火灾烟气浓度弥散过程中分岔与奇异性研究

结合某大型储油罐区的自然环境条件，建立了火灾烟气浓度及其随时空变化的数学模型；借助ALOFT-FT软件，揭示火灾烟气浓度弥散过程中的分岔和奇异性；利用三维多彩散点和三维矩阵技术对火灾烟气中CO，SO2和PM10的分岔和奇异性实现可视化，绘出了在下风向轴线上和地表上火灾烟气中CO，SO2和PM10浓度的弥散燕列图和弥散燕影图，为制定重大事故应急救援预案和火灾事故人员疏散提供科学的决策依据。     

流体附加阻尼及其对微型泵输出性能的影响

为提高微型泵的输出能力,从理论上分析了流体对薄膜驱动器动态特性的影响规律,建立了流体作用力及附加阻尼的计算模型.通过理论分析,说明减小流体黏度、增加腔体高度和阀孔直径会降低流体附加阻尼和减小流体对驱动器的反作用力,从而可提高泵的最佳工作频率和输出流量.设计制作了压电泵,并进行了试验,以水和空气为介质测试的压电振子的基频分别为49 6 Hz和2 72 kHz,说明流体黏度对薄膜驱动器的基频有很大影响.试验结果表明,流体黏度的增加会降低驱动器的基频,增加阀孔直径可提高泵的输出流量和最佳工作频率.     

A Novel Degradation Pathway of Zn（dmid） （ phen）2 in Pyridine

The light-oxidation degradation processes of Zn(dmid)(phen)2(dmid = 4, 5-dimercapto-1,3-dithiole-2 one, phen = 1,10-phenanthroaline) in pyridine solvent has been monitored, h has been found under the light, dmid^2- of Zn(dmid)(phen)2 in pyridine solution could generate NCS^- and NCS^-replaces dmid^2- to form Zn(NCS)2 (phen)2 simultaneously. The crystal structure of Zn(NCS)2 (phen)2 has been determined. In the crystal of Zn(NCS)2 (phen)2. two NCS^- ligands are arranged in syn-configuration, and there is strong π-π interaction between the two adjacent parallel phen.     

Allocation of power generating and shipping of Hanjiang upstream cascade

The optimal model and simulating model of the Hanjiang cascade reservoirs operation with one day as its calculating period are established to coordinate the contradictions between power generating and shipping. The optimal model is solved by progressive optimality algorithm method adopting the theory of large system decomposing and coordinating. By analyzing the water allocation results obtained from six schemes, which are two cascades, four cascades and seven cascades joint operation considering shipping or not, the contradiction degree between power generating and shipping is investigated and some joint operation schemes are proposed.     

基于子波变换的消噪方法在涡街流量传感器中的应用

基于子波变换消噪原理，结合流量测量持定要求，提出了一种适用于在涡街流量传感器信号处理的单支重构滤波方法，同时给出了滤波级数的选取方法，这种计数方法能够有效地扩大涡街流量传感器的量程下降，通过对实际信号的分析，证实了方法的有效性。     

关于线性规划问题解的讨论

用矩阵的奇异值分解和广义逆讨论标准线性规划问题解的存在性和唯一性问题。     

半导体纳米粒子气—固复相光催化氧化气相有机污染物的研究

本文介绍了半导体纳米粒子气—固复相光催化氧化法的原理及影响因素,探讨了气相有机物光催化降解的过程和动力学,综述了提高半导体纳米粒子光催化活性的途径,讨论了气相有机污染物光催化降解进一步研究的方向,并对应用前景作出展望。     

使用IEEE802.1X技术优化校园网计费管理

通过对IEEE 80 2 .1X技术的认证计费系统的分析 ,论述如何用其解决校园网计费管理中现存的问题 ,优化校园网的计费管理     

蚂蚁算法在公交查询最短路径求法中的应用

公交乘客出行路径选择是公交乘客信息系统的关键技术 ,提出以换乘次数最少为首要目标、出行距离最短为第二目标的算法 ,本算法是基于广度优先搜索并结合蚂蚁算法提出公交路线最短路径选择的新算法     

A complete sequence and comparative analysis of a SARS-associated virus(Isolate BJ01)

Severe Acute Respiratory Syndrome (SARS) is a newly identified infectious disease[1—5]. The global outbreak of SARS has been threatening the health of people worldwide and has killed 353 people and infected more than 5462 in 27 countries, as reported by WHO on April 29, 2003 (http://www.who.int/csr/sarscountry/en). Although it has been recognized that a variant of virus from the family of coronavirus might be the candidate pathogen of SARS[1—5], its identity as the unique pathogen sti…