单词 | Chirp |
例句 | 1. The sparrows chirp outside the window every morning. 2. Swallows fly around inside and chirp. 3. The special feature of chirp radar is that it does not have a fixed carrier frequency during each shriek. 4. Or how about the faint chirp prodding you to invent an ugly doll with a hankering for tickles? 5. The birds chirp merrily at the top of tree. 6. Play chirp the time of played chirp in ms. 7. Birds had begun to chirp among the trees. 8. Chirp signal is a kind of pulse-compressed signal with large time-bandwidth products achieved through linear frequency modulation. It has high resolution in range because of its great bandwidth. 9. A parameter estimation algorithm of chirp signal which makes use of the position and magnitude of non zero cyclic spectral peaks to estimate the three parameters is presented. 10. The ambiguity function of intra-pulse chirp and inter-pulse stepped frequency signal is analyzed and obtained according to new type radar. Firstly, the expression of the signal is given. 11. A cricket an inch long has a chirp that is audible for nearly a mile. 12. And the adjustable or negative chirp parameter can decrease bit error rate of transmission system through reducing dispersion penalty. 13. Finch had regular flying, and closed to chirp to a person. 14. Chirp up the chirp is played from start frequency to the end frequency. 15. It begins quietly; like the chirp of a track signalling the distant approach of a train. 16. This method is not limited to Chirp signal, but also applicable to other types of signals. 17. The Japanese sound effect for a chirp or peep, made by small birds or rodents. 18. Constabulary bate, blow alarm chirp comes check, captain is obliged to halt the car. 19. Kelpie looked at.her with his bright beady eyes, and then suddenly began to chirp. 20. When they dropped to the ground, the robin, sensing his intrusion, blessed them with a chirp and flew away. 21. She gives a brief, cut-off little cry like a chirp as she comes, and sinks her teeth into my shoulder. 22. Deep in the woods there are mixed flocks of chickadees and kinglets, and they chirp incessantly though unobtrusively. 23. Here on basic up bring forth having pertinency steer down chirp measure, keeping motorcycle ride speeding up noise marked reduce. 24. They are basically quiet cats in voice, however they do trill, chirp and click when delighted. 25. As one reaches into a nest, so my hand reached for the wealth of the nations; as men gather abandoned eggs, so I gathered all the countries; not one flapped a wing, or opened its mouth to chirp. 26. The results also show unequal amplitude method can reduce the interaction between femtosecond soliton in the presence of optical source chirp in a certain degree. 27. The numerical simulation indicates that, larger biasing current and smaller detuning expand the dynamic range of conversion efficiency and extinction ratio, but worsen the frequency chirp. 28. In ideal circumstances, the back scattered echo signal of SAR is chirp signal. With synthetic aperture theory, high azimuth resolution imaging to distant targets can be attained. 29. The transversal intensity distribution remains nearly unchanged with increasing chirp parameter for relatively large values of the pulse duration. 30. Now it is clearing up, and a sparrow is beginning to chirp. 1. The sparrows chirp outside the window every morning. 31. Evolution of chirp is simulated by computer and chirp as a function of the fiber loss and group velocity mismatch is analysed. 32. Birds had begun to chirp and twitter among the trees. 33. The results show that, at the initial distance and the initial time the chirp has no influence on the spatial intensity distributions, but it affects the pulse front edge or back edge. 34. Chirp signal is a kind of pulse - compressed signal with large time - bandwidth products achieved through linear modulation. 35. A tunable GaAlAs diode laser is used as a chirp signal source, the distance is detected by calculating the beat frequency. 36. However the longer chirp time the more calculations is needed and this slow down the computer. 37. Experiment on acoustic pyrometry is done using the chirp signal, white noise and sine wave respectively in a 300MW boiler in one domestic power plant, through fire hole on furnace wall. 38. In addition and loves Li the colleague pair of funny guy didelphis lanigera Brother, the individuality is bright, chirp grasps. 39. This paper analyses the problem of the quadratic phase for multiple frequency ranging based on chirp signal, and the method of the phase elimination is proposed. 40. But I did not chirp. I only wanted to see. 41. High range resolution needs wide-band signals. Most reported research into wideband signal adopts stepped chirp using single transmitter. 42. Based on the remainder theorem and direct dechirp operation, an algorithm for estimation of chirp rate and initial frequency of the subsampling wideband LFM signal unambiguously is presented. 43. This approach can also extend the transmission distance by reducing the transient chirp. 44. Nowadays, the ave of the capital is off-street, restaurant inn is numberless as the sand, those who write car filling shoe is one chirp of one battalion of 3 paces, 5 paces more. 45. The frequency-stepped chirp signal is very common in ISAR imaging because of its peculiar characters. 46. This paper introduces an algorithm used in estimation of the phase error of chirp signal. 47. An processing method of chirp signal is proposed. Using this method, the moving targets can be detected and the multiple moving targets can be distinguished form the strong ground-clutter effectively. 48. This month Boyun the chirp sends out diphthong, this time we duplicate him "the chirp" to make the response, and " converses " with lip shape must obviously and her. 49. You couldn't see a thread of green or hear a single chirp of insect or bird. 50. Fiber frequency response method to measure chirp parameter of intensity modulator is described. 51. The results show that the bigger chirp influence on the stable propagation of optical soliton, is destractive and even more destractive on exceed high-stepping optical soliton having less pulse width. 52. Only male cicadas chirp in late summer, and early autumn. 53. A new method in using Charge Coupled Devices for signal processing of chirp Z-transform is described. 54. Time-varying parameters of the ARMA model in this paper processes chirp signal, it avoid computation of sinusoidal function in chirp signal generation and phase truncation. 55. SAR point target echo simulator which based on DDS chirp signal generator is introduced; it is composed of ARM controller unit and LFM signal generator unit. 56. The impacts that initial chirp affects the polarization mode dispersion in wavelength division multiplex system are simulated and analyzed. 57. Due to the lasing effect, the peak modulation frequency of extinction ratio and chirp occur at the relaxation oscillation frequency. 58. The influence of optical source chirp on femtosecond soliton interaction is studied numerically, and the unequal amplitude method can reduce the interaction. 59. Compared to the theory signal, the chirp produced by DDS under large bandwidth, may have frequency distortion due to the limited chirp-rate. 60. The effect of initial chirp on the quality of the soliton-effect picosecond pulse compression in loss and no-loss fibers is studied by simulating the process of compression in conventional fibers. 61. Finally , a new cascaded detection method is put forward for detecting the chirp signal using radar. 62. For the problem of the parameter estimation of multi-component chirp signal in the additive colored noise, a method based on phase difference and time-frequency signal filter was proposed. 63. It was an intuitionist method for judge whether have a chirp in laser pulse. 64. The simulations show that when the grating grooves are unparallel, the original chirp leads to the pulse width smaller only considering GDD. 65. An analytic expression of the self-phase modulation induced by chirp in non-Kerr-like optical fibers with saturable nonlinearity is derived taking into account the fiber loss. 65. try its best to gather and make good sentences. 66. When a prairie dog senses danger it begins to chirp and retreat to its burrow. 67. The proposed changeable sampling ratio processing technology (CSPT) is an effective technique to detect the ratio of modulation of chirp signal. 68. ISAR based on frequency-stepped chirp signal has greater capability of anti-jamming than that of the conventional radar due to its peculiar characteristic. 69. Stretch processing is used to demodulate and remodulate the wideband chirp signal, which can reduce the system IF bandwidth, and reduce the complicated degree of the system remarkably. 70. This paper gives a detailed account of the waveform, matched-filter, fuzzy function, resolution in speed, resolution in range and the capacity of anti-interference of the Chirp signal. |
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