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Energy Efficient Run-Time Incremental Mapping for 3-D Networks-on-chip

Journal of computer Science & Technology 2013年第1期28卷 54-71页

作者： Xiao-Hang Wang Peng Liu mei Yang Maurizio Palesi Ying-Tao Jiang Michael c Huang Intelligent chips and Systems Research centre Guangzhou Institute of Advanced Technology Chinese Academy of Sciences Guangzhou 511458 China Department of Information Science and Electronic Engineering Zhejiang University Hangzhou 310027 China Department of Electrical and computer Engineering University of Nevada Las Vegas Nevada U.S.A. Faculty of Engineering Kore University Catania Italy Department of Electrical and computer Engineering University of Rochester Rochester New York U.S.A.

3-D Networks-on-chip （Noc） emerge as a potent solution to address both the interconnection and design complexity problems facing future Multiprocessor System-on-chips （MPSocs）. Effective run-time mapping on such 3-D Noc-based MPSocs can be quite challenging, as the arrival order and task graphs of the target applications are typically not known a priori, which can be further complicated by stringent energy requirements for Noc systems. This paper thus presents an energy-aware run-time incremental mapping algorithm （ERIM） for 3-D Noc which can minimize the energy consumption due to the data communications among processor cores, while reducing the fragmentation effect on the incoming applications to be mapped, and simultaneously satisfying the thermal constraints imposed on each incoming application. Specifically, incoming applications are mapped to cuboid tile regions for lower energy consumption of communication and the minimal routing. Fragment tiles due to system fragmentation can be gleaned for better resource utilization. Extensive experiments have been conducted to evaluate the performance of the proposed algorithm ERIM, and the results are compared against the optimal mapping algorithm （branch-and-bound） and two heuristic algorithms （TB and TL）. The experiments show that ERIM outperforms TB and TL methods with significant energy saving （more than 10%）, much reduced average response time, and improved system utilization.

关键词： energy efficiency Networks-on-chip multiprocessor System-on-chips run-time incrementa] mapping

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Sub-nanometer structured silicon-carbon composite nanolayers armoring on graphite for fast-charging and high-energy-density lithium-ion batteries

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Rare Metals 2023年第11期42卷 3692-3704页

作者： Zhen-Wei Li mei-Sheng Han Jie Yu Songshan Lake Materials Laboratory Dongguan523808China Guangdong Provincial Key Laboratory of Semiconductor Optoelectronic Materials and Intelligent Photonic Systems Shenzhen Engineering Lab for Supercapacitor MaterialsSchool of Material Science and EngineeringHarbin Institute of TechnologyShenzhenShenzhen 518055China Department of Mechanical and Energy Engineering Southern University of Science and TechnologyShenzhen518055China

Silicon/carbon composites are promising alternatives to current graphite anodes in commercial lithiumion batteries(LIBs)because of their high capacity and excellent ***,the unsatisfactory fastcharging capability and cycle stability of Si/c composites caused by slow charge transport capability and huge volume change under industrial electrode conditions severely hamper their ***,a novel Si/c anode was fabricated by homogeneously depositing amorphous c-Si nanolayers on graphite(c-Si@graphite).c-Si nanolayers with uniformly dispersed sub-nanometer Si particles in 3D carbon skeleton significantly boost electron and Li-ion transport and efficiently relieve Si's agglomeration and volume *** a result,the tailored c-Si@graphite electrodes show an excellent rate capacity(760.3 mAh·g^(-1)at 5.0c)and long cycle life of over 1000 cycles at 1.0c and800 cycles at 2.0c under industrial electrode *** addition,the assembled full cells(c-Si@graphite,anode;Li[Ni_(0.8)co_(0.1)Mn_(0.1)]O_(2),cathode)present superior fastcharging capability(240.4 Wh·kg^(-1),charging for16.2 min,3.0c)and long cycle life(80.7%capacity retention after 500 cycles at 1.0c),demonstrating the massive potential of c-Si@graphite for practical application.

关键词： Si/c anode Sub-nanometer Si Fast-charging capability Lithium-ion batteries(LIBs)

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Energy-Efficient Optimal Guaranteed cost Intermittent-Switch control of a Direct Expansion Air conditioning System

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IEEE/cAA Journal of Automatica Sinica 2021年第11期8卷 1852-1866页

作者： Jun mei Zhenyu Lu Junhao Hu Yuling Fan School of Mathematics and Statistics South-Central University for NationalitiesWuhan 430074China School of Electronic and Information Engineering Nanjing University of Information Science and TechnologyNanjing 210044China college of Informatics Huazhong Agricultural UniversityWuhan 430072China

To improve the energy efficiency of a direct expansion air conditioning(DX A/c) system while guaranteeing occupancy comfort, a hierarchical controller for a DX A/c system with uncertain parameters is proposed. The control strategy consists of an open loop optimization controller and a closed-loop guaranteed cost periodically intermittent-switch controller(GcPISc). The error dynamics system of the closed-loop control is modelled based on the GcPISc principle. The difference,compared to the previous DX A/c system control methods, is that the controller designed in this paper performs control at discrete times. For the ease of designing the controller, a series of matrix inequalities are derived to be the sufficient conditions of the lower-layer closed-loop GcPISc controller. In this way, the DX A/c system output is derived to follow the optimal references obtained through the upper-layer open loop controller in exponential time, and the energy efficiency of the system is improved. Moreover, a static optimization problem is addressed for obtaining an optimal GcPISc law to ensure a minimum upper bound on the DX A/c system performance considering energy efficiency and output tracking error. The advantages of the designed hierarchical controller for a DX A/c system with uncertain parameters are demonstrated through some simulation results.

关键词： Energy efficiency hierarchical control open loop optimal control optimal guaranteed cost periodically intermittent-switch control

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Impact of ethanol on the flotation efficiency of imidazolium ionic liquids as collectors:Insights from dynamic surface tension and solvation analysis

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International Journal of Minerals,Metallurgy and Materials 2024年第12期31卷 2645-2656页

作者： Qian cheng Zerui Lei Guangjun mei Jianhua chen Key Laboratory of Green Utilization of critical Non-metallic Mineral Resources Ministry of EducationWuhan University of TechnologyWuhan 430070China MOE Key Laboratory of New Processing Technology for Non-ferrous Meta1s and Materials Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured MaterialsGuangxi UniversityNanning 530004China

To conduct extensive research on the application of ionic liquids as collectors in mineral flotation,ethanol(EtOH)was used as a solvent to dissolve hydrophobic ionic liquids(ILs)to simplify the reagent *** phenomena were observed in which EtOH exerted different effects on the flotation efficiency of two ILs with similar *** EtOH was used to dissolve 1-dodecyl-3-methylimidazolium chloride(c12[mim]cl)and as a collector for pure quartz flotation tests at a concentration of 1×10^(−5)mol·L^(−1),quartz recovery increased from 23.77%to 77.91%compared with ILs dissolved in ***,quartz recovery of 1-dodecyl-3-methylim-idazolium hexafluorophosphate(c12[mim]PF6)decreased from 60.45%to 24.52%under the same *** conditional experi-ments under 1×10^(−5)mol·L^(−1)ILs for EtOH concentration and under 2vol%EtOH for ILs concentration confirmed this *** being affected by EtOH,the mixed ore flotation tests of quartz and hematite showed a decrease in the hematite concentrate grade and re-covery for the c12[mim]cl collector,whereas the hematite concentrate grade and recovery for the c12[mim]PF6 collector *** the basis of these differences and observations of flotation foam,two-phase bubble observation tests were carried *** EtOH promoted the foam height of two ILs during *** accelerated static froth defoaming after aeration stopped,and the foam of c12[mim]PF6 de-foaming especially *** the discussion of flotation tests and foam observation,an attempt was made to explain the reasons and mechanisms behind the diverse phenomena using the dynamic surface tension effect and solvation effect results from *** solva-tion effect was verified through Fourier transform infrared(FT-IR),X-ray photoelectron spectroscopy(XPS),and Zeta potential ***-though EtOH affects the adsorption of ILs on the ore surface during flotation negatively,it holds an positive value of inhibiting foam mer-ging during flotation a

关键词： ionic liquid ethanol flotation foam solvation dynamic surface tension

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Response to temperature stress of reactive oxygen species scavenging enzymes in the cross-tolerance of barley seed germination

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2010年第12期11卷 965-972页

作者： Yu-qin mei Song-quan SONG Institute of Botany Chinese Academy of Sciences Beijing 100093 China

A number of studies have shown the existence of cross-tolerance in plants, but the physiological mechanism is poorly understood. In this study, we used the germination of barley seeds as a system to investigate the cross-tolerance of low-temperature pretreatment to high-temperature stress and the possible involvement of reactive oxygen species （ROS） scavenging enzymes in the cross-tolerance. After pretreatment at 0 ℃ for different periods of time, barley seeds were germinated at 35 ℃, and the content of malondialdehyde （MDA） and the activities of ROS scavenging enzymes were measured by a spectrophotometer analysis. The results showed that barley seed germinated very poorly at 35 ℃, and this inhibitive effect could be overcome by pretreatment at 0 ℃. The MDA content varied, depending on the temperature at which seeds germinated, while barley seeds pretreated at 0 ℃ did not change the MDA content. compared with seeds germinated directly at 35 ℃, the seeds pretreated first at 0 ℃ and then germinated at 35 ℃ had markedly increased activities of superoxide dismutase （SOD）, ascorbate peroxidase （APX）, catalase （cAT）, and glutathione reductase （GR）. The SOD and APX activities of seeds germinated at 35 ℃ after 0 ℃-pretreatment were even substantially higher than those at 25 ℃, and GR activity was similar to that at 25 ℃, at which the highest germination performance of barley seeds was achieved. These results indicate that low-temperature pretreatment can markedly increase the tolerance of barley seed to high temperature during germination, this being related to the increase in ROS scavenging enzyme activity. This may provide a new method for increasing seed germination under stress environments, and may be an excellent model system for the study of cross-tolerance.

关键词： Barley seed cross-tolerance Germination/growth Reactive oxygen species (ROS) scavenging enzyme,Pretreatment at low temperature Temperature stress

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Research of the traffic characteristics for the real time online traffic classification

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The Journal of china Universities of Posts and Telecommunications 2011年第3期18卷 92-98页

作者： SUN mei-feng cHEN Jing-tao college of Information Engineering Yangzhou University Yangzhou 225009 China

Aiming at the hysteretic characteristics of classification problem existed in current intemet traffic identification field, this paper investigates the traffic characteristic suitable for the on-line traffic classification, such as quality of service （QoS）. By the theoretical analysis and the experimental observation, two characteristics （the AcK-Len ab and AcK-Len ha） were obtained. They are the data volume which first be sent by the communication parties continuously. For these two characteristics only depend on data＇s total length of the first few packets on the flow, network traffic can be classified in the early time when the flow arrived. The experiment based on decision tree c4.5 algorithm, with above 97% accuracy. The result indicated that the characteristics proposed can commendably reflect behavior patterns of the network application, although they are simple.

关键词： on-line traffic classification traffic characteristics AcK-Len ab AcK-Len ba

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SYNTHESIS AND cHARAcTERIZATION OF A NOVEL DOPANT (c3-ABSA) FOR SYNTHESIZING TUBULAR POLYANILINE

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chinese Journal of Polymer Science 2001年第1期19卷 65-70页

作者： Hong-jin Qiu mei-xiang Wan center for Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Beijing 100080 China Center for Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Beijing 100080 China

4-(3-(4-((4-Nitrophenyl)azo)phenyloxy)propyl)aminobenzene sulfonic acid (c3-ABSA) was synthesized by the reaction of 3-bromide-1-(4-((4-nitrophenyl)azo)phenyloxy)propane (B3) with sodium p-aminobenzene sulfonic acid (ABSA) and acidification with hydrochloric acid. The c3-ABSA was characterized by FTIR, H-1-NMR and second ion mass spectrum (SIMS). The molecular formula of dehydrated c3-ABSA was estimated to be ca. c21H20O6N4S by SIMS. Its decomposition temperature was measured by TGA to be ca. 232 degreesc. It was found that tubular polyaniline (PANI) with a conductivity of 1.1 S/cm at room temperature was successfully synthesized by in-situ doping polymerization in the presence of c3-ABSA as a dopant.

关键词： polyaniline microtubules sulfonic acid dopant conductivity

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Maximum two-dimensional (u×v,4,1,3)-OOcs

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Applied Mathematics(A Journal of chinese Universities) 2013年第3期28卷 279-289页

作者： HUANG Yue-mei cHANG Yan-xun Institute of Mathematics Beijing Jiaotong University Mathematics Science college Inner Mongolia Normal University

Let Ф（u ×v, k, Aa, Ac） be the largest possible number of codewords among all two- dimensional （u ×v, k, λa, λc） optical orthogonal codes. A 2-D （u× v, k, λa, λ）-OOc with Ф（u× v, k, λa, λc） codewords is said to be maximum. In this paper, the number of codewords of a maximum 2-D （u × v, 4, 1, 3）-OOc has been determined.

关键词： maximum two-dimensional optical orthogonal code orbit.

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Model Simulation and Eigen-Analysis for Polarimetric Scattering from Tree canopy in SAR Imagery

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Journal of Systems Engineering and Electronics 2000年第2期11卷 48-54页

作者： Jin, Yaqiu Zhan, Nanxiong chang, mei Fudan Univ Shanghai China

In this paper, a theoretical model of multi-level, non-spherical scatterers is developed for fully polarimetric scattering from tree canopy in SAR imaging at c band. The amplitude functions of non-spherical particles with randomly spatial orientation are derived by the generalized Rayleigh-Gans (GRG) approximation. The non-diagonal extinction matrix and the Mueller matrix solution are constructed. Numerical solutions of polarimetric scattering of four Stokes parameters from random, non-spherical scatterers are obtained. To physically identify polarimetric scattering of the Mueller matrix solution, the coherency matrix and its eigen-analysis are discussed. Functional dependence of the coherency matrix and entropy upon various parameters are obtained. As an application, the analysis of AirSAR images at P, L, c bands is discussed.

关键词： Approximation theory Eigenvalues and eigenfunctions Light scattering Matrix algebra Random processes Synthetic aperture radar Trees (mathematics)

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Admissible Solutions of Systems of complex Partial Difference Equations on c^n

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Acta Mathematicae Applicatae Sinica 2015年第2期31卷 297-306页

作者： Ling-yun GAO Ze-mei ZHENG Department of Mathematics Jinan University Guangzhou

In a recent papers,some authors applied Nevanlinna theory to prove some results on complex difference equations reminiscent of the classical Malmquist theorem in complex differential equations. We will mainly investigate Malmquist theorem of a type of systems of complex partial difference equations on cn,improvements and extensions of such results are presented in this paper.

关键词： Malmquist type meromorphic solution value distribution partial difference equations

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