This paper presents a method of recording standard 12 leads synchronous ECG making full use of resources of single-chip-microcomputer's hardware and software. In briefly, its principle of design.
本文介绍了一种充分利用单片机软硬件资源实现同步标准十二导心电图采集记录的方法，简述其设计原理。
Always use fully synchronous design. You never need to reply on gate delay if your design is fully synchronous.
始终使用完全同步设计。如果设计是全同步的，则无需回应门延迟。
The principle and property of synchronous focusing of a twin-laser in same light path and its realization technique are described. The design result is evaluated by use of a practical example.
叙述同一光路中双激光获得共焦的原理和特点及其实现技术，并就一实例的设计结果进行评价。
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