低频

The results show:① The predominant period bands represented in the lowfrequency fluctuation field are interseasonal fluctuations of 6 pentads (30 days) and 10 pentads (50 days) and the intraseasonal fluctuations of 15 to 17 pentads (75 to 85 days).② The 30day fluctuation period is an intrinsic fluctuation of the pentad precipitation in rainy season of Yunnan Province.③ When El Nino or La Nina happens, there is a 50day fluctuation period in the pentad precipitation in rainy season of Yunnan.④ While there is a 75-85 day fluctuation period in the pentad precipitation in rainy season of Yunnan, the precipitation anomaly percentage in the main flood period in Yunnan is positive; on the contrary, while there is no 75-85 day fluctuation, the precipitation anomaly percentage is negative.

结果表明：①云南地区雨季降水主要低频振荡周期为6候(30天)，10候(50天)的月际振荡和15～17候(75～85天)的季节内振荡；②云南雨季的候降水每年都存在30天振荡周期，30天振荡是云南雨季固有的振荡；③当发生El Nino或La Nina异常气候事件时，云南雨季的候降水存在50天振荡周期；④当云南雨季存在75～85天振荡时，云南主汛期(6～8月)降水距平百分率为正(除2000年为零距平)；当云南雨季不存在75～85天振荡时，云南主汛期降水距平百分率为负。

Were gathered Results By analyzing power spectral of EMGdi in experiment, we compare the ratio change of H/L between pre-experiment and post-experiment.

结果 在连续记录的EMGdi中早期的EMGdi与晚期的EMGdi比较高频与低频的比值显著降低，提示膈肌疲劳确实存在。

Chapter 3: introduces the design and realization of one part of PAMS, the PCI Communication Board, together with a brief description on PCI bus design principles.

第4章，介绍了系统组成模块&基于DAC的高谱纯度低频差分信号源&的设计与实现，讨论了Σ-Δ模-数转换器的原理和特点，并对信号源的补偿方法作了介绍。

An instrument for direct measurement in ohms of the resistance of a conductor in ohms.

在低频情况下，给定的导体的直流电阻实际上与其交流电阻一样。

Second, Taiwan Billiton Nadeschda environmental testing equipment:(self-produced self-marketing) Life expectancy button testing machine, tensile testing machine for electric, Sweep / low frequency / analog automotive vibration test rig, programmable temperature and humidity box, aging test chamber, salt spray testing machine, packaging / phone drop test units, load / plug wire bending test machine, measuring the rate of wire tester, rub tester wearable mobile phone, cell phone slider / clamshell test machine, 90 peel strength test machines, falling ball impact test machine, the breakdown strength test machine, drum drop test machine, plug line hoist swing tester, impact test chamber, combustion testing machine, standard light boxes, the frequency to avoid network rooms, projectors, video measuring instrument, fully automatic servo system plug test machine.

按键寿命试验机、电动拉力试验机、扫频/低频/模拟汽车振动试验台、可程式恒温恒湿箱、老化试验箱、盐雾试验机、包装/手机跌落试验台、负载/插头引线弯折试验机、线材测长率试验机、手机耐磨擦试验机、手机滑盖/翻盖试验机、90°剥离强度试验机、落球冲击试验机、破裂强度试验机、滚筒跌落试验机、插头线吊重摆动试验机、冲击试验箱、燃烧试验机、标准光源箱、频避网房、投影仪、影像测量仪、伺服系统全自动插拔力试验机等。

Flextensional transducer is a typical low frequency, high-power transmitter. It has the advantage of small volume and lightweight due to displacement amplification.

弯张换能器是典型的低频大功率发射器，由于具有振幅放大效应，使其在同等频率下，具有体积小、重量轻的优点。

On the basis of the characteristics of line boundary, this paper analyzes the different features of internal and external faults. The difference is that the ratio of high frequency to low frequency components in case of one external fault is less than that in case of the same internal fault, in which high frequency is in the band of line trap and low frequency is within 1~10kHz.

在线路边界频率特性的分析基础上，深入地分析了区内外故障时的特征差异：就某一类故障而言，区外故障时反行波中高频分量与(1~10kHz内的)低频分量的比值显著小于区内故障时的比值。

The extra low electromagnetic wave, wavelet technology, pipe track instrument,DGPS and tracing signal equipment are used to solve the key question of trans-mit- receive and communication.

研究信息融合技术在海底管道维修装置与检测装置间的应用，采用超低频电磁波，小波分析等技术与管线跟踪探测仪、DGPS以及示踪信号探测器等设备解决发射、接收、通讯技术中的关键技术点。

The internal friction in an 18-8-3-1 Cr-Ni--Mo-Ti heat-resisting steel was measuredwith a torsion pendulum, and an internal friction peak around 520℃ was observed.

用低频扭摆测量了18-8-3-1 Cr-Ni-Mo-Ti耐热钢的内耗，在520℃附近观察到一个内耗峰。

High tones are preferentially lost and the deafness progresses over a period of 1 12 years until the patient is stone deaf, or has a small island of low tone hearing.

在疾病早期，耳聋可以是不对称性的，且主要是高频的损害，常经1~12年后才完全失去听力或仅保留一小部分低频区听力。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失