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43 results on '"Hu, Yafeng"'

2. Research on small sample probability relational degree model

Author

NING Xiaolei, WU Yingxia, ZHAO Xin, ZHAO Junmin, ZHANG Kai, HAO Tiaofeng, LYU Meibo, HU Yafeng, and CHEN Yun

Subjects
数据关联, 概率关联度, 小样本, 多元时间序列, 样本统计量, Motor vehicles. Aeronautics. Astronautics, TL1-4050
Abstract

针对小样本条件下多元时间序列之间的关联分析问题, 提出了一种小样本概率关联度模型。使用样本函数或样本统计量代替样本构造累积经验分布函数并计算概率关联系数。当比较序列样本容量n < 5, 使用样本顺序统计量的经验分布函数计算概率关联系数; 当比较序列样本容量n≥5, 使用Bootstrap方法重抽样扩充样本后再构造经验分布函数计算概率关联系数, 改进了概率关联度模型中关联系数的计算方法, 解决了小样本条件下这一类多元数据关联分析问题。证明了小样本概率关联度模型满足的基本性质, 给出了小样本概率关联分析的基本步骤, 仿真案例和实际应用验证了文中模型的正确性和有效性。

Published
2022
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11. Development of a high solid loading β-TCP suspension with a low refractive index contrast for DLP -based ceramic stereolithography

Author

Zhiliang Shi, Dai Honglian, Pengzhen Zhuang, Hu Yafeng, Ma Yule, and Huang Xiaolong

Subjects
010302 applied physics, Materials science, 02 engineering and technology, Bioceramic, 021001 nanoscience & nanotechnology, 01 natural sciences, Light scattering, law.invention, Rheology, law, visual_art, 0103 physical sciences, Materials Chemistry, Ceramics and Composites, visual_art.visual_art_medium, Refractive index contrast, Ceramic, Triply periodic minimal surface, Composite material, 0210 nano-technology, Suspension (vehicle), Stereolithography
Abstract

Digital light processing (DLP)-based ceramic stereolithography has recently been regarded as a promising method to produce bioceramic scaffolds because of its high processing accuracy. However, this process suffers from light scattering that can reduce its resolution. This study shows that a reactive monomer OPPEA (2-([1,1′-biphenyl]-2-yloxy) can weaken the light scattering in β-tricalcium phosphate (β-TCP) suspensions and increase the broadening depth by decreasing the refractive index contrast. Moreover, a β-TCP suspension with a low viscosity (5.76 Pa·s at 100 s−1), high solid loading (52 vol%) and high cure depth (>200 μm) without any broadening was developed by investigating the rheological behavior and cure behavior of the β-TCP suspensions. β-TCP scaffolds with a triply periodic minimal surface structure were also fabricated and exhibited a submicron-scale structure and low shrinkage rate (8%) after sintering. This suspension holds great promise for fabricating controllable β-TCP scaffold structures for bone tissue engineering by ceramic stereolithography.

Published
2021

12. The BP Network for Carrier Frequency Offset Estimation in OFDM-Based WLANs

Author

Zhu, Feng, Hu, Yafeng, Wang, Saiyi, Wei, Peng, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Dough, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Wang, Jun, editor, Yi, Zhang, editor, Zurada, Jacek M., editor, Lu, Bao-Liang, editor, and Yin, Hujun, editor

Published
2006
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13. Hidden Markov Model Networks for Multiaspect Discriminative Features Extraction from Radar Targets

Author

Zhu, Feng, Hu, Yafeng, Zhang, Xianda, Xie, Deguang, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Dough, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Wang, Jun, editor, Yi, Zhang, editor, Zurada, Jacek M., editor, Lu, Bao-Liang, editor, and Yin, Hujun, editor

Published
2006
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14. Handwritten Digit Recognition Using Low Rank Approximation Based Competitive Neural Network

Author

Hu, Yafeng, Zhu, Feng, Lv, Hairong, Zhang, Xianda, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Dough, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Wang, Jun, editor, Yi, Zhang, editor, Zurada, Jacek M., editor, Lu, Bao-Liang, editor, and Yin, Hujun, editor

Published
2006
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15. A Novel Approach for License Plate Recognition Using Subspace Projection and Probabilistic Neural Network

Author

Hu, Yafeng, Zhu, Feng, Zhang, Xianda, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Dough, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Wang, Jun, editor, Liao, Xiao-Feng, editor, and Yi, Zhang, editor

Published
2005
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25. TreeFam: 2008 Update

Author

Ruan, Jue, Li, Heng, Chen, Zhongzhong, Coghlan, Avril, Coin, Lachlan James M., Guo, Yiran, Hériché, Jean-Karim, Hu, Yafeng, Kristiansen, Karsten, Li, Ruiqiang, Liu, Tao, Moses, Alan, Qin, Junjie, Vang, Søren, Vilella, Albert J., Ureta-Vidal, Abel, Bolund, Lars, Wang, Jun, and Durbin, Richard

Published
2008

28. ChickVD: a sequence variation database for the chicken genome

Author

Wang, Jing, He, Ximiao, Ruan, Jue, Dai, Mingtao, Chen, Jie, Zhang, Yong, Hu, Yafeng, Ye, Chen, Li, Shengting, Cong, Lijuan, Fang, Lin, Liu, Bin, Li, Songgang, Wang, Jian, Burt, David W., Wong, Gane Ka-Shu, Yu, Jun, Yang, Huanming, and Wang, Jun

Published
2005

29. SilkDB: a knowledgebase for silkworm biology and genomics

Author

Wang, Jing, Xia, Qingyou, He, Ximiao, Dai, Mingtao, Ruan, Jue, Chen, Jie, Yu, Guo, Yuan, Haifeng, Hu, Yafeng, Li, Ruiqiang, Feng, Tao, Ye, Chen, Lu, Cheng, Wang, Jun, Li, Songgang, Wong, Gane Ka-Shu, Yang, Huanming, Wang, Jian, Xiang, Zhonghuai, Zhou, Zeyang, and Yu, Jun

Published
2005

35. Laser Milling of Micro-Fluidic Grooves under Vacuum Condition

Author

Hu Yafeng, XU Wenji, Wang Lianji, Wu Yongbo, Wang Xu-yue, and Li Jianli

Subjects
Materials science, business.industry, Laser milling, Optoelectronics, Electrical and Electronic Engineering, Micro fluidic, business, Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials
Published
2010

40. The BP Network for Carrier Frequency Offset Estimation in OFDM-Based WLANs.

Author

Wang, Jun, Yi, Zhang, Zurada, Jacek M., Lu, Bao-Liang, Yin, Hujun, Zhu, Feng, Hu, Yafeng, Wang, Saiyi, and Wei, Peng

Abstract

This paper presents an efficient carrier frequency offset (CFO) estimation algorithm for the orthogonal frequency-division multiplexing (OFDM)-based wireless local area networks (WLANs) which adopts the IEEE 802.11 standardization. This algorithm adopts the BP network with the orthogonal projector for the fast adaptive CFO estimation. Numerical results are presented to demonstrate the effectiveness of the proposed algorithm. [ABSTRACT FROM AUTHOR]

Published
2006
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41. Handwritten Digit Recognition Using Low Rank Approximation Based Competitive Neural Network.

Author

Wang, Jun, Yi, Zhang, Zurada, Jacek M., Lu, Bao-Liang, Yin, Hujun, Hu, Yafeng, Zhu, Feng, Lv, Hairong, and Zhang, Xianda

Abstract

A novel approach for handwritten digit recognition is proposed in this paper, which combines the low rank approximation and the competitive neural network together. The images in each class are clustered into several subclasses by the competitive neural network, which is helpful for feature extraction. The low rank approximation is used for image feature extraction. Finally, the k-nearest neighbor classifier is applied to the classification. Experiment results on USPS dataset show the effectiveness of the proposed approach. [ABSTRACT FROM AUTHOR]

Published
2006
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42. Hidden Markov Model Networks for Multiaspect Discriminative Features Extraction from Radar Targets.

Author

Wang, Jun, Yi, Zhang, Zurada, Jacek M., Lu, Bao-Liang, Yin, Hujun, Zhu, Feng, Hu, Yafeng, Zhang, Xianda, and Xie, Deguang

Abstract

This paper presents a new target recognition scheme via the neural network based on Hidden Markov Model (HMM), which processes the multiaspect features. The target features are extracted by the adaptive gaussian representation (AGR) from the view of physics. Discrimination results are presented for ISAR radar return signal. [ABSTRACT FROM AUTHOR]

Published
2006
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43. Experimental Study on Timber-Lightweight Concrete Composite Beams with Ductile Bolt Connectors.

Author

Hu Y, Wei Y, Chen S, Yan Y, and Zhang W

Abstract

A timber-lightweight-concrete (TLC) composite beam connected with a ductile connector in which the ductile connector is made of a stainless-steel bolt anchored with nuts at both ends was proposed. The push-out results and bending performance of the TLC composite specimens were investigated by experimental testing. The push-out results of the shear specimens show that shear-slip curves exhibit good ductility and that their failure can be attributed to bolt buckling accompanied by lightweight concrete cracking. Through the bending tests of ten TLC composite beams and two contrast (pure timber) beams, the effects of different bolt diameters on the strengthening effect of the TLC composite beams were studied. The results show that the TLC composite beams and contrast timber beams break on the timber fiber at the lowest edge of the TLC composite beam, and the failure mode is attributed to bending failure, whereas the bolt connectors and lightweight concrete have no obvious breakage; moreover, the ductile bolt connectors show a good connection performance until the TLC composite beams fail. The ultimate bearing capacities of the TLC composite beams increase 2.03-3.5 times compared to those of the contrast beams, while the mid-span maximum deformation decrease nearly doubled.

Published
2021
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