PLC在矿井提升机控制系统中的应用

提出了使用可编程控制器PLC对矿井提升机的控制系统进行技术改造的观点,并对PLC控制提升机制动系统进行了设计,大大提高了矿井提升机运行的安全性和稳定性。     

棉浆粕定量水分监控系统的设计

基于“组态王”设计了一个棉浆粕生产过程的计算机监控系统，通过控制和调节棉浆的浓度，流量以及烘缸蒸汽压力，达到满足棉浆粕定量水分的生产要求，并且可在局域网上进行监控。     

局部统计同态滤波用于CO2激光成像的图像处理

在将局部统计同态滤波方法用于单幅CO2激光成像雷达图像处理的基础上，重点研究分析了参数选取与图像处理效果的关系；同时也分析了同态均值滤波的局部统计同态滤波。     

Multilayer resonators and a bandpass filter fabricated from a novel low-temperature co-fired ceramic

The main objective of this study was to make components from a novel low-loss, low-temperature Co-fired ceramic (LTCC) dielectric, which was also compatible with a high-conductivity silver paste. The multilayer-component fabrication procedure is presented together with a composition for a tape-casting slurry, choice of conductor paste, and LTCC process parameters. A good Q factor, >100 at 2 GHz, using the novel material system has been achieved for λ/2 resonators operating in the frequency range 1.7–3.7 GHz. An excellent frequency response for a 2 GHz bandpass filter has also been achieved; the insertion losses in the passband were less than −2 dB (bandwidth 60 MHz) and the attenuation more than 25 dB in the stopband located 190 MHz higher.     

传输故障处理经验总结

处理传输故障的关键是故障的准确定位。为了达到这个目标,需要在维护时清楚故障定位的原则、排查故障的可能原因,掌握一种高效的手段或方法来迅速处理可能遇到的各种故障。     

Second Order Band-Pass Filter Design Using Single CC-CDBA

Six new second order band-pass filter configurations using only a single current-controlled current differencing buffered amplifier (CC-CDBA) are proposed. Further, the proposed filters also have a minimum number of external electronic components. They realize current-mode, voltage-mode and transadmittance-mode filter characteristics. The quality factor and natural frequency can be adjusted electronically without changing the values of the passive components. The proposed filters use a minimum number of passive elements (two or three). There is no second order active filter structure which uses two passive components and one active component in the literature. The validity of the proposed filters is verified through PSpice simulations.     

颜料分散法制备LCD用彩色滤色膜

记述了采用颜料分散法制备彩色滤色膜的工艺过程。在着色光刻胶的制备方法作了一些研究，测定了所制滤色膜的分光特性及色度性能，并对彩色滤色膜的耐热性，耐药品性，耐侯性进行了检验。     

基于MOCCⅡ多功能滤波器的设计

本文简要介绍了Mulitple-output CCⅡ（简称MOCCⅡ）器件的电路特性，提出了一个新颖的基于MOCCⅡ多功能滤波器的电路。该电路可同时实现一阶低通以及二阶低通、高通、带阻、全通和带通等输出。经分析，该电路具有很低的灵敏度。电路中所有RC元件均接地，便于集成等优点。     

自适应抗噪声送话器的算法研究

介绍了一种改进后的ＬＭＳ算法,使自适应滤波器权值更新的步长随着系统输出信号功率的变化而变化。在效果评价时提出了计算语音信号信噪比提高量的一个简单方法,即通过控制前后语音间隙的噪声能量的对比得出结果。     

基于非对称形变的全光纤宽阻滞滤波器的制作

本文提出的基于长周期光纤光栅（LPFG）的全光纤宽阻带滤波器的制做方法，基本原理是在光纤纤芯中引入周期性的非对称形变，从而使光纤纤芯的折射率发生周期性变化；提出了两种实现光纤纤芯非对称形变的方法，进而制做出阻带中心波长分别为1310nm和1550nm的全光纤宽阻带滤波器插入损耗分别小于0.8dB和1.4dB，后向反射损耗小于-70dB。这样的器件可用于提高WDM系统的隔离度。