Viscoelastic plate-fluid interactive vibration and liquid sloshing suppression

The viscoelastic plate-fluid interaction problem was studied. Forced vibration of the interactive system was investigated, and the equivalent mechanical models were obtained. The conclusion is that, for some case, the inner damping of the viscoelastic baffle will play a major role for liquid sloshing suppression. The project supported by National Natural Science Foundation of China and Astronautics Ministry.     

基于NOLF双稳效应对经DSF压缩后的超短光脉冲进行消基座

基于非线性FP腔（NOLF）双稳效应，提出一种利用掺铒光纤放大器（EDFA）及NOLF对经DSF压缩后的超短光脉冲进行消基座的方案.利用耦合模方程，分析了NOLF的消基座特性.结果表明，通过合理选择NOLF的反射率、入射脉冲的中心频率与NOLF的共振频率的失谐量及EDFA的增益，可使脉冲的基座能量比减小一半. 关键词： 超短光脉冲 消基座 非线性FP腔 光学双稳 掺铒光纤放大器     

Novel Rat-race Hybrid Coupler for RF Front-end Module

In this paper, a novel compact rat-race hybrid coupler incorporating an improved beeline compact microstrip resonant cell(IB-CMRC) is presented firstly. The size of the coupler is reduced by 46.5% than conventional one due to IB-CMRC’s excellent slow-wave effect. The novel coupler possesses strong ability of high-order harmonic suppression (above 30 dB) in addition. The measured insertion loss is comparable to that of a conventional microstrip hybrid coupler. Great potential applications of this IB-CMRC can be explored in MICs and MMICs to reduce the circuits size, suppress harmonics and improve the overall performance of the RF front-end module.     

胶子遮蔽和末态作用对p—A碰撞中粲偶素和b夸克偶素产额压低的贡献

本文用胶子结构函数的遮蔽效应和末态作用分析了在ｐ－Ａ碰撞中粲偶素和ｂ夸克偶素产额压低的实验数据，较好地描述了粲偶素和ｂ夸克偶素产额的压低与Ａ和Ｘ２的关系．     

Rugate光学薄膜通带内反射次峰的抑制

本文探讨了抑制Rugate光学薄膜通带内反射次峰的各种方法。以五次函数匹配和正弦调制相结合的方法获得了在宽光谱范围内能很好抑制反射次峰并能保持其截止带反射率的Rugate膜系。     

Cross-talk Noise Suppresion in Volume Holography with a Composite Reading Beam

ＣｒｏｓｔａｌｋＮｏｉｓｅＳｕｐｐｒｅｓｉｏｎｉｎＶｏｌｕｍｅＨｏｌｏｇｒａｐｈｙｗｉｔｈａＣｏｍｐｏｓｉｔｅＲｅａｄｉｎｇＢｅａｍＬＩＸｉａｏｃｈｕｎＷＵＭｉｎｘｉａｎＨＥＱｉｎｇｓｈｅｎｇＪＩＮＧｕｏｆａｎ（ＤｅｐａｒｔｍｅｎｔｏｆＰｒｅｃｉ...     

Studying the Mode－Spectra Characteristics of An Above－Threshold Biased Semiconductor Laser

ＳｔｕｄｙｉｎｇｔｈｅＭｏｄｅ－ＳｐｅｃｔｒａＣｈａｒａｃｔｅｒｉｓｔｉｃｓｏｆＡｎＡｂｏｖｅ－ＴｈｒｅｓｈｏｌｄＢｉａｓｅｄＳｅｍｉｃｏｎｄｕｃｔｏｒＬａｓｅｒ￥ＸＩＡＧｕａｎｇｑｉｏｎｇ；ＷＵＺｈｅｎｇｍａｏ；ＣＨＥＮＪｉａｎｇｕｏ；ＬＵＹｕｃｕ...     

MM-Wave Band Transversal Filter with Improved Spurious Characteristics

A spurious-suppressed transversal filter using the multiple-coupled line is proposed. The frequency characteristics of the multiple-coupled line are analyzed in detail. In order to compare the performances, the novel spurious-suppressed transversal filter using triple-coupled half-wavelength directional couplers is designed at 30 GHz. The spurious-suppression characteristics of the proposed transversal filter are verified by the full wave analysis and the measurement. The spurious response of the fabricated filter is effectively suppressed and the large attenuation is obtained in the stopband.     

抑制性消减杂交方法的建立

为建立研究基因表达差异的抑制性消减杂交（SSH）方法，以未加诱导剂处理的结肠癌LoVo细胞提取的mRNA为模板合成的cDNA作为驱赶子（driver)，联合使用10.0μmol/LATRA和0.1μmol/L1,25-(OH)2D3诱导2d的LoVo细胞提取的mRNA为模板合成的cDNA作为测试子（tester)进行SSH实验，结果为：消减产物与未消减样品（对照）在琼脂糖凝胶电泳图谱上明显不同，前者可见一些扩增条带，其大小范围在100-1000bp之间，本实验说明SSH方法对于识别差异表达的基因具有高效性。     

具有区域极点约束的柔性梁鲁棒H∞振动主动控制

本文基于H∞控制理论研究了传感器和作动器非同位配置情况下,柔性悬臂梁的多模态振动抑制问题。采用频域辨识方法获取低阶名义模型,合理选取加性不确定权函数和性能权函数,将鲁棒H∞控制问题转化为标准H∞控制问题。为了避免H∞控制器设计过程中产生的零极点对消问题,在求解过程中引入区域极点约束。比较了鲁棒H∞控制器和不考虑高阶未建模动态的非鲁棒H∞控制器的控制效果,实验结果表明,设计的鲁棒H∞控制器能够有效抑制柔性梁的前三阶模态振动,而且不会发生溢出问题。