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Enabling Highly Efficient k-Means Computations on the SW26010 Many-Core Processor of Sunway TaihuLight

Journal of Computer Science & technology 2019年第1期34卷 77-93页

作者： Min Li Chao Yang Qiao Sun Wen-Jing Ma Wen-Long Cao Yu-Long Ao Institute of Software Chinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China School of Mathematical Sciences Peking UniversityBeijing 100871China Center for Data Science Peking UniversityBeijing 100871China peng Cheng laboratory Shenzhen 518052China

With the advent of the big data era,the amounts of sampling data and the dimensions of data features are rapidly *** is highly desired to enable fast and efficient clustering of unlabeled samples based on feature similarities. As a fundamental primitive for data clustering,the k-means operation is receiving increasingly more attentions *** achieve high performance k-means computations on modern multi-core/many-core systems,we propose a matrix-based fused framework that can achieve high performance by conducting computations on a distance matrix and at the same time can improve the memory reuse through the fusion of the distance-matrix computation and the nearest centroids *** implement and optimize the parallel k-means algorithm on the SW26010 many-core processor,which is the major horsepower of Sunway *** particular,we design a task mapping strategy for load-balanced task distribution,a data sharing scheme to reduce the memory footprint and a register blocking strategy to increase the data *** techniques such as instruction reordering and double buffering are further applied to improve the sustained *** on block-size tuning and performance modeling are also *** show by experiments on both randomly generated and real-world datasets that our parallel implementation of k-means on SW26010 can sustain a double-precision performance of over 348.1 Gflops,which is 46.9% of the peak performance and 84%of the theoretical performance upper bound on a single core group,and can achieve a nearly ideal scalability to the whole SW26010 processor of four core *** comparisons with the previous state-of-the-art on both CPU and GPU are also provided to show the superiority of our optimized k-means kernel.

关键词： parallel k-means performance optimization SW26010 processor Sunway TaihuLight

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A state-of-the-art review of asphalt pavement surface texture and its measurement techniques

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Journal of Road Engineering 2022年第2期2卷 156-180页

作者： Siyu Chen Xiyin Liu Haoyuan Luo Jiangmiao Yu Fuda Chen Yang Zhang Tao Ma Xiaoming Huang School of Transportation Southeast UniversityNanjing 211189China School of Civil Engineering and Transportation South China University of TechnologyGuangzhou 510640China

To understand the research status of asphalt pavement texture,the related achievements and progress of pavement surface texture were systematically sorted out from three aspects:the characterization of pavement surface texture,the texture measurement and evaluation,and the relationship between texture and the skid *** on the statistical geometric characteristics,the spectral characteristics,the fractal characteristics and the multifractal characteristics,the characteristics of pavement texture were *** test methods of pavement texture were divided into two categories:direct measurement methods and indirect measurement *** advantages and disadvantages of each measurement method were *** effects of macro-texture and micro-texture on asphalt pavement were discussed,*** relationship between texture and skid resistance was *** review shows that multifractal theory should be further studied from the aspect of road ***-precision non-contact integrated detection technology should be further studied to meet the needs of complex testing *** method of finite element numerical simulation has potential for the analysis of pavement skid *** addition,methods such as big data analysis,neural network,and deep learning should be studied to achieve the intelligent perception and management of the whole state of skid resistance prediction.

关键词： Asphalt pavement Surface texture measurement Skid resistance Friction

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Chapter 5 Dark Matter and New Physics Beyond the Standard Model with LHAASO

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Chinese Physics C 2022年第3期46卷 126-138页

作者： Xiao-Jun Bi Andrea Addazi Konstantin Belotsky Vitaly Beylin Marco Cirelli Arman Esmaili Nicolao Fornengo Qing-Yu Gan Michael Kachekriess Maxim Khlopov Vladimir Korchagin Alexander Korochkin Vladimir Kuksa Antonino Marciano Andrei Neronov Paolo Panci Roman Pasechnick Alexander Sakharov Filippo Sala Giuseppe Di Sciascio Dimiri Semikoz Pasquale Dario Serpico Nikolay Volchanskiy Peng-Fei Yin key laboratory of Particle Astrophysics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China Center for Theoretical Physics College of Physics Science and TechnologySichuan UniversityChengdu 610065China Laboratori Nazionali di Frascati INFN Frasacati(Rome)ItalyEU National Research Nuclear University MEPHI(Moscow state Engineering Physics Institute) 31 Kashirskoe chausseeMoscow 115409Russia Institute of Physics Southern Federal University Stachki 194Rostov on Don 344090Russia LPTHE CNRS and Sorbonne Universit′e4 Place JussieuF-75252ParisFrance Departamento de Fisica Pontificia Universidade Catolica do Rio de JaneiroRio de Janeiro 22452-970Brazil Dipartimento di Fisica Universita di TorinoVia P.Giuria 110125 TorinoItaly Istituto Nazionale di Fisica Nucleare Sezione di TorinoVia P.Giuria 110125TorinoItaly Institutt for fysikk NTNU7491 TrondheimNorway Universite de Paris CNRSAstroparticule et CosmologieF-75013 ParisFrance Department of Physics and Center for Field Theory and Particle Physics Fudan UniversityShanghai 200433China Astronomy Department University of GeneveCh.d’Ecogia 161290VersolxSwitzerland Dipartimento di Fisica Universita di Pisa and INFNSezione di Pisa Largo Pontecorvo 356127 PisaItaly Department of Astronomy and Theoretical Physics Lund University22100 LundSwedenEU Experimental Physics Department CERNGeneva 23 CH 1211Switzerland Department of Physics New York UniversityNew York NY United states of America INFN sezione Roma Tor Vergata I-00133 RomeItaly LAPTh Univ.Grenoble AlpesUSMBCNRSF-74000 AnnecyFrance Bogoliubov laboratory of Theoretical Pjysics JINRDubnaRussia

In order to reveal the nature of dark matter,it is crucial to detect its non-gravitational interactions with the standard model *** traditional dark matter searches focused on the so-called weakly interacting massive ***,this paradigm is strongly constrained by the null results of current experiments with high *** there is a renewed interest of searches for heavy dark matter particles above TeV *** Large High Altitude Air Shower Observatory(LHAASO)with large effective area and strong background rejection power is very suitable to investigate the gamma-ray signals induced by dark matter annihilation or decay above TeV *** this document,we review the theoretical motivations and background of heavy dark *** review the prospects of searching for the gamma-ray signals resulted from dark matter in the dwarf spheroidal satellites and Galactic halo for LHAASO,and present the projected *** also review the prospects of searching for the axion-like particles,which are a kind of well motivated light pseudo-scalars,through the LHAASO measurement of the very high energy gamma-ray spectra of astrophysical sources.

关键词： dark matter gamma-ray axion-like particle

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Energy Transfer among Chlorophylls in Trimeric Light-harvesting Complex Ⅱ of Bryopsis corticulans

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Acta Biochimica et Biophysica Sinica 2006年第5期38卷 310-317页

作者： Su-Juan ZHANG~(1,2*)Shui-Cai WANG~2 Jun-Fang HE~2 Hui CHEN~3 1 Institute of Photonics and Photo-technology,Northwest University,Xi'an 710069,China 2 state key laboratory of Transient Optics and Photonics,Xi 'an Institute of Optics and precision Mechanics,Chinese Academy of Sciences,Xi'an 710068.China 3 Laboratoty of Photosynthesis Basic Research,Institute of Botany,Chinese Academy of Sciences,Beijing 100093,China InstituteofPhotonicsandPhoto-technology NorthwestUniversityXi'an710069China statekeylaboratoryofTransientOpticsandPhotonics Xi'anInstituteofOpticsandPrecisionMechanicsChineseAcademyofSciencesXi'an710068China

A study on energy transfer among chlorophylls（Chls）in the trimeric unit of the major light-harvesting complex Ⅱ（LHC Ⅱ）from Bryopsis corriculan,was carried out using time-correlated singlephoton *** the chlorophyll Q region of LHC Ⅱ,six molecules characterized as Chlb628,Chlb646,Chlb652654,657,Chla664666,Chla674677.680and Chla682683were discriminated according to their absorption spectrumand fluorescence emission ***,excited by pulsed light of 628 nm,fluorescence kinetics spectrain the chlorophyll Q region were *** accordance with the principles of fluorescence kinetics,thesekinetics data were analyzed with a multi-exponential *** constants on energy transfer were *** overwhelming percentage of energy transfer among chlorophylls undergoes a process longer than 97picoseconds（ps）,which shows that,before transferring energy to another Chl,the excited Chl might convertenergy to vibrations of a lower state with different multiplicity（intersystem crossing）.Energy transfer at thelevel of approximately 10 ps was also obtained,which was interpreted as the excited Chls may go throughinternal conversion before transferring energy to another *** with a higher standard deviation,timeconstants at the femtosecond level can not be entirely excluded,which can be attributed to the ultrafastprocess of direct energy *** to the arrangement and direction of the dipole moment of Chls inLHC Ⅱ,the probability of these processes is *** fluorescence lifetimes of Chlb652654,657,Chla664666,Chla674677.680and Chla682683were determined to be 1.44ns,1.43 ns,636 ps and 713 ps,*** of energy dissipation in the pathway of fluorescence emission were no more than 40% in thetrimeric unit of LHC Ⅱ.These results are important for a better understanding of the relationship between thestructure and function of LHC Ⅱ.

关键词： energy transfer LHC Ⅱ transient spectrum fluorescence kinetics

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Output Power Attenuation Rate Prediction for Photovoltaic Panels Considering Dust Deposition in Hazy Weather

Output Power Attenuation Rate Prediction for Photovoltaic Pa...

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第36届中国控制会议

作者： Ma Liangyu Li Jintuo Ma Rui Li Jing Liu Weiliang School of Control and Computer Engineering North China Electric Power University Economic Research Institute State Grid Jibei Electric Power Company Limited

ISBN: (纸本)9781538629185

Photovoltaic（PV） power prediction is a key technology to improve the control and scheduling performance of PV power plant and ensure safe and stable grid operation with high-ratio PV power *** recent years,the frequent occurrence of hazy weather has seriously influence on the output power of PV panels,aiming at this problem,output power attenuation characteristic test is implemented for PV panels with dust deposition,by taking PM accumulated concentration and installation angle as input variables,a output power attenuation rate prediction model for PV panels is proposed based on BP neural *** result indicates that the presented BP neural network prediction model has the virtues of high precision and good generalization ability.

关键词： Photovoltaic power generation hazy weather dust deposition power attenuation rate neural network modeling

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Evaluation of urban underground space resources using digitalization technologies

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Underground Space 2016年第2期1卷 124-136页

作者： Hehua Zhu Xianbin Huang Xiaojun Li Lianyang Zhang Xuezeng Liu Department of Geotechnical Engineering Tongji UniversityShanghai 200092China Department of Civil Engineering and Engineering Mechanics University of ArizonaTucsonAZ 85721USA Shanghai Tongyan Civil Engineering technology Co.Ltd Shanghai 200092China

Exploitation and utilization of urban underground space resources is gaining increasing attention in cities’sustainable *** to the attributes of fragility and irreversibility,urban underground space resources can be extremely vulnerable to damage and it is often difficult in restoring their original state once ***,scientific and reasonable evaluation of urban underground space resources is of vital importance in urban planning and *** paper first describes the content and methods for the evaluation of urban underground space resources,and introduces the digitalization technologies to handle the problems of strong subjectivity,low efficiency and rough precision encountered when using traditional evaluation ***,the related concepts and main technologies for digitalization were demonstrated and an intelligent GIS-based engineering geology system was *** on the drilling information in Changzhou City,stratum standardization and 3D modeling of strata,underground structures and pipelines were conducted in the built intelligent ***,with the help of spatial overlay analysis in the GIS-based platform and a combination of other digitalization technologies,the urban underground space resources of Changzhou City were *** of geological suitability were produced,which provide scientific guidance and reference for the exploitation and planning of urban underground space resources in Changzhou *** addition,site selection for key projects was conducted based on the evaluation results using this platform.

关键词： Urban underground space resources Digitalization technologies GIS Suitability evaluation Site selection

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On-chip beam rotators,adiabatic mode converters,and waveplates through low-loss waveguides with variable cross-sections

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Light(Science & Applications) 2022年第8期11卷 1876-1890页

作者： Bangshan Sun Fyodor Morozko Patrick S.Salter Simon Moser Zhikai Pong Raj B.Patel Ian A.Walmsley Mohan Wang Adir Hazan Nicolas Barré Alexander Jesacher Julian Fells Chao He Aviad Katiyi Zhen-Nan Tian Alina Karabchevsky Martin J.Booth Department of Engineering Science University of OxfordOxfordOX13PJUK School of Electrical and Computer Engineering Ben-Gurion University of the NegevP.O.B.653Beer-Sheva8410501Israel Institute of Biomedical Physics Medical University of InnsbruckMüllerstraße 446020InnsbruckAustria Ultrafast Quantum Optics group Department of PhysicsImperial College LondonLondonUK Department of Physics University of OxfordOxfordUK Erlangen Graduate School in Advanced Optical Technologies(SAOT) Friedrich-Alexander-University Erlangen-NürnbergPaul-Gordan-Straße 691052ErlangenGermany state key laboratory of Integrated Optoelectronics College of Electronic Science and EngineeringJilin UniversityChangchun130012China

Photonics integrated circuitry would benefit considerably from the ability to arbitrarily control waveguide cross-sections with high precision and low loss,in order to provide more degrees of freedom in manipulating propagating ***,we report a new method for femtosecond laser writing of optical-fiber-compatible glass waveguides,namely spherical phase-induced multicore waveguide(SPIM-WG),which addresses this challenging task with three-dimensional on-chip light *** in the heating regime with high scanning speed,precise deformation of cross-sections is still achievable along the waveguide,with shapes and sizes finely controllable of high resolution in both horizontal and vertical transversal *** observed that these waveguides have high refractive index contrast of 0.017,low propagation loss of 0.14 dB/cm,and very low coupling loss of 0.19 dB coupled from a single-mode ***-WG devices were easily fabricated that were able to perform on-chip beam rotation through varying angles,or manipulate the polarization state of propagating light for target *** also demonstrated SPIM-WG mode converters that provide arbitrary adiabatic mode conversion with high efficiency between symmetric and asymmetric nonuniform modes;examples include circular,elliptical modes,and asymmetric modes from ppKTP(periodically poled potassium titanyl phosphate)waveguides which are generally applied in frequency conversion and quantum light *** inside optical glass,these waveguides and devices have the capability to operate across ultra-broad bands from visible to infrared *** compatibility with optical fiber also paves the way toward packaged photonic integrated circuitry,which usually needs input and output fiber connections.

关键词： waveguide waveguides polarization

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Impact of apolipoprotein A1 on tumor immune microenvironment, clinical prognosis and genomic landscape in hepatocellular carcinoma

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precision Clinical Medicine 2023年第3期6卷 158-171页

作者： Ying Wang Shipeng Chen Xiao Xiao Fan Yang Jinhan Wange Hui Zong Yuzhen Gao Chenjun Huang Xuewen Xu Meng Fang Xiaoyan Zhang Chunfang Gao Clinical laboratory Medicine Center Yueyang Hospital of Integrated Traditional Chinese and Western MedicineShanghai University of Traditional Chinese MedicineShanghai200437China Department of laboratory Medicine Shanghai Eastern Hepatobiliary Surgery HospitalShanghai 200438China Research Center for Translational Medicine Shanghai East HospitalSchool of Life Sciences and TechnologyTongji UniversityShanghai 200092China Department of Medical Microbiology and Infection Prevention Tumor Virology and Cancer ImmunotherapyUniversity Medical Center GroningenUniversity of GroningenGroningen 9712 CPThe Netherlands state key laboratory for Diagnosis and Treatment of Infectious Diseases The First Affliated HospitalSchool of MedicineZhejiang UniversityHangzhou 310058China Department of Hepatobiliary and Pancreatic Surgery Shanghai East HospitalTongji University School of MedicineShanghai 200120China Institutes for Systems Genetics Frontiers Science Center for Disease-Related Molecular NetworkWest China HospitalSichuan UniversityChengdu 610041China Department of Clinical laboratory Sir Run Run Shaw HospitalZhejiang University School of MedicineHangzhou 310058China

Background:Current knowledge on apolipoprotein A1(APOA1)in hepatocellular carcinoma(HCC)is fragmented and even ***-dimensional analyses are required to comprehensively elucidate its value and underlying ***:We collected 49 RNA-seq datasets,40 cell line types data and 70 scRNA pan-cancer datasets public available,including 17 HCC datasets(1754 tumor samples),and enrolled 73 pairs of HCC tissue and 516 blood samples independently from our ***1 impacting on the HCC tumor microenvironment(TME)was analyzed using intensive data *** sequencing,flow cy-tometry,quantitative PCR,western blot,immunohistochemistry and clinical chemistry assays were conducted for wet experimental ***:The APOA1 ontology fingerprint indicated that it played various crucial biological roles in HCC,primarily involved in choles-terol *** findings at histology,serology,and clinical follow-up revealed that high APOA1 was a good prognosis indicator of *** in the APOA1 promoter region was found in clinical samples which is in accordance with the reduction of APOA1 in *** cell cycle,DNA replication,mismatch repair pathways,and tumor cell proliferation were less observed in the HCC APOAihigh *** favorable immunoregulatory abilities of APOA1 showed interesting findings:a positive correlation between APOA1 and anti-tumor immune cells(NK,CD8+T cells)and a negative association with immune cells exerting immunosuppressive effects,including M2 ***:This is an integrative multidimensional exploration of APOA1 using bioinformatics and *** the prognostic value and anti-tumor effects based on APOA1 panoramic exploration in the HCC TME demonstrate a new potential clinicai target for HCC assessment and intervention in the future.

关键词： APOA1 HCC prognosis tumor microenvironment immune cells NK cell

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Support vector regression constraint to remove fault shadows-A case study of an oil field in the pearl river estuary basin,South China Sea

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Earthquake Research Advances 2021年第S1期1卷 8-12页

作者： Xiaojiang Yang Xiaotao Wen Yahui Wang Zhenghe Yan Kai Hou College of geophysics Chengdu University of TechnologyChengdu 610059China Shenzhen Branch of CNOOC Ltd. Shenzhen 518067China

The main reservoirs in different fields in the YP oil region of the eastern Pearl River Estuary Basin are all fault-locked reservoirs.A large amount of seismic data in this area has fault-influenced distortion imaging zones,which poses a challenge to the tectonic evaluation of the *** solutions to fault shadows generally use reacquisition of multi-directional seismic data or targeted processing for fault imaging,which involves the acquisition of high cost and long processing *** this paper,we propose to quantitatively depict the shadow zone range of faults using 3D stratigraphic dip attributes,and then combine it with the lateral distribution of marine stratigraphy features in the YP oil region,we introduced a support vector regression algorithm to calculate a high-precision nonlinear tectonic trend surface in the *** the constraint of this trend surface,we completed the prediction of distortion area structure of the fault shadow *** theoretical model test calculations and the production application of an oil field in the YP oil region show that the method has a great potential for application.

关键词： SVR Trend surface Fault shadow

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A Method Based on Knowledge Distillation for Fish School Stress state Recognition in Intensive Aquaculture

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Computer Modeling in Engineering & Sciences 2022年第6期131卷 1315-1335页

作者： Siyuan Mei Yingyi Chen Hanxiang Qin Huihui Yu Daoliang Li Boyang Sun Ling Yang Yeqi Liu College of Information and Electrical Engineering China Agricultural UniversityBeijing100083China National Innovation Center for Digital Fishery China Agricultural UniversityBeijing100083China School of Information Science and technology Beijing Forestry UniversityBeijing100083China

Fish behavior analysis for recognizing stress is very important for fish welfare and production management in *** advances have been made in fish behavior analysis based on deep ***,most existing methods with top performance rely on considerable memory and computational resources,which is impractical in the real-world *** order to overcome the limitations of these methods,a new method based on knowledge distillation is proposed to identify the stress states of fish *** knowledge distillation architecture transfers additional inter-class information via a mixed relative loss function,and it forces a lightweight network(GhostNet)to mimic the soft probabilities output of a well-trained fish stress state recognition network(ResNeXt101).The fish school stress state recognition model’s accuracy is improved from 94.17%to 98.12%benefiting from the *** proposed model has about 5.18 M parameters and requires 0.15 G FLOPs(floating-point operations)to process an image of size 224×***,fish behavior images are collected in a land-based factory,and a dataset is constructed and extended through flip,rotation,and color jitter augmentation *** proposed method is also compared with other state-of-the-art *** experimental results show that the proposed model is more suitable for deployment on resource-constrained devices or real-time applications,and it is conducive for real-time monitoring of fish behavior.

关键词： Fish behavior deep learning knowledge distillation aquaculture

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