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Adaptive Object Tracking Discriminate Model for Multi-Camera Panorama Surveillance in Airport Apron

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Computer Modeling in Engineering & Sciences 2021年第10期129卷 191-205页

作者： Dequan Guo Qingshuai Yang yu-Dong Zhang Gexiang Zhang Ming Zhu Jianying yuan School of Control Engineering Chengdu University of Information TechnologyChengdu610225China School of Computer Science Sichuan UniversityChengdu610041China Department of Informatics University of LeicesterLeicesterLE17RHUK

Autonomous intelligence plays a significant role in aviation *** most aviation accidents occur in the take-off and landing stage,accurate tracking of moving object in airport apron will be a vital approach to ensure the operation of the aircraft *** this study,an adaptive object tracking method based on a discriminant is proposed in multi-camera panorama surveillance of large-scale airport ***,based on channels of color histogram,the pre-estimated object probability map is employed to reduce searching computation,and the optimization of the disturbance suppression options can make good resistance to similar areas around the *** the object score of probability map is obtained by the sliding window,and the candidate window with the highest probability map score is selected as the new object ***,according to the new object location,the probability map is updated,the scale estimation function is adjusted to the size of real *** qualitative and quantitative analysis,the comparison experiments are verified in representative video sequences,and our approach outperforms typical methods,such as distraction-aware online tracking,mean shift,variance ratio,and adaptive colour attributes.

关键词： Autonomous intelligence discriminate model probability map scale adaptive tracking

Analysis of Crack Tip Stress of Transversal Crack on Slab Corner During Vertical-Horizontal Rolling Process by FEM

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Journal of Iron and Steel Research International 2008年第3期15卷 19-26页

作者： yu Hai-liang liu Xiang-hua WANG Guo-dong The State Key Laboratory of Rolling and Automation Northeastern University Shenyang 110004 Liaoning China

Behavior of transversal crack notched on slab corner during vertical-horizontal rolling process was simulated by FEM. The crack tip stress in the whole rolling process was obtained. Influences of the friction coefficient, the initial crack size, the edger roll profile, and the groove fillet radii of grooved edger roll on crack tip stress were analyzed. For vertical rolling, the tension stress appears at crack tip near the slab top surface and the compression stress appears at crack tip near the slab side surface for the flat edger roll; however, the compression stress appears at crack tip near the slab top surface and the tension stress appears at crack tip near the slab side surface in the exit stage for the grooved edger roll. For horizontal rolling, the tension stress appears at crack tip just at the exit stage for the flat edger roll, and the tension stress appears in whole rolling stage; the tension stress value near the slab side surface is much larger than that near the slab top surface for the grooved edger roll.

关键词： transversal crack vertical-horizontal rolling process crack tip stress FEM

The assembly of the Milky Way and its satellite galaxies

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Research in Astronomy and Astrophysics 2012年第8期12卷 1021-1043页

作者： Martin C. Smith Sakurako Okamoto Hai-Bo yuan Xiao-Wei liu Kavli Institute for Astronomy and Astrophysics Peking University Beijing 100871 China National Astronomical Observatories Chinese Academy of Sciences Beijing 100012 China LAMOST Fellow Department of Astronomy Peking University Beijing 100871 China

In recent years it has become clear that the Milky Way is an important test- ing ground for theories of galaxy formation. Much of this growth has been driven by large surveys, both photometric and spectroscopic, which are producing vast and rich catalogs of data. Through the analysis of these data sets we can gain new and detailed insights into the physical processes which shaped the Milky Way＇s evolution. This review will discuss a number of these developments, first focusing on the disk of the Milky Way, and then looking at its satellite population. The importance of surveys has not gone unnoticed by the Chinese astronomy community and in the final section we discuss a number of Chinese projects that are set to play a key role in the development of this field.

关键词： Galaxy: structure -- Galaxy: evolution -- Galaxy: kinematics and dy-namics -- Galaxy: disk -- galaxies: dwarf-- surveys

Antioxidant activity of phlorotannins from brown algae

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International Journal of Agricultural and Biological Engineering 2017年第6期10卷 184-191页

作者： Xin liu Wenqiao yuan Ratna Sharma-Shivappa John van Zanten Department of Biological and Agricultural Engineering North Carolina State UniversityRaleighNC 27695USA Golden LEAF Biomanufacturing Training&Education Center North Carolina State UniversityRaleighNC 27695USA

The antioxidant activity of the phlorotannins extracted from five marine algaespecies(Saccharina latissima,Alaria esculenta,Laminaria digitata,Fucus vesiculosusand Ascophyllum nodosum)was *** phlorotannin groups,including soluble,membrane-bound,and extracted membrane-bound phlorotannins obtained by two solvent extraction methods were investigated for their DPPH radical scavenging *** *** the highest phlorotannin yield(14.83 mg-extract/g-algae and 12.80 mg-extract/g-algae,respectively)among the five *** soluble phlorophannin(SP),membrane-bound phlorotannin(MP)and extracted membrane-bound phlorotannin(eMP)extracts all showed equal or greater DPPH radical scavenging activity than the commercial antioxidants of butylated hydroxytoluene and ascorbic *** antioxidant potential that combines phlorotannin yield and antioxidant activity of the MP extracts of *** ***(5890mL/g and 5278 mL/g algae,respectively)were higher than those of SP and eMP,suggesting that the MPs of *** *** great potential to be used as *** extraction methods also showed significantly different effects on the antioxidant activity of the phlorotannin extracts.

关键词： brown algae phlorotannin antioxidant activity antioxidant bioseparation polyphenol solvent extraction methods

Further study on the genesis of lamellar calcite veins in lacustrine black shale--A case study of Paleogene in Dongying Depression, China

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Petroleum Science 2024年第3期21卷 1508-1523页

作者： Guan-Min Wang yun-Jiao Zhang Zi-yuan Yin Rui Zhu Zhi-Yao Hou yu Bai School of Geosciences China University of Petroleum(East China)Qingdao266580ShandongChina

Lamellar calcite veins are prevalent in carbonate-rich,lacustrine dark *** formation mechanisms of these veins have been extensively debated,focusing on factors such as timing,depth,material source,and driving *** paper examines dark lacustrine shale lamellar calcite veins in the Paleogene strata of Dongying Depression,using various analytical techniques:petrography,isotope geochemistry,cathodoluminescence,inclusion thermometry,and electron probe *** distinct types of calcite veins have been identified:granular calcite veins and sparry calcite *** two types differ significantly in color,grain structure,morphology,and *** further investigation,it was observed that vein generation occurred from the shallow burial period to the maturation of organic matter,with a transition from granular calcite veins to sparry calcite *** granular calcite veins exhibit characteristics associated with the shallow burial period,including plastically deformed laminae and veins,the development of strawberry pyrite,the absence of oil and gas,weak fractionation in oxygen isotopes,and their contact relationship with sparry calcite *** granular calcite veins were likely influenced by the reduction of sulfate *** the other hand,sparry calcite veins with fibrous grains are antitaxial and closely linked to the evolution and maturation of organic *** contain oil and gas inclusions and show a distribution range of homogenization temperature between 90℃ and 120℃ and strong fractionation in oxygen isotopes,indicating formation during the hydrocarbon expulsion *** carbon isotope analysis of the surrounding rocks and veins suggests that the material for vein formation originates from the shale itself,specifically authigenic micritic calcite modified by the action of *** opening of horizontal fractures and vein formation is likely driven by fluid overpressure resulting from undercompaction and hydrocarb

关键词： Calcite veins Shale diagenesis Material source Formation period Formation mechanism

Spatio-temporal variations of vegetation carbon use efficiency and potential driving meteorological factors in the Yangtze River Basin

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Journal of Mountain Science 2020年第8期17卷 1959-1973页

作者： YE Xu-chun liu Fu-hong ZHANG Zeng-xin XU Chong-yu liu Jia Chongqing Key Laboratory of Karst Environment&School of Geographical Sciences of Southwest University Chongqing 400715China State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering Hohai UniversityNanjing 210098China Department of Geosciences University of Oslo N-0316Norway State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin Institute of Water Resources and Hydropower ResearchBeijing 100038China

Understanding of the vegetation dynamics is essential for addressing the potential threats of terrestrial *** recent years,the vegetation coverage of the Yangtze River Basin(YRB)has increased significantly,yet the spatio-temporal variations and potential driving meteorological factors of carbon use efficiency(CUE)under the context of global warming are still not *** this study,MODIS-based public-domain data during 2000–2015 was used to analyze these aspects in the YRB,a large river basin with powerful ecological functions in ***-temporal variations of CUE in different sub-basins and land cover types were investigated and the correlations with potential driving meteorological factors were *** revealed that CUE in the YRB had strong spatiotemporal variability and varied remarkably in different land cover *** the whole YRB,the average CUE of vegetated land was 0.519,while the long-term change trend of CUE was *** the rising altitude,CUE generally showed an increasing trend until the altitude of 3900 m and then followed by a decreasing *** of grasslands was generally higher than that of croplands,and then forest *** inter-annual variation of CUE in the YRB is likely to be driven by precipitation as a strong positive partial correlation between the inter-annual variability of CUE and precipitation was observed in most of sub-basins and land cover types in the *** influence of temperature and relative humidity is also outstanding in certain regions and land cover *** findings are useful from the view point of carbon cycle and reasonable land cover management under the context of global warming.

关键词： Carbon use efficiency Climate variability MODIS Altitude Land cover type Precipitation

Self-oriented central-tumor delivery of legumain-cleavable vehicles governed by circulating monocyte/macrophage for precise tumor enrichment and immune activation

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Nano Research 2023年第4期16卷 5189-5205页

作者： Fangying yu Xuwei Shang yun Zhu Lijun Peng Simin Chen Tingting Meng Hong yuan Fuqiang Hu College of Pharmaceutical Science Zhejiang UniversityHangzhou 310058China Department of Pharmacy Nanjing Drum Tower Hospitalthe Affiliated Hospital of Nanjing University Medical SchoolNanjing 210008China

Compressed blood and intratumoral lymphatic vessels induced by proliferated tumor cells and elevated interstitial fluid pressure produce regional hypoxic and necrotic region within tumors,which severely reduced the accessibility of immunogenic cell death(ICD)related drugs and immune-related ***,the strategy of self-oriented deep tumor delivery by circulating monocyte/macrophage was ***,CS-AI including an indoleamine 2,3-dioxygenase(IDO)inhibitor indoximod(IND)and hydrophilic chitosan(CSO)linked with alanine-alanine-asparagine(AAN)was prepared,which could be selectively cleaved by legumain overexpressed in macrophages and promote the collapse in ***,CS-AI was modified with mannose on the surface and further encapsulated the ICD inducer doxorubicin(DOX)to obtain M-CS-AI/*** intravenous injection,MCS-AI/DOX was specially recognized and internalized by circulating monocyte in *** formed drugs/monocyte tend to distribute in hypoxia/necrosis region guided by the homing signals released by *** monocytes then further differentiated into macrophages,up-regulating the expression of legumain and promoting the sensitive-release of chemo-drug DOX,IND,and the mannose-modified CSO(M-CSO).The released IND would specifically regulate immunosuppressive tumor microenvironment,and synergistically inhibit tumor growth with immune activation elements,ICD-induced DOX,and the favorable adjuvant *** summary,the self-oriented deep tumor delivery of legumain-cleavable nanovesicles through circulating monocyte makes it possible for reaching tumor regions inaccessible for nanoparticles and provides a novel insight for precise tumor enrichment and immune activation.

关键词： self-oriented circulating monocyte/macrophage hitchhike legumain-sensitive vehicles precise central-tumor enrichment immune activation

SlGRAS4 accelerates fruit ripening by regulating ethylene biosynthesis genes and SlMADS1 in tomato

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Horticulture Research 2021年第1期8卷 136-146页

作者： yudong liu yuan Shi Deding Su Wang Lu Zhengguo Li Key Laboratory of Plant Hormones and Development Regulation of Chongqing School of Life SciencesChongqing University401331 ChongqingChina Center of Plant Functional Genomics Institute of Advanced Interdisciplinary StudiesChongqing University401331 ChongqingChina

GRAS proteins are plant-specific transcription factors that play crucial roles in plant development and stress ***,their involvement in the ripening of economically important fruits and their transcriptional regulatory mechanisms remain largely ***,we demonstrated that SlGRAS4,encoding a transcription factor of the GRAS family,was induced by the tomato ripening process and regulated by *** of SlGRAS4 accelerated fruit ripening,increased the total carotenoid content and increased PSY1 expression in SlGRAS4-OE fruit compared to wild-type *** expression levels of key ethylene biosynthesis genes(SlACS2,SlACS4,SlACO1,and SlACO3)and crucial ripening regulators(RIN and NOR)were increased in SlGRAS4-OE *** negative regulator of tomato fruit ripening,SlMADS1,was repressed in OE *** ethylene and 1-MCP treatment revealed that more endogenous ethylene was derived in SlGRAS4-OE *** obvious phenotypes were observed in OE seedlings after ACC *** one-hybrid and dual-luciferase assays confirmed that SlGRAS4 can directly bind SlACO1 and SlACO3 promoters to activate their transcription,and SlGRAS4 can also directly repress SlMADS1 *** study identified that SlGRAS4 acts as a new regulator of fruit ripening by regulating ethylene biosynthesis genes in a direct *** provides new knowledge of GRAS transcription factors involved in regulating fruit ripening.

关键词： fir GRAS fruit

Land Degradation Evaluation in North Hebei Province Based on Remote Sensing and GIS

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Chinese Journal of Population,Resources and Environment 2006年第3期4卷 28-36页

作者： yuan Jinguo liu Jinsong Wang Wei Niu Zheng State Key Laboratory of Remote Sensing Science Institute of Remote Sensing Applications Chinese Academy of Sciences Beijing 100101 China College of Resources and Environmental Sciences Hebe[Normal University Shijiazhuang 050016 China

Land degradation is one of the serious environmental problems that can lead to poverty, and is especially prominent in eco-fragile areas in developing countries and increases the risk of environmental safety. North Hebei Province belongs to an ecologically fragile region in North China, which has great impact on the eco-safety of Beijing and Tianjin. Using Landsat TM data and GIS, this paper evaluates land degradation in North Hebei province of China from the the 1960′s to 1987 and 2000. Land use/cover change pattern from 1987 to 2000, its regional difference and forest change characteristics will also be analyzed; soil erosion intensity and arable land suitability were also evaluated. Results revealed that land use/cover pattern in this study area did not change greatly from 1987 to 2000. The structure and function of regional land ecosystem was at a level of local improvement and integral deterioration. Land above medium soil erosion intensity reached 21 percent, which was also the area with a serious soil erosion and land degradation problem. Soil erosion and land degradation intensity of grassland was the biggest. For the present arable land, the proportion of high suitability was 13 percent.

关键词： land degradation North Hebei Province soil erosion intensity arable land suitability evaluation