力学的

In this thesis the dynamic property of viscoelastic damping material was first be explained on the basis of the characteristics of polymer molecular structure. The mathematical models describing the dynamic property of damping material were discussed and the nomogram curve-plotting program of damping property of material was compiled by Visual Basic language.

所以，研究粘弹阻尼结构的动态力学性能，首先要对材料阻尼性能的温度、频率依赖性进行准确的表征，进而才能探讨材料阻尼特性与结构动态力学性能之间的相关关系，以寻求抑制结构振动的内在规律。

The mechanical properties,micromorpholgy microstructure of grain boundary and phase composition of Al_2O_3 composite ceramics were systematically studied ,the effect of additives,the relationship between microstructure and mechanical strength,the sintering mechanism of the material and influence factors of the structure and properties of Al_2O_3 composite ceramics were discussed respectively.

系统研究了氧化铝陶瓷的力学性能、微观形貌、晶界显微结构，并讨论了各添加组分的作用、材料显微结构与力学性能的关系以及材料的烧结机理和影响材料结构与性能的影响因素。

The results showed that the workability of PGM with 13% water content was better, the mechanics indexeal of PGM decreased with the increment of water, and increased with the enhancement of pisolite when the amount of water less than 14% and pisolite less than 35%, moreover, tensile strength of PGM was approximately 40% higher than that of ordinary concrete.

研究表明，对于所研究的豆石型灌浆料，其在13%加水量下具有较好的工作性能；其力学指标随加水量的增大而降低；当加水量小于14%，豆石含量小于35%时，力学指标随豆石掺量的增大而提高。此外，研究还发现，豆石型灌浆料的抗拉强度要比同等级的普通混凝土高40%左右。

The paper describes the characters of earth-overturning- Weightlessness and the latest evidence- polar axis of rotation migration, and earths state, global state of mechanical mutual influence by earth-overturning movement, and enlighten of mechanisms of hydrocarbon migration and reservation, Fracture Formation and distribution, abnormal Phenomena in sedimentology, Ground Stress drastic change, mechanical properties of joint Transformation and modification of existing reservoir.

文章讲述了地球翻转运动"失重"的特征及其存在的最新证据—极地旋转轴偏移；地球翻转运动对地球状态、全球性力学状态的双向影响及对油气运移成藏的机制、裂缝形成与分布规律、异常沉积学现象和地应力剧变、节理力学性质转换和已成油气藏的改造等方面的启迪。

The real borehole axis is not an ideal straight line, but a helical line with arbitrary curvature, so the contact problem between the down-hole string and the borehole face is a kind of arbitrary contact nonlinear mechanics problem, which can not be solved by the common methods from material mechanics and structural mechanics.

实际的井眼轴线不是理想的直线，而是一条任意曲率的空间螺旋线，因此井下管柱和井壁的接触问题是一种随机接触的非线性力学问题，用一般的材料力学和结构力学方法是不能解决这类问题的。

Micstructure and properties were investigated and dertermined. The results show that carbide structural inheritance of high chromium cast iron is obvious after remelt; carbide struc- tural inheritance was reduced with remelt times increasing; insulation can improve the carbide structural inheritance, but the longer insulation time was, the thicker ...

结果表明：高铬白口铸铁中的碳化物经过重熔仍存在明显的遗传现象；随着重熔次数的增加，碳化物组织遗传效应减弱，力学性能下降；保温处理可以改善碳化物的组织遗传性；过长的保温时间导致碳化物变得粗大，高铬白口铸铁的力学性能下降。

In this research, a distributed architechture of Steer-By-Wire system and its control strategies have been provided to realize the "appropriate steer" and "right road sense", a experimental platform of Steer-By-Wire system has been built and the control circuit with FlexRay bus and CAN bus on the base of MC9S12XF has been designed.

在建立转向机构力学模型的基础上，研究转向系统目标转角的控制策略，采用了前馈补偿加位置PID的控制方法，实现了"恰到好处"的转向；在建立方向盘总成力学模型的基础上，研究路感模拟函数得出目标路感，采用电流控制方法，得到了"合适"的路感。

The results show that the amorphous PLGA fiber with porous structure (0.1-1.0 μm) is obtained by diluted solvent spinning method and the mechanical properties is affected by pressure and temperature. Bending strength and shearing strength of the samples increase firstly and then decrease with the increase of molding temperature and pressure. While the molding temperature is 160℃and the pressure is 105MPa, the PLGA materials possess optimal mechanical properties, bending strength, shearing strength and bending modulus 187.3 MPa, 100.0 MPa and 2.5 GPa, respectively. The mild temperature molding PLGA materials are desired to play a grate role in non-bearing internal fixation devices.

研究结果表明：非晶多孔结构的PLGA纤维可通过溶液沉析纺丝的方法获得，其孔径为0.1~1.0μm；压制压力和压制温度对材料的力学性能影响较大，材料的抗弯强度、剪切强度和抗弯模量均随着温度和压力的增大而先增大后降低；在压制压力为105MPa，压制温度为160℃时，试样的力学性能比较理想，此时，其抗弯强度可达到187.3MPa，剪切强度达到100.1MPa，抗弯模量达到2.5GPa，可望作为非承重部位骨折愈合内固定材料。

Based on the similarity theory,mechanical analysis of the launching of ship′s slipway is carried out by means of hydraulic simulation experiment,esp.

依据相似理论，对船舶滑道下水这一复杂力学过程进行了力学分析并应用水力模拟试验的手段进行了探讨性研究，特别是就结构复杂的船架所受的水流绕流阻力的模拟做出实质性的探究。

It is found that,through sliding zone soil mineral component and water-soil interaction analysis,the principle reason of landslide is that coal measure strata turves soil contains certain proportional hydrophilic mineral ,and its mechanical index will fall greatly after water-soil interaction.

以京珠高速粤境北段k18+170~k18+225滑坡为例，研究了煤系地层滑坡机理，通过对滑动带土的矿物组成及其物理力学性质分析，发现该类边坡滑坡的主要原因是煤系地层中的泥炭土含有一定比例的亲水矿物，在水的作用下力学性质发生大幅度降低。

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。