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论装饰雕塑的材料肌理 被引量:1
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作者 伍云秀 《武汉科技学院学报》 2003年第4期99-100,共2页
主要阐述装饰雕塑的材质肌理的特性及其对整个造型的影响。探讨材料肌理的应用与开发。
关键词 装饰雕塑 材料肌理 艺术造型 材料性能 材质心理效应 审美观念
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Effective Dielectric Response of Composites with Graded Material 被引量:1
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作者 YANGZi-Dong WEIEn-Bo SONGJin-Bao 《Communications in Theoretical Physics》 SCIE CAS CSCD 2004年第6期957-960,共4页
The effective dielectric response of linear composites containing graded material is investigated under an applied electric field E_0.For the cylindrical inclusion with gradient dielectric function,ει(r)=b+cr,random... The effective dielectric response of linear composites containing graded material is investigated under an applied electric field E_0.For the cylindrical inclusion with gradient dielectric function,ει(r)=b+cr,randomly embedded in a host with dielectric constant εm,we have obtained the exact solution of local electric potential of the composite media regions,which obeys a linear constitutive relation D=εE,using hypergeometric function.In dilute limit,we have derived the effective dielectric response of the linear composite media.Furthermore,for larger volume fraction,the formulas of effective dielectric response of the graded composite media are given. 展开更多
关键词 effective dielectric response graded composite effective medium approximation
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环境适应性试验中试件表面结露行为的CFD预测 被引量:1
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作者 曹宗宝 文磊 +3 位作者 金莹 王铭辉 杨斌 孙冬柏 《北京科技大学学报》 EI CAS CSCD 北大核心 2013年第2期207-215,共9页
针对环境仓内升温增湿过程,采用计算流体动力学(CFD)方法预测了试件的结露行为并加以试验验证.研究了被测试样的尺寸、材质对其表面结露行为的影响.测试结果表明,材料/构件的环境适应性试验中润湿时间存在明显的尺寸效应和材质效应,是... 针对环境仓内升温增湿过程,采用计算流体动力学(CFD)方法预测了试件的结露行为并加以试验验证.研究了被测试样的尺寸、材质对其表面结露行为的影响.测试结果表明,材料/构件的环境适应性试验中润湿时间存在明显的尺寸效应和材质效应,是该类试验中需要着重考虑的因素.通过优化建模,数值模拟结果与测试数据能够较好地吻合,表明可以利用数值模拟方法预测工程构件在环境适应性测试中的传热行为与结露规律. 展开更多
关键词 环境适应性 计算流体动力学(CFD) 结露 尺寸效应 材质效应
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Strain effects on valence bands of wurtzite ZnO 被引量:3
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作者 QIAO LiPing CHAI ChangChun +2 位作者 JIN Zhao YANG YinTang MA ZhenYang 《Science China(Physics,Mechanics & Astronomy)》 SCIE EI CAS 2013年第9期1684-1688,共5页
Based on the k.p theory of Luttinger-Kohn and Bir-Pikus,analytical E-k solutions for the valence band of strained wurtzite ZnO materials are obtained.Strain effects on valence band edges and hole effective masses in s... Based on the k.p theory of Luttinger-Kohn and Bir-Pikus,analytical E-k solutions for the valence band of strained wurtzite ZnO materials are obtained.Strain effects on valence band edges and hole effective masses in strained wurtzite ZnO materials are also discussed.In comparison with unstrained ZnO materials,apparent movement of valence band edges such as "light hole band","heavy hole band" and "crystal splitting band" at Γ point is found in strained wurtzite ZnO materials.Moreover,effective masses of "light hole band","heavy hole band" and "crystal splitting band" for strained wurtzite ZnO materials as the function of stress are given.The analytical results can provide a theoretical foundation for the understanding of physics of strained ZnO materials and its applications with the framework for an effective mass theory. 展开更多
关键词 strained ZnO band structure effective mass
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Rare earth doping effect on the optical properties of several fluorescence materials 被引量:1
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作者 WANG ShuTao WANG DongSheng +1 位作者 WANG YuTian PAN WeiWei 《Science China(Physics,Mechanics & Astronomy)》 SCIE EI CAS 2012年第7期1235-1239,共5页
Based on the optical properties of rare earth fluorescence materials, a set of fluorescence optical fiber systems was designed. The system selects the emitting LED, which is economical and practical as a light source.... Based on the optical properties of rare earth fluorescence materials, a set of fluorescence optical fiber systems was designed. The system selects the emitting LED, which is economical and practical as a light source. The experiment of the emission and excitation optical spectrum, decay curve of fluorescence and residuals for several sensitive materials confirms the match of Y2O2S:Eu using the light source and the feasibility of the system. The rare earth material Y2O2S:Eu is selected as the material candidate for being the most sensitive. 展开更多
关键词 PHYSICS fluorescence materials optical fiber optical spectrum
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Theoretical study of piezotronic heterojunction 被引量:1
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作者 FENG XiaoLong ZHANG Yan WANG ZhongLin 《Science China(Technological Sciences)》 SCIE EI CAS 2013年第11期2615-2621,共7页
Due to the coupling of piezoelectric and semiconducting dual properties,much attention has been focused on the piezoelectric semiconductor materials,such as ZnO,ZnS,CdS and GaN.With the usage of these piezoelectric se... Due to the coupling of piezoelectric and semiconducting dual properties,much attention has been focused on the piezoelectric semiconductor materials,such as ZnO,ZnS,CdS and GaN.With the usage of these piezoelectric semiconductor materials,novel nanodevices have been demonstrated,from which a new field called piezotronics was formulated.The core of piezotronics is to study the mechanism of the piezoelectric effect on tuning the charge transport behavior across various junctions or interfaces,with potential applications in sensors,microelectromechanical systems,and force/pressure triggered electric devices.Here following the theoretical frame work of piezotronic effect,analytical solutions of piezoelectric heterojunction are presented to investigate the electrical transport behavior at a p-n junction.Numerical simulation is given for guiding future experimental measurements. 展开更多
关键词 Piezoelectric Heterojunction piezoelectric semiconductor piezotronics
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