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In this paper,a dielectric loaded grating for Smith-Purcell(SP)device is proposed.The results obtained from two-dimensional particle-in-cell(PIC)simulation
科技的发展致使高性能材料的需求量增加,纳米材料作为新材料的重要组成部分也呈现出供不应求的趋势。目前制备纳米材料的方法主要有沉淀法、溶胶凝胶法、微乳液法、气相法等,
Particle swarm optimization(PSO)is used to searching the start oscillation conditions of gyrotron backward wave oscillator(gyro-BWO),the results are more ac
Behaviour is a variable trait of an individual that can vary with its age or the season.Animal personality is an intrinsic,individual characteristic and aff
At the same microwave excitation,double-piece-window has bigger critical dissipation power capacity than the single-piece-window.TE11 model electromagnetic
In this paper,the beam-wave interaction of a 170 GHz megawatt-level corrugated coaxial-gyrotron operating at TE31,12 mode was studied numerically.Based on t
碳膜分离技术作为分离过程的一种重要方法,在气体分离上的研究取得了突破性进展。分子筛碳膜的气体分离能力远大于聚合物膜,在耐高温、耐有机溶剂及蒸汽、耐酸碱等性能上均优于聚合物膜,因此与之相关的研究具有广阔的应用前景。本文以聚酰亚胺为原料,在600℃下利用高温裂解方法制备碳膜。通过对一系列小分子气体(如:H2,CH4,CO2,N2)的渗透率测试,并计算碳膜对各气体的理想分离系数。同时考察了碳膜制备过程中
The output power of the working and backward wave oscillation modes in a TE11first harmonic Gyro-TWT with misaligned electron beam is calculated.The backwar