2005年中国电信运营市场发展现状与展望

2005年是中国电信业的“转型年”．国内电信运营商依赖投资拉动增长速度减缓的趋势得以深化。国内电信运营商的投资更加趋于理性。通过总结2005年田内电信运营市场态势、各运管商发展策略、行业热点及未来展望四个方面阐述国内电信运营市场的发展状况。     

A novel nickel-based mixed rare-earth oxide/activated carbon supercapacitor using room temperature ionic liquid electrolyte

Mesopore nickel-based mixed rare-earth oxide (NMRO) and activated carbon (AC) with rich oxygen-contained groups were prepared as electrode materials in a supercapacitor using room temperature ionic liquid (RTIL) electrolyte. These electrode materials were characterized by XPS, XRD, N₂ adsorption, SEM as well as various electrochemical techniques, and showed good properties and operated well with RTIL electrolyte. A 3 V asymmetrical supercapacitor was fabricated, which delivered a real power density of 458 W kg⁻¹ as well as a real energy density of 50 Wh kg⁻¹, and during a 500-cycle galvanostatic charge/discharge measurement, no capacity decay was visible. Such promising energy-storage performance was to a large extent ascribed to nonvolatile RTIL electrolyte with wide electrochemical windows and high stable abilities worked with both electrode materials.     

Thermo-acoustic instability in the horizontal Rijke tube

The instability curve of a Rijke tube system was obtained accurately by following different paths of heat power and flow-rate for three regions and by defining its locus from the criterion based on the measured sound pressure levels. The unstable limits in the region of flow-rate lower than that at the minimal power are compared with previous data. To observe the effect of turbulence on the unstable limits, inflow turbulence was introduced by placing a bundle of circular cylinders upstream of the heating part (50< Re_d< 700). The large-amplitude inflow fluctuation may delay the transition of the chamber acoustic mode to the unstable zone even at a sufficient power.     

消防车水泵系统的保温方法初探

针对高寒地区消防车保温、防冻的问题进行了分析,并提出了解决问题的办法。     

职业道德建设的调查与思考

近年来各行各业加强职业道德建设,取得了一定成绩,涌现了一大批敬业爱岗、服务社会的岗位明星,但也存在着这样或那样的认识误区或现实局限,如形式主义、短期行为和领导观念异位等,这极大地阻碍了职业道德建设的深入推进。职业道德建设就其特征而言,它具有长期性、时代性和阶级性、相对稳定性以及创新性等属性,对此需要有一个理智而清晰的认识。应从营造良好的社会氛围、制定切实可行的道德准则、进行规范化的教育引导和发挥先进人物的示范作用等几方面入手,把职业道德建设推向深入。     

Impact of Aspen Log Storage with and without Protection on OSB Performance

Outdoor log storage without protection can change the mechanical and chemical properties of wood due to infection by various fungi. To understand how outdoor log storage affects the wood and, subsequently, the strandboard quality, two piles of aspen logs were set up outside and stored for a period of four months (July to November). One of the piles was treated with a biological solution to prevent fungal growth. The other one was stored without treatment. Both piles contained non-debarked and partially debarked logs. Evaluation of sap stain development indicated that all logs had been colonized by staining fungi with average stain coverage of 9.37 to 57.18% and maximum stain penetration of 3.58 to 7.27 cm over the log cross section. The variation of fungal colonization depended on log treatment and bark condition. The most effective way to prevent stain growth was the combination of biological treatment and partial debarking. A series of strandboard was prepared from fresh and aged aspen logs. All boards made from stored logs were statistically comparable to or superior to the control boards made from fresh aspen logs. The boards made from treated/partially debarked and untreated/non-debarked logs were statistically comparable to each other except for wet MOR. In addition, these two board types were statistically stronger than other boards made from treated/non-debarked and untreated/partially debarked logs in terms of IB and water resistance. Some individual stained strands were observed on the finished board surface. Less staining was found in the boards prepared from biologically treated and partially debarked logs, compared with those made from other stored logs.     

从软交换到IMS

标准进展虽然到目前为止业界尚无一个通用或精确的NGN定义,但是 NGN的标准化步法却在大大加快,包括ITU、ETSI、IETF、3GPP 等标准组织和多个论坛正在广泛合作,积极推进NGN标准化。     

临床检验实验室自动化与实验室国际标准化认可的准备

临床检验实验室的自动化集中管理（LAS）及实验室的认可是目前临检专业讨论比较集中的问题.与传统的实验室比较分散、各自独立的分析设备相比,LAS具有集成度高,能够充分利用检验设备资源,与临床信息系统（CIS）联系更密切的特点.本文就实际临床检验中心投入的实验室集中管理系统,对其结构、流程设计、以及导入自动化系统前后实验室改造所带来的变化进行了分析.     

瑞典Laholm沼气厂的运行实践

瑞典沼气的总产量约为1400GW·h,约有60%产自200多家市政污水处理厂的污泥消化池,垃圾填埋场的产量占30%,剩余的10%主要来源于工业废水处理厂和混合消化厂。一般情况下,沼气用作热源和发电,也可以作为汽车燃料。有机废物转化成沼气的同时还产生了消化残余物,可用作生物肥料。在瑞典有机废物填埋要课以重税,并且自2005年开始该国已严禁有机物的填埋处理,所以人们逐渐开始了对有机物混合消化的重视和研究。目前瑞典约有10家沼气厂利用厌氧消化处理收集来的各种有机废料,总处理能力>20×104t/a。多数沼气厂将牲畜粪便作为主要原料,再辅以其他…