无结构

With ILO-92 Otodynamics Analyzer,distortion product otoacoustic emissionsat the 2 f1-f2 frequency were recorded from 86 normally hearing ears in response to four groups of different primary levels (L1=L2=75 dB SPL ; L1=L2=65 dB SPL ; L1=L2=60 dB SPL ; L1=65 dB SPL , L2=50 dB SPL).The average DPOAEs-gram demonstrated a bilobed contour with two peaks at approximately 1.5 kHz and 5 kHz and a "notch" between 2.5 kHz and 3 kHz.Moreover,the contour of DPOAEs-gram had no obvious changes with sex,ear or primary stimulus levels differences.

利用耳动态分析仪ILO-92，对48例听力正常人(86耳)在4组不同原始刺激强度下(L1=L2=75 dB SPL；L1=L2=65 dB SPL；L1=L2=60 dB SPL；L1=65 dB SPL，L2=50 dB SPL)进行畸变产物耳声发射检查，结果发现平均DPOAEs图呈双叶型轮廓：在1.5 kHz和5 kHz附近，2 f1-f2 DPOAEs存在两个高峰，在2.5～3 kHz附近存在一个低谷，此图型结构无性别、耳别差异。

Poly with sulfonic acid groups were readily synthesized with biphenol and 1,3-bis(4-fluorobenzoyl)benzene in the presence of excess potassium carbonate followed by sulfonation with chlorosulfonic acid.

以二氯二苯甲烷和2，6-二甲基苯酚为原料合成了含有阻碍基团的双酚单体，用此双酚单体和1，3-二(4-氟苯甲酰基苯)在无水碳酸钾存在的条件下反应制得聚芳醚酮，然后用氯磺酸磺化，控制反应条件，使磺酸基团恰好进入苯环对位，制得新型结构的磺化聚芳醚酮。

In the paper,the transmission of designed roller oscillating tooth reduction gear adopts osci llating tooth gear drive without exception,one-stage reduction gear and two-stage reduction gear have joined through spline coupling band;The joining way of shock wave thellomble and oscillating tooth adopts the biserial bearing of without inner ring of needle bearing,and directly adopts bearing outer ring as shock wave thellomble;Center wheel of two-stage reduction gear and center wheel of two-stage reduction gear passes through taper thread,and center wheel is fixed;As soon as the flange of input end and center wheel of one-stage reduction gear,the flange of export end and center wheel of two-stage reduction gear makes monobloc structure.

本文预设的井下减速器的传动均采用活齿传动，一级减速器的输出轴和二级减速器的输入轴通过花键联轴套联接；激波环与活齿的毗连方式采用能蒙受较大载荷的无内圈双列滚针不锈钢管，且直接采用不锈钢管外圈作为激波环；一级减速器的中心轮和二级减速器的中心轮是通过锥螺纹毗连的，且中心轮固定；一级减速器的中心轮与输入端的法兰盘，二级减速器的中心轮与输出端的法兰盘均做成整体的结构。

In the paper,the transmission of designed roller oscillating tooth reduction gear adopts oscillating tooth gear drive without exception,one-stage reduction gear and two-stage reduction gear have joined through spline coupling band;The joining way of shock wave thimble and oscillating tooth adopts the biserial bearing of without inner ring of needle bearing,and directly adopts bearing outer ring as shock wave thimble;Center wheel of two-stage reduction gear and center wheel of two-stage reduction gear passes through taper thread,and center wheel is fixed;As soon as the flange of input end and center wheel of one-stage reduction gear,the flange of export end and center wheel of two-stage reduction gear makes monobloc structure.

本文设计的井下减速器的传动均采用活齿传动，一级减速器的输出轴和二级减速器的输入轴通过花键联轴套联接；激波环与活齿的连接方式采用能承受较大载荷的无内圈双列滚针中国财经圈，中国财经圈，且直接采用进口中国财经圈外圈作为激波环；一级减速器的中心轮和二级减速器的中心轮是通过锥螺纹连接的，且中心轮固定；一级减速器的中心轮与输入端的法兰盘，二级减速器的中心轮与输出端的法兰盘均做成整体的结构。

Using two kinds of representative bridgeless PFC topologies as main circuit and IR1150 as control chip, two bridgeless PFC prototypes have been designed and the EMI of the two circuits has been tested.

采用两种比较有代表性的无桥拓扑作为主电路结构，控制电路采用单周控制芯片IR1150，设计了试验样机，并对两种PFC电路的EMI进行了测试分析。

The taxa examined, all of which have simple leaves with entire margins and camptodromous pinnate venation, varied in their secondary venation, which was brochidodromous or brochidodromous to eucamptodromous, the m...

结果表明：含笑属、合果木属Paramichelia和观光木属Tsoongiodendron植物的脉序类型、一级脉、二级脉及其间脉和三级脉等特征表现出较高的一致性，三属间无明显的划分界限；但是，盲脉及其分支、网眼的发育和大小、叶缘末级脉等叶结构特征存在种间差异。

Intraoperative injection of anhydrous alcohol in inoperable pancreatic cancer;2. The long term results of injection anhydrous alcohol to treat bromidrosis and its standard protocol;3. Accordingly, it becomes the best choice in the production of anhydrous alcohol .

分子筛的晶体结构不同于硅胶、活性炭等，具有高吸附性，对H2O ，NH3，H2S，CO2 等高极性分子具有很高的亲和力，在相对湿度小于30 %时，分子筛的吸水量比硅胶和氧化铝都高得多，用其生产无水酒精是最佳方案，工艺流程分为：(1)两塔蒸馏加分子筛；(2)分子筛处理后在蒸馏塔回收；(3)分子筛处理后送专用塔浓缩。

Bis-(4′-bromobenzoyl)benzene was synthesized from terephthaloyl chloride and bromobenzene using aluminum chloride as a catalyst.

以对苯二甲酰氯和溴苯为原料，无水氯化铝粉末为催化剂，合成了1，4-双(4′-溴苯酰基)苯，其结构经1HNMR，IR和DSC表征。

In this paper, the configuration and the basic work principle of brushless DC motor are analyzed and its scientific mathematical model is established.

本文分析了永磁无刷直流电动机的结构及基本工作原理，建立了较为科学的数学模型。

Results: The bucco side compact bone of the mandibular ramus is thicker than the linguo side one.

结果 ：下颌升支颊侧皮质骨较舌侧厚，松质骨于升支中份厚度最大，部分下颌升支无松质骨结构。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。