力学

Older approaches to biomechanics and orthodontic tooth movement included the implied, intuitive "stick in the mud" model, which was rather effective in explaining traditional Tweed mechanics.

旧办法，生物力学和正畸牙齿移动包括暗示，直观的"大棒在泥"的模式，这是比较有效的解释传统特威德力学。

True stress-strain relations curve were obtained in the experiment above, and the meanings of mechanical behavior and thixotropic strength are analysed.

得到了真实应力－应变关系曲线，分析了其应力－应变关系的力学行为意义和触变应力的力学意义。

Note that fluid mechanics can be further split into fluid statics and fluid dynamics, and is itself a subdiscipline of continuum mechanics.

注意到流体力学可以被更进一步分成流体静力学与流体动力学，并且它是连体力学底下的分支。

In this dissertation, periodic impact motions in vibro-impact systems are studied, and the existence and stability of superharmonic periodic impact motions are obtained. The critical bifurcation parameter intervals of superharmonic periodic impact motions are deduced, and numerical simulations are used to verify the results.

中文题名碰振或约束系统的全局分析及稳定性研究副题名外文题名 Studies on global analysis and stability in vibro-impact or constraint systems 论文作者张彦梅导师陆启韶教授学科专业一般力学与力学基础研究领域\研究方向学位级别博士学位授予单位北京航空航天大学学位授予日期2002 论文页码总数95页关键词碰振系统转子系统多体系统碰撞振动馆藏号BSLW /2003 /O322 /1 本论文讨论了碰撞振动系统的周期碰撞运动，得到了超谐周期碰撞运动的存在性和稳定性，推导出亚谐周期运动的临界分岔参数区间，并利用数值模拟进行验证。

2The fixation with the flexion angle of 90°in the supinator position is adopted if the Jateral side presents, displacement and medial periostenm is broken and the"hinge"of the lateral periosteum remained unbroken.

本研究从生物力学角度探明肱骨髁上部的力学特性，并提出合理的固定方法，为治疗肱骨髁上骨折，预防肘内翻提供了理论依据，具有重要的临床意义。

According to the simulation theory between Structural Mechanics and Optimal Control Theory, the symplectic elastics is built after the symplectic space with the duality variables is introduced into the elastics.

根据结构力学与最优控制理论的模拟理论，将由原变量和其对偶变量组成的辛空间引入到弹性力学，从而使分离变量及辛本征函数展开的直接解析解法得以实施，形成了弹性力学求解辛体系。

In this paper, the effects of processing and heat treatment of terephthalate/polyte-traoxymethylene block copolymer on their dynamic mechanical temperature spectra were studied.

本文首先研究了成型方法和热处理对聚对苯二甲酸乙二酯与聚氧四亚甲基嵌段共聚物动态力学温度谱的影响，结合应力-应变曲线讨论了微相分离与力学性能的关系。

In the thesis, with the background of longtan project, adopt the methods theoretic analysis and intelligent arithmetic to research and discuss. The primary tasks in this thesis are stated as followed:(1)Predigesting rock character of the model of 72# cave, taking into account the major factor of the terrane, according the geologic information, build the numerical value model.

本文以有代表性的龙滩水电站工程边坡岩体为研究对象和工程背景，采用理论分析与反演分析相结合的方法，对岩石的流变性能进行了研究与探讨，主要工作如下：(1)对72#模型试验洞岩层的力学特性进行概化，考虑岩层的主要力学性质，根据地质资料的描述，建立岩体力学特性的地质概化模型。

The influences of different kinds of conducting materials and their contents and different volume of PVC grain on the electrical property,mechanical properties and terrazzo lines of the floor were studied.

采用特殊成型方法，研制类似网络结构的水磨石形式的抗静电地板，研究了多种导电材料及其不同用量对网络地板导电性能、力学性能和地板纹路的影响；研究了PVC颗粒大小对地板的导电性能、力学性能和地板纹路的影响；对体积电阻率曲线用三次方程进行了拟合，得到体积电阻率与含量的函数关系，并发现其具有很好的相关性。

The basic content of this course include mechanics, thermology, optics, electromagnetism, and modern physics, which based on the "University Physics" by Porf.

本课程包括力学、热学、光学、电磁学以及近代物理学，教科书是《大学物理学》第二版（卢德馨，高等教育出版社，面向21世纪课程教材），教学参考书主要包括《大学物理学》（张三慧主编，清华大学出版社），和赵凯华等主编的力学、热学、光学、电磁学系列教材。

By the time of its fall, most of the prisoners were writers who had written against the corruptions of the government.

到它被攻陷的时候，里面多数的犯人是写了反对政府贪污文章的作家。

The most obvious variation to ovum morphological character was that the color was changed from light green to sepiaceous in embryonic development, and all the ovums were almost hatched after 96h.

在胚胎发育过程中卵的形态特征最明显的变化是颜色从淡绿到深褐色，卵在发育96h后卵基本全部孵化。