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Bio-inspired low-tortuosity carbon host for high-performance lithium-metal anode

National Science Review 2019年第2期6卷 247-256页

作者： Yi-Chen Yin Zhi-Long Yu Zhi-Yuan Ma tian-Wen Zhang Yu-Yang lu Tao Ma Fei Zhou hong-Bin Yao Shu-hong Yu Department of Chemistry CAS Center for Excellence in Nanoscience Hefei Science Center of CAS University of Science and Technology of China Hefei National Laboratory for Physical Sciences at the Microscale University of Science and Technology of China CAS Key Laboratory of Mechanical Behavior and Design of Materials Department of Modern MechanicsUniversity of Science and Technology of China

Lithium metal is one of the most promising anode materials for high-energy-density Li batteries. However,low stability caused by dendrite growth and volume change during cycling hinders its practical ***, we report an ingenious design of bio-inspired low-tortuosity carbon with tunable vertical micro-channels to be used as a host to incorporate nanosized Sn/Ni alloy nucleation sites, which can guide Li metal’s plating/stripping and meanwhile accommodate the volume change. The pore sizes of the vertical channels of the carbon host can be regulated to investigate the structure–performance correlation. After compositing Li, the bio-inspired carbon host with the smallest pore size（～14 μm） of vertical channels exhibits the lowest overpotential(～18 mV at 1 mA cm;), most stable tripping/plating voltage profiles,and best cycling stability（up to 500 cycles） in symmetrical cells. Notably, the carbon/Li composite anode is more rewarding than Li foil when coupled with LiFePO;in full cells, exhibiting a much lower polarization effect, better rate capability and higher capacity retention（90.6% after 120 cycles）. This novel bio-inspired design of a low-tortuosity carbon host with nanoalloy coatings may open a new avenue for fabricating advanced Li-metal batteries with high performance.

关键词： bio-inspiration low-tortuosity carbon host lithium metal micro-channels nucleation sites

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Precipitation Behavior and Mechanical Properties of a 16Cr-25Ni Superaustenitic Stainless Steel Weld Metal During Post-weld Heat Treatment

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Acta Metallurgica Sinica(English Letters) 2022年第4期35卷 577-590页

作者： Wenbin tian Dong Wu Yiyi Li Shanping lu Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China CAS Key Laboratory of Nuclear Materials and Safety Assessment Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China

A 16Cr-25Ni superaustenitic stainless steel weld metal for austenitic stainless steel/ferrite heat-resistance steel dissimilar metal weld was designed and prepared through tungsten inert-gas *** precipitate evolution and its correlation with mechanical properties were investigated during post-weld heat treatment(PWHT)at 690℃ for up to 12 *** primary precipitates in the as-welded weld metal were identified as Mo-rich M6C carbides in the interdendritic region and semicontinuous fine-sized M23C6 carbides along grain *** PWHT,three types of precipitates coexisted in the interdendritic region:primary M6C carbides,newly precipitated Mo-rich M2X carbonitrides and some of the secondary M23C6 ***,mass secondary M23C6 carbides formed and coarsened along grain *** undesirable intermetallic phases formed during the whole *** M2X and interdendritic M23C6 improved the strength of the weld metal after PWHT,but the elongation and impact toughness degraded,which were mainly owing to the intergranular M23C6 carbides that changed the fracture mode from ductile transgranular mode to mixed mode of transgranular and intergranular ***,the coarsening of M2X carbonitrides may lead to the elongation loss during 8 h to 12 *** of impact toughness was also related to the M2X carbonitrides,which made the crack easier to propagate compared with austenitic matrix and contributed to the decline of impact ***,due to the sluggish precipitation of M2X carbonitrides with longer holding time,the decreasing trend became slow from 4 to 12 *** results showed that PWHT should be controlled within 8 h to obtain better combination of strength and ductility.

关键词： Superaustenitic stainless steel Weld metal Post-weld heat treatment Precipitate evolution Mechanical properties

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Cauchy matrix structure of the Mel’nikov model of long-short wave interaction

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Communications in Theoretical Physics 2020年第12期72卷 83-93页

作者： hong-Juan tian Da-Jun Zhang Department of Mathematics Shanghai UniversityShanghai 200444China

We propose a systematic method to construct the Mel’nikov model of long–short wave interactions,which is a special case of the Kadomtsev–Petviashvili(KP)equation with self-consistent sources(KPSCS).We show details how the Cauchy matrix approach applies to Mel’nikov’s model which is derived as a complex reduction of the *** a new result wefind that in the dispersion relation of a 1-soliton there is an arbitrary time-dependent function that has previously not reported in the literature about the Mel’nikov *** function brings time variant velocity for the long wave and also governs the short-wave *** variety of interactions of waves resulting from the time-freedom in the dispersion relation is illustrated.

关键词： Mel’nikov model of long–short wave interaction Cauchy matrix approach self-consistent sources KP equation

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Dynamic modeling and analysis of the 3-PRS power head based on the screw theory and rigid multipoint constraints

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Science China(Technological Sciences) 2023年第7期66卷 1869-1882页

作者： MA YiWei tian YanLing LIU XianPing lu ChengHao School of Engineering The University of WarwickCoventryCV47ALUK School of Mechanical Engineering Tianjin UniversityTianjin300072China

This study presents a dynamic modeling and analysis methodology for the 3-PRS parallel ***,an improved reduced dynamic model of component substructures is proposed using the dynamic condensation technique and the rigid multipoint constraints at the joint/interface level,leading to a minimum set of generalized coordinates for external ***,the mapping between interface constraint stiffness and global stiffness is illustrated,resulting in an analytical stiffness model of joint ***,the derived component and joint substructures are synthesized into the entire mechanism based on the Lagrange ***,a case study illustrates that the lower-order dynamic performances predicted within the proposed approach have the same trend as those obtained from a complete-order finite element *** root mean square discrepancy of the lower-order natural frequencies between the two models is less than 5.92%,indicating the accuracy and effectiveness of the proposed *** developed approach can highly and efficiently predict the dynamic performance distributions across the entire workspace and guide the optimal functional design under the virtual machine framework.

关键词： dynamic modeling parallel kinematic machines screw theory substructure synthesis rigid multipoint constraints

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Green Plant Leaf-inspired Smart Camouflage Fabrics for Visible Light and Near-infrared Stealth

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Journal of Bionic Engineering 2022年第3期19卷 788-798页

作者： Qixin lu Min Li Anli tian Shaohai Fu Jiangsu Engineering Research Centre for Digital Textile Inkjet Printing Key Laboratory of Eco-TextileMinistry of EducationJiangnan UniversityWuxi214122China National Manufacturing Innovation Centre of Advanced Dyeing and Finishing Technology Ministry of EducationJiangnan UniversityWuxi214122China

Due to Visible light and Near-Infrared(Vis–NIR)stealth play an important role in the commercial,military,and scientific fields,camouflage materials related to it attracted increasing attention in *** plant leaves,as the most extensive background materials on the earth,were widely simulated in the camouflage ***,difficult full-spectrum simulation(380–2500 nm),low-similarity simulation and the complex preparation have been great challenges for Vis–NIR Camouflage Materials(Vis–NIR-CMs).Herein,basing on the color-matching principle,two novel Vis–NIR-CMs including Dark Green Materials and Light Green Materials(DGM and LGM)were facilely fabricated by simple printing organic disperse dyes including *** Blue 291,*** Yellow 114,and *** Orange 30(B-291,Y-114 and O-30),and titanium dioxide(TiO_(2))on the viscose *** on the excellent red edge property of B-291 and high scattering ability of TiO2,DGM and LGM exhibited generally high spectral correlation coefficients r_(m)(>0.95)with green plant ***,with the great color performance,excellent objects covering performance,low areal density(7.7 MPa),high softness(>81.27),high air permeability(>45.848 mm s^(−1)),DGM and LGM showed good simulation performance and wearing comfort to satisfy the application *** work presents a high-similarity Vis–NIR-CMs as a reference for full-spectrum camouflage materials,as well as low-cost and efficient preparation method is beneficial to the development of camouflage field.

关键词： Vis-NIR Camouflage materials Plant leaves Organic dyes Viscose fabrics

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Dynamics modeling and pressure control of composites tape winding system based on LQSMC

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Chinese Journal of Aeronautics 2020年第2期33卷 740-748页

作者： Qi hong Yaoyao SHI Danni lu The Key Laboratory of Contemporary Design and Integrated Manufacturing Technology Ministry of Education Northwestern Polytechnical UniversityXi’an 710072China

Pressure fluctuations during the composite fiber winding process seriously affect the produces compactness strength,fatigue resistance,stress uniformity,and resin *** accuracy of pressure control systems is affected by nonlinear disturbances,such as friction,parameter perturbation,and measurement noise.A robust control algorithm based on linear quadratic optimal control and sliding mode control(LQSMC)is proposed to overcome these *** method is based on the system state space expression and linear quadratic optimal *** state space model of the system is improved by using a Kalman filter and control input for state estimation,and a new sliding surface equation is *** ameliorated control algorithm exhibits good performance and can effectively suppress sliding mode control(SMC)*** and experimental results show that LQSMC offers high control precision,much stronger antiinterference,and robustness,which can effectively improve the positioning and tracking accuracy of a pressure control system compared with linear quadratic optimal control(LQC).The winding pressure control precision is improved by 45%to 50%.The results show that the porosity of composite fiber tape winding products decreased thanks to our method.

关键词： Composites tape winding Dynamics modeling Kalman filter LQSMC Pressure control

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Expression of long non-coding RNAs in complete transection spinal cord injury: a transcriptomic analysis

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Neural Regeneration Research 2020年第8期15卷 1560-1567页

作者： lu Ding Wen-Jin Fu hong-Yan Di Xiao-Min Zhang Yu-tian Lei Kang-Zhen Chen Tao Wang hong-Fu Wu Institute of Stem Cells and Regenerative Medicine Department of PhysiologyGuangdong Medical UniversityDongguanGuangdong ProvinceChina Scientific Research Center the Seventh Affiliated Hospital of Sun Yat-Sen UniversityShenzhenGuangdong ProvinceChina Clinical Laboratory Houjie Hospital of Guangdong Medical UniversityDongguanGuangdong ProvinceChina Department of Neurology Dalingshan HospitalDongguanGuangdong ProvinceChina Department of Hand&Foot Surgery Houjie Hospital of Guangdong Medical UniversityDongguanGuangdong ProvinceChina Department of Surgery the Third Hospital of Guangdong Medical University(Longjiang Hospital of Shunde District)FoshanGuangdong ProvinceChina

Long non-coding RNAs(lncRNAs)are abundantly expressed in the central nervous system and exert a critical role in gene regulation via multiple biological *** uncover the functional significance and molecular mechanisms of lncRNAs in spinal cord injury(SCI),the expression signatures of lncRNAs were profiled using RNA sequencing(RNA-seq)technology in a Sprague-Dawley rat model of the 10th thoracic vertebra complete transection *** showed that 116 of 14,802 detected lncRNAs were differentially expressed,among which 16—including eight up-regulated(H19,Vof16,Hmox2-ps1,LOC100910973,Ybx1-ps3,Nnat,Gcgr,LOC680254)and eight down-regulated(Rmrp,Terc,Ngrn,Ppp2r2b,Cox6a2,Rpl37a-ps1,LOC360231,Rpph1)—demonstrated fold changes>2 in response to transection SCI.A subset of these RNA-seq results was validated by quantitative real-time *** levels of 821 mRNAs were also significantly altered post-SCI;592 mRNAs were up-regulated and 229 mRNAs were down-regulated by more than *** Ontology(GO)and Kyoto Encyclopedia of Genes and Genomes(KEGG)analyses showed that differentially expressed mRNAs were related to GO biological processes and molecular functions such as injury and inflammation response,wound repair,and apoptosis,and were significantly enriched in 15 KEGG pathways,including cell phagocytosis,tumor necrosis factor alpha pathway,and leukocyte *** results reveal the expression profiles of lncRNAs and mRNAs in the rat spinal cord of a complete transection model,and these differentially expressed lncRNAs and mRNAs represent potential novel targets for SCI *** suggest that lncRNAs may play an important role in the early immuno-inflammatory response after spinal cord *** study was approved by the Administration Committee of Experimental Animals,Guangdong Province,China.

关键词： cell apotosis complete transection injury high throughput sequencing inflammation ischemia related factor vof-16 long non-coding RNA secondary damage spinal cord TNF signaling transcriptomes

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Diastereoselective Michael Addition of (4'S)-Ethyl-3-(2',2'-Dimethyl-1',3'- dioxolan-4'-yl) acrylate with Furyl Lithium

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Chinese Chemical Letters 2001年第5期12卷 403-406页

作者： Dong Mei HAN Xun tian JIANG Jian hong CHEN Bin WANG Dong lu BAI Shanghai Institute of Meteria Medica Shanghai Institutes for Biological SciencesChinese Academy of SciencesShanghai 200031

Michael addition of the chiral alpha,beta -unsaturated ester 2 with furyl lithium proceeded in syn manner with excellent diastereoselectivity. The diastereoselectivity was not affected by the configuration of the doub... 详细信息

关键词： Michael addition configuration determination syn addition.

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Unveiling non-radiative center control in CsPbBr_(3) nanocrystals:A comprehensive comparative analysis of hot injection and ligandassisted reprecipitation approaches

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Nano Research 2024年第5期17卷 4525-4534页

作者： Daocheng hong Yuchen Zhang Shuhan Pan Hanyu Liu Wei Mao Wanli Zhang Yuhui Ye Zhihong Wei Xuxing lu Xiaoyong Wang Zhenda lu Yuxi tian Key Laboratory for Advanced Technology in Environmental Protection of Jiangsu Province Yancheng Institute of TechnologyYancheng 224051China Laboratory of Mesoscopic Chemistry of MOE School of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210023China College of Engineering and Applied Sciences Nanjing UniversityNanjing 210023China National Laboratory of Solid State Microstructures School of PhysicsCollaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210093China School of Electronic Electrical Engineering and PhysicsFujian University of TechnologyFuzhou 350118China

Metal-halide perovskite nanocrystals(NCs)have gained significant attention in the field of optoelectronic and photonic devices due to their promising *** their exceptional optical properties,the impact of different synthetic strategies on the fundamental nature of NCs,such as nonradiative recombination centers,remains poorly *** this study,we investigated the photophysical properties of CsPbBr_(3) NCs synthesized using two distinct methods,hot injection and ligand-assisted reprecipitation,at the individual particle *** observed different blinking behaviors under specific photoexcitation power densities and proposed,through intensity-lifetime analysis and Monte-Carlo simulations,that these different synthetic strategies can fabricate NCs with similar crystal structures but distinct surface quenchers with varying energy levels,which significantly affected the photo-induced blinking-down and blinking-up behaviors in individual *** findings indicate a practical and feasible approach for controlling defect engineering in perovskite NCs,with significant implications for their use in optoelectronic and other technological applications.

关键词： metal-halide perovskite nanocrystals photophysical properties nonradiative recombination centers hot injection method ligand-assisted reprecipitation

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An Emotion Analysis Method Using Multi-Channel Convolution Neural Network in Social Networks

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Computer Modeling in Engineering & Sciences 2020年第10期125卷 281-297页

作者： Xinxin lu hong Zhang School of Computer Science and Technology Zhoukou Normal UniversityZhoukou466001China School of Network Engineering Zhoukou Normal UniversityZhoukou466001China

As an interdisciplinary comprehensive subject involving multidisciplinary knowledge,emotional analysis has become a hot topic in psychology,health medicine and computer *** has a high comprehensive and practical application *** research based on the social network is a relatively new topic in the field of psychology and medical health *** text emotion analysis of college students also has an important research significance for the emotional state of students at a certain time or a certain period,so as to understand their normal state,abnormal state and the reason of state change from the information they *** view of the fact that convolutional neural network cannot make full use of the unique emotional information in sentences,and the need to label a large number of highquality training sets for emotional analysis to improve the accuracy of the model,an emotional analysismodel using the emotional dictionary andmultichannel convolutional neural network is proposed in this ***,the input matrix of emotion dictionary is constructed according to the emotion information,and the different feature information of sentences is combined to form different network input channels,so that the model can learn the emotion information of input sentences from various feature representations in the training ***,the loss function is reconstructed to realize the semi supervised learning of the ***,experiments are carried on COAE 2014 and self-built data *** proposed model can not only extract more semantic information in emotional text,but also learn the hidden emotional information in emotional *** experimental results show that the proposed emotion analysis model can achieve a better classification *** with the best benchmark model gram-CNN,the F1 value can be increased by 0.026 in the self-built data set,and it can be increased by 0.032 in the COAE 2014 data set.

关键词： Emotion analysis model emotion dictionary convolution neural network semi supervised learning deep learning pooling feature feature mapping

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