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| 1 | Spatial Interaction and Network Structure Evolvement of Cities in Terms of China's Rail Passenger Flows显示文摘Cities separated in space are connected together by spatial interaction (SI) between them. But the studies focusing on the SI are relatively few in China mainly because of the scarcity of data. This paper deals with the SI in terms of rail passenger flows, which is an important aspect of the network structure of urban agglomeration. By using a data set consisting of rail O-D (origin-destination) passenger flows among nearly 200 cities, intercity rail distance O-D matrixes, and some other indices, it is found that the attenuating tendency of rail passenger is obvious. And by the analysis on dominant flows and spatial structure of flows, we find that passenger flows have a trend of polarizing to hubs while the linkages between hubs upgrade. However, the gravity model reveals an overall picture of convergence process over time which is not in our expectation of integration process in the framework of globalization and economic integration. Some driven factors for the re-organization process of the structure of urban agglomeration, such as technique advance, globalization, etc. are discussed further based on the results we obtained. | DAI Teqi JIN Fengjun | 2008 | Chinese Geographical Science2008，18，3： | 11 |
| 2 | Assessment of Industrial Land Use Intensity: A Case Study of Beijing Economic-technological Development Area显示文摘In recent years, great economic output of land has been achieved in economic-technological development areas in China, but the intensity of land use in some of these areas is very low. The degree of the low intensity of land use needs to be evaluated. The current method of comprehensive evaluation and grading by one index system has the limitations due to the existence of differences between regions and industries. This paper evaluates industrial land use intensity by Total Factor Productivity (TFP) analysis, which not only measures the intensity but also illustrates the ef-ficiency of input factors. This method is applied to the Beijing Economic-technological Development Area (BDA). A comparison analysis on factor use efficiency and input structure of capital and labor between industries is also carried out in the absence of a labor-income ratio. | HUANG Daquan WAN Wei DAI Teqi LIANG Jinshe | 2011 | Chinese Geographical Science2011，21，2： | 3 |
| 3 | Ecological Network Analysis Quantifying the Sustainability of Regional Economies: A Case Study of Guangdong Province in China显示文摘To meet the challenge of sustainable development, sustainability must be made. Ecological network analysis(ENA) was introduced in this paper as an approach to quantitatively measure the growth, development, and sustainability of an economic system. The Guangdong economic networks from 1987 to 2010 were analyzed by applying the ENA approach. Firstly, a currency flow network among economic sectors was constructed to represent the Guangdong economic system by adapting the input-output(I-O) table data. Then, the network indicators from the ENA framework involving the total system throughput(TST), average mutual information(AMI), ascendency(A), redundancy(R) and development capacity(C) were calculated. Lastly, the network indicators were analyzed to acquire the overall features of Guangdong's economic operations during 1987–2010. The results are as follows: the trends of the network indicators show that the size of the Guangdong economic network grows exponentially at a high rate during 1987–2010, whereas its efficiency does not present a clear trend over its whole period. The growth is the main characteristic of the Guangdong economy during 1987–2010, with no clear evidence regarding its development. The quantitative results of the network also confirmed that the growth contributed to a great majority of the Guangdong economy during 1987–2010, whereas the development's contribution was tiny during the same period. The average value of the sustainability indicator(α) of the Guangdong economic network was 0.222 during 1987–2010, which is less than the theoretically optimal value of 0.37 for a sustainable human-influenced system. The results suggest that the Guangdong economic system needs a further autocatalysis to improve its efficiency to support the system maintaining a sustainable evolvement. | LIANG Jinshe HU Ke DAI Teqi | 2018 | Chinese Geographical Science2018，28，1： | 2 |
| 4 | Landscape fragmentation associated with the Qingzang Highway and its influencing factors-A comparison study on road sections and buffers显示文摘Many studies have examined the effect of roads on landscape fragmentation.Yet they rarely considered local characteristics of the road and road buffer widths.Therefore,this study that took place in the Qingzang Highway(QH)examined the variations in road buffers and road sections of landscape fragmentation.The QH was divided into 32 sections with 23 buffer areas.Based on the indicators of landscape fragmentation from 1980 to 2018,we found significant spatial heterogeneity between sections and buffers.Generally,landscape fragmentation de-creased with increasing buffer distance to the QH.For different sections,the coefficients of variation between buffers were rather high and significantly different.Therefore,fixed-width buffers may overestimate or underes-timate the spatial scope and influence intensity of a road.The impacts of road sections around provincial capitals,prefecture-level cities and main counties on landscape fragmentation were relatively extensive and formed clus-ters of highly fragmented areas.Geodetector results indicated that natural and anthropogenic factors,such as altitude,climate,distance to major settlements and socioeconomic conditions,could well explain the spatiotem-poral characteristics of landscape fragmentation.Altitude,precipitation and the distance to major settlements had higher explanatory power for landscape fragmentation in permafrost regions,whereas slope and socioeconomic condition had higher explanatory power for non-permafrost regions in Xizang Autonomous Region. | Yi Miao Teqi Dai Xingdou Yang Jinping Song | 2021 | Geography and Sustainability2021，2，1： | 1 |
| 5 | A Bi-modal Model for Chinese Cities: City Size, Car Use and Land Rent显示文摘China is experiencing rapid urbanization and motorization. Urban transport congestion poses a challenge to the cities of China. Policies have been made trying to control the car use and the land use in Chinese cities without sound modelling researches. The existing literature on monocentric city modelling has shown that the parameters are critical for the outcome of the modelling. Following the Alonso-type monocentric model, this paper introduces a bi-modal model to simulate the city size, the distribution of land rent and the modal substitution in Chinese cities. We set the key parameters according to the recent available data of China′s cities, and re-explain the hypothesis of the model. Then we make a sensitivity analysis to reveal the impacts of key parameters on the Chinese cities. According to the results, we find that the wage, the price of car use and the agriculture rent have significant impacts on city size. The land supply for the private transport or the public transport has the strongest impacts on car use and the level of transport congestion. The total population of the city and the wage level have strong impacts on land rent. Some results are counter-intuitive, but explainable. We also discuss implication of these results for policy making. | DAI Teqi WANG Liang ZHOU Binxue | 2016 | Chinese Geographical Science2016，26，5： | 0 |
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