检索结果-南通市图书馆

Chinese Physics B 2013年第8期22卷 404-409页

作者：焦重庆朱弘钊 State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power University

The cavity-mode resonance effect could result in significant degradation of the shielding effectiveness （SE） of a shielding enclosure around its resonance frequencies. In this paper, the influence of coated wall loss on the suppression of the resonance effect is investigated. For this purpose, an equivalent circuit model is employed to analyze the SE of an apertured rectangular cavity coated with an inside layer of resistive material. The model is developed by extending Robinson＇s equivalent circuit model through incorporating the effect of the wall loss into both the propagation constant and the characteristic impedance of the waveguide. Calculation results show that the wall loss could lead to great improvement on the SE for frequencies near the resonance but almost no effect on the SE for frequencies far away from the resonance.

关键词： electromagnetic shielding rectangular cavity wall losses resonance effect

Subwavelength rectangular cavity partially filled with left-handed materials

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2006年第6期15卷 1154-1160页

作者：姜田陈艳冯一军 Department of Electronic Science and Engineering Nanjing University Nanjing 210093 China

In this paper, we present the electromagnetic analysis of a rectangular cavity partially filled with a left-handed material slab. Our theoretical investigation shows that there exist novel resonant modes in the cavity, and such a cavity becomes a subwavelength cavity. The eigenvalue equation of the cavity is derived and the resonant frequencies of the novel modes are calculated by using numerical simulation. We also discuss the stability of the novel resonant modes and show the best condition under which a useful rectangular cavity of subwavelength dimensions with tolerable stability is obtained.

关键词： left-handed material rectangular cavity subwavelength resonator stability

Chiral selection of Troger's base-based macrocycles with different ethylene glycol chains length in crystallization

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 Chemical Letters 2023年第7期34卷 127-130页

作者： Haohui Feng Yuan Chen Ranran Wang Pengbo Niu Conghao Shi Zhen Yang Ming Cheng Juli Jiang Leyong Wang Jiangsu Key Laboratory of Advanced Organic Materials School of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210023China Maanshan High-Tech Research Institute of Nanjing University Maanshan 238200China The Cancer Hospital of the University of Chinese Academy of Sciences(Zhejiang Cancer Hospital) Institute of Basic Medicine and Cancer(IBMC)Chinese Academyof SciencesHangzhou310022China

In the present work,two Troger's base-based macrocycles(TBBMs)with different bridging ethylene glycol chains(T1,n=1;T3,n=3)were successfully synthesized and studied via the crystal *** two TBBMs possess rare rectangular-like cavities and show chiral selection during the crystallization.T1with short glycol chain(n=1)crystallized as racemates,while T3 with long glycol chain(n=3)was found as meso *** contrast to T1 and T3,for T2(n=2)both rac-T2 and meso isomer R2NS2N-T2has been observed in our previous ***,the synthesis of new TBBMs T1 and T3 with different bridging ethylene glycol chains not only makes the study of TBBMs more systematically,but also helps to understand the relationship between the size of the rectangular cavity and the chiral selection of Troger's base-based macrocycles during their crystallization.

关键词： Supramolecular macrocycle Tr?ger’s base Chiral selection rectangular cavity Glycol chains

Casimir Effect at Finite Temperature in the Presence of Compactified Universal Extra Dimensions

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 Physics Letters 2005年第12期22卷 3032-3035页

作者：程红波 Department of Physics East China University of Science and Technology Shanghai 200237

We analyse the Casimir effect for parallel plates at finite temperature in the presence of compactified universal extra dimensions and analytically show the thermal corrections to the effect in detail. The Casimir effect for different sizes of universal extra dimensions is investigated to test the five-dimensional Kaluza-Klein theory.

关键词： rectangular cavity BRANE-WORLD MILLIMETER HIERARCHY ENERGY ADS(5) FORCE

Casimir effect for a cavity in the Spacetime with an Extra Dimension

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 Physics Letters 2005年第9期22卷 2190-2193页

作者：程红波 Department of Physics East China University of Science and Technology Shanghai 200237

We reexamine the Casimir effect for the rectangular cavity with two or three equal edges in the presence of compactified universal extra dimension. We derive the expressions for the Casimir energy and discuss the nature of Casimir force. We show analytically the extra-dimension corrections to the standard Casimir effect to put forward a new method of exploring the existence of extra dimensions of the Universe.

关键词： rectangular cavity REPULSIVE NATURE BRANE-WORLD MILLIMETER HIERARCHY ENERGIES FORCE