In the paper,we study an optimal control for a system representing a competitive species model with fertility and mortality depending on a weighted size in a polluted environment.A fixed point theorem is applied to ob...In the paper,we study an optimal control for a system representing a competitive species model with fertility and mortality depending on a weighted size in a polluted environment.A fixed point theorem is applied to obtain the existence and uniqueness exhibited by a non-negative solution of above mentioned model.A maximum principle helps to carefully verify the existence of the optimal control policy,and tangent-normal cone techniques help to obtain the optimal condition specific to control issue.展开更多
Man made activities are changing environment of our planet earth.Various methods are used to reduce the environmental pollution.In this paper the methods of air/water/soil pollution mitigation/reduction using electrom...Man made activities are changing environment of our planet earth.Various methods are used to reduce the environmental pollution.In this paper the methods of air/water/soil pollution mitigation/reduction using electromagnetic fields is discussed.Air/water/soil contains ions and the energy transfer for living organisms takes place by ion exchange processes.Ions are affected by electric/magnetic fields.Many investigators展开更多
Various methods are used to reduce the environmental pollution.In this paper the methods of air/water/soil pollution mitigation/reduction using electromagnetic fields is discussed.Air/water/soil contains ions and the ...Various methods are used to reduce the environmental pollution.In this paper the methods of air/water/soil pollution mitigation/reduction using electromagnetic fields is discussed.Air/water/soil contains ions and the energy transfer for living organisms take place by ion exchange processes.Ions are affected by electric/magnetic fields.Many investigators are working on improving environment by applying electromagnetic fields,which affect展开更多
Attaching more importance to the problem of animal excrement pollution is the premise of realizing the sustainable development of animal husbandry in Heilongjiang Province. With the constant expansion of the scale of ...Attaching more importance to the problem of animal excrement pollution is the premise of realizing the sustainable development of animal husbandry in Heilongjiang Province. With the constant expansion of the scale of breeding industry, the amount of animal excrement will increase greatly, corresponding to the increasing pressure on water and land. Therefore, for the sake of promoting the coordinated development of animal husbandry and the environment, this paper analyzed the status of animal excrement pollution in Heilongjiang Province. On this base, the paper suggested that we must control animal excrement pollution proceeding from reality by using administrative means, legal means, economic means and technical means.展开更多
基金Supported by the Natural Science Foundation of Ningxia(2023AAC03114)National Natural Science Foundation of China(72464026).
文摘In the paper,we study an optimal control for a system representing a competitive species model with fertility and mortality depending on a weighted size in a polluted environment.A fixed point theorem is applied to obtain the existence and uniqueness exhibited by a non-negative solution of above mentioned model.A maximum principle helps to carefully verify the existence of the optimal control policy,and tangent-normal cone techniques help to obtain the optimal condition specific to control issue.
文摘Man made activities are changing environment of our planet earth.Various methods are used to reduce the environmental pollution.In this paper the methods of air/water/soil pollution mitigation/reduction using electromagnetic fields is discussed.Air/water/soil contains ions and the energy transfer for living organisms takes place by ion exchange processes.Ions are affected by electric/magnetic fields.Many investigators
文摘Various methods are used to reduce the environmental pollution.In this paper the methods of air/water/soil pollution mitigation/reduction using electromagnetic fields is discussed.Air/water/soil contains ions and the energy transfer for living organisms take place by ion exchange processes.Ions are affected by electric/magnetic fields.Many investigators are working on improving environment by applying electromagnetic fields,which affect
基金Graduate Innovative Research Project of Heilongjiang Province (YJSCX2007-0069HLJ)Community Research Project of National Research Institutes (2005DIA3J032)Science and Technology Research Project of Harbin (2007AA9CT121)
文摘Attaching more importance to the problem of animal excrement pollution is the premise of realizing the sustainable development of animal husbandry in Heilongjiang Province. With the constant expansion of the scale of breeding industry, the amount of animal excrement will increase greatly, corresponding to the increasing pressure on water and land. Therefore, for the sake of promoting the coordinated development of animal husbandry and the environment, this paper analyzed the status of animal excrement pollution in Heilongjiang Province. On this base, the paper suggested that we must control animal excrement pollution proceeding from reality by using administrative means, legal means, economic means and technical means.
