阿昔洛韦治疗小儿水痘50例疗效分析

目的:对阿昔洛韦治疗小儿水痘疗效进行分析.方法:治疗组:在对症、龙胆紫外涂等一般治疗基础上加用阿昔洛韦,剂量为10 mg/(kg.d),加入生理盐水中静滴,每日2次,连用4~6 d.对照组:在治疗组一般治疗相同基础上加用利巴韦林,剂量为10~15 mg/(kg.d),静滴,每日1次,连用4~6 d.结果:治疗组在退热时间、抑制疱疹出现时间及疱疹基本结痂时间均优于对照组,统计学上差异有显著性(P<0.01).在治愈率、有效率方面治疗组明显优于对照组,差异有显著性(P<0.05).结论:阿昔洛韦治疗水痘,可迅速控制病情,与利巴韦林比较,在退热时间、疱疹结痂时间均明显缩短,而且药物性能安全,可作为治疗水痘首选药物.     

时频分布中交叉项抑制的研究进展

从整个时频分析发展的历史来看，其发展过程是以克服Wigner-Ville分布（WVD）的缺陷为动力的。本文以抑制Wigner-Ville分布中的交叉项为线索，在简要介绍时频分析中已有的一些方法的基础上，综述了近年来在抑制交叉项干扰方面的研究进展，并对现存的有关问题进行了探讨。     

利用ASR和TTS技术的股票查询系统的设计

服务器端 :1)打开一通信通道并告知本地主机 ,它愿意在某一端口上接收客户的请求。在 TCP/ IP网络中 ,端口分为两部分 ,一部分是保留端口 ,另一部分是自由端口。其中保留端口占很小的数目 ,以全局方式进行分配 ,也就是我们常说的周知口。而自由端口占全部端口的绝大部分 ,它以本地方式分配 ,不具有全局唯一性。当一个客户进程要与远程服务器通信前 ,首先需要申请一个自由端口 ,然后通过服务器的周知口与远程服务器取得联系 ,收发数据。2 )等待客户请求到达该端口。3)接收到不同通道的请求 ,处理该请求并发送应答信号。由于客户端可同时接…     

海空对抗模拟的面向对象的分析与实现

基于海空对抗的战术背景，结合面向对象的建模技术和数据库技术，给出了基于面向对象的海空对抗的建模与VC 程序实现过程，以及空战部分程序实现流程图。仿真的数学模型基于数理统计理论，并阐述了部分关键模型的实现方法和功能。最后，进行了依据想定的模拟与结果分析。     

Dynamics and control designs for internal thermally coupled distillation columns with different purities, Part 2: close loop analysis and control designs

Interaction between overhead and bottom composition loops of internal thermally coupled distillation columns (ITCDIC) with four purities are analyzed by means of relative gain array, condition number and singular value decomposition, which indicates that high- and very high-purity ITCDIC are well coupled and ill-conditioned systems with severe gain directionality problem. Based on the above dynamic behaviors, suitable control schemes of four different purity systems are studied. In low-purity system, internal model control (IMC) is better than decentralized proportion integral differential (D-PID) control in terms of response speed and remaining errors. In moderate-purity system, D-PID can effectively reject large load disturbances while IMC fails due to severe mismatch between model and plant. In high-purity system, neither IMC nor D-PID can provide satisfactory control so that modified IMC and multivariable PID with singular value decomposition scheme are presented respectively to improve control performances. Finally, in very high-purity systems, the combined feed-forward and feedback control scheme is proposed to deal with extremely sluggish responses to load disturbances.     

高校职称评聘中必须引起重视的若干问题

目前高校所采用的职称评聘制度，对专业技术队伍的建设、成长发挥着相当重要的作用，但仍然存在一些问题，需要引起重视并着手解决。     

PERSPECTIVES ON URBAN WATER INFRASTRUCTURE IN CHINA FOR THE 21~(ST) CENTURY: SDMUWEIC MODEL

Based on system dynamics approach, SDMUWEIC model is developed in order to evaluate future dynamics of urban water infrastructure development in China. Firstly, this paper presents the basic structure and characteristics of the model, focusing on water infrastructure's dynamic relationships with population increase, economic development, water resources shortage and water conservation practices. Secondly, model veracity and robustness tests based on behavior reproduction and uncertainty analyses are illustrated. Thirdly, based on the model, future patterns of China's urban water infrastructure investment requirements are simulated, and effectiveness of two different policy scenarios are evaluated. Finally, conclusions and policy implications are drawn, allowing insights into China's sustainable water infrastructure policies and managements.     

三个几何不等式的证明

应用三角形重心坐标和三元二次型不等式,建立涉及三角形内部一动点的三个新型的几何不等式。     

极危植物毛果木莲花粉败育及其结籽率研究

 毛果木莲是云南特有种,也是被IUCN评估为极危种(CR)的濒危植物.通过石蜡切片技术与显微观测技术对极危物种毛果木莲花粉败育、花粉胚珠比与结籽率进行研究,发现该物种花粉败育率达29%,正常花粉胚珠比>4527,结籽率聚合果达到34%,单果达44%.结合花粉胚珠比,初步认为该物种交配系统为专性异交类型,花粉败育对结籽率低影响不大.结合该物种野外种群调查,初步分析认为该物种的选择性败育特性是适应外界环境资源有限的一种生殖保障策略.     

一个具有四翼混沌吸引子的新系统及其参数辨识

研究了一个新的复杂的四维混沌系统,该系统每个方程中包含一个三次乘积项,有9个平衡点,它们相对于原点和坐标轴具有完美的对称性,并且相对于线性特性有很好的相似性.基于稳定性理论,通过选取正确的初始值和合适的观测器,迅速、精确地辨识该系统的未知参数.此方法可以推广应用于一类连续动力系统.数值仿真证明了该方法的正确性和有效性.