检索结果-南通市图书馆

1-planar Graphs without 4-cycles or 5-cycles are 5-colorable

在线全文

学校读者我要写书评

暂无评论

Acta Mathematicae Applicatae Sinica 2022年第1期38卷 169-177页

作者： Li-li SONG Lei SUN Department of Mathematics and Statistics Shandong Normal UniversityJinan 250358China

A graph is 1-planar if it can be drawn on the Euclidean plane so that each edge is crossed by at most one other edge.A proper vertex k-coloring of a graph G is defined as a vertex coloring from a set of k colors such that no two adjacent vertices have the same color.A graph that can be assigned a proper k-coloring is k-colorable.A cycle is a path of edges and vertices wherein a vertex is reachable from itself.A cycle contains k vertices and k edges is a k-cycle.In this paper,it is proved that 1-planar graphs without 4-cycles or 5-cycles are 5-colorable.

关键词： 1-planar colorable discharging vertices faces

SAFETY PROBLEMS IN FULLY-MECHANIZED TOP-COAL CAVING LONGWALL faces

在线全文

学校读者我要写书评

暂无评论

Journal of China University of Mining and Technology 1994年第2期4卷 20-25页

作者：吴健郭文章

The thick-san top-ctal catrig technology has been in use in China for over a decade,and has given rise to siguscant economic efficiendes. Eftorts in reeent years to extend its applica tion to more complex mining conditions, mostly high-gas seams , with or without proneness ofspontaneous combustion. have brought about new safety problems This paper will highlight thefcatures and problems retared with thick-seam top-coal caving systems, compared with conventionai, fully-mecbanized longwall systems , particularly issues retated to methane, spontaneous combustion and dust,and disam the methods and measures to ded with them.

关键词： faces TOP SAFETY

在线全文

学校读者我要写书评

暂无评论

Mending faces

语言教育 1997年第5期 38-39页

作者： L.J.Ludovici 张怀森

The first World War caused a great advance in plastic surgery.that is,the surgery which improves the appearance.The New Zealand doctor,HaroldDell Gillies (born 1882),was one of the great plastic surgeons.This passage ... 详细信息

关键词： appearance Zealand doctor passage looking advance Mending faces nothing publishing numerous

Comparison of perceived pain and patients’ satisfaction with traditional local anesthesia and single tooth anesthesia: A randomized clinical trial

在线全文

学校读者我要写书评

暂无评论

World Journal of Clinical Cases 2019年第19期7卷 2986-2994页

作者： Mohammad I Al-Obaida Mehdiya Haider Rawan Hashim Wafa AlGheriri Sree Lalita Celur Samar A Al-Saleh Ebtissam M Al-Madi Department of Restorative Dental Sciences College of DentistryKing Saud UniversityRiyadh 11527Saudi Arabia College of Dentistry Princess Nourah bint AbdulRahman UniversityRiyadh 11671Saudi Arabia Department of Basic Dental Sciences College of DentistryPrincess Nourah bint AbdulRahman UniversityRiyadh13414Saudi Arabia Department of Prosthetic Dental Sciences College of DentistryKing Saud UniversityRiyadh 11527Saudi Arabia

BACKGROUND Contemporary innovations in the area of local anesthesia have attempted to provide an absolutely pain free experience for patients.Since the introduction of Computer-Controlled Local Anesthetic Delivery Systems to dentistry,many studies have compared its efficacy and safety to conventional anesthesia.However,very few studies have compared single tooth anesthesia(STA)and traditional local anesthesia.AIM To compare pain rating,changes in blood pressure,and heart rate during the local anesthetic injection.The secondary objectives were to measure the patients’level of satisfaction and the differences in anesthetic efficiency between the STA system and traditional local infiltration.METHODS A randomized controlled trial was conducted and a total of 80 patients with dental restorative needs were enrolled for the study.The patients were evaluated for their general physical status and oral clinical findings before enrollment.Information regarding perceived pain,changes in heart rate and blood pressure,and patients’satisfaction was collected using an electronic data form and was analyzed using paired and unpaired t-tests.RESULTS No significant difference was noted in perceived pain(P=0.59)and systolic blood pressure(P=0.09)during anesthetic injection using both traditional and STA techniques.STA patients had a significantly higher heart rate during anesthesia,although a statistically significant difference was noted among the traditional anesthesia and the STA groups even before anesthesia.During the restorative procedure,less pain was perceived by STA patients on the Wong-Baker faces pain scale,which was statistically significant(P<0.001).Analyses of post-procedure patient responses showed that STA patients had a significantly better treatment experience and preferred to have the same method of injection in the future(P=0.04).CONCLUSION STA system can provide less painful and more comfortable restorative treatment procedures in comparison to the traditional infiltration technique.

关键词： Local anesthesia Single tooth anesthesia Pain experience Patient satisfaction Pulse rate Heart beat Wong-Baker faces pain scale

APPLICATION RESEARCH OF COMBINATION PRINCIPLE IN CAD FEATURE RECOGNIZATION

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Mechanical Engineering 2005年第2期18卷 204-207页

作者： LiGuangrong GongGuangrong DingWuxue CollegeofMechanicalEngineering NanjingUniversityofScienceandTechnologyNanjing210092China

The method of extracting the basic features of part from the file of STEPAP214 of 3-D model is proposed. All faces in the file are the minimal elements. The combination isdone for the faces with geometry restrictions and some attributes by the theory of the bestalphabetic tree which is constructed by HU--TUCKER algorithm in combination principle. So the basicfeatures could be attained. This provides the research basis to the more share and integration ofCAD information in the virtual enterprises. Finally, a case is used to illustrate the validity ofthe approach.

关键词： Virtual enterprise Combination optimization faces Features Attribute

Typomorphism of the {211}-type zircon

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 2002年第2期47卷 154-158页

作者： WANG Xiang LI Wuxian Department of Earth Sciences and State Key Laboratory for Mineral Deposit Research Nanjing UniversityNanjing 210093China

A natural {211}-type zircon has been first dis-covered in the Pingtan gabbro in the Fujian Province, which is a new type of morphology reported in magmatic zircons. Investigation of morphology and trace-element chemistry shows two distinct growth stages, Stage 1 and Stage 2. The {211}-type zircon is the earliest crystallized phase of Stage 1 zircon. The low Hf contents and extreme depletion in U, Th and Y indicate that Stage 1 zircon was approximately in equilibration with melt during the crystallization, so that they are regarded as crystallized phase in deeper magmatic chamber. The Zr-saturated gabbroic magma is demonstrated to be derived from mantle magmas by differentiation. The magma differentiation and zircon crystallization at the lower crust level indicate the existence of underplating of mantle magma beneath this area, which results in strong magmatic activities in the late Mesozoic.

关键词： zircon {211} faces trace elements equilibrium crystallization.

Java Server faces进阶流程控制与JSF内置显示套件入门(下)

在线全文

学校读者我要写书评

暂无评论

程序员 2004年第1期 77-82页

作者：王森

继续上期内容，展示JSF中用于显示的组件标签以及相应的事件机制，包括Action、ValueCharged等等。

关键词： Java Server faces JSF 事件机制网页应用程序

JavaServer faces程序设计——JavaServer faces基本架构与基本程序设计(一)

在线全文

学校读者我要写书评

暂无评论

程序员 2003年第9期 82-85页

作者：王森

前言 JavaServer faces(往后简称JSF)是一套架构于JSP上头的应用程序框架(Framework)。相较于目前比较热门的Struts或Tapestry,JSF是一套把重点放在Web用户界面(Web UI)上头的应用程序框架。也就是说,当开发JSF网页时,开发者站在比一般... 详细信息

前言 JavaServer faces(往后简称JSF)是一套架构于JSP上头的应用程序框架(Framework)。相较于目前比较热门的Struts或Tapestry,JSF是一套把重点放在Web用户界面(Web UI)上头的应用程序框架。也就是说,当开发JSF网页时,开发者站在比一般JSP网页开发者更高的地方来分析、设计、与开发Web应用程序。所以JSF在开发上较JSP容易,维护性也较高。

关键词： JavaServer faces 程序设计应用程序网页数据模型

基于JavaServer^(TM) faces和DAO模式的大型设备采购系统

在线全文

学校读者我要写书评

暂无评论

计算机与信息技术 2007年第6期 1-3,6页

作者：张光墨四川大学计算机学院四川成都610065

文章先介绍了JavaTM EE家族中的重要成员——JavaServerTM faces这一技术。它位于JavaTM EE的Web层面,为Web程序员提供了基于组件和事件驱动的编程方式,这将改变传统的Web程序编写方式。然后,本文分析了大型设备采购系统的固有特性,并... 详细信息

文章先介绍了JavaTM EE家族中的重要成员——JavaServerTM faces这一技术。它位于JavaTM EE的Web层面,为Web程序员提供了基于组件和事件驱动的编程方式,这将改变传统的Web程序编写方式。然后,本文分析了大型设备采购系统的固有特性,并介绍了如何结合JSF技术和DAO模式开发大型设备的采购系统。

关键词： JavaServerTM faces JSF 大型设备采购信息系统