电磁式浪潮流仪测量方法及结果分析

海流是基础的海洋资料,海流计是海洋水文测量的重要设备。本文简单介绍了海洋环流的成因和分类,阐述了电磁式浪、潮、流仪的工作原理,着重介绍了电磁式浪、潮、流仪流速和流向的计算方法,通过测量数据结果并以曲线的方式分析该型设备的工作性能。     

快速擦写存贮器在水文基本数据自动收集设备中的应用

一、水文基本数据的特点江河湖泊、水库的水位、雨量是基本的水文资料。水文基本资料收集，要求准确、可靠、及时，能真实记录水文要素变化的过程，为进一步的科学分析提供原始数据。这在兴建水利设施，抗旱防洪，水情调度等方面有着重要的意义。水文基本数据收集，是对自然现象的测量记录，其特点是长期性、连续性和随机性，且数据量大。而收集站点多在野外，分散分布。在我国，许多水文测站目前仍主要采用人工观测、人工记录的方式来收集数据。后期资料分析也比较烦琐。根据我国水文基本资料收集的要求，借鉴分析国内外同类产品的特点，我…     

LHZ1—1型海岛海洋站自动观测系统

一、概述目前，我国气象台（站）及各海洋台（站）的水文、气象要素的观测，大多是人工或半自动观测，尤其是海岛海洋站，条件恶劣，观测工作更加困难，很难保证观测资料的连续和完整。LHZ1－1型海岛海洋站自动观测系统是适用于沿海各海洋站、海岛、河口、海上石油平台、大型水利工程等处自动观测水文和气象的多要素全自动观测系统。该系统已通过专家鉴定。鉴定结论：LHZ1—1型海岛海洋站自动观测系统达到90年代初期国际同类设备的先进水平。该系统测量水文项目：潮汐、海浪、表层海水温度。气象项目：风速、风向、气压、空气温度和湿度…     

线性提取幅度信息及其数据预处理在水文仪器中的应用研究

当气象水文海洋仪器所观测的物理量和信号的幅度（强度）成某种关系时，线性提取信号的幅度信息就成为至关重要的首要问题。本文介绍一种线性提取幅度信息及其数据预处理的的工作原理、电路结构和实验结果，可供参考。     

深海自容式加速度测量装置的设计与实现

基于海洋平台水下立管监测的需求,研发了一种特殊的水下自容式加速度测量装置。该装置能够完整记录立管的浪致振动和涡激振动信息,可为分析立管的疲劳损伤及立管的设计提供参考依据。它具有高灵敏度、低功耗、海量存储和体积小等特点,同时内设故障自恢复机制,确保系统连续正常工作。在我国南海"挑战者号"平台实测170多天,各项性能指标完全达到了设计要求,这是我国海洋平台监测首次使用自主研发的同类测量装置。相比于国外同类产品,成本更低,独立工作时间更长,适于大范围多点长期测量。     

船载式测波仪的系统组成及工作原理

文章结合工作实际,对船载式测波仪的系统组成、工作原理及技术指标等进行了详细的论述,对于海洋水文测量设备的更新换代具有一定的指导意义。     

一种输变电设备多源数据处理系统的功能设计

针对输变电设备状态评估数据来源多样、平台繁多以及数据质量参差不齐的问题,通过对输变电设备状态评估数据特点进行研究,提出了一种输变电设备多源数据处理系统的功能设计。设计了可提高设备状态评价、负载能力评估时多源数据质量的包含数据获取、跨平台接入、数据预处理及初步清洗、质量评价模型、规范化转换、数据输出等环节在内的系统功能。将输变电设备多源数据处理系统应用于大数据平台,研究了异构大数据的预处理、分布式存储和高效检索技术;分析了面向输变电大数据分析的核心算法及并行化技术。研究结果表明,运用输变电设备多源数据处理系统搭建的大数据全耦合分析模型框架可应用于电网,为生产运维人员评估输变电设备及电网风险提供数据支持。     

基于SOA架构的动设备集群化监测诊断系统设计及应用研究

海洋石油平台的众多关键动设备在海洋油气生产工艺中起着重要的作用。为保障国家能源安全，紧跟目前机械行业数字化趋势，海洋石油积极开展设备设施完整性管理和数字化建设，针对关键机组开展基于在线监测系统的预测性维修。文中针对海洋石油的特点、多类型监测系统、开放性架构需求等因素，提出基于SOA架构的集群化监测诊断系统。通过应用，能够有效实现多类型机组的在线监测集群化管理和预测性维修服务。     

输变电设备多源数据处理系统的功能设计

针对输变电设备状态评估数据来源多样、平台繁多以及数据质量参差不齐的问题,通过对输变电设备状态评估数据特点进行研究,提出了一种输变电设备多源数据处理系统的功能设计.设计了可提高设备状态评价、负载能力评估时多源数据质量的包含数据获取、跨平台接入、数据预处理及初步清洗、质量评价模型、规范化转换、数据输出等环节在内的系统功能.将输变电设备多源数据处理系统应用于大数据平台,研究了异构大数据的预处理、分布式存储和高效检索技术;分析了面向输变电大数据分析的核心算法及并行化技术.研究结果表明,运用输变电设备多源数据处理系统搭建的大数据全耦合分析模型框架可应用于电网,为生产运维人员评估输变电设备及电网风险提供数据支持.     

海洋石油平台设备风险维修策略研究

海洋石油平台设备在运行过程中,由于海风损坏、海水腐蚀和设备磨损等原因,会导致性能下降或者受损;因此,加强海洋石油平台设备维护十分重要。本文阐述了海洋石油平台设备的技术特点,重点分析了海洋石油平台设备风险维修特点、优势、程序和步骤;同时,进一步探讨了海洋石油平台设备风险维修措施,具有一定的参考价值。     

Minimal Realization of Linear Graph Models for Multi-physics Systems

An engineering system may consist of several different types of components,belonging to such physical"domains"as mechanical,electrical,fluid,and thermal.It is t...     

On the Relation of Load to Average Gap in the Contact Between Surfaces with Longitudinal Roughness

A computer simulation model for the contact between longitudinally-oriented rough surfaces has been formulated. This model closely duplicates the actual surf ace contact deformation behavior by taking into account the elastic interactions between the asperities. There were no assumptions made about the shapes, or any deformation behavior of the asperities, except for their obeying the laws of elasticity. The plastic deformations on the high asperity peaks were taken into account by setting a ceiling on their contact pressures at the material hardness value. The simulations used real surface profiles which were digitized from unworn circumferentially ground steel surfaces. Each pair of these profiles was mathematically combined to form an equivalent rough profile pressing against an infinitely rigid flat and having the appropriately adjusted elastic modulus. A total of 28 different pairs of profiles were used in the simulations. Each contacting pair was subjected to 30 different load levels and the local contact pressures and deformations were calculated. The contact simulations yielded some important mathematical relationships between parameters, such as the real area of contact, average gap, and average asperity load through statistical curve fitting. Two analytical functions were generated to relate the average load to average gap and the real area of contact to load.     

三绕组变压器的双绕组等效建模及在Matpower中的应用

针对实际电网存在着大量的三绕组变压器,但国际上一些著名商业软件,如BPA仿真软件、Matpower这一权威潮流计算开源软件,均只提供双绕组变压器模型,限制了其在具有三绕组变压器的电力系统中的应用的问题,潮流计算是自主开发的电力系统各种应用软件的核心模块,因此依托国际权威开源程序进行二次开发,是一种较好的选择。对Matpower要求的数据格式进行了归纳,对变压器的一般的等值电路及带理想变压器的等值电路和带标幺值的等值电路进行了分析研究,提出了三绕组变压器转换为双绕组等效模型的建模方法,使得原先只适应双绕组变压器的潮流计算软件可以适用于三绕组变压器电网的潮流计算;最后以Matpower软件为例进行了案例计算,并用PSASP仿真软件进行对比验证。研究结果证明,所提出的建模方法是有效的。     

Quantum Cooperative Robotics and Autonomy

The intersection of Quantum Technologies and Robotics Autonomy is explored in the present paper.The two areas are brought together in establishing an interdisci...     

电站锅炉模糊风险评价方法研究与应用

针对电站锅炉风险等级评价问题,将模糊综合评价技术应用到电站锅炉风险等级评价中。开展了电站锅炉失效影响因素及模糊评价因素的重要程度分析,建立了一套科学合理适于在线评价的电站锅炉风险评价体系,提出了模糊综合评价技术与改进的模糊层次分析法相结合的模糊风险评价方法,利用改进的模糊层次分析法计算了指标体系中各层指标权重。对某一台电站锅炉的实际运行工况影响子因素进行了模糊风险评价,采用模糊合成算子进行模糊综合运算得到电了站锅炉运行工况影响子因素的评价向量。研究结果表明:电站锅炉的运行工况影响子因素的风险评价等级为第6级,失效可能性等级为小,该电站锅炉运行工况良好。     

考虑进油孔有限长滑动轴承油膜力的近似解析解

针对具有进油孔的有限长滑动轴承油膜力求解问题,采用变分原理和分离变量法,求得了有限长滑动轴承油膜压力分布的近似解析表达式。将油膜压力分布的近似解析表达式在油膜存在区域上进行积分,即得到了油膜力。将提出的计算有限长滑动轴承油膜力方法与无限长轴承模型、有限元方法的计算结果进行了比较,发现了提出的方法与有限元方法的计算结果很接近。最后,研究了进油孔位置和进油压力对油膜存在区域、油膜力等的影响,研究结果表明进油孔位置和进油压力对油膜存在区域和油膜力有较大的影响。     

Fifth International Summer School on Screw-Theory Based Methods in Robotics

正3-11 September,2014University of Bologna,Bologna,Italy www.summerscrews.org summerscrews2014.ing.unibo.it SUMMER 20SCREWS 14In 2014,our screw-theory school comes to the world's oldest university.In early September,Summer Screws'14 will gather six experts in the application of screw theory in robotics and up to 40 participants at the University of Bologna,Bologna,Italy.The school will teach attendees how to apply existing methods and empower them to develop new ones in their own research.The basic theoretical notions will be introduced in a rigorous manner,emphasizing examples,applications,and exercises.Scholarships are available.     

交通荷载作用下桥梁结构参数识别方法

应用动力节点加载法,将作用在桥梁上的交通荷载转化为等效节点荷载,再用两步构造法识别结构物理参数.第1步,用Newmark-β方法变换结构运动方程,并用结构的加速度响应求得变换空间内的位移、速度和加速度响应;第2步,基于最小二乘原理,构造出变换空间内求解结构参数的递推式,进行结构物理参数识别.数值模拟结果表明,在交通荷载作用下,该方法能够快速、准确地进行桥梁结构参数识别.     

INTEGRAL EQUATION METHOD＇S APPLICATION IN HOLE-EDGE STRESS OF COMPOSITE MATERIAL PLATE WITH DIFFERENT SHAPED HOLES

The strength of composite plate with different hole-shapes is always one of the most important but complicated issues in the application of the composite material. The holes will lead to mutations and discontinuity to the structure. So the hole-edge stress concentration is always a serious phenomenon. And the phenomenon makes the structure strength decrease very quickly to form dangerous weak points. Most partial damage begins from these weak points. According to the complex variable functions theory, the accurate boundary condition of composite plate with different hole-shapes is founded by conformal mapping method to settle the boundary condition problem of complex hole-shapes. Composite plate with commonly hole-shapes in engineering is studied by several complex variable stress fimction. The boundary integral equations are founded based on exact boundary conditions. Then the exact hole-edge stress analytic solution of composite plate with rectangle holes and wing manholes is resolved. Both of offset axis loadings and its influences on the stress concentration coefficient of the hole-edge are discussed. And comparisons of different loads along various offset axis on the hole-edge stress distribution of orthotropic plate with rectangle hole or wing manhole are made. It can be concluded that hole-edge with continuous variable curvatures might help to decrease the stress concentration coefficient; and smaller angle of outer load and fiber can decrease the stress peak value.     

INDUSTRIAL ENGINEERING AND VISUALISATION-A PRODUCT DEVELOPMENT PERSPECTIVE

Taking the actual project of teaching and researching process for example, the relationship between the industrial engineering and product development is discussed. And use the novel visualization technology to support the industrial engineering and product development. How to use the new computer modeling and simulating technologies to support the product development and industrial engineering, is introduced especially. The support includes both domestic products and industrial systems. The visualization and computer technologies take a very important role in some system or multi-direction modeling, those technologies mentioned above can help the industrial engineers study the effect of design on the whole life circle, including the producing steps. So the engineers can avoid making the wrong decision which may cause bad effects on the whole industrial engineering.