内蒙古自治区循环经济发展模式及评价体系研究

构建了内蒙古自治区循环经济发展模式,建立了循环经济发展水平评价指标体系并对内蒙古自治区循环经济的发展现状进行评价,为内蒙古自治区发展循环经济提供了参考依据和理论借鉴。     

基于飞机目标的仿射不变矩研究

在分析不变矩的原理的基础上,将不变矩原理运用于航空图片飞机机型识别,同时提取图 像的三阶仿射不变矩作为特征输入,建立了对飞机图像的识别系统,完成了目标的最后匹配和识别。     

应用订单教育实现高职双元制培养模式

采用双元制培养模式能加强学生实践能力的培养,有利于高职汽车整形技术专业人才培养目标的实现。在实施双元制培养模式的过程中会遇到很多困难,采用订单教育是克服这些困难的有效途径。     

Carbon nanotube–polymer composites for photonic devices

We report the fabrication of high optical quality single wall carbon nanotube polyvinyl alcohol composites and their application in nanotube based photonic devices. These show a broad absorption of semiconductor tubes centred at 1.55 μm, the spectral range of interest for optical communications. The films are used as mode-lockers in an erbium doped fibre laser, achieving 700 fs mode-locked pulses. Raman spectroscopy shows no damage after a long time continuous laser operation.     

Recent progress in optical devices for mode division multiplex transmission system

The idea of adopting the space domain as the next frontier for optical communication has received increasing attention in the last few years. Optical devices are the integral parts of a mode division multiplexing (MDM) transmission. Therefore, conducting an intensive study on the devices is paramount to the successful realization of the overall system. This paper presents a review of the recent advances in the inline components of an MDM system, consisting of mode converters, spatial (de) multiplexers, optical amplifiers, and few-mode fibers (FMFs). Also presented are different mode conversion and multiplexing schemes. Recent techniques of minimizing differential mode gain (DMG) in the optical amplifiers are also reviewed. The review covers other types of amplification schemes and their current standing in the MDM system. These include optical semiconductor amplifiers (OSAs), and the Raman amplifiers (RAs). Finally, the review also highlights the role of FMF, multicore fiber and their relationship with fan-in/fan-out devices.     

全固双层芯色散补偿光子晶体光纤的研究与设计

为了补偿光纤色散对高速信号传输的限制,提出一种全固双层芯色散补偿光子晶体光纤.首先对该光纤模式耦合特性进行理论分析,然后利用多极法进行模拟计算,得到该光纤包层结构参数与色散值以及相位匹配波长之间的关系,并对其规律进行研究.通过优化光纤结构参数,得到在1 550nm处,色散值达到-32 620ps/(nm·km)、损耗为0.29dB/km、与标准单模光纤的熔接损耗为4.77dB的色散补偿光纤.该光纤可补偿1 910多倍长度的SMF-28单模光纤的色散,补偿能力远大于常规色散补偿光纤.与空气孔-石英结构色散补偿光子晶体光纤相比,全固色散补偿光子晶体光纤具有易制备、易与传统通信光纤熔接等优点.     

印制电路工程专业卓越工程师培养探索

该文从分析卓越工程师培养计划的培养目标出发，探讨本科生印制电路工程专业工程师培养存在的问题，提出针对卓越计划修订印制电路教学大纲、编写实用教材、建立校外实习基地、校企联合培养等培养实用创新型印制电路工程人才的思路。     

高职院校职业英语教学模式之构建

在深入调查研究的基础上,对目前高职英语教学存在的问题进行剖析,并就如何转变教学观念、努力构建创造性职业英语课堂教学新模式提出了建议,以更好地落实"以服务为宗旨,就业为导向"的高等职业技术教育的办学方针.     

科技期刊信息传播存在的一些问题及对策

文章以当下科技信息传播模式为研究对象,分析了各类媒体在传播科技信息方面存在的优长和不足,特别指出了科技信息网络传播过程中存在的问题及相关对策。     

Influence of DC Supply Systems on Unplanned Reactor Trips in Nuclear Power Plants

IntroductionMany factors influence the economics ofnuclear power plants.Unplanned reactor trips arethe most important factors,so it has beeninvestigated from various aspects because oftheirinfluence on the operating capacity factor inNuclear Power Plants ( NPPs ) .Operationalexperience has shown thatsome components in theNPPs are so importantthattheir failure may causethe entire plantto shutdown.Such shutdowns haveoften occurred in the pastin the NPPs.So,nuclearpowerplantauthorities have…