Its theory support is matter-element and extension set, and its logical cell is matter-element.

它的理论支柱是物元理论和可拓集合理论，其逻辑细胞则是物元。

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This part mainly includes the choice of signal source, antenna, network framework, and the allocation of logical cell, implements the effective network coverage of the underground tunnel.

该部分主要涉及信源、天线、组网方案的选择，以及逻辑小区的划分，实现对地下隧道的有效覆盖。

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Many airlines already sell in-flight Wi-Fi connections for laptop computers and tablets, so the logical next step would be to allow airborne passengers to use their cell phones to connect to the world below.

CNN: Cell phones on planes? For texting, not gabbing

Meanwhile, Reuters interviewed Kiyoshi Kanamura, a professor at Tokyo Metropolitan University, who said that the logical solution for Boeing would be to install ceramic plates between each cell and add a vent to the battery box.

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All three combine to represent the logical future of personal computing: surfing, shopping and downloading the Net from your car, cell phone and TV set, and from portable Internet appliances.

FORBES: Another Bite Of The Apple