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Design and implementation of dual-mode configurable memory architecture for CNN accelerator

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High Technology Letters 2024年第2期30卷 211-220页

作者：山蕊 LI Xiaoshuo gao xu HUO Ziqing School of Electronic Engineering Xi'an University of Posts and TelecommunicationsXi’an 710121P.R.China

With the rapid development of deep learning algorithms,the computational complexity and functional diversity are increasing ***,the gap between high computational density and insufficient memory bandwidth under the traditional von Neumann architecture is getting *** the algorithmic characteristics of convolutional neural network(CNN),it is found that the access characteristics of convolution(CONV)and fully connected(FC)operations are very *** on this feature,a dual-mode reronfigurable distributed memory architecture for CNN accelerator is *** can be configured in Bank mode or first input first output(FIFO)mode to accommodate the access needs of different *** the same time,a programmable memory control unit is designed,which can effectively control the dual-mode configurable distributed memory architecture by using customized special accessing instructions and reduce the data accessing *** proposed architecture is verified and tested by parallel implementation of some CNN *** experimental results show that the peak bandwidth can reach 13.44 GB·s^(-1)at an operating frequency of 120 *** work can achieve 1.40,1.12,2.80 and 4.70 times the peak bandwidth compared with the existing work.

关键词： distributed memory structure neural network accelerator reconfigurable arrayprocessor configurable memory structure

“PALPATION BY IMAGING”:MAGNETIC RESONANCE ELASTOGRAPHY

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Chinese Medical Sciences Journal 2006年第4期21卷 281-286页

作者： Lei xu Pei-yi gao Imaging Center of Neuroscience Beijing Tiantan Hospital Capital University of Medical Sciences Beijing 100050

Elasticity is an important physical property of human tissues. There is a tremendous difference in elasticity between normal and pathological tissues. Noninvasive evaluation of the elasticity of human tissues would be valuable for clinical practice. Magnetic resonance elastography(MRE)is a recently developed noninvasive imaging technique that can directly visualize and quantitatively measure tissue elasticity. This article reviewed the MRE technique and its current status.

关键词： magnetic resonance imaging elasticity tissue characterization

Antibacterial Activity and Mechanisms of Ethanol Extracts from Scutellaria baicalensis Georgi and Magnolia officinalis against Phytophthora nicotianae

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Phyton-International Journal of Experimental Botany 2023年第7期92卷 1987-1999页

作者： xu gao Ziqi Shen Jinliang xu Min Fan Qiang Li College of Agronomy Hunan Agricultural UniversityChangsha410128China

Phytophthora nicotianae causes substantial economic losses in most countries where tobacco is *** present,the control of *** mainly depends on chemical methods,with considerable environmental and health *** investigated the effects of ethanol extracts from Scutellaria baicalensis Georgi(SBG)and Magnolia officinalis(MO).On mycelial growth,sporangium formation,and zoospore release of *** extracts inhibited the growth of ***,with mycelial growth inhibition rates of 88.92%and 93.92%,respectively,at 40 mg/mL,and EC50 values of 5.39 and 5.74 mg/mL,*** underlying mechanisms were the inhibition of sporangium formation,the reduction of zoospore number,and the destruction of the mycelium *** an SBG extract concentration of 16.17 mg/mL,the inhibition rates for sporangia and zoospores were 98.66%and 99.39%,*** an MO extract concentration of 2.87 mg/mL,the production of sporangia and zoospores was completely *** hyphae treated with the two plant extracts showed different degrees of deformation and *** treated with SBG extract showed adhesion and local swelling,whereas treatment with MO extract resulted in broken *** of the extracts resulted in a good synergistic effect.

关键词： Phytophthora nicotianae bacteriostatic activity Scutellaria baicalensis Georgi Magnolia officinalis

Magmatic Evolution and Mineralization Process of the Super-Large Shihuiyao Rb–Nb–Ta Deposit,Southern Great Xing'an Range,China

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Acta Geologica Sinica(English Edition) 2016年第6期90卷 2275-2276页

作者： ZHOU Zhenhua CHE Hewei MA Xinghua gao xu MLR Key Laboratory of Metallogeny and Mineral Assessment Institute of Mineral ResourcesChinese Academy of Geological Sciences School of Earth Science and Mineral Resources China University of Geosciences

Rare metal ore reserves are an important strategic resource, and their metallogenic mechanism and mineralization studies have also been received widespread international attention.

关键词： In Nb Magmatic Evolution and Mineralization Process of the Super-Large Shihuiyao Rb Ta Deposit,Southern Great Xing’an Range,China

Mild and Highly Selective Preparation of Alkylate Gasoline Promoted by Using Polyetheramine-Based Acidic Ionic Liquid

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China Petroleum Processing & Petrochemical Technology 2020年第2期22卷 64-70页

作者： gao xu Yu Fengli Wang Zhiping Xie Congxia State Key Laboratory Base of Eco-chemical Engineering College of Chemistry and Molecular EngineeringQingdao University of Science and TechnologyQingdao266042 College of Chemical Engineering Qingdao University of Science and TechnologyQingdao266042

A polyetheramine(PEA)-based Br?nsted-acidic ionic liquid(IL)was firstly prepared and used to promote the alkylation of isobutane with isobutene catalyzed by trifluoromethanesulfonic acid(TfOH).PEA-IL not only can resolve the persistent problem of poor solubility of the volatile and refractory reactants,but also can satisfactorily exhibit the separation of the catalyst from product oil for *** PEA-IL/TfOH catalytic system with an adjustable acidity ensures a high alkylate *** the conditions covering a VIL/VTfOH ratio of 10:3,a temperature of 25°C,and a reaction time of 25 min,the C8-product selectivity reaches 86.63%.The PEA-IL/TfOH catalyst can be reused 13 times without a decrease in the catalytic *** many operating cycles,the hydrophobic PEA-IL can be easily regenerated by simply adding *** study provides a green,economic,and highly efficient method for producing high-octane alkylate gasoline.

关键词： alkylation alkylate gasoline trifluoromethanesulfonic acid polyetheramine-based ionic liquid isobutene

Characteristics of Si-PIN nuclear radiation detectors stacked in series and parallel

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Science China(Technological Sciences) 2015年第6期58卷 1091-1095页

作者： gao xu LI FengHua LU Min JIANG Yong LI Cheng Suzhou Institute for Advanced Study University of Science and Technology of China Suzhou Institute of Nano-tech and Nano-bionics Chinese Academy of Sciences CAEP Key Laboratory of Neutron Physics

The silicon-based diodes coated with a thin film of neutron reactive materials have been shown to produce excellent neutron detectors. We have fabricated the thin-film-coated single Si-PIN neutron detectors and stacked ones coupled in series and parallel in this work. The stacked detectors show the advantage of improving the detection efficiency of neutron detecting, which essentially attributes to the increase of the effective detection area. It is shown that the stacked detector in series has more superior performance than the parallel one. This work provides a feasible method to develop solid-state semiconductor neutron detectors with high neutron detection efficiency and high response speed.

关键词： Si-PIN nuclear radiation detectors stack in series and parallel energy resolution

Synthesis and Crystal Structure of (E)-4-(Benzyloxy)-2-(cinnamoyloxy)-N,N,N-trimethyl-4-oxobutan-1-aminium Chloride as a Double-prodrug

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Chinese Journal of Structural Chemistry 2008年第2期27卷 177-182页

作者： GONG Xiao-Wei LI xun LI Wei-Lu gao xu xu Wen-Fang ZHAI Hai-Min College of Pharmacy Shandong University Jinan 250012 China Shandong Medical College Jinan 250002 China Stomatology Hospital Shandong University Jinan 250012 China Qidu Pharmaceutical Co. LTD Zibo 255400 China

A novel hydrochloride quaternary ammonium salt （E）-4-（benzyloxy）-2-（cinnamo- yloxy）-N,N,N-trimethyl-4-oxobutan-l-aminium chloride （Cz3HzgNO4Cl2, Mr = 454.37） has been synthesized via the sequence of acetylation and esterification by using L-carnitine （L-4-N-trimethy- lammonium-3-hydroxybutyric acid, LC） and cinnamic acid as the starting materials, and its crystal structure was determined by single-crystal X-ray diffraction method. The crystal belongs to monoclinic, space group P212121 with a = 10.1670（4）, b = 10.4488（4）, c = 22.9795（11）A, V = 2441.18（18）A3, Z = 4, Dc = 1.236 g/cm3,μ（MoKa） = 0.293 mm-1, F（000） = 960, Flack factor = -0.01（11）, the final R = 0.0489 and wR = 0.1550 for 3350 observed reflections （I 〉 2σ（/）） and R = 0.0953 for all 5648 unique reflections. The crystal structure involves a conjugated system which shows a reverse olefin structure.

关键词： L-caruitine cinnamic acid synthesis crystal structure

Associations of daily sedentary behavior,physical activity,and sleep with irritable bowel syndrome:A prospective analysis of 362,193 participants

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Journal of Sport and Health Science 2024年第1期13卷 72-80页

作者： xu gao Sifan Tian Ninghao Huang Gang Sun Tao Huang Department of Occupational and Environmental Health Sciences School of Public HealthPeking UniversityBeijing 100191China Department of Epidemiology and Biostatistics School of Public HealthPeking UniversityBeijing 100191China Department of Gastroenterology and Hepatology First Medical Center of People's Liberation Army General HospitalBeijing 100853China

Background:Irritable bowel syndrome(IBS)substantially affects quality of life and requires early *** study aimed to elucidate the relationships between IBS and daily behaviors,including sedentary behavior(SB),physical activity(PA),and *** particular,it seeks to identify healthy behaviors to reduce IBS risk,which previous studies have rarely ***:Daily behaviors were retrieved from self-reported data of 362,193 eligible UK Biobank *** cases were determined by self-report or health care data according to RomeⅣ***:A total of 345,388 participants were IBS-free at baseline,during a median follow-up of 8.45 years,19,885 incident IBS cases were *** examined individually,SB and shorter(≤7 h/day)or longer(>7 h/day)sleep duration were each positively associated with increased IBS risk,and PA was associated with lower IBS *** isotemporal substitution model suggested that replacing SB with other activities could provide further protective effects against IBS *** people sleeping≤7 h/day,replacing 1 h of SB with equivalent light PA,vigorous PA,or sleep was associated with 8.1%(95%confidence interval(95%CI):0.901-0.937),5.8%(95%CI:0.896-0.991),and 9.2%(95%CI:0.885-0.932)reduced IBS risk,*** people sleeping>7 h/day,light and vigorous PA were associated with a 4.8%(95%CI:0.926-0.978)and a 12.0%(95%CI:0.815-0.949)lower IBS risk,*** benefits were mostly independent of genetic risk for ***:SB and unhealthy sleep duration are risk factors for IBS.A promising way to mitigate IBS risk for individuals sleeping≤7 h/day and for those sleeping>7 h/day appears to be by replacing SB with adequate sleep or vigorous PA,respectively,regardless of the genetic predisposition of IBS.

关键词： Irritable bowel syndrome Isotemporal substitution model Physical activity Sedentary behavior Sleep

Shock Characteristics and Protective Design of Equipment During Spacecraft Docking Process

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Acta Mechanica Solida Sinica 2023年第6期36卷 837-850页

作者： xu gao Xianxian He Yingying Wu Yifeng Dong Jiajing Huo Ying Li Beijing Institute of Spacecraft System Engineering Beijing 100094China School of Naval Architecture Ocean and Energy Power EngineeringWuhan University of TechnologyWuhan 430064China Institute of Advanced Structure Technology Beijing Institute of TechnologyBeijing 100081China

The shock loads generated by spacecraft during docking can cause functional failure and structural damage to aerospace electronic equipment and even lead to catastrophic flight *** is currently a lack of systematic and comprehensive research on the shock environment of spacecraft electronic equipment due to the diversity and complexity of the shock *** this paper,the validity of the finite element model is verified based on the sinusoidal vibration experiment results of the spacecraft reentry *** method of shock dynamic response analysis is used to obtain the shock environment of electronic equipment under different shock *** shock response spectrum is used to describe the shock environment of aerospace electronic *** results show that the resonance frequency error between the sinusoidal vibration experiment and the model is less than 4.06%.When the docking relative speed of the reentry capsule is 2 m/s,the shock response spectrum values of one of the equipment are 30 m^(2)/s,0.67 m/s,and 0.059 m,*** wire rope spring on the mating surface can provide vibration isolation and shock *** increase in spring damping coefficient results in a decrease in the amplitude and time of the vibration *** increase in spring stiffness reduces the input of shock load within a certain *** research results can provide guidance for the design and evaluation of shock environmental adaptability of aerospace electronic equipment.

关键词： Shock environment Shock response spectrum Spacecraft docking Protective design