A novel method of text detection in radiographic images

2019 ◽  
Vol 61 (10) ◽  
pp. 591-596 ◽  
Author(s):  
Yasheng Chang ◽  
Jianmin Gao ◽  
Hongquan Jiang
Keyword(s):  
Nuclear Power ◽  
Rapid Development ◽  
Text Detection ◽  
Radiographic Images ◽  
Material Resources ◽  
Radiographic Testing ◽  
Significant Efficacy ◽  
Important Means ◽  
Novel Method ◽  
Frequency Domain Filtering

With the rapid development of industries such as nuclear power and shipbuilding, radiographic testing (RT) is widely used in these fields as an important means of weld inspection. It also produces a large number of radiographic films, which consume a great deal of manpower and material resources. It is therefore beneficial for the radiographic film to be digitised for storage and archiving. Text detection in RT weld images is an important prerequisite for the archiving of digitised films. This paper proposes a novel text detection method that employs mask convolution and frequency-domain filtering, which can detect text at different positions, with different fonts and of different sizes in RT weld images. The method is evaluated using 366 different images and shows significant efficacy for text detection in RT weld images, with the precision value reaching 96%. The method used in this paper is also compared with other methods that are commonly used in other fields and the results show that the proposed method gives improved results compared to state-of-the-art methods.

The PLC Research in the Program Control System of Thermal Power Coal Handling

2012 ◽  
Vol 548 ◽  
pp. 812-816
Author(s):  
Xiao Min Chen ◽  
Xi Yan Liu
Keyword(s):  
Power Plants ◽  
Rapid Development ◽  
Thermal Power ◽  
Chinese Economy ◽  
Power Requirement ◽  
Handling System ◽  
Human Power ◽  
Material Resources ◽  
Electricity System

With the rapid development of Chinese economy, the thermal power requirement is increasing not only in industry but also for the civil use in recent years. In China, the main fuel of thermal power is coal. Coal handling system places the consequence in the whole generate electricity system and has significant meaning to the power plant operation. The coal handling system of the thermal power plants has many types of equipment. The environment is vile with complicated control. If we control this system through manual mode, there will appear the imponderable questions. This article through the research of the coal handling system by the management of PLC can determine the long-term safe operation and reduce a mass of human power and material resources. It has the fundamental practical meaning and research value.

Microblog Sentiment Analysis Using User Similarity and Interaction-Based Social Relations

2020 ◽  
Vol 17 (3) ◽  
pp. 39-55
Author(s):  
Chuanmin Mi ◽  
Xiaoyan Ruan ◽  
Lin Xiao
Keyword(s):  
Sentiment Analysis ◽  
Social Relations ◽  
Rapid Development ◽  
Support Vector ◽  
Sina Weibo ◽  
User Similarity ◽  
Proposed Model ◽  
Novel Method ◽  
Polarity Classification ◽  
Similarity Information

With the rapid development of information technology, microblog sentiment analysis (MSA) has become a popular research topic extensively examined in the literature. Microblogging messages are usually short, unstructured, contain less information, creating a significant challenge for the application of traditional content-based methods. In this study, the authors propose a novel method, MSA-USSR, in which user similarity information and interaction-based social relations information are combined to build sentiment relationships between microblogging data. They make use of these microblog–microblog sentiment relations to train the sentiment polarity classification classifier. Two Sina-Weibo datasets were utilized to verify the proposed model. The experimental results show that the proposed method has a better sentiment classification accuracy and F1-score than the content-based support vector machine (SVM) method and the state-of-the-art supervised model known as SANT.

Discussion on the Utilization of Forestry Resource Data to Update Basic Geographic Information Data

2012 ◽  
Vol 472-475 ◽  
pp. 2988-2992
Author(s):  
Li Fang Lai ◽  
Yu Fen Zhang
Keyword(s):  
Survey Data ◽  
Rapid Development ◽  
Geographic Information ◽  
Land Survey ◽  
Novel Method ◽  
Resource Data

Along with the rapid development of economy, strong demand has been put on the application of basic geographic information data which needs timely updating. It has become a subject to be further investigated to make full use of other data (such as forestry resource data, land survey data, etc.) to effectively add new data when the basic geographic information data is updated and ensure the timeliness of basic geographic information data. This paper gives an instance to describe and discuss a novel method, whose purpose is to quickly update basic geographic information data by forestry resource data on MicroStation V8 platform.

Improving Public Acceptance to Nuclear Power: Policy, Practice and Experience With Public Communication

2017 ◽  
Author(s):  
Zhang Xiaofeng ◽  
Zhao Feng ◽  
Zhu Rongxu ◽  
Yang Zongzhen ◽  
Shangguan Zhihong
Keyword(s):  
Power Plant ◽  
Nuclear Power Plant ◽  
Nuclear Power ◽  
Public Awareness ◽  
Rapid Development ◽  
Clean Energy ◽  
Nuclear Industry ◽  
Public Acceptance ◽  
Public Communication ◽  
Administrative Authority

With the development of public awareness on environmental protection, especially after the Fukushima nuclear accident, the opposition to nuclear power due to NIMBY (not in my back yard) effect begins to hinder the rapid development of Chinese nuclear industry. For example, in recent years several large-scale mass incidents with appealing to stop the siting and construction of nuclear facilities in China have put related projects (including nuclear power plant and nuclear fuel cycle facility) into termination, resulting in certain financial loss and unnecessary social unstabilization, thus causing more and more concern from administrative authority, research institution and nuclear industry. To strengthen public acceptance on nuclear power, related enterprises such as CGN and CNNC have made great efforts in information disclosure to eliminate mysterious feelings towards nuclear power and expect to build new impression as clean energy. Domestic institutions and universities carry out plenty of work on methods to help public correctly perceive nuclear risk and present strategies for effective public communication. Administrative authority also issued detailed guidance on public communication required to be fulfilled during plant’s siting phase, which provided explicit provisions on the responsibility and job content of different entities. Here we will take one public communication practice of one nuclear power project located in south Zhejiang region as an example. In this scenario, we face more difficulty than other projects, such as doubt from local government, complexity of public types, and large amount of stakeholders. In this paper, we will make summary on endeavors to improve public acceptance, such as large amount of NPP visits, comprehensive scientific popularization, direct communication with stakeholders and integration development between local society and nuclear industry. And we will discuss the feasibility of innovative practice, combining several similar tasks needed in different subjects, such as environmental impact assessment and social stabilization assessment, to fulfill at once. To achieve this goal, we design specific questionnaire and use it to survey the opinion of more than 800 people in the fairly large region across different provinces, covering 30km radius area of site, which gains satisfactory results. By comparing outcomes of opinion surveys carried out before and after the practice, we will put forward to the considerable effect of public communication in improving public acceptance to nuclear power, and analysis the pros and cons of this example. Moreover, we also expect the good experience in practice can be promoted to overall processes of nuclear power plant, including siting, construction, commission and life extension, helping nuclear power gain more public acceptance.

Research on Oil Separator Control and Simulation

2012 ◽  
Vol 580 ◽  
pp. 365-368
Author(s):  
Xiao Li ◽  
Jin Hai Zhang
Keyword(s):  
Computer Simulation ◽  
Computer Technology ◽  
Rapid Development ◽  
Simulation Technology ◽  
Timing Control ◽  
Electronic Information ◽  
Typical Application ◽  
Training Assessment ◽  
Marine Oil ◽  
Important Means

With the rapid development of computer technology and electronic information technology is widely used, and application of computer simulation technology is increasingly popular. Engine room Simulator is a typical application of computer simulation technology in the field of maritime, has become an important means of training, assessment of the majority of the crew. Among them, marine oil separator system is an important part of marine Simulator. Simulation program for marine oil separator system timing control simulation for oil separator, and simulation for common failures.

COMPUTATION OF VESSELNESS IN CTA IMAGES FOR FAST AND INTERACTIVE VESSEL SEGMENTATION

2007 ◽  
Vol 07 (01) ◽  
pp. 159-176 ◽  
Author(s):  
WENLI CAI ◽  
GORDON J. HARRIS ◽  
HIROYUKI YOSHIDA
Keyword(s):  
Rapid Development ◽  
Computed Tomographic Angiography ◽  
Vessel Segmentation ◽  
Interactive Segmentation ◽  
Fast Marching ◽  
Computed Tomographic ◽  
Novel Method ◽  
Vascular Structures ◽  
Speed Function ◽  
Tomographic Angiography

With the rapid development of multi-detector computed tomography (MDCT) that results in improving the temporal and spatial resolution of patient data, clinical use of computed tomographic angiography (CTA) is increasing. Vessel segmentation can be challenging in CTA, but is needed for isolation of vascular structures. In this paper, a novel method for computation of vesselness in CTA images is presented, including a CTA transfer function prior to the vesselness computation for reducing the artifacts caused by the false-positive responses of a Hessian-based line filter, as well as a hierarchical structure, called MIP-volume pyramid, for accelerating the computation of vesselness. Using the computed vesselness, we present an interactive segmentation method for each individual vessel by applying a vesselness speed function in a fast marching level set method. Our new method was shown to provide an effective and efficient way that allows vesselness to be applied to large CTA images. This method has been implemented successfully in CTA vessel segmentation and evaluation.

Simulation of Triaxial Residual Stress Mapping for a Hollow Cylinder

2012 ◽  
Author(s):  
Mitchell D. Olson ◽  
Wilson Wong ◽  
Michael R. Hill
Keyword(s):  
Residual Stress ◽  
Stainless Steel ◽  
Nuclear Power ◽  
Complex Geometry ◽  
Cylindrical Body ◽  
Pressurized Water Reactor ◽  
Pressurized Water ◽  
Weld Residual Stress ◽  
Novel Method ◽  
Stress Mapping

This paper describes a novel method to determine a two-dimensional map of the triaxial residual stress on a radial-axial plane of interest in a hollow cylindrical body. With the description in hand, we present a simulation to validate the steps of the method. The simulation subject is a welded cylindrical nozzle typical of a nuclear power pressurized water reactor pressurizer; in the weld region, the nozzle inner diameter is roughly 132 mm (5.2 inch) and the wall thickness is roughly 35 mm (1.4 inch). The pressure vessel side of the nozzle is carbon steel (with a thin stainless steel lining), the piping side is austenitic stainless steel, and between the two are weld and buttering deposits of nickel alloy. Weld residual stresses in such nozzles have important effects on crack growth rates in fatigue and stress corrosion cracking, therefore measurements of weld residual stress can help provide inputs for managing aging reactor fleets. Nuclear power plant welds often have large and complex geometry, which has made residual stress measurements difficult, and this work provides a proof of concept for a new experimental technique for measurements on welded nozzles.

scholarly journals Implementation of a Performance Evaluation System for Nondestructive Testing Methods

2016 ◽  
Vol 2 (2) ◽  
pp. 44
Author(s):  
Daniel Algernon ◽  
Sascha Feistkorn ◽  
Michael Scherrer
Keyword(s):  
Nondestructive Testing ◽  
Evaluation System ◽  
Nuclear Power ◽  
Power Plants ◽  
Structural Integrity ◽  
Analysis Tool ◽  
Performance Evaluation System ◽  
Test Pieces ◽  
Inspection Systems ◽  
Important Means

<p>Nondestructive Testing (NDT) is an important means to ensure structural integrity and safe operation of components in many industries, as for example nuclear power plants, aerospace or civil engineering. Within the qualification of Nondestructive Testing personnel as well as validation of NDT procedures, practical demonstrations on test blocks with realistic flaws play a key role. Adequate test pieces need to be designed according to specific criteria such as quantity, shape, orientation, size and position of the test flaws, depending on the requirements of the national codes and standards in the specific industries. The performance of the candidates and inspection systems is quantified and analyzed with respect to criteria, such as detection, positioning, characterization as well as length and height sizing of flaws. Statistic measures are applied to express the resulting accuracy and overall performance. The indication reports obtained from different candidates contain ample information, which might not appear evident at first sight. The complexity of the situation requires an intelligent extraction of the information from the data. An analysis tool <em>IndEva</em> was developed to handle this complexity and provide an accurate, detailed and reliable evaluation of inspection systems and personnel. Besides the plain evaluation regarding the fulfilment of the qualification requirements, critical test flaws as well as test block sections, which are likely to cause false positive indications can be identified. Statistic results display the dependency of the system performance on various parameters and parameter combinations to provide a clear picture of the performance. Country-specific evaluation standards can be applied and compared, especially with regard to the continuous improvement of the qualification methodology.</p>

The simulation research on the natural circulation operation characteristic of FNPP in rolling and inclined condition

Kerntechnik ◽  
2021 ◽  
Vol 86 (1) ◽  
pp. 4-16
Author(s):  
R. Li ◽  
M. Peng ◽  
G. Xia ◽  
H. Li
Keyword(s):  
Nuclear Power ◽  
Natural Circulation ◽  
Rapid Development ◽  
Rolling Motion ◽  
Stable Operation ◽  
Circulation Flow ◽  
Operation Condition ◽  
Pressurized Water ◽  
The Core ◽  
Secondary Side

Abstract Recently, the FNPP (Floating Nuclear Power Plant) has got more and more attention and rapid development due to very wide prospect application on remote areas or islands. In general, the IPWR (Integral Pressurized Water Reactor) is adopted to meet the requirements of the limited space, the nuclear safety and the maneuverability in marine. The IPWR could depend on natural circulation operation to remove the residual heat of core under accident or low load operation condition. Because the driving head is low, the natural circulation flow is likely to be influenced by rolling and inclined condition. To clarify the natural circulation flow characteristics of the core in FNPP rolling motion and inclined condition, based on the modified THEATRe code by adding the ocean motion module and spatial coordinate convert module, the main thermal-hydraulic parameters variation in rolling and inclined condition were obtained. The effect of inclined angle, rolling amplitude and period on the natural circulation flow were discussed. The natural circulation flow in the core fluctuates periodically with rolling motion. And the inclination and rolling will also cause the degree of steam superheat of OTSG secondary side fluctuate, which could impact on the stable operation of secondary side system.

The Application of FPGA for Anticipated Transients Without Scram Mitigation System

2010 ◽  
Author(s):  
Mao-Sheng Tseng ◽  
Hui-Wen Huang ◽  
Ming-Huei Chen ◽  
Tsung-Chieh Cheng ◽  
Hsiang-Han Chung ◽  
...  
Keyword(s):  
Nuclear Power ◽  
Power Plants ◽  
Evaluation Method ◽  
Computer Code ◽  
Test Facility ◽  
Software Faults ◽  
Control Rod ◽  
Field Programmable ◽  
Important Means ◽  
And Control

The digitalized Instrumentation and Control (I&C) system of nuclear power plants (NPP) could provide operator easily Human-Machine Interface (HMI) and more powerful overall operation capability. However, some software errors may cause a kind of Common Cause Failure (CCF). As a consequence, the event of Anticipated Transients Without Scram (ATWS) will occur. In order to assure that the plant can be shutdown safely and to follow the requirements of 10CFR50.62, the utility builds up various ATWS mitigation features in NPP. The features include Fine Motion Control Rod Drive Run In, Alternate Rod Insertion, Standby Liquid Control System, Reactor Internal Pump Trip or Runback, Feedwater Flow Runback and Inhibition of Automatic Depressurization System. This research developed an evaluation method of diverse back-up means for computerized I&C system. A diverse backup of digital I&C system is the most important means to defend against CCF and un-detectable software faults. Institute of Nuclear Energy Research (INER) is developing a computerized I&C test facility, which is incorporated a commercial grade I&C systems with Personal Computer Transient Analyzer (PCTran)/Advanced Boiling Water Reactor (ABWR), a NPP simulation computer code. By taking the technology of Field Programmable Gate Array (FPGA) to implement the methods of ATWS mitigation, the research built up a diverse back-up of digital I&C system to expect to defend against CCF and undetectable software faults. According to the testing and evaluation, the work can be achieved the analysis of Diversity and Defense-in-Depth (D3).

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