To investigate contract stability in the company and farmer mode and to explore control measures of market price risk and production risk,a multiperiod game model was established in this study.Considering multiple per...To investigate contract stability in the company and farmer mode and to explore control measures of market price risk and production risk,a multiperiod game model was established in this study.Considering multiple periods and losses caused by deaths simultaneously,a stable contract price interval depending on the breaching penalty,transaction cost,spot market price,and quantity of pigs was observed.Results indicate that the higher the penalty and transaction cost savings,the better the stability of the contract;the contract price should be negotiated around the weighted average of the spot market price.When the production risk is higher,hog insurance can significantly improve the contract stability;when the market price is lower,hog price index insurance improves the contract stability by guaranteeing the company income;when the market price is higher,the profit-returning mechanism improves the stability by protecting farmers incomes.Applying three measures simultaneously results in the best stability.Examples based on data from 2014 to 2018 in Henan Province,China,were given.展开更多
Many complex dynamical networks display synchronization phenomena. We introduce a general complex dynamical network model. The model is equivalent to a simple vector model of adopting the Kronecker product. Some synch...Many complex dynamical networks display synchronization phenomena. We introduce a general complex dynamical network model. The model is equivalent to a simple vector model of adopting the Kronecker product. Some synchronization criteria,including time-variant networks and time-varying networks,are deduced based on Lyapunov's stability theory,and they are proven on the condition of obtaining a certain synchronous solution of an isolated cell. In particular,the inner-coupling matrix directly determines the synchronization of the time-invariant network; while for a time-varying periodic dynamical network,the asymptotic stability of a synchronous solution is determined by a constant matrix which is related to the fundamental solution matrices of the linearization system. Finally,illustrative examples are given to validate the results.展开更多
Human resource is already in society today one of the most important resources, the human resources stability has important implications, university should how to its important role and how to keep its stability, in t...Human resource is already in society today one of the most important resources, the human resources stability has important implications, university should how to its important role and how to keep its stability, in this thesis are introduced. In addition, concerning human resources loss and its have also means have relevant instruction, how to understand university human resources of stability,handled the problem, the university can better, faster development.展开更多
The risk assessment of contract conclusion is the primary and key part of equipment purchase contract risk management. In this paper, based on the fuzzy characteristics of contract risks, and overcoming the traditiona...The risk assessment of contract conclusion is the primary and key part of equipment purchase contract risk management. In this paper, based on the fuzzy characteristics of contract risks, and overcoming the traditional disadvantages of analytic hierarchy process （AHP）, the fuzzy analytic hierarchy process （FAHP） of contract conclusion is proposed for meeting the actual need of equipment procurement contract risk assessment, and implementing the risk factors qualitative and quantitative assessments of different working nodes in contract conclusion. Thus, a scientific and reliable important basis is provided for the risk management of equipment procurement contract.展开更多
Let （Ω＊ （M）, d） be the de Rham cochain complex for a smooth compact closed manifolds M of dimension n. For an odd-degree closed form H, there is a twisted de Rham cochain complex （Ω＊ （M）, d ＋ H∧） and its...Let （Ω＊ （M）, d） be the de Rham cochain complex for a smooth compact closed manifolds M of dimension n. For an odd-degree closed form H, there is a twisted de Rham cochain complex （Ω＊ （M）, d ＋ H∧） and its associated twisted de Rham cohomology H＊ （M, H）. The authors show that there exists a spectral sequence {Ep/r.q, dr } derived from the filtration Fp（Ω＊ （M）） = （¤i〉p Ωi（M） of Ω＊ （M）, which converges to the twisted de Rham cohomology H＊（M, H）. It is also shown that the differentials in the spectral sequence can be given in terms of cup products and specific elements of Massey products as well, which generalizes a result of Atiyah and Segal. Some results about the indeterminacy of differentials are also given in this paper.展开更多
In this paper,we study lag synchronization between two coupled networks and apply two types of control schemes,including the open-plus-closed-loop(OPCL) and adaptive controls.We then design the corresponding control a...In this paper,we study lag synchronization between two coupled networks and apply two types of control schemes,including the open-plus-closed-loop(OPCL) and adaptive controls.We then design the corresponding control algorithms according to the OPCL and adaptive feedback schemes.With the designed controllers,we obtain two theorems on the lag synchronization based on Lyapunov stability theory and Barbalat's lemma.Finally we provide numerical examples to show the effectiveness of the obtained controllers and see that the adaptive control is stronger than the OPCL control when realizing the lag synchronization between two coupled networks with different coupling structures.展开更多
基金The National Natural Science Foundation of China(No.72071039)Major Science and Technology Projects in Yunnan Province(No.202102AC080003)。
文摘To investigate contract stability in the company and farmer mode and to explore control measures of market price risk and production risk,a multiperiod game model was established in this study.Considering multiple periods and losses caused by deaths simultaneously,a stable contract price interval depending on the breaching penalty,transaction cost,spot market price,and quantity of pigs was observed.Results indicate that the higher the penalty and transaction cost savings,the better the stability of the contract;the contract price should be negotiated around the weighted average of the spot market price.When the production risk is higher,hog insurance can significantly improve the contract stability;when the market price is lower,hog price index insurance improves the contract stability by guaranteeing the company income;when the market price is higher,the profit-returning mechanism improves the stability by protecting farmers incomes.Applying three measures simultaneously results in the best stability.Examples based on data from 2014 to 2018 in Henan Province,China,were given.
基金the Science and Technology R&D Program of Zhejiang Province (No.2007C33071).
文摘Many complex dynamical networks display synchronization phenomena. We introduce a general complex dynamical network model. The model is equivalent to a simple vector model of adopting the Kronecker product. Some synchronization criteria,including time-variant networks and time-varying networks,are deduced based on Lyapunov's stability theory,and they are proven on the condition of obtaining a certain synchronous solution of an isolated cell. In particular,the inner-coupling matrix directly determines the synchronization of the time-invariant network; while for a time-varying periodic dynamical network,the asymptotic stability of a synchronous solution is determined by a constant matrix which is related to the fundamental solution matrices of the linearization system. Finally,illustrative examples are given to validate the results.
文摘Human resource is already in society today one of the most important resources, the human resources stability has important implications, university should how to its important role and how to keep its stability, in this thesis are introduced. In addition, concerning human resources loss and its have also means have relevant instruction, how to understand university human resources of stability,handled the problem, the university can better, faster development.
文摘The risk assessment of contract conclusion is the primary and key part of equipment purchase contract risk management. In this paper, based on the fuzzy characteristics of contract risks, and overcoming the traditional disadvantages of analytic hierarchy process （AHP）, the fuzzy analytic hierarchy process （FAHP） of contract conclusion is proposed for meeting the actual need of equipment procurement contract risk assessment, and implementing the risk factors qualitative and quantitative assessments of different working nodes in contract conclusion. Thus, a scientific and reliable important basis is provided for the risk management of equipment procurement contract.
基金supported by the National Natural Science Foundation of China(No.11171161)the Scientific Research Foundation for the Returned Overseas Chinese Scholars of the State Education Ministry(No.2012940)
文摘Let （Ω＊ （M）, d） be the de Rham cochain complex for a smooth compact closed manifolds M of dimension n. For an odd-degree closed form H, there is a twisted de Rham cochain complex （Ω＊ （M）, d ＋ H∧） and its associated twisted de Rham cohomology H＊ （M, H）. The authors show that there exists a spectral sequence {Ep/r.q, dr } derived from the filtration Fp（Ω＊ （M）） = （¤i〉p Ωi（M） of Ω＊ （M）, which converges to the twisted de Rham cohomology H＊（M, H）. It is also shown that the differentials in the spectral sequence can be given in terms of cup products and specific elements of Massey products as well, which generalizes a result of Atiyah and Segal. Some results about the indeterminacy of differentials are also given in this paper.
基金Supported by the National Natural Science Foundation of China under Grant No.61304173Foundation of Liaoning Educational Committee(No.13-1069)and Hangzhou Polytechnic(No.KZYZ-2009-2)
文摘In this paper,we study lag synchronization between two coupled networks and apply two types of control schemes,including the open-plus-closed-loop(OPCL) and adaptive controls.We then design the corresponding control algorithms according to the OPCL and adaptive feedback schemes.With the designed controllers,we obtain two theorems on the lag synchronization based on Lyapunov stability theory and Barbalat's lemma.Finally we provide numerical examples to show the effectiveness of the obtained controllers and see that the adaptive control is stronger than the OPCL control when realizing the lag synchronization between two coupled networks with different coupling structures.
