reference distance

The magnification factor for magnifiers and telescopes depends on the reference distance.

放大镜和望远镜的放大倍数也都是依照这个标准距离来确定的.

By investigating the situation of distance education in South Africa and Egypt, some advanced experiences and ways may be accepted and borrowed for our reference in constructing Jiangsu's distance open university.

通过对南非、埃及有关学校开展远程教育的情况考察，学习借鉴先进的做法，为建设江苏远程开放大学服务。

Finally, it is put forward that the real time attribute of the algorithm can be improved by changing the reference point of the distance measure in k-dimensions space, that is to say changing the value of the referential sequence.

然后通过改变维空间中距离测度的参考点来提高算法的实时性；

This paper gives effection distance and identify probability using Johnson criterion and FLIR models in order to provide reference for system performance evaluation and forecast.

文中用Johnson判别准则和FLIR模型计算CCD成像系统对目标的识别概率和作用距离，为系统性能评估和预测提供一定的参考。

As base stations can be apart from a long distance, and may include mobile stations, every base station must use its own reference source.

由于高频多基雷达系统各基站的距离较远，且可能包含舰载移动站，所以各基站必须使用独立的基准源。