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Generating diverse clothed 3D human animations via a generative model

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Computational Visual Media 2024年第2期10卷 261-277页

作者： Min Shi Wenke Feng Lin gao Dengming Zhu School of Control and Computer Engineering North China Electric Power UniversityBeijing 102206China Institute of Computing Technology Chinese Academy of SciencesBeijing 100190China

Data-driven garment animation is a current topic of interest in the computer graphics *** approaches generally establish the mapping between a single human pose or a temporal pose sequence,and garment deformation,but it is difficult to quickly generate diverse clothed human *** address this problem with a method to automatically synthesize dressed human animations with temporal consistency from a specified human motion *** the heart of our method is a twostage ***,we first learn a latent space encoding the sequence-level distribution of human motions utilizing a transformer-based conditional variational autoencoder(Transformer-CVAE).Then a garment simulator synthesizes dynamic garment shapes using a transformer encoder-decoder *** the learned latent space comes from varied human motions,our method can generate a variety of styles of motions given a specific motion *** means of a novel beginning of sequence(BOS)learning strategy and a self-supervised refinement procedure,our garment simulator is capable of efficiently synthesizing garment deformation sequences corresponding to the generated human motions while maintaining temporal and spatial *** verify our ideas *** is the first generative model that directly dresses human animation.

关键词： Transformer garment animation conditional variational autoencoder(CVAE) computer graphics

Synthesis and Characterization of Niobium-doped TiO_2 Nanotube Arrays by Anodization of Ti-20Nb Alloys

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Journal of Materials Science & Technology 2012年第10期28卷 865-870页

作者： Zhengchao Xu Qi Li Shian gao Jianku Shangi Materials Center for Water Purification Shenyang National Laboratory for Materials ScienceInstitute of MetalResearchChinese Academy of SciencesShenyang 110016China Department of Materials Science and Engineering University of Illinois at Urbana-ChampaignUrbanaIL 61801USA

Well crystallized niobium-doped TiO; nanotube arrays （TiNbO-NT） were successfully synthesized via the anodization of titanium/niobium alloy sheets, followed with a heat treatment at 550 ℃ for 2 h. Morphology analysis results demonstrated that both the titanium/niobium alloy microstructure and the dissolution strength of electrolyte played major roles in the formation of nanotube structure. A single-phase microstructure was more favorable to the formation of uniform nanotube arrays, while modulating the dissolution strength of electrolyte was required to obtain nanotube arrays from the alloys with multi-phase microstructures. X-ray diffraction （XRD） and X-ray photoelectron （XPS） analysis results clearly demonstrated that niobium dopants （Nb^5＋） were successfully doped into TiO2 anatase lattice by substituting Ti^4＋ in this approach.

关键词： TiO2 Nanotube arrays Anodization Doping

Chirality transfer induced circularly polarized luminescence of achiral dye molecules by plasmonic nanohelicoid

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Nano Research 2024年第9期17卷 8408-8414页

作者： Han gao ChunLian Zhan Tianqi Zhao Jianzhong Zheng College of Optical and Electronic Technology China Jiliang UniversityHangzhou 310018China School of Environmental Science and Engineering Nanjing Tech UniversityNanjing 211816China

Optical materials with circularly polarized luminescence(CPL)features have attracted a growing interest due to their crucial role in biological sensing,display,spintronics,information storage,and so ***,CPL emissions in hybrid nanoparticle systems,in particular,chirality transfer induced CPL from chiral plasmonic nanoparticles,have rarely been explored due to a lack of effective bottom-up synthesis ***,we creatively take advantage of the newly introduced chiral plasmonic nanoparticles-gold nanohelicoid(GNH)to excite the CPL of achiral Rhodamine 6G(R6G).The fabricated GNH@R6G-SiO_(2)shows obvious CPL signals with|g_(lum)|up to *** with the single GNH,the photoluminescence(PL)dissymmetry factor of the single GNH@R6G-SiO_(2)is similar,but with 25 folds higher PL intensities under different circular *** research not only offers an effective and feasible method to fabricate single-particle level CPL-active materials,but also provides guidelines on how to regulate the CPL of achiral luminophores from chiral plasmonic nanostructures,thereby enlarging the category and quantity of CPL-active materials that can be applied for photonic technologies and visualization biosensing,especially some intracellular chirality related detection.

关键词： circularly polarized luminescence gold nanohelicoids chiral plasmonic

A decision tree based decomposition method for oil refinery scheduling

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Chinese Journal of Chemical Engineering 2018年第8期26卷 1605-1612页

作者： Xiaoyong gao Dexian Huang Yongheng Jiang Tao Chen Institute for Ocean Engineering China University of Petroleum Department of Automation Tsinghua University Department of Chemical and Process Engineering University of Surrey

Refinery scheduling attracts increasing concerns in both academic and industrial communities in recent ***, due to the complexity of refinery processes, little has been reported for success use in real world refineries. In academic studies, refinery scheduling is usually treated as an integrated, large-scale optimization problem,though such complex optimization problems are extremely difficult to solve. In this paper, we proposed a way to exploit the prior knowledge existing in refineries, and developed a decision making system to guide the scheduling process. For a real world fuel oil oriented refinery, ten adjusting process scales are predetermined. A C4.5 decision tree works based on the finished oil demand plan to classify the corresponding category(i.e. adjusting scale). Then,a specific sub-scheduling problem with respect to the determined adjusting scale is solved. The proposed strategy is demonstrated with a scheduling case originated from a real world refinery.

关键词： Refinery scheduling Decision tree C4.5 Decomposition method

Spatiotemporal characteristics of the expansion of an urban agglomeration and its effect on the eco-environment: Case study on the northern slope of the Tianshan Mountains

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Science China Earth Sciences 2019年第9期62卷 1461-1472页

作者： Chuanglin FANG Qian gao Xiaolei ZHANG Weiguo CHENG Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Beijing 100101 China College of Resources and Environmental Science Xinjiang University Urumqi 830046 China Xinjiang Institute of Ecology and Geography Chinese Academy of Sciences Urumqi 830011 China

Urban agglomerations, which are highly integrated urban groups, form during the advanced stages of industrialization and urban development. The urban agglomeration on the northern slope of the Tianshan Mountains is one of the 19 urban agglomerations promoted by China’s 13th Five-Year Plan and a key area of urbanization in Xinjiang. Based on remote sensing data, we analyzed the expansion of construction land in the urban agglomeration on the northern slope of the Tianshan Mountains and its effect on ecological value in 1980–2015. The results show that the expansion of construction land significantly affected ecological value in the study area over the past 35 years. Among land use types, grassland was the dominant contributor to changes in ecological value;its contribution rate reached 66.27% with an interannual variation of only 5%. The contribution rate of urban and rural residential land along with industrial and mining lands was very low(0.82%), while the interannual variation was large(86%). The area of construction land in the urban agglomeration expanded from 1,067 to 2,586 km^2, and the conversions of different land use types had different effects on ecological value. Among land use types, the conversions of lowcoverage grassland and dry land made the largest contributions to changes in ecological value. During the study period, a total of 1,685 km^2 of ecological land, 69.91% of which belonged to cultivated land and grassland, was converted into construction land.A total area of 1,082 km^2 of dry land and low-coverage grassland was converted into construction land, accounting for 64.21% of the total ecological land that was converted into construction land. In 2000–2015, the area of urban construction land increased significantly along with the proportion of unused land, including gobi(172 km^2), bare land(65 km^2), and salt-affected land(65 km^2), being converted into construction land. In contrast, the area of construction land that was converted into ecol

关键词： Urban agglomeration Tianshan Mountains Spatial expansion Temporal and spatial evolution Ecological environmental effect

Atmospheric Test and Numerical Models Assessment of Annular Combustor on ZK2000 Gas Turbine

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Journal of Thermal Science 2018年第6期27卷 516-526页

作者： WANG Weihao HUANG Weiguang CAO Yun gao Chuang Shanghai Advanced Research Institute Chinese Academy of Sciences Shanghai 201210 China University of Chinese Academy of Sciences Beijing 100049 China ShanghaiTech University Shanghai 201210 China Helan Turbines Co. Ltd Shanghai 210815 China

ZK2000 is a newly developed 2 MW all radial gas turbine with an annular combustor. In this paper, the authors present the atmospheric test results of the combustor on test rig. Evaluation of several RANS turbulence models and reaction models were used in order to determine which model was the most appropriate combination for comparison with the test results. FGM with SST were selected because of the better agreement with test results in terms of combustor temperature rise, primary zone temperature, liner metal temperature, and NO_x emission predictions.

关键词： lean premixed annular combustor low emission atmospheric test flamelet generated manifold

Uniaxial Ratcheting Behaviors of Metals with Different Crystal Structures or Values of Fault Energy: Macroscopic Experiments

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Journal of Materials Science & Technology 2011年第5期27卷 453-459页

作者： Guozheng Kang Yujie Liu Yawei Dong Qing gao State Key Laboratory of Traction Power Southwest Jiaotong University Chengdu 610031 China School of Mechanics and Engineering Southwest Jiaotong University Chengdu 610031 China

The uniaxial ratcheting behaviors of several metals with different crystal structures or values of fault energy were observed by the stress-controlled cyclic tests at room temperature. The prescribed metals included 316L stainless steel, pure copper, pure aluminum, and ordinary 20# carbon steel. The effects of applied mean stress, stress amplitude and stress ratio on the uniaxial ratcheting were also investigated. The observations show that different crystal structures or values of fault energy result in more or less different ratcheting behaviors for the prescribed metals. The different ratcheting behaviors are partially caused by the variation of dislocation mobility.

关键词： Ratcheting Uniaxial cyclic loading Crystal structure Fault energy

Improved genetic algorithm for nonlinear programming problems

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Journal of Systems Engineering and Electronics 2011年第3期22卷 540-546页

作者： Kezong Tang Jingyu Yang Haiyan Chen Shang gao School of Computer Science and Technology Nanjing University of Science and TechnologyNanjing 210094P.R.China School of Computer Science and Engineering Jiangsu University of Science and TechnologyZhenjiang 212003P.R.China

An improved genetic algorithm（IGA） based on a novel selection strategy to handle nonlinear programming problems is *** individual in selection process is represented as a three-dimensional feature vector which is composed of objective function value,the degree of constraints violations and the number of constraints *** is easy to distinguish excellent individuals from general individuals by using an individuals＇ feature ***,a local search（LS） process is incorporated into selection operation so as to find feasible solutions located in the neighboring areas of some infeasible *** combination of IGA and LS should offer the advantage of both the quality of solutions and diversity of *** results over a set of benchmark problems demonstrate that IGA has better performance than other algorithms.

关键词： genetic algorithm(GA) nonlinear programming problem constraint handling non-dominated solution optimization problem.

Design method of organizational structure for MAVs and UAVs heterogeneous team with adjustable autonomy

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Journal of Systems Engineering and Electronics 2018年第2期29卷 286-295页

作者： CHEN Jun QIU Xunjie RONG Jia gao Xiaoguang School of Electronics and Information Northwestern Polytechnical University Centre of Applied Informatics College of Engineering and Science Victoria University

The increasingly complex battlefield environment requests much closer connection in a team having both manned and unmanned aerial vehicles(MAVs and UAVs). This special heterogeneous team structure causes demands for effective organizational structure design solutions. Implementing adjustable autonomy in the organizational structure, the expected evaluation function is established based on the physical resource, intelligent resource, network efficiency, network vulnerability and task execution reliability. According to the above constraints, together with interaction latency, decision-making information processing capacity, and decision-making latency, we aim to find a preferential organizational structure. The proposed organizational structure includes cooperative relationships, supervisory control relationships, and decision-making authorization relationships. In addition,by considering the influence on the intelligent support capabilities and the task execution reliability created by adjustable autonomy, it helps to build the proposed organizational structure designed with certain degree of flexibility to deal with the potential changes in the unpredictable battlefield environment. Simulation is conducted to confirm our design to be valid. And the method is still valid under different battlefield environments and interventions.

关键词： organizational structure cooperative relationship supervisory control relationship decision-making authorization relationship adjustable autonomy