共查询到17条相似文献,搜索用时 62 毫秒
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一类新型无线电罗盘定向系统 总被引:1,自引:0,他引:1
介绍了一种新的无线电罗盘系统实现方案。通过对系统原理的数学分析,论证了其理论精度,并讨论了在工程上的可实现性。分析结果表明:该系统实现的条件要求不高,在电路上易于实现。在0~360o范围内,其理论定向角度误差可以保证<0.69o,在电路参数选取合适时,理论最小误差可达0.17o。 相似文献
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近几年,业余业务和卫星业余业务(通常我们所说的业余无线电)在我国发展非常迅速.设台数量与日俱增。随着各种无线电技术、电子技术的不断发展,业余无线电的活动内容和方式也在不断地快速变化着。 相似文献
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作为一名无线电爱好者,一名HAM,2009年您的活动计划好了吗?相信在2009年无线电能成为您最好的生活伴侣,让您畅游在无线电的海洋中,享受无线电带来的通联乐趣。在此我们特请BG8SF为大家介绍一下有无线电意义的活动,希望能让大家更好地在2009年享受业余无线电带来的乐趣。 相似文献
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由于电子技术的飞速发展.各类电子电器设备越来越多地用于各行各业、千家万户。而大多数电工设备都有可能干扰无线电通信。因此.无线电业务不仅会受到各类无线电设备的干扰.还常会受到各种电子电工产品和工科医设备的有害干扰。怎样预防和排除无线电干扰、保护所有合法的无线电业务是 相似文献
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本文分析了“数字电子技术”课程教学中出现的不能从知识建构规律上说明教学内容的问题,提出一种基于框架理论的教学方法,分析了其理论基础,说明了其在实践中的注意要点,并给出了教学过程的基本步骤。教学实践表明,这种教学方法具有一定的优越性,还可以推广到其他课程的教学中去。 相似文献
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A new Graphics Processing Unit (GPU) parallelization strategy is proposed to accelerate sparse finite element computation for three dimensional electromagnetic analysis.The parallelization strategy is ... 相似文献
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利用图形处理单元(GPU)加速混合场积分方程(CFIE)分析导体目标电磁散射问题。较电场积分方程(EFIE)和磁场积分方程(MFIE),CFIE消除了内谐振问题,并且具有更好的条件数。求解的数值方法为基于 RWG基函数的矩量法(MoM)。所有计算步骤均在 GPU上实现,包括:阻抗元素填充、电压向量填充、矩阵方程的共轭梯度(CG)求解、雷达散射截面(RCS)计算。在保证数值精确度的前提下获得了数十倍的速度提升。 相似文献
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This paper proposes new models of GPU energy consumption from the perspectives of hardware architects and graphics programmers by performing an architecture-independent analysis of the classical graphics rendering pipeline which is still in widespread use today. The detailed analysis includes graphics rendering workload, memory bandwidth and energy consumption . Although the models are derived from classical 3D pipeline, they are extensible to programmable pipelines. There are many factors that affect the performance and energy consumption of 3D graphics rendering, such as the number of textures, vertex sharing, level of details, and rendering algorithms. The proposed models are validated by our simulation study and used to guide our 3D graphics hardware design and 3D graphics programming in order to optimize performance and energy consumption of our GPU prototypes which have been successfully fabricated in SMIC 0.13 μm CMOS technology. 相似文献
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Higher-order Time Domain Finite Element Method (TDFEM) based on the nodal inter- polation is proposed for two-dimensional electromagnetic analysis. The detailed algorithms of the method are presented firstly, and then the accuracy, CPU time and memory consumption of the higher-order node-based TDFEM are investigated. The high performance of the presented approach is validated by numerical results of the transient responses of Transverse Electric (TE) field and Transverse Magnetic (TM) field in a rectangular... 相似文献
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Integral method is employed in this paper to alleviate the error accumulation of differential equation discretization about time variant t in Time Domain Finite Element Method (TDFEM) for electromagnetic simulation. The error growth and the stability condition of the presented method and classical central difference scheme are analyzed. The electromagnetic responses of 2D lossless cavities are investigated with TDFEM; high accuracy is validated with numerical results presented. 相似文献
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UHV输电线路中绝缘子串电位分布的仿真计算 总被引:1,自引:0,他引:1
利用三维电磁场分析软件Ansoft对铁塔、导线、绝缘子按实际尺寸建立三维模型。综合考虑了芯棒、伞群、球头球窝、导线、连接金具、铁塔、均压环等因素对1000kV特高压输电线路中的绝缘子表面电场分布进行了计算。分析了导线、连接金具、均压环、铁塔、三相中其余两相对Ⅰ型绝缘子串和Ⅴ型绝缘子串电场分布的影响。计算结果可以为绝缘子的正确使用和优化设计提供参考。分析可知,使用均压环可使绝缘子上的电位分布有较大地改善。 相似文献
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An advanced strategy for modelling the thermal stress induced in aluminium interconnections during processing of multilevel structures is presented. The advantage of the approach described is that it allows the residual stresses from one processing step to be used as the initial conditions for a subsequent step. 2D elasto-plastic model (von Mises plastic criterion) is implemented in Finite Element Code and it is shown that even after significant relaxation by plastic deformation, high thermal stress resides in the aluminium line in both width and thickness directions. The technique demonstrated here is for a silicon-glass–aluminium-glass structure. However, it is readily extended to more complex situations and material combinations. 相似文献