直角坐标

This research focuses on evaluating the accuracies of trilateration and offset methods. In this research, two accident scenes are setup: one is on the flat road, and another one is on the hill.

除此之外，本研究在直角坐标法中，增加距离的观测量，配合三角几何条件，藉此弥补基准线与基准线外之测量点的连线不成直角的情形。

Without measuring the relative angles between objects, the validity of traffic accident on-site sketch is often challenged. In Taiwan, two common measuring methods for drawing a traffic accident on-site sketch: one is trilateration method, and another one is offset method. Both methods have their limits.

现行，常用於绘制交通事故现场图的量测方法有二：一为三定点法，此法常因测线间夹角过大或过小时，使得当测线彼此间的夹角有微小误差时，即造成颇大的位置偏移误差；另一方法为直角坐标法，此法应用在交通事故现场绘制的测量，假设目测标定於基准线与基准线外之测量点的连线成直角，若不为直角时，易造成绘制结果的偏差。

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。