利用Proxy开发网络计费系统

本文讨论了利用代理服务器实现计费系统的设计方法。在本方案中采用客户机／服务器（C／S）结构,通过对日志文件中的数据统计,对内部网用户实施计费管理。实践表明,在企业网中使用这种方案可以更高效、灵活、经济地实现计费管理。     

无锡广电有线宽带计费系统应用实例

通过宽带计费系统的实施,无锡广电实现了用户认证上网、用户访问日志记录和灵活的计费方式等功能,对用户进行有效管理并消除了缴费纠纷和资费流失等问题。     

新品发布

计费子系统中兴查询号181中兴ManaMaster决策大师是专门用于经营决策的计费子系统,将计费数据库中的数据进行二次提炼,并加工成可供电信企业参考的业务数据。通过分析用户群甚至是用户行为,得出用户的电信消费行为走向,为电信经营方向及时作出决断。ManaMaster决策大师由四大模块构成,包括数据挖掘、自动评价系统、自由报表和信息发布模块。中兴通讯通过与其计费系统中自行开发的数据库中间件（DBFREE）相结合,实现了数据库的无关性,可以采用Informix、Oracle、Sebase大型关系数据库,也可根据用户要求选用数据库产品;由于采…     

决策好参谋——ManaMaster决策大师TM

中兴通讯在开发本地网计费账务系统过程中,特地考虑了以往计费系统计费功能全面但经营决策不力的情况,参考了国外各大系统集成厂商计费系统中对经营决策的支持,对照国家电总的有关规定及中国的实际情况,开发出了专门针对经营决策的计费子系统--ManaMaster决策大师TM.ManaMaster决策大师TM针对计费数据库中的数据进行二次提炼,加工形成可供电信企业参考的业务数据,分析用户群乃至用户的行为,得出用户的电信消费行为走向,为电信经营的方向及时作出决断,使电信经营策略能够适应用户需求与自身经营发展需求,最大限度利用现有资源挖潜增效.     

CSG Kenan/BP计费平台和CSG数据采集系统被北京电信采用

2004年2月3日,CSGSystems和IBM宣布,北京电信已采用CSGKenan/BP计费平台和CSG数据采集系统为用户提供语音和数据处理服务。IBM和CSG在不到18个星期内即完成了计费平台实施计划的第一阶段工作。IBM和CSGSystems协手共同在IBM的AIX平台上实施Kenan/BP和CSG数据采集系统。CSG Kenan/BP计费平台和CSG数据采集系统被北京电信采用@刘扬     

基于Java技术的电信运营计费系统

本文介绍的系统，是由于某电信运营商新增一项OpenLab（开放实验室）出租业务而开发，即该电信运营商提供基于Unix平台的实室验环境，选择使用这种业务的用户能够远程登录到实验室中做基于这个实验室环境的一些工作和实验。运营商希望借助先进的计算机技术对访问实验室的用户进行管理和计费，由此实现对此项业务运营的支持与管理。     

电信"97工程"与实时账务系统用户资料自动转换接口的实现

国内电信“97工程”的实施，计费账务系统的独立实现，使得两个系统之间的通信成为必要。本文中的接口系统实现了通信功能，提供了自动化处理，错误检查，日志查询等功能，为信息的管理提供了方便，并保证了数据的安全性。     

现代电信网的计费方法及计费系统

现代电信网的计费方法及计费系统＠黄河现代电信网的计费方法及计费系统黄河作为程控交换机的一个重要的组成部分，计费系统往往与电信主管部门和电话用户的经济利益紧密相连。因此，电信主管部门需要根据实际情况采用几种计费方法，以便在用户使用业务时合理地向用户收取费用。...     

惠普助推LTE用户管理与个性化服务

LTE时代,电信运营商将面临更加严峻的用户数据管理与个性化计费问题,对此惠普LTE解决方案与服务将有效帮助运营商实现LTE无缝迁移。对电信运营商而言,用户数据的运营与管理愈加重要。为满足这一需求,近日惠普适时推出了系列解决方案,以帮助电信运营商在长期演进(LTE)网络发展过程中为用户提供无缝转换。此外,惠普还推出了用户、网络和应用政策管理方案,可帮助运营商制定差异化的策略和计费,为用户提供高度个性化     

PPPoE认证方式中用户"挂死"现象分析及解决策略

1引言近年来,随着宽带业务的蓬勃发展,宽带应用管理计费系统的建设已经成为电信运营商迫切的需求。笔者在参与运营商宽带应用管理计费系统建设过程中,发现普遍存在用户“挂死”现象,由于这个问题对于运营商宽带应用管理计费系统建设关系重大,因此笔者希望运营商加以重视。2PPPo     

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.