期刊文献+
任意字段
题名或关键词
题名
关键词
摘要
作者
第一作者
机构
刊名
分类号
参考文献
作者简介
基金资助
栏目信息
共找到6,448篇文章
< 1 2 … 250 >
每页显示 20 50 100
已选0条
引用分析
参考文献
引证文献
 统计分析
检索结果
已选文献
显示方式：
Unlocking Wavelength-Selective Modulations of Open-Circuit Voltage in Metal Halide Perovskite Solar Cells 认领 引用
1
作者 Younsuk Hu Jibeom Hong +3 位作者 Kyounguk Cho Wanseung Yoo Doo Hyun Ko Inchan Hwang 《Energy & Environmental Materials》 SCIE EI CAS CSCD 2026年第1期329-340,共12页
The photovoltaic performance of metal halide perovskite solar cells often respond divergently to environmental conditions during storage.In particular,light exposure can either enhance or degrade device efficiency,yet... The photovoltaic performance of metal halide perovskite solar cells often respond divergently to environmental conditions during storage.In particular,light exposure can either enhance or degrade device efficiency,yet the mechanisms underlying these antithetical behaviors are still under investigation.In this study,we explore the modulation of the open-circuit voltage(Voc)in triple-cation mixed-halide perovskite solar cells by systematically controlling storage environments.While light intensity exhibits minimal impact during storage,the spectral composition of illumination selectively enhances Voc comprising reversible and irreversible contributions.Structural characterization reveals that prolonged storage degrades the quality of perovskite crystals in the upper region of the perovskite layer,whereas light storage promotes the relaxation of microstrain at the buried interface with a p-type organic layer.This structural reorganization at the interface,accompanied by lattice expansion,accounts for suppressed nonradiative recombination and a corresponding increase in quasi-Fermi level splitting.Consequently,devices fabricated without chemical defect passivation achieve a power conversion efficiency of higher than 40%under indoor lighting conditions after preconditioned by continuous exposure to ambient light during storage.These findings highlight the critical role of controlled light exposure during storage not only in enhancing efficiency,but also in ensuring reproducibility of perovskite solar cell characterization. 展开更多
关键词 indoor photovoltaics light-induced modulations perovskite solar cells reproducibility strain relaxation
暂未订购 下载PDF
Exact analytical results for a two-level system driven by a pulse with Lorentzian frequency and sub-Lorentzian amplitude modulations 认领 引用
2
作者 Qiong-Tao Xie 《Communications in Theoretical Physics》 SCIE CAS CSCD 2026年第3期65-72,共8页
We investigate the dynamics of a two-level quantum system driven by a laser pulse characterized by Lorentzian frequency and sub-Lorentzian amplitude modulations.Complete analytical solutions,expressed via confluent He... We investigate the dynamics of a two-level quantum system driven by a laser pulse characterized by Lorentzian frequency and sub-Lorentzian amplitude modulations.Complete analytical solutions,expressed via confluent Heun functions,are derived.Our analysis reveals that explicit exact analytical solutions exist under infinite sets of specific parameter conditions.The effects of modulation parameters and initial conditions on the final transition probabilities are examined analytically and numerically.Furthermore,the method is demonstrated to be directly applicable to two closely related models with Lorentzian pulses. 展开更多
关键词 exact analytical solutions Lorentzian frequency modulation sub-Lorentzian amplitude modulation two-level system
暂未订购 下载PDF
Particle modulations to turbulence in two-phase round jets 认领 引用 被引量：1
3
作者 Bing Wang Huiqiang Zhang +2 位作者 Yi Liu Xiaofen Yan Xilin Wang 《Acta Mechanica Sinica》 SCIE EI CAS 2009年第5期611-617,共7页
The particle modulations to turbulence in round jets were experimentally studied by means of two-phase velocity measurements with Phase Doppler Anemometer(PDA).Laden with very large particles,no significant attenuatio... The particle modulations to turbulence in round jets were experimentally studied by means of two-phase velocity measurements with Phase Doppler Anemometer(PDA).Laden with very large particles,no significant attenuations of turbulence intensities were measured in the farfields,due to small two-phase slip velocities and particle Reynolds number.The gas-phase turbulence is enhanced by particles in the near-fields,but it is significantly attenuated by the small particles in the far-fields.The smaller particles have a more profound effect on the attenuation of turbulence intensities.The enhancements or attenuations of turbulence intensities in the far-fields depends on the energy production,transport and dissipation mechanisms between the two phases,which are determined by the particle prop-erties and two-phase velocity slips.The non-dimensional parameter CTI is introduced to represent the change of turbulence intensity. 展开更多
关键词 Particle modulations Turbulence intensity Particle sizes Two-phase slip velocity Particle-laden round turbulent jet
暂未订购 下载PDF
BER Performance of Soft Decision Modulations Based on PCSS System 认领 引用 被引量：2
4
作者 Ming-Duo Liu Li-Li Guo Hong-Lei Li 《Journal of Harbin Institute of Technology(New Series)》 EI CAS 2013年第2期22-26,共5页
Recently,soft decision modulations become the highlight of parallel combinatory spread spectrum ( PCSS) system. Existing soft decision BPSK and APK modulations are given and compared in the thesis. In order to apply s... Recently,soft decision modulations become the highlight of parallel combinatory spread spectrum ( PCSS) system. Existing soft decision BPSK and APK modulations are given and compared in the thesis. In order to apply soft decision QPSK modulation based on PCSS system,the correlation of superposition PN sequences is discussed. A weighted summation algorithm is adopted in QPSK demodulation to recover the whole orthogonal correlation of the superposition sequences; meanwhile the bit error rate of weighting soft decision QPSK modulation is simulated. The simulation results show that the bit error rate performance of proposed soft decision QPSK modulation based on PCSS system is better than that of hard decision modulation. The method proposed can be widely adopted in engineering application. 展开更多
关键词 parallel combinatory spread spectrum system soft decision modulations correlation of superposition PN sequences
暂未订购 下载PDF
Investigation on Analog and Digital Modulations Recognition Using Machine Learning Algorithms 认领 引用
5
作者 Jean Ndoumbe Ivan Basile Kabeina +1 位作者 Gaelle Patricia Talotsing Soubiel-Noël Nkomo Biloo 《World Journal of Engineering and Technology》 2024年第4期867-884,共18页
In the field of radiocommunication, modulation type identification is one of the most important characteristics in signal processing. This study aims to implement a modulation recognition system on two approaches to m... In the field of radiocommunication, modulation type identification is one of the most important characteristics in signal processing. This study aims to implement a modulation recognition system on two approaches to machine learning techniques, the K-Nearest Neighbors (KNN) and Artificial Neural Networks (ANN). From a statistical and spectral analysis of signals, nine key differentiation features are extracted and used as input vectors for each trained model. The feature extraction is performed by using the Hilbert transform, the forward and inverse Fourier transforms. The experiments with the AMC Master dataset classify ten (10) types of analog and digital modulations. AM_DSB_FC, AM_DSB_SC, AM_USB, AM_LSB, FM, MPSK, 2PSK, MASK, 2ASK, MQAM are put forward in this article. For the simulation of the chosen model, signals are polluted by the Additive White Gaussian Noise (AWGN). The simulation results show that the best identification rate is the MLP neuronal method with 90.5% of accuracy after 10 dB signal-to-noise ratio value, with a shift of more than 15% from the k-nearest neighbors’ algorithm. 展开更多
关键词 Automatic Recognition Artificial Neural Networks K-Nearest Neighbors Machine Learning Analog Modulations Digital Modulations
暂未订购 下载PDF
Automatic Classification of Superimposed Modulations for 5G MIMO Two-Way Cognitive Relay Networks 认领 引用 被引量：1
6
作者 Haithem Ben Chikha Ahmad Almadhor 《Computers, Materials & Continua》 SCIE EI 2022年第1期1799-1814,共16页
To promote reliable and secure communications in the cognitive radio network,the automatic modulation classification algorithms have been mainly proposed to estimate a single modulation.In this paper,we address the cl... To promote reliable and secure communications in the cognitive radio network,the automatic modulation classification algorithms have been mainly proposed to estimate a single modulation.In this paper,we address the classification of superimposed modulations dedicated to 5G multipleinput multiple-output(MIMO)two-way cognitive relay network in realistic channels modeled with Nakagami-m distribution.Our purpose consists of classifying pairs of users modulations from superimposed signals.To achieve this goal,we apply the higher-order statistics in conjunction with the Multi-BoostAB classifier.We use several efficiency metrics including the true positive(TP)rate,false positive(FP)rate,precision,recall,F-Measure and receiver operating characteristic(ROC)area in order to evaluate the performance of the proposed algorithm in terms of correct superimposed modulations classification.Computer simulations prove that our proposal allows obtaining a good probability of classification for ten superimposed modulations at a low signal-to-noise ratio,including the worst case(i.e.,m=0.5),where the fading distribution follows a one-sided Gaussian distribution.We also carry out a comparative study between our proposal usingMultiBoostAB classifier with the decision tree(J48)classifier.Simulation results show that the performance of MultiBoostAB on the superimposed modulations classifications outperforms the one of J48 classifier.In addition,we study the impact of the symbols number,path loss exponent and relay position on the performance of the proposed automatic classification superimposed modulations in terms of probability of correct classification. 展开更多
关键词 Automatic classification MIMO two-way cognitive relay network Nakagami-m channels superimposed modulations 5G
暂未订购 下载PDF
Two-coupled structural modulations in charge-density-wave state of SrPt_2As_2 superconductor 认领 引用 被引量：1
7
作者 王莉 王臻 +7 位作者 施洪龙 陈震 蒋复国 田焕芳 杨槐馨 房爱芳 王楠林 李建奇 《Chinese Physics B》 SCIE EI CAS CSCD 2014年第8期193-198,共6页
Transmission electron microscopy （TEM） study of SrPt2As2 reveals two incommensurate modulations appearing in the charge-density-wave （CDW） state below TCDW ≈ 470 K. These two structural modulations can be well ex... Transmission electron microscopy （TEM） study of SrPt2As2 reveals two incommensurate modulations appearing in the charge-density-wave （CDW） state below TCDW ≈ 470 K. These two structural modulations can be well explained in terms of condensations of two-coupled phonon modes with wave vectors of q1=0.62a＊ on the a＊-b＊ plane and q2 = 0.23a＊ on the a＊-c＊ plane. The atomic displacements occur along the b-axis direction for q1 and along the c-axis direction for q2, respectively. Moreover, the correlation between ql and q2 can be generally written as q1 = （q2 ＋ a＊）/2 in the CDW state, suggesting the presence of essential coupling between q1 and q2. A small fraction of Ir doping on the Pt site in Sr（Pt1-xIrx）2As2 （x ≤ 0.06） could moderately change these CDW modulations and also affect their superconductivities. 展开更多
关键词 superconductivity charge-density-wave structural modulation transmission electron microscopy
暂未订购 下载PDF
Multicolor upconversion reversible modulations in YNbO4:Er3+/Tm3+/Yb3+ photochromic materials 认领 引用 被引量：1
8
作者 Zhen Zhang Peng Li +4 位作者 Ziyi Xu Zhihao Zhang Qiwei Zhang Haiqin Sun Xihong Hao 《Journal of Rare Earths》 SCIE EI CAS CSCD 2024年第2期270-277,I0002,共8页
Photochromic materials with multicolor upconversion reversible modulations are attractive in optical switching devices.Herein,the fabricated YNbO4:Er3+/Tm3+/Yb3+ materials exhibit excellent photochromism a... Photochromic materials with multicolor upconversion reversible modulations are attractive in optical switching devices.Herein,the fabricated YNbO4:Er3+/Tm3+/Yb3+ materials exhibit excellent photochromism and multicolor upconversion properties from green,red to near infrared(NIR) emissions with increasing Yb concentrations.Reversible multiband upconversion modulations are achieved by alternating light(365 and 405 nm) or thermal stimuli.After 365 nm irradiation,the luminescence color changes from yellow to red,the luminescent photoswitching contrast reaches up to 86.21%(green),82.12%(red) and 77.38%(NIR) in the Y0.83Er0.01Tm0.01NbO4:0.15 Yb sample.Besides,the upconversion emission intensity before and after photochromic reaction shows remarkable change in a wide temperature range of 298-718 K.These results indicate that the Er3+/Tm3+/Yb3+ tri-doped YNbO4 materials can be a good candidate in optical switching and data storage applications. 展开更多
关键词 Photochromic materials Luminescence modulation Multicolor emission Photoswitching contrast Rare earths
暂未订购 下载PDF
Classification using wavelet packet decomposition and support vector machine for digital modulations 认领 引用 被引量：4
9
作者 Zhao Fucai Hu Yihua Hao Shiqi 《Journal of Systems Engineering and Electronics》 SCIE EI 2008年第5期914-918,共5页
To make the modulation classification system more suitable for signals in a wide range of signal to noise rate(SNR),a feature extraction method based on signal wavelet packet transform modulus maxima matrix(WPTMMM)and... To make the modulation classification system more suitable for signals in a wide range of signal to noise rate(SNR),a feature extraction method based on signal wavelet packet transform modulus maxima matrix(WPTMMM)and a novel support vector machine fuzzy network(SVMFN)classifier is presented.The WPTMMM feature extraction method has less computational complexity,more stability,and has the preferable advantage of robust with the time parallel moving and white noise.Further,the SVMFN uses a new definition of fuzzy density that incorporates accuracy and uncertainty of the classifiers to improve recognition reliability to classify nine digital modulation types(i.e.2ASK,2FSK,2PSK,4ASK,4FSK,4PSK,16QAM,MSK,and OQPSK).Computer simulation shows that the proposed scheme has the advantages of high accuracy and reliability(success rates are over 98%when SNR is not lower than 0dB),and it adapts to engineering applications. 展开更多
关键词 modulation classification wavelet packet transform modulus maxima matrix support vector machine,fuzzy density.
暂未订购 下载PDF
Design of electron wave filters in monolayer graphene with velocity modulations 认领 引用 被引量：3
10
作者 孙立风 董利民 房超 《Chinese Physics B》 SCIE EI CAS CSCD 2013年第4期410-414,共5页
We compare the transport properties of electrons in monolayer graphene by modulating the Fermi velocity inside the barrier. A critical transmission angle is found only when the Fermi velocity in the barriers is larger... We compare the transport properties of electrons in monolayer graphene by modulating the Fermi velocity inside the barrier. A critical transmission angle is found only when the Fermi velocity in the barriers is larger than the one outside the barriers. It is shown that the transmission exhibits periodicity with the incident angle below the critical transmission angle, and attenuates exponentially in the opposite situation. For both situations, peak splitting occurs in the transmission as the number of the velocity barriers increases, and the characteristics of the transmission suggest an interesting application of an excellent band-pass filter. The dependence of the conductance on the Fermi energy through an identical velocity- modulation structure differs wildly with different Fermi velocities of the barrier. The counterpart of the peak splitting is the sharp oscillations in the conductance profile. Furthermore, some oscillations for the multiple barriers are so sharp that the structure may be used as an excellent sensor. 展开更多
关键词 velocity modulation periodicity peak splitting sharp oscillations
暂未订购 下载PDF
Different Charging-Induced Modulations of Highest Occupied Molecular Orbital Energies in Fullerenes in Comparison with Carbon Nanotubes and Graphene Sheets 认领 引用
11
作者 杨宏平 包海洪 +3 位作者 韩丽丽 原文娟 罗俊 朱静 《Chinese Physics Letters》 SCIE EI CAS CSCD 2018年第12期45-48,共4页
The highest occupied molecular orbital（HOMO） energies of fullerenes are found by quantitative first-principles calculations to be raised by negative charging, and the rising rate rank of the fullerenes is C60 >C7... The highest occupied molecular orbital（HOMO） energies of fullerenes are found by quantitative first-principles calculations to be raised by negative charging, and the rising rate rank of the fullerenes is C60 >C70 >C80 >C90>C100 >C180. Then we compare fullerenes with carbon nanotubes（CNTs） and graphene sheets（GSs） and find that the increase of the HOMO energy of a fullerene is much faster than that of CNTs and graphene sheets with the same number of C atoms. The rising rate rank is fullerene>CNT>GS, which holds no matter what the number of C atoms is or which structure the fullerene isomer is. This work paves a new path for developing all-carbon devices with low-dimensional carbon nanomaterials as different functional elements. 展开更多
关键词 Different Charging-Induced Modulations of Highest Occupied Molecular Orbital Energies in Fullerenes in Comparison with Carbon Nanotubes and Graphene Sheets GS
暂未订购 下载PDF
A novel adaptive classification scheme for digital modulations in satellite communication 认领 引用 被引量：1
12
作者 吴丹 Gu Xuemai Guo Qing 《High Technology Letters》 EI CAS 2007年第2期145-149,共5页
To make the modulation classification system more suitable for signals in a wide range of signal to noise ratios （SNRs）, a novel adaptive modulation classification scheme is presented in this paper. Differ-ent from ... To make the modulation classification system more suitable for signals in a wide range of signal to noise ratios （SNRs）, a novel adaptive modulation classification scheme is presented in this paper. Differ-ent from traditional schemes, the proposed scheme employs a new SNR estimation algorithm for small samples before modulation classification, which makes the modulation classifier work adaptively according to estimated SNRs. Furthermore, it uses three efficient features and support vector machines （SVM） in modulation classification. Computer simulation shows that the scheme can adaptively classify ten digital modulation types （i.e. 2ASK, 4ASK, 2FSK, 4FSK, 2PSK, 4PSK, 16QAM, TFM, π/4QPSK and OQPSK） at SNRS ranging from 0dB to 25dB and success rates are over 95% when SNR is not lower than 3dB. Accuracy, efficiency and simplicity of the proposed scheme are obviously improved, which make it more adaptive to engineering applications. 展开更多
关键词 adaptive modulation classification support vector machine SNR estimation digital modulation
暂未订购 下载PDF
Multi-channel meta-holograms enabled by diffraction-order-decoupled Pancharatnam-Berry-phase and detour-phase modulations 认领 引用
13
作者 SHA HU NANNAN HU +5 位作者 WEIKANG FANG CHAO WANG KAITING ZHU SUBINUER ROUZI YANG GUO CHANGZHI GU 《Photonics Research》 SCIE EI CAS CSCD 2026年第6期2564-2572,共9页
Multifunctional metasurfaces have attracted significant attention for their ability to integrate diverse functionalities into a single device,thereby greatly enhancing the information density and system integration.Ho... Multifunctional metasurfaces have attracted significant attention for their ability to integrate diverse functionalities into a single device,thereby greatly enhancing the information density and system integration.However,challenges remain for simultaneously achieving multifunctional integration and simplifying the metasurface design.Here,we demonstrate a geometrically uniform plasmonic metasurface that enables diffraction-orderdecoupled multiplexed holograms,where each diffraction order serves as an independent information channel.By leveraging extraordinary optical diffraction,the proposed metasurface selectively funnels incident light into isolated 0th and-1st diffraction orders.Through optimization of the geometric parameters of the meta-atoms,detour-phase modulation is exclusively activated in the-1st order,whereas Pancharatnam-Berry(PB)phase is carried by the 0th order,thereby achieving complete channel decoupling.Based on the independent and simultaneous modulation of meta-atom displacements and rotations,customized phase profiles are assigned to distinct diffraction orders.As a proof of concept,we experimentally demonstrate diffraction-order-decoupled dual-channel holograms based on the integration of one-dimensional detour phase and PB-phase modulations.Furthermore,by extending this paradigm through the integration of a dual-dimensional detour phase,a tri-functional metasurface is realized.This simple multifunctional metasurface holds substantial promise for applications in displays,data storage,and integrated multifunctional systems. 展开更多
关键词 geometrically uniform plasmonic metasurface multifunctional integration multifunctional metasurfaces information density pancharatnam berry phase multi channel meta holograms integrate diverse functionalities detour phase modulations
暂未订购 下载PDF
Interference-induced suppression of particle emission from a Bose-Einstein condensate in lattice with time-periodic modulations 认领 引用
14
作者 Long-Quan Lai Zhao Li 《Chinese Physics B》 SCIE EI CAS CSCD 2024年第10期153-158,共6页
Emission of matter-wave jets from a parametrically driven condensate has attracted significant experimental and theoretical attention due to the appealing visual effects and potential metrological applications.In this... Emission of matter-wave jets from a parametrically driven condensate has attracted significant experimental and theoretical attention due to the appealing visual effects and potential metrological applications.In this work,we investigate the collective particle emission from a Bose-Einstein condensate confined in a one-dimensional lattice with periodically modulated interparticle interactions.We give the regimes for discrete modes,and find that the emission can be distinctly suppressed.The configuration induces a broad band,but few particles are ejected due to the interference of the matter waves.We further qualitatively model the emission process and demonstrate the short-time behaviors.This engineering provides a way to manipulate the propagation of particles and the corresponding dynamics of condensates in lattices,and may find application in the dynamical excitation control of other nonequilibrium problems with time-periodic driving. 展开更多
关键词 Bose-Einstein condensate matter-wave jet periodic modulation
暂未订购 下载PDF
MAKING FULL USE OF OUTDATED CHANNEL ESTIMATES FOR BLOCK BY BLOCK ADAPTIVE MODULATIONS 认领 引用
15
作者 Shan Xiaohong Bi Guangguo 《Journal of Electronics(China)》 2007年第1期54-59,共6页
This paper explores the potential to use accurate but outdated channel estimates for adaptive modulation. The work is novel in that the research is conditioned on block by block adaptation. First,we define a new quant... This paper explores the potential to use accurate but outdated channel estimates for adaptive modulation. The work is novel in that the research is conditioned on block by block adaptation. First,we define a new quantity,the Tolerable Average Use Delay (TAUD),which can indicate the ability of an adaptation scheme to tolerate the delay of channel estimation results. We find that for the variable-power schemes,TAUD is a constant and dependent on the target Bit Error Rate (BER),average power and Doppler frequency; while for the constant-power schemes,it depends on the ad-aptation block length as well. At last,we investigate the relation between the delay tolerating per-formance and the spectral efficiency and give the system design criterion. The delay tolerating per-formance is improved at the price of lower data rate. 展开更多
关键词 Adaptive modulation Block by block adaptation Channel estimation Spectral efficiency
暂未订购 下载PDF
Advanced metasurfaces:precise modulations of light in space and time domains 认领 引用 被引量：1
16
作者 Chenxi Zhang Linyu Cong +8 位作者 Jinhong Zhang Hongbei Meng Sirui Peng Shijin Li He Zhang Yikun Wang Bo Fu Jiyong Wang Min Qiu 《Advanced Photonics》 SCIE EI CAS CSCD 2026年第1期58-90,共33页
Metasurfaces,artificial two-dimensional layered materials with a sub-wavelength thickness,have gained significant interest due to their unparalleled ability to precisely manipulate the amplitude,polarization,phase,and... Metasurfaces,artificial two-dimensional layered materials with a sub-wavelength thickness,have gained significant interest due to their unparalleled ability to precisely manipulate the amplitude,polarization,phase,and other intrinsic properties of electromagnetic waves.In addition,the development of metasurfaces provides a new idea of“structure instead of material,”through the local enhancement of the optical field and resonance modulation,which can break through the limitations of the material's intrinsic nonlinear effects,to realize the significant improvement of performance parameters in the sub-ps time domain.This review discusses the design principles,fabrication,and numerical simulation methods of metasurfaces,as well as their modulation characteristics of light in space and time domains.In the applications,the contribution of metasurfaces to optical modulation and imaging in the space domain is summarized,with a focus on their phase and polarization manipulation capabilities.Particularly,we are attentive to the application of metasurfaces in the time domain,probing into the relationship between metasurface structure and nonlinear optical properties,as well as the generation of pulsed lasers via mode-locked and Q-switched techniques.Finally,the developments and challenges of metasurfaces are summarized with an outlook provided to give a comprehensive understanding of metasurfaces and to facilitate their practical applications. 展开更多
关键词 metasurfaces optical modulation optical imaging ultrafast optics
Intrinsically stretchable organic electrochemical synaptic transistors for versatile response modulations 认领 引用
17
作者 Hyunseok Shim Heena Kim +4 位作者 Seonmin Jang Nam-In Kim Taeheon Kim Donghyeon Seo Hae-Jin Kim 《Nano Research》 SCIE EI CSCD 2025年第9期1212-1223,共12页
The development of intrinsically stretchable organic electrochemical synaptic transistors(ISOESTs)based entirely on elastomeric materials is pivotal for advancing applications requiring neuromorphic functionality unde... The development of intrinsically stretchable organic electrochemical synaptic transistors(ISOESTs)based entirely on elastomeric materials is pivotal for advancing applications requiring neuromorphic functionality under significant mechanical deformation.This study presents ISOESTs capable of replicating a comprehensive range of synaptic behaviors,including excitatory postsynaptic currents(EPSCs),paired-pulse facilitation(PPF),and transitions from short-term memory(STM)to long-term memory(LTM).Remarkably,these synaptic characteristics were preserved even when the devices were subjected to 30%uniaxial strain,demonstrating exceptional mechanical robustness and functional stability.A pixelated 5×5 array of ISOESTs exhibited minimal device-to-device variation,underscoring the scalability and uniformity of the fabrication approach.To further illustrate their potential,a neurologically integrated electronic skin(e-skin)was fabricated,incorporating these ISOESTs to enable modulation of synaptic responses.The modulation of synaptic responses was strongly correlated with electrochemical analyses,establishing a robust operational framework for programmable neuromorphic systems.Comprehensive investigations into device fabrication,operation mechanisms,and integration strategies provide critical insights into the potential of these systems for next-generation applications in wearable electronics,soft robotics,neuro-prosthetics,and human–machine interfaces.This work represents a significant step toward realizing adaptive,biologically inspired electronic platforms capable of bridging the gap between engineered systems and living tissues. 展开更多
关键词 intrinsically stretchable organic electrochemical synaptic transistors synaptic decay electronic skin(e-skin) synaptic response modulation system
暂未订购 下载PDF
Modulation of mitochondrial dysfunction:Mechanisms and strategies for the use of natural products to treat stroke 认领 引用 被引量：3
18
作者 Na Qin Rujuan Liu +3 位作者 Rong Deng Liuliu Shi Lei Wang Ting Zhu 《Neural Regeneration Research》 SCIE CAS CSCD 2026年第6期2215-2226,共12页
Modulations of mitochondrial dysfunction,which involve a series of dynamic processes such as mitochondrial biogenesis,mitochondrial fusion and fission,mitochondrial transport,mitochondrial autophagy,mitochondrial apop... Modulations of mitochondrial dysfunction,which involve a series of dynamic processes such as mitochondrial biogenesis,mitochondrial fusion and fission,mitochondrial transport,mitochondrial autophagy,mitochondrial apoptosis,and oxidative stress,play an important role in the onset and progression of stroke.With a better understanding of the critical role of mitochondrial dysfunction modulations in post-stroke neurological injury,these modulations have emerged as a potential target for stroke prevention and treatment.Additionally,since effective treatments for stroke are extremely limited and natural products currently offer some outstanding advantages,we focused on the findings and mechanisms of action related to the use of natural products for targeting mitochondrial dysfunction in the treatment of stroke.Natural products achieve neuroprotective through multi-target regulation of mitochondrial dysfunction encompassing the following processes:(1)Mitochondrial biogenesis:Cordyceps and hydroxysafflor yellow A activate the peroxisome proliferator-activated receptor gamma coactivator 1-alphauclear respiratory factor pathway,promote mitochondrial DNA replication and respiratory chain protein synthesis,and thereby restore energy supply in the ischemic penumbra.(2)Mitochondrial dynamics balance:Ginsenoside Rb3 promotes Opa1-mediated neural stem cell migration and diffusion for recovery of damaged brain tissue.(3)Mitochondrial autophagy:Gypenoside XVII selectively eliminates damaged mitochondria via the phosphatase and tensin homolog-induced kinase 1/Parkin pathway and blocks reactive oxygen species and the NOD-like receptor protein 3 inflammasome cascade,thereby alleviating blood-brain barrier damage.(4)Anti-apoptotic mechanisms:Ginkgolide K inhibits Bax mitochondrial translocation and downregulates caspase-3/9 activity,reducing neuronal programmed death induced by ischemia-reperfusion.(5)Oxidative stress regulation:Scutellarin exerts antioxidant properties and improves neurological function by modulating the extracellular signal-regulated kinase 5-Kruppel-like factor 2-endothelial nitric oxide synthase signaling pathway.(6)Intercellular mitochondrial transport:Neuroprotective effects of Chrysophanol are associated with accelerated mitochondrial transfer from astrocytes to neurons.Existing studies have confirmed that natural products exhibit neuroprotective effects through multidimensional interventions targeting mitochondrial dysfunction in both ischemic and hemorrhagic stroke models.However,their clinical translation still faces challenges,such as the difficulty in standardization due to component complexity,insufficient cross-regional clinical data,and the lack of long-term safety evaluations.Future research should aim to integrate new technologies,such as single-cell sequencing and organoid models,to deeply explore the mitochondria-targeting mechanisms of natural products and validate their efficacy through multicenter clinical trials,providing theoretical support and translational pathways for the development of novel anti-stroke drugs. 展开更多
关键词 apoptosis autophagy hemorrhagic stroke ischemic stroke mitochondrial biogenesis mitochondrial dynamics mitochondrial dysfunction modulations mitochondrial transport natural products oxidative stress
暂未订购 下载PDF
Laser-optical-field-modulation fabricating large-aperture dual-band antireflection windows for MWIR and LWIR imaging 认领 引用 被引量：2
19
作者 Yulong Ding Cong Wang +8 位作者 Xianshi Jia Linpeng Liu Zheng Gao Xiang Jiang Shiyu Wang Dejin Yan Nai Lin Zhou Li Ji’an Duan 《International Journal of Extreme Manufacturing》 SCIE EI CAS CSCD 2026年第2期560-574,共15页
Dual-band antireflection(DBAR)windows based on surface microstructures offer a promising solution for mid-wave infrared(MWIR)and long-wave infrared(LWIR)co-aperture composite imaging.However,micro-nano manufacturing t... Dual-band antireflection(DBAR)windows based on surface microstructures offer a promising solution for mid-wave infrared(MWIR)and long-wave infrared(LWIR)co-aperture composite imaging.However,micro-nano manufacturing technology faces significant challenges in efficiently producing highly uniform microstructures with characteristic dimensions of∼1μm across hundreds of millimeters.Here,we report a laser optical field modulation(LOFM)technology for the rapid manufacture of ultra-large-scale arrays of antireflection microholes(ARMHs)on large-aperture and non-perfectly planar windows.LOFM technology,which modulates laser pulses in both temporal and spatial domains,enhances ARMH aspect ratios from 0.1 to 0.8 without reducing manufacturing time,and maintains processing accuracy even with laser focus shifts,thereby addressing inconsistencies in large-area processing.As a proof of concept,approximately 7 billion ARMHs are fabricated on a 100-mm-diameter zinc sulfide(ZnS)window at a rate of 20000 holes per second using LOFM technology assisted by machine learning.The fabricated DBAR ZnS window exhibits ultra-broadband(3.5−14μm),high transmittance(91.1%),wide-angle transmission,wear-resistant,and self-cleaning,making it suitable for environments with multiple interference factors.Dual-band imaging applications demonstrate the significant advantages of DBAR windows in target recognition,multi-scenario robustness,and information acquisition. 展开更多
关键词 laser optical field modulation large-aperture window non-perfectly planar antireflection microstructure dual-band infrared imaging
暂未订购 下载PDF
Role of mitophagy in spinal cord ischemia-reperfusion injury 认领 引用 被引量：2
20
作者 Yanni Duan Fengguang Yang +7 位作者 Yibao Zhang Mingtao Zhang Yujun Shi Yun Lang Hongli Sun Xin Wang Hongyun Jin Xuewen Kang 《Neural Regeneration Research》 SCIE CAS CSCD 2026年第2期598-611,共14页
Spinal cord ischemia-reperfusion injury,a severe form of spinal cord damage,can lead to sensory and motor dysfunction.This injury often occurs after traumatic events,spinal cord surgeries,or thoracoabdominal aortic su... Spinal cord ischemia-reperfusion injury,a severe form of spinal cord damage,can lead to sensory and motor dysfunction.This injury often occurs after traumatic events,spinal cord surgeries,or thoracoabdominal aortic surgeries.The unpredictable nature of this condition,combined with limited treatment options,poses a significant burden on patients,their families,and society.Spinal cord ischemia-reperfusion injury leads to reduced neuronal regenerative capacity and complex pathological processes.In contrast,mitophagy is crucial for degrading damaged mitochondria,thereby supporting neuronal metabolism and energy supply.However,while moderate mitophagy can be beneficial in the context of spinal cord ischemia-reperfusion injury,excessive mitophagy may be detrimental.Therefore,this review aims to investigate the potential mechanisms and regulators of mitophagy involved in the pathological processes of spinal cord ischemia-reperfusion injury.The goal is to provide a comprehensive understanding of recent advancements in mitophagy related to spinal cord ischemia-reperfusion injury and clarify its potential clinical applications. 展开更多
关键词 BNIP3 BNIP3L/NIX FUNDC1 mechanism mitochondria mitophagy modulators Parkin PINK1 spinal cord ischemia-reperfusion injury
暂未订购 下载PDF
已选0条
引用分析
参考文献
引证文献
 统计分析
检索结果
已选文献
上一页 1 2 … 250 下一页 到第 页
在线咨询 使用帮助 返回顶部 意见反馈