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Two species in Hymenochaetaceae （Basidiomycota） new to China

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菌物学报 2008年第1期27卷 151-155页

作者： yuan hai-sheng dai yu-cheng Institute of Applied Ecology Chinese Academy of Sciences Shenyang 110016 China

1 INTRODUCTION Wood-inhabiting fungi from northern China were investigated extensively during last ten years, and the species in the area are relatively well known (dai 2000; dai et al. 2006, 2007; Wei et al. 2005;

关键词：中国锈革孔菌科新记录新种

PS Vir:a short-period solar-like contact binary

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Research in Astronomy and Astrophysics 2018年第7期18卷 45-52页

作者： Hui-yu yuan hai-Feng dai yuan-Gui Yang Information College Huaibei Normal University School of Physics and Electronic Information Huaibei Normal University

We present multi-color photometric observations and a one-dimensional spectrum, acquired from March 2016 to May 2017, for the short-period eclipsing binary PS Vir, by using the 2.16-m, 85-cm and 60-cm telescopes at Xinglong station, which is administered by National Astronomical Observatories, Chinese Academy of Sciences. The spectral type was determined as G2V from the one-dimensional spectrum. The photometric solution was reduced from BVRc light curves. The results imply that PS Vir is a W-subtype contact binary with a mass ratio of q - 0.305（zk0.008） and a fill-out factor of f = 14.4（＋1.8）%. The orbital period may be undergoing a cyclic oscillation with an ampli-tude of A = 0.0027（~0.0001）d and a modulated period of 11.7（4-0.2） yr, which may result from the light-time effect due to a third body. The lower limit on mass for the assumed component is 0.12 Me. Moreover, the more massive component of PS Vir may be a bit more evolved star as determined from the mass-luminosity diagram.

关键词： binaries close-binaries eclipsing-stars individual(PS Vir)-stars

IU Cancri:a solar-type contact binary with mass transfer

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Research in Astronomy and Astrophysics 2019年第6期19卷 89-96页

作者： Hui-yu yuan hai-Feng dai yuan-Gui Yang Information College Huaibei Normal University Huaibei 235000 China School of Physics and Electronic Information Huaibei Normal University Huaibei 235000 China

We present new CCD photometry of the solar-type contact binary IU Cnc, which was observed from November 2017 to March 2018 with three small telescopes in China. BV light curves imply that IU Cnc is a W-type contact binary with total eclipses. The photometric solution indicates that the mass ratio and fill-out factor are q = 4.104 ± 0.004 and f = 30.2%± 0.3%, respectively. From all available light minimum times, the orbital period may increase at a rate of dP/dt =+6.93(4)× 10^-7 d yr^-1, which may result from mass transfer from the secondary component to the primary one. With mass transferring,IU Cnc may evolve from a contact configuration into a semi-detached configuration.

关键词： binaries:close-binaries eclipsing-stars individual(IU Cancri)

New photometric studies for two deep,low-mass ratio overcontact binaries:Y Sex and V1363Ori

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Research in Astronomy and Astrophysics 2021年第11期21卷 189-201页

作者： yuan-Gui Yang Shuang Wang Hui-yu yuan hai-Geng dai School of Physics and Electronic Information Huaibei Normal UniversityHuaibei 235000China

We present new photometry for two contact binaries,Y Sex and V1363 Ori,which were observed by three small telescopes in *** using the W-D method,the absolute parameters are updated from new BVR light curves and previous radial velocity *** identify that two binaries are deep,lowmass ratio(DLMR)overcontact binaries with q≤0.25 and f≥50%.From the temperature-luminosity diagram,the primary components are slightly evolved main-sequence stars,whose evolutionary ages are~2.51 Gyr for Y Sex and~3.56 Gyr for V 1363 Ori,*** the(O-C)curves,it is found that the orbital periods may be undergoing secular increase with cyclic variations,which may be interpreted either by magnetic activity cycles or by the light-time orbit *** period increasing,this kind of DLMR overcontact binaries,such as Y Sex and V1363 Ori,will evolve into the rapid-rotating single stars.

关键词： binaries(including multiple):close binaries:eclipsing stars:fundamental parameters stars:individual(Y Sex,V1363 Ori)

Experimental Study on the Cyclic Behavior of Monopiles in Fine Sandy Beds Under Regular Waves

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China Ocean Engineering 2017年第5期31卷 607-617页

作者： HUANG Ting ZHENG Jin-hai ZHANG Ji-sheng yuan yu WU Bin Key Laboratory of Coastal Disaster and Defence Ministry of EducationHohai University College of Harbor Coastal and Offshore EngineeringHohai University

This paper presents an experimental study on the wave-induced behavior of monopiles. Laboratory experiments were conducted at the constant initial state of the sandy beds in a wave flume with a soil trench. The responses of the pile- head displacement, the pile strain and the pore water pressure on regular waves were investigated. The experimental results show that the monopiles lean along the direction of the wave progression and the inclination increases with the duration of wave actions. The pile-head displacement （consisting of the permanent displacement and cyclic displacement） increases as the wave height increases, especially more significantly for the permanent displacement. The head-fixed pile suffers from larger wave load than that on the head-free pile under the same wave condition. Increasing pile diameter or fixing fins on the monopile is effective in reducing the pore water pressure in the upper part of the bed and the permanent displacement.

关键词： monopile fine sandy bed displacement wave load pore water pressure

A photometric-spectroscopic study of the infrared-excess eclipsing binary V2364 Cyg

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Research in Astronomy and Astrophysics 2020年第12期20卷 307-316页

作者： Hui-yu yuan Lin-Qiao Jiang hai-Feng dai Shuang Wang yuan-Gui Yang Information College&School of Physics and Electronic Information Huaibei Normal UniversityHuaibei 235000China Artificial Intelligence Key Laboratory of Sichuan Province Sichuan University of Science&EngineeringZigong 643000China

The eclipsing binary V2364 Cyg is an A7 V-type contact binary with a period of 0.5921 *** present six spectra from LAMOST and BVRc light curves(LCs),which are simultaneously analyzed to obtain the absolute physical *** first light maxima are brighter than the second ones by up to 0.m038,0.m036 and 0.m024 for BVRc bands,*** distorted LCs are modeled by a cool spot on the less massive *** mass ratio and over-contact degree are q=0.319(±0.004) and f=28.4%(±1.0) % *** the mass-luminosity diagram,the primary component is a normal main-sequence star,while the secondary one is a subgiant *** the(O-C) curve,the orbital period secularly decreases at a rate dP/dt=-1.62(±0.03) × 10^-7 dyr^-1,which is mainly attributed to mass loss via stellar wind from the binary *** may result in the observed infrared excess in the W4 band.

关键词： stars:circumstellar matter stars:binaries:close stars:individual(V2364 Cyg) mass loss infrared excess

Surface Cu^(+) modified ZnIn_(2)S_(4) for promoted visible-light photocatalytic hydrogen evolution

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Journal of Energy Chemistry 2022年第11期31卷 341-348,I0009页

作者： Wen Li Jia Wen Jing Li hai Yang yuan Xuefeng Wu yuanwei Liu sheng dai Qilin cheng Peng Fei Liu Hua Gui Yang Key Laboratory for Ultrafine Materials of Ministry of Education Shanghai Engineering Research Center of Hierarchical NanomaterialsSchool of Materials Science and EngineeringEast China University of Science and TechnologyShanghai 200237China Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center Institute of Fine ChemicalsSchool of Chemistry and Molecular EngineeringEast China University of Science and TechnologyShanghai 200237China

Surface modification by metal ion has been considered a promising strategy to enhance the photocatalytic activity by extending optical response and improving charge separation and ***,univalent copper species were modified on ZnIn_(2)S_(4)photocatalyst via an in-situ photodeposition method,exhibiting a much higher H2evolution rate of 41.10±3.43 mmol g^(-1)h^(-1)and an impressive apparent quantum efficiency(AQE)of 20.81%at 420±15 *** characterizations indicate that the surface modification by copper species can broaden light utilization as well as promote charge separation and ***,the density functional theory(DFT)results further exhibit that the energy levels(LUMO and HOMO)for copper-surface modified ZnIn_(2)S_(4)present spatial separation,locating on the Zn-S and In-S layers,respectively,which can suppress the recombination of electron and hole and thus achieves higher photocatalytic H2evolution efficiency.

关键词： Surface modification Univalent copper species Charge separation and transportation HOMO-LUMO spatial separation Photocatalytic hydrogen evolution

Advances in the design and development of SARS-CoV-2 vaccines

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Military Medical Research 2022年第4期9卷 484-513页

作者： Xue-Liang Peng Ji-Si-yu cheng hai-Lun Gong Meng-Di yuan Xiao-Hong Zhao Zibiao Li dai-Xu Wei Key Laboratory of Resource Biology and Biotechnology in Western China Ministry of EducationSchool of MedicineDepartment of Life Sciences and MedicineNorthwest UniversityXi'an 710069China Institute of Materials Research and Engineering A*STAR(Agency for ScienceTechnology and Research)2 Fusionopolis WayInnovis#08-03Singapore 138634Singapore.

Since the end of 2019,coronavirus disease 2019(COVID-19)caused by severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)has spread *** RNA genome of SARS-CoV-2,which is highly infectious and prone to rapid mutation,encodes both structural and non-structural *** is currently the only effective method to prevent COVID-19,and structural proteins are critical targets for vaccine ***,many vaccines are in clinical trials or are already on the *** review highlights ongoing advances in the design of prophylactic or therapeutic vaccines against COVID-19,including viral vector vaccines,DNA vaccines,RNA vaccines,live-attenuated vaccines,inactivated virus vaccines,recombinant protein vaccines and bionic nanoparticle *** addition to traditional inactivated virus vaccines,some novel vaccines based on viral vectors,nanoscience and synthetic biology also play important roles in combating ***,many challenges persist in ongoing clinical trials.

关键词： Severe acute respiratory syndrome coronavirus 2 Coronavirus disease 2019 Vaccine Synthetic biology Nanoscience

Weathering geochemistry and palaeoclimate implication of the Early Permian mudstones from eastern Henan Province, North China

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Journal of Palaeogeography 2017年第4期6卷 370-380页

作者： Jiang-hai Yang yuan-sheng Du State Key Laboratory of Biogeology and Environmental Geology China University of Geosciences

Terrigenous clastic sediments are generated by the integration of the Earth surface processes and their deep-time counterparts provide a valuable archive for regional/global climatic, geographic and landscape evolution. It is thus important to read and interpret these deep-time sedimentary records, especially for reconstructing continent climate. Previous studies on the Early Permian sequences from the North China document a dominant control of source chemical weathering on mudstone compositions and its linkage with continent climate conditions. Based on the weathering geochemical data of these mudstones, element mobility during weathering can be ordered as Ca 〉 Na ≥ Mg 〉 Sr 〉 K ≥ Ba 〉 Rb. The weathering regime in the source area is inferred to be supply-limited according to the estimated continent physical erosion rate and regional tectonic evolution, sedimentation in North China. Further exploration of palaeoclimate implication is presented in terms of variation of high-to-low latitudinal temperature gradient across the Early Permian glacial to post-glacial climate transition.

关键词： Chemical weathering Weathering geochemistry Mudstones Early Permian North China