The commonly used discretization approaches for distributed hydrological models can be broadly categorized into four types,based on the nature of the discrete components:Regular Mesh,Triangular Irregular Networks(TINs...The commonly used discretization approaches for distributed hydrological models can be broadly categorized into four types,based on the nature of the discrete components:Regular Mesh,Triangular Irregular Networks(TINs),Representative Elementary Watershed(REWs) and Hydrologic Response Units(HRUs).In this paper,a new discretization approach for landforms that have similar hydrologic properties is developed and discussed here for the Integrated Hydrologic Model(IHM),a combining simulation of surface and groundwater processes,accounting for the interaction between the systems.The approach used in the IHM is to disaggregate basin parameters into discrete landforms that have similar hydrologic properties.These landforms may be impervious areas,related areas,areas with high or low clay or organic fractions,areas with significantly different depths-to-water-table,and areas with different types of land cover or different land uses.Incorporating discrete landforms within basins allows significant distributed parameter analysis,but requires an efficient computational structure.The IHM integration represents a new approach interpreting fluxes across the model interface and storages near the interface for transfer to the appropriate model component,accounting for the disparate discretization while rigidly maintaining mass conservation.The discretization approaches employed in IHM will provide some ideas and insights which are helpful to those researchers who have been working on the integrated models for surface-groundwater interaction.展开更多
The XYZ antiferromagnetic model in linear spin-wave frame is shown explicitly to have an su（1,2） algebraic structure： the Hamiltonian can be written as a linear function of the su（1,2） algebra generators. Based o...The XYZ antiferromagnetic model in linear spin-wave frame is shown explicitly to have an su（1,2） algebraic structure： the Hamiltonian can be written as a linear function of the su（1,2） algebra generators. Based on it, the energy eigenvalues are obta/ned by making use of the similar transformations, and the algebraic diagonalization method is investigated. Some numerical solutions are given, and the results indicate that only one group solution could be accepted in physics.展开更多
This paper aims to study the principal-agent relationship between investors and venture capitalists （VCs）, makes research on the moral hazard issues under this relationship, and how to design an effective incentive ...This paper aims to study the principal-agent relationship between investors and venture capitalists （VCs）, makes research on the moral hazard issues under this relationship, and how to design an effective incentive mechanism to avoid it. By constructing a new incentive model, this paper provides the reference for investors to establish a reasonable payment contract. The designed incentive contract is a kind of dominant consecutive payment mode, which plays a strong incentive role to the VCs, in addition, it also requires the VCs to invest certain capital to the project, which can effectively prevent the slapdash action of VCs, and reduce the agent cost of investors.展开更多
Military talents are those who have higher culture and scientific quality, much strong innovation consciousness and thinking ability. The overall objective of military talent training is to cultivate the comprehensive...Military talents are those who have higher culture and scientific quality, much strong innovation consciousness and thinking ability. The overall objective of military talent training is to cultivate the comprehensive-quality military personnel that meet the requirements of military modernization and preparations for military struggle. In this paper, we construct the military talent training objectives model, and on this basis, we propose the innovative military talent training mode, from the perspective of curriculum content system and talent quality assurance system.展开更多
By studying modular invariance properties of some characteristic forms,we prove some new anomaly cancellation formulas which generalize the Han-Zhang and Han-Liu-Zhang anomaly cancellation formulas.
Establishing a philosophical theory or a paradigm of philosophical understanding should be premised on its possession of a relatively well-defined research subject, relatively original research methodology, and relati...Establishing a philosophical theory or a paradigm of philosophical understanding should be premised on its possession of a relatively well-defined research subject, relatively original research methodology, and relatively outstanding theoretical objectives. In this regard, philosophy of culture aims at a general understanding of man through cultural symbols which in themselves are not the end of the research. Using the research methodology of historical science, philosophy of culture attempts to understand man as a non-continuous and heterogeneous being. The theoretical objective of philosophy of culture is the criticism and reconstruction of cultural patterns with cultural symbols at their core.展开更多
基金Under the auspices of National Natural Science Foundation of China(No.40901026)Beijing Municipal Science & Technology New Star Project Funds(No.2010B046)+1 种基金Beijing Municipal Natural Science Foundation(No.8123041)Southwest Florida Water Management District(SFWMD) Project
文摘The commonly used discretization approaches for distributed hydrological models can be broadly categorized into four types,based on the nature of the discrete components:Regular Mesh,Triangular Irregular Networks(TINs),Representative Elementary Watershed(REWs) and Hydrologic Response Units(HRUs).In this paper,a new discretization approach for landforms that have similar hydrologic properties is developed and discussed here for the Integrated Hydrologic Model(IHM),a combining simulation of surface and groundwater processes,accounting for the interaction between the systems.The approach used in the IHM is to disaggregate basin parameters into discrete landforms that have similar hydrologic properties.These landforms may be impervious areas,related areas,areas with high or low clay or organic fractions,areas with significantly different depths-to-water-table,and areas with different types of land cover or different land uses.Incorporating discrete landforms within basins allows significant distributed parameter analysis,but requires an efficient computational structure.The IHM integration represents a new approach interpreting fluxes across the model interface and storages near the interface for transfer to the appropriate model component,accounting for the disparate discretization while rigidly maintaining mass conservation.The discretization approaches employed in IHM will provide some ideas and insights which are helpful to those researchers who have been working on the integrated models for surface-groundwater interaction.
基金The project supported by National Natural Science Foundation of China under Grant Nos.10447103 and 90305026the Natural Science Foundation of Beijing under Grant No.1072010the Foundation of Education Department of Beijing under Grant No.KM200610772007
文摘The XYZ antiferromagnetic model in linear spin-wave frame is shown explicitly to have an su（1,2） algebraic structure： the Hamiltonian can be written as a linear function of the su（1,2） algebra generators. Based on it, the energy eigenvalues are obta/ned by making use of the similar transformations, and the algebraic diagonalization method is investigated. Some numerical solutions are given, and the results indicate that only one group solution could be accepted in physics.
文摘This paper aims to study the principal-agent relationship between investors and venture capitalists （VCs）, makes research on the moral hazard issues under this relationship, and how to design an effective incentive mechanism to avoid it. By constructing a new incentive model, this paper provides the reference for investors to establish a reasonable payment contract. The designed incentive contract is a kind of dominant consecutive payment mode, which plays a strong incentive role to the VCs, in addition, it also requires the VCs to invest certain capital to the project, which can effectively prevent the slapdash action of VCs, and reduce the agent cost of investors.
文摘Military talents are those who have higher culture and scientific quality, much strong innovation consciousness and thinking ability. The overall objective of military talent training is to cultivate the comprehensive-quality military personnel that meet the requirements of military modernization and preparations for military struggle. In this paper, we construct the military talent training objectives model, and on this basis, we propose the innovative military talent training mode, from the perspective of curriculum content system and talent quality assurance system.
基金supported by Fok Ying Tong Education Foundation (Grant No.121003)
文摘By studying modular invariance properties of some characteristic forms,we prove some new anomaly cancellation formulas which generalize the Han-Zhang and Han-Liu-Zhang anomaly cancellation formulas.
文摘Establishing a philosophical theory or a paradigm of philosophical understanding should be premised on its possession of a relatively well-defined research subject, relatively original research methodology, and relatively outstanding theoretical objectives. In this regard, philosophy of culture aims at a general understanding of man through cultural symbols which in themselves are not the end of the research. Using the research methodology of historical science, philosophy of culture attempts to understand man as a non-continuous and heterogeneous being. The theoretical objective of philosophy of culture is the criticism and reconstruction of cultural patterns with cultural symbols at their core.
