The principle of the design of a new kind of combined polygon scanner for bar code is proposed.

本文提出了一种新型组合转镜式多方位扫描条码识别器光学设计原理及其光路，扫描轨迹以及必要的公式。

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The design of motion control board based on DSP and FPGA was introduced, the principle of the design was analyzed.

介绍了一种基于DSP和FPGA的运动控制板的设计方法，分析了其原理，具有很好的参考价值。

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The principle of the design method based on ampere-conductor-unit is described, then the method is given and also illustrated by 8/2 pole changing.

首先叙述“安导元”整距变极的原理，然后给出了设计方法，并以8/2变极为例说明之。

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The study argued that managing biodiversity needs to be enshrined in the design stages of projects, especially if the principle of a 'net gain' in biodiversity is to be achieved.

BBC: Jobs or birds: Turning Rio rhetoric into reality

My last conversation with Adrian Bejan ended on the notion that if design in nature is a universal principle of the material world, then freedom is the key variable that determines how efficiently designs can evolve over time.

FORBES: The Constructal Sessions, Part II: Freedom and Design

He was thanking Vint Cerf for making state-full edges a core design principle of the original web.

FORBES: The Link Between Scarce IP Addresses and the Centralization of the Internet