捷联动调陀螺脉冲再平衡回路输出解耦的实现

在捷联系统中，动力调谐陀螺仪的再平衡回路通常按控制解耦设计，输出解耦则通过对回路输出电流数据的处理开环地实现，该文具体讨论了输出解耦的实现途径，建立了解耦运算方程，设计了硬件线路及软件流程图，仿真表明解耦效果较好，方案是可行的。     

矿用光纤气体检测中的最小二乘拟合方法研究

由于矿用光纤气体检测系统中线性最小二乘拟合方法只适用于光谱吸收率小于0.1的气体检测,针对光谱吸收率增大时气体吸收谱线与浓度的变化呈现非线性的问题,本文采用阻尼最小二乘拟合算法进行气体浓度的计算。实验结果表明,改进的矿用光纤气体检测系统检测极限由原来的100 ppm提高到了30 ppm量级,简化了标定程序,能够更好地满足煤矿安全生产的需求。     

Tunable-Q contourlet transform for image representation

A novel tunable-quality-factor (tunable-Q) contourlet transform for geometric image representation is proposed. The Laplacian pyramid in original contourlet decomposes a signal into channels that have the same bandwidth on a logarithmic scale, and is not suitable for images with different behavior in frequency domain. We employ a new tunable-Q decomposition defined in the frequency domain by which one can flexibly tune the bandwidth of decomposition channels. With an acceptable redundancy, this tunable-Q contourlet is also anti-aliasing and its basis is sharply localized in the desired area of frequency and spatial domain. Our experiments in nonlinear approximation and denoising show that the contourlet using a better-suitable quality factor can achieve a more promising performance and often outperform wavelets and the previous contourlets both in visual quality and in terms of peak signal-to-noise ratio.     

一种线性化轨对轨调节压控振荡器设计

为了解决控制电压范围小、调谐增益过大导致压控振荡器（voltage controlled oscillator, VCO）对控制线噪声抗干扰能力弱的问题，设计了一种高度线性化轨对轨频率调节的压控振荡器。采用SMIC 0.18μm CMOS工艺，设计了电压转电流电路实现控制电压与电流饥渴型振荡器尾电流的轨到轨线性转化，进而实现振荡频率的轨到轨线性调节；并且利用缓冲器优化振荡波形以适应锁相环系统应用。Cadence Spectre仿真结果表明，振荡器在1.8 V的轨对轨控制电压范围内都具有很好的线性，调谐增益为183 MHz/V，频率范围为0.89～1.22 GHz，中心频率1.06 GHz，功耗仅有227.8μW。本文设计适用于锁相环的集成应用，可为压控振荡器的设计提供支持。     

Robust tuning method for modified smith predictor

A robust tuning method for ο^Astroem＇s two-degree of Freedom Modified Smith Predictor （MSP） is proposed, and it can achieve the fast setpoint and load disturbance responses independently. The tuning rules may meet the requirements within a certain delay margin according to the robustness theory. The simulation results illustrate that the tuning method is efficient compared with other controllers. Finally, the MSP controller is applied to the 15L batch fermentation system for controlling the temperature in bioreactor, and the experiment results further verify that the robust tuning rules may achieve good performance.     

引入两种变压器模型后高频调谐回路品质因数的计算

本文给出了引入新的变压器模型后品质因数的计算及表示方法。     

声—光可调谐滤波器在光分插复用中的应用

充分抽复用（OADM）是实现全光网络（AON）的关键技术，介绍了OADM的4种方案，重点对基于声-光可调谐波波器（AOTF）的OADM进行研究，认为随着器件性能的不断改善，AOTF将在全光网络建设中起到重要作用。     

对电视机调谐选台过程的探索

从高频调谐器的工作过程,对电视机调谐选台进行了系统的讨论.     

电流加权电调谐静磁表面波带通滤波器频率响应的理论研究

完成了电流加权电调谐静磁表面波（ＭＳＳＷ）带通滤波器全部工作过程的理论 分析，实现了这种滤波器的ＣＡＤ。给出了几种典型结构频率响应的理论计算结果，并 与实验结果进行了比较，二者符合较好。     

Investigation on wavelength switching of widely tunable SGDBR lasers

The sampled-grating distributed Bragg reflector （SGDBR） laser is a typical and important photonic integrated device, and has potential wide application to agile optical networks. A new dynamic model for this device has been developed, which combines the traveling-wave method for the active region and the transfer-matrix method for the passive sections into a single procedure. The behaviors of wavelength switching of the SGDBR laser, which include the transient spectrum and mode competition, have been studied in detail using this model. A new efficient way has been proposed to improve the wavelength switching performance only by increasing the coupling coefficients without changing the carrier density.