Transport of waves in disordered waveguides: A potential model

We study the statistical properties of wave transport in a disordered waveguide. We first derive the properties of a “building block” (BB) of length δL starting from a potential model consisting of thin potential slices. We then find a diffusion equation—in the space of transfer matrices that describe our system—which governs the evolution with the length L of the disordered waveguide of the transport properties of interest. The latter depend only on the mean free paths and on no other property of the slice distribution. The universality that arises demonstrates the existence of a generalized central-limit theorem. We have developed a numerical simulation in which the universal statistical properties of the BB found analytically are first implemented numerically, and then the various BBs are combined to construct the full waveguide. The reported results thus obtained are in good agreement with microscopic calculations, for both bulk and surface disorder.     

Complex turing patterns in non-linearly coupled systems

Recently pattern formation in layered structures, showing complicated superimposed patterns, has been modeled by coupling two Turing systems linearly, i.e., passively, such that the characteristic length scales of the independent systems are well separated. Here we propose a model of two non-linearly coupled Turing systems to study pattern formation in layered membrane-like structures, where the coupling plays an active role and changes the kinetics of the uncoupled systems. Extensive numerical simulations show that non-linear coupling generates a number of new regular patterns different from the ones observed earlier with linearly coupled systems. Some of them turn out to be superimposed patterns with different length scales, but many are not. Also, contrary to the linear coupling case, the strength of the non-linear coupling is found to play an important role in the formation and selection of patterns.     

First-principles study of fundamental properties and electronic structure of alloys

We have performed first-principles calculations using full-potential augmented-plane-wave method to investigate the fundamental properties of the Cd_1–xZn_xTe alloys. The composition dependence of the lattice constant and the bulk modulus have been estimated from total energy calculations. By means of the analytical fitting the band structures in the vicinity of the Brillouin center a complete set of effective electron- and hole-masses have also been derived. In order to further understand the effects of the chemical bonding on the above macroscopic properties we then studied the relaxation behaviors and the changes of the electronic states upon alloying for x=0.25 system. The results presented here yield a general understanding of the fundamental properties for the Cd_1–xZn_xTe crystals studies.     

提高专业基础课程学习的兴趣

课程教学质量直接影响学生学习的积极性,专业基础课程质量直接影响专门人才的培养。从"激光原理及应用"专业基础课程的教学过程如何激发学生的学习兴趣出发提出了一些想法,以打造顺应时代发展的光电子技术人才。     

体育专业篮球专项课采用计算机辅助教学(CAI)的研究

计算机辅助教学(CAI)是现代信息技术应用于教育的核心内容和主要技术手段.作为一种新的现代教学方法和手段,CAI已广泛应用于教育教学的各个领域.将CAI技术引入高校体育专业篮球专项实践课教学有利于改进教学方法与体系,提高学生学习的主动性,加强学生学习的针对性,提高教师的教学水平,促进学生的学习积极性,加速体育知识的更新速度.     

中国近代以来教师称谓的演变

近代以来,教师的称谓随着时代变革发生了巨大的变化,从洋务运动兴办新式学堂中“教习”到清末的《奏定学堂章程》中“教员”;从建国后的大中小学校中的“老师”,到文革中被批斗的“臭老九”,教师称谓同社会发展密切相连。对近代以来,教育中存在的“教习”、“教员”、“老师”、“臭老九”、“先生”等称谓进行梳理,探讨它们的来历及发展演变过程,对于加深教师称谓的了解,形成尊师重教的良好风尚是有益的。     

论图书馆员职业发展规划及其完善

职业发展的规划和完善对于图书馆员及图书馆发展至关重要。而当前的图书馆员在职业发展规划上存在职业意识薄弱、职业层级单一、职业竞争力不强、职业教育管理缺失等诸多问题。因此,需从上述几个方面来加强图书馆员的职业规划。     

我国高中篮球教练员执教能力研究

高中篮球队是我国高校篮球队的后备军,高中篮球队的训练过程具有承上启下的关键性作用.我国大学生篮球运动(简称CUBA联赛)水平的提高在很大程度上有赖于高中阶段的训练成果,而高中阶段的训练质量如何关键又取决于教练员的训练水平.通过问卷调查法和访谈法对我国高中篮球教练的执教能力进行分析,对我国高中篮球教练员的执教状况做出客观评价,提出为提高我国高中篮球教练员的执教能力的政策建议.     

试论职前英语教师的专业发展——同伴录像在免费师范生教育实习中的有效应用

为创新实践教学、提高实习实效,在免费师范生教育实习中开展基于社会建构主义、多模态话语分析理论的同伴录像.通过构建基于同伴录像的教育实习体系,在集体备课→导师教案指导→上课与同伴录像→录像回放→刺激回忆与导师、同伴讨论→个体反思→教学新设计→教学新行动等循环往复的过程中,提升实习生的课堂教学自信与专业发展意识,发展与他人合作交流的能力,提高教学技能与反思能力,促进了职前英语教师的专业发展.     

高校图书馆员职业道德建设和培养

根据《中国图书馆职业道德准则(施行)》对高校图书馆的职业道德建设和培养的要求,提出几点建议,即职业道德建设和培养离不开管理者自身的建设,并应注重加强对馆员的思想意识和道德修养等方面的建设。