Tourism spatial distribution has played an important role in local tourism development.The tourism function and development direction can be determined,as well as the complementary resources can be realized through in...Tourism spatial distribution has played an important role in local tourism development.The tourism function and development direction can be determined,as well as the complementary resources can be realized through investigating the status of tourism in the region,identifying the status of tourism development and division of the tourism spatial distribution.The Mongolian Autonomous Prefecture of Xinjiang Bortala has been selected as a study area.Status of tourism development,tourism spatial distribution and some problem in Bortala were summarized.Finally,countermeasures were put forward pertinently.展开更多
Real-time Human action classification in complex scenes has applications in various domains such as visual surveillance, video retrieval and human robot interaction. While, the task is challenging due to computation e...Real-time Human action classification in complex scenes has applications in various domains such as visual surveillance, video retrieval and human robot interaction. While, the task is challenging due to computation efficiency, cluttered backgrounds and intro-variability among same type of actions. Spatio-temporal interest point （STIP） based methods have shown promising results to tackle human action classification in complex scenes efficiently. However, the state-of-the-art works typically utilize bag-of-visual words （BoVW） model which only focuses on the word distribution of STIPs and ignore the distinctive character of word structure. In this paper, the distribution of STIPs is organized into a salient directed graph, which reflects salient motions and can be divided into a time salient directed graph and a space salient directed graph, aiming at adding spatio-temporal discriminant to BoVW. Generally speaking, both salient directed graphs are constructed by labeled STIPs in pairs. In detail, the ＂directional co-occurrence＂ property of different labeled pairwise STIPs in same frame is utilized to represent the time saliency, and the space saliency is reflected by the ＂geometric relationships＂ between same labeled pairwise STIPs across different frames. Then, new statistical features namely the Time Salient Pairwise feature （TSP） and the Space Salient Pairwise feature （SSP） are designed to describe two salient directed graphs, respectively. Experiments are carried out with a homogeneous kernel SVM classifier, on four challenging datasets KTH, ADL and UT-Interaction. Final results confirm the complementary of TSP and SSP, and our multi-cue representation TSP ＋ SSP ＋ BoVW can properly describe human actions with large intro-variability in real-time.展开更多
The disentanglement evolution of bipartite spin-1/2 system coupled to a common surrounding XY chain in transverse fields at nonzero temperature is studied in this letter. The dynamical process of the entanglement is n...The disentanglement evolution of bipartite spin-1/2 system coupled to a common surrounding XY chain in transverse fields at nonzero temperature is studied in this letter. The dynamical process of the entanglement is numerically and analytically investigated. We find that thermal effects can enhance disentanglement if the entangled initial state of the central spins does not in the decoherence free space. The critical phenomenon of quantum phase transitions reflected in the disentanglement can be washed out by the thermal effect eventually.展开更多
1 Introduction The overall plan of the Chinese Space Station （CSS） project focuses on the grand goal of building a space station with Chinese characteristics, and adheres to the following basic principles： conformi...1 Introduction The overall plan of the Chinese Space Station （CSS） project focuses on the grand goal of building a space station with Chinese characteristics, and adheres to the following basic principles： conforming to China＇s national conditions; building a station with modest scale and leaving room for extension; constructing a station with outstanding Chinese elements and core connotations; embodying the strategic goals of national development and driving innovation and development; pursuing technological advancement by employing modem advanced technologies to build and operate the CSS and mastering the construction and operation technology of large space facilities; focusing on the application efficiency for major innovation and technological achievements in the space application field; pursuing economical operations; and taking the road of sustainable development.展开更多
文摘Tourism spatial distribution has played an important role in local tourism development.The tourism function and development direction can be determined,as well as the complementary resources can be realized through investigating the status of tourism in the region,identifying the status of tourism development and division of the tourism spatial distribution.The Mongolian Autonomous Prefecture of Xinjiang Bortala has been selected as a study area.Status of tourism development,tourism spatial distribution and some problem in Bortala were summarized.Finally,countermeasures were put forward pertinently.
基金This work is supported by the National Natural Science Foundation of China （NSFC, nos. 61340046）, the National High Technology Research and Development Programme of China （863 Programme, no. 2006AA04Z247）, the Scientific and Technical Innovation Commission of Shenzhen Munici-pality （nos. JCYJ20130331144631730）, and the Specialized Research Fund for the Doctoral Programme of Higher Edu- cation （SRFDP, no. 20130001110011）.
文摘Real-time Human action classification in complex scenes has applications in various domains such as visual surveillance, video retrieval and human robot interaction. While, the task is challenging due to computation efficiency, cluttered backgrounds and intro-variability among same type of actions. Spatio-temporal interest point （STIP） based methods have shown promising results to tackle human action classification in complex scenes efficiently. However, the state-of-the-art works typically utilize bag-of-visual words （BoVW） model which only focuses on the word distribution of STIPs and ignore the distinctive character of word structure. In this paper, the distribution of STIPs is organized into a salient directed graph, which reflects salient motions and can be divided into a time salient directed graph and a space salient directed graph, aiming at adding spatio-temporal discriminant to BoVW. Generally speaking, both salient directed graphs are constructed by labeled STIPs in pairs. In detail, the ＂directional co-occurrence＂ property of different labeled pairwise STIPs in same frame is utilized to represent the time saliency, and the space saliency is reflected by the ＂geometric relationships＂ between same labeled pairwise STIPs across different frames. Then, new statistical features namely the Time Salient Pairwise feature （TSP） and the Space Salient Pairwise feature （SSP） are designed to describe two salient directed graphs, respectively. Experiments are carried out with a homogeneous kernel SVM classifier, on four challenging datasets KTH, ADL and UT-Interaction. Final results confirm the complementary of TSP and SSP, and our multi-cue representation TSP ＋ SSP ＋ BoVW can properly describe human actions with large intro-variability in real-time.
基金supported by National Natural Science Foundation of China under Grant Nos.60578014 and 10775023
文摘The disentanglement evolution of bipartite spin-1/2 system coupled to a common surrounding XY chain in transverse fields at nonzero temperature is studied in this letter. The dynamical process of the entanglement is numerically and analytically investigated. We find that thermal effects can enhance disentanglement if the entangled initial state of the central spins does not in the decoherence free space. The critical phenomenon of quantum phase transitions reflected in the disentanglement can be washed out by the thermal effect eventually.
文摘1 Introduction The overall plan of the Chinese Space Station （CSS） project focuses on the grand goal of building a space station with Chinese characteristics, and adheres to the following basic principles： conforming to China＇s national conditions; building a station with modest scale and leaving room for extension; constructing a station with outstanding Chinese elements and core connotations; embodying the strategic goals of national development and driving innovation and development; pursuing technological advancement by employing modem advanced technologies to build and operate the CSS and mastering the construction and operation technology of large space facilities; focusing on the application efficiency for major innovation and technological achievements in the space application field; pursuing economical operations; and taking the road of sustainable development.
