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文章介绍了国内海洋浮标监测系统的类型、系统组成、监测资料的质量控制和应用概况。将国内常见的海洋浮标监测系统划分为8个类型。监测系统通常由浮标系统、锚泊系统和岸站系统3部分组成,其中浮标系统通常包括浮体、标架、供电设备、防护设备和各类传感器等。近年来研制开发集水文气象水质生物监测于一体的多参数海洋自动监测浮标系统是一个重点,但已有浮标系统监测资料的质量控制和应用还有待进一步研究。 相似文献
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Argos系统作为具备单星定位能力的卫星通信系统,具有功耗低、体积小、全球覆盖以及数据实时性较好等优点,目前在对自然环境的科学观测中得到了广泛应用.从系统运行的角度,阐述了组成系统的平台部分、空间部分和地面部分;结合第二代和第三代Argos系统,分析了平台终端、空间卫星、地面系统以及主要应用四个方面的发展现状;最后对Argos系统发展趋势进行了探讨和展望. 相似文献
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《中国海洋大学学报(自然科学版)》2000,30(Z1):1-12
酵母双杂交系统有利于检测蛋白质与蛋白质、蛋白质与DNA 、蛋白质与RNA和蛋白质与小分子之间的相互作用,因而对分子调控体系的研究起巨大的反 作用。文中系叙述了基于Ga14系统的双杂交技术的应用及其局限性,还介绍了单杂交系统、 双杂交系统、三杂交系统以及Sos恢复系统(SRS)。与其它领域一样,酵母双杂交系统将会在 海洋分子生物学研究中取得成功。 相似文献
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波浪作用下缆船拖带系统非线性运动数值模拟 总被引:1,自引:0,他引:1
基于船舶操纵性运动方程和拖缆的三维动力学运动方程,提出了被拖点位置匹配的方法,建立了拖船—拖缆—被拖船系统整体非线性拖带动力学模型。为了考察被拖船航向稳定性与横向稳性的关系以及波浪载荷作用的影响,被拖船采用水平面四自由度运动方程,并引入了波浪的作用力和力矩。拖船采用PD控制方法较真实地模拟了拖船航向改变的运动过程。对一个拖船—拖缆—被拖船系统(5 000 t的拖船和3 000 t的被拖船)在时域内进行了规则波浪作用下拖带运动的模拟,计算结果表明被拖带船舶在波浪中运动呈现运动稳定、不稳定和临界状态3种可能的特性。根据模拟计算结果,认为波浪中拖带航向稳定是被拖带船舶保持稳性的必要条件。 相似文献
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摘要:在海况环境下,进行船舶运动预测时。由于惯性传感器采集系统本身的电学特性,会产生偏移误差,严重影响一般预测方法的准确性。针对这一问题,在常规LSTM神经网络的基础上,设计改良了一种二元的LSTM网络架构。在船舶运动仿真平台上进行模拟船舶升沉运动实验,并通过惯性传感系统测量仿真平台实时积分位移进行计算验证。验证统计该网络预测结果峰差值均方差0.64%,均值均方差0.42%,峰值均方差0.57%,证实该网络较常规LSTM在船舶运动预测领域具有更好的针对性和适应性,更准确的还原预测实际的船舶运动轨迹。 相似文献
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A continuous observation system of ship drift of ferry boats was developed using Loran C, ship direction, ship speed and wind velocity measurement. A formula to estimate the wind-driven lateral drift of the boat is proposed, and a measuring system of the surface current is described, including a discussions on its usefullness to monitor day-to-day variations of the circulation patterns in the coastal boundary regions of the Kuroshio.This system was applied to observe variations of the circulation in the Kumano-nada, and Enshu-nada Seas south of Japan. Some preliminary results were obtained by using this system as well as other methods. This work focuses on the behavior of warm eddies in the Kumano-nada Sea. The surface current patterns that include these phenomena obtained by the use of the ship drift show good correspondence with currents and thermal structures observed with GEK, CTD, moored current meters and satellite thermal images. 相似文献
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远海浮式结构物与供应船旁靠系泊特性研究 总被引:1,自引:0,他引:1
针对远海浮式结构物与供应船进行旁靠作业时,水动力干扰、两船的相对运动、旁靠系缆系统和护舷系统的受力特征等问题开展研究。建立各船的有限元模型,设计出两船旁靠连接缆系统,选取合适的系泊缆和护舷参数。研究表明:浮式结构物和供应船的横荡、纵荡方向存在一定的同步性或跟随性,幅值相差不大,其它方向的运动并不存在明显的同步特征;供应船的各自由度运动幅值均比浮式结构物偏大;旁靠护舷的受力时历出现了明显的低频效应,说明护舷的受力较大程度上受船体低频慢漂运动的影响;浮式结构物对供应船的水动力干扰较大,当浮式结构物在供应船的上风位置时,表现为屏蔽效应,供应船的运动较小;在其背风位置时,运动加剧,出现多次共振、峰值放大现象,供应船对浮式结构物的水动力性能几乎无影响,因此,供应船从浮式结构物的下风口一侧靠泊作业将更有利于船舶的安全性能。这些研究结论可为实际工程操作提供参考。 相似文献
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A telemetering, recoverable, sonobuoy system for seismic refraction surveying using a single ship is described. The novel feature of the system is two-way telemetry between ship and buoys, enabling the setting of gain controls in the buoys and conservation of battery power between recording periods. This makes it possible to have several widely separated buoys simultaneously record the shots. Thus a reversed or multiple-reversed profile is obtained from a single line of shots. By careful design of the telemetry system, a maximum range of 50 km is achieved with an antenna height of only 50 ft on the ship. 相似文献
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In this study, we propose a fuzzy approach in order to evaluate the maritime risk assessment applied to safety at sea and more particularly, the pollution prevention on the open sea. The work is based on the decision-making system, named MARISA, presented in Balmat et al. (2009). This system allowed defining a risk factor for each ship according to ship’s characteristics and weather conditions. In this novel paper, the proposed system takes into account the ship speed evolution and the ship position with respect to maritime shipping lanes is developed. To validate the method, we present an example of results with real data. 相似文献
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A ship optimal trajectory planning method based on the dynamic model of the ship is presented. First a mathematical modular model is introduced for describing the non-linear dynamics of the ship. Then the problem of optimal trajectory planning is discussed. The trajectory is obtained through the optimization of a time-energy criterion, taking into account constraints on the steering system, environment, non-linearities, and non-convexity of the state space equations. The discrete augmented Lagrangian approach is used to compute the optimal constrained controller. The method was programmed on a HP700 workstation. This approach was applied to automatic ship berthing maneuver 相似文献