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multi-level ADAPTIVE CORRECTIONS IN FINITE DIMENSIONAL APPROXIMATIONS

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Journal of Computational Mathematics 2010年第1期28卷 45-54页

作者： Aihui Zhou LSEC ICMSEC Academy of Mathematics and Systems Science Chinese Academy of Sciences Beijing 100190 China

Based on the Boolean sum technique, we introduce and analyze in this paper a class of multi-level iterative corrections for finite dimensional approximations. This type of multi-level corrections is adaptive and can produce highly accurate approximations. For illustration, we present some old and new finite element correction schemes for an elliptic boundary value problem.

关键词： Adaptive Boolean sum Correction Finite dimensional multi-level

multi-level decollement zones and detachment deformation of Longmenshan thrust belt,Sichuan Basin,southwest China

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Science China Earth Sciences 2008年第S2期51卷 32-43页

作者： TANG LiangJie1,2,3,YANG KeMing4,JIN WenZheng1,2,3,L ZhiZhou4 & YU YiXin1,2,3 1 State Key Laboratory of Petroleum Resource and Prospecting,China University of Petroleum,Beijing 102249,China 2 Key Laboratory for Hydrocarbon Accumulation Mechanism,China University of Petroleum,Ministry of Education,Beijing 102249,China 3 Basin and Reservoir Research Center,China University of Petroleum,Beijing 102249,China 4 Southwest Division Company,SINOPEC,Chengdu 610081,China State Key Laboratory of Petroleum Resource and Prospecting China University of Petroleum Beijing China Key Laboratory for Hydrocarbon Accumulation Mechanism China University of Petroleum Ministry of Education Beijing China Basin and Reservoir Research Center China University of Petroleum Beijing China Southwest Division Company SINOPEC Chengdu China

As is well known that many decollement layers were developed in the Longmenshan thrust belt,Si-chuan Basin,China. Through field investigation,explanation of seismic profiles and analysis of the balanced sections,we can divide the decollement zones into 3 categories: (1) the deep level decolle-ment zones,including the crust-mantle decollement layer,intracrustal decollement layer,and presinian basal decollement layer. The main structural styles of their deformation are the crust-mantle decoup-ling detachment deformation,the basal ductile shear deformation,etc.; (2) the middle level decollement zones,including the Cambrian-Ordovician decollement layer,the Silurian decollement layer,etc.,the main structural styles of their deformation are the isopachous fold,the angular fold,the saddle struc-ture,and the combination styles of them; and (3) the shallow level decollement zones,including the Xujiahe Formation decollement layer of Upper Triassic and the Jurassic decollement layers,the main structural styles of their deformation are the thrust-nappe tectonic,the pop-up,the triangle zone ,the duplex,etc. multi-level decollement zones not only made the Longmenshan thrust belt develop many different deformation styles from deep place to shallow place,but also made some local areas have the superimposition of the tectonic deformation apparently. This study indicates that the multi-level de-collement zones have a very important effect on the shaping and evolution of the Longmenshan thrust belt.

关键词： decollement layer structural styles multi-level decollement zones Longmenshan thrust belt

A flexible nickel phthalocyanine resistive random access memory with multi-level data storage capability

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Journal of Materials Science & Technology 2021年第27期86卷 151-157页

作者： Tariq Aziz Yun Sun Zu-Heng Wu Mustafa Haider Ting-Yu Qu Azim Khan Chao Zhen Qi Liu Hui-Ming Cheng Dong-Ming Sun Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of Sciences72 Wenhua RoadShenyang110016China University of Chinese Academy of Sciences 19A Yuquan RoadBeijing100049China School of Material Science and Engineering University of Science and Technology of China72 Wenhua RoadShenyang110016China Key Laboratory of Microelectronic Devices&Integrated Technology Institute of MicroelectronicsChinese Academy of Sciences3 Bei-Tu-Cheng West RoadBeijing100029China Pak-Austria Fachhochschule:Institute of Applied Sciences and Technology MangKhanpur RoadHaripurKPKPakistan NUS Graduate School Integrative Sciences and Engineering ProgrammeNational University of Singapore119077Singapore Frontier Institute of Chip and System Fudan University2005 Songhu RoadShanghai 200433China Shenzhen Geim Graphene Center Shenzhen International Graduate SchoolTsinghua University1001 Xueyuan RoadShenzhen518055China

Metal phthalocyanine is considered one of the most promising candidates for the design and fabrication of flexible resistive random access memory(RRAM)devices due to its intrinsic flexibility and excellent ***,performance degradation and the lack of multi-level capability,which can directly expand the storage capacity in one memory cell without sacrificing additional layout area,are the primary obstacles to the use of metal phthalocyanine RRAMs in information ***,a flexible RRAM with pristine nickel phthalocyanine(Ni Pc)as the resistive layer is reported for multi-level data *** to its high trap-concentration,the charge transport behavior of the device agrees well with classical space charge limited conduction controlled by traps,leading to an excellent performance,including a high on-off current ratio of 10^(7),a long-term retention of 10^(6)s,a reproducible endurance over6000 cycles,long-term flexibility at a bending strain of 0.6%,a write speed of 50 ns under sequential bias pulses and the capability of multi-level data storage with reliable retention and uniformity.

关键词： Flexible Metal phthalocyanine Resistive random access memory multi-level

Detecting human-object interaction with multi-level pairwise feature network

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Computational Visual Media 2021年第2期7卷 229-239页

作者： Hanchao Liu Tai-Jiang Mu Xiaolei Huan Key Laboratory of Pervasive Computing Ministry of EducationBNRistDepartment of Computer Science and TechnologyTsinghua UniversityBeijing 100084China College of Information Sciences and Technology Pennsylvania State UniversityUniversity ParkPA 16802USA.

Human–object interaction(HOI)detection is crucial for human-centric image understanding which aims to infer human,action,object triplets within an *** studies often exploit visual features and the spatial configuration of a human–object pair in order to learn the action linking the human and object in the *** argue that such a paradigm of pairwise feature extraction and action inference can be applied not only at the whole human and object instance level,but also at the part level at which a body part interacts with an object,and at the semantic level by considering the semantic label of an object along with human appearance and human–object spatial configuration,to infer the *** thus propose a multi-level pairwise feature network(PFNet)for detecting human–object *** network consists of three parallel streams to characterize HOI utilizing pairwise features at the above three levels;the three streams are finally fused to give the action *** experiments show that our proposed PFNet outperforms other state-of-the-art methods on the VCOCO dataset and achieves comparable results to the state-of-the-art on the HICO-DET dataset.

关键词： human–object interaction detection pairwise feature network deep learning multi-level object instance

Research on the multi-level intake water temperature effect of the Yalong River Jinping-I hydropower project

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Science China(Technological Sciences) 2011年第S1期54卷 125-132页

作者： WU ShiYong 1,CAO Wei 1,WANG HongMei 1,SUN ShuangKe 2 &CHEN QiuWen 3 1 Ertan Hydropower Development Company,Ltd.,Chengdu 610051,China 2 China Institute of Water Resources and Hydropower Research,Beijing 100038,China 3 Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing 100085,China Ertan Hydropower Development Company Ltd. Chengdu China China Institute of Water Resources and Hydropower Research Beijing China Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing China

Based on the discussion of the multi-level intake application status of high dam reservoir,this paper takes the Jinping-I hydropower project reservoir in the Yalong River as an example,which is shaped by the highest 305 m high arch dam,and carries out the forecasting research on the reservoir temperature by numerical simulation and physical model *** paper studies the intake effect of withdrawing the surface warm water by the stoplog gates inlets and verifies the reliability of the mathematical model by comparative *** results show that for a high dam hydropower station,taking the appropriate multi-level intake measure can withdraw the surface warm water in the spawning season and provide a favorable environment for the fish *** technical ideas and implementation scheme are adopted in this *** can provide technical reference for the solutions of similar problems in the future and it also has important engineering significance on the research of water temperature in large deep reservoirs.

关键词： water temperature multi-level intake Jinping-I hydropower project

Design of Irregular QC-LDPC Code Based multi-level Coded Modulation Scheme for High Speed Optical Communication Systems

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China Communications 2019年第5期16卷 106-120页

作者： Liqian Wang Dongdong Wang Yongjing Ni Xue Chen Midou Cui Fu Yang Beijing University of Posts and Telecommunications Beijing 100876China The 54th Research Institute of China Electronics Technology Group Corporation Shijiazhuang 050081China Science and Technology on Communication Networks Laboratory Shijiazhuang 050081China College of Information Science and Engineering Yanshan UniversityQinhuangdao 066000China College of Information Science and Engineering Hebei University of Science and TechnologyShijiazhuang 050000China The Key Laboratory for Computer Virtual Technology and System Integration of Hebei Province Yanshan University Qinhuangdao 066000China

In this paper, we focus on the design of irregular QC-LDPC code based multi-level coded modulation(MLCM) scheme by jointly optimizing the component code rate and the degree distribution of the irregular QC-LDPC component code. Firstly, the sub-channel capacities of MLCM systems is analyzed and discussed, based on which the optimal component code rate can be obtained. Secondly, an extrinsic information transfer chart based two-stage searching algorithm is proposed to find the good irregular QC-LDPC code ensembles with optimal component code rates for their corresponding sub-channels. Finally, by constructing the irregular QC-LDPC component codes from the designed ensembles with the aim of possibly enlarging the girth and reducing the number of the shortest cycles, the designed irregular QC-LDPC code based 16QAM and 64QAM MLCM systems can achieve 0.4 dB and 1.2 dB net coding gain, respectively, compared with the recently proposed regular QC-LDPC code based 16QAM and 64QAM MLCM systems.

关键词： quasi-cyclic low-density parity check (QC-LDPC) code irregular, extrinsic information transfer(EXIT) chart generalized mutual information(GMI) multi-level coded modulation(MLCM)

Fabrication of multi-level 3-dimension microstructures by phase inversion process

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Nano-Micro Letters 2010年第2期2卷 95-100页

作者： Y.Song Key Laboratory of Aerospace Materials and Performance (Education Ministry of China) Beihang University

One process based on phase inversion of fillers in microstructures for the fabrication of multi-level three-dimensional(3-D) microstructures is described using SU-8, a kind of epoxy photoresist, as the model constructing materials. This process is depicted by use of the routine photolithography technique to construct the top layer of 3-D microstructures on the bottom layer of 3-D microstructures layer by layer. This process makes it possible to fabricate multi-level 3-D microstructures with connectors at desired locations, and to seal long span microstructures(e.g. very shallow channels with depth less than 50 μm and width more than 300 μm) without blockage. In addition, this process can provide a sealing layer by the solidification of a liquid polymer layer, which can be as strong as the bulk constructing materials for microstructures due to a complete contact and cross-linking between the sealing layer and the patterned layers. The hydrodynamic testing indicates that this kind of sealing and interconnection can endure a static pressure of more than 10 MPa overnight and a hydrodynamic pressure drop of about 5.3 MPa for more than 8 hours by pumping the tetrahydrofuran solution through a 60 μm wide micro-channels.

关键词： Microstructures multi-level Fabrication Photolithography Phase inversion Sealing

Control performance and energy saving of multi-level pressure switching control system based on independent metering control

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High Technology Letters 2020年第2期26卷 224-234页

作者：曹晓明 Yao Jing Sha Tong Wang Pei College of Mechanical Engineering Yanshan UniversityQinhuangdao 066004P.R.China School of Mechanical Engineering Nanjing Institute of TechnologyNanjing 210000P.R.China

Aiming at the problem of large energy consumption in hydraulic control system with large load and variable working conditions,based on the multi-level pressure switching control system(MPSCS),a multi-level pressure switching control system based on independent metering control is proposed combined with the independent metering control *** configuration principle of the system is given,the mathematical model of this system is established,and the control strategy of the system under 4 different working quadrants is put ***,the control performance and energy saving characteristics of the system are *** test results show that the switching of high and low pressure power supply has a certain effect on the response of step position and ramp position under impedance working *** displacement curves show slow climbing or abrupt change of ramp position,and the position accuracy is less than 1 *** multi-level pressure switching control system based on independent metering control can recover and store energy under the transcendence working *** control accuracy is about 1 mm,and the energy recovery rate is about 70%~80%.

关键词： multi-level pressure independent metering control displacement control energy saving hydraulic switching system

Efficient multi-level fault simulation of HW/SW systems for structural faults

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Science China(Information Sciences) 2011年第9期54卷 1784-1796页

作者： BARANOWSKI Rafal DI CARLO Stefano HATAMI Nadereh IMHOF Michael E. KOCHTE Michael A. PRINETTO Paolo WUNDERLICH Hans-Joachim ZOELLIN Christian G. University of Stuttgart Institute of Computer Architecture and Computer Engineering Politecnico di Torino Dipartimento di Automatica e Informatica

In recent technology nodes,reliability is increasingly considered a part of the standard design flow to be taken into account at all levels of embedded systems *** traditional fault simulation techniques based on low-level models at gate-and register transfer-level offer high accuracy,they are too inefficient to properly cope with the complexity of modern embedded ***,they do not allow for early exploration of design alternatives when a detailed model of the whole system is not yet available,which is highly required to increase the efficiency and quality of the design ***-level models that combine the simulation efficiency of high abstraction models with the accuracy of low-level models are therefore essential to efficiently evaluate the impact of physical defects on the *** paper proposes a methodology to efficiently implement concurrent multi-level fault simulation across gate-and transaction-level models in an integrated simulation *** leverages state-of-the-art techniques for efficient fault simulation of structural faults together with transaction-level *** combination of different models allows to accurately evaluate the impact of faults on the entire hardware/software system while keeping the computational effort ***,since only selected portions of the system require low-level models,early exploration of different design alternatives is efficiently *** results obtained from three case studies are presented to demonstrate the high accuracy of the proposed method when compared with a standard gate/RT mixed-level approach and the strong improvement of simulation time which is reduced by four orders of magnitude in average.

关键词： fault simulation multi-level transaction-level modeling