To meet the requirements of miniaturization, high gain and wideband of UHF antenna for aircraft SAR, the gain loss produced by narrowing back cavity of short back radiation antenna is analyzed.
针对超高频机载合成孔径雷达天线小型化、高增益和宽频带的问题，分析了短背射天线缩小背腔的增益损失。
Back-scattered field of electrically large concave cavity is analyzed with CRmethod.
利用复射线法分析了电大尺寸凹腔的后向散射场。
At the same time with the screw pump, screw and screw with each other form a sealed cavity between one another to ensure airtight, otherwise there may be liquid from the gap in the back to go back.
同时螺杆与泵体、螺杆与螺杆间又相互形成密封腔，保证密闭，否则就可能有液体从间隙中倒流回去。
Based on rate equations, the laser output characteristic under different fiber length and back-cavity mirrors is studied, and the distribution of pump power and laser power is discussed.
基于激光器速率方程，分析了激光输出与光纤长度、后腔镜的关系，讨论了小功率泵浦时光纤内的功率分布情况。
Then the influence on flame structure of supersonic combustion of ratio of length and deep of cavity, obliquity of back edge of cavity and different schemes of fuel injection were studied.
用这种方法研究了不同凹腔长深比、凹腔后缘倾角和不同燃料喷注方案对超声速燃烧火焰结构的影响。
Conclusion: Reconstruction of acusticus back wall and hearing after radical mastoidectomy with homograft costal cartilage is effective to prevent mastoid cavity infection and improve hearing.
结论：以同种异体肋软骨对乳突根治术后耳行外耳道后壁及听力重建术，是防止乳突腔感染，提高听力的较理想方法。
The machine in the invention is characterized in: an air recirculation apparatus (10, 12) is disposed for conveying at least part of the air back to the machine cavity (11, 14-19).
本发 明机器的特点在于，设有一空气再循环装置（10，12），用于至少部分 地将空气输送回机器腔（11，14-19）中。
The impeller is arranged in an inner cavity formed by a pump cover and a pump body at the lower end of the pump shaft, and back blades are arranged on the impeller and are fastened by locking bolts;
在泵轴的下端，泵盖及泵体形成的内腔中设置有叶轮，叶轮上设有背叶片，并由锁紧螺钉紧固；
The annular magnet is embedded into an inner cavity of the rubber ring, the plastic cover disk is covered at the back face of the rubber ring.
将环形磁铁嵌入橡胶圈的内腔中，再将塑料罩盘盖在橡胶圈的背面。
In a beam transmission system of a CO2 laser, the reflection mirror can be used as back-view mirror or foldable reflection mirror in the laser cavity, while as a light bender outside the cavity.
在CO2激光器的光束传输系统中，反射镜在激光管腔内被用作尾镜和折叠式反射镜，而在腔外则充当了弯光器的角色。
State of the cavity field at the time of the mirror back to its original state is discussed, and a variety of multicomponent Schrdinger cat states which are different from those in the published…
讨论了当振动边界回到初态时的腔场态，得到了许多与已有文献不同的薛定谔猫态，这对于研究猫态的性质和应用是十分有意义的。
With the focusing lens and the medium pool replacing the back mirror, auto cavity-forming and laser output are realized.
用聚焦透镜和介质池取代激光器的后镜，可自动成腔输出激光。
With the focusing lens and the medium pool replacing the back mirror, auto cavity-forming and laser output are realized.
用聚焦透镜和介质池取代激光器的后镜，可自动成腔输出激光。
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