查询词典 underwater

This thesis compares the characteristics of secondary batteries used for the underwater system in order to find a proper power source that is suitable for the system. Moreover, the low-cost integrated circuit and buck-type converters are used to obtain the required voltage levels for the devices in the system such as the underwater acoustic modem, single board computer and vertical line array hydrophone with condition amplifiers.

中文摘要本文针对常用於水下遥测系统之二次电池进行特性比较，以选用适合作为其电源之电池，再将电池输出电压经低成本之类比IC与降压型转换器转换至符合本系统设备如水下数据声传器、水下遥测单版电脑与垂直阵列麦克风讯号放大器等所需之电压等级。

A Virtual Instruments based system for underwater electroacoustic transducer calibration was developed to automatize underwater acoustic measurements.

为了提高水声换能器校准的自动化程度和精度，研制了一套基于虚拟仪器技术的八通道水声校准与分析系统。

As the development of modern electronic technology, the high efficiency and broad band acoustic transmitter for the battery using equipments, such as acoustic buoyage, portable underwater acoustic communication equipment and small scale underwater detector is demanded.

随着现代电子技术的发展，一些使用电池供电的水声设备如水声浮标、便携式水声通信设备、便携式水下探测设备等对发射机高效率、宽频带的要求越来越高。

Underwater color photography was born with this shot of a hogfish, photographed off the Florida Keys in the Gulf of Mexico by Dr. William Longley and National Geographic staff photographer Charles Martin in 1926. Equipped with cameras encased in waterproof housing and pounds of highly explosive magnesium flash powder for underwater illumination, the pair pioneered underwater photography.

意译：海底下的彩色图片诞生在摄影一种猪形之鱼，照片来自佛罗里达的墨西哥海湾，由威廉博士长期和国家的路杂志的摄影师查尔斯·马丁合作于1926年预备防水设备的照相机和高曝光的镁闪光粉保证能够在水下照明，他们成为水下摄影的先驱者。

Underwater plasma sound source, namely underwater sparker, is a significant application of pulsed discharge in water, which has been employed for underwater acoustics and sea oil prospecting.

水下等离子体声源是水中脉冲放电技术在水下声学和地震勘探技术方面的一个重要应用，又称为电火花震源。

In view of the key problem of subminiature underwater robots, structural improving,control algorithm and underwater experiment is studied. They can be described as follow: Firstly, the subminiature underwater robot should be compact in size and low cost, for which, it is difficult for us to control its balance. So that, a new kind of piston--style ups and downs system was invented, which can keep the underwater robot horizontally suspended in the water without driving force.

中文摘要本文针对超小型水下机器人在运动中存在的问题，设计了一种新的超小型水下机器人的沉浮结构形式，着重研究了其运动学动力学性能、探讨了相应控制算法、进行了水下试验，具体研究内容如下：首先，超小型水下机器人由于体积小重量轻，在水中沉浮时悬停平衡控制困难，为此进行了一种新的活塞式沉浮系统设计，该系统使水下机器人能够在无动力驱动的情况下，使其呈水平状态稳定悬浮在水中。

The first kind deposition sequence is the superposition underwater distributary, forming chlorite and Laumontite cementation near the side of lake. The second deposition sequence is underwater distributary, forming chlorite and calcite cementation. The third deposition sequence is underwater river-bay, forming calcium and mud cementation.

第Ⅰ种沉积序列为迭置水下分流河道微相，主要发育绿泥石－浊沸石胶结相，在迭置水下分流河道靠近湖盆一侧；第Ⅱ种沉积序列为水下分流河道微相，主要发育绿泥石－方解石胶结相；第Ⅲ种沉积序列为水下分流间湾微相，主要发育钙质－泥质胶结相。

Based on the experiment platform of underwater vehicle control system made by ourselves, an underwater demonstration experiment system is developed with forward-looking cameras and man-made targets. Underwater demonstration experiments with the two station keeping methods are made in an indoor experimental pool.

以自行研制的水下机器人控制系统实验平台为实验载体，利用前视摄像机和水下人工目标，建立了水下演示实验验证系统，并在室内实验水池中，分别实现了两种悬停方法的水下演示实验。

Its total underwater explosive energy is 184% TNT equivalent, explosion heat is 7473J/g, it takes the lead of domestic TNT base underwater explosive, its safety conrrespond to RS211 explosive, its overall performance is good, it suits to filling explosive of underwater ordance warhead.

该炸药水下爆炸总能量为184%TNT当量，爆热为7437J/g，达到了当前国内梯恩梯基水下炸药的领先水平，其安全性与RS211炸药相当，综合性能优良，适用于水中兵器战斗部的主装药。

Methods: dividing 56 the effect of underwater setting-up exercises on spondylitis ankylosans patients into two groups, control group and underwater exercises group. the control group undergoes medicine treatment and the underwater exercises group practices underwater exercises 5 times per week for 5 weeks.

将50例强直性脊柱炎患者随机分为两组：对照组和水中健身操组，对照组进行药物治疗，健身操组进行健身操练习每周5次共训练12周，观察水中健身运动对schober实验、指地距、枕墙距、颌胸距等的影响。

It is also known as one of the most poisonous naturally occurring substances.

它也被称为一个最自然发生的有毒物质。

The greatest stress is found at the location on the cross section where V is the largest.

最大应力出现在横截面上V为最大的地方。