检索结果-南通市图书馆

Fabrication of dense SiBCN monolith at a lower temperature and its high-temperature performance

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Advanced Ceramics 2024年第8期13卷 1198-1211页

作者： Zi-Bo Niu Daxin Li Dechang Jia Zhihua Yang Kunpeng Lin Yan Wang Paolo Colombo Ralf Riedel Yu Zhou Institute for Advanced Ceramics School of Materials Science and EngineeringHarbin Institute of TechnologyHarbin 150080China Key Laboratory of Advanced Structural-Function Integrated Materials and Green Manufacturing Technology Ministry of Industry and Information TechnologyHarbin 150080China State Key Laboratory of Advanced Welding and Joining Harbin Institute of TechnologyHarbin 150080China Department of Industrial Engineering University of PadovaPadova 3513iItaly Department of Materials Science and Engineering The Pennsylvania State UniversityUniversity Park 16802USA Institute of Materials Science Darmstadt University of TechnologyDarmstadt 64287Germany School of Materials Science and Engineering Harbin Institute of Technology(Shenzhen)Shenzhen 518055China

In this study,a crack-free pyrolysis process of partially cured precursor powder compacts was developed to prepare dense silicon boron carbonitride(SiBCN)monoliths at much lower temperatures(1300℃),thereby circumventing the challenges of sintering densification(>1800℃).Unlike the elastic fracture in over-cured precursors or the viscoelastic deformation in under-cured precursors,the partially cured precursor,exhibiting elastic-plastic deformation behavior,facilitates limited nanoscale pore formation in a dense structure,achieving a balance between crack-free pyrolysis and *** to SiBCN derived from the over-cured precursor(σ=~159 MPa,K_(IC)=1.9 MPa:m^(1/2),Vickers hardness(HV)=7.8 GPa,and E=122 GPa),the resulting SiBCN monolith exhibited significantly improved mechanical properties(σ=~304 MPa,K_(IC)=3.7 MPa-m12,HV=10.6 GPa,and E=161 GPa)and oxidation *** addition,this study investigated the high-temperature performance of SiBCN monoliths,including crystallization and oxidation,and determined the oxidation kinetics induced by pore structure healing and the different oxidation mechanisms of Si-C-N and B-C-N clusters in the amorphous *** to its unique composition and structure,the SiBCN ceramic oxide layer exhibits exceptional self-healing effects on repairing the nanoporous system in the initial stage and shows outstanding high-temperature stability during prolonged oxidation,mitigating adverse effects from bubble formation and *** to the nanoporous structure,the oxidation rate is initially controlled by gas diffusion following a linear law before transitioning to oxide layer diffusion characterized by a parabolic ***,due to different valence bond configurations,Si-C-N transforms into an amorphous SiCNO structure after phase separation,unlike the nucleation and growth of residual B-N-C.

关键词： silicon boron carbonitride(SiBCN)ceramics crack-free pyrolysis amorphous structure oxidation mechanisms kinetic law

Reading of Qin Bamboo Slips

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

China Book International 2024年第2期 88-91页

作者： Zhao Yan Kuang Yu Chen Dietrich Tschanz School of Liberal Arts Northeast Normal University Department of East Asian Studies at Rutgers university in New Jersey Confucius Institute at Rutgers university Rutgers university in New Jersey university Chinese of Zurich university of pennsylvania Rutgers university

This book contains a total of 44 articles in 16 groups of Qin bamboo slips,through the interpretation of characters,words,sentence analysis,chapter identification,and interpretation of literary meaning,the original esoteric and difficult documents are dismantled layer by layer,and the relevant historical background is introduced,in an effort to enable readers to obtain a complete background of knowledge needed to understand Qin bamboo slips.

关键词： meaning Bamboo enable

Comprehensive overview of genotype distribution and prevalence of human papillomavirus in cervical lesions

维普期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

Gynecology and Obstetrics Clinical Medicine 2024年第1期4卷 37-47页

作者： Yuhong Ye Terrel Jones Tiannan Wang Xianxu Zeng Yang Liu Chengquan Zhao Department of Pathology the First Affiliated HospitalFujian Medical UniversityFuzhouFujianChina Department of Pathology Magee-Womens HospitalUniversity of Pittsburgh Medical CenterPittsburghPennsylvaniaUSA Department of Pathology University of Southern CaliforniaLos AngelesCaliforniaUSA Department of Pathology The Third Affliated Hospital of Zhengzhou UniversityZhengzhouHenanChina Departments of Medicine and Bioengineering University of PittsburghPittsburghPennsylvaniaUSA Department of Bioengineering University of Illinois Urbana-ChampaignUrbanaIllinoisUSA

Acrosscervical squamousandgl and ular lesions,a spectrum of human papillomavirus(HPV)genotypes has been *** review aims to provide a comprehensive summary detailing the distribution and profile of HPV genotypes detected in cervical lesions,leveraging insights from histological and cytological ***-risk HPV(HR-HPV)genotypes exhibit varying degrees of oncogenic potential,with HPV16 and HPV18 identified as the most prevalent and oncogenic *** of HR-HPVgenotypes varies among different degrees of the cervical lesions and varies between squamous andglandular ***16 is predominantly associated with severe lesions(precancers and carcinomas),while HPV18 demonstrates a significantly higher prevalence in endocervical as compared with squamous *** distribution of HR-HPV in severe squamous lesions is complex,involving many HR-HPV genotypes in addition to HPV16,while the distribution of HR-HPV genotypes in endocervical glandular lesions is mainly limited in HPV18 and *** datasets from China have identified the three mostcommon HR-HPVgenotypes in this population as stratified by diagnostic category:HPV52,HPV16,HPV58 in histologically negative cases and cervical intraepithelial neoplasia 1(CIN1);HPV16,HPV52,HPV58 in CIN2/3;HPV16,HPV58,HPV52 or HPV18 in squamous cell carcinoma(SCC);HPV16,HPV18 and HPV52 in endocervical adenocarcinoma in situ(AIS),invasiveadenocarcinoma,as well asmixedsquamous and glandular ***33 is the fourth most common HPVtype in CIN2/3and SCC,whileHPV45occursmore commonly in AIS and adenocarcinoma,compared with squamous *** prevalence and distribution of multiple HR-HPV coinfections vary across different cervical *** clinical significance and pathogenesis of these multiple HR-HPV infections remain uncertain,although recent two large studies demonstrate that multiple HR-HPV infections are not associated with cumulatively higher risk of high-grade cervical squamous lesiondeve

关键词： cervical lesions prevalence

Revealing the role of CCoAOMT1: fine-tuning bHLH transcription factors for optimal anther development

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China(Life Sciences) 2024年第3期67卷 565-578页

作者： Zesen Lai Jianzheng Wang Ying Fu Menghan Wang Hong Ma Shiqing Peng Fang Chang State Key Laboratory of Genetic Engineering Ministry of Education Key Laboratory of Biodiversity Sciences and Ecological Engineering and Institute of Biodiversity SciencesInstitute of Plant BiologySchool of Life SciencesFudan UniversityShanghai 200438China School of Tropical Agriculture and Forestry Agriculture-Rural Affairs and Rural RevitalizationHainan UniversityHaikou 570228China Key Laboratory of Biology and Genetic Resources of Tropical Crops Ministry of AgricultureInstitute of Tropical Bioscience and BiotechnologyChinese Academy of Tropical Agricultural SciencesHaikou 571101China Department of Biology Huck Institutes of the Life SciencesPennsylvania State UniversityUniversity ParkPA 16802USA

The tapetum,a crucial innermost layer encompassing male reproductive cells within the anther wall,plays a pivotal role in normal pollen *** transcription factors (TFs) bHLH010/089/091 redundantly facilitate the rapid nuclear accumulation of DYSFUNCTIONAL TAPETUM 1,a gatekeeper TF in the ***,the regulatory mechanisms governing the activity of bHLH010/089/091 remain *** this study,we reveal that caffeoyl coenzyme A O-methyltransferase 1 (CCoAOMT1) is a negative regulator affecting the nuclear localization and function of bHLH010 and bHLH089,probably through their K259 *** findings underscore that CCoAOMT1 promotes the nuclear export and degradation of bHLH010 and ***,elevated CCoAOMT1 expression resulted in defective pollen development,mirroring the phenotype observed in bhlh010 bhlh089 ***,our investigation revealed that the K259A mutation in the bHLH089 protein disrupted its translocation from the nucleus to the cytosol and impeded its degradation induced by ***,transgenic plants with the probHLH089::bHLH089^(K259A)construct failed to rescue proper pollen development or gene expression in bhlh010 bhlh089 ***,these findings emphasize the need to maintain balanced TF homeostasis for male *** firmly establish CCoAOMT1 as a pivotal regulator that is instrumental in achieving equilibrium between the induction of the tapetum transcriptional network and ensuring appropriate anther development.

关键词： anther development nuclear localization bHLH O-methyltransferase transcription factor homeostasis

Ab initio nonadiabatic molecular dynamics study on spin–orbit coupling induced spin dynamics in ferromagnetic metals

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

Chinese Physics B 2024年第1期33卷 156-163页

作者：朱万松郑镇法郑奇靖赵瑾 Department of Physics and ICQD/Hefei National Research Center for Physical Sciences at the Microscale University of Science and Technology of ChinaHefei 230026China Department of Physics and Astronomy University of PittsburghPittsburghPennsylvania 15260USA

Understanding the photoexcitation induced spin dynamics in ferromagnetic metals is important for the design of photo-controlled ultrafast spintronic *** this work,by the ab initio nonadiabatic molecular dynamics simulation,we have studied the spin dynamics induced by spin–orbit coupling(SOC)in Co and Fe using both spin-diabatic and spin-adiabatic *** Co system,it is found that the Fermi surface(E_(F))is predominantly contributed by the spin-minority *** SOC induced spin flip will occur for the photo-excited spin-majority electrons as they relax to the E_(F),and the spin-minority electrons tend to relax to the EFwith the same spin through the electron–phonon coupling(EPC).The reduction of spin-majority electrons and the increase of spin-minority electrons lead to demagnetization of Co within100 *** contrast,in Fe system,the E_(F) is dominated by the spin-majority *** this case,the SOC induced spin flip occurs for the photo-excited spin-minority electrons,which leads to a magnetization *** we move the E_(F) of Fe to higher energy by 0.6eV,the E_(F) will be contributed by the spin-minority states and the demagnetization will be observed *** work provides a new perspective for understanding the SOC induced spin dynamics mechanism in magnetic metal systems.

关键词： nonadiabatic molecular dynamics spin dynamics spin–orbit coupling ferromagnetic metal

The use of hydrogel microspheres as cell and drug delivery carriers for bone,cartilage,and soft tissue regeneration

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

Biomaterials Translational 2024年第3期5卷 236-256页

作者： Chung-Hsun Lin Jesse RSrioudom Wei Sun Malcolm Xing Su Yan Le Yu Jian Yang Department of Biomedical Engineering The Pennsylvania State UniversityUniversity ParkPAUSA Department of Bioengineering University of PennsylvaniaPhiladelphiaPAUSA Leicester International Institute Dalian University of TechnologyPanjinLiaoning ProvinceChina Department of Mechanical Engineering University of ManitobaWinnipegCanada Division of Biological and Biomedical Systems University of Missouri-Kansas CityKansas CityMOUSA Biomedical Engineering Program Westlake UniversityHangzhouZhejiang ProvinceChina Research Centre for Industries of the Future Westlake UniversityHangzhouZhejiang ProvinceChina

Bone,cartilage,and soft tissue regeneration is a complex process involving many cellular activities across various cell *** remain the“gold standard”for the regeneration of these ***,the use of autografts is associated with many disadvantages,including donor scarcity,the requirement of multiple surgeries,and the risk of *** development of tissue engineering techniques opens new avenues for enhanced tissue ***,the expectations of tissue engineering scaffolds have gone beyond merely providing physical support for cell *** scaffolds should also provide biological cues to actively boost tissue *** a new type of injectable biomaterial,hydrogel microspheres have been increasingly recognised as promising therapeutic carriers for the local delivery of cells and drugs to enhance tissue *** to traditional tissue engineering scaffolds and bulk hydrogel,hydrogel microspheres possess distinct advantages,including less invasive delivery,larger surface area,higher transparency for visualisation,and greater flexibility for ***,we review the materials characteristics of hydrogel microspheres and compare their fabrication approaches,including microfluidics,batch emulsion,electrohydrodynamic spraying,lithography,and mechanical ***,based on the different requirements for bone,cartilage,nerve,skin,and muscle tissue regeneration,we summarize the applications of hydrogel microspheres as cell and drug delivery carriers for the regeneration of these ***,hydrogel microspheres are regarded as effective therapeutic delivery carriers to enhance tissue regeneration in regenerative ***,significant effort is required before hydrogel microspheres become widely accepted as commercial products for clinical use.

关键词： drug delivery fabrication techniques hydrogel microspheres microgels tissue regeneration

A review of integrated surface-subsurface numerical hydrological models

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China Earth Sciences 2024年第5期67卷 1459-1479页

作者： Lele SHU Hao CHEN Xianhong MENG Yan CHANG Litang HU Wenke WANG Longcang SHU Xuan YU Christopher DUFFY Yingying YAO Donghai ZHENG Key Laboratory of Cryospheric Science and Frozen Soil Engineering Northwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhou 730000China College of Water Sciences Beijing Normal UniversityBeijing 100038China School of Water and Environment Chang’an UniversityXi’an 710064China College of Hydrology and Water Resources Hohai UniversityNanjing 210098China State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil ScienceChinese Academy of SciencesNanjing 210008China Department of Civil and Environmental Engineering Pennsylvania State UniversityState CollegePA 16801USA Department of Earth and Environmental Science School of Human Settlements and Civil EngineeringXi’an Jiaotong UniversityXi’an 710049China Institute of Tibetan Plateau Research Chinese Academy of SciencesBeijing 100101China

Hydrological modeling,leveraging mathematical formulations to represent the hydrological cycle,is a pivotal tool in representing the spatiotemporal dynamics and distribution patterns inherent in *** models serve a dual purpose:they validate theoretical robustness and applicability via observational data and project future trends,thereby bridging the understanding and prediction of natural *** rapid advancements in computational methodologies and the continuous evolution of observational and experimental techniques,the development of numerical hydrological models based on physicallybased surface-subsurface process coupling have *** in micro-scale conservation principles and physical equations,these models employ numerical techniques to integrate surface and subsurface hydrodynamics,thus replicating the macro-scale hydrological responses of *** hydrological models have emerged as a leading and predominant trend in hydrological modeling due to their explicit representation of physical processes,heightened by their spatiotemporal resolution and reliance on interdisciplinary *** article focuses on the theoretical foundation of surface-subsurface numerical hydrological *** includes a comparative and analytical discussion of leading numerical hydrological models,encompassing model architecture,numerical solution strategies,spatial representation,and coupling ***,this paper contrasts these models with traditional hydrological models,thereby delineating the relative merits,drawbacks,and future directions of numerical hydrological modeling.

关键词： Numerical Hydrological Models Surface-Subsurface Process Coupling Numerical Methods Hydrological Modeling

Chiral quantum heating and cooling with an optically controlled ion

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

Light(Science & Applications) 2024年第7期13卷 1393-1400页

作者： Jin-Tao Bu Jian-Qi Zhang Ge-Yi Ding Jia-Chong Li Jia-Wei Zhang Bin Wang Wen-Qiang Ding Wen-Fei Yuan Liang Chen Qi Zhong Ali Keçebaş Şahin KÖzdemir Fei Zhou Hui Jing Mang Feng State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics Wuhan Institute of Physics and MathematicsInnovation Academy of Precision Measurement Science and TechnologyChinese Academy of Sciences430071 WuhanChina. university of the Chinese Academy of Sciences 100049 BeijingChina. Research Center for Quantum Precision Measurement Guangzhou Institute of Industry Technology511458 GuangzhouChina. Department of Engineering Science and Mechanics and Materials Research InstitutePennsylvania State UniversityUniversity ParkState CollegePA 16802USA. Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education Department of Physics and Synergetic Innovation Center for Quantum Effects and ApplicationsHunan Normal University410081 ChangshaChina. Department of Physics Zhejiang Normal University321004 JinhuaChina

Quantum heat engines and refrigerators are open quantum systems,whose dynamics can be well understood using a non-Hermitian formalism.A prominent feature of non-Hermiticity is the existence of exceptional points(EPs),which has no counterpart in closed quantum *** has been shown in classical systems that dynamical encirclement in the vicinity of an EP,whether the loop includes the EP or not,could lead to chiral mode ***,we show that this is valid also for quantum systems when dynamical encircling is performed in the vicinity of their Liouvillian EPs(LEPs),which include the effects of quantum jumps and associated noise—an important quantum feature not present in previous *** demonstrate,using a Paul-trapped ultracold ion,the first chiral quantum heating and refrigeration by dynamically encircling a closed loop in the vicinity of an *** witness the cycling direction to be associated with the chirality and heat release(absorption)of the quantum heat engine(quantum refrigerator).Our experiments have revealed that not only the adiabaticity breakdown but also the Landau–Zener–Stückelberg process play an essential role during dynamic encircling,resulting in chiral thermodynamic *** observations contribute to further understanding of chiral and topological features in non-Hermitian systems and pave a way to exploring the relation between chirality and quantum thermodynamics.

关键词： quantum chiral dynamical

Prevalence of post-traumatic stress disorder and depressive symptoms among civilians residing in armed conflict-affected regions:a systematic review and meta-analysis

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

General Psychiatry 2024年第3期37卷 324-334页

作者： Syed Hassan Ahmed Aabia Zakai Maha Zahi Muhammad Youshay Jawad Rui Fu Michael Chaiton Dow university of Health Sciences KarachiPakistan Department of Psychiatry and Behavioral Health Penn State College of MedicineHersheyPennsylvaniaUSA Dalla Lana School of Public Health University of TorontoTorontoOntarioCanada institute of Mental Health Policy Research The Center of Addiction and Mental HealthTorontoOntarioCanada

Background Globally,populations afflicted by armed conflict are known to have high rates of mental health *** This meta-analysis aims to estimate the prevalence of post-traumatic stress disorder(PTSD)and depressive symptoms among civilians residing in armed conflictaffected *** This meta-analysis was conducted in accordance with the Preferred Reporting Items forSystematic Reviews and Meta-Analyses.A literature search employing MEDLINE(R),Embase Classic+Embase,APA PsyclNFO,Ovid Healthstar,Journal@Ovid Full Text,Cochrane,PTSDpubs and CINAHL was conducted from inception until 19 March 2024 to identify relevant *** assessment was performed using the Joanna Briggs Institute Critical Appraisal Checklist for Prevalence Studies,and a Comprehensive Meta-Analysiswas usedto conduct the statistical *** The search yielded 38595 articles,of which 57 were considered eligible for *** included studies comprised data from 64596 *** estimated a prevalence of 23.70%(95%CI 19.50%to28.40%)forPTSD symptomsand 25.60%(95%Cl 20.70%to 31.10%)for depressive features among war-afflicted *** subgroup analysis based on time since the war and the country's economic status revealed the highest prevalence for both PTSD and depressive symptoms was present during the years of war and in low/*** The results of this study provide conclusive evidence of the detrimental impacts of armed conflict on mental health ***,it is crucial to emphasise the significance of both physical and mental health in the aftermath of war and take appropriate humanistic measures to overcome challenges in the management of psychiatric illnesses.

关键词： analysis stress armed