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< Page ,Total 247 >
Particle swarm Optimized Density-based Clustering and Classification: Supervised and unsupervised learning approaches EI SCIE
期刊论文 | 2019 , 44 , 876-896 | Swarm and Evolutionary Computation
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Abstract :

Two pattern recognition technologies in the field of machine learning, clustering and classification, have been applied in many domains. Density-based clustering is an essential clustering algorithm. The best known density-based clustering method is Density-Based Spatial Clustering of Applications with Noise (DBSCAN), which can find arbitrary shaped clusters in datasets. DBSCAN has three drawbacks: firstly, the parameters for DBSCAN are hard to set; secondly, the number of clusters cannot be controlled by the users; and thirdly, DBSCAN cannot directly be used as a classifier. In this paper a novel Particle swarm Optimized Density-based Clustering and Classification (PODCC) is proposed, designed to offset the drawbacks of DBSCAN. Particle Swarm Optimization (PSO), a widely used Evolutionary and Swarm Algorithm (ESA), has been applied in optimization problems in different research domains including data analytics. In PODCC, a variant of PSO, SPSO-2011, is used to search the parameter space so as to identify the best parameters for density-based clustering and classification. PODCC can function in terms of both Supervised and Unsupervised Learnings by applying the appropriate fitness functions proposed in this paper. With the proposed fitness function, users can set the number of clusters as input for PODCC. The proposed method was evaluated by testing ten synthetic datasets and ten benchmarking datasets selected from various open sources. The experimental results indicate that the proposed PODCC can perform better than some established methods, especially with respect to imbalanced datasets. © 2018 The Authors

Keyword :

Appropriate fitness function Density-based Clustering Density-based spatial clustering of applications with noise Imbalanced dataset Optimization problems Parameter-tuning Pattern recognition technologies Supervised and unsupervised learning

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GB/T 7714 Guan, Chun , Yuen, Kevin Kam Fung , Coenen, Frans . Particle swarm Optimized Density-based Clustering and Classification: Supervised and unsupervised learning approaches [J]. | Swarm and Evolutionary Computation , 2019 , 44 : 876-896 .
MLA Guan, Chun 等. "Particle swarm Optimized Density-based Clustering and Classification: Supervised and unsupervised learning approaches" . | Swarm and Evolutionary Computation 44 (2019) : 876-896 .
APA Guan, Chun , Yuen, Kevin Kam Fung , Coenen, Frans . Particle swarm Optimized Density-based Clustering and Classification: Supervised and unsupervised learning approaches . | Swarm and Evolutionary Computation , 2019 , 44 , 876-896 .
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Forecasting Based Power Ramp-Rate Control Strategies For Utility-Scale PV Systems EI SCIE
期刊论文 | 2019 , 66 (3) , 1862-1871 | IEEE Transactions on Industrial Electronics
WoS CC Cited Count: 1
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Abstract :

Passing cloud results in rapid changes of irradiance. The intermittency of PV power output has drawn serious concern especially for utility-scale PV systems. Consequently, power ramp-rate control (PRRC) has been introduced to avoid significant PV power fluctuations. The PRRC algorithm is usually implemented either by curtailing active power output or implementing energy storage system (ESS). However, the latest active power curtailment (APC) cannot deal with the irradiance ramp-down fluctuations, and the high cost of ESS is still hindering its extensive application. In this paper, two innovative PRRC strategies are presented, which utilize the short-term forecasting. The first solution does not require any ESS, during the power ramp-down event, the PV generation will be curtailed before the actual shading occurs. The second solution requires only one-quarter of the energy capacity of the conventional ESS control strategy. To provide the PV generation forecasts, a dynamic model based on spatio-temporal theory is formulated. The effectiveness of the proposed forecasting model and control strategies have been verified through experiment and case studies. IEEE

Keyword :

Active power Active power output Control strategies Energy storage systems Forecasting modeling Power ramp rates Short-term forecasting Solar forecasting

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GB/T 7714 Chen, Xiaoyang , Du, Yang , Wen, Huiqing et al. Forecasting Based Power Ramp-Rate Control Strategies For Utility-Scale PV Systems [J]. | IEEE Transactions on Industrial Electronics , 2019 , 66 (3) : 1862-1871 .
MLA Chen, Xiaoyang et al. "Forecasting Based Power Ramp-Rate Control Strategies For Utility-Scale PV Systems" . | IEEE Transactions on Industrial Electronics 66 . 3 (2019) : 1862-1871 .
APA Chen, Xiaoyang , Du, Yang , Wen, Huiqing , Jiang, Lin , Xiao, Weidong . Forecasting Based Power Ramp-Rate Control Strategies For Utility-Scale PV Systems . | IEEE Transactions on Industrial Electronics , 2019 , 66 (3) , 1862-1871 .
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Guided Policy Search for Sequential Multitask Learning EI SCIE
期刊论文 | 2019 , 49 (1) , 216-226 | IEEE Transactions on Systems, Man, and Cybernetics: Systems
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Abstract :

Policy search in reinforcement learning (RL) is a practical approach to interact directly with environments in parameter spaces, that often deal with dilemmas of local optima and real-time sample collection. A promising algorithm, known as guided policy search (GPS), is capable of handling the challenge of training samples using trajectory-centric methods. It can also provide asymptotic local convergence guarantees. However, in its current form, the GPS algorithm cannot operate in sequential multitask learning scenarios. This is due to its batch-style training requirement, where all training samples are collectively provided at the start of the learning process. The algorithm's adaptation is thus hindered for real-time applications, where training samples or tasks can arrive randomly. In this paper, the GPS approach is reformulated, by adapting a recently proposed, lifelong-learning method, and elastic weight consolidation. Specifically, Fisher information is incorporated to impart knowledge from previously learned tasks. The proposed algorithm, termed sequential multitask learning-GPS, is able to operate in sequential multitask learning settings and ensuring continuous policy learning, without catastrophic forgetting. Pendulum and robotic manipulation experiments demonstrate the new algorithms efficacy to learn control policies for handling sequentially arriving training samples, delivering comparable performance to the traditional, and batch-based GPS algorithm. In conclusion, the proposed algorithm is posited as a new benchmark for the real-time RL and robotics research community. IEEE

Keyword :

Catastrophic forgetting Elastic weight consolidation (EWC) Multitask learning Policy search Real-time application Robotic manipulation Task analysis Training requirement

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GB/T 7714 Xiong, Fangzhou , Sun, Biao , Yang, Xu et al. Guided Policy Search for Sequential Multitask Learning [J]. | IEEE Transactions on Systems, Man, and Cybernetics: Systems , 2019 , 49 (1) : 216-226 .
MLA Xiong, Fangzhou et al. "Guided Policy Search for Sequential Multitask Learning" . | IEEE Transactions on Systems, Man, and Cybernetics: Systems 49 . 1 (2019) : 216-226 .
APA Xiong, Fangzhou , Sun, Biao , Yang, Xu , Qiao, Hong , Huang, Kaizhu , Hussain, Amir et al. Guided Policy Search for Sequential Multitask Learning . | IEEE Transactions on Systems, Man, and Cybernetics: Systems , 2019 , 49 (1) , 216-226 .
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Cross-modality interactive attention network for multispectral pedestrian detection EI
期刊论文 | 2019 , 50 , 20-29 | Information Fusion
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Multispectral pedestrian detection is an emerging solution with great promise in many around-the-clock applications, such as automotive driving and security surveillance. To exploit the complementary nature and remedy contradictory appearance between modalities, in this paper, we propose a novel cross-modality interactive attention network that takes full advantage of the interactive properties of multispectral input sources. Specifically, we first utilize the color (RGB) and thermal streams to build up two detached feature hierarchy for each modality, then by taking the global features, correlations between two modalities are encoded in the attention module. Next, the channel responses of halfway feature maps are recalibrated adaptively for subsequent fusion operation. Our architecture is constructed in the multi-scale format to better deal with different scales of pedestrians, and the whole network is trained in an end-to-end way. The proposed method is extensively evaluated on the challenging KAIST multispectral pedestrian dataset and achieves state-of-the-art performance with high efficiency. © 2018

Keyword :

Automotive driving Cross modality Feature hierarchies Interactive properties Modality Fusion Pedestrian detection Security surveillance State-of-the-art performance

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GB/T 7714 Zhang, Lu , Liu, Zhiyong , Zhang, Shifeng et al. Cross-modality interactive attention network for multispectral pedestrian detection [J]. | Information Fusion , 2019 , 50 : 20-29 .
MLA Zhang, Lu et al. "Cross-modality interactive attention network for multispectral pedestrian detection" . | Information Fusion 50 (2019) : 20-29 .
APA Zhang, Lu , Liu, Zhiyong , Zhang, Shifeng , Yang, Xu , Qiao, Hong , Huang, Kaizhu et al. Cross-modality interactive attention network for multispectral pedestrian detection . | Information Fusion , 2019 , 50 , 20-29 .
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A novel beta parameter based fuzzy-logic controller for photovoltaic MPPT application EI SCIE
期刊论文 | 2019 , 130 , 416-427 | Renewable Energy
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Abstract :

In this paper, a novel beta parameter three-input one-output fuzzy-logic based maximum power point tracking (MPPT) algorithm is presented for the photovoltaic (PV) system application. The conventional fuzzy-logic controllers (FLCs) exhibit obvious limitations such as their dependence on the user's knowledge about the system and complicated rules. Furthermore, they show inherent dilemma between the rules number of FLC and the universality for various operating conditions, which is revealed and explained with details in this paper. Thus, a novel FLC is proposed by introducing a third input: an intermediate variable β. It can simplify the fuzzy rule membership functions and cover wider operating conditions. The dependence on the user's knowledge about the system is reduced. The converging speed for transients is improved and oscillations around the MPPs are completely eliminated compared with conventional MPPT methods. Typical operation conditions such as varying solar irradiation and load resistance are tested for fair comparison of various algorithms. An experimental prototype was designed and main experimental results were presented to verify the advantages of the proposed algorithm. © 2018 Elsevier Ltd

Keyword :

Beta parameter Fuzzy logic controller (FLC) Maximum Power Point Tracking Photovoltaic systems Zero oscillation

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GB/T 7714 Li, Xingshuo , Wen, Huiqing , Hu, Yihua et al. A novel beta parameter based fuzzy-logic controller for photovoltaic MPPT application [J]. | Renewable Energy , 2019 , 130 : 416-427 .
MLA Li, Xingshuo et al. "A novel beta parameter based fuzzy-logic controller for photovoltaic MPPT application" . | Renewable Energy 130 (2019) : 416-427 .
APA Li, Xingshuo , Wen, Huiqing , Hu, Yihua , Jiang, Lin . A novel beta parameter based fuzzy-logic controller for photovoltaic MPPT application . | Renewable Energy , 2019 , 130 , 416-427 .
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Extensions of a result by G. Talenti to (p,q)-Laplace equations EI SCIE
期刊论文 | 2019 , 180 , 41-51 | Nonlinear Analysis, Theory, Methods and Applications
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We prove a comparison result for solutions to (p,q)-Laplace equation via Schwarz symmetrization. For the p-Laplace equation, the corresponding result is due to Giorgio Talenti. In a special (radial) case we also prove a reverse comparison result. © 2018

Keyword :

Comparison result Laplacians P-Laplace equations Schwarz symmetrization Symmetrization

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GB/T 7714 Emamizadeh, Behrouz , Liu, Yichen , Porru, Giovanni . Extensions of a result by G. Talenti to (p,q)-Laplace equations [J]. | Nonlinear Analysis, Theory, Methods and Applications , 2019 , 180 : 41-51 .
MLA Emamizadeh, Behrouz et al. "Extensions of a result by G. Talenti to (p,q)-Laplace equations" . | Nonlinear Analysis, Theory, Methods and Applications 180 (2019) : 41-51 .
APA Emamizadeh, Behrouz , Liu, Yichen , Porru, Giovanni . Extensions of a result by G. Talenti to (p,q)-Laplace equations . | Nonlinear Analysis, Theory, Methods and Applications , 2019 , 180 , 41-51 .
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STAU1 binds to IBDV genomic double-stranded RNA and promotes viral replication via attenuation of MDA5-dependent β interferon induction. PubMed SCIE
期刊论文 | 2019 , 33 (1) , 286-300 | FASEB journal : official publication of the Federation of American Societies for Experimental Biology
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Infectious bursal disease virus (IBDV) infection triggers the induction of type I IFN, which is mediated by melanoma differentiation-associated protein 5 recognition of the viral genomic double-stranded RNA (dsRNA). However, the mechanism of IBDV overcoming the type I IFN antiviral response remains poorly characterized. Here, we show that IBDV genomic dsRNA selectively binds to the host cellular RNA binding protein Staufen1 (STAU1) in vitro and in vivo. The viral dsRNA binding region was mapped to the N-terminal moiety of STAU1 (residues 1-468). Down-regulation of STAU1 impaired IBDV replication and enhanced IFN-β transcription in response to IBDV infection, while having little effect on the viral attachment to the host cells and cellular entry. Conversely, overexpression of STAU1 but not the IBDV dsRNA-binding deficient STAU1 mutant (469-702) led to a suppression of IBDV dsRNA-induced IFN-β promoter activity. Moreover, we found that the binding of STAU1 to IBDV dsRNA decreased the association of melanoma differentiation-associated protein 5 but not VP3 with the IBDV dsRNA in vitro. Finally, we showed that STAU1 and VP3 suppressed IFN-β gene transcription in response to IBDV infection in an additive manner. Collectively, these findings provide a novel insight into the evasive strategies used by IBDV to escape the host IFN antiviral response.-Ye, C., Yu, Z., Xiong, Y., Wang, Y., Ruan, Y., Guo, Y., Chen, M., Luan, S., Zhang, E., Liu, H. STAU1 binds to IBDV genomic double-stranded RNA and promotes viral replication via attenuation of MDA5-dependent β interferon induction.

Keyword :

RIG-I–like receptors RNA-binding protein innate antiviral response

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GB/T 7714 Ye Chengjin , Yu Zhaoli , Xiong Yiwei et al. STAU1 binds to IBDV genomic double-stranded RNA and promotes viral replication via attenuation of MDA5-dependent β interferon induction. [J]. | FASEB journal : official publication of the Federation of American Societies for Experimental Biology , 2019 , 33 (1) : 286-300 .
MLA Ye Chengjin et al. "STAU1 binds to IBDV genomic double-stranded RNA and promotes viral replication via attenuation of MDA5-dependent β interferon induction." . | FASEB journal : official publication of the Federation of American Societies for Experimental Biology 33 . 1 (2019) : 286-300 .
APA Ye Chengjin , Yu Zhaoli , Xiong Yiwei , Wang Yu , Ruan Yina , Guo Yueping et al. STAU1 binds to IBDV genomic double-stranded RNA and promotes viral replication via attenuation of MDA5-dependent β interferon induction. . | FASEB journal : official publication of the Federation of American Societies for Experimental Biology , 2019 , 33 (1) , 286-300 .
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Adverse drug reaction reporting in institutions across six Chinese provinces: a cross-sectional study. PubMed SCIE
期刊论文 | 2019 , 18 (1) , 59-68 | Expert opinion on drug safety
WoS CC Cited Count: 2
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Abstract :

Although China's adverse drug reaction (ADR) reporting and monitoring has developed rapidly, many challenges remain. This study assessed ADR monitoring and reporting in China and identified monitoring problems.A cross-sectional survey was conducted of ADR reporting institutions in six Chinese provinces in April-December 2014. Questionnaires assessed ADR systems, basic resources, and pharmacovigilance activity.Of 720 questionnaires distributed, the response rate was 81.8%. About 93% (n = 371) of pharmaceutical companies and medical institutions had established ADR monitoring departments/units. Few institutions (26%, n = 104) allocated an ADR budget; 7% (n = 30) had received ADR monitoring funding in the last year (2013). Almost all institutions (99%, n = 555) had computers and 47% (n = 263) had a network database. Many institutions conducted public education about drug safety (49%, n = 283), medicine utilization reviews/quality surveys (28%, n = 158), and medicine consultation services (88%, n = 511). Institutions in eastern, central, and western China differed significantly on implementation of existing regulations and pharmacovigilance activities.The institutions surveyed have established ADR monitoring systems. However, these systems have flaws. Urgent improvements are needed in funding, basic resources, reporting processes, and other pharmacovigilance activities.

Keyword :

Adverse drug reaction reporting hospital cross-sectional study China pharmaceutical manufacturers drugstore pharmacovigilance

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GB/T 7714 Zhang Xuemei , Niu Rui , Feng Bianling et al. Adverse drug reaction reporting in institutions across six Chinese provinces: a cross-sectional study. [J]. | Expert opinion on drug safety , 2019 , 18 (1) : 59-68 .
MLA Zhang Xuemei et al. "Adverse drug reaction reporting in institutions across six Chinese provinces: a cross-sectional study." . | Expert opinion on drug safety 18 . 1 (2019) : 59-68 .
APA Zhang Xuemei , Niu Rui , Feng Bianling , Guo Jiadong , Liu Ying , Liu Xinyu . Adverse drug reaction reporting in institutions across six Chinese provinces: a cross-sectional study. . | Expert opinion on drug safety , 2019 , 18 (1) , 59-68 .
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A new photocatalyst based on Co(CO3)0.5(OH)·0.11H2O/Bi2WO6 nanocomposites for high-efficiency cocatalyst-free O2 evolution EI SCIE
期刊论文 | 2019 , 359 , 924-932 | Chemical Engineering Journal
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The practical application of photocatalytic water splitting is essentially limited by the slow kinetic nature of the water oxidation process. Therefore, it is highly desirable but challenging to explore a low-cost and high-efficiency water oxidation catalyst for the aim of commercialization and industrialization. We herein report the first-time synthesis of a novel and high-efficiency visible-light-driven photocatalyst composed of flower-like Co(CO3)0.5(OH)·0.11H2O (CCO) nanowires and Bi2WO6 (BWO) nanosheets, i.e. CCO/BWO nanocomposite, via a facile hydrothermal method. Without utilizing any additional cocatalyst, the composite of CCO/BWO in 30% weight ratio exhibits extraordinarily high photoactivity and photostability towards O2 evolution, achieving an average O2 generation rate of 953 µmol h−1 g−1 under visible-light irradiation (λ > 420 nm). © 2018 Elsevier B.V.

Keyword :

Bi2WO6 Cocatalyst Hydrothermal methods O2 evolution Photocatalytic water splitting Visible light driven photocatalysts Visible-light irradiation Water oxidation catalysts

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GB/T 7714 He, Bin , Liu, Huanhuan , Lin, Zheng et al. A new photocatalyst based on Co(CO3)0.5(OH)·0.11H2O/Bi2WO6 nanocomposites for high-efficiency cocatalyst-free O2 evolution [J]. | Chemical Engineering Journal , 2019 , 359 : 924-932 .
MLA He, Bin et al. "A new photocatalyst based on Co(CO3)0.5(OH)·0.11H2O/Bi2WO6 nanocomposites for high-efficiency cocatalyst-free O2 evolution" . | Chemical Engineering Journal 359 (2019) : 924-932 .
APA He, Bin , Liu, Huanhuan , Lin, Zheng , Yan, Lei , Ning, Jiqiang , Zhong, Yijun et al. A new photocatalyst based on Co(CO3)0.5(OH)·0.11H2O/Bi2WO6 nanocomposites for high-efficiency cocatalyst-free O2 evolution . | Chemical Engineering Journal , 2019 , 359 , 924-932 .
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Pay-it-forward strategy to enhance uptake of dual gonorrhea and chlamydia testing among men who have sex with men in China: a pragmatic, quasi-experimental study SCIE
期刊论文 | 2019 , 19 (1) , 76-82 | LANCET INFECTIOUS DISEASES
WoS CC Cited Count: 1
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Background Chinese men who have sex with men (MSM) rarely receive gonorrhoea and chlamydia testing. The purpose of this pilot study was to evaluate a pay-it-forward strategy to increase uptake of gonorrhoea and chlamydia testing among MSM. Methods We performed a quasi-experimental pragmatic study to compare a pay-it-forward model with standard of care at two HIV testing sites for MSM in Guangzhou, China: an STD clinic for MSM and a local MSM community based organisation. All men who arrived at the STD clinic or the community-based organisation were invited to participate. In the pay-it-forward programme, men were offered free gonorrhoea and chlamydia testing and given the option of donating money toward testing for future participants. In the standard-of-care group, men were offered gonorrhoea and chlamydia testing at the standard patient price of Y150 (about US$21.50). The pay-it-forward programme was implemented for 3 months, after which both sites switched to standard of care offering dual testing for 3 months. The primary outcome for this study was uptake of dual gonorrhoea and chlamydia testing, which we compared using x(2) test and logistic regression, reported as crude odds ratios (cOR) and adjusted odds ratios (aOR), by adjusting for nationality, marital status, income, and site of testing. Findings The pay-it-forward programme took place from Dec 2, 2017, to Feb 3, 2018, and the standard-of-care control took place from March 11, 2018, to May 1, 2018. 408 men were included in this study. 203 men were offered pay-it forward, and 205 were offered standard of care. Overall, 109 (54%) of 203 men in the pay-it-forward group and 12 (6%) of 205 men in the standard-of-care group received gonorrhoea and chlamydia testing (cOR 18.65, 9 78-35 54; p<0.0001; aOR 19.73, 95% CI 10. 02-38. 85; p<0.0001). Of all 121 men who tested, this was the first gonorrhoea test for 97 (80%) men and the first chlamydia test for 104 (86%) men. Five (4%) of these 121 men were diagnosed with gonorrhoea and 15 (12%) were diagnosed with chlamydia. 97 (89%) of 109 men who received testing in the pay-it forward group donated some money toward testing for future participants. Interpretation Pay-it-forward might be a sustainable model for expanding integrated HIV testing services among MSM in China. Copyright (C) 2018 Elsevier Ltd. All rights reserved.

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GB/T 7714 Li, Katherine T. , Tang, Weiming , Wu, Dan et al. Pay-it-forward strategy to enhance uptake of dual gonorrhea and chlamydia testing among men who have sex with men in China: a pragmatic, quasi-experimental study [J]. | LANCET INFECTIOUS DISEASES , 2019 , 19 (1) : 76-82 .
MLA Li, Katherine T. et al. "Pay-it-forward strategy to enhance uptake of dual gonorrhea and chlamydia testing among men who have sex with men in China: a pragmatic, quasi-experimental study" . | LANCET INFECTIOUS DISEASES 19 . 1 (2019) : 76-82 .
APA Li, Katherine T. , Tang, Weiming , Wu, Dan , Huang, Wenting , Wu, Feng , Lee, Amy et al. Pay-it-forward strategy to enhance uptake of dual gonorrhea and chlamydia testing among men who have sex with men in China: a pragmatic, quasi-experimental study . | LANCET INFECTIOUS DISEASES , 2019 , 19 (1) , 76-82 .
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