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Characterization of material mechanical properties using strain correlation method combined with virtual fields method

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Acta Mechanica Sinica 2021年第3期37卷 456-471,I0002页

作者： Yangyang Li Jiaqiang Li Qiyuan Duan Huimin Xie Sheng Liu School of Aerospace Engineering Tsinghua UniversityBeijing 100084China Institute of Technological sciences Wuhan UniversityWuhan 430072China Lab for Hydropower Transients of Ministry of Education School of Power and Mechanical EngineeringWuhan UniversityWuhan 430072China

The isotropic and anisotropic behaviors are considered as the important formats of the constitutive behaviors,and can also be called the global *** improve the identification ability of virtual fields method(VFM)when the global properties are unknown,this paper proposes the strain correlation method(SCM)to determine the global properties before the parameter identification using the ***,the basic principle of SCM is described in ***,the feasibility and accuracy of SCM are verified through the numerical experiments based on the three-point bending configuration and the real experiment of polymethyl methacrylate(PMMA).The influence of the additive Gaussian white noise,local errors in the strain fields,and missing data at the specimen edges on the characterization results are *** results show that the SCM has good noise immunity and lower accuracy requirements for the strain *** an application,the mechanical properties of Ti-6A1-4V alloys fabricated by selective laser melting(SLM)are characterized by the *** results show that the alloys are isotropic,and the isotropic VFM is utilized to determine the mechanical *** using the SCM,the accuracy of identification results can be improved for the isotropic or bidirectional reinforced orthotropic materials when using VFM.

关键词： Global properties Constitutive parameter identification Strain correlation method Virtual fields method

Complementary memtransistors for neuromorphic computing: How, what and why

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Journal of Semiconductors 2024年第6期45卷 64-80页

作者： Qi Chen Yue Zhou Weiwei Xiong Zirui Chen Yasai Wang Xiangshui Miao Yuhui He School of Integrated Circuits Huazhong University of Science and TechnologyWuhan 430074China Department of Electrical and Computer Engineering University of CaliforniaSan DiegoUSA Dipartimento di Elettronica e Informazione and *** Politecnico di MilanoMilanoItaly Department of Applied Physics Hong Kong Polytechnic UniversityHong KongChina

Memtransistors in which the source-drain channel conductance can be nonvolatilely manipulated through the gate signals have emerged as promising components for implementing neuromorphic *** the other side,it is known that the complementary metal-oxide-semiconductor(CMOS)field effect transistors have played the fundamental role in the modern integrated circuit ***,will complementary memtransistors(CMT)also play such a role in the future neuromorphic circuits and chips?In this review,various types of materials and physical mechanisms for constructing CMT(how)are inspected with their merits and need-to-address challenges *** the unique properties(what)and poten-tial applications of CMT in different learning algorithms/scenarios of spiking neural networks(why)are reviewed,including super-vised rule,reinforcement one,dynamic vision with in-sensor computing,*** exploiting the complementary structure-related novel functions,significant reduction of hardware consuming,enhancement of energy/efficiency ratio and other advan-tages have been gained,illustrating the alluring prospect of design technology co-optimization(DTCO)of CMT towards neuro-morphic computing.

关键词： complementary memtransistor neuromorphic computing reward-modulated spike timing-dependent plasticity remote supervise method in-sensor computing

Sedimentary characteristics and implications for hydrocarbon exploration in a retrograding shallow-water delta:An example from the fourth member of the Cretaceous Quantou Formation in the Sanzhao depression,Songliao Basin,NE China

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Petroleum science 2022年第3期19卷 929-948页

作者： Quan-Sheng Cai Ming-Yi Hu Yi-Ni Liu Oumar-Ibrahima Kane Qing-Jie Deng Zhong-Gui Hu Hua Li Ngong-Roger Ngia School of Geosciences Yangtze UniversityWuhanHubei 430100China Key Laboratory of Exploration Technologies for Oil and Gas Resources Ministry of EducationYangtze UniversityWuhanHubei 430100China Department of Geology University of BueaP.O.Box.63BueaCameroon

Based on the analysis of core,logging,and testing data,the fourth member of the Cretaceous Quantou Formation(K_(2)q^(4))in the Sanzhao depression,Songliao Basin,is investigated in order to understand the sedimentary characteristics and hydrocarbon exploration significance of a retrograding shallow-water *** results show that during the sedimentary period of K_(2)q^(4),the Sanzhao depression with a gentle basement experienced stable tectonic subsidence and suffered a long-term lake level rise caused by paleoclimate changes(from semiarid to semihumid),the K_(2)q^(4)in the study area were dominated by a fining-upward deltaic succession and had relatively stable *** the bottom to the top,the color of mudstone gradually changes from purplish-red to gray and grayish-green,the contents of caliche nodules decrease gradually,while the presence of pyrite in sediments becomes *** sandstones mainly composed of siltstone and fine sandstone with developed high-energy sedimentary structures constitute the main sand bodies of deltaic deposits,but the scale of channel sandstones decrease *** the long-term lake level rise and fining-upward sedimentary succession,purplish-red mudstone,caliche nodules and thin channel sandstones are still broadly distributed in the study area,and thin channel sandstones can be found at the top of K_(2)q^(4)covered by the black oil shale of Qingshankou *** assertations suggest that the study area was dominated by retrograding shallow-water delta deposits during the sedimentary period of K_(2)q^(4).In comparison with modern Poyang Lake,we infer that during the sedimentary period of K_(2)q^(4),the study area experienced frequent lake level fluctuations triggered by paleoclimate changes despite the long-term lake level rise,and the lake level fluctuations control the deposition of retrograding shallow-water *** addition,most of the thin channel sandstones distributed at the top of K_(2)q^(4)and cove

关键词： Depositional environment Retrograding shallow-water delta Lake level fluctuation Channel sandstone Hydrocarbon exploration K_(2)q^(4) Songliao Basin

Application and Development of Intelligent Medicine in Traditional Chinese Medicine

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Current Medical science 2021年第6期41卷 1116-1122页

作者： Yu-yu DUAN Peng-ran LIU Tong-tong HUO Song-xiang LIU Song YE Zhe-wei YE hubei University of Chinese Medicine Wuhan 430072China Department of Orthopedics Union HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430022China hubei Provincial Hospital of Traditional Chinese Medicine Wuhan 430060China

As modern science and technology constantly progresses,the fields of artificial intelligence,mixed reality technology,remote technology,*** rapidly ***,these technologies have been gradually applied to the medical field,leading to the development of intelligent ***’s more,intelligent medicine has greatly promoted the development of traditional Chinese medicine(TCM),causing huge changes in the diagnosis of TCM ailments,remote treatment,teaching,***,there are both opportunities and challenges for inheriting and developing ***,the related research progress of intelligent medicine in the TCM in China and abroad over the years is analyzed,with the purpose of introducing the present application status of intelligent medicine in TCM and providing reference for the inheritance and development of TCM in a new era.

关键词： intelligent medicine traditional Chinese medicine development

An autoencoder-based feature level fusion for speech emotion recognition

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Digital Communications and Networks 2024年第5期10卷 1341-1351页

作者： Peng Shixin Chen Kai Tian Tian Chen Jingying National Engineering Research Center for E-Learning National Engineering Laboratory for Educational Big DataCentral China Normal UniversityHubei430079China

Although speech emotion recognition is challenging,it has broad application prospects in human-computer *** a system that can accurately and stably recognize emotions from human languages can provide a better user ***,the current unimodal emotion feature representations are not distinctive enough to accomplish the recognition,and they do not effectively simulate the inter-modality dynamics in speech emotion recognition *** paper proposes a multimodal method that utilizes both audio and semantic content for speech emotion *** proposed method consists of three parts:two high-level feature extractors for text and audio modalities,and an autoencoder-based feature *** audio modality,we propose a structure called Temporal Global Feature Extractor(TGFE)to extract the high-level features of the timefrequency domain relationship from the original speech *** that text lacks frequency information,we use only a Bidirectional Long Short-Term Memory network(BLSTM)and attention mechanism to simulate an intra-modal *** these steps have been accomplished,the high-level text and audio features are sent to the autoencoder in parallel to learn their shared representation for final emotion *** conducted extensive experiments on three public benchmark datasets to evaluate our *** results on Interactive Emotional Motion Capture(IEMOCAP)and Multimodal EmotionLines Dataset(MELD)outperform the existing ***,the results of CMU Multi-modal Opinion-level Sentiment Intensity(CMU-MOSI)are ***,experimental results show that compared to unimodal information and autoencoderbased feature level fusion,the joint multimodal information(audio and text)improves the overall performance and can achieve greater accuracy than simple feature concatenation.

关键词： Attention mechanism Autoencoder Bimodal fusion Emotion recognition

AIDEDNet:anti-interference and detail enhancement dehazing network for real-world scenes

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Frontiers of Computer science 2023年第2期17卷 225-235页

作者： Jian ZHANG Fazhi HE Yansong DUAN Shizhen YANG School of Computer science Wuhan UniversityWuhan 430072China College of Sport Engineering and Information technology Wuhan Sports UniversityWuhan 430079China School of Remote Sensing and Information Engineering Wuhan UniversityWuhan 430072China

The haze phenomenon seriously interferes the image acquisition and reduces image *** to many uncertain factors,dehazing is typically a challenge in image *** most existing deep learning-based dehazing approaches apply the atmospheric scattering model(ASM)or a similar physical model,which originally comes from traditional dehazing ***,the data set trained in deep learning does not match well this model for three ***,the atmospheric illumination in ASM is obtained from prior experience,which is not accurate for dehazing ***,it is difficult to get the depth of outdoor scenes for ***,the haze is a complex natural phenomenon,and it is difficult to find an accurate physical model and related parameters to describe this *** this paper,we propose a black box method,in which the haze is considered an image quality problem without using any physical model such as ***,we propose a novel dehazing equation to combine two mechanisms:interference item and detail enhancement *** interference item estimates the haze information for dehazing the image,and then the detail enhancement item can repair and enhance the details of the dehazed *** on the new equation,we design an antiinterference and detail enhancement dehazing network(AIDEDNet),which is dramatically different from existing dehazing networks in that our network is fed into the haze-free images for ***,we propose a new way to construct a haze patch on the flight of network *** patch is randomly selected from the input images and the thickness of haze is also randomly *** experiment results show that AIDEDNet outperforms the state-of-the-art methods on both synthetic haze scenes and real-world haze scenes.

关键词： dehaze anti-interference detail enhancement network

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Source of silica and its implications for organic matter enrichment in the Upper Ordovician-Lower Silurian black shale in western hubei Province,China:Insights from geochemical and petrological analysis

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Petroleum science 2022年第1期19卷 74-90页

作者： Quan-Sheng Cai Ming-Yi Hu Bao-Min Zhang Ngong Ngia An Liu Rui-Quan Liao Oumar Kane Hai Li Zhong-Gui Hu Qing-Jie Deng Jun-Jun Shen School of Geosciences Yangtze UniversityWuhanHubei 430100China Key Laboratory of Tectonics and Petroleum Resources of Ministry of Education(China University of Geosciences) WuhanHubei 430074China Wuhan Center of China Geological Survey WuhanHubei 430205China Department of Geology University of BueaP.O.Box 63BueaSouthwestCameroon School of Petroleum Engineering Yangtze UniversityWuhanHubei 430100China

To improve the understanding of the relationship between silica source and organic matter accumulation,the origin of silica and its implications for organic matter enrichment in the Upper OrdovicianLower Silurian(O_(3)w-S_(1)l)black shale in western hubei Province in the middle Yangtze area,were investigated through geochemical and petrological *** results show that the O_(3)w-S_(1)l black shale is mainly composed of five lithofacies with varying graptolite abundance,total organic carbon(TOC),and silica *** silica and terrigenous siliciclastic input constitute the main silica sources in O_(3)w-S_(1)l black shale and they exhibit an upward inverse variation trend interpreted to be related to sea-level ***,with the increase in biogenic silica content or decrease in terrigenous siliciclastic input,TOC values in black shale initially rise and then fall,which is different from originally expected simple linear *** infer that organic matter enrichment and the distribution of silica from different origins are controlled by sea-level changes and variations in terrigenous input in a continental shelf with little hydrothermal *** environment with appropriate sea level and terrigenous input should be most favorable for organic matter accumulation,rather than one with excessive high sea level and less terrigenous input.

关键词： Biogenic silica Terrigenous siliciclastic input Organic matter enrichment Black shale Continental shelf Sea-level change Wufeng-Longmaxi formations

Decomposing significant factors of Coulomb stress and its components in injection-induced seismicity

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Journal of Rock Mechanics and Geotechnical Engineering 2024年第12期16卷 4895-4908页

作者： Yao Zhang Qi Li Yongsheng Tan Xiaying Li Yiyan Zhong State Key Laboratory of Geomechanics and Geotechnical Engineering Institute of Rock and Soil MechanicsChinese Academy of SciencesWuhan430071China University of Chinese Academy of sciences Beijing100049China

Injection-induced seismicity has been a focus of industry for decades as it poses great challenges to the associated risk mitigation and hazard *** response surface methodology is integrated into the geo-mechanical model to analyze the effects of multiple factors on induced seismicity during the post shut-in *** investigate the roles of poroelastic stress and pore pressure diffusion and examine the differences in the controlling mechanism between fault damage zones and the fault core.A sensitivity analysis is conducted to rank the selected factors,followed by a Box‒Behnken design to form response surfaces and formulate prediction models for the Coulomb stress and its *** properties significantly affect the potentials of induced seismicity in the fault by changing pore pressure diffusion,which can be influenced by other factors to varying *** stress is greater in pressurized damage zones than in fault cores,and the seismicity rate exhibits a consistent *** stress plays a similar role to pore pressure diffusion in the stability of the fault within the pressurized damage ***,pore pressure diffusion dominates in the fault core due to the low rigidity,which limits the accumulation of elastic energy caused by poroelastic *** slip along the fault core is a critical issue to *** potential for induced seismicity is reduced in the right damage zones as the pore pressure diffusion is blocked by the low-permeability fault ***,poroelastic stressing still occurs,and in deep basements,the poroelastic effect is dominant even without a direct increase in pore *** findings in this study reveal the fundamental mechanisms behind injection-induced seismicity and provide guidance for optimizing injection schemes in specific situations.

关键词： Injection-induced seismicity Poroelastic coupling Response surface Coulomb stress

Epidemiology and genetic diversity of norovirus GII genogroups among children in hubei,China,2017–2019

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Virologica Sinica 2023年第3期38卷 351-362页

作者： Jing Li Lingyao Zhang Wenjing Zou Zhaohui Yang Jianbo Zhan Jing Cheng hubei Provincial Center for Disease Control and Prevention Wuhan430079China Wuhan University of science and technology Wuhan430065China

Norovirus(NoV)is an important cause of viral acute gastroenteritis(AGE).To gain insights into the epidemio-logical characteristics and genetic diversity of NoV among children in hubei,1216 stool samples from children(≤5 years)obtained under AGE surveillance from January 2017 to December 2019 were *** results showed that NoV was responsible for 14.64%of AGE cases,with the highest detection rate in children aged 7-12 months(19.76%).Statistically significant differences were found between male and female infection rates(χ^(2)=8.108,P¼0.004).Genetic analysis of RdRp and VP1 sequences showed that NoV GII genotypes were GII.4 Sydney[P31](34.35%),GII.3[P12](25.95%),GII.2[P16](22.90%),GII.4 Sydney[P16](12.98%),GII.17[P17](2.29%),GII.6[P7]and GII.3[P16](each at 0.76%).GII.17[P17]variants were divided into the Kawasaki323-like lineage and the Kawasaki308-like lineage.A unique recombination event was detected between strains of GII.4 Sydney 2012 and GII.4 Sydney ***,all GII.P16 sequences associated with GII.4/GII.2 ob-tained in hubei were correlated with novel GII.2[P16]variants that re-emerged in Germany in *** site analysis of complete VP1 sequences from all GII.4 variants from hubei identified notable variable residues of antibody *** under continuous AGE surveillance and observation of the antigenic sites of VP1 are important monitoring strategies for emerging NoV strains.

关键词： Norovirus(NoV) Epidemiology Genetic diversity hubei Province