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Super-Elasticity Characteristics of TiNi Alloy Processed by Equal Channel Angular Extrusion

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稀有金属材料与工程 2009年第A03期38卷 123-128页

作者： fan Zhiguo jiang Hong Xie Chaoying Shanghai Jiaotong University Shanghai 200240 China

A Ni-rich TiNi alloy was processed by Equal Channel Angular Extrusion (ECAE) at 500℃. After four passes ECAE treatment, microstructure of the alloy was refined but slightly inhomogeneous, to sub-micron scale, approximately 0.5～0.6 μm. Comparing with the solution-treated TiNi specimen, the martensitic transformations start (Ms) and peak temperatures (Mp) of TiNi specimens processed by ECAE were dramatically lowered. After ECAE treatment, the R-phase transformation was stimulated and separated from martensitic transformation, but occurred within a larger temperature range. Super-elasticity characteristics of TiNi alloy were tested by tensile loading and unloading cycles. The results revealed that at a tensile strain of 6% or smaller, TiNi alloy processed by four passes ECAE showed better super-elasticity, with less residual strain retained, than solution-treated sample. After tensile strain exceeded 6%, up to 8%, the maximum recoverable strain of TiNi alloy ECAE treated was decreased. Microstructure evolution and its effect on phase transformations and super-elasticity characteristics were discussed.

关键词：钛镍合金物理性能熔点峰值温度

Comparison between TeV and non-TeV BL Lac Objects

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Research in Astronomy and Astrophysics 2016年第7期16卷 15-28页

作者： Chao lin Jun-Hui fan Center for Astrophysics Guangzhou University Guangzhou 510006 China Astronomy Science and Technology Research Laboratory of Department of Education of Guangdong Province Guangzhou 510006 China

BL Lacertae objects（BL Lacs） are the dominant population of Te V emitting blazars. In this work, we investigate whether there are any special observational properties associated with Te V *** do so, we will compare the observational properties of Te V detected BL Lacs（Te V BLs） with non-Te V detected BL Lac objects（non-Te V BLs）. From the 3rd Fermi/LAT source catalog（3FGL）, we can obtain662 BL Lacs, out of which 47 are Te V BLs and 615 are non-Te V BLs. Their multi-wavelength flux densities（FpR, FO, FX and Fγ）, photon spectral indexes（α^phXand α^phγ）, and effective spectral indexes（αRO and αOX）are compiled from the available literature. Then the luminosities（log ν LR, log ν LO, log ν LX, log ν Lγ）are calculated. From comparisons, we find that Te V BLs are different from low synchrotron peaked BLs and intermediate synchrotron peaked BLs, but Te V BLs show similar properties to high synchrotron peaked（HSP） BLs. Therefore, we concentrated on a comparison between Te V HSP BLs and non-Te V HSP *** results suggest that Te V HSP BLs and non-Te V HSP BLs exhibit some differences in their αRO and αphγ, but their other properties are quite similar.

关键词： galaxies active BL Lacertae objects general gamma rays galaxies

The Intersection Numbers of Nearly Kirkman Triple Systems

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Acta Mathematica Sinica,English Series 2016年第12期32卷 1430-1450页

作者： Bing Li fan Zhong Hao jiang Institute of Mathematics Beijing Jiaotong University

In this paper, we investigate the intersection numbers of nearly Kirkman triple ***[V] is the set of all integers k such that there is a pair of NKTS（v）s with a common uncovered collection of 2-subset intersecting in k triples. It has been established that JN[v] = {0, 1,. v（v-2）/6-6,v（v-2）/6-4,v（v-2）/6} for any integers v = 0 （mod 6） and v ≥ 66. For v ≤ 60, there are 8 cases leftundecided.

关键词： Nearly kirkman triple system parallel class frame intersection number

Laplacian and signless Laplacian Z-eigenvalues of uniform hypergraphs

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Frontiers of Mathematics in China 2016年第3期11卷 511-520页

作者： Changjiang BU Yamin fan jiang ZHOU College of Science Harbin Engineering University Harbin 150001 China

We show that a connected uniform hypergraph G is odd-bipartite if and only if G has the same Laplacian and signless Laplacian Z-eigenvalues. We obtain some bounds for the largest （signless） Laplacian Z-eigenvalue of a hypergraph. For a k-uniform hyperstar with d edges （2d ≥ k ≥ 3）, we show that its largest （signless） Laplacian Z-eigenvalue is d.

关键词： Hypergraph eigenvalue Laplacian tensor signless Laplaciantensor Z-eigenvalue

Spectral energy distributions for TeV blazars

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Research in Astronomy and Astrophysics 2018年第10期18卷 19-32页

作者： Chao lin Jun-Hui fan Center for Astrophysics Guangzhou UniversityGuangzhou 510006China Astronomy Science and Technology Research Laboratory of Department of Education of Guangdong Province Guangzhou 510006China

In this work, we collected a sample of 69 TeV blazars from TeVCat, obtained their multi-wavelength observations, and fitted their spectral energy distributions by using a second degree poly-nomial function. The structure parameters of synchrotron bumps for 68 blazars and those of inverse- Compton bumps for 56 blazars were derived. Then, we conducted statistical analysis on the parame-ters （curvature, peak frequency, peak luminosity, bolometric luminosity and X/γ-ray spectral indexes）. From our analysis and discussions, we can conclude the following：（1） There is a clear positive correla-tion between the synchrotron peak frequency, log （Vp）^s, and the inverse-Compton peak frequency, log （Vp）^IC, and between the synchrotron peak luminosity, log （Vp）^sL（Vp）^s, and the inverse-Compton peak luminosity,log（Vp）^IC L（Vp）^IC. （2） The correlation between the peak frequency and the curvature of synchrotron bump is clearly different from that of the inverse-Compton bump, which further indicates that there are differ-ent emission mechanisms between them. （3） There is a correlation between log （Vp）^IC and γ-ray spectral index, αγ, for the TeV blazars： log （Vp）^IC = -（4.59 ± 0.30）αγ ＋（32.67 ±0.59）, which is consistent with previous work. （4） An ＂L-shape＂ relation is found between log（Vp）^s Up and αx for both TeV blazars and Fermi blazars. A significant correlation between log（Vp）^s and X-ray photon index （αx） is found for the TeV blazars with high synchrotron peak frequency： log（Vp）^s = -（3.20 ± 0.34）αx ＋（24.33 ± 0.79）, while the correlation is positive for low synchrotron peaked TeV sources. （5） In the αx -αγ diagram, there is also an ＂L-shape.＂ The anti-correlation is consistent with results available in the literature, and we also find a positive correlation between them. （6） Inverse-Compton dominant sources have luminous bolometric luminosities.

关键词： galaxies active - BL Lacertae objects general - quasars general - galaxies jets

A Robust Framework for Multimodal Sentiment Analysis with Noisy Labels Generated from Distributed Data Annotation

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Computer Modeling in Engineering & Sciences 2024年第6期139卷 2965-2984页

作者： Kai jiang Bin Cao Jing fan School of Computer Science and Technology Zhejiang University of TechnologyHangzhou310023China

Multimodal sentiment analysis utilizes multimodal data such as text,facial expressions and voice to detect people’s *** the advent of distributed data collection and annotation,we can easily obtain and share such multimodal ***,due to professional discrepancies among annotators and lax quality control,noisy labels might be *** research suggests that deep neural networks(DNNs)will overfit noisy labels,leading to the poor performance of the *** address this challenging problem,we present a Multimodal Robust Meta Learning framework(MRML)for multimodal sentiment analysis to resist noisy labels and correlate distinct modalities ***,we propose a two-layer fusion net to deeply fuse different modalities and improve the quality of the multimodal data features for label correction and network ***,a multiple meta-learner(label corrector)strategy is proposed to enhance the label correction approach and prevent models from overfitting to noisy *** conducted experiments on three popular multimodal datasets to verify the superiority of ourmethod by comparing it with four baselines.

关键词： Distributed data collection multimodal sentiment analysis meta learning learn with noisy labels

Present and future of robot-assisted endoscopic thyroid surgery

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Chinese Medical Journal 2012年第5期000卷 926-931页

作者： fan lin-jun jiang Jun Breast Disease Center Southwest HospitalThird Military Medical UniversityChonqing 400038China

Objective Robot-assisted endoscopic surgery has been increasingly accepted because of its unique three-dimensional vision and precise simulation-based technology. However, the utilization of robotic systems in thyroid surgery is limited. We conducted a systematic review to assess the application and development of robot-assisted endoscopic surgical technique in thyroid surgery.

关键词： robot-assisted endoscope thyroid surgery

Hamiltonian Systems and Darboux Transformation Associated with a 3 × 3 Matrix Spectral Problem

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Communications in Theoretical Physics 2007年第2X期48卷 205-210页

作者： LUO lin fan En-Gui Department of Mathematics Xiaogan University Xiaogan 432100 China School of Mathematics Fudan University Shanghai 200433 China

Starting from a 3 × 3 matrix spectral problem, we derive a hierarchy of nonlinear equations. It is shown that the hierarchy possesses bi-Hamiltonian structure. Under the symmetry constraints between the potentials and the eigenfunctions, Lax pair and adjoint Lax pairs including partial part and temporal part are nonlinearied into two finitedimensional Hamiltonian systems （FDHS） in Liouville sense. Moreover, an explicit N-fold Darboux transformation for CDNS equation is constructed with the help of a gauge transformation of the spectral problem.

关键词： nonlinear equations Hamiltonian system symmetry constraint Darboux transformation

Developing Neuroimaging Biomarker for Brain Diseases with a Machine Learning Framework and the Brainnetome Atlas

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Neuroscience Bulletin 2021年第10期37卷 1523-1525页

作者： Weiyang Shi lingzhong fan Tianzi jiang Brainnetome Center Institute of AutomationChinese Academy of SciencesBeijing 100190China National Laboratory of Pattern Recognition Institute of AutomationChinese Academy of SciencesBeijing 100190China School of Artificial Intelligence University of Chinese Academy of SciencesBeijing 100049China CAS Center for Excellence in Brain Science and Intelligence Technology Institute of AutomationChinese Academy of SciencesBeijing 100190China School of Life Science and Technology University of Electronic Science and Technology of ChinaChengdu 610054China The Queensland Brain Institute University of QueenslandBrisbaneQLD 4072Australia

Neuroimaging made it possible to quantify brain structure and ***,there are few neuroimaging biomarkers for the early diagnosis,prognosis,and evaluation of therapy for brain *** development of neuroimaging biomarkers for brain diseases faces two major bottleneck ***,the neuroimaging datasets of brain diseases are always characterized by small sample size,high dimension,and large ***,a fine-grained individualized human brain atlas for effective dimensionality reduction has always been lacking.

关键词： function diagnosis diseases