目的:探讨CAD/CAM个性化基台在缺牙种植修复中的美学效果。方法:选取2016年7月-2019年7月唐山市口腔医院收治的51例缺牙患者为研究对象,通过随机数字表法分为观察组(n=26)和对照组(n=25)。对照组采用成品基台进行种植修复,观察组采用CAD...目的:探讨CAD/CAM个性化基台在缺牙种植修复中的美学效果。方法:选取2016年7月-2019年7月唐山市口腔医院收治的51例缺牙患者为研究对象,通过随机数字表法分为观察组(n=26)和对照组(n=25)。对照组采用成品基台进行种植修复,观察组采用CAD/CAM个性化基台进行种植修复,两组均治疗3个月。比较两组治疗3个月后的龈乳头形态,对比两组治疗前、治疗3个月后的美学评分及牙周指标,统计两组治疗期间的食物嵌塞情况。结果:治疗3个月后,观察组牙龈乳头指数明显高于对照组(92.31% vs 68.00%),差异有统计学意义(P<0.05)。治疗3个月后,两组红色美学指数(PES)及白色美学指数(WES)评分较治疗前升高,观察组高于对照组,差异有统计学意义(P<0.05);而牙龈指数(GI)、牙齿菌斑指数(PLI)及龈沟出血指数(SBI)评分较治疗前降低,且观察组低于对照组,差异有统计学意义(P<0.05)。治疗期间,观察组食物嵌塞发生率低于对照组(11.54% vs 44.00%),差异有统计学意义(P<0.05)。结论:CAD/CAM个性化基台可改善缺牙患者龈乳头形态及牙周指标,提高美学效果,同时可减少患者食物嵌塞的发生。展开更多
To provide the right services or information to the right users, at the right time and in the right place in ubiquitous computing environment, an Indoor Ubiquitous Computing Environment based on Location-Awareness, IU...To provide the right services or information to the right users, at the right time and in the right place in ubiquitous computing environment, an Indoor Ubiquitous Computing Environment based on Location-Awareness, IUCELA, is presented in this paper. A general architecture of IUCELA is designed to connect multiple sensing devices with locationaware applications. Then the function of location-aware middleware which is the core componnet of the proposed architecture is elaborated. Finally an indoor forum is taken as an example scenario to demonstrate the security, usefulness, flexibiltity and robustness of IUCELA.展开更多
Cloud computing is very attractive for schools, research institutions and enterpri- ses which need reducing IT costs, improving computing platform sharing and meeting lice- nse constraints. Sharing, management and on-...Cloud computing is very attractive for schools, research institutions and enterpri- ses which need reducing IT costs, improving computing platform sharing and meeting lice- nse constraints. Sharing, management and on- demand allocation of network resources are particularly important in Cloud computing. Ho- wever, nearly all-current available cloud com- puting platforms are either proprietary or their software infrastructure is invisible to the rese- arch community except for a few open-source platforms. For universities and research insti- tutes, more open and testable experimental plat- forms are needed in a lab-level with PCs. In this paper, a platform of infrastructure resou- rce sharing system （Platform as a Service （PaaS）） is developed in virtual Cloud comput- hug environment. Its architecture, core modules, main functions, design and operational envir- onment and applications are introduced in de- tail. It has good expandability and can impr- ove resource sharing and utilization and is app- lied to regular computer science teaching and research process.展开更多
This paper deals with the computer modeling of structures starting from a point cloud. The CCTV （China Central Television） tower headquarters is the case for study because the shape of this building is non-stellar, ...This paper deals with the computer modeling of structures starting from a point cloud. The CCTV （China Central Television） tower headquarters is the case for study because the shape of this building is non-stellar, concave and multi-connected. It is composed of sowns and chains. The sown is the representation of a horizontal plane formed by dense points. The chain is a planar path modeled by rare points. The CCTV structure is defined only by the three orthogonal Cartesian coordinates of the points. The proposed computer modeling uses a sequence of procedures and the desired outputted 3D model is consistent. The first procedure is devoted to attributing points to their voxel and to estimating three values needed afterwards. The second procedure is devoted to analyzing clusters vertically and horizontally, to preliminarily distinguishing chains from sowns and to generating relational matching. The third procedure is devoted to building closed paths between all chains and all their projections on sowns. The fourth procedure is devoted to connecting points with triangles. The fifth procedure, still being implemented, is devoted to interpolating triangles with triangular splines. The results show it is possible to achieve the 3D model using the above mentioned procedures. These procedures are written, implemented and tested and they form a library of people＇s own software. The code is written using Matlab. It is not possible to obtain the required 3D model if the procedures are applied in the wrong order or one step is skipped. To conclude, it is possible to obtain the computer model of the CCTV using the provided sequence of procedures.展开更多
It is still a laborious work to consult massive multidisciplinary geological maps which are scattered in different geological departments,and hard to give full play to the potential application value of geological map...It is still a laborious work to consult massive multidisciplinary geological maps which are scattered in different geological departments,and hard to give full play to the potential application value of geological map. Along with the network,the development of communication and computer technology,especially with the Web2.0 technology arisen,provides opportunities to the web for sharing of geological maps. Web fast sharing platform of massive geological maps( WSPGM) is based on the Flex technology development,using B/S architecture,with map navigation,search,display,security and other functions of the software system. Through the map pretreatment and asynchronous communication the system can display any size of geological map,and through the range limits,rights management,sharing system and watermark logo to take effective security on geological map. On the basis of this system,with the Jilin University web sharing system of geological map,the system can greatly improve the efficiency of using geological map. for research.展开更多
Article use Visual LISP development tools and DCL dialog technology, which implements the standard straight teeth, a two- dimensional cylindrical gear paranaetric drawing on AutoCAD platform, with easy to operate and ...Article use Visual LISP development tools and DCL dialog technology, which implements the standard straight teeth, a two- dimensional cylindrical gear paranaetric drawing on AutoCAD platform, with easy to operate and improve design efficiency. We achieved that using the dialog box design input parameters, and gear parts of the design calculations, parameters proofreading and all kinds of gear design drawing different structures by programming. The output is fully automated computer-aided design system. The results show that the design of the system significantly improves the efficiency of the part design.展开更多
Currently, under the cloud service architecture, the increasing importance of network security and security issues are still emerging. With the rapid development of the network platform, it is connected to the number ...Currently, under the cloud service architecture, the increasing importance of network security and security issues are still emerging. With the rapid development of the network platform, it is connected to the number and size of the trusted computing environment for all kinds of applications that are rapidly expanding, ever-changing network health, network time being emergencies, assault, failure, threat of disaster, its safety, survivability and availability of face serious challenges. Although TNC Working Group made safe and reliable framework from the network access layer, it is not at the level of user access, system access levels and further given the level of situational awareness and effective solutions.展开更多
Because of the rapid development of computer, new term about IT is emerging. Such new IT mostly comes from foreign countries and the technical manuals about how to learn such new IT and how to use its latest developme...Because of the rapid development of computer, new term about IT is emerging. Such new IT mostly comes from foreign countries and the technical manuals about how to learn such new IT and how to use its latest development tools in English. In this paper, combined with previous teaching experience and the development of a large number of networked multimedia, a preliminary study carried out on the interactive network multimedia education platform design patterns, the overall structure and system solutions. As the study is only a tentative teaching experiment based on the collaborative teaching mode, necessary improvement and modification are needed in other teaching practice. According to the curriculum characteristics and teaching situation of computer professional English, propose some teaching innovation scheme in terms of teaching contents and teaching methods, and combine computer professional English with computer professional courses to strengthen student application ability and improve teaching quality effectively.展开更多
文摘目的:探讨CAD/CAM个性化基台在缺牙种植修复中的美学效果。方法:选取2016年7月-2019年7月唐山市口腔医院收治的51例缺牙患者为研究对象,通过随机数字表法分为观察组(n=26)和对照组(n=25)。对照组采用成品基台进行种植修复,观察组采用CAD/CAM个性化基台进行种植修复,两组均治疗3个月。比较两组治疗3个月后的龈乳头形态,对比两组治疗前、治疗3个月后的美学评分及牙周指标,统计两组治疗期间的食物嵌塞情况。结果:治疗3个月后,观察组牙龈乳头指数明显高于对照组(92.31% vs 68.00%),差异有统计学意义(P<0.05)。治疗3个月后,两组红色美学指数(PES)及白色美学指数(WES)评分较治疗前升高,观察组高于对照组,差异有统计学意义(P<0.05);而牙龈指数(GI)、牙齿菌斑指数(PLI)及龈沟出血指数(SBI)评分较治疗前降低,且观察组低于对照组,差异有统计学意义(P<0.05)。治疗期间,观察组食物嵌塞发生率低于对照组(11.54% vs 44.00%),差异有统计学意义(P<0.05)。结论:CAD/CAM个性化基台可改善缺牙患者龈乳头形态及牙周指标,提高美学效果,同时可减少患者食物嵌塞的发生。
基金Supported by the Ministry of Educationin China (No.104086)
文摘To provide the right services or information to the right users, at the right time and in the right place in ubiquitous computing environment, an Indoor Ubiquitous Computing Environment based on Location-Awareness, IUCELA, is presented in this paper. A general architecture of IUCELA is designed to connect multiple sensing devices with locationaware applications. Then the function of location-aware middleware which is the core componnet of the proposed architecture is elaborated. Finally an indoor forum is taken as an example scenario to demonstrate the security, usefulness, flexibiltity and robustness of IUCELA.
基金supported by the Coalition for National Science Fundingunder Grant No.61150110486the Central University Funding under Grant No.ZYGX2013J073
文摘Cloud computing is very attractive for schools, research institutions and enterpri- ses which need reducing IT costs, improving computing platform sharing and meeting lice- nse constraints. Sharing, management and on- demand allocation of network resources are particularly important in Cloud computing. Ho- wever, nearly all-current available cloud com- puting platforms are either proprietary or their software infrastructure is invisible to the rese- arch community except for a few open-source platforms. For universities and research insti- tutes, more open and testable experimental plat- forms are needed in a lab-level with PCs. In this paper, a platform of infrastructure resou- rce sharing system （Platform as a Service （PaaS）） is developed in virtual Cloud comput- hug environment. Its architecture, core modules, main functions, design and operational envir- onment and applications are introduced in de- tail. It has good expandability and can impr- ove resource sharing and utilization and is app- lied to regular computer science teaching and research process.
文摘This paper deals with the computer modeling of structures starting from a point cloud. The CCTV （China Central Television） tower headquarters is the case for study because the shape of this building is non-stellar, concave and multi-connected. It is composed of sowns and chains. The sown is the representation of a horizontal plane formed by dense points. The chain is a planar path modeled by rare points. The CCTV structure is defined only by the three orthogonal Cartesian coordinates of the points. The proposed computer modeling uses a sequence of procedures and the desired outputted 3D model is consistent. The first procedure is devoted to attributing points to their voxel and to estimating three values needed afterwards. The second procedure is devoted to analyzing clusters vertically and horizontally, to preliminarily distinguishing chains from sowns and to generating relational matching. The third procedure is devoted to building closed paths between all chains and all their projections on sowns. The fourth procedure is devoted to connecting points with triangles. The fifth procedure, still being implemented, is devoted to interpolating triangles with triangular splines. The results show it is possible to achieve the 3D model using the above mentioned procedures. These procedures are written, implemented and tested and they form a library of people＇s own software. The code is written using Matlab. It is not possible to obtain the required 3D model if the procedures are applied in the wrong order or one step is skipped. To conclude, it is possible to obtain the computer model of the CCTV using the provided sequence of procedures.
文摘It is still a laborious work to consult massive multidisciplinary geological maps which are scattered in different geological departments,and hard to give full play to the potential application value of geological map. Along with the network,the development of communication and computer technology,especially with the Web2.0 technology arisen,provides opportunities to the web for sharing of geological maps. Web fast sharing platform of massive geological maps( WSPGM) is based on the Flex technology development,using B/S architecture,with map navigation,search,display,security and other functions of the software system. Through the map pretreatment and asynchronous communication the system can display any size of geological map,and through the range limits,rights management,sharing system and watermark logo to take effective security on geological map. On the basis of this system,with the Jilin University web sharing system of geological map,the system can greatly improve the efficiency of using geological map. for research.
文摘Article use Visual LISP development tools and DCL dialog technology, which implements the standard straight teeth, a two- dimensional cylindrical gear paranaetric drawing on AutoCAD platform, with easy to operate and improve design efficiency. We achieved that using the dialog box design input parameters, and gear parts of the design calculations, parameters proofreading and all kinds of gear design drawing different structures by programming. The output is fully automated computer-aided design system. The results show that the design of the system significantly improves the efficiency of the part design.
文摘Currently, under the cloud service architecture, the increasing importance of network security and security issues are still emerging. With the rapid development of the network platform, it is connected to the number and size of the trusted computing environment for all kinds of applications that are rapidly expanding, ever-changing network health, network time being emergencies, assault, failure, threat of disaster, its safety, survivability and availability of face serious challenges. Although TNC Working Group made safe and reliable framework from the network access layer, it is not at the level of user access, system access levels and further given the level of situational awareness and effective solutions.
文摘Because of the rapid development of computer, new term about IT is emerging. Such new IT mostly comes from foreign countries and the technical manuals about how to learn such new IT and how to use its latest development tools in English. In this paper, combined with previous teaching experience and the development of a large number of networked multimedia, a preliminary study carried out on the interactive network multimedia education platform design patterns, the overall structure and system solutions. As the study is only a tentative teaching experiment based on the collaborative teaching mode, necessary improvement and modification are needed in other teaching practice. According to the curriculum characteristics and teaching situation of computer professional English, propose some teaching innovation scheme in terms of teaching contents and teaching methods, and combine computer professional English with computer professional courses to strengthen student application ability and improve teaching quality effectively.
