ITER校正场超导馈线系统地震分析

通过ANSYS建立校正场磁体馈线动力学分析有限元模型,利用反应谱法对馈线进行地震分析,获取馈线在地震载荷下的动力响应情况。分析结果表明,现有馈线结构设计可满足馈线地震要求。同时研究了支撑间隙对地震分析的影响,结果表明,馈线地震分析需要充分考虑支承间隙的影响。     

Discovering the generalized vectorial laws of multiple reflection and refraction

This paper reports on the discovery of the generalized vectorial laws of multiple reflection and refraction as an extension of the earlier discovery of the generalized vectorial laws of reflection and refraction reported in 2005. The present discovery is novel and original and interesting from academic point of view. It will enrich the field of optics.     

Shot noise in the hybrid triple-quantum-dot interferometer coupled to superconductor and normal terminals

The shot noise of a hybrid triple-quantum-dot (TQD) interferometer has been investigated by employing the nonequilibrium Green's function method, and the general shot noise formula has been derived. The oscillation behaviors of transmission coefficients and shot noise versus the Aharonov–Bohm phase ?   exhibit asymmetric Fano resonance structure and blockade effect. Sub-Poissonian and super-Poissonian behaviors of shot noise appear in different regimes of terminal bias e_Vγ$e{V}_{\gamma }$ contributed by the Andreev reflection, and correlation of Andreev tunneling with the normal electron transport. The inverse resonance and resonance structures emerge in the shot noise and Fano factor with respect to one of the gate voltages in different regimes of e_Vγ$e{V}_{\gamma }$. The asymmetric structure can be enhanced by modifying the energy levels and gate biases of the TQD. The self-correlation and cross-correlation of current components contribute to the enhancement and suppression of shot noise.     

In-Situ Diffuse Reflection FT-IR Spectroscopic Study of Pyrolysis of Lignite

Pyrolysis of lignite coal has been investigated in-situ by diffuse reflectance infrared spectroscopy. The diffuse reflectance spectrum of lignite coal is concluded to be made of Gaussian bands. The increase of aromaticity factor with temperature could be clearly evidenced from the C-H stretching region. Although quantitative analysis of the structural modification can not be performed at the moment, qualitative information can be provided at least from the peak intensity variations. This work demonstrates that the temperature and atmospheric effects on the physcochemical properties of powdered materials can be readily studied by interfacing the reflectance optics with a controlled environment reaction chamber.     

Capillary surfaces in a cone

We show that a capillary surface in a solid cone, that is, a surface that has constant mean curvature and for which the surface boundary meets the boundary of the cone at a constant angle, is radially graphical if the mean curvature is non-positive with respect to the Gauss map pointing towards the domain bounded by the surface and the boundary of the cone. In the particular case in which the cone is circular, we prove that the surface is a spherical cap or a planar disc. The proofs are based on an extension of the Alexandrov reflection method using inversions about spheres.     

Quantum Transport through a Triple Quantum Dot System in the Presence of Majorana Bound States

We study the electron transport through a special quantum-dot(QD)structure composed of three QDs and two Majorana bound states(MBSs)using the nonequilibrium Green’s function technique.This QD-MBS ring structure includes two channels with the two coupled MBSs being Channel 1 and one QD being Channel 2,and three types of transport processes such as the electron transmission(ET),the Andreev reflection(AR),and the crossed Andreev reflection(CAR).By comparing the ET,AR,and CAR processes through Channels 1 and 2,we make a systematic study on the transport properties of the QD-MBS ring.It is shown that there appear two kinds of characteristic transport patterns for Channels 1 and 2,as well as the interplay between the two patterns.Of particular interest is that there exists an AR-assisted ET process in Channel 2,which is different from that in Channel 1.Thus a clear"X"pattern due to the ET and AR processes appears in the ET,AR,and CAR transmission coefficients.Moreover,we study how Channel 2 affects the three transport processes when Channel 1 is tuned in the ET and CAR regimes.It is shown that the transport properties of the ET,AR and CAR processes can be adjusted by tuning the energy level of the QD embedded in Channel 2.We believe this research should be a helpful reference for understanding the transport properties in the QD-MBS coupled systems.     

医用基础化学原子结构的教学设计与思考

原子结构知识是学好化学的基础,其教学成败直接影响到学生对化学课程的学习。在多年教学思考和经验积累基础之上,将原子结构的发现过程与人的认知规律相结合并进行创造性的教学设计,不仅可极大地改善教学效果,而且还可培养学生的质疑精神与创新能力。     

中草药植物白光漫反射光谱研究

测定了 5 7种中草药植物的药用部分的白光漫反射光谱 ,与传统的紫外分光光度法及红外分光光度法相比 ,这种测定方法不用截取样品 ,可作无损检测 ,且测定过程简便。从测定结果发现 ,这些白光漫反射光谱都具有可作识别的特征峰 ,显然中草药的白光漫反射光谱可作为中草药鉴别的一种辅助方法。从测定的白光漫反射光谱中 ,还发现药用部分为地上部分的 (阳光下生长的 )在 6 5 0～ 6 90nm区间具有明显的大吸收峰 ,而药用部分为地下部分的或植物体内的 (不在阳光下生长的 ,如种子 )则没有 ,因此可利用某些中草药植物在 6 5 0～ 6 90nm区间的吸收特性用光控方法调控中草药的栽培生产 ,提高中草药的质量与产量。     

量子力学的Goos-Hanchen效应

指出量子力学也存在类似于电磁波的Goos-Hanchen效应．用二维波包在二维势阶的散射模型分析了Coos-Hanchen效应的内在原因．