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Resistive switching and artificial synaptic performances of memristor based on low-dimensional bismuth halide perovskites

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Nano Research 2023年第7期16卷 10108-10119页

作者： Feifei Luo Yanzhao Wu Junwei Tong fubo tian Xianmin Zhang Key Laboratory for Anisotropy and Texture of Materials(Ministry of Education) School of Materials Science and EngineeringNortheastern UniversityShenyang 110819China Department of Physics Freie Universität Berlin14195 BerlinGermany State Key Laboratory of Superhard Materials College of PhysicsJilin UniversityChangchun 130012China

Zero-dimensional(0D)-Cs_(3)Bi_(2)I_(9),two-dimensional(2D)-Cs_(3)Bi_(2)Br_(9),and one-dimensional(1D)-Cs3Bi2Cl9 perovskite films have been successfully grown on indium tin oxide(ITO)glass substrates,which were used to fabricate memristors with the structure of Al/Cs_(3)Bi_(2)X_(9)(X=I,Br,and Cl)/ITO *** current three types of memristors exhibited bipolar resistive switching *** the endurance and retention time tests clearly demonstrated the excellent stability of present ***,the ON/OFF ratio of the 0D-Cs_(3)Bi_(2)I_(9)device is close to 104 at the reading voltage of 0.1 V,which is nearly 100 and 1000 times larger than those of the 1D-Cs3Bi2Cl9 device and the 2D-Cs_(3)Bi_(2)Br_(9)device,*** activation energy of halide vacancies in the Cs_(3)Bi_(2)X_(9)(X=I,Br,and Cl)films was calculated using the density functional theory by considering a minimum migration path,demonstrating the dimensionality of the Cs_(3)Bi_(2)X_(9)(X=I,Br,and Cl)film affected the formation and rupture of conductive ***,the short-term plasticity and long-term plasticity of biological synapse were simulated by evaluating the conductance responses of Al/Cs_(3)Bi_(2)X_(9)(X=I,Br,and Cl)/ITO devices under various voltage pulses in *** duration time of long-term plasticity in all the present devices can last for up to 250 *** 0D-Cs_(3)Bi_(2)I_(9)device showed both the highest spikeduration-dependent plasticity and paired-pulse facilitation indexes compared to the other two ***,the 0DCs_(3)Bi_(2)I_(9)device successfully established the associative learning behavior by simulating the Pavlov’s dog experiment.

关键词： perovskite films low-dimension resistive switching artificial synapse

High-efficiency resistive switch and artificial synaptic simulation in antimony-based perovskite devices

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Science China(Technological Sciences) 2023年第4期66卷 1141-1151页

作者： LUO FeiFei WU YanZhao TONG JunWei XU DaKe QIN GaoWu tian fubo ZHANG XianMin Key Laboratory for Anisotropy and Texture of Materials(Ministry of Education) School of Materials Science and EngineeringNortheastern UniversityShenyang 110819China Department of Physics Freie Universitat Berlin14195 BerlinGermany State Key Laboratory of Superhard Materials College of PhysicsJilin UniversityChangchun 130012China

Three kinds of Cs_(3)Sb_(2)X_(9)(X=I,Br,Cl)perovskite films have been prepared to fabricate the resistive memory devices with the structure of Al/Cs_(3)Sb_(2)X_(9)(X=I,Br,Cl)/indium tin oxide(ITO)*** devices exhibited a bipolar resistive switching behavior at room temperature by applying scanning voltage of 0→1→0→-1.8→0 *** switching voltages in the Al/Cs_(3)Sb_(2)X_(9)(X=I,Br,Cl)/ITO devices gradually decreased with the X from I,Br to Cl due to the different migration rates of halide vacancy in perovskite films,which is confirmed by the first-principles calculations of activation *** ON/OFF ratio under the reading voltage of 0.1 V significantly increased up to 100 in the Al/Cs_(3)Sb_(2)Cl_(9)/ITO device,which is nearly 10 and 3 times larger than that of the Al/Cs3Sb2I9/ITO device and the Al/Cs_(3)Sb_(2)Br_(9)/ITO device,*** endurance cycles and retention time of current devices were evaluated,showing the excellent electrical ***,the three kinds of Al/Cs_(3)Sb_(2)X_(9)(X=I,Br,Cl)/ITO device can successfully simulate the short-term plasticity of biological *** Al/Cs_(3)Sb_(2)Cl_(9)/ITO device showed the highest paired-pulsed facilitation index compared with that of other two devices,which was explored for the longterm plasticity and learning experience processes of *** addition,the Al/Cs_(3)Sb_(2)Cl_(9)/ITO device established associative learning behavior by simulating the Pavlov’s dog experiment.

关键词： perovskitefilms resistive switching artificial synapse

Effects of Ziyin Jianghuo Ningxin decoction plus dehydroepiandrosterone and femoston in treatment of patients with menopausal symptoms

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Journal of Traditional Chinese Medicine 2018年第5期38卷 787-796页

作者： Lin Jing Zhu Jun tian fubo Chen Lanting Zhang Yang Wang Yan Wang Mingyan Hans-Jurgen Gober Li Da-jin Wang Ling Laboratory for Reproductive Immunology Hospital &Institute of Obstetrics and GynecologyIBSShanghai Medical CollegeFudan UniversityShanghai 200032China Shanghai Key Laboratory of Female Reproductive Endocrine-related Diseases Shanghai 200011China The Academy of Integrative Medicine of Fudan Uni-versity Shanqhai 200032China Department of Obstetrics and Gynecology Wen-ling People's HospitalWenzhou Medical UniversityWenling 317500China Heilongjiang University of Chinese Medicine Heilongjiang 150040China Department of Pharmacy Kepler University ClinicNeuromed CampusLinzAustria

OBJECTIVE: To determine the therapeutic effect of Ziyin Jianghuo Ningxin Decoction(ZYJHNXD) plus dehydroepiandrosterone(DHEA) and menopausalhormone therapy(MHT) in patients suffering from menopausal symptoms identified as, in terms of Traditional Chinese Medicine, symptom pattern of Yin deficiency with hyperactive ***: Totally 180 postmenopausal women aged 40 to 60 years were assigned into four groups and accepted femoston, femoston with ZYJHNXD,femoston with DHEA, femoston with ZYJHNXD and DHEA therapies, respectively, for three *** questionnaire-based measure instruments included modified Kupperman index(MKI),Hamilton Rating Scale for Anxiety(HAMA), and Hamilton Rating Scale for Depression(HAMD). Follicle-stimulating hormone(FSH), luteinizing hormone(LH), estradiol(E2), 5-hydroxyindole-3-acetic acid(5-HIAA), norepinephrine(NE), dopamine(DA),bone mineral density(BMD), and sleep quality were evaluated before and three months after the ***: In all four groups, the scores of MKI, HAMA, HAMD and the levels of FSH, LH decreased significantly(P < 0.05) after the treatment, while the levels of E2, 5-HIAA, NE, and DA showed obvious elevation(P < 0.05). The group receiving ZYJHNXD and DHEA combined with femoston had superiority in the preservation of bone mineral density and improvement of total sleep time and nighttime sleep time over the other three ***: ZYJHNXD and DHEA combined with MHT therapy have a favorable outcome in managing menopausal symptoms, restoring hormone levels, preventing skeletal rarefaction or osteoporosis,and improving sleep quality for postmenopausal women.

关键词： Menopausal symptoms Menopausal hormone therapy Femoston,Ziyin Jianghuo Ningxin Decoction Dehydroepiandrosterone

A fresh class of superconducting and hard pentaborides

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Matter and Radiation at Extremes 2023年第5期8卷 89-95页

作者： Hui Xie Hong Wang Fang Qin Wei Han Suxin Wang Youchun Wang fubo tian Defang Duan College of Physics and Electronic Engineering Hebei Normal University for NationalitiesChengde 067000China College of Physics and Electronic Engineering Linyi UniversityLinyi 276000China College of Physics Jilin UniversityChangchun 130012China

On the basis of the current theoretical understanding of boron-based hard superconductors under ambient conditions,numerous studies have been conducted with the aim of developing superconducting materials with favorable mechanical properties using boron-rich *** this paper,first-principles calculations reveal the existence of an unprecedented family of tetragonal pentaborides MB_(5)(M=Na,K,Rb,Ca,Sr,Ba,Sc,and Y),comprising B_(20)cages and centered metal atoms acting as stabilizers and electron donors to the boron *** compounds exhibit both superconductivity and high hardness,with the maximum superconducting transition temperature T_(c)of 18.6 K being achieved in RbB5 and the peak Vickers hardness Hv of 35.1 GPa being achieved in KB_(5)at 1 *** combination of these properties is particularly evident in KB_(5),RbB5,and BaB5,with Tc values of∼14.7,18.6,and 16.3 K and H_(v)values of∼35.1,32.4,and 33.8 GPa,*** results presented here reveal that pentaborides can provide a framework for exploring and designing novel superconducting materials with favorable hardness at achievable pressures and even under ambient conditions.

关键词： boride boron superconducting

全麻妇科腹腔镜手术喉罩通气道和气管插管的效果比较

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中国临床医学 2007年第1期14卷 67-69页

作者：田复波黄绍强复旦大学附属妇产科医院麻醉科上海200011

目的:探讨喉罩通气道(LMA)用于妇科腹腔镜手术全麻中的安全性和可行性。方法:择期妇科腹腔镜手术患者50例,随机分为喉罩组(L组,n=25)和气管插管组(T组,n=25)。观察插管(罩)前后、术中气腹和拔管(罩)前后各时间点的平均动脉压(MAP)、心率... 详细信息

目的:探讨喉罩通气道(LMA)用于妇科腹腔镜手术全麻中的安全性和可行性。方法:择期妇科腹腔镜手术患者50例,随机分为喉罩组(L组,n=25)和气管插管组(T组,n=25)。观察插管(罩)前后、术中气腹和拔管(罩)前后各时间点的平均动脉压(MAP)、心率(HR)、呼气末二氧化碳分压(P_(et)CO_2)、气道峰压(Paw)和肺顺应性(C_L)的变化;比较两组第1次置管成功率、术中漏气、胃膨胀程度和术后咽痛等情况。结果:T组导管插入、拔出后的MAP、HR均较其插入和拔出前明显升高(P＜0．05),L组则没有明显变化。气腹后两组P_(et)CO_2和Paw均较气腹前显著升高,C_L较气腹前明显降低,组间比较P_(et)CO_2、Paw、C_L无显著差异。两组第1次置管成功率、术中胃膨胀程度无明显差异。术中L组有4例出现轻度漏气,不影响呼吸管理。术后24h咽痛发生率及严重程度T组明显高于L组(P＜0．05)。结论:喉罩通气道较气管插管对患者生理功能影响小,术后并发症少,可安全用于妇科腹腔镜手术麻醉。

关键词：喉罩通气道气管内插管妇科腹腔镜手术全凭静脉麻醉

Crystal structures and properties of CH4H2 compound under high pressure

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Crystal structures and properties of CH4H2 compound under hi...

A Blockchain-Based Access Control Scheme for Reputation Value Attributes of the Internet of Things

第十三届全国物理力学学术会议

作者： Yunxian Liu Defang Duan fubo tian Xiaoli Huang Da Li Zhonglong Zhao Xiaojing Sha Binhua Chu Huadi Zhang Bingbing Liu tian Cui State Key Laboratory of Superhard Materials College of PhysicsJilin University

Recently,people have emphasized on closed shell systems(***41,H2O2-4,Ar5)that have been found to form a number of new intriguing molecular compounds with molecular hydrogen at accessible high *** exhibit many interesting properties with relevance to many fields,for example,the research storage of hydrogen and the seeking of *** experiments have demonstrated that H2 and CH4 can form different proportions of molecular compounds.1 However,there is no theory research on CH4-H2 *** search and study the possible structures of CH4H2 under different pressure based on density functional theory(DFT).At the same time,the stabilities of structures were verified by mechanics,thermodynamics and kinetics,*** results show that CH4H2 have three stable structures under pressure:P-1,P212121and P21/***,in these phases,CH4 and H2 units keep the characteristics of methane and hydrogen molecules,and there is very weak interaction between CH4and H2 *** addition,P-1 can exist as high volumetric hydrogen density phases at low *** theoretical volumetric hydrogen density is fine at ambient pressure.

关键词： Methane Hydrogen First-principle High pressure Crystal structure

来源： cnki会议评论

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Computers, Materials & Continua 2024年第1期78卷 1297-1310页

作者： Hongliang tian Junyuan tian College of Electrical Engineering Northeast Electric Power UniversityJilin132012China

The Internet of Things(IoT)access controlmechanism may encounter security issues such as single point of failure and data *** address these issues,a blockchain-based IoT reputation value attribute access control scheme is ***,writing the reputation value as an attribute into the access control policy,and then deploying the access control policy in the smart contract of the blockchain system can enable the system to provide more fine-grained access control;Secondly,storing a large amount of resources fromthe Internet of Things in Inter Planetary File System(IPFS)to improve system throughput;Finally,map resource access operations to qualification tokens to improve the performance of the access control *** simulation experiments based on the Hyperledger Fabric *** simulation experimental results,it can be seen that the access control system can achieve more fine-grained and dynamic access control while maintaining high throughput and low time delay,providing sufficient reliability and security for access control of IoT devices.

关键词： Blockchain IoT access control Hyperledger Fabric

Robust adaptive radar beamforming based on iterative training sample selection using kurtosis of generalized inner product statistics

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Journal of Systems Engineering and Electronics 2024年第1期35卷 24-30页

作者： tian Jing ZHANG Wei School of Information and Electronics Beijing Institute of TechnologyBeijing 100081China National Key Laboratory of Electromagnetic Space Security Chengdu 610036China

In engineering application,there is only one adaptive weights estimated by most of traditional early warning radars for adaptive interference suppression in a pulse reputation interval(PRI).Therefore,if the training samples used to calculate the weight vector does not contain the jamming,then the jamming cannot be removed by adaptive spatial *** the weight vector is constantly updated in the range dimension,the training data may contain target echo signals,resulting in signal cancellation *** cope with the situation that the training samples are contaminated by target signal,an iterative training sample selection method based on non-homogeneous detector(NHD)is proposed in this paper for updating the weight vector in entire range *** principle is presented,and the validity is proven by simulation results.

关键词： adaptive radar beamforming training sample selection non-homogeneous detector electronic jamming jamming suppression

Transformer and GAN-Based Super-Resolution Reconstruction Network for Medical Images

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Tsinghua Science and Technology 2024年第1期29卷 197-206页

作者： Weizhi Du Shihao tian Arts&Sciences College Washington University in St.LouisSt.LouisMO 63130USA Department of Electric and Computing Engineering Cornell UniversityIthacaNY 14850USA

Super-resolution reconstruction in medical imaging has become more demanding due to the necessity of obtaining high-quality images with minimal radiation dose,such as in low-field magnetic resonance imaging(MRI).However,image super-resolution reconstruction remains a difficult task because of the complexity and high textual requirements for diagnosis *** this paper,we offer a deep learning based strategy for reconstructing medical images from low resolutions utilizing Transformer and generative adversarial networks(T-GANs).The integrated system can extract more precise texture information and focus more on important locations through global image matching after successfully inserting Transformer into the generative adversarial network for picture ***,we weighted the combination of content loss,adversarial loss,and adversarial feature loss as the final multi-task loss function during the training of our proposed model *** comparison to established measures like peak signal-to-noise ratio(PSNR)and structural similarity index measure(SSIM),our suggested T-GAN achieves optimal performance and recovers more texture features in super-resolution reconstruction of MRI scanned images of the knees and belly.

关键词： super-resolution image reconstruction Transformer generative adversarial network(GAN)