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Effects of angular frequency on storage modulus, loss modulus, loss factor and dynamic viscosity! were investigated.

用扩展流变仪测定了PET,PET-GF,PET-GF-EGMA熔体的储能量、损耗量、损耗因子和动态黏度等随角频率的变化规律。

Due to the symmetry of the plate, there are symmetric and antisymmetric mode vibrations with respect to the median plane of the plate.

首先建立了在偏压电场作用下压电介质的运动微分方程,进而根据对称态和反对称态的特点,分别在自由表面电学开路和电学短路情况下得到了Lamb波传播的相速度方程。

Taking the spring of coupled pendulum s as an uniform elastic rod, characteristic equations are derived for symmetric normal mode and antisymmetric modes.

将耦合摆弹簧作为弹性均匀杆,导出了对称简正与反对称简正的本征方程,给出各角频率值的近似式,并进行了讨论

Finaly, we introduce the Bernstein-Kantorovich quasi interpolant and study the approximation equivalent theorem with pointwise modulus (o≤λ≤1 ) in space L[0,1] and approximation equivalent theorem with Ditzian-Totik modulusin space L_[0,1](1 ≤p ≤ω).

最后,引入Bernstein-Kantorovich拟中插式,利用点态光滑ω_~(2r)(0≤λ≤1)讨论了其在L_∞[0,1]空间的逼近等价定理和其在L_p[0,1](1≤p≤∞)空间关于ω_ψ~(2r)的逼近等价定理。

In the third part, the design of the controller is based on sliding mode control theory and the approximation capability of fuzzy systems.

第三部分:考虑到摩擦力、未建动态和干扰对机器人系统的影响,基于滑控制原理并利用糊系统的逼近能力设计控制器,应用李亚普诺夫方法设计自适应律,提出了一种新的基于糊逻辑的自适应糊滑控制方案。

A study was made of the mechanical properties of ordinary Portland cement modified asphalt emulsion concrete,including compressive strength and compressive modulus,flexural strength and flexural modulus.

研究了不同水泥用量对乳化沥青混凝土的抗压强度和抗压回弹量、抗折强度和抗折回弹量等力学参数的影响。

The results show that more modalities can be excited from asymmetric system and that there is little difference between the power flow spectra of rigid raft system and flexible raft system in middle and low bands of frequency, but there is considerable difference at high frequency.

研究结果表明,非对称系统能激励出更多的态;在中低频段弹性浮筏系统和刚性浮筏系统的功率谱没有很大的区别,但是在高频段差别则很明显,浮筏的弹性态起着主要作用;减小隔振器的刚度并适当增加隔振器阻尼不仅可以降低传递到基础的功率谱,同时还可以抑制共振减小冲击。

Vibration Modal analysis and parameters identify is an analysis method which is used in "athwart question" in the Structure Dynamics.

态分析的最终目标是识别出系统的态参数,为结构系统的振动特性分析、振动故障诊断与预报以及结构动力特性的优化设计提供依据。

It can be seen that the bulk modulus depends mainly on electrons per atomic volume and mass density, while covalent structure of chemical bonding and N content make more contribution to theoretical hardness, and appropriate content N—N covalent bonding in the same direction tends to increase the shear modulus of nitrides.

说明在Tc的氮化物中,其体弹量与材料的晶体结构、平均每个原子上的电荷密度和材料的质量密度有关;化学键的共价性结构和氮元素的含量对理论计算硬度有正作用;而剪切量的极大值则与其层状结构及体系中一定量的方向基本一致的N—N键相关。

By testing the free response of MRE, the eigenfrequency and the attenuation factor of the structure were obtained.

实验结果指出,实验结构的无阻尼固有频率和MRE的剪切量随着磁场的增加而增加直到磁饱和;实验结构的阻尼比和MRE的损耗因子随着磁场的增加极缓慢的减小;MRE在磁场作用下,剪切量变化最大为60%。

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I didn't watch TV last night, because it .

昨晚我没有看电视,因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来,在北京的很多小区里,电梯液晶电视被撤了下来。

I'm running my simile to an extreme.

我比喻得过头了。