结构稳定性

The sizes of the self-assembly micelles of the amphiphilic block copolymers and the effects werestudied by dynamic light scattering and UV-visible spectrophotometer. The micelle sizes werelargely influenced bythe hydrophobic chain content in the copolymer, the properties of the solvent and the copolymer concentration in the organic phase. The morphology of the micelles was investigated by transmission electron microscopy. Theresults showed that the micelles appeared spheres with inner core and outer shell. The critical association concentrations were determined by pyrene monomer fluorescence probe technology. The degradability of copolymer was studied by the loss of the intrinsic viscosity in the degradation process. The results indicated that the degradation rate of PECL was slower thanthat of PELLA and PEDLLA. The stability of the copolymer micelle dispersion was examined by measuring the critical flocculation concentration, which gradually decreased with increasing the content of thehydrophobic chain in the copolymer. The rheological results showed thatthe viscosity ofthe micelle dispersion with higher content of PEG segments was firstly decreased and then increased with the increasingthe temperature. Otherwise, the variation of viscosity was irregular. The viscosity of the micelle dispersion increased with the increase of the electrolyte (Na 2SO 4) concentrations. Polymer micelles paclitaxel was prepared by self-emulsification/solvent evaporation method and solid dispersion technique with amphiphilic block polymers as the carrier material.

运用动态光散射和紫外分光光度计研究了两亲性嵌段共聚物自组装胶束的粒径及其影响因素，结果表明，自组装胶束的形成机理受制备方式的控制，胶束的粒径随着共聚物相对分子质量或疏水嵌段相对分子质量和有机相中共聚物浓度的增大而增大，随着有机溶剂的水溶性的增强而减小；采用透射电镜观察胶束的形态结构，发现胶束呈具有核壳结构的均匀球形；采用芘荧光探针法测两亲性嵌段共聚物的临界聚集浓度；通过降解过程中共聚物特性粘度的变化研究两亲性共聚物的降解性能，发现与PELLA和PEDLLA的相比，PECL 降解速率较慢；随着共聚物中疏水嵌段含量的增大，纳米分散液的稳定性逐渐下降；PEG含量高的PEDLLA纳米分散液随着温度的升高，纳米分散液的粘度先下降然后增大，反之，没有规律性，且随着电解质Na 2SO 4浓度的增大，体系粘度增大。

At the same time,the status and development trend of Zhoushan agriculture were analyzed,the relationships among factors inside agricultural industry structure were anatomized by combining with qualitative analysis.

农业产业结构是一个巨大而复杂的系统，影响其结构功能发挥和整体稳定性的因素多且不确定。

As the heart of TWT,the structure stability of grided electron gun directly affect pulse output performance of TWT,and the structural reliability under vibration stress are especial-ly important for today's manufacturers.

栅控电子枪作为行波管的&心脏&，其结构的稳定性直接影响着管的脉冲输出性能，特别是在振动应力下的结构可靠性更是当今生产单位关注的重点。

In short, this study has systematically researched the mechanical properties of rockmass structural plane by employing new theories and methods, and has made creativeachievements in controlling rock mass structural plane and raising the stability ofunderground stopes and tunnels. It is of great referential value for the design,construction and production of rock mass works, and so is it for enterprises in raisingeconomic benefits and ensuring production safety.

总之，本文采用新理论、新方法，系统地研究了岩体结构面的力学特征，对控制岩体结构面的方法、手段和措施及提高地下采场、巷道的稳定性等方面的研究取得了创造性成果，本文对解决岩体工程的设计、施工和生产中存在的问题，提高企业经济效益和确保生产安全等都具有十分重大的意义。

It is used on baffle plate, with rectangular structure, which strengthen the stability of upper and lower layers to avoid the damage to clay body.

用于模底板上、下码垛，结构采用矩形结构，增强了上下层的稳定性，防止对坯体损伤。

The Birmingham hip-resurfacing system, manufactured by the Orthopaedic Reconstruction Division of Smith %26amp; Nephew is a smooth chrome-cobalt ball-and-socket joint that preserves more of the patient s natural bone structures and stability, covering the joint s surfaces with an all-metal implant that more closely resembles a tooth cap than a hip implant.

Birmingham臀部重塑系统是由Smith %26amp； Nephew公司(Memphis， TN， USA)的整型外科重建分部制造的，是一种光滑的铬钴球型套筒关节连接装置，能够保留患者自然骨骼结构和稳定性，全金属移植物覆盖关节表面，更象一个牙齿帽状结构而不是一个臀部移植物。

In order to study the dynamic and instability rule and gain a damping evaluation method according to the test result, damping research ways of several foreign and domestic foil bearing types were compared. The interaction among cells was considered based on the approach of separating damping from stiffness. An effective damping evaluation method was developed based on the energy dissipation method. The structural damping of two-layer free plate foil bearing was analyzed on the basis of energy dissipation method.

为了更好地研究箔片轴承的动特性和稳定性，得出与实验结果相符合的评价方法，首先对国内外几种有关箔片轴承库仑阻尼的研究方法进行了比较，根据阻尼和刚度分离评估的思想，考虑箔片之间和箔片单元之间的相互作用，基于能量耗散的思想提出了一种有效的箔片轴承阻尼评估方法，最后对双层同向自由平箔结构箔片轴承的结构阻尼进行了详细分析和数值比较。

In this project, the selection criteria of matrix and reinforcement for obtaining composites with high strength and toughness are determined. The as-cast and aged microstructures of composites reinforced with particles of different strength are observed, and their metallurgical conditions and stabilization mechanisms are analyzed. The aging precipitation behaviors and mechanisms are studied. Some characteristics of nano-materials (micro-distortion areas) are found in 150nm- Al2O3p/Al composites and their formation mechanisms are expatiated. The "flexible" restriction to the deformation of the matrix by low strength AlN particle is observed by in-situ TEM and SEM techniques, and the mechanisms of its resist on cracks propagation and its contribution to composite strength are revealed. The high temperature deformation behaviors of Al2O3p/Al composites are studied. A rare-earth coating is established on sub-micron Al2O3 particles, leading to an improvement in wettability between coated Al2O3 and liquid aluminum and a decrease in infiltration pressure. The strength and ductility of coated particles reinforced composite are also increased. The interfacial characteristics, bonding structures and their formation mechanisms are studied, and the crystal orientation relationships between reinforcement particles and aluminum matrix are investigated. Finally a lighter composite with better balance of strength and damping properties is reinforced with hollow ceramic microballoons of ultra-lower strength.

本项目发现了获得高强度和高韧性复合材料的基体、增强体选择依据；观察了各种强度质点增强复合材料的铸态和时效态微观组织，分析其微观结构形成的金属学条件及稳定性机理，研究了其时效析出规律和时效机制，发现了150nmAl2O3颗粒增强铝基复合材料基体中的纳米材料特征，并解释了其形成机理；利用TEM和SEM动态拉伸技术发现了低强度质点AlN颗粒对变形协调的&柔性强化&机制，揭示了其对裂纹扩展的阻碍作用和对复合材料高强度的贡献；研究了中强度质点的Al2O3颗粒增强铝基复合材料的高温变形行为，并对其进行了稀土界面层设计与制备，改善了颗粒与铝合金之间的界面润湿性，降低了复合材料铸造渗透压力，提高了复合材料的强、韧性；研究了多种复合材料界面结构及形成机理，确定了增强体与基体之间的界面结合机制，分析了复合材料界面处的晶体学位向关系；最后制备了含微孔的中空型陶瓷颗粒增强的特种复合材料，得到了强度和阻尼综合性能较好的轻质复合材料。

The design of the leads unit, low thermal resistance and high electrical isolation heat intercept connection, stability of HTS current leads, optimum design of conduction cooled current leads is analyzed in detail.

对引线单元的结构设计、引线的导热绝缘冷却结构、稳定性等问题，以及传导冷却的铜电流引线优化设计进行了详细分析和计算。

A Use of round bamboo columns and trussed rafters as main load bearing element,Use of split bamboo grids/chicken mesh and plastered with cement mortar to act as shear walls for transmitting wind loads and to provide overall stability to the structure, Application of appropriate preservative treatment of bamboo depending on the degree of hazard and service conditions, Use of BMB gussets in combination with mild steel bolts for load bearing joints in roofing structure, and Use of BMCS as roof claddings.

1原竹的利用和构架椽子作为主要的承载元素；(2)劈蔑竹和竹片胶合作为剪切壁，它能起到透风的作用，并能为其结构提供整体的稳定性；(3)根据危害和公共条件的程度作适当的竹子防腐处理；(4)在屋顶结构上，用于承载的接合点与软钢螺丝相结用于竹子的三角架；(5)竹席皱纹片用于顶部的包层。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。