光波导器件应用及其表面光滑化研究综述

光波导器件在许多领域都有着广泛的应用和良好的发展前景。而波导器件表面粗糙度影响传输光损耗和环形腔Q值,制约光波导器件的发展和应用。目前常用波导器件表面和侧壁光滑化方法有热氧化法、激光束法和氢退火法,其中氢退火法有较好的光滑化效果,但对于氢退火工艺的机理并不清楚,无法进一步优化实验参数,达到最佳实验效果。在对上述内容进行综述的基础上,通过Materials Studio仿真分析,初步研究了退火机理,基于仿真研究结果,分析氢气环境对退火过程的意义,为应用氢退火工艺对波导器件光滑化实验提供理论指导。     

高校语音实验教学设备管理中常见问题分析

语音实验室是完成外语实践教学任务,培养提高学生视、听、说能力的重要场所。近年来,一些高等学校语音实验室的音视频设备由于缺乏有效的管理和维护,经常出现运行故障,严重影响了正常的外语实践教学。针对高校语音实验室的特点,对高校语音实验教学设备管理中遇到的常见问题进行详细的分析,提出了语音设备维护和管理的一些相应对策。高效和完善的管理才能使语音实验室的建设逐步走向专业化、现代化、数字化和智能化,提高外语语音实验教学效果。     

英语中常见的歧义现象及消除方法

从语言三要素的角度归纳了英语中常见歧义现象的类型； 分析了导致歧义现象的种种因素及诸因素对语言交际的影响， 从而找出辨识及消除歧义的基本方法， 以达到在英语语言交际中准确地表达思想、传递信息     

略论中国航天器名字的英译

中国航天器名用汉语拼音作为英译存在不足。作者建议中国航天器名英译应以意译为主，并提出了航天器名意译的原则，最后给出了中国全部航天器名的意译建议。     

湖南东安高峰土话语音研究

湖南东安土话分为花桥片、中田片、井头圩片和高峰片四片。文章对高峰片土话的语音特点作了一个概略介绍,包括声韵调以及中古声韵调在高峰土话中的一些演变特点。     

纳米管、纳米线电子器件的研制

介绍了利用微加工方法制做单根纳米管和纳米线电子器件的过程,实现了几百纳米电极间距的器件制做,为进行单根纳米线电子器件的电子输运测量提供了可能.     

Research on the special lifting devices for steel box girders of Sutong Bridge

Sutong Bridge is a cable-stayed bridge with a steel box girder and a main span of 1 088 m. The steel box girder of main span includes five portions ： back span large unit, large block of pylon, standard girder, back span closure girder and middle span closure girder. Each back span large unit is fabricated by welding several deck segments together in factory, and is erected by floating crane. As navigational clearance of the main bridge is high, the traditional truss lifting device can＇ t satisfy the requirement of domestic lifting cranes for this kind of lifting height and weight. Hence, a kind of lighter lifting device for the erection of back span large units was accepted for this bridge. In this paper, the design and use of this lifting device is introduced. The upper structure used lifting gantry to install the standard girder segment by cantilever method. Because the bridge＇ s navigation clearance is high, and the girder segment is wide and heavy, the meteorology and hydrology condition of the bridge district is abominable, and the requirements of long cable girder side pull-in, structure and performance propose high request to the lifting gantry. In this paper, the design and use key point of long cable pull-in angle adjustment device integrate into lifting gantry, is introduced.     

Accuracy and Electromagnetic Safety Evaluation of a Portable Electromagnetic Localization System for Micro Invasive Medical Devices in Vivo

Aiming at localizing the telemetric capsule for detecting gastrointestinal physiological parameters in vivo accurately, a portable alternating current ( AC ) electromagnetic localization system is designed. To verify the feasibility of the method, the model and construction of the localization system are detailed. And static and dynamic accuracy of the localization system are tested by experiments. Next, we compare the simulating results of the electromagnetic radiation aroused by the localization system with the electromagnetic safety standards of human (ICNIRP guidelines and IEEE standard C95. 1 - 1991).Finally, in terms of the results of the static and dynamic experiments, conclusions are drawn that the accuracy of portable positioning system is high (less than 10 mm)enough to satisfy the localization need of the micro invasive medical devices in vivo, and there is no harm of electromagnetic radiation to human.     

赣方言区普通话水平测试中的语音偏误调查

本文在对赣方言区普通话水平测试成绩调查的基础上,分析了赣方言区考生常见的语音偏误,以及各等级的偏误特点,指出了调查分析结果对赣方言区普通话水平测试和普通话教学的积极作用。