检索结果-南通市图书馆

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

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

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

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

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.

关键词：

SSA-over-array(SSoA):A stacked DRAM architecture for nearmemory computing

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of Semiconductors 2024年第10期45卷 42-53页

作者： Xiping Jiang Fujun Bai Song Wang Yixin Guo Fengguo Zuo wenwu xiao Yubing Wang Jianguo Yang Ming Liu Institute of Microelectronics of the Chinese Academy of Sciences Beijing 100029China School of Integrated Circuits University of Chinese Academy of SciencesBeijing 100029China Xi’an UniIC Semiconductors Xi’an 710075China School of Microelectronics University of Science and Technology of ChinaHefei 230026China

Aiming to enhance the bandwidth in near-memory computing,this paper proposes a SSA-over-array(SSoA)*** relocating the secondary sense amplifier(SSA)from dynamic random access memory(DRAM)to the logic die and repositioning the DRAM-to-logic stacking interface closer to the DRAM core,the SSoA overcomes the layout and area limitations of SSA and master DQ(MDQ),leading to improvements in DRAM data-width density and frequency,significantly enhancing bandwidth *** quantitative evaluation results show a 70.18 times improvement in bandwidth per unit area over the baseline,with a maximum bandwidth of 168.296 Tbps/*** believe the SSoA is poised to redefine near-memory computing development strategies.

关键词： near-memory vertical stacking SSA bandwidth density

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

在线全文

学校读者我要写书评

暂无评论

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

Physics based circuit compatible model for hybrid antiferroelectric random access memory

在线全文

学校读者我要写书评

暂无评论

Science China(Information Sciences) 2024年

作者： Qiuxia WU Yue PENG wenwu xiao Wenxuan MA Shuo ZHANG Litao SUN Chunfu ZHANG xiaohua MA Yue HAO School of Microelectronics Xidian University Xi'an UniI C Semiconductors

Since the discovery of HfO2-based ferroelectric (FE) materials in 2011, considerable advancements have been made in material preparation, mechanism research, and device realization [1]. Consequently, these materials a...

关键词：

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

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

在线全文

学校读者我要写书评

暂无评论

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

在线全文

学校读者我要写书评

暂无评论

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

Protective Effects of Overexpression of bcl-xl Gene on Local Cerebral Infarction in Transgenic Mice Undergoing Permanent Occlusion of Middle Cerebral Artery

在线全文

学校读者我要写书评

暂无评论

Journal of Huazhong University of Science and Technology(Medical Sciences) 2008年第1期28卷 56-59页

作者：王芙蓉姜永生张苏明肖文伍朱遂强 Department of Neurology Tongji Hospital Tongji Medical College Huazhong University of Science and Technology

In order to investigate the protective effects of the overexpression of bcl-xl gene on local cerebral infarction in the transgenic mice subject to permanent occlusion of middle cerebral artery, the models of bcl-xl transgenic mice were established and subjected to cerebral infarction by intraluminal occlusion of the middle cerebral artery. The infarct volume and the neurological scores were observed and comparison between the wild type mice and the transgenic mice was made. It was found that the infarct volume and the neurological scores in the transgenic mice were significantly decreased as compared with those in the wild type mice. It was suggested that the overexpression of bcl-xl gene in transgenic mice could reduce the infarct volume and improve the neurological function of the mice.

关键词： bcl-xl gene transgenic mice cerebral infarction