65 results on '"Zhaoqi Wu"'
Search Results
2. Mechanical behavior of locally corroded circular steel tube under compression
- Author
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Yuan Wei, Xintao Wang, Shao-Fei Jiang, and Zhaoqi Wu
- Subjects
Materials science ,0211 other engineering and technologies ,Stiffness ,020101 civil engineering ,02 engineering and technology ,Building and Construction ,Penetration (firestop) ,engineering.material ,Compression (physics) ,Durability ,Finite element method ,0201 civil engineering ,Corrosion ,Coating ,Buckling ,021105 building & construction ,Architecture ,medicine ,engineering ,medicine.symptom ,Composite material ,Safety, Risk, Reliability and Quality ,Civil and Structural Engineering - Abstract
Localized corrosion often occurs on steel members due to paint peeling led from insufficient durability of the coating material or human collision, which may significantly reduce the load carrying capacity and safety performance of the structures. The effects of the parameters such as localized corrosion penetration, circumferential corrosion ratio, longitudinal corrosion ratio, slenderness ratio and eccentricity of mechanical behaviors of locally corroded circular steel tubes under compression were studied experimentally and numerically. Based on the test results and the finite element analysis, a calculation method was proposed for predicting load carrying capacity of the corroded specimen under compression. It is found that localized corrosion did not change the failure modes of test specimens, and all of them failed in the limit point buckling mode. The factors affecting the degradation of load carrying capacity and stiffness of localized corrosion specimens from high to low were corrosion time, circumferential corrosion ratio and longitudinal corrosion ratio. The most unfavorable localized corrosion modes of load carrying capacity and stiffness were H3L3-270 and H3L1-270, respectively. The load carrying capacity degradation of members increases with the increase of the localized corrosion ratio, circumferential corrosion ratio and longitudinal corrosion ratio, while decreases with the increase of the eccentricity. The formula proposed can be used to predict the load carrying capacity of locally corroded circular steel tube members under compression.
- Published
- 2021
3. Correction to: Sum Uncertainty Relations Based on (α,β,γ) Weighted Wigner-Yanase-Dyson Skew Information
- Author
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Cong Xu, Zhaoqi Wu, and Shao-Ming Fei
- Subjects
Physics and Astronomy (miscellaneous) ,General Mathematics - Published
- 2022
4. Skew information-based coherence generating power of quantum channels
- Author
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Zhaoqi Wu, Lin Zhang, Shao-Ming Fei, and Jianhui Wang
- Subjects
Quantum Physics ,Modeling and Simulation ,Signal Processing ,FOS: Physical sciences ,Statistical and Nonlinear Physics ,Electrical and Electronic Engineering ,Quantum Physics (quant-ph) ,Computer Science::Information Theory ,Theoretical Computer Science ,Electronic, Optical and Magnetic Materials - Abstract
We study the ability of a quantum channel to generate quantum coherence when it applies to incoherent states. We define the measure of coherence generating power (CGP) for a generic quantum channel to be the average coherence generated by the quantum channel acting on a uniform ensemble of incoherent states based on the skew information-based coherence measure. We present explicitly the analytical formulae of the CGP for any arbitrary finite dimensional unitary channels. We derive the mean value of the CGP over the unitary groups and investigate the typicality of the normalized CGP. Furthermore, we give an upper bound of the CGP for the convex combinations of unitary channels. Detailed examples are provided to calculate exactly the values of the CGP for the unitary channels related to specific quantum gates and for some qubit channels., Comment: 21pages. arXiv admin note: text overlap with arXiv:2101.07427
- Published
- 2022
5. Nonlinear analysis of axial-compressed corroded circular steel pipes reinforced by FRP-casing grouting
- Author
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Hao Fu, Jiayi Zhang, Zhaoqi Wu, Chee-Loong Chin, and Chau-Khun Ma
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Mechanics of Materials ,Metals and Alloys ,Building and Construction ,Civil and Structural Engineering - Published
- 2023
6. Sum uncertainty relations based on $(α,β,γ)$ weighted Wigner-Yanase-Dyson skew information
- Author
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Cong Xu, Zhaoqi Wu, and Shao-Ming Fei
- Subjects
Physics and Astronomy (miscellaneous) ,General Mathematics ,FOS: Physical sciences ,Quantum Physics (quant-ph) - Abstract
We introduce ($α,β,γ$) weighted Wigner-Yanase-Dyson (($α,β,γ$) WWYD) skew information and ($α,β,γ$) modified weighted Wigner-Yanase-Dyson (($α,β,γ$) MWWYD) skew information. We explore the sum uncertainty relations for arbitrary $N$ mutually noncommutative observables based on ($α,β,γ$) WWYD skew information. A series of uncertainty inequalities are derived. We show by detailed example that our results cover and improve the previous ones based on the original Wigner-Yanase (WY) skew information. Finally, we establish new sum uncertainty relations in terms of the ($α,β,γ$) MWWYD skew information for arbitrary $N$ quantum channels., 19 pages, 1 figure
- Published
- 2022
- Full Text
- View/download PDF
7. Quantumness of pure-state ensembles via coherence of Gram matrix based on generalized $α$-$z$-relative Rényi entropy
- Author
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Wendao Yuan, Zhaoqi Wu, and Shao-Ming Fei
- Subjects
Quantum Physics ,Physics and Astronomy (miscellaneous) ,General Mathematics ,FOS: Physical sciences ,Quantum Physics (quant-ph) - Abstract
The Gram matrix of a set of quantum pure states plays key roles in quantum information theory. It has been highlighted that the Gram matrix of a pure-state ensemble can be viewed as a quantum state, and the quantumness of a pure-state ensemble can thus be quantified by the coherence of the Gram matrix [Europhys. Lett. \textbf{134} 30003]. Instead of the $l_1$-norm of coherence and the relative entropy of coherence, we utilize the generalized $\alpha$-$z$-relative R\'enyi entropy of coherence of the Gram matrix to quantify the quantumness of a pure-state ensemble and explore its properties. We show the usefulness of this quantifier by calculating the quantumness of six important pure-state ensembles. Furthermore, we compare our quantumness with other existing ones and show their features as well as orderings., Comment: 18pages,6figures
- Published
- 2022
- Full Text
- View/download PDF
8. The n-th Decay Rate of Coherence for Bell-diagonal States Under Quantum Channels
- Author
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Zhaoqi Wu, Huaijing Huang, and Shao-Ming Fei
- Subjects
Physics ,Quantum Physics ,Kullback–Leibler divergence ,Physics and Astronomy (miscellaneous) ,010308 nuclear & particles physics ,General Mathematics ,Diagonal ,Skew ,FOS: Physical sciences ,Quantum channel ,01 natural sciences ,Amplitude ,Quantum state ,Quantum mechanics ,0103 physical sciences ,Quantum Physics (quant-ph) ,010306 general physics ,Quantum ,Coherence (physics) - Abstract
We study the degree to which the coherence of quantum states is affected by noise. We give the definition of the $n$-th decay rate and investigate the coherence of Bell-diagonal states under $n$ iterations of channels. We derive explicit formulas of the $n$-th decay rates based on $l_1$ norm of coherence, relative entropy of coherence and skew information-based coherence. It is found that the larger $n$ is, the faster the $n$-th decay rate decreases as the parameter $p$ of Bell-diagonal states increases. Moreover, for any fixed $n$, with the increase of $p$, Bell-diagonal states can be completely incoherent under generalized amplitude damping (GAD) channels, depolarization (DEP) channels and phase flip (PF) channels, while this is not the case for bit flip (BF) channels and bit-phase flip (BPF) channels. We also investigate the geometry of the relative entropy of coherence and skew information-based coherence of Bell-diagonal states under different channels when the $n$-th decay rate is one, i.e., the coherence is frozen. It is shown that compared with BF and BPF channels, when $n$ is large enough, the coherence of Bell-diagonal states will not be frozen under GAD, DEP and PF channels. For skew information-based coherence, similar properties of coherence freezing are found.
- Published
- 2020
9. Quantifying the quantumness of ensembles via generalized α-z-relative rényi entropy
- Author
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Chuanxi Zhu, Zhaoqi Wu, Shao-Ming Fei, and Huaijing Huang
- Subjects
Physics and Astronomy (miscellaneous) ,010308 nuclear & particles physics ,General Mathematics ,Monotonic function ,Coherence (statistics) ,01 natural sciences ,Unitary state ,Measure (mathematics) ,Rényi entropy ,0103 physical sciences ,Statistical physics ,Quantum information ,010306 general physics ,Commutative property ,Quantum ,Mathematics - Abstract
Quantifying the quantumness of ensembles is a vital and practical task in quantum information theory. In this paper, we quantify the quantumness of quantum ensembles based on a quantifier of the coherence of ensembles via generalized α-z-relative Renyi entropy. It is shown that this measure satisfies the intuitive and desirable properties which are required by a measure of quantumness, such as positivity, unitary invariance, monotonicity under any commutativity preserving operations and so on. The relationship between our measure and some existing measures for quantumness of quantum ensembles is discussed. Detailed examples are presented to some important ensembles to illustrate the quantumness given by our measure.
- Published
- 2020
10. Confidence Skewing Problem and Its Correction Method in Mimic Arbitration Mechanism
- Author
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Zhaoqi Wu, Jin Wei, Fan Zhang, Wenle Zhou, Wei Guo, and Jiangxing Wu
- Subjects
Correction method ,Network security ,business.industry ,Mechanism (biology) ,Computer science ,Applied Mathematics ,computer.software_genre ,Maintenance engineering ,Arbitration ,Statistical analysis ,Data mining ,Electrical and Electronic Engineering ,Logistic function ,business ,computer - Published
- 2020
11. Uncertainty Relations Based on Modified Wigner-Yanase-Dyson Skew Information
- Author
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Lin Zhang, Xianqing Li-Jost, Jianhui Wang, Shao-Ming Fei, and Zhaoqi Wu
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Physics ,Quantum Physics ,Physics and Astronomy (miscellaneous) ,Relation (database) ,010308 nuclear & particles physics ,General Mathematics ,Skew ,FOS: Physical sciences ,01 natural sciences ,0103 physical sciences ,Core (graph theory) ,Statistical physics ,Quantum information ,Quantum Physics (quant-ph) ,010306 general physics - Abstract
Uncertainty relation is a core issue in quantum mechanics and quantum information theory. We introduce modified generalized Wigner-Yanase-Dyson (MGWYD) skew information and modified weighted generalizedWigner-Yanase-Dyson (MWGWYD) skew information, and establish new uncertainty relations in terms of the MGWYD skew information and MWGWYD skew information., 16 pages
- Published
- 2019
12. Characterizing the quantumness of mixed-state ensembles via the coherence of Gram matrix with generalized α-z-relative Rényi entropy
- Author
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Wendao Yuan, Zhaoqi Wu, and Shao-Ming Fei
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Physics and Astronomy (miscellaneous) ,Instrumentation - Abstract
The Gram matrix of an ensemble of pure states can be regarded as a quantum state, and the quantumness of the ensemble can be quantified by the coherence of the Gram matrix. By using the affinity between mixed states, the concept of Gram matrix of pure-state ensembles can be extended to the one of mixed-state ensembles. By utilizing the generalized α-z-relative Rényi entropy of coherence of Gram matrices, we present a new quantifier of quantumness of mixed-sate ensembles and further reveal its peculiar properties. To illustrate our quantumness of mixed-sate ensembles, we also calculate the quantumness for some detailed mixed-sate ensembles by deriving their analytical formulae.
- Published
- 2022
13. Some new theorems for cyclic contractions in G-metric spaces and some applications
- Author
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Chen Chunfang, Chuanxi Zhu, Min Liang, and Zhaoqi Wu
- Subjects
0209 industrial biotechnology ,Class (set theory) ,Pure mathematics ,Applied Mathematics ,Fixed-point theorem ,020206 networking & telecommunications ,02 engineering and technology ,Fixed point ,Integral equation ,Computational Mathematics ,Metric space ,020901 industrial engineering & automation ,Operator (computer programming) ,Ordinary differential equation ,0202 electrical engineering, electronic engineering, information engineering ,Uniqueness ,Mathematics - Abstract
In this paper, some new theorems for various cyclic contractions are established in Gb-metric spaces to discuss the existence and uniqueness of the solutions for a class of the operator equations, which generalize many known results in corresponding literatures. On the other hand, we introduce the notion of the cyclic α-ψφ-contractive mappings in Gb-metric spaces and establish a new fixed point theorem, which is applied to consider the existence of the solutions of the integral equations and ordinary differential equations. Moreover, some examples are given to support our main results.
- Published
- 2019
14. Some φ-coupled fixed point results via modified F-control function’s concept in metric spaces and its applications
- Author
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Chuanxi Zhu, Yifan Fan, and Zhaoqi Wu
- Subjects
Pure mathematics ,Applied Mathematics ,Fixed-point theorem ,010103 numerical & computational mathematics ,Fixed point ,01 natural sciences ,Integral equation ,Control function ,010101 applied mathematics ,Computational Mathematics ,Metric space ,Matrix (mathematics) ,Monotone polygon ,0101 mathematics ,Mathematics - Abstract
The aim of this paper is to propose a new φ -coupled fixed point theorem for a mixed monotone mapping in a metric space, which is taken no account of the continuity of the mapping. To this end, we introduce the notions of φ -coupled fixed point and modified F -control function. Our obtained results are applied to derive some φ -coupled fixed point theorems in partial metric spaces and quasi-metric spaces, respectively. Some applications to matrix equations and integral equations are also presented so as to illustrate our results.
- Published
- 2019
15. Joint Activity Localization and Recognition with Ultra Wideband based on Machine Learning and Compressed Sensing
- Author
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Yuanchen Zhao, Ruogu Jin, Zhaoqi Wu, Kangnan Dong, Long Cheng, and Wang Yifan
- Subjects
Signal processing ,business.industry ,Computer science ,Ultra-wideband ,020206 networking & telecommunications ,Robotics ,02 engineering and technology ,Machine learning ,computer.software_genre ,Task (project management) ,Real-time locating system ,Activity recognition ,Compressed sensing ,0202 electrical engineering, electronic engineering, information engineering ,020201 artificial intelligence & image processing ,Artificial intelligence ,Joint (audio engineering) ,business ,computer - Abstract
Joint human activity localization and recognition has broad application prospects in human-computer interaction, virtual reality, smart healthcare system, security monitoring and robotics. Ultra-wideband (UWB) is an emerging technology adopted in real-time location system (RTLS) and has shown satisfactory performance in the task of human activity localization. However, few studies have been carried out to simultaneously recognize human activities based on UWB RTLS, which limits the use of UWB RTLS in many applications. In this study, we develop a RTLS based on UWB for the joint task of activity localization and recognition. A compressed sensing-based activity recognition approach is proposed for the task of activity recognition and several machine learning methods are designed to further improve the activity localization accuracy for the task of activity localization. The experimental results show that our UWB RTLS achieves good performance in this joint task.
- Published
- 2021
16. Ultra Wideband Indoor Positioning System based on Artificial Intelligence Techniques
- Author
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Zhaoqi Wu, Anguo Zhao, Bo Lai, Yuanting Wang, Qiang Yang, and Long Cheng
- Subjects
Signal processing ,Multipath interference ,Computer science ,business.industry ,Ultra-wideband ,020206 networking & telecommunications ,Ranging ,02 engineering and technology ,Kalman filter ,Radio navigation ,Field (computer science) ,Indoor positioning system ,0202 electrical engineering, electronic engineering, information engineering ,020201 artificial intelligence & image processing ,Artificial intelligence ,business - Abstract
High-precision indoor positioning has nowadays emerged as a critical function for many applications. However, many existing indoor positioning systems either fail to achieve a high positioning accuracy or are very easily affected by indoor environments composed of many obstacles, preventing them from satisfying many application requirements. Ultra wideband (UWB) has recently drawn extensive attention in the field of indoor positioning due to its great ability to achieve high ranging and localization accuracy while minimizing the effect of multipath interference. Meanwhile, advanced artificial intelligence and signal processing techniques have been explored to improve the precision and performance of indoor positioning system. In this paper, a high-precision UWB indoor positioning system integrating artificial intelligence and signal processing techniques is designed. And field tests are also conducted to validate the design of the system.
- Published
- 2020
17. The mitochondrial calcium uniporter induces apoptosis in cardiomyocytes cultured with high-glucose medium by affecting mitochondrial function
- Author
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Xia Chen, Zhaoqi Wu, Hengqiang Cui, Hui Chen, Tao Zhang, Zhe Jing, Wenyun Guo, Yongqing Chen, and Wenxue Zheng
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Apoptosis ,Chemistry ,High glucose ,Mitochondrial calcium uniporter ,Function (biology) ,Cell biology - Abstract
Background As the number of diabetics worldwide continues to increase, diabetic cardiomyopathy has become one of the main causes of cardiovascular disease risk in diabetic patients. Currently, the pathophysiological mechanism of DCM has not been fully elucidated. In the present study, relevant pathological changes of cardiomyocytes in the high glucose environment were simulated by in vitro culture of rat H9C2 cardiomyocytes, to explore the mechanism by which MCU induces apoptosis in cardiomyocytes. Method: Cultured rat myocardium H9C2 cells in vitro and divided into high glucose group (glucose concentration 33 mmol/L), normal group (glucose concentration 5.5 mmol/L), experimental group (5.5 mmol/L glucose and transfected with MCU siRNA) and control group (5.5 mmol/L glucose and transfected negative control siRNA). Comparative analysis of MCU expression, Ca2+ uptake, mitochondrial function, oxidative stress and apoptosis of two groups of cells. Results (1) Compared with normal group, in the high glucose group the MCU expression of myocardial cells in H9C2 rats decreased, The Ca2+ levels, membrane potential and mitochondrial ATP levels decreased, mitochondrial ROS levels increased, NADH+/NADPH ratio in cardiomyocytes increased, GSH/GSSG ratio decreased, the expression levels of cleaved caspase-3 and cleaved caspase-9 increased, bcl-2 expression decreased, the number of cardiomyocytes apoptotic cells increases. (2) Compared with the normal group and the control group, the experimental group MCU expression of myocardial cells in H9C2 rats decreased, The Ca2+ levels, membrane potential and mitochondrial ATP levels decreased, mitochondrial ROS levels increased, NADH+/NADPH ratio in cardiomyocytes increased, GSH/GSSG ratio decreased, the expression levels of cleaved caspase-3 and cleaved caspase-9 increased, bcl-2 expression decreased, the number of cardiomyocytes apoptotic cells increases. Discussion This study suggested that MCU expression in rat H9C2 cardiomyocytes was decreased in the high glucose environment, causing abnormal mitochondrial calcium uptake and imbalanced calcium homeostasis, which may further contribute to mitochondrial dysfunction and enhanced oxidative stress in cardiomyocytes. Mitochondrial dysfunction and enhanced oxidative stress ultimately led to apoptosis in cardiomyocytes.
- Published
- 2020
18. Power Quality Disturbance Classification based on Adaptive Compressed Sensing and Machine Learning
- Author
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Hao Chang, Shiang Xuanyuan, Zhaoqi Wu, and Long Cheng
- Subjects
Computer science ,business.industry ,Random projection ,Machine learning ,computer.software_genre ,Signal ,k-nearest neighbors algorithm ,ComputingMethodologies_PATTERNRECOGNITION ,Compressed sensing ,Near neighbor ,Power quality ,Classification methods ,Artificial intelligence ,business ,computer ,Curse of dimensionality - Abstract
The application of compressed sensing and machine learning in power quality disturbance (PQD) classification has drawn more and more attention. This paper presents an adaptive compressed sensing and machine learning (ACSML) method to classify both single PQD and combined PQDs with the consideration of the correlation and the sparsity properties in the PQD signals. This method first uses random projection to reduce the dimensionality of the PQD signals. Meanwhile, a simplified near neighbor algorithm is proposed to reduce the size of the required PQD signal training dataset. The PQD classification problem is finally solved using an adaptive compressed sensing classification algorithm. Experiment results show that the proposed ACSML method achieves higher classification accuracy and faster classification speed in classifying PQDs than the other existing compressed sensing based PQD classification methods.
- Published
- 2020
19. Real Time Indoor Positioning System for Smart Grid based on UWB and Artificial Intelligence Techniques
- Author
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Long Cheng, Zhaoqi Wu, Kexin Wang, and Hao Chang
- Subjects
Multipath interference ,business.industry ,Computer science ,020208 electrical & electronic engineering ,010401 analytical chemistry ,Ranging ,02 engineering and technology ,GPS signals ,01 natural sciences ,0104 chemical sciences ,law.invention ,Positioning technology ,Bluetooth ,Smart grid ,Indoor positioning system ,law ,0202 electrical engineering, electronic engineering, information engineering ,Global Positioning System ,Artificial intelligence ,business - Abstract
Indoor positioning system plays an important role in smart grid. Although GPS is the predominant outdoor positioning technology, it is unsuitable to be used in many fields of smart grid for three main reasons: first, signals sent from GPS could easily get blocked by solid materials such as metal or brick; second, the complex electromagnetic interference induced by electrical circuits greatly affects GPS signals; third, GPS can only achieve meter-level real time positioning accuracy, which is far from sufficient for many requirements of smart grid applications. Some other indoor positioning technologies, such as Bluetooth, Wi-Fi, ultrasound, infrared and RFID, fail in either the positioning accuracy, the positioning range, or the positioning speed required in many smart grid applications. Therefore, this paper proposes a real time indoor positioning system for smart gird based on a more promising technology, ultra-wideband (UWB). UWB is suitable for real-time localization in smart grid because UWB has short radio frequency pulse duration and wide bandwidth, which can minimize the effects of multipath interference and allow for high-resolution ranging and easier material penetration. In addition, since high-accuracy position information is required in many smart grid fields, a comprehensive framework integrating several artificial intelligence techniques, including outlier detection, line-of-sight/non-line-of-sight classification, filter design, range measurement correction and maximum likelihood localization estimation, is also proposed to further improve the positioning accuracy. At last, the performance of this system is verified through a series of experiments.
- Published
- 2020
20. Adaptive Compressive Sensing and Machine Learning for Power System Fault Classification
- Author
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Kangnan Dong, Zhaoqi Wu, Rusheng Duan, and Long Cheng
- Subjects
0209 industrial biotechnology ,Computer science ,business.industry ,Random projection ,020206 networking & telecommunications ,02 engineering and technology ,Machine learning ,computer.software_genre ,Fault (power engineering) ,k-nearest neighbors algorithm ,Electric power system ,Statistical classification ,020901 industrial engineering & automation ,Compressed sensing ,0202 electrical engineering, electronic engineering, information engineering ,Artificial intelligence ,business ,Focus (optics) ,computer ,Curse of dimensionality - Abstract
Compressive sensing related methods have achieved success in power system fault classification. However, those methods, either only focus on sparsity without considering the correlation within power system fault signals, or emphasize too much on the correlation but neglect the sparsity property of power system fault signals, resulting in the decrease of classification precision and the increase of the number of training samples needed. In addition, those methods do not explore other machine learning techniques at the same time to further improve the classification accuracy and speed. To overcome the drawbacks and limitations of those methods, this paper proposes an adaptive compressive sensing and machine learning classification framework to quickly and accurately classify power system faults considering both the correlation and the sparsity properties inherited in power system fault signals. First, random projection is applied to reduce the dimensionality of the fault signal. Second, a k-nearest neighbor based algorithm is designed to reduce the number of fault signals needed in the training dataset. Finally, the classification of power system faults is formulated as solving an adaptive L1-norm and L2-norm combined objective function using an alternating direction optimization method. Simulation results and analyses show that the proposed framework has better performance than the existing compressive sensing based power system faulty classification methods in both accuracy and speed.
- Published
- 2020
21. Coherence and complementarity based on modified generalized skew information
- Author
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Shao-Ming Fei, Lin Zhang, Xianqing Li-Jost, and Zhaoqi Wu
- Subjects
Quantum Physics ,Analytical expressions ,Skew ,FOS: Physical sciences ,Statistical and Nonlinear Physics ,01 natural sciences ,Complementarity (physics) ,010305 fluids & plasmas ,Theoretical Computer Science ,Electronic, Optical and Magnetic Materials ,Modeling and Simulation ,Qubit ,0103 physical sciences ,Signal Processing ,Applied mathematics ,Electrical and Electronic Engineering ,Quantum Physics (quant-ph) ,010306 general physics ,Quantum ,Mathematics ,Quantum computer - Abstract
We introduce modified generalized Wigner-Yanase-Dyson (MGWYD) skew information and modified weighted generalized Wigner-Yanase-Dyson (MWGWYD) skew information. By revisiting state-channel interaction based on MGWYD skew information, a family of coherence measures with respect to quantum channels is proposed. Furthermore, explicit analytical expressions of these coherence measures of qubit states are derived with respect to different quantum channels. Moreover, complementarity relations based on MGWYD skew information and MWGWYD skew information are also presented. Specifically, the conservation relations are investigated, while two interpretations of them including symmetry-asymmetry complementarity and wave-particle duality have been proposed., 20pages
- Published
- 2020
22. Regularized Multiset Neighborhood Correlation Analysis for Semi-paired Multiview Learning
- Author
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Jipeng Qiang, Yun-Hao Yuan, Zhaoqi Wu, Jianping Gou, Yun Li, and Yi Zhu
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Multiset ,Paired Data ,business.industry ,Computer science ,Dimensionality reduction ,Feature extraction ,Pattern recognition ,02 engineering and technology ,Overfitting ,020204 information systems ,Correlation analysis ,0202 electrical engineering, electronic engineering, information engineering ,020201 artificial intelligence & image processing ,Artificial intelligence ,Canonical correlation ,business ,Multiview learning - Abstract
Canonical correlation analysis (CCA) is a popular and powerful technique for two-view dimension reduction and feature extraction. But, CCA is not able to directly handle more than two view data and has a rigorous assumption that all the samples from two different views are paired. However, practical multiple view data are often semi-paired. To address this problem, we in this paper propose a novel semi-paired multiview dimension reduction approach, which takes cross-view neighborhood relationship among semi-paired data and within-view global structure information into consideration. The proposed approach can not only deal with multiview (more than two) data, but also take sufficient advantage of unpaired multiview data and then mitigate overfitting effectively caused by the limited paired data. Experimental results on two benchmark data sets demonstrate the effectiveness of our proposed method.
- Published
- 2020
23. Three-component Strategy for Synthesis of Dihydropyrido[2,3-d ]pyrimidine and Spirooxindole Derivatives
- Author
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Hongdie Li, Xiaorong Ren, Chunmei Li, Zhaoqi Wu, Ting Sun, and Furen Zhang
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chemistry.chemical_compound ,Pyrimidine ,chemistry ,010405 organic chemistry ,Component (thermodynamics) ,Stereochemistry ,Organic Chemistry ,010402 general chemistry ,01 natural sciences ,0104 chemical sciences - Published
- 2018
24. Predictive Modeling of Depression with a Large Claim Dataset
- Author
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Zhaoqi Wu, Andrew Heath, Mark L. Homer, Yugang Jia, Riyi Qiu, and Vasu Kodali
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0301 basic medicine ,education.field_of_study ,Actuarial science ,High prevalence ,Population ,Cost approach ,Mental health ,Random forest ,03 medical and health sciences ,030104 developmental biology ,0302 clinical medicine ,Back pain ,medicine ,Leverage (statistics) ,Medical diagnosis ,medicine.symptom ,education ,Psychology ,health care economics and organizations ,030217 neurology & neurosurgery - Abstract
Depression has been a major concern for the employers due to its high prevalence and cost. In United States, 6.8% of the work population had depression and it is accountable for over $100 billion workplace loss every year. Early detection and timely intervention is the key to address this challenge. In this paper, we proposed to leverage a large claim dataset to build depression risk prediction model. This approach is easy to implement and scale because the claim data is accessible for employers at no additional cost. We derived a subset of over 7.2 million patients in a 3-year period, with 2,099 variables including the diagnosis, procedure, medication, and health service provider information. We trained two models (Least Absolute Shrinkage and Selection Operator (LASSO) and random forest *RF)) with first two years data to predict the onset of depression in the third year. Both models achieved the best comparable performance so far according to our knowledge. The important variables identified by our algorithms are mental health related medications and diagnoses (other than depression), gender (female), and other chronic conditions such as back pain. We further validated these variables by confirming in clinical literature. We concluded that the claim data based depression prediction is a viable and low cost approach, especially for self-insured employers.
- Published
- 2019
25. Some results for common fixed point on $\varphi$-contractions in k-partially ordered fuzzy metric space
- Author
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Jiaming Jin, Zhaoqi Wu, Haochen Wu, and Chuanxi Zhu
- Subjects
Least fixed point ,Discrete mathematics ,Algebra and Number Theory ,Injective metric space ,Metric (mathematics) ,Common fixed point ,Product metric ,Fixed-point property ,Analysis ,Intrinsic metric ,Convex metric space ,Mathematics - Published
- 2017
26. Fixed point results for cyclic contractions in Menger PM-spaces and generalized Menger PM-spaces
- Author
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Zhaoqi Wu, Chenggui Yuan, and Chuanxi Zhu
- Subjects
Pure mathematics ,Algebra and Number Theory ,Applied Mathematics ,010102 general mathematics ,Mathematical analysis ,Mathematics::General Topology ,Fixed-point theorem ,Fixed point ,01 natural sciences ,010101 applied mathematics ,Computational Mathematics ,Mathematics::K-Theory and Homology ,Geometry and Topology ,0101 mathematics ,Analysis ,Mathematics - Abstract
In this paper, we introduce the concepts of cyclic $$\varphi $$ -contractions in Menger PM-spaces and cyclic weak $$\phi $$ -contractions in generalized Menger PM-spaces. Based on these concepts, some fixed point results for cyclic $$\varphi $$ -contractions in Menger PM-spaces are obtained. Furthermore, some fixed point theorems for cyclic weak $$\phi $$ -contractions and cyclic $$\varphi $$ -contractions in generalized Menger PM-spaces are obtained by assuming that the number of cyclic sets is odd. An example is also given to show the validity of our main results.
- Published
- 2017
27. New multipled common fixed point theorems in Menger PMT-spaces
- Author
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Cuiru Ji, Zhaoqi Wu, and Chuanxi Zhu
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Discrete mathematics ,Algebra and Number Theory ,Common fixed point ,Analysis ,Mathematics - Published
- 2017
28. Fixed point results for (α,η,ψ,ξ)-contractive multi-valued mappings in Menger PM-spaces and their applications
- Author
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Zhaoqi Wu, Chuanxi Zhu, and Chenggui Yuan
- Subjects
010101 applied mathematics ,Pure mathematics ,General Mathematics ,010102 general mathematics ,0101 mathematics ,Fixed point ,01 natural sciences ,Multi valued ,Mathematics - Abstract
In this paper, we obtain some new fixed point theorems for (?,?,?,?) -contractive multi-valued mappings in ?-?-T-complete Menger PM-spaces, which turn out to generalize many results in existing literatures. Some examples are also given to illustrate the definition and support our new results. Moreover, some interesting fixed point results endowed with binary relations or graphs are derived as applications of our main results.
- Published
- 2017
29. Fixed points of the multifunction concerning F -contractions in partial metric spaces
- Author
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Zhaoqi Wu, Chuanxi Zhu, and Qianwen Yu
- Subjects
Pure mathematics ,Metric space ,Algebra and Number Theory ,Fixed point ,Analysis ,Mathematics - Published
- 2016
30. Heterogeneous Executors Scheduling Algorithm for Mimic Defense Systems
- Author
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Zhaoqi Wu and Jin Wei
- Subjects
Service quality ,Computer science ,Random seed ,Quality of service ,Distributed computing ,0202 electrical engineering, electronic engineering, information engineering ,Arbiter ,020206 networking & telecommunications ,02 engineering and technology ,Executor ,Dynamic balance ,020202 computer hardware & architecture ,Scheduling (computing) - Abstract
A key aspect of the mimetic defense system is the scheduling of heterogeneous executions to ensure that the system is dynamic. The existing scheduling strategy only performs random scheduling to satisfy heterogeneity and service quality. Combined with the historical information of the arbiter in the mimicry defense system, this paper proposed a random seed scheduling algorithm based on historical confidence for maximum heterogeneity and quality of service. First, the seed performer is randomly selected in the historical confidence executor that satisfies the threshold, and then the scheduling scheme is determined according to the maximum heterogeneity type and the quality of service indicator. The simulation results showed that the scheduling period of the algorithm is lower than the random scheduling algorithm. However, the scheduling effect is higher than the random scheduling algorithm, which achieved a good dynamic balance between dynamics, security, and quality of service.
- Published
- 2019
31. Coupled Coincidence Point and Fixed Point Results for Mixed Monotone Mappings and an Application to Integro-differential Equations
- Author
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Chuanxi Zhu, Zhaoqi Wu, Yifan Fan, and Youqing Shen
- Subjects
Differential equation ,General Mathematics ,010102 general mathematics ,Mathematical analysis ,Fixed-point theorem ,Fixed point ,01 natural sciences ,010101 applied mathematics ,Monotone polygon ,Initial value problem ,Uniqueness ,0101 mathematics ,Coincidence point ,Mathematics - Abstract
In this paper, we propose some new coupled coincidence point and fixed point theorems for the mappings F and g. Our results are obtained by exploring the corresponding initial value problems for the mapping F and weakening the involved contractive conditions. As an application, we study the existence and uniqueness of solution to integro-differential equations.
- Published
- 2019
32. Integration and Functionalization of Spatial Boundaries-A Case Study of Macau University of Science of Technology
- Author
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Lei Ding, Zhaoqi Wu, Yan Hui, and Jie Tang
- Subjects
Engineering ,business.industry ,Boundary (topology) ,Surface modification ,business ,Engineering physics - Published
- 2019
33. Deep Learning Models for Facial Expression Recognition
- Author
-
Quan Wen, Atul Sajjanhar, and ZhaoQi Wu
- Subjects
Deep cnn ,Computer science ,business.industry ,Deep learning ,ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION ,Cognitive neuroscience of visual object recognition ,Pattern recognition ,02 engineering and technology ,010501 environmental sciences ,01 natural sciences ,Facial recognition system ,ComputingMethodologies_PATTERNRECOGNITION ,Facial expression recognition ,Face (geometry) ,0202 electrical engineering, electronic engineering, information engineering ,Benchmark (computing) ,020201 artificial intelligence & image processing ,Artificial intelligence ,Transfer of learning ,business ,0105 earth and related environmental sciences - Abstract
We investigate facial expression recognition using state-of-the-art classification models. Recently, CNNs have been extensively used for face recognition. However, CNNs have not been thoroughly evaluated for facial expression recognition. In this paper, we train and test a CNN model for facial expression recognition. The performance of the CNN model is used as benchmark for evaluating other pre-trained deep CNN models. We evaluate the performance of Inception and VGG which are pre-trained for object recognition, and compare these with VGG-Face which is pre-trained for face recognition. All experiments are performed on publicly available face databases, namely, CK+, JAFFE and FACES.
- Published
- 2018
34. Analytical Model for Initial Rotational Stiffness of Steel Beam to Concrete-Filled Steel Tube Column Connections with Bidirectional Bolts
- Author
-
Dongsheng Li, Jinping Ou, Zhaoqi Wu, Yonghui An, and Zhou Guojie
- Subjects
Materials science ,business.industry ,Mechanical Engineering ,0211 other engineering and technologies ,Stiffness ,020101 civil engineering ,02 engineering and technology ,Building and Construction ,Structural engineering ,Column (database) ,0201 civil engineering ,Mechanics of Materials ,021105 building & construction ,medicine ,Steel tube ,General Materials Science ,Current (fluid) ,medicine.symptom ,business ,Beam (structure) ,Civil and Structural Engineering - Abstract
The initial rotational stiffness of connections is important for the design of semirigid frames. However, most current studies on steel beam to concrete-filled steel tube column connections...
- Published
- 2018
35. Some new fixed point theorems in generalized probabilistic metric spaces
- Author
-
Chuanxi Zhu, Zhaoqi Wu, and Cuiru Ji
- Subjects
Discrete mathematics ,Metric space ,Algebra and Number Theory ,Probabilistic logic ,Fixed-point theorem ,Analysis ,Mathematics - Published
- 2016
36. Some new coupled fixed point theorems in partially ordered complete probabilistic metric spaces
- Author
-
Chuanxi Zhu, Zhaoqi Wu, Qiang Tu, and Xiaohuan Mu
- Subjects
010101 applied mathematics ,Metric space ,Pure mathematics ,Algebra and Number Theory ,010102 general mathematics ,Probabilistic logic ,Fixed-point theorem ,0101 mathematics ,01 natural sciences ,Analysis ,Mathematics - Published
- 2016
37. Common fixed point theorems for compatible and weakly compatible maps in Menger probabilistic G-metric spaces
- Author
-
Chuanxi Zhu, Zhaoqi Wu, and Xiaohuan Mu
- Subjects
Metric space ,Pure mathematics ,Algebra and Number Theory ,Weakly compatible ,Probabilistic logic ,Common fixed point ,Analysis ,Mathematics - Published
- 2016
38. Random quadruple coincidence points theorems for sequence of random mappings and application
- Author
-
Xiaofang Yan, Chuanxi Zhu, and Zhaoqi Wu
- Subjects
Algebra and Number Theory ,Analysis - Published
- 2016
39. The solutions of a class of operator equations based on different inequality
- Author
-
Zhaoqi Wu, Chuanxi Zhu, and Xiaofang Yan
- Subjects
Algebra ,Class (set theory) ,Algebra and Number Theory ,Operator (computer programming) ,Inequality ,media_common.quotation_subject ,Analysis ,media_common ,Mathematics - Published
- 2016
40. Wave-Packet Collapse Based on Weak Repeatability or Covariant Condition
- Author
-
Jianhui Wang, Chuanxi Zhu, and Zhaoqi Wu
- Subjects
Physics ,Classical mechanics ,Physics and Astronomy (miscellaneous) ,Wave packet ,0103 physical sciences ,Collapse (topology) ,Covariant transformation ,Repeatability ,010306 general physics ,Unitary evolution ,01 natural sciences ,010305 fluids & plasmas ,Mathematical physics - Abstract
The conflict between the dynamics postulate (unitary evolution) and the measurement postulate (wave-packet collapse) of quantum mechanics has been reconciled by Zurek from an information transfer perspective [Phys. Rev. A 76 (2007) 052110], and has further been extended to a more general scenario [Phys. Rev. A 87 (2013) 052111]. In this paper, we reconsider Zurek's new derivation by using weak repeatability postulate or covariant condition instead of repeatability postulate.
- Published
- 2016
41. Some new fixed point theorems for single and set-valued admissible mappings in Menger PM-spaces
- Author
-
Chuanxi Zhu, Zhaoqi Wu, and Xiaozhi Zhang
- Subjects
Discrete mathematics ,Algebra and Number Theory ,Applied Mathematics ,010102 general mathematics ,Fixed-point theorem ,Fixed point ,Type (model theory) ,01 natural sciences ,Integral equation ,010101 applied mathematics ,Set (abstract data type) ,Computational Mathematics ,Alpha (programming language) ,Geometry and Topology ,0101 mathematics ,Analysis ,Mathematics - Abstract
In this paper, the new concepts of \(\alpha \)-admissible mappings with respect to \(\eta \) in single-valued case and \(\alpha _{*}\)-admissible mappings with respect to \(\eta _{*}\) in set-valued case in Menger PM-spaces are introduced, and some new fixed point results for both single-valued and set-valued mappings under certain contractive conditions are studied, which extend and generalize some results in corresponding literatures. Some examples are provided to illustrate the validity of our main results, and an application is also given to discuss the existence of solution for Volterra type integral equations.
- Published
- 2015
42. Common coupled fixed point results for probabilistic φ -contractions in Menger PGM-spaces
- Author
-
Zhaoqi Wu, Xiaohuan Mu, and Chuanxi Zhu
- Subjects
Pure mathematics ,Algebra and Number Theory ,Probabilistic logic ,Fixed point ,Analysis ,Mathematics - Published
- 2015
43. Common fixed point theorems under strict contractive conditions in Menger probabilistic G-metric spaces
- Author
-
Qiang Tu, Zhaoqi Wu, and Chuanxi Zhu
- Subjects
Discrete mathematics ,Metric space ,Algebra and Number Theory ,Common fixed point ,Probabilistic logic ,Analysis ,Mathematics - Published
- 2015
44. Information transfer in generalized probabilistic theories
- Author
-
Jianhui Wang, Shunlong Luo, Zhaoqi Wu, and Chuanxi Zhu
- Subjects
Condensed Matter::Quantum Gases ,Physics ,Information transfer ,Unitarity ,media_common.quotation_subject ,Probabilistic logic ,General Physics and Astronomy ,Fidelity ,Collapse (topology) ,Zero (linguistics) ,Extension (metaphysics) ,Point (geometry) ,Statistical physics ,media_common - Abstract
The tension between unitarity and wave-packet collapse is an annoying problem in quantum mechanics, while a breakthrough was made by Zurek recently from the point of view of information transfer. In this paper, we reconsider Zurek's derivation in the setting of generalized probabilistic theories (GPT), and establish that actionable information about a system can be repeatedly passed on to other systems only when the chosen states of the system have mutual zero fidelity. This may be interpreted as an extension of Zurek's result to GPT.
- Published
- 2015
45. Study on New Bolted T-Stub Connection with Inserted Plates under Axial and Cyclic Loads
- Author
-
Zhaoqi Wu and Xiaoming Zhu
- Subjects
Fabrication ,Materials science ,experimental research ,0211 other engineering and technologies ,020101 civil engineering ,energy dissipation capacity ,02 engineering and technology ,Welding ,Flange ,lcsh:Technology ,0201 civil engineering ,law.invention ,lcsh:Chemistry ,law ,optimum width of plates ,021105 building & construction ,Ultimate tensile strength ,medicine ,General Materials Science ,lcsh:QH301-705.5 ,Instrumentation ,Fluid Flow and Transfer Processes ,lcsh:T ,business.industry ,Process Chemistry and Technology ,General Engineering ,Stiffness ,hysteretic behavior ,Structural engineering ,Dissipation ,lcsh:QC1-999 ,mechanical model ,Computer Science Applications ,Stub (electronics) ,T-stub connection ,lcsh:Biology (General) ,lcsh:QD1-999 ,lcsh:TA1-2040 ,inserted plates ,medicine.symptom ,lcsh:Engineering (General). Civil engineering (General) ,business ,failure mode ,Failure mode and effects analysis ,lcsh:Physics - Abstract
The bolted T-stub connection joining beam with column is being widely applied. To enhance the energy dissipation capacity of conventional T-stub connections, two rectangular plates are proposed to be inserted between the T-stub and column, so that the T-stub flange can yield both under tensile and compressive loads. This study put forward a mechanical model of a new T-stub connection with inserted plates and investigated important factors that could affect its mechanical behavior through experimental tests. Thirty specimens were designed with different configurations that differed according to the existence or absence of inserted plates, the fabrication method and the width of inserted plates. These configurations were tested under axial and cyclic loading conditions, and results showed that the proposal aiming to improve the energy dissipation capacity was feasible. The mechanical model presented coincided with the test observation and data. The advent of two inserted plates elevated the load bearing capacity, stiffness and ductility of connections under compression, whereas in tension the properties were not substantially enhanced. The welded T-stub connections outperformed those cut from standard section steel. The energy dissipated by connections with inserted plates was about 150% of that by traditional connections without inserted plates. Only within a reasonable range can the increment of plate width promote the energy dissipation capacity of T-stub connections. The optimum width of plates in terms of energy consumption accounted for around 31% of the overall width of connections.
- Published
- 2020
46. Mechanical Behavior of Circular Steel Tubular Beam-Columns Corroded Uniformly in Atmospheric Environment
- Author
-
Xintao Wang, Shao-Fei Jiang, Huang Chao, Zhaoqi Wu, and Yuan Wei
- Subjects
Ultimate load ,Materials science ,media_common.quotation_subject ,experimental research ,0211 other engineering and technologies ,02 engineering and technology ,engineering.material ,lcsh:Technology ,Corrosion ,lcsh:Chemistry ,Coating ,load carrying capacity prediction ,021105 building & construction ,medicine ,General Materials Science ,Eccentricity (behavior) ,Composite material ,lcsh:QH301-705.5 ,Instrumentation ,media_common ,Fluid Flow and Transfer Processes ,lcsh:T ,Process Chemistry and Technology ,General Engineering ,atmospheric environment ,Stiffness ,021001 nanoscience & nanotechnology ,Load carrying ,lcsh:QC1-999 ,Computer Science Applications ,uniform corrosion ,lcsh:Biology (General) ,lcsh:QD1-999 ,Buckling ,lcsh:TA1-2040 ,engineering ,circular steel tube ,medicine.symptom ,lcsh:Engineering (General). Civil engineering (General) ,0210 nano-technology ,lcsh:Physics ,Beam (structure) - Abstract
Circular steel tube members with the absence of anticorrosive protection or coating failure are prone to uniform corrosion, which threatens the reliability and safety of members in the atmospheric environment. To fully study the mechanical behavior of uniformly corroded circular steel tubes, compression test and theoretical analysis were conducted, and two methods considering section reduction and material degradation, respectively, were adopted for the calculation of ultimate load carrying capacities of specimens. The results indicate that uniform corrosion did not change the failure modes of specimens, and all of them belonged to global buckling failure. The load carrying capacities and stiffness of specimens decreased with the increase of corrosion ratio, and the degree of reduction was greater than that of material degradation, showing a linear relationship with the corrosion rate. Under the same corrosion ratio, the specimens with larger eccentricity represented more obvious load carrying capacity and stiffness degradation. The load carrying capacities predicted by both methods were in good agreement with the test results and had a certain safety margin. The conservative degree of calculation results from three specifications followed a descending order of ANSI/AISC 360-16, GB 50017-2017, and EN 1993-1-1. Under the same corrosion ratio, the load carrying capacity variation of specimens between one-sided corrosion and two-sided corrosion was less than 3%.
- Published
- 2020
47. Experimental study on axially compressed square RC stub columns strengthened with prestressed CFRP strips
- Author
-
Hua Li, Han Liu, Bin Han, Shengping Wu, and Zhaoqi Wu
- Subjects
Materials science ,business.industry ,law ,Structural engineering ,STRIPS ,business ,Axial symmetry ,Stub (electronics) ,law.invention - Abstract
Five square reinforced concrete (RC) stub columns were fabricated and experimental tested under an axial compression load in order to study the effectiveness of strengthening by using prestressed carbon fiber reinforced polymer (CFRP) strips. The specimens tested included one un-strengthened and four strengthened. Three specimens were strengthened by using prestressed strips, and the other one strengthened by using non-prestressed was used to compare. The prestress of the strip was achieved by tensed using a special device before it was pasted to the column. The experimental data such as the failure modes, load-displacement curves and strain distribution of CFRP strips were obtained. The effects of prestress magnitude of CFRP strips on the ultimate bearing capacity and deformation capacity of the specimens were analyzed. The results show that the prestress of CFRP strips can effectively increase the ultimate capacity and delay the crack occurrence of the specimens. And ultimate strain, plastic deformation of the specimens were also improved with increase of prestress magnitude of strip.
- Published
- 2020
48. From Traditional Culture to Lifestyle - A Case Study on Local Specialties in the Lingnan Area
- Author
-
Xiao Song, Jie Tang, Jie Shen, and Zhaoqi Wu
- Subjects
Creative design ,Market research ,Product design ,business.industry ,Humanity ,Context (language use) ,Marketing ,business - Abstract
Local specialties or souvenirs are called ‘shouxin’ in the Lingnan area. Through market research on a number of shouxin enterprises in Zhuhai, this thesis contrasts different products of the same type investigated with multi-dimensional analysis, and summarizes the features and benefits of the various products. Referring to theories and experience of cultural innovation in Taiwan especially the design context “building a brand on the basis of culture and using it in daily life in the form of a specific product”, it proposes that souvenir enterprises in Zhuhai could take humanity as the core of its creative design and culture as the basis. It constructs a development strategy and framework of creative design for local shouxin enterprises in Zhuhai.
- Published
- 2018
49. Influence of Song Porcelain Aesthetics on Modern Product Design
- Author
-
Jei Ling, Xiao Song, Li Ouyang, and Zhaoqi Wu
- Subjects
Craft ,White (horse) ,Product design ,Design styles ,Aesthetics ,media_common.quotation_subject ,Perfection ,Charisma ,Product (category theory) ,Art ,China ,media_common - Abstract
Based on the aesthetic conclusions from works on Ding white porcelain of Song dynasty, this paper is intended to illustrate the relationship between design and culture symbols by studying a case on the design of a culturally creative product combining cultural icons derived from both the aesthetic perfection of white porcelain and modern products. Ding white porcelain of Song dynasty is one of the most prominent products in the history of Chinese porcelain craft. The purpose of this study is to expound that the design styles of modern culturally creative products in China should be based on the heritage of China porcelain aesthetics, and uniquely integrate both fascination of ancient culture and the charisma of modern times, and that the design of porcelain products should be stemmed from culture. Therefore, the purpose of this paper is to build up a theoretical frame for designers to follow in their design of culturally creative porcelain products, and to explicitly discuss on cross-cultural communication and propagation and the Chinese porcelain culture as the foundation of modern porcelain products design.
- Published
- 2018
50. Experimental evaluation of facial expression recognition
- Author
-
Juan Chen, Reziwanguli Xiamixiding, ZhaoQi Wu, Quan Wen, and Atul Sajjanhar
- Subjects
Artificial neural network ,Pixel ,business.industry ,Computer science ,Deep learning ,Feature extraction ,ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION ,Pattern recognition ,02 engineering and technology ,01 natural sciences ,Facial recognition system ,Convolutional neural network ,Active appearance model ,010309 optics ,Facial Action Coding System ,ComputingMethodologies_PATTERNRECOGNITION ,Feature (computer vision) ,0103 physical sciences ,0202 electrical engineering, electronic engineering, information engineering ,020201 artificial intelligence & image processing ,Artificial intelligence ,business - Abstract
We investigate facial expression recognition based on geometric features, and image appearance, using a range of classifier models. First, we evaluate expression recognition of face images based on geometric features, namely, facial landmarks based on the Active Appearance Model, and Action Units based on the Facial Action Coding System. A generalized linear model and a neural network are used to classify face images based on these geometric features. Second, the classification achieved by facial landmarks and Action Units is compared with the classification achieved by convolutional neural network (CNN) which extracts image features from raw pixels. Finally, we use transfer learning technique to evaluate classification using a pre-trained model. All experiments are performed on the state-of-the-art CK+ face database.
- Published
- 2017
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