In post-reform China, local governments, instead of the central state, have become major promoters of urbanization. Differing from the existing literature based on Western theories, this article argues that a localize...In post-reform China, local governments, instead of the central state, have become major promoters of urbanization. Differing from the existing literature based on Western theories, this article argues that a localized perspective, ‘administrative urbanization', can provide a contextual explanation for the mechanism of urbanization in the reform era. The case study of Ordos indicates that new town construction, especially in the inland area, has become the main strategy for investment attraction and economic development. The local government has played a dominant role in this construction through a series of administrative measures, including avoidance of central state regulations, land leasing, high standard infrastructure construction, relocation policies and industrial attraction. This article also explores the issue of unsustainability in the new town, and identifies that underdeveloped industrialization, slow population agglomeration and real estate bubbles are primary threats to the sustainability of administrative urbanization.展开更多
In order to realize information construction on settlement of pile-group foundation of Sutong Bridge, the monitoring instruments of high-precision micro-pressure sensor and hydrostatic leveling and settlement profiler...In order to realize information construction on settlement of pile-group foundation of Sutong Bridge, the monitoring instruments of high-precision micro-pressure sensor and hydrostatic leveling and settlement profiler were integrated synthetically. A set of practical multi-scale monitoring system on settlement of super-large pile-group foundation in deep water was put forward. The reliable settlement results are obtained by means of multi-sensor data fusion. Finite element model of pile-group foundation is established. By analysis of finite element simulated calculation of pile-group foundation, rules of settlement and uneven settlement obtained by monitoring and calculation results are coincident and the absolute error of settlement between them is 4.7 mm. The research shows that it is reasonable and feasible to monitor settlement of pile-group foundation with the system, and it can provide a method for the same type pile-group foundation in deep water.展开更多
This paper analyses the composition, the overall importance of city infrastructure construction and promote the city in the process of meaning. Then analysis the importance of city traffic infrastructure construction,...This paper analyses the composition, the overall importance of city infrastructure construction and promote the city in the process of meaning. Then analysis the importance of city traffic infrastructure construction, the vanity of the city infrastructure and social infrastructure in the process of city, and puts forward relying on infrastructure construction to promote the urbanization development strategy.展开更多
The work of world crop germplasm resources are increasingly emerging the developing trend of globalization in collection scope, systematization in resources management, modernization in existing equipments, standardiz...The work of world crop germplasm resources are increasingly emerging the developing trend of globalization in collection scope, systematization in resources management, modernization in existing equipments, standardization in technical specification and informationization in shared service. This paper gives you an introduction on current situation of distribution of tropical crop germplasm resources, in-situ conservation, collection and preservation, evaluation and appraisal and innovation and utilization in china; analysis on existing key problems in protection and utilization of China＇s tropical crop germplasm resources; proposal of complementary study and collection and construction of geographical information base; reasonably layout of plantation and upgrade and preservation of equipments; development and research of related technical standards and carry-out of system evaluation and appraisal; improvement of share mechanism and efficiency; innovation and breakthrough in key points; and talents training and maintenance of work continuance, etc. Basing on these, the proposal of protection and utilization of China＇s tropical crop germplasm resources are further strengthened.展开更多
Shield machine is the major technical equipment badly in need in national infrastructure construction. The service conditions of shield machine are extremely complex. The driving interface load fluctuation caused by g...Shield machine is the major technical equipment badly in need in national infrastructure construction. The service conditions of shield machine are extremely complex. The driving interface load fluctuation caused by geological environment changes and multi field coupling of stress field may lead into imbalance of redundant drive motors output torque in main driving system. Therefore, the shield machine driving synchronous control is one of the key technologies of shield machine. This paper is in view of the shield machine main driving synchronous control, achieving the system＇s adaptive load sharing. From the point of view of cutterhead load changes, nonlinear factors of mechanical transmission mechanism and the control system synchronization performance, the authors analyze the load sharing performance of shield machine main drive system in the event of load mutation. The paper proposes a data-driven synchronized control method applicable to the main drive system. The effectiveness of the method is verified through simulation and experimental methods. The new method can make the system synchronization error greatly reduced, thus it can effectively adapt to load mutation, and reduce shaft broken accident.展开更多
Parameterizations that use mesh simplification to build the base domain always adopt the vertex removal scheme.This paper applies edge collapse to constructing the base domain instead.After inducing the parameterizati...Parameterizations that use mesh simplification to build the base domain always adopt the vertex removal scheme.This paper applies edge collapse to constructing the base domain instead.After inducing the parameterization of the original mesh over the base domain,new algorithms map the new vertices in the simplified mesh back to the original one according to the edge transition sequence to integrate the parameterization.We present a direct way,namely edge classification,to deduce the sequence.Experimental results show that the new parameterization features considerable saving in computing complexity and maintains smoothness.展开更多
基金Under the auspices of National Natural Science Foundation of China(No.41571130,41271165,41701177)Scientific Research Foundation for the Returned Overseas Chinese Scholars,State Education Ministry(No.[2015]1098)The Fundamental Research Funds for the Central Universities,Collaborative Innovation Center for Geopolitical setting of Southwest China and Borderland Development(YNNU)
文摘In post-reform China, local governments, instead of the central state, have become major promoters of urbanization. Differing from the existing literature based on Western theories, this article argues that a localized perspective, ‘administrative urbanization', can provide a contextual explanation for the mechanism of urbanization in the reform era. The case study of Ordos indicates that new town construction, especially in the inland area, has become the main strategy for investment attraction and economic development. The local government has played a dominant role in this construction through a series of administrative measures, including avoidance of central state regulations, land leasing, high standard infrastructure construction, relocation policies and industrial attraction. This article also explores the issue of unsustainability in the new town, and identifies that underdeveloped industrialization, slow population agglomeration and real estate bubbles are primary threats to the sustainability of administrative urbanization.
基金Project(2002CB412707) supported by the National Basic Research Program of ChinaProject(2006BAG04B05) supported by the National Science and Technology Pillar Program during the 11th Five-Year Plan of ChinaProject(2010B14414) supported by the Scientific Research Program of Center University in China
文摘In order to realize information construction on settlement of pile-group foundation of Sutong Bridge, the monitoring instruments of high-precision micro-pressure sensor and hydrostatic leveling and settlement profiler were integrated synthetically. A set of practical multi-scale monitoring system on settlement of super-large pile-group foundation in deep water was put forward. The reliable settlement results are obtained by means of multi-sensor data fusion. Finite element model of pile-group foundation is established. By analysis of finite element simulated calculation of pile-group foundation, rules of settlement and uneven settlement obtained by monitoring and calculation results are coincident and the absolute error of settlement between them is 4.7 mm. The research shows that it is reasonable and feasible to monitor settlement of pile-group foundation with the system, and it can provide a method for the same type pile-group foundation in deep water.
文摘This paper analyses the composition, the overall importance of city infrastructure construction and promote the city in the process of meaning. Then analysis the importance of city traffic infrastructure construction, the vanity of the city infrastructure and social infrastructure in the process of city, and puts forward relying on infrastructure construction to promote the urbanization development strategy.
文摘The work of world crop germplasm resources are increasingly emerging the developing trend of globalization in collection scope, systematization in resources management, modernization in existing equipments, standardization in technical specification and informationization in shared service. This paper gives you an introduction on current situation of distribution of tropical crop germplasm resources, in-situ conservation, collection and preservation, evaluation and appraisal and innovation and utilization in china; analysis on existing key problems in protection and utilization of China＇s tropical crop germplasm resources; proposal of complementary study and collection and construction of geographical information base; reasonably layout of plantation and upgrade and preservation of equipments; development and research of related technical standards and carry-out of system evaluation and appraisal; improvement of share mechanism and efficiency; innovation and breakthrough in key points; and talents training and maintenance of work continuance, etc. Basing on these, the proposal of protection and utilization of China＇s tropical crop germplasm resources are further strengthened.
文摘Shield machine is the major technical equipment badly in need in national infrastructure construction. The service conditions of shield machine are extremely complex. The driving interface load fluctuation caused by geological environment changes and multi field coupling of stress field may lead into imbalance of redundant drive motors output torque in main driving system. Therefore, the shield machine driving synchronous control is one of the key technologies of shield machine. This paper is in view of the shield machine main driving synchronous control, achieving the system＇s adaptive load sharing. From the point of view of cutterhead load changes, nonlinear factors of mechanical transmission mechanism and the control system synchronization performance, the authors analyze the load sharing performance of shield machine main drive system in the event of load mutation. The paper proposes a data-driven synchronized control method applicable to the main drive system. The effectiveness of the method is verified through simulation and experimental methods. The new method can make the system synchronization error greatly reduced, thus it can effectively adapt to load mutation, and reduce shaft broken accident.
基金supported by the National Natural Science Foundation of China (Nos.60273060,60333010 and 60473106)the Research Fund for the Doctoral Program of Higher Education of China (No.20030335064)
文摘Parameterizations that use mesh simplification to build the base domain always adopt the vertex removal scheme.This paper applies edge collapse to constructing the base domain instead.After inducing the parameterization of the original mesh over the base domain,new algorithms map the new vertices in the simplified mesh back to the original one according to the edge transition sequence to integrate the parameterization.We present a direct way,namely edge classification,to deduce the sequence.Experimental results show that the new parameterization features considerable saving in computing complexity and maintains smoothness.
