YZ-Ⅲ型遥测波浪仪     

陆蔼庆  李世山  曹洁玉  于新生  秦朝阳 《海洋科学》1989,(4)

本文论述了作者所研制的YZ-III型遥测波浪仪的原理、结构和性能。该仪器具有利用加速度原理工作、高精度、高分辨率、高可靠性和连续工作等特点。介绍了该仪器系统动态标定和海上试验情况。  相似文献   

动力天文中常用多步方法的比较（Ⅱ）     

赵长印 《紫金山天文台台刊》1997,16(4):246-250

本文从几个方面给出了动力天文中三种常用的多步积分方法的比较结果,为积分器的选择提供了依据。  相似文献   

On the study of control effectiveness and computational efficiency of reduced Saint-Venant model in model predictive control of open channel flow     

M. Xu  P.J. van OverloopN.C. van de Giesen 《Advances in water resources》2011,34(2):282-290

Model predictive control (MPC) of open channel flow is becoming an important tool in water management. The complexity of the prediction model has a large influence on the MPC application in terms of control effectiveness and computational efficiency. The Saint-Venant equations, called SV model in this paper, and the Integrator Delay (ID) model are either accurate but computationally costly, or simple but restricted to allowed flow changes. In this paper, a reduced Saint-Venant (RSV) model is developed through a model reduction technique, Proper Orthogonal Decomposition (POD), on the SV equations. The RSV model keeps the main flow dynamics and functions over a large flow range but is easier to implement in MPC. In the test case of a modeled canal reach, the number of states and disturbances in the RSV model is about 45 and 16 times less than the SV model, respectively. The computational time of MPC with the RSV model is significantly reduced, while the controller remains effective. Thus, the RSV model is a promising means to balance the control effectiveness and computational efficiency.  相似文献