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Impact of polarization switching on the effective carrier mobility of HfZrOx ferroelectric field-effect transistor

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Science China(Information Sciences) 2023年第6期66卷 305-306页

作者： Fenning LIU Yue PENG wenwu xiao Yan LIU xiao YU Genquan HAN School of Microelectronics Xidian University Research Center for Intelligent Chips Xi'an UniIC Semiconductors Hangzhou Institute of Technology Xidian University

Doped-HfO2ferroelectrics have attracted tremendous research interest for non-volatile memory and memory-incomputing applications due to their CMOS compatibility,advantages of non-destructive reading,and low power cons... 详细信息

关键词： Zirconium compounds

Hf0.5Zr0.5O2 1T–1C FeRAM arrays with excellent endurance performance for embedded memory

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Science China(Information Sciences) 2023年第4期66卷 303-304页

作者： wenwu xiao Yue PENG Yan LIU Huifu DUAN Fujun BAI Bing YU Qiwei REN xiao YU Genquan HAN School of Microelectronics Xidian University Xi'an UniIC Semiconductors Research Center for Intelligent Chips Zhejiang Lab Hangzhou Institute of Technology Xidian University

Since the initial report of HfO2-based ferroelectric films in 2011, great attention has been paid to ferroelectric field-effect transistors and ferroelectric random-access memories(FeRAMs)[1–3]. Up to now, many efforts have been devoted to realizing the industrialization of HfO2-based FE films. However, the limited fatigue performance has always been the main problem to be resolved.

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bcl-xl over-expression in transgenic mice reduces cerebral ischemia/reperfusion injury

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Neural Regeneration Research 2008年第11期3卷 1237-1240页

作者： Furong Wang Yongsheng Jiang Yan Liu wenwu xiao Suming Zhang Department of Neurology Tongji Hospital Tongji Medical College Huazhong University of Science and Technology Wunhan 430030Hubei Province China

BACKGROUND： Basal cell lymphoma-extra large （bcl-xl） can inhibit neuronal apoptosis by stabilizing the mitochondrial membrane and suppressing cytochrome C release into the cytoplasm. OBJECTIVE： This study aimed to further investigate the cascade reaction pathway of cellular apoptosis. We established an ischemia/repcrfusion model by middle cerebral artery occlusion （MCAO） in transgenic and wild-type mice, and observed changes in the number and distribution of apoptotic neural cells, differences in cerebral infarct volume, in neurological function score, and in cytochrome C expression in the ischemic cerebral cortex, at different time points, DESIGN AND SETTING： The present gene engineering and cell biology experiment was performed at the Laboratory of Biology, Hubei Academy of Agricultural Sciences and at the Laboratory of Immunology, Tongji Medical College, Huazhong University of Science and Technology. MATERIALS： Male bcl-xl over-expression Kunming mice aged 8 weeks and age-matched male wild-type mice were used for this study. Terminal deoxynucleotidyl transferase biotin-dUTP nick end labeling （TUNEL） kits were purchased from Boliman, France. Cytochrome C antibody and Bcl-x immunohistochemical kit were purchased from PharMingen, USA and Santa Cruz Biotechnology, USA, respectively. METHODS： Following MCAO and reperfusion, apoptosis in the ischemic cerebral cortex was detected by the TUNEL assay. Prior to MCAO and 3 hours after reperfusion, the Bcl-xl protein level in the ischemic cerebral cortex was measured by immunohistochemistry. At 3, 6, 12 and 24 hours after reperfusion, the level of cytochrome C in the ischemic cerebral cortex was examined by western blot analysis. Subsequent to MCAO, cerebral infarct volume measurement and neurological examination were performed. MAIN OUTCOME MEASURES： Neural cell apoptosis and cytochrome C expression in the ischemic cerebral cortex; cerebral infarct volume and neurological function score. RESULTS： Twenty-four hours after rep

关键词： mouse transgenic cerebral infarction proto-oncogene cytochrome C

Phase-stable wide-bandgap perovskites enabled by suppressed ion migration

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Journal of Energy Chemistry 2024年第9期96卷 120-128页

作者： Zhiyu Gao Yu Zhu Jingwei Zhu Cong Chen Zongjin Yi Yi Luo Yuliang Xu Kai Wu Tianshu Ma Fangfang Cao Zijun Chen Fang Yao Juncheng Wang wenwu Wang Chuanxiao xiao Hao Huang Hongxiang Li Qianqian Lin Pei Cheng Changlei Wang Xia Hao Guanggen Zeng Dewei Zhao College of Materials Science and Engineering&Institute of New Energy and Low-Carbon Technology&Engineering Research Center of Alternative Energy Materials and Devices Ministry of EducationSichuan UniversityChengdu 610065SichuanChina School of Optoelectronic Science and Engineering&Collaborative Innovation Center of Suzhou Nano Science and Technology Key Lab of Advanced Optical Manufacturing Technologies of Jiangsu Province&Key Lab of Modern Optical Technologies of Education Ministry of ChinaSoochow UniversitySuzhou 215006JiangsuChina Ningbo Institute of Materials Technology and Engineering Chinese Academy of SciencesNingbo 315201ZhejiangChina Ningbo New Materials Testing and Evaluation Center Co.Ltd Ningbo 315201ZhejiangChina State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structure&School of Resources Environment and MaterialsGuangxi UniversityNanning 530004GuangxiChina Key Lab of Artificial Micro-and Nano-Structures of Ministry of Education of China School of Physics and TechnologyWuhan UniversityWuhan 430072HubeiChina College of Polymer Science and Engineering State Key Laboratory of Polymer Materials EngineeringSichuan UniversityChengdu 610065SichuanChina

Wide-bandgap(>1.7 eV)perovskites suffer from severe light-induced phase segregation due to high bromine content,causing irreversible damage to devices ***,the strategies of suppressing photoinduced phase segregation and related mechanisms have not been fully ***,we report a new passivation agent 4-aminotetrahydrothiopyran hydrochloride(4-ATpHCl)with multifunctional groups for the interface treatment of a 1.77-eV wide-bandgap perovskite film.4-ATpH^(+)impeded halogen ion migration by anchoring on the perovskite surface,leading to the inhibition of phase segregation and thus the passivation of defects,which is ascribed to the interaction of 4-ATpH^(+)with perovskite and the formation of low-dimensional ***,the champion device achieved an efficiency of 19.32%with an open-circuit voltage(V_(OC))of 1.314 V and a fill factor of 83.32%.Moreover,4-ATpHCl modified device exhibited significant improved stability as compared with control *** target device maintained 80%of its initial efficiency after 519 h of maximum power output(MPP)tracking under 1 sun illumination,however,the control device showed a rapid decrease in efficiency after 267 ***,an efficiency of 27.38%of the champion 4-terminal all-perovskite tandem solar cell was achieved by mechanically stacking this wide-bandgap top subcell with a 1.25-eV low-bandgap perovskite bottom subcell.

关键词： Wide-bandgap perovskite Phase segregation lon migration Interface post-treatment All-perovskite tandems

AlphaFold-guided redesign of a plant pectin methylesterase inhibitor for broad-spectrum disease resistance

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Molecular Plant 2024年第9期17卷 1344-1368页

作者： Yeqiang Xia Guangzheng Sun Junhua xiao Xinyi He Haibin Jiang Zhichao Zhang Qi Zhang Kainan Li Sicong Zhang Xuechao Shi Zhaoyun Wang Lin Liu Yao Zhao Yuheng Yang Kaixuan Duan wenwu Ye Yiming Wang Suomeng Dong Yan Wang Zhenchuan Ma Yuanchao Wang Department of Plant Pathology Nanjing Agricultural UniversityNanjingJiangsu 210095China Key Laboratory of Soybean Disease and Pest Control(Ministry of Agriculture and Rural Affairs) Nanjng Agricultural UniversityNanjngJiangsu 210095China Anhui Province Key Laboratory of Crop Integrated Pest Management Anhui Agricultural UniversityHefei 230036China School of Bioengineering Dalian University of TechnologyDalian 116024China State Key Laboratory for Biology of Plant Diseases and Insect Pests Institute of Plant ProtectionChinese Academy of Agricultural SciencesBejing 100193China These authors contributed equally to the article.

Plant cell walls are a critical site where plants and pathogens continuously struggle for physiological *** we show that dynamic remodeling of pectin methylesterification of plant cell walls is a compo-nent of the physiological and co-evolutionary struggles between hosts and pathogens.A pectin methyles-terase(PsPME1)secreted by Phytophthora sojae decreases the degree of pectin methylesterification,thus synergizing with an endo-polygalacturonase(PsPG1)to weaken plant cell *** counter PsPME1-mediated susceptibility,a plant-derived pectin methylesterase inhibitor protein,GmPMl1,protects pectin to maintain a high methylesterification ***1 protects plant cell walls from enzymatic degrada-tion by inhibiting both soybean and *** pectin methylesterases during ***,constitutive expression of GmPMl1 disrupted the trade-off between host growth and defense *** therefore used AlphaFold structure tools to design a modified form of GmPMI1(GmPMI1R)that specifically targets and inhibits pectin methylesterases secreted from pathogens but notfrom *** expression of GmPMi1R enhanced plant resistance to oomycete and fungal *** summary,our work highlights the biochemical modification of the cell wall as an important focal point in the physiological and co-evolutionary conflict between hosts and microbes,providing an important proof of concept that Al-driven structure-based tools can accelerate the development of new strategies for plant protection.

关键词： apoplastic immunity AlphaFold-guided redesign broad-spectrum disease resistance pectin methyl-esteraseinhibitor cell wall

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论自然圣境在生物多样性保护中的作用

林业调查规划 2015年第5期40卷 49-52页

作者：肖文武王兰新西双版纳国家级自然保护区曼稿管理所云南勐海666200 西双版纳国家级自然保护区科研所云南景洪666100

自然圣境是一类特征的生态系统,是由于传统文化信仰的原因而受到崇拜、禁忌和保护的一类特殊自然—人文景观单元,包括山林自然圣境、庙祠人文圣境、名山圣境和水体自然圣境4种类型,在生物多样性保护中发挥着积极的作用,体现在自然圣境... 详细信息

自然圣境是一类特征的生态系统,是由于传统文化信仰的原因而受到崇拜、禁忌和保护的一类特殊自然—人文景观单元,包括山林自然圣境、庙祠人文圣境、名山圣境和水体自然圣境4种类型,在生物多样性保护中发挥着积极的作用,体现在自然圣境对物种与生态系统保护等多个层次上。要做好自然圣境的保护,应将有条件的区域建成保护小区、同时完善村规民约,把民族传统文化与生物多样性保护有机结合,充分发挥当地群众在圣境保护中的主体作用。

关键词：自然圣境生物多样性保护民族传统文化村规民约自然保护小区

野生动物保护廊道规划设计模式探索——以西双版纳自然保护区为例

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山东林业科技 2015年第4期45卷 102-106页

作者：肖文武王兰新西双版纳国家级自然保护区曼稿管理所云南勐海666200 西双版纳国家级自然保护区科研所

生境破碎化对野生动物的交流造成了很大的影响。以西双版纳国家级自然保护区廊道规划设计为例,分析了在廊道规划过程中要遵循的原则,对拟规划的廊道要进行必要的生境因子分析和适应性评价,确定廊道中的关键地段,作为廊道建设中的主要建... 详细信息

生境破碎化对野生动物的交流造成了很大的影响。以西双版纳国家级自然保护区廊道规划设计为例,分析了在廊道规划过程中要遵循的原则,对拟规划的廊道要进行必要的生境因子分析和适应性评价,确定廊道中的关键地段,作为廊道建设中的主要建设区域。为了确保野生动物的通行安全,廊道要有足够的隐蔽和栖息场所,同时也需要人为的种植野生动物喜食植物和建立硝塘等,以引导野生动物更好的利用廊道进行迁徙。

关键词：野生动物廊道规划设计生境破碎化

一种应用于协作MIMO-NOMA系统的符号检测算法

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北京邮电大学学报 2024年第4期47卷 136-142页

作者：谢文武李攀肖健王骥杨亮湖南理工学院信息科学与工程学院岳阳414006 华中师范大学物理科学与技术学院武汉430079 湖南大学信息科学与工程学院长沙410082

受发射端的功率分配与叠加编码的影响,基于单任务神经网络的功率域非正交多址接入(NOMA)符号检测算法无法兼容不同用户的符号检测任务。针对用户辅助的协作多输入多输出(MIMO)-NOMA通信系统,设计基于多任务神经网络的符号检测算法,通过... 详细信息

受发射端的功率分配与叠加编码的影响,基于单任务神经网络的功率域非正交多址接入(NOMA)符号检测算法无法兼容不同用户的符号检测任务。针对用户辅助的协作多输入多输出(MIMO)-NOMA通信系统,设计基于多任务神经网络的符号检测算法,通过学习协作MIMO-NOMA系统中信号的深层共享特征,实现不同用户的联合符号检测。由于协作通信中不同用户接收信号的数据分布不同,并且存在数据孤岛问题,而机器学习模型要求训练数据和测试数据均独立采样于同一数据分布,因此提出多任务联邦学习框架来解决这一问题。实验结果表明,随着信噪比的提高,所提出的符号检测算法较传统符号检测算法展现出更好的性能。

关键词：协作非正交多址接入符号检测多任务联邦学习

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多工况下不同叶片包角的斜流泵水力特性研究

水利水电技术 2017年第9期48卷 138-142页

作者：裴迎举宋文武胡帅肖姚候洁西华大学能源与动力工程学院四川成都610039

为研究多工况下不同叶片包角的斜流泵水力特性,在斜流泵叶片包角取值范围内和主要几何参数不变的条件下,对包角为60°、65°、70°、75°和80°的斜流泵模型进行8Q_d、1.0Q_d、1.2Q_d三种流量工况下的数值模拟计算。多维度内部流场分... 详细信息

为研究多工况下不同叶片包角的斜流泵水力特性,在斜流泵叶片包角取值范围内和主要几何参数不变的条件下,对包角为60°、65°、70°、75°和80°的斜流泵模型进行8Q_d、1.0Q_d、1.2Q_d三种流量工况下的数值模拟计算。多维度内部流场分析结果表明:(1)随着流量的增加,叶轮内部流道流场回流漩涡现象减小,效率逐渐提高;(2)截面1中在设计流量Q_d条件下,随包角(60°~70°)的增大,最大压力值逐渐减小,叶片流道扩散和逆压梯度降低,水力特性整体较优;(3)在(70°~80°)范围内压力最大值依次减小,摩擦阻力也随之增加,叶片包角存在一个最优值;(4)截面2中70°、75°和80°三种叶片包角方案速度矢量值随着流量Q的增加逐渐增大,在60°和65°方案下无明显变化规律。研究成果为叶轮叶片包角的综合评估和选择提供参考。

关键词：斜流泵多工况叶片包角水力特性摩擦阻力