Results 21 to 30 of about 5,089,994 (282)
Journal of Biomechanical Science and Engineering, 2009 To get a deeper insight into the factors affecting the vascular hemodynamic, the propagation coefficient (γ) should be calculated. However, results from estimated method of this quantity are conflicting.
Khaled BEN ABDESSALEM +2 more
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Acoustics, 2020 This study extends the second-order attenuation (SOA) model for elastic waves in texture-free inhomogeneous cubic polycrystalline materials with equiaxed grains to textured polycrystals with ellipsoidal grains of arbitrary crystal symmetry.
Gaofeng Sha
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Geochemistry, Geophysics, Geosystems, 2018 New images of shear wave velocity (VS) structure of the crust and uppermost mantle in the Shandong province of China are presented based on inversion of ambient seismic noise data from 47 broadband stations.
Cuilin Li +5 more
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Characterization of soil stiffness anisotropy at small strains based on phase velocities of shear waves measured by novel testing apparatus [PDF]
E3S Web of ConferencesFor the characterization of soil stiffness anisotropy at small strains and the calculation of soil elastic constants derived from the cross-anisotropic model, it is important to obtain stress wave phase velocities of soils in both principal and oblique ...
Liu Junming +2 more
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Dizhen xuebao快速准确地计算走时和射线路径是实现地震成像和反演的关键。在各向异性介质中，地震波的传播速度会随传播方向的变化而变化，这使得求解各向异性条件程函方程时，相速度的精确估计和计算变得非常复杂和困难，进而影响各向异性介质中走时和射线路径的计算精度和效率。为此，提出了一种基于相速度预测的射线追踪方法，该方法根据波的传播规律以及斯奈尔方程，推导出一种相速度预测公式，解决了各向异性条件程函方程中相速度求解困难的问题，实现了快速稳定的射线追踪。数值算例表明，本文所提出的改进算法明显提高了走时计算精度 ...
Zhiyu Zhang, Xue Dong, Yiqun Zhao
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The Repolarization Phase of the Spatial Velocity Electrocardiogram
Japanese Circulation Journal, 1968 The repolarization complex of the spatial velocity electrocardiogram was studied in 502 cases. Normal repolarization was composed of two main deflections, τ1 and τ2, and τ1 was smaller than τ2. Most typically in left ventricular hypertrophy and in left bundle branch block τ1 was smaller and τ2 Was larger than in the normal state.
SANO, TOYOMI +3 more
openaire +3 more sources
Pediatric Blood &Cancer, EarlyView.ABSTRACT Rates of cancer among adolescents and young adults (AYA), age 15–39 years, are increasing. Consequently, radiation oncologists are treating more AYAs who have diagnoses spanning both pediatric and adult practices. Compared to pediatric and older adult patients, AYAs face a unique set of challenges.
Hesham Elhalawani +7 more
wiley +1 more source
Dizhen xuebao, 2019 本文利用布设于陕西及其邻区的喜马拉雅二期流动地震台阵和区内的固定地震台网共计257个台站于2014—2015年记录到的连续波形资料，采用基于图像分析的相速度提取方法，得到了7 185条瑞雷波相速度频散曲线，反演获得了周期为5—40 s的瑞雷波相速度分布图像，其最小分辨率约为20 km。结果表明：各周期瑞雷波相速度图像具有明显的横向不均匀性，能够较好地反映出地壳及上地幔顶部的地质构造特征。周期为5—10 s的瑞雷波相速度分布与地表地质构造密切相关，且高低速异常的分界线与地块边界高度吻合；周期为15 ...
Shaoxing Hui +3 more
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International Journal of Applied Mechanics and Engineering, 2023 This research problem is an investigation of wave propagation in a rotating initially stressed monoclinic piezoelectric thermo-elastic medium under with the effect of a magnetic field.
Anand Kumar YADAV
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Therapeutic Apheresis and Dialysis, EarlyView.ABSTRACT Background Patients with chronic kidney disease undergoing hemodialysis commonly experience reduced physical function, fatigue, poor sleep quality, and impaired health‐related quality of life. Intradialytic exercise has been proposed as a non‐pharmacological strategy to improve these outcomes.
Klebson da Silva Almeida +6 more
wiley +1 more source