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24篇 您的检索式:作者名="Li Yejun"
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1Review on monolayer CBN superabrasive wheels for grinding metallic materials显示文摘A state-of-the-art review on monolayer electroplated and brazed cubic boron nitride(CBN) superabrasive wheels for grinding metallic materials has been provided in this article. The fabrication techniques and mechanisms of the monolayer CBN wheels are discussed. Grain distribution, wheel dressing, wear behavior, and wheel performance are analyzed in detail. Sample applications of monolayer CBN wheel for grinding steels, titanium alloys, and nickel-based superalloys are also provided. Finally, this article highlights opportunities for further investigation of monolayer CBN grinding wheels.Ding Wenfeng Barbara Linke Zhu Yejun Li Zheng Fu Yucan Su Honghua Xu Jiuhua 2017Chinese Journal of Aeronautics2017,30,1:24
2MoSe2 porous microspheres comprising monolayer flakes with high electrocatalytic activity显示文摘综合的一条灵巧的胶体的线路 MoSe < 潜水艇 class= “ a-plus-plus ” > 2 有由 MoSe 组成的 400600 nm 的直径的多孔的 microspheres < 潜水艇 class= “ a-plus-plus ” > 2 个 单层薄片在厚度的 0.7 nm 被报导。溶剂 trioctylamine TOA 和 oleylamine 操作维护管理被发现在 MoSe 的形成起重要作用 < 潜水艇 class= “ a-plus-plus ” > 2 microspheres, TOA 由此决定三维的 3D microspherical 形态学和操作维护管理,指导 MoSe 的形成 < 潜水艇 class= “ a-plus-plus ” > 2 个 单层薄片。柔韧的 3D MoSe <潜水艇class=“ a-plus-plus ”> 2 microspheres 展览为 electrocatalytic 氢进化反应的显著活动和耐久性她在酸,维持 77 mV 的小发作过电位并且为 5 妈/厘米的当前的密度保留 100 mV 的小过电位<啜class=“ a-plus-plus ”>在 1,000 以后的 2 骑车。另外,类似的 3D WSe < 潜水艇 class= “ a-plus-plus ” > 2 microspheres 能被使用这个方法也准备。我们期望这条灵巧的胶体的线路能进一步被扩展综合将在域例如里发现应用的另外的多孔的结构在精力存储,催化作用,并且察觉到。Yejun Zhang Qiufang Gong Lun Li Hongchao Yang Yanguang Li Qiangbin Wang 2015Nano Research2015,8,4:9
3Real-time in vivo visualization of tumor therapy by a near-infrared-II Ag2S quantum dot-based theranostic nanoplatform显示文摘治疗学的功效的实时、客观的反馈将具有为肿瘤处理的大价值。这里,我们报导聪明的 Ag <潜水艇class=“ a-plus-plus ”> 2 S 基于QD 的 theranostic nanoplatform ( DOX@PEG-Ag <潜水艇class=“ a-plus-plus ”> 2 S )由把反癌症药 doxorubicin (纪录影片)装进聚乙烯获得了乙二醇涂的银硫化物量点( PEG-Ag <潜水艇class=“ a-plus-plus “> 2 S QD )通过恐水病恐水病的相互作用,展出了装载能力的高药,到 Ag 的纪录影片的 93 wt.%<潜水艇class=” a-plus-plus “> 2 S QD ),在血的长循环( t <潜水艇class=” a-plus-plus “在指向肿瘤组织以后,从 PEG-Ag 的纪录影片 < 潜水艇 class= “ a-plus-plus ” > 2 S 货物有选择地并且很快被释放进癌症房间,产生重要肿瘤抑制。由于深织物穿入和 Ag 的高时间空间的分辨率<潜水艇class=“ a-plus-plus ”> 2 在第二扇在红外线附近的窗户( NIR-II )中的 S QD 荧光, DOX@PEG-Ag <潜水艇class=“ a-plus-plus ”> 2 在了解指向过程和治疗学的功效的药的 vivo 即时的启用的 S 。我们期望那如此的新奇 theranostic nanoplatform, DOX@PEG-Ag < 潜水艇 class= “ a-plus-plus ” > 2 与综合的药交货,治疗和评价功能, S 将为肿瘤的个性化的治疗是高度有用的。Feng Hu Chunyan Li Yejun Zhang Mao Wang Dongming Wu Qiangbin Wang 2015Nano Research2015,8,5:4
4Secure Network Coding Against the Contamination and Eavesdropping Adversaries显示文摘ZHOU Yejun LI Hui MA Jianfeng 2009Chinese Journal of Electronics2009,18,3:3
5Generation of Hot Electron With Higher Temperature From Femtosecond Laser-solid Plasma显示文摘Tao Yezheng Li Yejun Shan Yusheng 2002Chinese Physics Letter2002,19,7:1
6Generation of Hot Electron With Higher Temperature From Femtosecond Laser-solid Plasma 显示文摘Tao Yezheng Li Yejun Shan Yusheng 2002Chinese Physics Letter2002,19,7:1
7Effect of ZnO additives and acid treatment on catalytic performance of Pt/WO3/ ZrO2 for n-C7 hydroisomerization显示文摘Yan Liu Yejun Guan Can Li 2006Journal of Catalysis2006,244,1:1
8X-ray lens of monolithic polycapillaries for macromolecular crystallography显示文摘He Yejun Chen Jun Li Yude 1998Journal of X-ray Science and Technology1998,8,:1
9Connection availability based protection algorithm in wireless-optical broadband access network显示文摘The hybrid Wireless-Optical Broadband Access Network(WOBAN)provides a new and promising architecture for broadband access network by combining the beneficial properties of wireless and optical access technologies.To avoid huge data loss,WOBAN needs to be designed with a high availability guarantee.The purpose of this paper is to protect the Passive Optical Network at the back-end using the backup radios in Wireless Mesh Network at the front-end.The proposed protection scheme is based on a connection availability model.First,we assigned several backup Optical Network Units(ONUs)for each primary ONU not satisfying the availability requirement of primary optical connection.Under the availability requirement of backup optical connection,each backup ONU needed to reserve the residual capacity as the backup capacity to fully protect the traffic demand of its primary ONU.Then,we selectively deployed the additional radio interfaces as the backup radios for the wireless routers in the front-end under the availability requirement of backup wireless connection,in order to establish the wireless-backup-path between each pair of primary and backup ONUs.Each backup radio on the wireless-backup-path will retain the backup radio capacity for rerouting traffic,so as to decrease the possibility of traffic block in case of failure.We aimed to design efficient heuristic algorithms and yield suboptimal solutions for minimizing the consumption of backup ONU capacity and the cost of backup radios.Simulation results demonstrate the advantage of the proposed scheme compared to previous works.LIU YeJun GUO Lei YU YinPeng LI Bing XIANG Peng DAI CuiQin 2014Science China(Information Sciences)2014,57,4:1
10Water-stable Mn-based MOF nanosheet as robust visible-light-responsive photocatalyst in aqueous solution显示文摘Development of visible-light-responsive metal-organic frameworks(MOFs) for promising solar energy conversion has inspired continuous interest, but it still suffers from poor stability especially in aqueous solution and/or under photoirradiation due to their relatively labile coordination bonds. Herein, a new synthesized layered Mn-based MOF(Mn-TBAPy-BK) and its exfoliated twodemensional nanosheets(Mn-TBAPy-NS) are revealed to be highly stable no matter in aqueous solution with wide p H region or under visible light irradiation. As expected, the exfoliated Mn-TBAPy-NS exhibits enhanced surface area, shortened charge transfer distance, and superior charge separation with respect to the bulk one. Moreover, the as-obtained nanosheets can be employed as effective building block for nanocomposite and heterostructure assembly to further promote charge separation as well as solar hydrogen production from aqueous solution under visible light. The finding of water stable MOF nanosheet under visible light demonstrates its promising future for solar energy conversion.Yejun Xiao Xiangyang Guo Tongtong Yang Junxue Liu Xuan Liu Yu Xiao Lifang Liu Taifeng Liu Sheng Ye Jun Jiang Fuxiang Zhang Can Li 2020Science China Chemistry2020,63,12:1
11Hybrid co-based MOF nanoboxes/CNFs interlayer as microreactors for polysulfides-trapping in lithium-sulfur batteries显示文摘Lithium-sulfur battery is desirable for the future potential electrochemical energy storage device with advantages of high theoretical energy density,low cost and environmental friendliness.However,some natural hindrances,particularly fast capacity degradation resulting from the migration of dissolved polysulfide intermediates,remain to be significant challenges prior to the practical applications.In this work,a composite interlayer of carbon nanofibers(CNFs)which are enriched by Co-based metal organic frameworks(ZIF-67)growth in-situ is exploited.Notably,physical blocking and chemical trapping abilities are obtained synergistically from the ZIF/CNFs interlayer,which enables to restrain the dissolution of polysulfides and alleviate shuttle effect.Moreover,the three-dimensional fiber networks provide an interconnected conductive framework between each ZIF microreactor to promote fast electron transfer during cycling,thus contributing to excellent rate and cycling performance.As a result,Li-S cells with ZIF/CNFs interlayer show a high specific capacity of 1334 mAh g^(-1) at 1 C with an excellent cycling stability over 300 cycles.Besides,this scalable and affordable electrospinning fabrication method provides a promising approach for the design of MOFs-derived carbon materials for high performance Li-S batteries.Jing Li Caiming Jiao Jinghui Zhu Liubiao Zhong Tuo Kang Sehrish Aslam Jianyong Wang Sanfei Zhao Yejun Qiu 2021Journal of Energy Chemistry2021,30,6:1
12Monitoring NAD(H) and NADP(H) dynamics during organismal development with genetically encoded fluorescent biosensors显示文摘Cell metabolism plays vital roles in organismal development,but it has been much less studied than transcriptional and epigenetic control of developmental programs.The difficulty might be largely attributed to the lack of in situ metabolite assays.Genetically encoded fluorescent sensors are powerful tools for noninvasive metabolic monitoring in living cells and in vivo by highly spatiotemporal visualization.Among all living organisms,the NAD(H)and NADP(H)pools are essential for maintaining redox homeostasis and for modulating cellular metabolism.Here,we introduce NAD(H)and NADP(H)biosensors,present example assays in developing organisms,and describe promising prospects for how sensors contribute to developmental biology research.Ting Li Yejun Zou Shuning Liu Yi Yang Zhuo Zhang Yuzheng Zhao 2022Cell Regeneration2022,11,1:0
13Elucidating the evolution of long-period stacking ordered phase and its effect on deformation behavior in the as-cast Mg-6Gd-1Zn-0.6Zr alloy显示文摘Herein,the evolution of long-period stacking ordered(LPSO)phases in the as-cast Mg-6Gd-1Zn-0.6Zr(wt.%)alloy are investigated via transmission electron microscopy(TEM)and atom probe tomography(APT).The TEM results reveal that two types of LPSO phase(a bulky interdendritic phase and a plate-like matrix LPSO phase)are formed in the as-cast sample.Most of the LPSO phases are confirmed to be of the 14H type,with a smaller proportion being of the 18R LPSO.Further,the APT results reveal that the composition of the interdendritic LPSO phase is closer to that of the ideal 14H phase compared to the matrix LPSO phase,and both the interdendritic and matrix LPSO phases exhibit a Gd/Zn ratio of 2.5,thereby indicating a deficient Zn content compared to the ideal 14H phase(i.e.,1.3).In addition,the influence of the LPSO phases on the deformation behavior is investigated at different compressive plastic strains using electron backscatter diffraction(EBSD)analysis to reveal twinning and slip behavior during deformation.The results indicate that the LPSO phase induces additional work hardening in the late stage of deformation via the suppression of{1011}compressive twinning and the activation of non-basal slip systems.Sangwon Lee Yejun Park Jongbin Go Young Mok Kim Seok Su Sohn Jiehua Li Pyuck-Pa Choi 2023Journal of Magnesium and Alloys2023,11,8:0
14Glutathione-capped quantum dots for plasma membrane labeling and membrane potential imaging显示文摘The plasma membrane of cells is a crucial biological membrane that involved in a variety of cellular processes including cell signaling transduction through membrane electrical activity.Recently,monitoring membrane electrical activity using fluorescence imaging has attracted numerous attentions for its potential applications in evaluating how the nervous system works.However,the development of ideal fluorescent voltage-sensitive probes with both high membrane labeling efficiency and voltage sensitivity is still retain a big challenge.Herein,glutathionecapped CdSe@ZnS quantum dots (CdSe@ZnS-GSH QDs) with a size of 2.5 nm and an emission peak at 520 nm are synthesized using a facile ligand exchange method for plasma membrane labeling and membrane potential imaging.The as-synthesized CdSe@ZnS-GSH QDs can effectively label cell membrane at neutral pH within 30 min and exhibit excellent optical stability in continuous imaging for up to 60 min.With the test concentration up to 200 nM,CdSe@ZnS-GSH QDs show high biocompatibility to cells and do not affect cell proliferation,disturb cell membrane integrity or cause apoptosis and necrosis of cells.Then,a two-component voltage sensor strategy based on fluorescence resonance energy transfer (FRET) between CdSe@ZnS-GSH QDs and the dipicrylamine (DPA) is successfully developed to monitor the membrane potential by the fluorescence of CdSe@ZnS-GSH QDs.This study offers a facile strategy for labeling plasma membrane and monitoring the membrane potential of cells and will hold great potential in the research of signaling within intact neuronal circuits.Guangcun Chen Yejun Zhang Zhao Peng Dehua Huang Chunyan Li Qiangbin Wang 2019Nano Research2019,12,6:0
15Epitaxial growth of single-crystalline Ni_(46)Co_4Mn_(37)In_(13) thin film and investigation of its magnetoresistance显示文摘Single-crystalline thin film of Ni46Co4Mn37In13alloy grown on MgO(0 0 1) was prepared by Pulsed Laser Deposition(PLD) method. The epitaxial growth process was monitored by in situ Reflection High Energy Electron Diffraction(RHEED). Structure measurements reveal that the single-crystalline Ni46Co4Mn37In13film could be stabilized on MgO(0 0 1) as a face-centered-cubic(fcc) structure. From the evolution of RHEED,it can be deduced from the patterns that Volmer-Weber growth mechanism(3-D) dominates at the initial stage. Then,it becomes layerby-layer growth mechanism(2-D) with the increase of the film thickness. Lastly,growth mechanism converts back to 3-D when the film is thick enough. Both electrical resistance and magnetoresistance(MR) were measured at various temperatures using Physical Property Measurement System(PPMS). The electrical resistance measurement indicates that the film sample does not have martensitic transformation in the measurement temperature range. However,with the temperature increasing,the film sample exhibits a transition from metallic to semiconductorlike properties. Moreover,a small negative magnetoresistance was observed at different temperature,which can be explained by the spindependent scattering of the conduction electrons.Chao Jing Yejun Yang Xiaolong Wang Pan Liao Dong Zheng Baojuan Kang Shixun Cao Jincang Zhang Jie Zhu Zhe Li 2014Progress in Natural Science:Materials International2014,24,1:0
16Solvent-stabilized few-layer violet phosphorus and its ultrafast nonlinear optics显示文摘Featured with high thermal decomposition temperature and layered structure,violet phosphorus(VP)offers an unparalleled stable allotrope of phosphorus to demonstrate the optoelectronic device and photonics elements with high performance at the nanoscale.Here,we report few-layer and hundreds of nanometer-sized VP with robust stability in different solvents and ambient conditions by ultrasound-assisted liquid phase exfoliation approach.For the first time,the ultrafast carrier dynamics and thirdorder nonlinear optical response of VP were investigated.Sub-picosecond timescale ultrafast carrier dynamic and ultrafast nonlinear saturable absorption of VP were demonstrated.Our findings demonstrated that VP possessed a promising potential for use in ultrafast nonlinear photonic applications such as saturable absorbers and optical switches.Li Zhou Jianlong Kang Yulan Dong Yiduo Wang Yejun Li Han Huang Si Xiao Yingwei Wang Jun He 2023Nano Research2023,16,4:0
17Research on the Characteristics of the Coda Q Value in the Jiangsu Area显示文摘In this paper,research is conducted on the characteristics of coda Q values of the Jiangsu area,based on the Aki single backscattering model with the waveforms recorded by the Jiangsu digital seismic network. The results show that the Jiangsu area is a high Q value area as a whole,but the Q value differs obviously between different regions,characterized generally as high in the south and low in the north. This study focuses on 4 sub-regions where the stations are relatively dense,the tectonic features are distinguishing,and the calculation results of coda Q0 are fairly concentrated,and obtains the characteristic relationship between the Q value and frequency of the 4 regions. The region from south Jiangsu to the Yangtze River estuary and that around the Maoshan fault zone are the high Q value areas in Jiangsu; the region from central Jiangsu to the waterfront area is the low Q value area in Jiangsu Province,and the Lianyungang region in northern Jiangsu is the moderate Q value area. Comparing the tectonic activity and seismicity of the 4 different Q value sub-regions,there is a certain correlation between Q value,crustal movement and seismicity.Sun Yejun Huang Yun Wang Bin Wang Jun Li Feng Jiang Haolin 2014Earthquake Research in China2014,28,2:0
18代谢成像揭示白血病起始细胞归巢于骨内膜微环境并有效对称分裂的独特偏好显示文摘文章简介白血病起始细胞(leukemia-initiatingcells,LICs)在不同骨髓微环境中的代谢特征及其与细胞命运决定的关系尚不清楚。研究团队利用遗传编码的高度灵敏的NADH/NAD+代谢感受器(So Nar)标记和指示小鼠和患者白血病细胞代谢状态,构建了实时在体代谢成像体系,并阐明了白血病细胞中存在明显的代谢异质性。Xiaoxin Hao Hao Gu Chiqi Chen Dan Huang Yuzheng Zhao Li Xie Yejun Zou Hui Sophie Shu Yaping Zhang Xiaoxiao He Xiaoyun Lai Xiaocui Zhang Bo OZhou Cheng Cheng Zhang Guo-Qiang Chen 于卓 杨弋 郑俊克 2020科学新闻2020,,2:0
19A Cascade Targeted and Activatable NIR-ⅡNanoprobe for Highly Sensitive Detection of Acute Myeloid Leukemia in an Orthotopic Model显示文摘Acute myeloid leukemia(AML)remains a significant concern in modern medicine.Early diagnosis is the key to improving the therapeutic effects of AML.In the present work,a cascade-targeted and activatable NIR-Ⅱ nanoprobe(Ald&A1094@Ag_(2)S)was developed for early detection of AML in an orthotopic model.Upon intravenous injection,Ald&A1094@Ag_(2)S effectively accumulated in bone tissue due to its high affinity for alendronate(Ald)to the bone.Thereafter,the AML microenvironment allowed for the membrane-penetrating peptide TAT(cell‐penetrating peptide(CGRRRQRRKKRG))to be exposed via pH-sensitive hydrazone bond-mediated detaching of bone-targeted ligands,resulting in efficient internalization of nanoprobes in HL60 cells.Endogenous peroxynitrite(ONOO–)in HL60 cells further activated NIR-Ⅱ fluorescence of Ag_(2)S QDs via A1094 oxidation,thereby inhibiting fluorescence resonance energy transfer(FRET).Such a unique cascade-targeted and activatable strategy enables the nanoprobes to only light up the AML lesion region in the bone marrow with negligible background effects,which holds great potential for clinical applications in the future.Xiaohu Yang Xinyi An Sisi Ling Haoying Huang Yejun Zhang Guangcun Chen Chunyan Li &Qiangbin Wang 2021CCS Chemistry2021,3,3:0
20AgAuSe quantum dots with absolute photoluminescence quantum yield of 87.2%:The effect of capping ligand chain length显示文摘Surface ligands of colloidal quantum dots(QDs)have a profound influence on their surface states,which has been verified in the studies of the effect of ligand head groups on the photoluminescence(PL)properties of QDs.However,the investigation of the ligand chain length is limited.Here,we systematically explored the effect of chain length on the Ag_(2)Se QDs by selecting three ligands,1-octanethiol(OTT),1-dodecanethiol(DDT),and 1-hexadecanethiol(HDT),with diverse chain lengths.We found that the PL intensity of Ag_(2)Se QDs increased with the decrease of the ligand chain length due to the enhanced passivation of surface defects emerging from the robust QD-ligand interface binding affinity and the weaker hydrophobic chain–chain interaction.Subsequently,AgAuSe QDs terminated with OTT were obtained by alloying parent OTT-Ag_(2)Se QDs with Au precursor with a record absolute PL quantum yield(PLQY)of 87.2%at 970 nm,facilitating ultrasensitive in vivo angiography imaging in a nude mouse model.We expect that our finding of the important role of the ligand chain length on the optical properties of QDs will be suggestive to the design and synthesis of high-quality QDs,and also look forward to the clinical applications of the ultra-bright AgAuSe QDs.Ziqiang Sun Cheng Liu Hongchao Yang Xiaohu Yang Yejun Zhang Hongzhen Lin Youyong Li Qiangbin Wang 2022Nano Research2022,15,9:0
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