2008年12月的一次严重洪灾再次让人们注意到威尼斯脆弱的状态和即将成为水下城市的命运。
A severe flood in December 2008 brought renewed attention to Venice's vulnerable state and imminent fate as an underwater city.
EarthSky也采访了伍兹·霍尔海洋研究所的海洋学家布瑞克·欧文斯，他所在的团队安装了安装一个水下机器人，直接测量原油泄露处及其周围洋流的状态。
EarthSky also spoke with oceanographer Breck Owens at Woods Hole Oceanographic Institution, whose team has released an underwater robot to directly measure currents in and around the oil spill.
在蝌蚪状态以及变态成幼年角蛙之后，它们都能够在水下发出叫声。
They continue to emit distress calls underwater both as tadpoles and after they have begun metamorphosis (when they become froglets).
他热爱深海潜水，水下的失重状态和千奇百怪的生命体给了他最接近漫游外太空的感觉。
He came closest to visiting alien worlds through his love of deep-sea diving, its weightlessness and strange life forms.
水下训练模拟失重状态是太空训练的一个组成部分。
Underwater training simulating conditions of weightlessness is part of space crew training.
声呐浮标测试系统能够模拟水下声信号，用以检测声呐浮标的工作状态和性能。
The sonar buoy testing system can emulate signal of underwater sound and detect the operating status and performance of sonar buoy.
智能水下机器人（AUV）在近水面的运动中，由于波浪干扰力的作用，运动状态会发生明显变化，其近水面的定深控制是比较困难的。
The motion of Automous Underwater Vehicle (AUV) changes obviously when it sails near surface under the influence of ocean waves, so it is difficult to sustain the depth.
对水下航行器热动力推进系统的非线性模型进行了线性化处理，应用线性二次型控制方法设计了系统的最优控制器，采用极点配置的方法设计了系统的状态估值器。
Forward the foundation and linear of the system model, the optimal controller and the state observer were designed by using the optimal control theory and the manner of pole configuration.
水下划水的整个过程中肘关节应该维持弯曲状态，这样肘关节的高度依然高于手的高度。
The elbows should be bent throughout the underwater cycle so that again, they are positioned higher in the water than the hand.
通过硬件定时模块配合控制程序，实现了水声释放器在突发状态下可靠的回收水下设备。
The reliable recovery of the underwater devices by the underwater acoustic releasers in emergency is realized through the timing module of hardware coupled with the controlling programs.
潜艇结构水下碰撞是潜艇的主要事故形式，也是船舶碰撞最为危险的状态之一。
The collision of submarine structure under water is a main accident form and one of the most dangerous states for ship collision.
针对机器人在水下作业的特点，分析了有波浪作用时机器人在船体表面的运动，建立了机器人在船体表面静止和运动两种状态下的力学模型。
Considering the underwater work environment, the author analyses the robot movement on the ship hull with wave action, and establishes mechanics model of the robot in stationary and moving state.
本文阐述了水下流噪声产生的机理以及物体表面状态性能对湍流边界层的影响。
In this paper, the mechanism of flow noise production and the methods of flow noise reduction are presented.
潜艇水下运动是六个自由度的多姿态运动，建立空间运动方程数学模型是计算机仿真时对其进行比较准确的描述和对运动状态进行仿真研究的关键。
The submarine underwater motion is the 6d motion multi-stance movement. It requires quite exact description and dynamic simulation research. The key technology is to create submarine motion equation.
本文采用数值求解RANS方程的方法，对于水下航行体表面状态细节（小突体、孔穴）的流动特性进行了研究。
The flow characteristics of protrusions and holes on a submerged body are studied by solving the RANS equations.
从流体力学的基本方程出发，根据水下排气管口流动状态的观察，推导了柴油机水下排气管口辐射噪声与管口处气体流动参数之间的理论关系。
In the paper, we have done theoretical studies of sound radiated from the submerged exhaust exit when a diesel engine discharges pulsive exhaust gas into water.
确保水下电视处于良好的状态303。
确保水下电视处于良好的状态303。
应用推荐