绿色氧化剂高铁酸盐的制备与应用

综述了干法、湿法和电解法制备绿色氧化剂高铁酸盐的研究进展,介绍了高铁酸盐作为电池材料、选择性氧化剂和水处理剂等应用的发展动态和最新进展,并对今后的研究提出了设想。     

Trying to Include but Supporting Exclusion Instead? Constructing the Roma in Slovak Educational Policies

Based on a social constructivist theoretical framework, this research study examines how the design of proinclusive educational policies and the general public construct the Roma students and parents in Slovakia. For this purpose, data from two selected educational policies and five focus groups conducted in five regions in Slovakia were analyzed. The findings demonstrate that the Roma are constructed negatively as irresponsible dependents and deviants not valuing education and incapable of making wise decisions about their lives. These findings can be considered relevant for policy formulation processes because proinclusive policies may sabotage their own goals if negative social constructions of a certain societal group are embedded in them.     

Dielectric Properties of ZnTiO3 Microwave Ceramics Consolidated with MgTiO3

STABILIZED ZNTIO, WAS PREPARED BY DOPING MAGNESIUM OXIDE THROUGH TRADITIONAL SOLID-STATE REACTION. THE EXPERIMENTAL RESULTS INDICATE THAT ZINC TITANATE CRYSTALS DOPED WITH MAGNESIUM OXIDE GROW WELL AND THE DECOMPOSITION INTO ZN2TIO4 AND TIO2 IS RESTRAINED THROUGH TRADITIONAL SOLID STATE REACTION. BY ADJUSTING MOLAR RATIO OF MGO, BETTER PROPERTIES CAN BE OBTAINED. THE DIELECTRIC PROPERTIES OF THE CERAMICS DOPED WITH 30% MGO( MOLAR PERCENTAGE) SINTERED AT 1 060 ℃ ARE AS FOLLOWS:THE VALUE OF QUALITY FACTOR IS GREATER THAN 20 000(6. 5 GHZ), THE TEMPERATURE COEFFICIENT OF RESONANCE FREQUENCY IS ABOUT 2 × 10-6/℃, THE DIELECTRIC CONSTANT RANGES FROM 18 TO 22. BESIDES, IT IS PROVED THAT HEAT TREATMENT CAN OPTIMIZE MICROSTRUCTURE AND THE VALUE OF QUALITY FACTOR, WHICH INCREASES FROM 23 833.93 TO 47 584.00 AFTER 2 H OF HEAT TREATMENT AT 1 040 ℃.     

法国“有指导的学习实践活动”探析及启示

作为教育制度改革的一项重要举措,法国政府从1999年在高中二年级课程里加入了有指导的学习实践活动(TravauxPersonnelsEncadrés,TPE),它是法国开展“研究性学习”的过程中实施的一项特色课程。这一活动和教学计划紧密配合,为学生提供了自己完成一项“科研工作”的机会,以丰富他们的知识,提高他们的能力并改进他们的学习方法。     

"前见"断思--从海德格尔到伽达默尔

“前见”是诠释学中的一个重要概念，鉴于此，一切关于“前见”虐待式的理解与非难性的贬斥，都视为对诠释精神的悖离。因此，很有必要为“前见”溯源以还其根，为“前见”正名以匡其意，为“前见”澄明以创其新。     

用Mathematica绘制几何图形

介绍了Mathematica在几种几何图形绘制中的应用,提出了获得空间旋转曲面的参数方程的一般方法,并给出了用Mathematica绘制空间旋转曲面的实例的源代码.     

论杨万里对晚唐诗的接受

杨万里将晚唐诗作为摆脱江西诗风、疗救江西诗病的药方。为此，他有意无意的将晚唐诗加以理想化．将之提升到“《风》、《雅》之遗音”的高度。这种理想化反过来又直接影响了杨万里自己的诗歌创作。     

企业机房管理策略及方法

从加密机器CMOS、建立NT网、运用注册表工具，运用工具软件，使用磁盘保护卡及电子教室软件等方面，提出了企业机房管理的多种策略及方法。     

Intersections of two offset parametric surfaces based on topology analysis

INTRODUCTIONTheOSSI(OffsetSurface/SurfaceIntersection)problemisasub-problemofgeneralSSI.AlthoughtheOSSIproblemcanberesolvedbyapplyinggeneralSSIalgorithm,itiscomputationallyexpensiveandexhaustive.Inrecentdecades,effortshavebeenfocusedoncomputingSSIexactly,efficiently,androbustlyinageneralsetting(Abdel-MalekandYeh,1997;Changetal.,1994;BurkeandSabharwal,1996;Mullenheim,1991).Thesetechniquescanbeclassifiedmainlyintofivecategories:algebraic,latticeevaluation,marching(tracing)method,…     

Parallelism in open learning and working environments

One of the main shortcomings of multimedia in open learning environments is the use of monitors. The monitor as currently supplied with the personal computer originates from the world of television and video. Television equipment is extremely suitable for the transmission of one-way messages and also for the presentation of film, video and speakers ('talking heads'). It is also suitable for giving instruction and showing other educational programmes. But the monitor is built as a one-way message medium.
Pictures and images are presented but disappear as soon as other pictures are presented. Thus, a certain measure of short and long memory is required as well as the interpretation of the data and so it remains a linear medium. The organisation of the monitor display is a constant worry in open learning and working environments, because in practice it is continually changing.
This article analyses these shortcomings and describes some solutions according to the concepts and theories of Min, Koopal, Gritter, Struyker Boudier, Coleman, Miltenburg and Van Schaick Zillesen, developed over the last decade (Min, 1992).