Jiajun Liu

ORCID: 0000-0002-5301-8314
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About
Contact & Profiles
Research Areas
  • Human Mobility and Location-Based Analysis
  • Data Management and Algorithms
  • Advancements in Battery Materials
  • Advanced Graph Neural Networks
  • Advanced Image and Video Retrieval Techniques
  • Advanced Battery Materials and Technologies
  • Geographic Information Systems Studies
  • Sustainable Supply Chain Management
  • Genomics and Phylogenetic Studies
  • Anomaly Detection Techniques and Applications
  • Blockchain Technology Applications and Security
  • HVDC Systems and Fault Protection
  • Smart Grid and Power Systems
  • Digital Transformation in Industry
  • Supercapacitor Materials and Fabrication
  • Complex Network Analysis Techniques
  • High-Voltage Power Transmission Systems
  • Speech Recognition and Synthesis
  • Catalytic C–H Functionalization Methods
  • Power Systems and Renewable Energy
  • Forensic and Genetic Research
  • Nanoparticle-Based Drug Delivery
  • Multilevel Inverters and Converters
  • Fluid Dynamics and Turbulent Flows
  • Robotics and Sensor-Based Localization

University of Pittsburgh
2024-2025

Nankai University
2025

Southwest Jiaotong University
2023-2025

Daqing Oilfield of CNPC
2014-2025

Research Institute of Petroleum Exploration and Development
2025

Daqing Oilfield General Hospital
2014-2025

Xi'an Jiaotong University
2014-2024

Donghua University
2024

Beijing University of Posts and Telecommunications
2015-2024

Chengdu University of Information Technology
2022-2024

Understanding human mobility is crucial for a broad range of applications from disease prediction to communication networks. Most efforts on studying have so far used private and low resolution data, such as call data records. Here, we propose Twitter proxy mobility, it relies publicly available provides high positioning when users opt geotag their tweets with current location. We analyse dataset more than six million geotagged posted in Australia, demonstrate that can be reliable source...

10.1371/journal.pone.0131469 article EN cc-by PLoS ONE 2015-07-08

Conventional top-k spatial keyword queries require users to explicitly specify their preferences between proximity and relevance. In this work we investigate how eliminate requirement by enhancing the conventional with interaction, resulting in Interactive Top-k Spatial Keyword (ITkSK) query. Having confirmed feasibility theoretical analysis, propose a three-phase solution focusing on both effectiveness efficiency. The first phase substantially narrows down search space for subsequent phases...

10.1109/icde.2015.7113303 article EN 2015-04-01

Objective:To identify risk factors associated with carbapenem-resistant Klebsiella pneumoniae (CRKP) infection/colonization and death to investigate the resistance homology of CRKP.Methods:A retrospective 1:1 case–control study was conducted at Changhai Hospital, China, from January 2010 December 2011.The population included 30 patients CRKP matched carbapenem-susceptible K. (CSKP) same site. Homology analysis by multilocus sequence typing (MLST) pulsed-field gel electrophoresis (PFGE)....

10.1179/2047773215y.0000000004 article EN Pathogens and Global Health 2015-02-24

Flexible cameras are important early warning wearable devices to protect security personnel from dangerous events.

10.1039/c7nr04395c article EN Nanoscale 2017-01-01

Importance X-linked retinitis pigmentosa (XLRP) is a severe cause of early-onset RP in male individuals, characterized by degeneration photoreceptors, an extinguished electroretinogram, and vision loss. Objective To assess the duration improvements retinal sensitivity associated with single, subretinal injection cotoretigene toliparvovec (BIIB112/AAV8-RPGR) gene therapy after vitrectomy surgery dosed eye over 12 months part 1 Clinical Trial Retinal Gene Therapy for Retinitis Pigmentosa Using...

10.1001/jamaophthalmol.2022.6254 article EN cc-by-nc-nd JAMA Ophthalmology 2023-02-09

Long-term location tracking, where trajectory compression is commonly used, has gained high interest for many applications in transport, ecology, and wearable computing. However, state-of-the-art methods involve space-time complexity or achieve unsatisfactory rate, leading to rapid exhaustion of memory, computation, storage energy resources. We propose a novel online algorithm error-bounded called the Bounded Quadrant System (BQS), which compresses trajectories with extremely small costs...

10.1109/icde.2015.7113350 preprint EN 2015-04-01

A series of fluorescent nanothermometers (FTs) was prepared with Rhodamine dye-incorporated Pluronic F-127-melamine-formaldehyde composite polymer nanoparticles (R-F127-MF NPs). The highly soluble dye molecules were bound F127 micelles and subsequently incorporated in the cross-linked MF resin NPs during high-temperature cross-link treatment. morphology chemical structure R-F127-MF characterized dynamic light scattering, electron microscopy, Fourier-transform infrared (FTIR) spectra....

10.1021/acsami.6b03366 article EN ACS Applied Materials & Interfaces 2016-05-21

Through merging Cu-based carbenes in a radical process, novel crossover reaction has been successfully established, leading to the facile and efficient syntheses of various γ-peroxy esters 1,4-dicarbonyl compounds. Considering that both carbene complexes radicals are extremely reactive, therefore exist only extraordinarily low concentrations, high selectivity this coupling is unusual.

10.1039/c5cc05183e article EN Chemical Communications 2015-01-01

With the proliferation of GPS-enabled smart devices and increased availability wireless network, spatial crowdsourcing (SC) has been recently proposed as a framework to automatically request workers (i.e., device carriers) perform location-sensitive tasks (e.g., taking scenic photos, reporting events). In this paper, we study destination-aware task assignment problem that concerns optimal strategy assigning each proper worker such total number completed can be maximized whilst all reach...

10.1109/tkde.2019.2922604 article EN IEEE Transactions on Knowledge and Data Engineering 2019-06-12

Self-assembled DNA nanostructures have attracted significant research interest in biomedical applications because of their excellent programmability and biocompatibility. To develop multifunctional drug delivery from nanostructures, considerable key information is still needed for clinical application. Traditional fixed endpoint assays do not reflect the dynamic heterogeneous responses cells with regard to drugs, may lead misinterpretation experimental results. For first time, an integrated...

10.1039/c7tb03223d article EN Journal of Materials Chemistry B 2018-01-01

State-of-the-art trajectory compression methods usually involve high space-time complexity or yield unsatisfactory rates, leading to rapid exhaustion of memory, computation, storage, and energy resources. Their ability is commonly limited when operating in a resource-constrained environment especially the data volume (even compressed) far exceeds storage limit. Hence, we propose novel online framework for error-bounded ageing called Amnesic Bounded Quadrant System (ABQS), whose core (BQS)...

10.1109/tkde.2016.2598171 article EN IEEE Transactions on Knowledge and Data Engineering 2016-08-11

Objective: To assess the performance of pretreatment 18F-fluorodeoxyglucose positron emission tomography/computed tomography (18F-FDG PET/CT) radiomics features for predicting EGFR mutation status in patients with non-small cell lung cancer (NSCLC). Patients and Methods: We enrolled total 173 histologically proven NSCLC who underwent preoperative 18F-FDG PET/CT. Tumor tissues all were tested status. A PET/CT prediction model was established through multi-step feature selection. The...

10.3389/fonc.2020.568857 article EN cc-by Frontiers in Oncology 2020-10-08

Geo-tagged image is an ideal source for the discovery of popular travel places. However, aspects venues daily-life purposes like dining and shopping are often missing in mined locations from geo-tagged images. Fortunately check-in websites provide us a unique opportunity analyzing people's preferences their daily lives to complement knowledge This paper presents novel approach Areas Interest (AoI). By both images check-ins, exploits travelers' flavors as well activities local residents find...

10.1145/2393347.2393429 article EN Proceedings of the 30th ACM International Conference on Multimedia 2012-10-29
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