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Let’s all dance:Enhancing amateur dance motions

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Computational Visual Media 2023年第3期9卷 531-550页

作者： Qiu Zhou Manyi Li qiong zeng Andreas Aristidou Xiaojing zhang Lin Chen Changhe Tu School of Computer Science&Technology Shandong UniversityQingdao 266000China School of Software Shandong UniversityJinan 250101China Department of Computer Science University of CyprusNicosia 1678Cyprus CYENS Centre of Excellence Nicosia 1016Cyprus Qingdao Institute of Humanities and Social Sciences Shandong UniversityQingdao 266000China.

Professional dance is characterized by high impulsiveness,elegance,and aesthetic *** order to reach the desired professionalism,it requires years of long and exhausting practice,good physical condition,musicality,but also,a good understanding of *** dance motions and transferring them to digital avatars is commonly used in the film and entertainment ***,so far,access to high-quality dance data is very limited,mainly due to the many practical difficulties in capturing the movements of dancers,making it prohibitive for largescale data *** this paper,we present a model that enhances the professionalism of amateur dance movements,allowing movement quality to be improved in both spatial and temporal *** model consists of a dance-to-music alignment stage responsible for learning the optimal temporal alignment path between dance and music,and a dance-enhancement stage that injects features of professionalism in both spatial and temporal *** learn a homogeneous distribution and credible mapping between the heterogeneous professional and amateur datasets,we generate amateur data from professional dances taken from the AIST++*** demonstrate the effectiveness of our method by comparing it with two baseline motion transfer methods via thorough qualitative visual controls,quantitative metrics,and a perceptual *** also provide temporal and spatial module analysis to examine the mechanisms and necessity of key components of our framework.

关键词： animation music-to-motion alignment dance motion enhancement dance motion analysis

Study on oxygen transport and titanium oxidation in coating cracks under parallel gas flow based on LBM modelling

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Chinese Journal of Chemical Engineering 2023年第4期56卷 15-24页

作者： Shengfeng Luo song zhang Yiping zeng Hui zhang Lili Zheng Zhaopeng Xu Department of Engineering Physics Tsinghua UniversityBeijing 100084China Department of Mechanics and Aerospace Engineering Southern University of Science and TechnologyShenzhen 518055China Institute for Aero Engine Tsinghua UniversityBeijing 100084China Shenzhen Smart Hua Information Technology Research Co. Ltd.Shenzhen 518000China School of Aerospace Engineering Tsinghua UniversityBeijing 100084China Chinese Academy of Agricultural Mechanization Sciences Beijing 100084China

The oxygen transportation from surrounding air to coating cracks is an important factor in the oxidation and ignition of titanium alloy. In this work, the oxygen transport and surface oxidation of titanium in inclined cracks of coating under parallel airflow are studied with the lattice Boltzmann method(LBM).A boundary scheme of LBM about surface reaction is developed. The conversion factors are utilized to build the relationship between the physical scale and the lattice scale. The reliability of the LBM model is validated by the finite element method(FEM). The results show that the convective mass transport driven by the surrounding airflow and the vortex structure formed inside the crack are the two significant factors that influence the oxygen transport in cracks. The convective mass transfer plays a major role in oxygen transport when the inclination angle of the crack is small. For the cases with a large inclination angle, the oxygen transfer from the top to the bottom of the crack is mainly controlled by mass diffusion mechanism. The oxygen concentration in inclined cracks is generally less than that in vertical cracks, and oxidation and ignition of the substrate titanium might be more likely to occur in relatively vertical cracks.

关键词： Coating crack Oxidation Transport Ignition Numerical simulation

Simulation of the erosion of casing and perforation under staged sand fracturing conditions in horizontal sections

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Journal of Hydrodynamics 2022年第4期34卷 725-743页

作者： Bao-cheng Wu Si-song zhang Jian-min Li Yu-ting Pan De-zhi zeng Hui-yong Yu Hong-jun Zhu Research Institute of Engineering Technology PetroChina Xinjiang Oilfield CompanyKaramay 834000China State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Southwest Petroleum UniversityChengdu 610500China

The new fracturing technology of intensive stages and high-intensity proppant injection shows significant advantages of cost reduction and high efficiency in the volume fracturing of unconventional reservoirs,but it also intensifies the erosion of the casing and the perforations,with a perforation diameter expansion and the casing wall *** solve this problem,in view of the applications of the perforation fracturing technology under the construction conditions in Mahu Area in Xinjiang,China,the structure parameters of the downhole strings are measured and a calculation model of the perforation casing erosion is established for the large-displacement sand fracturing process in horizontal *** software ANSYS-FLUENT is used to simulate the casing and perforation erosion under different conditions of the displacement,the sand content,the proppant particle size,and the fracturing fluid viscosity in the sand fracturing *** particle size of the proppant and the viscosity of the fracturing fluid mainly affect the erosion area,but they have little influence on the erosion *** sand content and the displacement significantly affect the erosion *** these factors,the sand content has a more significant effect on the erosion rate and the displacement has a more significant effect on the erosion *** to the influence of gravity,the perforation erosion rate is larger when the phase angle ranges from 120°to 240°.

关键词： Sand fracturing erosion numerical simulation perforated casing solid-liquid flow

Mechanical Properties, Crystallization and Biodegradation Behavior of the Polylactide/Poly(3-hydroxybutyrate-co-4-hydroxybutyrate)/ Poly(butylene adipate-co-terephthalate) Blown Films

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Chinese Journal of Polymer Science 2020年第10期38卷 1072-1081,I0005页

作者： Xiang-Yu Wang Hong-Wei Pan Shi-ling Jia zeng-Wen Cao Li-Jing Han Hui-Liang zhang Li-song Dong Key Laboratory ofPolymer Ecomaterials Chinese Acadermy of SciencesChangchun Istitute of Applied ChemistryChangchun 130022 China University of Science and Technology of China Hefei 230026 China Zhejiang Zhongke Applied Chemistry Technology Co LtdHangzhou 30000 China

Polactide(PLA),poly(3-hydroxybutyrate-co-4-hydroxybutyrate)(P(3HB-CO-4HB)),and poly(butylene adipate co-terephthalate)(PBAT)ternary blends were prepared by extrusion *** biodegradable PLA/P(3HB-co 4HB)/PBAT films were successfully obtained by using blown films *** siffness-toughness balance was achieved for 55/10/35 PLA/P(3HB-co 4HB)/PBAT *** tensile strength reached 33.0 MPa(MD)and 23.5 MPa(TD).the elongation at break exceeded 1309%,and tear strength exceeded 110 kN/*** Young's modulus as low as about 1800 MPa also met packaging *** observations revealed rough and long ligaments,indicating that the tear specimens were broken *** addition of PBAT elastomers was the main reason for the improved toughness of the *** DMA and SEM analysis,it was demonstrated that PLA P(3HB co 4HB),and PBAT were prilly *** increasing P(3HB CO-4HB)content,the melt and cold crstallization of PLA was *** enzymatic degradation experiments indicated that the films had good *** findings gave important implications for designing and manufacturing biodegradation package of high biological carbon content.

关键词： Polylactide Poly(3 hydroxybutyrate co4-hydrxybutyrate) Blown flms Mechanical properties Biodegradability

Lactate Decreases Bortezomib Sensitivity and Predicts Poor Clinical Outcomes of Multiple Myeloma

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Current Medical Science 2023年第4期43卷 679-688页

作者： Na-ya MA qiong LI Xin-lei LI Yun-jing zeng De-zhi HUANG Yi-shuo DUAN Jing XIA Bang-dong LIU ling-yi RAO Jun RAO Xi zhang Medical Center of Hematology Xinqiao HospitalArmy Medical UniversityChongqing 400037China State Key Laboratory of Trauma Burns and Combined InjuryArmy Medical UniversityChongqing 400037China National Clinical Research Center for Hematologic Diseases First Affiliated Hospital of Soochow UniversitySoochow 215031China

Objective:Metabolic disorders are regarded as hallmarks of multiple myeloma(MM)and are responsible for rapid cancer cell proliferation and tumor ***,the exact biological roles of metabolites in MM cells have not been fully *** study aimed to explore the feasibility and clinical significance of lactate for MM and investigate the molecular mechanism of lactic acid(Lac)in the proliferation of myeloma cells and cell sensitivity to bortezomib(BTZ).Methods:Metabolomic analysis of the serum was carried out to obtain metabolites expression and clinical characteristics in MM *** CCK8 assay and flow cytometry were used to detect cell proliferation,apoptosis,and cell cycle *** blotting was used to detect the potential mechanism and apoptosis-and cycle-related protein ***:Lactate was highly expressed in both the peripheral blood and bone marrow of MM *** was significantly correlated with Durie-Salmon Staging(DS Staging)and the International Staging System(ISS Staging)and the serum and urinary involved/uninvolved free light chain *** with relatively high lactate levels had a poor treatment ***,in vitro experiments showed that Lac could promote the proliferation of tumor cells and decrease the proportion of G0/G1-phase cells,which was accompanied by an increased proportion of S-phase *** addition,Lac could decrease tumor sensitivity to BTZ by disrupting the expression of nuclear factor kappa B subunit 2(NFκB2)and ***:Metabolic changes are important in MM cell proliferation and treatment response;lactate could be used as a biomarker in MM and as a therapeutic target to overcome cell resistance to BTZ.

关键词： lactate biomarker multiple myeloma bortezomib NF-kappa B pathway

Protein composition of extracellular vesicles from skin secretions of the amphibian Bombina maxima

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Zoological Research 2022年第4期43卷 687-690页

作者： Xue-song Wei ling-Zhen Liu Xian-ling Bian Lin zeng Wen-Hui Lee ling Lin Yun zhang Qi-Quan Wang Human Aging Research Institute and School of Life Science Nanchang Universityand Jiangxi Key Laboratory of Human AgingNanchangJiangxi 330031China Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences&Yunnan Province Kunming Institute of ZoologyChinese Academy of SciencesKunmingYunnan 650201China College of Life Sciences Anhui Normal UniversityWuhuAnhui 241000China Center for Excellence in Animal Evolution and Genetics Chinese Academy of SciencesKunmingYunnan 650201China Institutional Center for Shared Technologies and Facilities of the Kunming Institute of Zoology Chinese Academy of SciencesKunmingYunnan 650201China

DEAR EDITOR,Extracellular vesicles(EVs)are important for the transport of biologically active materials and for intercellular *** an exposed mucosa,amphibian skin participates in many essential physiological *** date,however,little is known about EVs in amphibian ***,we successfully isolated EVs from the skin secretions of Bombina maxima,and characterized the EVs using nanoparticle tracking,western blotting,and electron microscopy.

关键词： maxima vesicles secretion

Exploring the effect of a low-carbon city pilot policies on carbon dioxide emission intensity:Based on the PSM-DID method

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Chinese Journal of Population,Resources and Environment 2022年第3期20卷 209-216页

作者： yan song Xiulian Chen Zhenran Li zhiyuan zeng Ming zhang School of Economics and Management China University of Mining and TechnologyXuzhou221116China School of Economics and Management Xidian UniversityXi’an710126China School of Economics and Management Nanjing University of Aeronautics and AstronauticsNanjing210016China School of Economics Southwestern University of Finance and EconomicsChengdu611130China

In 2010,the National Development and Reform Commission launched the low-carbon city(LCC)pilot pro‐*** scope of the pilot program was then gradually expanded to address the dilemma concerning eco‐nomic development and low-carbon *** the second batch of LCCs in China,this study uses a combination of propensity score matching and difference-in-differences models to determine the effect of LCC pilot policies on CO_(2) emission *** also used the mediation effect model to further investigate its in‐ternal *** findings of the study are as ***,the LCC pilot policy plays an important role in reducing carbon ***,LCC pilots policies reduce CO_(2) emissions through intermediary paths of output adjustment and technological ***,our heterogeneity analysis reveals that cities with higher levels of economic growth and better levels of human capital have superior carbon emission reduction effects;lastly,non-resource-based cities have better carbon emission reduction effects.

关键词： Low-carbon city(LCC) Carbon emissions PSM-DID Output adjustment Technology innovation

Oxidation behavior of 4774DD1 Ni-based single-crystal superalloy at 980℃ in air

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China Foundry 2024年第2期21卷 116-124页

作者： Yu Fang Ya-zhou Li Qiang yang Qun-gong He Xiu-fang Gong Qian Duan Hai-yang song Fu Wang qiong-yuan zhang Hong zeng State Key Laboratory of Long-Life High Temperature Materials Dongfang Turbine Co.Ltd.Deyang 618000SichuanChina State Key Laboratory for Manufacturing System Engineering School of Mechanical EngineeringXi’an Jiaotong UniversityXi’an 710049China

The oxidation behavior of a novel Ni-based single-crystal 4774DD1 superalloy for industrial gas turbine applications was investigated by the isothermal oxidation at 980℃ and discontinuous oxidation weight gain *** phase constitution and morphology of surface oxides and the characteristics of the crosssection oxide film were analyzed by XRD,SEM and *** show that the oxidation kinetics of the 4774DD1 superalloy follows the cubic law,indicating its weak oxidation resistance at this *** the oxidation time increases,the composition of the oxide film evolves as following:One layer consisting of a bottom Al_(2)O_(3)sublayer and an upper(Al_(2)O_(3)+NiO)mixture sublayer after oxidized for 25 ***,two layers composed of an outermost small NiO discontinuous grain layer and an internal layer for 75 *** internal layer is consisted of the bottom Al_(2)O_(3)sublayer,an intermediate narrow CrTaO_(4)sublayer,and an upper(Al_(2)O_(3)+NiO)mixture *** two layers comprising an outermost relative continuous NiO layer with large grain size and an internal layer as the oxidation time increases to 125 *** internal layer is composed of the upper(Al_(2)O_(3)+NiO)mixture sublayer,an intermediate continuous(CrTaO_(4)+NiWO_(4))mixture sublayer,and a bottom Al_(2)O_(3)***,three layers consisting of an outermost(NiAl2O_(4)+NiCr2O_(4))mixture layer,an intermediate(CrTaO_(4)+NiWO_(4))mixture layer,and a bottom Al_(2)O_(3)layer for 200 h.

关键词： nickel-base single crystal superalloy oxidation kinetics oxide film microstructure mechanism

Spatio-temporal Variation of Soil Respiration and Its Driving Factors in Semi-arid Regions of North China

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Chinese Geographical Science 2018年第1期28卷 12-24页

作者： zeng Xinhua song Yigang zhang Wanjun HE Shengbing College of Environmental Science and Engineering Shanghai Jiaotong University Key Laboratory of Agricultural Water Resources Center for Agricultural Resources Research Institute of Genetics and Developmental Biology Chinese Academy of Sciences Shanghai Chenshan Plant Science Research Center Chinese Academy of Sciences

Soil respiration （SR） is the second-largest flux in ecosystem carbon cycling. Due to the large spatio-temporal variability of environmental factors, SR varied among different vegetation types, thereby impeding accurate estimation of CO2 emissions via SR. However, studies on spatio-temporal variation of SR are still scarce for semi-arid regions of North China. In this study, we conducted 12-month SR measurements in six land-use types, including two secondary forests （Populus tomentosa （PT） and Robinia pseudoacacia （RP））, three artificial plantations （Armeniaca sibirica （AS）, Punica granatum （PG） and Ziziphusjujuba （Z J）） and one natural grassland （GR）, to quantify spatio-temporal variation of SR and distinguish its controlling factors. Results indicated that SR exhibited distinct sea- sonal patterns for the six sites. Soil respiration peaked in August 2012 and bottomed in April 2013. The temporal coefficient of variation （CI0 of SR for the six sites ranged from 76.98% to 94.08%, while the spatial CV of SR ranged from 20.28% to 72.97% across the 12-month measurement. Soil temperature and soil moisture were the major controlling factors of temporal variation of SR in the six sites, while spatial variation in SR was mainly caused by the differences in soil total nitrogen （STN）, soil organic carbon （SOC）, net photosynthesis rate, and fine root biomass. Our results show that the annual average SR and Q10 （temperature sensitivity of soil respira- tion） values tended to decrease from secondary forests and grassland to plantations, indicating that the conversion of natural ecosystems to man-made ecosystems may reduce CO2 emissions and SR temperature sensitivity. Due to the high spatio-temporal variation of SR in our study area, care should be taken when converting secondary forests and grassland to plantations from the point view of accurately quantifying C02 emissions via SR at regional scales.

关键词： soil respiration spatio-temporal variation substrate availability temperature sensitivity global carbon cycle North China