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| 1 | A comprehensive evaluation framework and a comparative study for human detectors显示文摘 | M.Hussein F.Porikli L.Davis | | 0,,03: | 1 |
| 2 | 根据动测和静力试验确定深基础的承载力——十个实例显示文摘深基础的承载力通常是由静载荷试验确定的。但这种方法费钱费时,而且在一些实际工程中不可能进行。由于这些限制,在大型工程中只对少数几根桩做静载试验,而在小型工程中可能一根也不做。近年来,撞击条件下桩顶的动态测量已被用于估计深基础的承载力。因为快速和费用相对较低,在世界许多国家,这些试验正逐渐成为常规试验。分析和量测技术的不断发展,提高了它们的经济性和可靠性。本文选择了十个对同样的桩分别进行了动测和静力试验的工程实录。这些实录中包括打入桩和钻孔桩。打入桩用柴油锤和空气。蒸汽锤打入。钻孔桩的试验采用专门的加行装置。土质条件包括砂、粉土、粘土、石灰质土和岩石。其结论为,在不同条件下,用桩顶动测成果来确定深基础的静承载力与在各种条件下用静力测试成果相比,其差别在107以内。 | M.Hussein F.Rausche 陈晓平 | 1992 | 土工基础1992,,A10: | 0 |
| 3 | Physical and geometrical parameters of CVBS XIV:the two nearby systems HIP 19206 and HIP 84425显示文摘Data release 2(DR2) from the Gaia mission was of great help in precise determination of fundamental parameters of Close Visual Binary and Multiple Systems(CVBMSs), especially masses of their components, which are crucial parameters in understanding formation and evolution of stars and galaxies. This article presents the complete set of fundamental parameters for two nearby close visual binary systems(CVBSs), which are HIP 19206 and HIP 84425. We utilised a combination of two methods;the first one is Tokovinin's dynamical method to solve the orbit of the system and to estimate orbital elements and the dynamical mass sum, and the second one is Al-Wardat's method for analysing CVBMSs to estimate the physical parameters of the individual components. The latest method employs grids of Kurucz lineblanketed plane parallel model atmospheres to build synthetic Spectral Energy Distributions(SEDs) of the individual components. Trigonometric parallax measurements given by Gaia DR2 and Hipparcos catalogues are used to analyse the two systems. The difference in these measurements yielded slight discrepancies in the fundamental parameters of the individual components, especially masses. So, a new dynamical parallax is suggested in this work based on the most convenient mass sum as given by each of the two methods. The new dynamical parallax for the system HIP 19205 of 22.97±0.95 mas coincides well with the trigonometric one reported recently(in December 2020) by Gaia EDR3 of 22.3689 ± 0.4056 mas. The positions of the components of the two systems on the evolutionary tracks and isochrones are plotted, which suggest that all components are solar-type main sequence stars. Their most probable formation and evolution scenarios are also discussed. | Mashhoor A.Al-Wardat Enas Abu-Alrob Abdallah M.Hussein Mohammad K.Mardini Ali A.Taani Hatem S.Widyan Zahraa T.Yousef Hamid M.Al-Naimiy Nihad A.Yusuf | 2021 | Research in Astronomy and Astrophysics2021,21,7: | 0 |
| 4 | 里奥格兰德裂谷南部地壳结构的地球物理约束显示文摘里奥格兰德裂谷仍有地质活动发生的证据,主要有第四纪断层作用、地震活动和裂谷低速扩张。利用绘制的地壳厚度与地震波速比所生成的约束地壳模型横剖面,来突出里奥格兰德裂谷南部的区域扩张。计算了147个台站的接收函数和它们的叠加,使用的数据包括地球透镜计划美国台阵移动阵列、以前收集的美国西南部数据,并使用克里金插值方法对地壳和速度结果进行了插值。再将上述接收函数结果作为反演密度剖面的一个约束条件,得到了一个新的、优化的重力反演方法。最终,得到了约束地壳模型。该模型显示里奥格兰德裂谷南部地区存在浅层莫霍面(30km),此结果比前人得到的要厚。在盆岭区,里奥格兰德裂谷西部地壳分层,接近大平原的里奥格兰德裂谷东部存在较厚的地壳,且伴有密度大的低速层。我们也发现特拉华盆地表现出显著的地球物理异常,其原因可能是该盆地存在厚的饱和沉积物。考虑到其他研究中并没有发现该区域有深部地幔异常,本文提出裂谷可能是上地幔小尺度对流的结果,并得出里奥格兰德裂谷处于盆岭区和大平原的最小边界处,也可能是板块俯冲的终点。 | L.E.Thompson A.A.Velasco A.Zamora M.Hussein 张晓曼(译) 余庆坤(译) 赵小艳(校) | 2018 | 世界地震译丛2018,49,4: | 0 |
| 5 | Electroexcitation of Low-Lying Particle-Hole RPA States of ^(16)O with WBP Interaction显示文摘The nuclear structure of 16 O is studied in the framework of the particle–hole random phase approximation(ph RPA). The Hamiltonian is diagonalized within a model space with particle orbits {1d5/2,1d3/2, and 2s1/2} and the hole orbits {1p3/2and 1p1/2} using Warburton and Brown interaction WBP. The ph RPA calculations are tested, by comparing the electron scattering form factors with the available experimental data. The results of electron scattering form factors and reduced transition strength for the states: 1-, T = 0(7.116 Me V); 2-, T = 1(12.968 Me V); 2-, T = 1(20.412 Me V); and 3-, T = 0(6.129 Me V) are interpreted in terms of the harmonic-oscillator(HO) wave functions of size parameter b. The occupation probabilities of the single particle and hole orbits are calculated. The spurious states are removed by adding the center of mass(CM) correction to the nuclear Hamiltonian. A comparison with the available experiments data is presented. | Ali H.Taqi R.A.Radhi Adil M.Hussein | 2014 | Communications in Theoretical Physics2014,61,12: | 0 |