浅析荆州电视台数字播控

本文主要从信号流程、核心系统、辅助系统三方面介绍荆州电视台数字播控系统的设计,包括总控和分控的信号流程设计、视频服务器、二级存储、数据库服务器、迁移服务器、上载工作站、串编工作站、播出工作站、技审工作站、数据导入导出系统、GPS时钟系统、同步系统、电源系统、空调系统的选型与设计。     

同步系统在数字播出中的应用

包头电视台以Magistream3000视频服务器为核心,配备各类型相关的工作站、服务器,配合播出周边设备如切换台、矩阵等,构成电视台完整的总分控播出系统,完成电视台节目的播出。在这样一个庞大的系统中,确保这些设备"同步"是设备间协同工作的必要条件。同步系统是整个播控系统正常运行的基础,至关重要。一旦失步,会出现图像滚动、无法叠加键信     

简述贵州电视台硬盘播出系统

以贵州电视数字化改造工程为例，文章就视音频系统，工作站软件系统，服务器系统，监测系统，同步系统，时钟系统和电源系统等七大主要系统的分类和功能做以介绍，突出了该改造工程确保安全播出的设计特点。     

新一代存储播出系统——数码视讯DiMemCast

存储播出系统是数字电视播出系统的主体,可实现NVOD、EPG等多种增值业务。数码视讯DiMemCast DVB存储播出系统由共享素材存储、光存储阵列等多级存储系统及DVB视频服务器系统等部分组成,其中视频服务器系统包括TS流采编工作站、编审工作站、资源管理服务器、播控工作站、主播出服务器等,支持从节目     

阳江台非线性编辑网络系统的升级改造

叙述了以视频服务器、有卡工作站为中心构建的非线性网络编辑系统的特点,以及作者使用中的实践.该系统着重考虑了视频服务器、有卡工作站选型、系统可靠性、可升级性等问题.     

阳江台非线性编辑网络系统的升级改造数据的变换和量化

叙述了以视频服务器、有卡工作站为中心构建的非法性网络编辑系统的特点，以及作者使用中的实践。该系统着重考虑了视频服务器、有卡工作站选型、系统可靠性、可升级性等问题。     

因特网上的媒体流传输──媒体服务器

本文介绍了媒体流传输系统的组成、客户工作站、媒体服务器以及媒体服务器的网络连接。     

研以致用为客户 高瞻远瞩创未来：IBM RS／6000工作站服务器应用及发展

概 述 在网络计算时代的网络计算,主要特征是采用工作站/服务器方式实现协同计算。这不仅是因为工作站/服务器是当今最流行的计算体系,最优地使用了所有计算资源,还由于计算环境中的每个成员,包括工作站、服务器、网络操作系统及应用系统等,能够处理各自最适应的工作,使整个系统在信息获取、传输、共享及使用方面达到最优最完美的境界。特别是近几年来,In-ternet和WWW(World WideWeb)技术的飞速发展,为工作站/服务器大举进军办公室自动化和商用事务处理等领域,开创了十分美     

因特网上的媒体流传输——媒体服务器

本介绍了媒体流传输系统的组成、客户工作站、媒体服务器以及媒体服务器的网络连接。     

关于NT与Novell网络互联的解决方案

安徽人民广播电台音频工作站系统建于1996年,它是建立在计算机局域网基础上的多媒体网络系统,以客户机／服务器为工作模式,星形拓扑结构的以太网(Ethernet)。该系统中的数据库服务器和音频文件服务器使用Novell netware4．10网络操作系统,各工作站安装Netware DOS请求程序与服务器     

Resolution Enhancement Technology:Integrated Process Solutions using OPC

DUV lithography, using the 248 nm wavelength, is a viable manufacturing option for devices with features at 130 nm and less. Given the low kl value of the lithography, integrated process development is a necessary method for achieving acceptable process latitude. The application of assist features for rule based OPC requires the simultaneous optimization of the mask, illumination optics and the resist.Described in this paper are the details involved in optimizing each of these aspects for line and space imaging.A reference pitch is first chosen to determine how the optics will be set. The ideal sigma setting is determined by a simple geometrically derived expression. The inner and outer machine settings are determined, in turn,with the simulation of a figure of merit. The maximum value of the response surface of this FOM occurs at the optimal sigma settings. Experimental confirmation of this is shown in the paper.Assist features are used to modify the aerial image of the more isolated images on the mask. The effect that the diffraction of the scattering bars (SBs) has on the image intensity distribution is explained. Rules for determining the size and placement of SBs are also given.Resist is optimized for use with off-axis illumination and assist features. A general explanation of the material' s effect is discussed along with the affect on the through-pitch bias. The paper culminates with the showing of the lithographic results from the fully optimized system.     

Cost-effective test solutions for smart card and other integrated flash applications

From its emergence in the late 1980s as a lower cost alternative to early EEPROM technologies, flash memory has evolved to higher densities and speedsand rapidly growing acceptance in mobile applications.In the process, flash memory devices have placed increased test requirements on manufacturers. Today, as flash device test grows in importance in China, manufacturers face growing pressure for reduced cost-oftest, increased throughput and greater return on investment for test equipment. At the same time, the move to integrated flash packages for contactless smart card applications adds a significant further challenge to manufacturers seeking rapid, low-cost test.     

An improved parallel thinning algorithm with two subiterations

The parallel thinning algorithm with two subiterations is improved in this paper. By analyzing the notions of connected components and passes, a conclusion is drawn that the number of passes and the number of eight-connected components are equal. Then the expression of the number of eight-connected components is obtained which replaces the old one in the algorithm. And a reserving condition is proposed by experiments, which alleviates the excess deletion where a diagonal line and a beeline intersect. The experimental results demonstrate that the thinned curve is almost located in the middle of the original curve connectivelv with single pixel width and the processing speed is high.     

Theoretical analysis of the relationship between the Brillouin gain coefficient and the strain in the optical-fiber sensors

The relation between the power of the Brillouin signal and the strain is one of the bases of the distributed fiber sensors of temperature and strain. The coefficient of the Bfillouin gain can be changed by the temperature and the strain that will affect the power of the Brillouin scattering. The relation between the change of the Brillouin gain coefficient and the strain is thought to be linear by many researchers. However, it is not always linear based on the theoretical analysis and numerical simulation. Therefore, errors will be caused if the relation between the change of the Brillouin gain coefficient and the strain is regarded as to be linear approximately for measuring the temperature and the strain. For this reason, the influence of the parameters on the Brillouin gain coefficient is proposed through theoretical analysis and numerical simulation.     

Novel fiber-optical interferometer with miniaturized probe for in-hole measurements

Today, micro-system technology and the development of new MEMS （Micro-Electro-Mechanical Systems） are emerging rapidly. In order for this development to become a success in the long run, measurement systems have to ensure product quality. Most often, MEMS have to be tested by means of functionality or destructive tests. One reason for this is that there are no suitable systems or sensing probes available which can be used for the measurement of quasi inaccessible features like small holes or cavities. We present a measurement system that could be used for these kinds of measurements. The system combines a fiber optical, miniaturized sensing probe with low-coherence interferometry, so that absolute distance measurements with nanometer accuracy are possible.     

Study of waveguide coupling efficiency in hybrid silicon lasers

This paper presents a new method to increase the waveguide coupling efficiency in hybrid silicon lasers. We find that the propagation constant of the InGaAsP emitting layer can be equal to that of the Si resonant layer through improving the design size of the InP waveguide. The coupling power achieves 42% of the total power in the hybrid lasers when the thickness of the bonding layer is 100 nm. Our result is very close to 50% of the total power reported by Intel when the thickness of the thin bonding layer is less than 5 nm. Therefore, our invariable coupling power technique is simpler than Intel＇s.     

Curved crystal spectrometer for the measurement of X-ray lines from laser-produced plasmas

In order to diagnose the laser-produced plasmas, a focusing curved crystal spectrometer has been developed for measuring the X-ray lines radiated from a laser-produced plasmas. The design is based on the fact that the ray emitted from a source located at one focus of an ellipse will converge on the other focus by the reflection of the elliptical surface. The focal length and the eccentricity of the ellipse are 1350 mm and 0.9586, respectively. The spectrometer can be used to measure the X- ray lines in the wavelength range of 0.2-0.37 nm, and a LiF crystal （200） （2d = 0.4027 nm） is used as dispersive element covering Bragg angle from 30° to 67.5°. The spectrometer was tested on Shengnang- Ⅱ which can deliver laser energy of 60-80 J/pulse and the laser wavelength is 0.35 μm. Photographs of spectra including the 1 s2p ^1P1-1s^2 ^1S0 resonance line（w）, the 1s2p ^3P2-1s^2 1S0 magnetic quadrupole line（x）, the 1s2p ^3P1-1 s^2 ^1S0 intercombination lines（y）, the 1 s2p ^3S~1-1 s^2 ^1S0 forbidden line（z） in helium-like Ti Ⅹ Ⅺ and the 1 s2s2p ^2P3/2-1 s622s ^2S1/2 line（q） in lithium-like Ti Ⅹ Ⅹhave been recorded with a X-ray CCD camera. The experimental result shows that the wavelength resolution（λ/△ 2） is above 1000 and the elliptical crystal spectrometer is suitable for X-ray spectroscopy.     

Preparation and Characterization of TaN ALD Precursors

High purity organic-tantalum precursors for thin film ALD TaN were synthesized and characterized.Vapor pressure and thermal stability of these precursors were studied.From the vapor pressure analysis,it was found that TBTEMT has a higher vapor pressure than any other published liquid TaN precursor,including TBTDET,TAITMATA,and IPTDET.Thermal stability of the alkyl groups on the precursors was investigated using a 1H NMR technique.The results indicated that the tertbutylimino group is the most stable group on TBTDET and TBTEMT as compared to the dialkylamido groups.Thermal stability of TaN precursors decreased in the following order:TBTDET ＞ PDMAT ＞ TBTEMT.In conclusion,precursor vapor pressure and thermal stability were tuned by making slight variations in the ligand sphere around the metal center.     

Electronic Structure of Semiconductor Nanocrystals

This paper reviews our recent development of the use of the large-scale pseudopotential method to calculate the electronic structure of semiconductor nanocrystals, such as quantum dots and wires, which often contain tens of thousands of atoms. The calculated size-dependent exciton energies and absorption spectra of quantum dots and wires are in good agreement with experiments. We show that the electronic structure of a nanocrystal can be tuned not only by its size,but also by its shape. Finally,we show that defect properties in quantum dots can be significantly different from those in bulk semiconductors.     

A rigorous proof of MIMO channel capacity’s increase with antenna number

It is well known that adding more antennas at the transmitter or at the receiver may offer larger channel capacity in the multiple-input multiple-output（MIMO） communication systems. In this letter, a simple proof is presented for the fact that the channel capacity increases with an increase in the number of receiving antennas. The proof is based on the famous capacity formula of Foschini and Gans with matrix theory.