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Search Results: 1 - 10 of 83892 matches for " Yang Sun "
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The Research on the Analysis and Application of Detecting Underground Civil Air Defense with GPR  [PDF]
Yongqing Yang, Xiaohui Sun
World Journal of Engineering and Technology (WJET) , 2015, DOI: 10.4236/wjet.2015.33C008

On the basis of the principle of Ground Penetrating Radar (GPR) method and geophysical characteristics, this paper discusses in detail detection method of civil air defense distinguished by GPR under the complex geological condition through using the analysis and application in the survey of underground civil air defense as an example. Three dimensional image of the defense clearly reflects its underground structure. Test result has the greatly high detection precision. This example illustrates the effectiveness and practicability of GPR in the respect of detection of the civil air defense and also accumulates experiences for the application of GPR in urban geological survey.

Research on Full-Time Master of Mathematics Education Candidates’ Cognition of Dissertation  [PDF]
Zezhong Yang, Dandan Sun
Open Journal of Social Sciences (JSS) , 2015, DOI: 10.4236/jss.2015.310007
Abstract: This research focused on the cognition of full-time candidates of master of mathematics education to their dissertation, and adopted open-ended structure questionnaire. There were 94 participants from 11 normal universities in Mainland China. The questionnaires were sent to them by e-mail. The results indicated the majority of candidates thought: 1) The dissertation was a paper with rational structure (78.38%); 2) The characteristic of good master dissertation was that its view was usually original (71.62%) and valuable and its content was rich (64.85%); 3) Reading more relevant literature to understand research status (98.65%) and learning more fundamental theories (75.68%) was necessary before writing dissertation; 4) They should refer the form of relevant dissertation usually when writing dissertation (72.97%). So it was obvious that many candidates’ cognition about dissertation and its preparing and writing was quite superficial, some of them were even false.
Nuclear masses near the proton drip-line and their impact on nucleosynthesis in explosive stars
Yang Sun
Chinese Science Bulletin , 2009, DOI: 10.1007/s11434-009-0704-3
A small difference in nuclear mass could make a big impact in the cosmos
Yang Sun
Chinese Science Bulletin , 2011, DOI: 10.1007/s11434-011-4521-0
Projected shell model description for nuclear isomers
Sun, Yang;
Revista mexicana de física , 2008,
Abstract: the study of nuclear isomer properties is a current research focus. to describe isomers, we present a method based on the projected shell model. two kinds of isomers, k-isomers and shape isomers, are discussed. for the k-isomer treatment, k-mixing is properly implemented in the model. it is found however that in order to describe the strong k-violation more efficiently, it may be necessary to further introduce triaxiality into the shell model basis. to treat shape isomers, a scheme is outlined which allows mixing those configurations belonging to different shapes.
Projected shell model description for nuclear isomers
Yang Sun
Revista mexicana de física , 2008,
Abstract: Se estudian las propiedades de isómeros nucleares a través del modelo de capas proyectadas. Se discutan isómeros K y de forma nuclear. Para discutir las propiedades de los isómeros K se tiene que incluir la mezcla de diferentes valores K en el modelo así como la deformación triaxial. A los isómeros de forma se pueden tratar en un modelo que permita la mezcla de configuraciones con formas nucleares distintas.
Does Strategies of Industrial Development Cause Spatial Convergence: Evidences from Changsanjiao, Zhusanjiao and Huanbohai of China
Yang SUN
Canadian Social Science , 2012, DOI: 10.3968/j.css.1923669720120802.2710
Abstract: Three topics, “the convergence of the economic growth”, “the influences of regional industrial development strategies to the economic development”, and “spatial effects in regional growth” are studied in the empirical analysis. Spatial panel data model and the nonnested tests of spatial structure are first used in the studies of China cities’ spatial structures. Empirical results show there are β-convergences in “Changsanjiao” and “Huanbohai” districts during 1990-1998 and the adjustments of the regional industrial development strategies adapting to the regional endowments play important parts in the economic growth. Meanwhile, the growths of the cities in the three districts have signifi cant spatial effects that cities with similar per capita GDP levels promote each other in their growth processes. Key words: Spatial convergence; Strategies of regional industrial development; Spatial effects Résumé Il y a trois thèmes, qui sont ‘‘la convergence de la croissance économique’’, ‘‘les influences de stratégies régionales en matière de développement industriel au développement économique’’, et ‘‘Les effets spatiaux de la croissance régionale’’ sont étudiés dans l’analyse empirique. Les données de la Spatiale en modèle de panel modèle et les tests non embo tés de la structure spatiale sont d’abord utilisées dans les études de structures spatiales de la Chine des villes. Les résultats empiriques montrent qu’il ya des convergences dans ‘‘La Zone triangulaire’’ et la zone de ‘‘Huanbohai’’ au cours de 1990-1998 et les ajustements des stratégies régionales de développement industriel à s'adapter à des dotations régionales jouent des r les importants dans la croissance économique. Pendant ce temps, les croissances des villes dans les trois districts ont d'importants effets spatiaux que les villes avec des niveaux similaires par PIB par habitant de promouvoir les uns des autres dans leurs processus de croissance. Mots clés: Convergence spatiale; Stratégies de développement industriel régional; Effets spatiaux
Projected shell model description for nuclear isomers
Yang Sun
Physics , 2008,
Abstract: Nuclear isomer is a current research focus. To describe isomers, we present a method based on the Projected Shell Model. Two kinds of isomers, K-isomers and shape isomers, are discussed. For the K-isomer treatment, K-mixing is properly implemented in the model. It is found however that in order to describe the strong K-violation more efficiently, it may be necessary to further introduce triaxiality into the shell model basis. To treat shape isomers, a scheme is outlined which allows mixing those configurations belonging to different shapes.
Projected shell model study on nuclei near the N = Z line
Yang Sun
Physics , 2002, DOI: 10.1140/epja/i2002-10339-6
Abstract: Study of the N ~ Z nuclei in the mass-80 region is not only interesting due to the existence of abundant nuclear structure phenomena, but also important in understanding the nucleosynthesis in the rp-process. It is not feasible to apply a conventional shell model due to the necessary involvement of the g_{9/2} sub-shell. In this paper, the projected shell model is introduced to this study. Calculations are systematically performed for the collective levels as well as the quasi-particle excitations. It is demonstrated that calculations with this truncation scheme can achieve a comparable quality as the large-scale shell model diagonalizations for 48Cr, but the present method can be applied for much heavier mass regions. While the known experimental data of the yrast bands in the N ~ Z nuclei (from Se to Ru) are reasonably described, the present calculations predict the existence of K-isomeric states, some of which lie low in energy under certain structure conditions.
Shell model for heavy nuclei and its application in nuclear astrophysics
Yang Sun
Physics , 2006, DOI: 10.1142/S0218301306005307
Abstract: Performing shell model calculations for heavy nuclei is a long-standing problem in nuclear physics. The shell model truncation in the configuration space is an unavoidable step. The Projected Shell Model (PSM) truncates the space under the guidance of the deformed mean-field solutions. This implies that the PSM uses a novel and efficient way to bridge the two conventional methods: the deformed mean-field approximations, which are widely applied to heavy nuclei but able to describe the physics only in the intrinsic frame, and the spherical shell model diagonalization method, which is most fundamental but feasible only for small systems. We discuss the basic philosophy in construction of the PSM (or generally PSM-like) approach. Several examples from the PSM calculations are presented. Astrophysical applications are emphasized.
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