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中国物理B:英文版 2023年第9期32卷 455-462页

作者：王妍琪张传钊张金权李松巨濛孙伟国豆喜龙金园园 Department of Physics and Optoelectronic engineering Yangtze UniversityJingzhou 434023China School of Physical Science and Technology Southwest UniversityChongqing 400715China College of Physics and Electronic Information Luoyang Normal UniversityLuoyang 471022China institute of Atomic and Molecular Physics Sichuan UniversityChengdu 610065China

High pressure is an effective method to induce structural and electronic changes,creating novel high-pressure structures with excellent physical and chemical ***,we investigate the structural phase transition of hafnium dihydrogen(HfH2)in a pressure range of 0 GPa-500 GPa through the first-principles calculations and the crystal structure analysis by particle swarm optimization(CALYPSO)*** high-pressure phase transition sequence of HfH2is I4/mmm→Cmma→P-3m1 and the two phase transition pressure points are 220.21 GPa and 359.18 GPa,respectively.A newly trigonal P-3m1 structure with 10-fold coordination first appears as an energy superior structure under high *** three structures are all metallic with the internal ionic bonding of Hf and H ***,the superconducting transition temperature(Tc)values of Cmma at 300 GPa and P-3m1 at 500 GPa are 3.439 K and 19.737 K,***,the superconducting transition temperature of the P-3m1 structure presents an upward trend with the pressure rising,which can be attributed to the increase of electron-phonon coupling caused by the enhanced Hf-d electronic density of states at Fermi level under high pressure.

关键词： transition metal dihydrogen first principles phase transition superconducting transition temperature

Quantitative analysis on microstructure and high temperature fracture mechanism of 2.6vol%TiBw/Ti6Al4V composites with equiaxed microstructure after heat treatment

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Journal of Central South University 2021年第8期28卷 2307-2319页

作者： PAN Jin-qi ZHANG Wen-cong YANG Jian-lei CHEN Wen-zhen CUI Guo-rong School of Materials Science and engineering Harbin Institute of Technology(Weihai)Weihai 264209China

In this paper,the 2.6 vol%TiBw/Ti6Al4V composites with network architecture were fabricated by hot press sintering(HPS)at 1100℃ for 1 h,and the quantitative relationships between phases and heat treatment temperatures were *** results showed that the volume fraction phases changed linearly with a range of solution temperature(930-1010℃)and aging temperature(400-600℃).Moreover,the composites with equiaxed microstructure were obtained due to the static recrystallization after solution treated at 950℃ for 1 h and aging treated at 600℃ for 12 *** ultimate high temperature tensile strengths were 772,658,392 and 182 MPa,and the elongations were 9.1%,12.5%,28.6%and 35.3%at 400,500,600 and 700℃,*** addition,fractured morphology analysis indicated the excellent strengthening effect of TiBw at a temperature below 600℃.However,the strengthening effect was significantly reduced due to the debonding of matrix and TiBw at 700℃ and caused the cracks to propagate along the grain boundary.

关键词： titanium matrix composites(TMCs) heat treatment mechanical properties microstructure evolution

Van der Waals materials-based floating gate memory for neuromorphic computing

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Chip 2023年第4期2卷 27-44页

作者： Qianyu Zhang Zirui Zhang Ce Li Renjing Xu Dongliang Yang Linfeng Sun Centre for Quantum Physics Key Laboratory of Advanced Optoelectronic Quan-tum Architecture and Measurement(MOE)School of PhysicsBeijing Institute of TechnologyBeijing 100081China Beijing Key Lab of Nanophotonics&Ultra-fine Optoelectronic Systems School of PhysicsBeijing Institute of TechnologyBeijing 100081China Thrust of Microelectronics of Function Hub The Hong Kong University of Science and Technology(Guangzhou)Guangzhou 511400China

With the advent of the“Big Data Era”,improving data storage density and computation speed has become more and more urgent due to the rapid growth in different types of *** memory with a floating gate(FG)structure is attracting great attention owing to its advantages of miniaturization,low power consumption and reli-able data storage,which is very effective in solving the problems of large data capacity and high integration ***,the FG memory with charge storage principle can simulate synaptic plasticity perfectly,breaking the traditional von Neumann computing ar-chitecture and can be used as an artificial synapse for neuromorphic computations inspired by the human *** many candidate materials for manufacturing devices,van der Waals(vdW)materials have attracted widespread attention due to their atomic thickness,high mobility,and sustainable miniaturization *** to the arbitrary stacking ability,vdW heterostructure combines rich physics and potential 3D integration,opening up various possibilities for new functional integrated devices with low power consumption and flexible *** paper provides a comprehensive review of memory devices based on vdW materials with FG structure,including the working principles and typical structures of FG structure devices,with a focus on the introduction of various highperformance FG memories and their versatile applications in neuro-morphic ***,the challenges of neuromorphic devices based on FG structures are also *** review will shed light on the design and fabrication of vdW material-based memory devices with FG engineering,helping to promote the development of practical and promising neuromorphic computing.

关键词： Van der Waals materials Floating gate memory Memristor Neuromorphic computing

ASIP for Elliptic Curve Cryptography Based on VLIW architecture

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China Communications 2010年第4期7卷 161-166页

作者： YANG Xiaohui DAI Zibin ZHANG Jun ZHANG Yongfu institute of Electronic Technology the Information Engineering University Zhengzhou 450004 China

The requirement of the flexible and effective implementation of the Elliptic Curve Cryptography (ECC) has become more and more exigent since its dominant position in the public-key cryptography *** on analyzing the basic structure features of Elliptic Curve Cryptography (ECC) algorithms,the parallel schedule algorithm of point addition and doubling is *** based on parallel schedule algorithm,the Application Specific Instruction-Set Co-Processor of ECC that adopting VLIW architecture is also proposed in this *** coprocessor for ECC is implemented and validated using Altera’s *** experimental result shows that our proposed coprocessor has advantage in high performance and flexibility.

关键词： Elliptic Curve Cryptography Application Specific Instruction-Set Processor VLIW architecture

All VN-graphene architecture derived self-powered wearable sensors for ultrasensitive health monitoring

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Nano Research 2019年第2期12卷 331-338页

作者： Lianghao Yu Yuyang Yi Ting Yao Yingze Song Yiran Chen Qiucheng Li Zhou Xia Nan Wei Zhengnan Tian Baoqing Nie Li Zhang Zhongfan Liu Jingyu Sun College of Energy Soochow Institute for Energy and Materials Innovations (SIEMIS) Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province Soochow University Suzhou 215006 China School of Electronic and Information engineering Soochow University Suzhou 215006 China Center for Nanochemistry (CNC) Beijing Science and Engineering Center for Nanocarbons Beijing National Laboratory for Molecular Sciences College of Chemistry and Molecular Engineering Peking University Beijing 100871 China

The booming of wearable electronics has nourished the progress on developing multifunctional energy storage systems with versatile flexibility, which enable the continuous and steady power supply even under various deformed states. In this sense, the synergy of flexible energy and electronic devices to construct integrative wearable microsystems is meaningful but remains quite challenging by far. Herein, we devise an innovative supercapacitor/sensor integrative wearable device that is based upon our designed vanadium nitride-graphene (VN-G) architectures. Flexible quasi-solid-state VN-G supercapacitor with ultralight and binder-free features deliver a specific capacitance of^53 F·g^-1 with good cycle stability. On the other hand, VN-G derived pressure sensors fabricated throughout a spray-printing process also manifest favorably high sensitivity (40 kPa^-1 at the range of 2-10 kPa), fast response time (~130 ms), perfect skin conformability, and outstanding stability under static and dynamic pressure conditions. In tum, their complementary unity into a self-powered wearable sensor enables the precise detecti on of physiological motions ranging from pulse rate to phonetic recognition, holding promise for in-practical health monitoring applications.

关键词： VN-graphene architecture solid-state supercapacitor pressure sensor self-powered wearable sensor health monitoring

Azole-based Metal Supramolecular Complexes as Medicinal Agents

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Azole-based Metal Supramolecular Complexes as Medicinal Agen...

cDNA Microarray Analysis of Insulin Resistance-associated Genes in Fructose-fed Rats

中国化学会第九届全国有机化学学术会议

作者：程宇 Dinesh Addla 周成合 Laboratory of Bioorganic & Medicinal Chemistry Key Laboratory of Applied Chemistry of Chongqing Municipality School of Chemistry and Chemical Engineering Southwest University CSIR-Indian institute of Chemical Technology Osmania University

＜正＞Azole compounds could easily interact with enzymes,ion channels,carrier proteins,DNA,RNA,*** a variety of noncovalent forces to exert extensive bioactivities including anticancer,antibacterial,antifungal,antitub...

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来源： cnki会议评论

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Agricultural Biotechnology 2018年第4期7卷 93-96,99页

作者： Bo WANG Yuming LI Xuyan ZHAO Shaoxi CAO Yanwei ZHANG Teaching Laboratory Management Center Guizhou Normal CollegeGuiyang 550018China institute of Cardiovascular Disease Pingjin HospitalMedical College of Chinese People s Armed Police ForcesTianjin 300162China Bioengineering institute Key Laboratory of Biomechanics&Tissue Engineering Ministry of EducationChongqing UniversityChongqing 400044China Guizhou Bioresource Development and Utilization Key Laboratory Guiyang 550018China

This study was conducted to investigate the gene expression in fructose-fed rat skeletal muscle by cDNA chip which could provide support to elucidate the molecular mechanisms underlying insulin resistance. The rats were divided into two groups, one of which was normal control and the other was fed with fructose-rich diet. The mRNA was isolated and purified from the skeletal muscle of two groups. The mRNA from two kinds of tissue was reverse transcribed to cDNA with Cy3-dUTP and Cy5-dUTP separately to prepare hybridization probes. The mixed probes were hybridized to cDNA microarray. The microarray was scanned, analyzed and repeated for two times. Among the total 4 096 tested genes, 140 genes were differently expressed, 62 up-regulated,78 down-regulated, the expression of Ptprd and Gilz and multiple genes of oxidative metabolism is associated in insulin resistance. The differential expression of gene may be related to the pathogenesis of insulin resistance.

关键词： cDNA microarray Gene expression profile Insulin resistance Fructose-fed rats

Zero-DCE++Inspired Object Detection in Less Illuminated Environment Using Improved YOLOv5

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Computers, Materials & Continua 2023年第12期77卷 2751-2769页

作者： Ananthakrishnan Balasundaram Anshuman Mohanty Ayesha Shaik Krishnadoss Pradeep Kedalu Poornachary Vijayakumar Muthu Subash Kavitha Centre for Cyber Physical Systems Vellore Institute of Technology(VIT)ChennaiTamil Nadu600127India School of Computer Science and engineering Vellore Institute of Technology(VIT)ChennaiTamil Nadu600127India School of Information and Data Sciences Nagasaki UniversityNagasaki8528521Japan

Automated object detection has received the most attention over the *** cases ranging from autonomous driving applications to military surveillance systems,require robust detection of objects in different illumination ***-of-the-art object detectors tend to fare well in object detection during daytime ***,their performance is severely hampered in night light conditions due to poor *** address this challenge,the manuscript proposes an improved YOLOv5-based object detection framework for effective detection in unevenly illuminated nighttime ***,the preprocessing strategies involve using the Zero-DCE++approach to enhance lowlight *** is followed by optimizing the existing YOLOv5 architecture by integrating the Convolutional Block Attention Module(CBAM)in the backbone network to boost model learning capability and Depthwise Convolutional module(DWConv)in the neck network for efficient compression of network *** Night Object Detection(NOD)and Exclusively Dark(ExDARK)dataset has been used for this *** proposed framework detects classes like humans,bicycles,and *** demonstrate that the proposed architecture achieved a higher Mean Average Precision(mAP)along with a reduction in model size and total parameters,*** proposed model is lighter by 11.24%in terms of model size and 12.38%in terms of parameters when compared to baseline YOLOv5.

关键词： Object detection deep learning nighttime road scenes YOLOv5 DWConv Zero-DCE++ CBAM

Influence of fin architectures on linearity characteristics of AlGaN/GaNFinFETs

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Chinese Physics B 2018年第4期27卷 432-436页

作者： Ting-Ting Liu Kai Zhang Guang-Run Zhu Jian-Jun Zhou Yue-Chan Kong Xin-Xin Yu Tang-Sheng Chen Research Institution China Electronic Equipment ＆ System Engineering Company Beijing 100039 China Science and Technology on Monolithic Integrated Circuits and Modules Laboratory Nanjing Electronic Devices Institute Nanjing 210016 China

We investigate the influence of fin architecture on linearity characteristics of AlGaN/*** is found that the Fin FET with scaled fin dimensions exhibits much flatter Gm characteristics than the one with long fins as well as planar *** to the comparative study,we provide direct proof that source resistance rather than tri-gate structure itself dominates the Gm ***,power measurements show that the optimized FinFET is capable of delivering a much higher output power density along with significant improvement in linearity characteristics than conventional planar *** study also highlights the importance of fin design in GaN-based FinFET for microwave power application,especially high-linearity applications.

关键词： AlGaN/GaNFinFETs output power density linearity characteristics

An Adaptive Obstacle Avoidance Algorithm for Unmanned Surface Vehicle in Complicated Marine Environments

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IEEE/CAA Journal of Automatica Sinica 2014年第4期1卷 385-396页

作者： Rubo Zhang Pingpeng Tang Yumin Su Xueyao Li Ge Yang Changting Shi the College of Computer Science and Technology Harbin Engineering UniversityHarbin 150001China College of Electromechanical and Information Dalian Nationalities University the College of Computer Science and Technology Harbin Engineering UniversityHarbin 150001China Wuhan Second Ship Design and Research institute the National Key Laboratory of Science and Technology on Autonomous Underwater Vehicle Harbin Engineering University

Unmanned surface vehicles(USVs) are important autonomous marine robots that have been studied and gradually applied into practice. However, the autonomous navigation of USVs, especially the issue of obstacle avoidance in complicated marine environment, is still a fundamental problem. After studying the characteristics of the complicated marine environment, we propose a novel adaptive obstacle avoidance algorithm for USVs,based on the Sarsa on-policy reinforcement learning *** proposed algorithm is composed of local avoidance module and adaptive learning module, which are organized by the “divide and conquer” strategy-based architecture. The course angle compensation strategy is proposed to offset the disturbances from sea wind and currents. In the design of payoff value function of the learning strategy, the course deviation angle and its tendency are introduced into action rewards and penalty policies. The validity of the proposed algorithm is verified by comparative experiments of simulations and sea trials in three sea-state marine environments. The results show that the algorithm can enhance the autonomous navigation capacity of USVs in complicated marine environments.

关键词： Algorithm design and analysis Collision avoidance Learning (artificial intelligence) Marine technology Mobile robots Navigation Sea surface Unmanned aerial vehicles “divide and conquer” strategy Sarsa on-policy reinforcement learning algorithm Unmanned surface vehicle adaptive obstacle avoidance algorithm complicated marine environment Obstacle avoidance vehicle UNMANNED sublittoral zone Unmanned Aerial Vehicle Algorithm design and analysis Divide and conquer navigation Marine technology Ground vehicles drone honey bees Collision avoidance algorithms sea surface Mobile robots