Point, line and area are basic elements in GIS vector spatial data.
在矢量GIS空间数据中，点、线和面目标是它的基本要素。
We find that there is an essential difference between mutually-trapping beams and the rigorous vector spatial soliton.
结果发现“互陷”传输的光束与严格意义的矢量空间孤子之间存在本质的不同。
The steady state vector spatial solitons in photorefractive crystals and the modulation instability in biased photorefractive-photovoltaic crystals are studied by both analytic and numerical methods.
用解析方法和数值方法在理论上研究了光折变晶体中的稳态矢量空间光孤子及有偏压光伏光折变晶体中光束的调制不稳定性；
The steady state vector spatial solitons in photorefractive crystals and the modulation instability in biased photorefractive-photovoltaic crystals are studied by both analytic and numerical methods.
用解析方法和数值方法在理论上研究了光折变晶体中的稳态矢量空间光孤子及有偏压光伏光折变晶体中光束的调制不稳定性；
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