腔

The lumen of the acinus is small and narrow, but that of the valveolus is large and distended .

单腺泡腔小而狭窄，但小泡状腺的腔却大而膨满。

The lumen of the acinus is small and narrow, but that of the alveolus is large and distended

单腺泡腔小而狭窄，但肺泡的腔却大而膨满。

The measures of noise control: the wall of operating room is completely paved with 30mm thickness aluminum perforated acoustic panel, 100mm cavity; the ceiling is completely paved with 30mm thickness aluminum perforated acoustic panel, and 200mm cavity door is used as the sound insulation door.

噪声控制措施：操作室墙面满铺30 mm厚铝穿孔吸声板，100 mm安装后空腔；天花满铺30 mm厚铝穿孔吸声板，200 mm安装后空腔门为隔声门。

And the wall of test workshop is completely paved with 25mm thickness stainless steel perforated acoustic panel, 50mm cavity; using the sound lock double sound insulation door, the sizes are 2.4×1.64 m、2.149×1.04 m respectively; Double layer 3×8 mm thickness bulletproof glass sound insulation window, 50mm cavity; air inlet uses dissipative muffler, the size is 5×3×2 m, sound splitter is 150 mm thickness stainless steel protective facing.

试车间墙面满铺25 mm厚不锈钢穿孔吸声板，50 mm安装后空腔；采用声闸双重隔声门，尺寸分别为2.4×1.64 m、2.149×1.04 m；双层3×8 mm厚防弹玻璃隔声窗，50 mm空腔；进风口选用阻性消声器，尺寸为5×3×2 m，消声片为150 mm厚不锈钢护面。

Based on numerical simulation,the effect of base aerator on the length of lateral cavity has been analyzed.

侧空腔长度对射流挟气量及水流流态均有重要影响，采用3维数值模拟，分析了底部掺气坎尺寸对侧空腔长度的影响规律。

Using fluid dynamics FEM (two dimensional, three dimensional andaxisymmetric) and three dimensional acoustic FEM in meticulous analysis ofexpansion muffler structure, this paper studies the influences of each mufflercomponents' position, dimension, form and quantity on the fluid dynamic andacoustic performances;therefore the paper indicates that the end of the intruding tubeis the linchpin of the fluid dynamic performance of the whole muffler structure, thespringhead of muffler fluid dynamic performance is the smoothness of air current, themain factor which affects the acoustic attenuation value of expansion chamber muffleris the grade of saltation of the section of air conducting access, and the attenuationvalue of specific frequency can be dramatically enhanced by carefully designing thelength of expansion chamber.

本文通过流体力学有限元方法和三维声学有限元方法对扩张腔消声结构的参数化模型进行了细致的分析，研究了这种结构的各个组成部份的位置、大小、形状和数量对其流体力学与声学性能的影响，指出插入管端口是影响整个结构流体力学性能的关键，消声结构流体力学性能的根源是气流通过时的平稳程度；影响扩张腔消声量的主要因素为声波传播通路截面突变的程度，并可以通过精细的设计扩张腔轴向长度获得宽频或指定频率消声量的大幅度提高。

Based on the integration of the results of acoustic andfluid dynamic analysis, this paper points out that synthetical acoustic and fluiddynamic performance of muffler can be obtained by using square expansion chamber,by stringing together several podgy expansion chambers, by applying noise absorbingmaterial on chamber walls, by making chambers and pipers co-axial, by adding filletson the end of intruding pipes, and by making the diameter of outlet pipe a little greaterthan the diameter of the inlet pipe.

通过综合流体力学和声学有限元两方面的分析的结果，指出了采用方形扩张腔，采用多个短粗扩张腔串联，扩张腔壁面附吸声材料，使各管道同轴，在插入管端口加上圆角，并且令出口插入管管径略微大于入口插入管管径可以使消声结构获得最佳的声学和流体力学综合性能。

Not only that, in China, the United States through the sound of singing the national or through the same Nationalization of the Bel Canto won the people's acceptance and love, in concert, stressed respiratory depth, the smooth voice, chest, oropharyngeal cavity, the first cavity resonance mixed Use, and the atmosphere of confrontation and support highs to close or cover up the use of methods to find the best conversion after the treble, and so on, are made consistent with the requirements of Bel Canto, but certain requirements such as the transport chamber music and highlight areas The national style and characteristics, make it more Singing the national flavor, and this is the U.S.

不仅如此，在我国，通过美声化的民族唱法或通过民族化的美声唱法同样赢得了人们的认同和喜爱，在演唱时强调呼吸深度、声音的通畅，胸腔、口咽腔、头腔共鸣的混合使用，气息的支持与对抗以及高音区运用关闭或掩盖的方法来找到转换之后的最佳高音等方面，均作出了与美声唱法一致的要求，但某些要求如旋律的运腔等方面又突出了民族的风格与特色，使之更具民族唱法的韵味，这便是美声化的民族唱法。

In addition, many studies of patients with AVN showed plenty of special characteristics,such as age distribution and bone quality.Objective:To study the geometric features of proximal femur for the Chinese AVN population,in order to prove the existence of special characteristic of proximal femur for the disease and then develop an AVN-specialized stem evaluated by a validated finite element analysis.Methods:1.The author investigated the standard X-ray data of 127 cases(179 hips) with definite diagnosis of AVN to provide anatomical references for this disease.At the same time,we conducted a meta-analysis of anatomical studies of normal proximal femur data,including the section of LT+20,LT,LT-20 and CFI to identify the potential difference between AVN and normal population.

方法1、通过研究AVN患者标准X线正、侧位片127例(179髋)，获得股骨近端的解剖学数据，利用荟萃分析的方法比较AVN患者股骨近段髓腔特征平面(LT+20，LT，LT-20)及CFI的改变与以往研究数据的差异，并利用创伤性FNF患者资料代替正常人股骨数据进一步比较髓腔前、后、内、外四条曲线段上的差异。2、通过结合现代CAD技术，将内、外、前、后曲线拟合到AVN柄的外形上，选用短柄假体设计，近段设计利用AVN患者骨髓腔CT相对应位置的断面进行修正，设计AVN人工股骨柄。3、计算机三维有限元分析：①使用CAD软件SolidWorks和有限元软件Ansys所建立的髋关节股骨侧假体置换后的三维有限元模型。

Considering the design parameters of the BEPCⅡ, in the case of one cavity type being adopted, the thesis analyzes the RF performance of accelerating mode, the suppression of higher order modes , and the restriction caused by HOMs against beam current threshold.

结合BEPCⅡ的设计参数，论文对其中一种腔型在BEPCⅡ上使用时加速模式的微波性能、高次模的抑制效果以及高次模对储存流强阈值的限制等方面进行了分析，并在铝模型腔上测量了加铁氧体高次模抑制器前后，超导腔中各种谐振模式的有载品质因子及其频率的分布。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。