期刊文献+
共找到31篇文章
< 1 2 >
每页显示 20 50 100
天体尺度上的重大灾变事件——宇宙在大爆炸中诞生 被引量:4
1
作者 赵君亮 《自然杂志》 北大核心 2011年第4期187-191,共5页
目前关于宇宙起源的主流学说是大爆炸宇宙论——可观测宇宙在一次大爆炸事件中诞生,至今经历了长达130多亿年的演化,期间形成了各种形式的天体和天体系统。因得到若干重要观测事实的支持,基于灾变式事件的大爆炸理论已获得学界的普遍认可。
关键词 大爆炸宇宙学 宇宙膨胀 微波背景辐射 宇宙氦丰度
下载PDF
From Chern-Simon, Holography and Scale Relativity to Dark Energy 被引量:1
2
作者 Mohamed S. El Naschie 《Journal of Applied Mathematics and Physics》 2014年第7期634-638,共5页
Chern-Simon theory and the holographic principle as well as scale relativity are used to find out the exact value of cosmic ordinary and dark energy density. The result agrees completely with previously obtained ones ... Chern-Simon theory and the holographic principle as well as scale relativity are used to find out the exact value of cosmic ordinary and dark energy density. The result agrees completely with previously obtained ones as well as with accurate cosmic measurements. 展开更多
关键词 Holographic Boundary Chern-Simon Theory Dark Energy cosmic expansion Fractal-Cantorian SPACETIME
下载PDF
The Big Bang Influence in a Cosmological Wave Complex
3
作者 Ivan Nilsen 《Journal of High Energy Physics, Gravitation and Cosmology》 CAS 2022年第4期1102-1109,共8页
The Big Bang theory states that the universe was created from pure energy, although matter, in general, is also pure energy and there is no known physical existence that is not pure energy in accordance with the mass-... The Big Bang theory states that the universe was created from pure energy, although matter, in general, is also pure energy and there is no known physical existence that is not pure energy in accordance with the mass-energy equation. All known energy is situated in a field, and it can be questioned whether also the Big Bang was situated in a field in the primordial moment it inflated into the subsequent cosmic expansion that so far lets us observe a 93-billion-light-year-wide spherical volume of the universe. In this study, the Big Bang’s gravitational influence, particularly in the form of an externally radiated gravitational wave, is considered in connection to its situation in a surrounding field with a different expansion rate than itself. The results suggest that the least possible size of the universe can be predicted by the expression of the gravitational wave produced by Big Bang, revealing that the universe has a significantly greater size than the observable, and further that Big Bang might be the production of only one of many cosmic galaxies situated together in a cosmological wave complex (CWC) where the amplitude is self-maintained by inflations. 展开更多
关键词 Gravitational Waves Big Bang INFLATION Cosmological Wave Complex cosmic expansion Dark Energy
下载PDF
关于星系光谱红移的思考 被引量:1
4
作者 郁犁 孙泽信 《科学咨询》 2022年第7期47-49,共3页
本文结合光线构成、星系光谱红移等问题的机理分析,结合造父变星光变过程和其光谱移动的严格对应关系分析,提出基于光行差原理的星系光谱红移并非多普勒红移,并解释了类星体SDSS100+0524大红移成因。论文还提出了实验验证的思路和红移... 本文结合光线构成、星系光谱红移等问题的机理分析,结合造父变星光变过程和其光谱移动的严格对应关系分析,提出基于光行差原理的星系光谱红移并非多普勒红移,并解释了类星体SDSS100+0524大红移成因。论文还提出了实验验证的思路和红移解析分析的研究方向。 展开更多
关键词 光行差 光谱红移 宇宙膨胀
下载PDF
关于宇宙中存在负质量物质和引力波的猜想 被引量:2
5
作者 苏燕飞 《山西师范大学学报(自然科学版)》 2001年第4期25-30,共6页
根据爱因斯坦相对性原理的发展和引力场与电场的类同特点 ,预言了负引力质量物质和引力波存在于宇宙中 ,论证了哈勃定律 ,解释了宇宙膨胀的现象和水星轨道的旋进 .
关键词 万有引力 库仑力 负质量物质 哈勃定律 宇宙定律 引力波 爱因斯坦相对性原理
下载PDF
宇宙膨胀动因的另类物理解释 被引量:1
6
作者 张德荣 《沈阳航空工业学院学报》 2003年第3期69-71,F003,共4页
利用磁流体力学的基本概念 ,试图对宇宙膨胀———总星系扩张的动因 ,提出另类物理解释如下 :磁压是导致磁力线疏散的一种斥力。由于宇宙磁场是冻凝场 ,故当磁力线在空间疏散时 ,必将带着与之冻结的宇宙物质一起在空间疏散 ;从而使宇宙... 利用磁流体力学的基本概念 ,试图对宇宙膨胀———总星系扩张的动因 ,提出另类物理解释如下 :磁压是导致磁力线疏散的一种斥力。由于宇宙磁场是冻凝场 ,故当磁力线在空间疏散时 ,必将带着与之冻结的宇宙物质一起在空间疏散 ;从而使宇宙物质的密度减少 ,各星彼此远离。因此可以认为 ,磁压是宇宙膨胀的主要动因。并就有关问题进行了讨论。 展开更多
关键词 宇宙膨胀 磁压 磁力线 疏散 冻结
下载PDF
太阳系中的宇宙膨胀效应
7
作者 王海 《科技视界》 2017年第9期19-20,共2页
以宇宙时间和空间具有平权性的观点,指出宇宙膨胀是四维时空的膨胀,从而导出太阳系中行星天体轨道半径、运行周期的增长以及地球膨胀等与宇宙年龄的关系,说明太阳系中存在的地日、地月轨道半径距离增加以及地球膨胀等自然现象实质上都... 以宇宙时间和空间具有平权性的观点,指出宇宙膨胀是四维时空的膨胀,从而导出太阳系中行星天体轨道半径、运行周期的增长以及地球膨胀等与宇宙年龄的关系,说明太阳系中存在的地日、地月轨道半径距离增加以及地球膨胀等自然现象实质上都是宇宙膨胀的效应。 展开更多
关键词 太阳系 宇宙膨胀 时空因子 宇宙年龄
下载PDF
空间概念的探讨
8
作者 禹业茂 《广东石油化工学院学报》 2010年第6期61-65,共5页
空间概念是物理学的最基础概念之一,对空间性质的认识随科学发展逐渐清晰,而对空间内在本质的认识却一直是争论与模糊的。对宇宙膨胀、卡西米尔效应、量子场论的真空能量,以及星系的核聚变等进行了综合分析:空间是由物质转化而来,空间... 空间概念是物理学的最基础概念之一,对空间性质的认识随科学发展逐渐清晰,而对空间内在本质的认识却一直是争论与模糊的。对宇宙膨胀、卡西米尔效应、量子场论的真空能量,以及星系的核聚变等进行了综合分析:空间是由物质转化而来,空间与物质是同质的;物质与空间之间存在相互转换关系,物质可转化成空间,空间可转化为物质;空间不是物质的属性,而是物质的另一种特殊形态;空间是客观实在、独立存在的,但其性质不是牛顿绝对空间的几何不变,而是与物质或运动相互作用,与广义相对论的空间几何特性一致。同时又结合宇宙背景辐射光子数密度、核聚变反应的光子产生比率,计算出了物质与空间转换关系的转换系数。 展开更多
关键词 空间 宇宙膨胀 宇宙背景辐射 核反应
下载PDF
宇宙起点半径与演化尺度的计算
9
作者 钱凤仪 《通化师范学院学报》 2021年第4期49-53,共5页
文中基于广义相对论原理和哈勃公式,以及宇宙原始存在物在演化过程中产生了时间这一哲学的研究结论,对宇宙的初始尺度进行了计算,给出宇宙在不同时期对应的尺度计算公式.计算结果表明,宇宙的膨胀速度大于光速.根据狭义相对论直接推导出... 文中基于广义相对论原理和哈勃公式,以及宇宙原始存在物在演化过程中产生了时间这一哲学的研究结论,对宇宙的初始尺度进行了计算,给出宇宙在不同时期对应的尺度计算公式.计算结果表明,宇宙的膨胀速度大于光速.根据狭义相对论直接推导出万有引力公式,发现牛顿万有引力定律中所谓的万有引力常数是与引力源质量成正比的物理量,并不是与引力源质量无关的常数.因此,通过修正万有引力常数可以消除暗物质的存在性问题.研究表明,暗能量现象是宇宙内的物质和有时间的空间与宇宙外的绝对空虚共同作用的结果,暗能量不能作为宇宙演化的起始能量或存在物. 展开更多
关键词 宇宙大爆炸 哈勃 宇宙膨胀 黑洞 宇宙原始尺度
下载PDF
天体脉冲周期计算中的相对论多普勒效应
10
作者 魏江南 景宏华 +2 位作者 李新娟 李世强 王艳海 《辽宁师范大学学报(自然科学版)》 CAS 2003年第4期436-438,共3页
探讨了光学的相对论多普勒效应对于天体脉冲周期观测的影响,并由此出发,用两种不同方法深入讨论一道大家所熟悉的普通物理学习题.
关键词 天体脉冲周期 相对论 多普勒效应 宇宙膨胀 天体物理学
下载PDF
宇宙膨胀理论中的几个问题
11
作者 刘永利 《邢台学院学报》 2003年第4期76-77,共2页
用红移不能准确地描述现在的宇宙,天文观测发现宇宙正在加速膨胀,这预示着暗能量的存在。
关键词 宇宙膨胀 天文观测 红移 退行速度 暗能量
下载PDF
On a Fractal Version of Witten’s M-Theory 被引量:12
12
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
下载PDF
Cosmic Dark Energy Density from Classical Mechanics and Seemingly Redundant Riemannian Finitely Many Tensor Components of Einstein’s General Relativity 被引量:8
13
作者 Mohamed El Naschie 《World Journal of Mechanics》 2014年第6期153-156,共4页
We determine the limit of the ratio formed by the independent components of the Riemann tensor to the non-zero component as space dimensionality tends to infinity and find it to be 12. Subsequently we use this result ... We determine the limit of the ratio formed by the independent components of the Riemann tensor to the non-zero component as space dimensionality tends to infinity and find it to be 12. Subsequently we use this result in conjunction with Newtonian classical mechanics to show that the ordinary measurable cosmic energy density is given by while the dark energy density is obviously the Legendre transformation dual energy E(D) = 1 -?E(O). The result is in complete agreement with the COBE, WMAP and type 1a supernova measurements. 展开更多
关键词 Semi Classical Quantum Systems Dark Energy Accelerated cosmic expansion RIEMANNIAN TENSOR Infinite Dimensional Topology NONLOCAL Elasticity
下载PDF
引力常数变化的地、月系统证据分析及天体膨胀和光谱的非宇宙学红移 被引量:9
14
作者 袁立新 《云南大学学报(自然科学版)》 CAS CSCD 北大核心 2008年第S1期309-319,共11页
依据基本的天体运动学定律,利用地、月轨道变化的生物钟数据及相关资料,经分析、推理,建立起了一个引力常数变化的模型.用此模型对地球、太阳系结构演化,以及光谱的非宇宙学红移进行了分析.并计算了地球、太阳系结构演化过程中的相关物... 依据基本的天体运动学定律,利用地、月轨道变化的生物钟数据及相关资料,经分析、推理,建立起了一个引力常数变化的模型.用此模型对地球、太阳系结构演化,以及光谱的非宇宙学红移进行了分析.并计算了地球、太阳系结构演化过程中的相关物理量;计算了木星相应年代的相关物理量.运用本模型,证明了引力常数减小既产生宇宙的膨胀运动,也产生了光谱的非宇宙学红移和宇宙学红移,光谱的实际红移是这2种红移综合作用的结果.解释了类星体现象.计算结果与实际观测所作对比表明,此模型与实际观测是基本相符的,确定了此模型的合理性.本文通过引力常数减小对天体运动所产生的重要作用,从一个新的角度论证了宇宙的结构和演化,以及宇宙结构的收敛性. 展开更多
关键词 引力常数减小 太阳系和宇宙膨胀 非宇宙学红移 类星体 宇宙的结构
原文传递
From a Dual Einstein-Kaluza Spacetime to ‘tHooft Renormalon and the Reality of Accelerated Cosmic Expansion 被引量:4
15
作者 Mohamed S. El Naschie 《Journal of Modern Physics》 2017年第8期1319-1329,共11页
We use a dual Einstein-Kaluza spacetime to calculate the exact energy density of dark energy and dark matter using a novel topological computation method. Starting from the said spacetime and ‘tHooft’s topological r... We use a dual Einstein-Kaluza spacetime to calculate the exact energy density of dark energy and dark matter using a novel topological computation method. Starting from the said spacetime and ‘tHooft’s topological renormalon as well as the corresponding symmetry group, we show how the zero set quantum particle and the empty set quantum wave interact with the vacuum and give rise to pure dark energy and pure dark matter all along with ordinary energy density of the cosmos. The consistency of the exact calculation and the accurate observations attests to the reality of ‘tHooft’s renormalon dark matter, pure dark energy and accelerated cosmic expansion. 展开更多
关键词 Accelerated cosmic expansion tHooft Renormalon Cantorian SPACETIME DARK Matter Pure DARK ENERGY Topological E-Infinity Computation Zero Set Quantum Particle Empty Set Quantum Wave Hausdorff MASS of Ordinary ENERGY Topological MASS of DARK ENERGY Mixed MASS of DARK Matter and Pure DARK ENERGY A Dual Einstein-Kaluza SPACETIME
下载PDF
Cantorian-Fractal Kinetic Energy and Potential Energy as the Ordinary and Dark Energy Density of the Cosmos Respectively 被引量:4
16
作者 Mohamed S. El Naschie 《Natural Science》 2016年第12期511-540,共30页
In a one-dimension Mauldin-Williams Random Cantor Set Universe, the Sigalotti topological speed of light is  where . It follows then that the corresponding topological acceleration must be a golden mean downscali... In a one-dimension Mauldin-Williams Random Cantor Set Universe, the Sigalotti topological speed of light is  where . It follows then that the corresponding topological acceleration must be a golden mean downscaling of c namely . Since the maximal height in the one-dimensional universe must be where is the unit interval length and note that the topological mass (m) and topological dimension (D) where m = D = 5 are that of the largest unit sphere volume, we can conclude that the potential energy of classical mechanics translates to . Remembering that the kinetic energy is , then by the same logic we see that  when m = 5 is replaced by for reasons which are explained in the main body of the present work. Adding both expressions together, we find Einstein’s maximal energy . As a general conclusion, we note that within high energy cosmology, the sharp distinction between potential energy and kinetic energy of classical mechanics is blurred on the cosmic scale. Apart of being an original contribution, the article presents an almost complete bibliography on the Cantorian-fractal spacetime theory. 展开更多
关键词 Potential Dark Energy Kinetic Ordinary Energy Motion as Illusion Zenonparadoxa E-Infinity Theory Noncommutative Geometry Topological Acceleration Cantorian Universe Accelerated cosmic expansion
下载PDF
On a Quantum Gravity Fractal Spacetime Equation: QRG ≃HD + FG and Its Application to Dark Energy—Accelerated Cosmic Expansion 被引量:1
17
作者 Mohamed S. El Naschie 《Journal of Modern Physics》 2016年第8期729-736,共8页
The paper suggests that quantum relativistic gravity (QRG) is basically a higher dimensionality (HD) simulating relativity and non-classical effects plus a fractal Cantorian spacetime geometry (FG) simulating quantum ... The paper suggests that quantum relativistic gravity (QRG) is basically a higher dimensionality (HD) simulating relativity and non-classical effects plus a fractal Cantorian spacetime geometry (FG) simulating quantum mechanics. This more than just a conceptual equation is illustrated by integer approximation and an exact solution of the dark energy density behind cosmic expansion. 展开更多
关键词 Fractal Cantorian Spacetime Quantum Relativity Superstrings Transfinite Set Theory Extra Spacetime Dimensions Quantum Physics Dark Energy Accelerated cosmic expansion cosmic Topology Hyperbolic Geometry E-Infinity Theory Post Modernistic Physics
下载PDF
Kähler Dark Matter, Dark Energy Cosmic Density and Their Coupling 被引量:2
18
作者 Mohamed S. El Naschie 《Journal of Modern Physics》 2016年第14期1953-1962,共11页
We utilize homology and co-homology of a K3-K&#228;hler manifold as a model for spacetime to derive the cosmic energy density of our universe and subdivide it into its three fundamental constituents, namely: 1) or... We utilize homology and co-homology of a K3-K&#228;hler manifold as a model for spacetime to derive the cosmic energy density of our universe and subdivide it into its three fundamental constituents, namely: 1) ordinary energy;2) pure dark energy and 3) dark matter. In addition, the fundamental coupling of dark matter to pure dark energy is analyzed in detail for the first time. Finally, the so-obtained results are shown to be in astounding agreement with all previous theoretical analysis as well as with actual accurate cosmic measurements. 展开更多
关键词 Kähler Topology Dark Matter E-INFINITY Super Strings Golden Mean Computer Kerr Black Hole Geometry Accelerated cosmic expansion Fractal Cantorian Spacetime
下载PDF
大脑网络的探索进程(二)——进展、思考和挑战 被引量:4
19
作者 方锦清 《自然杂志》 北大核心 2013年第2期135-143,共9页
评论了大脑网络探索的新进展和发展趋势,包括大脑网络的拓扑特性的时频映像,猕猴大脑的长距网络图特点,人与猴大脑功能之异同点,大脑与老年痴呆症之间的关系,大脑网络生长与互联网进化及宇宙膨胀的相似性,网络的网络,以及大脑网络探索... 评论了大脑网络探索的新进展和发展趋势,包括大脑网络的拓扑特性的时频映像,猕猴大脑的长距网络图特点,人与猴大脑功能之异同点,大脑与老年痴呆症之间的关系,大脑网络生长与互联网进化及宇宙膨胀的相似性,网络的网络,以及大脑网络探索中提出的若干值得思考的问题和面临的挑战性课题。 展开更多
关键词 人与猴大脑功能 大脑与老年痴呆 大脑网络与互联网及宇宙网络的相似性 网络的网络 挑战性课题
下载PDF
Cosmic Dark Energy from ‘t Hooft’s Dimensional Regularization and Witten’s Topological Quantum Field Pure Gravity 被引量:1
20
作者 Mohamed S. El Naschie 《Journal of Quantum Information Science》 2014年第2期83-91,共9页
We utilize two different theories to prove that cosmic dark energy density is the complimentary Legendre transformation of ordinary energy and vice versa as given by E(dark) = mc2 (21/22) and E(ordinary) = mc2/22. The... We utilize two different theories to prove that cosmic dark energy density is the complimentary Legendre transformation of ordinary energy and vice versa as given by E(dark) = mc2 (21/22) and E(ordinary) = mc2/22. The first theory used is based on G ‘t Hooft’s remarkably simple renormalization procedure in which a neat mathematical maneuver is introduced via the dimensionality of our four dimensional spacetime. Thus, ‘t Hooft used instead of D = 4 and then took at the end of an intricate and subtle computation the limit to obtain the result while avoiding various problems including the pole singularity at D = 4. Here and in contradistinction to the classical form of dimensional and renormalization we set and do not take the limit where and is the theoretically and experimentally well established Hardy’s generic quantum entanglement. At the end we see that the dark energy density is simply the ratio of and the smooth disentangled D = 4, i.e. (dark) = (4 -k)/4 = 3.8196011/4 = 0.9549150275. Consequently where we have ignored the fine structure details by rounding 21 + k to 21 and 22 + k to 22 in a manner not that much different from of the original form of dimensional regularization theory. The result is subsequently validated by another equally ingenious approach due mainly to E. Witten and his school of topological quantum field theory. We notice that in that theory the local degrees of freedom are zero. Therefore, we are dealing essentially with pure gravity where are the degrees of freedom and is the corresponding dimension. The results and the conclusion of the paper are summarized in Figure 1-3, Table 1 and Flow Chart 1. 展开更多
关键词 Accelerated cosmic expansion 't Hooft-Veltman Dimensional Regularization Wilson RENORMALIZATION PURE GRAVITY Witten’s TOPOLOGICAL Quantum Field E-INFINITY Cantorian Spacetime
下载PDF
上一页 1 2 下一页 到第
使用帮助 返回顶部