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Existence of the solutions and the attractors for the large-scale atmospheric equations

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Science China Earth Sciences 2006年第6期49卷 650-660页

作者： HUANG Haiyang1 & GUO Boling2.1. department of Mathematics, Beijing normal {2., Beijing 100875, China 2. Institute of Applied {3. and Computational Mathematics, Beijing 100080, China 1. department of Mathematics Beijing Normal University Beijing 100875 China 2. Institute of Applied physics and Computational Mathematics Beijing 100080 China

In this paper, firstly, the proper function space is chosen, and the proper expression of the operators is introduced such that the complex large-scale atmospheric motion equations can be described by a simple and abstract equation, by which the definition of the weak solution of the atmospheric equations is made. Secondly, the existence of the weak solution for the atmospheric equations and the steady state equations is proved by using the Galerkin method. The existence of the non-empty global attractors for the atmospheric equations in the sense of the Chepyzhov-Vishik’s definition is obtained by constructing a trajectory attractor set of the atmospheric motion equations. The result obtained here is the foundation for studying the topological structure and the dynamical behavior of the atmosphere attractors. Moreover, the methods used here are also valid for studying the other atmospheric motion models.

关键词： atmosphere equations, weak solution, trajectory attractor, global attractor, equilibrium.

CONVERGENCE IN THE CHEMOSTAT MODELWITH DELAYED RESPONSE IN GROWTH

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Systems Science and Mathematical Sciences 1999年第1期12卷 23-32页

作者： WANG Wendi (department of Mathematics, southwest normal university,{2., China)MA Zhien (department of Mathematics, Xi’an Jiaotong university, Xi’an 710049, China) 西南师范大学数学系重庆西安交通大学数学系陕西西安

The asymptotic behavior of solutions of a model for competition between two microorganisms in the chemostat is studied. The model incorporates time delays that allow for cellular components of each competing species to be structured to include unassimilated or stored nutrient and allow uptake functions to be nonmonotone. By introducing two auxiliary functions and using fluctuation lemma, it is shown that at most one competitor survives, and the substrate and the surviving competitor (if one exists), approach limiting values. Our results indicate this kind of time delays do not influence the competitive outcome except for a critical case. The main results of S. F. Ellermeyer[1] are improved on and extended.

关键词： Chemostat competition time delays global dynamics.

袁家军胡衡华王炯程丽华会见出席2.2.重庆国际友好城市合作大会重要嘉宾

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重庆与世界 2024年第5期 16-19页

作者： chongqing Daily 重庆日报

5月2.日上午，市委书记袁家军，市委副书记、市长胡衡华，市人大常委会主任王炯，市政协主席程丽华会见了来渝出席2.2.重庆国际友好城市合作大会的3.个国家48个城市的重要嘉宾。老挝占巴塞省省委书记兼省长阿伦赛·顺那拉，白俄罗斯明...

5月2.日上午，市委书记袁家军，市委副书记、市长胡衡华，市人大常委会主任王炯，市政协主席程丽华会见了来渝出席2.2.重庆国际友好城市合作大会的3.个国家48个城市的重要嘉宾。老挝占巴塞省省委书记兼省长阿伦赛·顺那拉，白俄罗斯明斯克州执行委员会主席图尔钦·亚历山大，

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Magnetic mineralogy of the Hongqiling Cu-Ni sulphide deposit: Implications for ore genesis

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Progress in Natural Science:Materials International 2007年第10期17卷 1192-1198页

作者： Xi Aihua1,2. Ge Yuhui1, Cai Yuanfeng2.and Zhang Xuefeng3.1. Faculty of Resources & Environment, southwest Petroleum {3., Chengdu 610500, China 2. State Key Laboratory for Endogenic Metal Deposit Research, Nanjing {3., Nanjing 2.0093. China 3. {3. of Natural Resources & Technology Information, China {3. of Petroleum, Beijing 102.49, China) Faculty of Resources & Environment Southwest Petroleum University Chengdu 610500 China State Key Laboratory for Endogenic Metal Deposit Research Nanjing University Nanjing 210093 China department of Natural Resources & Technology Information China University of Petroleum Beijing 102249 China

Pyrrhotite is one of the common ore minerals in Cu-Ni sulphide deposits, but only monoclinic pyrrhotite is ferromagnetic at room temperature. X-ray and EPA analyses reveal that most pyrrhotite forming sideronitic texture in the Hongqiling Cu-Ni sulphide deposit is monoclinic, but that in the massive ore is a mixture of monoclinic and hexagonal pyrrhotites. Differential thermal and magnetic- thermogravimetric analyses of massive ore indicate a magnetic transition and heat absorption at 3.0}℃, suggesting that this temperature is the thermomagnetic and phase transition point of pyrrhotite. For massive pyrrhotite ores heated at 400oC for 3. h and then quenched by cool water, the monoclinic pyrrhotite (mpo) transforms completely into the hexagonal pyrrhotite (hpo). However, all the pyrrhotites resulting from slow cooling of the sample in air are mpo. These results indicate that transformation between hpo and mpo depends upon the cooling rate. Therefore, massive ores in this deposit might have been formed via rapid cooling of ore melts. On the other hand, it is significant to study the effect of the ratio of the magnetite in total ores on the genesis of magmatic Cu-Ni suphide deposits.

关键词： pyrrhotite magnetite genesis of Cu-Ni sulphide deposit Hongqiling.

From the Green's Function in Tight-Binding Representation to Interatomic Many-body Potentials

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Journal of Materials Science & Technology 1999年第4期15卷 315-319页

作者： Shaojun LIU(department of physics, Beijing {2. {3., Beijing 100875, China)Xiaobo WEI(department of physics, Liuzhou College of Education, Liuzhou 545005, China)Zhaodou CHEN Jun CAI and Benkun MA(department of physics, Beijing {2. {3., Beijing normal Univ Dept Phys Beijing 100875 Peoples R China Liuzhou Coll Educ Dept Phys Liuzhou 545005 Peoples R China

In this paper, we deduce the analytical form of many-body interatomic potentials based on the Green's function in tight-binding representation. The many-body potentials are expressed as the functions of the hopping integrals which are the physical origin of cohesion of atoms. For thesimple case of s-valent system, the inversion of the many-body potentials are discussed in detail by using the lattice inversion method.

关键词： Rev Li Chen From the Green’s Function in Tight-Binding Representation to Interatomic Many-body Potentials body

Estimating surface evapotranspiration using combined MODIS and CBERS-02.data

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Science China(Technological Sciences) 2005年第S2期48卷 145-160页

作者： XIN Xiaozhou1,2. LIU Qinhuo1, TANG Yong1,3. TIAN Guoliang1, GU Xingfa1, LI Xiaowen1,2. ZHENG Hongsheng4 & CHEN Jiayi4 1. State Key Laboratory of Remote Sensing Science, Institute of Remote Sensing Applications, Chinese Academy of Sciences, Beijing 100101, China 2. Research Center for Remote Sensing and GIS, {3. of Geography, Beijing normal {2., Beijing 100875, China 3. Graduate {2. of Chinese Academy of Sciences, Beijing 10003., China 4. {3. of Atmospheric physics, Peking {2., Beijing 100871, China 1. State Key Laboratory of Remote Sensing Science Institute of Remote Sensing Applications Chinese Academy of Sciences 100101 Beijing China2. Research Center for Remote Sensing and GIS Department of Geography Beijing Normal University 100875 Beijing China3. Graduate University of Chinese Academy of Sciences 100039 Beijing China4. Department of Atmospheric Physics Peking University 100871 Beijing China

Spatial scale error is one of the most serious problems in the estimates of land surface heat fluxes of sensible and latent from satellite-borne data such as MODIS 1km resolution reflectance and emissive data. One of the feasible and economic ways to decrease the spatial scale error is to use high resolution land use class data together with the MODIS data. CBERS-02.data were used to produce land use class of Baiyangdian area, Hebei Province, China in the autumn of 2.04. The area ratio of each class in MODIS pixel was calculated, and used to derive the heat fluxes of the mixed pixel. The results showed that the estimated heat fluxes of soil, sensible and latent have been changed remarkably after using the high resolution land class data. It could be concluded from the comparison between simulated and ground-measured fluxes as well as the theoretical analysis that high resolution land class data are useful to diminishing the scale error of heat fluxes estimated from low resolution satellite data.

关键词： surface evapotranspiration spatial scale error MODIS CBERS land class.

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Object as Agent

西南师范大学学报（自然科学版） 1998年第5期23卷 11-19页

作者： Zhang Xiaozhen, female, 53.years old, professor. Zhang Xiaozhen, He Jiang Computer Science department, southwest normal university,{2.

Ｉｎｏｂｊｅｃｔｏｒｉｅｎｔｅｄｄｅｓｉｇｎ（ＯＯＤ），ｔｈｅｃｏｎｃｅｐｔｏｆｏｂｊｅｃｔｇｅｎｅｒａｌｙｒｅｆｅｒｓｔｏｔｈｅｏｂｊｅｃｔｏｆａｃｔｉｏｎ，ｗｈｉｃｈｉｓｉｔｓｎａｉｖｅＥｎｇｌｉｓｈｍｅａｎ... 详细信息

Ｉｎｏｂｊｅｃｔｏｒｉｅｎｔｅｄｄｅｓｉｇｎ（ＯＯＤ），ｔｈｅｃｏｎｃｅｐｔｏｆｏｂｊｅｃｔｇｅｎｅｒａｌｙｒｅｆｅｒｓｔｏｔｈｅｏｂｊｅｃｔｏｆａｃｔｉｏｎ，ｗｈｉｃｈｉｓｉｔｓｎａｉｖｅＥｎｇｌｉｓｈｍｅａｎｉｎｇ（Ｔｈｅ‘ｏｂｊｅｃｔ’ｉｎ...

关键词： object agential object algorithmic skeleton

Simultaneously inducing synthesis of semiconductor selenium multi-armed nanorods and nanobars through bio-membrane bi-templates

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Science China Chemistry 2004年第6期47卷 507-511页

作者： LI Li1, WU Qingsheng1 DING Yaping2.& LI Ping3.1. department of Chemistry, Tongji university, Shanghai 2.0092. China 2. department of Chemistry, Shanghai university, Shanghai 2.043., China 3. department of Food, Anhui Agricultural university, Hefei 2.003., China 1. department of Chemistry Tongji University 200092 Shanghai China 2. department of Chemistry Shanghai University 200436 Shanghai China 3. department of Food Anhui Agricultural University 230036 Hefei China

Multi-armed nanorods and nanobars of semiconductor selenium were simultane- ously synthesized in the light of biomineralization process through bio-membrane bi-templates of rush at room temperature. The multi-armed nanorods are 60 nm in diameter and 1.5 μm in length; the nanobars are 150 nm in diameter and 1000—1100 nm in length. The XRD pattern indicates that these nanocrystals were crystallized in the hexagonal structure with lattice constants a = 0.43. nm, c = 0.495 nm. The possible formation mechanism was investigated.

关键词： selenium, multi-armed nanorods, nanobars, bio-membrane, bi-templates.

Pressure-induced crystallite breaking in La_(0.7)Sr_(0.3.Mn_(0.9)Fe_(0.1)O_3.nanosolids

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Chinese Science Bulletin 1998年第6期43卷 458-461页

作者： ZHENG Fanlei 1, 2. SUI Yu 1, 3. XU Dapeng 1 and SU Wenhui 1, 4 1. department of physics, Jilin {2., Changchun 13.02., China 2. Changchun Institute of physics, Chinese Academy of Sciences, Changchun 13.02., China 3. Institute of Metal R department of physics Jilin University Changchun Chinas Changchun Institute of physics Chinese Academy of Sciences Changchun China Institute of Metal Research Chinese Academy of Sciences Shenyang China International Center for Materials physics Chinese Academy of Sceinces Shenyang China Center for Condensed Matter and Radiation physics CCAST (World Lab.) Beijing China

In the compacting process of the La 0.7Sr 0.3.n 0.9Fe 0.1O 3.nanosolids under the pressure range of 0.0-4.5 GPa, the apparent pressure-induced crystallite breaking phenomenon in these nanosolids was observed. With increasing pressure up to 4.5 GPa, the average grain size decreases by 46% while the magnetization of nanosolids decrease by 40% and their coercive increases by 3.%. This kind of breaking has a close relation to the existence of oxygen deficiency in La 0.7Sr 0.3.n 0.9Fe 0.1O 3.nanoparticles. A simple and convenient method for preparing the bulk nanosolids with a large number of clean interfaces has been suggested.

关键词： nanosolid pressure-induced breaking high pressure.