| 1. | Channel band ranges
通道频带范围 |
| 2. | Receiving antennas for satellite broadcast transmissions in the 11 12 ghz band - part 1 : electrical measurements iec 61114 - 1 : 1999 ; german version en 61114 - 1 : 1999
11 12ghz频带范围内卫星广播传送用接收天线.第1部分 |
| 3. | Fixed radio systems - point - to - multipoint antennas - antennas for point - to - multipoint fixed radio systems in the 3 ghz to 11 ghz band v . 1 . 2 . 2
固定无线电系统.点对多点天线.在3 - 11ghz频带范围上运行的点对多点固定无线电系统用天线 |
| 4. | Wavelet transform is better than fourier transform in precision and credibility , and mra enables us to get the information about the frequency which we need
仿真结果表明多分辨率分解可以很容易得到我们需要的频带范围的信息，并且其快速小波算法也可以在dsp上实现。 |
| 5. | That results in good reconstructed images . so the ultrasonic transducers used to detect photoacoustic pressures should be designed and selected according to the frequency ranges of absorbers
针对大小不同的物体应该采用不同带宽探测器采集光声信号或者取宽带探测器的不同的频带范围进行重建。 |
| 6. | The honeycomb board impregnated absorbant can reach less reflection within wider frequency band and better mechanical performance and very little density . all these characteristics make it as an material to fabricate some parts of the aircraft
浸渍吸收剂的蜂窝板可以在宽频带范围内达到较小的反射、有很好的力学性能和很小的比重，这些特点成为制造飞行器吸波结构的最重要的材料。 |
| 7. | The frequency analysis results show conclusions as follows : 1 . the relative valid spectral power is declined with the volume percentage of inclusions in terms of exponent curve and the tendency of negative direction is same to that of forward direction
当ly12铝合金细小夹杂物(小于0 . 16mm )的体积百分数从0 0 . 35时，在35 50mhz的频带范围内，超声波形的有效谱功率按近似指数曲线快速下降，沿相反方向检测时其变换趋势相同。 |
| 8. | The harmonic factor raises with the growth of volume percentage of hardening particles no mater what detecting direction is . but it is not a linear variation course . the harmonic factor mounts up slowly under the critical value but increases rapidly while exceeds the critical value
在正、逆向检测时，随着强化粒子体积百分数的增加，在有效频带范围内谐波系数同时单调增加，但其变化是非线性的，即在临界值以下，谐波系数的变化趋于平缓，而超过临界值以后，随着强化相粒子体积百分数的增加，谐波系数快速增加。 |
| 9. | Adsl is a new modem technology ( the bandwidth is from 25 . 875k to l . lmhz ) that converts existing copper telephone lines into access paths for multimedia and high speed data communications , and maintains the regular telephone voice services . adsl provides data rates that expand the best existing access capacity ( isdn ) by a factor of 60 or more , and the best existing common analog access capacity ( v . 34 modems ) by a factor of 300 , without requiring any new cabling
它具有传统模拟modem和isdn无可比拟的速率优越性，其接入速率是isdn的60倍，是现有模拟modem ( v . 34 )速率的300倍，最大8mbps的下行传输速率和最大1mbps的上行传输速率，其原因是因为它使用了超过了传统modem的频带范围( 25 . 875k到1 . 1mhz的频带) ，采用了先进的编码和调制解调技术。 |
