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35篇 您的检索式:作者名="Yanan Ren"
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1A review:Photonics devices,architectures,and algorithms for optical neural computing显示文摘The explosive growth of data and information has motivated various emerging non-von Neumann computational approaches in the More-than-Moore era.Photonics neuromorphic computing has attracted lots of attention due to the fascinating advantages such as high speed,wide bandwidth,and massive parallelism.Here,we offer a review on the optical neural computing in our research groups at the device and system levels.The photonics neuron and photonics synapse plasticity are presented.In addition,we introduce several optical neural computing architectures and algorithms including photonic spiking neural network,photonic convolutional neural network,photonic matrix computation,photonic reservoir computing,and photonic reinforcement learning.Finally,we summarize the major challenges faced by photonic neuromorphic computing,and propose promising solutions and perspectives.Shuiying Xiang Yanan Han Ziwei Song Xingxing Guo Yahui Zhang Zhenxing Ren Suhong Wang Yuanting Ma Weiwen Zou Bowen Ma Shaofu Xu Jianji Dong Hailong Zhou Quansheng Ren Tao Deng Yan Liu Genquan Han Yue Hao 2021Journal of Semiconductors2021,42,2:7
2A complete genome assembly of Glaciecola mesophila sp. nov. sequenced by using BIGIS-4 sequencer system显示文摘Using a pyrosequencing-based custom-made sequencer BIGIS-4, we sequenced a Gram-negative bacterium Glaciecola mesophila sp. nov. (Gmn) isolated from marine invertebrate specimens. We generated 152043 sequencing reads with a mean high-quality length of 406 bp, and assembled them using the BIGIS-4 post-processing module. No systematic low-quality data was detected beyond expected homopolymer-derived errors. The assembled Gmn genome is 5144318 bp in length and harbors 4303 annotated genes. A large number of metabolic genes correspond to various nutrients from surface marine invertebrates. Its abundant cold-tolerant and cellular signaling and related genes reveal a fundamental adaptation to low-temperature marine environment.YUAN LiNa REN LuFeng LI YunTao HAN WeiJing YU Yong CHU YaNan LIU GuiMing YU Dan TENG MingJing WANG Liang WANG XuMin ZHOU XiaoGuang YU YuDe YU Jun 2011Science China(Life Sciences)2011,54,9:4
3Study of Oxygen Vacancies on Different Facets of Anatase TiO2显示文摘Anatase TiO2 samples with different ratios of {101} to {001} facets were prepared with hydrothermal method and further treated under three specific calcination atmospheres (air,H2,N2).The characterization results indicate that {001} facets may generate more oxygen vacancies and more Ti3+ species than {101} facets.Yanan Wu Yingyi Fu Li Zhang Yuanhang Ren Xueying Chen Bin Yue Heyong He 2019Chinese Journal of Chemistry2019,37,9:4
4Delay-weight plasticity-based supervised learning in optical spiking neural networks显示文摘We propose a modified supervised learning algorithm for optical spiking neural networks,which introduces synaptic time-delay plasticity on the basis of traditional weight training.Delay learning is combined with the remote supervised method that is incorporated with photonic spike-timing-dependent plasticity.A spike sequence learning task implemented via the proposed algorithm is found to have better performance than via the traditional weight-based method.Moreover,the proposed algorithm is also applied to two benchmark data sets for classification.In a simple network structure with only a few optical neurons,the classification accuracy based on the delay-weight learning algorithm is significantly improved compared with weight-based learning.The introduction of delay adjusting improves the learning efficiency and performance of the algorithm,which is helpful for photonic neuromorphic computing and is also important specifically for understanding information processing in the biological brain.Yanan Han Shuiying Xiang Zhenxing Ren Chentao Fu Aijun Wen Yue Hao 2021Photonics Research2021,9,4:4
5Endoplasmic reticulum stress contributed to β1-adrenoceptor autoantibody-induced reduction of autophagy in cardiomyocytes显示文摘Autophagy reduction has been confirm ed as an im portant mechanism in apoptosis induction.Our previous study showed that decreased autophagy induced by Pi-adrenoceptor autoantibodies(Pi-AAs)enhanced cardiom yocyte apoptosis and contributed to heart failure progression.Endoplasmic reticulum stress(ERS)is known to be an im portant mechanism in intracellular homeostasis and is closely related to autophagy.However,ERS in pi-AA-induced autophagy dysfunction of cardiom yocytes remains unclear.In this study,we used an active im m unization rat model and H9c2 cardiom yocytes to study the role of ERS in Pi-AA-induced autophagy.Results showed that prolonged action of Pi-AAs significantly reduced the autophagy of myocardial tissues and H9c2 cardiom yocytes,and ERS and its related apoptotic pathways were significantly activated.Moreover,mRFP-GFP-LC3 double-labeled adenoviruses were used to detect cardiom yocyte autophagic flux to confirm that Pi-AAs caused a significant decrease in autophagic flux in H9c2 cardiom yocytes.The ERS inhibitor,4-phenylbutyrate(4-PBA),partially attenuated the β1-AA-induced reduction of cardiom yocyte autophagy,consistent w ith the effect of the m am m alian target of rapam ycin inh ibito r rapamycin(Rapa).Compared to the pretreatm ent with 4-PBA or Rapa alone,pretreatm ent w ith the com bination of 4-PBA and Rapa had a greater effect on attenuating the pi-AA-induced decrease in autophagy and Pi-AA-induced apoptosis in cardiomyocytes.This study provides an experim ental basis fo r the role of Pi-AAs in the homeostatic maintenance of cardiom yocytes in patients w ith heart failure w ith respect to autophagy and ERS.Li Wang Na Ning Changtu Wang Xiaohong Hou Yuan Yuan Yanan Ren Cong Sun Zi Yan Xiaohui Wang Huirong Liu 2019Acta Biochimica et Biophysica Sinica2019,51,10:3
6Revealing the influence of high magnetic field on the solute distribution during directional solidification of Al-Cu alloy显示文摘The effect of the high magnetic field(MF)on the distribution of solute concentration during directional solidification of Al-Cu alloy under low growth speed was experimentally investigated.The amount of nonequilibrium eutectic is quantified via X-ray computed tomography(XCT)and demonstrated to reduce with the application of MF.Further,experimental results reveal that the MF alleviates the microsegregation and increases the average Cu concentration in solid solution,leading to the increases of the effective partition coefficient ke.It was also found that Cu concentration in solid solution increases continuously with the increasing intensity of MF,following the strengthening of micro-hardness.The change of ke under the MF is demonstrated to attribute to the thermoelectric magnetic convection(TEMC)in the mushy zone and the thermoelectric magnetic force(TEMF)acting on the solid.The TEMC is supposed to cause secondary convection owing to the inequality in flow velocities of circulation in different positions of dendrite stem.And the vacancies created by the proliferation and movement of dislocations induced by TEMF in the matrix is supposed to be able to capture solute atoms and thus enhance the solute concentration in the solid solution.Pengchuan Wang Sansan Shuai Chenglin Huang Xin Liu Yanan Fu Jiang Wang Zhongming Ren 2021Journal of Materials Science & Technology2021,,29:3
7Preferential expression of cytochrome CYP CYP2R1 but not CYP1B1 in human cord blood hematopoietic stem and progenitor cells显示文摘Cytochrome P450(CYP)enzymes metabolize numerous endogenous substrates,such as retinoids,androgens,estrogens and vitamin D,that can modulate important cellular processes,including proliferation,differentiation and apoptosis.The aim of this study is to characterize the expression of CYP genes in CD34+human cord blood hematopoietic stem and early progenitor cells(CBHSPCs)as a first step toward assessment of the potential biological functions of CYP enzymes in regulating the expansion or differentiation of these cells.CD34+CBHSPCs were purified from umbilical cord blood via antibody affinity chromatography.Purity of CD34+CBHSPCs was assessed using fluorescence-activated cell sorting.RNA was isolated from purified CD34+CBHSPCs and total mononuclear cells(MNCs)for RNA-PCR analysis of CYP expression.Fourteen human CYPs were detected in the initial screening with qualitative RT-PCR in CD34+CBHSPCs.Further quantitative RNA-PCR analysis of the detected CYP transcripts yielded evidence for preferential expression of CYP2R1 in CD34+CBHSPCs relative to MNCs;and for greater expression of CYP1B1 in MNCs relative to CD34+CBHSPCs.These findings provide the basis for further studies on possible functions of CYP2R1 and CYP1B1 in CBHSPCs'proliferation and/or differentiation and their potential utility as targets for drugs designed to modulate CD34+CBHSPC expansion or differentiation.Shuoqi Xu Zhihua Ren Yanan Wang Xinxin Ding Yongping Jiang 2014Acta Pharmaceutica Sinica B2014,4,6:2
8Experimental and numerical research on squat silo and large size horizontal warehouse during quasi-steady-state storage显示文摘Traditional method to prevent stored grain from deterioration is to control grain temperature.A three dimensional(3-D)numerical model was established to study the temperature variation in outdoor squat silo and large size horizontal warehouse at quasi-steady-state.In this research,porous media model and solar radiation model were adopted.Numerical and experimental results showed that grain temperature was influenced by temperature of wall,height of grain and the distance between grain and the wall.Temperature changes dramatically at the top layer of grain heap due to solar radiation and heat convection at air layer.Temperature of grain close to wall increased with the increasing of ambient temperature.The model established in this research is suitable for predicting grain temperature in outdoor squat silo and large size horizontal warehouse.Ren Guangyue Liu Yanan Peng Wei Duan Xu Zhang Ledao 2016International Journal of Agricultural and Biological Engineering2016,9,6:2
9Histones released by NETosis enhance the infectivity of SARS-CoV-2 by bridging the spike protein subunit 2 and sialic acid on host cells显示文摘Neutrophil extracellular traps(NETs)can capture and kill viruses,such as influenza viruses,human immunodeficiency virus(HIV),and respiratory syncytial virus(RSV),thus contributing to host defense.Contrary to our expectation,we show here that the histones released by NETosis enhance the infectivity of SARS-CoV-2,as found by using live SARS-CoV-2 and two pseudovirus systems as well as a mouse model.The histone H3 or H4 selectively binds to subunit 2 of the spike(S)protein,as shown by a biochemical binding assay,surface plasmon resonance and binding energy calculation as well as the construction of a mutant S protein by replacing four acidic amino acids.Sialic acid on the host cell surface is the key molecule to which histones bridge subunit 2 of the S protein.Moreover,histones enhance cell-cell fusion.Finally,treatment with an inhibitor of NETosis,histone H3 or H4,or sialic acid notably affected the levels of sgRNA copies and the number of apoptotic cells in a mouse model.These findings suggest that SARS-CoV-2 could hijack histones from neutrophil NETosis to promote its host cell attachment and entry process and may be important in exploring pathogenesis and possible strategies to develop new effective therapies for COVID-19.Weiqi Hong Jingyun Yang Jun Zou Zhenfei Bi Cai He Hong Lei Xuemei He Xue Li Aqu Alu Wenyan Ren Zeng Wang Xiaohua Jiang Kunhong Zhong Guowen Jia Yun Yang Wenhai Yu Qing Huang Mengli Yang Yanan Zhou Yuan Zhao Dexuan Kuang Junbin Wang Haixuan Wang Siyuan Chen Min Luo Ziqi Zhang Tiangi Lu Li Chen Haiying Que Zhiyao He Qiu Sun Wei Wang Guobo Shen Guangwen Lu Zhiwei Zhao Li Yang Jinliang Yang Zhenling Wang Jiong Li Xiangrong Song Lunzhi Dai Chong Chen Jia Geng Maling Gou Lu Chen Haohao Dong Yong Peng Canhua Huang Zhiyong Qian Wei Cheng Changfa Fan Yuquan Wei Zhaoming Su Aiping Tong Shuaiyao Lu Xiaozhong Peng Xiawei Wei 2022Cellular & Molecular Immunology2022,19,5:2
10Effect of agitation on the characteristics of air dense medium fluidization显示文摘In order to study the effect of agitation on the characteristics of air dense medium fluidization, we designed and constructed an agitation device. Analyses were then conducted on the fluidization characteristics curves, the bed density stability and the average bubble rise velocity Uaunder different agitation conditions. The results indicated that a lower bed pressure drop(without considering lower gas velocity in a fixed bed stage) and higher minimum fluidized velocity are achieved with increasing agitation speed.The height d(distance between the lower blades and air distribution plate) at which the agitation paddle was located had a considerable effect on the stability of the bed density at 9.36 cm/s < U < 10.70 cm/s. The higher the value of d, the better the stability, and the standard deviation of the bed density fluctuation r dropped to 0.0364 g/cm^3 at the ideal condition of d = 40 mm. The agitation speed also had a significant influence on the fluidization performance, and r was only 0.0286 g/cm^3 at an agitation speed of N = 75 r/min. The average bubble rise velocity decreased significantly with increasing agitation speed under the operating condition of 1.50 cm/s < U–U_(mf)< 3.50 cm/s. This shows that appropriate agitation contributes to a significant improvement in the fluidization quality in a fluidized bed, and enhances the separation performance of a fluidized bed.Wang Yanan Luo Zhenfu Huang Ge Ren Baojin 2016International Journal of Mining Science and Technology2016,26,3:2
11Polyaniline-based electrocatalysts through emulsion polymerization:Electrochemical and electrocatalytic performances显示文摘One of the major challenges associated with fuel cells is the design of highly efficient electrocatalysts to reduce the high overpotential of the oxygen reduction reaction(ORR). Here we report Polyaniline(PANI)based micro/nanomaterials with or without transition metals, prepared by the emulsion polymerization and subsequent heat treatment. PANI microspheres with the diameter of about 0.7 μm have been prepared in basic(NH3solution) condition, using two different types of surfactant(CTAB, SDS) as the stabilizer, ammonium persulphate(APS) as oxidant with aniline/surfactants molar ratio at 1/1 under the hydrothermal treatment. PANI nanorods, Fe–PANI, and Fe–Co–PANI have been synthesized in acidic(HCl)medium with aniline/surfactants molar ratio at 1/2 and polymerization carried out without stirring for24 h. Products mainly Fe–Co–PANI have shown high current density with increasing sweep rate and excellent specific capacitance 1753 F/g at the scan rate of 1 m V/s. Additionally, it has shown high thermal stability by thermogravimetric analysis(TGA). Fe–PANI has been investigated for excellent performance toward ORR with four electron selectivity in the basic electrolyte. The PANI-based catalysts from emulsion polymerization demonstrate that the method is valuable for making non-precious metal heterogeneous electrocatalysts for ORR or energy storage and conversion technology.Shehnaz Xuedan Song Suzhen Ren Ying Yang Yanan Guo Hongyu Jing Qing Mao Ce Hao 2017Journal of Energy Chemistry2017,26,1:1
12Multipurpose utilization of red mud 显示文摘Ren Dongmei Wang Yanan 2002Nonferrous Metals Ind2002,5,:1
13Comprehensive Utilization of Red mud 显示文摘REN Dongmei WANG Yanan 2002Nonferrous Metals Industry2002,,5:1
14Research for Mobile Robot Obstacle Avoidance System based on Ultrasonic Sensor显示文摘REN Yanan JIA Ruiqing HE Jintian 2012Chinese Test2012,20,3:1
15CRISPR Inversion of CTCF Sites Alters Genome Topology and Enhancer/Promoter Function显示文摘Ya Guo Quan Xu Daniele Canzio Jia Shou Jinhuan Li David U. Gorkin Inkyung Jung Haiyang Wu Yanan Zhai Yuanxiao Tang Yichao Lu Yonghu Wu Zhilian Jia Wei Li Michael Q. Zhang Bing Ren Adrian R. Krainer Tom Maniatis Qiang Wu 2015Cell2015,,:1
16Comprehensive Utilization of Red mud显示文摘REN Dongmei WANG Yanan 2002NonferrousMetals Industry2002,,5:1
17Surface functionalization of Polymers of Intrinsic Microporosity(PIMs)membrane by polyphenol for efficient CO_(2)separation显示文摘Membrane separation technology offers a green,efficient and energy-saving approach for biogas upgrading.Membranes with high selectivity and high permeability are the key to achieve high performance.Polymers of Intrinsic Microporosity(PIMs)materials have shown excellent gas permeability but low selectivity which limits their practical application.Herein,a polyphenol,tannic acid,was coated on the PIM-1 membrane surface by a facile dipping method to fabricate composite membranes.Tannic acid containing a large number of polar oxygencontaining groups(quinone,phenolic hydroxyl)self-polymerized on the membrane surface to form a CO2-philic,defect-free and thin layer.The CO2/CH4 selectivity of the resultant composite membranes was increased after tannic acid coating while the permeability remained comparable to or even higher than pristine PIM-1 membrane,exceeding the reported 2008 upper bound.Zhong Gao Yanan Wang Hong Wu Yanxiong Ren Zheyuan Guo Xu Liang Yingzhen Wu Yutao Liu Zhongyi Jiang 2021Green Chemical Engineering2021,2,1:1
18Probing tyrosine Z oxidation in photosystem II core complex isolated from spinach by EPR at liquid helium temperatures显示文摘Yanan Ren Chunxi Zhang Han Bao Jianren Shen Jingquan Zhao 2009Photosynthesis Research2009,,2:1
19Insights into the effect of substrate adsorption behavior over hemelike Fe_(1)/AC single-atom catalyst显示文摘Unraveling the substrate adsorption structure–performance relationship is pivotal for heterogeneous carbon supported metal single-atom catalysts(M_(1)/C SACs).However,due to the complexity of the functional groups on carbon material surface,it is still a great challenge.Herein,inspired by structure of enzymes,we used activated carbon(AC),which has adjustable surface oxygen functional groups(OFGs),supported atomically dispersed Fe-N_(4) sites as heme-like catalyst.And based on a combination of scanning transmission electron microscopy(STEM),X-ray photoelectron spectroscopy(XPS),X-ray absorption spectroscopy(XAS),Mössbauer spectroscopy,Fourier transform infrared(FT-IR)characterizations,kinetics experiments and density functional theory(DFT)calculations,we revealed the effect of substrate adsorption behavior on AC support surface,that is,with the increase of carboxyl group in OFGs,the adsorbed 3,3',5,5'-tetramethylbenzidine(TMB)molecular increased,and consequently the substrate enriched on AC surface.Such carboxyl group as well as Fe-N_(4) active sites synergistically realized high-efficiency peroxidase-like activity,just like the heme.This work suggests that simultaneously constructing metal single-atom active sites and specific functional groups on carbon support surface may open an avenue for engineering metal-support synergistic catalysis in M_(1)/C SACs,which can further improve catalytic performance.Jianglin Duan Yanan Zhou Yujing Ren Dan Feng Jinlong Shang Huibin Ge Jie Gao Jinlong Yang Yong Qin 2022Nano Research2022,15,7:0
20Auditor Switching by Corporate Governance: Empirical Analysis From the Listed Company in China显示文摘Zhang Yanan Cheng Wen Ren Jinzheng 2013Journal of Modern Accounting and Auditing2013,9,2:0
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