几何边界条件

On the basis of analyzing the characteristics of geological plane maps, the notion of the wire frame model illustrated by outline of geological blocks is proposed to describe the geometrical form of complex faults and the relationships among them.

在分析平面地质图数据特点的基础上，为准确表达复杂断层的空间几何形态和相互之间的关系，引入了由地质形体的轮廓线构建而成的线框架模型概念；修正了边界表示法模型有效构建的基本条件；从地层与断层之间的关系角度详细阐述了有效构建线框架模型的方法；提出了以线框架模型为基础的断层面整体构建技术思路，解决了复杂断层面三维构建问题。

Taking boundary reflection, natural degradation and background value into consideration, methods for calculating characteristic parameters of pollutant zone with outfalls randomly placed were presented, and formulas under simplified conditions were proposed.

全面探讨连续点源河流污染带的几何特徵，在考虑了两岸边界的一次反射、污染物的降解和背景值共同影响的条件下，给出排污口在任意位置的污染带特徵参数的计算方法，在简化情况下给出了直接计算公式。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。