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Orbitronics for energy-efficient magnetization switching

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Science China(Information Sciences) 2025年第1期 398-399页

作者： Yuxuan YAO Daoqian ZHU Qingtao xiA Jianing LIANG Yuhao JIANG Zhiyang PENG Jiaxu LI Chen xiAO Renyou XU Wenwen WANG xiantao SHANG Shiyang LU Dapeng ZHU Hong-xi LIU Kaihua CAO Weisheng ZHAO Fert Beijing Institute School of Integrated Circuit Science and Engineering Beihang University National Key Lab of Spintronics Institute of International Innovation Beihang University Qingdao Research Institute Beihang University Truth Memory Corporation

Spin-orbit torque （SOT）,as a promising writing method for magnetic random-access memory （MRAM）,has garnered widespread interest for over a decade [1].Heavy metals,such as β-W,have been broadly adopted as spin current sources,but suffer from phase change at a limited thickness,resulting in a dramatic reduction of the charge-tospin conversion efficiency θSH[2].The thickness limitation leads to stringent etching conditions and large distribution among devices,posing challenges for simultaneously satisfying SOT efficiency,etching-stop margins,and back-end-ofline （BEOL） compatibility.

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Functional Integral Approach to the Transition Temperature of Attractive Interacting Bose Gas in Traps

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Chinese Physics Letters 2004年第7期21卷 1201-1204页

作者： HUGuang-xi DAIxian-xi StateKeyLaboratoryofASIC&System FudanUniversityShanghai200433 DepartmentofPhysics FudanUniversityShanghai200433

The functional integral approach (FIA) is introduced to study the transition temperature of an imperfect Bose gas in traps. An interacting model in quantum statistical mechanics is presented. With the model we study a Bose gas with attractive interaction trapped in an external potential. We obtain the result that the transition temperature of a trapped Bose gas will slightly shift upwards owing to the attractive interacting force. Successful application of the FIA to Bose systems is demonstrated.

关键词： Quantum gases liquids and solids Mathematical physics Statistical physics and nonlinear systems

Infrared radiation simulation of exhaust system by coupling FVM with narrow band k-distribution

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航空动力学报 2012年第1期27卷 25-32页

作者： ZHU xi-juan Eriqitai LI xi-xi WANG Qiang School of Jet Propulsion Beijing University of Aeronautics and AstronauticsBeijing 100191China

A three-dimensional infrared radiation code for exhaust system was developed by the finite volume method coupled with narrow band k-distribution in non-gray absorbing-emitting *** final infrared signature had considered the atmosphere effect,and the simulation values were favorably consistent with testing *** results indicate that the relative errors considering the effect of atmosphere compared with that of the contrary condition reduce by 31%,it shows that when simulating the infrared radiation of the target which is received by the infrared detectors,even the calculation band is in atmospheric windows 3～5 μm,the effect of atmospheric transmission on infrared signature of the target should not be neglected.

关键词： exhaust system infrared radiation(IR) finite volume method(FVM) narrow band k-distribution atmospheric transmission

xi Jin,China CDC’s Chief Expert of Maternal and Child Health

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China CDC weekly 2020年第28期2卷 534-535页

作者： Peter Hao xi Jin xiaoqi Wang Zhenjun Li Jingjing xi Feng Tan Chinese Center for Disease Control and Prevention BeijingChina National Center for Women and Children’s Health Chinese Center for Disease Control and PreventionBeijingChina

Editorial Our new column Profiles is a new series that aims to introduce China CDC’s chief experts,major decisionmakers,and key contributors that ensure the high standard of operation of China *** articles are meant to present high-achieving individuals of China CDC and will describe the background,achievements,and paths to success of the eponymous individuals.

关键词： Profiles CDC Expert

Regular Disjunction-Free Default Theories

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Journal of Computer Science & Technology 2004年第3期19卷 329-340页

作者： xi-ShunZhao InstituteofLogicandCognition SunYat-SenUniversityGuangzhou510275P.R.China

In this paper, the class of regular disjunction-free default theories is introduced and investigated. A transformation from regular default theories to normal default theories is established. The initial theory and the transformed theory have the same extensions when restricted to old variables. Hence, regular default theories enjoy some similar properties (e.g., existence of extensions, semi-monotonicity) as normal default theories. Then, a new algorithm for credulous reasoning of regular theories is developed. This algorithm runs in a time not more than O(1.45(n)), where n is the number of defaults. In case of regular prerequisite-free or semi-2CNF default theories, the credulous reasoning can be solved in polynomial time. However, credulous reasoning for semi-Horn default theories is shown to be NP-complete although it is tractable for Horn default theories. Moreover, skeptical reasoning for regular unary default theories is co-NP-complete.

关键词： regular disjunction-free default logic extension default reasoning algorithm complexity

THEORETICAL ANALYSES ON DESIGN OF SHEAR EXTRUSION DIE

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中国有色金属学会会刊：英文版 1997年第3期7卷 81-86页

作者： Yuan, xi Central South Univ of Technology Changsha China

ＴＨＥＯＲＥＴＩＣＡＬＡＮＡＬＹＳＥＳＯＮＤＥＳＩＧＮＯＦＳＨＥＡＲＥＸＴＲＵＳＩＯＮＤＩＥ①ＹｕａｎＸｉＤｅｐａｒｔｍｅｎｔｏｆＭａｔｅｒｉａｌｓＳｃｉｅｎｃｅａｎｄＥｎｇｉｎｅｒｉｎｇ，ＣｅｎｔｒａｌＳｏｕｔｈＵ... 详细信息

ＴＨＥＯＲＥＴＩＣＡＬＡＮＡＬＹＳＥＳＯＮＤＥＳＩＧＮＯＦＳＨＥＡＲＥＸＴＲＵＳＩＯＮＤＩＥ①ＹｕａｎＸｉＤｅｐａｒｔｍｅｎｔｏｆＭａｔｅｒｉａｌｓＳｃｉｅｎｃｅａｎｄＥｎｇｉｎｅｒｉｎｇ，ＣｅｎｔｒａｌＳｏｕｔｈＵｎｉｖｅｒｓｉｔｙｏｆＴｅｃｈｎｏ...

关键词： shape extrusion die design element deformation analysis method

2型糖尿病患者心电图PR、QT、QTc间期延长与颈动脉粥样硬化相关性研究

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陕西医学杂志 2025年第1期54卷 71-75页

作者：李丽丽杨敏西安市人民医院心电生理科陕西西安710004

目的:探讨心电图PR、QT、QTc间期延长与2型糖尿病(T2DM)患者发生颈动脉粥样硬化的关系。方法:采用病例对照研究方法,选取97例确诊为T2DM且伴有颈动脉粥样硬化(CAS)的患者作为CAS组,选取确诊为T2DM但颈动脉未发现粥样硬化的95例患者作为... 详细信息

目的:探讨心电图PR、QT、QTc间期延长与2型糖尿病(T2DM)患者发生颈动脉粥样硬化的关系。方法:采用病例对照研究方法,选取97例确诊为T2DM且伴有颈动脉粥样硬化(CAS)的患者作为CAS组,选取确诊为T2DM但颈动脉未发现粥样硬化的95例患者作为对照组,比较两组患者的心电图PR、QT、QTc间期测定值、血糖血脂等,采用多因素分析方法探讨心电图PR、QT、QTc间期延长与T2DM患者发生颈动脉粥样硬化形成的关系。结果:CAS组患者的PR、QT、QTc时间均长于对照组患者,差异具有统计学意义(均P<0.05);CAS组患者的糖尿病病程长于对照组患者,CAS组患者中合并冠心病的占比高于对照组,差异具有统计学意义(均P<0.05);CAS组患者的血清甘油三酯(TG)、总胆固醇(TC)、高敏感度C-反应蛋白(hs-CRP)、丙氨酸氨基转移酶(ALT)水平均高于对照组患者,差异具有统计学意义(均P<0.05)。PR延长(OR=1.833)、QT延长(OR=1.718)、QTc延长(OR=1.487)、TG增高(OR=1.833)、hs-CRP增高(OR=2.081)、糖尿病病程延长(OR=2.036)是T2DM患者发生颈动脉粥样硬化的独立危险因素(均P<0.05)。结论:T2DM患者心电图PR、QT、QTc间期延长与发生颈动脉粥样硬化密切相关,可以作为早期监测患者颈动脉粥样硬化病变的筛选指标。

关键词：心电图 PR间期 QT间期 QTc间期 2型糖尿病颈动脉粥样硬化

Effect of heat-source geometry on distribution and deposition of particulates in a ventilated chamber

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Particuology 2018年第1期16卷 174-184页

作者： xi Chen School of Civil Engineering and Architecture Henan University of Technology Zhengzhou 450001 Henan China Key Laboratory of Heating and Air Conditioning The Education Department of Henan Province Zhengzhou 450007 Henan China

To investigate the effect of near-wall heat-source shape on particulate motion, the particulate distribu~ tion and deposition in a ventilated chamber with different heat-source configurations were numerically modeled. Using the discrete random walk model of the Lagrangian method, the trajectories of 3200 mono-disperse particulates ranging from 1 to 10 μm with a density of 1400 kg/m3 were tracked. Airflow pattern, temperature fields, the distribution of particulate concentrations, and deposition patterns are calculated and presented. The results show that the shape of a near-wall heat source has an influence on the airflow as well as the temperature field in the chamber and hence affects the particulate distribution and deposition.

关键词： Particle deposition Particle distribution Near-wall heat source Computational fluid dynamicsLagrangian method

Low-dimensional perovskite modified 3D structures for higher-performance solar cells

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Journal of Energy Chemistry 2023年第6期81卷 389-403,I0009页

作者： lili Gao Ping Hu Shengzhong(Frank)Liu College of Metallurgical Engineering Xi’an University of Architecture and TechnologyXi'an 710055ShaanxiChina Dalian Institute of Chemical Physics Chinese Academy of SciencesDalian 116023LiaoningChina School of Materials Science and Engineering Shaanxi Normal UniversityXi’an 710119ShaanxiChina

For solution prepared perovskite solar cells,metal halide perovskite materials with low-dimensional(LD)are flexibly employed in 3D perovskite solar cells to promote efficiency and long-term *** this review,the various structures,properties,and applications of LD perovskites are firstly summarized and *** take advantage of LD materials,LD perovskites are introduced in the 3D bulk and/or the interface between the perovskite thin film and the carrier transporting layer to passivate the gain boundary defects while providing the stability advantage of LD ***,the preparation methods and crystallization control of the LD perovskite layers are discussed in ***,the combined devices using both LD and 3D components are reviewed on the basis of device design,cell structure,interface charge transfer,energy lever alignment,and synergistic improvement of both efficiency and ***,the challenges and expectations are speculated for further development of perovskite solar cells.

关键词： Low-dimensional Structure Perovskite solar cell Efficiency Service stability