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29篇 您的检索式:作者名="Yanlei Chen"
    题名 作者 年代 出处 被引量
1Mapping wetland changes in China between 1978 and 2008显示文摘Four wetland maps for all China have been produced,based on Landsat and CBERS-02B remote sensing data between 1978 and 2008 (1978,1990,2000 and 2008).These maps were mainly developed by manual interpretation and validated by substantial field investigation in 2009.Based on these maps,we analyzed the 2008 wetland distribution in China and discussed wetland changes and their drivers over the past 30 years.(i) There were about 324097 km 2 of wetlands in 2008,for which inland marshes or swamps were the most common wetland type (35%),with lakes (26%) second.Most of the wetlands were in Heilongjiang,Inner Mongolia,Qinghai and Tibet,occupying about 55% of the national wetland area.(ii) From 1978 to 2008,China's wetland area continually and significantly decreased,by about 33% based on changes in the wetland map.This was in sharp contrast to the increase in artificial wetlands,which increased by about 122%.Inland marshes accounted for the main loss of total wetlands from 1978 to 2000.From 2000 through 2008,riverine and lacustrine wetlands constituted the main wetland loss.Fortunately however,the rate of wetland loss decreased from 5523 to 831 km 2 /a.(iii) The change ratio of lost natural wetlands (including inland and coastal wetlands) to non-wetlands has decreased slightly over the past 30 years.From 1978 to 1990,nearly all natural wetlands (98%) lost were transformed into non-wetlands.However,the ratio declined to 86% from 1990 to 2000,and to 77% from 2000 to 2008.(iv) All Chinese provinces were divided into three groups according to patterns of wetland changes,which could relate to the driving forces of such changes.Tibet was completely different from other provinces,as it was one representative example in which there was a net wetland increase,because of global warming and decreased human activity since 1990.Increased economic development caused considerable wetland loss in most eastern provinces,and artificial wetlands increased.NIU ZhenGuo ZHANG HaiYing WANG XianWei YAO WenBo ZHOU DeMin ZHAO KuiYi ZHAO Hui LI NaNa HUANG HuaBing LI CongCong YANG Jun LIU CaiXia LIU Shuang WANG Lin LI Zhan YANG ZhenZhong QIAO Fei ZHENG YaoMin CHEN YanLei SHENG YongWei GAO XiaoHong ZHU WeiHong WANG WenQing WANG Hong WENG YongLing ZHUANG DaFang LIU JiYuan LUO ZhiCai CHENG Xiao GUO ZiQi GONG Peng 2012Chinese Science Bulletin2012,57,22:51
2Effects of Cr, Ni and Cu on the Corrosion Behavior of Low Carbon Microalloying Steel in a Cl^- Containing Environment显示文摘The effects of Cr, Ni and Cu on the corrosion behavior of low carbon microalloying steel in a Cl containing environment were investigated. The results revealed that the corrosion process could be divided into the initia stage in which the corrosion rate increased with accumulation of corrosion products and the later stage in which homogeneous and compact inner rust layers started to protect steel substrate out of corrosion mediums. The results of X-ray diffraction (XRD) indicated that the rust layers of the three-group steels (Cr Cr-Ni and Cr-Ni-Cu steels) were composed of α-FeOOH,β-FeOOH,γ-FeOOH, Fe3O4 and large amounts o amorphous compounds. The content of amorphous compounds of CreNieCu steel was about 2%-3% more than that of CreNi steel. The results of electron probe microanalysis (EPMA) showed that Cr concentrated mainly in the inner region of the rust of Cr-Ni-Cu steel, inner/outer interface especially, whereas Ni was uniformly distributed all over the rust and Cu was noticed rarely after 73 wet/dry cycles. The addition of C and Ni was beneficial to the formation of dense and compact inner rust layer, which was the most importan reason for the improvement of corrosion resistance of experimental steel.Yanlei Zhou Jun Chen Yang Xu Zhenyu Liu 2013Journal of Materials Science & Technology2013,29,2:29
3Bioinspired micro/nanostructured surfaces prepared by femtosecond laser direct writing for multi-functional applications显示文摘manufacturing of biomimetic micro/nanostructures due to its specific advantages including high precision,simplicity,and compatibility for diverse materials in comparison with other methods(e.g.ion etching,sol-gel process,chemical vapor deposition,template method,and self-assembly).These biomimetic micro/nanostructured surfaces are of significant interest for academic and industrial research due to their wide range of potential applications,including self-cleaning surfaces,oil-water separation,and fog collection.This review presents the inherent relationship between natural organisms,fabrication methods,micro/nanostructures and their potential applications.Thereafter,we throw a list of current fabrication strategies so as to highlight the advantages of FLDW in manufacturing bioinspired microstructured surfaces.Subsequently,we summarize a variety of typical bioinspired designs(e.g.lotus leaf,pitcher plant,rice leaf,butterfly wings,etc)for diverse multifunctional micro/nanostructures through extreme femtosecond laser processing technology.Based on the principle of interfacial chemistry and geometrical optics,we discuss the potential applications of these functional micro/nanostructures and assess the underlying challenges and opportunities in the extreme fabrication of bioinspired micro/nanostructures by FLDW.This review concludes with a follow up and an outlook of femtosecond laser processing in biomimetic domains.Yiyuan Zhang Yunlong Jiao Chuanzong Li Chao Chen Jiawen Li Yanlei Hu Dong Wu Jiaru Chu 2020International Journal of Extreme Manufacturing2020,2,3:9
4基于快速聚类方法的30m分辨率中国土地覆盖遥感制图显示文摘大范围遥感土地覆盖制图通常费时费力.本文采用一种基于特征空间变换的快速聚类方法(CBEST)对覆盖中国的508景Landsat Thematic Mapper(TM)影像进行土地覆盖制图.将中国划分为50个生态分区,每个生态分区内采用CBEST方法对TM影像进行快速聚类,CBEST平均聚类时间约为每2 min一景;通过对自动获得的光谱簇人工土地覆盖类型识别,归并光谱簇,绘制30 m空间分辨率的中国土地覆盖图,统计土地覆盖类型面积,生成主要土地覆盖类型专题图.采用2159个分布全国的验证样本对制图结果进行精度验证,得到总体精度为71.7%,Kappa系数为0.641.与当前两套全球地表覆盖产品(FROM-GLC和GlobCover 2009)的局部对比表明CBEST分类结果在各类型土地覆盖面积统计及视觉效果上存在优势.胡娈运 YanLei CHEN 徐玥 赵圆圆 俞乐 王杰 宫鹏 2014中国科学:地球科学2014,44,8:7
5Quasi-phase-matching-division multiplexing holography in a three-dimensional nonlinear photonic crystal显示文摘Nonlinear holography has recently emerged as a novel tool to reconstruct the encoded information at a new wavelength,which has important applications in optical display and optical encryption.However,this scheme still struggles with low conversion efficiency and ineffective multiplexing.In this work,we demonstrate a quasi-phasematching(QPM)-division multiplexing holography in a three-dimensional(3D)nonlinear photonic crystal(NPC).3D NPC works as a nonlinear hologram,in which multiple images are distributed into different Ewald spheres in reciprocal space.The reciprocal vectors locating in a given Ewald sphere are capable of fulfilling the complete QPM conditions for the high-efficiency reconstruction of the target image at the second-harmonic(SH)wave.One can easily switch the reconstructed SH images by changing the QPM condition.The multiplexing capacity is scalable with the period number of 3D NPC.Our work provides a promising strategy to achieve highly efficient nonlinear multiplexing holography for high-security and high-density storage of optical information.Pengcheng Chen Chaowei Wang Dunzhao Wei Yanlei Hu Xiaoyi Xu Jiawen Li Dong Wu Jianan Ma Shengyun Ji Leran Zhang Liqun Xu Tianxin Wang Chuan Xu Jiaru Chu Shining Zhu Min Xiao Yong Zhang 2021Light(Science & Applications)2021,10,8:5
6A 30 meter land cover mapping of China with an efficient clustering algorithm CBEST显示文摘Remote sensing based land cover mapping at large scale is time consuming when using either supervised or unsupervised classification approaches. This article used a fast clustering method—Clustering by Eigen Space Transformation(CBEST) to produce a land cover map for China. Firstly, 508 Landsat TM scenes were collected and processed. Then, TM images were clustered by combining CBEST and K-means in each pre-defined ecological zone(50 in total for China). Finally, the obtained clusters were visually interpreted as land cover types to complete a land cover map. Accuracy evaluation using 2159 test samples indicates an overall accuracy of 71.7% and a Kappa coefficient of 0.64. Comparisons with two global land cover products(i.e., Finer Resolution Observation and Monitoring of Global Land Cover(FROM-GLC) and GlobCover 2009) also indicate that our land cover result using CBEST is superior in both land cover area estimation and visual effect for different land cover types.HU LuanYun CHEN YanLei XU Yue ZHAO YuanYuan YU Le WANG Jie GONG Peng 2014Science China Earth Sciences2014,57,10:4
7Dynamic Airy imaging through high_efficiency broadband phase microelements by femtosecond laser direct writing显示文摘Manipulating Airy beams to symmetric Airy beams(SABs)with abruptly autofocusing and self accelerating properties has attracted much attention.With such a particular propagation dynamic,SABs may provide great potential in dynamic signal imaging.On the other hand,the generation of SABs by spatial light modulators suffers from the limitations of phase gradient accuracy,low optical efficiency(<40%),and a bulky footprint.Therefore,exploring imaging applications and optimal generation methods of these Airy-type beams deserves further research.Here,based on the coordinate transformation of SAB,an asymmetric Airy beam(AAB)is realized.Symmetric/asymmetric cubic phase microplates(SCPPs/ACPPs)are designed and fabricated for generating SAB/AAB.The SCPP/ACPP demonstrates superior performance:compact construction(60μm × 60μm × 1.1μm),continuous variation of phase,high efficiency(~81%at 532 nm),and broadband operation from 405 to 780 nm.Dynamic imaging under monochromatic and polychromatic lights is realized by the SAB/AAB,indicating various results at different propagation distances with a certain initial signal.Further investigation reveals that the SCPP on a soft substrate maintains its physical dimensions and optical properties unchanged during stretching.Our work enables wide potential applications in integrated optics,beam manipulation,and imaging.ZE CAI XINBO QI DENG PAN SHENGYUN JI JINCHENG NI ZHAOXIN LAO CHEN XIN JIAWEN LI YANLEI HU DONG Wu JIARU CHI 2020Photonics Research2020,8,6:3
8FROM-GC: 30 m global cropland extent derived through multisource data integration显示文摘We report on a global cropland extent product at 30-m spatial resolution developed with two 30-m global land cover maps(i.e.FROM-GLC,Finer Resolution Observation and Monitoring,Global Land Cover;FROM-GLC=agg)and a 250-m cropland probability map.A common land cover validation sample database was used to determine optimal thresholds of cropland probability in different parts of the world to generate a cropland/noncropland mask according to the classification accuracies for cropland samples.A decision tree was then applied to combine two 250-m cropland masks:one existing mask from the literature and the other produced in this study,with the 30-m global land cover map FROM-GLC-agg.For the smallest difference with country-level cropland area in Food and Agriculture Organization Corporate Statistical(FAOSTAT)database,a final global cropland extent map was composited from the FROM-GLC,FROM-GLC-agg,and two masked crop=land layers.From this map FROM-GC(Global Cropland),we estimated the global cropland areas to be 1533.83 million hectares(Mha)in 2010,which is 6.95 Mha(0.45%)less than the area reported by the Food and Agriculture Organization(FAO)of the United Nations for the year 2010.A country-by=country comparison between the map and the FAOSTAT data showed a linear relationship(FROM-GC=1.05*FAOSTAT-1.2(Mha)with R^(2)=0.97).Africa,South America,Southeastern Asia,and Oceania are the regions with large discrepancies with the FAO survey.Le Yu Jie Wang Nicholas Clinton Qinchuan Xin Liheng Zhong Yanlei Chen Peng Gong 2013International Journal of Digital Earth2013,6,6:3
9Surface composition dominates the electrocatalytic reduction of CO2 on ultrafine CuPd nanoalloys显示文摘Preciously tuning the surface composition of noble metal nanoparticles with the particle size of only 2 nm or less by alloying with other metals represents a powerful strategy to boost their electrocatalytic selectivity.However,the synthesis of ultrafine nanoalloys and tuning their surface composition remain challenging.In this report,ultrafine CuPd nanoalloys with the particle size of ca.2 nm are synthesized based on the galvanic replacement reaction between presynthesized Cu nanoparticles and Pd2+precursors,and the tuning of their surface compositions is also achieved by changing the atom ratios of Cu/Pd.For the electrocatalytic reduction of CO2,Cu5Pd5 nanoalloys show the CO Faradaic efficiency(FE)of 88%at−0.87 V,and the corresponding mass activity reaches 56 A/g that is much higher than those of Cu8Pd2 nanoalloys,Cu3Pd7 nanoalloys and most of previously reported catalysts.Density functional theory uncovers that with the increase of Pd on the surface of the ultrafine CuPd nanoalloys,the adsorbed energy of both of intermediate COOH*and CO*to the Pd sites is strengthened.The Cu5Pd5 nanoalloys with the optimal surface composition better balance the adsorption of COOH*and desorption of CO*,achieving the highest selectivity and activity.The difficult liberation of absorbed CO*on the surface of Cu3Pd7 nanoalloys provides carbon source to favor the production of ethylene,endowing the Cu3Pd7 nanoalloys with the highest selectivity for ethylene among these ultrafine CuPd nanoalloys.Dong Chen Yanlei Wang Danye Liu Hui Liu Cheng Qian Hongyan He Jun Yang 2020Carbon Energy2020,2,3:3
10MicroRNA-628-5p Facilitates Enterovirus 71 Infection by Suppressing TRAF3 Signaling显示文摘To date,EV71 infection still poses a great challenge to the health of infants and young children.1 Much established evidence suggests that EV71 infection depends on a wide variety of host factors,including cell surface receptors for EV71 entry,innate immune response,miRNAs,and lncRNAs.2,3 It is thought that diverse signaling pathways are required for EV71 to escape the host immune response.4 Innate immunity serves as the first line of defense against pathogens.Tumor necrosis factor receptor-associated factor(TRAF)proteins are essential components of signaling pathways activated by Toll-like receptor(TLR)or RIG-I-like receptor(RLR)family members.TRAF3 is widely expressed by many cell types,including all nucleated immune cells,in which it plays many roles in the regulation of immune functions.5 TRAF3 plays a significant role in regulating the functions of B and T lymphocytes.TRAF3 is a highly versatile regulator that positively controls type I interferon and cytokine production through interferon regulatory factors(IRFs)and nuclear factor-κB(NF-κB).6 A recent study indicated that EV71-induced ubiquitin-specific protease 19(USP19)negatively regulates type I IFN signaling by targeting TRAF3.Dong Li Shuaiyin Chen Weiguo Zhang Chao Zhang Tiantian Sun Yue Du Ronghua Ding Yanlei Gao Yuefei Jin Guangcai Duan 2021Cellular & Molecular Immunology2021,18,5:2
11Effects of processing parameters and addition of flame-retardant into moulding sand on the microstructure and fluidity of sand-cast magnesium alloy Mg-10Gd-3Y-0.5Zr显示文摘In this study, the effects of processing parameters(such as pouring temperature and mould pre-heating temperature) and flame-retardant content on the microstructure and fluidity of sand-cast magnesium(Mg) alloy Mg-10Gd-3Y-0.5Zr(GW103K) were systematically investigated. It was found that the increase of pouring temperature leads to coarsened microstructure and decreased fluidity of sand-cast GW103 K alloy. Increase of mould pre-heating temperature incurs coarsening of as-cast microstructure and increase of fluidity. The addition of flame-retardant into moulding sand has a negligible influence on the microstructure of sand-cast GW103 K alloy. With the increase in flame-retardant content,fluidity of the alloy initially increases and then decreases. The optimized process parameters and flameretardant addition were obtained to be pouring temperature of 750?C, mould temperature of 110?C, and flame-retardant addition of 1%. The fire retardant mechanism of moulding sand was determined.Yanlei Li Guohua Wu Antao Chen Wencai Liu Yingxin Wang Liang Zhang 2017Journal of Materials Science & Technology2017,33,6:2
12Ursolic acid derivative FZU-03,010 inhibits STAT3 and induces cell cycle arrest and apoptosis in renal and breast cancer cells显示文摘Wei Li Hongxiu Zhang Mingxiu Nie Yanlei Tian Xu Chen Ceshi Chen Haijun Chen Rong Liu 2017Acta Biochimica et Biophysica Sinica2017,49,4:2
13Direct Synthesis,Characterization and Catalytic Activity of Titanium-Substituted SBA-15 Mesoporous Molecular Sieves显示文摘CHEN Yangying HUANG Yanlei XIU Jinghai 2004Applied Catalysis A:General2004,273,:1
14GLUT3 induced by AMPK/CREB1 axis is key for withstanding energy stress and augments the efficacy of current colorectal cancer therapies显示文摘Cancer cells are usually characterized by hyperactive glucose metabolism,which can often lead to glucose scarcity;thus,alternative pathways to rewire cancer metabolism are required.Here,we demonstrated that GLUT3 was highly expressed in colorectal cancer(CRC)and negatively linked to CRC patient outcomes,whereas GLUT1 was not associated with CRC prognosis.Under glucoselimiting conditions,GLUT3 expedited CRC cell growth by accelerating glucose input and fuelling nucleotide synthesis.Notably,GLUT3 had a greater impact on cell growth than GLUT1 under glucose-limiting stress.Mechanistically,low-glucose stress dramatically upregulated GLUT3 via the AMPK/CREB1 pathway.Furthermore,high GLUT3 expression remarkably increased the sensitivity of CRC cells to treatment with vitamin C and vitamin C-containing regimens.Together,the results of this study highlight the importance of the AMPK/CREB1/GLUT3 pathway for CRC cells to withstand glucose-limiting stress and underscore the therapeutic potential of vitamin C in CRC with high GLUT3 expression.Weixing Dai Ye Xu Shaobo Mo Qingguo Li Jun Yu Renjie Wang Yanlei Ma Yan Ni Wenqiang Xiang Lingyu Han Long Zhang Sanjun Cai Jun Qin Wen-Lian Chen Wei Jia Guoxiang Cai 2020Signal Transduction and Targeted Therapy2020,5,1:1
15Separation of oil/water emulsion using Pluronic F127 modified polyethersulfone ultrafiltration membranes显示文摘Wenjuan Chen Jinming Peng Yanlei Su Lili Zheng Lijun Wang Zhongyi Jiang 2009Separation and Purification Technology2009,,3:1
16Separation of Oil/Water Emulsion Using Pluronic F127 Modified Polyethersul- fone Ultrafiltration Membranes显示文摘Chen Wenjuan Peng Jinming Su Yanlei 2009Sep Purif Technol2009,66,3:1
17The Improved Oil/ Water Separation Performance of Cellulose Acetate-Graft-Polyac- rylonitrile Membranes显示文摘Chen Wenjuan Su Yanlei Zheng Lili 2009J Membr Sci2009,337,12:1
18Separation of Oil/Water Emulsion Using Pluronic F127 Modified Polyether sulfone Ultraf: ltration membranes 显示文摘Wenjuan Chen Jinming Peng Yanlei Su 2009Separation and Purification Technology2009,,66:1
19显示文摘Chen Wenjuan Peng Jinming Su Yanlei 2009Separation and Puri? cation Technology2009,66,3:1
20Overexpression of miR-21 in patients with ulcerative colitis impairs intestinal epithelial barrier function through targeting the Rho GTPase RhoB显示文摘Yongzhi Yang Yanlei Ma Chenzhang Shi Hongqi Chen Huizhen Zhang Niwei Chen Peng Zhang Feng Wang Jun Yang Jianjun Yang Qingchao Zhu Yong Liang Wen Wu Renyuan Gao Zhe Yang Yang Zou Huanlong Qin 2013Biochemical and Biophysical Research Communications2013,,4:1
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