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Depth-aided inpainting for disocclusion restoration of multi-view images using depth-image-based rendering

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2009年第12期10卷 1738-1749页

作者： kai luo dong-xiao li Ya-mei FENG ming zhang Department of Information Science and Electronic Engineering Zhejiang University Hangzhou 310027 China

A new algorithm is proposed for restoring disocclusion regions in depth-image-based rendering （DIBR） warped images. Current solutions include layered depth image （LDI）, pre-filtering methods, and post-processing methods. The LDI is complicated, and pre-filtering of depth images causes noticeable geometrical distortions in cases of large baseline warping. This paper presents a depth-aided inpainting method which inherits merits from Criminisi＇s inpainting algorithm. The proposed method features incorporation of a depth cue into texture estimation. The algorithm efficiently handles depth ambiguity by penalizing larger Lagrange multipliers of flling points closer to the warping position compared with the surrounding existing points. We perform morphological operations on depth images to accelerate the algorithm convergence, and adopt a luma-first strategy to adapt to various color sampling formats. Experiments on test multi-view sequence showed that our method has superiority in depth differentiation and geometrical loyalty in the restoration of warped images. Also, peak signal-to-noise ratio （PSNR） statistics on non-hole regions and whole image comparisons both compare favorably to those obtained by state of the art techniques.

关键词： Depth-aided inpainting Disocclusion restoration Depth-image-based rendering (DIBR) Image warping Stereoscopic image Multi-view image 3D-TV

Enhanced mechanical performance of gradient-structured CoCrFeMnNi high-entropy alloys induced by industrial shot-blasting

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Rare Metals 2023年第3期42卷 982-993页

作者： ming-Zhi zhang Kun zhang kai-kai Song xiao-Yu Zou Wei-dong Song Ke-Feng li li-Na Hu Ze-Qun zhang Jürgen Eckert Shenzhen Research Institute of Shandong University Shenzhen 518057China CAS Key Laboratory of Microgravity(National Microgravity Laboratory) Institute of MechanicsChinese Academy of SciencesBeijing100190China State Key Laboratory of Explosion Science and Technology Beijing Institute of TechnologyBeijing 100081China School of Mechanical Electrical and Information EngineeringShandong UniversityWeihai 264209China Guangdong Institute of Materials and Processing Guangdong Academy of SciencesGuangzhou 510650China Key Laboratory for liquid-Solid Structural Evolution and Processing of Materials(Ministry of Education) Shandong UniversityJinan 250061China Erich Schmid Institute of Materials Science Austrian Academy of SciencesLeoben 8700Austria Department of Materials Science Montanuniversitat LeobenLeoben 8700Austria

In this study,CoCrFeMnNi high-entropy alloys(HEAs)with a surface gradient nanostructure were produced using industrial shot blasting,which improved their mechanical properties compared to the untreated *** severely plastically deformed(SPD)surface layer had a multi-scale hierarchical structure with a high density of stacking faults,deformation nanotwins,and amorphous *** depth of the SPD layer steadily increased as the shot-blasting time *** differences in the microhardness and tensile strength before and after shotblasting demonstrated the significant effect of the SPD layer on the mechanical *** microhardness of the homogenized HEA was~5 *** comparison,the maximum microhardness of the specimens after 20 min of shot blasting was~8.0 GPa at the *** yield strength also improved by 178%,and a large ductility of~36%was *** nanograin boundary,stacking fault,and twin strengthening within the gradientnanostructured surface layer caused the strength to *** tensile deformation,strain concentration began at the surface of the specimen and gradually spread to the ***,the gradient-nanostructured surface layer with improved strain hardening can prevent early necking and ensure steady plastic deformation so that high toughness is achieved.

关键词： High-entropy alloy Shot blasting Gradient structure Mechanical property Deformation mechanism

Improved hydrogen storage performance of as-milled Sm-Mg-Ni alloy by adding CeO2

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Journal of Iron and Steel Research International 2018年第12期25卷 1255-1264页

作者： Yang-huan zhang kai-feng zhang Ze-ming Yuan Ya-qin li Hong-wei Shang Yan Qi xiao-ping dong dong-liang Zhao Key Laboratory of Integrated Exploitation of Baiyun Obo Multi-Metal Resources Inner Mongolia University of Science and TechnologyBaotou 014010Inner Mongolia China Department of Functional Material Research Central Iron and Steel Research InstituteBeijing 100081China Department of Mechanical Engineering Hebei University Baoding 071002HebeiChina

To investigate the influence of adding CeO2 on the hydrogen storage characteristics of Sm-Mg-Ni-based SmMg11Ni-type alloy,mechanical milling was utilized to synthesize SrnMg11Ni and SmMg11Ni +5 wt.%CeO2 (named SmMg11Ni- 5CeO2)*** microstructure of as-castand as-milled samples was measured via X-ray diffractometer and transmission electron *** device was utilized to measure the isothermal hydriding and dehydriding kinetics. The non-isothermal dehydrogenation performance was explored by thermogravimetry and differential scanning *** hydrogen desorption activation energy of the compound metal hydride can be computed by both Arrhenius and Kissinger *** related data show that adding CeO2 can engender a very slight influence on the hydrogen storage thermodynamics,but it can result in an obvious reduction in hydrogen absorption and desorption ***,the hydrogen desorption performance of experimental alloys is conspicuously ameliorated by the addition of CeO2,*** the initial hydrogen desorption temperature and enhancing hydrogen desorption *** hydrogen desorpfion activation energies with and without CeO2 addition are 84.28 and 100.31 kJ/mol,respectively,with an obvious decrease of 16.03 kJ/*** is thought to be responsible for the ameliorated hydrogen desorption kinetics by adding CeO2.

关键词： Mg-based alloy Mechanical milling Activation energy Catalysis Hydrogen storage kinetics

Sensing mechanism of Ag/α-MoO_(3) nanobelts for H_(2)S gas sensor

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Rare Metals 2021年第6期40卷 1545-1553页

作者： Shi-kai Shen Xin-Lei Cui Chuan-Yu Guo Xin dong Xian-Fa zhang xiao-li Cheng li-Hua Huo Ying-ming Xu School of Electrical Engineering Suihua UniversitySuihua 152000China Key Laboratory of Functional Inorganic Material Chemistry Ministry of Education of the People’s Republic of ChinaHeilongjiang UniversityHarbin 150080China Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education Guangdong Engineering Technology Research Center for High-Performance Organic and Polymer Photoelectric Functional FilmsSchool of ChemistrySun Yat-Sen UniversityGuangzhou 510275China

Sensing mechanism is still a big problem in the field of gas ***-depth study of the sensing mechanism can provide better ideas for the design of sensing materials,and it is also more conducive to the improvement in gas-sensing *** this work,Ag/α-MoO_(3) material was obtained by loading Ag in α-MoO_(3) nanobelts prepared by hydrothermal *** material was characterized by field electron scanning electron microscopy(SEM),high-resolution transmission electron microscopy(HRTEM),X-ray diffraction(XRD) and X-ray photoelectron spectroscopy(XPS).Comparing the gas sensing properties of α-MoO_(3) and Ag/α-MoO_(3),it is found that Ag effectively improves the selectivity of the material to H_(2)S at 133℃.The response of the 5 wt% Ag/α-MoO_(3) sensor to 100 × 10-6 hydrogen sulfide(H_(2)S) is 225 and the detection limit is 100 ×10^(-9).The sensing mechanism was verified by gas chromatography and mass spectrometer(GC-MS),XPS and Fourier transform infrared spectroscopy(FTIR).

关键词： Ag/α-MoO_(3) Nanobelt Gas sensor Hydrogen sulfide Sensing mechanism

Simulation study of BESⅢwith stitched CMOS pixel detector using AcTs

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Nuclear Science and Techniques 2023年第12期34卷 264-270页

作者： Yi liu xiao‑Cong Ai Guang‑Yan xiao Ya‑Xuan li ling‑Hui Wu liang‑liang Wang Jia‑Ning dong ming‑Yi dong Qing‑lin Geng Min luo Yan Niu An‑Qing Wang Chen‑Xu Wang Meng Wang Lei zhang liang zhang Rui‑kai zhang Yao zhang ming‑Gang Zhao Yang Zhou School of Physics and Microelectronics Zhengzhou UniversityZhengzhou 450001China School of Physics Nanjing UniversityNanjing 210093China School of Physics Nankai UniversityTianjin 300071China Institute of High Energy Physics Chinese Academy of Sciences19B Yuquan RoadShijingshan DistrictBeijing 100049China Research Center for Particle Science and Technology Institute of Frontier and Interdisciplinary ScienceShandong UniversityQingdao 266237China University of Chinese Academy of Sciences 19A Yuquan RoadShijingshan DistrictBeijing 100049China School of Information Science and Engineering Harbin Institute of TechnologyWeihai 264209China

The reconstruction of the tracks of charged particles with high precision is crucial for HEP experiments to achieve their physics *** BESⅢdrift chamber,which is used as the tracking detector of the BESⅢexperiment,has suffered from aging effects resulting in degraded tracking performance after operation for approximately 15 *** preserve and enhance the tracking performance of BESⅢ,one of the proposals is to add one layer of a thin cylindrical CMOS pixel sensor based on state-of-the-art stitching technology between the beam pipe and the drift *** improvement in the tracking performance of BESⅢwith such an additional pixel detector compared to that with only the existing drift chamber was studied using the modern common tracking software Acts,which provides a set of detector-agnostic and highly performant tracking algorithms that have demonstrated promising performance for a few high-energy physics and nuclear physics experiments.

关键词： BESⅢtracking detector CMOS pixel sensor Track reconstruction Common tracking software

Effect of in ovo zinc injection on the embryonic development, tissue zinc contents, antioxidation, and related gene expressions of broiler breeder eggs

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Journal of Integrative Agriculture 2018年第3期17卷 648-656页

作者： SUN xiao-ming liAO Xiu-dong LU lin zhang li-yang MA Qiu-gang XI lin luo Xu-gang Mineral Nutrition Research Division Institute of Animal Science Chinese Academy of Agricultural Sciences College of Animal Science and Technology China Agricultural University Department of Animal Science North Carolina State University

Two experiments were conducted to investigate the effect of in ovo zinc （Zn） injection on the embryonic development, tissue Zn contents, antioxidation and related gene expressions of fertilized eggs of Arbor Acres broiler breeders. Experiment 1 was conducted to determine an optimal embryonic age for early in ovo injection. A total of 720 fertilized eggs with similar weights were randomly allotted to 4 treatments with 6 replicates per treatment and 30 eggs per replicate in a completely randomized design. The eggs were injected with 0.1 mL sterilized water at 3, 6 and 9 embryonic days of incubation （E3, E6 and E9） or non-injection （the control）, respectively. The results from experiment 1 showed that E3 and E6 injections increased （P〈0.05） the embryonic mortalities, and decreased （P〈0.05） hatchabilities compared to the non-injected control, but no differences （P〉0.05） between E9 injection and the non-injected control were observed in either embryonic mortality or hatchability. The findings suggest that the E9 is the optimal embryonic age for early in ovo injection. In experiment 2, a total of 672 fertilized eggs with similar weights were randomly allocated to 7 treatments with 6 replicates per treatment and 16 eggs per replicate in a completely randomized design. The eggs were injected with 0 （the negative control）, 50, 100, 150, 200, or 250 μg Zn/egg as reagent grade ZnSO4.7H20 in a 0.1-mL solution, or non-injection （the positive control）, respectively at E9-10. The results from the experiment 2 demonstrated that no differences （P〉0.05） among 50 and 100 μg Zn/egg groups and the negative control were observed in the embryonic mortality and hatchability, however, the injection of 200 μg Zn/egg increased （P〈0.05） the embryonic mortality, and injections of 150 and 200 μg Zn/egg decreased （P〈0.05） hatchabilities compared with the controls. The embryonic tibia Zn contents at E20 were increased （P〈0.05） by injections of 150, 200 and 250μg Zn/egg. Zinc injection did not affe

关键词： in ovo injection zinc embryonic development gene expression broiler breeder egg

Electronic-scale assessment of high-temperature oxidation mechanisms in a novel Fe-based alloy

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Journal of Iron and Steel Research International 2024年第4期31卷 982-997页

作者： Wei-di luo Ting-ping Hou Xuan liang dong zhang Heng-fu lin Yu li Tian-liang Zhao Cheng-yang Hu Serhii Yershov kai-ming Wu The State Key Laboratory of Refractories and Metallurgy.Wuhan University of Science and Technology.Wuhan 430081 HubeiChina Hubei Province Key Laboratory of Systems Science in Meallurgial Process Wuhan University of Science and Technology.Wuhan 430081.Hubei.China International Research Institute for Steel Technology Wuhan University of Science and Technology.Wuhan 430081.HubeiChina Collaborative Innovation Center for Advanced Steels w uhan University of Science and Technology.Wuhan 430081.HuleiChina

The development of alloys with high antioxidation performance is limited by the ambiguous details of the oxidation ***,based on the structures of internal oxides detected by high-resolution transmission electron microscopy,a hybrid method combining first-principles calculation,climb image nudged elastic band method and quasi-harmonic Debye model has been implemented to explain the oxidation mechanism with an emphasis on the origin of delamination and *** results showed that the delamination of oxides corresponds to the acceleration of diffusion of Cr element caused by lamellar *** reduction in the cracking occurrence at high temperature mainly results from the smaller bulk modulus of ***,the stronger chemical bonds promoted by lamellar structures also correspond to the higher crackingresistance.

关键词： Oxidation Crystal structure Diffusion Cracking-First-principles calculation

Effects of clonal integration and nitrogen supply on responses of a clonal plant to short-term herbivory

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Journal of Plant Ecology 2019年第4期12卷 624-635页

作者： Bi-Cheng dong li-Min zhang kai-Yu li xiao-Ting Hu Pu Wang Yong-Jian Wang Fang-li luo Hong-li li Fei-Hai Yu School of Nature Conservation Beijing Forestry UniversityBeijing 100083China Institute of Botany Chinese Academy of SciencesBeijing 100093China College of Horticulture and Forestry Sciences Huazhong Agricultural UniversityWuhan 430070China Institute of Wetland Ecology&Clone Ecology/Zhejiang Provincial Key Laboratory of Plant Evolutionary Ecology and Conservation Taizhou UniversityTaizhou 318000China

Aims Clonal integration,*** sharing between interconnected ramets,can help clonal plants tolerate abiotic ***,few studies have directly examined the ecological significance of clonal integration in the ability of clonal plants to tolerate biotic stress such as *** We grew clonal fragments of an invasive clonal plant Alternanthera philoxeroides,each consisting of an apical part(relatively young)and a basal part(relatively old),at two levels(low and high)of soil nitrogen(N).For each fragment,the apical part was subjected to either no herbivory or herbivory for 2 weeks by a specialist insect,Agasicles hygrophila,and was either connected with or discon-nected from the basal part not subjected to *** Findings Herbivory in the apical part severely reduced leaf growth(leaf mass,leaf number or leaf area)and ramet production of both apical and basal parts,and increased root to shoot ratio of the apical *** of herbivory and soil N,stem connection between the apical and the basal part decreased root to shoot ratio of the ap-ical part,but did not change its growth ***,con-nection increased stem N concentration of the apical part growing under high-N supply and decreased stem carbon(C)concentration of the apical part under low-N *** contrast,connection in-creased root to shoot ratio of the basal part,but reduced its leaf and ramet *** also increased leaf and stem C concentrations of the basal part under low-N ***,clonal integration can be beneficial for the early development of young *** ramets,but not for their local adaptation to herbivory damage by ***.

关键词： Agasicles hygrophila Alternanthera philoxeroides foliar herbivory invasive species physiological integration

Dynamic transcriptional atlas of male germ cells during porcine puberty

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Zoological Research 2022年第4期43卷 600-603页

作者： ling-kai zhang Hai-dong Ma ming Guo ling Wang Yi Zheng xiao-dong Wu Tian-Jiao li Hong-Zhao Lu Wen-Xian Zeng Tao zhang School of Biological Science and Engineering Shaanxi University of TechnologyHanzhongShaanxi 723001China College of Animal Science and Technology Northwest A&F UniversityYanglingShaanxi 712100China

DEAR EDITOR,Spermatogenesis is the process by which male gametes are formed from spermatogonial stem cells(SSCs)and it is essential for the reliable transmission of genetic information between *** birth,prospermatogonia(ProSG)give rise to *** mouse spermatogenesis is relatively well studied,we are only just beginning to unravel this process in larger ***,we analyzed key developmental transitions and differentiation trajectories by profiling neonatal,juvenile,and adult testes through single-cell sequencing(scRNA-seq).We found that SSCs were established at 30 days old,and that CDH1 was a novel cell surface marker for porcine ProSG and undifferentiated spermatogonia.

关键词： neonatal Dynamic birth