The universal grammar was firstly promoted by the American linguist Noam Chomsky. It is about the general ideas onlanguage. One of the meanings of universal grammar is as the following. It stands for universal grammar...The universal grammar was firstly promoted by the American linguist Noam Chomsky. It is about the general ideas onlanguage. One of the meanings of universal grammar is as the following. It stands for universal grammar"the system of principles,conditions, and that are elements of all human language …the essence of the human language."The Binding Theory is one of theprinciples in the universal grammar.As one of the human language, French is well-known by its specially rigorous grammar. Thepronominal form is one of the grammar phenomenon of French. The speciality makes this grammar phenomenon a proper materialfor the analysis of the Binding Theory. This thesis will analyze the Binding Theory from the perspective of the pronominal form. Theexamples will be selected and analyzed in the thesis, and the limitation of the Binding Theory, the potential reasons which causesthe limitation, and the significance of the limitation will be analyzed. The meticulous analysis on the examples of the pronominalform from the perspective of the Binding Theory will help people in deepening the understanding and arouse further study in theuniversal grammar.展开更多
The polymer solution for polymer flooding is a viscoelastic fluid. There exist both shear flow and elongational flow when the polymer solution flows in a porous medium, where an additional dissipation is involved. The...The polymer solution for polymer flooding is a viscoelastic fluid. There exist both shear flow and elongational flow when the polymer solution flows in a porous medium, where an additional dissipation is involved. The additional dissipation caused by elongational deformation is often ignored while studying the flow of the fluid in a porous medium. For a complex polymer solution, the generated elongational pressure drop cannot be ignored. In a capillary of fixed diameter, the polymer solution is only impacted by the shear force, and its rheological property is pseudoplastic. Therefore the variable diameter capillary and the converging-diverging flow model with different cross sections are required to describe the flow characteristics of the polymer solution in porous media more accurately. When the polymer solution flows through the port, we have the elongational flow and the polymer molecules undergo elongational deformation elastically. By using the mechanical energy balance principle and the minimum energy principle, a mathematical model of non-Newtonian fluid inlet flow was established by Binding. On the basis of the Binding theory, with the application of the theory of viscoelastic fluid flow in the circular capillary and the contraction-expansion tube, the relations between the viscoelastic fluid flow rate and the pressure drop are obtained.展开更多
The thesis is designed to investigate what the Chinese reflexive transfer is and how it works on the basis of behaviorism.Through the analysis of binding theory, mismatches between Chinese reflexive and English reflex...The thesis is designed to investigate what the Chinese reflexive transfer is and how it works on the basis of behaviorism.Through the analysis of binding theory, mismatches between Chinese reflexive and English reflexive would be discussed in two main aspects, namely, long-distance binding and subject orientation. To test and support the argument, more sufficient teaching data would be processed from questionnaire. At the end of the analysis, it is supposed to put forward suggestions for teaching English reflexive to Chinese students.展开更多
We use the ab initio density functional theory to calculate the band structure, density of states, charge transfer, charge density difference, binding energy and vibration frequency. We can see that the conduction ban...We use the ab initio density functional theory to calculate the band structure, density of states, charge transfer, charge density difference, binding energy and vibration frequency. We can see that the conduction band through the Fermi level include SWNT/H_2/Li, SWNT/H_2/Al and SWNT/H_2/Ca, which shows a kind of metallic character. The charge distribution and contour plots of charge difference density of ion/H_2/SWNT show charge transfer between ion and H_2 molecules rather than between H_2 and H_2. Meanwhile, the interaction between Al, Ca and H_2 is weaker than that of Li. We can also prove that the ion is the primary reason to the increase of adsorption energy of hydrogen molecule in SWNT. Finally, we calculate the vibration frequency and don't find any imaginary frequency, which proves that the(7,0) SWNT is more stable.展开更多
To achieve the goals of the peak carbon dioxide emissions and carbon neutral,the development and utilization of sustainable clean energy are extremely important.Hydrogen fuel cells are an important system for converti...To achieve the goals of the peak carbon dioxide emissions and carbon neutral,the development and utilization of sustainable clean energy are extremely important.Hydrogen fuel cells are an important system for converting hydrogen energy into electrical energy.However,the slow hydrogen oxidation reaction(HOR)kinetics under alkaline conditions has limited its development.Therefore,elucidating the catalytic mechanism of HOR in acidic and alkaline media is of great significance for the construction of highly active and stable catalysts.In terms of practicality,Pt is still the primary choice for commercialization of fuel cells.On the above basis,we first introduced the hydrogen binding energy theory and bifunctional theory used to describe the HOR activity,as well as the pH dependence.After that,the rational design strategies of Pt-based HOR catalysts were systematically classified and summarized from the perspective of activity descriptors.In addition,we further emphasized the importance of theoretical simulations and in situ characterization in revealing the HOR mechanism,which is crucial for the rational design of catalysts.Moreover,the practical application of Pt-based HOR catalysts in fuel cells was also presented.In closing,the current challenges and future development directions of HOR catalysts were discussed.This review will provide a deep understanding for exploring the mechanism of highly efficient HOR catalysts and the development of fuel cells.展开更多
文摘The universal grammar was firstly promoted by the American linguist Noam Chomsky. It is about the general ideas onlanguage. One of the meanings of universal grammar is as the following. It stands for universal grammar"the system of principles,conditions, and that are elements of all human language …the essence of the human language."The Binding Theory is one of theprinciples in the universal grammar.As one of the human language, French is well-known by its specially rigorous grammar. Thepronominal form is one of the grammar phenomenon of French. The speciality makes this grammar phenomenon a proper materialfor the analysis of the Binding Theory. This thesis will analyze the Binding Theory from the perspective of the pronominal form. Theexamples will be selected and analyzed in the thesis, and the limitation of the Binding Theory, the potential reasons which causesthe limitation, and the significance of the limitation will be analyzed. The meticulous analysis on the examples of the pronominalform from the perspective of the Binding Theory will help people in deepening the understanding and arouse further study in theuniversal grammar.
基金Project supported by the National Natural Science Foun-dation of China(Grant No.51574085)the Natural Science Founaation of Heilongjiang Province(Grant No.F2015020)the Science and Technology Research Project of Department of Education of Heilongjiang Province(Grant No.12521059)
文摘The polymer solution for polymer flooding is a viscoelastic fluid. There exist both shear flow and elongational flow when the polymer solution flows in a porous medium, where an additional dissipation is involved. The additional dissipation caused by elongational deformation is often ignored while studying the flow of the fluid in a porous medium. For a complex polymer solution, the generated elongational pressure drop cannot be ignored. In a capillary of fixed diameter, the polymer solution is only impacted by the shear force, and its rheological property is pseudoplastic. Therefore the variable diameter capillary and the converging-diverging flow model with different cross sections are required to describe the flow characteristics of the polymer solution in porous media more accurately. When the polymer solution flows through the port, we have the elongational flow and the polymer molecules undergo elongational deformation elastically. By using the mechanical energy balance principle and the minimum energy principle, a mathematical model of non-Newtonian fluid inlet flow was established by Binding. On the basis of the Binding theory, with the application of the theory of viscoelastic fluid flow in the circular capillary and the contraction-expansion tube, the relations between the viscoelastic fluid flow rate and the pressure drop are obtained.
文摘The thesis is designed to investigate what the Chinese reflexive transfer is and how it works on the basis of behaviorism.Through the analysis of binding theory, mismatches between Chinese reflexive and English reflexive would be discussed in two main aspects, namely, long-distance binding and subject orientation. To test and support the argument, more sufficient teaching data would be processed from questionnaire. At the end of the analysis, it is supposed to put forward suggestions for teaching English reflexive to Chinese students.
基金supported by the National Natural Science Foundation of China(11474207 and 11374217)
文摘We use the ab initio density functional theory to calculate the band structure, density of states, charge transfer, charge density difference, binding energy and vibration frequency. We can see that the conduction band through the Fermi level include SWNT/H_2/Li, SWNT/H_2/Al and SWNT/H_2/Ca, which shows a kind of metallic character. The charge distribution and contour plots of charge difference density of ion/H_2/SWNT show charge transfer between ion and H_2 molecules rather than between H_2 and H_2. Meanwhile, the interaction between Al, Ca and H_2 is weaker than that of Li. We can also prove that the ion is the primary reason to the increase of adsorption energy of hydrogen molecule in SWNT. Finally, we calculate the vibration frequency and don't find any imaginary frequency, which proves that the(7,0) SWNT is more stable.
基金support of this research by the National Natural Science Foundation of China(Nos.22179034 and 22279030)the Natural Science Foundation of Heilongjiang Province(No.ZD2023B002).
文摘To achieve the goals of the peak carbon dioxide emissions and carbon neutral,the development and utilization of sustainable clean energy are extremely important.Hydrogen fuel cells are an important system for converting hydrogen energy into electrical energy.However,the slow hydrogen oxidation reaction(HOR)kinetics under alkaline conditions has limited its development.Therefore,elucidating the catalytic mechanism of HOR in acidic and alkaline media is of great significance for the construction of highly active and stable catalysts.In terms of practicality,Pt is still the primary choice for commercialization of fuel cells.On the above basis,we first introduced the hydrogen binding energy theory and bifunctional theory used to describe the HOR activity,as well as the pH dependence.After that,the rational design strategies of Pt-based HOR catalysts were systematically classified and summarized from the perspective of activity descriptors.In addition,we further emphasized the importance of theoretical simulations and in situ characterization in revealing the HOR mechanism,which is crucial for the rational design of catalysts.Moreover,the practical application of Pt-based HOR catalysts in fuel cells was also presented.In closing,the current challenges and future development directions of HOR catalysts were discussed.This review will provide a deep understanding for exploring the mechanism of highly efficient HOR catalysts and the development of fuel cells.