高频率的

Results The tinnitus frequency, severity of subjective tinnitus, audiogram types and some items of function test above hearing threshold were significantly different in the five groups (P.05). Specific features of pure-tone test were found in the five groups: tinnitus frequency was low, whole- frequency hearing threshold high, audiogram even, short increment sensitivity index at 1 kHz high and tone decline at 4 kHz low in the syndrome of invasion of wind-heat; tinnitus frequency was high, high-frequency hearing loss common, audiogram abruptly descending, SISI and TD at 4 kHz high in the syndrome of liver-fire up-stirring; subjective tinnitus was loud, audiogram abruptly descending or gradually descending, SISI and 7W at 4 kHz low in the syndrome of stagnation of phlegm-fire; tinnitus frequency was high, subjective tinnitus low, audiogram markedly descending or hill-like, SISI and TD at 4 kHz high in the syndrome of kidney-essence deficiency; average hearing loss was less, audiogram irregular but abruptly descending or notched in most cases, SISI at 4 kHz low in the syndrome of weakness of spleen-stomach.

结果］耳鸣频率、自觉耳鸣程度、听力图类型及部分阈上功能测试指标在各证型间具有显著性差异(P.05)，这些指标在不同的证型中表现出不同的特点：风热侵袭型的耳鸣频率较低，全频听阈升高，听力图多为平坦型，短增量敏感指数得分在1kHz较高，而4kHz音衰值较低；肝火上扰型的耳鸣频率较高，听力损失以高频为主，听力图多为陡降型，4kHz SISI得分及TD值均较高；痰火郁结型的自觉耳鸣响度较大，听力图以陡降型或缓降型为主，4kHz SISI得分及TD值均较低；肾精亏损型的耳鸣频率较高，而自觉耳鸣响度较低，听力图以显降型或山型为主，4kHz SISI得分及TD值均较高；脾胃虚弱型的平均听力损失较小，听力图无一定规律性，但以陡降型或切迹型为主，4kHz SISI得分较低。

One of the most common ways to describe a wood's tonal properties is in terms of its frequency range,which is often broken down into low-end frequencies,mid-range and high-end frequencies.picture it as a visual spectrum,as we've done in the chart to the right,with the lower frequencies on the left and the higher frequen-cies on the right.the graph line for each wood visually depicts its general tonal range.rosewood and ovang kol,for example,tend to resonate with more low-end frequencies,whereas koa,cocobolo and maple tend to sound brighter from having more top-end frequencies.note also rosewood's"scooped"midrange and ovang-kol's fuller midrange.the doted lines for walnut and koa denote the expansion of low-end frequency range as the guitar opens up after a period of playing it.

最常见的方式描述了木材的声音特性是在其频率范围内，这往往是细分为低端频率，中端和高端frequencies.picture它作为一个视觉频谱，因为我们'维生素E这样做的图表，以权，以较低的频率在左边和更高的频率，种上right.the图线的每一个木材视觉描绘的一般音调range.rosewood和ovang科尔举例来说，往往会产生共鸣更多的低端频率，而兴亚， cocobolo和枫树往往从健全光明有更多的高端frequencies.note也花梨木的"收购"的中端和ovang -科尔的充分midrange.the doted线的核桃和兴亚指扩大低端频率范围内的吉他开辟了一段时间后，打它。

The short tandem repeats is a kind of DNA sequence formed repeatedly and connectively subjected to a core unit of several base pairs.The non-interfered multi-PCR was applied with 3 loci in the same reaction system.By using the technique of denaturing polyacrylamide gel electrophoresis and silver stain,the allele frequencies distributions of 3loci:F13A01,FESFPS and vWA in 10 minority populations only resided in Yunnan Province:Bai,Dai,Achang,Jingpo,Deang,Lahu,Bulang,Hani,Pumi and Jino.A satisfactory result was obtained and some significant genetic differences were noticed in different populations.

短串联重复序列是由几个碱基对作为核心单位串联重复形成的-类DNA序列，应用3个位点在同一反应体系中进行互不干扰的多重PCR，采用高分辨力的聚丙烯酰胺凝胶电泳分离、银染法显影技术，对云南省特有的白族、傣族、阿昌族、景颇族、德昂族、拉族、布朗族、哈尼族、普米族和基诺族等10个少数民族的F13AO1、FESFPS和vWA3个位点等位基因的基因频率分布进行了调查，获得了满意的结果，在不同群体中发现一些有意义的遗传差异。

One of the most common ways to describe a wood's tonal properties is in terms of its frequency range,which is often broken down into low-end frequencies,mid-range and high-end frequencies.picture it as a visual spectrum,as we've done in the chart to the right,with the lower frequencies on the left and the higher frequen-cies on the right.the graph line for each wood visually depicts its general tonal range.rosewood and ovang kol,for example,tend to resonate with more low-end frequencies,whereas koa,cocobolo and maple tend to sound brighter from having more top-end frequencies.note also rosewood's"scooped"midrange and ovang-kol's fuller midrange.the doted lines for walnut and koa denote the expansion of low-end frequency range as the guitar opens up after a period of playing it.

最常见的方式描述了木材的声音特性是在其频率范围内，这往往是细分为低端频率，中端和高端frequencies.picture它作为一个视觉频谱，因为我们'维生素E这样做的图表，以权，以较低的频率在左边和更高的频率，种上right.the图线的每一个木材视觉描绘的一般音调range.rosewood和ovang科尔举例来说，往往会产生共鸣更多的低端频率，而兴亚， cocobolo和枫树往往从健全光明有更多的高端frequencies.note也花梨木的&收购&的中端和ovang -科尔的充分midrange.the doted线的核桃和兴亚指扩大低端频率范围内的吉他开辟了一段时间后，打它。

The digital frequency source this paper researched uses high integrated DDS chip AD9851 as frequency sources and signal mirac processors AT89C51 as system control center, it can output 10Hz-20MHz signal with high-precision and high stability frequency. The evenness of signal within the range of 10MHz is low to 0.1dB degree, and the smallest step is low to 10Hz frequency.

本课题研究的数字频率源采用高集成度DDS芯片AD9851作为频率源；以单片机AT89C51作为系统的控制中心，实现了10Hz～20MHz的高精度、高稳定度的频率输出。10MHz内信号幅度的平坦度为0.1dB、频率最小步进为10Hz。

The third, since the electrons in the plasma are accelerated and ions move together, some harmful effects are also observed, such as both output powers of RBWO and FEL decrease versus the increase of plasma density. The results agree with the results of linear fluid model. In the unmagnetized plasma-loaded RBWO-FEL, output powers of pump source and FEL are obtained only in a narrow plasma density range and both have maximum. The results of simulation are in good agreement with the experimental results.

模拟分析了磁化等离子体填充的RBWO-FEL，尽管没有发现等离子体填充后RBWO及FEL输出功率的成倍增长，但是观察到等离子体的引入对RBWO-FEL产生以下影响：泵波及FEL的辐射频率的线宽得到明显增加；在较高的等离子体密度下，TM〓模将会被完全抑制；首次观察到T-G模振荡及功率输出，结果同线性理论计算结果基本一致；等离子体中的电子被加速及背景离子的移动将对器件工作产生不利影响。

Firstly, the writer classifies the investment structure and delimitates the research scope of investment structure in this chapter.

本章首先探讨了投资效率的价值标准，并对传统的投资效率评价体系进行了评折；其次在此基础上通过调查问卷的形式，对美国和我国企业的投资效率评价指标体系进行比较，发现我国企业在投资效率评价指标体系的选择过程中，存在着诸多的不理性，回收期指标的高频率使用，折现指标的倍受冷落应该是比较贴切的概括；再次，针对我国现状，构建了理性的投资效率评价体系。

This study investigated gene polymorphism of β_1-AR, CY2PD6, ACE and of BDKRB2 in the population of Hunan mid-region by PCR and PCR-RFLP method. The results showed that the frequencies of Ser49Ser and Arg389Arg genotype of β_1-AR gene were respectively 68.7% and 55.3%. And the allele frequencies of 49Ser and 49Gly were 83.9% and 16.1%, moreover 76.1% for 389Arg and 23.9% for 389Gly.

本研究应用PCR、PCR-RFLP方法首次对湖南中部地区403例原发性高血压患者的β_1-AR基因、CY2PD6基因、ACE和BDKRB2基因多态性的调查，结果显示：β_1-AR基因型Ser49Ser、Arg389Arg分别占68.7％、55.3％，49Ser和49Gly等位基因频率分别为83.9％、16.1％，389Arg和389Gly等位基因频率分别为76.1％、23.9％；CYP2D6等位基因频率由高到低依次为~*10、~*1、~*2、~*5，CYP2D6~*10~*10基因型频率最高，占47.4％；ACEI和D等位基因频率分别为55.8％、44.2％，基因型频率分别为Ⅱ型33.5％、ID型44.7％、DD型21.8％；BDKRB2-58T/C等位基因频率C、T分别为52.6％、47.4％，基因型频率分别为CC型24.8％、CT型55.6％、TT型19.6％。

But there was no current modulate circuit for TDLAS system.The design of modulation circuit for tunable diode laser based on DDS has been introduced.The main idea of design is using MCU to control DDS and D/A chips,so we can get sine wave and saw tooth signals.

DDS器件采用高速数字电路和高速D/A转换技术，具备了频率转换时间短、频率分辨率高、频率稳定度高、输出信号频率和相位可快速程控切换等优点，可以实现对信号的全数字式调制。

Under the first perturbation approximation, the contribution of the torso scatterings increases with higher frequency, with shorter distance between the source and head center, with lower elevation of the source, and with azimuth departing from the ear.

在一级微扰近似下，躯干散射对HRTF的影响整体上随频率的升高、或声源距离的减小、或仰角的降低、或声源相对受声耳方向的偏离角度的增大而增大。随着微扰级数的增加，高阶微扰项对计算结果的贡献迅速减少。

She gently rebuff ed him, but agreed that they could be friends

她婉言拒绝了，但同意作为朋友相处。

If in the penal farm, you were sure to be criticized.

要是在劳改农场，你等着挨绳子吧！