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[en] A brief description of different structure types of the known high-Tc the CuO5 pyramid or CuO6 octahedra planes, that with the combination of the three units, various structure types of layered cuprate could be obtained. Based on the above ideas, new compounds of Pb-2222 (PbBaSr (NdCe)2 Cu3Oy), Ta-1222 and LaBa (NdCe)2 Cu3Oy have been designed and successfully prepared. Finally, the possible directions of the search of new oxide superconductors have been proposed
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[en] The recent progress in the experiments and theoretical descriptions of the nuclear Drell-Yan Process is presented. (16 figs., 51 refs.)
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[en] Applying the MIT boundary condition to the moving bag surface, the author developed a framework for quantum bag dynamics. The author has found something interesting. For examples, for satisfying the MIT boundary condition on the moving surface, the gluon field in the bag must include a longitudinal component. The quark number and gluon number operators in the bag enclosed by its moving surface are non-hermitian. Nevertheless their eigenvalues are still non negative integers, but their eigenfunctions are no longer orthogonal to each other in the usual hermitian sense. The dynamics of the bag driven by the quark-gluon system in it looks like that described by a hadron field theory, except that a nonlocal structure of vertices should be calculated according to its extended quark-gluon structure. The author expected that after a reparametrization according to its dynamical structure, this framework may be used to study hadron physics and nuclear physics both on the quark-gluon level and on the hadron level. The quantum bag dynamics is also an example of quantum field theory in a moving cavity with the field cavity coupling
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[en] More than half a million Z degree decays have been collected and analyzed by The four LEP experiments, OPAL, ALEPH, L3 and DELPHI, during the first year operation. One of the main goals of these experiments is to test the Standard Model by the precision measurement of the Z degree parameters. A summary of the L3 experimental results is presented to show the precision reached by LEP experiments and the good consistency between the Standard Model prediction of these parameters and the measured values
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[en] Strange matter is conjectured to be more stable than nuclear matter, and strange stars may exist. Recent developments in strange star physics are reviewed in this paper, where we pay particular attention to the differences between strange stars and neutron stars
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[en] Based on the experimental results and theoretical experience in nuclear physics, the article has explored the basic physical ideas and theoretical methods in nuclear and quantum many-body correlation dynamics. The main theoretical results and important applications are introduced briefly. The paper addresses the fundamental ingredients and physical interpretation of theoretical results in a comprehensive way. Recent new results about correlation dynamics in quantum field theories are also presented. The perspectives of further application are viewed. (91 refs.)
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[en] Since the project on next generation linear collider (LC) was proposed in the middle of 1980s, great progress on it had been made. R and D on LC structure are described. Various structures to suppress the long-range wake field within a train of bunches were suggested. And two kinds of them remain to be the actual candidates. One is 'damped structure' and the other is 'detuned structure'. The current status on LC structure at SLAC and KEK are also described
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[en] X-ray Lithography is an important micro-lithographic technology for submicron application in the future. Recently the application of synchrotron radiation X-ray source is a great progress of X-ray Lithography. This paper describes the position and importance of Synchrotron Radiation X-ray Lithography in microelectronic technology, its status and main technical problems. The development of Synchrotron Radiation X-ray Lithography in China is also introduced
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[en] It is desired to construct a e+ e- linear collider in Tev energy region for high energy physics. So an electron linear accelerator of Tev energy with high-gradient of 100 MV/m is needed. The problems concerning the working frequency, the structure and parameters for electron linacs, the new RF power generation, pulse compression system and two beam accelerators are introduced
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[en] Electron momentum spectroscopy will become one of the main methods of new generation for studying structure of matter. It possesses special virtues as it is used to the study of atomic and molecular structure and the optical, electronic and magnetic properties of solid film. The experimental and theoretical works for it have been gone ahead for many years in the developed countries, and the excellent results have been obtained. Many physicists and chemists predict that electron momentum spectroscopy will get more progresses in the next decade and its results will be applied to some scientific fields. This study in China has also got good progresses. The elemental principle of electron momentum spectroscopy, its experimental and theoretical methods, existed progresses and applications have been described shortly
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