recurrence n. 1.復回,重現(xiàn),再發(fā);來去,反復,隱現(xiàn)。 2.【數(shù)學】遞歸,循環(huán);回想。 3.〔罕用語〕倚賴。 a recurrence formula 遞推[遞演]公式,循環(huán)公式。 have recurrence to arms 用武力解決。
Abstract : the raining time , process , area and density of the storm resulting in the nenjiang flood in august 1988 and its recurrence period were analyzed . the disaster data of the flood was also presented 文摘:論述了形成1988年8月嫩江大洪水的降雨發(fā)生時間及過程、雨區(qū)范圍、降雨強度,分析了該次洪水的峰、量組成情況及稀遇程度,匯集了災(zāi)情損失數(shù)據(jù)。
Taking a specialized port in eastern guangdong as an example this paper puts forward the layout pattern and design standard of breakwater , i . e . , determining the sectional dimensions of the breakwater according to wave factors of 2 years ' recurrence period , which not only ensures favorable berthing condition in port , but also control effectively the engineering cost 摘要以粵東地區(qū)某專用港為例,對防波堤的布置形式及設(shè)計標準提出按2年一遇波要素確定防波堤斷面尺寸,在保持港內(nèi)有較好的泊穩(wěn)條件的同時,可以有效控制工程投資。