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Effects of Stacking Sequence and Impactor Diameter on Impact Damage of Glass Fiber Reinforced Aluminum Alloy Laminate

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Computers, Materials & Continua 2016年第5期52卷 105-121页

作者： Zhengong Zhou shuang tian Jiawei Zhang Center for Composite Materials Harbin Institute of TechnologyHarbinChina Beijing Institute of Mechanical Equipment BeijingP.R.China

The methods of numerical simulation and test are combined to analyze the impact behavior of glass fiber reinforced aluminum alloy laminate(GLARE).A new failure criteria is proposed to obtain the impact failure of GLARE,and combined with material progressive damage method by writing code of *** velocity impact test of GLARE is employed to validate the feasibility of the finite element model *** simulation results have been shown that progressive damage finite element model established is *** the application of the finite element model established,the delamination of GLARE evolution progress is simulated,various failure modes of GLARE during impact are obtained,and the effects of stacking sequence and impactor diameter on the impact damage of GLARE are obtained.

关键词： GLARE Impact behavior Progressive damage Finite element method Impact test

Reactive adsorption of thiophene on Ni/ZnO adsorbent:Effect of ZnO textural structure on the desulfurization activity

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Journal of Natural Gas Chemistry 2010年第3期19卷 327-332页

作者： Jingcheng Zhang Yunqi Liu shuang tian Yongming Chai Chenguang Liu State Key Laboratory of Heavy Oil Processing Key Laboratory of Catalysis CNPC China University of Petroleum Qingdao 266555 Shandong China

To better understand the nature of reactive adsorption of thiophene on Ni/ZnO adsorbent,the effect of ZnO textural structure on the desulfurization activity was *** materials were synthesized by low-temperature solid-state reaction and the corresponding Ni/ZnO adsorbents were prepared by incipient impregnation *** analysis results showed that the crystalline sizes of ZnO as-synthesized as well as the BET surface areas varied obviously with the calcination *** activity evaluations indicated that the Ni/ZnO adsorbents prepared with ZnO possessed a favorable textural structure as active component exhibited good activity of removing *** evolutions of the main crystalline phases of Ni/ZnO adsorbents before and after reaction confirmed that ZnO played a crucial role in taking up S element and converting it into ZnS in the reactive adsorption *** was concluded that ZnO with larger surface area and smaller crystal particles resulted in better desulfurization activity,which may be the main reason for the different activities of the Ni/ZnO adsorbents prepared with ZnO calcined at different temperatures.

关键词： Ni/ZnO reactive adsorption textural structure low-temperature solid-state reaction thiophene

黄芩苷与苦参碱分子间相互作用的量子化学计算与验证

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原子与分子物理学报 2025年第4期42卷 8-14页

作者：董志舒启江田爽王皎侯安国王文苹云南中医药大学中药学院云南省南药可持续利用重点实验室昆明650500

为探究苦参碱能极大增强黄芩苷在水中的溶解度的原因,采用量子计算对二者反应过程及共存状态进行分析,并使用单晶衍射和红外图谱验证计算结果.本研究表明,黄芩苷和苦参碱并非简单的以非共价作用相结合,二者存在质子转移现象,反应生成黄... 详细信息

为探究苦参碱能极大增强黄芩苷在水中的溶解度的原因,采用量子计算对二者反应过程及共存状态进行分析,并使用单晶衍射和红外图谱验证计算结果.本研究表明,黄芩苷和苦参碱并非简单的以非共价作用相结合,二者存在质子转移现象,反应生成黄芩苷阴离子和苦参碱阳离子,以静电作用为主导形成共无定型物,导致水溶性极大增加.

关键词：苦参碱黄芩苷质子转移离子共无定型物

Tin whiskers prefer to grow from the [001] grains in a tin coating on aluminum substrate

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Journal of Materials Science & Technology 2021年第21期80卷 191-202页

作者： shuang tian Yushuang Liu Peigen Zhang Jian Zhou Feng Xue ZhengMing Sun Jiangsu Key Laboratory for Advanced Metallic Materials School of Materials Science and EngineeringSoutheast UniversityNanjing211189China Jiangsu Key Laboratory of Advanced Structural Materials and Application Technology School of Materials Science and EngineeringNanjing Institute of TechnologyNanjing211167China

This work aims at understanding the features of the Sn grains from which whiskers prefe rentially *** growth behavior of Sn whiskers on a 50 μm thick hypereutectic Sn-Al alloy coating was observed in situ by mapping the grain orientations before and after aging using the electron backscatter diffraction(EBSD) *** whiskers were found to grow preferentially from the(001) or near-(001) grains surrounded by the grains having perpendicular orientations,such as(100),(110) and(210).The compre s sive stress in the coating was heterogeneous,and the(001) grains exhibited the higher compressive stress close to the grain *** orientation relationship between α-Al phase and β-Sn phase was confirmed as(200)_(α-A)||(200)_(β-Sn,[011]_(α-A)||[001]_(β-Sn).The plane matching resulted in approximately0.7 % misfit strain in β-Sn,which had little impact on the growth of *** pile-ups were found in the(001) grains and repulsed by the Sn oxide layer,giving the probability of cracking the *** boundaries were found between the whisker and underneath *** dominant diffusion mode for early whisker growth was grain boundary diffusion aided by pipe diffusion.

关键词： Tin whisker Preferred orientation Electron backscatter diffraction Compressive stress Diffusion path

High-resolution vehicle-based adaptive optical system with two-grade tip/tilt correction

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Optoelectronics Letters 2018年第6期14卷 411-416页

作者： MING Ming CHEN Tao XU tian-shuang Changchun Institute of Optics Fine Mechanics and PhysicsChinese Academy of SciencesChangchun 130033China University of Chinese Academy of Sciences Beijing 100049China School of Mechanical and Aerospace Engineering Jilin UniversityChangchun 130012China

The images obtained by a large optical detection system(>500 mm) are always blurred by atmospheric turbulence. To address this blurring, an adaptive optical system is urgently needed. Here, a 1.3 m vehicle-based adaptive optical system(VAOS), located on the Nasmyth focus, is investigated. A two-grade tip/tilt steering mirror is used to eliminate tracking jitter and atmospheric tipping error. Pupil matching and cooperation between the deformable mirror and the wavefront sensor are adopted to achieve high-order aberration measurement and correction via closed-loop correction and to allow the telescope to obtain high-quality imaging. For different seeing conditions and site locations, the VAOS achieves the sensing over the wavelength range from 0.5 μm to 0.7 μm using a Shack-Harmann wavefront sensor and the correction with a 97-unit deformable mirror for an imaging spectrum range from 0.7 μm to 0.9 μm. Moreover, the maximum detection capability of the system is greater than a visual magnitude of 5, and the angular imaging resolution is better than 0.3".

关键词： High-resolution optical system tilt correction

Recent advances and future challenges in the use of nanoparticles for the dispersal of infectious biofilms

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Journal of Materials Science & Technology 2021年第25期84卷 208-218页

作者： shuang tian Henny C.van der Mei Yijin Ren Henk J.Busscher Linqi Shi State Key Laboratory of Medicinal Chemical Biology Key Laboratory of Functional Polymer Materials of Ministry of EducationInstitute of Polymer ChemistryCollege of ChemistryNankai UniversityTianjin300071China University of Groningen and University Medical Center Groningen Department of Biomedical EngineeringAntonius Deusinglaan 19713 AVGroningenthe Netherlands University of Groningen and University Medical Center Groningen Department of OrthodonticsHanzeplein 19700 RBGroningenthe Netherlands

Increasing occurrence of intrinsically antimicrobial-resistant,human pathogens and the protective biofilm-mode in which they grow,dictates a need for the alternative control of infectious *** bacteria utilize dispersal mechanisms to detach parts of a biofilm as part of the biofilm life-cycle during times of nutrient scarcity or *** here identify recent advances and future challenges in the development of dispersants as a new infection-control ***(DNase)and other extracellular enzymes can disrupt the extracellular matrix of a biofilm to cause ***,a variety of small molecules,reactive oxygen species,nitric oxide releasing compounds,peptides and molecules regulating signaling pathways in biofilms have been described as *** their own,dispersants do not inhibit bacterial growth or kill bacterial *** natural,as well as artificial dispersants,are unstable and hydrophobic which necessitate their encapsulation in smart nanocarriers,like p H-responsive micelles,liposomes or *** on their composition,nanoparticles can also possess intrinsic dispersant *** dispersed from an infectious biofilm end up in the blood circulation where they are cleared by host immune ***,this sudden increase in bacterial concentration can also cause *** antibiotic loading of nanoparticles with dispersant properties or combined administration of dispersants and antibiotics can counter this ***,biofilm remaining after dispersant administration appears more susceptible to existing *** part of the natural biofilm life-cycle,no signs of"dispersant-resistance"have been *** are therewith promising for the control of infectious biofilms.

关键词： Dispersant Enzymes EPS eDNA Antibiotic resistance Dispersal mechanism Nanoparticles

High Resolution Multipath Time Delay Estimation Based on FLOCCS-ESPRIT

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Journal of China University of Mining and Technology 2007年第1期17卷 30-34页

作者： LIU Wen-hong QIU tian-shuang HU Ting-ting TANG Hong School of Electronic and Information Engineering Dalian University of Technology Dalian Liaoning 116024 China Department of Physics Hainan Normal University Haikou Hainan 571158 China

The non-Gaussian α-stable distribution is introduced to model impulsive noise. Based on the theory of fractional lower order statistics (FLOS), the fractional lower order cross-covariance (FLOCC) sequence for two received signals is obtained and the fractional lower order cross-covariance spectrum (FLOCCS) can be approached by taking a Fourier transform for the FLOCC sequence. When the FLOCCS is treated as a sequence in the time domain, the problem of multipath time delay estimation (TDE) may be converted into one on multi-frequencies estimation or directions of arrival estimation. Accordingly, the high resolution multipath TDE can be realized with the ESPRIT technology. This idea on multipath TDE is referred to as FLOCCS-ESPRIT in this paper. Computer simulations show that this method has good performance both in a Gaussian noise and in an impulsive noise environment.

关键词： signal processing multipath time delay estimation α-stable distribution FLOCC FLOCCS estimation signal parameter via rotational invariance techniques (ESPRIT)

Adjacent Vertex Distinguishing Incidence Coloring of the Cartesian Product of Some Graphs

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Journal of Mathematical Research and Exposition 2011年第2期31卷 366-370页

作者： Qian WANG shuang Liang tian Department of Mathematics and Computer Science Northwest University for Nationalities Gansu 730030 P. R. China

An adjacent vertex distinguishing incidence coloring of graph G is an incidence coloring of G such that no pair of adjacent vertices meets the same set of *** obtain the adjacent vertex distinguishing incidence chroma... 详细信息

关键词： Cartesian product incidence coloring adjacent vertex distinguishing incidence coloring adjacent vertex distinguishing incidence chromatic number

Synergistic Cu single-atoms and clusters on tubular carbon nitride for efficient photocatalytic performances

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Rare Metals 2024年第11期43卷 5891-5904页

作者： Yu-Xiao Feng Hui-Jun Yu tian-Guang Lu Zi-Ye Zheng shuang tian Li Xiang Shan Zhao Shu-Guang Wang Zuo-Li He Shandong Key Laboratory of Water Pollution Control and Resource Reuse School of Environmental Science and EngineeringShandong UniversityQingdao 266237China Weihai Research Institute of Industrial Technology of Shandong University Shandong UniversityWeihai 264209China School of Electrical Engineering Shandong UniversityJinan 250061China CEDAR Knight Cancer InstituteSchool of MedicineOregon Health and Science UniversityPortland 97201USA

Metal clusters or even single-atoms dispersed and anchored on the photocatalysts'surface can enhance photocatalytic performances on organic pollutant ***,a simple photoreduction method was used to create atomically dispersed metal single-atoms/clusters(MSCs,M=Cu,Pd,Au and Ag)on P-modulated tubular carbon nitride(TCN).The obtained MSCs@TCN demonstrated excellent photocatalytic performances for the degradation of sulfamethazine(SMZ).In particular,the photocatalyst with 2 wt%Cu loading showed ultrahigh SMZ oxidation efficiency(k=0.06110 min^(-1)),almost three times that of TCN(k=0.02066 min^(-1)).It also shows excellent stability in the 5th-cycle *** improved photocatalytic activity of the CuSCs@TCN is ascribed to the synergistic promotion of photogenerated charge separation by Cu single-atoms/clusters as active sites,accelerated charge transfer from bulk TCN to Cu sites through Cu-N_(x)***,the active sites of Cu single-atoms/clusters could promote the production of·O_(2)^(-),which participates in organic oxidation with strong oxidizing holes(h^(+)).This strategy paves a new avenue for designing high-performance photocatalysts decorated with metal single-atoms and clusters.

关键词： Carbon nitride Photocatalysis Cu single-atom Sulfamethazine Degradation