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.
A tri-frequency relativistic backward wave oscillator (RBWO) with resonant reflector has been designed and analyzed in the paper. The simulation results show that the three frequency microwave output (7.6GHz, 8.4GHz and 9.2 GHz) with the device can be produced synchronously.
This paper designed a high efficiency W-band extended interaction oscillator. The rectangle coupled-cavity slow-wave line along with the sheet beam can increase the impedance of the circuit and has the merit of high power operation. Through PIC simulation the optimized parameters has been achieved with the beam-wave interaction efficiency over 27%.
An 11th-harmonic slotted peniotron has been designed for reducing the external magnetic field and maintaining relatively high efficiency. Small-signal theory is used to get the start-oscillation conditions for an axis-encircling electron beam. The device employs a 30-kV 1-A axis-encircling beam to interact with the modes of a slotted 11-vane circuit. As an oscillator, the 11th-harmonic slotted...
For addressing the problem the society has higher and higher demands of government constitution and management of mid-and-long term macro-planning. The five-year planning MIS research on medium-small city based on GIS are established based on Visual Basic6.0 and components of GIS software-MapX, making the management of general planning realize digitization, data indicator become standardization, results...
Digital globe is a visual system based on geographical coordinate, provided with multi-resolution, mass data and multi-dimensional display. Three-dimensional terrain visualization is an important composition of researches about terrain visualization technology and digital globe, also is the foundation of realizing the multi-angle, multi-layer, real-time generation, display analysis and roam of three-dimensional...
Hand gesture contour detection is the key technology of gesture recognition based on computer vision. In this paper, the GVF Snake model and the skin color elliptical model is proposed to extract the contour of the static hand gesture. The skin color elliptical model is used to calculate the field of the hand and the initial contour. Hand gesture contour is detected by the GVF Snake model based on...
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.