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Based on the first law of thermodynamics and the law of mass conservation, a thermodynamic model of the back-pressure cavity has been developed by considering influence by back pressure cavity, compression chamber and oil supply system.

本文在热力学第一定律及质量守恒定律的基础上，建立了背压腔的热力模型，模型详细考虑了背压腔与工作容积、压缩机内油路之间的联系，并通过他们之间的联系给出了背压腔压力的计算方法。

Ordinary no destruction , the ossicular chain can be erosions and destruction , but more slight and no transitional .the major CT findings in simple chronic middle ear on 2 patients were soft tissue in middle ear cavity ,and 1 patient findings hydropneumo, the bone of tympanic cavity cirrhosis ,no destruction .

其它征象包括乙状窦、鼓室盖、水平半规管、面神经管水平段骨质破坏。29例肉芽肿型中耳炎CT表现为中耳腔内的软组织密度影，部分有液平，鼓室壁增生、硬化，骨质破坏少见，听小骨可出现吸收破坏，但程度较轻，一般无移位。2例单纯型中耳炎表现为中耳腔内的软组织密度影，1例有液平，鼓室壁骨质硬化，无骨质破坏。

Also, the eigen frequency of trough structure resonant cavity and anisotropic media loaded resonant cavity was calculated.

该方法通过归一化电压和归一化电流直接求解出归一化的导纳矩阵，进而求解出微波网络的S参数矩阵。

In order to support a preselected resonant mode, a series of concentric rings (18) is formed in the blocking layer (16, 19), surrounding the resonant cavity (2) so as to provide a Bragg structure which reflects light from the cavity with a phase characteristic that supports the preselected transverse resonant mode.

为支持预定的谐振模式，在阻挡层（16、19）中形成一组围绕谐振腔（2）的同心环（18）以提供一种反射腔中的光的布拉格结构，其相位特性支持预定的横向谐振模。

Frequency stabilization of the external cavity diode laser to the iodine hyperfine structure components using extra-cavity iodine cell has been extensively studied and reported.

使用腔外的碘蒸气室将外腔二极体雷射稳频在碘的超精细结构成分上，这个方法已经被广泛地研究和报导。

The vaseline gauz, Merocel, Rhino rapid haemostatic material and the absorbable stanching satin were respectively packed into the nasal cavity of 407 eases after functional endoscopic sinus surgery. 48 hours later, the packed materials were pulled out. The symptoms such as headache, bleeding from nasal cavity and edema of nasal mucous membrane were observed and compared.

对407例鼻内镜术后的患者，分别采用凡士林纱条，膨胀海绵，瑞纳快速止血材料及可吸收性止血绫填塞鼻腔，48h后抽出填塞物，观察患者填塞及抽出填塞物鼻腔胀痛，头痛，出血程度及粘膜水肿情况进行比较。

The properties are the dispersion equation of IREBs drifting in the tube, and the transmission line model of IREBs interacting with the gap electrical field of input cavity of RKA and bunching in the drift tube. The expression of modulated current after the gap of input cavity is got, which is content with the experimental results.

建立了IREBs在漂移管中传输的色散方程，以及IREBs与RKA输入腔间隙电场相互作用和IREBs在漂移管中群聚传输的传输线模型，获得了电子束经过输入腔间隙后产生的调制电流表达式。

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。

Results rolls the massive sphere focus of infection altogether 25 examples (9 examples to have "crecent moon to draft", 8 examples have "air bronchial tube to draft", 5 example edges have "burr to draft", 3 examples have "corona to draft").the double lung spot punctual subtotal nodular focus of infection altogether 15 examples, in 13 example tubercle shade the small cavity, the pulmonary abscess type changes the l example obviously.big laminated consolidation 3 examples.the mediastinum lymph node increases the partner chest cavity or the pericardium accumulates the fluid l example.

结果：团块状球形病灶共25例(其中9例有&新月征&，8例有&空气支气管征&，5例边缘有&毛刺征&，3例有&晕征&)。两肺斑点状小结节状病灶共15例、其中13例结节影内可见小空洞，肺脓肿样改变1例，大片状实变3例。纵隔淋巴结增大伴胸腔或心包积液1例。

Tunable cavity filters are studied in this thesis, including calculation of resonant frequencies for a given cavity, design of cav...

本文研究可调滤波器，主要包括腔体滤波器的谐振频率计算、腔体尺寸设计以及尺寸缩短效应分析等内容。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。