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一种基于多Agent协同的准并行遗传算法 总被引:10,自引:1,他引:9
提出了一种基于多Agent协同操作的准并行遗传算法结构.该算法由若干运行简单遗传算法的计算单元组成,每个单元也就是独立的计算Agent.算法依照资源分配向量为各单元分配不同的计算资源,并根据个体迁移矩阵驱动它们进行个体交换.从多Agent系统的观点看,资源的分配体现了算法对各Agent的协调,个体的迁移则体现了Agent之间的协作.该算法很容易在串行计算机上实现,此时各个计算单元具有微观上串行、宏观上并行的准并行关系.对二维准并行算法动态性能的分析表明:由于统筹考虑了各计算单元间的协同关系,算法能够更充分有效地利用有限的计算资源,在解决不同的优化问题时表现出了很高的性能. 相似文献
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非绝热几何量子计算及拓扑量子门 总被引:1,自引:0,他引:1
精确求解了自旋-1/2粒子在旋转磁场下的Bloch方程和Schrodinger方程.用此问题的循环解,得到了Aharonov-Anandan(AA)几何相和动力学相的解析结果,并用正交态方法构造了具有和乐几何量子计算优点的非绝热几何量子门.基于一般的SU(2)循环演化条件,还构造了只依赖轨道的绕数和扭结数的普适拓扑量子门.最后建议用非对称的约瑟夫森结纳米电路实现所构造的各种量子门. 相似文献
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Kaixi Wang Shuo Wang Kwan San Hui Junfeng Li Chenyang Zha Duc Anh Dinh Zongping Shao Bo Yan Zikang Tang Kwun Nam Hui 《Advanced functional materials》2023,33(8):2211273
Platinum (Pt) remains the benchmark electrocatalyst for alkaline hydrogen evolution reaction (HER), but its industry-scale hydrogen production is severely hampered by the lack of well-designed durable Pt-based materials that can operate at ampere-level current densities. Herein, based on the original oxide layer and parallel convex structure on the surface of nickel foam (NF), a 3D quasi-parallel architecture consisting of dense Pt nanoparticles (NPs) immobilized oxygen vacancy-rich NiOx heterojunctions (Pt/NiOx-OV) as an alkaline HER catalyst is developed. A combined experimental and theoretical studies manifest that anchoring Pt NPs on NiOx-OV leads to electron-rich Pt species with altered density of states (DOS) distribution, which can efficiently optimize the d-band center and the adsorption of reaction intermediates as well as enhance the water dissociation ability. The as-prepared catalyst exhibits extraordinary HER performance with a low overpotential of 19.4 mV at 10 mA cm−2, a mass activity 16.3-fold higher than that of 20% Pt/C, and a long durability of more than 100 h at 1000 mA cm−2. Furthermore, the assembled alkaline electrolyzer combined with NiFe-layered double hydroxide requires extremely low voltage of 1.776 V to attain 1000 mA cm−2, and can operate stably for more than 400 h, which is rarely achieved. 相似文献
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