Zafar Ali

dblp:64/350 · DBLP profile ↗
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26ranked-venue papers
11as first author
18since 2021 · last 2026
0000-0002-6404-645XORCID · corroborated

Domains — the database's venue-derived domains; a paper can count in several

Artificial intelligence and machine learning · 20 · 7 first-author · 15 since 2021Computer networks · 3 · 3 first-authorDatabases, data management, data science and information retrieval · 2 · 1 first-author · 2 since 2021Applied, interdisciplinary, general and emerging computing · 1 · 1 since 2021
YearPublicationVenuePosition
2026 Label-efficient hierarchical self-supervised pretraining enhances ensemble models for biliary atresia diagnosis using gallbladder ultrasound
Adam A. Q. Mohammed, Xin Geng 0001, Jing Wang 0113, Ahmed Ameen Fateh, Zafar Ali
Eng. Appl. Artif. Intell.6
2026 Pythia-RAG: Retrieval-augmented generation over a unified multimodal knowledge graph for enhanced QA
Zafar Ali, Yi Huang 0017, Guilin Qi, Junlan Feng, Chao Deng 0002, Pavlos Kefalas
Knowl. Based Syst.1
2026 A citation recommendation model employing knowledge graph embedding
Zafar Ali, Guilin Qi, Sumaira Hussain, Irfan Ullah 0001, Shah Khalid, Adam A. Q. Mohammed, Inam Ullah 0001, Aalia Malik, Pavlos Kefalas
Soft Comput.1
2025 Improved paper recommendation model incorporating knowledge graph embedding with IRGAN model
abstract
The exponential growth of published papers in digital libraries has made finding relevant papers increasingly challenging for researchers. Numerous citation recommendation models have been developed to mitigate this issue and assist researchers in identifying pertinent works. Unfortunately, many of these models struggle to generate high-quality recommendations because they fail to capture diverse relationship patterns and effectively model the multifaceted relationships present in citation networks. Additionally, these models lack robustness in learning the representations of research papers. To address these limitations, we propose an innovative model that integrates graph embeddings to better understand hidden relationships in bibliographic networks and model multi-fold relations using the MRotatE framework. Our model first leverages graphical feature embeddings and content-based representations through MRotatE and SPECTER document embedding to construct initial representations of both query and candidate papers. These representations are then used in a generator and discriminator, which undergo adversarial training, ultimately resulting in improved recommendation outcomes. We evaluated our model against several baselines using three real-world datasets, and the results demonstrate that our approach outperforms existing models. The code for this project is publicly available online. 1
Nimbeshaho Thierry, Ingabire Batamira Christ Chatelain, Zafar Ali, Pavlos Kefalas
Trans. Recomm. Syst.3
2024 GLAMOR: Graph-based LAnguage MOdel embedding for citation Recommendation
abstract
Digital publishing’s exponential growth has created vast scholarly collections. Guiding researchers to relevant resources is crucial, and knowledge graphs (KGs) are key tools for unlocking hidden knowledge. However, current methods focus on external links between concepts, ignoring the rich information within individual papers. Challenges like insufficient multi-relational data, name ambiguity, and cold-start issues further limit existing KG-based methods, failing to capture the intricate attributes of diverse entities. To solve these issues, we propose GLAMOR, a robust KG framework encompassing entities e.g., authors, papers, fields of study, and concepts, along with their semantic interconnections. GLAMOR uses a novel random walk-based KG text generation method and then fine-tunes the language model using the generated text. Subsequently, the acquired context-preserving embeddings facilitate superior top@k predictions. Evaluation results on two public benchmark datasets demonstrate our GLAMOR’s superiority against state-of-the-art methods especially in solving the cold-start problem.
Zafar Ali, Guilin Qi, Irfan Ullah 0001, Adam A. Q. Mohammed, Pavlos Kefalas, Khan Muhammad 0001
RecSys1
2024 UTMGAT: a unified transformer with memory encoder and graph attention networks for multidomain dialogue state tracking
Bhuyan Kaibalya Prasad, Guilin Qi, Fanghua Ye 0001, Zafar Ali, Irfan Ullah 0001, Pavlos Kefalas
Appl. Intell.6
2024 Driver distraction detection using semi-supervised lightweight vision transformer
Adam A. Q. Mohammed, Xin Geng 0001, Jing Wang 0113, Zafar Ali
Eng. Appl. Artif. Intell.4
2024 Knowledge-enhanced model with dual-graph interaction for confusing legal charge prediction
Zafar Ali, Tianxing Wu 0001, Guilin Qi
Expert Syst. Appl.2
2023 PRM-KGED: paper recommender model using knowledge graph embedding and deep neural network
Nimbeshaho Thierry, Bing-Kun Bao, Zafar Ali, Zhiyi Tan 0002, Ingabire Batamira Christ Chatelain, Pavlos Kefalas
Appl. Intell.3
2023 CLRN: A reasoning network for multi-relation question answering over Cross-lingual Knowledge Graphs
Yiming Tan, Yongrui Chen 0002, Zafar Ali, Yuncheng Hua, Guilin Qi
Expert Syst. Appl.4
2023 An empirical study of pre-trained language models in simple knowledge graph question answering
Nan Hu 0004, Guilin Qi, Dehai Min, Jiaoyan Chen 0001, Jeff Z. Pan, Zafar Ali
World Wide Web (WWW)7
2022 Joint intent detection and slot filling using weighted finite state transducer and BERT
Waheed Ahmed Abro, Guilin Qi, Muhammad Aamir 0002, Zafar Ali
Appl. Intell.4
2022 A survey of deep learning techniques based Parkinson's disease recognition methods employing clinical data
Amin Ul Haq, Jianping Li 0002, Bless Lord Y. Agbley, Cobbinah Bernard Mawuli, Zafar Ali, Shah Nazir
Expert Syst. Appl.5
2022 Learning heterogeneous graph embedding for Chinese legal document similarity
Zafar Ali, Meng Wang 0009, Tianxing Wu 0001, Guilin Qi
Knowl. Based Syst.2
2022 Citation recommendation employing heterogeneous bibliographic network embedding
Zafar Ali, Guilin Qi, Khan Muhammad 0001, Siddhartha Bhattacharyya 0001, Irfan Ullah 0001, Waheed Ahmed Abro
Neural Comput. Appl.1
2022 Software defect prediction employing BiLSTM and BERT-based semantic feature
Md Nasir Uddin, Bixin Li, Zafar Ali, Pavlos Kefalas, Inayat Khan, Islam Zada
Soft Comput.3
2021 Global citation recommendation employing generative adversarial network
Zafar Ali, Guilin Qi, Khan Muhammad 0001, Pavlos Kefalas, Shah Khusro
Expert Syst. Appl.1
2021 Global context-aware multi-scale features aggregative network for salient object detection
Inam Ullah 0002, Muwei Jian, Sumaira Hussain, Li Lian, Zafar Ali, Imran Qureshi, Jie Guo 0012, Yilong Yin
Neurocomputing5
2020 Deep learning in citation recommendation models survey
Zafar Ali, Pavlos Kefalas, Khan Muhammad 0001, Bahadar Ali
Expert Syst. Appl.1
2020 Multi-turn intent determination and slot filling with neural networks and regular expressions
Waheed Ahmed Abro, Guilin Qi, Zafar Ali, Yansong Feng 0002, Muhammad Aamir 0002
Knowl. Based Syst.3
2020 Paper recommendation based on heterogeneous network embedding
Zafar Ali, Guilin Qi, Khan Muhammad 0001, Bahadar Ali, Waheed Ahmed Abro
Knowl. Based Syst.1
2019 Multi-turn Intent Determination for Goal-oriented Dialogue systems
abstract
Intent determination is one of the main tasks of natural language understanding and dialogue systems, aiming to determine the intent of the user’s input. Incorporating contextual information for intent determination has shown much promise. Recently, memory networks have been used to encode context from the dialogue history at each turn. However, these methods lack general mechanism for encoding intent patterns. In this paper, we investigate the incorporation of intent patterns extracted from regular expression for the multi-turn intent determination task. We propose a novel neural network model with two memories. The first memory encodes context from dialogue history at each turn whereas the second memory contains the information obtained from the regular expression patterns. We evaluate the model on Frames and Key-Value Retrieval datasets, the experimental results demonstrate that encoding intent patterns with memory networks significantly improves the multi-turn intent determination.
Waheed Ahmed Abro, Guilin Qi, Zafar Ali
IJCNN5
2008 A scalable call admission control algorithm
Zafar Ali, Waseem Sheikh, Edwin K. P. Chong, Arif Ghafoor
IEEE/ACM Trans. Netw.1
2000 Design of multimedia Web server using a neuro-fuzzy framework
abstract
In this paper, we propose a neuro-fuzzy scheduler (NFS) for a multimedia Web server to ensures synchronized delivery of multimedia documents. The problem of scheduling multimedia information to ensure media synchronization in a Web environment is identified as a multicriteria scheduling problem which is NP-hard. The proposed NFS makes an intelligent compromise among multicriteria by properly combining some scheduling heuristics. Performance of the NFS is compared with several known heuristics and a branch and bound algorithm. The results show that the proposed neuro-fuzzy scheduler can dynamically adjust to the varying work-load quite well.
Zafar Ali, C. S. George Lee, Arif Ghafoor
FUZZ-IEEE1
2000 Media synchronization in multimedia Web using a neuro-fuzzy framework
abstract
We consider the problem of multimedia synchronization in a Web environment. The workload generated by the multimedia server during a Web session exhibits variations that are quite different from the traffic fluctuation offered by a single media stream, e.g., a variable bit rate (VBR) video. We propose a set of parameters that can be used to characterize the workload generated by the multimedia server in a Web-type browsing environment. The workload characterization scheme is subsequently used in designing a server-based synchronization scheme. The problem of scheduling multimedia information to ensure media synchronization in a Web environment is identified as a multicriteria scheduling problem, which is NP-hard. The ability of fuzzy control to deal with multivariables makes it a good alternative for the multicriteria scheduling problem considered. Consequently, we propose a neuro-fuzzy scheduler (NFS) that makes an intelligent compromise among multicriteria by properly combining some scheduling heuristics. Performance of the NFS is compared with several known heuristics and a branch and bound algorithm. The results show that the proposed NFS ran dynamically adjust to the varying workload quite well.
Zafar Ali, Arif Ghafoor, C. S. George Lee
IEEE J. Sel. Areas Commun.1
1994 Distributed synchronization protocols for multimedia services on Internet
abstract
In this paper we present a distributed architecture for the existing and the emerging Internet for providing synchronized virtual channels (SVCs) to support presentation of multimedia information. The SVC architecture (SVCA) provides both intra-stream and inter-stream synchronization using resources available over the Internet and implementing distributed transmission scheduling mechanisms. We also propose a set of quality of presentation (QOP) parameters that quantify the quality of multimedia presentation from the user's point of view. Based on these parameters, we evaluate the proposed architecture and provides trade-offs between the QOP parameters and the required network resources to maintain this quality. Subsequently, these trade-offs are used to generate an optimal schedule for transmission of multimedia information over the SVCA. We also present protocol mechanisms to realize the SVCA.>
Zafar Ali, Miae Woo, Arif Ghafoor
ICNP1