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On a Fractal Version of Witten’s M-Theory 被引量:12
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作者 Mohamed S. El Naschie 《International Journal of Astronomy and Astrophysics》 2016年第2期135-144,共10页
Starting from Witten’s eleven dimensional M-theory, the present work develops in an analogous way a corresponding dimensional fractal version where . Subsequently, the new fractal formalism is utilized to determine t... Starting from Witten’s eleven dimensional M-theory, the present work develops in an analogous way a corresponding dimensional fractal version where . Subsequently, the new fractal formalism is utilized to determine the measured ordinary energy density of the cosmos which turns out to be intimately linked to the new theory’s fractal dimension via non-integer irrational Lorentzian-like factor: where is Hardy’s probability of quantum entanglement. Consequently, the energy density is found from a limiting classical kinetic energy to be Here, is ‘tHooft’s renormalon of dimensional regularization. The immediate logical, mathematical and physical implication of this result is that the dark energy density of the cosmos must be in astounding agreement with cosmic measurements and observations. 展开更多
关键词 M-THEORY E-Infinity Theory Hardy’s Quantum Entanglement Transfinite Turing Computer Dark Energy Accelerated Cosmic Expansion Noncommutative geometry Superstring Theory Scale Relativity Cantorian-Fractal Spacetime Witten’s Theory ‘tHooft Renormalon Pure gravity Penrose Tiling
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G&#246;del Is Right: There Is No Quantum Gravity
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作者 Ronald L. Huston 《Journal of Applied Mathematics and Physics》 2018年第5期979-981,共3页
Using two mathematical models, this paper points out fundamental differences between gravity and the other three fundamental forces (strong and weak nuclear forces and electromagnetic forces). These differences make u... Using two mathematical models, this paper points out fundamental differences between gravity and the other three fundamental forces (strong and weak nuclear forces and electromagnetic forces). These differences make untenable a reconciliation between gravity and the other forces. In conclusion, there is no quantum gravity and consequently, no gravitation-like particles. 展开更多
关键词 gravity Quantum gravity geometry
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Complex Riemannian Geometry—Bianchi Identities and Einstein Tensor
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作者 Richard A. Hutchin 《Journal of Modern Physics》 2015年第11期1572-1585,共14页
Riemannian geometry has proved itself to be a useful model of the gravitational phenomena in the universe, but generalizations of it to include other forces have so far not been successful. Here we explore an extensio... Riemannian geometry has proved itself to be a useful model of the gravitational phenomena in the universe, but generalizations of it to include other forces have so far not been successful. Here we explore an extension of Riemannian geometry using a complex Hermitian metric tensor. We find that the standard electromagnetic field naturally appears along with two additional fields, which act as mass and charge sources. A first paper set up the basic geometry and derived the Christoffel symbols plus the E&M field equation. This paper continues development with the generalized Riemann curvature tensor, Bianchi identities and the Einstein tensor, laying the basis for field equations. A final paper will then present the field equations. 展开更多
关键词 Unified Field Theory gravity Electromagnetism COMPLEX RIEMANNIAN geometry RIEMANNIAN geometry
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加权Voronoi图重心在公共设施选址中应用的研究 被引量:3
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作者 庞慧 郑铮 赵巍 《河北建筑工程学院学报》 CAS 2010年第4期100-104,共5页
城市公共设施选址既要充分体现该设施的利用价值,又要减少和避免由于各设施的重复覆盖而造成的资源浪费.为此首先对普通Voronoi图和加权Voronoi图进行了介绍,然后利用层次分析法解决了拥有综合多因素影响的加权Voronoi图的权值确定问题... 城市公共设施选址既要充分体现该设施的利用价值,又要减少和避免由于各设施的重复覆盖而造成的资源浪费.为此首先对普通Voronoi图和加权Voronoi图进行了介绍,然后利用层次分析法解决了拥有综合多因素影响的加权Voronoi图的权值确定问题.一般一个平面图形的重心通常被认为是该区域的平衡位置.所以对于每个公共设施的影响区域进行基于综合因素的加权Voronoi区域划分后只要确定出这个区域的重心位置即可确定该公共设施的最佳选址位置. 展开更多
关键词 计算几何 加权Voronoi图 层次分析法 重心 选址
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广义相对论的推广和应用及量子引力理论 被引量:2
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作者 张一方 《商丘师范学院学报》 CAS 2019年第9期17-23,共7页
首先讨论引力场中的某些效应.其次探索广义相对论与宇宙,其中Riemann几何可以推广到Lobachevsky几何和Calabi-Yau流形等.第三基于广义相对论研究天体演化.第四探讨量子引力理论等.最后讨论某些重要的问题.
关键词 广义相对论 引力理论 宇宙 几何 天体演化 量子引力
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Astronomical Triggers as a Cause of Strong Earthquakes
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作者 Alexander N. Safronov 《International Journal of Geosciences》 CAS 2022年第9期793-829,共37页
The planetary geometries were studied at the moments of 92 strong earthquakes with a magnitude of more than 8 on the Richter scale (R8+) for the period from 1900 to 2011. Three main planetary schemes were specified, n... The planetary geometries were studied at the moments of 92 strong earthquakes with a magnitude of more than 8 on the Richter scale (R8+) for the period from 1900 to 2011. Three main planetary schemes were specified, namely the schemes of the generalized Archimedes lever (gAL) and the Kepler conjunction (gKc), as well as a new geometry of the triangles of the remote signal catcher (cRS). It was discovered 22 gAL, 42 gKc and 28 cRS geometries, which are 23.9%, 45.7%, and 30.4%, respectively, from the total 92 studying cases. It was found that in some earthquakes;the planetary geometries are absolutely identical, which indicates the universality of the mechanism that caused the earthquake. The triggered effect does not depend on the distance between the planets and the mass of the planets, so the mechanism is identified as an inertial gravitational interaction. The triggered effect increases with the multiplicity of the ratio of distances between planets, as well as with pairwise planetary parallelism, which probably indicates about the wave nature of inertial effects. The triggering effect increases with increasing multiplicity of the ratio of distances between planets, as well as with pairwise planetary parallelism, which probably indicates about the wave nature of inertial effects. According to the Archimedes’ lever principle, the Third Law of Motion is changed by adding a few words. It is assumed that inertia is a special case of gravity, namely gravitational self-induction, which really depends, like any self-induction, only on the geometry of the task. 展开更多
关键词 Earthquake Planet geometry Ancient Seismology Archimedes Lever Kepler Conjunction Third Law of Motion INERTIA gravity Wave
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Generalized Uncertainty Relations, Curved Phase-Spaces and Quantum Gravity
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作者 Carlos Castro 《Journal of Applied Mathematics and Physics》 2016年第10期1870-1878,共10页
Modifications of the Weyl-Heisenberg algebra are proposed where the classical limit corresponds to a metric in (curved) momentum spaces. In the simplest scenario, the 2D de Sitter metric of constant curvature in momen... Modifications of the Weyl-Heisenberg algebra are proposed where the classical limit corresponds to a metric in (curved) momentum spaces. In the simplest scenario, the 2D de Sitter metric of constant curvature in momentum space furnishes a hierarchy of modified uncertainty relations leading to a minimum value for the position uncertainty . The first uncertainty relation of this hierarchy has the same functional form as the stringy modified uncertainty relation with a Planck scale minimum value for at . We proceed with a discussion of the most general curved phase space scenario (cotangent bundle of spacetime) and provide the noncommuting phase space coordinates algebra in terms of the symmetric and nonsymmetric metric components of a Hermitian complex metric , such . Yang’s noncommuting phase-space coordinates algebra, combined with the Schrodinger-Robertson inequalities involving angular momentum eigenstates, reveals how a quantized area operator in units of emerges like it occurs in Loop Quantum Gravity (LQG). Some final comments are made about Fedosov deformation quantization, Noncommutative and Nonassociative gravity. 展开更多
关键词 Uncertainty Relations gravity Finsler geometry Born Reciprocity Phase Space
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Spontaneous Quantum Gravity
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作者 Tejinder P. Singh 《Journal of High Energy Physics, Gravitation and Cosmology》 2021年第3期880-905,共26页
This article gives an elementary account of the recently proposed theory of spontaneous quantum gravity. It is argued that a viable quantum theory of gravity should be falsifiable, and hence it should dynamically expl... This article gives an elementary account of the recently proposed theory of spontaneous quantum gravity. It is argued that a viable quantum theory of gravity should be falsifiable, and hence it should dynamically explain the observed absence of quantum superpositions of space-time geometries in its classical limit. 展开更多
关键词 Quantum gravity Trace Dynamics Non-Commutative geometry Spontaneous Localisation General Relativity
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A Classical Field Theory of Gravity and Electromagnetism
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作者 Raymond J. Beach 《Journal of Modern Physics》 2014年第10期928-939,共12页
A classical field theory of gravity and electromagnetism is developed. The starting point of the theory is the Maxwell equations which are directly tied to the Riemann-Christoffel curvature tensor. This is done throug... A classical field theory of gravity and electromagnetism is developed. The starting point of the theory is the Maxwell equations which are directly tied to the Riemann-Christoffel curvature tensor. This is done through the derivatives of the Maxwell tensor which are equated to a vector field ?contracted with the curvature tensor, i.e., . The electromagnetic portion of the theory is shown to be equivalent to the classical Maxwell equations with the addition of a hidden variable. Because the proposed equations describing electromagnetism and gravity differ from the classical Maxwell-Einstein equations, their ability to describe classical physics is shown for several situations by direct calculation. The inclusion of antimatter and its behavior in a gravitational field, and the possibility of particle-like solutions exhibiting quantized charge, mass and angular momentum are discussed. 展开更多
关键词 CLASSICAL Field Theory GRAVITATION and Electromagnetism General RELATIVITY ANTIMATTER ANTIMATTER gravity Hidden Variable Theories RIEMANN geometry
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General teleparallel gravity from Finsler geometry
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作者 Yeheng Tong 《Communications in Theoretical Physics》 SCIE CAS CSCD 2023年第9期104-112,共9页
Riemannian geometry, as a basis for general relativity, can be obtained from the more general Finsler geometry in terms of the Cartan connection and Chern connection, as discussed frequently in the literature. However... Riemannian geometry, as a basis for general relativity, can be obtained from the more general Finsler geometry in terms of the Cartan connection and Chern connection, as discussed frequently in the literature. However, there are other gravity theories that can be made to be equivalent to general relativity but are based on non-Riemannian geometry. Famous examples are the Teleparallel and Symmetric Teleparallel gravity theories. In this paper, we show how to obtain the geometry for Teleparallel gravity from Finsler geometry in terms of a ‘Teleparallel type’ connection. 展开更多
关键词 Finsler geometry teleparallel gravity Finsler connection
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我国生态压力与承载力重心动态演变分析 被引量:1
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作者 杨振 梁小翠 《华中师范大学学报(自然科学版)》 CAS CSCD 北大核心 2011年第1期135-138,144,共5页
人类生态压力与生态承载力在空间分布上存在一定偏差,研究二者的相对变化特征有助于理解和解决当前日趋严峻的区域发展不均等问题.文章在测算我国1980~2005年生态压力和生态承载力的基础上,通过计算生态压力重心和承载力重心坐标及重... 人类生态压力与生态承载力在空间分布上存在一定偏差,研究二者的相对变化特征有助于理解和解决当前日趋严峻的区域发展不均等问题.文章在测算我国1980~2005年生态压力和生态承载力的基础上,通过计算生态压力重心和承载力重心坐标及重心间的空间重叠性与变动一致性指标考察二者的时空演变特征.研究发现:(1)25年来我国生态压力重心变动幅度较大,受到人口与经济变动的强烈牵引;(2)生态承载力重心多分布于内陆地区,与生态压力重心的空间偏离较大;(3)生态压力和承载力的空间偏离是生态服务跨区占用和区域发展不均等的基本成因. 展开更多
关键词 生态压力 生态承载力 几何重心 时空差异 区域不均等
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Charged Noncommutative Wormhole Solutions via Power-Law f(T) Models
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作者 Shamaila Rani Abdul Jawad M.Bilal Amin 《Communications in Theoretical Physics》 SCIE CAS CSCD 2016年第10期411-422,共12页
In this paper,we explore static spherically symmetric charged wormhole solutions in extended teleparallel gravity taking power-law f(T) models.We consider noncommutative geometry under Lorentzian distribution.In order... In this paper,we explore static spherically symmetric charged wormhole solutions in extended teleparallel gravity taking power-law f(T) models.We consider noncommutative geometry under Lorentzian distribution.In order to obtain matter components,we develop field equations using effective energy-momentum tensor for non-diagonal tetrad.We explore solutions by considering various viable power-law f(T) models,which also include teleparallel gravity case.The violation of energy conditions obtain by exotic matter to form wormhole solutions in teleparallel case while,physical acceptable wormhole solutions exist for charged noncommutative wormhole solutions for some cases of power-law models.The effective energy-momentum tensor and charge are responsible for the violation of the energy conditions.Also,we check the equilibrium condition for these solutions.The equilibrium condition meets for the teleparallel case and some power-law solutions while remaining solutions are either in less equilibrium or in disequilibrium situation. 展开更多
关键词 f(T) gravity WORMHOLE Lorentzian distribution noncommutative geometry
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计算几何在重力式结构稳定计算中的应用
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作者 张丽媛 罗少桢 +2 位作者 汤建宏 于忠涛 杨华 《水运工程》 北大核心 2015年第6期168-173,共6页
针对重力式结构设计中进行多荷载工况、多设计方案的稳定性计算时,各种组合情况下的重力作用效应计算费时费力的问题提出基于计算几何学的计算方法,该算法将重力作用效应的计算问题简化。对重力式结构的设计断面,首先判断其凸凹性,然后... 针对重力式结构设计中进行多荷载工况、多设计方案的稳定性计算时,各种组合情况下的重力作用效应计算费时费力的问题提出基于计算几何学的计算方法,该算法将重力作用效应的计算问题简化。对重力式结构的设计断面,首先判断其凸凹性,然后利用水位线将其分解为多个子多边形,再根据子多边形内是否存在凹点计算子多边形面积、质心,最后汇总计算原设计断面的面积、质心和重力作用效应,进而得到稳定性指标。根据该算法编制了一套计算机程序,将其应用于株洲二线船闸项目的闸室计算,得到了良好的效果。 展开更多
关键词 计算几何 重力式结构 稳定性分析 自动化
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Geodesic equation in non-commutative gauge theory of gravity
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作者 Abdellah Touati Slimane Zaim 《Chinese Physics C》 SCIE CAS CSCD 2022年第10期193-206,共14页
In this study,we construct a non-commtative gauge theory of the modified structure of the gravitational field using the Seiberg-Witten map and the general tetrad fields of Schwarzschild space-time to show that the non... In this study,we construct a non-commtative gauge theory of the modified structure of the gravitational field using the Seiberg-Witten map and the general tetrad fields of Schwarzschild space-time to show that the noncommutative geometry removes the singularity at the origin of the black hole,thus obtaining a non-singular Schwarzschild black hole.The geodetic structure of this black hole presents new types of motion next to the event horizon within stable orbits that are not allowed by the ordinary Schwarzschild spacetime.The noncommutative periastron advance of the Mercury orbit is obtained,and with the available experimental data,we find a parameter of non-commutativity on the order of 10^(-25)s·kg^(-1).This result shows that the new fundamental length,√h■,is on the order of 10^(-31)m. 展开更多
关键词 non-commutative geometry gauge gravity Schwarzschild space-time geodesic equation
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重心坐标应用于几何定理的机械化证明
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作者 黄明 《南京航空学院学报》 CSCD 1989年第4期121-124,共4页
用机械化方法证明几何定理,适当选取坐标系是一个关系到问题解决得难易程度的重要步骤。本文是在重心坐标下,用机械化方法证明非平凡几何定理。
关键词 重心坐标 几何定理 机械化理论
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长江三峡巴东复杂斜坡系统成因研究 被引量:19
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作者 刘传正 刘艳辉 连建发 《地质论评》 CAS CSCD 北大核心 2006年第4期510-521,共12页
三峡库区巴东县新城区所在的扇形大斜坡是一个复杂斜坡系统。斜坡后缘边界的挤压变形带是斜坡整体沿其底界面(T1j3—T2b1)之间岩层界面向长江发生重力蠕滑作用的结果,不存在“巴东断裂”问题。斜坡系统内部未发现成规模的褶皱,也不存在... 三峡库区巴东县新城区所在的扇形大斜坡是一个复杂斜坡系统。斜坡后缘边界的挤压变形带是斜坡整体沿其底界面(T1j3—T2b1)之间岩层界面向长江发生重力蠕滑作用的结果,不存在“巴东断裂”问题。斜坡系统内部未发现成规模的褶皱,也不存在数量众多的内动力成因的断裂带。巴东斜坡区浅表生变形破坏类型可概括为侧向拉裂、“雪崩式”垮塌、表层风化、侧向滑移张剪破裂、岩层折断变位、软岩膝折剪破裂和压扭破裂又重胶结7种重力卸荷破坏力学模式。斜坡系统内部发育分期分区(块)滑动(滑坡)现象,但不存在构造地质意义上的“断层”形迹。在地貌形态上,巴东大斜坡被4条冲沟分割成5个斜坡单元。在斜坡地质结构、成因类型与空间分布上,巴东大斜坡可划分为3个层次,即表层崩塌滑坡成因为主的堆积层(第一层次),冲沟分割且浅表生地质形迹发育的层状顺倾的中间基岩层(第二层次)和整体连续顺倾的深层基岩层(第三层次)。分形几何计算证明,巴东大斜坡的地貌形态尚处于侵蚀发育的青(幼)年期。FLAC3D数值模拟发现,在长江侵蚀下切的不同阶段,巴东斜坡体前缘和后缘接近底界面位置塑性变形区分布集中,但不具备沿深层界面发生整体滑动剪出的可能性。基本认识是,“巴东复杂斜坡系统”是在官渡口—东氵襄口向斜南翼(单斜山)的地质背景下,持续经受长江快速侵蚀下切外动力作用,河谷岸坡快速临空导致其自身重力产生强烈的侧向卸荷与滑移等浅表生地质改造作用过程而形成的,可简单地概括为“重力成因论”。 展开更多
关键词 长江三峡 浅表生地质改造 侧向卸荷与滑移作用 变形破坏模式 分形几何FLAC^3D模拟 巴东复杂斜坡系统 重力成因论
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红河断裂带莺歌海段地质构造特征 被引量:14
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作者 孙桂华 彭学超 黄永健 《地质学报》 EI CAS CSCD 北大核心 2013年第2期154-166,共13页
红河入海后的地质构造特征研究是当前红河断裂带研究的薄弱环节。结合莺歌海地区重力和地震资料解释与前人研究成果,系统总结了红河断裂带莺歌海盆地内的几何学、运动学特征,并根据莺歌海盆地沉积中心迁移规律获得了红河断裂带的年代学... 红河入海后的地质构造特征研究是当前红河断裂带研究的薄弱环节。结合莺歌海地区重力和地震资料解释与前人研究成果,系统总结了红河断裂带莺歌海盆地内的几何学、运动学特征,并根据莺歌海盆地沉积中心迁移规律获得了红河断裂带的年代学数据。研究认为:红河断裂带在入海口附近分叉,其中Tien Lang断层折向NE,呈马尾状展布;在莺歌海盆地内红河断裂带分支为A(I号断层)、B、C和D(莺西断层)4条断层,其中A断层是最主要的一条分支断层。莺歌海盆地内的分支断层均呈近NW—SE走向,延伸420~500km,其地震解释剖面上发育的典型花状构造和马尾状Tien Lang断层共同指示该断层具有走滑运动性质;红河断裂带对莺歌海盆地的沉积具有明显的控制作用,盆地沉积中心变化规律揭示红河断裂带在30~15.5Ma期间具有左行走滑运动性质,15.5~5.5Ma期间为左行向右行转换阶段,发生了强烈的构造反转作用,5.5Ma以来具有右行走滑运动特征。 展开更多
关键词 红河断裂带 几何学 运动学 年代学 空间重力异常
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轮轨接触几何关系对比分析 被引量:8
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作者 邢璐璐 董孝卿 付政波 《铁道建筑》 北大核心 2018年第5期111-116,共6页
采用Kalker CONTACT方法计算轮轨接触几何特性,分析对比了LM,LM_A,S1002CN,LM_(B-10),LM_D,XP55车轮踏面与TB 60,60D,60N钢轨廓型匹配的接触几何关系。分析结果表明:相同车轮踏面与TB 60钢轨匹配的名义等效锥度最大,与60D,60N钢轨匹配... 采用Kalker CONTACT方法计算轮轨接触几何特性,分析对比了LM,LM_A,S1002CN,LM_(B-10),LM_D,XP55车轮踏面与TB 60,60D,60N钢轨廓型匹配的接触几何关系。分析结果表明:相同车轮踏面与TB 60钢轨匹配的名义等效锥度最大,与60D,60N钢轨匹配的名义等效锥度较小;LM_A踏面与TB 60钢轨匹配以及LM,S1002CN踏面与60D钢轨匹配时,具有较好的直线运行稳定性和曲线通过性能;LM,LM_A,S1002CN踏面与TB 60钢轨匹配时,车轮回复到对中位置的能力强;车轮踏面与60N钢轨匹配的接触斑分布均匀,直线上的磨耗性能好;LM_D踏面与TB 60,60D,60N钢轨匹配时也具有很好的磨耗性能;车轮踏面与60N钢轨匹配时,曲线通过的磨耗功最大,磨耗严重。 展开更多
关键词 高速铁路 轮轨接触几何 数值分析 等效锥度 最大接触应力 重力刚度 磨耗功
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论21世纪空间时间观念的量子革命 被引量:2
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作者 李玉琼 薛晓舟 《自然辩证法研究》 CSSCI 北大核心 2002年第7期12-14,共3页
本文根据超弦 /M理论和圈量子引力两个方面的重大成就 ,提出和论述了 2 1世纪空间时间观念的量子革命思想 。
关键词 21世纪 空间时间观念 超弦M理论 非对称几何 图量子引力 哲学反思 量子物理学
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YinYang Bipolar Atom—An Eastern Road toward Quantum Gravity 被引量:1
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作者 Wen-Ran Zhang 《Journal of Modern Physics》 2012年第9期1261-1271,共11页
Based on bipolar dynamic logic and bipolar quantum linear algebra, a causal theory of YinYang bipolar atom is intro-duced in a completely background independent geometry that transcends spacetime. The causal theory le... Based on bipolar dynamic logic and bipolar quantum linear algebra, a causal theory of YinYang bipolar atom is intro-duced in a completely background independent geometry that transcends spacetime. The causal theory leads to an equilibrium-based super symmetrical quantum cosmology of negative-positive energies. It is contended that the new theory has opened an Eastern road toward quantum gravity with bipolar logical unifications of particle and wave, matter and antimatter, relativity and quantum entanglement. Information recovery after a black hole is discussed. It is shown that not only can the new theory be applied in physical worlds but also in logical, mental, social and biological worlds. Falsifiability of the theory is discussed. 展开更多
关键词 YinYang BIPOLAR ATOM BIPOLAR geometry QUANTUM Cellular AUTOMATA Matter and ANTIMATTER Information Recovery after a Black Hole Real World QUANTUM gravity
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