In order to solve the urgent problem of how to manage and sustain highway tunnels with advanced information technology with the background of the rapid development in the modem traffic, and achieve the cost- effective...In order to solve the urgent problem of how to manage and sustain highway tunnels with advanced information technology with the background of the rapid development in the modem traffic, and achieve the cost- effectiveness optimal principle objectives under the premise of guaranteeing a smooth flow of traffic; a highway tunnel maintenance and management system framework and the key modules were proposed. First, the determined highway tunnel condition assessment index system was established according to the result of expert consulting forms. Secondly, the tunnel diseases, the corresponding maintenance measurements, and many-to-many relationship between diseases and maintenance measurements were introduced. Then, three kinds of 0-1 integer programming models were built according to different tunnel operators＇ needs in the optimization decision module. Finally, the further development and implementation of the system was prospected. The research results can provide references to tunnel researchers and managers.展开更多
An assessment index model was established to evaulate the benefit of the Three-Gorges Reservoir migration through the analytical hierarchy process. Totally 43 indicators were selected to assess the impact of migration...An assessment index model was established to evaulate the benefit of the Three-Gorges Reservoir migration through the analytical hierarchy process. Totally 43 indicators were selected to assess the impact of migration on the economic, social and ecological environmental aspects of the migration communities, with the data of the indicators of the years 1992, 1998, 2002 which represented the period of premigration, the end of the first phase migration and the end of the second phase migration, respectively. The evaluation matrix is sufficiently consistent, with a consistency ratio CR equal to 0.086 3. The assessment turned out a benefit value for the economic subsystem in the year 2004 larger than triple the value in the year 1992, indicating a remarkable economic growth in the Reservoir area. The constantly increasing value for the social subsystem reflects the stable social situations. There is a slight decline in the assessment outcome of the ecological subsystem for the year 1998, which implies enviromental conservation was given insufficient importance during that period. On the whole, the implementation of the migration project is favorable to the Reservoir region, as confirmed by the stably increasing overall evaluation value from 42.22% in 1992 to 68.81% in 2002. However, there is still much room to improve from the status quo to the target criteria.展开更多
The BHAP （Bruce Highway Action Plan） Program Evaluation was a momentous task conducted in most part by the TMR （Transport and Main Roads） CBA （cost benefit analysis） team. The evaluation included 189 overtaking ...The BHAP （Bruce Highway Action Plan） Program Evaluation was a momentous task conducted in most part by the TMR （Transport and Main Roads） CBA （cost benefit analysis） team. The evaluation included 189 overtaking lanes, 404 km of road widening and shoulder sealing in various places between Brisbane and Cairns, 56 capacity focused projects and 16 flood immunity focused projects. The total projected capital costs of all projects proposed as part of the BHAP amounted to over 16 billion dollars. The program evaluation conducted, due to the short timeframes, lack of available data and strategic nature of the plan, has been ＂coined＂ a strategic evaluation. This paper focuses on the methodology applied to the projects proposed in the BHAP. A TMR designed project/program evaluation model （CARP （Concise Analysis of Road Programs） V1.0） was used to evaluate the majority of the proposed BHAP projects. The model produces streams of discounted benefits and costs of the projects and program using limited and incomplete data. The large scale of work and the close proximity of projects allowed for an integrated approach to the analysis, which considered the impact projects have on each other. The result of the program, if all evaluated projects are included, is a BCR （benefit cost ratio） of approximately 0.7l at a discount rate of 7%. If the less viable projects are removed from the program, the program can obtain a benefit cost ratio of greater than 1 with a sufficiently large number of projects remaining.展开更多
The Globally Important Agricultural Heritage Systems （GIAHS） initiative was launched by the Food and Agriculture Organization （FAO） of the United Nations in 2002 with the aim of establishing the basis for the glob...The Globally Important Agricultural Heritage Systems （GIAHS） initiative was launched by the Food and Agriculture Organization （FAO） of the United Nations in 2002 with the aim of establishing the basis for the global recognition,dynamic conservation and adaptive management of outstanding traditional agricultural systems and their associated landscapes,biodiversity,knowledge systems and cultures.There is anecdotal evidence that designated GIAHS are economically better than non-GIAHS sites.However,there have not been done an economic analysis to prove this.Nor are any sophisticated economic performance criteria for GIAHS in place for a continuously monitoring of the functioning.Therefore,the main objective of this study is to conduct an economic valuation for a GIAHS system versus a similar non designated GIAHS system.For this,a Cost-Benefit Analysis （CBA） is chosen.The major constraint is the data availability.Therefore,a framework for economic analysis shall be developed with the intention to provide directions,assumptions,and data requirement to carry out an economic analysis and so give guidance on future inclusion of economic valuations of GIAHS.Theconceptual framework for economic assessment will use the Rice-Fish pilot site in China as a case study.The example calculations on the rice-fish co-culture （RFC） have to be taken cautiously due to data availability on different activities （tourism,marketed products on local and international markets） as well as comparison to similar systems.展开更多
More than 87000 dams have been built in China,and about one third of them are risky projects.A number of high and ultra-high dams are being constructed in China's western region.The current dam construction practi...More than 87000 dams have been built in China,and about one third of them are risky projects.A number of high and ultra-high dams are being constructed in China's western region.The current dam construction practice tends to focus on socio-economic benefits and neglect the environment and ecology.Furthermore,periodic examinations are intended to ensure the structural safety of dams.This paper proposes a general evaluation principle for dam service.This principle stipulates that dam projects should have maximum socio-economic benefits and minimum negative effects on the environment and ecology.To satisfy the general principle of mutual harmony,socio-economic benefits,dam safety,environment,and ecology are analyzed,and the evaluation methods for dam service status are discussed.Then,a fusion algorithm of interlayer assessment is proposed on the basis of evidence theory and the fuzzy comprehensive analysis method.Finally,a comprehensive evaluation model is established.Example analysis shows that the proposed theories and methods can fulfill scientific assessment of the service status of dams.展开更多
基金The US National Science Foundation(No.CM M I-0408390,CM M I-0644552)the National Natural Science Foundation of China(No.U1134206,51250110075,51150110478)+1 种基金the Western Project of M inistry of Communications of China(No.0901005C)the Natural Science Foundation of Jiangsu Province(No.BK200910046)
文摘In order to solve the urgent problem of how to manage and sustain highway tunnels with advanced information technology with the background of the rapid development in the modem traffic, and achieve the cost- effectiveness optimal principle objectives under the premise of guaranteeing a smooth flow of traffic; a highway tunnel maintenance and management system framework and the key modules were proposed. First, the determined highway tunnel condition assessment index system was established according to the result of expert consulting forms. Secondly, the tunnel diseases, the corresponding maintenance measurements, and many-to-many relationship between diseases and maintenance measurements were introduced. Then, three kinds of 0-1 integer programming models were built according to different tunnel operators＇ needs in the optimization decision module. Finally, the further development and implementation of the system was prospected. The research results can provide references to tunnel researchers and managers.
基金Funded by the Natural Science Foundation of China under the Grant No. 10471159.
文摘An assessment index model was established to evaulate the benefit of the Three-Gorges Reservoir migration through the analytical hierarchy process. Totally 43 indicators were selected to assess the impact of migration on the economic, social and ecological environmental aspects of the migration communities, with the data of the indicators of the years 1992, 1998, 2002 which represented the period of premigration, the end of the first phase migration and the end of the second phase migration, respectively. The evaluation matrix is sufficiently consistent, with a consistency ratio CR equal to 0.086 3. The assessment turned out a benefit value for the economic subsystem in the year 2004 larger than triple the value in the year 1992, indicating a remarkable economic growth in the Reservoir area. The constantly increasing value for the social subsystem reflects the stable social situations. There is a slight decline in the assessment outcome of the ecological subsystem for the year 1998, which implies enviromental conservation was given insufficient importance during that period. On the whole, the implementation of the migration project is favorable to the Reservoir region, as confirmed by the stably increasing overall evaluation value from 42.22% in 1992 to 68.81% in 2002. However, there is still much room to improve from the status quo to the target criteria.
文摘The BHAP （Bruce Highway Action Plan） Program Evaluation was a momentous task conducted in most part by the TMR （Transport and Main Roads） CBA （cost benefit analysis） team. The evaluation included 189 overtaking lanes, 404 km of road widening and shoulder sealing in various places between Brisbane and Cairns, 56 capacity focused projects and 16 flood immunity focused projects. The total projected capital costs of all projects proposed as part of the BHAP amounted to over 16 billion dollars. The program evaluation conducted, due to the short timeframes, lack of available data and strategic nature of the plan, has been ＂coined＂ a strategic evaluation. This paper focuses on the methodology applied to the projects proposed in the BHAP. A TMR designed project/program evaluation model （CARP （Concise Analysis of Road Programs） V1.0） was used to evaluate the majority of the proposed BHAP projects. The model produces streams of discounted benefits and costs of the projects and program using limited and incomplete data. The large scale of work and the close proximity of projects allowed for an integrated approach to the analysis, which considered the impact projects have on each other. The result of the program, if all evaluated projects are included, is a BCR （benefit cost ratio） of approximately 0.7l at a discount rate of 7%. If the less viable projects are removed from the program, the program can obtain a benefit cost ratio of greater than 1 with a sufficiently large number of projects remaining.
基金FAO/GEF project(GCP/GLO/212/GEF)National Public Benefit(Environmental) Research Foundation of China(201009020)Chinese Academy of Sciences Visiting Professorship for Senior International Scientists(Grant No.Y0S00100KD)
文摘The Globally Important Agricultural Heritage Systems （GIAHS） initiative was launched by the Food and Agriculture Organization （FAO） of the United Nations in 2002 with the aim of establishing the basis for the global recognition,dynamic conservation and adaptive management of outstanding traditional agricultural systems and their associated landscapes,biodiversity,knowledge systems and cultures.There is anecdotal evidence that designated GIAHS are economically better than non-GIAHS sites.However,there have not been done an economic analysis to prove this.Nor are any sophisticated economic performance criteria for GIAHS in place for a continuously monitoring of the functioning.Therefore,the main objective of this study is to conduct an economic valuation for a GIAHS system versus a similar non designated GIAHS system.For this,a Cost-Benefit Analysis （CBA） is chosen.The major constraint is the data availability.Therefore,a framework for economic analysis shall be developed with the intention to provide directions,assumptions,and data requirement to carry out an economic analysis and so give guidance on future inclusion of economic valuations of GIAHS.Theconceptual framework for economic assessment will use the Rice-Fish pilot site in China as a case study.The example calculations on the rice-fish co-culture （RFC） have to be taken cautiously due to data availability on different activities （tourism,marketed products on local and international markets） as well as comparison to similar systems.
基金supported by the National Natural Science Foundation of China (Grant Nos. 51139001,51179066,51079046,50909041)the Program for New Century Excellent Talents in University (Grant No. NCET-10-0359)+1 种基金Jiangsu Province "333 High-Level Personnel Training Project" (Grant No. 2017-B08037)the Ministry of Water Resources Public Welfare Industry Research Special Fund Project (Grant No. 201201038)
文摘More than 87000 dams have been built in China,and about one third of them are risky projects.A number of high and ultra-high dams are being constructed in China's western region.The current dam construction practice tends to focus on socio-economic benefits and neglect the environment and ecology.Furthermore,periodic examinations are intended to ensure the structural safety of dams.This paper proposes a general evaluation principle for dam service.This principle stipulates that dam projects should have maximum socio-economic benefits and minimum negative effects on the environment and ecology.To satisfy the general principle of mutual harmony,socio-economic benefits,dam safety,environment,and ecology are analyzed,and the evaluation methods for dam service status are discussed.Then,a fusion algorithm of interlayer assessment is proposed on the basis of evidence theory and the fuzzy comprehensive analysis method.Finally,a comprehensive evaluation model is established.Example analysis shows that the proposed theories and methods can fulfill scientific assessment of the service status of dams.
