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- modulus to density ratio 模量-密度比
- Magnesium composites, possessing high strength to density ratios, stiffness to density ratios, excellent mechanical and physical properties, are ideal materials for defense high-tech fields. 镁合金材料有高的比强度、比刚度,优异的阻尼减震、电磁屏蔽等性能,是高新技术行业的理想材料之一。
- The analysis indicates that the maximum deflection is directly proportional to density and the square of span, and inversely proportional to stress, but independent of diameter and elastic modulus. 分析结果表明:由于丝线长径比很大,丝线的最大挠度跟密度以及跨度的平方成正比,与所受的应力成反比,而同丝线的直径的具体数值和材料的刚度无关。
- The influence of density ratio on the characteristic frequency of coherent structure on the centreline of low Re number free round jet flow has been investigated with Dual PDA. 采用激光粒子动态分析仪研究了低雷诺数时密度比对自由圆射流近喷嘴区轴线相干结构特征频率的影响。
- Cumulative incidence ratio (CIR), incidence density ratio (IDR)and incidence odds ratio(IOR)can be calculated respectively in cohort study according to various study designs. 根据不同的研究设计,在队列研究中可分别估计累积发病率比(CIR)、发病密度比(IDR)和发病比值(IOR)。
- The nomograph in relation of freezing modulus to diffrent technological factors has been built. 在此基础上,建立起表征各因素与铸件凝固模数关系的诺谟图。
- The strain energy density ratio criterion for predicting cracking direction in composite materials is proposed. The Tsai-Hill criterion and Norris criterion of composite materials are extended to predict the cracking direction in compsites. 本文提出预测复合材料中裂纹方向的比应变能密度准则;并将Tsai-Hill与Norris准则扩展来预测复合材料中的开裂方向.
- An investigation was conducted to explore the influence of density ratio and velocity ratio of mainstream/injectant upon the cooling effect of flat plane film using heat-mass transfer analogy. 摘要采用传热传质类比的方法研究主射流密度差和速度比对单排孔平板气膜冷却效率的影响。
- Hounsfield unit alues were used to assign permeability alues as well as modulus to the finite element model before analyses. 在分析之前,我们用亨斯菲尔德单位标定了这个有限元模型的渗透参数及其绝对值。
- Environmental-temperature variations contribute to uneven air pressures due to density variations of the air in the bellows. 环境温度的变化将引起波纹管内空气密度的变化,造成气体压力不稳定。
- ratio of tension modulus to compression modulus 拉压模量比
- Polarity that is extreme is held not only in sound tone and movement but also in relation to density. 极端极性,不仅在声音、音调和运动中持有,而且还在致密的关系中持有。
- How much do all these figures stack up to? 这些数字的总和是多少?
- Comparison of nylon6/clay nanocomposites and unfilled nylon 6 indicated that the supplement of 5 wt % organoclay in the dry nylon 6 can enhance the Young's modulus to 32 %. 比较纯尼龙 6与尼龙 6奈米复合材料,我们发现在乾的尼龙 6试片中,添加 5%25奈米黏土,杨氏系数则提升了 32 %25。
- There was a long lag in forwarding mail to us. 转寄给我们的邮件晚了很久才拿到。
- Foreign nationals were asked to leave the country. 外国侨民被要求离开该国。
- A country must have the will to repel any invader. 一个国家得有决心击退任何入侵者。
- Swimming is the best way to tone up your body. 游泳是健体强身的最好方法。
- Model of porosity can be established according to density of framework of rock, density of rock and density of fluid in rock. 由骨架密度、体积密度、流体密度联合建立孔隙度解释模型。
- They denounced him to the police as a criminal. 他们向警方告发他是罪犯。