Focusing on this problem, a modal parameters identification algorithm based on left matrix fraction description of FRF was proposed.
针对该问题，提出一种基于频响函数左矩阵分式模型的模态参数识别方法。
Considering the feature of left matrix fraction description, this article presents a construction method of the stabilization diagram by principal component analysis (PCA).
针对左矩阵分式模型的特点，给出了一种通过主分量分析(PCA)建立稳定图的方法。
The finite element method is used to analyze the relationship between strength and stress of the particle reinforced iron matrix composites and the shapes, sizes and fraction volume of the particles.
采用有限元方法分析了颗粒增强铁基复合材料强度和应力与颗粒形状、尺寸以及体积分数的关系。
Compared with traditional austempered process, this new method would obtain much finer structure with nearly same volume fraction of retained austenite in matrix and carbon content of austenite.
与传统的等温淬火工艺相比，“两步法”组织得到显著细化，而基体组织中残余奥氏体体积分数及含碳量无明显不同。
To resolve the computational complexity in water quality fraction matrix for complicated water distribution systems, a recursion method was used to obtain the coverage matrix under coverage criteria.
针对复杂管网水质比例矩阵求解困难的问题，利用递归方法求解水质比例矩阵，由此得到给定覆盖标准下的覆盖矩阵。
The effects of volume fraction, cross section shape of fibers and the relative thermal conductivity of fiber and matrix on thermal conductivity of composites are analyzed in this thesis.
本文通过计算结果比较，分析了复合材料体分比、纤维截面形状、纤维与基体的相对导热系数对复合材料整体导热性能的影响。
The results show that the particle shape has greater effect on the stress of particle, the strain of matrix and the ductility of composites than that of the particle size and volume fraction.
结果表明，颗粒形状比颗粒尺寸和颗粒体积分数对材料的应力、应变分布及材料韧性的影响大。
When the mass fraction of the homopolymer in blends reaches 33.3%, the "core-shell" structure, similar to the micelles, can be clearly observed in the polystyrene (PS) matrix.
当均聚物质量分数增大到33.3%时，在聚苯乙烯（PS）连续相中形成了类似胶束的“核-壳”结构。
After welding, a large volume fraction of tiny M6C precipitates in the matrix is discontinuously dispersed in the grain boundaries and twin boundaries, and the original carbides become bigger.
焊后，大量M6C在晶内弥散析出，在晶界和孪晶界上不连续析出，原有的碳化物长大。
After welding, a large volume fraction of tiny M6C precipitates in the matrix is discontinuously dispersed in the grain boundaries and twin boundaries, and the original carbides become bigger.
焊后，大量M6C在晶内弥散析出，在晶界和孪晶界上不连续析出，原有的碳化物长大。
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