Multi-beam satellite communication systems can improve the resource utilization and system capacity effectively.However,the inter-beam interference,especially for the satellite system with full frequency reuse,will de...Multi-beam satellite communication systems can improve the resource utilization and system capacity effectively.However,the inter-beam interference,especially for the satellite system with full frequency reuse,will degrade the system performance greatly due to the characteristics of multi-beam satellite antennas.In this article,the user scheduling and resource allocation of a multi-beam satellite system with full frequency reuse are jointly studied,in which all beams can use the full bandwidth.With the strong inter-beam interference,we aim to minimize the system latency experienced by the users during the process of data downloading.To solve this problem,deep reinforcement learning is used to schedule users and allocate bandwidth and power resources to mitigate the inter-beam interference.The simulation results are compared with other reference algorithms to verify the effectiveness of the proposed algorithm.展开更多
Flowers are endowed with rich symbolic meanings.It uses unique attributes to express people's emotions,feelings,and desires.According to Joan Snyder's Symphony VII,not all flowers symbolize beauty and happines...Flowers are endowed with rich symbolic meanings.It uses unique attributes to express people's emotions,feelings,and desires.According to Joan Snyder's Symphony VII,not all flowers symbolize beauty and happiness.The artist uses unique painting techniques to paint beautiful roses as bloody female organs,showing the fragility and helplessness of women.The work gives a contrasting impact of beauty and despair.Applying Greenberg's abstract expressionism theory and Erwin Panofsky's iconography theory along with research,this paper explored how Joan Snyder uses flower elements to symbolize women's vulnerability in Symphony VII.Joan Snyder's Symphony VII is constantly discussing violence against women around the world to warn and showcase the problems of women around us.展开更多
基金supported in part by the National Natural Science Foundation of China under Grant 62171052,Grant 61971054Science and Technology on Information Transmission and Dissemination in Communication Networks Laboratory Foundation under Grant HHX21641X002。
文摘Multi-beam satellite communication systems can improve the resource utilization and system capacity effectively.However,the inter-beam interference,especially for the satellite system with full frequency reuse,will degrade the system performance greatly due to the characteristics of multi-beam satellite antennas.In this article,the user scheduling and resource allocation of a multi-beam satellite system with full frequency reuse are jointly studied,in which all beams can use the full bandwidth.With the strong inter-beam interference,we aim to minimize the system latency experienced by the users during the process of data downloading.To solve this problem,deep reinforcement learning is used to schedule users and allocate bandwidth and power resources to mitigate the inter-beam interference.The simulation results are compared with other reference algorithms to verify the effectiveness of the proposed algorithm.
文摘Flowers are endowed with rich symbolic meanings.It uses unique attributes to express people's emotions,feelings,and desires.According to Joan Snyder's Symphony VII,not all flowers symbolize beauty and happiness.The artist uses unique painting techniques to paint beautiful roses as bloody female organs,showing the fragility and helplessness of women.The work gives a contrasting impact of beauty and despair.Applying Greenberg's abstract expressionism theory and Erwin Panofsky's iconography theory along with research,this paper explored how Joan Snyder uses flower elements to symbolize women's vulnerability in Symphony VII.Joan Snyder's Symphony VII is constantly discussing violence against women around the world to warn and showcase the problems of women around us.
