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2018 International Interdisciplinary PhD Workshop (IIPhDW)最新文献

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Analysis of reactivity changes during the operation of a nuclear power plant 核电站运行过程中反应性变化的分析
Pub Date : 2018-05-09 DOI: 10.1109/IIPHDW.2018.8388326
J. Sierchuła
In 2017, 449 nuclear reactors were operating for electricity generation in the world. More than 60% of all reactors were represented by pressurized water reactors. One of the most modern reactors of this type is the AP1000 reactor, developed by Westinghouse. The mentioned construction is also taken into account in terms of the construction of the first nuclear power plant in Poland, for both economic and technical reasons as well as safety systems, which have been very extensive and implemented in this construction. In the following paper, apart from the presentation of the nuclear power plant technology system, model of AP1000 reactor was presented. Above mentioned model allows, among other things, to investigate the influence of fuel assemblies locations on the effective neutron multiplication factor/reactivity. In addition, the relation between moderator and neutrons energy was examined (the neutron flux density was determined as a function of energy) and the amount of fission products generated in the reactor core during normal operation was presented. The obtained results were analysed and referenced to the literature data in order to verify the created model.
2017年,全球共有449座核反应堆在运行发电。压水堆占所有反应堆的60%以上。这种类型的最现代化的反应堆之一是由西屋公司开发的AP1000反应堆。由于经济和技术原因以及安全系统的原因,上述建设也考虑到波兰第一座核电站的建设,这一建设已经非常广泛和实施。本文在介绍核电站技术体系的同时,介绍了AP1000反应堆的模型。除其他外,上述模型允许研究燃料组件位置对有效中子增殖因子/反应性的影响。此外,研究了慢化剂与中子能量之间的关系(中子通量密度作为能量的函数确定),并给出了正常运行时反应堆堆芯产生的裂变生成量。为了验证所建立的模型,对所得结果进行了分析,并参考了文献数据。
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引用次数: 2
Analysis of the impact of temperature load on the state of stress in a bolted flange connection 温度载荷对螺栓法兰连接应力状态的影响分析
Pub Date : 2018-05-09 DOI: 10.1109/IIPHDW.2018.8388333
Patryk Towarnicki, R. Grzejda
Modelling and calculations of a bolted flange connection located under elevated temperature conditions are presented. Analysis of forces acting on the bolt and the joined elements on the basis of analytical formulas and using the finite element method (FEM) is performed. In the case of theoretical calculations the recommendations given in books on the fundamentals of machine design are applied. For a case of numerical calculations a simplified model of the bolt is used. The obtained results of calculations are checked in terms of fulfilment of the adopted strength criterion associated with acceptable thermal stress in the bolt. Selected results of simulation studies of the connection FEM-model in the form of temperature distribution in the model are shown. On the basis of the comparison of the theoretical and numerical analyses results, the usefulness of the simplified bolt model for calculations of forces in the bolts in flange connections under elevated temperature conditions is determined.
对高温条件下的螺栓法兰连接进行了建模和计算。在解析公式的基础上,采用有限元法对作用在螺栓和连接单元上的力进行了分析。在理论计算的情况下,在机器设计基础书上给出的建议被应用。为了进行数值计算,采用了简化的锚杆模型。对计算结果进行了校核,以满足所采用的与螺栓可接受热应力相关的强度准则。以模型内温度分布的形式给出了连接有限元模型仿真研究的选择结果。通过理论分析结果与数值分析结果的比较,确定了简化螺栓模型在高温工况下计算法兰连接螺栓受力的有效性。
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引用次数: 1
Fludeoxyglucose metabolism modeling: An overview 氟脱氧葡萄糖代谢模型:概述
Pub Date : 2018-05-09 DOI: 10.1109/IIPHDW.2018.8388232
D. Chalupa, J. Mikulka
Pharmacokinetic modeling of glucose provides the means to quantify local metabolic rate in various tissues. The 2-deoxy-2-(18F)fluoro-D-glucose (FDG) radiopharmaceutical allows researchers to use and optimize numerical models for this purpose in Positron Emission Tomography (PET) clinical studies. This work provides an insight into how the models were created and historically updated. It describes some of the models in detail and mentions their drawbacks and subsequent solutions. The invasivity of the early metabolic rate estimation methods is mentioned and numerical and graphical solutions are presented.
葡萄糖的药代动力学模型提供了量化不同组织中局部代谢率的手段。2-脱氧-2-(18F)氟-d -葡萄糖(FDG)放射性药物允许研究人员在正电子发射断层扫描(PET)临床研究中使用和优化为此目的的数值模型。这项工作提供了对模型是如何创建和历史更新的深入了解。它详细描述了一些模型,并提到了它们的缺点和后续解决方案。指出了早期代谢率估计方法的侵入性,并给出了数值解和图形解。
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引用次数: 0
Universal windows application for the parameters calculation of shields against ionizing radiation 电离辐射屏蔽参数计算的通用窗口应用程序
Pub Date : 2018-05-09 DOI: 10.1109/IIPHDW.2018.8388323
Patryk Szumielewicz, K. Cichoń, W. Chlewicki
Proper design of shields against ionizing radiation is a critical factor considering safety of the humans who are exposed to such radiation. In many cases, the design procedure of the shielding is well defined by the government authorities. However, up to now in Poland there was no software dedicated to such design. This study addresses people who work to prepare the design specifications for shielding in medical sites, which comply with the polish standards. In these work we would like to present a software (based on Universal Windows Platform) tool supporting automatic computation of the shield parameters.
考虑到暴露在这种辐射下的人类的安全,适当设计防电离辐射的防护罩是一个关键因素。在许多情况下,屏蔽的设计程序是由政府当局很好地定义的。然而,到目前为止,波兰还没有专门用于这种设计的软件。本研究针对从事医疗场所屏蔽设计规范编制工作的人员,这些设计规范符合波兰标准。在这些工作中,我们想提出一个软件(基于通用Windows平台)工具,支持自动计算盾构参数。
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引用次数: 1
A model of water thermal-hydraulics during depressurization of a vessel filled with water under saturation conditions 饱和条件下装满水的容器减压过程中的水热工力学模型
Pub Date : 2018-05-09 DOI: 10.1109/IIPHDW.2018.8388234
Rafał Bryk, H. Schmidt, T. Mull, O. Herbst, I. Ganzmann
This paper discusses results obtained during the simulation of water dynamics and heat transfer during sudden depressurization of a vessel filled with water under the saturation conditions. Validated prediction of the thermal-hydraulics during the depressurization is important by virtue of wide implementation of pressurized vessels in chemical and power engineering. Particular emphasis was put on the implementation of the vessel in the field of steam storage and as the reactor pressure vessel of the boiling water reactor design. In both cases, the vessel is filled up to a certain level with saturated liquid water. The rest of the vessel is occupied by saturated steam. In case of the pressure decrease e.g. due to discharging of the steam from the vessel or due to the loss of coolant accident in a nuclear power plant, the liquid water evaporates abruptly, being a reason, thereby, of strong transients in the vessel. These transients and the sudden emergence of void in the region occupied at the beginning by liquid, cause elevation of the two-phase mixture. Prediction of this elevation — called the water level swell — is important from the view point of safe operation of the device. In this work, a model calculating liquid water collapse level and two-phase level swell is presented and validated against experimental data. The comparison of the model with the reference shows a good agreement.
本文讨论了饱和条件下装满水的容器突然降压过程中水动力学和传热的模拟结果。由于压力容器在化工和动力工程中的广泛应用,对减压过程中的热工水力学进行有效的预测是非常重要的。重点介绍了该容器在蒸汽储存领域的应用以及作为沸水堆压力容器的设计。在这两种情况下,容器都被饱和液态水填满到一定的高度。容器的其余部分被饱和蒸汽占据。在压力下降的情况下,例如由于蒸汽从容器中排出或由于核电厂冷却剂的损失事故,液态水突然蒸发,因此是容器中强烈瞬态的原因。这些瞬态和开始时被液体占据的区域突然出现的空隙导致两相混合物的升高。从设备安全运行的角度来看,预测这种高度(称为水位膨胀)是很重要的。本文提出了一个计算液态水坍塌水位和两相水位膨胀的模型,并通过实验数据进行了验证。模型与参考文献的比较表明,两者吻合较好。
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引用次数: 1
The influence of core geometry on no-load losses of medium power transformers 铁芯几何形状对中功率变压器空载损耗的影响
Pub Date : 2018-05-09 DOI: 10.1109/IIPHDW.2018.8388339
J. Wojtkun, B. Bródka, D. Stachowiak
The paper deals with the analysis of power transformer's no-load losses according to its geometry. The object of the study was a series of medium power transformers (6.3–40 MVA) produced for the Polish Electric Power System. Those transformers were installed in 110 kV's grid. The main customers are the energy distribution companies such as PGE, Enea, Energa and Tauron. Due to the high requirements of those companies, the no-load losses are a significant issue. The no-load losses have been calculated and measured. The calculation was carried out using the own algorithm. The following types of measured losses are considered: losses from the final test of the entire transformer and losses from the test of the core before the complete transformer assembling. The tests of only the core were executed by two independent laboratories: the producer of the core and the producer of the transformer. The tests were conducted according to the norm PN-EN 60076-1:2011. The calculations and measurements' results are in close agreement. Moreover, the relation between the percentage of corners and additional losses was observed. The knowledge about this dependency may be effective to design transformers with reduced losses.
本文从电力变压器的几何特性出发,对其空载损耗进行了分析。研究对象为波兰电力系统生产的一系列中功率变压器(6.3-40 MVA)。这些变压器安装在110千伏的电网中。主要客户是能源分销公司,如PGE, Enea, Energa和Tauron。由于这些公司的高要求,空载损耗是一个重要的问题。对空载损耗进行了计算和测量。用自己的算法进行了计算。考虑以下类型的测量损耗:整个变压器的最终测试损耗和变压器组装前铁芯的测试损耗。只有铁心的测试由两个独立的实验室进行:铁心的生产商和变压器的生产商。试验按照标准PN-EN 60076-1:2011进行。计算结果与测量结果非常吻合。此外,还观察了弯角百分比与附加损失之间的关系。了解这种依赖关系可以有效地设计具有低损耗的变压器。
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引用次数: 5
Advanced tomographic platform for real-time image reconstruction and biomedical signal analysis 先进的断层成像平台,用于实时图像重建和生物医学信号分析
Pub Date : 2018-05-09 DOI: 10.1109/IIPHDW.2018.8388354
T. Rymarczyk, A. Véjar, Paweł Nita, P. Tchorzewski
In this article we describe the system modeling of an advanced electrical tomography platform for biomedical use. The tomographic data acquisition needs to be as fast as reliable to incorporate tomographic inversion algorithms with almost real-time update. To provide high-level application programming interfaces using standard communication protocols and execute user-level programs, the solution incorporates a system on chip with hardware microcontroller and FPGA. The system consists on a mobile device that allows simultaneous recording of the heart electrical potential activity and lung ventilation imaging. The platform is composed by a data acquisition device and an aggregation and processing engine, in order to generate useful information for diagnostic or for prime monitoring of physiological changes in the body.
在本文中,我们描述了用于生物医学用途的先进电断层扫描平台的系统建模。层析成像数据采集需要快速可靠,以结合几乎实时更新的层析成像反演算法。为了提供使用标准通信协议的高级应用程序编程接口并执行用户级程序,该解决方案采用了带有硬件微控制器和FPGA的片上系统。该系统由一个移动设备组成,可以同时记录心脏电位活动和肺通气成像。该平台由一个数据采集设备和一个聚合和处理引擎组成,以便为诊断或对身体生理变化的初步监测生成有用的信息。
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引用次数: 6
Combining images captured from a multispectral camera 结合多光谱相机拍摄的图像
Pub Date : 2018-05-09 DOI: 10.1109/IIPHDW.2018.8388327
P. Marcon, J. Janousek, A. Sirucková
This article discusses multispectral imaging that is based on capturing image data at specific wavelengths across the electromagnetic spectrum. Panchromatic images were captured by a RedEdge camera. This camera features global shutters for distortion-free images, including narrowband red, green, and blue bands for RGB color images that when processed are aligned to all visible and non-visible bands and vegetation indices. Captured images were processed with the Matlab program. Combined images weighted by the vegetation index were created as well as RGB combined images. The obtained RGB image was compared with the RGB image captured by a regular camera.
本文讨论的多光谱成像是基于捕获图像数据在特定波长的电磁频谱。全色图像由reddge相机拍摄。该相机具有用于无失真图像的全局快门,包括用于RGB彩色图像的窄带红、绿和蓝带,这些图像在处理时与所有可见和不可见带以及植被指数对齐。用Matlab程序对采集的图像进行处理。创建植被指数加权组合图像和RGB组合图像。将得到的RGB图像与普通相机拍摄的RGB图像进行比较。
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引用次数: 1
Influence of measurement conditions on the Magnetic Barkhausen Noise properties 测量条件对磁巴克豪森噪声特性的影响
Pub Date : 2018-05-09 DOI: 10.1109/IIPHDW.2018.8388383
G. Psuj, Michal Maciusowicz, P. Chudzik
The properties of the Magnetic Barkhausen Noise (MBN) utilized for non-destructive examination of ferromagnetic materials are strongly affected by the measuring conditions. Therefore many aspects must be analysed prior adjusting of the testing such as frequency, magnetisation current value, waveform shape, configuration of excitation coil and detection coil, air gap between the magnetisation unit and testing sample, MBN frequency range or sampling frequency range. These all parameters are closely linked to MBN features quality and have strong influence on the final efficiency of the system. Therefore in this paper an evaluation of influence of measurement conditions on systems performance was carried out. The results were given and discussed.
用于铁磁材料无损检测的磁巴克豪森噪声(MBN)的性能受测量条件的影响很大。因此,在测试调整之前,必须分析许多方面,如频率、磁化电流值、波形形状、励磁线圈和检测线圈的配置、磁化单元与测试样品之间的气隙、MBN频率范围或采样频率范围。这些参数都与MBN的特征质量密切相关,对系统的最终效率有很大影响。因此,本文对测量条件对系统性能的影响进行了评价。给出了实验结果并进行了讨论。
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引用次数: 4
Precision landing options in unmanned aerial vehicles 无人机的精确着陆选项
Pub Date : 2018-05-09 DOI: 10.1109/IIPHDW.2018.8388325
J. Janousek, P. Marcon
This paper presents a precision landing system for unmanned aerial vehicles (UAVs). When designing the solution, we paid special attention to the required accuracy of the various sensors. The system comprises a highly accurate flight controller and a visual sensor for object detection. The platform is constructed to integrate into various types of unmanned aerial vehicles. The method for the visual tracking of the landing platform via an optical camera enables us to increase the landing reliability. The precise position of the unmanned aerial vehicle at landing is provided by an image analysis where the specially designed landing platform is detected. All calculations for precision landing guidance are performed directly on board. An infrared (IR) camera is used as the main sensor for monitoring the IR light beam. This aircraft guidance technique does not necessitate data transfer to and from the landing station. The proposed system can be a suitable solution to replace more complex and expensive systems, such as RTK GPS (Real-Time Kinematic Global Positioning System). A hexacopter drone was used for the test flights, and the results obtained were then subjected to comparison. The navigation to the location was first tested by a GPS sensor only; subsequent tests flights, however, already relied on a visual sensor. All of the precision landing options eventually yielded the required quality.
介绍了一种用于无人机的精确着陆系统。在设计方案时,我们特别注意了各种传感器所需的精度。该系统包括一个高精度飞行控制器和一个用于目标检测的视觉传感器。该平台是为集成各类无人机而构建的。利用光学摄像机对着陆平台进行视觉跟踪,提高了着陆的可靠性。在检测特殊设计的着陆平台时,通过图像分析提供无人机在着陆时的精确位置。所有精确着陆制导的计算都直接在舰上进行。红外摄像机是监测红外光束的主要传感器。这种飞机制导技术不需要在着陆站之间进行数据传输。所提出的系统可以替代更复杂和昂贵的系统,如RTK GPS(实时运动全球定位系统)。使用一架六旋翼无人机进行试飞,然后对获得的结果进行比较。首先,仅通过GPS传感器对导航位置进行了测试;然而,随后的测试飞行已经依赖于视觉传感器。所有的精确着陆方案最终都达到了要求的质量。
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引用次数: 20
期刊
2018 International Interdisciplinary PhD Workshop (IIPhDW)
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