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High-gain signal-on PEDOT:PSS organic photoelectrochemical transistor biosensing modulated by a MXene/MOFs/NiO Schottky heterojunction

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science China Chemistry 2023年第2期66卷 578-585页

作者： Zheng Li Yi-Tong Xu Jin Hu Ting Wang Fang-Qing Liu Hong Zhou Guang-Xu Chen Peng Lin Wei-Wei Zhao Jing-Juan Xu Hong-Yuan Chen State Key Laboratory of Analytical Chemistry for Life Science School of Chemistry and Chemical EngineeringNanjing UniversityNanjing210023China Shenzhen Key Laboratory of Special Functional Materials&Guangdong Research Center for Interfacial Engineering of Functional Materials College of Materials Science and EngineeringShenzhen UniversityShenzhen518060China Shandong Key Laboratory of Biochemical Analysis College of Chemistry and Molecular EngineeringQingdao University of Science and TechnologyQingdao266042China School of Environment and Energy State Key Laboratory of Luminescent Materials and DevicesGuangdong Provincial Key Laboratory of Atmospheric Environment and Pollution ControlSouth China University of TechnologyGuangzhou510006China

Herein we report a high-gain signal-on poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate)(PEDOT:PSS)organic electrochemical transistor(OECT)biosensing using an accumulation-mode PEDOT:PSS OECT modulated by a light-fueled MXene/MOFs/Ni O Schottky *** such a system,the MXene/MOFs/Ni O Schottky heterojunction exhibited superior gating effect,as it not only enabled the fast-directional charge transfer but also guaranteed the maximal accessibility of the electrolyte to topped 2D MXene with large surface *** linkage with a bi-enzyme cascade system,the quinone derivatives produced by the cascade reaction of alkaline phosphatase(ALP)and tyrosinase(TYR)could serve as effective electron acceptors for the representative Ti_(3)C_(2)/PCN-224/Ni O heterojunction,underpinning an innovative method for sensitive detection of ALP activity with a low detection limit of 0.001 U L^(-1).Remarkably,the as-developed system demonstrated a remarkable current gain as high as near 10^(4),which to our knowledge is the highest one among existing OECT biosensory *** work represents a generic protocol to develop the novel signal-on PEDOT:PSS OECT platform towards biochemical detection and beyond.

关键词： signal-on PEDOT:PSS organic electrochemical transistor biosensing Schottky heterojunction

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Thermo-mechanically coupled compatibility conditions in orthogonal curvilinear coordinates:equivalent temperature variation of initially stressed elastomers

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Applied Mathematics and Mechanics(English Edition) 2025年第3期46卷 423-446页

作者： Mengru ZHANG Mingzhu XU Weiting CHEN Yapu ZHAO State Key Laboratory of Nonlinear Mechanics Institute of MechanicsChinese Academy of SciencesBeijing 100190China School of Engineering Science University of Chinese Academy of SciencesBeijing 100190China

The initial stresses widely exist in elastic *** achieving a continuum stress-free configuration through compatible unloading is desirable,mechanical unloading alone frequently proves insufficient,posing challenges in avoiding virtual stress-free *** this paper,we introduce a novel concept of equivalent temperature variation to counteract the incompatible initial *** focus is on initially stressed cylindrical and spherical elastomers,where we first derive the Saint-Venant,Beltrami-Michell,and Volterra integral conditions in orthogonal curvilinear coordinates using the exterior differential form *** is shown that for any given axially or spherically distributed initial stress,an equivalent temperature variation always ***,we propose two innovative initial stress forms based on the steady-state heat *** introducing an equivalent temperature variation,the initial stress can be released through a compatible thermo-mechanical unloading process,offering valuable insights into the constitutive theory of initially stressed elastic materials.

关键词： initial stress compatibility condition thermal effect orthogonal curvilinear coordinate Ces`aro-Volterra path integral

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Social Media User Geolocation Based on Large Language Models 2nd

Social Media User Geolocation Based on Large Language Model...

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2nd International Conference on Data Security and Privacy Protection, DSPP 2024

作者： Zhang, Meng Luo, Xiangyang Huang, Ningbo Key Laboratory of Cyberspace Situation Awareness of Henan Province Henan Zhengzhou China State Key Laboratory of Mathematical Engineering and Advanced Computing Henan Zhengzhou China

ISBN: (纸本)9789819785391

In the digital age, social media platforms have amassed a wealth of user-generated content, which contains valuable geographic information. However, the irregularities and noise in user-generated text, have led to suboptimal performance in traditional text-based user geolocation methods. We propose a unsupervised framework for user geolocation based on Large Language Models (LLMs), which utilizes the LLMs’ powerful text processing abilities to geolocate users based on user-generated text unsupervisedly. Firstly, preprocess the text using regularization rules and LLM to denoise and normalize user-generated text, thus enhancing data quality. Subsequently, appropriate prompts are designed to guide the knowledgeable LLM in understanding the user text’s geolocating mechanism, thereby profiling users. To refine user geolocation accuracy, five independent positioning iterations are conducted, with the most frequent occurrence identified as the final user location. Through a series of experiments, we have demonstrated the potential of utilizing large language models for processing noisy text and the effectiveness of geolocating users in an unsupervised setting. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2025.

关键词： Large language model Social media Unsupervised user geolocation User-generated text

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Simultaneously Enhanced Strength and Fracture Resistance in HfNbTaTiZr Refractory High-Entropy Alloy at Higher Strain Rate

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金属学报（英文版） 2025年第4期38卷 529-541页

作者： Hong Chen Ruitao Qu Haotian Ma Kexing Song Feng Liu State Key Laboratory of Solidification Processing School of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi'an 710072China Institute of Materials Henan Academy of SciencesZhengzhou 450046China

The effects of strain rate on tensile properties and fracture behavior of HfNbTaTiZr refractory high-entropy alloy(RHEA)were *** the increase of strain rate in the range from 0.0001 to 0.1 s-1,the yield strength increases from 740 to 825 MPa,demonstrating a strain rate sensitivity coefficient of ***,while the uniform elongation dimin-ished with rising strain rates,the fracture elongation of the RHEA remained constant at～43％,suggesting an enhanced non-uniform elongation and an improved resistance to tensile ***-edge notch tension test further proves that the notch toughness increases at elevated loading *** complete work-hardening rate curves were plotted,and the work-hardening ability of the RHEA was found not decreasing significantly after necking,especially at high strain *** fracture of tensile samples across all the strain rates was dominated by void growth and coalesce,with dimples onthe fracture surface being smaller at higher strain *** work reveals an unconventional increase in fracture resistance at higher strain rates,further indicating that ductile RHEAs may possess superior potential for use in structural applications subjected to high strain rate loading.

关键词： Refractory high-entropy alloy HfNbTaTiZr Strain rate sensitivity Tensile property Notch toughness

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Electrochemical Sensor Based on FeMoO4/Multi-Walled Carbon Nanotubes Composites for Ultrasensitive Detection of Promethazine Hydrochloride

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Journal of Analysis and Testing 2025年第2期9卷 283-289页

作者： Si Zeng Deyu Liu Peiyao Zhu Yongmei Hu Fang Xu Haiping Huang Jiangxi Provincial Key Laboratory of Functional Molecular Materials Chemistry School of Chemistry and Chemical EngineeringJiangxi University of Science and Technology Key Laboratory of Testing and Tracing of Rare Earth Products for State Market Regulation Jiangxi University of Science and Technology

A novel electrochemical sensor based on FeMoO4/multi-walled carbon nanotubes （MWNTs） composites was structured and used for ultrasensitive detection of drug promethazine hydrochloride （PMH）.FeMoO4nanomaterial was synthesized using a simple hydrothermal method and loaded with carbon nanotubes through the physical adsorption *** as-synthesized materials were characterized via various *** electrochemical characteristic of FeMoO4/MWNTs was studied with cyclic voltammetry （CV）.Based on the results of electrochemical experiments,the sensor demonstrates excellent electrocatalytic activity toward ***,the constructed sensor has a wider linear response range （0.5-350μM） with a lower limit of detection （0.16μM）.The selectivity,reproducibility,stability,and practical feasibility experiments of the sensor demonstrate its application prospects for the detection of drug PMH.

关键词： Cyclic voltammetry

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Surface chemistry of electrode materials toward improving electrolyte-wettability:A method review

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InfoMat 2024年第11期6卷 31-65页

作者： Lei Zhao Yuanyou Peng Peiyao Dou Yuan Li Tianqi He Fen Ran State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals Department of Polymeric Materials Science and EngineeringSchool of Materials Science and EngineeringLanzhou University of TechnologyLanzhouthe People's Republic of China

The electrolyte-wettability at electrode material/electrolyte interface is a criticalfactor that governs the fundamental mechanisms of electrochemical reactionefficiency and kinetics of electrode materials in practical electrochemicalenergy storage. Therefore, the design and construction of electrode materialsurfaces with improved electrolyte-wettability has been demonstrated to beimportant to optimize electrochemical energy storage performance of electrodematerial. Here, we comprehensively summarize advanced strategies and keyprogresses in surface chemical modification for enhancing electrolytewettabilityof electrode materials, including polar atom doping by post treatment,introducing functional groups, grafting molecular brushes, and surfacecoating by in situ reaction. Specifically, the basic principles, characteristics,and challenges of these surface chemical strategies for improving electrolytewettabilityof electrode materials are discussed in detail. Finally, the potentialresearch directions regarding the surface chemical strategies and advancedcharacterization techniques for electrolyte-wettability in the future are *** review not only insights into the surface chemical strategies forimproving electrolyte-wettability of electrode materials, but also provides strategicguidance for the electrolyte-wettability modification and optimization ofelectrode materials in pursuing high-performance electrochemical energy storagedevices.

关键词： chemical modification electrochemical energy storage electrode materials electrode/electrolyte Interface surface chemistry

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Sparse-view neutron CT 3D image reconstruction algorithm based on split Bregman method

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Nuclear science and Techniques 2024年第9期35卷 41-55页

作者： Teng-Fei Zhu Yang Liu Zhi Luo Xiao-Ping Ouyang School of Nuclear Science and Engineering North China Electric Power UniversityBeijing 102206China State Key Laboratory of Nuclear Resources and Environment East China University of TechnologyNanchang 330013China State Key Laboratory of Intense Pulsed Radiation Simulation and Effect Xi’an 710024China

As a complement to X-ray computed tomography(CT),neutron tomography has been extensively used in nuclear engineer-ing,materials science,cultural heritage,and industrial *** of the attenuation matrix for neutron tomography with a traditional analytical algorithm requires hundreds of projection views in the range of 0°to 180°and typically takes several hours to *** a low time-resolved resolution degrades the quality of neutron *** the number of projection acquisitions is an important approach to improve the time resolution of images;however,this requires efficient reconstruction ***,sparse-view reconstruction algorithms in neutron tomography need to be *** this study,we investigated the three-dimensional reconstruction algorithm for sparse-view neu-tron CT *** enhance the reconstructed image quality of neutron CT,we propose an algorithm that uses OS-SART to reconstruct images and a split Bregman to solve for the total variation(SBTV).A comparative analysis of the performances of each reconstruction algorithm was performed using simulated and actual experimental *** to the analyzed results,OS-SART-SBTV is superior to the other algorithms in terms of denoising,suppressing artifacts,and preserving detailed structural information of images.

关键词： Neutron CT OS-SART Sparse-view 3D reconstruction Split Bregman Total variation

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Interfacial modulation of nano Li_(7)La_(3)Zr_(2)O_(12) composite electrolytes prepared by solvent-free method

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Green Energy & Environment 2025年第3期10卷 528-536页

作者： Qigao Han Yaqing Guo Fuhe Wang Xuechun Lou Fengqian Wang Jun Zhong Jinqiao Du Jie Tian Weixin Zhang Shun Tang Shijie Cheng Yuancheng Cao Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhan430074China State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhan430074China Shenzhen Power Supply Co.Ltd. Shenzhen518001China

Solid-state batteries(SSBs) with high safety are promising for the energy fields,but the development has long been limited by machinability and interfacial ***,self-supporting,flexible Nano LLZO CSEs are prepared with a solvent-free method at 25℃.The 99.8 wt% contents of Nano LLZO particles enable the Nano LLZO CSEs to maintain good thermal stability while exhibiting a wide electrochemical window of 5.0 V and a high Li~+ transfer number of *** mean modulus reaches 4376 *** from the interfacial modulation,the Li|Li symmetric batteries based on the Nano LLZO CSEs show benign stability with lithium at the current densities of 0.1 mA cm^(-2),0.2 mA cm^(-2),and 0.5 mA cm^(-2).In addition,the Li|LiFePO_(4)(LFP) SSBs achieve favorable cycling performance:the specific capacity reaches128.1 mAh g^(-1) at 0.5 C rate,with a capacity retention of about 80% after 600 *** the further tests of the LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2)(NCM811) cathodes with higher energy density,the Nano LLZO CSEs also demonstrate good compatibility:the specific capacities of NCM811-based SSBs reach 177.9 mAh g^(-1) at 0.5 C rate,while the capacity retention is over 96% after 150 ***,the Li|LFP soft-pack SSBs verify the safety characteristics and the potential for application,which have a desirable prospect.

关键词： Solvent-free method Nano LLZO CSEs Interfacial modulation Cycling performance Safety characteristics

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Error field penetration in J-TEXT tokamak based on two-fluid drift-MHD model

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Chinese Physics B 2024年第4期33卷 545-551页

作者：王文徐涛张仪 the J-TEXT team State Key Laboratory of Advanced Electromagnetic Technology International Joint Research Laboratory of Magnetic Confinement Fusion and Plasma PhysicsSchool of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhan 430074China

An externally generated resonant magnetic perturbation can induce complex non-ideal MHD responses in their resonant *** have studied the plasma responses using Fitzpatrick's improved two-fluid model and program *** calculated the error field penetration threshold for *** addition,we find that the island width increases slightly as the error field amplitude increases when the error field amplitude is below the critical penetration ***,the island width suddenly jumps to a large value because the shielding effect of the plasma against the error field disappears after the *** scanning the natural mode frequency,we find that the shielding effect of the plasma decreases as the natural mode frequency ***,we obtain the m/n=2/1 penetration threshold scaling on density and temperature.

关键词： plasma responses drift-MHD model error field penetration

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A machine learning-based strategy for predicting the mechanical strength of coral reef limestone using X-ray computed tomography

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Journal of Rock Mechanics and Geotechnical engineering 2024年第7期16卷 2790-2800页

作者： Kai Wu Qingshan Meng Ruoxin Li Le Luo Qin Ke ChiWang Chenghao Ma State Key Laboratory of Geomechanics and Geotechnical Engineering Institute of Rock and Soil MechanicsChinese Academy of SciencesWuhan430071China University of Chinese Academy of Sciences Beijing100049China State Key Laboratory of Water Resources and Hydropower Engineering Science Institute of Engineering Risk and Disaster PreventionWuhan UniversityWuhan430072China

Different sedimentary zones in coral reefs lead to significant anisotropy in the pore structure of coral reef limestone(CRL),making it difficult to study mechanical *** X-ray computed tomography(CT),112 CRL samples were utilized for training the support vector machine(SVM)-,random forest(RF)-,and back propagation neural network(BPNN)-based models,***,the machine learning model was embedded into genetic algorithm(GA)for parameter optimization to effectively predict uniaxial compressive strength(UCS)of *** indicate that the BPNN model with five hidden layers presents the best training effect in the data set of *** SVM-based model shows a tendency to overfitting in the training set and poor generalization ability in the testing *** RF-based model is suitable for training CRL samples with large *** of Pearson correlation coefficient matrix and the percentage increment method of performance metrics shows that the dry density,pore structure,and porosity of CRL are strongly correlated to ***,the P-wave velocity is almost uncorrelated to the UCS,which is significantly distinct from the law for homogenous *** addition,the pore tensor proposed in this paper can effectively reflect the pore structure of coral framework limestone(CFL)and coral boulder limestone(CBL),realizing the quantitative characterization of the heterogeneity and anisotropy of *** pore tensor provides a feasible idea to establish the relationship between pore structure and mechanical behavior of CRL.

关键词： Coral reef limestone(CRL) Machine learning Pore tensor X-ray computed tomography(CT)

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