This paper examines the generic structure of dissertation acknowledgements accompanying 168 M.A. and Ph.D. dissertations written by native speakers of Chinese in a variety of majors of two disciplines （humanity and s...This paper examines the generic structure of dissertation acknowledgements accompanying 168 M.A. and Ph.D. dissertations written by native speakers of Chinese in a variety of majors of two disciplines （humanity and social science） at Chinese universities. It attempts to find out the relationship between the variables, such as gender, seniority, publishing experience, the length and the generic structure of dissertation acknowledgements.展开更多
An analysis was conducted on the evolutional process of a mesoscale convective vortex （MCV） and associated heavy rainfall in the Dabie Mountain area on 21-22 June 2008,as well as their structural characteristics in ...An analysis was conducted on the evolutional process of a mesoscale convective vortex （MCV） and associated heavy rainfall in the Dabie Mountain area on 21-22 June 2008,as well as their structural characteristics in different stages,by using the mesoscale reanalysis data with 3 km and 1 h resolution generated by the Local Analysis and Prediction System （LAPS） in the Southern China Heavy Rainfall Experiment.The results showed that the latent heat released by convection in the midtroposphere was the main energy source for the development of a low-level vortex.There was a positive feedback interaction between the convection and the vortex,and the evolution of the MCV was closely related to the strength of the positive interaction.The most typical characteristics of the thermal structure in different stages were that,there was a relatively thin diabatic heating layer in the midtroposphere in the formative stage;the thickness of diabatic heating layer significantly increased in the mature stage;and it almost disappeared in the decay stage.The characteristics of the dynamic structure were that,in the formative stage,there was no anticyclonic circulation at the high level;in the mature stage,an anticyclonic circulation with strong divergence was formed at the high level;in the decay stage,the anticyclonic circulation was damaged and the high-level atmosphere was in a disordered state of turbulence.Finally,the structural schematics of the MCV in the formative and mature stage were established respectively.展开更多
This work introduces a scalable and efficient topological structure for tetrahedral and hexahedral meshes. The design of the data structure aims at maximal flexibility and high performance. It provides a high scalabil...This work introduces a scalable and efficient topological structure for tetrahedral and hexahedral meshes. The design of the data structure aims at maximal flexibility and high performance. It provides a high scalability by using hierarchical representa-tions of topological elements. The proposed data structure is array-based, and it is a compact representation of the half-edge data structure for volume elements and half-face data structure for volumetric meshes. This guarantees constant access time to the neighbors of the topological elements. In addition, an open-source implementation named Open Volumetric Mesh （OVM） of the pro-posed data structure is written in C＋＋ using generic programming concepts.展开更多
Since Kekule, chemists have regarded molecular structural diagratim as one of the most important means to describe compounds. With many years’ effort, the structure handling approaches based on the chromatic graph th...Since Kekule, chemists have regarded molecular structural diagratim as one of the most important means to describe compounds. With many years’ effort, the structure handling approaches based on the chromatic graph theory have been successfully applied to structure representation, specific structure canonicalisation, structure and substructure searching and structure registry. The specific structure handling systems at the level of database management system have been built up. However, the problem of generic structure handling, due to its inherent complexity, has not been completely resolved yet.展开更多
文摘This paper examines the generic structure of dissertation acknowledgements accompanying 168 M.A. and Ph.D. dissertations written by native speakers of Chinese in a variety of majors of two disciplines （humanity and social science） at Chinese universities. It attempts to find out the relationship between the variables, such as gender, seniority, publishing experience, the length and the generic structure of dissertation acknowledgements.
基金supported by the state "973" project "Research on Theories and Methods of Monitoring and Predicting of Heavy Rainfall in South China" (Grant No. 2004CB418300)
文摘An analysis was conducted on the evolutional process of a mesoscale convective vortex （MCV） and associated heavy rainfall in the Dabie Mountain area on 21-22 June 2008,as well as their structural characteristics in different stages,by using the mesoscale reanalysis data with 3 km and 1 h resolution generated by the Local Analysis and Prediction System （LAPS） in the Southern China Heavy Rainfall Experiment.The results showed that the latent heat released by convection in the midtroposphere was the main energy source for the development of a low-level vortex.There was a positive feedback interaction between the convection and the vortex,and the evolution of the MCV was closely related to the strength of the positive interaction.The most typical characteristics of the thermal structure in different stages were that,there was a relatively thin diabatic heating layer in the midtroposphere in the formative stage;the thickness of diabatic heating layer significantly increased in the mature stage;and it almost disappeared in the decay stage.The characteristics of the dynamic structure were that,in the formative stage,there was no anticyclonic circulation at the high level;in the mature stage,an anticyclonic circulation with strong divergence was formed at the high level;in the decay stage,the anticyclonic circulation was damaged and the high-level atmosphere was in a disordered state of turbulence.Finally,the structural schematics of the MCV in the formative and mature stage were established respectively.
基金Supported by Fundamental Research Funds for the Central Universities(Nos.2013ZM087,2012zz0062,2012zz0063)Doctoral Fund of Ministry of Education of China(No.20130172120010)
文摘This work introduces a scalable and efficient topological structure for tetrahedral and hexahedral meshes. The design of the data structure aims at maximal flexibility and high performance. It provides a high scalability by using hierarchical representa-tions of topological elements. The proposed data structure is array-based, and it is a compact representation of the half-edge data structure for volume elements and half-face data structure for volumetric meshes. This guarantees constant access time to the neighbors of the topological elements. In addition, an open-source implementation named Open Volumetric Mesh （OVM） of the pro-posed data structure is written in C＋＋ using generic programming concepts.
文摘Since Kekule, chemists have regarded molecular structural diagratim as one of the most important means to describe compounds. With many years’ effort, the structure handling approaches based on the chromatic graph theory have been successfully applied to structure representation, specific structure canonicalisation, structure and substructure searching and structure registry. The specific structure handling systems at the level of database management system have been built up. However, the problem of generic structure handling, due to its inherent complexity, has not been completely resolved yet.
