The multi-configuration Dirac-Fock method is employed to calculate the transition energies, probabilities, and oscillator strengths for electric dipole allowed （El） and forbidden （M1, E2, M2） lines for the 3s^23p,...The multi-configuration Dirac-Fock method is employed to calculate the transition energies, probabilities, and oscillator strengths for electric dipole allowed （El） and forbidden （M1, E2, M2） lines for the 3s^23p, 3s3p^2, 3s^23d, 3p^3, and 3s3p3d configurations of Fe XIV. The lifetimes of all 40 levels of these low-lying configurations are also derived. The valence valence and core-valence correlation effects are accounted for in a systematic way. Breit interactions and quantum electrodynamics （QED） effects are estimated in subsequent relativistic configuration interaction （CI） calculations. The present results are in good agreement with other available theoretical and experimental values, and therefore can be used for the further astrophysical investigations.展开更多
The ＂XIV International Symposium on Iron Nutrition and Interactions in Plants＂ （14th ISINIP） will be held in Beijing, China, on 11-15 October 2008. It will be held together with the Annual Meeting of HarvestPlus-C...The ＂XIV International Symposium on Iron Nutrition and Interactions in Plants＂ （14th ISINIP） will be held in Beijing, China, on 11-15 October 2008. It will be held together with the Annual Meeting of HarvestPlus-China. The joint symposium will provide opportunities to scientists from soil sciences, plant nutrition, plant breeding, animal and human nutrition around the world to communicate their new results and experiences in studying iron nutrition of plants, animal and human for a better understanding of the mechanisms of iron from soils, over plants to animals and human beings. The scientific topics of the symposium are as follows：展开更多
Cheng Guodong Cheng Guodong is a research professor at the Lanzhou Institute of Glaciology & Cryopedology, an affiliate to the CAS. A major in hydrogeology and engineering geology when studying in the Beijing Coll...Cheng Guodong Cheng Guodong is a research professor at the Lanzhou Institute of Glaciology & Cryopedology, an affiliate to the CAS. A major in hydrogeology and engineering geology when studying in the Beijing College of Geology, Prof. Cheng started his life-long career of a permafrost specialist after having left the campus in 1965. His research work is almost entirely carried out on the Qinghai-Tibet Plateau, covering the following three aspects: 1. Contributions to several key engineering projects in permafrost regions. At present, China has not set up standardized norms for geological surveys, engineering design and construction展开更多
I have never had much patience with thewriters who claim from the reader an effort to under-stand their meaning. You have only to go tothe great philosophers to see that it is possibleto express with lucidity the most...I have never had much patience with thewriters who claim from the reader an effort to under-stand their meaning. You have only to go tothe great philosophers to see that it is possibleto express with lucidity the most subtle reflections.You may find it difficult to understand the thoughtof Hume, and if you have no philosophical train-ing its implications will doubtless escape you;but no one with any education at all can fail tounderstand exactly what the meaning of each sen-tence is. Few people have written English withmore grace than Berkeley. There are two sortsof obscurity that you find in writers. One展开更多
基金Project supported by the National Natural Science Foundation of China (Grant Nos. 10876028,10847007,and 10964010)the Specialized Research Fund for the Doctoral Program of Higher Education of China (Grant No. 20070736001)
文摘The multi-configuration Dirac-Fock method is employed to calculate the transition energies, probabilities, and oscillator strengths for electric dipole allowed （El） and forbidden （M1, E2, M2） lines for the 3s^23p, 3s3p^2, 3s^23d, 3p^3, and 3s3p3d configurations of Fe XIV. The lifetimes of all 40 levels of these low-lying configurations are also derived. The valence valence and core-valence correlation effects are accounted for in a systematic way. Breit interactions and quantum electrodynamics （QED） effects are estimated in subsequent relativistic configuration interaction （CI） calculations. The present results are in good agreement with other available theoretical and experimental values, and therefore can be used for the further astrophysical investigations.
文摘The ＂XIV International Symposium on Iron Nutrition and Interactions in Plants＂ （14th ISINIP） will be held in Beijing, China, on 11-15 October 2008. It will be held together with the Annual Meeting of HarvestPlus-China. The joint symposium will provide opportunities to scientists from soil sciences, plant nutrition, plant breeding, animal and human nutrition around the world to communicate their new results and experiences in studying iron nutrition of plants, animal and human for a better understanding of the mechanisms of iron from soils, over plants to animals and human beings. The scientific topics of the symposium are as follows：
文摘Cheng Guodong Cheng Guodong is a research professor at the Lanzhou Institute of Glaciology & Cryopedology, an affiliate to the CAS. A major in hydrogeology and engineering geology when studying in the Beijing College of Geology, Prof. Cheng started his life-long career of a permafrost specialist after having left the campus in 1965. His research work is almost entirely carried out on the Qinghai-Tibet Plateau, covering the following three aspects: 1. Contributions to several key engineering projects in permafrost regions. At present, China has not set up standardized norms for geological surveys, engineering design and construction
文摘I have never had much patience with thewriters who claim from the reader an effort to under-stand their meaning. You have only to go tothe great philosophers to see that it is possibleto express with lucidity the most subtle reflections.You may find it difficult to understand the thoughtof Hume, and if you have no philosophical train-ing its implications will doubtless escape you;but no one with any education at all can fail tounderstand exactly what the meaning of each sen-tence is. Few people have written English withmore grace than Berkeley. There are two sortsof obscurity that you find in writers. One
