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Combined analysis of the transcriptome and metabolome revealed that selenium nanoparticles mediate root development in cucumber (Cucumis sativus L.)

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Plant physiology and biochemistry : PPB 2025年 226卷 110064页

作者： Yi Zhang Qi Sun Qian Zhang Wenhao Tang Xiangbai Chen Hubei Key Laboratory of Optical Information and Pattern Recognition Wuhan Institute of Technology Donghu New & High Technology Development Zone Wuhan 430205 China. Molecular Marker (Wuhan) Biological Breeding Co. Ltd Wuhan 430200 China. Hubei Vocational College of Bio-Technology Wuhan 430200 China. Hubei Key Laboratory of Optical Information and Pattern Recognition Wuhan Institute of Technology Donghu New & High Technology Development Zone Wuhan 430205 China. Electronic address: xchen@***.

Selenium nanoparticles (SeNPs) have been introduced as stable nanoforms of Se for use as stress modulators and fertilizers in agricultural crops. Cucumber (Cucumis sativus L.), a popular vegetable, is widely grown worldwide. Herein, the effects of different concentrations of SeNPs (0.00 mg/L, 0.02 mg/L and 0.05 mg/L) on the growth of cucumber roots were systematically evaluated via transcriptomics, metabolomics and physiological and biochemical measurement. Treatment with 0.02 mg/L and 0.05 mg/L SeNPs resulted in a reduction of taproot length by 21.49 % and 16.98 %, respectively, compared to the control group, while significantly enhancing the growth of lateral roots. The activities of CAT and APX in roots treated with 0.05 mg/L SeNPs were significantly enhanced compared to the control group. Integrated analyses of transcriptome and metabolome revealed significant changes in gene expression levels and metabolite profiles linked to plant hormone signal pathways. This includes IAA, GH3, SAUR, CRE1, AHP, A-ARR, PP2C, ERF1/2, BAK1, TCH4, TGA, and PR-1. The levels of abscisic acid, jasmonic acid, and salicylic acid were also altered after SeNPs treatment. Moreover, many key genes and metabolites associated with linoleic acid metabolism, carbon fixation in photosynthetic organisms, and glycine, serine, and threonine metabolism were up-regulated. This includes LOX1_5, LOX2S, ALDO, L-cysteine, and glyceric acid. This study provides an important theoretical basis for understanding the mechanisms that underlie the effects of SeNPs in regulating cucumber root development.

关键词： Cucumber Cucumis sativus L. Metabolome Root development Selenium nanoparticles Transcriptome

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Effects of quantum interferences among crystal-momentum-resolved electrons in solid high-order harmonic generation

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Physical Review A 2021年第3期103卷 033104-033104页

作者： Xi Liu Yujie Li Dongdong Liu Xiaosong Zhu Xiaofan Zhang Peixiang Lu School of Physics and New Energy Xuzhou University of Technology Xuzhou 221018 China State Key Laboratory of Millimeter Waves Southeast University Nanjing 210096 China School of Physics and Wuhan National Laboratory for Optoelectronics Huazhong University of Science and Technology Wuhan 430074 China Hubei Key Laboratory of Optical Information and Pattern Recognition Wuhan Institute of Technology Wuhan 430205 China

We theoretically demonstrate the effects of quantum interferences among valence electrons with various initial crystal momenta in the high-order harmonic generation (HHG) in solids. By investigating crystal-momentum-dependent harmonics from solids in linearly polarized laser fields, some unique radiation characteristics of the observed overall harmonics are attributed to the consequences of interferences among valence electrons with different crystal momenta. It is shown that the electron pairs with opposite crystal momenta result in the destructive interferences of even-order harmonics for a crystal with the inversion symmetry, which eventually leads to the only odd orders in observed overall harmonic spectra for a semiconductor material because of the complete pairing of all valence electrons. Additionally, each of the harmonic plateaus in the overall multiple-plateau harmonic spectrum is identified to be contributed by the valence electrons within different crystal momentum zones. We also find that the solid-phase HHG in the below-band-gap region is substantially suppressed due to the collective responses of multiple valence electrons. This work sheds light on the essential impacts of interferences among crystal-momentum-resolved electrons on the HHG in solids and is helpful to explore ultrafast coherent processes in condensed matter.

关键词： Atomic & molecular processes in external fields High-order harmonic generation Light-matter interaction Ultrafast optics 1-dimensional systems Crystalline systems Semiconductors Band structure methods Bloch-Floquet theorem Dipole approximation Schroedinger equation

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Non-uniform Strong Noise Removal Method of Non-cooperative Mine Target Image

Non-uniform Strong Noise Removal Method of Non-cooperative M...

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International Conference on information Science and Control Engineering (ICISCE)

作者： Shikang Wu Yu Shi Jinmeng Wu Hubei Key Laboratory of Optical Information and Pattern Recognition School of Electrical and Information Engineering Wuhan Institute of Technology Wuhan China

The detection of mine targets will be interfered by the underwater non-uniform strong noise (organic matter, suspended particles, etc). To solve this problem, the paper proposes a novel denoising method. Firstly, a new optimization filtering algorithm LEP-EPC is proposed based on the local edge-preserving (LEP) filtering algorithm. A spatially adaptive edge perception constraint regularization term is introduced into the model to better represent the edges and details of the image, so that the edge-preserving and smoothing property of the algorithm is better. Secondly, the paper uses multi-scale strategy to solve the non-uniformity of strong noise, iteratively applies the LEP-EPC algorithm to the noise removal results of each scale to generate multi-scale decomposition, and gradually increases the denoising scale in the process of multi-scale decomposition. The strong noise of different scales is gradually separated from the mine targets image. The experimental results show that the proposed algorithm can remove the underwater non-uniform strong noise while retaining the mine target information, which also has a certain guiding significance for mine operation.

关键词： Adaptation models information science Smoothing methods Control engineering Image edge detection Noise reduction Object detection

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Photonic non-Bloch quadrupole topological insulators in coupled ring resonators

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Physical Review A 2021年第6期103卷 063507-063507页

作者： Zekun Lin Lu Ding Shuyue Chen Shan Li Shaolin Ke Xun Li Bing Wang Hubei Key Laboratory of Optical Information and Pattern Recognition Wuhan Institute of Technology Wuhan 430205 China Wuhan National Laboratory for Optoelectronics School of Physics Huazhong University of Science and Technology Wuhan 430074 China Department of Electrical and Computer Engineering McMaster University Hamilton Ontario L8S 4K2 Canada

We investigate the second-order topological phases in a two-dimensional ring resonator array with each plaquette occupied by π gauge flux and imaginary gauge field. The real and imaginary gauge fields are induced by shifting the displacement and integrating gain or loss into the two half perimeters of the auxiliary rings. The system supports topological corner modes with their emergence being determined by the non-Bloch topological invariant due to skin effects. The bulk modes, exhibiting second-order skin effects in both trivial and nontrivial phases, are accumulated at opposite corners depending on whether clockwise or counterclockwise modes are excited. By introducing an interface with different imaginary gauge fields, we show the bulk modes exist at the interface while the topological corner modes are localized at the physical corners. Furthermore, the skin effects are also presented in the passive ring resonators. The study may find applications in lasers and broadband light trapping.

关键词： Topological effects in photonic systems

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Determination of the photoemission position in single-photon ionization with attosecond streaking spectroscopy

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Physical Review A 2021年第1期103卷 013115-013115页

作者： Feng Wang Qing Liao Kai Liu Meiyan Qin Xiaofan Zhang Qingbin Zhang Wei Cao Liang-Wen Pi Yueming Zhou Peixiang Lu Hubei Key Laboratory of Optical Information and Pattern Recognition Wuhan Institute of Technology Wuhan 430205 China Wuhan National Laboratory for Optoelectronics and School of Physics Huazhong University of Science and Technology Wuhan 430074 China State Key Laboratory of Transient Optics and Photonics Xi'an Institute of Optics and Precision Mechanics of CAS Xi'an 710119 China Guangdong Intelligent Robotics Institute Dongguan 523808 China

Attosecond metrology can directly measure attosecond emission time of photoexcited electrons from matter, providing unprecedented understanding of transition processes of electrons from bound to continuum states. However, some fundamental details of the electron dynamics in the entire emission process upon photoexcitation still remain debatable or unknown. The photoemission time delays deduced from attosecond streaking spectroscopy originate from photoelectron propagation in the coupled Coulomb-laser fields, encoding the spatial and spectral information of electrons upon photoexcitation. Here we demonstrate that attosecond photoemission delays can be used to image picometer-resolved photoemission position via a classical model. The electronic dynamics in the laser-assisted single-photon ionization process is fully captured by a quantum path-integral model. We trace the imaged photoemission position to the average position of spatially coherent superposition of electron waves upon photoexcitation and, in particular, predict emission position coinciding with the orbital radius of the ground state of hydrogen-like atoms, in contrast with previous predictions.

关键词： Single- and few-photon ionization & excitation

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State Feedback Decoupling Control of Web Tension,Velocity and Lateral Displacement in Unwinding System

State Feedback Decoupling Control of Web Tension,Velocity an...

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第32届中国控制与决策会议

作者： Tao Xiong Gan Zhou Dangdang Zou School of Electrical and Information Engineering Wuhan Institute of Technology Hubei Key Laboratory of Optical Information and Pattern Recognition Wuhan Institute of Technology

The coupling and control of the web tension and lateral displacement is the key problem in flexible high-precision roll-to-roll manufacturing *** web tension and lateral displacement are modeling independently with distributed control in current research,which is hard to solve the coupling between the web tension,velocity and lateral displacement for the reason of the model uncertainties,such as time varying radius of the unwinding roll,velocity variations,and so *** solve the above problems,this paper establishes a three inputs and three outputs coupling model of an extended unwinding system with three axes.A state feedback decoupling control method with pole placement is presented to decouple of the web tension,velocity,and lateral *** transient response of the decoupled system is achieved with pole placement method based on integral of time multiplied by absolute error(ITAE) optimal *** approach achieves dynamic decoupling of the web tension,velocity and lateral displacement of the unwinding *** simulation results show well performance of the decoupled system.

关键词： State Feedback Decoupling Control Web Tension Lateral Displacement Unwinding System Pole Placement

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Equivalent Fuzzy Sliding Mode Control of the Web Tension in Unwinding System

Equivalent Fuzzy Sliding Mode Control of the Web Tension in ...

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第32届中国控制与决策会议

作者： Tao Xiong Dangdang Zou Gan Zhou School of Electrical and Information Engineering Wuhan Institute of Technology Hubei Key Laboratory of Optical Information and Pattern Recognition Wuhan Institute of Technology

The unwinding system is the front part of the roll-to-roll manufacturing process, in which the control accuracy of the web tension has a huge effect on the manufacturing accuracy and product quality. Sliding mode control（SMC） method is widely used in web tension control to solve the disturbance caused by the radius variation of the unwinding roller. However, it is difficult to avoid the system chattering problem by using the general equivalent Sliding mode control（ESMC）. In this paper, the mathematical model of the web tension in unwinding system is established by analyzing the longitudinal dynamics of the web. Then a new equivalent fuzzy sliding mode control（EFSMC） method is proposed to solve the chattering problems. The simulation experiment is carried out to compare the performance of the web tension control with ESMC and EFSMC method. The simulation results show that the EFSMC method has nice dynamic performance and tracking accuracy of the web tension control. The chattering problem caused by the web velocity variation can be effectively attenuated. The EFSMC method also shows good performance on the disturbance rejection of the web tension.

关键词： Web Tension Control Equivalent Sliding Mode Control Fuzzy System Unwinding System

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Piston Displacement Tracking of Hydraulic Propulsion System in Horizontal Well of Coal-bed Methane Based on Sliding Mode Control

Piston Displacement Tracking of Hydraulic Propulsion System ...

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第32届中国控制与决策会议

作者： Zicheng Li Yangwu Chen Hou-Neng Wang School of Electrical and Information Engineering Wuhan Institute of Technology Hubei Key Laboratory of Optical Information and Pattern Recognition Wuhan Institute of Technology

According to the principle of similar hydraulic driving shield machine and electro-hydraulic servo valve,the AMESim model of the hydraulic driving system of coal-bed methane（CBM） horizontal well is designed and *** introducing the sliding surface and the switching function of sliding mode control,a sliding mode control algorithm is proposed to realize the tracking control of the desired *** this paper,the hybrid simulation combining Simulink controller and AMESim physical model is implemented for the simulation of the control of piston displacement tracking for hydraulic propulsion *** simulation results show that the proposed algorithm has good tracking accuracy.

关键词： CBM horizontal well Hydraulic Propelling System Sliding mode control Displacement tracking control

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Fuzzy Adaptive Time-Delay Feedback Controlling Chaos in Buck Converter

Fuzzy Adaptive Time-Delay Feedback Controlling Chaos in Buck...

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第32届中国控制与决策会议

作者： Zicheng Li Yuan Yuan Hou-Neng Wang School of Electrical and Information Engineering Wuhan Institute of Technology Hubei Key Laboratory of Optical Information and Pattern Recognition Wuhan Institute of Technology

In order to control the chaotic phenomenon of the buck converter,a nonlinear model based on differential equation is established for the buck converter in this *** system phase portrait and bifurcation diagram are analyzed based on the output voltage and input current,then the fuzzy adaptive time-delay feedback control(TDFC) strategy is proposed to control the buck *** strategy is designed for the purpose of calculating the delay time and the range of feedback gain based on quantitative analysis in the frequency domain via the harmonic balance *** adaptively adjusting the parameters of the time delay and feedback gain based on fuzzy adaptive algorithm,the buck converter can work in the period-1 orbit to ensure an ideal output ***,better robustness and smaller voltage ripple for the buck converter are also achieved compared to traditional TDFC control *** simulation results are provided to show the good performance of the proposed strategy.

关键词： Buck converter Chaos Fuzzy adaptive Time-delay feedback control

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Attention in Attention: Modeling Context Correlation for Efficient Video Classification

arXiv

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arXiv 2022年

作者： Hao, Yanbin Wang, Shuo Cao, Pei Gao, Xinjian Xu, Tong Wu, Jinmeng He, Xiangnan The CCCD Key Lab of Ministry of Culture and Tourism School of Data Science School of Information Science and Technology University of Science and Technology of China Anhui 230026 China The Wuhan Research Institute of Posts and Telecommunications Hubei Wuhan430205 China The School of Computer Science and Information Engineering School of Artificial Intelligence Hefei University of Technology Anhui 230009 China The School of Data Science School of Computer Science and Technology University of Science and Technology of China Anhui 230026 China The Hubei Key Laboratory of Optical Information and Pattern Recognition Wuhan Institute of Technology Hubei Wuhan430070 China

Attention mechanisms have significantly boosted the performance of video classification neural networks thanks to the utilization of perspective contexts. However, the current research on video attention generally focuses on adopting a specific aspect of contexts (e.g., channel, spatial/temporal, or global context) to refine the features and neglects their underlying correlation when computing attentions. This leads to incomplete context utilization and hence bears the weakness of limited performance improvement. To tackle the problem, this paper proposes an efficient attention-in-attention (AIA) method for element-wise feature refinement, which investigates the feasibility of inserting the channel context into the spatio-temporal attention learning module, referred to as CinST, and also its reverse variant, referred to as STinC. Specifically, we instantiate the video feature contexts as dynamics aggregated along a specific axis with global average and max pooling operations. The workflow of an AIA module is that the first attention block uses one kind of context information to guide the gating weights calculation of the second attention that targets at the other context. Moreover, all the computational operations in attention units act on the pooled dimension, which results in quite few computational cost increase ( Copyright © 2022, The Authors. All rights reserved.

关键词： Machine learning

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