深圳DDN网络的扩容与优化

深圳ＤＤＶ自开通后发展速度惊人,扩容工程面临许多问题。扩容方案确立后,按照网管结构优化、软件版本升级、节点机组网、时钟源、节点分流、传输测试、割接、网络优化等工作进程吩步骤完成,使得网络的结构、层次、布局更加合理,网络整体效能得以充分发挥。     

军事光纤通信发展对策研究

重点讨论对我国国防信息基础设施的体系结构发展有重大影响的热点技术,介绍了一个超级国防信息系统网络结构建议,以及它的网络功能和应用的军事意义     

Sexuality training for professional psychologists: A national survey of training directors of doctoral programs and predoctoral internships.

Addressing sexuality issues is an inherent part of being a professional psychologist. A survey of training directors revealed that, although about one half of the doctoral programs covered at least some sexuality topics within courses, 19% to 21% of programs did not offer any training with regard to sexual dysfunction, therapy with gay clients, and HIV-AIDS. Sexuality training was even less likely in predoctoral internships. Sexuality training was unrelated to size of the program but was a function of the number of faculty with relevant expertise. Psychologists with adequate knowledge and comfort regarding sexuality will be better able to serve clients and avoid ethical pitfalls. Suggestions for infusing sexuality training into the already-crowded curricula are offered. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

工程专业团队的管理

当今社会商业竞争激烈,讲求灵活和创新。现代企业因应时势需要,通常采取以团队为基础的工作小组的组织形式。工程专业机构主要由趋向自我领导和对自己工作表现严格要求的专业人员组成,因而指挥一控制模式不再是有效的管理工具。对于这些工程专业团队,我们需要发展新的思路对其进行管理,并加以激励。本文首先简述与职能部门结构相比,跨职能团队结构日趋流行的原因,进而阐述这类团队领导的典型职责,并根据最近的深入研究结果和笔者的经验,揭示一个有效的团队所具备的特征,因其对团队领导能否有效发挥职责至关重要。     

Recent studies of particle packing in organic coatings

Organic coatings often contain sufficient pigmentation that the pigment volume concentration (PVC) and the critical PVC (CPVC) must be carefully considered. Past work has shown that the CPVC can be identified with the random densest packing of pigment particles after considerations of the adsorbed polymer layer on the particles is taken into account, and that this packing can be predicted by empirical particle packing algorithms developed for mixtures of particle sizes. Recent studies have shown that local fluctuations of pigment and polymer concentrations in a film can lead to local film volumes that can exceed the CPVC even though the average PVC for the whole film (the global PVC) is below the CPVC. These effects are consistent with observations of void formation in films below the CPVC, and can be analyzed by local film statistics. We have also recently performed simulations of particle packing by the compression of multiple hard spheres that allows further insight into local concentration fluctuations in PVC within a film.     

Smoke gas analysis by Fourier transform infrared spectroscopy – summary of the SAFIR project results

The determination of toxic components from fire gases is difficult because the environment is hot, reactions are often temperature dependent, and a lot of soot may be produced. Due to the different properties of the gas components, a different time‐consuming procedure for each species has traditionally been used. The use of FTIR (Fourier transform infrared) spectrometers as a continuous monitoring technique overcomes many of the problems in smoke gas analyses. FTIR offers an opportunity to set up a calibration and prediction method for each gas showing a characteristic spectral band in the infrared region of the spectrum. The objective of the SAFIR project was to further develop the FTIR gas analysis of smoke gases to be an applicable and reliable method for the determination of toxic components in combustion gases related to fire test conditions. The optimum probe design, filter parameters and the most suitable sampling lines in terms of flow rate, diameter, construction material and operating temperature have been specified. In the large scale, special concern was given to the probe design and the effects of the probe location as well as practical considerations of the sampling line length. Quantitative calibration and prediction methods have been constructed for different components present in smoke gases. Recommendations on how to deal with interferents, non‐linearities and outliers have been provided and a verification method for the spectrometer for unexpected variations and for the different models have been described. FTIR measurement procedures in different fire test scenarios have been studied using the recommendations of this project for measurement techniques and analysis and an interlaboratory trial of the FTIR technique in smoke gas analysis was carried out to define the repeatability and reproducibility of the method in connection with a small scale fire test method, the cone calorimeter. Copyright © 2000 John Wiley & Sons Ltd.     

REFLECTION OF OBLIQUE INCIDENT WAVES BY PERFORATED CAISSONS WITH TRAVERSE WALL

The interaction of oblique incident waves with infinite number of perforated caissons is investigated. The fluid domain is divided into infinite sub-domains by the caissons, and eigen-function expansion is applied to expand velocity potentials in each domain. A phase relation is introduced for wave oscillation in each caisson, and the structure geometry is considered in constructing the models of reflection waves. The reflected waves with the present analysis include all of the waves traveling in different directions when incident wave period is short. Numerical examinations show that velocities at the inner and outer sides of the front walls of caissons are close to each other, and reflection coefficients satisfy the energy conservation relation very well when porous effect parameter is infinite. Numerical results show that the reflection coefficients of oblique incident waves are smaller for shorter caissons at low frequency, and decrease with the increase of wave incident angle.     

全球3G纵览(月报)

2005年9月,没有新增的3G许可证.因此,截止到2005年9月底,全球共颁发了151张3G许可证.但是由于一些已获得许可证的公司将许可证退还给了政府,所以,目前实际由公司持有的有效3G许可证只有143张.在这143张3G许可证中,选择WCDMA的有133个运营商,cdma2000的有4家运营商,另外还有加拿大的5张PCS和澳大利亚的CKW Wirless公司的i-BURST系统.     

全球3G纵览(月报)

全球3G许可证和商用网络 1．许可证 2005年10月,没有新增的3G许可证,因此,截止到2005年10月底,全球共颁发了151张3G许可证,其中包括加拿大的5张PCS 3G许可证。但是由于一些已获得许可证的公司将许可证退还给了政府,所以,目前实际由公司持有的有效3G许可证只有143张。     

A high pressure shock tube study of n-propylbenzene oxidation and its comparison with n-butylbenzene

Ignition delay times have been measured for mixtures of n-propylbenzene in air (≈21% O₂, ≈79% N₂) at equivalence ratios of 0.29, 0.48, 0.96 and 1.92 and at reflected shock pressures of 1, 10 and 30 atm in a heated high-pressure shock tube over a wide temperature range (1000–1600 K). The effects of reflected shock pressure and of equivalence ratio on ignition delay time were determined and common trends highlighted. Simulations were carried out using the n-propylbenzene sub-mechanism contained in an n-butylbenzene reaction mechanism available in the literature. This kinetic model was improved by including pressure dependent reactions which were not in place previously and the addition of the NUI Galway C₀–C₄ sub-mechanism. These simulations showed very good agreement with the experimental data. Additionally a comparison is made with experimental data previously obtained and published for n-butylbenzene over the same range of conditions and common trends are highlighted.