Geographic information system(GIS)technology is a combination of computer’s graphic and database to store and process spatial information.According to the users’ demands,GIS exports the exact geographic information ...Geographic information system(GIS)technology is a combination of computer’s graphic and database to store and process spatial information.According to the users’ demands,GIS exports the exact geographic information and related in- formation for users with map and description through associating geographic place and related attributes.Based on the existing pop- ular technology,this paper presents a distributed web GIS application based on component technology and fractal image compres- sion.It presents the basic framework of the proposed system at first,and then discusses the key technology of implementing this sys- tem;finally it designs a three-layer WEB GIS instance using VC++ATL based on Geo Beans.The example suggests the proposed design is correct,feasible and valid.展开更多
The paper proposes an architectural model of web-based geographic information system based on mashup-technologies. Represented system is designed using the programming patterns and is used to control access rights to ...The paper proposes an architectural model of web-based geographic information system based on mashup-technologies. Represented system is designed using the programming patterns and is used to control access rights to various functions or objects in the system.展开更多
Web service is characterized by its isomerism and loose coupling;thus greatly facilitate the application of operation in distributed situation,but its disadvantages cause serious safety problems.The principium and cha...Web service is characterized by its isomerism and loose coupling;thus greatly facilitate the application of operation in distributed situation,but its disadvantages cause serious safety problems.The principium and characteristic of Web service classical attack technology are expatiated,classical attack techniques are classified,and attack technology is simulated,and then,the directions and the future of Web security are discussed.展开更多
BACKGROUND Duodenal web is a rare congenital malformation,exceedingly uncommon in adults,and often misdiagnosed due to the subtle imaging features.CASE SUMMARY By analyzing the clinical diagnosis process and various i...BACKGROUND Duodenal web is a rare congenital malformation,exceedingly uncommon in adults,and often misdiagnosed due to the subtle imaging features.CASE SUMMARY By analyzing the clinical diagnosis process and various imaging findings of a patient from our institution,this case report emphasizes the necessity of upper gastrointestinal series in diagnosing duodenal webs,outlines its typical radiographic features,and provides a literature review on the etiology,clinical presentation,and management of this condition.CONCLUSION This case report emphasizes the necessity of upper gastrointestinal series in diagnosing duodenal webs.展开更多
In the light of the defect of web vulnerability detection system, combined with the characteristics of high efficient and sharing in the cloud environment, a design proposal is presented based on cloud environment, wh...In the light of the defect of web vulnerability detection system, combined with the characteristics of high efficient and sharing in the cloud environment, a design proposal is presented based on cloud environment, which analyses the key technology of gaining the URL, task allocation and scheduling and the design of attack detection. Experiment shows its feasibility and effectiveness in this paper.展开更多
电网灾害风险预警主要采用数据特征边缘分析得出风险预警结果,忽略了理论差值对预警准确度的影响,导致预警频次一致性低。为此,提出一种基于Web地理信息系统(geographic information system,GIS)技术的电网灾害风险预警模型构建方法。基...电网灾害风险预警主要采用数据特征边缘分析得出风险预警结果,忽略了理论差值对预警准确度的影响,导致预警频次一致性低。为此,提出一种基于Web地理信息系统(geographic information system,GIS)技术的电网灾害风险预警模型构建方法。基于WebGIS技术建立风险预警指标体系,分析灾害点距离作为原始特征,构建电网灾害风险预警模型,计算理论差值损失值优化模型参数,迭代输出模型结果,结合电网设备可靠度,定义风险预警等级,实现电网灾害风险预警。实验结果表明,所提模型方法表现出的预警频次一致性较高,预警结果准确度较高,满足了电网运维与灾害防护工作的现实需求。展开更多
In order to solve the problem of modeling product configuration knowledge at the semantic level to successfully implement the mass customization strategy, an approach of ontology-based configuration knowledge modeling...In order to solve the problem of modeling product configuration knowledge at the semantic level to successfully implement the mass customization strategy, an approach of ontology-based configuration knowledge modeling, combining semantic web technologies, was proposed. A general configuration ontology was developed to provide a common concept structure for modeling configuration knowledge and rules of specific product domains. The OWL web ontology language and semantic web rule language （SWRL） were used to formally represent the configuration ontology, domain configuration knowledge and rules to enhance the consistency, maintainability and reusability of all the configuration knowledge. The configuration knowledge modeling of a customizable personal computer family shows that the approach can provide explicit, computerunderstandable knowledge semantics for specific product configuration domains and can efficiently support automatic configuration tasks of complex products.展开更多
文摘Geographic information system(GIS)technology is a combination of computer’s graphic and database to store and process spatial information.According to the users’ demands,GIS exports the exact geographic information and related in- formation for users with map and description through associating geographic place and related attributes.Based on the existing pop- ular technology,this paper presents a distributed web GIS application based on component technology and fractal image compres- sion.It presents the basic framework of the proposed system at first,and then discusses the key technology of implementing this sys- tem;finally it designs a three-layer WEB GIS instance using VC++ATL based on Geo Beans.The example suggests the proposed design is correct,feasible and valid.
文摘The paper proposes an architectural model of web-based geographic information system based on mashup-technologies. Represented system is designed using the programming patterns and is used to control access rights to various functions or objects in the system.
文摘Web service is characterized by its isomerism and loose coupling;thus greatly facilitate the application of operation in distributed situation,but its disadvantages cause serious safety problems.The principium and characteristic of Web service classical attack technology are expatiated,classical attack techniques are classified,and attack technology is simulated,and then,the directions and the future of Web security are discussed.
文摘BACKGROUND Duodenal web is a rare congenital malformation,exceedingly uncommon in adults,and often misdiagnosed due to the subtle imaging features.CASE SUMMARY By analyzing the clinical diagnosis process and various imaging findings of a patient from our institution,this case report emphasizes the necessity of upper gastrointestinal series in diagnosing duodenal webs,outlines its typical radiographic features,and provides a literature review on the etiology,clinical presentation,and management of this condition.CONCLUSION This case report emphasizes the necessity of upper gastrointestinal series in diagnosing duodenal webs.
文摘In the light of the defect of web vulnerability detection system, combined with the characteristics of high efficient and sharing in the cloud environment, a design proposal is presented based on cloud environment, which analyses the key technology of gaining the URL, task allocation and scheduling and the design of attack detection. Experiment shows its feasibility and effectiveness in this paper.
文摘电网灾害风险预警主要采用数据特征边缘分析得出风险预警结果,忽略了理论差值对预警准确度的影响,导致预警频次一致性低。为此,提出一种基于Web地理信息系统(geographic information system,GIS)技术的电网灾害风险预警模型构建方法。基于WebGIS技术建立风险预警指标体系,分析灾害点距离作为原始特征,构建电网灾害风险预警模型,计算理论差值损失值优化模型参数,迭代输出模型结果,结合电网设备可靠度,定义风险预警等级,实现电网灾害风险预警。实验结果表明,所提模型方法表现出的预警频次一致性较高,预警结果准确度较高,满足了电网运维与灾害防护工作的现实需求。
基金The National Natural Science Foundation of China(No.70471023).
文摘In order to solve the problem of modeling product configuration knowledge at the semantic level to successfully implement the mass customization strategy, an approach of ontology-based configuration knowledge modeling, combining semantic web technologies, was proposed. A general configuration ontology was developed to provide a common concept structure for modeling configuration knowledge and rules of specific product domains. The OWL web ontology language and semantic web rule language （SWRL） were used to formally represent the configuration ontology, domain configuration knowledge and rules to enhance the consistency, maintainability and reusability of all the configuration knowledge. The configuration knowledge modeling of a customizable personal computer family shows that the approach can provide explicit, computerunderstandable knowledge semantics for specific product configuration domains and can efficiently support automatic configuration tasks of complex products.
