检索结果-南通市图书馆

State of the Art on Deep Learning-enhanced Rendering Methods

在线全文

学校读者我要写书评

暂无评论

Machine Intelligence Research 2023年第6期20卷 799-821页

作者： Qi Wang Zhihua zhong Yuchi huo Hujun Bao Rui Wang State Key Laboratory of CAD&CG Zhejiang UniversityHangzhou310058China Zhejiang Laboratory Hangzhou311121China

Photorealistic rendering of the virtual world is an important and classic problem in the field of computer *** the development of GPU hardware and continuous research on computer graphics,representing and rendering virtual scenes has become easier and more ***,there are still unresolved challenges in efficiently rendering global illumination *** the same time,machine learning and computer vision provide real-world image analysis and synthesis methods,which can be exploited by computer graphics rendering *** learning-enhanced rendering combines techniques from deep learning and computer vision into the traditional graphics rendering pipeline to enhance existing rasterization or Monte Carlo integration *** state-of-the-art report summarizes recent studies of deep learning-enhanced rendering in the computer graphics ***,we focus on works of renderers represented using neural networks,whether the scene is represented by neural networks or traditional scene *** works are either for general scenes or specific scenes,which are differentiated by the need to retrain the network for new scenes.

关键词： Neural rendering computer graphics scene representation rendering post-processing

Control on Crystal Forms of Ultrafine Barium Carbonate Particles and Study on its Mechanism

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Structural Chemistry 2005年第11期24卷 1290-1297页

作者： huo Ji-Chuan LIU Shu-Xin YANG Ding-Ming WANG hai-Bin Institute of Materials Science and Engineering Southwest University of Science and Technology Mianyang 621010 China

Barium carbonate particles were prepared by using homogeneous precipitation method and co-precipitation method respectively. Through adding different crystalline controlling modifiers, Barium carbonate particles in five different shapes including linear, needle-like, pillarlike, sphere-like and dumbbell-like were synthesized. These particles were characterized by SEM and XRD, and their synthetic mechanism was discussed in this paper.

关键词： barium carbonate crystalline controlling synthesis mechanism

Kinetics Analysis on the Polycondensation Process of Poly(p-phenylene terephthalamide):Experimental Verification and Molecular Simulation

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Polymer Science 2018年第5期36卷 675-682页

作者： Jing Liu hai-Juan Kong Yu Ma Shu Zhu Mu-huo Yu State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and Engineering Donghua University School of Materials Engineering Shanghai University of Engineering Science Key Laboratory of Shanghai City for Lightweight Composites State Key Laboratory for Modification of Chemical Fibers and Polymer Materials Donghua University

The conventional low-temperature method of solution polycondensation was developed to realize the reaction of p-phenylenediamin and terephthaloyl chloride for the preparation of poly（p-phenylene terephthalamide）（PPTA）. Some main factors influencing this process were investigated to determine the optimum condition for high molecular weight. Experiment showed significant slowing of the reaction and gradual deviation of second-order reaction kinetics due to diffusion control. These phenomena were studied theoretically via dynamic Monte Carlo simulation. A concise expression,n～c0^-0.88·t^0.37, was proposed to describe the diffusioncontrolled polycondensation process as a function of the monomer concentration and reaction time. The theoretical results provided a good description of diffusion-effected kinetics for the polycondensation process of PPTA, and demonstrated good agreement with the experimental data. Some differences of scaling relations between model and experiment results were also discussed.

关键词： Poly(p-phenylene terephthalamide) Molecular weight Reaction kinetics Molecular simulation

Numerical simulation of fluid flow and alloy melting in RH process for electrical steels

在线全文

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research International 2022年第9期29卷 1423-1433页

作者： haijun Wang Rui Xu hai-tao Ling Wei zhong Li-zhong Chang Sheng-tao Qiu Anhui Province Key Laboratory of Metallurgical Engineering and Resources Reeyeling Anhui University of TechnologyMa'anshan 243002AnhuiChina School of Metalurgical Engineering Anhui University of Technology.Ma'anshan 243002AnhuiChina State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China Xinyu Iron and Steel Co. Ltd.Xinyu 338001JiangxiChina National Engineering and Research Centerfor Continuous Casting Technology Central Iron and Steel Research InstituteBeijing 100081China

Based on the Eulerian-Lagrangian approach,a mathematical model was established to describe the gas-liquid flow behavior in the Ruhrstahl-Heraeus(RH)*** momentum source and the turbulent kinetic energy source due to the motion of gas bubbles were considered for the liquid *** effect of the expansion of gas bubbles on the liquid velocity,recirculation rate,and mixing time was quantitatively *** the fluid flow reached the steady state,the melting and mixing processes of aluminum alloys in the RH degasser were also *** results indicate that the expansion of gas bubbles has a significant infuence on the recirculation rate and the mixing time in the RH *** the superheat of liquid steel and decreasing the initial diameter of alloy particles are beneficial to promote the melting and mixing of alloy *** to the existence of solidified steel shells,the maximum diameter of the alloy particle is about 1.5 times its initial diameter.

关键词： Discrete particle model Multiphase flow Gas expansion-Mixing time Alloy melting Numerical simulation

Optimization of Safety Production Supervision Mode of Coalmining Enterprises

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of China University of Mining and Technology 2005年第4期15卷 348-353页

作者： ZHOU Min XIAO zhong-hai School of Management China University of Mining ＆ Technology Xuzhou Jiangsu 221008 China

In view of the fact that safety production supervision of coal mines in China features low efficacy, this paper applies principles of cybernetics to simulate the dynamic process of safety supervision, and proposes that institutional variables be controlled to support intermediate goals, which in turn contribute to the ultimate safety production objective. Rather than focusing all attention on safety issues of working faces, supervising departments of coalmines are advised to pay much more attention to institutional factors that may impact people’s attitude and behavior, which are responsible for most coalmine accidents. It is believed that such a shift of attention can effectively reduce coalmining production accidents and greatly enhance supervision efficacy.

关键词： supervision mode control model supervision efficacy conducting mechanism

Transition to Amplitude Death in Coupled System with Small Number of Nonlinear Oscillators

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2009年第3期51卷 460-464页

作者： CHEN hai-Ling YANG Jun-zhong School of Science Beijing University of Posts and Telecommunications Beijing 100876 China

In this work, we investigate the amplitude death in coupled system with small number of nonlinear oscillators. We show how the transitions to the partial and the complete amplitude deathes happen. We also show that th... 详细信息

关键词： coupled nonlinear oscillators amplitude death phase synchronization

A U(4)QCD Model Using Generalized Yang-Mills Theory

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2008年第9期50卷 703-706页

作者： WANG Dian-Fu zhong hai-Yang Department of Physics Dalian Maritime University Dalian 116026 China

Generalized Yang-Mills theory has a covariant derivative which contains both vector and pseudoscalargauge *** on this theory,we construct a U(4) strong interaction model By using this U(4) generalizedYang-Mills model,we obtain that mesons can be realized as the colorless pseudoscalar gauge *** also obtain agauge potential solution which can be used to explain the asymptotic behavior and color confinement.

关键词： QCD model Yang-Mills theory

Characterization of metal doped-titanium dioxide and behaviors on photocatalytic oxidation of nitrogen oxides

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2007年第12期19卷 1505-1509页

作者： LIU Yue WANG hai-qiang WU zhong-biao Department of Environmental Engineering Zhefiang University Hangzhou 310027 China.

A series of nanosized ion-doped TiO2 catalysts with different ion content （between 0.1 at.% and 1.0 at.%） have been prepared by wet impregnation method and investigated with respect to their behavior for UV photocatalytic oxidation of nitric oxide. The catalytic activity was correlated with structural, electronic and surface examinations of the catalysts using X-ray diffraction analysis （XRD）, ultraviolet-visible （UV-Vis） absorption spectroscopy, transmission electron microscopy （TEM）, energy disperse spectrometer （EDS） and high resolution-transmission electron microscopy （HR-TEM） techniques. An enhancement of the photocatalytic activity was observed for Zn2＋ doping catalyst ranged from 0.1 at.% to 1.0 at.% which was attributed to the lengthened lifetime of electrons and holes. The improvement in photocatalytic activity could be also observed with the low doping concentration of Cr^3＋（0.1 at.%）. However, the doping of Fe^3＋, Mo^6＋, Mn^2＋ and the high doping concentration of Cr^3＋ had no contribution to photocatalytic activity of nitric oxide.

关键词： NO photocatalytic oxidation ion doping doped

Simultaneous two-way classical communication and measurement-deviceindependent quantum key distribution on oceanic quantum channels

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2022年第12期74卷 21-34页

作者： Hongyang Hu hai zhong Wei Ye Ying Guo School of Automation Central South UniversityChangsha 410083China School of Computer Science and Engineering Central South UniversityChangsha 410083China

Simultaneous two-way classical and quantum(STCQ)communication combines both continuous classical coherent optical communication and continuous-variable quantum key distribution(CVQKD),which eliminates all detection-related imperfections by being measurement-device-independent(MDI).In this paper,we propose a protocol relying on STCQ communication on the oceanic quantum channel,in which the superposition-modulation-based coherent states depend on the information bits of both the secret key and the classical communication *** analyse the encoding combination in classical communication and consider the probability distribution transmittance under seawater turbulence with various interference *** numerical simulations of various practical scenarios demonstrate that the proposed protocol can simultaneously enable two-way classical communication and CV-MDI QKD with just a slight performance degradation transmission distance compared to the original CV-MDI QKD ***,the asymmetric situation outperforms the symmetric case in terms of transmission distance and optical modulation *** further take into consideration the impact of finite-size effects to illustrate the applicability of the proposed scheme in practical *** results show the feasibility of the underwater STCQ scheme,which contributes toward developing a global quantum communication network in free space.

关键词： continuous-variable quantum key distribution measurement-device-independent simultaneous oceanic turbulence channel transmittance