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31. A novel portable system for optical fiber attenuation spectrum measurement with accousto-optical tunable filter(AOTF)technique is presented.

32. The influence and influence mechanism of heat aging on the attenuation of PMMA polymer optical fiber (POF) were studied.

33. Results:The tumors showed as a thickness or bulky mass of the local supraglottic structure with irregular margin, homogeneous attenuation and slight enhancement.

34. In benign tumors, smooth edges and lateral echo attenuation were demonstrated, and they were of poor blood flow signals.sentencedict .com

35. X1 probe : no attenuation, input impedance follow that of scope input impedance (usually 1 Mohm). This type of probe is seldom used because of heavy loading effect on circuit under test.

36. On the basis of a model, the relationship between the attenuation coefficient and the propagation distance can he deduced by solving a differential equation.

37. Two sharp attenuation poles can be located close to either side of the desired pass-band to improve the frequency selectivity.

38. Low-frequency pseudo Rayleigh wave (high velocity)can be used to estimate shear wave attenuation, then permeability in original state formation.

39. In modern shortwave communication systems, the channels are mostly frequency-selective, multipath transmission causes the coherent attenuation and symbol interference.

40. The result showed that the attenuation of residual stress of autofrettaged thick-walled cylinder reached about 30% under cycle loading.

41. Attenuation of seismic waves between such surfaces can be similarly diagnostic.

42. L. F. noise can be better attenuated so as to obtain good attenuation characteristics over the entire audible frequency range by using active noise reduction technique in the closed-air type earmuff.

43. If a proper non- linear change of the instantaneous frequency is realized, we can get a frequency spectrum whose input is the mean of the reciprocals of bed attenuation coefficients.

44. Pseudo-Rayleigh wave at low frequency (high velocity)can be used for the computation of shear wave attenuation in virgin zone.

45. In the paper, the dependability of explode energy of blasting fuse through space attenuation ignite the high energy ignition compositions was learned.

46. I manufactured the distribution of the tenth Five-Year Plan Strong motion networks including the fixed stations, intensity array, active faults array, the structure array, attenuation array.

47. The process of attenuation measurement is presented, which utilizes a system consisted of a sweep oscillator, a pair of broad-banded horns, and a scalar network analyzer, etc.

48. The hydrogen absorbing filling compound can be used to reduce the fiber attenuation caused by hydrogen and protect the optical fiber cable.

49. However, no report is available about the effects of tree parameters on noise attenuation of expressway.

50. We propose a continuously adjustable, large attenuation factor laser energy attenuator.

51. The attenuation of water window soft X rays through a silicon nitride film, air and water contained in samples was calculated using the experimental data.

52. It is found that the star_shaped nozzle jet has a shorter initial section and slower velocity attenuation along the jet centerline in the main region than the round nozzle jet.

53. In the optical fiber transmitting system, attenuation of fiber affects transmitting efficiency directly, the lower attenuation is very important because it affects the sensitivity frequently.

54. Methods; To study the relationship between signal attenuation and temperature or time by the theory of diffusion movements on classical physics.

55. Propagation characteristic of UHF radio wave in rectangle , circle and arched tunnels is studied in this paper and the computing equation for attenuation constant is deduced.

56. Without attenuation isolation in source terminal, the negative error due to source terminal impedance mismatch may be corrected.

57. The rocket exhaust plume causes the effects of noise, smoke, flame and heat radiation, environment pollution and signal attenuation, etc. So it is important to study exhaust plume.

58. Along with the thermal instability, unevenness , vendors and the oviductus adhesive thermal energy attenuation.

59. Ultrasonic transmission attenuation characteristic in muscular tissue is discussed in this paper.

60. Due to the effect of the air layer in the composite material, the swing attenuation and phase delay of transition wave and the solutions were discussed.