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Temporally shifted hemodynamic response model helps to extract acupuncture-induced functional magnetic resonance imaging blood oxygenation-level dependent activities

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Chinese Medical Journal 2009年第7期122卷 823-829页

作者： Tsung-Jung Ho Jeng-Ren Duann Chun-Ming Chen Jeon-Hor Chen Wu-Chung Shen Tung-Wu Lu Jan-Ray Liao zen-pin lin Kuo-Ning Shaw Jaung-Geng lin School of Chinese Medicine College of Chinese Medicine ChinaMedical University Taiwan China Institute for Neural Computation University of California SanDiego La Jolla CA USA Department of Radiology China Medical University HospitalTaichung Taiwan China Department of Electric Engineering National ISlaung-StnnUniversity Taichung Taiwan China Institute of Biomedical Engineering National Taiwan UniversityTaipei Taiwan China Department of Holistic Wellness MingDao University TaiwanChina Graduaie Institute of Acupuncture Science China MedicalUniversity Taiwan China ChangHwa Hospital Department of Health Executive YuanTaiwan China

Background The onsets of needling sensation introduced by acupuncture stimulus can vary widely from subject to subject. This should be explicitly accounted for by the model blood oxygenation-level dependent （BOLD） time course used in general linear model （GLM） analysis to obtain more consistent across-subject group results. However, in standard GLM analysis, the model BOLD time course obtained by convolving a canonical hemodynamic response function with an experimental paradigm time course is assumed identical across subjects. Although some added-on properties to the model BOLD time course, such as temporal and dispersion derivatives, may be used to account for different BOLD response onsets, they can only account for the BOLD onset deviations to the extent of less than one repetition time （TR）. Methods In this study, we explicitly manipulated the onsets of model BOLD time course by shifting it with -2, -1, or 1 TR and used these temporally shifted BOLD model to analyze the functional magnetic resonance imaging （fMRI） data obtained from three acupuncture fMRI experiments with GLM analysis. One involved acupuncture stimulus on left ST42 acupoint and the other two on left GB40 and left BL64 acupoints. Results The model BOLD time course with temporal shifts, in addition to temporal and dispersion derivatives, could result in better statistical power of the data analysis in terms of the average correlation coefficients between the used BOLD models and extracted BOLD responses from individual subject data and the T-values of the activation clusters in the grouped random effects. Conclusions The GLM analysis with ordinary BOLD model failed to catch the large variability of the onsets of the BOLD responses associated with the acupuncture needling sensation. Shifts in time with more than a TR on model BOLD time course might be required to better extract the acupuncture stimulus-induced BOLD activities from individual fMRI data.

关键词： acupuncture magnetic resonance imaging, functional blood oxygenation-level dependent responses

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Assessment of highway slope failure using neural networks

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2009年第1期10卷 101-108页

作者： Tsung-lin LEE Hung-ming lin Yuh-pin LU 1Department of Construction and Facility Management Department of Resource and Environment Leader University

An artificial intelligence technique of back-propagation neural networks is used to assess the slope ***-site slope failure data from the South Cross-Island Highway in southern Taiwan are used to test the performance of the neural network *** numerical results demonstrate the effectiveness of artificial neural networks in the evaluation of slope failure potential based on five major factors,such as the slope gradient angle,the slope height,the cumulative precipitation,daily rainfall and strength of materials.

关键词： Neural network Prediction Highway Slope failure

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Human Action Recognition Based on Dense Trajectories Analysis and Random Forest

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Journal of Electronic Science and Technology 2016年第4期14卷 370-376页

作者： pin-Zhong Pan Chung-lin Huang Sonix Technology HsinChu 30265HsinChu Department of M-Commerce and Multimedia Applications Asia UniversityTaichung 41354Taichung

This paper presents a human action recognition method. It analyzes the spatio-temporal grids along the dense trajectories and generates the histogram of oriented gradients （HOG） and histogram of optical flow （HOF） to describe the appearance and motion of the human object. Then, HOG combined with HOF is converted to bag-of-words （BoWs） by the vocabulary tree. Finally, it applies random forest to recognize the type of human action. In the experiments, KTH database and URADL database are tested for the performance evaluation. Comparing with the other approaches, we show that our approach has a better performance for the action videos with high inter-class and low inter-class variabilities.

关键词： Bag-of-words (BoWs) dense trajectories histogram of optical flow (HOF) histogram of oriented gradient (HOG) random forest vocabulary tree.

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Tilting objects on tubular weighted projective lines: A cluster tilting approach

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Science China Mathematics 2021年第4期64卷 691-710页

作者： Jianmin Chen Yanan lin pin Liu Shiquan Ruan School of Mathematical Sciences Xiamen UniversityXiamen 361005China Department of Mathematics Southwest Jiaotong UniversityChengdu 610031China

Using the cluster tilting theory,we investigate the tilting objects in the stable category of vector bundles on a weighted projective line of weight type(2,2,2,2).More precisely,a tilting object consisting of rank-two bundles is constructed via the cluster tilting ***,the cluster tilting approach also provides a new method to classify the endomorphism algebras of the tilting objects in the category of coherent sheaves and the associated bounded derived category.

关键词： tilting object cluster tilting weighted projective line vector bundle cluster mutation

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Tensile and compressive behavior of Ti-based bulk metallic glass composites

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International Journal of Minerals,Metallurgy and Materials 2013年第6期20卷 582-588页

作者： Yong-sheng Wang Guo-jian Hao Jun-pin lin State Key Laboratory for Advanced Metals and Materials University of Science and Technology Beijing

This article focuses on the tensile and compressive characteristics of a Ti-based bulk metallic glass composite （BMGC）. It is found that the yield stress, maximum strength, and fracture strain are 1380 MPa, 1516 MPa, and 4.3% for uniaxial tension, but 1580 MPa, 4010 MPa, and 29% for uniaxial compression, respectively. The composite displays a linear ＂work hardening＂ capacity under compression; however, the ＂work softening＂ behavior is observed in the true engineering stress-strain curve upon tensile loading. The fracture surfaces of specimens also exhibit dissimilar properties under the different loadings.

关键词： metallic glass composite materials tensile testing compression testing fracture

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Advances in phase relationship for high Nb-containing TiAl alloys

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Rare Metals 2016年第1期35卷 15-25页

作者： Yong-Feng Liang Xiang-Jun Xu Jun-pin lin State Key Laboratory for Advanced Metals and Materials University of Science and Technology Beijing Materials and Chemistry School Zhongyuan University of Technology

γ-TiAl alloys,including two categories（the conventional TiAl and the high Nb-containing TiAl（high Nb-TiAl））,are technologically intriguing because of their applications at high ***,the service temperature of the high Nb-TiAl alloys is 60-100℃higher than that of conventional TiAl *** developed TiAl alloys,for example TNB,TNM,β-γ alloys,belong to the high Nb-TiAl alloys,displaying similar behavior in phase transformation,strengthening,oxidation at high temperatures,and relationships between composition,microstructure,and mechanical *** work presents an in-depth review of the high Nb-TiAl alloys regarding the advances in phase diagram,formation mechanism of the new γ_1 phase,microsegregation induced by adding a high content of alloying element Nb,and the mechanism of the B2/ω phase *** challenges in developing the high Nb-TiAl alloys are also discussed.

关键词： TiAl alloy Nb addition Phase diagram Microsegregation Microstructure

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Microstructure and microsegregation of directionally solidified Ti–45Al–8Nb alloy with different solidification rates

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Rare Metals 2016年第1期35卷 70-76页

作者： Xiang-Jun Xu lin Song Xiao-Ou Jin Dong-Dong Han Xin Wang Jun-pin lin Materials and Chemistry School Zhongyuan University of Technology State Key Laboratory for Advanced Metals and Materials University of Science and Technology Beijing School of Architecture and Engineering Heilongjiang University

Microstructure and microsegregation of directionally solidified Ti-45Al-8Nb alloy were investigated by scanning electron microscopy（SEM）,transmission electron microscopy（TEM） and electron probe microanalyzer（EPMA）.For the alloy solidified at the solidification rates（v） ranging from 10 to 400 μm·s^（-1）,the microstructure of the mushy zone exhibits a cellular-dendritic structure at lower growth rate（v=10-50 μm·s^（-1）） and a typical dendritic morphology at higher growth rate（v = 100-400 μm·s^（-1））.The relationship between primary dendrite arm spacing（λ_1）and v is λ_1=1.08×10~3v^（-0.35）.Al and Nb elements segregate at interdendritic zone and in the dendritic core,*** solid of mushy zone,a relatively flat concentration profile is observed for the typical dendrite structure,and Nb enriches in B2 phase induced by β→α＋β*** content of B2 phase is hardly affected by *** extent of microsegregation in steady-state zone decreases at a lower growth rate because holding the samples at higher temperature after solidification for a long time can homogenize the solid effectively.

关键词： Nb-containing TiAl alloy Solidification Microstructure Microsegregation

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A STUDY ON FACTORS FOR RETAILERS IMPLEMENTING CPFR-A FUZZY AHP ANALYSIS

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Journal of Systems Science and Systems Engineering 2010年第2期19卷 192-209页

作者： Hsin-pin FU Kuo-Kuang CHU Sheng-Wei lin Chi-Ren CHEN Department of Marketing and Distribution Management National Kaohsiung First University of Science and Technology Kaohsiung (811) Taiwan China Department of Tourism management Shih Chien University Kaohsiung campus (845) Taiwan China Department of Marketing and Logistics Management Far East University Tainan County (744) Taiwan China

Since collaborative, planning, forecasting, and replenishment （CPFR） was first proposed in 1998, numerous studies have focused on exploring its implementation in retailing contexts. While a considerable body of research has emphasized reduced costs, increased sales and improved forecasting ability, there has been a lack of research on the importance of each of the various factors which affect such implementations. In order to find out the critical success factors affecting CPFR implementation, this paper first collected related influence factors regarding adopting CPFR or business to business （B2B） information systems, and further constructed a factor table with a three-layer hierarchical structure. A pair wise analytic hierarchy process （AHP） questionnaire was designed and distributed to experts who were familiar with implementing CPFR in the retailing industry. After questionnaires were returned, we found out the weights of each impact factor by using a fuzzy analytic hierarchy process （fuzzy AHP） approach. The importance of each critical impact factor was investigated, and the paths of the critical success factors were also analyzed. The results of this study can provide more precise information with regard to allocating optimal resources for retailers implementing CPFR.

关键词： Collaborative planning forecasting and replenishment (CPFR) critical influence factors fuzzy analytic hierarchy process (fuzzy AHP)

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linear complexity of quaternary sequences with odd period and low autocorrelation

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The Journal of China Universities of Posts and Telecommunications 2014年第5期21卷 89-93页

作者： KE pin-hui lin Chang-lu ZHANG Sheng-yuan Fujian Provincial Key Laboratory of Network Security and Cryptology Fujian Normal University

Equivalence between two classes of quaternary sequences with odd period and best known autocorrelation are proved. A lower bound on the linear complexity of these sequences is presented. It is shown that the quaternar... 详细信息

关键词： quaternary sequences linear complexity cyclotomy

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Analysis of peripapillary retinal nerve fiber layer and inner macular layers by spectral-domain optical coherence tomography for detection of early glaucoma

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International Journal of Ophthalmology(English edition) 2018年第7期11卷 1163-1172页

作者： Pei-Wen lin Hsueh-Wen Chang Jih-pin lin Ing-Chou Lai Department of Ophthalmology Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine Department of Biological Sciences Sun Yat-Sen University

AIM： To analyze the diagnostic capabilities of peripapillary retinal nerve fiber layer（p RNFL） thickness and segmented inner macular layer（IML） thickness measured by spectraldomain optical coherence tomography for detection of early glaucoma. METHODS： Fifty-three patients with primary open angle glaucoma（POAG）, 60 patients with normal tension glaucoma（NTG） and 32 normal control subjects were enrolled. Thicknesses of p RNFL, total macular layers（TML）, and the IML, including macular RNFL（m RNFL） and macular ganglion cell layer（m GCL） were assessed. The areas under the receiver operating characteristic curves（AROC） were calculated to compare the diagnostic power of different parameters. RESULTS： There were no differences in the parameters of p RNFL, TML, and IML between POAG and NTG groups. The thicknesses of superior and inferior m GCL showed significant correlation with mean deviation of visual field（R2=0.071, P=0.004; R2=0.08, P=0.002）. The m GCL thickness significantly correlated with the p RNFL thickness in the superior and inferior quadrants（R2=0.156, P〈0.001; R2=0.407, P〈0.001）. The thickness of the inferior-outer sector of macula had greater AROCs than those in the inferior-inner sector of macula. The AROCs for superior（0.894） and inferior（0.879） p RNFL thicknesses were similar with the AROCs for superior（0.839） and inferior m GCL（0.864） thicknesses. Sensitivities at 80% specificity for global p RNFL, inferior-outer m GCL and inferior-outer m RNFL thicknesses were 0.938, 0.867, and 0.725, respectively. CONCLUSION： The diagnostic capability of the m GCL thickness is comparable to that of the p RNFL thickness in patients with early glaucoma. The inferior-outer sector of IML has a better diagnostic capability than the inferiorinner sector of IML for detection of early glaucoma.

关键词： retinal nerve fiber layer ganglion cell layer primary open angle glaucoma normal tension glaucoma optical coherence tomography

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