微生物天然产物数据库(m icrob ia l natura l products database,M NPD)是由中国医学科学院医药生物技术研究所和创腾科技有限公司联合开发,在M DL IS IS B ase化学信息管理系统上构建的综合性天然产物数据库。包括15000多个微生物天...微生物天然产物数据库(m icrob ia l natura l products database,M NPD)是由中国医学科学院医药生物技术研究所和创腾科技有限公司联合开发,在M DL IS IS B ase化学信息管理系统上构建的综合性天然产物数据库。包括15000多个微生物天然产物的来源、制备、理化性质、二维和三维化学结构、生物活性和原始文献等信息资料,可用于微生物天然产物的信息查询、总结性检索和计算机辅助药物分子设计研究。微生物天然产物数据库是医药领域科研工作者开展药物研发及相关工作的重要工具。本文简要介绍了数据库的开发历程、组成、功能及一些应用实例。展开更多
A mathematical model of obstacle limit surfaces for military airfield obstacle free space is established through airfield obstacle free space analysis.Based on the model,triangle mesh elevation model of military airfi...A mathematical model of obstacle limit surfaces for military airfield obstacle free space is established through airfield obstacle free space analysis.Based on the model,triangle mesh elevation model of military airfield obstacle free space is built by using the software-ArcGIS,and the 3-D display result is obtained.It is convenient to evaluate military airfield obstacle for superimposing digital elevation model（DEM）with military airfield topographic map.Thus it improves the efficiency greatly.It lays the foundation for the application of geographic information systems（GIS）in the management of military airfield obstacle free space.展开更多
The paper addresses the controversial question of the role of clay-sized dust in the formation of paleosols in coastal eolianites, Israel. At the Habonim type section, the pedocomplex dated by archaeology and luminesc...The paper addresses the controversial question of the role of clay-sized dust in the formation of paleosols in coastal eolianites, Israel. At the Habonim type section, the pedocomplex dated by archaeology and luminescence to 45-135 ka ago shows at least three paleosols, not separated by non-soil sediments. The oldest reddish paleosol （apparently related to MIS 5） is magnetically enhanced, leached from carbonates, with signs of bioturbation and strongly aged clay coatings. The reddening is due to very fine, -20 nm, poorly crystallized, superparamagnetic （SP） hematite, as determined by Mossbauer studies. In subsoil, lithorelics of eolianite are found. Over time, the soil surface aggraded due to accelerated fine dust accumulation alongside local slope wash. On younger materials formed magnetically depleted vertisols, dominated by smectite-type expandable paramagnetic clays. In thin sections, vertisols exhibit strong stipple-speckled and striated b-fabric due to shrink-swell processes, impregnative calcite nodules and Fe-Mn redistribution. The uppermost hydric vertisol shows the strongest expression of juxtaposed features of recurrent calcite and Fe precipitation. This paleosol developed on colluvial soil materials, as evidenced by mixing of clay coated and uncoated grains of quartz and calcite allochems. M6ssbauer spectra show high amounts of Fe（III） incorporated in the clay structure, low amounts of SP goethite and absence of SP hematite. Whilst magnetic susceptibility drops in vertisols to minimal values, increase. The latter along ferrimagnetie grain sizes with differences in the hierarchy of microfabric features is taken as indication for lithologic discontinuities which may have resulted from continuous, albeit variable and low-intensity, input of eolian clay from both remote Saharan and local sources, roughly dated to the earlier to middle part of the Last Glacial.展开更多
In this paper, the physical education information teaching design system is researched and developed based on VB6.0 optimization platform. According to the national physical education and health course standards and t...In this paper, the physical education information teaching design system is researched and developed based on VB6.0 optimization platform. According to the national physical education and health course standards and the fundamental theories of the constructivisrn, the author adopts the modular-design development method to design two functional areas which are the displaying of the teaching design contents and the online information database （nine modules in total） on the basis of the P.E. teaching design flow. Importantly, this system features the compatibility, scalability and practical applicability, and can effectively improve the ability of P.E. teachers to design their teaching, and hence provides a guarantee for the improvement of teaching quality and efficiency.展开更多
With the acceleration of the process of social information, information resources construction has become an important part of national development strategies. The library is one of the main information resources cons...With the acceleration of the process of social information, information resources construction has become an important part of national development strategies. The library is one of the main information resources constructions and is an important information resource position of social construction. Computer applications in the book management, greatly improve the management efficiency of the library, and have changed the traditional management service model. Universal service network extends to every comer make reader can read everywhere, breaking the boundaries of time and space and also greatly promoting the modernization of the library. Library modernization, according to the characteristics of the objective law refers library work practices, uses modem technological conditions, rational organization of scientific management of library work, to maximize efficiency and quality and effectively complete the task library. Library essence of modem management techniques is to achieve the modernization of libraries and library management modernization. Modem library information system can be divided into three aspects of building automation libraries, library networks and digital libraries. Digital library management directly reflects a country＇ s level of a regional knowledge economy and information industry development, and digital network resource management in the book gradually dominates.展开更多
In accordance with the organizational development process and management of party members, in this article it is based on the C/S and B/S mixed structure to finish the application design of client and servers, and usi...In accordance with the organizational development process and management of party members, in this article it is based on the C/S and B/S mixed structure to finish the application design of client and servers, and using the language of VB.NET develop with Inner Mongolia Agricultural University, members of University College Digital Management Information System. The system from research projects of Agriculture University Occupation Technical College of Inner Mongolia.展开更多
Soil organic matter (SOM) content is one of the main factors to be considered in the evaluation of soil health and fertility. As timing, human and monetary resources often limit the amount of available data, geostatis...Soil organic matter (SOM) content is one of the main factors to be considered in the evaluation of soil health and fertility. As timing, human and monetary resources often limit the amount of available data, geostatistical techniques provide a valid scientific approach to cope with spatial variability, to interpolate existing data and to predict values at unsampled locations for accurate SOM status survey. Using geostatistical and geographic information system (GIS) approaches, the spatial variability of some physical and chemical soil parameters was investigated under Mediterranean climatic condition in the Abruzzo region of central Italy, where soil erosion processes accelerated by human induced factors are the main causes of soil degradation associated with low SOM content. Experimental semivariograms were established to determine the spatial dependence of the soil variables under investigation. The results of 250 soil sampling point data were interpolated by means of ordinary kriging coupled with a GIS to produce contour maps distribution of soil texture, SOM content related to texture, and C/N ratio. The resulting spatial interpolation of the dataset highlighted a low content of SOM in relation with soil texture in most of the surveyed area (87%) and an optimal C/N ratio for only half of the investigated surface area. Spatial location of degraded area and the assessment of its magnitude can provide decision makers with an accurate support to design appropriate soil conservation strategies and then facilitate a regional planning of agri-environmental measures in the framework of the European Common Agricultural Policy.展开更多
文摘微生物天然产物数据库(m icrob ia l natura l products database,M NPD)是由中国医学科学院医药生物技术研究所和创腾科技有限公司联合开发,在M DL IS IS B ase化学信息管理系统上构建的综合性天然产物数据库。包括15000多个微生物天然产物的来源、制备、理化性质、二维和三维化学结构、生物活性和原始文献等信息资料,可用于微生物天然产物的信息查询、总结性检索和计算机辅助药物分子设计研究。微生物天然产物数据库是医药领域科研工作者开展药物研发及相关工作的重要工具。本文简要介绍了数据库的开发历程、组成、功能及一些应用实例。
基金Supported by the Science Research Foundation of Air Force Logistics Department(KJYZ09019)~~
文摘A mathematical model of obstacle limit surfaces for military airfield obstacle free space is established through airfield obstacle free space analysis.Based on the model,triangle mesh elevation model of military airfield obstacle free space is built by using the software-ArcGIS,and the 3-D display result is obtained.It is convenient to evaluate military airfield obstacle for superimposing digital elevation model（DEM）with military airfield topographic map.Thus it improves the efficiency greatly.It lays the foundation for the application of geographic information systems（GIS）in the management of military airfield obstacle free space.
基金supported by the Research Authority of the University of Haifa, and the Joint Foundation between Technion and University of Haifa
文摘The paper addresses the controversial question of the role of clay-sized dust in the formation of paleosols in coastal eolianites, Israel. At the Habonim type section, the pedocomplex dated by archaeology and luminescence to 45-135 ka ago shows at least three paleosols, not separated by non-soil sediments. The oldest reddish paleosol （apparently related to MIS 5） is magnetically enhanced, leached from carbonates, with signs of bioturbation and strongly aged clay coatings. The reddening is due to very fine, -20 nm, poorly crystallized, superparamagnetic （SP） hematite, as determined by Mossbauer studies. In subsoil, lithorelics of eolianite are found. Over time, the soil surface aggraded due to accelerated fine dust accumulation alongside local slope wash. On younger materials formed magnetically depleted vertisols, dominated by smectite-type expandable paramagnetic clays. In thin sections, vertisols exhibit strong stipple-speckled and striated b-fabric due to shrink-swell processes, impregnative calcite nodules and Fe-Mn redistribution. The uppermost hydric vertisol shows the strongest expression of juxtaposed features of recurrent calcite and Fe precipitation. This paleosol developed on colluvial soil materials, as evidenced by mixing of clay coated and uncoated grains of quartz and calcite allochems. M6ssbauer spectra show high amounts of Fe（III） incorporated in the clay structure, low amounts of SP goethite and absence of SP hematite. Whilst magnetic susceptibility drops in vertisols to minimal values, increase. The latter along ferrimagnetie grain sizes with differences in the hierarchy of microfabric features is taken as indication for lithologic discontinuities which may have resulted from continuous, albeit variable and low-intensity, input of eolian clay from both remote Saharan and local sources, roughly dated to the earlier to middle part of the Last Glacial.
文摘In this paper, the physical education information teaching design system is researched and developed based on VB6.0 optimization platform. According to the national physical education and health course standards and the fundamental theories of the constructivisrn, the author adopts the modular-design development method to design two functional areas which are the displaying of the teaching design contents and the online information database （nine modules in total） on the basis of the P.E. teaching design flow. Importantly, this system features the compatibility, scalability and practical applicability, and can effectively improve the ability of P.E. teachers to design their teaching, and hence provides a guarantee for the improvement of teaching quality and efficiency.
文摘With the acceleration of the process of social information, information resources construction has become an important part of national development strategies. The library is one of the main information resources constructions and is an important information resource position of social construction. Computer applications in the book management, greatly improve the management efficiency of the library, and have changed the traditional management service model. Universal service network extends to every comer make reader can read everywhere, breaking the boundaries of time and space and also greatly promoting the modernization of the library. Library modernization, according to the characteristics of the objective law refers library work practices, uses modem technological conditions, rational organization of scientific management of library work, to maximize efficiency and quality and effectively complete the task library. Library essence of modem management techniques is to achieve the modernization of libraries and library management modernization. Modem library information system can be divided into three aspects of building automation libraries, library networks and digital libraries. Digital library management directly reflects a country＇ s level of a regional knowledge economy and information industry development, and digital network resource management in the book gradually dominates.
文摘In accordance with the organizational development process and management of party members, in this article it is based on the C/S and B/S mixed structure to finish the application design of client and servers, and using the language of VB.NET develop with Inner Mongolia Agricultural University, members of University College Digital Management Information System. The system from research projects of Agriculture University Occupation Technical College of Inner Mongolia.
基金Supported by the Italian Ministry of Agricultural, Food and Forestry Policies (No. DM 19366)
文摘Soil organic matter (SOM) content is one of the main factors to be considered in the evaluation of soil health and fertility. As timing, human and monetary resources often limit the amount of available data, geostatistical techniques provide a valid scientific approach to cope with spatial variability, to interpolate existing data and to predict values at unsampled locations for accurate SOM status survey. Using geostatistical and geographic information system (GIS) approaches, the spatial variability of some physical and chemical soil parameters was investigated under Mediterranean climatic condition in the Abruzzo region of central Italy, where soil erosion processes accelerated by human induced factors are the main causes of soil degradation associated with low SOM content. Experimental semivariograms were established to determine the spatial dependence of the soil variables under investigation. The results of 250 soil sampling point data were interpolated by means of ordinary kriging coupled with a GIS to produce contour maps distribution of soil texture, SOM content related to texture, and C/N ratio. The resulting spatial interpolation of the dataset highlighted a low content of SOM in relation with soil texture in most of the surveyed area (87%) and an optimal C/N ratio for only half of the investigated surface area. Spatial location of degraded area and the assessment of its magnitude can provide decision makers with an accurate support to design appropriate soil conservation strategies and then facilitate a regional planning of agri-environmental measures in the framework of the European Common Agricultural Policy.
