结构稳定性

Based on the systematic study of fault gouge characteristics (such as minerals component, granulometric composition structure and fractal, maturity, present activity and topotaxy by the SEM), a new way using microscopic and quantitative characteristics of fault gouge is put forward to evaluate the aseismatic problem and the fault resistance problem of concealed fault.

基于断层泥的特征（矿物组分、粒度成分结构和分形、成熟度和目前活动度和SEM特征等）的系统研究，探讨和提出了以断层泥的显微和定量特征来评价隐伏断裂的抗震和抗断难题的新思路和方法，并在镇扬大桥工程区域稳定性评价实际应用中取得了良好的效果，这对建在断裂带上的特大型桥梁工程的稳定性评价具有重大意义。

Thermal stability of different lamellar microstructure in TiAl alloys was studied by TEM methods. Thermal stability of lamellar microstructure in TiAl alloys is not only related to the grain size/average interlamellar spacing, but also closely related to interlamellar boundary structure.

本文还用TEM等手段研究了TiAl合金不同片层显微组织热稳定性，发现TiAl合金的片层组织热稳定性不仅与片层晶粒的大小以及片层间距有关，而且还与片层界面的位错结构等因素密切相关。

By dehydrochlorination reaction the poly[(2-methoxyl-5-octyloxy)phenylene vinylene] is synthesized and the material"s structure is characterized by nuclear magnetic resonance spectroscopy, infrared absorption spectrum, ultraviolet and visible spectrophotometry. At the meantime, the fluorescence spectrum is measured and the mechanism of fluorescence occurring is analyzed. Thermal Gravimetric Analyzer"s results show that the MO-PPV"s thermal stability is fine. Also the experiment of resolvable property indicates that the MO-PPV can well dissolve in chloroform. Through analyzing the film"s surface by Metaloscope and Atomic Force Microscope, the good filming is found.

通过脱氯缩合法合成了聚(2-甲氧基-5-辛氧基)对苯乙炔，并分别用核磁共振波谱法、红外吸收光谱法、紫外-可见分光光度法等对其进行了结构表征；测量了样品的荧光光谱，分析了荧光产生的机理；热失重仪分析了材料的热稳定性，研究表明MO-PPV材料具有良好的热稳定性；溶解性实验发现材料在氯仿中溶解性较好；金相显微镜和原子力显微镜研究了薄膜的表面形貌，发现该材料的成膜性良好；材料的导电性研究表明，固体材料在掺杂下才可以表现出导电特性，而配成溶液的材料导电性因溶剂的不同而不同，并随溶解时间的长短发生变化。

Results A good stability can not he obtained with wire osteosynthesis in the treatment of midface fractures.

结果 钢丝骨间结扎不能获得良好的稳定性，而小钛板坚固内固定则可重建面中份骨骼的支柱结构，获得足够的三维稳定性和重建理想的面部外形。

The properties, preparation technique, characterization method, pillaring mechanism and applications of PILM were summarized, and some questions (including thermal stability, and hydro-thermal stability, and pore structure et al) about PILM were pointed out in this paper.

本文首先概述了PILM物化性能、制备技术、表征方法、柱化机理及其应用领域等方面的研究进展，指出了PILM研究中存在的问题(热稳定性，水热稳定性和孔结构等)。

Through simulation of the real process of thomcolumbar burst fracture and use of modem dynamics techniques, the present study was (1) to investigate the kinetic relationship between structural damage and impact energy absorption and dynamics mechanism of thoracolumbar burst fracture by quantitative analysis of various injured segments;(2) to explore the instability mechanism of L1 vertebral burst fracture and its injury threshold by three-dimensional analysis of the injured segment with stereophotogrammetry in combination of transient physical parameters, anatomy and image;(3) to explore the corresponding relationships between impact energy, geometry parameters and biomechanics by geometry and biomechanical analysis of thoracolumbar burst fracture, which may provide an objective standard for evaluation of spinal injury severity and experimental evidence for adoption of biomechanical treatment in clinic;(4) to evaluate the fixation effect of different instruments and the effect of intervertebral bone graft on segment fixation by analysis of the threedimensional stability of different internal fixation instruments and their decompression of the spinal canal, which may provide experimental evidence for therapeutical selection for thoracolumbar burst fracture in future; and finally to investigate the effect of various instrument fixation on dynamical characteristics by comparison and quantitative analysis of frequency and amplitude responses, which may provide certain theories and experimental evidence for application of vibration test to judge the stability of the spine.

本研究从胸腰段脊柱爆裂骨折发生的实际过程出发，以现代动力学检测及计算机多通道高性能数据采集分析系统等高新技术为基础，实时量化分析损伤节段的工程参数，揭示了结构破坏与能量吸收的变化规律，探讨了胸腰段脊柱爆裂骨折的瞬态损伤机制；利用三维立体摄像技术，对不同损伤程度的节段进行三维运动分析，结合瞬态物理参数、影像学和病理解剖，明确了〓椎体爆裂骨折的失稳机制及损伤阈值；通过对胸腰椎爆裂骨折的几何学变化及生物力学分析，明确了撞击能量与几何参数、几何参数与生物力学的相应关系，为评判脊柱损伤程度提供了客观标准，为治疗中采取适宜的生物力学方法提供了实验依据；通过对比分析不同内固定器械的三维稳定性和对椎管的减压作用，评价不同器械的复位固定作用，同时比较椎体间植骨对节段固定作用的影响，为今后临床胸腰段脊柱爆裂骨折的治疗选择提供依据；利用振动测试与分析技术，比较及量化分析了不同致伤状况的频幅响应特征，比较分析了各种器械固定对动力学特性的影响，为今后临床建立基于振动测试与分析技术判断脊柱稳定性的诊断方法，提供了一定的理论和实验依据。

The most distinctive substructural feature of the stress-induced martensite after deformation at the characteristic temperature and in the critical strain range is the presence of the (001)〓 twins. Based on the analysis of the stability and shape memory effect of various kinds of martensite, the concept of stability of deformed stress-induced martensite was proposed and explained by the mechanism for the formation of the (001)〓 twins.

在综合分析各种马氏体的稳定性和记忆效应的基础上，提出了形变应力诱发马氏体稳定性的概念，并以其（001）〓孪晶亚结构的形成机制给以较为圆满的解释。

Finally, based on the geological structure underlain by gravel sand, it calculates the stability factors of Xixipu landslide with the remained slip force method under several water conditions. The results show that the variation of water level in Three Gorge Reservoir has significant influence on the stability of Xixipu landslide. Therefore, great attention should be taken to Xixipu landslide in the prevention design.

根据下伏卵石砂土层的地质结构，对西溪铺滑坡的稳定性进行了评价，评价结果表明库水位的变化对西溪铺滑坡的稳定性有巨大的影响，在滑坡的防治设计中必须引起高度的重视。

After analyzing the structure-stability of tunnel opening, the author brings forward the superficial-stability-analysis method of greened sloping field of tunnel opening, which bases on the root-distributing character and the mechanical root-soil model of herbaceous plants.

在分析洞门结构自身稳定性的基础上，根据植物根系的分布特征，以及草本植物根—土相互作用力学模型，提出了隧道边、仰坡绿化后坡体浅层稳定性的分析方法。

So,in this thesis,with regard to the stability and deformation of composite soil-nailing in soft clay foundation pit, the studies listed below were carried out, considering current research and design status of the soil nailed retaining structure. 1 Based on the use of leading pile with soil nailing protection, studied the work mechanism of mini-pile with composite soil-nailing, the model of stability analysis of the composite soil-nailing is established and examined by analysis engineering case.

因此本文鉴于软粘土地区深基坑工程土钉支护结构的研究及设计现状，在前人研究的基础上，就复合土钉支护软粘土基坑的稳定性和变形展开相应的专题研究，主要完成了以下几个方面的工作： 1针对软土条件超前桩的应用，研究了桩加土钉的复合土钉支护机理，建立了复合土钉支护稳定性分析模型和计算公式，并对工程实例进行计算分析，检验了模型。

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。