Preliminary Works of Contact via Formation of LCD Backplanes Using Silver Printing

The fabrication of a thin‐film transistor backplane and a liquid‐crystal display using printing processes can eliminate the need for photolithography and offers the potential to reduce the manufacturing costs. In this study, we prepare contact via structures through a poly(methyl methacrylate) polymer insulator layer using inkjet printing. When droplets of silver ink composed of a polymer solvent are placed onto the polymer insulator and annealed at high temperatures, the silver ink penetrates the interior of the polymer and generates conducting paths between the top and bottom metal lines through the partial dissolution and swelling of the polymer. The electrical property of various contact via‐hole interconnections is investigated using a semiconductor characterization system.     

A blind detector for Rayleigh flat-fading channels with non-Gaussian interference via the particle learning algorithm

A blind particle learning detector (BPLD) is developed for signal detection in Rayleigh flat-fading channels with non-Gaussian interference. The parameters of the fading channel model and the noise model are all unknown. The impulsive noise is modeled as a mixture of Gaussian distributions, which is capable of representing a broad class of non-Gaussian noise. The particle learning algorithm is employed to simultaneously estimate signal and parameters of the fading channel model and the noise model. The delay weight method is used to improve the performance. Simulation results show that the performance of the BPLD proposed can follow closely the performance of the detector with known parameters of the fading channel model and the noise model.     

无机添加剂对银通孔浆料烧结渗透行为的影响

采用扫描电镜直接观察的方法,研究了氧化物或玻璃粉添加于通孔银浆中对浆料与Ferro A6生料带共烧行为的影响。结果表明,不加入无机添加剂时,生料带中的低熔点物相会向银通孔电极中渗透;质量分数10%的Si O2添加可阻碍渗透发生,并在电极与陶瓷孔界面处形成一个凸起的过渡层;用玻璃粉代替Si O2添加时,则发生反向渗透现象;在浆料中添加质量分数1%~4%的玻璃粉,则可以有效阻止低熔点物相的流渗,浆料的方阻也满足组件对银通孔浆料电学性能的要求。     

MIMO声呐的双尺度旋转不变子空间波达方向估计

为了提高单基地多输入多输出(MIMO)声呐阵列的波达方向估计性能,提出了双尺度旋转不变子空间(DR-ESPRIT)算法.结合MIMO阵列虚拟阵列的结构特征,首先利用ESPRIT算法通过各条虚拟线阵内、基线间距不大于半波长的子阵间的旋转不变关系得到无模糊的粗估计结果,之后利用虚拟线阵间、基线较长的子阵间的旋转不变关系得到...     

HDI板通盲不匹配产生的原因与改善方法

HDI板通盲孔不匹配会导致PCB产品的开路、短路以及图形偏位,本文通过改进定位方式,提高对位精度,探索出一种改善通盲不匹配问题的方法,就对位、定位系统及板材涨缩几个方面对HDI板通盲不匹配产生的原因及改善方法提出看法。     

基于Walsh-Hadamard变换的线性分组码参数盲估计算法

该文提出了一种容误码的线性分组码的参数盲估计算法。该方法首先基于线性分组码对偶码字的统计特性和Walsh-Hadamard变换解线性方程组的容错特性来实现对偶码字的判决,同时采用3倍标准差准则并根据理论分析给出了一个有效的判决门限。接着通过判断对偶空间归一化维数的最大值来实现码长和码组同步时刻的估计。最后利用对偶码字构造出相应的校验矩阵,实现了在较高误码率情况下对线性分组码参数的盲估计。计算机仿真结果表明,在比特误码率为0.03的情况下,该文所提算法仍能得到很好的估计效果。     

Blind single-image super resolution based on compressive sensing

Blind super resolution is an interesting area in image processing that can restore high resolution (HR) image without requiring prior information of the volatile point spread function (PSF). In this paper, a novel framework is proposed for blind single-image super resolution (SISR) problem based on compressive sensing (CS) framework that is one of the first works that considers general PSFs. The fundamental idea in the proposed approach is to use sparsity on a known sparse transform domain as a powerful regularizer in both the image and blur domains. Therefore, a new cost function with respect to the unknown HR image patch and PSF kernel is presented and minimization is performed based on two subproblems that are modeled similar to that of CS. Simulation results demonstrate the effectiveness of the proposed algorithm that is competitive with methods that use multiple LR images to achieve a single HR image.     

盲埋孔结构多层厚铜印制板工艺的研究

以一典型含有复杂盲埋孔结构的多层（18L）厚铜PCB产品的工艺制造过程为主线,较详细的介绍了产品结构设计、主要工艺过程以及厚铜压合、层间对位等难点工艺的应对问题,并最终通过实际实验及分析得出较适用的工艺方法,为此类产品的加工提供了很好的指导意义。     

Real-time blind source separation system with applications to distant speech recognition

A real-time BSS system based on DUET was developed and implemented in order to assess its potential as the front-end for a DSR engine. The system uses only two closely-spaced standard omni-directional microphones and a computer soundcard and was developed for low reverberation environments with several human speakers and different noise sources.     

Blind adaptive XPIC based on HOS

This paper presents a new blind XPIC and a new adaptive blind deconvolutional algorithm based on HOS processing, which separates and equalizes the signals in real time. The simulation results demonstrate that the performance of the proposed adaptive blind algorithm, compared with the conventional algorithms, is outstanding with the feature of feasibility, stability and fast convergence rate.