Adaptive dwell scheduling is essential to achieve full performance for a simultaneous multi-beam radar system.The dwell scheduling for such a radar system considering desired execution time criterion is studied in thi...Adaptive dwell scheduling is essential to achieve full performance for a simultaneous multi-beam radar system.The dwell scheduling for such a radar system considering desired execution time criterion is studied in this paper.The primary objective of this model is to achieve maximum scheduling gain and minimum scheduling cost while adhering to not only time,aperture,and frequency constraints,but also electromagnetic compatibility(EMC)constraint.The dwell scheduling algorithm is proposed to solve the above optimization problem,where several separation points are set on the timeline,so that each separator divides the scheduling interval into two sides.For the two sides,the dual-side time pointers are introduced,which move from the separator to both ends of the scheduling interval.The dwell tasks are analyzed in sequence at each analysis point based on their two-level synthetical priority.These tasks are then executed simultaneously by sharing the whole aperture under various constraints to accomplish multiple tasks concurrently.The above process is respectively conducted at each separator,and the final scheduling result is the one with the minimal cost among all.Simulation results prove that the proposed algorithm can achieve real-time dwell scheduling and outperform the existing algorithms in terms of scheduling performance.展开更多
With the development of renewable energy technologies,the recovery and utilization of low-grade energy based on hydroelectric effect have drawn much attention owing to its environmental friendliness.Herein,a novel hyd...With the development of renewable energy technologies,the recovery and utilization of low-grade energy based on hydroelectric effect have drawn much attention owing to its environmental friendliness.Herein,a novel hydroelectric generator utilizing sodium alginategraphene oxide(SA-GO)fibers is proposed,which is ecofriendly and low-cost.These fibers with a length of 5 cm and a diameter of 0.15 mm can generate an open circuit voltage(Voc)of approximately 0.25 V and a short circuit current(Isc)of 4µA.By connecting SA-GO fibers in either series or parallel,this combination can power some electronic devices.Furthermore,these fibers enable the recovery of low-grade energy from the atmosphere or around the human body.Both experimental and theoretical analysis confirm that the directional flow of protons driven by water molecules is the main mechanism for power generation of SA-GO fibers.This study not only presents a simple energy transformation method that is expected to be applied to our daily life,but also provides a novel idea for the design of humidity electricity-generation devices.展开更多
基金supported in part by the National Natural Science Foundation of China(Nos.61771095 and 62031007).
文摘Adaptive dwell scheduling is essential to achieve full performance for a simultaneous multi-beam radar system.The dwell scheduling for such a radar system considering desired execution time criterion is studied in this paper.The primary objective of this model is to achieve maximum scheduling gain and minimum scheduling cost while adhering to not only time,aperture,and frequency constraints,but also electromagnetic compatibility(EMC)constraint.The dwell scheduling algorithm is proposed to solve the above optimization problem,where several separation points are set on the timeline,so that each separator divides the scheduling interval into two sides.For the two sides,the dual-side time pointers are introduced,which move from the separator to both ends of the scheduling interval.The dwell tasks are analyzed in sequence at each analysis point based on their two-level synthetical priority.These tasks are then executed simultaneously by sharing the whole aperture under various constraints to accomplish multiple tasks concurrently.The above process is respectively conducted at each separator,and the final scheduling result is the one with the minimal cost among all.Simulation results prove that the proposed algorithm can achieve real-time dwell scheduling and outperform the existing algorithms in terms of scheduling performance.
基金supported by the Special Fund for Science and Technology Innovation of Jiangsu Province,China(No.BE2022022-3)the Ministry of Science and Technology of China(No.2023YFB4203704).
文摘With the development of renewable energy technologies,the recovery and utilization of low-grade energy based on hydroelectric effect have drawn much attention owing to its environmental friendliness.Herein,a novel hydroelectric generator utilizing sodium alginategraphene oxide(SA-GO)fibers is proposed,which is ecofriendly and low-cost.These fibers with a length of 5 cm and a diameter of 0.15 mm can generate an open circuit voltage(Voc)of approximately 0.25 V and a short circuit current(Isc)of 4µA.By connecting SA-GO fibers in either series or parallel,this combination can power some electronic devices.Furthermore,these fibers enable the recovery of low-grade energy from the atmosphere or around the human body.Both experimental and theoretical analysis confirm that the directional flow of protons driven by water molecules is the main mechanism for power generation of SA-GO fibers.This study not only presents a simple energy transformation method that is expected to be applied to our daily life,but also provides a novel idea for the design of humidity electricity-generation devices.
