Sample based 3D face reconstruction from a single frontal image by adaptive locally linear embedding   总被引：1，自引：0，他引：1  

ZHANG Jian ZHUANG Yue-ting 《浙江大学学报(A卷英文版)》2007,8(4):550-558

In this paper, we propose a highly automatic approach for 3D photorealistic face reconstruction from a single frontal image. The key point of our work is the implementation of adaptive manifold learning approach. Beforehand, an active appearance model (AAM) is trained for automatic feature extraction and adaptive locally linear embedding (ALLE) algorithm is utilized to reduce the dimensionality of the 3D database. Then, given an input frontal face image, the corresponding weights between 3D samples and the image are synthesized adaptively according to the AAM selected facial features. Finally, geometry reconstruction is achieved by linear weighted combination of adaptively selected samples. Radial basis function (RBF) is adopted to map facial texture from the frontal image to the reconstructed face geometry. The texture of invisible regions between the face and the ears is interpolated by sampling from the frontal image. This approach has several advantages: (1) Only a single frontal face image is needed for highly automatic face reconstruction; (2) Compared with former works, our reconstruction approach provides higher accuracy; (3) Constraint based RBF texture mapping provides natural appearance for reconstructed face.  相似文献   

3D graphical visualization of the genetic architectures underlying complex traits in multiple environments     

HU Cheng-cheng YE Xiu-zi ZHANG Yin YU Rong-dong YANG Jian ZHU Jun 《浙江大学学报(A卷英文版)》2007,8(4):563-567

An approach for generating interactive 3D graphical visualization of the genetic architectures of complex traits in multiple environments is described. 3D graphical visualization is utilized for making improvements on traditional plots in quan- titative trait locus (QTL) mapping analysis. Interactive 3D graphical visualization for abstract expression of QTL, epistasis and their environmental interactions for experimental populations was developed in framework of user-friendly software QTLNetwork (http://ibi.zju.edu.cn/software/qtlnetwork). Novel definition of graphical meta system and computation of virtual coordinates are used to achieve explicit but meaningful visualization. Interactive 3D graphical visualization for QTL analysis provides geneticists and breeders a powerful and easy-to-use tool to analyze and publish their research results.  相似文献   

Preparation and Photoconductivity of Fe-Phthalocyanine Derivation and C_(60) Composite Films     

CHEN Jian ming  ZHANG Jian cheng  SHEN Yue  LIU Xiu hong  YANG Lin hong School of Material Science  Engineering  Shanghai University  Shanghai    China 《上海大学学报(英文版)》2001,(2)

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Soundscape of the West Lake Scenic Area with profound cultural background—a case study of Evening Bell Ringing in Jingci Temple,China     

Jian GE  Min GUO  Miao YUE 《浙江大学学报(A卷英文版)》2013,14(3):219-229

From the case study of Evening Bell Ringing at Nanping Hill,one of the West Lake Cultural Landscapes in Hangzhou,China,we investigated the soundscape of a scenic area with a profound cultural background.First,we conducted the soundscape physical index of the area in both winter and spring seasons to analyze its objective graphical expression.Second,we focused on people’s reactions to the soundscape in order to obtain a subjective evaluation of each component in the soundscape and integrated environment.Then,the relationship between the objective data and the subjective evaluation was analyzed.Finally,the impacts of the natural environment,history,and cultural factors on the evaluation of the Jingci Temple soundscape were studied.It was found that natural sounds,cultural sounds,and historic sounds were widely acclaimed in people’s subjective feelings,which indicated the close relationships among historical and cultural background,soundscape,and natural environment.Thus,the conclusion was made that soundscape should be consistent with the local natural environment and the historical and cultural background.  相似文献   

Optimization design of the stratospheric airship’s power system based on the methodology of orthogonal experiment     

Jian LIU  Quan-bao WANG  Hai-tao ZHAO  Ji-an CHEN  Ye QIU  Deng-ping DUAN 《浙江大学学报(A卷英文版)》2013,14(1):38-46

The optimization design of the power system is essential for stratospheric airships with paradoxical requirements of high reliability and low weight. The methodology of orthogonal experiment is presented to deal with the problem of the optimization design of the airship’s power system. Mathematical models of the solar array, regenerative fuel cell, and power management subsystem (PMS) are presented. The basic theory of the method of orthogonal experiment is discussed, and the selection of factors and levels of the experiment and the choice of the evaluation function are also revealed. The proposed methodology is validated in the optimization design of the power system of the ZhiYuan-2 stratospheric airship. Results show that the optimal configuration is easily obtained through this methodology. Furthermore, the optimal configuration and three sub-optimal configurations are in the Pareto frontier of the design space. Sensitivity analyses for the weight and reliability of the airship’s power system are presented.  相似文献   

SMT车闻MES中飞针测试仪的数据分析和采集     

张沛泓  王松林  姜建国  黄战武  Sun Jian 《中国科技信息》2008,13(10):112-114

制造执行系统(Manufacturing Execution System,MES)在汽车、航空、烟酒等传统制造业中的应用已取得成效,但在电子电路表面贴装(Surface Mout Technology,SMT)生产中的应用还处于起步阶段.建立SMT车间的MES系统在国内还是处于领先水平.对SMT车间的关键设备进行实时制造数据采集是建立MES的基础,而数据分析是实现数据采集的前提.飞针测试仪是SMT生产线上重要的检测设备,本文在介绍了飞针测试的原理和测试流程的基础上,铪出了飞钎测试的数据采集方案和要求,通过举例详细地分析了飞针测试仪S20FP的测试文件和测试结果文件的数据格式.  相似文献   

Dynamic bandwidth allocation scheme for MCNS DOCSIS     

Chen Jian Qian Ying Chen Huimin Li Yingchun Chen Jianqiang 《上海大学学报(英文版)》1998,2(4):328-333

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3 = 1 + 2: how the divide conquered de novo protein structure prediction and what is next?     

Yaoqi Zhou  Thomas Litfin  Jian Zhan 《国家科学评论(英文版)》2023,(12):60-65

<正>Protein structure prediction has been a challenging problem for>60 years. Its progress has been considered incremental for the past 20 years until leaps were made by Alpha Fold that seemed to suddenly reach experimental accuracy. We argue that this unexpected success in 3D structure prediction was foreshadowed by prior advances in predicting 1D backbone structures and 2D side-chain distance maps in continuous angle and distance space as well as the embedding of these 1D and 2D featur...  相似文献   

High-efficiency nonlocal reflection-type vortex beam generation based on bound states in the continuumOA     

Tongyu Li  Jiajun Wang  Wenjie Zhang  Xinhao Wang  Wenzhe Liu  Lei Shi  Jian Zi 《国家科学评论(英文版)》2023,(5):201-207

Momentum-space polarization vortices centered at symmetry-protected bound states in the continuum of a periodic structure,e.g.photonic crystal slab,provide a novel nonlocal approach to generate vortex beams.This approach enjoys a great convenience of no precise alignment requirements,although the generation efficiency of the nonlocal generators requires further optimization before the practical application.In this work,we propose a temporal-coupled-mode-theory-based guideline for high-efficiency...  相似文献   

试论高职院校发展存在的问题及对策     

张健  Zhang Jian 《教育与职业》2007,(33):29-31

高职教育已经成为高等教育的重要组成部分,近年来,高职教育发展迅速,学校数量快速增长,办学规模迅速扩大,办学途径不断拓宽,必将对我国经济建设起到积极的推动作用。但在发展过程中仍然存在着诸如规模、质量、特色、投入机制、师资建设等方面的问题,只有解决好这些问题,才能促使高职院校持续、健康、快速发展。  相似文献