一种复杂约束下的采购评审专家自动抽取算法

采购评审专家的自动化抽取是采购信息化的重要组成部分。目前就评审专家的计算机辅助抽取提出了不少算法,但在自动化抽取方面的研究和讨论仍然较少。故提出一种面向复杂约束条件的采购评审专家自动化抽取算法。该算法以多项目并行抽取为业务前提,通过重构抽取流程,设立不同抽取任务间的通信机制,优化规则模型,较好地解决了复杂规则下评审专家的自动化抽取问题。该算法已经在中国银联的采购信息化平台上成功实现。     

专家信息管理系统设计与实现

通过完善、合理的专家库管理系统的建设,实现各类项目、课题等快速地抽选合适的专家,从而大大提高项目评审、项目论证、科技成果评价等评定工作的效率。专家信息管理系统架构基于java,在Windows系统环境下运行,实现各级各类专家需求的管理和抽取,可方便从专家库中指定或随机地选取需求指定数量的专家,使专家抽取流程和原则科学化、公平化、公正化。系统已通过程序实现,应用到山西省科技服务平台系统。     

移动通信行业基于采购风险防控的评审标准化研究

评审环节是采购活动中的关键环节,本课题研究内容为评审全过程标准化.为使评审过程中涉及到的评委、采购经理、招标代理履行自身相关职责,制定《采购工作流程操作手册》;为规范开评标过程,编制标准化操作流程和标准化现场文件;为指导评标委员会正确启动澄清程序,收集整理评标可澄清情形及内容;为便于与投标人有利害关系的人员主动申请回避,列明开评标时相关人员需回避的情形;为严控专家抽取流程,保证评委信息不被泄露,制定ES系统自动抽取方案;为做好评审过程保密和监督工作,完成评标室建设并完善评审现场配套设施.     

北京市召开通信建设行政许可专家评审座谈会

为更好地贯彻落实信息产业部“通信建设企业资质评审程序”规定的专家评审制度，提高评审专家的工作能力和政策掌握水平。目前，北京市通信管理局电信工程设计施工管理处组织召开了通信建设企业资质评审专家座谈会。参加座谈会的专家有来自北京市的五大运营企业、通信建设、设计、施工、监理等13个单位的20余人．     

《云南省无线电频谱“十二五”规划》通过专家评审

本刊讯近日,由云南省无线电管理办公室编制的《云南省无线电频谱＂十二五＂规划》通过了专家评审。评审专家组由工业和信息化部无线电管理局、云南省经济研究院、云南省经济信息中心、昆明理工大学等单位的5名专家组成。工信部无管局频率规划处处长李恒帅担任专家组组长。     

煤矿安全监察局专家抽取系统分析

随着Internet的迅速发展,计算机应用范围也越来越广泛,随机抽取系统成为很多政府、公司必备的重要的管理软件之一。抽取工作是否公平、公正影响着交易主体的自身利益。文章论述的专家抽取系统能够对专家管理、项目管理、专家抽取等方面的工作进行信息化、智能化管理,并且抽取及通知的过程能够由管理员和监察员通过系统快速、有效地完成。     

中广协会第一期有线广播电视工程企业资质证书颁证仪式在杭州举行

中国广播电视协会按照国家政策,经请示总局．与各地沟通．于2009年初开始有线电视工程企业资质评审工作（由有线电视工作委员会承办）．制定了“评审办法”等系列文件．经过企业自愿申请．严格的初审、实地核查、工程质量检测、复审、专家评审、领导小组审定等程序完成了对第一期申报企业的评审工作。第一期评审的对象企业主要是上海、福建的有线电视工程企业,上海有线电视协会对评审工作给予了大力支持。     

基于Web的高校项目评审系统的设计与实现

为解决高校项目评审的网络化问题,在考虑数字化校园建设要求和评审结果再利用基础上,提出了基于Web的高校项目评审系统的功能要求和体系结构,设计了后台数据库和功能模块。采用公共数据采集技术和专家反评估方法,实现了基于数字化校园综合管理平台的公共数据共享和基于评审历史数据的专家反评估,解决了项目评审系统与其他业务系统之间集成问题和评审专家反评估问题。应用结果表明了系统的实用性、兼容性和可扩展性。     

基于WEB方式的会议评审系统设计

主要阐述了从设计到实现基于ASP.NET+SQL Server的专家评审会议系统,系统主要实现集中、快速的对大量科技项目进行网络化申报、评审管理;项目在线提交后,对评审任务进行分配、专家会议评审,实现公平公正、合理、操作性强的评审,有效解决项目在分配和管理上的一些难题,对现代化协调办公具有一定的参考意义。     

科技项目评审专家推荐系统模型

针对科技项目评审专家的准确遴选问题,提出一种混合推荐系统模型。该模型在文本信息分词的基础上,运用TF—IDF算法进行关键词的提取、权重计算及筛选,分别建立科技项目和评审专家的向量空间模型,并基于专家信息建立专家评分数学模型。最后提出一种内容推荐、协作过滤推荐及专家评分加权因子相融合的混合推荐算法。实验结果表明,该推荐模型能有效地进行评审专家推荐。     

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.     

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.     

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.     

Critical Stage Rule-Based Real Time Dispatch（RTD）System in Highly-Mixed-Products （HMP） FAB

An improving utilization and efficiency of critical equipments in semiconductor wafer fabrication facilities are concerned. Semiconductor manufacturing FAB is one of the most complicated and cost sensitive environments. A good dispatching tool will make big difference in equipment utilization and FAB output as a whole. The equipment in this paper is In-Line DUV Scanner. There are many factors impacting utilization and output on this equipment group. In HMP environment one of the issues is changing of reticule in this area and idle counts due to load unbalance between equipments. Here we'll introduce a rule-based RTD system which aiming at decreasing the number of recipe change and idle counts among a group of scanner equipment in a high-mixed-products FAB.     

GaAsSb/InAlAs PA DHBTs Grown by Production MBE

The epi material growth of GaAsSb based DHBTs with InAlAs emitters are investigated using a 4 × 100mm multi-wafer production Riber 49 MBE reactor fully equipped with real-time in-situ sensors including an absorption band edge spectroscope and an optical-based flux monitor. The state-of-the-art hole mobilities are obtained from 100nm thick carbon-doped GaAsSb. A Sb composition variation of less than ± 0.1 atomic percent across a 4 × 100mm platen configuration has been achieved. The large area InAlAs/GaAsSb/InP DHBT device demonstrates excellent DC characteristics,such as BVCEO＞6V and a DC current gain of 45 at 1kA/cm2 for an emitter size of 50μm × 50μm. The devices have a 40nm thick GaAsSb base with p-doping of 4. 5 × 1019cm-3 . Devices with an emitter size of 4μm × 30μm have a current gain variation less than 2% across the fully processed 100mm wafer. ft and fmax are over 50GHz,with a power efficiency of 50% ,which are comparable to standard power GaAs HBT results. These results demonstrate the potential application of GaAsSb/InP DHBT for power amplifiers and the feasibility of multi-wafer MBE for mass production of GaAsSb-based HBTs.     

Noise character analysis and the restraint of self-pulsation laser diodes

We calculate the Langevin noise sources of self-pulsation laser diodes, analyze the effects of active region noise and saturable-absorption region noise on the power fluctuation as well as period fluctuation, and propose a novel method to restrain the noise effects. A visible SIMULINK model is established to simulate the system, The results indicate that the effects of noise in absorption region can be ignored; that with the increase of DC injecting current, the noise effects enhance power jitter, and nevertheless, the period jitter is decreased; and that with external sinusoidal current modulating the self-pulsation laser diode, the noise-induced power jitter and period jitter can be suppressed greatly. This work is valuable for clock recovery in all-optical network.     

High-quality single-crystal CdSe nanoribbons and their optical properties

Large-scale synthesis of single-crystal CdSe nanoribbons is achieved by a modified thermal evaporation method, in which two-step-thermal-evaporation is used to control CdSe sources＇ evaporation. The synthesized CdSe nanoribbons are usually several micrometers in width, 50 nm in thickness, and tens to several hundred micrometers in length. Studies have shown that high-quality CdSe nanoribbons with regular shapes can be obtained by this method. Room-temperature photolumines-cence indicates that the lasing emission at 710 nm has been observed under optical pumping （266 nm） at power densities of 25-153 kW/cm^2. The full width half maximum （FWHM） of the lasing mode is 0.67 nm     

Propagation of hermite-cosh-gaussian beams passing through ABCD optical system with an annular aperture

By using the expansion of the aperture function into a finte sum of complex Gaussian functions, the corresponding analytical expressions of Hermite-cosh-Gaussian beams passing through annular apertured paraxially and symmetrically optical systems written in terms of ABCD matrix were derived, and they could reduce to the cases with squared aperture. In a similar way, the corresponding analytical expressions of cosh-Gaussian beams through annular apertured ABCD matrix were also given. The method could save more calculation time than that by using the diffraction integral formula directly.     

Influence of polarization extinction ratio on distributed polarization coupling detection

Distributed polarization coupling in polarization-maintaining fibers can be detected by using a white light Michelson interferometer. This technique usually requires that only one polarization mode is excited. However, in practical measurement, the injection polarization direction could not be exactly aligned to one of the principal axes of the PMF, so the influence of the polarization extinction ratio should be considered. Based on the polarization coupling theory, the influence of the incident polarization extinction on the measurement result is evaluated and analyzed, and a method for distributed polarization coupling detection is developed when both two orthogonal eigenmodes are excited.     

Call for Papers

正Communications—VLSI Researches and industries of telecommunications have been growing rapidly in the last 20 years and will keep their high growing pace in the next decade.The involved researches and developments cover mobile communications,highway and last-mile broadband communication,domain specific communications,and emerging D2D M2M communications.Radio communication steps into its