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.
Based on the single wheel vehicle model, a sliding mode variable structure control strategy with fractional exponential reaching law is proposed for the ABS control system. In this paper, the integral sliding mode surface is used to design the switching function, and the fractional exponential reaching law is designed by using the definition and properties of fractional exponential differential equations...
This paper presents numerical studies on thermal performance of LED filament light bulbs with different bulb sizes, phosphor diameters, and phosphor shapes. A quarter of numerical model of LED filament light bulbs was built to analyze the temperature field, velocity field and distributions for convective heat flux coefficient on the filament surface. The effects of bulb sizes, phosphor diameters and...
This research aims to represent the ZigBee mesh routing and the performance under simulation environment for smart home. In the realistic smart home, researcher does not get some of the analysis and results. Hence, we designed and developed ZigBee best virtual smart home environment on Qualnet simulator. Finally, we suggest mixed-mode simulation methodology that integrates the smart home environment...
Nowadays, even though countries take measures to control the population, it is reported that the total number of global population has reached 7billion. In 21st century, the human society is still faced with the problems about the unprecedented consumption of material wealth and the unprecedented increase in population [1]. So the researchers should study the dynamic changes of resources and population...
This paper proposes a novel three-phase ac-ac converter topology based on Z-source concept. It could provide buck-boost function and make the role of frequency changer. Compared with the traditional ac-dc-ac converter, it uses fewer devices and realizes direct ac-ac power conversion, so as to have higher efficiency and better circuit characteristics. Compared with the traditional matrix converter,...
The characteristic of harmonic currents of high speed train is significantly different from DC-drived locomotives. The rectifier of CRH5 electric multiple units (EMUs) in China is researched in this paper.The principle of four-quadrant converter and its predictive current control strategy are studied. The formula of fundamental and harmonic currents of the parallel two-level four-quadrant converter...
Current frequency allocation scheme results in poor spectrum utility. In some frequency bands, the spectrum may not be fully utilized either on geographical or at temporal level. In addition, on some hot spot business frequency bands, spectrum resources become in short supply. Many papers discuss the new spectrum management policies, and the focus is dynamic spectrum access (DSA) technology based...
Under static frequency allotment scheme, each licensed operator is allocated a frequency band in which its user can transmit, but the spectrum may not be fully utilized either on geographical or at temporal level. On the other hand, on some hot spot business frequency bands, spectrum resources become in short supply. Dynamic spectrum access (DSA) technology based on cognitive radio is an effective...
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.