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通过研究解密大脑——脑健康的未来

英国医学杂志中文版 2021年第1期24卷 29-32页

作者： david z.wang Lee H Schwamm 钱天翼戴琼海美国凤凰城Barrow Neurological Institute 美国哈佛麻省总医院卒中中心中国腾讯觅影/医疗技术委员会中国清华大学信息学院及脑与认知科学研究院

david z.wang和同事们研究了大脑研究的最新进展,以及它们如何影响大脑疾病的治疗。整个世界都在积极地解决大脑之奥秘,人们已经在了解大脑对人类意识产生中发挥的基本作用以及发现脑疾病的治疗方法方面走了很长一段路。公元前430年希... 详细信息

david z.wang和同事们研究了大脑研究的最新进展,以及它们如何影响大脑疾病的治疗。整个世界都在积极地解决大脑之奥秘,人们已经在了解大脑对人类意识产生中发挥的基本作用以及发现脑疾病的治疗方法方面走了很长一段路。公元前430年希波克拉底的《神圣疾病》(The Sacred Disease)中就有记载,大脑是用来容纳心室的,其主要目的是作为身体从外部呼吸空气的容器和转运点,从而为我们的生命带来喜怒哀乐。

关键词：希波克拉底人类意识脑健康转运点大脑喜怒哀乐

Chassis Coordinated Control for Full X-by-Wire Vehicles-A Review

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Chinese Journal of Mechanical Engineering 2021年第2期34卷 1-25页

作者： Lei zhang zhiqiang zhang zhenpo wang Junjun Deng david G.Dorrell National Engineering Laboratory for Electric Vehicles Beijing Institute of TechnologyBeijing 100081China Collaborative Innovation Center for Electric Vehicles in Beijing Beijing Institute of TechnologyBeijing 100081China School of Electrical and Information Engineering University of the WitwatersrandJohannesburgSouth Africa

An X-by-wire chassis can improve the kinematic characteristics of human-vehicle closed-loop system and thus active safety especially under emergency scenarios via enabling chassis coordinated *** paper aims to provide a complete and systematic survey on chassis coordinated control methods for full X-by-wire vehicles,with the primary goal of summarizing recent reserch advancements and stimulating innovative *** condition identification including driver’s operation intention,critical vehicle states and road adhesion condition and integrated control of X-by-wire chassis subsystems constitute the main framework of a chassis coordinated control *** steering and braking maneuvers,different driving condition identification methods are described in this *** are the trigger conditions and the basis for the implementation of chassis coordinated *** the vehicles equipped with steering-by-wire,braking-by-wire and/or wire-controlled-suspension systems,state-of-the-art chassis coordinated control methods are reviewed including the coordination of any two or three chassis ***,the development trends are discussed.

关键词： X-by-wire systems Chassis coordinated control Driving condition identification Active safety

A non-volatile AND gate based on Al2O3/HfO2/Al2O3 charge-trap stack for in-situ storage applications

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Science Bulletin 2019年第20期64卷 1518-1524页

作者： Jingyu Li Heng zhang Yi Ding Jiayi Li Shuiyuan wang david Wei zhang Peng zhou State Key Laboratory of ASIC and System School of Microelectronics Fudan University

The emergence of two-dimensional(2 D) materials has inspired academia in microelectronics to find a novel device structure to offer a potential technological route for increasing energy efficiency and processing speed for data storage and computing at transistor level. Devices based on 2 D materials include logic gates and memories, each with their own unique features. However, integrating logic function and memory into a single device has barely been studied. Here, we report a non-volatile AND gate based on Al2O3/HfO2/Al2O3 charge-trap stack. The device can store charges after completing logic operation. The ratio of high and low current states during logic operations can exceed 105. The output current states during the logic and memory operations still have a two orders of magnitude distinction after 800 s, indicating that this device possesses the non-volatile characteristic. The device has potential applications for insitu memory applications, which makes it a possible candidate to break the ‘‘memory wall' at transistor level.

关键词： AND gate Non-volatile memory Charge-trap gate stack In-situ memory

Adsorption of methane on biochar for emission reduction in oil and gas fields

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Biochar 2023年第1期5卷 290-301页

作者： Vivien Yoonhee Ko Jinsheng wang lan He david Ryan Xiaojie zhang Christopher Lan Natural Resources Canada CanmetENERGY1 Haanel Dr.OttawaON K1A 1M1Canada FPInnovations 2665 East MallVancouverBC V6T 1Z4Canada Department of Chemical and Biological Engineering University of Ottawa161 Louis Pasteur StreetOttawaON K1N 6N5Canada

To contribute to the reduction of methane emissions,using low-cost biochar as adsorbents for capturing and storing methane in oil and gas fields is *** work presents results of methane adsorption on four biochars made from forestry wastes in comparison with the results of three commercial activated *** the adsorption capacity of the biochars is lower by over 50%than that of the activated carbons,thelow-cost and potential environmental benefits provide the incentive to the ***,it is shown that biochar can store more methane than vessels of compressed gas up to the pressure of 75 bar,suggesting the possibility of avoiding high-pressure gas compression and heavy vessels for cost savings in oil and gas *** thermodynamic and kinetic behaviors of the adsorption are studied and implications for the targeted application are discussed.

关键词： Biochar Adsorbent Methane emissions Greenhouse gas reduction Adsorption behavior

Surface superconductivity in the type Ⅱ Weyl semimetal TaIrTe4

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National Science Review 2020年第3期7卷 579-587页

作者： Ying Xing zhibin Shao Jun Ge Jiawei Luo Jinhua wang zengwei zhu Jun Liu Yong wang zhiying zhao Jiaqiang Yan david Mandrus Binghai Yan Xiong-Jun Liu Minghu Pan Jian wang Department of Materials Science and Engineering College of New Energy and Materials China University of Petroleum International Center for Quantum Materials School of Physics Peking University School of Physics and Information Technology Shaanxi Normal University School of Physics Huazhong University of Science and Technology Wuhan National High Magnetic Field Center Huazhong University of Science and Technology Center of Electron Microscopy State Key Laboratory of Silicon Materials School of Materials Science and Engineering Zhejiang University Department of Materials Science and Engineering University of Tennessee Department of Physics and Astronomy University of Tennessee Materials Science and Technology Division Oak Ridge National Laboratory Department of Condensed Matter Physics Weizmann Institute of Science CAS Center for Excellence in Topological Quantum Computation University of Chinese Academy of Sciences Beijing Academy of Quantum Information Sciences Collaborative Innovation Center of Quantum Matter

The search for unconventional superconductivity in Weyl semimetal materials is currently an exciting pursuit, since such superconducting phases could potentially be topologically non-trivial and host exotic Majorana modes. The layered material TaIrTe4is a newly predicted time-reversal invariant type Ⅱ Weyl semimetal with the minimum number of Weyl points. Here, we report the discovery of surface superconductivity in Weyl semimetal Ta Ir Te4. Our scanning tunneling microscopy/spectroscopy(STM/STS) visualizes Fermi arc surface states of TaIrTe4that are consistent with the previous angle-resolved photoemission spectroscopy results. By a systematic study based on STS at ultralow temperature, we observe uniform superconducting gaps on the sample surface. The superconductivity is further confirmed by electrical transport measurements at ultralow temperature, with an onset transition temperature(Tc) up to 1.54 K being observed. The normalized upper critical field h*(T/Tc) behavior and the stability of the superconductivity against the ferromagnet indicate that the discovered superconductivity is unconventional with the p-wave pairing. The systematic STS, and thickness-and angular-dependent transport measurements reveal that the detected superconductivity is quasi-1 D and occurs in the surface states. The discovery of the surface superconductivity in TaIrTe4provides a new novel platform to explore topological superconductivity and Majorana modes.

关键词： surface superconductivity Weyl semimetal topological superconductivity

Log-periodic quantum magneto-oscillations and discrete-scale invariance in topological material HfTe5

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National Science Review 2019年第5期6卷 914-920页

作者： Huichao wang Yanzhao Liu Yongjie Liu Chuanying Xi Junfeng wang Jun Liu Yong wang Liang Li Shu Ping Lau Mingliang Tian Jiaqiang Yan david Mandrus Ji-Yan Dai Haiwen Liu Xincheng Xie Jian wang International Center for Quantum Materials School of Physics Peking University Department of Applied Physics The Hong Kong Polytechnic University Wuhan National High Magnetic Field Center Huazhong University of Science and Technology High Magnetic Field Laboratory Chinese Academy of Sciences Center of Electron Microscopy State Key Laboratory of Silicon Materials School of Materials Science and Engineering Zhejiang University Materials Science and Technology Division Oak Ridge National Laboratory Department of Materials Science and Engineering University of Tennessee Center for Advanced Quantum Studies Department of PhysicsBeijing Normal University Collaborative Innovation Center of Quantum Matter CAS Center for Excellence in Topological Quantum Computation University of Chinese Academy of Sciences Beijing Academy of Quantum Information Sciences

Discrete-scale invariance（DSI） is a phenomenon featuring intriguing log-periodicity that can be rarely observed in quantum ***, we report the log-periodic quantum oscillations in the longitudinal magnetoresistivity(ρ;) and the Hall traces(ρ;) of Hf Te5 crystals, which reveal the DSI in the transport-coefficients *** oscillations in ρ;and ρ;show the consistent log B-periodicity with a phase *** finding of the log B oscillations in the Hall resistance supports the physical mechanism as a general quantum effect originating from the resonant *** with theoretical simulations, we further clarify the origin of the log-periodic oscillations and the DSI in the topological *** work evidences the universality of the DSI in the Dirac materials and provides indispensable information for a full understanding of this novel phenomenon.

关键词： log-periodic oscillations discrete-scale invariance topological materials Dirac materials magnetoresistance Hall resistance

Effects of Maternal Death on Children Living in the Sagnarigu Municipality

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Hybrid post-processing effects of magnetic abrasive finishing and heat treatment on surface integrity and mechanical properties of additively manufactured Inconel 718 superalloys

Open Journal of Obstetrics and Gynecology（妇产科期刊） 2024年第3期 334页

作者： david z.Kolbila Abdul-Razak Doat david S.Nigarim Wilfred Kwose Sylvanus Kampo

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Journal of Materials Science & Technology 2022年第33期128卷 10-21页

作者： Kun Li Ruijin Ma Ming zhang Wen Chen Xiaobin Li david z.zhang Qian Tang Lawrence E.Murr Jinfeng Li Huajun Cao State Key Laboratory of Mechanical Transmission Chongqing UniversityChongqing 400044China Chongqing Key Laboratory of Metal Additive Manufacturing(3D Printing) Chongqing UniversityChongqing 400044China College of Engineering Mathematics and Physical SciencesUniversity of ExeterNorth Park RoadExeter EX44QFUK W.M.Keck Center for 3D Innovation University of Texas at El PasoEl PasoTX 79968USA Department of Metallurgical Materials and Biomedical EngineeringUniversity of Texas at El PasoEl PasoTX 79968USA Institute of Materials China Academy of Engineering PhysicsMianyang 621908China

Desired microstructure and surface integrity are critical to achieving the high performance of additively manufactured *** the present work,the hybrid post-processes of magnetic abrasive finishing(MAF)and post-heat treatment(HT)were applied to the additively manufactured Inconel718 *** hybrid effects and influencing mechanism on the surface quality and mechanical properties of the additively manufactured samples have been studied *** results show that the MAF process effectively reduces the surface roughness by more than an order of magnitude due to the flexibility and geometric consistency of the magnetic particles and abrasives with the finished *** proper sequence of MAF and HT obtains enhanced mechanical properties for the homogenized-MAF-aged sample with the yield strength of 1147 MPa,the ultimate tensile strength of 1334 MPa,and the elongation of 22.9%,which exceeds the standard wrought *** surface integrity,compressive residual stress field,and grain refinement induced by the MAF and subsequent aging heat treatment increase the cracking resistance and delay the fracture failure,which significantly benefits the mechanical *** MAF process combined with proper post-heat treatment provides an effective pathway to improve the mechanical properties of additively manufactured materials.

关键词： Magnetic abrasive finishing Additive manufacturing Inconel 718 Microstructure–property relationship Heat treatment

miR-200 family expression is downregulated upon neoplastic progression of Barrett's esophagus

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World Journal of Gastroenterology 2011年第8期17卷 1036-1044页

作者： Cameron M Smith david I Watson Mary P Leong George C Mayne Michael z Michael Bas PL Wijnhoven Damian J Hussey Department of Surgery Flinders University Bedford Park Department of Gastroenterology and Hepatology Flinders University Bedford Park Department of Surgery Erasmus Medical Centre

AIM: To investigate miR-200 family expression in Barrett's epithelium, gastric and duodenal epithelia, and esophageal adenocarcinoma. METHODS: Real-time reverse transcriptase-polymerase chain reaction was used to measure miR-200, zEB1 and zEB2 expression. Ingenuity Pathway Analysis of miR-200 targets was used to predict biological outcomes. RESULTS: Barrett's epithelium expressed lower levels of miR-141 and miR-200c than did gastric and duodenal epithelia (P zEB1 and zEB2 expression in Barrett's epithelium and esophageal adenocarcinoma (P < 0.05). CONCLUSION: miR-200 expression might contribute to the anti-apoptotic and proliferative phenotype of Barrett's epithelium and regulate key neoplastic processes in this epithelium.

关键词： miRNA Barrett’s esophagus Esophageal adenocarcinoma miR-200 Epithelial to mesenchymal transition Apoptosis Proliferation Epithelium