探讨中大型电动机的噪声与振动

讨论了我国噪声的国标的更新、噪声研究的理论基础、振动研究的理论基础、国内的研究五个方面的特点、研究历程,论述了中大型电动机研究关注的五个方向。     

科技资源共享研究框架体系的探讨

科技资源共享是一项复杂的系统工程，既需要实践也需要理论研究。本文系统地探讨了科技资源共享的理论研究方法和内容，首先建立了科技资源共享研究框架体系，包括共享的基础研究、过程研究和价值实现研究三大部分，在此基础上，分别对科技资源的属性和特点、实证和模型、价值规律、共享与人文、产权关系、共享服务、评估与监督、共享的实践和科技资源的产业链等方面进行了研究。     

实证研究：目前仍为主流的研究范式

19世纪末,人们将实证研究范式引入教育研究中,试图通过实证性的研究促进教育学成为科学。20世纪20、30年代,随着描述统计、推断统计和多元数据分析的快速发展,实证研究在西方国家中占有重要的地位。瑞典教育家胡森称之为教育研究史上“量化研究的全盛期。直到50、60年代,实证研究在教育研究中还处于统治地位。     

洛阳轴承（LYC）研发轨道交通车辆轴承入围洛阳科技计划

洛阳轴承（LYC）研制的城市轨道交通车辆用轴承研发及产业化项目包括地铁车辆、轻轨车辆用轮轴轴承。主要研究内容为轴承优化设计研究、加工工艺方法研究、材料及热处理研究、试验技术研究和密封技术研究,最终达到突破制约我国城市轨道交通车辆轴承研发的瓶颈,     

美国高等教育领导研究：范式流变与理论解读

美国高等教育领导研究的特征和行为理论、权力和影响理论、复杂和混乱理论以及认知理论等,从不同的侧面阐释了有效的高等教育领导者的价值倾向、个性特征、行为模式和影响因素。随着研究的不断深入和人类知识的日益丰富,美国高等教育领导研究的研究内容、研究路径和研究对象发生变革,后现代建构主义理论成为构建新研究范式的主导思想。     

结构拓扑优化设计综述

从离散体结构拓扑优化和连续体结构拓扑优化两个方面,对结构拓扑优化的发展历程和研究现状进行了评述,提出了拓扑优化在理论研究、实际应用、拓展研究和软件研究等方面的研究方向.     

中国高等教育分类研究现状述评

中国高等教育分类研究起步于20世纪90年代中期，2003年以来逐步形成了研究热潮，但尚处于以介绍和借鉴国外高校分类法及制度为主的起步阶段。研究对象上侧重于高校分类，研究内容集中于文献研究和案例研究，研究成果集中于对现有分类法及分类政策的介绍、评述、反思和批判。今后一段时期，我国一方面要将高等教育分类研究的视野从高校层面提升到高等教育层面，加强专题研究和理论研究，另一方面要加强原创性研究和应用研究，集中力量研究中国高等教育分类（含高校）的依据、标准、指标及配套的制度和政策框架，并进行分类的应用性试验和试点。     

浅析我国电力市场的现状及改革趋势

当前针对我国电力市场相关领域的研究已成为当今社会的热门话题,但由于缺乏总体规划、研究力量的分散、分工协作不够、脱离国情、忽视理论研究等问题的存在,电力市场研究一直没有取得实效性的研究成果,在对前人研究借鉴总结的基础上,对我国电力市场的现状及改革趋势进行了简要分析。     

非接触式机械密封基础研究现状与展望

非接触式机械密封由于其低磨损、高可靠性而成为密封领域研究的热点.本文从基础研究、实验研究两个方面对非接触式机械密封的研究现状进行了综述.其中基础研究主要从密封工作机理、端面构型设计、密封环材料与表面改性技术三个方向进行讨论.并对非接触式机械密封的研究进行了展望.     

我国教育适应与超越研究20年：回顾与反思

20世纪90年代初期以来,我国教育适应与超越研究涉及的主要内容包括教育适应与超越的含义、理论基础、相互关系、实践体现等。相关研究改变了仅以教育的适应性来理解教育与人和社会之间关系的局限,顺应了时代潮流,体现了以人为本的思想,但尚存在基本概念含糊、理论视野有待扩展、实践问题研究不足、研究方法单一等问题。今后的相关研究要廓清基本问题,更新扩大理论视野,拓展深化实践问题的研究,实现研究方法的多元。     

电致发射蓝光和蓝绿光的有机薄膜的研究进展

概述了电致发射蓝光和蓝绿光的电致发光薄膜器件的结构、材料、发光机理、目前研究的状况、出现的问题以及研究的发展趋势。     

稀土有机配合物作发光层的有机电致发光薄膜的研究进展

概述了稀土有机配合物电致发光薄膜器件的材料、结构、发光机理。介绍了目前研究的状况、出现的问题以及研究的发展趋势     

新型有机光电功能薄膜的电致发光研究

给出了一种新型的有机发光二极管(OLED),发光层选用新型的具有光电效应、热稳定性好、有良好电子传输能力的小分子材料:艹北酸四甲酯TMEP。比较了双层器件ITO/NPB/TMEP/Al和单层器件ITO/TMEP/Al的性能。双层器件的最低阈值电压为5V,器件发射红光,峰值为600nm。     

Organic optoelectronics ： materials, devices and applications

1Introduction Beforethediscoveryofelectricallyconduc tivepropertiesthroughdoping,polymerswere widelyusedaselectricalinsulatorsduetothesu periorinsulatingpropertiestheyexhibited.In1977,thediscoveryofthefirsthighlyconductive polymer,chemicallyandelectrochemicallydoped polyacetylene,wasreported[12].Thediscovery ofdopedpolyacetylenehasopenedanentirenew fieldforpolymersandorganicmaterialsintheir applicationstobothconductorsandsemiconduc tors.Althoughtheinitialemphasiswasonthe conductivepropertiesob…     

Circular Electromagnetic-Acoustic Converter of Surface Waves

The paper suggests a design of an electromagnetic-acoustic converter shaped as a ring and emitting and detecting circular surface waves. Several examples demonstrate that such converters can be used in nondestructive testing, namely, in detecting surface cracks and evaluating anisotropy of sheet materials.     

某车型气味性能的分析与整改

为提升某款车型气味等级,改善车内空气质量,将整车拆解为零部件总成,通过主观的气味评价方法识别出高危零部件;将高危零部件分解为若干子零件,识别出影响气味最大的材料,同时结合全谱进行物质筛查,锁定影响零部件气味的散发物质;通过分析散发性物质的主体来源,从生产原料及助剂、工艺、仓储条件等多维度,对材料和零部件进行优化和改进。结果表明:改进后的零部件气味等级提高到标准要求。     

LED封装光学结构对光强分布的影响研究

从发光二极管的发光原理及结构出发,建立了发光二极管的光学模型,获得了发光二极管的光强分布曲线,并与实际测量数据进行了比较。通过改变模型中反光碗的张角、支架的插入深度、封装环氧树脂折射率以及透镜尺寸,得到不同结构参数下的光强分布。实验结果表明：反光碗张角、支架插入深度、封装环氧树脂折射率以及透镜尺寸对LED光强分布的影响有一定的规律性。这些规律对生产特定光强分布需求的LED具有实际的指导意义。     

The application of water soluble,mega‐Stokes‐shifted BODIPY fluorophores to cell and tissue imaging

BODIPY (4,4‐difluoro‐4‐bora‐3a,4a‐diaza‐s‐indacene) fluorophores are widely used in bioimaging to label proteins, lipids and nucleotides, but in spite of their attractive optical properties they tend to be prone to self‐quenching because of their notably small Stokes shift. Herein, we compare two BODIPY compounds from a recently developed family of naphthyridine substituted BODIPY derivatives, one a visible emitting derivative (BODIPY‐VIS) and one a near‐infrared emitting fluorophore with a Stokes shift of approximately 165 nm as contrast reagents for live mammalian cells and murine brain tissue. The compounds were rendered water soluble by their conjugation to polyethylene glycol (PEG). Both PEGylated compounds exhibited good cell uptake compared with their parent compounds and confocal fluorescence microscopy revealed all dyes explored to be nuclear excluding, localizing predominantly within the lipophilic organelles; the endoplasmic reticulum and mitochondria. Cytotoxicity studies revealed that these BODIPY derivatives are modestly cytotoxic at concentrations exceeding 10 μM where they induce apoptosis and necrosis. Although the quantum yield of emission of the visible emitting fluorophore was over an order of magnitude greater than the Mega‐Stokes shifted probe, the latter showed considerably reduced tendency to self quench and less interference from autofluorescence. The near‐infrared probe also showed good penetrability and staining in live tissue samples. In the latter case similar tendency to exclude the nucleus and to localize in the mitochondria and endoplasmic reticulum was observed as in live cells. This to our knowledge is the first demonstration of such a Mega‐Stokes BODIPY probe applied to cell and tissue imaging.     

Low-threshold field emission from carbon nano-clusters

Detonation carbon materials (DCM) composed of non-equilibrium nano-structures show the low-threshold field emission (LTFE). These materials have forward-looking application especially due to high reproducibility of the LTFE-phenomenon on a surface of emitter, where the emitting centers are homogeneously distributed. In this paper we link the effect of LTFE to the nature of the corresponding wave functions based on the experiment results obtained for DCM by the field effect on electrolytes. As we had shown before DCM had been described by an ultra-relativistic dispersion function with extremely small effective mass of electrons and the size-quantization effect had been observed in DCM at even room temperature.Our results based on emission and electrolyte technics of the field-effect measurements in DCM along with modern observations of the field emission in strong electric fields allowed to propose a new resonance transmission model for LTFE-phenomenon, which is alternative to most widely discussed models based on the field-enhancing factors or barrier-lowering mechanisms.     

Filter cubes with built-in ultrabright light-emitting diodes as exchangeable excitation light sources in fluorescence microscopy

The use of ultrabright light‐emitting diodes as a potential substitute for conventional excitation light sources in fluorescence microscopy is demonstrated. We integrated ultrabright light‐emitting diodes in the filter block of a conventional fluorescence microscope together with a collimating Fresnel lens, a holographic diffuser and emission filters. This setup enabled convenient changes between different excitation light sources and resulted in high excitation efficiencies. Quantitative comparison of image intensities of test samples revealed that light‐emitting diodes yielded intensities in the range of a mercury arc lamp depending on the wavelength. The use of ultrabright light‐emitting diodes also enabled luminescence lifetime imaging without the need for image intensification.