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.
Maintenance work of power equipment plays an important role in ensuring the security and reliable operation of power system and promoting the economic efficiency of enterprises. This paper takes the actual operating status of in-service equipment into account, calculates the current failure rate based on health index to improve the equipment reliability assessment. The fuzzy age reduction based failure...
Based on the optimal allocation of reactive power load between a 220kV power plant and power systems to minimize the active power loss, this paper shows some key factors affecting the optimal reactive power of power plant. An evaluation index is proposed to reflect the relationship between the voltage magnitude of power plant and the reactive power flow of the system, i.e., the voltage difference...
Large scale image understanding is drawing more and more attention from the researchers and industry. Inspired by the game theory and machine learning algorithm, this paper proposes a semantic dictionary to solve the key problem of visual polysemia and concept polymorphism in the large scale image understanding. The semantic dictionary characterizes the probability distribution between visual appearances...
This paper analyses the back pressure match and optimization using a regulated back-pressure valve (BPV) for the cathode outlet flow in a high pressure PEMFC engine. At a given power, the cathode input and output flow rate determine the cathode pressure, and consequently determine the compressor power consumption. In order to maintain a high efficiency during operation, the BPV has to be adjusted...
At present, as the design of mechatronic products is becoming increasingly complex, the empirical separate or step-by-step design methods are faced with great challenges because numerous factors and processes during design have become inevitably coupled. This coupled design deeply involves the sophisticated management of massive information or big data, as well as the efficient operation of information...
Despite of the rapid development of computer science and information technology, human-machine integrated design of complex mechatronic products is still not fully accomplished, partly because of the inharmonious communication among collaborators. Therefore, one challenge in human-machine integration is how to establish an appropriate knowledge management (KM) model to support integration and sharing...
A novel planar slot array antenna with omnidirectional radiation pattern in the horizontal plane is proposed. The antenna has a simple structure based on a stripline. Its fabrication employs a low-cost and accurate planar printed technique. A series of rectangular-shaped loop slots are etched on two parallel ground planes, and act as radiators. The basic principle of operation of the antenna is discussed...
To realize the coordination between controlling the environmental risk caused by railway dangerous goods station (RDGS) and improving the efficiency of the whole dangerous goods transportation system, a bi-level programming model for optimizing the distribution of existing RDGSs is constructed concentrating on such two sub-problems as adjusting the location of existing RDGSs and adjusting their business...
A novel printed slot array antenna with omnidirectional radiation pattern in the horizontal plane is proposed. It uses rectangular shaped loop slots as the radiators, which are etched on two parallel ground planes of a 50Ω stripline. A proposed antenna with 8 back-to-back radiators is optimized making used of the parallel Genetic Algorithm (GA) on a cluster system. A prototype antenna was fabricated...
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.