读编往来

拜读了《用高清记录生活》之后,觉得这篇文章写得不错!详实地介绍了家用高清数码摄像机的格式、特点,略略提了一下子高清数码相机的现状．最后还提及到高清内容的源头。     

WCDMA系统的QoS研究

Qo S是 WCDMA系统中一个重要指标。本文在介绍了 UMTS网络结构的基础上对Qo S的体系结构进行了相关的研究 ,并对 UMTS网络的关键问题进行了分析 ,包括 Qo S的要求、Qo S的参数、Qo S的类别、Qo S的管理等     

MULTI—ELEMENT DETERMINATION OF SOIL SOLUTION BY INAA

One factor of influencing crop growth is the effective elemental contents, especially trace elements, under the circumstances of the same concentrations of N, P and K in soil. In order to obtain the data of effective elemental contents in soil, a novel method was introduced. In this method, soil solution was extracted by a squeezer. The concentrations of elements in soil solution were determined by INAA. Study on the compositions and the contents of elements in soil solution will provide information on making a suitable soil environment for plant growth and for rational and economical manure.