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A High-Precision Calculation of Bond Length and Spectroscopic Constants of Hg2 Based on the Coupled-Cluster Theory with Spin-Orbit Coupling
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作者 涂喆研 王文亮 《Chinese Physics Letters》 SCIE CAS CSCD 2015年第6期36-39,共4页
Based on the two-component relativistic effective core potential and matched basis sets cc-pwcvnz-pp (n=Q, 5), combining the completed basis-set extrapolation of electronic correlation energy and the fourth-order po... Based on the two-component relativistic effective core potential and matched basis sets cc-pwcvnz-pp (n=Q, 5), combining the completed basis-set extrapolation of electronic correlation energy and the fourth-order polynomial fitting technique, the bond length and spectroscopic constants of Hg2 are studied by the coupled cluster theory with spin-orbit coupling. Spin-orbit coupling is included in the post Hartree-Fock procedure, i.e., in the coupled- cluster iteration, to obtain more reliable theoretical results. The results show that our theoretical values agree with the experimental values very well and will be helpful to understand the spectral character of Hg2. 展开更多
关键词 HG A High-Precision Calculation of Bond length and Spectroscopic constants of Hg2 Based on the Coupled-Cluster Theory with Spin-Orbit Coupling
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Not Relying on the Newton Gravitational Constant Gives More Accurate Gravitational Predictions
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作者 Espen Gaarder Haug 《Journal of Applied Mathematics and Physics》 2023年第10期3124-3158,共35页
The Newton gravitational constant is considered a cornerstone of modern gravity theory. Newton did not invent or use the gravity constant;it was invented in 1873, about the same time as it became standard to use the k... The Newton gravitational constant is considered a cornerstone of modern gravity theory. Newton did not invent or use the gravity constant;it was invented in 1873, about the same time as it became standard to use the kilogram mass definition. We will claim that G is just a term needed to correct the incomplete kilogram definition so to be able to make gravity predictions. But there is another way;namely, to directly use a more complete mass definition, something that in recent years has been introduced as collision-time and a corresponding energy called collision-length. The collision-length is quantum gravitational energy. We will clearly demonstrate that by working with mass and energy based on these new concepts, rather than kilogram and the gravitational constant, one can significantly reduce the uncertainty in most gravity predictions. 展开更多
关键词 Gravity Predictions Reduction of Errors Newton’s Gravitational constant Collision Space-Time Cavendish Apparatus Planck length Planck Time
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Calculation of Bond-length, Bond-energy and Force Constant of Hydrogen Molecule by Classical Mechanics
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作者 ChenJing 《工程科学(英文版)》 2004年第2期44-47,共4页
Until recently the hydrogen molecule structural parameters are calculated with the methods of quantum mechanics. To achieve results close to experimental values, the wave function used is complicated and has no clear ... Until recently the hydrogen molecule structural parameters are calculated with the methods of quantum mechanics. To achieve results close to experimental values, the wave function used is complicated and has no clear physical meaning. Because the distribution of the electron probability density is a statistical rule, the macro time has actually been used in the concept on a electron cloud graph. Here are obtained three formulas with a classical mechanics method on the bond length r e , bond energy D e and force constant k of the ground state hydrogen molecule, which have a clear physical meaning but no artificial parameters, and compared with experimental values, the relative errors are respectively less than 1%, 2% and 4%. 展开更多
关键词 氢分子 结合长度 结合能 量子化学 化学键 作用力常数
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基于成渝中线隧道参数CR450高速动车组气密性阈值分布特征研究
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作者 赵亮 杜迎春 梅元贵 《兰州交通大学学报》 CAS 2024年第2期95-103,共9页
以成渝中线隧道特征为研究背景,利用一维可压缩不等熵流动模型的广义黎曼变量特征线方法,研究了CR450高速动车组单列车通过隧道和两列车中央等速交会时,车内外压力波特征及隧道长度、速度、不同时间间隔内最大压力变化量对气密阈值影响... 以成渝中线隧道特征为研究背景,利用一维可压缩不等熵流动模型的广义黎曼变量特征线方法,研究了CR450高速动车组单列车通过隧道和两列车中央等速交会时,车内外压力波特征及隧道长度、速度、不同时间间隔内最大压力变化量对气密阈值影响特性。研究表明:最不利隧道内车外压力波动幅值最大,随着隧道长度增加,车内压力波动幅值增大;单列车满足车内每3 s内最大压力时时间常数阈值基本在最不利隧道内最大,交会时基于气密性的最不利隧道与根据车外压力载荷得到的最不利隧道长度不同;单列车时间常数阈值随速度的增加而增加,两列车以430 km/h和450 km/h交会时,时间常数阈值基本相同;单列车头尾车和中间车满足13个压力标准时时间常数阈值最大分别为51 s和42 s,交会分别为88 s和92 s。 展开更多
关键词 成渝中线 隧道长度 速度 气密性 时间常数
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CHZ-Ⅱ海洋重力仪研制与实践
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作者 柳林涛 何建刚 +8 位作者 许江宁 刘雷钧 高金耀 孙中苗 吴太旗 梁星辉 胡明 郎骏健 何泓洋 《测绘学报》 EI CSCD 北大核心 2024年第4期620-628,共9页
海洋重力仪是获取高精度高分辨率海洋重力场的重要仪器,主要应用于资源勘探、大地水准面精化、海洋科学研究和重力辅助惯性导航等领域。我国现有的海洋重力仪主要依靠国外进口,不仅价格高,而且在仪器的引进、维护等方面存在诸多的不便... 海洋重力仪是获取高精度高分辨率海洋重力场的重要仪器,主要应用于资源勘探、大地水准面精化、海洋科学研究和重力辅助惯性导航等领域。我国现有的海洋重力仪主要依靠国外进口,不仅价格高,而且在仪器的引进、维护等方面存在诸多的不便。在科技部首批重大科学仪器专项的支持下,基于CHZ海洋重力仪成功研制出具有完全自主知识产权的CHZ-Ⅱ弹簧式海洋重力仪。该新型重力仪采用金属零长弹簧作为测量元件,其独特的轴对称垂直悬挂结构可克服交叉耦合效应;高精度伺服控制技术及强阻尼的应用可克服载体扰动的影响,确保仪器在不同海况下保持测量精度;高精度恒温技术及温度补偿技术可消除环境温度波动对仪器测量精度的影响。本文介绍了该仪器的工作原理、系统构成、技术特点及测试结果。静态试验表明其月漂移优于3 mGal;码头系泊试验表明其动态精度达到0.2 mGal,能清晰反映海潮的重力变化特征;总航程超过5万海里船载试验表明其综合测量精度优于1 mGal。仪器在精度和稳定性上达到与国内外同类仪器并跑水平,可替代当前国外进口的海洋重力仪。 展开更多
关键词 CHZ-Ⅱ海洋重力仪 零长弹簧 硅油阻尼 高精度恒温技术 陀螺稳定平台 海洋重力测量
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海洋重力仪金属零长弹簧的性能研究及研制
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作者 汪龙 邹舟 +1 位作者 吴鹏飞 柳林涛 《大地测量与地球动力学》 CSCD 北大核心 2024年第7期759-763,共5页
揭示海洋重力仪金属零长弹簧的物理特性,阐述基于Fe-Ni系恒弹性合金研制金属零长弹簧的工艺,并系统总结关键研制过程及研制难点,研制出一批性能优异、零长状态佳的海洋重力仪金属零长弹簧。
关键词 金属零长弹簧 恒弹性合金 预应力 反向旋转 海洋重力仪
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定长成型立体织物矩阵式自适应送经技术研究
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作者 杨继毓 瞿书涯 宋涛 《玻璃纤维》 CAS 2024年第2期7-12,共6页
以立体机织物成型工艺为基础,分析传统送经路径,提出直通式送经路径设计技术。通过经纱球面点阵布置,解决单根经纱间张力不均和开口不清晰等技术问题。采用经纱恒张力控制技术,通过送经装置的力学建模,推导出恒张力的力学方程,并使用MAT... 以立体机织物成型工艺为基础,分析传统送经路径,提出直通式送经路径设计技术。通过经纱球面点阵布置,解决单根经纱间张力不均和开口不清晰等技术问题。采用经纱恒张力控制技术,通过送经装置的力学建模,推导出恒张力的力学方程,并使用MATLAB分析其运动规律。为织物成型过程中张力恒定提供一种理论方法,实现了立体机织物高效、稳定的制备,同时保证了批次织物产品质量的一致性。 展开更多
关键词 定长成型 立体织物 直通式送经路径 球面点阵布置 恒张力送经
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Attribute-Based Access Control for Multi-Authority Systems with Constant Size Ciphertext in Cloud Computing 被引量:15
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作者 CHEN Yanli SONG Lingling YANG Geng 《China Communications》 SCIE CSCD 2016年第2期146-162,共17页
In most existing CP-ABE schemes, there is only one authority in the system and all the public keys and private keys are issued by this authority, which incurs ciphertext size and computation costs in the encryption an... In most existing CP-ABE schemes, there is only one authority in the system and all the public keys and private keys are issued by this authority, which incurs ciphertext size and computation costs in the encryption and decryption operations that depend at least linearly on the number of attributes involved in the access policy. We propose an efficient multi-authority CP-ABE scheme in which the authorities need not interact to generate public information during the system initialization phase. Our scheme has constant ciphertext length and a constant number of pairing computations. Our scheme can be proven CPA-secure in random oracle model under the decision q-BDHE assumption. When user's attributes revocation occurs, the scheme transfers most re-encryption work to the cloud service provider, reducing the data owner's computational cost on the premise of security. Finally the analysis and simulation result show that the schemes proposed in this thesis ensure the privacy and secure access of sensitive data stored in the cloud server, and be able to cope with the dynamic changes of users' access privileges in large-scale systems. Besides, the multi-authority ABE eliminates the key escrow problem, achieves the length of ciphertext optimization and enhances the effi ciency of the encryption and decryption operations. 展开更多
关键词 系统初始化 计算成本 密文 访问控制 权威 属性 加密解密 安全访问
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Newton Did Not Invent or Use the So-Called Newton’s Gravitational Constant;G, It Has Mainly Caused Confusion 被引量:1
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作者 Espen Gaarder Haug 《Journal of Modern Physics》 2022年第2期179-205,共27页
Newton did not invent or use the so-called Newton’s gravitational constant G. Newton’s original gravity formula was and not . In this paper, we will show how a series of major gravity phenomena can be calculated and... Newton did not invent or use the so-called Newton’s gravitational constant G. Newton’s original gravity formula was and not . In this paper, we will show how a series of major gravity phenomena can be calculated and predicted without the gravitational constant. This is, to some degree, well known, at least for those that have studied a significant amount of the older literature on gravity. However, to understand gravity at a deeper level, still without G, one needs to trust Newton’s formula. It is when we first combine Newton’s assumptionn, that matter and light ultimately consist of hard indivisible particles, with new insight in atomism that we can truly begin to understand gravity at a deeper level. This leads to a quantum gravity theory that is unified with quantum mechanics and in which there is no need for G and not even a need for the Planck constant. We claim that two mistakes have been made in physics, which have held back progress towards a unified quantum gravity theory. First, it has been common practice to consider Newton’s gravitational constant as almost holy and untouchable. Thus, we have neglected to see an important aspect of mass;namely, the indivisible particle that Newton also held in high regard. Second, standard physics have built their quantum mechanics around the de Broglie wavelength, rather than the Compton wavelength. We claim the de Broglie wavelength is merely a mathematical derivative of the Compton wavelength, the true matter wavelength. 展开更多
关键词 Newton Gravity Newton’s Gravitational constant Schwarzschild Radius Quantum Gravity Planck length
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Physical Constants as Result of the Many Hypercubic Lattices of a Multidirectional Discrete Space
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作者 Christiaan T. de Groot 《Journal of Modern Physics》 2020年第3期432-447,共16页
A multidirectional discrete space consists of numerous hypercubic lattices each of which contains one of the spatial directions. In such a space, several groups of lattices can be distinguished with a certain property... A multidirectional discrete space consists of numerous hypercubic lattices each of which contains one of the spatial directions. In such a space, several groups of lattices can be distinguished with a certain property. Each group is determined by the number of lattices it comprises, forming the characterizing numbers of the space. Using the specific properties of a multidirectional discrete space, it is shown that some of the characterizing numbers can be associated with a physical constant. The fine structure constant appears to be equal to the ratio of two of these numbers, which offers the possibility of calculating the series of smallest numerical values of these numbers. With these values, a reasoned estimate can be made of the upper limit of the smallest distance of the discrete space of approximately the Planck length. 展开更多
关键词 Hypercubic Lattice Multidirectional DISCRETE SPACE Characterizing Numbers Fine Structure constant Physical constantS PLANCK length
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A Solution to the Cosmological Constant Problem in Two Time Dimensions
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作者 Christoph Köhn 《Journal of High Energy Physics, Gravitation and Cosmology》 2020年第4期640-655,共16页
For the last hundred years, the existence and the value of the cosmological constant Λ has been a great enigma. So far, any theoretical model has failed to predict the value of Λ by several orders of magnitude. We h... For the last hundred years, the existence and the value of the cosmological constant Λ has been a great enigma. So far, any theoretical model has failed to predict the value of Λ by several orders of magnitude. We here offer a solution to the cosmological constant problem by extending the Einstein-Friedmann equations by one additional time dimension. Solving these equations, we find that the Universe is flat on a global scale and that the cosmological constant lies between 10<sup>-90</sup> m<sup>-2</sup> and 10<sup>-51</sup> m<sup>-2</sup> which is in range observed by experiments. It also proposes a mean to explain the Planck length and to mitigate the singularity at the Big Bang. 展开更多
关键词 Two Time Dimensions Planck length Cosmological constant Problem Curvature of the Universe
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The Inner Structure of the Intrinsic Electron and the Origin of Self-Mass
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作者 Victor Vaguine 《Journal of High Energy Physics, Gravitation and Cosmology》 CAS 2023年第1期174-189,共16页
A brief review and analysis of two historical models of the electron, the charged spinning sphere and Goudsmit and Uhlenbeck’s concept, is presented. It is shown that the enormous potential of classical electrodynami... A brief review and analysis of two historical models of the electron, the charged spinning sphere and Goudsmit and Uhlenbeck’s concept, is presented. It is shown that the enormous potential of classical electrodynamics has been underutilized in particle physics. Such observation leads to discovery of a principal component in the electron inner structure—the charged c-ring. The intrinsic (fundamental) electron model based on the charged c-ring successfully explains the ontology of the charge fractionation in quantum chromodynamics and the formation of Cooper pairs in superconductivity. The c-ring properties are explained on the basis of the General Compton Conditions as defined. Properties of the charged c-ring include the explanation of the boundary conditions, electro-magnetostatic field configuration, self-mass, spin, magnetic moment, and the gyromagnetic ratio. The self-mass of the intrinsic electron is 100% electro-magnetostatic and it is shown how to compute its value. The classical-quantum divide no longer exists. Relation between the intrinsic electron and the electron is fundamentally defined. The electron is the composite fermion consisting of the intrinsic electron and the neutrino. The ontology of the anomaly in the electron magnetic moment is demonstrated—it is due to the addition of the neutrino magnetic moment to the overall electron magnetic moment. The intrinsic electron replaces the W? boson in particle physics, resulting in a fundamental implication for the Standard Model. 展开更多
关键词 Intrinsic Electron Inner Structure Electro-Magnetostatic Self-Mass General Compton Conditions Charged c-ring Visualization c-ring length constant
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O_(2)/CO_(2)氛围下正庚烷的燃烧机理研究
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作者 李晨曦 刘永峰 +3 位作者 张璐 刘海峰 宋金瓯 何旭 《化工学报》 EI CSCD 北大核心 2023年第5期2157-2169,共13页
为研究正庚烷(n-C_(7)H_(16))在O_(2)/CO_(2)氛围下的燃烧特性,提出了基于CO_(2)与H·详细反应路径的C-H燃烧机理。通过密度泛函理论对CO_(2)与H·可能存在的反应路径进行了分析,根据定容燃烧弹实际尺寸建立了计算网格,利用C-H... 为研究正庚烷(n-C_(7)H_(16))在O_(2)/CO_(2)氛围下的燃烧特性,提出了基于CO_(2)与H·详细反应路径的C-H燃烧机理。通过密度泛函理论对CO_(2)与H·可能存在的反应路径进行了分析,根据定容燃烧弹实际尺寸建立了计算网格,利用C-H机理计算了正庚烷在不同氛围(空气、53%O_(2)/47%CO_(2)、61%O_(2)/39%CO_(2))下的燃烧过程;搭建了定容燃烧弹可视化实验平台,对正庚烷在不同氛围下的燃烧过程进行了测量;对CO_(2)的反应位点、CO_(2)+H·——→CO+·OH的反应能垒、火焰长度进行了分析。结果表明:C-H机理可以很好地预测正庚烷在O_(2)/CO_(2)氛围下的燃烧火焰长度,在50%O_(2)/50%CO_(2)氛围下的最大误差和平均误差分别为9.60%、2.42%;反应位点分析发现,CO_(2)氧原子的反应活性大于碳原子,氧端的平均局部离子化能和分子表面静电势分别为297.72 kcal/mol、-13.08 kcal/mol;H·与CO_(2)的碳原子和氧原子均可发生结合,反应能垒分别为26.71、11.07 kcal/mol。 展开更多
关键词 二氧化碳 计算化学 计算流体力学 定容燃烧弹 反应位点 火焰长度
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聚酰亚胺纤维对PTFE基板介电和热膨胀性能的影响
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作者 贾倩倩 冯春明 +2 位作者 张立欣 李强 王军山 《工程塑料应用》 CAS CSCD 北大核心 2023年第2期34-38,共5页
采用不同平均长度和质量分数的聚酰亚胺(PI)纤维,用压延方法制备聚四氟乙烯(PTFE)基板,研究PI纤维对PTFE基板介电和热膨胀性能的影响。结果表明,随PI纤维质量分数的提高,PTFE基板介电常数呈现升高的趋势,而介电常数随PI纤维平均长度的... 采用不同平均长度和质量分数的聚酰亚胺(PI)纤维,用压延方法制备聚四氟乙烯(PTFE)基板,研究PI纤维对PTFE基板介电和热膨胀性能的影响。结果表明,随PI纤维质量分数的提高,PTFE基板介电常数呈现升高的趋势,而介电常数随PI纤维平均长度的变化并不明显。随PI纤维质量分数的提高,PTFE基板厚度方向(Z轴方向)的热膨胀系数(Z-CTE)呈现降低的趋势,当质量分数达到9%以上时,Z-CTE趋于稳定。随PI纤维平均长度的升高,Z-CTE呈下降趋势,PI纤维平均长度超过80μm时,Z-CTE反而上升。在介电常数2.20,Z-CTE越小越好的要求下,通过响应曲面设计,找到最佳理论配方。基于该配方,制备PI纤维质量分数为7.36%、平均长度为68μm的PTFE基板样品,测试介电常数和Z-CTE,结果分别为2.2015和234.5×10^(-6)K^(-1),与理论模型计算相符。 展开更多
关键词 聚酰亚胺 纤维平均长度 纤维含量 聚四氟乙烯基板材料 介电常数 热膨胀系数
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一种新的超声刀能量发生器的设计与验证
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作者 林晓佳 周宇 +4 位作者 孙福佳 代琦 周佳俊 黄永国 赵浩男 《生物医学工程学进展》 CAS 2023年第2期139-148,共10页
目的目前国内超声刀的品牌越来越多,但关于超声刀能量发生器的研制和参数优化的相关文献非常少。该文旨在研发一种新的超声刀能量发生器,用于进行不同控制模式、不同参数调节的研究工作。方法自主设计超声刀能量发生器硬件,使用FPGA+DA... 目的目前国内超声刀的品牌越来越多,但关于超声刀能量发生器的研制和参数优化的相关文献非常少。该文旨在研发一种新的超声刀能量发生器,用于进行不同控制模式、不同参数调节的研究工作。方法自主设计超声刀能量发生器硬件,使用FPGA+DAC构成直接数字合成器(DDS)实现频率调整,采用开关型E类功率放大器来降低系统发热;在算法设计上,采用小步长频率跟踪策略,使系统工作于谐振状态,同时采用PID算法实现恒电流和恒功率输出;最后开展性能测试实验。结果DDS调整频率的最小步长为0.0116Hz,频率跟踪在切割过程中始终保持锁相稳定;恒电流输出使超声刀在空载和带载状态下均具备良好的切割性能,工作过程中电流波动小于1mA,切割速度随着电流的增大明显加快。在带载状态下,300mA恒电流模式切断小肠时间为(8.01±0.35)s,热损伤宽度为(3.57±0.23)mm。结论该方案下的超声刀能量发生器可以实现高精度的频率跟踪和稳定的恒流输出,该套设备为超声刀能量发生器的设计提供了可行的方案。 展开更多
关键词 超声刀能量发生器 恒电流输出 热损伤宽度 小步长调频
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不同弯曲方法对辊弯成形回弹的影响研究
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作者 韩飞 孙玮隆 张若青 《中国机械工程》 EI CAS CSCD 北大核心 2023年第19期2353-2361,共9页
为研究辊弯成形过程中不同弯曲方法对回弹的影响,采用试验与有限元仿真相结合的方法分析了不同弯曲方法、圆角半径、板材厚度对回弹的影响;对不同弯曲方法下辊弯成形过程中的应力应变分布情况进行分析,揭示了不同弯曲方法下辊弯成形的... 为研究辊弯成形过程中不同弯曲方法对回弹的影响,采用试验与有限元仿真相结合的方法分析了不同弯曲方法、圆角半径、板材厚度对回弹的影响;对不同弯曲方法下辊弯成形过程中的应力应变分布情况进行分析,揭示了不同弯曲方法下辊弯成形的回弹机理。研究结果表明:根据不同弯曲方法(定半径法及定长度法)的工艺原理,各道次圆角半径与弯曲段弧长的设计差异是影响两者应力-应变分布以及回弹量不同的主要因素;定半径法回弹量随道次数的增加而增大,增幅也随之增大;定长度法回弹量随道次数的增加变化不明显,且幅值大于定半径法的幅值;在两种弯曲方法下,回弹量均出现随圆角半径增大而增大、板材厚度增大而减小的趋势。 展开更多
关键词 辊弯成形 回弹 弯曲方法 定半径法 定长度法
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The Intrinsic Electron with Its Properties Such as Inner Structure and Self-Mass Is in Conflict with Quantum Field Theory
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作者 Victor Vaguine 《Journal of High Energy Physics, Gravitation and Cosmology》 2023年第3期583-595,共13页
The quantum field theory (QFT) is one of branches of the Standard Model. According to QFT, quantum fields are the primary entities and particles are the excitations of these fields, coming in discrete lumps with no in... The quantum field theory (QFT) is one of branches of the Standard Model. According to QFT, quantum fields are the primary entities and particles are the excitations of these fields, coming in discrete lumps with no inner structures and with properties assigned by declaration. Such view is in conflict with the observed vacuum energy density, 140 orders of magnitudes less than required by the QFT. In addition, such view is challenged by Aphysical Quantum Mechanics (AQM), a deeper quantum theory. According to AQM, the fundamental understanding of quantum reality is expanded by the addition of two fundamental categories, aphysical and elementary consciousness of elementary particles. Based on AQM and as an example, the total ontology of the intrinsic (fundamental) electron is presented with its inner structure of perfect geometry consisting of the physical charged c-ring and aphysical cylinder, and with its properties such as self-mass, spin, magneto-electrostatic field configuration and magnetic moment. The position parameter in the inner structure demonstrates that there are no two identical intrinsic electrons in the Universe thus placing a question mark over the QFT principle of indistinguishability. 展开更多
关键词 Quantum Reality Physical-Aphysical Intrinsic Electron Charged c-ring Aphysical Cylinder Elementary Consciousness Position Parameter constant U Ontology Self-Mass Indistinguishable Inner Structure
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A New Interpretation of the Higgs Vacuum Potential Energy Based on a Planckion Composite Model for the Higgs
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作者 Christopher Pilot 《Journal of High Energy Physics, Gravitation and Cosmology》 2023年第3期666-683,共18页
We present a new interpretation of the Higgs field as a composite particle made up of a positive, with, a negative mass Planck particle. According to the Winterberg hypothesis, space, i.e., the vacuum, consists of bot... We present a new interpretation of the Higgs field as a composite particle made up of a positive, with, a negative mass Planck particle. According to the Winterberg hypothesis, space, i.e., the vacuum, consists of both positive and negative physical massive particles, which he called planckions, interacting through strong superfluid forces. In our composite model for the Higgs boson, there is an intrinsic length scale associated with the vacuum, different from the one introduced by Winterberg, where, when the vacuum is in a perfectly balanced state, the number density of positive Planck particles equals the number density of negative Planck particles. Due to the mass compensating effect, the vacuum thus appears massless, chargeless, without pressure, energy density, or entropy. However, a situation can arise where there is an effective mass density imbalance due to the two species of Planck particle not matching in terms of populations, within their respective excited energy states. This does not require the physical addition or removal of either positive or negative Planck particles, within a given region of space, as originally thought. Ordinary matter, dark matter, and dark energy can thus be given a new interpretation as residual vacuum energies within the context of a greater vacuum, where the populations of the positive and negative energy states exactly balance. In the present epoch, it is estimated that the dark energy number density imbalance amounts to, , per cubic meter, when cosmic distance scales in excess of, 100 Mpc, are considered. Compared to a strictly balanced vacuum, where we estimate that the positive, and the negative Planck number density, is of the order, 7.85E54 particles per cubic meter, the above is a very small perturbation. This slight imbalance, we argue, would dramatically alleviate, if not altogether eliminate, the long standing cosmological constant problem. 展开更多
关键词 Winterberg Model Planck Particles Positive and Negative Mass Planck Particles Planckions Quantum Vacuum Space as a Superfluid/Supersolid Extended Models for Space Cosmological constant Higgs Field as a Composite Particle Higgs Boson Inherent length Scale for the Vacuum Dark Energy
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On the Cosmic Evolution of the Quantum Vacuum Using Two Variable G Models and Winterberg’s Thesis
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作者 Christopher Pilot 《Journal of High Energy Physics, Gravitation and Cosmology》 2023年第4期1134-1160,共27页
We work within a Winterberg framework where space, i.e., the vacuum, consists of a two component superfluid/super-solid made up of a vast assembly (sea) of positive and negative mass Planck particles, called planckion... We work within a Winterberg framework where space, i.e., the vacuum, consists of a two component superfluid/super-solid made up of a vast assembly (sea) of positive and negative mass Planck particles, called planckions. These material particles interact indirectly, and have very strong restoring forces keeping them a finite distance apart from each other within their respective species. Because of their mass compensating effect, the vacuum appears massless, charge-less, without pressure, net energy density or entropy. In addition, we consider two varying G models, where G, is Newton’s constant, and G<sup>-1</sup>, increases with an increase in cosmological time. We argue that there are at least two competing models for the quantum vacuum within such a framework. The first follows a strict extension of Winterberg’s model. This leads to nonsensible results, if G increases, going back in cosmological time, as the length scale inherent in such a model will not scale properly. The second model introduces a different length scale, which does scale properly, but keeps the mass of the Planck particle as, ± the Planck mass. Moreover we establish a connection between ordinary matter, dark matter, and dark energy, where all three mass densities within the Friedman equation must be interpreted as residual vacuum energies, which only surface, once aggregate matter has formed, at relatively low CMB temperatures. The symmetry of the vacuum will be shown to be broken, because of the different scaling laws, beginning with the formation of elementary particles. Much like waves on an ocean where positive and negative planckion mass densities effectively cancel each other out and form a zero vacuum energy density/zero vacuum pressure surface, these positive mass densities are very small perturbations (anomalies) about the mean. This greatly alleviates, i.e., minimizes the cosmological constant problem, a long standing problem associated with the vacuum. 展开更多
关键词 Winterberg Model Planck Particles Positive and Negative Mass Planck Particles Planckions Quantum Vacuum Space as a Superfluid/Supersolid Extended Models for Space Cosmological constant Higgs Field as a Composite Particle Higgs Boson Inherent length Scale for the Vacuum Dark Energy Cosmological Scaling Behavior for the Quantum Vacuum Variable G Models Extended Gravity Newton’s constant as an Order Parameter High Energy Behavior for the Vacuum
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天然气-氢气-空气混合气的层流燃烧速度测定 被引量:70
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作者 张勇 黄佐华 +2 位作者 廖世勇 王倩 蒋德明 《内燃机学报》 EI CAS CSCD 北大核心 2006年第2期97-103,共7页
在定容燃烧弹内研究了常温常压下天然气-氢气-空气混合气的火焰传播规律,得到了不同掺氢比例(氢气在天然气中的体积掺混比例为0%~100%)和燃空当量比(0.6~1.4)下混合气的层流燃烧速率和马克斯坦长度,通过对马克斯坦长度的测... 在定容燃烧弹内研究了常温常压下天然气-氢气-空气混合气的火焰传播规律,得到了不同掺氢比例(氢气在天然气中的体积掺混比例为0%~100%)和燃空当量比(0.6~1.4)下混合气的层流燃烧速率和马克斯坦长度,通过对马克斯坦长度的测量,分析了拉伸对火焰传播的影响。结果表明,随着天然气中掺氢比例的增加,混合气的燃烧速率呈指数规律增加,马克斯坦长度值减小,火焰的稳定性下降。各掺氢比例下,随当量比的增加,马克斯坦长度值增加,火焰的稳定性增强。通过对试验结果的数据拟合,得到了计算天然气-氢气-空气混合气层流燃烧速率的关系式。 展开更多
关键词 层流燃烧速率 马克斯坦长度 拉伸 定容燃烧弹
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