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The novel roles of circular RNAs in metabolic organs

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Genes & Diseases 2018年第1期5卷 16-23页

作者： Zhi-Chun Zhang xiao-long Guo xi Li Biology Science Institutes Chongqing Medical UniversityChongqing 400016PR China

Circular RNAs(circRNAs)with a covalently closed loop structure which was different with linear RNAs,recently re-merged as novel regulator and exerted function in multiple biological *** deep RNA sequencing(RNA-seq)technology coupled with bioinformatic analyses,a number of circRNAs has been ***,circRNAs exhibit tissue-and development-specific expression indicating their potential biological ***,function of circRNAs as miRNA sponge has been well demonstrated in some diseases,besides,circRNAs also could function as RNA binding protein sponge and regulate alternative splicing and gene ***,Emerging evidences showed that circRNAs played a pivotal role on the development of diseases including atherosclerotic vascular disease,neurological disorders and liver diseases,and served as diagnostic or predictive biomarkers of some *** review mainly discusses the current advance of circRNAs as regulator involved in many diseases,and highlights circRNAs which have been well elucidated biological and pathogenic mechanism.

关键词： Brain Circular RNAs Liver Metabolic disease Metabolism

New Families of Exact Excitations to （2＋1）-Dimensional Toda Lattice System via an Extended Projective Approach

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Communications in Theoretical Physics 2006年第5期45卷 864-868页

作者： FANG Jian-Ping FEI Jin-xi ZHENG Chun-long College of Physics and Mathematics Lishui University Lishui 323000 China Shanghai Institute of Applied Mathematics and Mechanics Shanghai University Shanghai 200072China

In this paper, the extended projective approach, which was recently presented and successfully used in some continuous nonlinear physical systems, is generalized to nonlinear partial differential-difference systems （DDEs）, As a concrete example, new families of exact solutions to the （2＋1）-dimensional Toda lattice system are obtained by the extended projective approach.

关键词： extended projective approach DDEs Toda lattice exact solution

AI-2 Key Enzyme S-Ribosylhomocysteinase from Strain Klebsiella pneumoniae CICC 10011 Producing 2,3-Butanediol

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Chemical Research in Chinese Universities 2011年第2期27卷 273-276页

作者： dai Jian-ying ZHANG Li-fu xiU Zhi-long School of Life Science and Biotechnology Dalian University of Technology Dalian 116024 P. R. China

S-Ribosylhomocysteinase（LuxS） is the key enzyme in the synthetic pathway of a quorum sensing autoinducer AI-2. LuxS from a 2,3-butanediol produced strain Klebisella pneumoniae CICC 10011 was cloned and characterized. The luxS gene is composed of 540 bp with 172 amino acids encoded. The Km value for S-ribosylhomo- cysteine（SRH） was （27±1） umol/L, kcat was （0.112±0.004） s-1 and kcat/Km was 4.4×103 L umol-1·s-1 at 25 ℃. LuxS was activated by divalent metal ions, the highest activity was detected with Co2＋ form, followed by Mg2＋, Ba2＋, Mn2＋, Fe2＋ and Ca2＋, and activation constant for Co2＋ is （16±2） umol/L.

关键词： S-Ribosylhomocysteinase(LuxS) Kinetics Characterization Klebsiellapneumoniae

Surface Effects on the Postbuckling of Nanowires

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Chinese Physics Letters 2011年第4期28卷 171-174页

作者： LI Bin LI Chuan-xi WEI Cheng-long Key Laboratory of Highway Engineering(Ministry of Education) Changsha University of Science&TechnologyChangsha 410076 Department of Civil Engineering Hunan Institute of Science and TechnologyYueyang 414000

A core-shell model that accounts for surface effects is suggested to investigate the postbuckling behavior of *** corresponding critical load,buckling wavenumber and amplitude incorporated in the surface effects are analytically *** results demonstrate that the surface effects have a strong influence on the buckling amplitude of each *** study can not only shed light on the postbuckling of nannowires but also provide an method for measuring the physical parameters of nanowires used in nano-devices.

关键词： order buckling postbuckling

A Simplified Method for the Stress Analysis of Underground Transfer Structures Crossing Multiple Subway Tunnels

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Computer Modeling in Engineering & Sciences 2024年第6期139卷 2893-2915页

作者： Shen Yan Dajiang Geng Ning dai Mingjian long Zhicheng Bai College of Civil Engineering Tongji UniversityShanghai200092China China Construction 4th Engineering Bureau 6th Corp. Ltd.Shanghai201199China Department of Civil and Architecture Engineering Hubei Polytechnic UniversityHuangshi435003China

According to the design specifications,the construction of extended piles involves traversing the tunnel’s upper region and extending to the underlying rock *** address this challenge,a subterranean transfer structure spanning multiple subway tunnels was *** on the function of piles in the transfer structure as springs with axial and bending stiffness,and taking into account the force balance and deformation coordination conditions of beams and plates within the transfer structure,we established a simplified mechanical model that incorporates soil stratification by combining it with the Winkler elastic foundation beam *** resolved established simplifiedmechanicalmodel employed finite difference technology and the Newton-Simpsonmethod,elucidating the mechanical mechanism of the transfer *** research findings suggest that the load carried by the upper structural columns can be transferred to the pile foundation beneath the beams through the transfer structure,subsequently reaching the deep soil layer and ensuring minimal impact on adjacent *** established simplified analysis method can be used for stress analysis of the transfer structure,concurrently considering soil stratification,pile foundation behavior,and plate *** pile length,pile section size,and beam section size within the transfer structure should account for the characteristics of the upper load,ensuring an even distribution of the beam bending moment.

关键词： Crossing tunnels transfer structure force mechanism simplify analysis layered soil mass

Growth and property enhancement of Er^(3+)-doped 0.68Pb(Mg_(1/3)Nb_(2/3))O_3-0.32PbTiO_3 single crystal

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Journal of Rare Earths 2018年第8期36卷 832-837页

作者： Wei long xing Chu Zengzhe xi Pinyang Fang xiaojuan Li Wenwu Cao Shaanxi Key Laboratory of Photoelectric Functional Materials and Devices School of Materials and Chemical Engineering Xi'an Technological University Condensed Matter Science and Technology Institute Harbin Institute of Technology Department of Mathematics and Materials Research Institute The Pennsylvania State University

Er^3＋-modified 0.68 Pb（Mg（1/3）Nb（2/3））O3-0.32 PbTiO3（PMN-32 PT） single crystals were grown by using the flux method. The growth mechanism of the crystal and influences of Er^3＋ ions on phase structure,electrical and optical properties were investigated. Results reveal that the crystals are still pure perovskite structure with Er3＋ ions doping, but lattice enlarges slightly. The coercive electric field is increased from 4.83 to 6.37 kV/cm for [100]-oriented crystals comparing to undoped PMN-32 PT single ***, the crystal exhibits upconversion emission properties. Green（531 and 552 nm） and red（670 nm） emission bands are recorded under the excitation of 980 nm diode laser, which correspond to the ^2 H（11/2）→^4 I（15/2）, ^4 S（3/2）→^4 I（15/2） and ^4 F（9/2）→^4 I（15/2） transitions of Er^3＋ ions. Our results show the feasibility of using this crystal in photoelectric multifunctional devices.

关键词： PMN-PT single crystal Er^3+ ion doping Flux method Upconversion Rare earths

A new member of the topological semimetals family

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National Science Review 2017年第6期4卷 798-799页

作者： Hongming Weng Chen Fang Zhong Fang xi dai Beijing National Laboratory for Condensed Matter Physics and Institute of PhysicsChinese Academy of Sciences Collaborative Innovation Center of Quantum Matter

In topological semimetals(TSMs),the quasi-particle excitations of electrons can be described by the Dirac or Weyl equation,mimicking the elusive massless Dirac or Weyl fermions in the low-frequency regime as emergent ... 详细信息

关键词： A new member of the topological semimetals family DSM WSM

Efficient optimization of electron transfer pathway by constructing phosphide/ceria interface boosts seawater hydrogen production

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Journal of Energy Chemistry 2024年第8期95卷 490-498,I0011页

作者： Yifan Zhao Lingfeng Yang Youyu long Min xi Anran Chen Hua Zhang School of Materials and Energy Yunnan UniversityKunming 650091YunnanChina Electron Microscopy Centre of Yunnan University Yunnan UniversityKunming 650091YunnanChina

Developing efficient and durable hydrogen evolution reaction(HER)electrocatalysts is one of the most important issues for the commercialization of seawater electrolysis,but it remains ***,we report a CeO_(2)-CoP nanoneedle array catalyst loaded on Ti mesh(CeO_(2)-CoP/TM)with workfunction-induced directional charge transport *** CeO_(2)-CoP/TM catalyst showed superior HER catalytic activity and stability,with over potentials of 41 and 60 mV to attain 10 mA cm^(-2),in 1 M KOH and 1 M KOH+seawater electrolyte,*** results and theoretical calculations reveal that the work function drives the charge transfer from CeO_(2)to CoP,which effectively balances the electronic density of CoP and CeO_(2),optimizes the d-band center,and accelerates the water activation kinetics,thus enhancing the HER *** solar-driven water electrolysis device displays a high and stable solar-to-hydrogen conversion efficiency of 19.6%.This study offers a work function-induced directional charge transport strategy to design efficient and durable catalysts for hydrogen production.

关键词： Work function Heterostructure Charge transport Seawater splitting Solar-to-hydrogen

Micro-expression recognition algorithm based on the combination of spatial and temporal domains

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High Technology Letters 2021年第3期27卷 303-309页

作者： Wu Jin xi Meng dai Wei Wang Lei Wang xinran School of Electronic and Engineering Xi’an University of Posts and TelecommunicationsXi'an 710121P.R.China

Aiming at the problem of unsatisfactory effects of traditional micro-expression recognition algorithms,an efficient micro-expression recognition algorithm is proposed,which uses convolutional neural networks(CNN)to extract spatial features of micro-expressions,and long short-term memory network(LSTM)to extract time domain *** and LSTM are combined as the basis of micro-expression *** many CNN structures,the visual geometry group(VGG)using a small convolution kernel is finally selected as the pre-network through *** to the difficulty of deep learning training and over-fitting,the dropout method and batch normalization method are used to solve the problem in the VGG *** data sets CASME and CASME II are used for test comparison,in order to solve the problem of insufficient data sets,randomly determine the starting frame,and a fixedlength frame sequence is used as the standard,and repeatedly read all sample frames of the entire data set to achieve trayersal and data ***.a hieh recognition rate of 67.48% is achieved.

关键词： micro-expression recognition convolutional neural network(CNN) long short-term memory(LSTM) batch normalization algorithm dropout