oalib
Search Results: 1 - 10 of 100 matches for " "
All listed articles are free for downloading (OA Articles)
Page 1 /100
Display every page Item
云纹干涉法应用于金瓷界面抗断裂能力研究的初步探讨  [PDF]
朱梓园,张保卫,张修银,王冬梅,方如华,徐侃
华西口腔医学杂志 , 2004,
Abstract: 目的探讨云纹干涉法在金瓷界面抗断裂能力研究中的应用。方法在5组金瓷厚度不同的试件表面制作光栅,加载后采集u场及。场云纹干涉条纹,推算各组金瓷界面断裂韧性Jc值并观测裂纹扩展方向。结果加载条件下,裂纹周围显示应力集中区,条纹随载荷增加逐渐变密。由云纹干涉图位移场算得各组试件金瓷界面断裂韧性各不相同,其裂纹扩展方向也有差异。结论云纹干涉法适用于金瓷界面断裂韧性的研究,也可用于观测并预测裂纹的扩展方向及趋势。
瓷层厚度对牙龈瓷颜色的影响  [PDF]
孙俊,罗云,巢永烈
华西口腔医学杂志 , 2005,
Abstract: 目的 了解牙龈瓷的颜色再现受瓷层厚度影响的变化规律。方法 采用分光光度计(PR-650)测量不同厚度Shofuvintagepink龈色瓷,不同厚度牙本质瓷及不同颜色的遮色瓷和牙本质瓷对金瓷试件颜色改变的影响。结果 当Shofuvintagepink龈色瓷厚度从0·3mm增加到0·9mm,金瓷试件的L*值不断降低,a*值不断升高;牙本质瓷厚度的增加使试件颜色向亮度低,偏红方向变化;不同颜色遮色瓷、牙本质瓷层厚度会导致龈色瓷表面的颜色改变。结论 瓷层厚度可以影响牙龈瓷的颜色再现。
钧窑瓷  [PDF]
张琪
东南文化 , 2002,
Abstract: ????乳光釉和窑变是钧窑的两大特点,蓝、红是钧窑瓷的两大瓷色,胎体不净、胎色不纯是钧窑资的两大缺憾。
齐系陶文考释  [PDF]
张振谦
安徽大学学报(哲学社会科学版) , 2009,
Abstract: 《陶文图录》收录了大量的齐、邾、滕陶文,其中有许多疑难之字尚待考证,如“?”、“起”、“”、“?”、“狼”、“?”、“”、“?”、“戊”、“早”、“脊”等字。临淄后李出土的一方原释为“左酷右柘”齐陶文,应释为“左酷右户”。
彦和弃陶蠡测  [PDF]
张惠
湖南工业大学学报(社会科学版) , 2008,
Abstract: 文心雕龙!为何不论陶渊明? 从接受途径看, 陶作当时影响不如后世深远; 在. 原道、征圣、宗经# 原则和辞采、用典、声律等方面, 陶作不契合刘勰的批评标准; 陶作不能反映一时或一代风貌, 不符合刘勰 的创作意图。
全瓷修复体饰瓷疲劳损伤的初步分析  [PDF]
刘亦洪,冯海兰,刘光华,沈志坚
北京大学学报(医学版) , 2010,
Abstract: ?目的:通过对临床损伤失效的全瓷修复体的损伤形貌观察,分析全瓷修复体饰瓷疲劳损伤的机制和过程,以及缺陷与饰瓷损伤的关系。方法:收集断裂或破碎的全瓷修复体,体式显微镜和扫描电子显微镜(scanningelectronmicroscope,sem)观察其断裂面和咬合面微观形貌以及饰瓷的缺陷,x线衍射能谱分析(energy-dispersivex-rayspectroscopy,eds)饰瓷内不均质部分的化学成分。运用陶瓷损伤形貌分析的方法,分析全瓷修复体的断裂方式和损伤特征。结果:全瓷修复体的最终损伤失效包括完全断裂、饰瓷崩瓷和饰瓷脱瓷3种方式。氧化铝全瓷冠发生了完全断裂,氧化锆全瓷冠发生饰瓷崩瓷或饰瓷脱瓷。饰瓷疲劳损伤包括表面磨损、锥状裂纹和饰瓷脱瓷3种模式。饰瓷表面发现气孔和污染颗粒缺陷。结论:全瓷修复体应设计多点咬合接触,分散咬合应力。饰瓷脱瓷发生于饰瓷层过薄的情况,适当的饰瓷厚度保证饰瓷的抗疲劳损伤能力。临床需严格控制饰瓷烧结过程的环境污染。
从对陶谢的轩轾看王夫之的诗学观念  [PDF]
张晶,张佳音
- , 2015,
Abstract: 在诗学史上,魏晋南北朝时期的两位大诗人陶渊明和谢灵运一直以陶谢并称,而且是陶在谢前、重陶而轻谢的。但清初大思想家、文学家王夫之在其《古诗评选》中对陶诗和谢诗的评价则不同,扬谢而抑陶是其主要倾向。本文通过王夫之对陶谢的评价,透视其诗学批评的主要取向,王夫之论诗重现量、神理和势,都在对陶谢的评价中得到了具体体现。
Abstract:In the poetic history of Chinese literature, Tao Yuanming and Xie Lingyun, two great poets of the Six Dynasties, are always mentioned together. Although most of the literary criticism placed Tao ahead of Xie, Wang Fuzhi, an influential philosopher of the early Qing period, hold a different point of view in his Gushi pingxuan (critical selection of ancient poetry) and praised Xie over Tao. Wang invited the Buddhist idea “pratysa” into his poetic criticism, thought crystal images could only be created with pratysa, and that existed in Xie's poetry. He took “shenli” as ideal presentation; he had a negative opinion for “li” appearing in poem in the way of logic. “Shi” is the tension and direction of a poem; Wang emphasized “shi” in poetry. This paper is to explore the poetic ideas of Wang through the close reading of his criticism on the poetry of Tao and Xie, and furthermore makes a thorough discussion on the key terms of pratysa, shenli, and shi, which are essential in Wang's poetic system.
Effectiveness and improvement of cylindrical cloaking with the SHS lining  [PDF]
Allan Greenleaf,Yaroslav Kurylev,Matti Lassas,Gunther Uhlmann
Physics , 2007, DOI: 10.1364/OE.15.012717
Abstract: We analyze, both analytically and numerically, the effectiveness of cloaking an infinite cylinder from observations by electromagnetic waves in three dimensions. We show that, as truncated approximations of the ideal permittivity and permeability tensors tend towards the singular ideal cloaking fields, so that the anisotropy ratio tends to infinity, the $D$ and $B$ fields blow up near the cloaking surface. We also consider cloaking with and without the SHS (soft-and-hard surface) lining. We demonstrate numerically that cloaking is significantly improved by the SHS lining, with both the far field of the scattered wave significantly reduced and the blow up of $D$ and $B$ prevented.
Investigation on the Mechanism of SHS AlN
自蔓延高温合成(SHS)氮化铝反应机制的研究

CHEN Ke-Xin,GE Chang-Chun,LI Jiang-Tao,CAO Wen-Bin,
陈克新
,葛昌纯,曹文斌,李江涛

无机材料学报 , 1998,
Abstract: The mechanism for SHS AIN was investigated A novel quenching technique was used to retainthe high-temperature structure formed in the sample during combustion process. Based on themicrostructure observation and thermodynamic analysis, two-step mechanism for SHS AlN i.e.,vaporization of Al and subsequent reaction with N2 was proposed.
SHS技术研究进展——纪念SHS技术诞生三十周年  [PDF]
傅正义
复合材料学报 , 2000,
Abstract: 介绍了自蔓延高温合成技术的发展和国内外研究的概况,分析了SHS技术研究与发展的几个重要方向,介绍了SHS研究的最新动向,对中国学者在此领域的工作所取得的成果给予了介绍和评价。
Page 1 /100
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.