开发周期的缩短，对数据集成服务的需求的增长，促使Web开发人员探索新的技术来构建跨多个数据源的可嵌入式报表。
Short development cycles and increased demand for data integration services are prompting many Web developers to explore new techniques for building embeddable reports that span multiple data sources.
建议把结构简单的对数周期天线，用于CAT V技术，并给出VHF全频道电视接收天线的实例。
Concerning the problem of application, the author suggests to use the simple LP antenna in the techniques of CATV, and a practical design for the receiving antenna covering all VHF TV channels.
详细介绍了对数周期天线扇形阵特性分析软件的功能及使用方法。
The function and usage of the software for analyzing the fan-shaped array of log-periodic dipole antennas are introduced.
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