travelling wave वाक्य
उदाहरण वाक्य
मोबाइल
- In the late 1950s he and colleagues constructed ruby travelling wave masers, cooled to 4.2K by liquid helium, which were then the world's lowest-noise microwave amplifiers.
- However, the system demonstrated very low reliability in the transmitter's travelling wave tube ( TWT ) amplifiers, which led to an extremely expensive re-design and re-installation.
- For Configuration 3 units, the Patriot radar was completely redesigned, adding another travelling wave tube ( TWT ) that increased the radar's search, detection, tracking, and discrimination abilities.
- Pertinently to the topic of this volume, it is suggested that the brain is an excitable medium, and that cognition and possibly consciousness correlate with the spatiotemporal pattern of travelling waves in the brain.
- :" Destructive interference " when travelling waves interact means that the net deviation ( which may be brightness, electric potential or sound, depending on the type of wave ) is zero at that point.
- The solutions of reaction diffusion equations display a wide range of behaviours, including the formation of travelling waves and wave-like phenomena as well as other patterns like stripes, hexagons or more intricate structure like dissipative solitons.
- Very large vertical wire excursion ( over 30 cm, or 1 foot ) had been observed in the 1981 tests, and were blamed on the pantograph catching up with the travelling wave it set up in the contact wire.
- In his 1937 paper " The wave of advance of advantageous genes " he proposed Fisher's equation in the context of population dynamics to describe the spatial spread of an advantageous allele and explored its travelling wave solutions.
- However, the narrower pores required to give good thermal contact in a travelling wave regenerator, as compared to a standing wave stack which requires deliberately imperfect thermal contact, also gives rise to greater frictional losses, reducing the efficiency of a practical engine.
- Key developments in the post-war period include the travelling wave tube as a way to produce large quantities of coherent microwaves, the development of signal delay systems that led to phased array radars, and ever-increasing frequencies that allow higher resolutions.
- Davia ( 2005 ) outlines such a theory based on autocatalytic reactions, which are fundamental metabolic processes & Davia ( 2005 ) equates enzymes with self-perpetuating structures called travelling waves & ( and ) argues that the nervous system functions as an excitable medium .
- J . C . Simon, B . LANDOUSIES, Y . BOSSIS, P . DOUSSIERE, B . FERNIER, * C . PADIOLEAU, " Gain, polarisation sensitivity and saturation power of 1.5 micron near travelling wave Semiconductor Laser Amplifier ", Electron.
- The design has almost double the radiation efficiency of the HF folded dipole of the same length and is nearly half the size of other traditional HF wire antennas such as the " Australian travelling wave dipole " The standard size Robinson Barnes antenna is only 27m in length.
- For the record, in the classical case, a ring resonant travelling wave, for example in a circular transmission line, unless actively forced, will spontaneously decay into a ring resonant standing wave because reflections will build up over time at even the smallest imperfection or discontinuity.
- J . C . Simon, P . DOUSSIERE, P . LAMOULER, I . VALIENTE and F . RIOU, " Travelling wave semiconductor optical amplifier with reduced non-linear distortions ", Electronics Letters, vol . 30, n?1, 1994, pp . 49 50.
- Tidal waves can be either internal ( travelling waves ) with positive eigenvalues ( or equivalent depth ) which have finite vertical wavelengths and can transport wave energy upward, or external ( evanescent waves ) with negative eigenvalues and infinitely large vertical wavelengths meaning that their phases remain constant with altitude.
- Landau calculated the wave caused by an initial disturbance f _ 1 ( x, v, 0 ) = g ( v ) \ exp ( ikx ) and found by aid of Laplace transform and contour integration a damped travelling wave of the form \ exp [ ik ( x-v _ { ph } t )-\ gamma t ] with wave number k and damping decrement
- A "'passive electronically scanned array "'( PESA ), also known as "'passive phased array "', is a phased array antenna, that is an antenna in which the beam of radio waves can be electronically steered to point in different directions, in which all the antenna elements are connected to a single transmitter ( such as a magnetron, a klystron or a travelling wave tube ) and / or receiver unit for each antenna element, all controlled by a computer.
- In 1963, Pierce received the IEEE Edison Medal for " his pioneer work and leadership in satellite communications and for his stimulus and contributions to electron optics, travelling wave tube theory, and the control of noise in electron streams . " In 1975, he received the IEEE Medal of Honor for " his pioneering concrete proposals and the realization of satellite communication experiments, and for contributions in theory and design of traveling wave tubes and in electron beam optics essential to this success . " In 1985, he was one of the first two recipients of the Japan Prize " for outstanding achievement in the field of electronics and communications technologies ."
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