检索结果-南通市图书馆

MULTIPLE-SCATTERING STUDIES OF ADSORPTION STRUCTURE OF C_2D_2/Si(111)7×7

在线全文

学校读者我要写书评

暂无评论

Acta Metallurgica Sinica(English Letters) 2002年第2期15卷 227-232页

作者： P.Zhu. J.C. Tang. S. Cao and L. Wang department of Physics, Zhejiang university, Hangzhou 310027. china department of Physics Zhejiang University

The multiple scattering cluster (MSC) method has been employed to perform a theoretical analysis on carbon is near edge X-ray absorption fine structure of the deuteron acetylene (C2 D2) adsorbed on Si(111)7× 7 at room temperature. From the MSC study. it is confirmed that the (22D2 molecule is bonded to a pair of adjacent Si adatom and Si restatom with C-Si bond length about 0.18nm. The carbon-deuteron bond is bent away front the surface and the CCD bond angle is about 120°. The molecule plane tilt slightly away from the surface normal. Compared with C2D2 in gas phase, the C-C bond and C-D bond are elongated by about 0.03nm and 0.02nm respectively when acetylene was adsorbed on the subtrate. Keyowrds: adsorption of deuteron acetylene on Si(111)7×7. near edge X- ray absorption fine structure. multiple scattering cluster method

关键词： adsorption of deuteron acetylene on Si(111)7×7 near edge X-ray absorption fine stracture multiple scattering cluster method

在线全文

学校读者我要写书评

暂无评论

个别化教学的历史透析

新乡师范高等专科学校学报 2002年第4期16卷 87-88页

作者：李会先周慧梅河南师范大学数学与信息科学学院，河南新乡453002 河南师范大学教育系，河南新乡453002

中国教育正面临着一场变革，素质教育已深入人心，个别化教学作为推进素质教育的一个有效措施，逐渐成为人们关注的热点，但我国的传统是以社会本位为价值取向的。教师对个别化教学的理解多局限于技术操作层面，这直接影响到个别化教学... 详细信息

中国教育正面临着一场变革，素质教育已深入人心，个别化教学作为推进素质教育的一个有效措施，逐渐成为人们关注的热点，但我国的传统是以社会本位为价值取向的。教师对个别化教学的理解多局限于技术操作层面，这直接影响到个别化教学的有效实施，因此，我们有必要对个别化教学的历史进行梳理，总结经验，以推进素质教育的发展。

关键词：个别化教学素质教育历史透析

区域上Triebel-Lizorkin空间的原子分解与限制定理

在线全文

学校读者我要写书评

暂无评论

数学年刊（A辑） 2003年第1期24卷 73-80页

作者：王衡庚陶祥兴华南师范大学数学系广州510631 宁波大学数学系浙江宁波315211

本文在区域Ω( Rn,n≥1)上定义了某类在边界上消失的Triebel-Lizorkin空间 ,并给出了它的原子分解定理,对偶定理.同时证明了当区域时。

关键词： Triebel-Lizorkin空间原子分解对偶定理限制和扩张定理

X-ray Spectra Induced by 40Ar17+ Interacting with Au Surface

在线全文

学校读者我要写书评

暂无评论

IMP & HIRFL Annual Report 2005年 120-121页

作者： Zhang Xiaoan, Xiao Guoqing, Zhao Yongtao, Yang Zhihu and Chen Ximeng department of Physics, Xianyang normal university, Xianyang. department of Modern Physics, Lanzhou university, Lanzhou.

When a highly charged ion with many inner shell holes is approaching to a metallic surface, the conducting -band electrons in the metal can resonantly transfer into the high orbits of the projectile at a large distance. In this way, the ion could be temporarily neutralized to form a hollow atom with outer shell occupied and inner shells empty. The hollow atoms may de-excite by auto ionization, Auger electron emission and cascade radioactive X-rays. At the very moment when the projectile reaching the surface, its outer shell electrons will be partly peeled off, however the holes in the inner-most shell could still survive for a

关键词：

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

制备双羟基四配位硅化合物的动力学探讨

天水师范学院学报 2003年第5期23卷 26-28页

作者：王小芳宋建华天水师范学院化学系甘肃天水741001 广州大学化学系广东广州510405

高反应活性的五配位硅钾化合物与2-氯乙醇反应制备双羟基四配位硅化合物及动力学行为，如温度、不同反应物摩尔比、催化剂等因数对该反应平衡常数和速率常数有影响，并选择出该反应的最佳合成条件。

关键词：制备双羟基四配位硅化合物动力学行为速率常数反应平衡常数合成条件

The Study on Discharge Characteristics and Decolorization Process Using the Dielectric Barrier Discharges with Grounded Spraying Water Electrodes and Wide Air Gaps

在线全文

学校读者我要写书评

暂无评论

The Study on Discharge Characteristics and Decolorization Pr...

Dental Structure and Element Analysis of Patients with Congenital Insensitivity to Pain with Anhidrosis

The Fourth International Conference on Applied Electrostatics

作者： Wu Yan, Xu Dexuan, Li Jie, Wang Ninghui, Zhang Ruobing, Yan LimingInstitute of Electrostatics and Special Power, Dalian university of Technology, Dalian 116024, china department of Environmental Science and Engineering, Northeast normal university, Changchun 130024, china

＜正＞In this paper, both the discharge characteristics and electrode configuration of dielectric barrier discharge with grounded spraying water electrodes and wide air gaps are introduced. The decolorization experiments for aqueous solution of indigo carmine were carried out by AC 50 Hz high-voltage power supply. The decolorazition rate has got to 80.8% in 30 minutes. The measurements of ozone concentration in water suggested that the decolorization should be attributed to the active species, in which OH radical was a major component. The power consumptions was also researched and discussed in this paper.

关键词： Dielectric barrier bischarges Grounded spraying water electrodes Decolorization

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Dental Structure and Element Analysis of Patients with Conge...

2012全国发育生物学大会

作者： Li Gao~(1,2*),Yudi Bai~1,Kun Xuan~1,Lingying Wen 1 department of Pediatric Dentistry,School of Stomatology,The Fourth Military Medical university,Xi’an 710032,china 2.department of Pediatric Dentistry,School of Stomatology,Zhengzhou university,Zhengzhou 450002,china

The aim is to investigate the structure and elements of deciduous teeth in a patient with Congenital insensitivity to pain with anhidrosis(CIPA),using scanning electron microscopy(SEM) and energy dispersive X-ray spectroscopy (EDS).The deciduous teeth of a CIPA patient were collected,The morphological changes were observed by *** weight percentages(wt%) of calcium(Ca),phosphorus(P),and carbon(C) were determined using EDS.T tests were performed(p≤0.05) to distinguish significant differences between CIPA and *** patient has typically clinical characteristics of *** analysis of Ca、P and C in tooth was significantly statistical significance than that of in *** SEM micrographs revealed morphological *** enamel of the teeth in CIPA was shown less than that of the corresponding normal teeth and enamel robs were thin and short;the density of dentinal tubule in CIPA was lower than that of in normal and dentin appeared irregular,size and distribution appeared ***-dentin junction is more wide,and significant differences were detected in Ca,C,and the ratio of Ca/P and Ca/C in CIPA. Contusions:The tooth has an effected on histological structure and elements of deciduous teeth for CIPA.

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

中学生特质焦虑与其影响因素的模型建构

心理学报 2002年第3期34卷 289-294页

作者：李焰张世彤王极盛中国科学院心理研究所北京100101 沈阳师范大学教育系沈阳110034

该研究旨在建构特质焦虑与其影响因素的关系模型。文中提出了影响特质焦虑的三个潜变量 ,分别是人格、学业压力、环境。其中人格包括自卑倾向和内向性格两个指示变量 ,学校压力包括学业压力和人际困扰两个指示变量 ,环境包括不良社会影... 详细信息

该研究旨在建构特质焦虑与其影响因素的关系模型。文中提出了影响特质焦虑的三个潜变量 ,分别是人格、学业压力、环境。其中人格包括自卑倾向和内向性格两个指示变量 ,学校压力包括学业压力和人际困扰两个指示变量 ,环境包括不良社会影响、学校适应不良、身体虚弱和父母不良教养方式等指示变量。研究结果发现 ,人格和学校压力直接导致特质焦虑 ,环境通过对人格和学校压力产生影响而间接影响特质焦虑 ,同时。

关键词：中学生特质焦虑影响因素模型

在线全文

学校读者我要写书评

暂无评论

不同浓度珍霉素滴眼剂对正常兔眼的刺激性

中国新药与临床杂志 2003年第9期22卷 545-547页

作者：马盈吴静安陶佩珍吴星伟张皙上海交通大学附属第一人民医院眼科上海200080 北京大学第一医院眼科北京100034 中国医学科学院医药生物技术研究所北京100050

目的 :探讨不同浓度抗病毒药珍霉素滴眼剂对正常兔眼的刺激性。方法 :观察 10mg·L- 1,2 0mg·L- 1,30mg·L- 1,4 0mg·L- 1浓度珍霉素滴眼剂 ,生理盐水及赋形剂对正常兔眼的刺激性 ,每组随机分成 10只兔眼 ,每日滴眼 5次 ,每次 2滴 ,连... 详细信息

目的 :探讨不同浓度抗病毒药珍霉素滴眼剂对正常兔眼的刺激性。方法 :观察 10mg·L- 1,2 0mg·L- 1,30mg·L- 1,4 0mg·L- 1浓度珍霉素滴眼剂 ,生理盐水及赋形剂对正常兔眼的刺激性 ,每组随机分成 10只兔眼 ,每日滴眼 5次 ,每次 2滴 ,连续10d。采用双盲法用裂隙灯观察兔眼病变情况并评分。结果 :各实验浓度的珍霉素滴眼剂对正常兔眼均无刺激性 ,与生理盐水和赋形剂比较 ,差异均无显著意义。结论 :珍霉素作为一种新型的抗单纯疱疹性角膜炎的药物 ,对眼部的刺激性极低。

关键词：珍霉素滴眼剂单纯疱疹性角膜炎眼部刺激性试验动物实验