基于ECC算法的软件注册码方案

通过对软件注册码的性能要求进行分析，提出了基于椭圆曲线密码算法ECC的注册码应用方案，该方案充分发挥了ECC算法签名和认证模块的相对独立性和安全性，更好地防止了非法注册码的传播和制作，是一个高强度的软件注册码方案。     

一种外伸端板半刚性节点的有限元模拟分析

本文利用有限元软件ANSYS对一种外伸端板半刚性节点试件进行了有限元模拟分析,考虑了材料和几何非线性,并在有限元建模过程中着重讨论了模型中所使用的有限元单元和接触算法。通过有限元模拟分析,讨论了这种模拟节点的Mises应力分布,得到了模拟的M-θr曲线,可为该类节点的设计提供参考。     

独柱支承的曲线匝道桥梁设计

本文介绍了曲线桥梁的受力特点,论述了曲线梁桥调整墩柱偏心的平衡设计方法,分析了不同支承形式和预应力钢束对曲线梁桥受力的影响,对曲线梁桥的施工和构造要求进行了论述。     

试论微波加热在木材干燥加工中的应用

阐述了微波加热木材在木材加工中的原理和特性,分析了微波干燥木材的机理和优点,介绍了微波加热技术研究与应用情况,展望了微波干燥木材的应用前景。     

超临界流体干燥半工业化在氧化铝粉体制备上的应用

醇洗后的拟薄水软铝石(Al2O3·XH2O)的醇凝胶,采取超临界流体干燥处理技术制得了超细氧化铝粉体。采用透射电镜对试验粉体粒子的大小和分散度进行了表征,结果表明:在260℃×7MPa×1h.的超临界流体条件下,得到平均粒度小于10nm,高的比表面积的纤维状Al2O3粉体。有效地改善了粉体的团聚程度。     

The Yarn Curve and Tension in Rotor Spinning

The effective way of finding the yarn curve shape and tension of OE（open end） yarn inside the rotor is carried out and treated by dividing the yarn curve into two parts, from which the trajectory of the yarn sliding on the navel surface is also obtained. It is pointed out that the yarn curve shape and tension will both fluctuate with the trajectory＇s revolving cycle inside the rotor. However, the fluctuation is not too great, so the motion can still be regarded as approximately steady for dynamic analysis.     

Preparation of 3-D porous fibroin scaffolds by freeze drying with treatment of methanol solutions

In this study, silk scaffolds with appropriate porous structures were prepared by adjusting solution concentrations and providing treatment with methanol solutions in the way of freeze drying. The effects of the preparation conditions on the microstructures and properties of the scaffolds were discussed. Fibroin solutions with different concentrations of 4, 6, 8, 10 wt% were used respectively to prepare the scaffolds. The effects of the addition of 20 vol% methanol before or after freeze drying to the 4 wt% fibroin solution were investigated. As demonstrated by Scanning Electron Microscope (SEM), the fib-roin scaffolds prepared without methanol had porous microstructures composed of thin sheets, and the sizes of the pores decreased with the increase of the fibroin solution concentrations, while the scaffolds prepared in the presence of methanol showed porous microstructures formed by fine-particle aggregates. The porosities and mechanical properties of the prepared fibroin scaffolds under different conditions were tested. The crystalline structures and conformations of the fibroin scaffolds were detected by Fourier transform infrared spectroscopy (FT-IR) and X-ray diffraction (XRD).     

焚烧炉中单元垃圾干燥过程的试验研究

通过在马弗炉内以及循环流化床内对单元垃圾（土豆块）进行干燥试验，分别获得了其在炉内的干燥特性曲线．试验结果显示，在马弗炉内低温区干燥温度对垃圾干燥过程的影响较大；在同一干燥温度下，随着垃圾厚度的增加，干燥时间近似呈指数形式增加；在干燥的大部分阶段，土豆块内温度随含湿量减少呈逐渐上升趋势．在循环流化床内，土豆块的整个干燥过程中只有降速段，而不存在恒速段和初始段，垃圾厚度对干燥过程有显著影响．     

Study on seal improvement and rotor thrust control of centrifugal compressor

Fluid pressure variations due to process fluctuations or balance drum seal degradation can result in rotor thrust increasing that may jeopardize thrust bearing and compressor’s reliability. Also, the leakage flow through balance drum seal can seriously affect the efficiency of compressor. A method that can improve both the efficiency and reliability of centrifugal compressor is presented. The method focused on rotor thrust control and balance drum seal upgrading. The low leakage feature of Dry-Gas-Seal（DGS）, high reliability of labyrinth, and the feasibility of upgrading existing structure are taken into account at the same time to design a combined labyrinth-dry gas seal system on the balancing drum. Based on the combined seal system, a Fault Self-Recovering（FSR） system for the fault of rotor shaft displacement is introduced to assure the safety and reliability of centrifugal compressor. The modern Computational Fluid Dynamics（CFD） is used to validate this envision. The numerical result and relevant information indicate that the combined sealing system could improve the efficiency of the centrifugal compressor by about 4%.     

一种新的保留语义的P2P系统索引构造方法

提出了一种新的P2P系统索引构建方法.它使用多个简单本体(ontology),对同一资源进行描述,将各个ontology描述转化为相应的本体序号(ontology ID),然后使用Hilbert空间填充曲线,实现从多维ontology ID到一维索引值的映射,得到保留了语义的索引值.根据这个索引值,在Chord等结构化P2P上发布和查找资源.该方法对资源的描述更加准确、简单,资源的发布和查询也更加灵活和高效.