检索结果-南通市图书馆

Memristive switching in the surface of a charge-density-wave topological semimetal

Science Bulletin 2024年第13期69卷 2042-2049页

作者： Jianwen Ma xianghao Meng Binhua Zhang Yuxiang Wang Yicheng Mou Wenting Lin Yannan Dai Luqiu Chen Haonan Wang Haoqi Wu Jiaming Gu Jiayu Wang Yuhan Du Chunsen Liu Wu Shi Zhenzhong yang Bobo Tian Lin Miao peng Zhou Chun-Gang Duan Changsong Xu xiang Yuan Cheng Zhang State Key Laboratory of Surface Physics and Institute for Nanoelectronic Devices and Quantum Computing Fudan UniversityShanghai 200433China State Key Laboratory of Precision Spectroscopy East China Normal UniversityShanghai 200241China Key Laboratory of Computational Physical Sciences(Ministry of Education) Institute of Computational Physical SciencesState Key Laboratory of Surface PhysicsDepartment of PhysicsFudan UniversityShanghai 200433China Shanghai Qi Zhi Institute Shanghai 200030China School of Physics Southeast UniversityNanjing 211189China Key Laboratory of Polar Materials and Devices(Ministry of Education) Department of ElectronicsEast China Normal UniversityShanghai 200241China Shanghai Center of Brain–inspired Intelligent Materials and Devices East China Normal UniversityShanghai 200241China State Key Laboratory of ASIC and System School of MicroelectronicsFudan UniversityShanghai 200433China Frontier Institute of Chip and System Fudan UniversityShanghai 200433China Zhangjiang Fudan International Innovation Center Fudan UniversityShanghai 201210China School of Physics and Electronic Science East China Normal UniversityShanghai 200241China

Owing to the outstanding properties provided by nontrivial band topology,topological phases of matter are considered as a promising platform towards low-dissipation electronics,efficient spin-charge conversion,and topological quantum *** ferroelectricity in topological materials enables the non-volatile control of the quantum states,which could greatly facilitate topological electronic ***,ferroelectricity is generally incompatible with systems featuring metallicity due to the screening effect of free *** this study,we report the observation of memristive switching based on the ferroelectric surface state of a topological semimetal(TaSe_(4))*** find that the surface state of(TaSe_(4))2I presents out-of-plane ferroelectric polarization due to surface *** the combination of ferroelectric surface and charge-density-wave-gapped bulk states,an electric-switchable barrier height can be achieved in(TaSe_(4))2I-metal *** employing a multi-terminal-grounding design,we manage to construct a prototype ferroelectric memristor based on(TaSe_(4))2I with on/off ratio up to 103,endurance over 103 cycles,and good retention *** origin of the ferroelectric surface state is further investigated by first-principles calculations,which reveal an interplay between ferroelectricity and band *** emergence of ferroelectricity in(TaSe_(4))2I not only demonstrates it as a rare but essential case of ferroelectric topological materials,but also opens new routes towards the implementation of topological materials in functional electronic devices.

关键词： Topological semimetal Schottky barrier Surface ferroelectricity Memristor

来源：

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

Mediating role of social support in dysphoria,despondency,and quality of life in patients undergoing maintenance hemodialysis

引用

World Journal of Psychiatry 2024年第3期14卷 409-420页

作者： xiang Zhou Hong Jiang Yi-peng Zhou Xiao-Yu Wang Hai-Yan Ren Xue-Fei Tian Qing-Qing Zhang Department of Nephrology People’s Hospital of Xinjiang Uygur Autonomous RegionXinjiang Clinical Research Center for Kidney DiseaseUrumqi 832000Xinjiang Uygur Autonomous RegionChina Department of Endocrinology and Metabolism People’s Hospital of Xinjiang Uygur Autonomous RegionUrumqi 832000Xinjiang Uygur Autonomous RegionChina Section of Nephrology Department of Internal MedicineYale University School of MedicineNew HavenCT 06510United States

BACKGROUND Dysphoria and despondency are prevalent psychological issues in patients undergoing Maintenance Hemodialysis(MHD)that significantly affect their quality of life(QOL).High levels of social support can significantly improve the physical and mental well-being of patients undergoing ***,there is limited research on how social support mediates the relationship between dysphoria,despondency,and overall QOL in patients undergoing *** is imperative to investigate this mediating effect to mitigate dysphoria and despondency in patients undergoing MHD,ultimately enhancing their overall *** To investigate the mediating role of social support in relationships between dysphoria,despondency,and QOL among patients undergoing *** Participants comprised 289 patients undergoing MHD,who were selected using a random sampling *** Social Support Rating Scale,Self-Rating Anxiety Scale,Self-Rating Depression Scale,and QOL Scale were *** analysis was performed to examine the associations between social support,dysphoria,despondency,and QOL in patients undergoing *** assess the mediating impact of social support on dysphoria,despondency,and QOL in patients undergoing MHD,a bootstrap method was *** Significant correlations among social support,dysphoria,despondency,and quality in patients undergoing MHD were observed(all P<0.01).Dysphoria and despondency negatively correlated with social support and QOL(P<0.01).Dysphoria and despondency had negative predictive impacts on the QOL of patients undergoing MHD(P<0.05).The direct effect of dysphoria on QOL was statistically significant(P<0.05).Social support mediated the relationship between dysphoria and QOL,and this mediating effect was significant(P<0.05).Similarly,the direct effect of despondency on QOL was significant(P<0.05).Moreover,social support played a mediating role between despondency and QOL,with a significant mediating effect(P<0.05).CONCLUSION These find

关键词： Maintenance hemodialysis Social support Dysphoria Despondency Quality of life Mediating effect

来源：

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

Implementation of sub-100 nm vertical channel-all-around(CAA) thin-film transistor using thermal atomic layer deposited IGZO channel

引用

Journal of Semiconductors 2024年第7期45卷 40-44页

作者： Yuting Chen Xinlv Duan Xueli Ma peng Yuan Zhengying Jiao Yongqing Shen Liguo Chai Qingjie Luan Jinjuan xiang Di Geng Guilei Wang Chao Zhao Beijing Superstring Academy of Memory Technology Beijing 100176China State Key Laboratory of Fabrication Technologies for Integrated Circuits Institute of MicroelectronicsChinese Academy of SciencesBeijing 100029China

In-Ga-Zn-O(IGZO) channel based thin-film transistors(TFT), which exhibit high on-off current ratio and relatively high mobility, has been widely researched due to its back end of line(BEOL)-compatible potential for the next generation dynamic random access memory(DRAM) application. In this work, thermal atomic layer deposition(TALD) indium gallium zinc oxide(IGZO) technology was explored. It was found that the atomic composition and the physical properties of the IGZO films can be modulated by changing the sub-cycles number during atomic layer deposition(ALD) process. In addition, thin-film transistors(TFTs) with vertical channel-all-around(CAA) structure were realized to explore the influence of different IGZO films as channel layers on the performance of transistors. Our research demonstrates that TALD is crucial for high density integration technology, and the proposed vertical IGZO CAA-TFT provides a feasible path to break through the technical problems for the continuous scale of electronic equipment.

关键词： In-Ga-Zn-O(IGZO) thermal atomic layer deposition vertical channel thin-film transistor

来源：

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

Human iP SC-derived mesenchymal stem cells relieve high blood pressure in spontaneously hypertensive rats via splenic nerve activated choline acetyltransferase-positive cells

引用

Science China Life Sciences 2024年

作者： Zhen Zhang Weijun Huang Xiaoran Zhang Zhecun Wang Manting Xie Bingbing Xie Yiling Wang Xiaoyong Chen Andy peng xiang Qiuling xiang Center for Stem Cell Biology and Tissue Engineering Key Laboratory for Stem Cells and Tissue Engineering Ministry of Education Sun Yat-sen University Department of Physiology Zhongshan School of Medicine Sun Yat-sen University Department of Vascular Surgery the First Affiliated Hospital Sun Yat-sen University

Despite substantial advancements in modern medicine, the management of hypertension remains a major challenge. Stem cell-based therapies have recently demonstrated remarkable efficacy in treating cardiovascular diseases, including hypertension. However, the antihypertensive mechanism of mesenchymal stem cells（MSCs） has not been extensively explored. This study aimed to investigate the role of injected MSCs in regulating blood pressure homeostasis. Our previous study demonstrated that human induced pluripotent stem cellderived mesenchymal stem cells（hiPSC-MSCs） are functional and homogeneous sources for MSC-based therapy. After the injection of hiPSCMSCs, a significant reduction in blood pressure and end target organ inflammation were observed in spontaneously hypertensive rats（SHRs）. Cell tracking assays demonstrated that the injected hiPSC-MSCs accumulated in the spleens of the SHRs. The injected hiPSC-MSCs accumulated adjacent to the splenic nerve, potentially contributing to the antihypertensive effects. Furthermore, the hiPSC-MSCs released abundant glutamate, which acts as a neuromodulator to activate the splenic sympathetic nerve. After inhibition of glutamate synthesis by siRNA, the ability of hiPSC-MSCs to activate sympathetic nerves was significantly diminished. In addition, the antihypertensive effects of hiPSC-MSCs were eliminated after splenic nerve denervation（SND）, underscoring the critical role of the splenic nerve. Moreover, activation of the splenic nerve resulted in increased release of norepinephrine（NE）, which increased the number of choline acetyltransferase-positive（ChAT+） cells in the spleen and peripheral blood. Consequently, the acetylcholine（ACh） produced by elevated ChAT+cells could act as a vasodilator, lowering blood pressure and mitigating inflammation in end target organs. In summary, our findings indicate that hiPSC-MSCs effectively lower blood pressure in hypertension by influencing the splenic nerves and regulating ChAT+cells. The co

关键词：

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Safety and efficacy of a programmed cell death 1 inhibitor combined with oxaliplatin plus S-1 in patients with Borrmann large type III and IV gastric cancers

引用

World Journal of Gastrointestinal Oncology 2024年第4期16卷 1281-1295页

作者： Zhe-Han Bao Can Hu Yan-Qiang Zhang peng-Cheng Yu Yi Wang Zhi-Yuan Xu Huan-Ying Fu xiang-Dong Cheng Department of Interventional Radiology Zhejiang Cancer HospitalHangzhou 310004Zhejiang ProvinceChina Department of Gastric Surgery Zhejiang Cancer HospitalHangzhou 310022Zhejiang ProvinceChina Department of Colonic Surgery Jinhua Central HospitalJinhua 321000Zhejiang ProvinceChina Department of Breast Surgery Lin’an People’s HospitalHangzhou 311300Zhejiang ProvinceChina

BACKGROUND Gastric cancer(GC)is the fifth most common and the fourth most lethal malignant tumour in the *** patients are already in the advanced stage when they are diagnosed,which also leads to poor overall *** effect of posto-perative adjuvant chemotherapy for advanced GC is unsatisfactory with a high rate of distant metastasis and local *** To investigate the safety and efficacy of a programmed cell death 1(PD-1)inhibitor combined with oxaliplatin and S-1(SOX)in the treatment of Borrmann large type III and IV *** A retrospective analysis(IRB-2022-371)was performed on 89 patients with Borrmann large type III and IV GCs who received neoadjuvant therapy(NAT)from January 2020 to December *** to the different neoadjuvant treatment regimens,the patients were divided into the SOX group(61 patients)and the PD-1+SOX(P-SOX)group(28 patients).RESULTS The pathological response(tumor regression grade 0/1)in the P-SOX group was significantly higher than that in the SOX group(42.86%vs 18.03%,P=0.013).The incidence of ypN0 in the P-SOX group was higher than that in the SOX group(39.29%vs 19.67%,P=0.05).The use of PD-1 inhibitors was an independent factor affecting tumor regression ***,the use of PD-1 did not increase postoperative complications or the adverse effects of *** A PD-1 inhibitor combined with SOX could significantly improve the rate of tumour regression during NAT for patients with Borrmann large type III and IV GCs.

关键词： Neoadjuvant therapy Immunotherapy Gastric cancer Borrmann type Tumor regression grade

来源：

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

A versatile framework for analyzing galaxy image data by incorporating Human-in-the-loop in a large vision model

引用

Chinese Physics C 2024年第9期48卷 176-187页

作者： Ming-xiang Fu Yu Song Jia-Meng Lv Liang Cao peng Jia Nan Li xiang-Ru Li Ji-Feng Liu A-Li Luo Bo Qiu Shi-Yin Shen Liang-Ping Tu Li-Li Wang Shou-Lin Wei Hai-Feng yang Zhen-Ping Yi Zhi-Qiang Zou National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China College of Electronic Information and Optical Engineering Taiyuan University of TechnologyTaiyuan 030024China School of Astronomy and Space Science University of Chinese Academy of SciencesBeijing 101408China Key lab of Space Astronomy and Technology National Astronomical ObservatoriesBeijing 100101China School of Computer Science South China Normal UniversityGuangzhou 510631China CAS Key Laboratory of Optical Astronomy National Astronomical ObservatoriesBeijing 100101China University of Chinese Academy of Sciences NanjingNanjing 211135China University of Science and Technology Beijing Beijing 100083China Shanghai Astronomical Observatory Chinese Academy of SciencesShanghai 200030China School of Computer and Information Dezhou UniversityDezhou 253023China Faculty of Information Engineering and Automation Kunming University of Science and TechnologyKunming 650500China School of Computer Science and Technology Taiyuan University of Science and TechnologyTaiyuan 30024China School of Mechanical Electrical and Information EngineeringShandong UniversityWeihai 264209China Nanjing University of Posts&Telecommunications Nanjing 210023China School of Science University of Science and Technology LiaoningAnshan 114051China

The exponential growth of astronomical datasets provides an unprecedented opportunity for humans to gain insight into the ***,effectively analyzing this vast amount of data poses a significant *** response,astronomers are turning to deep learning techniques,but these methods are limited by their specific training sets,leading to considerable duplicate *** overcome this issue,we built a framework for the general analysis of galaxy images based on a large vision model(LVM)plus downstream tasks(DST),including galaxy morphological classification,image restoration object detection,parameter extraction,and *** the low signal-to-noise ratios of galaxy images and the imbalanced distribution of galaxy categories,we designed our LVM to incorporate a Human-in-the-loop(HITL)module,which leverages human knowledge to enhance the reliability and interpretability of processing galaxy images *** proposed framework exhibits notable fewshot learning capabilities and versatile adaptability for all the abovementioned tasks on galaxy images in the DESI Legacy Imaging *** particular,for the object detection task,which was trained using 1000 data points,our DST in the LVM achieved an accuracy of 96.7%,while ResNet50 plus Mask R-CNN reached an accuracy of 93.1%.For morphological classification,to obtain an area under the curve(AUC)of~0.9,LVM plus DST and HITL only requested 1/50 of the training sets that ResNet18 *** addition,multimodal data can be integrated,which creates possibilities for conducting joint analyses with datasets spanning diverse domains in the era of multi-messenger astronomy.

关键词： artificial intelligence large vision model human-in-the-loop astronomy galaxies

来源：

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

结合线路雷击故障分析220kV主变中性点绝缘配合缺陷

引用

变压器 2010年第11期47卷 64-67页

作者：彭向阳姚森敬广东省电力科学研究院广东广州510600

介绍了220kV线路雷击故障情况,对中性点绝缘配合方式和继电保护整定时间提出了整改意见。

关键词：变压器中性点过电压保护雷击故障

来源：

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

紫外吸收剂对硅橡胶力学和表面性能的影响研究

引用

武汉理工大学学报 2016年第5期38卷 34-39页

作者：彭向阳王聪罗伟才黄振方鹏飞广东电网公司电力科学研究院广州510080 武汉大学物理科学与技术学院武汉430072

硅橡胶在使用过程中易受紫外辐照作用发生老化,从而影响表面结构和性能。在硅橡胶中加入3种紫外线吸收剂UV-327、UV-531及UVP-788,研究了不同种类及不同用量的紫外吸收剂对硅橡胶及其老化过程的力学性能及表面自由能的影响。结果表明:... 详细信息

硅橡胶在使用过程中易受紫外辐照作用发生老化,从而影响表面结构和性能。在硅橡胶中加入3种紫外线吸收剂UV-327、UV-531及UVP-788,研究了不同种类及不同用量的紫外吸收剂对硅橡胶及其老化过程的力学性能及表面自由能的影响。结果表明:加入紫外吸收剂对硅橡胶样品的拉伸强度、断裂伸长率及邵氏硬度具有较大的影响,其中加入1份紫外吸收剂的硅橡胶的综合力学性能较好;在紫外辐照720h后,未添加紫外吸收剂的硅橡胶表面自由能由原来的20.7mJ/m^2激增到67.0mJ/m^2,其中酸性分量γ+s和碱性分量γ-s均大幅度增加,而加入1份紫外吸收剂的硅橡胶的表面自由能只有小幅度增加,其中加入UV-327和UV-531具有较好的效果。

关键词：硅橡胶紫外吸收剂耐老化性能表面自由能

来源：

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

贵阳市市区7963名儿童青少年血压分布及相关因素分析

引用

实用儿科临床杂志 2010年第11期25卷 835-837页

作者：彭向阳王予川贵州省人民医院儿内科贵阳550002

目的研究贵阳市市区8～17岁儿童青少年血压分布及高血压的发生情况,为防治儿童青少年高血压提供依据。方法对贵阳市市区7963名中小学生进行抽样调查和规范化血压、身高、体质量测量,按照我国肥胖工作组(WGOC)推荐标准,将受检者分为超重... 详细信息

目的研究贵阳市市区8～17岁儿童青少年血压分布及高血压的发生情况,为防治儿童青少年高血压提供依据。方法对贵阳市市区7963名中小学生进行抽样调查和规范化血压、身高、体质量测量,按照我国肥胖工作组(WGOC)推荐标准,将受检者分为超重组、肥胖组、正常体质量组。分析比较血压与体质量指数(BMI)的关系及不同BMI组间高血压的患病率。结果 1.贵阳市市区儿童青少年血压分布与美国、中国上海比较差异有统计学意义(Pa<0.05)。2.直线相关分析结果显示BMI与收缩压(SBP)、舒张压(DBP)呈显著正相关(r=0.520、0.365,Pa<0.01)。3.控制了年龄、性别和身高影响后的偏相关分析结果也显示BMI与SBP、DBP呈显著正相关(r=0.390、0.210,Pa<0.01)。4.不同BMI组间高血压患病率分别为24.49%、10.76%、2.65%,三者比较差异有统计学意义(χ2=555.965,P<0.01)。结论考虑受多种因素影响,不同国家、地区儿童青少年百分位血压分布存在差异。血压与BMI密切相关,超重、肥胖是儿童青少年高血压的重要危险因素,应重视超重、肥胖儿童青少年的行为干预,对防治、减少心血管疾病的发生有重要意义。

关键词：血压体质量指数肥胖超重青少年儿童

来源：

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

Temperature field calculation of rail flash welding

引用

High-Speed Railway 2024年第2期2卷 116-121页

作者： Rui Xu Min Zhang Zhenkun Gao Guo Zhao Wei Ding Shouming Wang peng Zhang xiang Liu Jingjing Li Material Science&Engineering Research Center School of MechanicalElectronic and Control EngineeringBeijing Jiaotong UniversityBeijing 100044China Institute of Metals and Chemistry China Academy of Railway Sciences Group Co.Ltd.Beijing 100081China Department of Industrial and Manufacturing Engineering Pennsylvania State UniversityUniversity ParkPA 16802USA

The forging stage of rail flash welding has a decisive influence on joint strength,and the study of the temperature distribution in the process has an important role in further improving joint *** this paper,three calculation methods for the temperature field are ***,the finite element model of the temperature field before forging rail flash welding is established by using the transient heat module of Ansys software and verified by infrared temperature ***,the temperature distribution of different parts of the rail before flash welding is obtained by using infrared thermal imaging ***,Matlab software is used to calculate the temperature of the non-measured ***,the temperature distribution function along the rail axis is fitted through the temperature measurement *** temperature distribution before the top forging of the rail flash welding can be used to analyze the joint and heat-affected zone organization and properties effectively and to guide the parameter setting and industrial production.

关键词： Flash welding Temperature field Joint strength Software calculation

来源：

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

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：