In the engineering database system, multiple versions of a design including engineering drawings should be managed efficiently. The paper proposes an efficient spatial data structure, that is an expansion of the R tre...In the engineering database system, multiple versions of a design including engineering drawings should be managed efficiently. The paper proposes an efficient spatial data structure, that is an expansion of the R tree and HR tree, for version management of engineering drawings. A novel mechanism to manage the difference between drawings is introduced to the HR tree to eliminate redundant duplications and to reduce the amount of storage required for the data structure. Data management mechanism and structural properties of our data structure called the MVR + tree are described.展开更多
This paper presents a basis for the space of hyperbolic polynomials Γm=span{1, sht, cht, sh2t, ch2t, …, shmt, chmt} on the interval [0,α] from an extended Tchebyshev system, which is analogous to the Bernstein basi...This paper presents a basis for the space of hyperbolic polynomials Γm=span{1, sht, cht, sh2t, ch2t, …, shmt, chmt} on the interval [0,α] from an extended Tchebyshev system, which is analogous to the Bernstein basis for the space of polynomial used as a kind of well-known tool for free-form curves and surfaces in Computer Aided Geometry Design. Then from this basis, we construct quasi Bézier curves and discuss some of their properties. At last, we give an example and extend the range of the pa- rameter variable t to arbitrary close interval [r, s] (r<s).展开更多
[ 篇名 ] Computer aided design of an axial-field PM brushless DC motor for an electric vehicle，[ 篇名 ] Concept of the “KAZ”, the Start of a New Generation in Car Design，[ 篇名 ] Conceptual Design of Hybrid Electr...[ 篇名 ] Computer aided design of an axial-field PM brushless DC motor for an electric vehicle，[ 篇名 ] Concept of the “KAZ”, the Start of a New Generation in Car Design，[ 篇名 ] Conceptual Design of Hybrid Electric Vehicle for Urban Use in China，[ 篇名 ] Consumer Education - An Essential Element in the Acceptance of the Electric Vehicle，[ 篇名 ] Control and Management Strategies for the Delphi High Power Lithium Battery，[ 篇名 ] Control of a Continuously Operated Pole-Changing Induction Machine，[ 篇名 ] Control of compact hybrid drive consisting of PM motor and planetary transmission CVT，[ 篇名 ] Control of independent rear wheel drives for electric and hybrid vehicles using one neuro-fuzzy controller，[ 篇名 ] Controller-induced parasitic torque ripples in a PM synchronous motor，[ 篇名 ] Coordination of Charging Stations for Electric Vehicles，[ 篇名 ] Coupled Electrochemical and Thermal Analysis of Electric-Vehicle Battery Modules，[ 篇名 ] Current Activities of Standardisation in Japan，[ 篇名 ] Current Status Report on U.S. Department of Energy Electric and Hybrid Electric Vehicle Energy Storage R&D Programs，[ 篇名 ] Current-mode control for sensorless BDCM drive with intelligent commutation tuning，[ 篇名 ] DaimlerChrysler EPIC Minivan Powered by Lithium-Ion Batteries，[ 篇名 ] Design and analysis of a new multiphase polygonal-winding permanent-magnet brushless DC machine，[ 篇名 ] Design and development of the 2001 Michigan Tech FutureTruck, a power-split hybrid electric vehicle，[ 篇名 ] Design and development of the 2002 Comell University hybrid electric vehicle，[ 篇名 ] Design and development of the 2002 Michigan Tech FutureTruck, a parallel hybrid electric vehicle，[ 篇名 ] Design and development of the 2002 Penn State University parallel hybrid electric explorer, the Wattmuncher。展开更多
文摘In the engineering database system, multiple versions of a design including engineering drawings should be managed efficiently. The paper proposes an efficient spatial data structure, that is an expansion of the R tree and HR tree, for version management of engineering drawings. A novel mechanism to manage the difference between drawings is introduced to the HR tree to eliminate redundant duplications and to reduce the amount of storage required for the data structure. Data management mechanism and structural properties of our data structure called the MVR + tree are described.
基金Project supported by the National Natural Science Foundation of China (No. 60473130) and the National Basic Research Program (973) of China (No. 2004CB318000)
文摘This paper presents a basis for the space of hyperbolic polynomials Γm=span{1, sht, cht, sh2t, ch2t, …, shmt, chmt} on the interval [0,α] from an extended Tchebyshev system, which is analogous to the Bernstein basis for the space of polynomial used as a kind of well-known tool for free-form curves and surfaces in Computer Aided Geometry Design. Then from this basis, we construct quasi Bézier curves and discuss some of their properties. At last, we give an example and extend the range of the pa- rameter variable t to arbitrary close interval [r, s] (r<s).
文摘[ 篇名 ] Computer aided design of an axial-field PM brushless DC motor for an electric vehicle，[ 篇名 ] Concept of the “KAZ”, the Start of a New Generation in Car Design，[ 篇名 ] Conceptual Design of Hybrid Electric Vehicle for Urban Use in China，[ 篇名 ] Consumer Education - An Essential Element in the Acceptance of the Electric Vehicle，[ 篇名 ] Control and Management Strategies for the Delphi High Power Lithium Battery，[ 篇名 ] Control of a Continuously Operated Pole-Changing Induction Machine，[ 篇名 ] Control of compact hybrid drive consisting of PM motor and planetary transmission CVT，[ 篇名 ] Control of independent rear wheel drives for electric and hybrid vehicles using one neuro-fuzzy controller，[ 篇名 ] Controller-induced parasitic torque ripples in a PM synchronous motor，[ 篇名 ] Coordination of Charging Stations for Electric Vehicles，[ 篇名 ] Coupled Electrochemical and Thermal Analysis of Electric-Vehicle Battery Modules，[ 篇名 ] Current Activities of Standardisation in Japan，[ 篇名 ] Current Status Report on U.S. Department of Energy Electric and Hybrid Electric Vehicle Energy Storage R&D Programs，[ 篇名 ] Current-mode control for sensorless BDCM drive with intelligent commutation tuning，[ 篇名 ] DaimlerChrysler EPIC Minivan Powered by Lithium-Ion Batteries，[ 篇名 ] Design and analysis of a new multiphase polygonal-winding permanent-magnet brushless DC machine，[ 篇名 ] Design and development of the 2001 Michigan Tech FutureTruck, a power-split hybrid electric vehicle，[ 篇名 ] Design and development of the 2002 Comell University hybrid electric vehicle，[ 篇名 ] Design and development of the 2002 Michigan Tech FutureTruck, a parallel hybrid electric vehicle，[ 篇名 ] Design and development of the 2002 Penn State University parallel hybrid electric explorer, the Wattmuncher。
