检索结果-南通市图书馆

Enhancing Relational Triple Extraction in Specific Domains:Semantic Enhancement and Synergy of Large Language Models and Small Pre-Trained Language Models

引用

Computers, Materials & Continua 2024年第5期79卷 2481-2503页

作者： Jiakai Li Jianpeng hu geng Zhang School of Electronic and Electrical Engineering Shanghai University of Engineering ScienceShanghai201620China

In the process of constructing domain-specific knowledge graphs,the task of relational triple extraction plays a critical role in transforming unstructured text into structured *** relational triple extraction models facemultiple challenges when processing domain-specific data,including insufficient utilization of semantic interaction information between entities and relations,difficulties in handling challenging samples,and the scarcity of domain-specific *** address these issues,our study introduces three innovative components:Relation semantic enhancement,data augmentation,and a voting strategy,all designed to significantly improve the model’s performance in tackling domain-specific relational triple extraction *** first propose an innovative attention interaction *** method significantly enhances the semantic interaction capabilities between entities and relations by integrating semantic information fromrelation ***,we propose a voting strategy that effectively combines the strengths of large languagemodels(LLMs)and fine-tuned small pre-trained language models(SLMs)to reevaluate challenging samples,thereby improving the model’s adaptability in specific ***,we explore the use of LLMs for data augmentation,aiming to generate domain-specific datasets to alleviate the scarcity of domain *** conducted on three domain-specific datasets demonstrate that our model outperforms existing comparative models in several aspects,with F1 scores exceeding the State of the Art models by 2.,1.6%,and 0.6%,respectively,validating the effectiveness and generalizability of our approach.

关键词： Relational triple extraction semantic interaction large language models data augmentation specific domains

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Polymer: Non-fullerene acceptor heterojunction-based phototransistor for short-wave infrared photodetection

引用

Nano Research 2024年第4期17卷 3087-3095页

作者： Jing Li Weigang Zhu Yang Han Yanhou geng Wenping hu Key Laboratory of Organic Integrated Circuits of Ministry of Education&Key Laboratory of Molecular Optoelectronic Sciences School of Science&Collaborative Innovation Center of Chemical Science and Engineering(Tianjin)Tianjin UniversityTianjin 300072China Key Laboratory of Organic Integrated Circuits of Ministry of Education&Key Laboratory of Molecular Optoelectronic Sciences School of Materials Science and EngineeringTianjin UniversityTianjin 300072China

It remains full of challenge for extending short-wave infrared(SWIR)spectral response and weak-light detection in the context of broad spectral responses for *** this work,a novel poly(2.5-bis(4-hexyldodecyl)-2.5-dihydro-3,6-di-2.thienyl-pyrrolo[3,4-c]pyrrole-1,4-dione-alt-thiophene)(PDPPT3-HDO):COTIC-4F organic bulk-heterojunction is prepared as active layer for bulk heterojunction ***3-HDO serves as a hole transport material,while COTIC-4F enhances the absorption of SWIR light to 102. *** a result,smooth and connected PDPPT3-HDO film is fabricated by blade coating method and exhibits high hole mobility up to 2.34 cm^(2.·V^(-1)·s^(-1) with a current on/off ratio of 4.72.10^(5) in organic thin film ***3-HDO:COTIC-4F heterojunction phototransistors exhibit high responsivity of 2.80 A·W^(-1) to 900 nm and 815 A·W^(-1) to 102. nm,with fast response time(rise time~2. ms and fall time~100 ms).The photosensitivity of the heterojunction phototransistor improves as the mass ratio of non-fullerene acceptors increases,resulting in an approximately two orders of magnitude enhancement compared to the bare polymer ***,the phototransistor exhibits decent responsivity even under ultra-weak light power of 43μW·cm^(-2. to 102. *** work represents a highly effective and general strategy for fabricating efficient and sensitive SWIR light photodetectors.

关键词： photodetection phototransistor organic semiconductor heterojunction non-fullerene acceptor

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

An improved imaging algorithm for fixed-receiver bistatic SAR

引用

Science china(Information Sciences) 2010年第7期53卷 1461-1469页

作者： geng xupu1,2.3,{2.,2. YAN Honghui2.& WANG YanFei2.1Graduate School of the Chinese Academy of Sciences, beijing 100039, china 2.nstitute of Electronics, Chinese Academy of Sciences, beijing 100190, china 3beijing Institute of Environment Features, beijing 100854, china 1. Graduate School of the Chinese Academy of Sciences Beijing 100039 China2. Institute of Electronics Chinese Academy of Sciences Beijing 100190 China3. Beijing Institute of Environment Features Beijing 100854 China

Based on the signal model of fixed-receiver bistatic SAR, this paper analyzes the characteristics of azimuth-variant, which includes variation of range migration curve and variation of Doppler rate caused by different azimuth position of targets. Then, an extended nonlinear chirp scaling (NLCS) algorithm is proposed, with its flowchart and phase compensation functions being provided. Simulation results show that the algorithm is available for the characteristics of azimuth-variant of fixed-receiver bistatic SAR, and good focused radar images could be acquired.

关键词： synthetic aperture radar (SAR) bistatic SAR fixed-receiver characteristics of azimuth-variant range cell migration correction (RCMC)

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Solid-state NMR study on sodium intercalation at low voltage window for Na_(3)V_(2.(PO_(4))_(3) as an anode

引用

Magnetic Resonance Letters 2024年第2期4卷 40-45页

作者： Yuxin Liao Fushan geng Ming Shen Bingwen hu Shanghai Key Laboratory of Magnetic Resonance State Key Laboratory of Precision SpectroscopySchool of Physics and Electronic ScienceEast China Normal UniversityShanghai200241China

In-situ XRD,^(31)P NMR and ^(2.)Na NMR were used to analyze the interaction behavior of Na_(3)V_(2.(PO_(4))_(3) at low voltage,and then a new intercalation model was *** the transition from Na_(3)V_(2.(PO_(4))_(3) to Na_(4)V_(2.(PO_(4))_(3),Na ions insert into M1,M2.and M3 sites ***,during the transition of Na_(4)V_(2.(PO_(4))_(3)to Na_(5)V_(2.(PO_(4))_(3),Na ions mainly insert into M3 site.

关键词： Na_(3)V_(2.(PO_(4))_(3) Anode Low voltage NMR Sodium ion battery

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Cardiovascular Risk Factors in china

引用

Journal of Geriatric Cardiology 2024年第2期21卷 153-199页

作者： Sheng-Shou hu the Writing Committee of the Report on Cardiovascular Health and Diseases in china Fuwai Hospital National Center for Cardiovascular DiseasesChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijingChina 不详

The Annual Report on Cardiovascular Health and Diseases in china(2.2.) intricate landscape of cardiovascular health in china. This section dissects cardiovascular risk factors in china which including hypertension, dyslipidemia, diabetes mellitus, chronic kidney disease, metabolic syndrome and air pollution. Hypertension prevalence has steadily increased in china,with efforts to control it facing challenges in achieving optimal rates, especially in rural areas. Interventions like salt substitutes and intensive blood pressure control show promise but need improvement. Abnormal lipid levels, indicative of dyslipidemia,have risen significantly, posing a risk for cardiovascular diseases. Despite efforts, many patients struggle to achieve target lipid levels, necessitating improved treatment strategies. Both type 1 and type 2.diabetes mellitus affect millions of adults in china,with long-term complications adding to the disease burden. Early intervention and effective management are crucial to mitigate its impact. Prevalent among older adults, chronic kidney disease is associated with diabetes mellitus, hypertension, and cardiovascular diseases, necessitating comprehensive management approaches. The prevalence of metabolic syndrome, characterized by a cluster of risk factors, has increased in both adults and adolescents, calling for lifestyle modifications and public health interventions. Ambient and household air pollution remain significant environmental risk factors, despite some improvements in air quality. Continued efforts to reduce emissions are essential for mitigating associated health risks. Addressing these risk factors requires a multifaceted approach, including public health initiatives, policy interventions, and individual-level strategies to promote healthy lifestyles and reduce environmental exposures. Surveillance and research efforts are crucial for monitoring trends and developing effective strategies to lessen the burden of cardiovascular diseases in

关键词： landscape adding spite

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A high-performance electromagnetic energy harvester for scavenging ultra-low frequency vibration energy of human foot movement

引用

Science china(Technological Sciences) 2024年第5期67卷 1391-1400页

作者： hu JiaJun QIAN Shuo WU hui hu DongXu NIU LiXin BI XiaoXue ZHANG Jie HOU XiaoJuan geng WenPing MU JiLiang HE Jian CHOU XiuJian Science and Technology on Electronic Test and Measurement Laboratory North University of ChinaTaiyuan030051China School of Software North University of ChinaTaiyuan030051China

In our daily lives,low-frequency kinetic energy primarily manifests as ***,effective harnessing of lowfrequency kinetic energy remains a formidable *** paper proposes a rope-driven rotor that rotates around an axis and consists of an ultra-high-molecular-weight polyethylene(UHMWPE)wire wrapped around a metal *** rotor can convert ultra-low frequency vibration/linear motion into rapid rotation by pressing the top at low frequencies and driving the rope for a quick *** harvester can generate up to 36.2. m W power using a 0.1-mm-diameter UHMWPE wire as the rotor when periodically pressed down to 2. mm at a frequency of 1 Hz.A simple power generation floor is assembled,generating 2..58-m W power with a matching load at a frequency of 1.5 ***,the harvester can increase the charging voltage of a 0.47-F supercapacitor from 0 to 6.8 V within 10 *** addition,the harvester can harvest energy through a light finger press motion,and the energy obtained can also support the continuous operation of multiple electronic devices *** study introduces an effective method for harvesting ultra-low frequency energy and has great prospects in the field of power generation floor and human movement energy harvesting.

关键词： electromagnetic energy harvester rope-shaft coupling structure human motion ultra-low frequency

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Antimony oxides-protected ultrathin Ir-Sb nanowires as bifunctional hydrogen electrocatalysts

引用

Nano Research 2024年第3期17卷 1042-1049页

作者： Bingyan Xu Xuan huang Shangheng Liu Zhiwei hu Cheng-Wei Kao Ting-Shan Chan Hongbo {2. Ying Zhang Xiaoqing huang Country State Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China Max Planck Institute for Chemical Physics of Solids Dresden 01187Germany “National Synchrotron Radiation Research Center” Hsinchu 30076TaiwanChina School of Materials Engineering Changshu Institute of TechnologyChangshu 215500China Institute for Carbon Neutralization College of Chemistry and Materials EngineeringWenzhou UniversityWenzhou 325035China

Developing electrocatalysts with fast kinetics and long-term stability for alkaline hydrogen oxidation reaction(HOR)and hydrogen evolution reaction(HER)is of considerable importance for the industrial production of green and sustainable ***,an ultrathin Ir-Sb nanowires(Ir-Sb NWs)protected by antimony oxides(SbO_(x))was synthesized as an efficient bifunctional catalyst for both HOR and HER under alkaline *** from the much higher mass activities of Ir-Sb nanowires than those of Ir nanowires(Ir NWs)and commercial Pt/C,the SbO_(x) protective layer also contributes to the maintenance of morphology and anti-CO poisoning ability,leading to the long-term cycling performance in the presence of ***,the Ir-Sb NW/SbO_(x) exhibits the highest catalytic activities,which are about 3.5 and 4.8 times to those of Ir NW/C and commercial Pt/C toward HOR,*** work provides that the ultrathin morphology and H_(2.O-occupied Sb sites can exert the intrinsic high activity of Ir and effectively optimize the absorption of OH*both in alkaline HER/HOR electrolysis.

关键词： Ir nanowire amorphous antimony oxides bifunctional mechanism hydrogen evolution reaction hydrogen oxidation reaction

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Interstitial carbon induces enriched Cu^(δ+) sites in Cu_(2.O nanoparticles to facilitate CO_(2. electroreduction to C_(2.) products

引用

Nano Research 2024年第8期17卷 7013-7019页

作者： Haoran Wang Rongbo Sun Peigen Liu Haohui hu Chen Ling Xiao Han Yi Shi Xusheng Zheng {2. Wu Xun Hong Center of Advanced Nanocatalysis(CAN) Department of Applied ChemistryHefei National Laboratory for Physical Sciences at the MicroscaleUniversity of Science and Technology of ChinaHefei 230026China Sinochem Holdings Co Ltd Xiongan New AreaHebei 071700China National Synchrotron Radiation Laboratory(NSRL) University of Science and Technology of ChinaHefei 230029China

The electrochemical CO_(2. reduction reaction(CO_(2.RR)holds significant promise in advancing carbon *** catalysts for the electrochemical CO_(2.RR to multi-carbon(C_(2.))products(e.g.,C_(2.H_(4))under industrial-level current density is urgently needed and ***,we report the Cu_(2.O nanoparticles doped with interstitial carbon atoms(denoted as C-Cu_(2.O NPs)for the conversion of CO_(2. to C_(2.)*** interstitial carbon promotes the C-Cu_(2.O NPs to possess abundant unsaturated Cu–O bonds,leading to a high-density Cu^(δ+)(01)*** obtained C-Cu_(2.O NPs exhibited significant Faradic efficiency(FE)of C_(2.) products approaching 76.9%and a partial current density reaching 615.2.mA·cm^(–2.under an industrial-level current density of 800 mA·cm^(–2..Furthermore,the efficient electrosynthesis of C_(2.H_(4) achieved an FE of 57.4%with a partial current density of 459.2.mA·cm^(–2..In situ electrochemical attenuated total reflection Fourier transform infrared spectroscopy and in situ Raman spectroscopy analyses revealed that C-Cu_(2.O NPs stabilized the intermediate*CO and facilitated C–C coupling,leading to increased selectivity towards C_(2.) products.

关键词： CO_(2. electroreduction C-C coupling interstitial carbon *CO coverage industrial-level current density

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Flexible multilayer MEMS coils and their application in energy harvesters

引用

Science china(Technological Sciences) 2024年第4期67卷 1282-1293页

作者： ZHANG Jie HOU XiaoJuan QIAN Shuo BI XiaoXue hu DongXu LIU JianJun {2. WenPing MU JiLiang HE Jian CHOU XiuJian Science and Technology on Electronic Test and Measurement Laboratory North University of ChinaTaiyuan 030051China School of Software North University of ChinaTaiyuan 030051China

Electromagnetic vibration energy harvesters are promising for the power supply of wireless sensor nodes,small electronic devices,and wearable *** electromagnetic harvesters usually increase output by increasing the size of coils and magnets,limiting the improvement of energy conversion efficiency and power *** this study,multilayer microelectromechanical system(MEMS)coils were prepared using flexible electronics,and their high integration performance in arbitrary space was utilized to greatly improve the utilization of the space magnetic field by the electromagnetic *** core magnet of the generator was magnetically balanced to achieve levitation,which improved the sensitivity and reduced fatigue damage compared with traditional spring *** wound coils on the top and bottom of the magnet and the flexible coils on the sides worked together to improve the energy efficiency and output of the *** output performance of the device with different number distributions was simulated using mathematical models to obtain the optimal structural *** results show that by introducing flexible multilayer MEMS coils on the side surface of the energy harvester,the open-circuit voltage of the energy generators increased from 7 to 10 V by more than 43%.Flexible multilayer MEMS coils can enhance energy conversion rates and possess compact dimensions,making them suitable for integration onto complex *** the vibration energy harvesting system testing,the maximum peak power of the harvester was 7.1 m W at an acceleration of1 g and a resonant frequency of 11 Hz with a resistor of 3.5 kΩinternal ***,a 470μF capacitor can be charged to 3.5 V within 10 s to drive a hygrothermograph to work for more than 80 s and can supply a light bulb *** strategy shows the great potential of vibration-energy-driven electromagnetic generators for powering small electronics in limited spaces.

关键词： electromagnetic harvester mechanical energy harvesting multilayer MEMS coils magnetic levitation overall space magnetic field flexible planar coils

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Pd single atoms cooperate with S vacancies in ZnIn_(2.S_(4) nanosheets for photocatalytic pure-water splitting

引用

Science china Chemistry 2024年第3期67卷 855-861页

作者： Lin Sun huiping Peng Fei Xue Shangheng Liu Zhiwei hu Hongbo {2. Xiaozhi Liu Dong Su Yong Xu Xiaoqing huang State Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China Guangzhou Key Laboratory of Low-Dimensional Materials and Energy Storage Devices Collaborative Innovation Center of Advanced Energy MaterialsSchool of Materials and EnergyGuangdong University of TechnologyGuangzhou 510006China Max Planck Institute for Chemical Physics of Solids Nothnitzer Strasse 40Dresden 01187Germany School of Materials Engineering Changshu Institute of TechnologyChangshu 215500China beijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of SciencesBeijing 100190China Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province(IKKEM) Xiamen 361005China

Photocatalytic water splitting has emerged as a new frontier for converting solar energy to green H_(2. and value-added ***,great challenges still remain for developing efficient photocatalysts for pure water splitting without sacrificial *** this work,we demonstrate that doping hexagonal ZnIn_(2.S_(4)(ZIS) with Pd single atoms(Pd_(0.03)/ZIS) can serve as a highly efficient photocatalyst for pure water splitting to simultaneously produce H_(2. and H_(2.O_(2. without any sacrificial *** from aberration-corrected high-angle annular dark field scanning transmission electron microscopy,X-ray fine spectroscopy,insitu electron paramagnetic resonance and diffuse Fourier transform infrared spectroscopy reveal that doping ZIS with Pd single atoms facilitates the formation of S vacancies(S_(v)),where the photogenerated electrons can transfer to Pd single atoms,as a result of enhanced separation of electron-hole pairs and improved photocatalytic ***,Pd_(0.03)/ZIS displays a stoichiometric ratio of H_(2. and H_(2.O_(2. with the productivity of 1,037.9 and 1,02..4μmol g^(-1)h^(-1),respectively,which has largely outperformed pure ZIS and other reported catalysts for pure water *** work provides an efficient photocatalyst for water splitting to produce H_(2. and H_(2.O_(2.,which may attract rapid interest in materials science,chemistry,and heterogeneous catalysis.

关键词： ZnIn_(2.S_(4) Pd single atom S vacancy pure water splitting H_(2.O_(2.

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：