Uche A. K. Chude-Okonkwo - IEEE Xplore Author Profile
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Uche A. K. Chude-Okonkwo

Also published under: Uche K. Chude-Okonkwo, Uche A. K. Chude Okonkwo

Publications
37
Citations
433
Publications by Year
20102024
Co-Authors:
Show All Co-Authors (30)
Image of author Uche A. K. Chude-Okonkwo

Uche A. K. Chude-Okonkwo

Also published under: Uche K. Chude-Okonkwo, Uche A. K. Chude Okonkwo

Affiliation

Institute for Intelligent Systems
University of Johannesburg
Johannesburg, South Africa

Publication Topics

Biography

Uche A. K. Chude-Okonkwo (M’08) received the Ph.D. degree in electrical engineering from Universiti Teknologi Malaysia in 2010. He was a Senior Lecturer with the Faculty of Electrical Engineering, Universiti Teknologi Malaysia, from 2011 to 2014. He is currently a Senior Research Fellow with the Department of Electrical, Electronics and Computer Engineering, University of Pretoria, South Africa. His current research interests include signal processing and wireless communication.(Based on document published on 23 November 2016).
Publications
37
Citations
433
Publications by Year
20102024
Co-Authors:
Show All Co-Authors (30)
Author's Published Works

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Zero-Shot Remote Sensing Scene Classification Based on Automatic Knowledge Graph and Dual-Branch Semantic Correlation Supervision

Chao Wang;Jiajun Yang;Tanvir Ahmed;Yang Zhao;Tong Zhang;Bing Sun;Tao Xie;Jie Wang;Tianyu Chen

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
Year: 2025 | Volume: 18 | Journal Article |
Remote sensing scene knowledge graphs symbolically describe the concepts of scenes and reveal their interrelations, highlighting robust knowledge modeling and inference capabilities in zero-shot remote sensing scene classification tasks. However, current graphs rely heavily on expert manual interpretation, making them susceptible to human biases and difficult to expand. They also lack quantitative...Show More

Zero-Shot Remote Sensing Scene Classification Based on Automatic Knowledge Graph and Dual-Branch Semantic Correlation Supervision

Chao Wang;Jiajun Yang;Tanvir Ahmed;Yang Zhao;Tong Zhang;Bing Sun;Tao Xie;Jie Wang;Tianyu Chen

Year: 2025 | Volume: 18 | Journal Article |

Negative Samples Mining Matters: Reconsidering Hyperspectral Image Classification With Contrastive Learning

Hui Liu;Chenjia Huang;Ning Chen;Tao Xie;Mingyue Lu;Zhou Huang

IEEE Transactions on Geoscience and Remote Sensing
Year: 2024 | Volume: 62 | Journal Article |
In recent years, there have been significant advancements in hyperspectral image (HSI) classification methods using contrastive learning. However, these methods often fail to effectively screen and mine negative samples during the construction of contrastive learning pairs. This oversight introduces negative samples that belong to the same class as the positive samples, thereby limiting the effect...Show More

Negative Samples Mining Matters: Reconsidering Hyperspectral Image Classification With Contrastive Learning

Hui Liu;Chenjia Huang;Ning Chen;Tao Xie;Mingyue Lu;Zhou Huang

Year: 2024 | Volume: 62 | Journal Article |

Improvement of Sea Ice Drift Extraction Based on Feature Tracking from C-SAR/01 Imagery

Yanli Yang;Tao Xie;Chengzhi Sun;Chao Wang;Jian Li;Xuehong Zhang

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
Year: 2024 | Volume: 17 | Journal Article |
In this study, the extraction of sea ice drift from imagery captured by the 1-meter C-SAR 01 satellite (C-SAR/01) was facilitated utilizing the oriented fast and rotated brief algorithm within the feature tracking procedure, thus addressing the previously unexplored area of sea ice drift extraction using C-SAR/01 imagery. The retained keypoints and nearest neighbor distance ratio test for sea ice ...Show More

Improvement of Sea Ice Drift Extraction Based on Feature Tracking from C-SAR/01 Imagery

Yanli Yang;Tao Xie;Chengzhi Sun;Chao Wang;Jian Li;Xuehong Zhang

Year: 2024 | Volume: 17 | Journal Article |

Mapping Surface Water Fraction Over the Pan-Tropical Region Using CYGNSS Data

Qingyun Yan;Shuci Liu;Tiexi Chen;Shuanggen Jin;Tao Xie;Weimin Huang

IEEE Transactions on Geoscience and Remote Sensing
Year: 2024 | Volume: 62 | Journal Article |
Cited by: Papers (13)
A new method, which integrates multivariable consisting of soil moisture (SM) active passive (SMAP)-derived SM and vegetation optical depth, the water seasonality, geolocation, digital elevation model (DEM), slope, and biomass as inputs and adopts the technique of bootstrap aggregation of regression trees (BARTs), is proposed for retrieving monthly surface water fraction (SWF) at a spatial resolut...Show More

Mapping Surface Water Fraction Over the Pan-Tropical Region Using CYGNSS Data

Qingyun Yan;Shuci Liu;Tiexi Chen;Shuanggen Jin;Tao Xie;Weimin Huang

Year: 2024 | Volume: 62 | Journal Article |

Zero-Shot Remote Sensing Scene Classification Method Based on Local-Global Feature Fusion and Weight Mapping Loss

Chao Wang;Junyong Li;Ahmed Tanvir;Jiajun Yang;Tao Xie;Liqiang Ji;Tong Zhang

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
Year: 2024 | Volume: 17 | Journal Article |
Cited by: Papers (3)
Zero-shot remote sensing scene classification refers to making the model to have the ability to identify the unseen class scenes based on seen class scenes, and has become a research hotspot in the field of remote sensing. Contemporary approaches in zero-shot remote sensing scene classification primarily focus on extracting global information from scenes, neglecting nuanced local landscape feature...Show More

Zero-Shot Remote Sensing Scene Classification Method Based on Local-Global Feature Fusion and Weight Mapping Loss

Chao Wang;Junyong Li;Ahmed Tanvir;Jiajun Yang;Tao Xie;Liqiang Ji;Tong Zhang

Year: 2024 | Volume: 17 | Journal Article |

Automated test input generation for android: towards getting there in an industrial case

Haibing Zheng;Dengfeng Li;Beihai Liang;Xia Zeng;Wujie Zheng;Yuetang Deng;Wing Lam;Wei Yang;Tao Xie

2017 IEEE/ACM 39th International Conference on Software Engineering: Software Engineering in Practice Track (ICSE-SEIP)
Year: 2017 | Conference Paper |
Cited by: Papers (21)
Monkey, a random testing tool from Google, has been popularly used in industrial practices for automatic test input generation for Android due to its applicability to a variety of application settings, e.g., ease of use and compatibility with different Android platforms. Recently, Monkey has been under the spotlight of the research community: recent studies found out that none of the studied tools...Show More

Automated test input generation for android: towards getting there in an industrial case

Haibing Zheng;Dengfeng Li;Beihai Liang;Xia Zeng;Wujie Zheng;Yuetang Deng;Wing Lam;Wei Yang;Tao Xie

Year: 2017 | Conference Paper |

Aladdin: Automating Release of Android Deep Links to In-App Content

Yun Ma;Xuanzhe Liu;Ziniu Hu;Dian Yang;Gang Huang;Yunxin Liu;Tao Xie

2017 IEEE/ACM 39th International Conference on Software Engineering Companion (ICSE-C)
Year: 2017 | Conference Paper |
Cited by: Papers (2)
Unlike the Web where each web page has a global URL to reach, a specific "content page" inside a mobile app cannot be opened unless the user explores the app with several operations from the landing page. Recently, deep links have been advocated by major companies to enable targeting and opening a specific page of an app externally with an accessible uniform resource identifier (URI). In this pape...Show More

Aladdin: Automating Release of Android Deep Links to In-App Content

Yun Ma;Xuanzhe Liu;Ziniu Hu;Dian Yang;Gang Huang;Yunxin Liu;Tao Xie

Year: 2017 | Conference Paper |

Investigation of optimal IGBT switching behaviours under advanced gate control

Kun Tan;Tao Xie;Zhiqiang Wang;Bing Ji;Paul Lefley

2017 IEEE 3rd International Future Energy Electronics Conference and ECCE Asia (IFEEC 2017 - ECCE Asia)
Year: 2017 | Conference Paper |
Cited by: Papers (4)
This paper investigates the advanced IGBT gate driving strategies which optimizes its switching behaviours and compares with the conventional driving method. The optimal IGBT performance not only relies on its advanced semiconductor design and fabrication techniques, but also the optimized local control and protection from intelligent gate drivers and global converter control strategy. An advanced...Show More

Investigation of optimal IGBT switching behaviours under advanced gate control

Kun Tan;Tao Xie;Zhiqiang Wang;Bing Ji;Paul Lefley

Year: 2017 | Conference Paper |

An improved Compressed Sensing algorithm and its application in SAR imaging

Yuanyuan Yang;Wei Chen;Tao Xie

2015 IEEE 16th International Conference on Communication Technology (ICCT)
Year: 2015 | Conference Paper |
Cited by: Papers (2)
To realize high-resolution SAR imaging, the amount of the raw data required for imaging is very large. Compressed Sensing (CS) can sample the raw data at a frequency lower than Nyquist frequency and image without losing resolution . In this paper, we propose an improved CS algorithm and employ it in SAR imaging to reduce the amount of data required for imaging. This algorithm improve the reconstru...Show More

An improved Compressed Sensing algorithm and its application in SAR imaging

Yuanyuan Yang;Wei Chen;Tao Xie

Year: 2015 | Conference Paper |

NO2 gas sensor based on polyvinylpyrrolidone/reduced graphene oxide nanocomposite

Junlong Huang;Guangzhong Xie;Yong Zhou;Tao Xie;Guangjin Yang

2014 IEEE Workshop on Advanced Research and Technology in Industry Applications (WARTIA)
Year: 2014 | Conference Paper |
Cited by: Papers (1)
Pure polyvinylpyrrolidone (PVP) film, reduced graphene oxide (RGO) film and PVP/RGO composite film were coated on quartz crystal microbalance (QCM) for nitrogen oxide (NO2) sensing at room temperature. These films were characterized by Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM), respectively. Because only a few RGO were deposited on QCM, the sensor based ...Show More

NO2 gas sensor based on polyvinylpyrrolidone/reduced graphene oxide nanocomposite

Junlong Huang;Guangzhong Xie;Yong Zhou;Tao Xie;Guangjin Yang

Year: 2014 | Conference Paper |

Research on the avalanche property of the Camellia S-box

Yuanqing Deng;Hui Shi;Jing Gong;Tao Xie

2011 2nd International Conference on Artificial Intelligence, Management Science and Electronic Commerce (AIMSEC)
Year: 2011 | Conference Paper |
The Camellia algorithm has four S boxes called as S1, S2, S3 and S4. Because the S1-box is the core of other S boxes, the avalanche property of S boxes can be studied through testing the avalanche property of S1-box. The test results show that the Camellia S-box basically meet the strict avalanche criterion.Show More

Research on the avalanche property of the Camellia S-box

Yuanqing Deng;Hui Shi;Jing Gong;Tao Xie

Year: 2011 | Conference Paper |

Avalanche effect performance test on AES algorithm

Yuanqing Deng;Hui Shi;Jing Gong;Tao Xie

2011 Second International Conference on Mechanic Automation and Control Engineering
Year: 2011 | Conference Paper |
Cited by: Papers (2)
The avalanche effect is an important performance that any block cipher must have. With the AES algorithm program and experiments, we fully test and research the avalanche effect performance of the AES algorithm, and give the changed cipher bit numbers when respectively changing every bit of the plaintext and key in turn. The test results show that the AES algorithm has very good avalanche effect P...Show More

Avalanche effect performance test on AES algorithm

Yuanqing Deng;Hui Shi;Jing Gong;Tao Xie

Year: 2011 | Conference Paper |

Research on g-function of Camellia algorithm

Yuanqing Deng;Hui Shi;Lili Fang;Tao Xie

2011 Second International Conference on Mechanic Automation and Control Engineering
Year: 2011 | Conference Paper |
Based on the finite field theory, a common matrix equation on g-function of S1-box of Camellia algorithm is deduced, which is clear more than Camellia documents and very useful to understanding and using Camellia algorithm.Show More

Research on g-function of Camellia algorithm

Yuanqing Deng;Hui Shi;Lili Fang;Tao Xie

Year: 2011 | Conference Paper |

Boosting random write performance for enterprise flash storage systems

Tao Xie;Janak Koshia

2011 IEEE 27th Symposium on Mass Storage Systems and Technologies (MSST)
Year: 2011 | Conference Paper |
Cited by: Papers (3)
NAND flash memory has been successfully employed in mobile devices like PDAs and laptops. With recent advances in capacity, bandwidth, and durability, NAND flash memory based Solid State Disk (SSD) is starting to replace hard disk drive (HDD) in desktop systems. Integrating SSD into enterprise storage systems, however, is much more challenging. One of the major challenges is that server applicatio...Show More

Boosting random write performance for enterprise flash storage systems

Tao Xie;Janak Koshia

Year: 2011 | Conference Paper |

Impact of different factors on greenhouse gas generation by wastewater treatment plants in China

Tao. Xie;Chengwen. Wang

2011 International Symposium on Water Resource and Environmental Protection
Year: 2011 | Conference Paper |
Cited by: Papers (3)
Wastewater treatment plants (WWTPs) emit greenhouse gas (GHG), which may lead to climate change and global warming effect. During recent years, the increase of the number of WWTPs in China has made the study of the GHG emissions from WWTPs extremely important. This paper presents a complete estimation procedure of GHG generation by considering direct GHG emissions, indirect emissions from energy c...Show More

Impact of different factors on greenhouse gas generation by wastewater treatment plants in China

Tao. Xie;Chengwen. Wang

Year: 2011 | Conference Paper |

Research on complex structure-oriented accurate web information extraction rules

Tao Xie;Shengsheng Shi;Fuliang Quan;Chunfeng Yuan;Yihua Huang

2010 IEEE International Conference on Progress in Informatics and Computing
Year: 2010 | Conference Paper |
Cited by: Papers (2)
With the rapid growth of web information, there is an increasing need to easily and efficiently acquire accurate information from the massive and heterogamous web. Web information extraction is such a research area to meet these needs. In this paper, we analyze the shortcomings of related researches and systems and find that when extracting accurate web information with complex structures, few sys...Show More

Research on complex structure-oriented accurate web information extraction rules

Tao Xie;Shengsheng Shi;Fuliang Quan;Chunfeng Yuan;Yihua Huang

Year: 2010 | Conference Paper |

A UML frontend for IP-XACT-based IP management

Tim Schattkowsky;Tao Xie;Wolfgang Mueller

2009 Design, Automation & Test in Europe Conference & Exhibition
Year: 2009 | Conference Paper |
Cited by: Papers (12)
IP-XACT is a well accepted standard for the exchange of IP components at Electronic System and Register Transfer Level. Still, the creation and manipulation of these descriptions at the XML level can be time-consuming and error-prone. In this paper, we show that the UML can be consistently applied as an efficient and comprehensible frontend for IP-XACT-based IP description and integration. For thi...Show More

A UML frontend for IP-XACT-based IP management

Tim Schattkowsky;Tao Xie;Wolfgang Mueller

Year: 2009 | Conference Paper |

An empirical study of testing file-system-dependent software with mock objects

Madhuri R. Marri;Tao Xie;Nikolai Tillmann;Jonathan de Halleux;Wolfram Schulte

2009 ICSE Workshop on Automation of Software Test
Year: 2009 | Conference Paper |
Unit testing is a technique of testing a single unit of a program in isolation. The testability of the unit under test can be reduced when the unit interacts with its environment. The construction of high-covering unit tests and their execution require appropriate interactions with the environment such as a file system or database. To help set up the required environment, developers can use mock o...Show More

An empirical study of testing file-system-dependent software with mock objects

Madhuri R. Marri;Tao Xie;Nikolai Tillmann;Jonathan de Halleux;Wolfram Schulte

Year: 2009 | Conference Paper |

Energy harvesting with piezoelectric cantilever

Jiang-bo Yuan;Tao Xie;Wei-shan Chen

2008 IEEE Ultrasonics Symposium
Year: 2008 | Conference Paper |
Cited by: Papers (5)
Energy harvesting with the piezoelectric cantilever was studied under vibration environment. A theoretical model of piezoelectric cantilever was developed to determine the magnitude of power. The results predicted by the theoretical model were validated by the experimental data. Compared with the rectangular layer piezoelectric cantilever, the trapezoidal piezoelectric cantilever generated higher ...Show More

Energy harvesting with piezoelectric cantilever

Jiang-bo Yuan;Tao Xie;Wei-shan Chen

Year: 2008 | Conference Paper |

Design and fabrication of a linear ultrasonic motor using push-pull type L-B hybrid Langevin transducer with single foot

Shengjun Shi;Weishan Chen;Yingxiang Liu;Junkao Liu;Tao Xie

2008 IEEE Ultrasonics Symposium
Year: 2008 | Conference Paper |
Cited by: Papers (7)
A linear ultrasonic motor using longitudinal and bending (L-B) vibration hybrid Langevin transducer was developed to achieve high output power. The motor consist two exponential shape horns intersected at tip ends where located a single driving foot. L-B vibrations were superimposed in the elastic body of the motor and generated elliptical trajectory at driving foot which can actuate linearly. The...Show More

Design and fabrication of a linear ultrasonic motor using push-pull type L-B hybrid Langevin transducer with single foot

Shengjun Shi;Weishan Chen;Yingxiang Liu;Junkao Liu;Tao Xie

Year: 2008 | Conference Paper |

Quota-constrained test-case prioritization for regression testing of service-centric systems

Shan-Shan Hou;Lu Zhang;Tao Xie;Jia-Su Sun

2008 IEEE International Conference on Software Maintenance
Year: 2008 | Conference Paper |
Cited by: Papers (12)
Test-case prioritization is a typical scenario of regression testing, which plays an important role in software maintenance. With the popularity of Web services, integrating Web services to build service-centric systems (SCSs) has attracted attention of many researchers and practitioners. During regression testing, as SCSs may use up constituent Web servicespsila request quotas (e.g., the upper li...Show More

Quota-constrained test-case prioritization for regression testing of service-centric systems

Shan-Shan Hou;Lu Zhang;Tao Xie;Jia-Su Sun

Year: 2008 | Conference Paper |

Sacrificing Reliability for Energy Saving: Is it worthwhile for disk arrays?

Tao Xie;Yao Sun

2008 IEEE International Symposium on Parallel and Distributed Processing
Year: 2008 | Conference Paper |
Cited by: Papers (6)
Mainstream energy conservation schemes for disk arrays inherently affect the reliability of disks. A thorough understanding of the relationship between energy saving techniques and disk reliability is still an open problem, which prevents effective design of new energy saving techniques and application of existing approaches in reliability-critical environments. As one step towards solving this pr...Show More

Sacrificing Reliability for Energy Saving: Is it worthwhile for disk arrays?

Tao Xie;Yao Sun

Year: 2008 | Conference Paper |

A static data placement strategy towards perfect load-balancing for distributed storage clusters

Deepthi K. Madathil;Rajani B. Thota;Paulina Paul;Tao Xie

2008 IEEE International Symposium on Parallel and Distributed Processing
Year: 2008 | Conference Paper |
Cited by: Papers (19)
Applications like cluster-based Video-On-Demand (VOD) systems are inherently data-intensive because clients frequently retrieve data stored on a distributed storage subsystem interconnected by a high-speed local network. To meet the Quality-of-Service (QoS) imposed by the clients, quick responses to access requests are fundamental for these applications. Among the numerous ways to reduce response ...Show More

A static data placement strategy towards perfect load-balancing for distributed storage clusters

Deepthi K. Madathil;Rajani B. Thota;Paulina Paul;Tao Xie

Year: 2008 | Conference Paper |

Inferring access-control policy properties via machine learning

E. Martin;Tao Xie

Seventh IEEE International Workshop on Policies for Distributed Systems and Networks (POLICY'06)
Year: 2006 | Conference Paper |
Cited by: Papers (7) | Patents (5)
To ease the burden of implementing and maintaining access-control aspects in a system, a growing trend among developers is to write access-control policies in a specification language such as XACML and integrate the policies with applications through the use of a policy decision point (PDP). To assure that the specified polices reflect the expected ones, recent research has developed policy verifi...Show More

Inferring access-control policy properties via machine learning

E. Martin;Tao Xie

Year: 2006 | Conference Paper |

SAHA: A Scheduling Algorithm for Security-Sensitive Jobs on Data Grids

Tao Xie;Xiao Qin

Sixth IEEE International Symposium on Cluster Computing and the Grid (CCGRID'06)
Year: 2006 | Conference Paper |
Cited by: Papers (1)
Security-sensitive applications that access and generate large data sets are emerging in various areas such as bioinformatics and high energy physics. Data grids provide data-intensive applications with a large virtual storage framework with unlimited power. However, conventional scheduling algorithms for data grids are inadequate to meet the security needs of dataintensive applications. To remedy...Show More

SAHA: A Scheduling Algorithm for Security-Sensitive Jobs on Data Grids

Tao Xie;Xiao Qin

Year: 2006 | Conference Paper |

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