检索结果-南通市图书馆

Sparse Reconstructive Evidential Clustering for Multi-View Data

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

IEEE/CAA Journal of Automatica Sinica 2024年第2期11卷 459-473页

作者： Chaoyu gong Yang You School of Computing National University of SingaporeSingapore

Although many multi-view clustering(MVC) algorithms with acceptable performances have been presented, to the best of our knowledge, nearly all of them need to be fed with the correct number of clusters. In addition, these existing algorithms create only the hard and fuzzy partitions for multi-view objects,which are often located in highly-overlapping areas of multi-view feature space. The adoption of hard and fuzzy partition ignores the ambiguity and uncertainty in the assignment of objects, likely leading to performance degradation. To address these issues, we propose a novel sparse reconstructive multi-view evidential clustering algorithm(SRMVEC). Based on a sparse reconstructive procedure, SRMVEC learns a shared affinity matrix across views, and maps multi-view objects to a 2-dimensional humanreadable chart by calculating 2 newly defined mathematical metrics for each object. From this chart, users can detect the number of clusters and select several objects existing in the dataset as cluster centers. Then, SRMVEC derives a credal partition under the framework of evidence theory, improving the fault tolerance of clustering. Ablation studies show the benefits of adopting the sparse reconstructive procedure and evidence theory. Besides,SRMVEC delivers effectiveness on benchmark datasets by outperforming some state-of-the-art methods.

关键词： Evidence theory multi-view clustering(MVC) optimization sparse reconstruction

A study of a supersonic capsule/rigid disk-gap-band parachute system using large-eddy simulation

在线全文

学校读者我要写书评

暂无评论

Applied Mathematics and Mechanics(English Edition) 2021年第4期42卷 485-500页

作者： Sheng gong Chuijie WU School of Aeronautics and Astronautics Dalian University of TechnologyDalian 116024Liaoning ProvinceChina

The aerodynamic performances and flow features of the capsule/rigid disk-gap-band(DGB)parachute system from the Mach number 1.8 to 2.2 are *** use the adaptive mesh refinement(AMR),the hybrid tuned center-difference and weighted essentially non-oscillatory(TCD-WENO)scheme,and the large-eddy simulation(LES)with the stretched-vortex subgrid *** simulations reproduce complex interaction of the flow structures,including turbulent wakes and bow shocks,as well as bow shocks and expansion *** results show that the calculated aerodynamic drag coefficient agrees well with the previou *** the aerodynamic drag coefficient and the aerodynamic drag oscillation of the parachute system decrease with the increase of the initial Mach number of the *** is found that the position and angle of the bow shock ahead of the canopy change as the Mach number increases,which makes the flow inside the canopy and the turbulent wake behind the canopy more complex and unstable.

关键词： compressible flow adaptive mesh refinement(AMR) large-eddy simulation(LES) supersonic flow rigid disk-gap-band(DGB)parachute

Mechanics of molecular beacons for mRNA detecting

在线全文

学校读者我要写书评

暂无评论

Acta Mechanica Sinica 2021年第2期37卷 187-193页

作者： Yulong gong Xinghua Shi Laboratory of Theoretical and Computational Nanoscience CAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyChinese Academy of Sciences.Beijing 100190China University of Chinese Academy of Sciences Beijing 100049China

Decoding genetic information is crucial for gene therapy and cancer diagnosis,which has attracted growing interest in the field of clinical medicine and life *** this study,we conducted a comprehensive exploration to obtain the detection mechanism of molecular beacons from a mechanics point of *** potential energy function of molecular beacon/target system is established firstly,based on which the profile of molecular beacons is solved by genetic algorithm *** length of stem and the total energy are further calculated when the target is hybridized with loop and *** results show that the hybridization between target and stem is energetically favorable compared with that between target and loop,indicating a new detection *** analyses may cast light on understanding the mechanism of molecular beacons detection,and further help to design novel molecular beacons with high resolution and quantification.

关键词： Molecular beacon Detection mechanism Finite deformation model Energy release rate

Research on the Trusted Energy-Saving Transmission of Data Center Network

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

China Communications 2016年第12期13卷 139-149页

作者： Yubo Wang Bei gong Mowei gong College of Computer Science Beijing University of Technology

According to the high operating costs and a large number of energy waste in the current data center network architectures, we propose a kind of trusted flow preemption scheduling combining the energy-saving routing mechanism based on typical data center network architecture. The mechanism can make the network flow in its exclusive network link bandwidth and transmission path, which can improve the link utilization and the use of the network energy efficiency. Meanwhile, we apply trusted computing to guarantee the high security, high performance and high fault-tolerant routing forwarding service, which helps improving the average completion time of network flow.

关键词： data center network architecture energy-saving routing mechanism trusted computing network energy consumption flow average completion time

B-site high-entropy tailoring K2NiF4 oxide as an effective cathode for proton-conducting solid oxide fuel cells

在线全文

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2024年第19期186卷 158-163页

作者： Junyi gong Jie Hou School of Resource Environment and Safety Engineering University of South ChinaHengyang 421001China

*** easy protonic conduction in proton-conducting electrolytes enables solid oxide fuel cells(SOFCs)to achieve excellent power outputs at low temperatures(≤600°C,LTs),thereby promoting SOFC commercialization[1,2].However,the poor oxygen reduction reaction(ORR)on the cathode side becomes one main factor limiting the proton-conducting SOFC(H-SOFC)performance[3].Therefore,developing highly active cathode materials is crucial for H-SOFC ***,high-entropy oxides(HEOs)have attracted significant attention as they offer extensive possibilities for tuning the material functionality[4,5].HEOs contain equimolar proportions of five or more different elements,and the configura-tional entropy values should exceed 1.5 R(where R is the molar gas constant)[6,7].Due to their unique chemical composition,highly disordered structure,and random distribution of multiple components,HEOs exhibit excellent physicochemical properties such as high ionic conductivity,fine stability,and outstanding dielectric constants[8,9].Then HEO materials hold potential applications in SOFCs and related electrocatalytic fields.

关键词： conducting entropy oxide

System and prospects of China＇s intercity rail transit technology

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Frontiers of Mechanical Engineering 2018年第2期13卷 323-328页

作者： Ming gong CRRC Corporation Limited Beijing 100060 China

City clusters and metropolitan areas in China are flourishing in the midst of the deepening urbanization in the country, thereby resulting in the emergence of intercity rail transit. Intereity railways connect mainline and urban railways for an integrated regional transportation system that underpins and leads the development of city clusters and metropolitan areas. This study explores the development mode and service characteristics of intercity rail transit, as well as proposes overviews on this system and prospects of its future technology in China.

关键词： intercity rail transit city cluster technical demand technology system

Laser-Induced Distortions and Disturbance Propagation of Delocalized Electronic States in Monatomic Carbon Chains

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics Letters 2012年第6期29卷 219-222页

作者： YANG gong-Xian gong Xiu-Fang School of Materials Science and Engineering Xi’an University of TechnologyXi’an 710048 Dongfang Turbine Co. LtdDeyang 618000

Tight-binding electron-ion dynamics of carbon chains pumped by intense laser pulses are performed to study the interactions between monatomic carbon chains and ***-induced distortions of carbon chains,which are enhanced by a long wavelength laser,are *** carbon chains with a strong laser beam focused on one terminal are simulated to study the disturbance of electronic *** the superposition of delocalized π band states,the disturbance propagates from the illuminated area to the non-illuminated area in a velocity ofabout 106 m/s at 0 K,and this velocity is weakened at room temperature due to the localization effect of thermal fluctuation.

关键词： pumped chains atomic

Probability-based analytical model for predicting the post-earthquake residual deformation of SDOF systems

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Earthquake Engineering and Engineering Vibration 2022年第2期21卷 341-358页

作者： Zhang Qin gong Susu gong Jinxin Zhang Guanhua Xi Guangheng College of Civil and Transportation Engineering Hohai UniversityNanjing 210098China Highway Maintenance Technology Research and Development Center of Liaoning Provincial Communication Planning&Design Insitute Co.Ltd. Shenyang 110111China Department of Civil Engineering Dalian University of TechnologyDalian 116014China

A probability-based analytical model for predicting the seismic residual deformation of bilinear single-degreeof-freedom(SDOF)systems with a kinematic/Takeda hysteretic model is proposed based on a statistical analysis of the nonlinear time history response,and the proposed model explicitly incorporates the influence of record-to-record *** addition,the influence of primary parameters such as the natural vibration period,relative yield force coefficient,stiffness ratio and peak ground acceleration(PGA)on the seismic residual/maximum deformation ratio(dR/dm)are *** results show that significant dispersion of the dR/dm ratio is observed for SDOF systems under different seismic ground motion records,and the dispersion degree is influenced by the model parameters and record-to-record *** statistical distribution of the dR/dm results of SDOF systems can be described by a lognormal ***,a case study for seismic residual deformation and reparability assessment of the bridge structure designed with a single pier is carried out to illustrate the detailed analytical procedure of the probability-based analytical model proposed in this study.

关键词： residual deformation probability model repairability assessment single-degree-of-freedom system nonlinear seismic response record-to-record variability

Chiral aldehyde catalysis: a highly promising concept in asymmetric catalysis

在线全文

学校读者我要写书评

暂无评论

Science China Chemistry 2019年第1期62卷 3-4页

作者： Liu-Zhu gong Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry University of Science and Technology of China

Asymmetric organocatalysis has been a robust tool for manufacturing optically active molecules,in addition to asymmetric metal and bioeatalysis .The development of new concepts and catalysts to enable the creation of efficient synthetic methods has been a longstanding activity in this *** the last decades,a diverse spectrum of chiral organocatalysts,including ketones,amine,Bronsted acids and bases,phase-transfer catalysts,and nucleophilic catalysts,have been developed,culminating in a large number of transformations enabling the efficient construction of optically active natural and unnatural compounds.

关键词： Asymmetric organocatalysis active molecules new concepts