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Spark plasma sintering of tungsten-based WTaVCr refractory high entropy alloys for nuclear fusion applications

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International Journal of Minerals,Metallurgy and Materials 2024年第1期31卷 146-154页

作者： Yongchul Yoo Xiang Zhang Fei Wang Xin chen Xing-zhong Li Michael Nastasi Bai Cui Department of Mechanical&Materials Engineering University of Nebraska-LincolnLincolnNE 68588USA Nebraska Center for Materials and Nanoscience University of Nebraska-LincolnLincolnNE 68588USA Department of Nuclear Engineering Texas A&M UniversityCollege StationTX 77843USA

W-based WTaVCr refractory high entropy alloys (RHEA) may be novel and promising candidate materials for plasma facing components in the first wall and diverter in fusion reactors. This alloy has been developed by a powder metallurgy process combining mechanical alloying and spark plasma sintering (SPS). The SPSed samples contained two phases, in which the matrix is RHEA with a body-centered cubic structure, while the oxide phase was most likely Ta2VO6through a combined analysis of X-ray diffraction (XRD),energy-dispersive spectroscopy (EDS), and selected area electron diffraction (SAED). The higher oxygen affinity of Ta and V may explain the preferential formation of their oxide phases based on thermodynamic calculations. Electron backscatter diffraction (EBSD) revealed an average grain size of 6.2μm. WTaVCr RHEA showed a peak compressive strength of 2997 MPa at room temperature and much higher micro-and nano-hardness than W and other W-based RHEAs in the literature. Their high Rockwell hardness can be retained to at least 1000°C.

关键词： refractory high entropy alloy plasma-facing material fusion reactor spark plasma sintering

Advancing Underlying Cause of Death Inference Through Wide and Deep Model

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China CDC weekly 2024年第21期6卷 487-492,I0009-I0014页

作者： Xin Fang Shaofen Huang Yanrong Yin Tiehui chen Zhijun Liao Wenling zhong Department for Chronic and Noncommunicable Disease Control and Prevention Fujian Provincial Center for Disease Control and PreventionFuzhou CityFujian ProvinceChina Department of Biochemistry and Molecular Biology School of Basic Medical SciencesFujian Medical UniversityFuzhou CityFujian ProvinceChina

Introduction:Accurately filling out death certificates is essential for death ***,manually determining the underlying cause of death is often *** this study,we investigate the Wide and Deep framework as a method to improve the accuracy and reliability of inferring the underlying cause of ***:Death report data from national-level cause of death surveillance sites in Fujian Province from 2016 to 2022,involving 403,547 deaths,were *** Wide and Deep embedded with Convolutional Neural Networks(CNN)was *** performance was assessed using weighted accuracy,weighted precision,weighted recall,and weighted area under the curve(AUC).A comparison was made with XgBoost,CNN,gated Recurrent Unit(gRU),Transformer,and gRU with ***:The Wide and Deep achieved strong performance metrics on the test set:precision of 95.75%,recall of 92.08%,F1 Score of 93.78%,and an AUC of 95.99%.The model also displayed specific F1 Scores for different cause-of-death chain lengths:97.13%for single causes,95.08%for double causes,91.24%for triple causes,and 79.50%for quadruple ***:The Wide and Deep significantly enhances the ability to determine the root causes of death,providing a valuable tool for improving causeof-death surveillance *** artificial intelligence(AI)in this field is anticipated to streamline death registration and reporting procedures,thereby boosting the precision of public health data.

关键词： thereby boosting precise

CrossLinkNet: An Explainable and Trustworthy AI Framework for Whole-Slide Images Segmentation

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Computers, Materials & Continua 2024年第6期79卷 4703-4724页

作者： Peng Xiao Qi zhong Jingxue chen Dongyuan Wu Zhen Qin Erqia.g Zhou Network and Data Security Key Laboratory of Sichuan Province University of Electronic Science and Technology of ChinaChengdu610054China Faculty of Data Science City University of MacaoMacao999078China

In the intelligent medical diagnosis area,Artificial Intelligence(AI)’s trustworthiness,reliability,and interpretability are critical,especially in cancer *** neural networks,while excellent at processing natural images,often lack interpretability and adaptability when processing high-resolution digital pathological *** limitation is particularly evident in pathological diagnosis,which is the gold standard of cancer diagnosis and relies on a pathologist’s careful examination and analysis of digital pathological slides to identify the features and progression of the ***,the integration of interpretable AI into smart medical diagnosis is not only an inevitable technological trend but also a key to improving diagnostic accuracy and *** this paper,we introduce an innovative Multi-Scale Multi-Branch Feature Encoder(MSBE)and present the design of the CrossLinkNet *** MSBE enhances the network’s capability for feature extraction by allowing the adjustment of hyperparameters to configure the number of branches and *** CrossLinkNet Framework,serving as a versatile image segmentation network architecture,employs cross-layer encoder-decoder connections for multi-level feature fusion,thereby enhancing feature integration and segmentation *** quantitative and qualitative experiments on two datasets demonstrate that CrossLinkNet,equipped with the MSBE encoder,not only achieves accurate segmentation results but is also adaptable to various tumor segmentation tasks and scenarios by replacing different feature ***,CrossLinkNet emphasizes the interpretability of the AI model,a crucial aspect for medical professionals,providing an in-depth understanding of the model’s decisions and thereby enhancing trust and reliability in AI-assisted diagnostics.

关键词： Explainable AI security trustworthy CrossLinkNet whole slide images

Promising interlayer sensitization strategy for the construction of high-performance blue hyperfluorescence OLEDs

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Light(Science & Applications) 2024年第7期13卷 1372-1382页

作者： Jianghui Wang Peng Zou Letian chen Zhentao Bai Hao Liu Wen-cheng chen Yanping Huo Ben zhong Tang Zujin Zhao State Key Laboratory of Luminescent Materials and Devices Guangdong Provincial Key Laboratory of Luminescence from Molecular AggregatesSouth China University of TechnologyGuangzhou 510640China. School of Chemical Engineering and Light Industry Guangdong University of TechnologyGuangzhou 510006China. School of Science and Engineering Shenzhen Institute of Aggregate Science and TechnologyThe Chinese University of Hong KongShenzhenGuangdong 518172China

Multi-resonance thermally activated delayed fluorescence(MR-TADF)materials are promising candidates for organic light-emitting diodes(OLEDs)with narrow electroluminescence(EL)*** researches focus on fabricating hyperfluorescence OLEDs to improve EL efficiencies of MR-TADF emitters by co-doping them with TADF sensitizers in a single host ***,in many cases,the polarity of the single host could be not suitable for both blue MRTADF emitters and blue TADF sensitizers,resulting in broadened EL spectra in high-polar hosts or decreased EL efficiencies in low-polar ***,we wish to report an efficient sensitization strategy for blue MR-TADF emitters by constructing an interlayer-sensitizing configuration,in which the blue TADF sensitizers and blue MR-TADF emitters are separated into two closely aligned host layers with high polarity and low polarity,*** on this strategy,efficient blue hyperfluorescence OLEDs are realized and verified by employing various TADF sensitizers and different MR-TADF emitters,furnishing outstanding external quantum efficiencies of up to 38.8%and narrow EL *** results validate the feasibility and universality of this interlayer sensitization strategy,which provides an effective alternative to high-performance blue hyperfluorescence OLEDs.

关键词： OLEDs interlayer sensitization

Vapor-phase postsynthetic amination of hypercrosslinked polymers for efficient iodine capture

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Chinese Chemical Letters 2024年第9期35卷 320-325页

作者： Pengcheng Su Shizheng chen Zhihong Yang Ningning zhong chenzi Jiang Wanbin Li School of Materials and Chemical Engineering Anhui Jianzhu UniversityHefei 230026China School of Environment Jinan UniversityGuangzhou 511443China Jiangsu Environmental Protection group Nantong Co. Ltd.Nantong 226010China

Hypercrosslinked polymers(HCPs)with large surface areas,high intrinsic porosities and low production costs may be available platforms for iodine ***,the lack of iodine-philicity binding sites limits their adsorption *** we use vapor-phase postsynthetic amination strategy to introduce electron-donating amino groups into the prefabricated HCPs for enhancing their iodine capture *** simple vapor-phase exposure,the halogen-containing HCPs can be grafted by amines through nucleophilic substitution toward chloro *** with the abundant amino groups and high porosities,the amino-functionalized porous polymers show substantially increased iodine adsorption capacity,about 221%as that of original one,accompanied by excellent *** investigations reveal the key roles of the electron-donor amino groups andπ-conjugated benzene rings along with structure characteristics of porous polymer frameworks in iodine ***,this vapor-phase amination strategy shows good generality and can be extended to various amines,e.g.,ethylenediamine,1,3-diaminopropane and *** work proves that this simple vapor-phase postsynthetic functionalization strategy may be applied in other porous polymers with wide application prospects in adsorption,separation and storage.

关键词： Porous polymers Postsynthetic amination Hypercrosslinked polymers Vapor-phase grafting Iodine capture

Immune checkpoint inhibitor-associated gastritis:Patterns and management

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World Journal of gastroenterology 2024年第14期30卷 1941-1948页

作者： Jing Lin zhong-qiao Lin Shi-cheng Zheng Yu chen Department of Medical Oncology Clinical Oncology School of Fujian Medical UniversityFujian Cancer HospitalFuzhou 350000Fujian ProvinceChina Phase I Clinical Trial Ward Clinical Oncology School of Fujian Medical UniversityFujian Cancer HospitalFuzhou 350000Fujian ProvinceChina School of Basic Medical Sciences Fujian Medical UniversityFuzhou 350000Fujian ProvinceChina

Immune checkpoint inhibitors(ICIs)are widely used due to their effectiveness in treating various ***-related adverse events(irAEs)are defined as adverse effects resulting from ICI *** irAEs are a common type of irAEs characterized by intestinal side effects,such as diarrhea and colitis,which may lead to the cessation of *** irAE gastritis is rarely reported,it may lead to serious complications such as ***,irAE gastritis is often difficult to identify early due to its diverse *** steroid hormones and immunosuppressants are commonly used to reverse irAEs,the best regimen and dosage for irAE gastritis remains *** addition,the risk of recurrence of irAE gastritis after the reuse of ICIs should be *** this editorial,strategies such as early identification,pathological diagnosis,mana-gement interventions,and immunotherapy rechallenge are discussed to enable clinicians to better manage irAE gastritis and improve the prognosis of these patients.

关键词： Immunotherapy Immune checkpoint inhibitor Immune-related adverse events Immune checkpoint inhibitor-related gastritis

A stochastic SIS epidemic infectious diseases model with double stochastic perturbations

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International Journal of Biomathematics 2024年第4期17卷 235-266页

作者： Xingzhi chen Baodan Tian Xin Xu Ruoxi Yang Shouming zhong School of Mathematics and Physics Southwest University of Science and TechnologyMianyangSichuan 621010P.R.China College of Mathematics and Statistics Chongqing University ChongqingChongqing 400000P.R.China School of Mathematical Sciences UESTC University of Electronic Science and Technology of China chengdu Sichuan 611731P.R.China

In this paper,a stochastic SiS epidemic infectious diseases model with double stochastic perturbations is ***,the existence and uniqueness of the positive global solution of the model are ***,the controlling conditions for the extinction and persistence of the disease are ***,the effects of the intensity of volatility Si and the speed of reversion 1 on the dynamical behaviors of the model are ***,some numerical examples are given to support the theoretical *** results show that if the basic reproduction number R_(0)^(8)<1,the disease will be extinct,that is to say that we can control the threshold R_(0)^(8)to suppress the disease outbreak.

关键词： Stochastic epidemic model Ornstein-Uhlenbeck process Brownian motion basic reproduction number extinction

Synergy of sodium doping and nitrogen defects in carbon nitride for promoted photocatalytic synthesis of hydrogen peroxide

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Chinese Chemical Letters 2024年第8期35卷 324-329页

作者： Fabrice Nelly Habarugira Ducheng Yao Wei Miao chengcheng Chu zhong chen Shun Mao College of Environmental Science and Engineering State Key Laboratory of Pollution Control and Resource ReuseTongji UniversityShanghai 200092China Baowu Water Technology Co. Ltd.Research InstituteShanghai 201999China

Photocatalytic synthesis of hydrogen peroxide has gradually become a promising method for in-situ pro-duction of hydrogen peroxide,which relies on sustainable solar ***,the commonly used photocatalyst,i.e.,carbon nitride(CN),still suffers from the drawbacks of narrow light absorption range and fast charge ***,we report a facile method to introduce nitrogen defects into carbon nitride together with sodium *** adjusting the ratio of sodium dicyandiamide,the band gap of carbon nitride can be controlled,while the carrier separation and transfer ability of carbon nitride is *** modified CN with sodium doping and nitrogen defect(SD-CN)demonstrates outstanding H_(2)O_(2)pro-duction performance(H_(2)O_(2)yield rate of 297.2μmol L^(−1)h^(−1))under visible light irradiation,which is approximately 9.8 times higher than that of pristine *** work deepens the understanding of the coordinated effect of structural defect and element doping of carbon nitride on the photocatalytic H_(2)O_(2)production performance,and provides new insight into the design of photocatalytic system for efficient production of H_(2)O_(2).

关键词： Photocatalysis H_(2)O_(2)evolution Sodium doping Nitrogen defect Metal-free catalyst

Break of thermal equilibrium between optical and acoustic phonon branches of CsPbI_(3)under continuous-wave light excitation and cryogenic temperature

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Chinese Chemical Letters 2024年第7期35卷 534-537页

作者： Rongliang Deng Yihang chen Xiaotong Fan guolong chen Shuli Wang Changzhi Yu Xiao Yang Tingzhu Wu zhong chen Yue Lin Department of Electronic Science Fujian Engineering Research Center for Solid-State LightingXiamen UniversityXiamen 361005China Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province(IKKEM) Xiamen 361102China Institute of Electromagnetics and Acoustics School of Electronic Science and EngineeringXiamen UniversityXiamen 361005China

The kinetic of low-temperature carrier and lattice of lead-halide perovskite is yet to be fully *** this work,we investigate the steady-state photoluminescences(PLs)of CsPbI_(3)at the environmental temperature(Te)ranging from 20 K to 300 K,and observed anomalous behaviors at cryogenic temperatures:The carrier temperature(Tc)of pure CsPbI_(3)exhibits a negative correlation with Te,accompanied by an expansion in Urbach tails of absorption spectra(Abs.)and excessive red-shifts at peak energy of *** phenomena are also observed in those samples containing a certain amount of Cs_(4)PbI_(6),but to a lesser extent and occurs at lower *** is attributed to the intensified hot phonon bottleneck effect(HPB)in CsPbI_(3)at cryogenic Te,which hinders the energy transfer from hot carriers,via longitudinal optics(LO)phonons to longitudinal acoustic(LA)phonons,to the *** samples under continuous-wave laser excitation,in specific,the barrier induced by the enhanced HPB at low Teprevents the effective thermalization among carriers,LO and LA phonons,which,therefore,form thermally isolated ensembles with different *** cryogenic Terange,the elevated temperatures of carrier and LO phonon expand the high-energy side of PLs and the low-energy tail of Abs.,*** those samples in which the CsPbI_(3)is mixed with Cs_(4)PbI_(6),the interfacial LO-LO interaction across them provides a bypass for heat dissipation,mitigating the heat accumulation in LO-phonons of CsPbI_(3).The results suggest that a strong HPB effect may break the thermal equilibrium among different branches of phonons in the lattice under certain extreme conditions.

关键词： CsPbI_(3) Cs_(4)PbI_(6) Low-temperature carrier Lattice kinetic Hot phonon bottleneck effect Interfacial LO-LO interaction