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增强相种类对DLP制备氧化硅基复合陶瓷性能的影响
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作者 刘星宇 石张傲 +3 位作者 吴甲民 郑家鑫 郭琳 史玉升 《航空材料学报》 北大核心 2026年第1期100-108,共9页
氧化硅陶瓷因其优异的介电性能与热稳定性,在天线罩材料领域具有广泛应用。然而,传统陶瓷成形工艺难以满足复杂结构构件的制备需求。为提升氧化硅陶瓷的成形质量与力学性能,本工作采用数字光处理(digital light processing,DLP)增材制... 氧化硅陶瓷因其优异的介电性能与热稳定性,在天线罩材料领域具有广泛应用。然而,传统陶瓷成形工艺难以满足复杂结构构件的制备需求。为提升氧化硅陶瓷的成形质量与力学性能,本工作采用数字光处理(digital light processing,DLP)增材制造技术,系统研究不同增强相类型对氧化硅基复合陶瓷性能的影响。以氧化硅为基体,分别引入莫来石颗粒、氮化铝颗粒及氧化铝包覆颗粒作为增强相,制备多组复合陶瓷样品,并对其相组成、显微结构、体积密度及抗弯强度等性能进行表征与分析。结果表明,增强相种类显著影响氧化硅基复合陶瓷中方石英的析出行为及致密化过程。其中,以莫来石颗粒为增强相时,样品综合性能最优,其垂直与水平方向的收缩率分别为8.73%和8.66%,显气孔率为17.44%,体积密度为1.80 g/cm^(3),抗弯强度最高,可达17.94 MPa。 展开更多
关键词 氧化硅陶瓷 数字光处理 增强相 莫来石 力学性能
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大幅面DLP3D打印平台搭建及成形工艺研究
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作者 王亚琪 周宏志 +2 位作者 张焱 刘登科 李文陶 《应用激光》 北大核心 2026年第1期38-46,共9页
针对目前市面上DLP3D打印设备成形幅面较小的问题,以4K UV光机结合伺服电机以及驱动器搭建一台大幅面高精度DLP3D打印设备。采用单因素实验方法和超景深表征手段,以长方体底座、圆锥特征的标准测试件为研究对象进行光固化成形精度试验,... 针对目前市面上DLP3D打印设备成形幅面较小的问题,以4K UV光机结合伺服电机以及驱动器搭建一台大幅面高精度DLP3D打印设备。采用单因素实验方法和超景深表征手段,以长方体底座、圆锥特征的标准测试件为研究对象进行光固化成形精度试验,得到成形最优参数组合为:单层曝光时间4s、分层厚度50μm。为了验证设备的复杂结构成形精度性能,制作口腔上颌牙列,由数字化三维扫描仪测得在±0.3mm公差范围内占比85.54%,满足齿科临床使用标准。所搭建的大幅面DLP3D打印设备成形精度较高,具有较好的工程应用价值。 展开更多
关键词 dlp3D打印设备 成形工艺 单因素实验 上颌牙列 数字化三维扫描
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Call for Papers from Agricultural Products Processing and Storage
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《肉类研究》 北大核心 2026年第4期I0011-I0011,共1页
Agricultural Products Processing and Storage(ISSN 3059-4510,Owner:Hunan Academy of Agricultural Sciences,China.Production and hosting:Springer Nature)is an international,peer-reviewed open access journal with the aim ... Agricultural Products Processing and Storage(ISSN 3059-4510,Owner:Hunan Academy of Agricultural Sciences,China.Production and hosting:Springer Nature)is an international,peer-reviewed open access journal with the aim to offer a platform for the rapid dissemination of significant,novel,and high-impact research in the fields of agricultural product processing science,technology,engineering,and nutrition.Additionally,supplemental issues are curated and published to facilitate in-depth discussions on special topics. 展开更多
关键词 processing Agricultural Products Consumer Demand
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Hot Compression Deformation Behavior and Processing Maps of Mg-Zn-Mn(-Sn)-Ca Alloy
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作者 Chen Xia Zhu Yulong +2 位作者 Liu Quanyi Zhang Dingfei Pan Fusheng 《稀有金属材料与工程》 北大核心 2026年第3期627-635,共9页
The hot compression deformation behavior of Mg-6Zn-1Mn-0.5Ca(ZM61-0.5Ca)and Mg-6Zn-1Mn-2Sn-0.5Ca(ZMT612-0.5Ca)alloys was investigated at deformation temperatures ranging from 250℃to 400℃and strain rates varying from... The hot compression deformation behavior of Mg-6Zn-1Mn-0.5Ca(ZM61-0.5Ca)and Mg-6Zn-1Mn-2Sn-0.5Ca(ZMT612-0.5Ca)alloys was investigated at deformation temperatures ranging from 250℃to 400℃and strain rates varying from 0.001 s^(-1) to 1 s^(-1).The results show that the addition of Sn promotes dynamic recrystallization(DRX),and CaMgSn phases can act as nucleation sites during the compression deformation.Flow stress increases with increasing the strain rate and decreasing the temperature.Both the ZM61-0.5Ca and ZMT612-0.5Ca alloys exhibit obvious DRX characteristics.CaMgSn phases can effectively inhibit dislocation motion with the addition of Sn,thus increasing the peak fl ow stress of the alloy.The addition of Sn increases the hot deformation activation energy of the ZM61-0.5Ca alloy from 199.654 kJ/mol to 276.649 kJ/mol,thus improving the thermal stability of the alloy.For the ZMT612-0.5Ca alloy,the optimal hot deformation parameters are determined to be a deformation temperature range of 350–400℃and a strain rate range of 0.001–0.01 s^(-1). 展开更多
关键词 hot deformation constitutive equation processing map deformation activation energy magnesium alloy
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Call for Papers from Agricultural Products Processing and Storage
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《肉类研究》 北大核心 2026年第1期I0017-I0017,共1页
Agricultural Products Processing and Storage(ISSN 3059-4510,Owner:Hunan Academy of Agricultural Sciences,China.Production and hosting:Springer Nature)is an international,peer-reviewed open access journal with the aim ... Agricultural Products Processing and Storage(ISSN 3059-4510,Owner:Hunan Academy of Agricultural Sciences,China.Production and hosting:Springer Nature)is an international,peer-reviewed open access journal with the aim to offer a platform for the rapid dissemination of signifi cant,novel,and high-impact research in the fi elds of agricultural product processing science,technology,engineering,and nutrition.Additionally,supplemental issues are curated and published to facilitate in-depth discussions on special topics. 展开更多
关键词 NUTRITION SCIENCE open access journal agricultural products processing STORAGE technology ENGINEERING agricultural product
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Source-Text Processing in Xu-Argument-Based Continuation Writing:An Eye-Tracking Study
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作者 Wei Gao Jinyang Li Duanhui Yuan 《Chinese Journal of Applied Linguistics》 2026年第1期21-37,159,共18页
This study investigated the effects of xu-argument-based continuation writing on learners’processing of source texts.Seventy-five participants were randomly assigned to three conditions:(1)continuation writing,(2)sum... This study investigated the effects of xu-argument-based continuation writing on learners’processing of source texts.Seventy-five participants were randomly assigned to three conditions:(1)continuation writing,(2)summary writing,or(3)reading comprehension.Eye-tracking data were collected during reading,measuring early(first fixation duration,first pass duration)and late(go-past time,total fixation duration)eye movements.During writing,source-text rereading was tracked via fixation counts and durations.Results showed that task type did not affect initial lexical access,as first fixation duration showed no group differences.However,both production groups exhibited significantly longer first pass durations than the reading comprehension group.Late measures revealed a gradient pattern:the continuation writing group spent significantly longer gopast time and total fixation duration than the summary writing group,which exceeded the reading comprehension group.This indicates that continuation tasks promoted deeper cognitive engagement during reading.During writing,the continuation writing group spent more time rereading the source text with higher fixation counts than the summary writing group.These findings suggest that continuation writing triggers more intensive reader-text interaction during pre-writing and enhances comprehension-production coupling through sustained attention to input during writing.This study sheds light on the cognitive mechanisms underlying the theoretical and pedagogical value of xu-argument. 展开更多
关键词 xu-argument continuation writing source-text processing EYE-TRACKING
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Microseismic signal processing and rockburst disaster identification:A multi-task deep learning and machine learning approach
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作者 Chunchi Ma Weihao Xu +3 位作者 Xuefeng Ran Tianbin Li Hang Zhang Dongwei Xing 《Journal of Rock Mechanics and Geotechnical Engineering》 2026年第1期441-456,共16页
Underground engineering projects such as deep tunnel excavation often encounter rockburst disasters accompanied by numerous microseismic events.Rapid interpretation of microseismic signals is crucial for the timely id... Underground engineering projects such as deep tunnel excavation often encounter rockburst disasters accompanied by numerous microseismic events.Rapid interpretation of microseismic signals is crucial for the timely identification of rockbursts.However,conventional processing encompasses multi-step workflows,including classification,denoising,picking,locating,and computational analysis,coupled with manual intervention,which collectively compromise the reliability of early warnings.To address these challenges,this study innovatively proposes the“microseismic stethoscope"-a multi-task machine learning and deep learning model designed for the automated processing of massive microseismic signals.This model efficiently extracts three key parameters that are necessary for recognizing rockburst disasters:rupture location,microseismic energy,and moment magnitude.Specifically,the model extracts raw waveform features from three dedicated sub-networks:a classifier for source zone classification,and two regressors for microseismic energy and moment magnitude estimation.This model demonstrates superior efficiency compared to traditional processing and semi-automated processing,reducing per-event processing time from 0.71 s to 0.49 s to merely 0.036 s.It concurrently achieves 98%accuracy in source zone classification,with microseismic energy and moment magnitude estimation errors of 0.13 and 0.05,respectively.This model has been well applied and validated in the Daxiagu Tunnel case in Sichuan,China.The application results indicate that the model is as accurate as traditional methods in determining source parameters,and thus can be used to identify potential geomechanical processes of rockburst disasters.By enhancing the signal processing reliability of microseismic events,the proposed model in this study presents a significant advancement in the identification of rockburst disasters. 展开更多
关键词 Underground engineering Microseismic signal processing Deep learning MULTI-TASK Rockburst identification
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Enhancing Convolution Recurrent Network with Graph Signal Processing:High Suppressive Interference Mitigation
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作者 Guo Pengcheng Yu Miao +1 位作者 Gu Miaomiao Ren Bingyin 《China Communications》 2026年第1期255-272,共18页
In this paper,we propose a novel graph signal processing convolution recurrent network(GSP CRN)for signal enhancement against high suppressive interference(HSI)in wireless communications.GSPCRN consists of the short-t... In this paper,we propose a novel graph signal processing convolution recurrent network(GSP CRN)for signal enhancement against high suppressive interference(HSI)in wireless communications.GSPCRN consists of the short-time graph signal processing(SGSP)approach and a modified convolution recurrent network.Similar to the traditional shorttime time-frequency transformation,SGSP frames the complex-valued communication signal and transforms it to the graph-domain representations,where the connection and weight flexibility of each vertex are fully taken into account.In the presence of HSI,SGSP can extract signal features from new graph-domain dimensions and empower neural networks for weak signal enhancement.Two SGSP methods,adjacency singular value decomposition and implicit graph transformation,are designed to capture relationships among the sampling points in the segmented signals.Simulation results demonstrate that our proposed GSPCRN outperforms existing classic methods in extracting weak signals from the HSI environment.When the interference-to-signal ratio exceeds 27dB,only our proposed GSPCRN can achieve the interference mitigation. 展开更多
关键词 adjacency matrix short-time graph signal processing signal enhancement wireless communications
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A Study on the Role of the Chunking Reading Processing Strategy in Enhancing College Students’Proficiency of ESL Reading
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作者 ZHENG Wenqian NI Jincheng 《Sino-US English Teaching》 2026年第1期23-27,共5页
English reading proficiency is essential for university students in a globalized academic environment,yet many L2 learners encounter challenges,such as limited vocabulary,complex syntax,and unclear text organization,l... English reading proficiency is essential for university students in a globalized academic environment,yet many L2 learners encounter challenges,such as limited vocabulary,complex syntax,and unclear text organization,leading to cognitive overload.Grounded in the Cognitive Load Theory(CLT),this study examines the role of the Chunking Reading Processing Strategy-which integrates fragmented linguistic information into meaningful units at lexical,syntactic,and discourse levels-in alleviating cognitive load and improving reading comprehension.Through a mixed-methods approach,the research investigates how learners at different proficiency levels perceive and apply the chunking strategy,and how such application relates to cognitive load management.The results indicate that higher-proficiency learners employ chunking more frequently and report greater benefits,whereas lower-proficiency learners depend more on instructional support.The study confirms the theoretical and pedagogical value of chunk-based reading instruction and suggests that differentiated,cognitively informed teaching of the chunking strategy can enhance both reading efficiency and strategic awareness among L2 learners. 展开更多
关键词 ESL reading the chunking reading processing strategy cognitive load reading ability
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Data Processing Solutions on Low Signal-to-noise Data in Loess Plateau Area:A Case Study in Ordos Basin,China
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作者 GAO Rongtao CHENG Yun +1 位作者 TANG Ziqi LIU Zhao 《CT理论与应用研究(中英文)》 2026年第1期154-162,共9页
While the Ordos Basin is recognized for its substantial hydrocarbon exploration prospects,its rugged loess tableland terrain has rendered seismic exploration exceptionally challenging[1-3].Persistent obstacles such as... While the Ordos Basin is recognized for its substantial hydrocarbon exploration prospects,its rugged loess tableland terrain has rendered seismic exploration exceptionally challenging[1-3].Persistent obstacles such as complex 3D survey planning,low signal-tonoise ratio raw data,inadequate near-surface velocity modeling,and imaging inaccuracy have long hindered the advancement of seismic exploration across this region.Through a problem-solving approach rooted in geological target analysis,this research systematically investigates the behavioral patterns of nodal seismometer-based high-density seismic acquisition in loess plateau.Tailored advancements in waveform enhancement and depth velocity modelling methodologies have been engineered.Field validations confirm that the optimized workflow demonstrates marked improvements in amplitude preservation and imaging resolution,offering novel insights for future reservoir characterization endeavors. 展开更多
关键词 loess plateau ACQUISITION low signal to noise ratio data processing depth modeling
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Exploring Recovery through Life Narratives in Psychiatric Home-Visit Nursing:A Natural Language Processing Approach Using BERTopic
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作者 Ichiro Kutsuna Masanao Ikeya +2 位作者 Akane Fujii Aiko Hoshino Kazuya Sakai 《International Journal of Mental Health Promotion》 2026年第2期31-47,共17页
Background:In mental health,recovery is emphasized,and qualitative analyses of service users’narratives have accumulated;however,while qualitative approaches excel at capturing rich context and generating new concept... Background:In mental health,recovery is emphasized,and qualitative analyses of service users’narratives have accumulated;however,while qualitative approaches excel at capturing rich context and generating new concepts,they are limited in generalizability and feasible data volume.This study aimed to quantify the subjective life history narratives of users of psychiatric home-visit nursing using natural language processing(NLP)and to clarify the relationships between linguistic features and recovery-related indicators.Methods:We conducted audio-recorded and transcribed semi-structured interviews on daily life verbatim and collected self-report questionnaires(Recovery Assessment Scale[RAS])and clinician ratings(Global Assessment of Functioning[GAF])from Japanese users of psychiatric home-visit nursing.Using the artificial intelligence-based topic-modeling method BERTopic,we extracted topics from the interview texts and calculated each participant’s topic proportions,and then examined associations between topic proportions and recovery-related indicators using Pearson correlation analyses.Results:“School”showed a significant positive correlation with RAS(r=0.39,p=0.05),whereas“Family”showed a significant negative correlation(r=–0.46,p=0.02).GAF was positively correlated with word count(r=0.44,p=0.02)and“Hospital”(r=0.42,p=0.03),and negatively correlated with“Backchannels”(aizuchi)(r=–0.41,p=0.03).Conclusion:The present results suggest that the quantity,quality,and content of narratives can serve as useful indicators of mental health and recovery,and that objective NLP-based analysis of service users’narratives can complement traditional self-report scales and clinician ratings to inform the design of recovery-oriented care in psychiatric home-visit nursing. 展开更多
关键词 Personal recovery life history narratives natural language processing psychiatric home-visit nursing artificial intelligence
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Processing map for oxide dispersion strengthening Cu alloys based on experimental results and machine learning modelling
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作者 Le Zong Lingxin Li +8 位作者 Lantian Zhang Xuecheng Jin Yong Zhang Wenfeng Yang Pengfei Liu Bin Gan Liujie Xu Yuanshen Qi Wenwen Sun 《International Journal of Minerals,Metallurgy and Materials》 2026年第1期292-305,共14页
Oxide dispersion strengthened(ODS)alloys are extensively used owing to high thermostability and creep strength contributed from uniformly dispersed fine oxides particles.However,the existence of these strengthening pa... Oxide dispersion strengthened(ODS)alloys are extensively used owing to high thermostability and creep strength contributed from uniformly dispersed fine oxides particles.However,the existence of these strengthening particles also deteriorates the processability and it is of great importance to establish accurate processing maps to guide the thermomechanical processes to enhance the formability.In this study,we performed particle swarm optimization-based back propagation artificial neural network model to predict the high temperature flow behavior of 0.25wt%Al2O3 particle-reinforced Cu alloys,and compared the accuracy with that of derived by Arrhenius-type constitutive model and back propagation artificial neural network model.To train these models,we obtained the raw data by fabricating ODS Cu alloys using the internal oxidation and reduction method,and conducting systematic hot compression tests between 400 and800℃with strain rates of 10^(-2)-10 S^(-1).At last,processing maps for ODS Cu alloys were proposed by combining processing parameters,mechanical behavior,microstructure characterization,and the modeling results achieved a coefficient of determination higher than>99%. 展开更多
关键词 oxide dispersion strengthened Cu alloys constitutive model machine learning hot deformation processing maps
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Teaching Reform of Chinese Medicine Processing Technology Course under the Integration of Technical and Higher Vocational Education
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作者 Lianfang LI 《Medicinal Plant》 2026年第1期72-77,82,共7页
Against the backdrop of integrated development between technical education and higher vocational education,the teaching of Chinese Medicine Processing Technology courses faces new opportunities and challenges.This pap... Against the backdrop of integrated development between technical education and higher vocational education,the teaching of Chinese Medicine Processing Technology courses faces new opportunities and challenges.This paper analyzes the existing problems in the current teaching of Chinese Medicine Processing Technology courses,discusses the necessity of reforming the teaching model under the context of integration,and proposes the construction of a"Dual-Capability Progression,Six-Dimensional Empowerment"teaching model.The aim is to enhance the teaching quality of Chinese Medicine Processing Technology courses and cultivate high-quality skilled talents in Chinese medicine processing who can meet industry demands. 展开更多
关键词 Technical education Higher vocational education Integrated development Chinese Medicine processing Technology Course Teaching reform
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A Multi-Stage Pipeline for Date Fruit Processing: Integrating YOLOv11 Detection, Classification, and Automated Counting
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作者 Ali S.Alzaharani Abid Iqbal 《Computers, Materials & Continua》 2026年第1期1327-1353,共27页
In this study,an automated multimodal system for detecting,classifying,and dating fruit was developed using a two-stage YOLOv11 pipeline.In the first stage,the YOLOv11 detection model locates individual date fruits in... In this study,an automated multimodal system for detecting,classifying,and dating fruit was developed using a two-stage YOLOv11 pipeline.In the first stage,the YOLOv11 detection model locates individual date fruits in real time by drawing bounding boxes around them.These bounding boxes are subsequently passed to a YOLOv11 classification model,which analyzes cropped images and assigns class labels.An additional counting module automatically tallies the detected fruits,offering a near-instantaneous estimation of quantity.The experimental results suggest high precision and recall for detection,high classification accuracy(across 15 classes),and near-perfect counting in real time.This paper presents a multi-stage pipeline for date fruit detection,classification,and automated counting,employing YOLOv11-based models to achieve high accuracy while maintaining real-time throughput.The results demonstrated that the detection precision exceeded 90%,the classification accuracy approached 92%,and the counting module correlated closely with the manual tallies.These findings confirm the potential of reducing manual labour and enhancing operational efficiency in post-harvesting processes.Future studies will include dataset expansion,user-centric interfaces,and integration with harvesting robotics. 展开更多
关键词 Date fruit cultivation YOLOv11 precision agriculture real-time processing automated fruit counting deep learning agricultural productivity
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LinguTimeX a Framework for Multilingual CTC Detection Using Explainable AI and Natural Language Processing
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作者 Omar Darwish Shorouq Al-Eidi +4 位作者 Abdallah Al-Shorman Majdi Maabreh Anas Alsobeh Plamen Zahariev Yahya Tashtoush 《Computers, Materials & Continua》 2026年第1期2231-2251,共21页
Covert timing channels(CTC)exploit network resources to establish hidden communication pathways,posing signi cant risks to data security and policy compliance.erefore,detecting such hidden and dangerous threats remain... Covert timing channels(CTC)exploit network resources to establish hidden communication pathways,posing signi cant risks to data security and policy compliance.erefore,detecting such hidden and dangerous threats remains one of the security challenges. is paper proposes LinguTimeX,a new framework that combines natural language processing with arti cial intelligence,along with explainable Arti cial Intelligence(AI)not only to detect CTC but also to provide insights into the decision process.LinguTimeX performs multidimensional feature extraction by fusing linguistic attributes with temporal network patterns to identify covert channels precisely.LinguTimeX demonstrates strong e ectiveness in detecting CTC across multiple languages;namely English,Arabic,and Chinese.Speci cally,the LSTM and RNN models achieved F1 scores of 90%on the English dataset,89%on the Arabic dataset,and 88%on the Chinese dataset,showcasing their superior performance and ability to generalize across multiple languages. is highlights their robustness in detecting CTCs within security systems,regardless of the language or cultural context of the data.In contrast,the DeepForest model produced F1-scores ranging from 86%to 87%across the same datasets,further con rming its e ectiveness in CTC detection.Although other algorithms also showed reasonable accuracy,the LSTM and RNN models consistently outperformed them in multilingual settings,suggesting that deep learning models might be better suited for this particular problem. 展开更多
关键词 Arabic language Chinese language covert timing channel CYBERSECURITY deep learning English language language processing machine learning
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Tailoring oxygen vacancies in Ni-doped In_(2)O_(3) for improved thin-film transistor stability and performance via solution processing
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作者 Fakhari Alam Sara Ajmal +3 位作者 Muhammad Asim Shahzad Ghulam Dastgeer Aamir Rasheed Gang He 《Journal of Semiconductors》 2026年第2期61-71,共11页
Doping in thin-film transistors(TFTs) plays a crucial role in tailoring material properties to enhance device performance, making them essential for advanced electronic applications. This study explores the synthesis ... Doping in thin-film transistors(TFTs) plays a crucial role in tailoring material properties to enhance device performance, making them essential for advanced electronic applications. This study explores the synthesis and characterization of TFTs fabricated using nickel(Ni)-doped indium oxide(In_(2)O_(3)) via a wet-chemical approach. The presented work investigates the effect of "Ni" incorporation in In_(2)O_(3) on the structural and electrical transport properties of In_(2)O_(3), revealing that higher "Ni" content decreases the oxygen vacancies, leading to a reduction in leakage current and a forward shift in threshold potential(V_(th)).Experimental findings reveal that Ni In O-based TFTs(with Ni = 0.5%) showcase enhanced electrical performance, achieving mobility of 7.54 cm^(2)/(V·s), an impressive ON/OFF current ratio of ~10^(7), a V_(th) of 6.26 V, reduced interfacial trap states(D_(it)) of 8.23 ×10^(12) cm^(-2) and enhanced biased stress stability. The efficacy of "Ni" incorporation is attributed to the upgraded Lewis acidity, stable Ni-O bond strength, and small ionic radius of Ni. Negative bias illumination stability(NBIS) measurements further indicate that device stability diminishes with shorter light wavelengths, likely due to the activation of oxygen vacancies. These findings validate the solution-processed techniques' potential for future large-scale, low-cost, energy-efficient, and high-performance electronics. 展开更多
关键词 thin-film transistors Ni-doped In_(2)O_(3) solution processing bias illumination stability
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基于节点增强设计的水凝胶晶格DLP打印研究
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作者 石文海 李屹 +2 位作者 李家春 邹中妃 史方涛 《电加工与模具》 北大核心 2025年第4期65-70,共6页
晶格结构因其可调的孔隙率、孔径及强度,在组织工程中备受关注。针对生物相容性好且模量低的甲基丙烯酰化明胶(GelMA)水凝胶,使用数字光处理(DLP)技术打印高孔隙率晶格时,剥离行为易导致结构损伤和断裂,故提出一种节点增强晶格结构的方... 晶格结构因其可调的孔隙率、孔径及强度,在组织工程中备受关注。针对生物相容性好且模量低的甲基丙烯酰化明胶(GelMA)水凝胶,使用数字光处理(DLP)技术打印高孔隙率晶格时,剥离行为易导致结构损伤和断裂,故提出一种节点增强晶格结构的方法,通过数值模拟分析节点尺寸对晶格抗剥离性能的影响。仿真结果表明,节点增强设计能改善应力分布,减小应力集中,显著提高晶格的抗剥离能力。实验结果验证了该方法能实现孔隙率达到90%的GelMA水凝胶晶格结构的光固化成形,拓宽了GelMA晶格孔隙率的打印范围;GelMA晶格的模量可在0.7~40.4 kPa调节,具备更广泛的模量调节范围,为水凝胶晶格结构的增强设计与打印提供了技术参考。 展开更多
关键词 dlp打印 晶格结构 节点增强设计 GelMA水凝胶
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大尺寸陶瓷材料DLP 3D打印双光源协同固化系统模拟与实验研究
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作者 张晓楠 付平 +3 位作者 赵文捷 吴俊飞 郑本禹 徐正本 《陶瓷》 2025年第9期34-37,共4页
笔者针对大尺寸陶瓷材料DLP 3D打印技术中面临的层间结合力不足、初始粘附不可靠等关键技术瓶颈,设计了双光源协同固化系统,构建了双光源电磁场耦合模型,验证了双光源方案电场强度和固化深度相较于单光源显著提升。完成了双光源协同固... 笔者针对大尺寸陶瓷材料DLP 3D打印技术中面临的层间结合力不足、初始粘附不可靠等关键技术瓶颈,设计了双光源协同固化系统,构建了双光源电磁场耦合模型,验证了双光源方案电场强度和固化深度相较于单光源显著提升。完成了双光源协同固化及大尺寸陶瓷样件打印实验,对打印样件进行表面缺陷和力学性能分析,结果表明其在层间结合力与整体强度等方面均优于单光源模式。 展开更多
关键词 大尺寸陶瓷材料 dlp 3D打印 双光源
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不同机型CT机DLP报告值准确性的实验验证
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作者 杨斌 张士才 +2 位作者 霍宪凯 刘振河 王鹏程 《中国辐射卫生》 2025年第2期155-160,共6页
目的 通过比较分析CT机剂量报告中的DLP值与笔形电离室测量的DLP测量值数据,研究CT机DLP报告值的准确性。方法 使用A、B两个CT厂家4台不同探测器排数的CT机及头部体模、笔形电离室进行实验。固定其他扫描参数,设置不同kV、mAs并配对组合... 目的 通过比较分析CT机剂量报告中的DLP值与笔形电离室测量的DLP测量值数据,研究CT机DLP报告值的准确性。方法 使用A、B两个CT厂家4台不同探测器排数的CT机及头部体模、笔形电离室进行实验。固定其他扫描参数,设置不同kV、mAs并配对组合,利用笔形电离室测量各种扫描条件下的DLP值作为DLP测量值,并同时记录该扫描条件下CT机剂量报告中的DLP值作为DLP报告值,最后对所有数据进行统计学分析。结果 DLP报告值与DLP测量值存在一定的差异,A厂家40排CT机ΔDLP绝对值的平均值最小,约为2.526 mGy·cm。4台CT机ΔDLP之间存在差异。DLP报告值、DLP测量值与mAs呈线性关系。结论 4台CT机DLP报告值与DLP测量值之间的误差百分比均符合国家规定标准(15%)。剂量报告中的DLP值可以作为评价受检者在扫描过程中接受辐射剂量的参考,但在做关于辐射剂量方面的研究时,更推荐使用笔形电离室等辐射剂量设备测量的数据作为研究数据。 展开更多
关键词 CT 辐射剂量 dlp CTDI 体模 笔形电离室
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An Unprecedented Efficiency with Approaching 21%Enabled by Additive‑Assisted Layer‑by‑Layer Processing in Organic Solar Cells 被引量:2
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作者 Shuai Xu Youdi Zhang +6 位作者 Yanna Sun Pei Cheng Zhaoyang Yao Ning Li Long Ye Lijian Zuo Ke Gao 《Nano-Micro Letters》 SCIE EI CAS 2025年第2期372-375,共4页
Recently published in Joule,Feng Liu and colleagues from Shanghai Jiaotong University reported a record-breaking 20.8%power conversion efficiency in organic solar cells(OSCs)with an interpenetrating fibril network act... Recently published in Joule,Feng Liu and colleagues from Shanghai Jiaotong University reported a record-breaking 20.8%power conversion efficiency in organic solar cells(OSCs)with an interpenetrating fibril network active layer morphology,featuring a bulk p-in structure and proper vertical segregation achieved through additive-assisted layer-by-layer deposition.This optimized hierarchical gradient fibrillar morphology and optical management synergistically facilitates exciton diffusion,reduces recombination losses,and enhances light capture capability.This approach not only offers a solution to achieving high-efficiency devices but also demonstrates the potential for commercial applications of OSCs. 展开更多
关键词 Organic solar cells Additive-assisted layer-by-layer processing Three-dimensional fibril morphology Bulk p-i-n structure Optical management
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