摘要
根据潮汐动力学寻找高频潮族与低频潮族之间可能的相互作用关系,在只考虑相角变化率的情况下,建立一个简化的浅水准调和分析模型.连云港多年实测数据检验结果表明:相对于原准调和分析模型,简化的浅水准调和分析模型中最小二乘法的法方程组系数矩阵条件数小很多,简化后的模型计算更为稳定.在实测数据时间较长的情况下,简化前后的模型预报精度相当;当实测数据时间较短时,原准调和分析模型没有传统的调和分析模型预报结果精度高,而简化后的浅水准调和分析模型的预报结果与传统的调和分析模型相比,结果精度相当,特别是简化后的模型与原准调和分析模型相比,计算时间减少了68%.
Based on the probable interaction between the tides with high-and low-frequency according to the tidal dynamics, a simplified quasi-harmonic analysis method for shallow water was established only considering change of the phase rate. Compared with the original quasi-harmonic analysis method, the new method using the observed data of Lianyungang had less conditional number of the coefficient matrix of the normal equations in its least square method, and the algorithm was more stable. When the observed data have a long record, the precision of the original and simplified methods is almost the same, when the observed data has short record, the precision of the original harmonic analysis is lower than that of the traditional harmonic analysis. However, the results of the simplified quasi-harmonic analysis method have certain improvement compared with those of the traditional harmonic analysis, especially that the computation time is saved by 68 %.
出处
《河海大学学报（自然科学版）》
CAS
CSCD
北大核心
2009年第5期611-614,共4页
Journal of Hohai University(Natural Sciences)
基金
河海大学自然科学基金(2084/408306)
教育部科学技术研究重点项目(104104)
江苏省普通高等学校高新技术产业发展项目(JH03-010)
关键词
浅水潮汐
准调和分析
潮汐预报
shallow-water tide
quasi-harmonic analysis
tidal prediction
