力学

The relationship between the Riemannian geometric framework of Lagrange equation and the topology graph representation of classic mechanical systems is discussed.

讨论了经典力学系统中拉格朗日方程的黎曼几何表示和力学系统拓扑图表示之间的关系，作为应用。

He data and information of photomechanics are often represented by optical interferometric 〓ringe patterns. The first major contribution of this dissertation is study on fringe pattern 〓utomatic processing.It is significant in techniques and engineering applications to reduce noise and recovery 〓he phase of interferometric fringe pattern.

光测力学的实验数据和信息，都是用光学干涉条纹图来表示的，因此本文首先侧重于用数字图像处理技术，对光学干涉条纹进行自动处理的方法与技术的应用研究，这对于从光学量进一步获得正确的力学量数据的作用是十分重要的。

In this paper, two assemblies of special test equipments have been designed and fabricated by authors in our laboratory: namely Catalyst Molding Process Analyzer and Catalyst Mechanical Process Tester. These new skills are developed for the dynamic studies on whole mold forming process and crushing process of Fe-Cr WGHS catalyst pellet. Based on the orthogonal experimental design, the effects of some factors during the forming process of solid catalyst, such as predensification proportion, calcination time, calcination temperature and content of graphite on the mechanical strength of catalyst pellets are systematically examined, and the molding conditions have been optimized. Based on the experimental data, the relationship between catalyst density and forming pressure are educed, and the physical significances of some related parameters are described. The parameter of macro scopic elastic moduls has been suggested to character the mechanical properties of molding catalyst. The effects of molding pressure on mechanical properties of catalyst pellets are discussed, and results show that there exists a optimal molding pressure for the ideal mechanical properties: when over-high or over-low pressure is applied, the specific surface area and side crushing strength of catalyst pellets will decreased. The "rebound effect" will be undermined by the unsuitable pressure maintain process, resulting in the apparent decrease of mechanical strength of catalyst pellets.

本研究通过自行设计制造的催化剂模压成型过程分析仪（Catalyst Molding Process Analyzer， CMPA）和催化剂力学性质测试仪（Catalyst Mechanical Properties Tester， CMPT），以Fe-Cr系高温变换催化剂片剂为研究对象，对成型过程和受压破碎过程提供了全过程动态研究的新手段；本研究利用正交实验设计方法考察了固体催化剂成型过程中诸因素（包含预密致比例、煅烧时间、煅烧温度和石墨含量等）对催化剂成型体强度的影响，并对成型条件进行了优化；根据实验结果，关联确定了固体催化剂成型过程中的密度－压力关系式，并对方程中诸因子的物理意义进行了描述；提出了一种利用宏观弹性模量来表征成型催化剂的力学性质的方法；研究讨论了成型压力对催化剂成型体强度性质的影响，结果表明：对于催化剂成型体的强度和比表面性质，成型压力存在着一个最佳值，过高的成型压力会导致比表面积和侧压强度的降低；不适当的成型压力的维持时间会破坏&压力回弹&作用，造成催化剂成型体的机械强度明显降低。

［Objective］To study the biomechanical stability of slidable pedicle screw system with the comparison of slidable pedicle screw system and universal pedicle screw system in intensity,rigidity and other biomechanical functions.

［目的］对滑动椎弓根钉系统与通用椎弓根钉系统在脊柱侧凸固定强度、刚度和稳定性等方面进行生物力学比较，以测试滑动椎弓根螺钉内固定系统稳定性的生物力学性能。

［Objective］To study the biomechanical stability of slidable pedicle screw system with the comparison of slidable pedicle screw system and universal pedicle screw system in intensity,rigidity and other biomechanical functions.［Method］Twelve spinal specimens of the pig were randomly divided into two groups and the schubweg on the vertebra of T12 were measured in different conditions.In the end the intensity and rigidity of two groups were compared which were computed by the schubweg.

［目的］对滑动椎弓根钉系统与通用椎弓根钉系统在脊柱侧凸固定强度、刚度和稳定性等方面进行生物力学比较，以测试滑动椎弓根螺钉内固定系统稳定性的生物力学性能［方法］采用12具猪新鲜脊柱标本，随机分成两组分别测量不同工况下T12椎体的位移，并计算其强度和刚度进行比较。

Objective: To investigate the effects of pharyngeal respiratory pressure on the tissue morphous and mechanical properties of pharyngeal soft tissues such as staphylion, soft palate and cavum nasopharyngeum in obstructive sleep apnea hypopnea syndrome.

目的：研究上气道低阻力咽腔力学环境改变对咽部软组织形态及力学特性的影响。

"Now we can study how molecular structure affects the shape, which affects the mechanical properties, and both of which affect mobility," said study author Subra Suresh of MIT.

&现在我们可以研究分子结构是如何影响细胞形状的，细胞形状又是影响力学特性的。然而，形状和力学特性都会影响物质的流动性，&该研究的发起人、美国麻省理工学院的苏伯拉·苏雷什说。

A new type of shape memory alloy damper was proposed by utilizing both the high damping and recentring features of superelastic SMA wire.

利用奥氏体SMA丝的超弹性和阻尼特性，设计了一种新型的SMA阻尼器，试验研究了该阻尼器在循环荷载作用下的力学性能，建立了基于塑性理论的一维理论模型，并对其力学性能进行了数值模拟。

The mechanical properties ofP/PU SEN increase synergically,compared with thatof composition superposition when PU content is high.

力学性能测试结果表明，在各种交联剂量下，聚丙烯酸丁酯/蓖麻油聚氨酯SEN均在蓖麻油聚氨酯含量较高时力学性能呈协同增加。

Thus the calcium thenardite becomes penetrable porous medium, holding the pervasion and mechanical characteristics that are called solution pervasion and mechanical characteristics, respectively.

由于矿物组分溶解特性的差异，在一定渗透压力作用下，钙芒硝盐岩体内会产生溶解渗透交互促进作用，从而由低渗透介质变为高渗透的多孔介质，其渗透及力学特性受其矿物组分硫酸钠溶解程度的影响极大，这种特性称之为溶解渗透力学特性。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。