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Comparative study of performance comparison of AlSi10Mg alloy prepared by selective laser melting and casting

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Journal of Materials Science & Technology 2020年第6期41卷 199-208页

作者： Qian yan bo Song Yusheng Shi State Key Laboratory of Materials Processing and Die&Mould Technology Huazhong University of Science and TechnologyWuhan430074China

The influence of the microstructure on mechanical properties of AlSi10Mg fabricated by casting and selective laser melting(SLM)were investigated and contrasted in this work,with an emphasis on understanding the forming *** microstructure,phase structure and mechanical properties were characterized by scanning electron microscopy/field-emission Transmission Electron Microscopy(SEM/TEM),X-Ray Diffraction(XRD),tensile and fatigue *** results indicated that the SLM AlSi10Mg exhibited a supersaturated Si network structure precipitated alongα-Al ***β-Al5FeSi andπ-Al8FeMg3Si6 phases were found in the as-cast and SLM AlSi10Mg respectively due to different thermal histories during *** SLM AlSi10Mg showed higher tensile strength but lower elongation than the casting,as the result of grain refinement and tortuous crack *** fatigue results revealed that unmelted powder,oxide inclusion and pores can considerably degrade the fatigue properties for the SLM *** SLM process offered a new method for material processing that would avoid harmful Fe-bearing intermetallic compounds and refine the microstructures for enhancing strength.

关键词： Selective laser melting Casting AlSi10Mg Intermetallic compound Mechanical properties

FasParser:a package for manipulating sequence data

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Zoological Research 2017年第2期38卷 110-112页

作者： yan-bo Sun State Key Laboratory of Genetic Resources and Evolution Kunming Institute of Zoology Chinese Academy of Sciences Kunming 650223 China

A computer software package called ＇FasParser＇ was developed for manipulating sequence data. It can be used on personal computers to perform series of analyses, including counting and viewing differences between two sequences at both DNA and codon levels, identifying overlapping regions between two alignments, sorting of sequences according to their IDs or lengths, concatenating sequences of multiple loci for a particular set of samples, translating nucleotide sequences to amino acids, and constructing alignments in several different formats, as well as some extracting and filtrating of data for a particular FASTA file. Majority of these functions can be run in a batch mode, which is very useful for analyzing large data sets. This package can be used by a broad audience, and is designed for researchers that do not have programming experience in sequence analyses. The GUI version of FasParser can be downloaded from https：//***/Sun-yanbo/FasParser, free of charge

关键词： FasParser Batch processing Sequencecomparison Extraction and filtration

Two New Lipschitz Type Spaces and Their Characterizations

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Acta Mathematica Sinica,English Series 2022年第9期38卷 1523-1536页

作者： ming Quan WEI Dun yan yan School of Mathematics and Statistics Xinyang Normal UniversityXinyang 464000P.R.China School of Mathematical Sciences University of Chinese Academy of SciencesBeijing 100049P.R.China

In this paper,we first introduce the weak Lipschitz spaces WLip_(q,α),1 详细信息

In this paper,we first introduce the weak Lipschitz spaces WLip_(q,α),1bounded from L~p to L^(q,∞) for some p ∈(1,∞) and 1/p-1/q=(α+β)/n if and only if b is in Lip_(α).We also introduce the weak central bounded mean oscillation space WCBMO_(q,α) and give a characterization of WCBMO_(q,α) via the boundedness of the commutators of Hardy type operators.

关键词： Weak Lipschitz space commutator fractional maximal operator weak central bounded mean oscillation space Hardy operator

Stimuli-responsive organic phosphorescence through energy transfer

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Science China Chemistry 2021年第4期64卷 509-510页

作者： bo Zhou Dongpeng yan Beijing Key Laboratory of Energy Conversion and Storage Materials College of ChemistryBeijing Normal UniversityBeijing 100875China College of Chemistry and Molecular Engineering Zhengzhou UniversityZhengzhou 450001China

Organic room-temperature phosphorescence(RTP)has attracted much academic and engineering interest in the fields of bioimaging,light-emitting devices,and *** is documented that the triplet excitons for generating RTP i... 详细信息

关键词： phosphor RTP generating

Meroterpenes from endophytic fungus of Scyphiphora hydrophyllacea

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Meroterpenes from endophytic fungus of Scyphiphora hydrophyl...

Effect of annealing temperature on the microstructure and optoelectrical properties of ZnO thin films and their application in self-powered accelerometers

中国化学会第9届天然有机化学学术会议

作者： Wen-li Mei~(1,+),bo Zheng~(1,2,+),You-Xing Zhao~1,Hui-ming Zhong~2,yan-bo Zeng~1,Wen-Hua Dong~1,Hao-Fu Dai~(1*) 1 Key Laboratory of Biology and Genetic Resources of Tropical Crops,Ministry of Agriculture,Institute of Tropical Bioscience and Biotechnology,Chinese Academy of Tropical Agriculture Sciences, Haikou 571101,People''s Republic of China 2 College of Chemistry and Molecular Engineering,Qingdao University of Science and Technology, Qingdao,266042,People''s Republic of China.

＜正＞Four new meroterpenes,guignardones F-I（1-4）,together with two known compounds guignardones A（5） and B（6）,were isolated from the endophytic fungus Al {Guignardia sp.) of mangrove plant Scyphiphora *** 2-4 have similar tricyclic skeleton to tricycloalternarene series isolated from some phyto-pathogenic fungi,mainly Alternaria *** A（5） and B（6） with an additional tetrahydrofuran ring in their structure have been isolated from a fungus Guignardia mangiferae associated with Ilex cornuta ***,compound 1 possessed a novel structure,beside an additional

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International Journal of Minerals,Metallurgy and Materials 2019年第9期26卷 1186-1193页

作者： Xiao-zhou Zhang yan-ping Xia Xing Liu Yi-ming Zhong Hai-bo Zhao Pei-hong Wang School of Physics & Materials Science Anhui University

This paper reports a piezoelectric nanogenerator(NG) with a thickness of approximately 80 μm for miniaturized self-powered acceleration sensors. To deposit the piezoelectric zinc oxide(ZnO) thin film, a magnetron sputtering machine was used. Polymethyl methacrylate(PMMA) and aluminum-doped zinc oxide(AZO) were used as the insulating layer and the top electrode of the NG, respectively. The experimental results show that the ZnO thin films annealed at 150℃ exhibited the highest crystallinity among the prepared films and an optical band gap of 3.24 eV. The NG fabricated with an AZO/PMMA/ZnO/stainless steel configuration exhibited a higher output voltage than the device with an AZO/ZnO/PMMA/stainless steel configuration. In addition, the annealing temperature affected the open-circuit voltage of the NGs;the output voltage reached 3.81 V when the annealing temperature was 150℃. The open-circuit voltage of the prepared self-powered accelerometer increased linearly with acceleration. In addition, the small NG-based accelerometer, which exhibited excellent fatigue resistance, can be used for acceleration measurements of small and lightweight devices.

关键词： piezoelectric ZnO thin film RF magnetron sputtering annealing temperature accelerometer

Inclusion of peanut in wheat–maize rotation increases wheat yield and net return and improves soil organic carbon pool by optimizing bacterial community

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Journal of Integrative Agriculture 2023年第11期22卷 3430-3443页

作者： ZOU Xiao-xia HUANG ming-ming LIU yan SI Tong ZHANG Xiao-jun YU Xiao-na GUO Feng WAN Shu-bo Shandong Provincial Key Laboratory of Dryland Farming Technology/Shandong Peanut Industry Collaborative Innovation Center/College of Agronomy Qingdao Agricultural UniversityQingdao 266109P.R.China Institute of Crop Germplasm Resources Shandong Academy of Agricultural SciencesJinan 250100P.R.China

Improving soil quality while achieving higher productivity is the major challenge in the agricultural industry. Wheat(Triticum aestivum L.)–maize(Zea mays L.)(W–M) rotation is the dominant planting pattern in the Huang-HuaiHai Plain and is important for food security in China. However, the soil quality is deteriorating due to the W–M rotation’s long-term, intensive, and continuous cultivation. Introducing legumes into the W–M rotation system may be an effective way to improve soil quality. In this study, we aimed to verify this hypothesis by exploring efficient planting systems(wheat–peanut(Arachis hypogaea L.)(W–P) rotation and wheat rotated with maize and peanut intercropping(W–M/P)) to achieve higher agricultural production in the Huang-Huai-Hai Plain. Using traditional W–M rotation as the control, we evaluated crop productivity, net returns, soil microorganisms(SMs), and soil organic carbon(SOC) fractions for three consecutive years. The results indicated that wheat yields were significantly increased under W–P and W–M/P(382.5–579.0 and 179.8–513.1 kg ha-1, respectively) compared with W–M. W–P and W–M/P provided significantly higher net returns(58.2 and 70.4%, respectively) than W–M. W–M/P and W–M retained the SOC stock more efficiently than W–P, increasing by 25.46–31.03 and 14.47–27.64%, respectively, in the 0–20 cm soil layer. Compared with W–M, W–M/P improved labile carbon fractions;the sensitivity index of potentially mineralizable carbon, microbial biomass carbon(MBC), and dissolved organic carbon was 31.5, 96.5–157.2, and 17.8% in 20–40, 10–40, and 10–20 cm soil layers, respectively. The bacterial community composition and bacteria function were altered as per the soil depth and planting pattern. W–M/P and W–M exhibited similar bacterial community composition and function in 0–20 and 20–40 cm soil layers. Compared with W–P, a higher abundance of functional genes, namely, contains mobile elements and stress-tolerant, and a lower abundance of genes, namely,

关键词： composite planting carbon sequestration labile carbon fraction bacterial community structure bacterial functions

Large language models and brain-inspired general intelligence

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National Science Review 2023年第10期10卷 6-7页

作者： bo Xu Mu-ming Poo Institute of Automation Chinese Academy of Sciences CAS Center for Excellence for Brain Science and Intelligence Technology

The emergence of large language models(LLMs) such as ChatGPT/GPT-4 and their stunning performance in generative tasks heralds the beginning of a new era of artificial general intelligence(AGI).The LLMs have shown amazing generalization ability in natural language processing,computer vision and other generative tasks [1].These models point to a feasible approach for developing *** a large extent,they have passed the classical Turing test and their capability is still growing without an upper bound identified.

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Pericyclases for cycloaddition

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National Science Review 2022年第11期9卷 13-16页

作者： bo Zhang Hui ming Ge State Key Laboratory of Pharmaceutical Biotechnology Institute of Functional BiomoleculesSchool of Life Sciences Chemistry and Biomedicine Innovation Center (ChemBIC) Nanjing University

The Diels–Alder (DA) reaction is a simple yet very powerful pericyclic transformation involving the cycloaddition of a 1,3-diene and a dienophile to synthesize a cyclohexene ring via a cyclic transition state. Its importance was recognized by Nobel Prizes in Chemistry. Since the first application of the DA reaction in the total synthesis of the steroids cortisone and cholesterol in 1952, significant progress has been made in the understanding and utility of DA reactions [1].

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