物联网关键技术与发展

物联网被称为继计算机、互联网之后世界信息产业第三次浪潮。文章首先解析物联网的基本概念和特征、物联网体系架构,然后归纳物联网涉及的关键技术,最后总结物联网标准化发展现状、问题,并提出物联网标准化发展建议。     

4-component 2-D CFDFD method in analysis of lossy circular waveguide with fractal rough surface

In this paper, equivalent surface impedance boundary condition (ESIBC), which takes fractal parameters (D, G) into SIBC, is implemented in the 4-component 2-D compact finite difference frequency domain (2-D CFDFD) method to an- alyze the propagation characteristics of lossy circular waveguide with fractal rough surface based on Weierstrass-Mandelbrot (W-M) function. Fractal parameters’ effects on attenuation constant are presented in the 3 mm lossy circular waveguide, and the attenuation constants of the fi...     

CORDIC algorithm based on FPGA

It is an important problem that we implement floating point trigonometric functions of high precision with suitable hardware cost for high performance in digit image processing.The coordinate rotational digital computer (CORDIC) arithmetic to is used to solve the above problem in this paper.In order to increase the speed of operation,it chooses the pipeline architecture.The results are disposed by IEEE-754 standard.The CORDIC architecture is modeled by using the verilog HDL and verified with MATLAB program ...     

知识可视化视觉表征的内容构建方法

知识可视化中更多探讨视觉表征具有可以表达什么知识内容的功能,却没有根据知识传播的属性,探讨视觉表征如何表达知识内容的方法。为此,文章考察了视觉表征与知识内容的关系特征,并根据信息科学中知识的属性与分类,探讨视觉表征内容的建构方法。     

泛在学习中自适应学习管理系统设计

泛在学习的目的更加倾向于培养学生的兴趣,根据学生的兴趣进行自愿的自主探究的学习。根据泛在学习的特点,分析了现有的自适应模型同时结合实际情况,提出了泛在学习自适应模块的设计方案。该设计方案主要是体现个性化的学习,根据不同的学习者的学习兴趣,系统会提供相应的学习资料,满足学习者不同的学习要求。     

基于纳米金与牛血清白蛋白-二氧化钛复合物固定甲胎蛋白免疫传感器的研究

采用纳米金和牛血清白蛋白（BSA）-二氧化钛（TiO2）固载抗体制得灵敏度较高的甲胎蛋白（AFP）免疫传感器,采用了循环伏安法对传感器的制备过程进行表征.实验结果表明,该传感器对AFP有很好的电流响应,其线性范围为0.01~80.0ng/mL,检出限为0.003ng/mL.该实验方法具有电极制备简单,操作简便,灵敏度高等特点,实现了对AFP的定量分析.     

表象训练在“二十四式”教学中的应用研究

针对武术项目教学三多的问题,以人体生理学运动技能形成的过程为切入点,在传统的二十四式教学方法的基础上采用对比实验法、数理统计法、文献资料等研究方法,对表象训练法的教学效果进行研究。实验证明这种教学方法能激发学生的学习主观想象力,达到更好的教学效果。     

肖邦《降E大调夜曲》的作品设计

夜曲是肖邦（Fryderyk Franciszek Chopin,1810-1849）创作中最富于浪漫主义气质的体裁。文章选例肖邦的《降E大调夜曲》,从夜曲的体裁和作品本体两方面对这首广为流传的夜曲在作品的设计上进行了简要的分析,以期揭示出肖邦夜曲创作的艺术特点。     

Ni（2＋）掺杂对TiO2薄膜光催化性能和亲水性的影响

采用sol-gel法制备了锐钛矿型TiO2薄膜与Ni2＋掺杂TiO2薄膜。通过XRD、AFM表征了薄膜的晶相和形貌特征,用接触角测定仪测定接触角以评估薄膜的亲水性,以甲基橙作为有机污染物研究了薄膜的光催化性能。实验结果发现：少量Ni2＋掺杂提高了TiO2薄膜的亲水性和光致亲水性。但Ni2＋掺杂却使TiO2光催化性能有所降低。结果表明,TiO2薄膜表面的光致亲水性与光催化特性无正相关性。     

Vicarious learning from dialogue and discourse

This study examined learning in the domain of sentence parsing and syntax treediagram construction. The aim of the study was to assess whether subjects could learn vicariously from recordings of interactions between a previous student and a tutor.Four intervention conditions and a control condition were compared. Subjects in a dialogue group (DL) read printed tutorial notes and subsequently vicariously viewed dynamic (animated) recordings of tree diagrams being constructed by a previous student in the presence of a tutor.The discourse (DI) condition was similar except that subjects viewed recordings of tree diagrams being constructed by a tutor who concurrently verbalised instructional discourse.In a third condition (DO), subjects viewed tree-diagram construction animation clips which were not annotated with either dialogue or discourse. In a linear text (LT) condition, subjects were given only printed tutorial notes. A control (CO) condition involved pre and post testing without any intervention.Results indicated that the dialogue condition was as effective as the discourse condition. This provides support for contention that re-usable dialogue is a useful resource for the vicarious learner. Another finding was that un-annotated animated diagrams were surprisingly effective. Several reasons for their effectiveness are suggested from the literature on instructional animations.