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测量重力加速度的一种新方法 被引量:7
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作者 李应发 《贵州师范大学学报(自然科学版)》 CAS 2012年第5期76-79,共4页
重力加速度的测量作为普通物理经典实验,在普通物理实验中常用单摆法或自由落体运动法来测量。本文提出一种新的测量重力加速度的方法——用弦振动测当地重力加速度,并对测量原理公式进行较为详细的推导,用测量结果与理论值及单摆法测... 重力加速度的测量作为普通物理经典实验,在普通物理实验中常用单摆法或自由落体运动法来测量。本文提出一种新的测量重力加速度的方法——用弦振动测当地重力加速度,并对测量原理公式进行较为详细的推导,用测量结果与理论值及单摆法测量值进行比较,得出用弦振动测当地重力加速度也比较准确。 展开更多
关键词 弦振动 重力加速度 测量
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高压气井生产管柱横向振动特性分析 被引量:6
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作者 樊洪海 杨行 +4 位作者 王宇 彭齐 马光曦 赖敏斌 邓嵩 《石油机械》 2015年第3期88-91,95,共5页
高压气井生产管柱内流体的流动会诱发管柱振动,管柱振动会导致其疲劳、磨损甚至破裂,影响气井正常生产。结合油田现场实际,在考虑管柱重力的情况下,研究了高压气井生产管柱的横向振动特性。运用哈密顿原理,建立了包含生产管柱轴向力、... 高压气井生产管柱内流体的流动会诱发管柱振动,管柱振动会导致其疲劳、磨损甚至破裂,影响气井正常生产。结合油田现场实际,在考虑管柱重力的情况下,研究了高压气井生产管柱的横向振动特性。运用哈密顿原理,建立了包含生产管柱轴向力、管内流体流速和管内外流体压力等因素的生产管柱横向振动模型。运用伽辽金方法求解模型,计算并讨论了管柱重力、气井产量、井底压力和管柱底端轴向力等参数对油管振动频率及稳定性的影响。研究结果表明,管柱重力是生产管柱振动分析中不可忽略的因素;生产管柱的振动频率随着产量、井底压力以及轴向压力的增大而降低,其中井底压力和轴向压力对管柱振动频率的影响较大,产量的影响较小。 展开更多
关键词 管柱重力 高压气井 横向振动 哈密顿原理 伽辽金法 振动频率
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Cosmic String Theory: Gravity and Tension
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作者 Greg Poole 《Journal of High Energy Physics, Gravitation and Cosmology》 2018年第2期312-322,共11页
Planets are interconnected via magnetic field lines, which allow flux transfer events. In this paper, a thought experiment is performed whereby the Sun and planets are visualized as a violin with magnetic field lines ... Planets are interconnected via magnetic field lines, which allow flux transfer events. In this paper, a thought experiment is performed whereby the Sun and planets are visualized as a violin with magnetic field lines analogous to strings of the violin. Frequency calculations for vibrating strings between the Earth and Sun compare favorably with measured satellite data for flux transfer events. Ideal Schumann Resonance was calculated using speed of light, diameter of the Earth and Earth’s gravity for tension. The force of attraction and repulsion of magnets is analogous to tension and compression resulting from tremendously low frequency (TLF) electromechanical waves. Gravity waves are thus theorized as mechanical waves brought about by the tension of electron strings, which also act dually as electromagnetic waves. Future harmonic analysis of flux transfer wave forms for each planet would add credence to the string theory as the theory of everything. 展开更多
关键词 FLUX Transfer EVENTS gravity gravity Wave string THEORY Schumann Resonance THEORY of Everything
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Empirical Relations about the Number of Dimensions in Theoretical Physics with the Concept of Common and Unshared Dimensions 被引量:1
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作者 Tomofumi Miyashita 《Journal of Modern Physics》 2010年第2期147-149,共3页
How many dimensions are there in the universe? Currently, there is confusion about the number of dimensions in the universe. Empirical relations about the number of dimensions in theoretical physics with the concept o... How many dimensions are there in the universe? Currently, there is confusion about the number of dimensions in the universe. Empirical relations about the number of dimensions in theoretical physics with the concept of common space- time 4 dimensions and unshared dimensions are described in this report. 展开更多
关键词 KALUZA-KLEIN SUPERstring Super gravity NAMBU string Unshared DIMENSIONS
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弦宇宙中的相变动力学模型 被引量:2
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作者 颜骏 陶必友 《四川师范大学学报(自然科学版)》 CAS CSCD 北大核心 2007年第2期208-211,共4页
研究了弦宇宙中的相变动力学模型,分析了极早期宇宙中的超弦相变和QCD相变.另外,计算了标度因子的膨胀比和弦耦合常数的变化比.
关键词 弦引力 宇宙学 相变
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On Approximating Fermion Masses in Terms of Stationary Super-String States
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作者 Joseph Towe 《Journal of Modern Physics》 2013年第4期551-554,共4页
AdS/CFT correspondence is adopted and fermion masses are modeled as analogues of Weyl curvature states, which occur by hypothesis when closed spin-2 strings sweep out closed world tubes. Admissible curvature states ar... AdS/CFT correspondence is adopted and fermion masses are modeled as analogues of Weyl curvature states, which occur by hypothesis when closed spin-2 strings sweep out closed world tubes. Admissible curvature states are established by gauge invariance and fundamental mass is attributed to admissible curvature. A consequent spectrum of masses forms an SU(3) symmetry that is invariant under appropriate realizations of the SUGRA GUT interaction. Finally the spin-h/2 nature of the masses that are attributed to curvature emerges as a necessary condition for the relevant SUGRA GUT realizations. Calibration of the proposed model reveals a spectrum of fermion masses that corresponds approximately to observation. Moreover, the proposed model predicts a new quark that is characterized by I3 = -1/2 and by a mass of about 30 GeV/c2. 展开更多
关键词 string THEORY CONFORMAL Field THEORY QUARKS Super-gravity
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The Basic Idea behind the Relativistic and the Quantum Concepts
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作者 Ahmed Isam 《Journal of Modern Physics》 2016年第1期139-144,共6页
A new aspect of unification is presented in this paper. This aspect depends on two postulates of our recent theory concerning light propagation in a specific medium. The special theory of relativity is demonstrated as... A new aspect of unification is presented in this paper. This aspect depends on two postulates of our recent theory concerning light propagation in a specific medium. The special theory of relativity is demonstrated as a reflection of our first postulate, regarding the existence of multiple, equivalent rest frames in our medium. The second postulate is concerned with energy forms in nature, and it deals with the quantum behavior of light and wave behavior of matter. By using this postulate, we are able to justify the existence of these two phenomena. As a consequence of this, gravity as described by general relativity is unified as a background-independent interaction under the same postulate. 展开更多
关键词 Sama Aether Theory Theory of Relativity Quantum Theory Light Matter Waves gravity Rest Motion string Theory Discrete Space
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What Gravity Is: Alzofon-Ionescu Theory beyond Newton, Einstein, Quantum/Entropy Gravity, etc. A Virequest Project Proposal
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作者 Lucian Miti Ionescu 《Journal of High Energy Physics, Gravitation and Cosmology》 2021年第3期1182-1189,共8页
Gravity is not a fundamental force;in a nut-shell, it is the result of a non-commutative interaction of the “electric” (<i>i.e.</i> Coulomb type) due to fractional charges of the proton and neutron in &l... Gravity is not a fundamental force;in a nut-shell, it is the result of a non-commutative interaction of the “electric” (<i>i.e.</i> Coulomb type) due to fractional charges of the proton and neutron in <i>U</i>(2)-gauge theory, but which have no structure in <i>U</i>(1)-gauge theory, being neutral in itself (neutron), or when compensated by the electronic cloud (proton). This is no longer true at the <i>SU</i>(2) Electroweak Theory level, once spherical 3D-symmetry is broken to a finite Platonic group of symmetry within it Γ → <i>SU</i>(2). The fine splitting of energy levels due to the quark structure (frame basis in <i>SU</i>(2)) of the electric charge can be experimentally controlled using a MASER to invert the population and orient the nuclei the right way to reduce and turn off Gravity. 展开更多
关键词 Quantum gravity string Theory Standard Model
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Superunification
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作者 Joseph Towe 《Journal of Modern Physics》 2015年第2期106-110,共5页
Fermion mass is modeled as an analogue of Weyl curvature, which by hypothesis emerges when closed, spin-2 strings sweep out closed world tubes. Second order curvature classes result when closed world tubes circulate a... Fermion mass is modeled as an analogue of Weyl curvature, which by hypothesis emerges when closed, spin-2 strings sweep out closed world tubes. Second order curvature classes result when closed world tubes circulate and themselves sweep out closed tubes etc. Gauge invariance distinguishes admissible curvature classes from the larger set that would constitute an infinite continuum of possibilities. Admissible curvature classes account for known quark masses and predict a new quark of mass 30 GeV/c2. Super-symmetric interactions among prescribed fermions and super-partners conserve electrical charge, I3, color and generation and are therefore regarded by hypothesis as preserving a minimal irreducible representation of a super-symmetric SU(5). 展开更多
关键词 string THEORY CONFORMAL FIELD THEORY QUARKS Super-gravity
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超弦理论的几个方向 被引量:1
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作者 李淼 《科技导报》 CAS CSCD 2004年第11期16-19,共4页
简述目前超弦理论中比较受到研究者较多关注的几个方向,特别是超弦宇宙学以及观测宇宙学的最新进展对理论提出的挑战。
关键词 超弦理论 超弦宇宙学 宇宙观测 量子引力理论 快子 不稳定膜
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第六讲 超弦理论与宇宙学的挑战 被引量:1
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作者 李淼 《物理》 CAS 北大核心 2005年第9期643-647,共5页
超弦理论从根本上改变了人们对时空的看法,时空在弦论中只是一种宏观体现.弦论中的非经典时空影响早期宇宙的发展,在一些观测宇宙学的实验中人们也许会发现弦论的效应,例如微波背景辐射的功率谱的反常.最近发现的暗能量也对弦论宇宙学... 超弦理论从根本上改变了人们对时空的看法,时空在弦论中只是一种宏观体现.弦论中的非经典时空影响早期宇宙的发展,在一些观测宇宙学的实验中人们也许会发现弦论的效应,例如微波背景辐射的功率谱的反常.最近发现的暗能量也对弦论宇宙学提出了挑战. 展开更多
关键词 弦论 量子引力 暴涨宇宙 暗能量 观测宇宙学 超弦理论 微波背景辐射 早期宇宙 时空 非经典
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彩虹黑弦的热力学性质(英文)
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作者 王鹏 魏欣 《四川大学学报(自然科学版)》 CAS CSCD 北大核心 2019年第2期285-289,共5页
双重相对论(DSR)是描述平直时空中的量子引力的一个有效模型.当试图将该模型纳入到弯曲时空中考虑时,一种被称为"彩虹引力"的理论可帮助实现这一推广,此时背景时空依赖于探测粒子的能量.事实上受粒子能量影响的度规的形式依... 双重相对论(DSR)是描述平直时空中的量子引力的一个有效模型.当试图将该模型纳入到弯曲时空中考虑时,一种被称为"彩虹引力"的理论可帮助实现这一推广,此时背景时空依赖于探测粒子的能量.事实上受粒子能量影响的度规的形式依赖于正交系的选取.本文主要考虑了自由落体参考系下的彩虹静态柱对称黑洞(彩虹黑弦).得到了取一阶近似的彩虹黑弦的霍金温度和熵,这种修正来源于考虑的彩虹引力效应. 展开更多
关键词 黑洞热力学 黑弦 双重狭义相对论 彩虹引力
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井洞相连的串珠状缝洞型油藏试井分析方法 被引量:8
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作者 魏操 程时清 +3 位作者 李宗泽 宋佳忆 汪洋 吴嘉鑫 《油气地质与采收率》 CAS CSCD 北大核心 2022年第6期85-94,共10页
顺北油田包含溶洞、高角度裂缝、溶蚀孔洞和岩石基质4种储集介质,溶洞与高角度裂缝串联形成垂向串珠状缝洞体是常见的缝洞连通模式,钻井过程中经常出现钻柱放空和泥浆漏失的现象,这些复杂的地质和工程因素导致常规的多重介质模型难以拟... 顺北油田包含溶洞、高角度裂缝、溶蚀孔洞和岩石基质4种储集介质,溶洞与高角度裂缝串联形成垂向串珠状缝洞体是常见的缝洞连通模式,钻井过程中经常出现钻柱放空和泥浆漏失的现象,这些复杂的地质和工程因素导致常规的多重介质模型难以拟合实测的试井数据。提出多个溶洞区域和裂缝区域串联的物理模型表征复杂的垂向串珠结构,溶洞区域仅包含溶洞介质,流体遵守自由流,裂缝区域包含高角度裂缝、溶蚀孔洞和基质,流体遵守达西定律,进而建立井洞相连的串珠状缝洞体试井模型,绘制试井典型图版,进行参数敏感性分析。结果表明:溶洞储集阶段和线性流阶段是串珠状缝洞体的典型流动阶段;根据试井压力导数曲线的斜率能识别溶洞和常规多重介质;重力影响下试井典型曲线会出现类似于封闭边界的压力响应特征,应采取措施降低重力的影响以提高串珠状缝洞体的开发效果。最后,应用所建模型解释了顺北油田典型井,除能解释常规的储层参数外,还能反演现有试井方法无法解释的溶洞等效半径、溶洞等效高度等参数。 展开更多
关键词 溶洞 垂向串珠状缝洞体 重力 封闭边界 顺北油田
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A Number Theoretic Analysis of the Enthalpy, Enthalpy Energy Density, Thermodynamic Volume, and the Equation of State of a Modified White Hole, and the Implications to the Quantum Vacuum Spacetime, Matter Creation and the Planck Frequency
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作者 Michele Nardelli Amos S. Kubeka Alizera Amani 《Journal of Modern Physics》 2024年第1期1-50,共50页
In this paper, we analyze the enthalpy, enthalpy energy density, thermodynamic volume, and the equation of state of a modified white hole. We obtain new possible mathematical connections with some sectors of Number Th... In this paper, we analyze the enthalpy, enthalpy energy density, thermodynamic volume, and the equation of state of a modified white hole. We obtain new possible mathematical connections with some sectors of Number Theory, Ramanujan Recurring Numbers, DN Constant and String Theory, that enable us to extract the quantum geometrical properties of these thermodynamic equations and the implication to the quantum vacuum spacetime geometry of our early universe as they act as the constraints to the nature of quantum gravity of the universe. 展开更多
关键词 Number Theory Ramanujan Recurring Numbers DN Constant string Theory Loop Quantum gravity Matter Creation Enthalpy Energy Density Thermodynamic Volume ENTHALPY
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在真相与后真相之间——量子引力理论蕴含的时空观 被引量:4
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作者 赵丹 高策 《自然辩证法通讯》 CSSCI 北大核心 2020年第1期31-36,共6页
真相时代科学的典范--广义相对论和量子力学--关于时空的观念存在冲突,在试图结合广义相对论与量子力学的量子引力理论构建中,最关键也最为困难的就是对时空的处理。文章沿着时空观念在物理学理论中的流变,着重分析了量子引力理论中所... 真相时代科学的典范--广义相对论和量子力学--关于时空的观念存在冲突,在试图结合广义相对论与量子力学的量子引力理论构建中,最关键也最为困难的就是对时空的处理。文章沿着时空观念在物理学理论中的流变,着重分析了量子引力理论中所蕴含的时空观念,揭示了量子引力理论中时空的涌现特性,探讨了其后真相的意义之所在。 展开更多
关键词 时空 量子引力 弦理论 圈量子引力
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二维弦引力模型中粒子的运动性质 被引量:3
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作者 颜骏 陶必友 《四川师范大学学报(自然科学版)》 CAS CSCD 2004年第6期626-629,共4页
研究了具有曲率和挠率的二维弦引力模型,在定态情况下证明了世界面时空上运动方程和极值曲线的可积性,发现具有质量的点粒子的运动速度可由标量场方程的首次积分表示;另外,还研究了场方程的数值解,分析了弦耦合对奇点附近粒子运动速度... 研究了具有曲率和挠率的二维弦引力模型,在定态情况下证明了世界面时空上运动方程和极值曲线的可积性,发现具有质量的点粒子的运动速度可由标量场方程的首次积分表示;另外,还研究了场方程的数值解,分析了弦耦合对奇点附近粒子运动速度的影响. 展开更多
关键词 二维弦引力模型 运动性质 弦耦合
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亚临界双管热采井口装置研制与应用 被引量:2
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作者 李啸南 郝天昭 +3 位作者 逯国成 杜永欣 黄侠 刘智 《石油机械》 北大核心 2004年第9期37-38,68,共3页
实现单井蒸汽辅助重力泄油工艺 ,采用一般的双管井口装置不能满足要求 ,这种井口装置必须满足在一口井中同时下入注汽和采油 2套管柱的工艺要求 ,2套管柱同时工作 ,边注边采。为此 ,研制开发了双管注汽采油井口装置。这种井口装置可以... 实现单井蒸汽辅助重力泄油工艺 ,采用一般的双管井口装置不能满足要求 ,这种井口装置必须满足在一口井中同时下入注汽和采油 2套管柱的工艺要求 ,2套管柱同时工作 ,边注边采。为此 ,研制开发了双管注汽采油井口装置。这种井口装置可以悬挂注汽、采油 2套管柱 ,同时满足注汽、采油的工艺要求 ,避免了常规注汽、闷井、自喷、抽采分步间隙进行的繁琐施工 ,提高了采油效率 ,降低了开采成本。试验与使用表明 ,这种双管热采井口装置耐高温、高压 ,密封可靠 ,取得了良好效果。 展开更多
关键词 注汽 井口装置 热采井口 套管柱 采油井 采油效率 单井蒸汽辅助重力泄油 耐高温 研制开发 工艺
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Cloud of strings in f(R) gravity 被引量:1
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作者 J.P.Morals Graca Iarley P.Lobo Ines G.Salako 《Chinese Physics C》 SCIE CAS CSCD 2018年第6期44-52,共9页
We derive the solution for a spherically symmetric string cloud configuration in a &dimensional spacetime in the framework of f(R) theories of gravity. We also analyze some thermodynamic properties of the joint bla... We derive the solution for a spherically symmetric string cloud configuration in a &dimensional spacetime in the framework of f(R) theories of gravity. We also analyze some thermodynamic properties of the joint black hole - cloud of strings solution. For its Hawking temperature, we found that the dependence of the mass with the horizon is significantly different in both theories. For the interaction of a black hole with thermal radiation, we found that the shapes of the curves are similar, but shifted. Our analysis generalizes some known results in the literature. 展开更多
关键词 modified theories of gravity black hole thermodynamics gravitational aspects of string theory
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延安火车站张弦梁结构找形分析
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作者 郭小亮 王正飞 +1 位作者 李鹏杰 李铁英 《钢结构》 2008年第7期26-29,共4页
针对张弦梁结构的找形,提出荷载反向迭代法。在给定初状态的情况下,对结构施加反向重力和反向预应力得到近似的零状态,然后改变施加的预应力值,通过控制位移,进行若干次的迭代得到满足要求的零状态。最后通过对延安火车站张弦梁结构的... 针对张弦梁结构的找形,提出荷载反向迭代法。在给定初状态的情况下,对结构施加反向重力和反向预应力得到近似的零状态,然后改变施加的预应力值,通过控制位移,进行若干次的迭代得到满足要求的零状态。最后通过对延安火车站张弦梁结构的试验和计算验证该方法是正确的。 展开更多
关键词 找形 张弦梁结构 反向迭代法 反向重力 反向预应力
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A Very Simple Model Concerning the Unified Field Theory Basing on the Kronig-Penney-Model
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作者 Carsten Wochnowski 《Journal of High Energy Physics, Gravitation and Cosmology》 2019年第3期941-952,共12页
In this paper, a very simple novel model is presented concerning the unified field theory (“theory of everything”). In the scope of this novel theory, it is assumed that matter, space and time are quantized. It is a... In this paper, a very simple novel model is presented concerning the unified field theory (“theory of everything”). In the scope of this novel theory, it is assumed that matter, space and time are quantized. It is assumed that the space is subdivided into cubic elementary cells (space quanta), and in each of its eight corners a Delta potential is positioned. That means the Delta potentials are equidistantly arranged, so that the Delta potentials are forming a lattice similar to a crystal lattice in solid state physics. The novel theory is analogue to the Kronig-Penney model well-known in solid state physics: a crystal lattice comprises Delta potentials arranged equidistantly to one another, so the lattice space can be considered as being quantized by an array of equally spaced Delta potentials or the lattice space is divided into cubic elementary cells (space quanta). But instead of electrons, material quanta are inserted into the cubic elementary cells or space quanta. So the material quanta are not freely vibrating (unbound state), but are vibrating in a bound state with discrete energy levels separated by an energy gap. This is due to the presence of the array of Delta potentials. In the frame of this novel theory the Schr?dinger Equation for the Kronig-Penney-Model is not solved by differentiation, but the Schr?dinger Equation is integrated yielding the formula , by whose discussion the existence of an energy gap is revealed. This energy gap is responsible if the material quantum occurs as light quantum (photon) or mass quantum. 展开更多
关键词 string THEORY Loop Quantum gravity THEORY UNIFIED Field THEORY
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