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Applied Mathematics and Mechanics(English Edition) 2023年第9期44卷 1457-1486页

作者： qiao zhang Yuxin SUN National Key Laboratory of Strength and Structural Integrity School of Aeronautic Science and EngineeringBeihang UniversityBeijing 100191China

This paper proposes a three-dimensional(3D)Maltese cross metamaterial with negative Poisson’s ratio(NPR)and negative thermal expansion(NTE)adopted as the core layers in sandwich plates,and aims to explore the relations between the mechanical responses of sandwich composites and the NPR or NTE of the ***,the NPR and NTE of the metamaterial are derived analytically based on energy *** effective elastic modulus and mass density of the 3D metamaterial are obtained and validated by the finite element method(FEM).Subsequently,the general governing equation of the 3D sandwich plate under thermal environments is established based on Hamilton’s principle with the consideration of the von Kármán *** differential quadrature(DQ)FEM(DQFEM)is utilized to obtain the numerical *** is shown that NPR and NTE can enhance the global stiffness of sandwich *** geometric parameters of the Maltese cross metamaterial significantly affect the responses of the thermal stress,natural frequency,and critical buckling load.

关键词： negative Poisson's ratio(NPR) negative thermal expansion(NTE) sand-wich plate vibration buckling

Elastoplastic pipe-soil interaction analyses of partially-supported jointed water mains

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2008年第11期9卷 1497-1506页

作者： Yu SHAO Tu-qiao zhang Department of Civil Engineering Zhejiang University Hangzhou 310027 China

Water distribution networks are essential components of water supply systems. The combination of pipe structural deterioration and mechanics leads to the failure of pipelines. A physical model for estimating the pipe failure must include both the pipe deterioration model and mechanics model. Winkler pipe-soil interaction (WPSI), an analytical mechanics model developed by Rajani and Tesfamariam (2004), takes external and internal loads, temperature changes, loss of bedding support, and the elastoplastic effect of soil into consideration. Based on the WPSI model, a method to evaluate the elastic and plastic areas was proposed in the present study. An FEM model based on pipe-soil interaction (PSI) element was used to verify the analytical model. Sensitivity analyses indicate that the soft soil, long pipe and high temperature induced the axial plastic deformation more likely, which, however, may not occur in normal scenarios. The soft soil, pipes in small diameters, long unsupported bedding are prone to form flexural plastic area. The results show that the pipes subjected to the same loads have smaller stresses in the elastoplastic analysis than elastic analysis. The difference, however, is slight.

关键词： Elastoplastic soil Winkler pipe-soil interaction (WPSI) Jointed water mains

First measurement of strong interaction between antiprotons

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National Science Review 2016年第2期3卷 154-155页

作者： Huan-qiao zhang China Institute of Atomic Energy

Our world is made of matter,but matter has a counterpart called antimatter,in which the subatomic particles(protons and electrons)of antimatter have charges opposite to those of ordinary *** an ordinary matter,the protons are positively charged,and the electrons carry negative *** antimatter,the antiprotons are negatively charged,while the antielectrons(called positrons)are positively *** antimatter and matter ever meet,they annihilate in a flash of light.

关键词： First measurement of strong interaction between antiprotons

Comparison of growth and lipid accumulation properties of two oleaginous microalgae under different nutrient conditions

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Frontiers of Environmental Science & Engineering 2014年第5期8卷 703-709页

作者： qiao zhang Yu HONG College of Environmental Science and Engineering Beijing Forestry University Beijing 100083 China

This study compared the growth and lipid accumulation properties of two oleaginous microalgae, namely, Scenedesmus sp. LX1 and Chlorella sp. HQ, under different nutrient conditions. Both algal species obtained the highest biomass, lipid content and lipid yield under low-nutrient conditions （mBGll medium）. The biomass, lipid content and lipid yield of Scenedesmus sp. LX1 were 0.42g·L^-1, 22.5% and 93.8mg·L^-1, respectively. These values were relatively higher than those of Chlorella sp. HQ （0.30g·L^-1, 17.1% and 51.3mg·L^-1, respectively）. These algae were then cultivated in an SE medium that contained more nutrients; as a result, the biomass and lipid yield of Scenedesmus sp. LX1 reduced more significantly than those of Chlorella sp. HQ. Opposite results were observed in lipid and triacylglycerols （TAGs） contents. The cell sizes of both algal species under low-nutrient conditions were larger than those under high-nutrient conditions. Chlorella sp. HQ cells did not aggregate, but Scenedesmus sp. LX1 cells flocculated easily, particularly under low-nutrient conditions. In summary, low-nutrient conditions favour the growth and lipid production of both algae, but Scenedesmus sp. LX1 outperforms Chlorella sp. HQ.

关键词： Scenedesmus sp. LX1 Chlorella sp. HQ,growth rate algal biomass lipid accumulation triacylgly-cerols (TAGs)

Metal-organic framework assisted synthesis of single-atom catalysts for energy applications

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National Science Review 2018年第5期5卷 626-627页

作者： Yao Zheng Shi-zhang qiao School of Chemical Engineering The University of Adelaide School of Materials Science and Engineering Tianjin University

Metal single-atom catalysts (M-SACs)are emerging as a new research frontier because of their low-coordination metal atoms and uniform structures. As a representation of maximum atom utilization efficiency, M-SACs demonstrate unique properties in a wide variety of heterogeneous catalysis and electrocatalytic processes [1,2]. Metal-organic frameworks (MOFs) are composed of metal-

关键词： Co Metal-organic framework assisted synthesis of single-atom catalysts for energy applications ZIF Ni

High-voltage aqueous zinc-ion batteries with conversion-type anode and modified electrolyte

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National Science Review 2024年第8期11卷 50-51页

作者： Junnan Hao Shi-zhang qiao School of Chemical Engineering The University of Adelaide

Aqueous zinc-ion batteries (AZIBs) with near-neutral electrolytes have attracted wide attention for their high safety, low cost and environmental friendliness,making them a promising candidate for sustainable energy storage. However, the development of high-voltage AZIBs has been hindered by the limited choice of anode materials and the interfacial incompatibility between the electrode and the electrolyte [1].

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Formation of disinfection byproducts from accumulated soluble products of oleaginous microalga after chlorination

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Frontiers of Environmental Science & Engineering 2017年第6期11卷 1-7页

作者： Yu Liu qiao zhang Yu Hong Beijing Key Laboratory for Source Control Technology of Water Pollution Beijing Forestry University Beijing 100083 China

When microalgae are simultaneously applied for wastewater treatment and lipid production, soluble algal products （SAP） should be paid much attention, as they are important precursors for formation of disinfection byproducts （DBPs）, which have potential risks for human health. Chlorella sp. HQ is an oleaginous microalga that can generate SAP during growth, especially in the exponential phase. This study investigated the contribution of SAP from Chlorella sp. HQ to DBP formation after *** predominant DBP precursors from SAP were identified with the 3D excitation-emission matrix fluorescence. After chlorination, a significant reduction was observed in the fluorescence intensity of five specific fluorescence regions, particularly aromatic proteins and soluble microbial by-product-like regions, accompanied with slight shifting of the peak. The produced DBPs were demonstrated to include trihalomethanes and haloacetic acids. As the algal cultivation time was extended in wastewater, the accumulated SAP strengthened the formation of DBPs. The trend for DBP formation was as follows： chloroform〉dichloroacetic acid〉trichloroacetic acid.

关键词： Chlorella sp. HQ Chlorination Disinfection byproducts Fluorescence spectroscopy Soluble algal products

Measurements of momentum correlation and interaction parameters between antiprotons

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Nuclear Science and Techniques 2016年第6期27卷 67-73页

作者： Zheng-qiao zhang Yu-Gang Ma Shanghai Institute of Applied Physics Chinese Academy ofSciencesShanghai 201800China University of Chinese Academy of Sciences Beijing 100049China

The two-particle momentum correlation is influenced by the nuclear force between two particles,which has been intensively studied for nucleons and nuclei,but not much for antinucleons or *** this proceeding,we present our STAR measurements on momentum correlation function of antiproton-antiproton and proton-proton in Au+Au collisions at S_(NN)^(1/2)= 200 GeV at the Relativistic Heavy Ion *** nuclear force between two antiprotons is demonstrated,and the strong interaction parameters(the scattering length and the effective range) are *** measurement serves as an additional verification of CPT *** present information on the strong force in the antiproton-antiproton system provides a fundamental ingredient towards understanding the structure of more sophisticated antinuclei.

关键词：动量相关作用相互作用参数反质子测量重离子对撞机散射长度核力量金+金

Strong photoluminescence of Cs_4PbBr_6 crystals: a long mystery story

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Science Bulletin 2018年第9期63卷 525-526页

作者： qiao zhang Yadong Yin Institute of Functional Nano and Soft Materials (FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices Soochow University Department of Chemistry University of California

Halide perovskite nanocrystals(NCs)with a general composition of ABX_3(A=MA,FA or Cs;B=Pb,Sn;and X=Br,I,Cl)have been widely studied for photovoltaic ***,halide perovskites NCs based light-emitting diodes(LEDs)have also attracted significant attention because they have been regarded as the next-generation display technology[1].However,we

关键词：光致发光稳定性问题故事晶体显示技术卤化物新材料二极管

Dissemination of scientific information to fight against COVID-19:Academic journals' role

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Asian Pacific Journal of Tropical Medicine 2021年第12期14卷 525-527页

作者： qiao zhang Yin Pan Editorial Office of Asian Pacific Journal of Tropical Medicine Hainan Medical UniversityHaikou 571199China

In December 2019,the unprecedented newly emerging coronavirus disease 2019(COVID-19)was first *** March 2020,the World Health Organization(WHO)declared the disease a pandemic,which posed a severe challenge for the *** the beginning of the outbreak,the origin of severe acute respiratory syndrome coronavirus 2(SARS-CoV-2),which is the causative agent of COVID-19,mode of transmission,prevention and control,diagnosis and treatment all remained ***’s worse,the disease spread rapidly and *** whole world was in *** across the globe had to make quick decisions to defeat the virus under high ***,academia,researchers and public health infrastructures around the world were not well-prepared for such a pandemic,and academic journals were also faced with the enormous task of rapidly communicating research findings on COVID-19 while maintaining scientific vigor and integrity of the published *** dissemination of the most up-to-date scientific discoveries is of great importance in the current COVID-19 pandemic;thus,the global scientific publication community has adapted to expedite the publication of important and time-sensitive COVID-19 studies.

关键词： prevention diagnosis adapted