The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
The content formerly presented as the proceedings of this conference in IEEE Xplore was found to be unauthorized, and thus a wholly inaccurate representation of the proceedings of the conference.The content now presented as the proceedings of this conference has been verified as a true and accurate representation of the research presented at the conference. We apologize for this incident, and have...
This paper presents the design of a novel approach to Wall-Following using a single distance sensor. Our concept takes into account distance measurements and odometry information from the robot. This information is combined using a Kalman filter, to estimate the relative position of the robot to the wall. A tracking controller is used to steer the robot with constant forward velocity along the wall...
S500MC steel with a thickness of 6mm was welded using high power fiber laser-hybrid welding method, The microstructure and mechanical properties of the welding were studied. The results show that no defect welding can be achieved by single-face laser-arc hybrid welding at laser power of 3.0kW, welding speed of 1.0m/min, arc current of 270A and single-face laser welding with filling wire at laser power...
Conference proceedings front matter may contain various advertisements, welcome messages, committee or program information, and other miscellaneous conference information. This may in some cases also include the cover art, table of contents, copyright statements, title-page or half title-pages, blank pages, venue maps or other general information relating to the conference that was part of the original...
Power plant boilers need to be cleaned and inspected on a regular basis. Boiler chambers can be up to 50m high requiring scaffolding for all works on the water walls. The scaffolding itself can take several weeks. To overcome the disadvantage of the time consuming scaffolding work an automated boiler wall crawler for wall cleaning and inspection is being developed by Alstom in collaboration with Alstom...
The algorithms of on-line available transfer capability are expounded in this paper. Based on DC sensitivity method, an algorithm how to fast calculate branch outage distribution factor is presented. At the same time, the topology search and outage distribution factor method are utilized to calculate ATC considering N-l outage. Method of calculating ATC between areas is proposed according ATC calculation...
This paper introduces a climbing robot for corrosion monitoring of reinforced concrete structures such as cooling towers, dams or bridges. The robot combines a vortex adhesion mechanism with a wheel electrode sensor for potential mapping of the concrete surface. A detailed description of the system is presented first. A special effort was made during the design in order to develop a lightweight device...
A possible synthesis mechanism of magnetic nanoparticles nickel, prepared by chemical reduction with hydrazine hydrate in ethylene glycol was obtaind. On this basis, different modifiers were used to improve the surface condition of magnetic nanoparticals, resulting to the good dispersion and stability of magnetic nanoparticles and with being more easily outer coated. Then the shell material CdTe was...
In order to solve the problem of microgrid(MG) economic operation optimization, model is built respectively for Na/S battery(NA/S), micro turbine(MT), fuel cell(FC), wind driven generator(WT), photovoltaic cell(PV), and interactive power exchanged with main grid, which moves to an emphasis on cogeneration and unit commitment. Multiple objective function including fuel cost of micro-source, operation...
In the context of environment reconstruction for inspection, it is important to handle sensor noise properly to avoid distorted representations. A short survey of available sensors is realize to help their selection based on the payload capability of a robot. We then propose uncertainty models based on empirical results for three models of laser rangefinders: Hokuyo URG-04LX, UTM-30LX and the Sick...
Using the methods of fault types and the effect analysis identified all types of risk existing in mine ventilation system and its index system. Deciding the constant right value for each index through the method of combing the fuzzy interval method and the analytic hierarchy process method and achieving variable weight using the value change of hazards and in the end establish the mathematical model...
Inspection and maintenance tasks in the power industry often require tools to be moved smoothly in direct contact or close proximity over surfaces of curved tube-like structures. This paper addresses the problem of navigating robotic devices, namely a wheeled climbing robot carrying an inspection tool, on surfaces as they typically appear in steam chests of power plants. The surfaces are modeled by...
Taking the neutral earthing via arc extinguishingcoil electric network for example, the thesis emphatically analyses the start-up of leakage protection and basis of line selection, on the foundation of analysing its electrical characteristics. And this thesis presents the leakage protection program "Starting on zero-sequence current and break variable and selectively operating on the comparison...
The slope satiability analysis depends on its seepage simulation, and the rainfall is one of the most important factors which affect the seepage of soil slope. When the rainfall intensity is large, the runoff occurs and affects the seepage. There are two methods to simulate the slope seepage under rainfall condition. One is using seep and runoff coupled model, and another is using seep model which...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.