查询词典 frequencies

Results The patients were predominently female teenagers with a history of gradual onset of bilateral hearing loss, pure tone audiometry revealed symmetric ascending audiograms with moderate hearing loss at frequencies below 1 kHz, but relatively normal hearing at 2 kHz and above. Speech reception thresholds were between 40 to 85 dB HL, discrimination score was from 29% to 68%. Stapedial reflex, auditory brainstem response and compound action potentials were absent or threshold elevated disproportionately to the pure tone threshold. All of the patients had normal cochlear microphonics and robust spontaneously and transiently evoked otoacoustic emissions, the TEOAE showed no contralateral suppression effects as seen in normal subjects.

结果 该病多在青春期后起病，女性较多发，表现为渐进性双耳对称性听力下降，纯音听力以低频损失为主，语言接受阈升高，分辨率下降，镫骨肌反射及ABR引不出或阈值明显升高与纯音听力不成比例，耳蜗微音器电位正常，听神经动作电位引不出，耳声发射波幅高、时程长且不为对侧声刺激所抑制。

Without question, the most effective absorber for midrange and high frequencies is rigid fiberglass.

毫无疑问，最有效的吸收中档和高频率是刚性的玻璃纤维。

However, the modulating sawtooth waveform 40 typically is more than a hundred millivolt in amplitude and is imposed at the same point 13 in the SOM 10 as the IF beat frequencies which may be only a fraction of a millivolt in amplitude.

但是，调节锯齿波波形40通常是超过100毫伏的幅度，是强加在同一地点13日在一次高级官员会议10击败的中频频率可能只有一小部分的毫伏幅度。

Two examples are given to show that order reduction technique based on modal value analysis method is superior to the common technique which simply selects the modal vecors associated with the lower modal frequencies.

通过两个算例说明本文方法是对通常选择低频模态的降阶方法的改进，提高了低阶模型的精度。

The range of frequencies that can be modulated to carry information on a specific transmission system.

频率范围，经过调制可以在指定的传输系统中携带信息。

At radio-frequencies the dielectric permittivity of cell suspensions are monotonic function of the measuring frequency and cell density.

微生物的存在会改变发酵液的电特性，发酵液在无线电频率范围内的电容率增量是测量频率和生物量浓度的函数。

Based on that the dielectric permittivity of cell suspensions is monotonic function of the measuring frequency and cell concentration at radio-frequencies,a new method for detecting cell concentrations on-line and in-situ is proposed .

利用发酵液在无线电频率范围内的电容率是测量频率与菌体浓度的函数，提出了一种实时在线检测发酵过程菌体浓度的新方法，设计了检测传感器和自动检测系统，并且实验验证了该检测方法及检测系统的可行

The frequencies of genotypes were significantly different among the lines (P.001), with BB genotype primarily existing in HU-Yang,++ genotype in Chinese Merino monotocous line, and B+ genotype in Chinnese Merino multiparous lines.

等位基因型频率在各品种间差异极显著（P.001），在湖羊中以BB基因型为主，在中国美利奴单胎品系中以++基因型为主，而在中国美利奴肉用和毛用多胎品系中以B+基因型为主。

Then he analysed and researched the frequencies. He found out finally that the parakeet's vocal cords have a special function of membrane vibration. The acoustic frequency of parakeet is very similar that of a myna——380Hz to 720Hz.

这位学者把小鹦鹉所说的"杰根是个小麻雀"这句话用宽频带记录成谱图加以分析研究，结果发现小鹦鹉有特殊的膜振功能，声频与八哥的声频极为相似，即380-720赫兹。

Mode analysis ,Shaking types , Natural frequencies , Dynamics equation

模态分析；振动模型；固有频率；动力学方程

A historical region of southwest France between the Pyrenees and the Garonne River. The duchy of Aquitaine was joined with France after the marriage of Eleanor of Aquitaine to King Louis VII in1137, but its possession was disputed after her subsequent marriage to Henry II of England.

阿基坦法国西南部一个历史地区，位于比利牛斯山和加隆河之间，在1137年阿基坦的埃莉诺与国王路易斯七世结婚之后阿基坦公国加入法国，但当她再嫁英国亨利二世后，其归属权便受到争议

There are moments when I look at the smiling , happy faces of my expectant staff and wonder how they will cope when confronted by an outraged housemaster along with an unrepentant and recalcitrant bleached blond teenager in 18 years ' time .

有时候，我看着那些满怀期待的员工微笑，幸福的脸，想着当他们遇到一位愤怒的宿舍管理员和一位不知悔改，叛逆，而且将头发染成白色的18岁少年时，他们会如何处理。