共查询到20条相似文献,搜索用时 945 毫秒
1.
海洋地震勘探中,多震源同时激发的高效采集方法越来越受到油公司的青睐,该采集技术可提高施工效率,极大降低勘探成本,通过增加炮点密度提高地震勘探采集效果。但是,这种采集方式也面临着震源高效激发混合采集带来混叠噪声的挑战。作为实际采集试验的有效替代,采用波动方程模拟海上宽方位采集地震数据,仿真多船4震源高效激发的宽方位高效采集模拟记录,探索提出有效分离高效采集混叠记录的方法和流程。通过对模拟数据的处理,有效分离了高效激发混合采集带来的多震源能量的干涉,为海上高效采集生产推广探明了方向。 相似文献
2.
采用智能水下机器人进行海洋环境的立体监测具有监测范围广,自主性强的特点。本文在探讨世界各国采用智能水下机器人进行海洋环境监测的情况的基础上,介绍了自主研发的智能水下机器人海洋大范围环境数据的自主采集系统,其主要优点是:相对于其他机器人,可实现“大范围” 海洋环境数据的采集;相对于固定式浮标,可实现海洋环境数据的“自主”采集。并给出了自主采集流程和软件分层递阶体系结构。在真实海域中,采用智能水下机器人,进行了国内首次大范围环境数据采集实航实验。实验结果表明采用智能水下机器人进行海洋环境的立体监测是切实可行的。 相似文献
3.
我们开发了一套名为“MB-SEystem”的新软件包,用来处理和显示由R/V Mau-rice Ewing船采集的Hdrosweep DS多波束数据,这套新软件所包含的工具有:模式化声速剖面;根据声速剖面,利用射线追踪,由声波传播时间计算多波束测深值;对多波速测深值的人工交互和自动编辑;以及运算和显示多波速数据的其它各种工龄,一个模块化的输入/输出库允许MB-system程序存取和运算数据,这些数据可以是任何一种刈幅成图声纳数据格式所支持的数据,它可以收以下设备采集;Hdrosweep DS、“古典式”SeaBeam、SeaBeam2000、SeaBesm2100、H-MR1、Simrad EMl2及其它声纳设备。本文提供了一个利用该软件对最近由R/V Maurice Ewing船采集的Hydrosweep数据进行处理的应用实例。 相似文献
4.
YSI的工作原理与操作步骤 总被引:1,自引:0,他引:1
介绍YSI(金泉仪器)探头的安装、测量原理和操作过程。通过实践,有明YSI现场采集多参数数据十分便捷,仪器性能稳定,数据也较为准确可靠。 相似文献
5.
李升贵 《海洋与海岸带开发》2010,(6):49-57
极地科学数据作为极地科学考察活动所产生的原始性、基础性数据及其实验分析研究结果,具有重要的科学价值、经济价值和社会价值。我国极地科学考察和研究持续开展了20多年,采集了大量极地科学数据,这些数据是国家花费大量的人力、物力和财力取得的,是我国极地研究的基础, 相似文献
6.
结合多核CPU硬件PC平台,设计了一种海底三维声学图像实时处理系统,主要包括声学前端信号处理子系统、数据传输控制子系统和PC客户端图像处理系统三个部分。声学前端信号处理子系统统根据接收到的多路声学换能器信号,通过两级FPGA信号处理,采集多通道水声信号,进行实时电子聚焦波束形成。为了解决海量声学数据快速传输问题,数据传输控制子系统未采用传统用户空间TCP/IP传输机制,而是直接通过嵌入式PowerPC处理器在Linux内核态采用DMA通道进行声学数据转发,减少系统调用和数据拷贝开销,有效提高网络传输效率。针对海量声学数据实时处理需求,PC客户端图像处理系统通过对复杂、耗时的单帧重建和数据拼接算法模块根据声学数据点的角度范围进行等分分割,对每个子范围声纳数据采用多线程并行处理,均衡多个CPU核之间负载,实现高性能三维声学图像实时处理。通过室内水池和湖试实验,结果表明该系统能够实时高效地进行三维声学图像采集、传输与处理。 相似文献
7.
8.
9.
在水深测量中,合理地采集水深数据是确保高质量测图不可或缺的环节。为了高效合理采集水深数据,测量前的测线合理布设和测量中的航迹控制是两个关键点。本文提出了用于计划测线布设与航迹控制的算法,并对其进行了理论上的推导与分析,同时在新研制的水深数据采集系统中得以应用,证明以所提出的算法进行测线布设与航迹控制是有效的。 相似文献
10.
11.
The material of marine sediments is commonly derived from multiple sources or processes. Consequently, individual sediment samples can be viewed as mixtures of two or more distinct geochemical subpopulations. Certain quantitative procedures such as threshold value analysis are capable of isolating and identifying the subpopulations that are present within a suite of sediment samples through an analysis of bulk sediment compositional data. Thus, these methods are useful in mineral exploration programs because they facilitate the task of discriminating between samples containing background versus anomalous chemical signals. This study reports the development and testing of computer software (ProbabilityGrapher) for threshold value analysis using a probability graphing technique. This program is designed for microcomputers so that it can be readily applied in field situations where the rapid in situ reduction and interpretation of geochemical data is important to the planning and continuation of an exploration survey. The software can also be used in concert with the Q—LM software package previously developed for Q‐mode factor analysis and linear modeling, thus providing a powerful combination of data reduction and interpretation tools for investigating sediment composition information. 相似文献
12.
13.
HYPACK综合导航定位系统是广泛应用于海洋工程水下地形地貌测量的数据采集和处理软件,它支持多种定位设备和测深设备的数据采集和处理。如何正确提取所需的数据、满足不同工程测量的特殊要求,是我们在实际使用中经常碰到的问题。分析了实测HYPACK数据,以VISUAL C 6.0为平台进行程序开发,实现了在HYPACK记录的原始文件中特定数据的处理,如航迹(点位)坐标、水深值、潮位数据等。所开发的程序实现了数据的图形可视化和由数据向DXF格式的转换,实现了数据编辑和图形效果的交互。 相似文献
14.
Carl T.F. Ross Philipp Kster Andrew P.F. Little Giles Tewkesbury 《Ocean Engineering》2007,34(3-4):560-575
The paper reports on a theoretical and an experimental investigation carried out on a thin-walled hemi-ellipsoidal prolate dome in air and also under external water pressure. The investigation found that there was good correlation between experiment and theory. The theoretical investigation was carried out using the finite element analysis to model both the structure and the fluid. The theoretical investigation used two different programs, one of which was the giant computer program ANSYS and the other was an in-house program developed by Ross. For the shell structure, the ANSYS program used 2 different doubly curved thin-walled shell elements, while the in-house program used a simpler axisymmetric thin-walled shell element. This axisymmetric element allowed a sinusoidal variation of the displacements in the circumferential direction, thus, decreasing preparation and computational time. Agreement between the 3 different finite elements was found to be good. This was found particularly encouraging for the in-house software, as it only took a few hours to set up the computer model, and a few seconds to analyse the vessel, whereas the ANSYS software took several weeks to set up the computer model, and several minutes to analyse the shell dome. The ANSYS software, however, did have the advantage in producing excellent graphical displays in both the pre-processing and post-processing modes. 相似文献
15.
16.
17.
18.
19.
We present a method for the determination of the trajectory of a sounding instrument and its drift velocity in the field of
currents nonuniform in depth and develop special software for IBM/PC compatible computers. The proposed method and software
are checked by using the well-known analytic solution of a similar problem given by Academician A. N. Krylov. We also consider
some special examples of application of the developed method to the processing of the data of an OLT profilometer.
Translated by Peter V. Malyshev and Dmitry V. Malyshev 相似文献