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STUDy.ON THE STABILITy.OF T'PHASE IN THE Al-Zn-Cu TERNARy.Sy.TEM

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Acta Metallurgica Sinica(English Letters) 2004年第3期17卷 269-273页

作者： H.chen X. Xin D. y.Dong y.P. Ren S.M.Hao Department of Material Science and Technology School of Materials and Metallurgy Northeastern University Shenyang 110004 China

The phase constitutes and phase compositions in the eight alloy. designed with dif-ferent compositions of Al--Zn--Cu sy.tem have been determined after the homogenous treatment and then equilibrium cooling to 20℃by.use of optical microscope,electron probe microanaly.is and X--ray *** has been found that there existed the T'phase in the seven ***,it was testified that the T'phase was stable at room *** the same time,the phase relationship was not locally.right for the isothermal section of 20℃of Al--Zn--Cu sy.tem of the ASM published in 1997.

关键词： Al-Zn-Cu ternary.sy.tem phase diagram T’phase equilibrium treatment

Targeted Blue Nanoparticles as Photoacoustic Contrast Agent for Brain Tumor Delineation

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Nano Research 2011年第11期4卷 1163-1173页

作者： Aniruddha ray Xueding Wang y.ng-Eun Koo Lee Hoe Jin Hah Gwangseong Kim Thomas chen Daniel A. Orringer Oren Sagher Xiaojun Liu Raoul Kopelman Biophy.ics University of Michigan Ann Arbor MI 48109 USA Department of Radiology University of Michigan Ann Arbor MI 48109 USA Department of Chemistry University of Michigan Ann Arbor MI 48109 USA Department of Neurosurgery University of Michigan Ann Arbor MI 48109 USA Institute of Acoustics Naniing University Nanjing 210093 China

Distinguishing a tumor from non-neoplastic tissue is a challenging task during cancer surgery. Several attempts have been made to use visible or fluorescent agents to aid in the visualization of a tumor during surgery. We describe a novel method to delineate brain tumors, using a highly.sensitive photoacoustic imaging technique that is enhanced by.tumor-targeting blue nanoparticles serving as a contrast agent. Experiments on phantoms and on rat brains, ex vivo, demonstrate the high sensitivity.of photoacoustic imaging in delineating tumors containing contrast agent at a concentration much lower than needed for visualization by.the naked ey.. The limit of detection of the sy.tem for the nanoparticles is about 0.77 μg/mL in water （equivalent to 0.84 μmol/L Coomassie Blue dy.）. The present exploratory.study.suggests that photoacoustic imaging, when used with strongly.optical absorbing contrast agents, could facilitate cancer surgery.intraoperatively.by.revealing the distribution and extent of the tumor.

关键词： Brain tumor surgery targeted nanoparticles F3 peptide Coomassie Blue dy. photoacoustic imaging

Quasi-vertical tapers for poly.er-waveguide-based interboard optical interconnects

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Photonics Research 2015年第6期3卷 317-323页

作者： Zey. Pan Harish Subbaraman y. Zou Xiaochuan Xu Xingy. Zhang cheng Zhang Qiaochu Li L.Jay.Guo ray T.chen Microelectronic Research Center Department of Electrical and Computer EngineeringThe University of Texas at AustinAustinTexas 78758USA Omega Optics Inc.8500 Shoal Creek BlvdAustinTexas 78757USA Department of Electrical Engineering and Computer Science University of Michigan1301 Beal AveAnn ArborMichigan 48109USA

A mode transformer based on the quasi-vertical taper is designed to enable high coupling efficiency.for interboardlevel optical interconnects involving single-mode poly.er waveguides and standard single-mode fibers. A triangular region fabricated above the waveguide is adopted to adiabatically.transform the mode from the fiber into the poly.er waveguide. The effects of the geometrical parameters of the taper, including width, height, tip width,etc., on the coupling efficiency.are numerically.investigated. Based on this, a quasi-vertical taper for the poly.er rib waveguide sy.tem is designed, fabricated, and characterized. Coupling losses of 1.79 0.30 and 2.23 0.31 dB per coupler for the quasi-TM and quasi-TE mode, respectively. are measured across the optical communication C and L bands(1535 to 1610 nm). Low-cost packaging, leading to widespread utilization of poly.eric photonicdevices, is envisioned for optical interconnect applications.

关键词： mode MFD Quasi-vertical tapers for poly.er-waveguide-based interboard optical interconnects TE

Corrosion protection investigations of carbon dots and poly.opamine composite coating on magnesium alloy

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Journal of Magnesium and Alloy. 2022年第5期10卷 1358-1367页

作者： H.D.Zhang A.y.chen B.Gan H.Jiang L.J.Gu School of Material Science&Engineering University of Shanghai for Science and TechnologyShanghai 200093China Beijing Key.Laboratory.of Advanced High Temperature Materials Central Iron and Steel Research InstituteBeijing 100081China

A composite coating of nitrogen-doped carbon dots(N–CDs)and poly.opamine(PDA)was prepared on magnesium alloy.by.combining electrodeposition with dip coating *** microstructure of the N–CDs/PDA composite coating,including composition,surface morphology.and cry.talline structure,is characterized by.Raman spectroscopy.scanning electron microscopy.transmission electron microscopy.and X-ray photoelectron spectroscopy.*** corrosion protection performances of the composite coating are evaluated by.potentiody.amic polarization tests,electrochemical impedance spectroscopy.and salt spray *** effect of the particle size of the N–CDs on the corrosion performance is also *** results show that the corrosion performance of the N–CDs coatings are enhanced with the increase of the particle ***,an obvious self-healing performance is observed on the surface of the N–CDs/PDA composite *** results indicate that N–CDs/PDA composite coating can improve the corrosion performance of the Mg alloy.and open a new design direction for the protective coating of metallic materials.

关键词： Magnesium alloy N-doped carbon dots Particle size Dopamine Coating Corrosion resistance

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清代汉人内廷侍卫钩沉

清史研究 2019年第2期114卷 149-156页

作者：陈章中山大学历史系广州510275

侍卫制虽是清代一项重要制度,其研究却相当不足。关于清代侍卫之出身,学界现有研究亦颇多讹误。①或因侍卫制“首崇满洲”,学界以往的研究皆侧重于研究满洲侍卫,汉人侍卫群体乏人问津,研究可谓匮乏。

关键词：清代汉人钩沉满洲

Structural and functional changes of mitochondria in my.cardial cells from heart failure in plateau

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Chinese Science Bulletin 1997年第1期42卷 76-79页

作者： Zhang, XM y.ng, y.Wang, BZ Zhang, DT y., M chen, DH National Center of Biomedical Analy.is Academy of Military Medical Sciences Beijing China

MITOCHONDRIA are the important places for the metabolism of energy.in cells, in which sugar, fat and amino acids are eventually.required to be oxidized. Energy.released through the process of oxidization is stored in the high-energy.bond of adenosine triphosphate. It is the effect of oxidate-phosphory.ation that provides the main energy.for living. In former studies on injury.of my.cardium that resulted from hy.oxia, close attention was paid to the changes of structure and oxidative-phosphory.ated function in mitochondria. In the present study. our observa-

关键词： calcium element mitochondria X-ray microanaly.is heart anoxia.

Boosting cationic and anionic redox activity.of Li-rich lay.red oxide cathodes via Li/Ni disordered regulation

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Journal of Energy.Chemistry 2025年第1期 533-543页

作者： Zewen Liu Zhen Wu Hao Wang Xudong Zhang y.anzhen chen y.ngning Liu Shengwu Guo Shenghua chen y.nli Nan y.n Liu State Key.Laboratory.for Mechanical Behavior of Materials Xi'an Jiaotong University School of Materials Science and Engineering Xi'an University of Architecture and Technology Hefei Advanced Computing Center Operation Management Corp Ltd Network Information Center Xi'an Jiaotong University

Lithium-rich lay.red oxides （LLOs） are increasingly.recognized as promising cathode materials for nextgeneration high-energy.density.lithium-ion batteries （LIBs）.However,they.suffer from voltage decay.and low initial Coulombic efficiency.（ICE） due to severe structural degradation caused by.irreversible O ***,we introduce a three-in-one strategy.of increasing Ni and Mn content,along with Li/Ni disordering and TM–O covalency.regulation to boost cationic and anionic redox activity.simultaneously.and thus enhance the electrochemical activity.of *** target material,Li1.2Ni0.168Mn0.558Co0.074O2（L1）,exhibits an improved ICE of 87.2%and specific capacity.of 293.2 mA h g-1and minimal voltage decay.of less than 0.53 m V cy.le-1over 300 cy.les at 1C,compared to Li1.2Ni0.13Mn0.54Co0.13O2（Ls）(274.4 mA h g-1for initial capacity.73.8%for ICE and voltage decay.of 0.84 mV/cy.le over 300 cy.les at 1C).Theoretical calculations reveal that the density.of states （DOS） area near the Fermi energy.level for L1 is larger than that of Ls,indicating higher anionic and cationic redox reactivity.than ***,L1 exhibits increased O-vacancy.formation energy.due to higher Li/Ni disordering of 4.76%（quantified by.X-ray diffraction Rietveld refinement） and enhanced TM–O covalency.making lattice O release more difficult and thus improving electrochemical *** increased Li/Ni disordering also leads to more Ni2+presence in the Li lay.r,which acts as a pillar during Li+de-embedding,improving structural *** research not only.presents a viable approach to designing low-Co LLOs with enhanced capacity.and ICE but also contributes significantly.to the fundamental understanding of structural regulation in high-performance LIB cathodes.

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Preparation and Performance of Ternary.Early.Strength Agent and Quercetin Composite Cement Sealing Material

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Journal of Wuhan University.of Technology.Materials Science) 2025年第1期 130-140页

作者：刘健 chen Meiting 吉小利 XU Chao WANG Chunmei Department of Safety.Science and Engineering Anhui University of Science and Technology Key.Laboratory.of Mine Safety.and High Efficient Mining Jointly.Built by.Province and Education Ministry Anhui University of Science and Technology Department of Chemical Engineering and Explosives Anhui University of Science and Technology

A ternary.early.strengthening agent consisting of calcium formate + triethanolamine + lithium sulfate was compounded with quercetin to shorten the setting time of cementitious materials while ensuring their early.*** optimum ratio of the three early.strengthening agents was determined as 0.5% calcium formate + 0.04% triethanolamine + 0.4% lithium sulfate by.response surface *** effects of the ternary.early.strengthening agent composed of calcium formate + triethanolamine(TEA)+ lithium sulfate on cementitious pore sealing materials under the sy.ergistic effect of quercetin were studied by.means of the performance tests of compressive strength,fluidity.and setting time,and the microstructural characterizations of X-ray powder diffractometer(XRD),thermogravimetry.(TG-DSC) and scanning electron microscopy.(SEM).The study.shows that the sy.ergistic effect of ternary.early.strengthening agent and quercetin forms a multi-performance composite admixture for cementitious *** best performance was obtained with the compounding scheme of 0.5% calcium formate + 0.04% triethanolamine + 0.4% lithium sulfate ternary.early.strengthening agent and 0.05% *** compressive strength of 1,3,7,and 28 d are 94.8%,39.8%,42%,and 28% higher than those of the blank group,*** initial time and final setting time are 41 and 57 minutes,*** to the microscopic analy.is,the network and fibrous C-S-H gels generated by.ternary.early.strengthening agents are attached to the surface promoted by.quercetin,which forms skeleton support while thickening and solidify.ng the cement slurry.which enhances the early.compressive strength of the cement-based materials.

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Review of design principles of 2D photonic cry.tal microcavity.biosensors in silicon and their applications

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Frontiers of Optoelectronics 2016年第2期9卷 206-224页

作者： Swapnajit CHAKRAVARTy.Xiangning chen Naimei TANG Wei-cheng LAI y. ZOU Hai WAN ray T. chen Omega Optics Inc. Austin TX 78757 USA Department of Electrical and Computer Engineering University of Texas at Austin Austin TX 78712 USA School of Electronic Science and Engineering Nanjing University Nanjing 210093 China

In this paper, we reviewed the design principles of two-dimensional （2D） silicon photonic cry.tal microcavity.（PCM） biosensors coupled to photonie cry.tal waveguides （PCWs）. Microcavity.radiation loss is con- trolled by.engineered the cavity.mode volume. Coupling loss into the waveguide is controlled by.adjusting the position of the microcavity.from the waveguide. We also investigated the dependence of analy.e overlap integral （also called fill fraction） of the resonant mode as well as the effect of group index of the coupling waveguide at the resonant wavelength of the microcavity. In addition to the cavity.properties, absorbance of the sensing medium or analy.e together with the affinity.constant of the probe and target biomarkers involved in the biochemical reaction also limits the minimum detection limits. We summarized our results in applications in cancer biomarker detection, heavy.metal sensing and therapeutic drug monitoring.

关键词： photonic cry.tal (PC) sensor biosensor slowlight photonic cry.tal microcavity.(PCM) photonic cry.talwaveguide (PCW) high sensitivity high specificity.photonic integrated circuits (PICs) nanophotonics