在表格和插图中加入【 [h] 】即可,如下:
egin{table}[h]
caption{The summary of the notations frequently used in this paper}
label{tab:notations}
setlength{ abcolsep}{3pt}
egin{tabular}{|p{50pt}|p{180pt}|}
hline
Notation&
Definition\
hline
注意,这里用大写H不行,要用小写h。