Biochemical mechanism of forming the red tide is discussed in this paper. The existence of a large number of nitrates and phosphates in the eutrophic water is the prerequisite of explosive increase of algae and the fo...Biochemical mechanism of forming the red tide is discussed in this paper. The existence of a large number of nitrates and phosphates in the eutrophic water is the prerequisite of explosive increase of algae and the forming of red tide. Reduction of eutrophication is an important approach to preventing the red tide. The method of deep treatment of the waste water and its denitrification and dephosphorization are introduced, and a new opinion on the red tide formation and fundamental prevention is put forward.展开更多
The analysis of the interaction of hydrogen, nitrogen （and their isotopes） with tungsten is important, since this material is a strong candidate to form the first wall of fusion reactors for both magnetic and inerti...The analysis of the interaction of hydrogen, nitrogen （and their isotopes） with tungsten is important, since this material is a strong candidate to form the first wall of fusion reactors for both magnetic and inertial confinement, and these atoms have a very sensitive （desired and unwanted） interaction with it. For this purpose, we study the effects and electronic state densities of atomic hydrogen and nitrogen in pure tungsten, in order to analyze some important properties such as the density of states of the system. Focusing on this application, this work is a preliminary study of the behavior of atoms of hydrogen and nitrogen, on a surface of tungsten on the three sites of the cell： top, hollow and bridge. We use a program simulation based on the DFT （density functional theory） implemented in the Open-Source Code Quantum Espresso, in order to obtain the adsorption energy and the density of states of the systems.展开更多
文摘Biochemical mechanism of forming the red tide is discussed in this paper. The existence of a large number of nitrates and phosphates in the eutrophic water is the prerequisite of explosive increase of algae and the forming of red tide. Reduction of eutrophication is an important approach to preventing the red tide. The method of deep treatment of the waste water and its denitrification and dephosphorization are introduced, and a new opinion on the red tide formation and fundamental prevention is put forward.
文摘The analysis of the interaction of hydrogen, nitrogen （and their isotopes） with tungsten is important, since this material is a strong candidate to form the first wall of fusion reactors for both magnetic and inertial confinement, and these atoms have a very sensitive （desired and unwanted） interaction with it. For this purpose, we study the effects and electronic state densities of atomic hydrogen and nitrogen in pure tungsten, in order to analyze some important properties such as the density of states of the system. Focusing on this application, this work is a preliminary study of the behavior of atoms of hydrogen and nitrogen, on a surface of tungsten on the three sites of the cell： top, hollow and bridge. We use a program simulation based on the DFT （density functional theory） implemented in the Open-Source Code Quantum Espresso, in order to obtain the adsorption energy and the density of states of the systems.
