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Cytological and Molecular Characteristics of Pollen Abortion in Lily with Dysplastic Tapetum

Horticultural Plant Journal 2019年第6期5卷 281-294页

作者： Xueqian Wang Ze Wu Lanqing Wang Meijiao Wu Dehua Zhang Weimin Fang Fadi Chen Nianjun Teng College of Horticulture Nanjing Agricultural University/Key Laboratory of Landscape DesignMinistry of Agriculture and Rural AffairsNanjing 210095China Baguazhou Science and Technology Innovation Center of Modern Horticultural Industry Nanjing 210043China

Lily was grown worldwide as a fresh cutting flower because of its colorful petals, but its anther contained a large number of pollen grains that cause serious pollen contamination, however, pollen abortion can effectively reduce the level of pollen pollution. Our analysis aims to use cytological observation to detect the critical stage when pollen abortion occurs and to provide comprehensive gene expression information at the transcriptional level. The result showed that pollen abortion in ‘Little Kiss’ began at the mononuclear stage and the callose that covers the microspores failed to degenerate when young pollens were released from the tetrads. In addition, compared with the normally developed one,the tapetum of ‘Little Kiss’ degraded in advance while the degradation of callose was delayed. Furthermore, 103 differentially expressed genes(DEGs) related to the advance degeneration of tapetum cells and callose were found in the expression levels, including 22 transcription factors(TFs). In particular, two β-glucanase genes(endo-1,3(4)-β-glucanase, exo-β-glucanase) responsible for callose degeneration were significantly down-regulated. These results suggested that pollen abortion may occur at mononuclear stage and that early degeneration of tapetum cells resulted in a significant down-regulation of β-glucanase genes. As a result, the callose to cover microspores impedes the formation of pollen walls, which may possibly lead to pollen abortion.

关键词： Lilium Asiatic hybrids microspore development tapetum programmed cell death callose transcription factor

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A single TiO_(2)-coated side-glowing optical fiber for photocatalytic wastewater treatment

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Chinese Science Bulletin 2005年第18期50卷 1979-1984页

作者： HU Yan XU Jingjing YUAN Chunwei LIN Jian YIN Zhidong State key laboratory of Bioelectronics Southeast University Nanjing 210096 China Nanjing Fiberglass Research and design Institute Nanjing 210012 China School of Chemical Engineering Nanjing University of Science and Technology Nanjing 210094 China

By means of TiO2-layer-on-SiO2-layer, anatase TiO2 was deposited on novel side- glowing optical fibers, which can provide side UV radiation along the whole fiber length. FE-SEM images show that the double layers adhered well to the side-glowing optical fiber, and the TiO2 coating was homogeneous and smooth. The decomposition reaction of reactive brilliant red dye X-3B on a single TiO2-coated side-glowing optical fiber indicated that the side-scattering UV light intensity was strong enough for photocatalytic oxi-dation reaction. Therefore, TiO2-coated side-glowing optical fibers open up a new way to use the optical fiber reactor in photocatalytic wastewater treatment.

关键词：二氧化钛二氧化硅光学光纤废水处理分解反应

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Ion conduction path in composite solid electrolytes for lithium metal batteries: from polymer rich to ceramic rich

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Frontiers in Energy 2022年第5期16卷 706-733页

作者： Zhouyu ZHANG Hao CHEN Zhenglin HU Shoubin ZHOU Lan ZHANG Jiayan LUO key laboratory for Green Chemical Technology of the Ministry of Education School of Chemical Engineering and TechnologyTianjin UniversityTianjin 300072China Shanghai key laboratory of Advanced High-Temperature Materials and Precision Forming School of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai 200240China Huafu High Technology Energy Storage Co. Ltd.Yangzhou 225600China CAS key laboratory of Green Process and Engineering Beijing Key Laboratory of Ionic Liquids Clean ProcessState Key Laboratory of Multiphase Complex SystemsInstitute of Process EngineeringChinese Academy of SciencesBeijing 100190China

Solid-state electrolytes(SSEs)can address the safety issue of organic electrolyte in rechargeable lithium ***,neither polymer nor ceramic SSEs used alone can meet the demand although great progress has been made in the past few *** solid electrolytes(CSEs)composed of flexible polymers and brittle but more conducting ceramics can take advantage of the individual system for solid-state lithium metal batteries(SSLMBs).CSEs can be largely divided into two categories by the mass fraction of the components:“polymer rich”(PR)and“ceramic rich”(CR)systems with different internal structures and electrochemical *** review provides a comprehensive and in-depth understanding of recent advances and limitations of both PR and CR electrolytes,with a special focus on the ion conduction path based on polymer-ceramic interaction mechanisms and structural designs of ceramic fillers/*** addition,it highlights the PR and CR which bring the leverage between the electrochemical property and the mechanical ***,it further prospects the possible route for future development of CSEs according to their rational design,which is expected to accelerate the practical application of SSLMBs.

关键词： composite solid electrolytes active filler/framework ion conduction path interphase compatibility multilayer design

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3D Cohesive Finite Element Minimum Invasive Surgery Simulation Based on Kelvin‑Voigt Model

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Chinese Journal of Mechanical Engineering 2022年第3期35卷 161-173页

作者： Yonghang Jiang Qinghua Song Xichun Luo Centre for Precision Manufacturing Department of Design Manufacturing&Engineering ManagementUniversity of StrathclydeGlasgow G11XJUK key laboratory of High Efficiency and Clean Mechanical Manufacture Ministry of EducationSchool of Mechanical EngineeringShandong UniversityJinan 250013China

Minimally invasive surgery is an important technique used for cytopathological ***,multiple studies have been conducted on a three-dimensional(3D)puncture simulation model as it can reveal the internal deformation state of the tissue at the micro *** this study,a viscoelastic constitutive equation suitable for muscle tissue was ***,a method was developed to define the fracture characteristics of muscle tissue material during the simulation *** fracture of the muscle tissue in contact with the puncture needle was simulated using the cohesive zone model and a 3D puncture finite element model was established to analyze the deformation of the muscle *** stress nephogram and reaction force under different parameters were compared and analyzed to study the deformation of the biological soft tissue and guide the actual operation process and reduce pain.

关键词： Minimally invasive surgery Constitutive model 3D simulation Cohesive zone model

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Tailoring the tribological properties of nanostructured carbon films under water lubrication

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摩擦:英文版 2023年第12期11卷 2297-2309页

作者： Lei YANG Shaoshan XIN Jiang GENG Meiling GUO key laboratory of Education Ministry for Modern design&Rotor-Bearing System Xi’an Jiaotong UniversityXi’an 710049China Xi’an Aerospace Propulsion Institute Xi’an 710100China School of Mechanical and Precision Instrument Engineering Xi’an University of TechnologyXi’an 710048China

Carbon films have been considered suitable to be applied in water lubrication since they exhibit excellent friction-reducing and wear resistance,chemical inertness,***,the basic understanding of tribological behaviors of carbon-based films under water lubrication still needs to be *** the present work,carbon films with different nanostructures were prepared by the electron cyclotron resonance(ECR)plasma nano-surface manufacturing system,and micro-textures with different sizes were prepared on the surface of carbon films by plasma *** influence of nanostructure and surface texture on the tribological properties of carbon films was *** results show that different nanostructured carbon films can obtain lower friction coefficients and longer wear life under water lubrication than under dry *** to low surface roughness,high hardness,and compact structure,the tribological properties of amorphous carbon(a-C)films under water lubrication are much better than those of graphene sheet-embedded carbon(GSEC)*** prepared surface texture has a negative effect on the hard a-C film,but it can make the soft GSEC film generate soft wear debris at the initial *** the action of water,the soft wear debris is bonded on the surface of the contacting ball to form a silt-like transfer film,which increases the wear life by nearly three orders of *** results extend the basic understanding of the tribological behavior of carbon film under water lubrication,which is crucial in both fundamental and applied science.

关键词： water lubrication carbon film nanostructure surface texture tribological properties

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Magneto-transport properties of thin flakes of Weyl semiconductor tellurium

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Chinese Physics B 2021年第8期30卷 158-162页

作者： Nan Zhang Bin Cheng Hui Li Lin Li Chang-Gan Zeng International Center for Quantum design of Functional Materials Hefei National Laboratory for Physical Sciences at the Microscaleand Synergetic Innovation Center of Quantum Infoimation&Quantum PhysicsUniversity of Science and Technology of ChinaHefei 230026China CAS key laboratory of Strongly Coupled Quantum Matter Physics Department of PhysicsUniversity of Science and Technology of ChinaHefei 230026China key laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of Education Institutes of Physical Science and Information TechnologyAnhui UniversityHefei 230601China

As an elemental semiconductor,tellurium has recently attracted intense interest due to its non-trivial band topology,and the resulted intriguing topological transport *** this study we report systematic electronic transport studies on tellurium flakes grown via a simple vapor deposition *** sample is self-hole-doped,and exhibits typical weak localization behavior at low *** negative longitudinal magnetoresistance under parallel magnetic field is observed over a wide temperature region,which is considered to share the same origin with that in tellurium bulk crystals,i.e.,the Weyl points near the top of valence ***,with lowering temperature the longitudinal magnetoconductivity experiences a transition from parabolic to linear field dependency,differing distinctly from the bulk *** analysis reveals that such a modulation of Weyl behaviors in this low-dimensional tellurium structure can be attributed to the enhanced inter-valley scattering at low *** results further extend Weyl physics into a low-dimensional semiconductor system,which may find its potential application in designing topological semiconductor devices.

关键词： Weyl physics tellurium flakes negative longitudinal magnetoresistance

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Channel selection against electrode shift enables robust myoelectric control without retraining

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Science China(Technological Sciences) 2021年第8期64卷 1653-1662页

作者： LV Bo HE JiaYuan SHENG XinJun DING Han ZHU XiangYang State key laboratory of Mechanical System and Vibration School of Mechanical EngineeringShanghai Jiao Tong UniversityShanghai200240China Department of Systems design Engineering Faculty of EngineeringUniversity of WaterlooWaterlooN2L 3G1Canada

Myoelectric controlled interfaces driven by muscle activities have achieved good performance in ideal conditions and showed many potential medical-related and industrial ***,in practical applications,the performance could be drastically degraded due to the electrode(sensor)shift,which is inevitable in donning and doffing the *** this study,we presented a novel channel selection method against electrode shift for robust pattern-recognition based myoelectric *** proposed method was evaluated on twenty-four subjects,including twenty-two able-bodied subjects and two amputees,and compared with two traditional channel selection methods,i.e.,uniform selection(UNI)and sequential feature selection(SFS).We demonstrated that the offline error rates of the proposed method were significantly lower than those of the other two methods(P<0.05),and its online performance in shift conditions was comparable to that in ideal *** outcomes benefit the practical applications of robust myoelectric controlled interfaces.

关键词： myoelectric control high-density electrodes channel selection electrode shift surface electromyography

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Stretchable organic electrochemical transistors via threedimensional porous elastic semiconducting films for artificial synaptic applications

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Nano Research 2023年第7期16卷 10206-10214页

作者： Yujie Peng Lin Gao Changjian Liu Jinyi Deng Miao Xie Libing Bai Gang Wang Yuhua Cheng Wei Huang Junsheng Yu State key laboratory of Electronic Thin Films and Integrated Devices School of Optoelectronic Science and EngineeringUniversity of Electronic Science and Technology of ChinaChengdu 610054China School of Automation Engineering University of Electronic Science and Technology of ChinaChengdu 611731China State key laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringShanghai Key Laboratory of Lightweight Structural CompositesKey Laboratory of High Performance fibers&productsMinistry of EducationDonghua UniversityShanghai 201620China

Neuromorphic computing targets realizing biomimetic or intelligence systems capable of processing abundant tasks in parallel analogously to our brain,and organic electrochemical transistors(OECTs)that rely on the mixed ionic-electronic synergistic couple possess significant similarity to biological systems for implementing synaptic ***,the lack of reliable stretchability for synaptic OECTs,where mechanical deformation occurs,leads to consequent degradation of electrical ***,we demonstrate stretchable synaptic OECTs by adopting a three-dimensional poly(3-hexylthiophene)(P3HT)/styrene-ethylene-butylene-styrene(SEBS)blend porous elastic film for neuromorphic *** architecture shows the full capability to emulate biological synaptic *** the accumulated layer numbers of porous film enables tunable OECT output and hysteresis,resulting in transition in ***,with a trilayer porous film,large-scale conductance and hysteresis are endorsed for efficient mimicking of memory-dependent synapse *** from the interconnected three-dimensional porous structures,corresponding stretchable synaptic OECTs exhibit excellent mechanical robustness when stretched at a 30%strain,and maintain reliable electrical characteristics after 500 stretching ***,near-ideal weight updates with near-zero nonlinearities,symmetricity in long-term potentiation(LTP)and depression,and applications for image simulation are *** work paves a universal design strategy toward highperformance stretchable neuromorphic computing architecture and could be extended to other flexible/stretchable electronics.

关键词： organic electrochemical transistors(OECTs) artificial synapses porous films flexible electronics neuromorphic computing

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Intelligent prediction on air intake flow of spark ignition engine by a chaos radial basis function neural network

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Journal of Central South University 2020年第9期27卷 2687-2695页

作者： LI Yue-lin LIU Bo-fu WU Gang LIU Zhi-qiang DING Jing-feng ABUBAKAR Shitu key laboratory of Safety and design and Reliability Technology of Engineering Vehicles in Hunan Province Changsha 410114China College of Automotive and Mechanical Engineering Changsha University of Science and TechnologyChangsha 410114China College of Mechanical and Electrical Engineering Central South UniversityChangsha 410083China

To ensure the control of the precision of air-fuel ratio(AFR)of port fuel injection(PFI)spark ignition(SI)engines,a chaos radial basis function(RBF)neural network is used to predict the air intake flow of the *** data of air intake flow is proved to be multidimensionally nonlinear and *** RBF neural network is used to train the reconstructed phase space of the *** chaos algorithm is employed to optimize the weights of output layer connection and the radial basis center of Gaussian function in hidden *** simulation results obtained from Matlab/Simulink illustrate that the model has higher accuracy compared to the conventional RBF *** mean absolute error and the mean relative error of the chaos RBF model can reach 0.0017 and 0.48,respectively.

关键词： intake air flow spark ignition engine chaos RBF neural network

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A double-layered nonlinear model predictive control based control algorithm for local trajectory planning for automated trucks under uncertain road adhesion coefficient conditions

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Frontiers of Information Technology & Electronic Engineering 2020年第7期21卷 1059-1073页

作者： Hong-chao WANG Wei-wei ZHANG Xun-cheng WU Hao-tian CAO Qiao-ming GAO Su-yun LUO College of Mechanical and Automotive Engineering Shanghai University of Engineering ScienceShanghai 201620China State key laboratory of Advanced design and Manufacturing for Vehicle Body Hunan UniversityChangsha 410082China College of Automobile and Transportation Guangxi University of Science and TechnologyLiuzhou 545006China

We present a double-layered control algorithm to plan the local trajectory for automated trucks equipped with four hub motors. The main layer of the proposed control algorithm consists of a main layer nonlinear model predictive control(MLN-MPC) controller and a secondary layer nonlinear MPC(SLN-MPC) controller. The MLN-MPC controller is applied to plan a dynamically feasible trajectory, and the SLN-MPC controller is designed to limit the longitudinal slip of wheels within a stable zone to avoid the tire excessively slipping during traction. Overall, this is a closed-loop control system. Under the off-line co-simulation environments of AMESim, Simulink, dSPACE, and TruckSim, a dynamically feasible trajectory with collision avoidance operation can be generated using the proposed method, and the longitudinal wheel slip can be constrained within a stable zone so that the driving safety of the truck can be ensured under uncertain road surface conditions. In addition, the stability and robustness of the method are verified by adding a driver model to evaluate the application in the real world. Furthermore, simulation results show that there is lower computational cost compared with the conventional PID-based control method.

关键词： Automated truck Trajectory planning Nonlinear model predictive control Longitudinal slip

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