交互式媒体技术在下一代网络中的应用

两类重要的技术领域已经出现,它们正在改变着人们与信息的关系。其一是面向对象的多媒体编码格式;另一个则是由标记交换和IP交换发展而成的下一代运营商网络的核心技术－MPLS,它在业务质量保证、流量工程、虚拟专用网络等方面有着非常有效的应用。显然,这两类技术在颇大程度上是相辅相成的,所以,如何将此二者融合在一起,充分利用它们的优势并在现实中使用基于它们的系统是非常有现实意义的。因此,本文将探讨一个能够使两者汇合的应用系统。     

Determination of beryllium by electrothermal atomic absorption spectrometry using tungsten surfaces and zirconium modifier

Electrothermal atomization of beryllium from graphite and tungsten surfaces was compared with and without the use of various chemical modifiers. Tungsten proved to be the best substrate, giving the more sensitive integrated atomic absorption signals of beryllium. Tungsten platform atomization with zirconium as a chemical modifier was used for the determination of beryllium in several NIST SRM certified reference samples, with good agreement obtained between the results found and the certified values. The precision of the measurements (at 10 μg L⁻¹), the limit of detection (3σ), and the characteristic mass of beryllium were 2.50%, 0.009 μg L⁻¹ and 0.42 pg, respectively.     

多媒体硬件支撑技术进展一瞥

本文综述多媒体硬件支撑技术有代表性的若干新进展：ＭＰＥＧ音、视频解压缩ＩＣ的芯片级集成，突破微机总线和接口传输瓶颈，多媒体板级产品的系统集成和平台硬软件的总体优化，外存储器的高速大容量化。     

lambda, an integrated master-slice LSI CAD system

Since 100% routing is essential for master-slice LSI layout design, it is urgently required to establish an integrated CAD system, which significantly reduces the design time. It is almost impossible for even sophisticated automatic programs to accomplish 100% routing without using any man-machine interaction. The lambda system has been developed to achieve complete net connectivity in as short a design time as possible, where efficient automatic procedures are implemented as well as highly interactive functions. The automatic and interactive functions are completely integrated in the system by exploiting human intelligence and the computer's high speed processing.     

水声对抗器材对抗平台声纳效果评估方法

随着反潜平台反潜能力的不断提高,对抗平台声纳的水声对抗技术和装备也不断发展。结合潜艇对抗反潜平台声纳的特点,提出了水声对抗器材对抗平台声纳效果评估准则,并给出了仿真条件和仿真流程,对水声对抗器材对抗平台声纳效果评估方法研究有一定的参考价值。     

可变摆长的单摆运动的MATLAB仿真

文章对可变摆长的单摆运动进行了详细的理论分析和推导,并根据不同的摆长将运动分成八种情况。     

黑客攻击行为分析与网络安全管理平台的系统组成

介绍了黑客攻击的主要方式,提出了应急响应的对策,重点论述了入侵检测系统（IDS）和计算机取证技术,并对网络安全管理平台的构建和系统组成提出了自己的思路。     

A self‐calibrating led‐based solar test platform

A compact platform for testing solar cells is presented. The light source comprises a multi‐wavelength high‐power LED (light emitting diode) array allowing the homogenous illumination of small laboratory solar cell devices (substrate size 50 × 25 mm) within the 390–940 nm wavelength range. The spectrum can be synthesized by independent tuning of the 18 different wavelengths to mimic AM1.5G as well as various indoor lamp spectra. The intensity can be controlled with a 2¹⁴‐bit accuracy and intensities up to 3 suns are possible with an approximate AM1.5G spectral distribution. For several wavelengths intensities up to 10 suns is possible, and for a few wavelengths up to 30 suns can be reached. The setup is equipped with reference diodes and an optical fibre coupling enabling calibration, monitoring and control of the light impinging on the sample. Through a computer controlled interface, it is possible to perform all the commonly employed measurements on the solar cell at very high speed without moving the sample. In particular, the LED‐based illumination system provides an alternative to light‐biased incident photon‐to‐current efficiency measurement to be performed which we demonstrate. Both top and bottom contact is possible and the atmosphere can be controlled around the sample during measurements. The setup was developed for the field of polymer and organic solar cells with particular emphasis on enabling different laboratories to perform measurements in the same manner and obtain a common basis for comparing data. The use of the platform is demonstrated using a standard P3HT:PCBM polymer solar cell but is generally applicable to any solar cell technology with a spectral response in the 390–950 nm region. Copyright © 2010 John Wiley & Sons, Ltd.     

冲蚀磨损与冲蚀、空蚀交互磨损的对比研究

基于计算流体力学(computational fluid dynamics,CFD)方法,数值对比研究了在模拟水轮机工况中不同转速时,冲蚀与冲蚀、空蚀交互作用时,转盘表面的流场(压力场、流体浓度分布),然后在转盘式磨损装置上,进行了汽液固三相冲蚀与空蚀交互磨损试验.结果表明:对于冲蚀磨损来说,随着转速增加,压力增大,在冲蚀作用下加入空蚀磨损,压力增高,磨损加剧;而对于交互磨损来说,随着转速增加,转盘表面的空蚀磨损区域从空化孔附近开始沿着转盘旋转的反方向偏移,并且磨损程度加剧;数值计算的气泡较多且压力梯度较高区域和试验转盘磨损区域基本一致,数值计算结果和试验结果吻合得较好.     

基于物联网的智能化窨井管理系统的设计

通信管道承载着户外传输网络,是通信网络的生命管道。管道规模伴随着城市化进程快速成倍增长,但管道管理还处于传统的依赖人工专项梳理、专项盯防的模式。随着智慧城市建设的加速推进,采用“物理加锁+物联网管理平台”的创新管理方式,结合物联网技术和大数据技术,实现对流程、人员、设备的全方位管理。