Gets a numeric error code from sql server that represents an error , warning or " no data found " message 从sql server中获取一个数值错误代码,它表示错误、警告或“未找到数据”消息。
This paper consists of two parts : on the one hand , the numeric method - nfdtd used to analysis this new kind of antenna is introduced . and its numeric error is analyzed . on the other hand , this new kind of antenna is studied and analyzed by nfdtd 论文的主要内容可分为两个方面:一方面介绍了分析研究这种天线的数值方法? ?非均匀网格时域有限差分法,并对非均匀网格时域有限差分法的计算误差进行了研究。