聚乙烯电缆皮形变结构的X射线衍射分析

对聚乙烯电缆皮室温单轴拉伸测试．当拉伸速度达到一定数值时,其应力（σ）-应变（ε）曲线出现"类屈服"现象．对不同形变程度（εi）的样品进行X射线衍射线形分析,结果表明,其微观畸变度（e）随形变度（ε）的变化与宏观σ-ε曲线变化规律相似．     

Effect of Fabric Elongation on the Making Up of Pressure Garments

Pressure garments are widely used in Hong Kong andmany other countries for burn rehabilitation.Thesegarments are mainly made of elastic Lycra fabrics andtailor-made to individual patient's measurement toprovide an appropriate amount of skin-garment in-terface pressure for medical treatment.However,thefabric tension would be reduced due to fabric elonga-tion under prolonged period of stress,and thus theskin-garment interface pressure cannot be main-tained after repeated use of the garment.This paperaims to study the behaviour of fabric elongation of thefabrics commonly used for making pressure garmentsin U.K.and/or Hong Kong.Attempts to correct theexisting practice of drafting the pressure garments forproviding a more effective clinical treatment.     

基于GIS海洋自动化系统的开发与应用

从组件式技术出发,采用了MapX,Visual Basic,SQL Server2000集成技术设计开发了浙江省海洋业务信息系统.该系统主要实现了基于海洋系统的相关数据录入与修改;浙江省及周边地区相关GIS信息的录入、修改和显示;在最新的或者用户自定义的map上面显示实时的热带气旋路径及相关信息的显示;在有相关资料的情况下实现历史台风查询;比较各国对于同一台风的不同预报结论给出参考意见及依据.本研究的优势主要有2个方面:一是用数据库系统代替文件系统存储GIS和海洋数据信息;二是把GIS和海洋业务系统相结合,设计出来的新系统应用更加方便、功能更加强大.     

基于MapX的水库地理信息系统研究

随着空间技术的发展,地理信息系统逐步应用于生活的各个领域.以莱芜市雪野水库地图为模板,介绍使用Mapx可视化地实现对水库属性数据库和空间数据库的双向查询技术,以获得较为精确的基本设施信息.同时,介绍了系统基本模块的具体实现方法,包括:地图的基本操作(如放大、缩小、漫游等)、地图的双向查询、地图图层的编辑和鹰眼功能模块.该系统有效实现了水库管理的信息化,实现了水库管理效益的价值最大化.     

Functionalization of PCL fibrous membrane with RGD peptide by a naturally occurring condensation reaction

Poly(e-caprolactone)(PCL)is widely adopted as an ingredient for tissue engineering scaffolds.To improve its cell affinity,in this study,we developed a new method to introduce bioactive RGD peptides onto the surface of PCL via condensation reaction between 2-cyanobenzothiazole(CBT)and D-cysteine.The PCL fibrous membranes were prepared by electrospinning,and RGD functionalization was characterized by fluorescence microscopy,scanning electron microscopy(SEM),X-ray photoelectron spectroscopy(XPS)and water contact angle(WCA).As expected,our results demonstrated the successful RGD immobilization on the surface of PCL.RGD modification improved the hydrophilicity of PCL,changing their WCA from 112.20°to38.35°.Cell adhesion,spreading and proliferation of 3T3fibroblasts were also enhanced.We therefore believe that the methods reported in this study was facile and effective for functional modification of the hydrophobic PCL scaffolds.The moderate reaction conditions are also suitable for covalent immobilization of bioactive molecules onto PCL.     

Molecular evolution of connective tissue growth factor in Cyprinidae (Teleostei: Cypriniformes)

Connective tissue growth factor (CTGF) plays an important role in regulation of cell growth, differentiation, apoptosis and individual development in animals. The study of sequences variation and molecular evolution of CTGF gene across various species of the cyprinid could be helpful for understanding of speciation and gene divergence in this kind of fish. In this study, 19 novel sequences of CTGF gene were obtained from the representative species of the family Cyprinidae using PCR amplification, cloning and sequencing. Phylogenetic relationships of Cyprinidae were reconstructed by neighbor-joining (NJ), maximum parsimony (MP), maximum likelihood (ML) and Bayesian method. Oryzias latipes from the family Cyprinodontidae was assigned to be the outgroup taxon. Leuciscini and Barbini were clustered into the monophyletic lineages respectively with the high nodal supports. The estimation of the ratio of nonsynonymous to synonymous substitution (dN/dS) for the various branches indicated that there stood the different evolution rates between the Leuciscini and the Barbini. With the ratio of dN/dS of the Leuciscini being lower than that of the Barbini, species within the Barbini were demonstrated to be subjected to the relatively less selection pressure and under the relaxable evolution background. A 6 bp indel (insertion/deletion) was found at the 5' end of CTGF gene of Cyprinidae, and this 6 bp deletion only appeared in the Leuciscini, which is a typical characteristic of the Leuciscini and provides evidence for the monophylogeny of the Leuciscini. For the amino acid sequences of CTGF protein, the most variations and Indels were distributed in the signal region and IGFBP region of this protein, implying that these variations were correlated with the regulation of the CTGF gene expression and protein activity.     

Safety Verification of Semi-Algebraic Dynamical Systems via Inductive Invariant

To verify the safety of nonlinear dynamical systems based on inductive invariants, key issues include defining the most complete inductive condition and discovering an inductive invariant that satisfies the specified inductive condition. In this paper, to lay a solid foundation for future research into the safety verification of semi- algebraic dynamical systems, we first establish a formal framework for evaluating the quality of continuous inductive conditions. In addition, we propose a new complete and computable inductive condition for verifying the safety of semi-algebraic dynamical systems. Compared with the existing complete and computable inductive condition, this new inductive condition can be easily adapted to achieve a set of sufficient inductive conditions with different level of conservativeness and computational complexity, which provides us with a means to trade off between the verification power and complexity. These inductive conditions can be solved by quantifier elimination and SMT solvers.     

一种阵列式传感器数据融合方法的研究

提出了一种基于支持度和自适应加权的阵列式传感器数据融合方法。其特点是通过关联融合多组测量信号序列以降低静态数据的随机测量误差。对单传感器测量信号序列,采用支持度方法计算每个测量数据的综合支持度和加权因子,然后对测量信号序列进行加权融合。对阵列式传感器多组测量信号序列,基于单传感器数据融合,利用自适应加权方法,在总均方误差最小意义下进行多组测量信号序列数据融合。仿真结果表明,该阵列式传感器数据融合方法是有效的。     

鄂西滑坡的遥感调查──以屯堡─龙马地带为例

运用遥感判释理论,结合调查区内的地质构造、地貌及岩性等基本情况、建立滑坡判读标志通过村屯堡-龙马地带的遥感调查,解译出巨型滑坡2处,中小型滑坡16处．结果表明,应用大比例尺航片判释滑坡效果明显．