Efficient control of the desulphurization system is challenging in maximizing the economic objective while reducing the SO_(2) emission concentration. The conventional optimization method is generally based on a hiera...Efficient control of the desulphurization system is challenging in maximizing the economic objective while reducing the SO_(2) emission concentration. The conventional optimization method is generally based on a hierarchical structure in which the upper optimization layer calculates the steady-state results and the lower control layer is responsible to drive the process to the target point. However, the conventional hierarchical structure does not take the economic performance of the dynamic tracking process into account. To this end, multi-objective economic model predictive control(MOEMPC) is introduced in this paper, which unifies the optimization and control layers in a single stage. The objective functions are formulated in terms of a dynamic horizon and to balance the stability and economic performance. In the MOEMPC scheme, economic performance and SO_(2) emission performance are guaranteed by tracking a set of utopia points during dynamic transitions. The terminal penalty function and stabilizing constraint conditions are designed to ensure the stability of the system. Finally, an optimized control method for the stable operation of the complex desulfurization system has been established. Simulation results demonstrate that MOEMPC is superior over another control strategy in terms of economic performance and emission reduction, especially when the desulphurization system suffers from frequent flue gas disturbances.展开更多
Peasant painting is a kind of painting created by farmers as creative subject,bearing rich significance.According to the historical development of peasant painting in reality,the types of meaning it carried could be d...Peasant painting is a kind of painting created by farmers as creative subject,bearing rich significance.According to the historical development of peasant painting in reality,the types of meaning it carried could be divided into three types in chronological order:political ideological significance,folk life significance,and creative fashion significance.These three types of meaning gave rise to three types of aesthetic utopia,namely political aesthetic utopia,folk aesthetic utopia and fashion aesthetic utopia.The three types of aesthetic utopia reflected three forms of negation and revolution of daily life.What the political aesthetic utopia resisted was the alienation force of material desire.What folk aesthetic utopia resisted was the desire for material and the binding of political ideology.The fashion aesthetic utopia opposed the relatively narrow localism.Through these three forms of resistance,the public also constructed three identities:the interpreter of their own aesthetic interpretation of political ideology,the interpreter of their own aesthetic interpretation of real life from perspective of local feelings,and the interpreter of their own aesthetic interpretation of real life from perspective of the relationship between themselves and the world.展开更多
针对多个物理层传输芯片(PHY)、单ATM层的应用情况,分析了Utop ia level 2接口时序,基于现场可编程门阵列(FPGA)设计并实现了轮询机制的Utop ia接口逻辑,给出了时序仿真结果。设计了一种ATM同高层协议的接口逻辑并给出了进一步减小轮询...针对多个物理层传输芯片(PHY)、单ATM层的应用情况,分析了Utop ia level 2接口时序,基于现场可编程门阵列(FPGA)设计并实现了轮询机制的Utop ia接口逻辑,给出了时序仿真结果。设计了一种ATM同高层协议的接口逻辑并给出了进一步减小轮询操作开销的方法。同传统单端口模式相比,节约了75%的逻辑资源和引脚。测试结果表明,4个物理层单元能以155 Mbps的速度双向并行通信,可为模块化设计提供参考。展开更多
Chinese new generation science fiction refers to the science fiction after the 1990s because of their diverse creative concepts,aesthetic values and new narrative modes.This paper summarizes the development of Chinese...Chinese new generation science fiction refers to the science fiction after the 1990s because of their diverse creative concepts,aesthetic values and new narrative modes.This paper summarizes the development of Chinese science fiction literature,and analyzes the utopias in Chinese new generation science fiction.The types of utopias in new generation science fiction can be divided into two aspects:temporal and spatial utopias and technological utopias.The characteristics of Chinese new generation's utopia include extraordinary Imagination,new and different ways of thinking.The functions of Chinese utopia are mainly reflected in the affirmation of ultimate values and the criticism of reality.The creation of new generations has brought new hope to Chinese science fiction literature,but in general,Chinese science fiction literature has a long way to go.展开更多
Adaptive fuzzy neural inference systems are used to illustrate the primary nodal number of plant life-forms. Categorization of two candidate areas is carried out using the water-energy dynamic (for Ecuador, South Amer...Adaptive fuzzy neural inference systems are used to illustrate the primary nodal number of plant life-forms. Categorization of two candidate areas is carried out using the water-energy dynamic (for Ecuador, South America) and Macedonia, Southern Europe), within which the life-form spectra are distributed. Genetic optimization methods are used to expand the primary nodal number to the complete number of life-form categories. The distribution of the elements exhibits a stochastic, binomial distribution and the utopia line and curve are summarized which enhance accuracy of the climatic data and of the consequent numbers of plant species occurrences. Expansion of the distribution of each life-form category is approximated within the Z utopia hyperplane with use of the functional approximation algorithm. This process gives additional structure and informative value to the Z plane, enhancing our ability to make informed policy decisions concerning species and ecosystem conservation.展开更多
基金supported by the National Key Research and Development Program of China (2017YFB0601805)。
文摘Efficient control of the desulphurization system is challenging in maximizing the economic objective while reducing the SO_(2) emission concentration. The conventional optimization method is generally based on a hierarchical structure in which the upper optimization layer calculates the steady-state results and the lower control layer is responsible to drive the process to the target point. However, the conventional hierarchical structure does not take the economic performance of the dynamic tracking process into account. To this end, multi-objective economic model predictive control(MOEMPC) is introduced in this paper, which unifies the optimization and control layers in a single stage. The objective functions are formulated in terms of a dynamic horizon and to balance the stability and economic performance. In the MOEMPC scheme, economic performance and SO_(2) emission performance are guaranteed by tracking a set of utopia points during dynamic transitions. The terminal penalty function and stabilizing constraint conditions are designed to ensure the stability of the system. Finally, an optimized control method for the stable operation of the complex desulfurization system has been established. Simulation results demonstrate that MOEMPC is superior over another control strategy in terms of economic performance and emission reduction, especially when the desulphurization system suffers from frequent flue gas disturbances.
文摘Peasant painting is a kind of painting created by farmers as creative subject,bearing rich significance.According to the historical development of peasant painting in reality,the types of meaning it carried could be divided into three types in chronological order:political ideological significance,folk life significance,and creative fashion significance.These three types of meaning gave rise to three types of aesthetic utopia,namely political aesthetic utopia,folk aesthetic utopia and fashion aesthetic utopia.The three types of aesthetic utopia reflected three forms of negation and revolution of daily life.What the political aesthetic utopia resisted was the alienation force of material desire.What folk aesthetic utopia resisted was the desire for material and the binding of political ideology.The fashion aesthetic utopia opposed the relatively narrow localism.Through these three forms of resistance,the public also constructed three identities:the interpreter of their own aesthetic interpretation of political ideology,the interpreter of their own aesthetic interpretation of real life from perspective of local feelings,and the interpreter of their own aesthetic interpretation of real life from perspective of the relationship between themselves and the world.
基金supported by 2022 Project of Women Federation of Zhejiang Province(No.:202248).
文摘Chinese new generation science fiction refers to the science fiction after the 1990s because of their diverse creative concepts,aesthetic values and new narrative modes.This paper summarizes the development of Chinese science fiction literature,and analyzes the utopias in Chinese new generation science fiction.The types of utopias in new generation science fiction can be divided into two aspects:temporal and spatial utopias and technological utopias.The characteristics of Chinese new generation's utopia include extraordinary Imagination,new and different ways of thinking.The functions of Chinese utopia are mainly reflected in the affirmation of ultimate values and the criticism of reality.The creation of new generations has brought new hope to Chinese science fiction literature,but in general,Chinese science fiction literature has a long way to go.
文摘Adaptive fuzzy neural inference systems are used to illustrate the primary nodal number of plant life-forms. Categorization of two candidate areas is carried out using the water-energy dynamic (for Ecuador, South America) and Macedonia, Southern Europe), within which the life-form spectra are distributed. Genetic optimization methods are used to expand the primary nodal number to the complete number of life-form categories. The distribution of the elements exhibits a stochastic, binomial distribution and the utopia line and curve are summarized which enhance accuracy of the climatic data and of the consequent numbers of plant species occurrences. Expansion of the distribution of each life-form category is approximated within the Z utopia hyperplane with use of the functional approximation algorithm. This process gives additional structure and informative value to the Z plane, enhancing our ability to make informed policy decisions concerning species and ecosystem conservation.
