Web动画的演变

不知什么时候,Web开始变得生动活泼了,Web页面中出现了会眨的眼睛、滚动的信息、流动的光线以及飞动的邮件。猛然间,广告、图标、图表开始跳舞和闪烁,比某人的大声呼喊更能引起你的注意。动画已成为不可缺少的Web页面设计工具,它的意义在于动画能更好地表达思想和概念,因而更容易被人接受。     

“工”形结构在天线耦合中的应用研究

本文分析了天线间耦合度的计算方法,探索了＂工＂形耦合元件减少天线间耦合的原理,并使用FEKO进行仿真。利用本文介绍的去耦方法,在300MHz隔离度提高了9dB,同时在300～500MHz范围内隔离效果都达到5dB以上,有效拓宽了天线的工作频带。     

调节阀未能实现自动控制状况之解析

分析了目前淀粉生产中浸泡罐温度控制系统,通过对DCS实现自动控制方式的解析,阐述了温度调节阀未能实现理想自动控制的原因并提出了解决的方法。表达了工业自动控制中合理的选择阀门的重要性。     

广电5G市场营销策略与实践研究

以广电发展5G移动通信业务为题，分析广电作为5G行业新进角色的现状及发展5G对广电的战略意义。结合不同市场开展5G业务的实际情况，运用市场细分、目标市场选择和市场定位理论提出广电5G业务的市场营销战略，并从产品、价格、渠道、促销等4个维度提出广电开展5G的市场营销的组合策略。     

用气室法研究分子反应动力学的新进展

介绍了研究分子反应动力学的两大主要实验方法之一的气室法、在研究有热原子参与的反应所取得的新进展，讲述了此方法“新用”的理论依据及相应的实验条件，至此，可以获得对分子反应动力学更精细的信息，例如，态－态分辨的微分反应截面，并对两大方法进行了“现代”对比。还对两方法的发展前景作了适度的分析。     

智能多用电源插座(联动电源插座)

随着时代的发展，现代家用电器品种繁多，功能齐全。例如：家庭影院系统必须由影碟机，大屏幕彩电，功放等组成，使用时只能逐个打开电源，用完后还得进个关闭电源，容易员关某个电器电源，造成能源浪费和产生不安全因素，并且使用复杂。本电源插座就是针对现代多电器联动使用的要求而设计的。例如：开关电视机时就不必同时去开关电视天线放大器的电源，或现代家庭影院VCD功放等电器的电源。尤其是电脑办公系统的使用，由于现代电脑一般均采用＊T互电源结构，所以关机时，其显示器仍处于丁作状态而不被人们所注意，造成显示器寿命大减，同…     

THE CATALYTIC EFFECTS OF OXYGEN AND AMINES IN THE REDOX-INITIATED DIMERIZATION OF N-VINYLCARBAZOLE*

The redox reaction between N-vinylcarbazole (NVC) and various oxidants including Ce(Ⅳ), Fe(Ⅲ)and benzoylperoxide in methanol proceeds via the initial formation of the NVC N-cation radical which in turn leads to the formation of the NVC cyclic dimer, trans-1,2-dicarbazylcyclobutane. Molecular oxygen and a few arylamines are able to accelerate the rate of the formation and increase the yield of the dimer. The mechanism of this process and the functions of oxygen and arylamines are presented as follows: The participation of molecular oxygen is to facilitate the dissociation of the resulting reduced metal ion and the NVC N-cation radical ion pair or charge transfer complex, thereby releasing the free NVC N-cation radical and increase the rate of the formation and yield of the dimer. The arylamine in this reaction between NVC and oxidants can be viewed as electron transfer agent between NVC and the oxidant. Because the amines are present in small amount relative to the oxidants and can be regenerated in pr     

平台级卡尔曼滤波空间配准算法

配准是实现多雷达系统多目标跟踪的一个重要前提。在对现有几种配准方法进行分析与比较的基础上,提出一种基于卡尔曼滤波估计平台级系统偏移的配准算法。最后,对以上算法作了大量的计算机仿真,仿真结果证明了提出算法的有效性。     

Near-field lithography on the azobenzene polymer liquid crystal films

In this article, we reported near-field research on azobenzene polymer liquid crystal films using scanning near-field optical microscopy (SNOM). Optical writing and subsequently topographic reading of the patterns with subwavelength resolution were carried out in our experiments. Nanometer scale dots and lines were successfully fabricated on the films and the smallest dot diameter is about 120 nm. The width of the line fabricated is about 250 nm. This method is also a choice for nanolithography. The mechanism of the surface deformation on the polymer films was briefly analyzed from the viewpoint of gradient force in the optical near field. The intensity distribution of the electric field near the tip aperture was numerically simulated using finite-difference time-domain (FDTD) method and the numerical simulation results were consistent with the experimental results.