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Nonvolatile and reconfigurable two-terminal electro-optic duplex memristor based on III-nitride semiconductors

Light(Science & Applications) 2024年第4期13卷 706-716页

作者： Zhiwei Xie Ke Jiang Shanli Zhang Jianwei Ben Mingrui Liu Shunpeng Lv Yang Chen Yuping Jia Xiaojuan Sun Dabing Li State Key Laboratory of Luminescence and Applications Changchun Institute of OpticsFine Mechanics and PhysicsChinese Academy of SciencesDongnanhu Road No.3888Changchun 130033China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesYuquan Road No.19100049 BeijingChina These authors contributed equally:Zhiwei XieKe Jiang

With the fast development of artificial intelligence(AI),Internet of things(IOT),etc,there is an urgent need for the technology that can efficiently recognize,store and process a staggering amount of information.The AlScN material has unique advantages including immense remnant polarization,superior temperature stability and good latticematch to other III-nitrides,making it easy to integrate with the existing advanced III-nitrides material and device technologies.However,due to the large band-gap,strong coercive field,and low photo-generated carrier generation and separation efficiency,it is difficult for AlScN itself to accumulate enough photo-generated carriers at the surface/interface to induce polarization inversion,limiting its application in in-memory sensing and computing.In this work,an electro-optic duplex memristor on a GaN/AlScN hetero-structure based Schottky diode has been realized.This twoterminal memristor shows good electrical and opto-electrical nonvolatility and reconfigurability.For both electrical and opto-electrical modes,the current on/off ratio can reach the magnitude of 104,and the resistance states can be effectively reset,written and long-termly stored.Based on this device,the“IMP”truth table and the logic“False”can be successfully reproduced,indicating the huge potential of the device in the field of in-memory sensing and computing.

关键词： polarization duplex limiting

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duplex kidneys and the risk of urinary tract infection in children

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World Journal of Pediatrics 2022年第2期18卷 144-146页

作者： Chon In Kuok Wun Fung Hui Winnie Kwai Yu Chan Department of Paediatrics Queen Elizabeth Hospital30 Gascoigne RoadKowloonHong KongChina

duplex kidney,also known as duplicated kidney or renal duplication,is a form of congenital anomaly of kidney and urinary tract(CAKUT)characterized by the presence of two pelvicalyceal systems,dividing a kidney into upper and lower pole moieties.The incidence of duplex kidneys has been reported to be 0.8-1.8% in general population[1,2].

关键词： kidney duplex urinary

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Field Evaluation of a duplex RT-RAA Assay for Rapid Detection of SARS-CoV-2--Hebei Province,China,January 2021

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China CDC weekly 2022年第23期4卷 504-508页

作者： Ruiqing Zhang Shunxiang Qi Jiandong Li Shiyou Liu Guangyue Han Xinxin Shen Qi Li Wenbo Xu Xuejun Ma National Institute for Viral Disease Control and Prevention China CDCBeijingChina Hebei Center for Disease Control and Prevention Shijiazhuang CityHebei ProvinceChina Center for Biosafety Mega-Science Chinese Academy of SciencesWuhan CityHubei ProvinceChina

Introduction:Recently,a local cluster epidemic has occurred in Shijiazhuang City,Hebei Province.Failure to promptly identify patients with fever in rural areas was the major reason for this epidemic.Methods:We presented the field evaluation of a new real-time reverse transcription recombinase-aided amplification(RT-RAA)kit incorporating an endogenous internal control in a single-tube format,completed at the Hebei CDC from January 17,2021 to January 27,2021.Results:We evaluated the diagnostic performance of RT-RAA assay using automatic extracted RNA of 808 clinical samples.Compared with reverse transcriptase real-time quantitative PCR(qRT-PCR),RT-RAA kit achieved 92.41%sensitivity,98.78%specificity and a 96.29%coincidence rate,demonstrating an excellent agreement between the RTRAA assay and qRT-PCR assay.Furthermore,58 samples were extracted using a manual extraction method within 5 minutes,but only samples with high nucleic acid concentration(cycle threshold value not higher than 32)could be stably detected.Discussion:The RT-RAA is more suitable to meet the needs of rapid,sensitive,and accurate detection in community-level medical institutions.

关键词： duplex Hebei prompt

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Morphologies of secondary austenite in 2507 duplex stainless steel after heat treatment

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Journal of Iron and Steel Research(International) 2022年第6期29卷 994-1003页

作者： Xiao-han Wu Zhi-gang Song Bao-shun Wang Ming-hua Wu Qi-liang Nai Liang Yao Han Feng Wen-jie Zheng School of Material Science and Engineering University of Science and Technology BeijingBeijing 100083China Special Steel Institute Central Iron&Steel Research InstituteBeijing 100081China Engineering Research Center of High-Performance Nuclear Power Pipe Forming of Zhejiang Province Huzhou 313028ZhejiangChina Yongxing Special Stainless-Steel Co. Ltd.Huzhou 313005ZhejiangChina Zhejiang Jiuli Hi-Tech Metals Co. Ltd.Huzhou 313028ZhejiangChina

The microstructure evolution of secondary austenite in 2507 duplex stainless steel was investigated by means of optical metallography,scanning electron microscopy and confocal scanning laser microscopy.Four types of secondary austenite(γ2)morphologies including partially transformed austenite,grain boundary austenite,Widmannstätten austenite(WA)and intragranular austenite could be formed during cooling after solution treatment.It was concluded that secondary austenite morphology was mainly dependent on cooling rates.Two mechanisms of WA formation were proposed.WA nucleated at grain boundary of ferrite or at the formed phase boundary.Transmission electron microscopy(TEM)analysis displayed that WA grew in parallel to the ferrite.The effects of Cr_(2)N on secondary austenite precipitation were discussed in detail.Once Cr_(2)N was involved,a mechanism was proposed that secondary austenite formed by element diffusion,leading to the migration of the austenite–ferrite interface.Cr_(2)N acted as the nucleation sites forγ2 and provided the nitrogen for the transformation;meanwhile,the precipitation of Cr_(2)N during the rapid cooling was captured by TEM.A process of nucleation followed by diffusion was concluded to be the formation of secondary austenite with no Cr_(2)N precipitated.The decomposition of secondary austenite was also studied,which was found to be a diffusion mechanism followed by displacement in connection with the element distribution.

关键词： Secondary austenite duplex stainless steel Heat treatment Cooling rate Element diffusion

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duplex Detection of Vibrio Cholerae and Vibrio Parahaemolyticus by Real-time Recombinase Polymerase Amplification

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Biomedical and Environmental Sciences 2022年第12期35卷 1161-1165页

作者： LIAO Lei SHI Wen MA Chao TANG Wen Lian QIAN Qi Lan WANG Yu LI Jiao Jiao SHEN Jin Yang JI Jing MA Jin Ming GAO Song Jiangsu Key Laboratory of Marine Pharmaceutical Compound Screening Jiangsu Key Laboratory of Marine Biological Resources and EnvironmentCo-Innovation Center of Jiangsu Marine Bio-industry TechnologySchool of PharmacyJiangsu Ocean UniversityLianyungang 222005JiangsuChina

Vibrio cholerae and Vibrio parahaemolyticus are the two most commonly reported pathogens in seafood[1]. Consuming raw or undercooked seafood contaminated with these two Vibrio species can cause food poisoning, posing the risk of severe gastrointestinal illness and death[2-3]. Therefore,precise and reliable methods for detecting V. cholerae and V. parahaemolyticus contamination in seafood are essential for controlling food safety.

关键词： duplex precise controlling

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Integrated photonic RF self-interference cancellation on a silicon platform for full-duplex communication

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Photonics Research 2023年第10期11卷 1635-1646页

作者： XIUYOU HAN XINXIN SU MENG CHAO XINDI YANG WEIHENG WANG SHUANGLING FU YICHENG DU ZHENLIN WU MINGSHAN ZHAO School of Optoelectronic Engineering and Instrumentation Science Dalian University of TechnologyDalian 116024China

In-band full-duplex(IBFD) technology can double the spectrum utilization efficiency for wireless communications,and increase the data transmission rate of B5G and 6G networks and satellite communications. RF self-interference is the major challenge for the application of IBFD technology, which must be resolved. Compared with the conventional electronic method, the photonic self-interference cancellation(PSIC) technique has the advantages of wide bandwidth, high amplitude and time delay tuning precision, and immunity to electromagnetic interference.Integrating the PSIC system on chip can effectively reduce the size, weight, and power consumption and meet the application requirement, especially for mobile terminals and small satellite payloads. In this paper, the silicon integrated PSIC chip is presented first and demonstrated for IBFD communication. The integrated PSIC chip comprises function units including phase modulation, time delay and amplitude tuning, sideband filtering, and photodetection, which complete the matching conditions for RF self-interference cancellation. Over the wide frequency range of C, X, Ku, and K bands, from 5 GHz to 25 GHz, a cancellation depth of more than 20 dB is achieved with the narrowest bandwidth of 140 MHz. A maximum bandwidth of 630 MHz is obtained at a center frequency of10 GHz. The full-duplex communication experiment at Ku-band by using the PSIC chip is carried out. Cancellation depths of 24.9 dB and 26.6 dB are measured for a bandwidth of 100 MHz at central frequencies of 12.4 GHz and14.2 GHz, respectively, and the signal of interest(SOI) with 16-quadrature amplitude modulation is recovered successfully. The factors affecting the cancellation depth and maximum interference to the SOI ratio are investigated in detail. The performances of the integrated PSIC system including link gain, noise figure, receiving sensitivity, and spurious free dynamic range are characterized.

关键词： communication tuning duplex

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Developing a duplex ARMS-qPCR method to differentiate genotype Ⅰ and Ⅱ African swine fever viruses based on their B646L genes

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Journal of Integrative Agriculture 2023年第5期22卷 1603-1607页

作者： DING Lei-lei REN Tao HUANG Lian-yu Weldu TESFAGABER ZHU Yuan-mao LI Fang SUN En-cheng BU Zhi-gao ZHAO Dong-ming State Key Laboratory for Animal Disease Control and Prevention National High Containment Facilities for Animal Diseases Control and PreventionNational African Swine Fever Para-reference LaboratoryHarbin Veterinary Research InstituteChinese Academy of Agricultural SciencesHarbin 150069P.R.China College of Veterinary Medicine Xinjiang Agricultural UniversityUrumqi 830052P.R.China

Africanswinefever(ASF),causedbythe African swine fever virus (ASFV), is an acute, hemorrhagic, and contagious disease of domestic pigs and wild boars.The disease is notifiable and listed by the World Organization for ... 详细信息

关键词： swine fever duplex

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Risk factors for carotid plaque progression after optimising the risk factor treatment: substudy results of the Atherosclerotic Plaque Characteristics Associated with a Progression Rate of the Plaque and a Risk of Stroke in Patients with the carotid Bifurcation Plaque Study (ANTIQUE)

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Stroke & Vascular Neurology 2022年第2期7卷 132-139页

作者： David Školoudik Petra Kešnerova Tomaš Hrbač David Netuka Jaroslav Vomačka Kateřina Langova Roman Herzig Tomaš Belšan Center for Health Research Faculty of MedicineUniversity of OstravaOstravaCzech Republic Department of Neurology University Hospital OstravaOstravaCzech Republic Department of Neurology Second Faculty of MedicineCharles UniversityPrahaCzech Republic Department of Neurology Motol University HospitalPrahaCzech Republic Department of Neurosurgery Faculty of MedicineUniversity of OstravaOstravaCzech Republic Department of Neurosurgery University Hospital OstravaOstravaCzech Republic Department of Neurosurgery Military University Hospital PraguePrahaCzech Republic Department of Radiological Assistance Faculty of Health SciencesPalacky University OlomoucOlomoucCzech Republic Deaprtment of Radiology University Hospital OlomoucOlomoucCzech Republic Department of Biophysics Faculty of MedicinePalacky University OlomoucOlomoucCzech Republic Department of Neurology University Hospital Hradec KrálovéHradec KraloveCzech Republic Department of Neurology Faculty of Medicine in Hradec KrálovéCharles UniversityHradec KrálovéCzech Republic Department of Radiology Military University Hospital PraguePrahaCzech Republic

Background and aim Carotid plaque progression contributes to increasing stroke risk.The study aims to identify factors influencing carotid plaque thickness progression after changing the preventive treatment to the‘treating arteries instead of risk factors’strategy,that is,change in treatment depending on the progression of atherosclerosis.Methods The study participants who completed sonographic controls over the course of 3 years were enrolled to the analysis.duplex sonography of cervical arteries was performed in 6-month intervals with measurement of carotid plaque thickness.Plaque thickness measurement error(σ)was set as 3 SD.Only evidently stable and progressive plaques(defined as plaque thickness difference between initial and final measurements of˂σand>2σ,respectively)were included to analysis.Univariate and multivariate logistic regression analysis was performed to identify factors influencing plaque progression.Results A total of 1391 patients(466 males,age 67.2±9.2 years)were enrolled in the study.Progressive plaque in at least one carotid artery was detected in 255(18.3%)patients.Older age,male sex,greater plaque thickness,coronary heart disease,vascular surgery/stenting history and smoking were more frequently present in patients with progressive plaque(p˂0.05 in all cases).Multivariate logistic regression analysis identified only the plaque thickness(OR 1.850 for left side,95%CI 1.398 to 2.449;and OR 1.376 for right side,95%CI 1.070 to 1.770)as an independent factor influencing plaque progression.Conclusion Carotid plaque thickness corresponding to stenosis severity is the only independent risk factor for plaque thickness progression after optimising the prevention treatment.

关键词： prevention treatment duplex

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Effect of heat input on austenite microstructural evolution of simulated heat affected zone in 2205 duplex stainless steel

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Journal of Iron and Steel Research(International) 2019年第5期26卷 435-441页

作者： Tian-hai Wu Jian-jun Wang Hua-bing Li Zhou-hua Jiang Chun-ming Liu Hong-yang Zhang Key Laboratory for Anisotropy and Texture of Materials Ministry of Education Northeastern University Shenyang 110819 Liaoning China School of Materials Science and Engineering Northeastern University Shenyang 110819 Liaoning China School of Metallurgy Northeastern University Shenyang 110819 Liaoning China Shenyang Northeastern Institute of Metal Materials Co. Ltd. Shenyang 110108 Liaoning China

The effect of simulated welding thermal cycle on the microstructure and impact toughness of heat affected zone (HAZ) in 2205 duplex stainless steel was investigated by optical microscopy, scanning electron microscopy, transmission electron microscopy and room temperature impact test. The results show that the morphology and volume fraction of austenite change greatly with heat input. The amount of residual austenite and grain boundary austenite (GBA) decreases while Widmanstatten austenite (WA) laths and intergranular austenite increase with the increase in heat input. Only the fine equiaxed austenite exists in the HAZ when the heat input is increased up to 61.8 kJ/cm. WA laths nucleate initially either at the ferrite and GBA phase boundaries or directly in ferrite grains and begin to decompose into diamond-shaped austenite with the heat input larger than 25.2 kJ/cm. The impact toughness shows a non-monotonic variation, which is related to the increase in austenite fraction and the formation and the decomposition of WA laths.

关键词： 2205 duplex stainless steel Simulated heat affected zone Heat input Widmanstatten austenite Impact toughness

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Erosion–corrosion behavior of SAF3207 hyper-duplex stainless steel

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International Journal of Minerals,Metallurgy and Materials 2019年第11期26卷 1415-1426页

作者： Hong-liang Xiang Yu-rui Hu Hua-tang Cao Dong Liu Xuan-pu Dong School of Mechanical Engineering and Automation Fuzhou UniversityFuzhou 350108China Jinjiang Science and Education Park Fuzhou UniversityJinjiang 362251China Department of Advanced Production Engineering Engineering and Technology Institute GroningenUniversity of GroningenNijenborgh 49747AGThe Netherlands State Key Laboratory of Materials Processing and Die&Mould Technology Huazhong University of Science and TechnologyWuhan 430074China

Polarization curves and mass losses of SAF3207 hyper-duplex stainless steel under various conditions were measured.The damaged surfaces after erosion–corrosion tests were characterized by scanning electron microscopy.The results showed that an increase in flow velocity could enhance the electrochemical corrosion and consequently decrease the passivation properties of the steel.The erosion–corrosion damage of the samples increased substantially when the flow velocity exceeded the critical value of 4 m·s^-1.The mass loss rate increased as the sand content increased,reaching a maximum at 7 wt%sand content,corresponding to the most severe electrochemical corrosion damage.When the sand content was increased further,however,the mass loss rate decreased and then tended stable.The mass loss was divided into incubation,sustained,and stationary periods,with a maximum mass loss rate of 12.97 g·h^-1·m^-2 after an erosion period of 2.5 h.The erosion–corrosion mechanism was investigated in detail.

关键词： hyper duplex stainless steel erosion corrosion flow velocity electrochemical corrosion microstructure morphology

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