Synthesis and Characterization of PEG-like Structures on Nitinol Surface under ECR-cold-plasma

The synthesis and characterization of PEG-like macromolecular structures on Nit inol surface from tri (ethylene glycol) dimethyl-ether under ECR-cold-plasma conditions were discussed. It was demonstrated that based on high-resolution ES CA, ATR-FTIR and contact angle investigations, the deposited PEG-like layers a re composed mainly of -CH 2-CH 2-O- linkages. These structures have a relati vely low contact angle. Compared to the unmodified surfaces, the plasma-treated Nitinol surfaces are more hydrophilic. Plasma enhanced coatings of PEG-like la yers can prevent Ni ion from releasing, thereby improving the biocompatibility o f Nitinol.

The 3D Spiral Structure Pattern in the Atmosphere

The steady analytical solution of the perturbation equations describing the mesoscale vortex in the atmosphere is obtained. By analyzing the 3D wind field, the 3D spiral structure in physical space for unstable stratification is found. In many respects such as the 3D distribution of pressure and vorticity fields, the mesoscale spiral vortex is very similar to typically real cyclones. Key words Spirals tructure - Cyclones - 3D dynamical system Supported by the State Key Research Project on the Nonlinear Science and the Fund for Doctoral Station of the Ministry of Education, China.

Synthesis, Characterization and Crystal Structure of Quaternary Complex of Gadolinium (Ⅲ)

A new quaternary mixed anion complex of gadolinium(Ⅲ), [Gd(CH 3CH 2COO) 2(N O 3)(phen)] 2, was synthesized and structurally characterized. The ESR spectr um of the complex with effective g values of 5.314, 2 473 and 1.880 in poly crys talline powder at room temperature is quite different from the U spectrum. The c oordination number of Gd 3+ is nine with a monocapped square antiprism geom etry. And the stacking effect was observed in the complex. The crystal of the co mplex belongs to triclinic with space group P 1, a=0.9626(4) n m, b=0.9732(4) nm, c=1.1758(5) nm, α=102.45(1)°, β=108.16(1) °, γ=96.68(2)°, V=1.0018(7) nm3, Z=2, D c=1.80 g·cm -3 , μ(MoKα)=33.63 mm -1, F(000)=530, GOF=1.80, R=0.023 and R w=0.027.

The Impact of Organization Structure on Human Resource Management in a Bi-national Organzation A Case Study of Tanzania-Zambia Railway Authority （TAZARA）

This study explores the impact of organization structure on human resource management in a bi-national organization Tanzania-Zambia Railway Authority （TAZARA）. It is a bi-national organization because it is jointly owned and managed by the two contacting states of the United Republic of Tanzania and the Republic of Zambia. Tanzania-Zambia Railway stretches 1,860 meters from the Port of Dares Salaam in East Africa to New Kapiri Mposhi in Zambia. The study seeks to provide answers to such questions as what is an organization structure. Can an organization structure affect human resource management in an organization？ If so how？ What type of organiTation structure can be appropriate for a bi-national organization？ What are the advantages and the limitations of the organization structure designed for TAZARA？ What measures can be taken to deal with the disadvantages？ Organization structure refers to the formal arrangement of tasks, communication, and authority relationships that influence and control how people coordinate and conduct their work （Martin ＆ Fellenz, 2010）. The study was undertaken within phenomenological paradigm due to the nature of the inquiry of the impact of the organization structure on a bi-national organization concerned with the relationships of actors such as governments as both institutions and employers and employees as individuals and groups. Phenomenological paradigm is concerned with the understanding of human behavior from the participants＇ frame of reference. The study was designed as a case study where the researcher explores a phenomenon （case） in this case （ the organization structure） bounded in time and activity （in this case TAZARA as an institution） and collects data using a variety of procedures during a sustained period of time. It was appropriate for exploring, understanding, and obtaining in depth knowledge of understanding the impact of organization structure on a bi-national organization Tanzania-Zambia Railway Authority, which is divided into two regions and the Head office. Both primary and secondary data were collected from the two regions and the Head office. Primary data were collected by focus group discussion, and structured interviews and questionnaires while secondary data were collected by archival method, organization documents, books, and news papers. Data were analyzed using both qualitative and quantitative methods by triangulation techniques. Sample size comprised eight governments and Board of Directors officials, 35 Management officials, 11 trade union officials and 58 focus group members from seven discussions groups, and bring the total to 112. The study revealed that the organization structure has both advantages and limitations. From governments＇ perspective the structure provides the means of maintaining equal commitment, ownership, and management of the organization by the two contracting states, while the business perspective has identified two limitations. First, the three-tier structure is expensive because of duplication of duties. Second, the involvement of government officials in managing the organization brings in government bureaucracy which should be avoided in business due to slow decision making. Efforts to change the structure to make it business, as so far have proved futile due to governments＇ reluctance to refinquish power as this will be seen as reducing their commitment to the organization.

Optimal operation of Internet Data Center with PV and energy storage type of UPS clusters

With the development of green data centers,a large number of Uninterruptible Power Supply(UPS)resources in Internet Data Center(IDC)are becoming idle assets owing to their low utilization rate.The revitalization of these idle UPS resources is an urgent problem that must be addressed.Based on the energy storage type of the UPS(EUPS)and using renewable sources,a solution for IDCs is proposed in this study.Subsequently,an EUPS cluster classification method based on the concept of shared mechanism niche(CSMN)was proposed to effectively solve the EUPS control problem.Accordingly,the classified EUPS aggregation unit was used to determine the optimal operation of the IDC.An IDC cost minimization optimization model was established,and the Quantum Particle Swarm Optimization(QPSO)algorithm was adopted.Finally,the economy and effectiveness of the three-tier optimization framework and model were verified through three case studies.

Three-Tier Knowledge Management System Based on .NET

Three-tier knowledge management system based on .NET architecture is designed according to requirement specification, characteristics of and relationship between enterprise electronic archives and knowledge management. This system using three-tier design based on factory pattern has good encapsulation and portability, with clearer and more concise structure. It degrades the costs of system development and maintenance and upgrades system’s high reusability and development efficiency.

空间光学相机桁架胶接装配技术

研究了一种新型光学相机碳纤维复合材料桁架结构的胶接装配方法。对胶接装配的工装设计、胶黏剂选择、表面处理、胶层控制、装配原则进行了详细的分析。通过制定科学的装配方法和工艺,减小了桁架结构的装配应力,提高了装配精度和稳定性,最后对装配后的桁架结构进行了正弦和随机振动试验。结果表明采用该胶接装配法装配的桁架具有较高的装配精度和稳定性,可为空间光学相机中复合材料桁架结构的装配提供一种崭新的思路和方法。

云南省社区应急能力指标体系构建及评估应用

为准确评估社区应急能力,解决现有指标体系不统一、构成要素不明确及单一评估方法存在模糊性和随机性的问题,引入霍尔三维模型构建社区应急能力指标体系,并选用组合赋权-云模型方法进行评估应用。首先,结合前人文献和法律法规初步确定备选评估指标集,再综合20位专家意见及10个社区调研结果,优化并确定社区应急能力指标体系;其次,基于熵权法和G1法主客观相结合计算指标权重,并构建社区应急能力评估云模型;最后,应用该模型对云南省3个社区应急能力进行评估并与其他评估模型进行比较。结果表明:该指标体系能全面反映社区应急能力现状,其中,应急管理能力、应急处置能力和应急保障能力等是重要构成要素;所构建的评估模型能准确评估社区应急能力,可进一步进行推广和应用。

森林冠层湍流结构的特征研究

使用长白山森林冠层上下得到的湍流及风、温、湿梯度资料，对长白山森林冠层的湍流结构作了较为详细的分析。结果表明，冠层内的风速分布遵循指数规律Ｕ（Ｚ）／Ｕ（ｈ）＝ｅｘｐ［α１（Ｚ／ｈ－１）］，且α１＝２．０５；冠层内的动量交换系数满足指数律：Ｋｍ（Ｚ）／Ｋｍ（ｈ）＝ｅｘｐ［α２（Ｚ／ｈ－１）］，且α２＝５．２；冠层上Ｚ／ｈ＝１．２３处，σｗ／Ｕ＊，σθ／θ＊与稳定度有很好的相关性；冠层上纵向湍流强度ｉｗ明显小于水平方向ｉｕ，ｉｖ，冠层内，由于大的叶面面积指数（ＬＡＩ），以及树冠、地面、树干的共同作用，使得ｉｕ，ｉｖ，ｉｗ十分接近且明显大于冠层上的值。冠层上下的惯性区湍流谱仍可用幂指数律描述，但斜率偏离－２／３方律，尤其在冠层内更为明显，谱曲线出现双峰现象，从资料及局地各向同性分析，冠层下的湍流并不遵从局地各向同性假设和Ｔａｙｌｏｒ冰冻假设。

汤屯高速公路顺层岩质边坡变形机制分析及治理对策研究

通过对汤屯高速公路顺层边坡现场工程地质条件的系统调查,首先对边坡的岩体结构类型及其成因机制、结构面与坡面组合特征进行细致研究,在此基础上通过FLAC3D数值模拟,结合工程地质条件分析,对其变形破坏机制进行深入探讨。研究结果表明,边坡处于滑移弯曲–滑移拉裂复合型滑坡的初始阶段,边坡的变形受层间软弱夹层及岩体结构控制作用明显,坡体中上部块体沿层间软弱夹层产生滑动,受下部岩体约束,在坡体最薄弱部位–开挖面附近产生弯曲变形;受弯曲部位推力作用,第一级边坡碎裂岩体中逐渐产生剪切滑动面,并与弯曲部位岩体中滑移切出面贯通,最终破坏。基于变形机制分析的治理措施将重点放在控制碎裂岩体和潜在剪出口的变形上,监测结果表明,边坡达到稳定性要求。

剪切生热与花岗岩部分熔融——关于喜马拉雅地区逆冲断层与地壳热结构的分析

本文对影响喜马拉雅逆冲断层地区热结构的三种主要热源(断层的摩擦剪切热,地壳的放射性热和上地幔的传导热)的效应进行了计算分析,在计算中考虑了岩石的流变性造成的剪应力和温度的非线性关系及岩石温度到达熔点时的熔解热.结果表明,尽管地壳的放射性热和上地幔的传导热也可能引起地壳中的部分熔融,但此时熔融将从地壳底部开始发生,这与喜马拉雅地区观测到的地质现象不符;在考虑了剪切断层带的剪切热后,熔融将从断层附近开始发生,因此得到了比较符合实际地质现象的结果.

西双版纳望天树种群结构与动态研究

本文采用空间代替时间和相邻格子样方法阐明了望天树种群的结构类型和群落演替模式，结果表明其种群结构类型可分为初始增长型（类型Ｉ），增长型种群前期类型（类型Ⅱ），增长型种群（类型Ⅲ）和稳定性种群（类型Ⅳ）．其群落演替模式遵从类型Ⅰ─类型Ⅱ─类型Ⅲ─类型Ⅳ模式，即具有更新镶嵌和循环的特点．探讨了群落演替过程中伴生种的变化规律，并就望天树种群的合理保护和群落重建提出了建议．

盐胁迫对石蒜叶片形态结构和生理指标的影响

以石蒜为试材,测定了0.1、0.5、1.0mol/L NaCl胁迫下叶片的超氧化物歧化酶(SOD)和过氧化物酶(POD)的活性,可溶性蛋白、不溶性蛋白以及脯氨酸、丙二醛含量等生理指标的动态变化。用石蜡切片法对不同浓度NaCl胁迫后的叶片结构特征作比较,进行其抗盐性分析。结果表明:随NaCl浓度增加,对石蒜形态结构的影响表现在其叶片长度的变化及叶细胞的受损程度等方面;随NaCl浓度的增加和处理时间的延长,SOD和POD活性,不溶性蛋白、脯氨酸含量均呈先升后降趋势;可溶性蛋白呈先降后升趋势;丙二醛含量呈整体上升趋势。石蒜叶片各生理指标的变化通常在NaCl处理后的第7周和第8周为转折点。石蒜对低浓度的NaCl胁迫具有一定的耐受性。

基于Agent的工作流管理系统的研究

基于工作流管理系统自身的特点 ,提出了三种Agent模型 ,并结合实际进行了深入讨论 .给出了Agent应用于工作流管理系统中的集中式和分布式两种体系结构 ,为解决通常工作流管理系统中流程协作性、安全性控制、流程监控等方面的问题提供了一种新的解决方案和思路 .

压电主动元件设计与实验研究

为自适应调节和改善空间结构动力学性能 ,利用压电材料的正逆压电效应 ,研制了一种具有传感和驱动双重功能的压电主动元件。该主动元件由压电驱动器、微位移传感器、压力传感器等组成 ,具有输出和实时检测微位移和力的功能。提出了压电主动元件的设计理论 ,并给出其工作机理及组成结构。针对其关键部件——压电驱动器进行了静态实验研究 ,包括位移输出情况、重复精度和稳定性实验。实验结果表明该驱动器输出位移可达 63 .2 μm、重复精度± 0 .0 5μm、稳定性 <0 .1μm。

一种基于XML的半结构数据的ORDB存储方法

由于半结构数据缺乏类型信息,因而半结构数据服务器中数据的存储策略将是一个十分重要的研究课题。因为只有有效的存储,才能导致有效的索引及查询处理等技术。正是因为如此,关于如何对半结构数据进行有效的存储亦是目前研究的热点问题。论文在对现有的三种存储方法进行分析的基础上,提出并实现了一种XML数据的ORDB存储策略。

低碳热轧钢管中魏氏组织的形成及影响

通过金相组织分析,结合魏氏组织的形成机理,分析探讨了低碳无缝钢管中魏氏组织铁素体的成因及其对力学性能的影响。

原位TiC_p/Fe复合材料的制备工艺优化

采用反应铸造法在工业化生产条件下制备了原位TiCp/Fe复合材料.在保证Ti与C反应质量比为4:1的基础上,通过正交试验设计及金相组织观察和性能测试,研究了不同成分配比和工艺参数对材料组织与性能的影响,优化了该材料的制备工艺.结果表明:C和Ti质量分数增加,TiC颗粒体积分数增加,可提高材料的性能;Si质量分数过高,可降低冲击韧性;反应温度在1600～1700℃范围内,对材料性能影响波动不大;随着保温时间延长,TiC反应合成充分、尺寸会变大.

基于Narx网络模型的系泊缆截断点运动计算

主动式截断混合模型试验技术是一种新兴的海洋工程试验技术,然而由于缆索运动具有较强的非线性特征,时域内系泊缆截断点处的运动往往需要采用数值方法进行迭代求解,运算量十分可观,成为实现主动式混合模型试验技术的障碍。文中提出一种基于Narx网络模型计算时域内缆索截断点处加速度方法,该方法较一般数值方法所需要的计算时间更少且能保证较好的计算精度。