The systematic study has been made on the problems of wave, nearshore currents, sediment transport related to the coastal evolution of sand beach under the action of wave.
针对与砂质海岸在波浪作用下的演变有关的波浪、近岸流及输沙问题进行了系统的研究，并对结构物附近海岸演变进行了数值模拟。
The thread followed in this paper is to discuss the bilinear paring on the elliptic curve and it usages for the study on distributed cryptosystem and its related problems systematically.
本文主要以椭圆曲线上的双线性对技术为基本贯穿线索，对分布式密码系统及相关问题做了系统研究，重点探讨几类分布式密码系统的关键技术和协议。
The study of distributed involves the study of distributed processing technology, net work technology and database study, which must be related to solution on some real existent problems.
分布式数据库系统的研究涉及分布式处理技术、网络技术和数据库技术的研究，而这些研究必须贯穿在对一些现实问题的解决之中。
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