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Facial expression recognition via weighted group sparsity

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Frontiers of Computer Science 2017年第2期11卷 266-275页

作者： Hao ZHENG xin geng Key Laboratory of Trusted Cloud Computing and Big Data Analysis School of Information Engineering Nanjing Xiaozhuang University Nanjing 211171 China School of Computer Science and Engineering Southeast University Nanjing 211189 China

Considering the distinctiveness of different group features in the sparse representation, a novel joint multi- task and weighted group sparsity （JMT-WGS） method is pro- posed. By weighting popular group sparsity, not only the rep- resentation coefficients from the same class over their asso- ciate dictionaries may share some similarity, but also the rep- resentation coefficients from different classes have enough di- versity. The proposed method is cast into a multi-task frame- work with two-stage iteration. In the first stage, representa- tion coefficient can be optimized by accelerated proximal gra- dient method when the weights are fixed. In the second stage, the weights are computed via the prior information about their entropy. The experimental results on three facial expres- sion databases show that the proposed algorithm outperforms other state-of-the-art algorithms and demonstrate the promis- ing performance of the proposed algorithm.

关键词： facial expression recognition multi-task learning group sparsity

Partial-TMR: A New Method for Protecting Register Files Against Soft Error Based on Lifetime Analysis

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Journal of Computer Science & Technology 2021年第5期36卷 1089-1101页

作者： Xian-geng Liang Ying-Ke Gao geng-xin Hua Beijing Institute of Control Engineering China Academy of Space TechnologyBeijing 100090China

High-energy particles in the space can easily cause soft error in register file(RF).As a critical structure in a processor,RF often stores data for long periods of time and is read frequently,resulting in a higher probability of spreading corrupted data to other parts of the *** triple modular redundancy(TMR)is a common and effective fault tolerance method that enables multi-bit error *** full TMR for all the registers could cause excessive area and power ***,some registers in RF have less impact on processor ***,there is no need to design TMR for *** paper designs an efficient strategy which can rate the registers in RF based on their *** on the proposed strategy,a new RF fault tolerance method named Partial-TMR formulates in this paper,which selectively protects more vulnerable registers against multi-bit error,and improves fault tolerance *** integer RF,Partial-TMR improves its soft error correction capability by 24.5%relative to the baseline system and 3%relative to ParShield,while for floating-point RF,the improvement comes to 5.17%and 0.58%*** soft error correction capability of Partial-TMR is slightly lower than that of full TMR by 1%to 3%,but Partial-TMR significantly cuts the area and power *** with full TMR,Partial-TMR decreases the area and power overheads by 71.6%and 64.9%,*** also has little impact on the ***-TMR is a more cost-effective fault tolerance method compared with ParShield and full TMR.

关键词： register file soft error lifetime analysis selective protection triple modular redundancy(TMR)

An APD-Based Evaluation on the Effect of Transient Disturbance over Digital Transmission

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Chinese Journal of Electronics 2020年第1期29卷 57-65页

作者： geng xin WEN Yinghong ZHANG Jinbao Institute of Electromagnetic Compatibility Beijing Jiaotong University Beijing Engineering Research Center of EMC and GNSS Technology for Rail Transportation

In railway electromagnetic environment,transient disturbances usually degenerate the function of railway wireless communication systems, thus may cause severe security issues. To protect communication services,measurement methodology to characterize disturbances keeps evolving. Nowadays, the statistical characteristics of disturbances, such as Amplitude probability distribution(APD), have been proven more efficient to assess the degradation of digital transmission than Quasipeak detection in most Electromagnetic Compatibility standards. To demonstrate the impact of disturbances on error performance more precisely, a more refined method to estimate Bit error probability(BEP) of digital modulation is necessary. The APD value is ideally obtained with the equivalent bandwidth of the radio service under threat, which means specific apparatus of certain radio service is consequently indispensable. This paper proposes a novel method to estimate the maximum BEP of multilevel amplitude modulations based on APD acquired by standard apparatus. The calculated BEP also provides reference for APD emission restriction.

关键词： APD BEP Digital transmission Transient disturbance

Practical age estimation using deep label distribution learning

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Frontiers of Computer Science 2021年第3期15卷 75-80页

作者： Huiying ZHANG Yu ZHANG xin geng Pujiang Institute Nanjing Tech UniversityNanjing 211200China School of Computer Science and Engineering Southeast UniversityNanjing 211189China

Age estimation plays an important role in human-computer interaction *** lack of large number of facial images with definite age label makes age estimation al-gorithms *** label distribution learning(DLDL)which employs convolutional neural networks(CNN)and label distribution learning to learn ambiguity from ground-truth age and adjacent ages,has been proven to outperform current state-of-the-art ***,DLDL assumes a rough label distribution which covers all ages for any given age *** this paper,a more practical label distribution paradigm is proposed:we limit age label distribution that only covers a reasonable number of neighboring *** addition,we explore different label distributions to improve the performance of the proposed learning *** employ CNN and the improved label distribution learning to estimate *** results show that compared to the DLDL,our method is more effective for facial age recognition.

关键词： deep learning convolutional neural networks label distribution learning facial age estimation

Reaction mechanisms between molten CaF2-based slags and molten 9CrMoCoB steel

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International Journal of Minerals,Metallurgy and Materials 2020年第5期27卷 611-619页

作者： Lei-zhen Peng Zhou-hua Jiang xin geng School of Metallurgy Northeastern UniversityShenyang 110819China

Investigating the reaction mechanism between slag and 9CrMoCoB steel is important to develop the proper slag and produce qualified ingots in the electroslag remelting(ESR) process. Equilibrium reaction experiments between molten 9CrMoCoB steel and the slags of 55 wt%CaF2–20 wt%CaO–3 wt%MgO–22 wt%Al2O3–xwt%B2O3(x = 0.0, 0.5, 1.0, 1.5, 2.0, 3.0) were conducted. The reaction mechanisms between molten 9 CrMoCoB steel and the slags with different B2O3 contents were deduced based on the composition of the steel and slag samples at different reaction times. Results show that B content in the steel can be controlled within the target range when the B2O3 content is 0.5 wt% and the FeO content ranges from 0.18 wt% to 0.22 wt% in the slag. When the B2O3 content is ≥1 wt%, the reaction between Si and B2O3 leads to the increase of the B content of steel. The additions of SiO2 and B2O3 to the slag should accord to the mass ratio of [B]/[Si] in the electrode, and SiO2 addition inhibits the reaction between Si and Al2O3.

关键词： 9CrMoCoB electroslag remelting B2O3 thermodynamic calculation reaction mechanism

Label distribution for multimodal machine learning

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Frontiers of Computer Science 2022年第1期16卷 33-43页

作者： Yi REN Ning XU Miaogen LING xin geng Department of Computer Science and Engineering Southeast UniversityNanjing211189China

Multimodal machine learning(MML)aims to understand the world from multiple related *** has attracted much attention as multimodal data has become increasingly available in real-world *** is shown that MML can perform better than single-modal machine learning,since multi-modalities containing more information which could complement each ***,it is a key challenge to fuse the multi-modalities in *** from previous work,we further consider the side-information,which reflects the situation and influences the fusion of *** recover multimodal label distribution(MLD)by leveraging the side-information,representing the degree to which each modality contributes to describing the ***,a novel framework named multimodal label distribution learning(MLDL)is proposed to recover the MLD,and fuse the multimodalities with its guidance to learn an in-depth understanding of the jointly feature ***,two versions of MLDL are proposed to deal with the sequential *** on multimodal sentiment analysis and disease prediction show that the proposed approaches perform favorably against state-of-the-art methods.

关键词： multimodal machine learning label distribution learning sentiment analysis disease prediction

Theoretical Study on Vibrational Spectra, Detonation Properties and Pyrolysis Mechanism for Cyclic 2-Diazo-4,6-dinitrophenol

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Chinese Journal of Chemical Physics 2012年第5期25卷 545-551,I0003页

作者： Xiao-hong Li geng-xin Yin Xian-zhou Zhang College of Physics and Engineering Henan University of Science and TechnologyLuoyang 471003China Luoyang Key Laboratory of Photoelectric Functional Materials Henan University of Science andTechnologyLuoyang 471023China College of Physics and Information Engineering Henan Normal UniversityXinxiang 453007China

Based on the full optimized molecular geometrical structures at the DFT-B3LYP/6- 311＋G^＊＊ level, there exists intramolecular hydrogen bond interaction for cyclic 2-diazo- 4,6-dinitrophenol. The assigned infrared spectrum is obtained and used to compute the thermodynamic properties. The results show that there are four main characteristic regions in the calculated IR spectra of the title compound. The detonation velocities and pressures are also evaluated by using Kamlet-Jacobs equations based on the calculated density and condensed phase heat of formation. Thermal stability and the pyrolysis mechanism of 2- diazo-4,6-dinitrophenol are investigated by calculating the bond dissociation energies at the B3LYP/6-311＋G^＊＊ level.

关键词： Cyclic 2-diazo-4 6-dinitrophenol Pyrolysis mechanism Detonation property Infrarecl spectrum

Measurement of Transverse Tensile Interfacial Strength of REBCO-Coated Conductors

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Acta Mechanica Solida Sinica 2022年第1期35卷 40-50页

作者： Peifeng Gao xin geng Houyuan Zhang Guian Man xingzhe Wang Key Laboratory of Mechanics on Western Disaster and Environment Ministry of EducationCollege of Civil Engineering and MechanicsKey Laboratory of Special Function Materials and Structure Design of Ministry of EducationLanzhou UniversityLanzhou 730000China

We present a new test method for the accurate measurement of the transverse tensile interfacial strength of rare-earth barium copper oxide(REBCO)-coated conductor(CC)tapes to overcome heavy scattering of data tested using regular test methods.A new composite structure specimen is designed and constructed by solidifying a standard epoxy resin tensile specimen using the three-dimensional printing technology,where a short REBCO CC tape is *** feasibility of the proposed test method is numerically validated through finite element(FE)*** results show that the valid delaminated strength is 2.19-2.51 MPa with the maximum relative error of 7.3%,indicating the elimination of significant scattering in the tested *** analysing the morphology of the delaminated interfaces and energy-dispersive spectroscopy results,it is discovered that delamination primarily occurs at the interface between the REBCO superconducting layer and the buffer layer and that a small portion of the REBCO and buffer layers peels *** error analysis based on the FE method indicates that the tape is more likely to delaminate because of initial defects,whereas the adhesion at the edges of the CC tape due to the redundancy of the epoxy resin increases the resistance of the CC tape to delamination,resulting in a higher testing value than the real one.

关键词： REBCO-coated conductor tapes Delamination strength Transverse tension Experimental method Finite element analysis Cohesive zone model

Important role of the ENSO combination mode in the maintenance of the anomalous anticyclone over the western North Pacific in boreal summer

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Science China Earth Sciences 2022年第7期65卷 1379-1387页

作者： Wenjun ZHANG Zuoli YU Feng JIANG xin geng Renhe ZHANG CIC-FEMD/ILCEC Key Laboratory of Meteorological Disaster of Ministry of Education(KLME)/School of Atmospheric SciencesNanjing University of Information Science and TechnologyNanjing 210044China Zhangjiagang Meteorological Bureau Suzhou 215600China Institute of Atmospheric and Oceanic Sciences Fudan UniversityShanghai 200433China

This study demonstrates the main physical mechanism for the maintenance of the western North Pacific(WNP)anomalous anticyclone(WNPAC)during the El Niño decaying summer by analyzing the respective effects of the cold sea surface temperature(SST)anomalies in the WNP,the warm SST anomalies in the Indian Ocean(IO),and the El Niño and Southern Oscillation(ENSO)combination *** find that the WNPAC is usually accompanied by significant cold WNP SST anomalies in the El Niño mature winter and following spring,which almost disappear in the decaying summer and cannot explain the maintenance of the WNPAC in *** influence of the IO warm SST anomalies on the WNPAC exhibits conspicuous decadal *** the 2000 s,the IO warm SST anomalies played a role in the WNPAC maintenance through the response of the baroclinic atmospheric Kelvin wave;however,this effect cannot be evidently detected after the 2000 *** decadal difference may be related to changes in the decaying speed of ENSO *** contrast to El Niño events before the 2000 s,El Niño events after the 2000 s decay more rapidly,and the associated tropical central-eastern Pacific SST features a La Ni?a-like condition in the El Niño decaying ***,no significant warm SST anomalies appear over the tropical Indian Ocean,exerting a weak influence on the *** to the cold WNP SSTanomalies and warm IO SST anomalies,the ENSO combination mode,originating from the nonlinear interaction between ENSO and the annual cycle,has a relatively stable relationship with the WNPAC during the El Niño decaying summer,which exhibits a crucial role in the maintenance of the *** the persistence of the ENSO combination mode,the WNPAC and associated climate variability during the El Niño decaying summer can be skillfully predicted at least one season in advance based on the ENSO combination mode.

关键词： ENSO WNP anomalous anticyclone ENSO combination mode

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