SK Telecom Co. said subscribers can pay 3, 000 won (US.50) to download a sound wave that is inaudible to human ears but annoys mosquitoes within a range of three feet.
韩国鲜京电讯公司表示，定制此项服务的用户只需花3000韩元(合2.50美元)便可下载一种声波。 这种声波可以在三英尺的范围内驱赶蚊虫，而人耳却听不见。
SK Telecom said subscribers can pay 3,000 won (US.50) to download a sound wave that is inaudible to human ears but annoys mosquitoes within a range of three feet.
韩国鲜京电信(SK)表示定制用户可以花费3000韩元(合2.54美元)下载一种声波，这种声波人耳察觉不到，但可以在3英尺范围内驱赶蚊虫。
The results in this thesis enrich the application range of media wave theory and the homotopy methods application in inversion problems, which are of great theoretical and practical significance.
本文的研究结果丰富了介质波动理论和同伦方法的应用范围，对促进正、反演在工程中的应用具有一定的理论意义与实际价值。
These mantle body wave data are used to investigate the range of variations in the travel time residuals which indicate the degree of mantle heterogeneity.
我们利用这些高精度的走时数据研究了地幔体波的走时残差的范围及地幔非均匀性的强度。
The range of fracture failure zones under the influence of blasting stress wave was identified and the calculation formula of the failure zone was also proposed.
研究了爆炸应力波作用下裂隙岩体断裂破坏范围并提出了新的破坏范围计算公式；
Through controlling the vibration amplitude and direct current component of the driving wave for the varifocal mirror, we can obtain the different depth range.
通过控制变焦镜驱动波的振幅和直流成份，可获得不同的深度范围。
The results of the experiment prove that the system has high stabilization, wide range in adjusting speed and small content of the wave in harmony, so it has a certain practical value.
实验结果表明，该系统稳定度高，调速范围宽，谐波含量小，具有较强的实用价值。
LFMCW (Linear frequency Modulation continuous wave) radar is a radar system which can get the information of range and velocity through modulating the frequency of continuous wave.
线性调频连续波雷达是一种通过对连续波进行频率调制来获得距离与速度信息的雷达体制。
The results show that there exists a density window for lower hybrid wave current drive (LHCD), i. e, LHCD would be achieved only within a certain range of plasma density.
结果表明，存在着驱动电流的密度窗口，即仅在一定的等离子体密度范围内才能驱动电流(通常在理论和实验上仅注意到驱动电流的密度上限)。
This method researches the echo envelope model which has been simplified in this paper under range wave and time excursion, and can compute the transmitting time more accurately.
该方法研究了幅度起伏和时间漂移条件下回波包络模型，并对模型进行了简化处理，可以更准确地计算超声波渡越时间。
SK Telecom Co. said subscribers can pay 3,000 won to download a sound wave that is inaudible to human ears but annoys mosquitoes within a range of three feet.
韩国鲜京电讯公司表示，定制此项服务的用户只需花3 000韩元便可下载一种声波。这种声波可以在3英尺的范围内驱赶蚊虫，而人耳却听不见。
Recently, the researching range of catalytic wave extends to organic compound.
近几年来，催化波的研究已扩展到有机化合物范畴。
The applications of the Kalman filtering algorithm in data processing (range and speed) of quasi continuous wave radar are studied. A new adaptive Kalman algorithm is realized.
主要完成卡尔曼滤波在准连续波雷达数据处理(距离和速度)中算法应用研究，实现一种新型自适应卡尔曼滤波算法。
Research on long range radio wave propagation plays a significant role in both mobile communication and electromagnetic environment.
研究电磁波的长距离传播对移动通信和电磁环境研究都具有重要意义。
The methods, technology and the applied range of shear wave exploration are summarized.
概述了横波勘探的方法技术及应用范围。
Using the ultrasonic wave detector to probe the flexible range of the extraction tunnel, grasping the rule of deformed tunnel directs the supporting design of the tunnel bolt.
利用超声波探测仪探测回采巷道的松动范围，掌握巷道的变形破坏规律，以此指导巷道的锚杆支护设计。
When the defect of pile body is located at the range of one - dimensional blind areas, the wave form of the reflected wave distorts and shows the characteristics of strong amplitude and low frequency.
当桩身缺陷位于一维“盲区”范围时，反射波波形畸变，并呈强振幅，低频率之特征。
When the detection range of the IR thermal imager is calculated by using NETD, the target radiation brightness difference must be calculated in the operating wave band.
在采用NETD计算红外热像仪的探测距离时，需要计算目标在热像仪探测波段范围内的辐射亮度差。
Sine wave output, low distortion and high stability, frequency range over with whole audio range.
正弦波输出，失真小，稳定性好，频率范围覆盖整个音频范围。
The flow-induced self-sustaining oscillation and standing wave resonance of protruding and trap cavities are studied at the low speed range.
本文研究了低流速范围内突出式和陷落式圆柱形腔的流激自持振荡和驻波共振问题。
On the other hand, the shock wave position of tip region moves backwards, the loading distributions of tip region have been changed, which lead to the increase of rotor operation range.
此外，尾迹使尖区激波位置后移，改变了尖部弦向的负荷分布，最终导致压气机稳定工作范围增大。
The number of wavelengths and their distribution are determined by the gain wave range and the degree of flatness required by the system.
波长的数量和分配取决于增益波段和系统要求的平坦程度。
This paper introduces a method to generate square wave of high resolving power and wide frequency range.
介绍了一种高分辨率宽频域方波脉冲的产生方法。
For HF ground wave OTH radar to detect ship targets in the shipboard environment is faced with a range of technical challenges.
高频地波超视距雷达在舰载条件下探测舰船目标面临着诸多挑战。
Conversion efficiency and pulse wave-forms will be affected by many factors due to the wide spectrum range and high intensity density of ultra-short pulses.
由于超短脉冲具有较宽的光谱范围及较高功率密度，倍频转换效率和谐波脉冲波形将受到许多因素的影响。
We design several different aperiodic photonic quantum-well (APQW) structures to achieve the filter function in preassigned wave length range.
本文的主要内容是设计几个不同的非周期量子阱来达到预设波段的滤波器功能。
The Linear Frequency Modulated Continuous Wave (LFMCW) Radar has high theoretical range precision and can be used for range tracking.
线性调频连续波(LFMCW)雷达在理论上有很高的测距精度，可用于对目标的距离跟踪。
Increase of detection range and fast precision tracking are main difficulties in weak aerial target detection for High Frequency Surface Wave Radar (HFSWR).
增大探测距离、快速精确跟踪是高频地波雷达探测飞行小目标所面临的主要困难。
In the engineering applications of short-range HF no-blind zone communication, analyzing the propagation modes and characteristics of electromagnetic wave plays guidance role to engineering practice.
分析近距短波无盲区通信的电波传播方式及性能，对指导工程实践具有重要的意义。
According to wave motion theory, finite element mesh size satisfying the needs of engineering calculating precision is relevant to the upper limit of frequency range of random (response) problems.
根据波动理论，满足随机响应工程计算精度要求的有限元网格大小与待求高频随机响应问题的频率范围上限有关。
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