检索结果-南通市图书馆

Broadband third-order optical nonlinearities of layered franckeite towards mid-infrared regime

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2024年第10期33卷 275-281页

作者： Zhi-Qiang Xu Tian-Tian zhou Jie Li Dong-Yang Liu Yuan He Ning Li Xiao Liu Li-Li Miao Chu-Jun Zhao Shuang-Chun Wen Key Laboratory for Micro/Nano Optoelectronic Devices of Ministry of Education&Hunan Provincial Key Laboratory of Low-Dimensional Structural Physics and Devices School of Physics and ElectronicsHunan UniversityChangsha 410082China School of Mechanical and Electrical Engineering Heze UniversityHeze 274015China

The study of nonlinear optical responses in the mid-infrared(mid-IR)regime is essential for advancing ultrafast mid-IR laser ***,nonlinear optical effects under mid-IR excitation are rarely reported due to the lack of suitable nonlinear optical *** natural van derWaals heterostructure franckeite,known for its narrow bandgap and stability in air,shows great potential for developing mid-IR nonlinear optical *** have experimentally demonstrated that layered franckeite exhibits a broadband wavelength-dependent nonlinear optical response in the mid-IR spectral *** nanosheets were prepared using a liquid-phase exfoliation method,and their nonlinear optical response was characterized in the spectral range of 3000 nm to 5000 *** franckeite nanosheets exhibit broadband wavelengthdependent third-order nonlinearities,with nonlinear absorption and refraction coefficients estimated to be about 10^(-7)cm/W and 10^(-11)cm^(2)/W,***,a passively Q-switched fluoride fiber laser operating around a wavelength of 2800 nm was achieved,delivering nanosecond pulses with a signal-to-noise ratio of 43.6 dB,based on the nonlinear response of *** findings indicate that layered franckeite possesses broadband nonlinear optical characteristics in the mid-IR region,potentially enabling new possibilities for mid-IR photonic devices.

关键词： third-order optical nonlinearities franckeite mid-infrared Q-switching

在线全文

学校读者我要写书评

暂无评论

毛泽东与新民主主义制度的建构

湘潭大学学报（哲学社会科学版） 2024年第4期48卷 8-14,24页

作者：张鉴洲清华大学马克思主义学院北京100080

毛泽东是新民主主义制度的主要建构者。在新民主主义革命历程中,毛泽东通过推动马克思主义国家制度学说中国化、总结凝练新民主主义政权建设经验,为新民主主义制度的确立奠定了理论基础与实践基础,由此形成了坚持党的领导与实现人民民... 详细信息

毛泽东是新民主主义制度的主要建构者。在新民主主义革命历程中,毛泽东通过推动马克思主义国家制度学说中国化、总结凝练新民主主义政权建设经验,为新民主主义制度的确立奠定了理论基础与实践基础,由此形成了坚持党的领导与实现人民民主相统一的政治制度、消灭剥削制度与解放社会生产力相统一的经济制度和民族的形式、科学的内容、大众的方向相统一的文化制度,构筑起新民主主义制度的四梁八柱,并根据社会条件变化,明确了由新民主主义制度向社会主义制度过渡的“时间表”和“路线图”,指明了新民主主义制度向社会主义制度转变的方向。

关键词：毛泽东中国共产党新民主主义制度马克思主义中国化

A review on the applications of graph neural networks in materials science at the atomic scale

在线全文

学校读者我要写书评

暂无评论

Materials Genome Engineering Advances 2024年第2期2卷 1-19页

作者： Xingyue Shi linming zhou Yuhui Huang Yongjun Wu Zijian Hong School of Materials Science and Engineering Zhejiang UniversityHangzhouZhejiangChina Nanhu Brain-Computer Interface Institute HangzhouZhejiangChina Research Institute of Zhejiang University-Taizhou TaizhouZhejiangChina State Key Laboratory of Silicon and Advanced Semiconductor Materials Zhejiang UniversityHangzhouZhejiangChina

In recent years,interdisciplinary research has become increasingly popular within the scientific *** fields of materials science and chemistry have also gradually begun to apply the machine learning technology developed by scientists from computer *** neural networks(GNNs)are new machine learning models with powerful feature extraction,relationship inference,and compositional generalization *** advantages drive researchers to design computational models to accelerate material property prediction and new materials design,dramatically reducing the cost of traditional experimental *** review focuses on the principles and applications of the *** basic concepts and advantages of the GNNs are first introduced and compared to the traditional machine learning and neural ***,the principles and highlights of seven classic GNN models,namely crystal graph convolutional neural networks,iCGCNN,Orbital Graph Convolutional Neural Network,MatErials Graph Network,Global Attention mechanism with Graph Neural Network,Atomistic line Graph Neural Network,and BonDNet are *** connections and differences are also ***,insights and prospects are provided for the rapid development of GNNs in materials science at the atomic scale.

关键词： CGCNN graph neural networks MACHINE learning materials design property prediction

压接型IGBT器件短路失效管壳爆炸特性及防护方法

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

中国电机工程学报 2024年第6期44卷 2350-2361,I0023页

作者：周扬唐新灵王亮张晓伟代安琪林仲康金锐魏晓光先进输电技术国家重点实验室(北京智慧能源研究院) 北京市昌平区102209 爆炸科学与技术国家重点实验室(北京理工大学) 北京市海淀区100081

压接型绝缘栅双极性晶体管(insulated gate bipolar transistor,IGBT)作为现有柔性直流输电设备的核心部件,在实际应用中,由于承受高电压、大电流的工作环境,容易发生短路过流失效,进而造成的结构爆炸现象。为研究这一爆炸现象的破坏效... 详细信息

压接型绝缘栅双极性晶体管(insulated gate bipolar transistor,IGBT)作为现有柔性直流输电设备的核心部件,在实际应用中,由于承受高电压、大电流的工作环境,容易发生短路过流失效,进而造成的结构爆炸现象。为研究这一爆炸现象的破坏效应及其防护,该文结合多组模拟模块化多电平工况实验,得到IGBT器件短路过流失效爆炸后外壳结构的变形特征。结合电气能量特性的分析和实际爆炸失效形貌特点,建立该IGBT器件结构的数值仿真模型,初步确定实际爆炸过程中的等效TNT爆炸当量。在此基础上,从提高结构自身抗爆能力、增加能量外泄通道、替换结构材料等角度开展IGBT器件的结构优化设计,并进行相关试验验证。结果表明,将管壳的陶瓷材料替换为纤维增强复合材料可有效提高结构的防爆性能,降低器件的破坏程度。

关键词：压接型绝缘栅双极性晶体管器件短路失效爆炸特性防爆仿真

LMP2-DC Vaccine Elicits Specific EBV-LMP2 Response to Effectively Improve Immunotherapy in Patients with Nasopharyngeal Cancer

在线全文

学校读者我要写书评

暂无评论

Biomedical and Environmental Sciences 2020年第11期33卷 849-856页

作者： ZENG Yi SI Yong Feng LAN gui Ping WANG Zhan zhou ling TANG Min Zhong SJ O`Brien LAN Jiao zhou Xiang Yang WANG Yong Li TANG Juan zhou Zhi Xiang DU Hai Jun lin Hui State Key Laboratory for Infectious Disease Prevention and Control National Institute of Viral Disease Control and PreventionChinese Center for Disease Control and PreventionBeijing 102206China People's Hospital of Guangxi Zhuang Autonomous Region Nanning 530021GuangxiChina Cancer center Wuzhou Red Cross HospitalWuzhou 543002GuangxiChina Guy Harvey Oceanographic Center Halmos College of Natural Sciences and OceanographyNova Southeastern UniversityFlorida 33004USA College of Life Science and Bioengineering Beijing University of TechnologyBeijing 100124China

Objective To evaluate the safety and effectiveness of a vaccine based on latent membrane protein 2(LMP2)modified dendritic cells(DCs)that boosts specific responses of cytotoxic T lymphocytes(CTLs)to LMP2 before and after intradermal injection in patients with nasopharyngeal carcinoma(NPC).Methods DCs were derived from peripheral blood monocytes of patients with *** prepared LMP2-DCs infected by recombinant adenovirus vector expressing LMP2(rAd-LMP2).NPC patients were immunized with 2×105 LMP2-DCs by intradermal injection at week 0 and after the second and fourth *** responses to LMP2 were detected by enzyme-linked immunospot(ELISPOT)assay at week 0 and at the fifth and eighth *** clinicians performed the follow-up and tracking of *** We demonstrated that DCs derived from monocytes displayed typical DC morphologies;the expression of LMP2 in the LMP2-DCs vaccine was confirmed by immunocytochemical ***-nine patients with NPC were enrolled in this clinical *** LMP2-DCs vaccine was well tolerated in all of the *** responses to LMP2 peptide sub-pools were observed in 18 of the 29 patients with *** follow-up data of 29 immunized patients from April,2010 to April 2015 indicated a five-year survival rate of 94.4%in responders and 45.5%in *** In this pilot study,we demonstrated that the LMP2-DCs vaccine is safe and effective in patients with *** CTLs responses to LMP2 play a certain role in controlling and preventing the recurrence and metastasis of NPC,which warrants further clinical testing.

关键词： LMP2-DCs Nasopharyngeal carcinoma Immunotherapy

斑点追踪二尖瓣环位移和心肌综合指数评价COPD患者左心室收缩功能及临床应用价值

在线全文

学校读者我要写书评

暂无评论

农垦医学 2024年第3期46卷 198-205页

作者：王子静欧华静周广琴任珊芦桂林董珊珊石河子大学第一附属医院超声医学科新疆石河子832008 石河子大学第一附属医院呼吸科新疆石河子832008 石河子大学第一附属医院重症医学科新疆石河子832008

目的:应用斑点追踪技术(STI)检测组织运动二尖瓣环位移(TMAD)和心肌综合指数(MCI)评价慢性阻塞性肺疾病(COPD)患者左心室收缩功能的早期变化,探讨二者的相关性及诊断效能。方法:选取42例COPD患者和30例健康人群(对照组),当COPD患者肺动... 详细信息

目的:应用斑点追踪技术(STI)检测组织运动二尖瓣环位移(TMAD)和心肌综合指数(MCI)评价慢性阻塞性肺疾病(COPD)患者左心室收缩功能的早期变化,探讨二者的相关性及诊断效能。方法:选取42例COPD患者和30例健康人群(对照组),当COPD患者肺动脉收缩压(PASP)≥40mm Hg考虑为肺动脉高压(PH)组,余患者为不伴PH组。采用3D-STI获得左室三维参数,并计算心肌综合指数(MCI=GLS×LVtw),应用2D-STI测量TMAD各参数,比较组间差异;绘制各参数的ROC曲线,分析其相关性。结果:与对照组比较:COPD组及亚组的左室舒张末容积(LVEDV)、左室收缩末容积(LVESV)及LVEF无明显差异(P>0.05);COPD组、COPD伴PH组的左室整体纵向应变(GLS)、扭转角度(LVtw)绝对值减低(P0.6,且P<0.001),且随着PASP的增高呈下降趋势。结论:TMAD、GLS及MCI均有助于发现COPD患者左心室收缩功能的早期变化,TMAD、GLS绝对值与PASP呈负相关,其中TMAD操作更便捷、省时。

关键词：二尖瓣环位移斑点追踪技术整体纵向应变心肌综合指数慢性阻塞性肺疾病左心室功能

Synthesis and characterization of PMMA/Al_2O_3 composite particles by in situ emulsion polymerization

在线全文

学校读者我要写书评

暂无评论

Particuology 2008年第3期6卷 207-213页

作者： Hui Liu Hongqi Ye Tianquan lin Tao zhou College of Chemistry and Chemical Engineering Central South University Changsha 410083 China

In order to improve its dispersibility, superfine alumina （A1203） was encapsulated with poly（methyl methacrylate）（PMMA） by in situ emulsion polymerization. It was found that only when the concentration of sodium dodecyl sulfate （SDS） was much higher than its critical micelle concentration, could PMMA/Al2O3 composite particles with high percentage of grafting （PG） be prepared. The same results were obtained between the experimental and stoichiometric amounts of tris（dodecylbenzenesulfonate） isopropoxide （NDZ）, indicating that single-molecule-layer adsorption had taken place between NDZ and Al2O3. Analysis using FTIR, TEM and XPS showed that PMMA/Al2O3 composite particles with core-shell structure had been successfully synthesized by in situ emulsion polymerization. Compared to Al2O3, thermal stability and dispersibility of the composite particles showed marked improvement.

关键词： PMMA Alumina Composite particle Encapsulation Dispersibility

Protective effect of Fu Brick tea on high-fat diet-induced metabolic syndrome: Relevant to protecting the intestinal barrier and regulating the gut microbiota

在线全文

学校读者我要写书评

暂无评论

Food Science and Human Wellness 2024年

作者： Wenwen Fang Fang zhou Kuofei Wang Shuai Wen Hongzhe Zeng Hao Xu Jingyi Tang Jian-an Huang Zhonghua Liu Key Laboratory of Tea Science of Ministry of Education，National Research Center of Engineering and Technology for Utilization of Botanical Functional Ingredients，Key Laboratory for Evaluation and Utilization of Gene Resources of Horticultural Crops， Ministry of Agriculture and Rural Affairs of China， Hunan Agricultural University

This study investigated the therapeutic effects on metabolic syndrome (MetS) and the impact on the intestinal barrier and gut microbiota of Fu brick tea aqueous extracts (FTE) on metabolic syndrome (MetS) in rats fed with a high-fat diet (HFD). Here， the results showed that FTE supplement significantly reduced HFD-induced weight gain， adiposity， dyslipidemia， fasting blood glucose (PBG) increment， and non-alcoholic fatty liver disease (NAFLD). Moreover， FTE supplement resulted in a decline in lipopolysaccharide (LPS) level and attenuation of colonic inflammation and oxidative stress to protect the intestinal barrier function. FTE supplement also maintained the intestinal barrier integrity by improving histological appearance and promoting ZO-1， Occludin， and Claudin-1 protein expression levels. Meanwhile， FTE supplement alleviated the gut microbiota dysbiosis by enhancing the Firmicutes/Bacteroidetes (F/B) ratio and stimulating the colonization of probiotic bacteria such as Akkermansia， Lactobacillus， Adlercreutzia， and Bacteroides. These findings collectively suggest that Fu brick tea could alleviate MetS and Mets-associated traits with the mechanism relevant to the protection of intestinal barrier and gut microbiota regulation.

关键词：

The exploration of cell population data in clinical use: Beyond infectious diseases

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

iLABMED 2024年第2期2卷 125-140页

作者： Shayuanzi Huang Yin Liu Liu Qian Juan zhou Dong Wang Department of Laboratory Medicine the First Affiliated HospitalSun Yat-Sen UniversityGuangzhouGuangdongChina Department of Laboratory Medicine Guangxi Hospital Division of the First Affiliated HospitalSun Yat-Sen UniversityNanningGuangxiChina Department of Medical Affair Danaher Diagnostic PlatformShanghaiChina Department of Oncology General Hospital of the Southern Theatre CommandPLAGuangzhouGuangdongChina

Cell population data(CPD)is regarded as the fingerprint of a blood cell at a given *** parameters harbor information associated with cell morphology and can be automatically generated using modern hematological *** studies have revealed many unique clinical applications for CPD,especially for infectious diseases,such as *** example,one monocyte-related CPD parameter is the monocyte distribution width(MDW),which can be generated using a Beckman Coulter hematological *** has received FDA and CE approval for aiding in sepsis diagnosis in adult patients in the emergency ***,MDW can serve as a diagnostic biomarker in patients infected with *** has also been widely explored for possible clinical applications beyond infectious dis-eases,such as for predicting myelodysplastic syndromes,screening for he-matological malignancies,and detecting sterile *** parameter measurements are easily obtained and quite cost-effective,making them practical for clinical ***,there are some potential drawbacks of CPD *** pre-analytical conditions can affect CPD ***-more,CPD are specific to certain hematological analyzers and the result cannot be transferred between different *** practical usefulness of CPD reference intervals is also still *** this review,wesummarize the current studies related to CPD and its clinical *** well-designed clinical studies related to CPD are still expected.

关键词： cell population data Coulter principle hematology analyzer infectious diseases white blood cell