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Chinese Journal of Structural Chemistry 2019年第2期38卷 224-232,166页

作者： JIN feng YE Zhi-feng liao Rong-Bao QIAO Ling-Yan TAO Dong-Liang LIU yong College of Chemical and Material Engineering Fuyang Normal University College of Life Science Fuyang Normal University

An electron donor-π-bridge-electron acceptor(D-π-A) optical functional organic compound comprising a triphenylamine moiety as the electron donor and pyridine moiety as the electron acceptor was synthesized. The structure of the compound was solved by single-crystal X-ray diffraction analysis. It crystallizes in monoclinic, space group P21, with a = 9.753(5), b = 8.815(5), c = 25.554(5) ?, β = 96.315(5)°, V = 2184(2) ?~3, Z = 2, D_c = 1.136 g/m^3, F(000) = 792, Μr = 746.92, μ = 0.069 mm^(-1), the final R = 0.0658 and wR = 0.1730 for 6790 observed reflections with I > 2(I). Study of nonlinear optical properties shows that the compound exhibits excellent two-photon excited fluorescence with the two-photon absorption cross-section value of 116 GM. The structure-property relationship was researched in detail through X-ray crystallography and quantum chemical calculation. Result of living cell imaging experiment shows its potential in fluorescence microscopy bioimaging.

关键词： triphenylamine crystal structure two-photon excited fluorescence bioimaging

Direct Laser Writing Facility for Fabrication of Submicron Mask

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Chinese Physics Letters 2014年第4期31卷 185-188页

作者： ZHU feng MA Jian-yong Information Optics Laboratory Shanghai Institute of Optics and Fine Mechanics Chinese Academy of Sciences Shanghai 201800

Direct laser writing technique has become a well-established, multi-functional and flexible method for fabricating high quality diffractive optical elements. We propose and build a maskless direct laser writing system with the ability to produce a sub-micron feature size. The high precision lithography is realized by using the astigmatic autofocus method. The minimum feature size of the system, breaking through the diffraction limit with the chromium layer, can achieve 300hm with the 405nm blue laser. A 50 x 50ram2 chromium grating mask with a period of 1 #m and line width of 300 nm is fabricated. This facility will be useful for the fabrication of large-scale submicron diffraction optical elements in the future.

关键词： FABRICATION (Manufacturing) DIFFRACTIVE optical elements CHROMIUM -- Spectra BLUE lasers OPTICAL diffraction ASTIGMATISM (Optics)

On Black Hole Thermodynamics and Back-reaction

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Chinese Physics Letters 1991年第3期8卷 118-121页

作者： HUANG Chaoguang LIU liao XU feng Institute of High Energy Physics Academia SinicaBeijing 100039 Department of Physics Beijing Normal UniversityBeijing 100875 Department of Physics Yunnan Normal UniversityKunming 650098

It is shown in this paper that there is a difficulty in conventional black hole *** overcome the difficulty we introduce a“surface”near the event horizon as an additional thermodynamical *** mass and entropy of the additional“surface”are the same as the correction of mass of Schwarzschild black hole obtained in the back-reaction program up to a constant *** implies that some effects of back reaction an automatically considered in our thermodynamic phenomenological treatment.

关键词： difficulty implies overcome

Initiation, Development and Stabilization of Cavities during Tensile Deformation of Semicrystalline Polymers

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Chinese Journal of Polymer Science 2018年第10期36卷 1195-1199页

作者： Ying Lu yong-feng Men State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 China University of Science and Technology of China Hefei 230026 China

By using polybutene-1 as a typical example, we illustrate the initiation, development and stabilization of cavities in the sample during tensile deformation. Samples with the same crystallinity, long spacing and crystalline lamellar thickness but very different sizes of spherulites were prepared via changing the melt history. Dimension of cavities during stretching the samples was determined by in situ ultra small angle X-ray scattering techniques. It turned out that the size of the cavities was bigger in the sample with larger spherulites than the one with smaller spherulites. The results show clear evidence of initiating cavities within crystalline phase at the grain-boundary of crystalline blocks, growing of cavities passing through parallel stacked lamellar crystals and amorphous layers and finally stablized by tilted lamellae at both ends of the plate-like cavities within the spherulites.

关键词： Cavitation Deformation Polymer Polubutene-1 Spherulite

Grain boundary characteristics and tensile properties of Ti14 alloy after semi-solid deformation

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International Journal of Minerals,Metallurgy and Materials 2011年第5期18卷 576-581页

作者： yong-nan Chen Jian-feng Wei yong-qing Zhao School of Materials Science and Engineering Chang＇an University Xi＇an 710064 China State Key Laboratory for Mechanical Behavior of Materials Xi＇an Jiaotong University Xi＇an 710049 China Northwest Institute for Nonferrous Metal Research Xi＇an 710016 China

The microstructure and room-temperature tensile properties of Ti14,a new α＋Ti2Cu alloy,were investigated after conventional forging at 950°C and semi-solid forging at 1000 and 1050°C,*** show that coarse grains and grain boundaries are obtained in the semi-solid *** coarse grain boundaries are attributed to Ti2Cu phase precipitations occurred on the grain boundaries during the *** is found that more Ti2Cu phase precipitates on the grain boundaries at a higher semi-solid forging temperature,which forms precipitated zones and coarsens the grain *** tests exhibit high strength and low ductility for the semi-solid forged alloys,especially after forging at 1000°*** analysis reveals the evidence of ductile failure mechanisms for the conventional forged alloy and cleavage fracture mechanisms for the alloy after semi-solid forging at 1050°C.

关键词： titanium alloys semi-solid forging grain boundaries tensile properties fracture

High Accuracy Split-Step Finite Difference Method for Schrdinger-KdV Equations

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Communications in Theoretical Physics 2018年第10期70卷 413-422页

作者： feng liao Lu-Ming Zhang School of Mathematics and Statistics Changshu Institute of TechnologyChangshu 215500China College of Science Nanjing University of Aeronautics and AstronauticsNanjing 211106China

In this article, two split-step finite difference methods for Schrodinger-KdV equations are formulated and investigated. The main features of our methods are based on:(i) The applications of split-step technique for Schrodingerlike equation in time.(ii) The utilizations of high-order finite difference method for KdV-like equation in spatial discretization.(iii) Our methods are of spectral-like accuracy in space and can be realized by fast Fourier transform efficiently. Numerical experiments are conducted to illustrate the efficiency and accuracy of our numerical methods.

关键词： split-step method SchrSdinger-KdV equations finite difference method fast Fourier transform

DQL-Based Intelligent Scheduling Algorithm for Automatic Driving in Massive MIMO V2I Scenarios

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China Communications 2023年第3期20卷 18-26页

作者： yong liao Zisong Yin Zhijing Yang Xuanfan Shen School of Microelectronics and Communication Engineering Chongqing UniversityChongqing 400044China

Connected and autonomous vehicle(CAV)vehicle to infrastructure(V2I)scenarios have more stringent requirements on the communication rate,delay,and reliability of the Internet of vehicles(Io V).New radio vehicle to everything(NR-V2X)adopts link adaptation(LA)to improve the efficiency and reliability of road safety information *** order to solve the problem that the existing LA scheduling algorithms cannot adapt to the Doppler shift and complex fast time-varying channel in V2I scenario,resulting in low reliability of information transmission,this paper proposes a deep Q-learning(DQL)-based massive multiple-input multiple-output(MIMO)LA scheduling algorithm for autonomous driving V2I *** algorithm combines deep neural network(DNN)with Q-learning(QL)algorithm,which is used for joint scheduling of modulation and coding scheme(MCS)and space division multiplexing(SDM).The system simulation results show that the algorithm proposed in this paper can fully adapt to the different channel environment in the V2I scenario,and select the optimal MCS and SDM for the transmission of road safety information,thereby the accuracy of road safety information transmission is improved,collision accidents can be avoided,and bring a good autonomous driving experience.

关键词： NR autonomous driving V2I link adap-tation massive MIMO deep Q-learning

Enhancing m^(6)A modification in the motor cortex facilitates corticospinal tract remodeling after spinal cord injury

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Neural Regeneration Research 2025年第6期20卷 1749-1763页

作者： Tian Qin Yuxin Jin Yiming Qin Feifei Yuan Hongbin Lu Jianzhong Hu yong Cao Chengjun Li Department of Spine Surgery and Orthopedics Xiangya HospitalCentral South UniversityChangshaHunan ProvinceChina Key Laboratory of Organ Injury Aging and Regenerative Medicine of Hunan ProvinceChangshaHunan ProvinceChina National Clinical Research Center for Geriatric Disorders Xiangya HospitalCentral South UniversityChangshaHunan ProvinceChina Department of Sports Medicine Xiangya HospitalCentral South UniversityChangshaHunan ProvinceChina

Spinal cord injury typically causes corticospinal tract disruption. Although the disrupted corticospinal tract can self-regenerate to a certain degree, the underlying mechanism of this process is still unclear. N6-methyladenosine(m^(6)A) modifications are the most common form of epigenetic regulation at the RNA level and play an essential role in biological processes. However, whether m^(6)A modifications participate in corticospinal tract regeneration after spinal cord injury remains unknown. We found that expression of methyltransferase 14 protein(METTL14) in the locomotor cortex was high after spinal cord injury and accompanied by elevated m^(6)A levels. Knockdown of Mettl14 in the locomotor cortex was not favorable for corticospinal tract regeneration and neurological recovery after spinal cord injury. Through bioinformatics analysis and methylated RNA immunoprecipitation-quantitative polymerase chain reaction, we found that METTL14 regulated Trib2 expression in an m^(6)A-regulated manner, thereby activating the mitogen-activated protein kinase pathway and promoting corticospinal tract regeneration. Finally, we administered syringin, a stabilizer of METTL14, using molecular docking. Results confirmed that syringin can promote corticospinal tract regeneration and facilitate neurological recovery by stabilizing METTL14. Findings from this study reveal that m^(6)A modification is involved in the regulation of corticospinal tract regeneration after spinal cord injury.

关键词： corticospinal tract remodeling epigenetic regulations locomotor cortex m^(6)A modification methyltransferase 14 protein(METTL14) mitogen-activated protein kinase neural regeneration spinal cord injury syringin TRIB2

Microstructure evolution of a new near-β titanium alloy:Ti555211 during high-temperature deformation

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Rare Metals 2015年第11期34卷 757-763页

作者： Zhen An Jin-Shan Li yong feng State Key Laboratory of Solidification Processing Northwestern Polytechnical University

The isothermal compression testing of Ti555211 titanium alloys was carried out at deformation temperatures from 750 to 950 ℃ in 50 ℃ intervals,with strain rate of 0.001-1.000 s-1and height reduction of 20%-60%.The effect of processing parameters（deformation temperature,strain rate and deformation degree） on the microstructure evolution and the microstructure variables was *** results show that the content of primary α phase decreases with the increase in deformation *** effect of strain rate on microstructure variables of isothermally compressed Ti555211 alloy is mainly dependent on the deformation *** fine second α phase partly transforms to β phase due to the deformation heat effect at the high strain rate,α phase becomes globular with temperature increasing and strain rate *** contrast,α phase is refined with temperature decreasing and strain rate *** deformation degree has a little influence on the grain size and the morphology of primary α phase,but the effect of deformation degree on the morphology of second α phase is *** larger deformation degree is in favor of the globularization of lamellar α structure.

关键词： Titanium alloy High-temperature deformation Micros

Piling up multidecker pyrgos[n]cages as antibacterial materials

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Science China Materials 2025年第01期 314-316页

作者： Miguel A.Liuzzi-Vaamonde Jackson B.Lancaster Samantha A.Mason Yuanning feng Department of Chemistry and Biochemistry The University of Oklahoma

The development of antibiotics is regarded as one of the most significant scientific advances in modern medicine. Before the commercialization of antibiotics, infectious diseases were catastrophic throughout history [1]. Penicillin was used to treat serious infections in the 1940s, but unfortunately, with the introduction of antibiotics came the emergence of antibiotic resistance [2,3]. Evolved and adapted methicillin-resistant Staphylococcus aureus (MRSA) strains are presently impacting community and healthcare systems across the globe [4].

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