Windows环境下蒙古文复杂文本处理的研究

简要介绍了复杂文本和Uniscribe布局引擎,然后介绍一种基于Uniscribe的蒙古文Unicode文本的解释算法,解决Windows环境下字处理软件不支持蒙古文国际标准编码的问题.该算法具有较好的通用性,能够有效处理多种复杂文本语言,在蒙古文字处理软件MWord中的应用说明了该算法的有效性.     

基于UML网络化标准零件库系统的分析与设计

在分析和研究标准零件库信息系统的组成和统一建模语言(unified modeling language,UML)的建模机制的基础上,提出了一种基于UML网络化标准零件库信息系统的建模方法,并采用Rational Rose工具对其进行面向对象的可视化建模,详细地给出了系统用例模型、静态模型和动态模型的建模过程。采用该方法建立的系统模型,模块划分清晰,功能明确。     

利用从sine-Gordon方程得到的变换求解非线性波动方程

对一种求解非线性波动方程的新方法进行了扩展,并对其中的关键操作步骤做了改进,利用改进后的方法可以构造出一些新的非线性波动方程的精确解。     

云南烟草根结线虫拮抗真菌分离鉴定初报

 从云南省28个县采集152个土样及发病烟根,利用直接分离法和诱集分离法分别从根结线虫卵囊、卵、雌虫和幼虫分离到400株拮抗真菌,它们包括拟青霉属、镰刀菌属、普可尼亚属、木霉属、链格孢属、曲霉属、青霉属、柱孢菌属、茎点霉属、单顶孢属、钩丝孢属、节丛孢属、矛束孢属等21属及一些不产孢的拮抗真菌,其中淡紫拟青霉、厚垣孢普可尼亚菌、尖孢镰刀菌为分离频率最高,约占分离数的60%.卵囊、卵和雌虫寄生真菌种类和数量远远大于二龄幼虫寄生真菌种类和数量,不同县寄生真菌种类和数量差异较大.     

一类工业炉温度系统的模糊控制

针对工业炉温度系统存在的混沌现象,借助模糊控制技术,克服了用传统PID难于控制的炉温混沌现象;系统的仿真与实际运行效果表明:模糊控制是克服混沌现象的一种有效方法。     

基于Netfilter的网络用户认证系统

随着宽带的发展,对网络用户的身份认证和合理控制十分重要.为保证各用户合理地使用校园网,在Linux操作系统上设计了一个基于Netfilter框架的校园网出口认证系统. 该系统在Netfilter框架的支持下,能对上网用户进行IP连接数和带宽控制.另外,系统提供Web界面认证,且用户可以选择不同的网络出口和使用的时长.     

高频电磁脉冲循环冷却水污垢处理与热阻监测系统

换热设备中循环冷却水系统在高温下容易产生污垢,不但会降低换热设备的换热效率,还会影响设备安全。通过模拟实际工业循环冷却水结构,搭建了微型循环冷却水实验平台,采用高频电磁脉冲对人工配置的碳酸钙循环冷却水溶液进行阻垢处理,观察空白实验组和不同频率的高频电磁脉冲处理组中水垢形成情况,并利用自行设计的热阻监测系统对管道热阻进行监测。实验结果表明：高频电磁脉冲对循环冷却水起到了很好的阻垢作用,主要表现为循环冷却水的电导率下降趋势和pH值上升趋势均变缓。根据模拟换热器的热阻监测结果显示,高频电磁脉冲处理组的热阻要小于空白实验组的热阻,并进一步证实了高频电磁脉冲的阻垢作用。     

Sliding mode identifier for parameter uncertain nonlinear dynamic systems with nonlinear input

This paper presents a sliding mode(SM) based identifier to deal with the parameter idenfification problem for a class of parameter uncertain nonlinear dynamic systems with input nonlinearity. A sliding mode controller (SMC) is used to ensure the global reaching condition of the sliding mode for the nonlinear system;an identifier is designed to identify the uncertain parameter of the nonlinear system. A numerical example is studied to show the feasibility of the SM controller and the asymptotical convergence of the identifier.     

Construction of Oriented Structure in Inner Surface of Small-Diameter Artificial Blood Vessels: A Review

There is an urgent need for small-diameter artificial blood vessels in clinic. Physical, chemical and biological factors should be integrated to avoid thrombosis and intimal hyperplasia after implantation and to promote successful fabrication of small-diameter artificial blood vessels. From a physical perspective, the internal oriented structures of natural blood vessels plays an important role in guiding the directional growth of cells, improving the blood flow environment, and promoting the re...     

Silk Fibroin Microspheres： Preparation and Application for Controlled Drug Delivery

Silk fibroin （SF）, a natural protein polymer, has several unique properties such as aqueous processability, biocompatibility, and biodegradability. Due to these advantageous properties, it is promising for applications in various fields, especially drug delivery. In this paper, the simple preparation of SF microspheres was discussed via self-assembly. Some of SF＇s physicochemical properties and morphology were also investigated. The results show that the morphology, size and size distribution of silk microspheres depend upon various processing parameters, especially including volume ratios among SF, ethanol and polyvinyl alcohol （PVA）. Regular silk microspheres were obtained in PVA solution when adjusting the volume ratios of silk to ethanol from 20：1 to 20： 9. We also found that SF microspheres with various appearances were formed by addition of different PVA solution concentrations under a constant silk solution to ethanol volume ratio. From the Fourier transform infrared spectroscopy（FTIR） of silk microspheres, it was found that introducing ethanol into the SF solution induced conformational change from random coil to β-sheet. Additionally, under the observation of scanning electron microscopy （ SEM）, the shape of self-assembled silk microspheres was determined to be spherical. Finally, SF＇s potential as drug delivery carriers was discussed in the experimental results.