With the rapid development of satellite technology, mega satellite constellations have become a research hotspot. A large number of related techniques have been developed on orbit topology, network routing, energy bal...With the rapid development of satellite technology, mega satellite constellations have become a research hotspot. A large number of related techniques have been developed on orbit topology, network routing, energy balance and resource control. However, it is difficult to accurately compare the performance of similar studies due to differences in the means of validation. Especially for invulnerability studies in many military applications, a unified evaluation system is essential. This paper proposes a network evaluation system for mega satellite constellations. Evaluation parameters include orbit topology, communication network, energy balance and invulnerability. Different application algorithms and traffic models were used to validate the specific system. .展开更多
Based on the research on the basic status quo of the construction of public employment and entrepreneurship service system in Daqing, this paper analyzes the problems existing in Daqing’s establishment of a national ...Based on the research on the basic status quo of the construction of public employment and entrepreneurship service system in Daqing, this paper analyzes the problems existing in Daqing’s establishment of a national public employment and entrepreneurship service demonstration city, and gives countermeasures and suggestions from three levels: optimizing the public employment and entrepreneurship service system, innovating the public employment and entrepreneurship service mode, and improving the entrepreneurship driven employment support system.展开更多
由于三容水箱是一个具有多变量、非线性和耦合特征的系统,难以建立精确的数学模型。为此,提出了基于RBF-ARX模型的预测控制策略。RBF-ARX模型是神经网络RBF(Radial Basis Function)和线性自回归ARX(Auto-Regres-sive e Xogenous)模型兼...由于三容水箱是一个具有多变量、非线性和耦合特征的系统,难以建立精确的数学模型。为此,提出了基于RBF-ARX模型的预测控制策略。RBF-ARX模型是神经网络RBF(Radial Basis Function)和线性自回归ARX(Auto-Regres-sive e Xogenous)模型兼容组合的模型,适用于非线性系统的建模。预测控制算法基于此模型预测对象输出变化,并通过闭环控制,使误差最小。该设计首先构建三容水箱系统的RBF-ARX模型,并辨识、优化模型参数。基于此模型设计了系统预测控制器,最后通过实时控制证实了该方法的可行性和有效性。展开更多
文摘With the rapid development of satellite technology, mega satellite constellations have become a research hotspot. A large number of related techniques have been developed on orbit topology, network routing, energy balance and resource control. However, it is difficult to accurately compare the performance of similar studies due to differences in the means of validation. Especially for invulnerability studies in many military applications, a unified evaluation system is essential. This paper proposes a network evaluation system for mega satellite constellations. Evaluation parameters include orbit topology, communication network, energy balance and invulnerability. Different application algorithms and traffic models were used to validate the specific system. .
文摘Based on the research on the basic status quo of the construction of public employment and entrepreneurship service system in Daqing, this paper analyzes the problems existing in Daqing’s establishment of a national public employment and entrepreneurship service demonstration city, and gives countermeasures and suggestions from three levels: optimizing the public employment and entrepreneurship service system, innovating the public employment and entrepreneurship service mode, and improving the entrepreneurship driven employment support system.
文摘由于三容水箱是一个具有多变量、非线性和耦合特征的系统,难以建立精确的数学模型。为此,提出了基于RBF-ARX模型的预测控制策略。RBF-ARX模型是神经网络RBF(Radial Basis Function)和线性自回归ARX(Auto-Regres-sive e Xogenous)模型兼容组合的模型,适用于非线性系统的建模。预测控制算法基于此模型预测对象输出变化,并通过闭环控制,使误差最小。该设计首先构建三容水箱系统的RBF-ARX模型,并辨识、优化模型参数。基于此模型设计了系统预测控制器,最后通过实时控制证实了该方法的可行性和有效性。
