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基于BRM的白光OLED恒定与步进应力加速寿命试验研究
OLED 加速寿命试验 威布尔 BRM
2012/8/7
了获得白光OLED的寿命信息,通过加大电流应力开展了二组恒定和一组步进应力相组合的加速寿命试验。采用威布尔函数描述白光OLED的寿命分布,利用双线性回归法(BRM)估计出威布尔参数,确定了加速寿命方程,对白光OLED寿命是否符合威布尔分布进行了Kolmogorov-Smirnov检验,并利用自行开发的寿命预测软件计算出平均寿命和中位寿命。数值结果表明,恒定步进应力加速寿命试验方案是切实可行的,白光...
应用于语音信号处理的FPGA并行访问设计
动态置换 FPGA 并行访问 语音信号处理
2012/4/19
为了实现实时语音处理，利用FPGA并行访问的特性，采用低地址物理存储空间由FPGA可配置逻辑模中的存储资源实现；高地址的物理存储空间由存储阵列实现，设计了动态置换算法来控制逻辑地址空间到物理空间的映射，将频繁访问且冲突概率高的数据块映射到低地址的物理存储空间上。实验数据表明，采用并行访问控制的动态置换算法能够实现稳定的访存性能。
利用自由度凝聚方法和模态综合法，建立了一种面向元器件的PCB性能分析方法，并在此基础上建立了面向元器件的PCB布局优化方法。该优化方法面向元器件，可大大缩减结构分析自由度的数量，并能充分体现元器件的重用性。另外，在优化模型的求解和实现上，考虑元器件间的几何干涉提出了改进的遗传算法，并利用面向对象ANSYS二次开发方法开发了优化软件。通过优化算例结果表明该优化方法是有效的和可行的。
A new LVI assisted PSFB DC-DC converter
DC-DC converters soft switching ZVS PSFB converter linear variable inductor (LVI)
2011/3/22
In this study, a new Phase Shifted Full Bridge (PSFB) Pulse Width Modulated (PWM) isolated dc-dc converter is proposed. In the proposed converter, resonant inductor is replaced with Linear Variable In...
Determining wave propagation characteristics of MV XLPE power cable using time domain reflectometry technique
Cross-linked polyethylene distribution power cables time domain reflectometry propagation constant attenuation constant phase constant propagation velocity
2011/3/22
In this paper, the wave propagation characteristics of single-phase medium voltage (MV) cross-linked polyethylene (XLPE) power cable are determined using time domain reflectometry (TDR) measurement te...
An extended component-based reliability model for protective systems to determine routine test schedule
Reliability protective system routine test redundancy
2011/3/23
This paper presents a novel approach for evaluating the reliability of protective systems taking into account its components reliability. In this paper, a previously proposed extended model is used fo...
针对半导体芯片封装测试工厂多产品和半柔性并联生产线的预防性维修调度问题，提出了以生产时间最大化为目标函数，以多产品情况下生产线柔性限度、各产品所需的生产时间要求、预防性维修宽放区间、维修班组数量为约束的多产品半柔性并联生产线预防性维修调度的模型。将该模型应用于某芯片封装测试工厂的多产品半柔性并联生产线的预防性维修调度，在lingo9.0软件中建模并进行模型求解。调度结果已成功运用于实际生产，验证了...
Analysis of frequency characteristics of electrical arcs on the insulating sheath of the ADSS fiber optic cables
ADSS cable dry-band arcing frequency spectrum ageing process
2011/3/22
The insulating outer-sheath of ADSS (All dielectric self supporting) cables used on high voltage transmission lines are often subjected to various environmental effects. The ageing process of cable sh...
Neuro-fuzzy soft-switching hybrid filter for impulsive noisy environments
a-stable noise nonlinear filtering myriad filter hybrid filter
2011/3/22
In this study, a new soft-switching hybrid filter based on a neuro-fuzzy network for impulsive noisy environments is proposed. The hybrid filter was built by combining an adaptive finite impulse respo...
支持双向布线结构的一种半定制PLC设计方法
设计方法 现场可编程门阵列 硬核 软核
2012/4/19
提出一种新的可编程逻辑核设计方法。该方法采用结构化的方式进行电路硬件描述，采取模块复用的方法减少代码编写工作量，通过半定制的后端流程得到可编程逻辑核版图。与传统的“软核”设计方法相比，新方法避开了综合步骤，解决了“组合逻辑环”的问题，可以实现主流的双向结构的可编程逻辑核，且版图面积减少了50%左右。用所提出的方法设计的可编程逻辑核实现了预期的组合及时序逻辑电路功能，验证了该方法的可行性。
Performance analysis of swarm optimization approaches for the generalized assignment problem in multi-target tracking applications
Generalized assignment problem ant colony optimization particle swarm optimization data association target tracking
2010/11/22
The aim of this study is to investigate the suitability of selected swarm optimization algorithms to the generalized assignment problem as encountered in multi-target tracking applications. For this p...
Usage of spline interpolation in catheter-based cardiac mapping
Surface interpolation, spline interpolation, catheter-based cardiac mapping, computer simulation
2010/11/22
Due to their minimal invasiveness catheters are highly preferred in cardiac mapping techniques used in the source localization of rhythm disturbances in the heart. In cardiac mapping, standard steerab...
Detection of static eccentricity for permanent magnet synchronous motors using the coherence analysis
Permanent magnet synchronous motor eccentricity fault diagnosis spectral analysis
2010/11/22
This paper reports on work to detect the static eccentricity faults for permanent magnet synchronous motor (PMSM) using spectral analysis methods. Measurements are carried out by collecting the stator...
Design and evaluation of a linear switched reluctance actuator for positioning tasks
Actuator design linear switched reluctance position control sliding mode
2010/11/22
This paper presents the development of a new linear switched reluctance actuator and confirms its applicability to perform positioning tasks. After the explanation of the actuator working principle an...