Browsing Research publications by Author "Luo, Qiwu"
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Automated Visual Defect Detection for Flat Steel Surface: A Survey
Luo, Qiwu; Fang, Xiaoxin; Liu, Li; Yang, Chunhua; Sun, Yichuang (2020-01-01)Automated computer-vision-based defect detection has received much attention with the increasing surface quality assurance demands for the industrial manufacturing of flat steels. This article attempts to present a ... -
Dynamic Virtual Page-based Flash Translation Layer with Novel Hot Data Identification and Adaptive Parallelism Management
Luo, Qiwu; Cheung, Ray C.C.; Sun, Yichuang (2018-09-28)Solid-state disks (SSDs) tend to replace traditional motor-driven hard disks in high-end storage devices in past few decades. However, various inherent features, such as out-of-place update [resorting to garbage collection ... -
Generalized Completed Local Binary Patterns for Time-Efficient Steel Surface Defect Classification
Luo, Qiwu; Sun, Yichuang; Li, Pengcheng; Simpson, Oluyomi; Tian, Lu; He, Yigang (2019-03-01)Efficient defect classification is one of the most important preconditions to achieve online quality inspection for hot-rolled strip steels. It is extremely challenging owing to various defect appearances, large intraclass ... -
Headspace Oxygen Concentration Measurement for Pharmaceutical Glass Bottles in Open-path Optical Environment Using TDLAS/WMS
Luo, Qiwu; Song, Cao; Yang, Chunhua; Gui, Weihua; Sun, Yichuang; Jeffrey, Zoe (2019-12-10)Accurate measurement of oxygen concentration for pharmaceutical glass bottles is of great significance to ensure the asepsis of medicine and stability of ingredients. With merits of high sensitivity, low cost, non-contact, ... -
Jointly optimized echo state network for short-term channel state information prediction of fading channel
Luo, Qiwu; Zhou, Jian; Sun, Yichuang; Simpson, Oluyomi (2020-07-27)Accurately obtaining channel state information (CSI) in wireless systems is significant but challenging. This paper focuses the technique of machine-learning-based channel estimation. In particular, a jointly optimized ... -
Optimal Modeled Six-Phase Space Vector Pulse Width Modulation Method for Stator Voltage Harmonic Suppression
Luo, Qiwu; Zheng, Jian; Sun, Yichuang; Yang, Lijun (2018-09-29)Dual Y shift 30 six-phase motors are expected to be extensively applied in high-power yet energy-effective fields, and a harmonic-suppressing control strategy plays a vital role in extending their prominent features of low ... -
Real-Time Fault Detection and Diagnosis System for Analog and Mixed-Signal Circuits of Acousto-Magnetic EAS Devices
Luo, Qiwu; He, Yigang; Sun, Yichuang (2015-09-22)The paper discusses fault diagnosis of the electronic circuit board, part of acousto-magnetic electronic article surveillance detection devices. The aim is that the end-user can run the fault diagnosis in real time using ... -
Self-Learning Hot Data Prediction: Where Echo State Network Meets NAND Flash Memories
Luo, Qiwu; Fang, Xiaoxin; Sun, Yichuang; Ai, Jiaqiu; Yang, Chunhua (2020-01-03)Well understanding the access behavior of hot data is significant for NAND flash memory due to its crucial impact on the efficiency of garbage collection (GC) and wear leveling (WL), which respectively dominate the performance ... -
Surface Defect Classification for Hot-Rolled Steel Strips by Selectively Dominant Local Binary Patterns
Luo, Qiwu; Fang, Xiaoxin; Sun, Yichuang; Liu, Li; Ai, Jiaqiu; Yang, Chunhua; Simpson, Oluyomi (2019-02-11)Developments in defect descriptors and computer vision-based algorithms for automatic optical inspection (AOI) allows for further development in image-based measurements. Defect classification is a vital part of an ... -
Time-efficient fault detection and diagnosis system for analog circuits
Luo, Qiwu; He, Yigang; Sun, Yichuang (2018-11-07)Time-efficient fault analysis and diagnosis of analog circuits are the most important prerequisites to achieve online health monitoring of electronic equipments, which are involving continuing challenges of ultra-large-scale ...