本文应用灰色系统理论—灰色关联识别原理和方法，探讨干旱区土壤生态系统的主导因子识别。
The leading factors of soil ecosystem in arid area are discussed based an the application of the principle and method of grey relational gradation, the important part of grey system theory.
针对传统评价方法中量化指标丢失信息的情况，提出应用物元模型进行城市生态系统健康评价。
Aiming at the complexion in which the information lost in index ration, the matter element method was put forward to carry on urban ecosystem health evaluation.
方法应用透射电镜观察脑胶质瘤侵袭微生态系统中血瘤屏障的超微结构改变；
Methods The ultrastructure of blood tumor barrier in gliomas was observed by transmission electronic microscope.
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