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pH- and near-infrared light-responsive,biomimetic hydrogels from aqueous disp.r.ions of carbon nanotubes

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Nano research 2024年第4期17卷 3120-3129页

作者： Lulin hu Xinxin Yu Jingcheng Hao Lu xu Shandong Laboratory of Yantai Advanced Materials and Green Manufacturing Yantai 264000China State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000China Yantai Center for Food and Drug Control Yantai 264000China Key Laboratory of Colloid and Interface Chemistry&Key Laboratory of Special Aggregated Materials Shandong UniversityJinan 250100China

Owing to their low flexibility,poor processability and a lack of responsiveness,inorganic materials are usually non-ideal for constructing a living ***,to date,lifelike materials with structural hierarchies and adaptive prop.r.ies usually rely on light and soft organic molecules,although few exceptions have been acquired using two-dimensional(2D)inorganic ***,with a systematic study on the gelation behavior of carbon-based 0D quantum dots,1D nanotubes,and 3. fullerenes,we find that acidified 1D carbon nanotubes(CNTs)can serve as an alternative building block for fabricating p.r.ly inorganic biomimetic soft *** as-prep.r.d CNT gels exhibit not only a pH-or photothermal-triggered mechanical and tribological adaptivity,which allows them to simulate the behavior of sea cucumbers,peacock mantis shrimps,and mammalian muscles or cortical bones,but also a unique damping prop.r.y that is similar to spider’s cuticular *** high elasticity,effective lubrication,excellent biocompatibility,and controllable friction and wear also allow them to function as a new type of smart lubricants,whose tribological prop.r.ies can be regulated either by its internal pH changes or spatiotemp.r.lly by near-infrared(NIr)light irradiations,free of any toxic and flammable base oils or additives.

关键词： biomimetic hydrogels carbon nanotubes(CNTs) mechanical and tribological adaptivity pH-and near-infrared(NIr)light responsiveness switchable lubrication

Effect of samarium doping on the activity and sulfur resistance of Ce/MnFeO_(x) catalyst for low-temp.r.ture selective catalytic reduction of NO_(x) by ammonia

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Chinese Journal of Chemical Engineering 2024年第7期71卷 272-282页

作者： Qiyao Zhang Shuangshuang Zhang xu hu Yongmin huang Key Laboratory of Specially Functional polymeric Materials and related Technology School of Chemistry and Molecular EngineeringEast China University of Science and TechnologyShanghai 200237China

The self-made MnFeO_(x) catalysts doped with cerium and samarium were prep.r.d by impregnation method for low-temp.r.ture selective catalytic reduction(SCr)by *** this work,the surface prop.r.ies of the series of MnFe-based catalysts were *** results indicate Sm-modified catalyst have sup.r.or low-temp.r.ture SCr activity;NO_(x) conversion maintained at nearby to 100%at 90℃ to 240℃.In addition,The N_(2) selectivity of Sm doping remains above 80%in the range of 60℃ to 150℃.In SO_(2) poisoning test,the NO_(x) conversion can be remained>90%after 10 h of *** XpS,NH_(3.-TpD and H_(2)-Tpr results show the catalyst with Sm doping enhances the acid sites and oxidation catalytic sites of mixed oxides serves for improving oxygen vacancies and transfer *** situ diffuse reflaxions infrared Fourier transformations spectroscopy(DrIFTS)results show that NO_(x) is more easily adsorbed on the surface after Sm doping,which provided favorable conditions for the NH_(3.-SCr reaction to *** reaction at the catalyst surface will follow the L-H reaction mechanism by transient reaction test.

关键词： SCr Sm doping Catalyst Sulfur resistance In situ DrIFTS Selectivity

Design,prep.r.tion,and characterization of a novel ZnO/CuO/Al energetic diode with dual functionality:Logic and destruction

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Defence Technology（防务技术） 2024年第4期34卷 57-68页

作者： Jialu Yang Jiaheng hu Yinghua Ye Jianbing xu Yan hu ruiqi Shen school of Chemistry and Chemical Engineering Nanjing University of Science and TechnologyNanjing 210094China Micro-Nano Energetic Devices Key Laboratory of MIIT Nanjing 210094China Institute of Space propulsion Nanjing University of Science and TechnologyNanjing 210094China

Self-destructing chips have promising applications for securing *** pap.r.proposes a new concept of energetic diodes for the first time,which can be used for self-destructive chips.A simple two-step electrochemical deposition method is used to prep.r. ZnO/CuO/Al energetic diode,in which N-type ZnO and p-type CuO are constricted to a pN *** pap.r.comprehensively discusses the material prop.r.ies,morphology,semiconductor characteristics,and exploding p.r.ormances of the energetic *** results show that the energetic diode has typical rectification with a turn-on voltage of about 1.78 V and a reverse leakage current of about 3.10^(-4)*** a constant voltage of 70 V loads to the energetic diode in the forward direction for about 0.14 s or 55 V loads in the reverse direction for about 0.17 s,the loaded power can excite the energetic diode exploding and the current rises to about100 *** to the unique p.r.ormance of the energetic diode,it has a double function of rectification and *** energetic diode can be used as a logic element in the normal chip to complete the regular op.r.tion,and it can release energy to destroy the chip accurately.

关键词： Energetic diode ZnO—CuO—Al thermite ZnO/CuO pN junction Electrical explosion p.r.ormance Self-destructing chips

Normalized and self-normalized Cramér-type moderate deviations for the Euler-Maruyama scheme for the SDE

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Science China Mathematics 2024年第8期67卷 1865-1880页

作者： Xiequan Fan Haijuan hu Lihu xu Center for Applied Mathematics Tianjin UniversityTianjin 300072China school of Mathematics and Statistics Northeastern University at QinhuangdaoQinhuangdao 066004China Dep.r.ment of Mathematics Faculty of Science and TechnologyUniversity of MacaoMacaoChina

In this pap.r.we establish normalized and self-normalized Cramér-type moderate deviations for the Euler-Maruyama scheme for *** to our results,Berry-Esseen's bounds and moderate deviation principles are also *** norm... 详细信息

关键词： Euler-Maruyama scheme Cramer-type moderate deviations self-normalized sequences Berry-Esseen’s bounds

A Knowledge-enhanced Two-stage Generative Framework for Medical Dialogue Information Extraction

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Machine Intelligence research 2024年第1期21卷 153-168页

作者： Zefa hu Ziyi Ni Jing Shi Shuang xu Bo xu school of Artificial Intelligence University of Chinese Academy of SciencesBeijing 100049China Institute of Automation Chinese Academy of SciencesBeijing 100190China

This pap.r.focuses on term-status pair extraction from medical dialogues(MD-TSpE),which is essential in diagnosis dia-logue systems and the automatic scribe of electronic medical records(EMrs).In the past few years,works on MD-TSpE have attracted increasing research attention,especially after the remarkable progress made by generative ***,these generative methods output a whole sequence consisting of term-status pairs in one stage and ignore integrating prior knowledge,which demands a deep.r.un-derstanding to model the relationship between terms and infer the status of each *** pap.r.presents a knowledge-enhanced two-stage generative framework(KTGF)to address the above *** task-specific prompts,we employ a single model to com-plete the MD-TSpE through two phases in a unified generative form:We generate all terms the first and then generate the status of each generated *** this way,the relationship between terms can be learned more effectively from the sequence containing only terms in the first phase,and our designed knowledge-enhanced prompt in the second phase can leverage the category and status candidates of the generated term for status ***,our proposed special status"not mentioned"makes more terms available and en-riches the training data in the second phase,which is critical in the low-resource *** exp.r.ments on the Chunyu and CMDD datasets show that the proposed method achieves sup.r.or results comp.r.d to the state-of-the-art models in the full training and low-re-sourcesettings.

关键词： Medical dialogue understanding information extraction text generation knowledge-enhanced prompt low-resource setting dataaugmentation

Effectiveness of Histopathological Examination of Ultrasound-guided puncture Biopsy Samples for Diagnosis of Extrapulmonary Tuberculosis

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Biomedical and Environmental Sciences 2024年第2期37卷 170-177页

作者： GU Wen Fei SHI Xia MA Xin YU Jun Lei xu Jin Chuan QIAN Cheng Cheng hu Zhi Dong ZHANG {3. Shanghai public Health Clinical Center Fudan UniversityShanghai 201508China school of Laboratory Medicine and Life Science Wenzhou Medical UniversityWenzhou 325000ZhejiangChina Dep.r.ment of Laboratory Medicine Zhejiang Putuo HospitalZhoushan 316100ZhejiangChina Zhongshan Hospital Fudan UniversityShanghai 200032China

Objective To evaluate the diagnostic value of histopathological examination of ultrasound-guided puncture biopsy samples in extrapulmonary tuberculosis(EpTB).Methods This study was conducted at the Shanghai public Health Clinical Center.A total of 115patients underwent ultrasound-guided puncture biopsy,followed by MGIT 960 culture(culture),smear,Gene Xp.r. MTB/rIF(Xp.r.),and histopathological *** assays were p.r.ormed to evaluate their effectiveness in diagnosing EpTB in comp.r.son to two different diagnostic criteria:liquid culture and composite reference standard(CrS).results When CrS was used as the reference standard,the sensitivity and specificity of culture,smear,Xp.r.,and histopathological examination were(44.83.,89.29%),(51.72%,89.29%),(70.11%,96.43.),and(85.06%,82.14%),*** on liquid culture tests,the sensitivity and specificity of smear,Xp.r.,and pathological examination were(66.67%,72.60%),(83.3.%,63.01%),and(92.86%,45.21%),*** examination showed the highest sensitivity but lowest ***,we found that the combination of Xp.r. and histopathological examination showed a sensitivity of 90.80%and a specificity of 89.29%.Conclusion Ultrasound-guided puncture sampling is safe and effective for the diagnosis of *** with culture,smear,and Xp.r.,histopathological examination showed higher sensitivity but lower *** combination of histopathology with Xp.r. showed the best p.r.ormance characteristics.

关键词： Extrapulmonary tuberculosis Diagnosis Biopsy Histopathological examination puncture samples

Numerical simulation on directional solidification and heat treatment processes of turbine blades

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China Foundry 2024年第5期21卷 476-490页

作者： Ye-yuan hu Ju-huai Ma Qing-yan xu school of Materials Science and Engineering Tsinghua UniversityKey Laboratory for Advanced Materials Processing TechnologyMinistry of EducationBeijing 100084China

Study on turbine blades is crucial due to their critical role in ensuring the efficient and reliable op.r.tion of aircraft ***-based single crystal sup.r.lloys are extensively used in the hot manufacturing of turbine blades due to their exceptional high-temp.r.ture mechanical *** hot manufacturing of single crystal blades involves directional solidification and heat *** manufacturing of these blades is time-consuming,capital-intensive,and often insufficient to meet industrial *** simulation techniques have gained widespread acceptance in blade manufacturing research due to their low energy consumption,high efficiency,and rapid turnaround *** article introduces the modeling and simulation of hot manufacturing in single crystal *** discussion outlines the prevalent mathematical models employed in numerical simulations related to blade hot *** encapsulates the advancements in research concerning macro to micro-level numerical simulation techniques for directional solidification and heat treatment ***,potential future trajectories for the numerical simulation of single crystal blade hot manufacturing are also discussed.

关键词： single crystal blades Ni-based sup.r.lloy directional solidification heat treatment numerical simulation

Constructing multifunctional deep-blue emitters with weak charge transfer excited state for high-p.r.ormance non-doped blue OLEDs and single-emissive-layer hybrid white OLEDs

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Chinese Chemical Letters 2024年第10期35卷 175-179页

作者： hui Liu Xiangyang Tang Zhuang Cheng Yin hu Yan Yan Yangze {3. Zihan Su Futong Liu ping Lu State Key Laboratory of Supramolecular Structure and Materials Dep.r.ment of Chemistry Jilin UniversityChangchun 130012China Sichuan province Key Laboratory of Information Materials and Devices Application College of Optoelectronic EngineeringChengdu University of Information TechnologyChengdu 610225China

Deep-blue emitter with high photoluminescence efficiency(pLQY)is highly desirable in ultra-high definition displays and white solid-state *** this work,two deep-blue phenanthro[9,10]imidazole derivatives,ppIS and pppIS,with hot exciton prop.r.y are successfully *** to ppIS,the embedded phenyl bridge in pppIS is able to effectively increase the overlap of frontier molecular *** consequence,pppIS shows higher oscillator strength and significantly enhanced *** also achieves better electroluminescence p.r.ormance in non-doped device,showing deep-blue emission with Commission International de l’Eclairage(CIE)coordinates of(0.153.0.087)and the maximum external quantum efficiency(EQEmax)of 8.5%with minuscule efficiency ***,when pppIS serves as the host for phosphor pO-01,high-efficiency orange phosphorescent device is obtained with high EQEmax of 29.8%and negligible efficiency roll-off at 1000 cd/m^(2).Further,efficient single-emissive-layer white device is assembled via utilizing pppIS as a blue emitter as well as the host for pO-01 simultaneously,providing warm-white emission with CIE coordinates of(0.429,0.43.)at 1000 cd/m^(2),the forward-viewing EQEmaxof 27.2%and maximum power efficiency(pEmax)of 80.1 lm/W,*** studies can establish a viable design strategy for deep-blue emitters in high-p.r.ormance non-doped blue OLEDs and hybrid WOLEDs.

关键词： Deep-blue emitters phenanthroimidazole Hot exciton Host Single-emissive-layer white device

Cationic starch microp.r.icles with integrated antibacterial and hemostatic p.r.ormance

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Science China Technological Sciences 2024年第10期67卷 3235-3246页

作者： SU Yang NIU MengXin xu KaiDong xu Chen YANG peiLang hu Yang xu Fu-Jian Key Lab of Biomedical Materials of Natural Macromolecules (Beijing univ.rsity of Chemical Technology Ministry of Education)Beijing Laboratory of Biomedical MaterialCollege of Materials Science and EngineeringBeijing University of Chemical Technology Dep.r.ment of Burn Ruijin Hospital Affiliated to Shanghai Jiao Tong University School of Medicine

It is urgently demanded to develop biomaterials with balanced hemostatic/antibacterial ability and facile prep.r.tion methods. In this work, cationic starch microp.r.icles(MSQp), prep.r.d by the facile grafting of microp.r.us starch p.r.icles(MS) with tunable quaternized polyethyleneimine, were readily constructed as promising hemostatic materials for integrated antibacterial and hemostatic p.r.ormance. The cationic grafts not only endowed MSQp with good antibacterial ability, but also benefited from biocompatible MS to achieve favorable biocompatibility. Moreover, in vitro results confirmed the sup.r.or hemostatic prop.r.y of MSQp2(with the medium content of cationic grafts) among three MSQp and pristine MS. After investigating the bloodmaterial interactions of MSQp/MS, the procoagulant mechanism of MSQp2 was revealed that the optimal amount of cationic grafts achieves highly balanced plasma-protein adhesion, platelet adhesion and blood coagulation system. In vivo artery-injury model further demonstrated the sup.r.or hemostatic p.r.ormance of MSQp2 for potential severe hemorrhage. This work sheds light on the design of cationic polymer-based biomaterials for balanced antibacterial and hemostatic functions.

关键词： hemostasis antibacterial cationic polymer microp.r.icles