力学的

Objective To investigate the mechanical properties of ascending aorta in normal adult humans and different age pigs, and thus to provide essential biomechanical data for the vessels to be anastomosed in pig-to-human cardiac xenografts.

目的 ：探讨正常成人与不同月龄猪升主动脉一维载荷下的力学特性，为猪→人异种心脏移植吻合血管提供必要的生物力学基础。

Through comprehensive comparison,during the growth from 1 age-degree bamboo to 2 age-degree bamboo,density, mechanical strength(except maximum tensile strength etc.),fraction of bundle sheath,cell wall ratio,crystallinity,cellulose content and lignin content increase rate are the greatest.3age-degree bamboo has higher strength,strength and gravity ratio andcrystallinity are the biggest,fraction of parenchyma is small and insect-resistant.2 degree bamboo has the greatest mechanical strength,but its strength andgravity ratio is not the highest and its crystallinity is lower than 3 age-degreebamboo due to its greatest fraction of parenchyma,loss tangent value is thebiggest.Its creep character is not good and is easily eaten by moth.

通过综合比较，竹材从1度竹到2度竹生长过程中，密度、力学强度、纤维束比量、胞壁率、结晶度、纤维素含量、木质素含量等指标增加幅度是最大的。3度竹强度较高，强重比、结晶度最高，薄壁组织含量较小，相对抗虫蛀，材质最好，适合材用。4度竹结晶度下降引起强度的下降，但薄壁组织组织比量最小，相对最抗虫蛀。2度竹力学强度最大，但是强重比并不是最大，结晶度比3度竹低，由于薄壁组织组织比量最大，内耗值最大，蠕变性能较差，同时相对易遭虫蛀。

In order to disclosure new and old concrete bonding mechanics performance and mechanism under high temperature, the paper studies the influence of high temperature on new and old concrete bonding mechanics behavior with two types adherences: bonding first to heating second and heating first to bonding second.

为了揭示高温下新老混凝土粘结的力学性能和粘结机理，本文分先粘结后高温和先高温后粘结两种类型研究了高温对新老混凝土粘结力学性能的影响。

In this paper,the static and dynamic formulas are derived for the calculation of interference fit and analysis of the stress.

本文根据材料力学和弹性力学理论，对电主轴的配合特性进行了分析，分别推导出电主轴在静态和高速运转条件下，主轴过盈量和应力分布的理论公式。

The rock damage model and the damage-coupling model suited to analyze the whole process of water jet breaking rock were established with continuum damage mechanics and micro damage mechanics.

运用连续损伤力学和细观损伤力学理论，建立了适用于水射流破岩全过程分析的岩石损伤模型以及宏细观损伤的耦合模式。

In this paper,so the infheence of the lime-ash and polymer solidified material-SH on the physical and mechanical capability was studied systematically from mechanics strength and deformation characteristic property that provided a basis for application.

本文从力学强度和变形特性两个方面，系统研究了二灰和高分子材料-SH固土剂对滨海盐渍土的物理力学性能的影响，为实际工程提供依据。

The research results indicate that the interface between weld and l2Crl MoV steel is the weakest part of welded joint. However ,the interfacial failure tendency of low match welded joint is less than those of medium and high match welded joint.

试验结果表明，焊前预热250℃，焊后回火750℃×1h，加速模拟运行500h后，高匹配和中匹配接头的力学性能劣化明显，界面蠕变损伤及失效倾向较大；而低匹配接头的力学性能优于高匹配和中匹配接头，界面蠕变损伤较轻，失效倾向较小。

Experiments and calculation has proved the effect of moisture content on longitudinal properties of tracheids cell wall is much less than the effect on macroscopic mechanical properties of wood.

12实验和理论计算均表明，含水率对管胞细胞壁纵向力学性能的影响程度明显小于其对木材宏观力学性能的影响。

The main points are as follows: 1. For the first time, introduced the methods of fracture mechanics and damage mechanics to analyse the deformation machanism of joints and get the damage tensors of rock containing joints.

首先采用断裂力学，损伤力学相结合的方法，分析了节理的变形机制，推出了节理岩体损伤张量，在此基础上编制了弹性损伤有限元程序TWOD。

An experimental study on properties of pit sand concrete containing the phosphorus slag fine powder is presented.

研究了磷渣微细粉山砂混凝土的各项力学性能，试验结果表明将磷渣微细粉用于山砂混凝土可以制备力学性能优良的C60～C80高强混凝土。

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。