A dynamic tree model based on timed L-system for GIS is presented.

基于时变l系统提出了一种面向GIS的动态树木模型。

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This L-system has many features: brief definition, high efficiency, rationality and definite randomicity.

该L-系统定义简洁、高效、合理，并具备有限的随机性。

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With L-system method, we can obtain all kinds of different patterns by revising the correlation parameter.

利用分形理论中的L -系统法，适当修改相关参数就能得到各种不同的图案。

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There have been a few anecdotal concerns raised over the last several weeks that LightSquared's proposed LTE network -- which would repurpose L-band spectrum formerly used for satellite -- is too close to the spectrum used by the Global Positioning System, leading to unintentional jamming when the towers overpower the much weaker GPS signals.

ENGADGET: US Air Force raises concerns over LightSquared's LTE network messing with GPS

The system was developed in conjunction with defense contractor L-3 Communications Corp who foresees producing hundreds or thousands of the devices for both government agencies and private companies, but probably not for individual use -- if you know how much 125 pounds of neodymium magnets cost, you'll know why.

ENGADGET: Military-grade "Guard Dog" hard drive degausser

After extensive technical delays and bureaucratic bickering, Siemens (nyse: SI - news - people ) recently installed a computerized system for the L train that allows the line to operate 33 trains per hour, up from 28.

FORBES: Traffic Busters