Based on the single-formula of the L-systems, we proposed the theory of the pseudo L-systems which is the multi-formula.

以分形L-系统的单规则作图机制为基础，提出了伪L-系统的多规则产生式机制。

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Three types of model templet, which are created depending on characteristic of branching structure, are used as the module of L-systems.

根据分枝结构的外形特征，把分叉结构归纳为三种模板模型。

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According to the geometric character of the plant root systems, application of the L-systems theories in simulating the plant root systems growth was studied.

根据植物根系生长的几何特征，探讨了L系统理论在植物根系生长模拟中的具体应用。

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At least two other teams previously have said they have plans to develop electric-powered taxi technologies, including systems under development at L-3 Communications Holdings Inc.

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L-3 Communications Holdings Inc. and OSI Systems Inc.

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He became president of SY Technology, now the SY Coleman division of L-3 Communications, a leading contractor for missile-defense systems.

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