|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Animating Chinese ink painting through generating reproducible brush strokes显示文摘By generating reproducible brush strokes of Chinese ink painting,we propose an image-based tool for lively displaying real painting process of Chinese ink painting.Contrasted with previous work where the brush trajectory is explicitly specified as manual input,we automatically extract this trajectory from the outlines of the shapes to paint and model the brush footprints;first complex shape of an input image is decomposed into brush strokes.Second,we estimate the brush trajectory with shape outline and build a brush footprint model to measure the quality of the trajectory constrained by the variation along a stroke of the painting process parameters,such as location,size,and orientation of the footprints.Finally,with our real-time rendering model,the estimated trajectories are dynamically rendered into brush strokes by mapping footprint textures sampled from the input images.It is particularly useful for analysis and appreciation of Chinese ink painting,as well as for art practice and education. | YANG LiJie XU TianChen | 2013 | Science China(Information Sciences)2013，56，1： | 5 |
| 2 | Topology optimization of plate structures using plate element-based moving morphable component(MMC)approach显示文摘A topology optimization approach for designing the layout of plate structures is proposed in this article.In this approach,structural mechanical behavior is analyzed under the framework of Kirchhoff plate theory,and structural topology is described explicitly by a set of moving morphable components.Compared to the existing treatments where structural topology is generally described in an implicit manner,the adopted explicit geometry/layout description has demonstrated its advantages on several aspects.Firstly,the number of design variables is reduced substantially.Secondly,the obtained optimized designs are pure black-and-white and contain no gray regions.Besides,numerical experiments show that the use of Kirchhoff plate element helps save 95-99%computational time,compared with traditional treatments where solid elements are used for finite element analysis.Moreover the accuracy of the proposed method is also validated through a comparison with the corresponding theoretical solutions.Several numerical examples are also provided to demonstrate the effectiveness of the proposed approach. | Tianchen Cui Zhi Sun Chang Liu Linyuan Li Ronghua Cui Xu Guo | 2020 | Acta Mechanica Sinica2020，36，2： | 4 |
| 3 | An Optimization Approach for Stiffener Layout of Composite Stiffened Panels Based on Moving Morphable Components(MMCs)显示文摘An explicit topology optimization method for the stiffener layout of composite stiffened panels is proposed based on moving morphable components(MMCs).The skin and stiffeners are considered as panels with different bending stiffnesses,with the use of equivalent stiffness method.Then the location and geometric properties of composite stiffeners are determined by several MMCs to perform topology optimization,which can greatly simplify the finite element model.With the objective of maximizing structural stiffness,several typical cases with various loading and boundary conditions are selected as numerical examples to demonstrate the proposed method.The numerical examples illustrate that the proposed method can provide clear stiffener layout and explicit geometry information,which is not limited within the framework of parameter and size optimization.The mechanical properties of composite stiffened panels can be fully enhanced. | Zhi Sun Ronghua Cui Tianchen Cui Chang Liu Shanshan Shi Xu Guo | 2020 | Acta Mechanica Solida Sinica2020，33，5： | 2 |
| 4 | Explicit Topology Optimization with Moving Morphable Component(MMC)Introduction Mechanism显示文摘In this article,an explicit topology optimization approach with components-growing ability is proposed under the moving morphable component(MMC)framework.In this approach,the shape and topology layout of structures are explicitly optimized by growth evolution of moving morphable components.To this end,a competition criterion is developed to optimize the structural layout from two options:adding several new components or changing the current layout.In addition,some numerical technqiues are also developed to preserve the stability of the iterative process.The present topology optimization approach allows rational generation of new components and does not require a specific distribution of components in the initial design,which is compulsory for the conventional MMC method.Three numerical examples are provided to illustrate the effectiveness of the proposed method.The optimization results indicate that the proposed method does have the potential to improve the existing MMC-based explicit topology optimization framework by eliminating the initial design dependency of optimal solutions. | Tianchen Cni Zongliang Du Chang Liu Zhi Sun Xu Guo | 2022 | Acta Mechanica Solida Sinica2022，35，3： | 2 |
| 5 | Present-day movement characteristics of the Qinghai Nanshan fault and its surrounding area from GPS observation显示文摘The Qinghai Nanshan fault is a larger fault in the Northeastern Xizang Plateau.In previous studies,its movement characteristics are mainly investigated with geological and seismic observations,and the tectonic transformation role of the fault on its east is not yet clear.This study uses data fusion to obtain denser GPS observations near the Qinghai Nanshan fault.Based on tectonic characteristics,we establish a block model to investigate the fault slip rate,locking degree,and slip deficit.The results show that the Qinghai Nanshan fault slip rate is characterized by sinistral and convergent movement.Both the sinistral and convergent rates display a decreasing trend from west to east.The locking degree and slip deficit are higher in the western segment(with an average of about 0.74 and 1.1 mm/a)and lower in the eastern segment.Then,we construct a strain rate field using GPS observations to analyze the regional strain characteristics.The results indicate that along the fault,the western segment shows a larger shear strain rate and negative dilation rate.Regional earthquake records show that the frequency of earthquakes is lower near the fault.The joint results suggest that the western segment may have a higher earthquake risk.In addition,the insignificant fault slip rate in the eastern segment may indicate that it does not participate in the tectonic transformation among the Riyueshan,Lajishan,and West Qinling faults. | Yang Liu Yuxuan Qiu Jialiang Liu Luyun Xiong Caijun Xu Jianghui Geng Gang Zheng Tianchen Sheng | 2024 | Geodesy and Geodynamics2024，15，2： | 0 |
| 6 | Revealing the frequency-dependent oscillations in the nonlinear terahertz response induced by the Josephson current显示文摘Nonlinear responses of superconductors to intense terahertz radiation has been an active research frontier.Using terahertz pump-terahertz probe spectroscopy,we investigate the c-axis nonlinear optical response of a high-temperature superconducting cuprate.After excitation by a single-cycle terahertz pump pulse,the reflectivity of the probe pulse oscillates as the pump-probe delay is varied.Interestingly,the oscillatory central frequency scales linearly with the probe frequency,a fact widely overlooked in pump-probe experiments.By theoretically solving the nonlinear optical reflection problem on the interface,we show that our observation is well explained by the Josephson-type third-order nonlinear electrodynamics,together with the emission coefficient from inside the material into free space.The latter results in a strong enhancement of the emitted signal whose physical frequency is around the Josephson plasma edge.Our result offers a benchmark for and new insights into strong-field terahertz spectroscopy of related quantum materials. | Sijie Zhang Zhiyuan Sun Qiaomei Liu Zixiao Wang Qiong Wu Li Yue Shuxiang Xu Tianchen Hu Rongsheng Li Xinyu Zhou Jiayu Yuan Genda Gu Tao Dong Nanlin Wang | 2023 | National Science Review2023，10，11： | 0 |
| 7 | Sketch-based stroke generation in Chinese flower painting显示文摘Dear editor,Flower painting,which is one of the major categories of Chinese painting,represents the key artistic characteristics of oriental paintings.In other words,its typical usages of stroke and ink color contribute to the unique appeal of Chinese painting,since the strokes may be straight or curved,hard or soft,thick or thin,pale or dark,and the ink colors may be dry or running,blending or diffusing.Therefore,the complexity and variety | Lijie YANG Tianchen XU Jixiang DU Enhua WU | 2016 | Science China(Information Sciences)2016，59，7： | 0 |
| 8 | The simulation research for transient current variation in short circuit fault of urban rail transportation显示文摘 | XU Chaoqun YANG Jian YUAN Tianchen | 2017 | International English Education Research2017，，5： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员