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Tensor and Effective Vector Approach to Gravitational Radiation in the Weak Field Limit
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作者 P. Christillin 《Journal of Modern Physics》 2021年第6期798-805,共8页
The purpose of the present paper is to enquire whether General Relativity (GR) is necessary for the prediction of gravitational waves. It will be shown that in the weak field limit the same predictions come also from ... The purpose of the present paper is to enquire whether General Relativity (GR) is necessary for the prediction of gravitational waves. It will be shown that in the weak field limit the same predictions come also from the treatment of a zero mass, spin 2 gravitational scattering amplitude. This will also justify the simpler effective vector approach of the author, only the angular distribution differing from that of a tensor theory. 展开更多
关键词 Gravitational Waves weak field limit Non GR Approaches
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软弱基底排土场变形破坏治理措施研究 被引量:22
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作者 曹兰柱 李亚雷 +2 位作者 王东 宋子岭 祁利民 《中国安全生产科学技术》 CAS CSCD 北大核心 2015年第8期83-89,共7页
针对软弱基底露天矿排土场普遍存在的变形破坏问题,结合胜利东二露天矿南排土场南帮边坡的工程实际,基于极限平衡理论,给出了通过探槽及滑坡变形反分析综合确定基底赋存条件及抗剪强度指标的方法;提出了对软弱基底排土场的变形治理措施... 针对软弱基底露天矿排土场普遍存在的变形破坏问题,结合胜利东二露天矿南排土场南帮边坡的工程实际,基于极限平衡理论,给出了通过探槽及滑坡变形反分析综合确定基底赋存条件及抗剪强度指标的方法;提出了对软弱基底排土场的变形治理措施;根据已有监测数据,对南帮边坡治理效果进行了评价。结果表明:在实施削坡减载措施后,各地表监测点的累计位移趋于平缓,边坡治理措施效果明显,解决了胜利东二露天矿迫切的安全问题,为同样具有软弱基底的其他露天矿排土场变形及破坏治理提供了指导。 展开更多
关键词 软弱基底 排土场 边坡稳定性 治理措施 极限平衡法 现场监测
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有限重力场中理想Fermi气体的弱简并特性
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作者 付奎 赵升频 《陕西理工学院学报(自然科学版)》 2012年第5期70-73,共4页
研究有限重力场中弱简并理想费米气体的热力学性质。采用Thomas-Fermi半经典近似方法,从有限重力场中理想费米气体的状态密度出发,给出系统的化学势、内能和压强解析表达式,分析重力场对弱简并理想费米气体热力学性质的影响。结果表明,... 研究有限重力场中弱简并理想费米气体的热力学性质。采用Thomas-Fermi半经典近似方法,从有限重力场中理想费米气体的状态密度出发,给出系统的化学势、内能和压强解析表达式,分析重力场对弱简并理想费米气体热力学性质的影响。结果表明,有限重力场的存在使弱简并理想费米气体热力学量出现一个附加的修正项。 展开更多
关键词 弱简并费米气体 有限重力场 量子态密度 热力学量
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Theory of a Mach Effect Thruster I
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作者 Heidi Fearn Adam Zachar +1 位作者 Keith Wanser James Woodward 《Journal of Modern Physics》 2015年第11期1510-1525,共16页
The Mach Effect Thruster (MET) is a propellant—less space drive which uses Mach’s principle to produce thrust in an accelerating material which is undergoing mass—energy fluctuations, [1]-[3]. Mach’s principle is ... The Mach Effect Thruster (MET) is a propellant—less space drive which uses Mach’s principle to produce thrust in an accelerating material which is undergoing mass—energy fluctuations, [1]-[3]. Mach’s principle is a statement that the inertia of a body is the result of the gravitational interaction of the body with the rest of the mass-energy in the universe. The MET device uses electric power of 100 - 200 Watts to operate. The thrust produced by these devices, at the present time, are small on the order of a few micro-Newtons. We give a physical description of the MET device and apparatus for measuring thrusts. Next we explain the basic theory behind the device which involves gravitation and advanced waves to incorporate instantaneous action at a distance. The advanced wave concept is a means to conserve momentum of the system with the universe. There is no momentun violation in this theory. We briefly review absorber theory by summarizing Dirac, Wheeler-Feynman and Hoyle-Narlikar (HN). We show how Woodward’s mass fluctuation formula can be derived from first principles using the HN-theory which is a fully Machian version of Einstein’s relativity. HN-theory reduces to Einstein’s field equations in the limit of smooth fluid distribution of matter and a simple coordinate transformation. 展开更多
关键词 MACH EFFECT Drive Transient Mass Fluctuations weak field limit GRAVITATION Modified (PPN) Parameterized Post NEWTONIAN Approximation Linearized EINSTEIN Equations Gravitoelectromagnetism
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