For studying the law of pedestrian cross-time in the signalized intersection, based on gap theory, a probability chorological discipline model of crossing pedestrians is built based on the observed data. Moreover, the...For studying the law of pedestrian cross-time in the signalized intersection, based on gap theory, a probability chorological discipline model of crossing pedestrians is built based on the observed data. Moreover, the number of pedestrians passing through in a critical gap is estimated under different conditions by three models. Then the models of pedestrian crosswalk average time, the 85th percentile pedestrian cross-time and the 90th percentile pedestrian cross-time are deduced. By quantitative analyses and the exemplification of the models, the main correlative factors acting on pedestrian cross-time are found, including the length of the crosswalk, the probability of the time-headway being less than the critical gap and the number of the turned motor vehicles in the intersection. The results indicate that the estimated errors of the models are less than 5%.展开更多
Foreign direct investment (FDI) has taken an important role in Vietnam's development process since the launch of Renovation in 1986. After Vietnam's accession to the World Trade Organization (WTO), a large amoun...Foreign direct investment (FDI) has taken an important role in Vietnam's development process since the launch of Renovation in 1986. After Vietnam's accession to the World Trade Organization (WTO), a large amount of FDI capital flowed into the country, up to 143,950.3 million USD. Wherein, there was a switching of FDI capital from the manufacturing sector to the service one in tandem with a downward trend in the agriculture. Like the previous duration, Vietnam's FDI capital sources came mostly from Asia-Pacific region and European economies (net capital, technology exporters) probably caused by Vietnam's integration emphases on dynamic Asia-Pacific region. Geographical location of FDI was characterized by a concentration on the three main key economic regions: the Red River Delta (surrounding Ha Noi, Hai Phong, and Quang Ninh), the Central region (surrounding Da Nang), and the Southeast of the country (surrounding Ho Chi Minh City) owing to good infrastructure, abundance of skillful labor force, and large market size. By constructing a gravity model, using descriptive, quantitative methods and applying them to recent data set by Vietnam's authorities and the international organizations during the period from 1995 to 2011 of 18 Vietnam's major country partners, the author finds evidence broadly consistent with the prediction that the WTO has had a positive impact on FDI flows to Vietnam.展开更多
The nominated property, Cat Ba Archipelago, includes Cat Ba Archipelago Biosphere Reserve, Cat Ba National Park, and Long Chau Island group, which belongs to Cat Hai District, Hal Phong City, Vietnam. Cat Ba Archipela...The nominated property, Cat Ba Archipelago, includes Cat Ba Archipelago Biosphere Reserve, Cat Ba National Park, and Long Chau Island group, which belongs to Cat Hai District, Hal Phong City, Vietnam. Cat Ba Archipelago represents the ongoing ecological and biological processes in the evolution and development of Asia's characteristic marine and insular ecosystems, both tropical and subtropic. The nominated property is a high biodiversity center with 3,860 species of plants and animals on islands and in the sea, of which 130 species are recorded on the Red Lists of Nationally and Internationally Threatened Species, and 76 species on the IUCN Red List of Globally Threatened Species. The iconic Cat Ba white-headed langur (Trachypithecus poliocephalus) is an endemic species indigenous to Cat Ba Archipelago where at present one population of 63 individuals only survives but nowhere else in the world. The Cat Ba white-headed langur is recognized as a critically endangered species facing an extremely high risk of extinction in the wild, thus needing urgent protection. The existence of another 20 endemic species in Cat Ba Archipelago shows that the process of evolution are on-going here, as new species continue to emerge in this unique archipelagic habitat.展开更多
As the third largest city of Viemam, Danang is an economic, cultural, social and touristic center in the central region of Vietnam. The city is becoming increasingly popular among both domestic and international touri...As the third largest city of Viemam, Danang is an economic, cultural, social and touristic center in the central region of Vietnam. The city is becoming increasingly popular among both domestic and international tourists. Its novelty natural landscapes, beautiful beach, central location and proximity to world cultural heritage sites are advantages to tourism development. Sustainable development is undoubtedly a significance objective for Danang by 2020. Accordingly, sustainable development concerns have been integrated in all economic policies, tourism management in general, and the environmental aspect in particular. The study reveals a collaboration between the city government and the accommodation businesses in dealing with environmental concems. Therefore, the purpose of the study is to provide a better understanding of the issue in Danang and then offer necessary recommendations for the city government to manage the tourism industry sustainably.展开更多
Water plays an important role in food production especially rice. Rice productivity depends greatly on sufficient water to meet evaporative demand and soil moisture. It is certain thalL rice, the most important crop o...Water plays an important role in food production especially rice. Rice productivity depends greatly on sufficient water to meet evaporative demand and soil moisture. It is certain thalL rice, the most important crop of Thailand and Vietnam, is vulnerable to climate change. This paper proposes an analysis on the impact of climate on rice water requirement and food security in Thailand and Vietnam. Water demand, yield and production of rice were computed under the changed surface air temperature for three time slices, namely 2020s, 2050s and 2080s. Food security was analyzed from rice supply (calculated milled-rice product, rice stock, and imports) and demand (domestic uses from population growth, exports to world market, domestic seed and other uses). The result showed that, under the higher surface air temperature scenario, water requirement office in Thailand and Vietnam could increase by 1.8 times in the end of the 21 st century. Production of rice dropped by declined yield. Thailand and Vietnam which is the world largest rice exporter in last decades will face the rice shortage in 2080s and 2030s respectively.展开更多
基金The National Natural Science Foundation of China(No.50778141)the National Basic Research Program of China(973Program)(No.2006CB705505)National Key Technology R&D Program during the11th Five Year Plan of China(No.2006BAJ18B07)
文摘For studying the law of pedestrian cross-time in the signalized intersection, based on gap theory, a probability chorological discipline model of crossing pedestrians is built based on the observed data. Moreover, the number of pedestrians passing through in a critical gap is estimated under different conditions by three models. Then the models of pedestrian crosswalk average time, the 85th percentile pedestrian cross-time and the 90th percentile pedestrian cross-time are deduced. By quantitative analyses and the exemplification of the models, the main correlative factors acting on pedestrian cross-time are found, including the length of the crosswalk, the probability of the time-headway being less than the critical gap and the number of the turned motor vehicles in the intersection. The results indicate that the estimated errors of the models are less than 5%.
文摘Foreign direct investment (FDI) has taken an important role in Vietnam's development process since the launch of Renovation in 1986. After Vietnam's accession to the World Trade Organization (WTO), a large amount of FDI capital flowed into the country, up to 143,950.3 million USD. Wherein, there was a switching of FDI capital from the manufacturing sector to the service one in tandem with a downward trend in the agriculture. Like the previous duration, Vietnam's FDI capital sources came mostly from Asia-Pacific region and European economies (net capital, technology exporters) probably caused by Vietnam's integration emphases on dynamic Asia-Pacific region. Geographical location of FDI was characterized by a concentration on the three main key economic regions: the Red River Delta (surrounding Ha Noi, Hai Phong, and Quang Ninh), the Central region (surrounding Da Nang), and the Southeast of the country (surrounding Ho Chi Minh City) owing to good infrastructure, abundance of skillful labor force, and large market size. By constructing a gravity model, using descriptive, quantitative methods and applying them to recent data set by Vietnam's authorities and the international organizations during the period from 1995 to 2011 of 18 Vietnam's major country partners, the author finds evidence broadly consistent with the prediction that the WTO has had a positive impact on FDI flows to Vietnam.
文摘The nominated property, Cat Ba Archipelago, includes Cat Ba Archipelago Biosphere Reserve, Cat Ba National Park, and Long Chau Island group, which belongs to Cat Hai District, Hal Phong City, Vietnam. Cat Ba Archipelago represents the ongoing ecological and biological processes in the evolution and development of Asia's characteristic marine and insular ecosystems, both tropical and subtropic. The nominated property is a high biodiversity center with 3,860 species of plants and animals on islands and in the sea, of which 130 species are recorded on the Red Lists of Nationally and Internationally Threatened Species, and 76 species on the IUCN Red List of Globally Threatened Species. The iconic Cat Ba white-headed langur (Trachypithecus poliocephalus) is an endemic species indigenous to Cat Ba Archipelago where at present one population of 63 individuals only survives but nowhere else in the world. The Cat Ba white-headed langur is recognized as a critically endangered species facing an extremely high risk of extinction in the wild, thus needing urgent protection. The existence of another 20 endemic species in Cat Ba Archipelago shows that the process of evolution are on-going here, as new species continue to emerge in this unique archipelagic habitat.
文摘As the third largest city of Viemam, Danang is an economic, cultural, social and touristic center in the central region of Vietnam. The city is becoming increasingly popular among both domestic and international tourists. Its novelty natural landscapes, beautiful beach, central location and proximity to world cultural heritage sites are advantages to tourism development. Sustainable development is undoubtedly a significance objective for Danang by 2020. Accordingly, sustainable development concerns have been integrated in all economic policies, tourism management in general, and the environmental aspect in particular. The study reveals a collaboration between the city government and the accommodation businesses in dealing with environmental concems. Therefore, the purpose of the study is to provide a better understanding of the issue in Danang and then offer necessary recommendations for the city government to manage the tourism industry sustainably.
文摘Water plays an important role in food production especially rice. Rice productivity depends greatly on sufficient water to meet evaporative demand and soil moisture. It is certain thalL rice, the most important crop of Thailand and Vietnam, is vulnerable to climate change. This paper proposes an analysis on the impact of climate on rice water requirement and food security in Thailand and Vietnam. Water demand, yield and production of rice were computed under the changed surface air temperature for three time slices, namely 2020s, 2050s and 2080s. Food security was analyzed from rice supply (calculated milled-rice product, rice stock, and imports) and demand (domestic uses from population growth, exports to world market, domestic seed and other uses). The result showed that, under the higher surface air temperature scenario, water requirement office in Thailand and Vietnam could increase by 1.8 times in the end of the 21 st century. Production of rice dropped by declined yield. Thailand and Vietnam which is the world largest rice exporter in last decades will face the rice shortage in 2080s and 2030s respectively.