Vehicle management is a very important application area of GPS/GIS. Each customer has its special requirements on GIS system when he installs it. We discuss a common structure of our GPS/GIS implementation, and presen...Vehicle management is a very important application area of GPS/GIS. Each customer has its special requirements on GIS system when he installs it. We discuss a common structure of our GPS/GIS implementation, and present a case study on bulk concrete trucks management for bulk concrete producers. With GPS/GIS system, bulk concrete producers can improve their performance in scheduling and management.展开更多
This paper presents one of GPS Vehicle Monitor System on base of Web GIS technology,which is very important in vehicle tracking, scheduling and management. In the paper, a real GPS vehicle monitor system which using I...This paper presents one of GPS Vehicle Monitor System on base of Web GIS technology,which is very important in vehicle tracking, scheduling and management. In the paper, a real GPS vehicle monitor system which using Internet technology is introduced. This system have been putted into practice successfully.展开更多
Currently domestic researches on urban imago space concentrate in a few cities that lie in the advanced region, such as Beijing, Guangzhou, Wuhan, etc., but in so far as those cities that lie in the northwest inland r...Currently domestic researches on urban imago space concentrate in a few cities that lie in the advanced region, such as Beijing, Guangzhou, Wuhan, etc., but in so far as those cities that lie in the northwest inland region, the research of this aspect is still few. In order to supplement a special example to the urban imago space theory and to validate former theory, this article studied the Lanzhou urban imago space. During the course of researching, authors adopted some investigating methods, such as visiting on the spot, photograph identification method and sketch map identification method etc. Using investigated data, this paper made an elementary research on urban imago space of Lanzhou, which is a typical valley city in the western China. The result of study indicated that the urban imago space of Lanzhou takes Xiguan Cross as its center (Lanzhou involves four districts of Chengguan, Qilihe, Anning and Xigu). In the process of recognition of urban imago space, the Huanghe (Yellow) River and mountains beside the city are the dominant factors and the main nodes of cognition. So the urban imago space of Lanzhou is quite different from that of plain cities. Interviewee did well in the spatial structure map, which was made up of mountainous land, river and main trunk roads,the group structure took profound impression on people.展开更多
The geometries, bondings, and vibrational frequencies of C 2n H ( n =3-9) and C 2n -1 N( n =3-9) were investigated by means of density functional theory(DFT). The vertical excitation energies for th...The geometries, bondings, and vibrational frequencies of C 2n H ( n =3-9) and C 2n -1 N( n =3-9) were investigated by means of density functional theory(DFT). The vertical excitation energies for the X 2Π→ 2Π transitions of C 2n H( n =3-9) and for the X 2Σ→ 2Π and the X 2Π→ 2Π transitions of C 2n -1 N( n =3-9) have been calculated by the time-dependent density functional theory(TD-DFT) approach. On the basis of present calculations, the explicit expression for the wavelengths of the excitation energies in linear carbon chains is suggested, namely, λ 0=[1240 6A/(2+[KF(]3n+6-3n+3)](1-B e -Cn ), where A=3 24463, B=0 90742 , and C = 0 07862 for C 2n H, and A=2 94714, B=0 83929 , and C =0 08539 for C 2n -1 N. In consideration of a comparison of the theory with the experiment, both the expressions are modified as λ 1=0 92( λ 0+100) and λ 1= 0 95( λ 0+90) for C 2n H and C 2n -1 N, respectively. (1-B e -Cn ), where A=3 24463, B=0 90742 , and C = 0 07862 for C 2n H, and A=2 94714, B=0 83929 , and C =0 08539 for C 2n -1 N. In consideration of a comparison of the theory with the experiment, both the expressions are modified as λ 1=0 92( λ 0+100) and λ 1= 0 95( λ 0+90) for C 2n H and C 2n -1 N, respectively.展开更多
In this paper, the fundamentals of predicting karst-fractured zones using both seismic attribute technique and pattern recognition method are introduced. Ordovician limestone karst-fractured zones in the First Mining ...In this paper, the fundamentals of predicting karst-fractured zones using both seismic attribute technique and pattern recognition method are introduced. Ordovician limestone karst-fractured zones in the First Mining Area of Wutongzhuang Coal Mine were forecast by using practical seismic data. The result shows that both seismic attribute technique and pattern recognition method are effective in predicting karst-fractured zones.展开更多
基金This work is supported in part by Chongqing Science Fund # 774 2 - 4 China and by U niversity ITResearch Center ProjectKorea
文摘Vehicle management is a very important application area of GPS/GIS. Each customer has its special requirements on GIS system when he installs it. We discuss a common structure of our GPS/GIS implementation, and present a case study on bulk concrete trucks management for bulk concrete producers. With GPS/GIS system, bulk concrete producers can improve their performance in scheduling and management.
基金This work is supported by Chongqing Science and Technology Comm ittee(No.774 2 - 4 )
文摘This paper presents one of GPS Vehicle Monitor System on base of Web GIS technology,which is very important in vehicle tracking, scheduling and management. In the paper, a real GPS vehicle monitor system which using Internet technology is introduced. This system have been putted into practice successfully.
基金Under the auspices of the National Natural Science Foundation of China (No. 40201016) and the National Social Science Foundation of China (No.02BJL033)
文摘Currently domestic researches on urban imago space concentrate in a few cities that lie in the advanced region, such as Beijing, Guangzhou, Wuhan, etc., but in so far as those cities that lie in the northwest inland region, the research of this aspect is still few. In order to supplement a special example to the urban imago space theory and to validate former theory, this article studied the Lanzhou urban imago space. During the course of researching, authors adopted some investigating methods, such as visiting on the spot, photograph identification method and sketch map identification method etc. Using investigated data, this paper made an elementary research on urban imago space of Lanzhou, which is a typical valley city in the western China. The result of study indicated that the urban imago space of Lanzhou takes Xiguan Cross as its center (Lanzhou involves four districts of Chengguan, Qilihe, Anning and Xigu). In the process of recognition of urban imago space, the Huanghe (Yellow) River and mountains beside the city are the dominant factors and the main nodes of cognition. So the urban imago space of Lanzhou is quite different from that of plain cities. Interviewee did well in the spatial structure map, which was made up of mountainous land, river and main trunk roads,the group structure took profound impression on people.
基金Supported by the National Natural Science Foundation of China( Nos.2 0 1730 4 2 ,2 0 2 330 2 0 and2 0 0 2 10 0 2 ) and Trans-Century Training Programm e Foundation of the Educational Ministry of China
文摘The geometries, bondings, and vibrational frequencies of C 2n H ( n =3-9) and C 2n -1 N( n =3-9) were investigated by means of density functional theory(DFT). The vertical excitation energies for the X 2Π→ 2Π transitions of C 2n H( n =3-9) and for the X 2Σ→ 2Π and the X 2Π→ 2Π transitions of C 2n -1 N( n =3-9) have been calculated by the time-dependent density functional theory(TD-DFT) approach. On the basis of present calculations, the explicit expression for the wavelengths of the excitation energies in linear carbon chains is suggested, namely, λ 0=[1240 6A/(2+[KF(]3n+6-3n+3)](1-B e -Cn ), where A=3 24463, B=0 90742 , and C = 0 07862 for C 2n H, and A=2 94714, B=0 83929 , and C =0 08539 for C 2n -1 N. In consideration of a comparison of the theory with the experiment, both the expressions are modified as λ 1=0 92( λ 0+100) and λ 1= 0 95( λ 0+90) for C 2n H and C 2n -1 N, respectively. (1-B e -Cn ), where A=3 24463, B=0 90742 , and C = 0 07862 for C 2n H, and A=2 94714, B=0 83929 , and C =0 08539 for C 2n -1 N. In consideration of a comparison of the theory with the experiment, both the expressions are modified as λ 1=0 92( λ 0+100) and λ 1= 0 95( λ 0+90) for C 2n H and C 2n -1 N, respectively.
文摘In this paper, the fundamentals of predicting karst-fractured zones using both seismic attribute technique and pattern recognition method are introduced. Ordovician limestone karst-fractured zones in the First Mining Area of Wutongzhuang Coal Mine were forecast by using practical seismic data. The result shows that both seismic attribute technique and pattern recognition method are effective in predicting karst-fractured zones.
