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DGT: Unbiased sequential recommendation via Disentangled Graph Transformer

KNOWLEDGE-BASED SYSTEMS 2025年 310卷

作者： Li, Chenglin Xie, Tao Yu, Chenyun Hu, Bo Li, Zang Cheng, Lei Kong, Beibei Niu, Di Sun Yat Sen Univ Shenzhen Campus Shenzhen Guangdong Peoples R China Univ Alberta Edmonton AB Canada Tencent Platform & Content Grp Shenzhen Guangdong Peoples R China

Inevitable biases in the observed data often result in biased user representations and recommendation outcomes. Currently, most debiasing techniques are designed for traditional recommendation systems and typically rely on an unbiased dataset to estimate Propensity Scores (PS), which are crucial for developing robust recommendation models. However, in sequential recommendation scenarios, obtaining such an unbiased auxiliary dataset is extremely challenging, which significantly complicates the accurate estimation of inverse propensity scores and the extraction of unbiased user representations from biased user-item interactions. To address this challenge, we propose a Disentangled Graph Transformer (DGT) model enhanced by Propensity Scores for unbiased sequential recommendations. Specifically, we construct a temporal heterogeneous network and extract disentangled representations of users and items, effectively reducing the impact of self-selection bias in historical interaction data. Additionally, we decompose the propensity score into three distinct components: user-rating propensity, item-rating propensity, and user-item correlation propensity. By incorporating the distributions of user and item ratings as prior knowledge, we improve the precision of our propensity score estimation. Ultimately, these refined propensity scores are strategically employed as weighting factors within the loss functions and during the aggregation phase of the DGT layer, thereby strengthening the sequential recommendation system's resistance to biases. We have conducted extensive experiments on five benchmark datasets to assess the efficacy and robustness of our model. In comparison with the state-of-the-art approaches, our DGT model has exhibited superior ability to provide unbiased recommendations. Our codes and datasets are available at GitHub: https://***/ycy89/***.

关键词： Unbiased sequential recommendation Rating prediction Graph representation learning

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Development and validation of the Information Literacy Measurement Scale (ILMS-34) in Chinese public health practitioners

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BMC MEDICAL EDUCATION 2025年第1期25卷 1-15页

作者： Li, Hui Li, Ke-Ying Hu, Xia-Rong Hong, Xuan He, Yan-Ting Xiong, Hua-Wei Zhang, Yi-Li Southern Med Univ Affiliated Hosp 10 Dongguan Peoples Hosp Dongguan 523000 Peoples R China Southern Med Univ Guangzhou Dermatol Hosp Guangzhou 510515 Peoples R China Dongguan Maternal & Child Hlth Hosp Dongguan 523000 Peoples R China Shenzhen Ctr Dis Control & Prevent Shenzhou 518000 Peoples R China Southern Med Univ Sch Hlth Management Guangzhou 510515 Peoples R China

Background Public health professionals (PHPs) have increasing information needs to inform evidence-based public health decisions and practice, which requires good information literacy. A comprehensive and reliable assessment tool is necessary to assess PHPs' literacy and guide future promotion programs. However, there is a lack of measurement tools specifically for the information literacy of PHPs. Objectives This study aimed to develop an information literacy assessment tool for PHPs and test its psychometric properties among PHPs. Methods A 34-item Information Literacy Measurement Scale (ILMS-34) for PHPs was developed based on an extensive literature review, the Delphi method, and pilot testing. The ILMS-34 was further validated among 526 PHPs recruited from four cities in Guangdong Province, China, using convenience sampling. The sample was randomly divided into two equal groups for exploratory factor analysis (EFA) and confirmatory factor analysis (CFA), respectively. Other psychometric testing included item analysis, Cronbach's alpha coefficient, three-week test-retest reliability, and known-group validity. Results EFA yielded four dimensions for the ILMS-34: information consciousness, information knowledge, information ability, and information ethics. Subsequent CFA showed a good model fit of the four-factor structure (chi(2)/df = 1.485, RMSEA = 0.043, SRMR = 0.038, TLI = 0.977, CFI = 0.979). There were significant differences in each item between the high and low-scoring groups (p < 0.001), indicating good item discrimination. The ILMS-34 demonstrated good internal consistency with a Cronbach's alpha coefficient of 0.97 for the total scale (four subscales: 0.92, 0.92, 0.98, and 0.91, respectively). It also showed good test-retest reliability after three weeks with an ICC coefficient of 0.67. The DSE-MS scores varied by various sample characteristics, verifying the known-group validity. Conclusion The ILMS-34 is a multidimensional instrument with good psychom

关键词： Public health personnel Information literacy Scale Delphi method Reliability Validity

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Amorphization of halide solid electrolytes for lithium super-ionic conductivity

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JOURNAL OF MATERIALS CHEMISTRY A 2024年第40期12卷 27694-27702页

作者： Xu, Deli He, Jianshu He, Yuanyuan Wang, Sheng Wu, Guoxian Li, Minghua Cheng, Hao Yu, Kangzhe Huang, Xiao Tian, Bingbing Shenzhen Univ Inst Microscale Optoelect Int Collaborat Lab 2D Mat Optoelect Sci & Technol Minist Educ Shenzhen 518060 Guangdong Peoples R China

All-solid-state Li batteries (ASSLBs) have drawn attention as strong contenders for future energy storage owing to their extreme safety. When paired with uncoated 4 V-class layered positive materials, halide solid-state electrolytes (SSEs) exhibit excellent stability and compatibility, strong Li+ conductivity, and softness, making them highly potential SSE materials. Despite its cost-effective precursors, Li2ZrCl6 is plagued by its inherently poor ionic conductivity. Herein, we report a non-crystalline halide SSE, Li2.2ZrCl5.8S0.2, which possesses a superior Li+ conductivity (0.86 mS cm-1) and can be applied in high-performance ASSLBs. By integrating the Li2.2ZrCl5.8S0.2 SSE with a LiIn negative material and an uncoated LiCoO2 positive material, we acquire ordinary-temperature ASSLBs exhibiting excellent cycle-life (93.4% capacity retention under 1C for 100 cycles) and high-rate capacity (exceeding 80 mA h g-1 at 2C). The work proposes a non-crystalline strategy to improve Li+ conductivity in Li2ZrCl6-family SSEs for ASSLSBs. A non-crystalline strategy to improve Li+ conductivity in Li2ZrCl6-family halide solid-state electrolytes for all-solid-state Li batteries.

关键词： Solid-State Batteries

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Comparative analysis of traditional and integrated approaches to radiology training for residents

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BMC MEDICAL EDUCATION 2025年第1期25卷 1-12页

作者： Wang, Jinhua Wang, Liang Yang, Zhongxian Zou, Qian Liu, Yubao Southern Med Univ Shenzhen Hosp Med Imaging Ctr Shenzhen Peoples R China Univ Hong Kong Shenzhen Hosp Intervent Dept Shenzhen Peoples R China

Background The study aims to conduct a comparative analysis of traditional and integrated approaches to radiology teaching in order to evaluate the effectiveness of novel educational methods. Methods The study was conducted in shenzhen, China, between January and December 2023. It involved 100 radiology residents who were randomly assigned to either a traditional training (TT) group or an integrated training (IT) group. The average age of participants was 28 years. Results The TT group received conventional lectures and practical training, while the IT group used simulation software, interactive platforms, and artificial intelligence (AI) tools. The analysis revealed that the mean score of the IT group in the theoretical knowledge test was 170.3 +/- 15.1, which is significantly higher than that of the TT group (155.7 +/- 20.4;t = 4.21, p < 0.001). In the practical skills test, the IT group scored 160.7 +/- 22.4, while the TT group scored 135.8 +/- 25.6 (t = 5.13, p < 0.001). Conclusions The findings of the study indicate a significant advantage of an integrated approach to radiology teaching over conventional methods. The integration of modern technologies into the learning process has been shown to enhance both short- and long-term educational outcomes in medical education. This finding is of practical significance for educational institutions in this field. It is recommended that integrated teaching methods be introduced in order to improve the quality of specialist training. Clinical trial numberNot applicable

关键词： Radiology Educational methods Comprehensive training Simulation training Interactive platforms Artificial intelligence Long-term retention of knowledge

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An Optimization-Based Indoor-Outdoor Seamless Positioning Method Integrating GNSS RTK, PS, and VIO

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IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS 2024年第5期71卷 2889-2893页

作者： Song, Jiangbo Li, Wanqing Duan, Chufeng Wang, Lei Fan, Yiheng Zhu, Xiangwei Sun Yat Sen Univ Sch Syst & Engn Guangzhou 510006 Peoples R China Sun Yat Sen Univ Sch Aeronaut & Astronaut Shenzhen Campus Shenzhen 518107 Peoples R China Sun Yat Sen Univ Sch Informat & Commun Engn Shenzhen Campus Shenzhen 518107 Peoples R China Sun Yat Sen Univ Shenzhen Key Lab Nav & Commun Integrat Shenzhen Campus Shenzhen 518107 Peoples R China Southern Marine Sci & Engn Guangdong Lab Zhuhai Zhuhai 519082 Peoples R China

The integration of global navigation satellite system (GNSS), vision, and inertial can perform positioning in indoor-outdoor transition scenarios. However, in indoor scenes, GNSS signals fail, and the global information of visual-inertial odometry (VIO) is not observable. In this brief, we propose an optimization-based seamless indoor-outdoor positioning method. Specifically, in the factor graph framework, we fuse GNSS, vision, inertial, and pressure sensor (PS) measurements to obtain accurate global positioning information in complex indoor-outdoor transition scenarios. In addition, we construct PS factors by using inertial measurement unit (IMU) forward-backward preintegration technology to eliminate the impact of time delay of PS measurements. Moreover, we incorporate GNSS and PS factors into the covisibility graph marginalization strategy of ORB-SLAM3. Furthermore, in the initialization process, we add the alignment of GNSS-inertial and PS-inertial. Real world experiments demonstrate that the proposed algorithm has better positioning accuracy and robustness than the state-of-the-art visual-inertial algorithms in complex indoor-outdoor scenes such as underground garages and multi-story buildings. To contribute to the community, we open-source the dataset on Github: https://***/SYSU-CPNTLab/GVI-SYSU-Outdoor-Indoor-Dataset.

关键词： Visual-inertial odometry GNSS sensor fusion localization indoor-outdoor seamless positioning

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Class Incremental Learning With Deep Contrastive Learning and Attention Distillation

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IEEE SIGNAL PROCESSING LETTERS 2024年 31卷 1224-1228页

作者： Zhu, Jitao Luo, Guibo Duan, Baishan Zhu, Yuesheng Peking Univ Shenzhen 518055 Peoples R China

Class incremental learning can solve the issue of catastrophic forgetting when the trained model is used to learn a new task in which the model may forget part of previous knowledge learned. The key issue is to alleviate the stability-plasticity dilemma and maintain the balance between preventing old knowledge from being forgotten and learning new knowledge. In this letter, a new class incremental learning method with deep contrastive learning and attention distillation is proposed. The deep contrastive learning can optimize last layer of the model to learn strong-semantic information and the intermediate layers to learn weak-semantic information when new data is coming so that the plasticity can be improved. To ensure a balance between plasticity and stability, a new attention distillation approach is developed to learn and distill the latent attention information of the feature maps and the similarity between different samples. Our analysis and experimental results indicate that the proposed method can improve the learning and memorization ability and the average accuracy of the model compared with the previous methods, and obtain competitive results in class increment scenarios for image classification.

关键词： Task analysis Feature extraction Self-supervised learning Data models Stability criteria Training Image classification Attention information class incremental learning deep contrastive learning knowledge distillation

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Effect of folpet on hypoglycaemia, intestinal microbiota, and drug resistance genes in mice

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BMC MICROBIOLOGY 2025年第1期25卷 1-9页

作者： Cao, Tingting Guo, Yajie Lin, Liangqiang Wang, Dan Liu, Zhiyang Zou, Xuan Ke, Yuebin Lv, Ziquan Shenzhen Ctr Dis Control & Prevent Shenzhen 518055 Peoples R China Sun Yat Sen Univ Affiliated Hosp 8 Shenzhen 518033 Peoples R China

BackgroundFolpet is a nonspecific sulfonamide fungicide widely used to protect crops from mildew. However, the in vivo effects of folpet on glucose metabolism homeostasis, gut microbiota, and abundance of drug resistance genes remain unknown. The purpose of this study was to assess the effects of the pesticide, folpet, on glucose metabolism homeostasis, and folpet-induced changes in the intestinal microbiota and resistance genes in *** were orally administered folpet at 0, 1, 10, and 100 mg/kg body weight/day for 5 weeks. Blood sugar levels in mice were measured after 5 weeks of folpet administration. Metagenomic sequencing and drug resistance gene analyses were performed to explore changes in the abundance of gut microbiota members and drug resistance genes in mice after folpet administration. Correlation analysis was performed using metabolomics to explore the relationship between intestinal microbiota, drug resistance genes, and glucose *** in the folpet group had significantly lower blood glucose levels than those in the control group. The abundance of Atopobium, Libanicoccus, Collinsella, and Parabacteroides in the intestinal microbiota of folpet-treated mice was significantly higher than that in the control group. However, the abundance of Mailhella, Bilophila, Roseburia, and Bacteroides were reduced in folpet-treated mice. Compared with the control group, the abundance of APH6-Ic and AAC6-Ie-APH2-Ia resistance genes in mice treated with folpet significantly increased. The abundance of tetQ, ermE, and BahA resistance genes was significantly reduced after folpet *** is associated with changes in the abundance of gut microbiota in mice and may also affect the abundance of drug-resistance genes and the regulation of blood glucose levels.

关键词： Folpet Intestinal microbiota Resistance genes Metabolome

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Efficiency and precision improvement study on laser dressing shaped convex-arc ceramic diamond wheel

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INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING technology 2025年第3-4期137卷 1103-1116页

作者： Mei, Feng Chen, Genyu Liu, Xuancheng Yu, Genrui Zhou, Wei Hunan Univ Coll Mech & Vehicle Engn Changsha 410082 Peoples R China Hunan Univ Laser Res Inst Changsha 410082 Peoples R China

With the increasing demand for complex, functionally formed parts, there is an increasing demand for processing tools with complex shapes. However, the conventional dressing of shaped grinding wheels to create irregularly shaped parts is still expensive and inefficient. Therefore, a systematic study was conducted on the trimming of shaped ceramic diamond wheels using a laser with a large deflection angle (> 5 degrees). The effects of different laser power and defocus on the ablation of ceramics and diamond were studied by simulation. The effects of different cutting depth and deflection angle on the dressing error and efficiency were studied. The simulation results show that the laser power cannot but the defocus can improve the removal difference between diamond and ceramic binder. With the increase of cutting depth, the dressing efficiency increases, and the quality of the trimmed surface decreases. The reason for the difference in precision between large and small cutting depth is attributed to changes in defocus, so the large-cutting-depth laser trimming with high efficiency can be used in the rough dressing stage. With the increase of deflection angle, the processing efficiency of the laser trimming bevel wheel increases, but the contour PV value increases. Therefore, a large deflection angle can be used for semi-precision dressing of the shaped wheel, and a suitable small deflection angle can be used for precision dressing. The best PV value of the straight contour of the shaped wheel was 10.3 mu m using the method;the size error of the large arc contour was 24 mu m;and the size error of the small arc contour was 17 mu m. The total time required for laser dressing was approximately 3.6 h.

关键词： Large deflection angle Shaped ceramic diamond wheel Cutting depth Dressing efficiency

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Scientific land greening under climate change: Theory, modeling, and challenges

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Advances in Climate Change Research 2024年第5期15卷 894-913页

作者： Jia-Na CHEN Zai-Chun ZHU Sen CAO Peng-Jun ZHAO Pei LIU Da-Jing LI Wei-Min WANG Yue CHEN School of Urban Planning and Design Shenzhen Graduate SchoolPeking UniversityShenzhen 518055China Key Laboratory of Earth Suface System and Human-Earth Relations of Ministry of Natural Resources of China Shenzhen Graduate SchoolPeking University Shenzhen 518055China Guangdong Urban-Rural Planning and Design Research Institute Technology Group Co. Lid.Guangzhou 510290China Shenzhen Ecological and Environmental Monitoring Centerof Guangdong Province Shenzhen 518049China Guangdong Greater Bay Area Change and Comprehensive Treatment of Regional Ecology and EnvironmentNational Observation and Research StationShenzhen 518049China State Environmental Protection Scientific Observation and Research Station for Ecology and Environment of Rapid Urbanization Region Shenzhen 518049.China

Anthropogenic land greening is a vital strategy to combat the global warming ***,the changing external environment and endowment factors may constrain the effectiveness of land *** remains unclear how to quantify and optimize land greening strategies *** article reviewed the theoretical foundations of land greening,pointing out that climate governance and human settlement quality improvement have gradually become the two core objectives of land greening since the 2oth ***-source and multi-scale experimental and observational surveys are important techniques for detecting and evaluating long-term land greening in the context of climate change,especially by forming experimental and observational *** theoretical mechanisms of interactions among climate,humans,and vegetation were also *** modeling approaches,hybrid modeling based on Earth system coupling theory may be the most promising but challenging *** main challenges of scientific land greening were also discussed,including knowledge gaps related to land greening mechanisms,unclear multifaceted effects of land greening,lack of forward-looking quantitative assessment,and difficulties in evaluating synergies and trade-offs among assessment *** on these,a strategic framework was proposed,including systematic observation,mechanism research,expectation assessment,and scientific planning for scientific greening programs in the Guangdong-Hong Kong-Macao Greater Bay *** review underscored the importance of proactively implementing land greening programs and provided guidelines for scientific greening based on cutting-edge theory and methods.

关键词： Land greening Climate change Human-Earth relations Earth system model Sustainable development goals

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A Low-Profile programmable 2-bit Array Based on a Novel Highly Integrated Element

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IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION 2025年第5期73卷 3418-3423页

作者： Xiang, Meng Xiao, Yu Deng, Jinxi Xu, Shiyou Yang, Fan Sun, Houjun Sun Yat Sen Univ Sch Elect & Commun Engn Shenzhen 518107 Peoples R China Tsinghua Univ Dept Elect Engn Beijing 100084 Peoples R China Beijing Inst Technol Beijing Key Lab Millimeter Wave & Terahertz Wave T Beijing 100081 Peoples R China

In this communication, a programmable 2-bit array antenna based on a highly integrated element with low profile and high efficiency is proposed. Based on a ring structure and four PIN diodes, 90 degrees and 180 degrees phase differences can be achieved by changing the resonant dimension and mirroring the states, respectively. The 2-bit element is then obtained by the two methods, and the bias control network for PIN diodes is integrated into the polarization grids. Compared to traditional cascaded phase shifter schemes, the proposed design adopts a new integrated method to simplify the structure, which not only reduces element losses but also simplifies the design of the control section. To further avoid the deterioration of array radiation performance caused by the planar feeding network, its phase and amplitude distributions are optimized by referring to those of the spatial feed in this design. Finally, a low-profile programmable 2-bit array antenna with 8 x 8 elements is designed and fabricated. The measured results indicate that the designed array can reach a peak aperture efficiency of 67% and achieve a 2-D beam scanning range.

关键词： Pins Metals Structural rings Phased arrays Antennas and propagation Apertures Strips PIN photodiodes Electromagnetics Antenna feeds 2-bit high efficiency pin diode planar feeding network programmable

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