging service level,construction budget,and limit to the number of chargers.We use a case study of planning charging stations in Shanghai to validate our contributions and provide managerial insight in this area.
基金supported by the National Key Research and Development Program of China (No.2018YFB1600100)the Fundamental Research Funds for the Central Universities (No.22120210027).
文摘Because of abundant reserves and renewable and environmentally friendly properties,the utilization of woody biomass waste in road engineering can alleviate the shortage of fossil fuels and carbon emissions so as to mitigate global climate change and achieve sustainable development of road engineering.This paper synthesizes the state of the art about the strategies of applying five kinds of resources derived from waste woody biomass,including biochar,bio-oil,lignin,wood ash and nanocellulose to road construction.Based on the characteristics analysis of the five materials,it can be concluded that biochar can comprehensively improve the road performance of asphalt and its mixtures,and has the potential of runoff purification;bio-oil can soften asphalt and improve its lowtemperature performance,but has negative effects on high-temperature performance;lignin increases the asphalt ageing resistance and can be used as a regenerant,and will improve the overall performance of asphalt mixtures if combined with other modifiers;wood ash can increase subgrade bearing capacity and bring significant environmental benefits;nanocellulose improves the strength of cement mortar,but there is a lack of research on its effects on performance of pavement materials and the interaction mechanism;the lifecycle environmental and economic assessment of woody biomass-modified road materials is not comprehensive.Moreover,prospects were also summarized to show the opportunities for future study,such as the establishment of a database for biomass.This review provides useful insights for the utilization of woody biomass as road materials to achieve waste management and sustainable development.
