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A compact model for transition metal dichalcogenide field effect transistors with effects of interface traps

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Science China(Information Sciences) 2021年第4期64卷 174-176页

作者： Yifei XU Weisheng LI dongxu fan Yi SHI Hao QIU Xinran WANG National Laboratory of Solid State Microstructures School of Electronic Science and Engineering Collaborative Innovation Center of Advanced MicrostructuresNanjing University

Dear editor,Two-dimensional transition metal dichalcogenide （TMD）materials, such as molybdenum disulphide （MoS2）, are considered as promising channel candidates in field effect transistors （FETs） for future gene... 详细信息

关键词： compact model field effect transistor (FET) transition metal dichalcogenide (TMD) MoS2 interface traps

Hollow Ni Mo-based nitride heterojunction with super-hydrophilic/aerophobic surface for efficient urea-assisted hydrogen production

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Journal of Energy Chemistry 2024年第8期95卷 428-439,I0009页

作者： Yuying fan Ying Gu dongxu Wang Yanqing Jiao Aiping Wu Chungui Tian Key Laboratory of Functional Inorganic Material Chemistry Ministry of Education of the People’s Republic of ChinaHeilongjiang UniversityHarbin 150080HeilongjiangChina College of Chemistry Chemical Engineering and Resource UtilizationNortheast Forestry UniversityHarbin 150040HeilongjiangChina

Hydrogen evolution reaction(HER)and urea oxidation reaction(UOR)are key reactions of the watercycling associated catalytic process/*** design of catalysts with a super-hydrophilic/aerophobic structure and optimized electron distribution holds great ***,we have designed a threedimensional(3D)hollow Ni/NiMoN hierarchical structure with arrayed-sheet surface based on a onepot hydrothermal route for efficient urea-assisted HER based on a simple hydrothermal *** Ni/NiMoN catalyst exhibits super-hydrophilic/aerophobic properties with a small droplet contact angle of 6.07°and an underwater bubble contact angle of 155.7°,thus facilitating an escape of bubbles from the *** functional theory calculations and X-ray photoelectron spectroscopy results indicate the optimized electronic structure at the interface of Ni and NiMoN,which can promote the adsorption/desorption of reactants and *** virtues combining with a large specific surface area endow Ni/NiMoN with efficient catalytic activity of low potentials of 25 mV for HER and 1.33 V for UOR at10 mA cm^(-2).The coupled HER and UOR system demonstrates a low cell voltage of 1.42 V at 10 mA cm^(-2),which is approximately 209 mV lower than water electrolysis.

关键词： Hydrogen evolution Transition metal nitrides Hollow heterojunctions Urea electrooxidation Super hydrophilic/aerophobic

Research on the Division of Small Layers of the Yan’an Group in the Western District of Mahuang Mountain

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Open Journal of Yangtze Oil and Gas 2021年第4期6卷 175-190页

作者： dongxu fan Shucheng Tan Yunnan University Kunming China

To supplement, adjust and improve the division plan of crude oil strata in the west of Mahuangshan Mountain. Combining well logging, core, and drilling analysis and testing data, Petrel software was utilized to classify and compare the 10 layers of the Yan’an Formation. Draw 6 “net-like” skeleton profiles for Ningdong No. 2 and No. 3 wells, involving 31 wells. On the basis of the large-layer strata division, Yan 8 and Yan 9 sections are divided and compared;five “net-like” skeleton profiles were drawn in the 5 well, involving 16 wells. On the basis of the large-layer division, the small-layer division and comparison were performed by Yan 8 and Yan 9. The results show that the Yan 8 oil layer is divided into two stratigraphic units, and Yan 8 and Yan 82, and the Yan 9 oil layer is divided into two stratigraphic units, Yan 91 and Yan 92;the Yan 2 layer in the 2 and 3 well blocks of Ningdong is in the marker layer. The top of the coal seam, Yan 8 layers in the Ningdong 5 well area is on the top of the auxiliary marker seam. The fine division of small layers into tiny layers of sedimentary microfacies, reservoir heterogeneity, development dynamic analysis, remaining oil distribution and other studies provide indispensable data.

关键词： Small Layer Small Layer Division Small Layer Contrast

Kinetically and thermodynamically expediting elementary steps via high-valence Cr-incorporated of nickel selenide for water electrolysis

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Nano Research 2024年第3期17卷 1199-1208页

作者： Huafeng fan dongxu Jiao Jinchang fan Dewen Wang Bilal Zaman Wei Zhang Lei Zhang Weitao Zheng Xiaoqiang Cui State Key Laboratory of Automotive Simulation and Control School of Materials Science and EngineeringKey Laboratory of Automobile Materials of MOEJilin Provincial International Cooperation Key Laboratory of High-Efficiency Clean Energy MaterialsElectron Microscopy CenterJilin UniversityChangchun 130012China College of Chemistry Jilin UniversityChangchun 130012China

Designing high-performance electrocatalysts toward hydrogen evolution reaction(HER)and oxygen evolution reaction(OER)is essential to reduce the activation barrier and optimize free adsorption energy of reactive ***,we report that incorporating high-valence Cr into NiSe_(2)(Cr_(x)Ni_(1-x)Se_(2))kinetically and thermodynamically expedites elementary steps of both HER and *** as-prepared Cr_(0.05)Ni_(0.95)Se_(2) catalyst displays excellent HER and OER activities,with low overpotentials of 89 and 272 mV at the current density of 10 mA·cm^(-2)(j10),respectively,and remains stable during operation for 30 h.A low cell voltage of only 1.59 V is required to drive j10 in alkaline *** situ Raman spectroscopy reveals that Cr incorporation facilitates the formation of NiOOH active species during the OER ***,theoretical explorations demonstrate that high-valence Cr incorporation efficiently accelerates water dissociation kinetics and improves H*adsorption during HER process,lowering the activation barrier of OER and optimizing the adsorption energy of oxygen-based intermediate,thus kinetically and thermodynamically enhancing the intrinsic performance of NiSe_(2) for over water *** strategy provides a new horizon to design transition metal based electrocatalysts in the clean energy field.

关键词： nickel selenide electrocatalytic water splitting high-valence Cr density functional theory(DFT)calculation

Synergistic Ru/RuO_(2) heterojunctions stabilized by carbon coating as efficient and stable bifunctional electrocatalysts for acidic overall water splitting

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Nano Research 2024年第8期17卷 6931-6939页

作者： Man Wu Yuying fan Yang Huang dongxu Wang Ying Xie Aiping Wu Chungui Tian Key Laboratory of Functional Inorganic Material Chemistry Ministry of Education of the People’s Republic of ChinaHeilongjiang UniversityHarbin 150080China

The development of highly active and stable acidic water oxidation electrocatalysts is of great significant for promoting the industrial application of proton exchange membrane ***-based catalysts have broad application prospects in acidic water oxidation,but their limitations in stability and activity hinder their further ***,a nitrogen-doped carbon(NC)coated porous Ru/RuO_(2) heterojunctional hollow sphere(Ru/RuO_(2)/NC)is designed as high-active and stable bifunctional electrocatalyst for acidic oxygen evolution reaction(OER)and hydrogen evolution reaction(HER).In synthesis,the key is to use mesoporous polydopamine spheres as a template for forming hollow spheres,a source of NC coating and a reducing agent for forming Ru/RuO_(2) *** Ru/RuO_(2) heterojunction adjusts the electronic structure of Ru active sites,optimizing the adsorption of intermediate ***,the NC coating and the interaction between NC and Ru/RuO_(2) effectively prevent Ru from over-oxidation and *** porous hollow structure provides more exposed active sites and promotes mass ***,Ru/RuO_(2)/NC exhibits outstanding OER and HER performance with low overpotentials of 211 and 32 mV at 10 mA·cm^(−2),respectively,and shows excellent *** acid water splitting electrolyzer,based on the bifunctional Ru/RuO_(2)/NC,requires low cell voltages of 1.46 and 1.76 V at 10 and 100 mA·cm^(−2),respectively,with good stability for over 100 h operation,surpassing Pt/C||RuO_(2) and most of the reported catalysts.

关键词： hollow heterojunction bifunctional electrocatalysts oxygen evolution hydrogen evolution acidic water splitting

Dual-responsive supramolecular photodynamic nanomedicine with activatable immunomodulation for enhanced antitumor therapy

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Acta Pharmaceutica Sinica B 2024年第2期14卷 765-780页

作者： Siqin He Lulu Wang dongxu Wu fan Tong Huan Zhao Hanmei Li Tao Gong Huile Gao Yang Zhou Key Laboratory of Tropical Biological Resources of Ministry of Education School of Pharmaceutical SciencesHainan UniversityHaikou 570200China Key Laboratory of Drug-Targeting and Drug Delivery System West China School of PharmacySichuan UniversityChengdu 610041China Revvity Inc. WalthamMA 02451USA School of Food and Biological Engineering Chengdu UniversityChengdu 610106China

A major challenge facing photodynamic therapy(PDT) is that the activity of the immuneinduced infiltrating CD8^(+)T cells is subject to the regulatory T lymphocytes(Tregs), leaving the tumor at risk of recurrence and metastasis after the initial ablation. To augment the antitumor response and reprogram the immunosuppressive tumor microenvironment(TME), a supramolecular photodynamic nanoparticle(DACss) is constructed by the host-guest interaction between demethylcantharidin-conjugated β-cyclodextrin(DMC-CD) and amantadine-terminated disulfide-conjugated FFVLGGGC peptide with chlorin e6 decoration(Ad-ss-pep-Ce6) to achieve intelligent delivery of photosensitizer and immunomodulator for breast cancer treatment. The acid-labile β-carboxamide bond of DMC-CD is hydrolyzed in response to the acidic TME, resulting in the localized release of DMC and subsequent inhibition of *** guest molecule Ad-ss-pep-Ce6 can be cleaved by a high level of intracellular GSH, reducing photosensitizer toxicity and increasing photosensitizer retention in the tumor. With a significant increase in the CTL/Treg ratio, the combination of Ce6-based PDT and DMC-mediated immunomodulation adequately achieved spatiotemporal regulation and remodeling of the TME, as well as improved primary tumor and in situ lung metastasis suppression with the aid of PD-1 antibody.

关键词： Photodynamic therapy Immunosuppressive microenvironment Immunomodulator Dual-responsive Supramolecularassembly Checkpointblockade

小秦岭西峪-桐峪金矿矿床物质组分及金赋存状态研究

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西北地质 2023年第1期56卷 254-265页

作者：范东旭夏元鹏云南大学地球科学学院云南昆明650504 陕西矿业开发工贸有限公司陕西西安710054

在野外工作的基础上,笔者通过对小秦岭金矿田中西峪-桐峪金矿光薄片鉴定、化学成分分析、电子探针分析等,查明了该矿(带)共有11条含金构造带,主要赋存于太华群大月坪组和于洞沟组,矿床赋矿岩性为黄铁矿-多金属硫化物石英脉、多金属硫化... 详细信息

在野外工作的基础上,笔者通过对小秦岭金矿田中西峪-桐峪金矿光薄片鉴定、化学成分分析、电子探针分析等,查明了该矿(带)共有11条含金构造带,主要赋存于太华群大月坪组和于洞沟组,矿床赋矿岩性为黄铁矿-多金属硫化物石英脉、多金属硫化物铁白云石石英脉和蚀变岩,矿石构造主要为团块状、浸染状、脉状、网脉状、星散(星点状)状、条带状构造。载金矿物主要为黄铁矿,次为黄铜矿、方铅矿和磁黄铁矿,脉石矿物主要为石英,其次为绢云母。金矿物以独立矿物形式存在,以粒间-裂隙金为主,粒度大多为0.16~0.32 mm,矿石的结构构造有利于矿物的解离。本区金矿成矿作用主要为热液成矿期,可分为金-黄铁矿-石英阶段、金-黄铁矿-多金属硫化物-石英阶段和黄铁矿-磁黄铁矿-碳酸盐阶段。

关键词：物质组分金赋存状态西峪-桐峪金矿矿床小秦岭陕西

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基于可信细粒度对齐的多模态方面级情感分析

计算机科学 2023年第12期50卷 246-254页

作者：范东旭过弋华东理工大学信息科学与技术学院上海200237 大数据流通与交易技术国家工程实验室-商业智能与可视化技术研究中心上海200436 上海大数据与互联网受众工程技术研究中心上海200072

基于方面的多模态情感分析任务(Multimodal Aspect-Based Sentiment Analysis,MABSA),旨在根据文本和图像信息识别出文本中某特定方面词的情感极性。然而,目前主流的模型并没有充分利用不同模态之间的细粒度语义对齐,而是采用整个图像... 详细信息

基于方面的多模态情感分析任务(Multimodal Aspect-Based Sentiment Analysis,MABSA),旨在根据文本和图像信息识别出文本中某特定方面词的情感极性。然而,目前主流的模型并没有充分利用不同模态之间的细粒度语义对齐,而是采用整个图像的视觉特征与文本中的每一个单词进行信息融合,忽略了图像视觉区域和方面词之间的强对应关系,这将导致图片中的噪声信息也被融合进最终的多模态表征中,因此提出了一个可信细粒度对齐模型TFGA(MABSA Based on Trusted Fine-grained Alignment)。具体来说,使用FasterRCNN捕获到图像中包含的视觉目标后,分别计算其与方面词之间的相关性,为了避免视觉区域与方面词的局部语义相似性在图像文本的全局角度不一致的情况,使用置信度对局部语义相似性进行加权约束,过滤掉不可靠的匹配对,使得模型重点关注图片中与方面词相关性最高且最可信的视觉局域信息,降低图片中多余噪声信息的影响;接着提出细粒度特征融合机制,将聚焦到的视觉信息与文本信息进行充分融合,以得到最终的情感分类结果。在Twitter数据集上进行实验,结果表明,文本与视觉的细粒度对齐对方面级情感分析是有利的。

关键词：方面级情感分析多模态细粒度对齐情感分析自然语言处理

Toward Establishing a Low-cost UAV Coordinated Carbon Observation Network(LUCCN):First Integrated Campaign in China

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Advances in Atmospheric Sciences 2024年第1期41卷 1-7页

作者： dongxu YANG Tonghui ZHAO Lu YAO Dong GUO Meng fan Xiaoyu REN Mingge LI Kai WU Jing WANG Zhaonan CAI Sisi WANG Jiaxu GUO Liangfu CHEN Yi LIU Carbon Neutrality Research Center(CNRC) Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China Key Laboratory of Middle Atmospheric Physics and Global Environment Observation(LAGEO) Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China State Key Laboratory of Remote Sensing Science Aerospace Information Research InstituteChinese Academy of SciencesBeijing 100101China National Remote Sensing Center of China Beijing 100036China The Administrative Center for China’s Agenda 21 Beijing 100862China

In this study,we introduce our newly developed measurement-fed-perception self-adaption Low-cost UAV Coordinated Carbon Observation Network(LUCCN)*** LUCCN primarily consists of two categories of instruments,including ground-based and UAV-based in-situ *** use the GMP343,a low-cost non-dispersive infrared sensor,in both ground-based and UAV-based *** first integrated measurement campaign took place in Shenzhen,China,4 May *** the campaign,we found that LUCCN’s UAV component presented significant data-collecting advantages over its ground-based counterpart owing to the relatively high altitudes of the point emission sources,which was especially obvious at a gas power plant in *** emission flux was calculated by a crosssectional flux(CSF)method,the results of which differed from the Open-Data Inventory for Anthropogenic Carbon dioxide(ODIAC).The CSF result was slightly larger than others because of the low sampling rate of the whole emission cross *** LUCCN system will be applied in future carbon monitoring campaigns to increase the spatiotemporal coverage of carbon emission information,especially in scenarios involving the detection of smaller-scale,rapidly varying sources and sinks.

关键词： CO_(2) measurement networks power station carbon emission cross-sectional flux method