uvi

Based on the weather and UVI in bathing season , the beaches could be divided into cloudy and rainy , cloudy and rainless , and sunny and rainless groups .

根据天气及紫外线指数状况可以分为多云多雨型、多云少雨型和少云少雨型。

A portable and low cost solar UV index ( UVI ) meter is designed and fabricated .

设计并制作了一种便携式、低成本的日光紫外线指数检测仪。

The forecasting accuracy of Ultraviolet Radiation Index ( UVI ) depends on the calculating exactness of UV radiation intensity .

地表紫外辐射强度计算的准确与否，直接关系到紫外辐射指数（UVI）预报的准确性，其计算方法受到气象部门的特别重视。

Ultraviolet Index ( UVI ) was measured at Beijing Observatory between May 1999 and October 2001.The results show that the UVI varies significantly in different seasons .

1999年5月&2001年10月在北京观象台对紫外线指数（UVI）进行了长期观测，结果表明：UVI季节差异明显，春、夏、秋、冬季的最大值分别为785987492299；

The UVI reaches its peak between 10:00 and 15:00 in every day . And during the period of time , the UVI is generally in the range of 0 ~ 2 in autumn and winter , which has less harm to human health .

在UVI高峰时段（10：00&15：00），秋、冬季的UVI基本在0～2范围，对人体危害不大；