| 1. | Because of the earth's curvature, the range is, broadly speaking, limited to the visual horizon .
由于地球的曲率，它的传播距离大体上说只限于视线所能及的范围。 |
| 2. | For this reason television signals have a short range
因此，电视信号的传播距离很短。 |
| 3. | How ever , in every rf communication system , the performance of amplifier - module is very important to the whole system
而在射频收发系统中,放大模块的性能好坏对整个系统通信质量、传播距离起着致关重要的作用。 |
| 4. | While wlan supports higher speeds and longer range than bluetooth , it also has higher costs and higher power consumption
虽然wlan支持比bluetooth更高的速度和更长的传播距离，但是它也需要更多的费用并且耗电量更大。 |
| 5. | Expressions are first established for c ( w ) and a ( w ) in terms of the fourier transforms of the wave shapes after two distances of travel . this is the general solution of the problem
首先在对两个传播距离不同的波进行傅立叶变换后，建立波的传播速度c ( w )和材料的衰减系数a ( w )两个项的表达式，得出问题的一般结论。 |
| 6. | The experimental result tells that in non - defect pipeline the stress wave excited in this way can propagate more than 100 meters , and then , the method put forward in this paper can serve the purpose to test pipeline in long - range
结果表明波在无缺陷管道中的传播距离可达百米以上，从而说明该实验方法适用于对管道的长距离检测。 |
| 7. | When the experimental frequency is above the critical frequency of 0 . 5 mhz , that the measured velocities are phase velocities must demand that propagation distance in the anisotropy media is less than two times of the transducer ' s diameter
以0 . 5mhz频率为界，大于此频率时，只要各向异性样品的传播距离小于换能器直径的两倍，测得的速度认为是相速度。 |
| 8. | With the changing of the pressure of water - filled pipe , diameter of leak hole , distance of propagation , the energy and spectrum of pipe leak signal will change . based on this system , these laws were researched by means of experiment
通过对充液管道泄漏声发射检测实验，研究了泄漏声发射信号的能量和频谱随压力、泄漏孔径大小及传播距离变化的规律； 2 |
| 9. | Under the condition of the same total power , both large single beam and small multi - beam can enlarge the lateral area of the light propagation effectively , but the maximal light absorption rate increases for latter approach
在总功率相同的情况下，使用单束大功率宽光源与多束功率较小的小光斑光源均能明显地增大光的侧向传播距离，但使用多束功率较小的小光斑光辐照时生物组织中的最大光吸收率增大。 |
| 10. | The results also indicate that , in a piece of gain medium , the cutoff frequency , " the most quickly growing frequency " and the integral exponential gain are variables of the beam intensity , medium gain coefficient and propagation distance
在考虑了介质的增益后，截止空间频率、最快增长频率以及最大增长因子不再像原始b - t理论中那样保持不变，它成了和光强、介质增益系数及传播距离有关的一个量。 |
