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Effect of roller shapes on strip buckling in a continuous annealing furnace

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International Journal of Minerals,Metallurgy and Materials 2011年第3期18卷 297-302页

作者： Jing yang Di Tang Lan Su hai-tao Jiang Quan yang National Engineering Research Center of Advanced Rolling University of Science and Technology Beijing Beijing 100083 China

The effect of roller shapes on strip buckling in a continuous annealing furnace was focused on. The tensile stress distribution, the transverse compressive stress, and the critical buckling stress of the strip were studied by the finite element method （FEM） when the flat roller, crown roller, single taper roller, and double taper roller were used, respectively. Simulation results show that strip buckling is most likely to occur with the crown roller, then the double taper roller, and finally the single taper roller. Also, strip buckling can not occur when the flat roller is used. Considering strip snaking, the single taper roller and double taper roller are suggested in the continuous annealing fur-nace. The double taper roller with a better strip snaking-prevention ability should be applied in the sections with high strip temperature, and the single taper roller with a better buckling-prevention ability should be used in the sections with low strip temperature.

关键词： steel strips buckling heat treating furnaces annealing rollers finite element method

Long-term optical color behavior of a sample of blazars

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Research in Astronomy and Astrophysics 2018年第12期18卷 67-74页

作者： Xiao-Pan Li Yu-Hui Luo hai-tao yang hai-Yan yang Cheng yang Yan Cai College of Physics and Information Engineering Zhaotong University College of Photoelectron and Communication Engineering Yunnan Open University

We report on the optical color variability of a sample of 24 blazars, consisting of nine flat spectrum radio quasars(FSRQs) and 15 BL Lacertae objects(BL Lacs), on timescales of years using simultaneous V-and R-band observations observed by the Kanata telescope at Higashi-Hiroshima *** correlations between color indices V-R and magnitudes reveal that 11 BL Lacs and one FSRQ exhibited significant(i.e., r > 0.2 and P < 0.01) bluer-when-brighter(BWB) trend and two FSRQs followed the redder-when-brighter(RWB) tend, indicating a possibility that the BWB chromatic trend is dominant for BL Lacs and the RWB trend is especially found in FSRQs, which has been presented occasionally in different samples of *** superpositions of the red emission component from the Doppler-boosted relativistic jet and the blue component arising from the accretion disk might be a possible interpretation for the long-term color behaviors.

关键词： galaxies:active BL Lacertae objects:general quasars:general methods:statistical

Color compensation for multi-view video coding based on diversity of cameras

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2008年第12期9卷 1631-1637页

作者： Jun-yan HUO Yi-lin CHANG hai-tao yang Shuai WAN State Key Lab of Integrated Service Networks Xidian University Xi ＇an 710071 China Shaanxi Key Lab for Information Acquisition and Processing Northwestern Polytechnical University Xi＇an 710072 China

A novel color compensation method for multi-view video coding (MVC) is proposed, which efficiently exploits the inter-view dependencies between views with the existence of color mismatch caused by the diversity of cameras. A color compensation model is developed in RGB channels and then extended to YCbCr channels for practical use. A modified inter-view reference picture is constructed based on the color compensation model, which is more similar to the coding picture than the original inter-view reference picture. Moreover, the color compensation factors can be derived in both encoder and decoder, therefore no additional data need to be transmitted to the decoder. The experimental results show that the proposed method improves the coding efficiency of MVC and maintains good subjective quality.

关键词： Multi-view video coding (MVC) H.264/AVC Color compensation Diversity of cameras

A Quasi-periodic Oscillation of ~4.6 yr in the Radio Light Curves of Blazar PKS 0607-157

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Research in Astronomy and Astrophysics 2023年第9期23卷 105-113页

作者： Xiao-Pan Li hai-Yan yang Yan Cai Xie-Fei Song hai-tao yang Yu-Qiong Shan College of Physics and Information Engineering Zhaotong UniversityZhaotong 657000China

We present periodicity search analyses on long-term radio light curves at 4.8,8,and 14.5 GHz of blazar PKS 0607–157 observed by the University of Michigan Radio Astronomical Observatory *** highly variable radio emissions are approximately distributed as a log-normal probability distribution *** Power Spectral Density for the radio light curves can be well characterized by a power-law *** the Weighted Wavelet Z-transform and Lomb-Scargle periodogram methods,significant Quasi-periodic Oscillation(QPO)of∼4.6 yr in the radio light curve has been observed above the 3σconfidence level,which presents an interesting case among blazar QPO *** explore three plausible physical models to explain the observed QPOs:a supermassive binary black hole system,Lense-Thirring precession of the disk,and helical motion of plasma blobs within the jet.

关键词： galaxies active-(galaxies )BL Lacertae objects general-(galaxies )BL Lacertae objects individual(PKS 0607-157)

Properties of a new type Al/Pb-0.3%Ag alloy composite anode for zinc electrowinning

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International Journal of Minerals,Metallurgy and Materials 2013年第10期20卷 986-993页

作者： hai-tao yang Huan-rong Liu Yong-chun Zhang Bu-ming Chen Zhong-cheng Guo Rui-dong Xu Faculty of Metallurgical and Energy Engineering Kunming University of Science and Technology Faculty of Land Resource Engineering Kunming University of Science and Technology Kunming Hendera Science and Technology Co.Ltd. State Key Laboratory Breeding Base of Complex Nonferrous Metal Resources Cleaning Utilization

An A1/Pb-0.3%Ag alloy composite anode was produced via composite casting. Its electrocatalytic activity for the oxygen evolution reaction and corrosion resistance was evaluated by anodic polarization curves and accelerated corro- sion test, respectively. The microscopic morphologies of the anode section and anodic oxidation layer during accelerated corrosion test were obtained by scanning electron microscopy. It is found that the composite anode （hard anodizing） dis- plays a more compact interracial combination and a better adhesive strength than plating tin. Compared with industrial Pb-0.3%Ag anodes, the oxygen evolution overpotentials of A1/Pb-0.3%Ag alloy （hard anodizing） and A1/Pb-0.3%Ag alloy （plating tin） at 500 A.m-2 were lower by 57 and 14 mV, respectively. Furthermore, the corrosion rates of Pb-0.3%Ag alloy, A1/Pb-0.3%Ag alloy （hard anodizing）, and A1/Pb-0.3%Ag alloy （plating tin） were 13.977, 9.487, and 11.824 g.m-2.h-1, respectively, in accelerated corrosion test for 8 h at 2000 A-m-2. The anodic oxidation layer of A1/Pb-0.3%Ag alloy （hard anodizing） is more compact than Pb-0.3%Ag alloy and A1/Pb-0.3%Ag alloy （plating tin） after the test.

关键词： composite anodes corrosion resistance oxygen evolution reaction electrocatalytic activity zinc electrowin-ning

Flexible rGO/Fe3O4 NPs/polyurethane film with excellent electromagnetic properties

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Chinese Physics B 2019年第10期28卷 556-561页

作者： Wei-Qi Yu Yi-Chen Qiu Hong-Jun Xiao hai-tao yang Ge-Ming Wang School of Materials Science and Engineering Wuhan Institute of TechnologyWuhan 430205China National Center for Nanoscience and Technology Beijing 100190China Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China Fujian Institute of Innovation Chinese Academy of SciencesFozhou 350108China

Large-area and flexible reduced graphene oxide(rGO)/Fe3O4 NPs/polyurethane(PU) composite films are fabricated by a facile solution-processable method. The monolayer assembly of Fe3O4 nanoparticles with a high particle-stacking density on the graphene oxide(GO) sheets is achieved by mixing two immiscible solutions of Fe3O4 nanoparticles in hexane and GO in dimethylformide(DMF) by a mild sonication. The x-ray diffraction and Raman spectrum confirm the reduced process of rGO by a simple thermal treatment. The permittivity value of the composite in a frequency range of 0.1 GHz-18 GHz increases with annealing temperature of GO increasing. For 5-wt% rGO/Fe3O4 NPs/PU, the maximum refection loss(RL) of over-35 dB appears at 4.5 GHz when the thickness of film increases to 5 mm. The rGO/Fe3O4 NPs/PU film, exhibiting good electromagnetic properties over GHz frequency range, could be a potential candidate as one of microwave absorption materials in flexible electronic devices.

关键词： graphene oxide magnetic nanoparticles flexible film electromagnetic properties

Approaches being used in the national schistosomiasis elimination programme in China:a review

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Infectious Diseases of Poverty 2017年第1期6卷 475-483页

作者： Le-Ping Sun Wei Wang Qing-Biao Hong Shi-Zhu Li You-Sheng Liang hai-tao yang Xiao-Nong Zhou Key Laboratory of National Health and Family Planning Commission on Parasitic Disease Control and Prevention Wuxi 214064China Jiangsu Provincial Key Laboratory on Parasites and Vector Control Technology Wuxi 214064China Jiangsu Institute of Parasitic Diseases Wuxi 214064China School of Public Health Fujian Medical UniversityFuzhou 350004China National Institute of Parasitic Diseases Chinese Center for Disease Control and PreventionShanghai 200025China Key Laboratory for Parasite and Vector Biology National Health and Family Planning CommissionShanghai 200025China WHO Collaborating Center for Tropical Diseases National Center for International Research on Tropical DiseasesShanghai 200025China

Schistosomiasis japonica,caused by the human blood fluke Schistosoma japonicum,remains a major public health problem in China,although great success has been *** control efforts during the past half-decade,notably the wide implementation of the new integrated strategy with emphasis on control of the source of *** infection across the country since 2004,has greatly reduced *** in humans,livestock,and intermediate host Oncomelania hupensis snails,and transmission control of schistosomiasis was achieved in China in 2015.A two-stage roadmap was therefore proposed for schistosomiasis elimination in 2015,with aims to achieve transmission interruption by 2020 and achieve disease elimination by 2025 in the *** the last two decades,a variety of approaches,which target the epidemiological factors of schistosomiasis japonica have been developed,in order to block the transmission cycle of the *** approaches have been employed in the national or local schistosomiasis control activities,and facilitated,at least in part,the progress of the schistosomiasis elimination ***,we present an approach to control the source of *** infection,three new tools for snail control,three approaches for detecting and monitoring *** infection,and a novel model for health *** approaches are considered to play a great role in the stage moving towards transmission interruption and elimination of schistosomiasis in China.

关键词： Schistosomiasis japonica Schistosoma japonicum Oncomelania hupensis Elimination Snail control Source of infection Health education China

An integrated environmental improvement of marshlands:impact on control and elimination of schistosomiasis in marshland regions along the yangtze River,China

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Infectious Diseases of Poverty 2017年第1期6卷 624-633页

作者： Le-Ping Sun Wei Wang Yin-Ping Zuo Zheng-Qiu Zhang Qing-Biao Hong Guo-Jing yang Hong-Ru Zhu You-Sheng Liang hai-tao yang Key Laboratory of National Health and Family Planning Commission on Parasitic Disease Control and Prevention No.117 YangxiangMeiyuanWuxi CityJiangsu Province 214064China Jiangsu Provincial Key Laboratory on Parasites and Vector Control Technology No.117 YangxiangMeiyuanWuxi CityJiangsu Province 214064China Jiangsu Institute of Parasitic Diseases No.117 YangxiangMeiyuanWuxi CityJiangsu Province 214064China yangzhou Municipal Center for Disease Control and Prevention No.36 Yanfu East RoadYangzhou CityJiangsu Province 225000China Yizheng County Center for Disease Control and Prevention NO.1 Jiankang RoadYangzhou CityJiangsu Province 211440China

Background:Schistosomiasis is a global snail-transmitted infectious disease of *** control had been achieved in China in 2015 after the control efforts for over 60 ***,the remaining core regions endemic for Schistosoma japonicum are mainly located in the marshland and lake regions along the yangtze River ***:During the period from 2001 through 2015,an integrated environmental improvement of the marshlands was carried out through the implementation of industrial,agricultural and resources development projects in Yizheng County along the yangtze *** infection in humans,livestock and snails was estimated by serology,stool examination,hatching technique and microscopy during the 15-year study period to evaluate the effect of the integrated environmental improvement on control and elimination of ***:A 0.05%overall rate of *** infection was observed in snails during the 15-year study period,and no infected snails were detected since *** overall prevalence of *** infection was 0.09%in humans during the study period,and no human infection was found since *** addition,only 13 bovines were identified with *** infection in 2003 during the 15-year study period,and since 2004,no infection was found in ***:The results of the present study demonstrate that the implementation of industrial,agricultural and water resources development projects,not only alters snail habitats in marshland regions,and promotes local economic development,which appears a win-to-win strategy to block the transmission of *** and accelerate socio-economic development along the yangtze River.

关键词： Schistosomiasis Oncomelania hupensis Environmental improvement Marshland regions yangtze River basin China

Three-dimensional assessment of movement patterns of Sichuan snub-nosed monkeys affected by habitat structure in temperate forests

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Zoological Research 2023年第2期44卷 361-365页

作者： hai-tao yang Shun Li Rong Hou Wen-tao Song Yan-Wen Fu Yong-Bo Li Xiao-Wei Wang Gang He Colin A.Chapman Qing-Hua Guo Bao-Guo Li Shaanxi Key Laboratory for Animal Conservation College of Life SciencesNorthwest UniversityXi’anShaanxi 710069China Institute of Remote Sensing and Geographic Information System School of Earth and Space SciencesPeking UniversityBeijing 100871China Ministry of Education Key Laboratory of Poyang Lake Wetland and Watershed Research College of Geography and EnvironmentJiangxi Normal UniversityNanchangJiangxi 330022China College of Life Sciences Beijing Normal UniversityBeijing 100875China Shaanxi Key Laboratory for Animal Conservation Shaanxi Institute of ZoologyShaanxi Academy of SciencesXi’anShaanxi 710032China Biology Department Vancouver Island UniversityBritish ColumbiaV5K0A1 Canada School of Life Sciences University of KwaZulu-NatalPietermaritzburg 3200South Africa

DEAR EDITOR,Movement patterns can reflect species-specific characteristics of individuals and animal groups at a given scale. Accurate three-dimensional(3D) assessment can quantify the relationship between movement patterns of an animal and its unique habitat. Here, we evaluated the effects of habitat structure on movement patterns of the golden snub-nosed monkey(Rhinopithecus roxellana). We used airborne light detection and ranging(LiDAR) to map the 3D structure of the temperate forest in the Qinling Mountains(Shaanxi, China).

关键词： habitat movement temperate