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Atom

Atom的相关文献在1990年到2022年内共计187篇,主要集中在自动化技术、计算机技术、数学、化学 等领域,其中期刊论文170篇、专利文献17篇;相关期刊89种,包括军民两用技术与产品、微型计算机、计算机应用文摘等; Atom的相关文献由300位作者贡献,包括Hans W. Giertz、Waldemar Wolney Filho、崔璨等。

Atom—发文量

期刊论文>

论文:170 占比:90.91%

专利文献>

论文:17 占比:9.09%

总计:187篇

Atom—发文趋势图

Atom

-研究学者

  • Hans W. Giertz
  • Waldemar Wolney Filho
  • 崔璨
  • 牛唱(图)
  • 陆桑璐
  • Aram A. Sahakyan
  • Bagrat A. Grigoryan
  • Gayane A. Amatuni
  • Hrant N. Yeritsyan
  • J.G.班尼特
  • 期刊论文
  • 专利文献

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    • 张俊强; 杨大春
    • 摘要: Let L:=-△+V be the Schrodinger operator on R^(n)with n≥3,where V is a non-negative potential satisfying△^(-1)(V)∈L^(∞)(R^(n)).Let w be an L-harmonic function,determined by V,satisfying that there exists a positive constantδsuch that,for any x∈Rn,0<δ≤w(x)≤1.Assume that p(·):R^(n)→(0,1]is a variable exponent satisfying the globally log-Hölder continuous condition.In this article,the authors show that the mappings HL^(p)(·))(R^(n))■f■wf∈H^(p)(·)(R^(n))and HL^(p(·))(R^(n))■f■(-△)^(1/2)L^(-1/2)(f)∈H^(p(·))(R^(n))are isomorphisms between the variable Hardy spaces HL^(p(·))(R^(n)),associated with L,and the variable Hardy spaces H^(p(·))(R^(n)).
    • Yangyang Zhang; Dachun Yang; Wen Yuan; Songbai Wang
    • 摘要: Let X be a ball quasi-Banach function space on R^(n).In this article,we introduce the weak Hardytype space WH_(X)(R^(n)),associated with X,via the radial maximal function.Assuming that the powered HardyLittlewood maximal operator satisfies some Fefferman-Stein vector-valued maximal inequality on X as well as it is bounded on both the weak ball quasi-Banach function space WX and the associated space,we then establish several real-variable characterizations of WH_(X)(R^(n)),respectively,in terms of various maximal functions,atoms and molecules.As an application,we obtain the boundedness of Calderón-Zygmund operators from the Hardy space H_(X)(R^(n))to WH_(X)(Rn),which includes the critical case.All these results are of wide applications.Particularly,when X:=M^(q)_(p)(R^(n))(the Morrey space),X:=L^(p)(R^(n))(the mixed-norm Lebesgue space)and X:=(EΦq)t(Rn)(the Orlicz-slice space),which are all ball quasi-Banach function spaces rather than quasiBanach function spaces,all these results are even new.Due to the generality,more applications of these results are predictable.
    • Guangheng Xie1; Yong Jiao2; Dachun Yang1
    • 摘要: In this article,we introduce the martingale Musielak-Orlicz Hardy spaces H_Φ^*(■),PΦ(?),H_Φ^S(■),QΦ(?)and H_Φ^s(■),respectively,via the maximal function,the quadratic variation and the conditional quadratic variation of martingales.We then establish the atomic characterizations of H_Φ^s(■),PΦ(■)and QΦ(■).As applications,we obtain the dual space of H_Φ^s(■)and several martingale inequalities which further clarify the relations among H_Φ^*(■),PΦ(■),H_Φ^S(■),QΦ(■)and H_Φ^s(■).Especially,as special cases,the results on atomic characterizations of H_Φ^s(■),PΦ(?)and QΦ(■)as well as on the dual space of H_Φ^s(■)in the weighted case are also new.
    • Russell Bagdoo
    • 摘要: Based on radioactive phenomena (weak force), Georges Lemaître conceives, as soon as 1927, the primeval universe as a “unique super-dense quantum”, whose disintegration gave birth to all the current components of the universe [1] [2]. Using quantum mechanics, he proposes to explain the origins of the world from the point of view of quantum theory. He believes to find in the cosmic rays the manifestation of the initial fragmentation. However, regardless of the adopted cosmology, the hypothesis of the primeval atom (cold big bang) had no equation to support it and was not retained. Like all other cosmologists, he fell back on the Friedmann-Einstein equation with a repulsive cosmological constant which, according to supernova observations at the end of the millennium, propels expansion towards infinity. We juxtapose our equation of “quantum cosmology” to this equation of relativistic cosmology. We have already proposed this equation in an earlier paper [3], which has its source in quantum mechanics and fits Lemaître’s hypothesis of the “primeval atom”. It’s an equation in which the concept of matter-space-time is mathematically connected;gravitation and electromagnetism are also bound by space-time. A mechanism is described showing how velocity, time, distance, matter and energy, are correlated. We are led to ascertain that gravity and electricity are two distinct manifestations of a single underlying process: electrogravitation. For the first time, the cosmological time, considered as a real physical object, is integrated into a “cosmological equation” which makes coherent what we know regarding the time (its origin, its flow…), the matter and the space. Moreover, the equation indicates a constantly decelerated expansion. The concentration of the material medium and the importance of the decreasing energy of the vacuum contribute to the progressive increase of the positive pressure which becomes responsible for the increasing deceleration of the expansion. Does this mean that our equation leads us inevitably to the hypothesis of the primeval atom for the whole cosmos? Certainly not, since our model includes both the hot Gamow model and the cold Lemaître model. The term “dynamic evolution” (used in the beginning by specialists for big bang models) is appropriate for our model since there is both an explosive origin and, throughout the expansion, a disintegration of a hyper-dense matter. The discovery of cosmic microwave background radiation has confirmed the hot big bang model that Gamow and his team have achieved. The predicted light prevailed over the primitive cosmic rays (particles) suggested by Lemaitre. Nevertheless, we think that Lemaitre was also right. The so-called big bang theory (singular cataclysmic explosion), in addition to not meeting basic criteria of science, is contradicted by several observations that are ignored. For example, the work of Armenian astronomers has convinced us that the origin of cosmic particles results not only from supernova explosions, but also from the partition of radio galaxies, not only from the death of the world, but also from their birth.
    • Stanislaw Olszewski
    • 摘要: It is demonstrated that the Lorentz force acting on the electron particle in the Bohr's hydrogen atom, as well as the classical radiation energy of that atom, tends to be zero on condition both the electric and magnetic fields in the atom are considered in a definite quantum state. The ratio of the mentioned fields becomes of importance for discussion of the occurence of the electron spin.
    • Akbarali Rasulov; Nodirbek Ibroximov
    • 摘要: The investigation is generalized to clusters with sizes up to 3000 atoms, covering this way the range of sizes experimentally available for low energy cluster beam deposition. The atomic scale modeling is carried on by both Molecular Dynamics and Metropolis Monte Carlo. This represents a huge series of simulations (175 cases) to which further calculations are added by spot when finer tuning of the parameters is necessary. Analyzing the results is a major task which is still in progress. This way, not only a realistic range of sizes is covered, but also the whole range of compositions and the temperature range relevant to the solid and the liquid states.
    • Espen Gaarder Haug
    • 摘要: We suggest that the Lamb shift can be approximated by a very simple function that seems accurate enough for most experimental researchers working with elements where the relativistic effects of the electron are minimal, that is up to element 80 or so. Even if our new approximation does not show anything new in quantum chemistry per se, we think that it can be useful for experimental researchers and students of both quantum physics and chemistry;now everyone can calculate the Lamb shift on the back of an envelope.
    • Jaouad Kharbach; Walid Chatar; Mohamed Benkhali; Abdellah Rezzouk; Mohammed Ouazzani-Jamil
    • 摘要: In this paper, the integrable classical case of the Hydrogen atom subjected to three static external fields is investigated. The structuring and evolution of the real phase space are explored. The bifurcation diagram is found and the bifurcations of solutions are discussed. The periodic solutions and their associated periods for singular common-level sets of the first integrals of motion are explicitly described. Numerical investigations are performed for the integrable case by means of Poincaré surfaces of section and comparing them with nearby living nonintegrable solutions, all generic bifurcations that change the structure of the phase space are illustrated;the problem can exhibit regularity-chaos transition over a range of control parameters of system.
    • Lyudmila Alexeyeva
    • 摘要: Private monochromatic solutions of the free-field equation of electro-gravimagnetic charges and currents are constructed in the differential algebra of biquaternions, which describe elementary particles as standing electro-gravimagnetic waves. The two classes of solutions of this biquaternionic wave equation have been investigated, generated by scalar potentials (pulsars) and vectorial potentials (spinors). Their asymptotic properties are considered, on the base of which they are classified into heavy (boson) and light (lepton) elementary particles. The biquaternion representation of the hydrogen atom is given. The periodic system of elements is produced, which is built on the principle of the musical structure of a simple gamma.
    • Hrant N. Yeritsyan; Aram A. Sahakyan; Norair E. Grigoryan; Vachagan V. Harutyunyan; Bagrat A. Grigoryan; Gayane A. Amatuni; Arsham S. Yeremyan; Christopher J. Rhodes
    • 摘要: This paper reports results from an investigation of the interaction of displaced Si-self atoms (I) and their vacancies (V), with impurities in crystalline silicon (Si), as induced by micro-second pulse duration irradiation with electrons at different energies: 3.5, 14, 25 and 50 MeV and pico-second pulse duration with energy 3.5 MeV. V-V, I-impurity atom and V-impurity atom interactions are analyzed both experimentally and as modeled using computer simulations. A process of divacancy (V2) accumulation in the dose-dependent linear region is investigated. The effect of impurities on recombination of correlated divacancies, and I-atoms that had become displaced from regular lattice points is estimated by computer modeling of an appropriate diffusion-controlled process. It is concluded that the experimental results can be interpreted quantitatively in terms of a strongly anisotropic quasi-one-dimensional diffusion of displaced I-atoms. In addition, a significant difference is found between the effects of pico-second duration electron beam irradiation, which causes the formation of A-centre (V + Oxygen) clusters, while when the beam is applied on a micro-second timescale, divacancies are created instead, although the electrons have the same energy in both cases.
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