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Self-adaptive scale pedestrian detection algorithm based on deep residual network

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International Journal of Intelligent Computing and Cybernetics 2019年第3期12卷 318-332页

作者： shuang-shuang liu Department of Computer Science Nanchang Business CollegeJiangxi Agricultural UniversityNanchangChina

Purpose–The conventional pedestrian detection algorithms lack in scale *** purpose of this paper is to propose a novel algorithm of self-adaptive scale pedestrian detection,based on deep residual network(DRN),to address such ***/methodology/approach–First,the“Edge boxes”algorithm is introduced to extract region of interestsfrompedestrian ***,the extracted boundingboxesare incorporatedto differentDRNs,one is a large-scale DRN and the other one is the small-scale *** height of the bounding boxes is used to classify the results of pedestrians and to regress the bounding boxes to the entity of the *** last,a weighted self-adaptive scale function,which combines the large-scale results and small-scale results,is designed for the final pedestrian ***–Tovalidatetheeffectivenessandfeasibilityoftheproposedalgorithm,somecomparisonexperiments have been done on the common pedestrian detection data sets:Caltech,INRIA,ETH and *** resultsshowthatt*** small-scale pedestrians,the proposed algorithm has improved the accuracy and robustness of ***/value–By applying different models to deal with different scales of pedestrians,the proposed algorithm with the weighted calculation function has improved the accuracy and robustness for different scales of pedestrians.

关键词： Deep residual network Edge boxes Pedestrian detection Self-adaptive scale Weight function

Synthesis of Bioactive Natural Polymethoxyflavones and Their Vinyl Ether Derivatives

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Chemical Research in Chinese Universities 2012年第4期28卷 631-636页

作者： CAI shuang-lian liu shuang liu Li WANG Qiu-an College of Chemistry and Chemical Engineering Hunan UniversityChangsha 410082P.R.China

Bioactive natural polymethoxyflavones 1―6 and their vinyl ether derivatives 7―15 were synthesized by bromination,aromatic nucleophilic substitution,methylation,benzyl protection,Friedel-Crafts acetylation,aldol condensation,cyclization,DDQ dehydrogenation,regioselective demethylation,debenzylation and O-prenylation or O-farnesylation with resorcinol and appropriate substituted benzaldehydes as starting *** them,compounds 7―15 are new *** products 2―4 were firstly total *** syntheses of compounds 1,5 and 6 were efficiently improved by the new synthetic *** structures of all synthetic compounds were confirmed by NMR,IR spectra and MS.

关键词： Flavonoid Polymethoxyflavone Prenylation Farnesylation

Exponential Time Differencing Method for a Reaction-Diffusion System with Free Boundary

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Communications on Applied Mathematics and Computation 2024年第1期6卷 354-371页

作者： shuang liu Xinfeng liu Department of Mathematics University of CaliforniaSan Diego9500 Gilman DriveLa JollaCalifornia92093-0112USA Department of Mathematics University of South CarolinaColumbiaSouth Carolina29208USA

For reaction-diffusion equations in irregular domains with moving boundaries,the numerical stability constraints from the reaction and diffusion terms often require very restricted time step sizes,while complex geometries may lead to difficulties in the accuracy when discretizing the high-order derivatives on grid points near the *** is very challenging to design numerical methods that can efficiently and accurately handle both *** an implicit scheme may be able to remove the stability constraints on the time step,however,it usually requires solving a large global system of nonlinear equations for each time step,and the computational cost could be *** factor(IF)or exponential time differencing(ETD)methods are one of the popular methods for temporal partial differential equations(PDEs)among many other *** our paper,we couple ETD methods with an embedded boundary method to solve a system of reaction-diffusion equations with complex *** particular,we rewrite all ETD schemes into a linear combination of specificФ-functions and apply one state-of-the-art algorithm to compute the matrix-vector multiplications,which offers significant computational advantages with adaptive Krylov *** addition,we extend this method by incorporating the level set method to solve the free boundary *** accuracy,stability,and efficiency of the developed method are demonstrated by numerical examples.

关键词： Reaction diffusion equations Free boundary Integrating factor method Level set method

Fault separation and detection algorithm based on Mason Young Tracy decomposition and Gaussian mixture models

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International Journal of Intelligent Computing and Cybernetics 2020年第1期13卷 81-101页

作者： Xiaoling Li shuang shuang liu College of Gongqing Nanchang UniversityGongqingchengChina Nanchang Business College Jiangxi Agricultural UniversityNanchangChina

Purpose-For the large-scale power grid monitoring system equipment,its working environment is increasingly complex and the probability of fault or failure of the monitoring system is gradually *** paper proposes a fault classification algorithm based on Gaussian mixture model(GMM),which can complete the automatic classification of fault and the elimination of fault sources in the monitoring ***/methodology/approach-The algorithm first defines the GMM and obtains the detection value of the fault classification through a method based on the causal Mason Young Tracy(MYT)decomposition under each normal distribution in the ***,the weight value of GMM is used to calculate weighted classification value of fault detection and separation,and by comparing the actual control limits with the classification result of GMM,the fault classification results are ***-The experiment on the defined non-thermostatic continuous stirred-tank reactor model shows that the algorithm proposed in this paper is superior to the traditional algorithm based on the causal MYT decomposition in fault detection and fault ***/value-The proposed algorithm fundamentally solves the problem of fault detection and fault separation in large-scale systems and provides support for troubleshooting and identifying fault sources.

关键词： Power grid monitoring system Fault detection Fault separation Gaussian mixture model Causal MYT decomposition

Nitrogen cycling of atmosphere-plant-soft system in the typical Calamagrostis angustifolia wetland in the Sanjiang Plain,Northeast China

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Journal of Environmental Sciences 2007年第8期19卷 986-995页

作者： SUN Zhi-gao liu Jing-shuang Northeast Institute of Geography and Agricultural Ecology Chinese Academy of Sciences Changchun 130012 China. Graduate University of Chinese Academy of Sciences Beijing 100039 China Yantai Institute of Coastal Zone Research for Sustainable Development Chinese Academy of Sciences Yantai 264003 China

The nitrogen （N） distribution and cycling of atmosphere-plant-soil system in the typical meadow Calamagrostis angustifolia wetland （TMCW） and marsh meadow Calamagrostis angustifolia wetland （MMCW） in the Sanjiang plain were studied by a compartment model. The results showed that the N wet deposition amount was 0.757 gN/（m^2·a）, and total inorganic N （TIN） was the main body （0.640 gN/（m^2·a））. The ammonia volatilization amounts of TMCW and MMCW soils in growing season were 0.635 and 0.687 gN/m^2, and the denitrification gaseous lost amounts were 0.617 and 0.405 gN/m^2, respectively. In plant subsystem, the N was mainly stored in root and litter. Soil organic N was the main N storage of the two plant-soil systems and the proportions of it were 93.98% and 92.16%, respectively. The calculation results of N turnovers among compartments of TMCW and MMCW showed that the uptake amounts of root were 23.02 and 28.18 gN/（m^2·a） and the values of aboveground were 11.31 and 6.08 gN/（m^2·a）, the re-translocation amounts from aboveground to root were 5.96 and 2.70 gN/（m^2·a）, the translocation amounts from aboveground living body to litter were 5.35 and 3.38 gN/（m^2·a）, the translocation amounts from litter to soil were larger than 1.55 and 3.01 gN/（m^2·a）, the translocation amounts from root to soil were 14.90 and 13.17 gN/（m^2·a）, and the soil （0-15 cm） N net mineralization amounts were 1.94 and 0.55 gN/（m^2·a）, respectively. The study of N balance indicated that the two plant-soil systems might be situated in the status of lacking N, and the status might induce the degradation of C. angustifolia wetland.

关键词： compartment model nitrogen cycling Calamagrostis angustifolia wetland ecosystem Sanjiang Plain

Sliding mode synchronization between uncertain Watts-Strogatz small-world spatiotemporal networks

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Applied Mathematics and Mechanics(English Edition) 2020年第12期41卷 1833-1846页

作者： shuang liu Runze ZHANG Qingyun WANG XiaoyanHE Shanghai Engineering Research Center of Physical Vapor Deposition Superhard Coating and Equipment Shanghai Institute of TechnologyShanghai 201418China Department of Dynamics and Control Beihang UniversityBeijing 100191China Department of Statistics and Mathematics Inner Mongolia University of Finance and EconomicsHuhhot 010070China

Based on the topological characteristics of small-world networks,a nonlinear sliding mode controller is designed to minimize the effects of internal parameter *** qualify the effects of uncertain parameters in the response networks,some effective recognition rates are designed so as to achieve a steady value in the extremely fast simulation time ***,the Fisher-Kolmogorov and Burgers spatiotemporal chaotic systems are selected as the network nodes for constructing a drive and a response network,*** simulation results confirm that the developed sliding mode could realize the effective synchronization problem between the spatiotemporal networks,and the outer synchronization is still achieved timely even when the connection probability of the small-world networks changes.

关键词： synchronization sliding mode control small-world network parameter identification

Regulating tumor suppressor genes:post-translational modifications

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Signal Transduction and Targeted Therapy 2020年第1期5卷 1688-1712页

作者： Ling Chen shuang liu Yongguang Tao Key Laboratory of Carcinogenesis and Cancer Invasion Ministry of EducationDepartment of PathologyXiangya HospitalSchool of Basic MedicineCentral South University410078 ChangshaHunanChina NHC Key Laboratory of Carcinogenesis(Central South University) Cancer Research InstituteCentral South University410078 ChangshaHunanChina Department of Oncology Institute of Medical SciencesNational Clinical Research Center for Geriatric DisordersXiangya HospitalCentral South University410008 ChangshaHunanChina Hunan Key Laboratory of Early Diagnosis and Precision Therapy Department of Thoracic SurgerySecond Xiangya HospitalCentral South University410011 ChangshaChina

Tumor suppressor genes cooperate with each other in *** important tumor suppressor proteins,retinoblastoma(Rb),p53,phosphatase,and tensin homolog deleted on chromosome ten(PTEN)are functionally associated and they regulated by posttranslational modification(PTMs)as *** include phosphorylation,SUMOylation,acetylation,and other novel modifications becoming growing *** most of PTMs are reversible,normal cells use them as a switch to control the state of cells being the resting or proliferating,and PTMs also involve in cell survival and cell cycle,which may lead to abnormal proliferation and *** a lot of studies focus on the importance of each kind of PTM,further discoveries shows that tumor suppressor genes(TSGs)form a complex“network”by the interaction of ***,there are several promising strategies for TSGs for they change more frequently than carcinogenic genes in *** here review the necessity,characteristics,and mechanisms of each kind of post-translational modification on Rb,p53,PTEN,and its influence on the precise and selective *** also discuss the current antitumoral therapies of Rb,p53 and PTEN as predictive,prognostic,and therapeutic target in cancer.

关键词： suppressor translational precise

Creep damage evolution process of asphalt binder based on viscoelastic characteristics

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Journal of Traffic and Transportation Engineering(English Edition) 2024年第3期11卷 497-506页

作者： Xiaofei Qi shuang Tian Liyan Shan shuang liu Yajie Wang School of Transportation Science and Engineering Harbin Institute of TechnologyHarbin 150090China College of Water Conservancy&Architectural Engineering Shihezi UniversityShihezi 832003China

The creep damage evolution of asphalt binder plays a significant role in investigating the formation mechanism of *** rutting is the common distress at high temperatures for asphalt ***,the reliability of existing creep damage parameters is under questioned,and these parameters cannot accurately illustrate the change of intrinsic microstructure for asphalt *** this paper,a new test protocol was given access to study the evolution of viscoelastic parameters during creep *** was completed by inserting the frequency sweep during creep *** frequency sweep curve clusters were fitted by the generalized Kelvin-Voigt model for obtaining the change law of model *** on the change law and sensitivity analysis of model parameters,(E_(2)+E_(3))/2 was proposed as the creep damage *** to the curve of(E_(2)+E_(3))/2 versus loading time,two stages during the creep test could be identified:an approximate constant value in phase I and a linear decrease in phase *** differences about creep property of binders could be determined by this new proposed *** results not only ensure better understanding of the creep damage mechanism of binders,but also lay the theoretical foundation on predicting the anti-rutting performance of binders.

关键词： Asphalt binder Multi-stage creep test Damage variable Evolution law

Active and passive compliant force control of ultrasonic surface rolling process on a curved surface

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Chinese Journal of Aeronautics 2022年第7期35卷 289-299页

作者： Kaiming ZHANG Ji WANG Yixin liu shuang liu Xiancheng ZHANG School of Mechanical and Power Engineering East China University of Science and TechnologyShanghai 200237China

Ultrasonic surface rolling process(USRP)is one of the effective mechanical surface enhancement *** the USRP,unstable static force will easily do harm to the surface *** order to achieve a higher surface quality on the part with a curved surface,an active and passive compliant USRP system has been *** compliant USRP tool can produce the natural obedience deformation along the part *** control based on the fuzzy Proportional-integral-derivative(PID)method is then designed to maintain the static force during the *** have been performed on a real aero-engine blade with curved *** is proved that the deigned active and passive compliant USRP system can significantly reduce the force variation from 42.2 N to 4.2 N,and achieve a uniform surface quality after processing.

关键词： Active and passive compliant Curved surface Force control Surface integrity Ultrasonic surface rolling process