在水下的

To solve the difficult depiction about the underwater counterwork system's static structure and dynamic process by traditional model at one time, and to meet the requirements of modeling for layering and extension, the model based on Object Petri Net was proposed.

针对通常的模型不能同时描述水下对抗系统的静态结构和动态过程，而且在层次化、可扩充性等方面也不能满足建模需求的问题，采用对象Petri网建立了水下对抗系统的模型。

Structural matter drops to hit water with fixed rate phut from certain height, inchoate and main the structure that attacks water process in the light of phut is answered begin research, and press mutation of field of force and Xing Bo to wait to study however to entering the underwater after water less, and add with each passing day as large bridge and marine project much, the construction in these projects and the phenomenon that phut of large construction content also appeared to hit water in use process, like Guangdong 9 rivers big bridge is bumped to break down after collapsing, large area bridge floor falls into surface to wait, the meeting such as mutation of field of pressure of the underwater after this kind of phut hits water and Xing Bo is right all round structural products gives birth to certain influence, evaluate this kind of influence to have real project sense to construction and design.

结构物从一定高度落下以一定速度砰击水面，早期主要针对砰击入水过程的结构响应开展探究，而对入水后水下压力场突变和兴波等却探究较少，而随着大型桥梁和海洋工程日渐增多，在这些工程的施工和使用过程中也出现了大型结构物砰击入水的现象，如广东九江大桥被撞垮塌后大面积桥面落入水面等，这种砰击入水后水下压力场突变和兴波等会对四周结构物产生一定影响，评价这种影响对施工和设计具有现实的工程意义。

As a result, the wave-induced erosion on sea bed is confined within the limited area that lies between the stable coastline and subaqueous slope where erosion is decline.

此时，自废黄河口向南出现了大片水深超过-10 m的深水区，说明在此期间水下三角洲-5 m～-10 m间的水下斜坡的侧向侵蚀是十分强烈的。

With the test model of underwater vehicle based on undulatory propulsion of long flexible fin as background, the paper mainly studied how to construct the test system which can satisfy the static and dynamic hydrodynamic force and moment measurement requirements of diversified test models of underwater vehicle fixed at arbitrary attitude.

以基于仿生柔性长鳍波动推进的水下机器人试验模型为背景，主要研究如何构建满足多种水下机器人试验模型在各种姿态下流体动力／力矩的静态与动态测量要求的测试系统。

The water/metal fuel motor system configuration is based on a numerical simulation of combustion.

水反应金属燃料发动机[1]是一种全新概念的水下高能量密度推进系统，其工作原理为：雷外海水在速度头作用下进入燃烧室，与燃烧室中以一定形态存在的金属燃料发生强烈放热反应，产生的热量使未参与反应的海水受热蒸发，混合高压气体通过发动机喷管膨胀做功产生推力，从而推动水下航行

Are discussed. There is very important meaning to develop the underwater shipwake research depending on current well-found equipment on the condition that key techniques are resolved.

借助于目前成熟的设备，在攻克了关键技术的前提下，可以实现水下显微高速摄影，这对开展水下尾流的研究具有十分重要的意义。

Anechoic coating is crucial to the submarine stealth technology and is a major part of quiet-submarine design .

声学覆盖层是水下航行体隐身的一项关键技术，在安静型水下航行体设计中占有十分重要的地位。

In mid-1970s, Soviet Navy adopted an underwater APS assault rifle for its combat divers, to provide underwater security against enemy frogmen and specially trained sea animals.

在70年代中期，苏联海军的水下通过接入点突击步枪的作战潜水员，提供对敌方蛙人和受过特别训练的海洋动物即海豚水下安全。

Photo Gallery: Underwater Scenes Photographer Emory Kristof has pushed the boundaries of underwater photography over his long career, from pioneering the invention of remotely operated vehicles, high intensity lighting, and robot cameras, to exploring wrecks like the Titanic and shooting deep sea creatures like these fish and floating salps in the Bowie Seamount.

水下景色场面图集。摄影师埃默里（ Kristof的边界推向了水下摄影超过他的长期职业生涯中，从首创发明的遥控操作车，高强度的照明，和机器人摄影机，以探索沉船像铁达尼号，并拍摄深海生物一样，这些鱼和浮动salps在该鲍伊海山。

Photographer Emory Kristof has pushed the boundaries of underwater photography over his long career, from pioneering the invention of remotely operated vehicles, high intensity lighting, and robot cameras, to exploring wrecks like the Titanic and shooting deep sea creatures like these fish and floating salps in the Bowie Seamount.

意译：水下景色图片。摄影师埃默里克里斯托夫推动了边界水下摄影，他长期的职业生涯，从开创性的发明，遥控车辆，高强度照明，摄像机和机器人，以探索沉船比如泰坦尼克号和拍摄深海生物像这些鱼和浮动的樽海鞘在鲍伊海底山。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。