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Quickpcb
- 电子产品的轻薄小巧化发展，致使电路板的布局也越趋紧凑，3mil的线宽与线距及高频板应用已非常普遍。 面对日益精密的电路板，传统的菲林尺等抄板手段已不能保证其精度与效率。 下面为大家介绍一种最方便最高效精准的抄板方法，只需要你稍有PROTEL电路基础就能轻易掌握。-Slim development of electronic products, resulting in circuit board layout is also becoming more compact, 3mil l
On-the-residentiall
- 我国目前对噪音污染的治理方法主要有两种：一种是将水泥路 面的改柏油路面第二种是在距离住宅窗户较近的道路两侧安装隔音 屏障。但效果均不理想。路面改变只可降低汽车行驶摩擦声的3～5 分贝左右。至于安装隔音屏障．由于声波的衍射特性，声音的传播可 以跨越隔音屏障，在中频，高频声波传播中，遇到难以穿透的障碍物 时，背面就有一个声波微弱的影区。所以此举只对相近楼层有所缓 解，对更高楼层的住户而言，效果并不明显-Our current treatment methods for noi
AN2974
- 步进电机细分驱动，快速衰减模式实现降低高频噪音-Stepping Motor Driver, fast decay modes reduce high-frequency noise
studies-on-radar-cross-section
- 概述军用飞行目标对微波雷达的散色特性，讨论目标的高频散色机理，RCS分析方法及减缩途径，以及低RCS目标探测技术-Overview military flying targets scattered on color characteristics of microwave radar, discuss the target color high-frequency dispersion mechanism, RCS analysis and reduction pathways, and lo
Power-Transformer-FRA
- 变压器绕组变形检测的在高频测试的可能性研究，有实验有仿真-FRA tests in the frequency range up to 10 MHz were investigated using simulations and measurements. It was found that the FRA test was more sensitive to changes in the transformer at frequencies above 1 to 3 MHz tha