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基于重复数据删除的分层存储优化技术研究进展

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计算机科学 2025年第1期52卷 120-130页

作者：姚子路付印金肖侬国防科技大学计算机学院长沙410073 中山大学国家超级计算广州中心广州510006

随着全球数据量的爆炸式增长以及数据多样性的日益丰富,单一介质层的存储系统逐渐不能满足用户多样化的应用需求。分层存储技术可依据数据的重要性、访问频率、安全性需求等特征将数据分类存放到具有不同访问延迟、存储容量、容错能力... 详细信息

随着全球数据量的爆炸式增长以及数据多样性的日益丰富,单一介质层的存储系统逐渐不能满足用户多样化的应用需求。分层存储技术可依据数据的重要性、访问频率、安全性需求等特征将数据分类存放到具有不同访问延迟、存储容量、容错能力的存储层中,已经在各个领域得到广泛应用。重复数据删除是一种面向大数据的缩减技术,可高效去除存储系统中的重复数据,最大化存储空间利用率。不同于单存储层场景,将重复数据删除技术运用于分层存储中,不仅能减少跨层数据冗余,进一步节省存储空间、降低存储成本,还能更好地提升数据I/O性能和存储设备的耐久性。在简要分析基于重复数据删除的分层存储技术的原理、流程和分类之后,从存储位置选择、重复内容识别和数据迁移操作3个关键步骤入手,深入总结了诸多优化方法的研究进展,并针对基于重复数据删除的分层存储技术潜在的技术挑战进行了深入探讨。最后展望了基于重复数据删除的分层存储技术的未来发展趋势。

关键词：重复数据删除分层存储存储位置选择重复内容识别数据迁移

Integrated adsorption and absorption process for post-combustion CO_(2) capture

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Frontiers of Chemical Science and Engineering 2021年第3期15卷 483-492页

作者： Gongkui xiao Penny xiao Andrew Hoadley Paul Webley Department of Chemical Engineering The University of Western AustraliaPerth WA 6009Australia Department of Chemical Engineering University of MelbourneVictoria 3010Australia Department of Chemical Engineering Monash UniversityVictoria 3800Australia

This study explored the feasibility of integrating an adsorption and solvent scrubbing process for postcombustion CO_(2) capture from a coal-fired power *** integrated process has two stages:the first is a vacuum swing adsorption(VSA)process using activated carbon as the adsorbent,and the second stage is a solvent scrubber/stripper system using monoethanolamine (30 wt-%) as the *** results showed that the adsorption process could enrich CO_(2) in the flue gas from 12 to 50 mol-% with a CO_(2) recovery of >90%,and the concentrated CO_(2) stream fed to the solvent scrubber had a significantly lower volumetric *** increased CO_(2) concentration and reduced feed flow to the absorption section resulted in significant reduction in the diameter of the solvent absorber,bringing the size of the absorber from uneconomically large to readily achievable *** addition,the VSA process could also remove most of the oxygen initially existed in the feed gas,alleviating the downstream corrosion and degradation problems in the absorption *** findings in this work will reduce the technical risks associated with the state-of-the art solvent absorption technology for CO_(2) capture and thus accelerate the deployment of such technologies to reduce carbon emissions.

关键词： vacuum swing adsorption monoethanolamine post-combustion CO_(2)capture integrated process

Experimental study of dual nano-network, high-temperature resistant aerogel material as an integration of thermal management functions

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Journal of Energy Chemistry 2025年第1期 157-170页

作者： Yueyue xiao Tianke Mao Zun Zhao Yuelei Pan Heping Zhang Xudong Cheng State Key Laboratory of Fire Science University of Science and Technology of China

Thermal management system is highly desirable to guarantee the performance and thermal safety of lithium-ion batteries,but it reduces the energy density of battery modules and even is unable to provide highly effective ***,a thermal management function integrated material is presented based on high-temperature resistant aerogel and phase change material and is applied at both charge–discharge process and thermal runaway *** this sandwich structure Paraffin@SiC nanowire/Aerogel sheet （denoted as PA@SAS） system,SiC nanowires endow the middle aerogel sheet （SAS） a dual nano-network *** enhanced mechanical properties of SAS were studied by compressive tests and dynamic mechanical ***,the thermal conductivity of SAS at 600°C is only 0.042 W/（m K）.The surface phase change material layers facilitate temperature uniformity of batteries （surface temperature difference less than 1.82°C） through latent ***,a large-format battery module with four 58 Ah LiNi0.5Co0.2Mn0.3O2LIBs was ***@SAS successfully prevents thermal runaway propagation,yielding a temperature gap of 602°C through the 2 mm-thick cross ***@SAS also exhibits excellent performance in other safety issues such as temperature rise rate,flame heat flux,*** lightweight property and effective insulation performance achieves significant safety enhancement with mass and volume energy density reduction of only 0.79%and 5.4%,*** originality of the present research stems from the micro and macro structure design of the proposed thermal management material and the combination of intrinsic advantages of every *** work provides a reliable design of achieving the integration of thermal management functions into an aerogel composite and improves the thermal safety of lithium-ion batteries.

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高性能YOLOv3-tiny嵌入式硬件加速器的混合优化设计

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半导体技术 2025年第1期50卷 55-63页

作者：谭会生肖鑫凯卿翔湖南工业大学轨道交通学院湖南株洲412000

为解决在嵌入式设备中部署神经网络受算法复杂度、执行速度和硬件资源约束的问题,基于Zynq异构平台,设计了一个高性能的YOLOv3-tiny网络硬件加速器。在算法优化方面,将卷积层和批归一化层融合,使用8 bit量化算法,简化了算法流程;在加速... 详细信息

为解决在嵌入式设备中部署神经网络受算法复杂度、执行速度和硬件资源约束的问题,基于Zynq异构平台,设计了一个高性能的YOLOv3-tiny网络硬件加速器。在算法优化方面,将卷积层和批归一化层融合,使用8 bit量化算法,简化了算法流程;在加速器架构设计方面,设计了可动态配置的层间流水线和高效的数据传输方案,缩短了推理时间,减小了存储资源消耗;在网络前向推理方面,针对卷积计算,基于循环展开策略,设计了8通道并行流水的卷积模块;针对池化计算,采用分步计算策略实现对连续数据流的高效处理;针对上采样计算,提出了基于数据复制的2倍上采样方法。实验结果表明,前向推理时间为232 ms,功耗仅为2.29 W,系统工作频率为200 MHz,达到了23.97 GOPS的实际算力。

关键词： YOLOv3-tiny网络异构平台硬件加速器动态配置架构硬件混合优化数据复制上采样

Experimental Study on Geometry Characteristics of Turbulent Premixed Flames for Natural Gas/Air Mixtures

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Journal of Thermal Science 2025年第1期 268-282页

作者： ZHENG Weilin WANG Qijiao xiao Huahua CHEN xiaoxiao XIE Fan ZENG Wen Liaoning Key Lab of Advanced Test Technology for Aerospace Propulsion System Shenyang Aerospace University State Key Laboratory of Fire Science University of science and Technology of China AVIC Shenyang Aircraft Design and Research Institute

In this study,focusing on the geometry characteristics of spherical expanding flame,the turbulent premixed flames of natural gas/air mixtures were investigated in a fan-stirred turbulent *** effects of initial temperature（T=300-400 K）,initial pressure（P=0.1-0.3 MPa）,turbulence intensity（u'=1.0-2.7 m/s）,oxygen volumetric percentage(φ（O2）=15%-21%) and carbon dioxide volumetric percentage(φ（CO2）=0-20%)were delved *** flame profile under the Cartesian coordinate system was derived from the schlieren images taken by the high-speed ***,from both macroscopic and microscopic perspectives,the influence of experimental conditions on the flame geometry characteristics was explored through flame front extraction,wavelet decomposition and network *** results demonstrate that for significant flame wrinkling,changes in species concentrations and turbulence intensity have more pronounced effects on the flame wrinkling *** wrinkling of the flame front maintains a certain degree of similarity,as evidenced by the locally concentrated distribution of the angles of the maximum fluctuation *** disturbance energy under large-scale（D6-D8） disturbances exhibits relatively high values with a similar trend,exerting a significant impact on the geometry characteristics of the flame *** peaks of correlation degree are scattered either with the decomposition scale or the development of flame radius,indicating no linear correlation between different detail ***,the probability distribution of node degrees in key wrinkled regions exhibits different trends with that of large-scale wrinkling and disturbance energy,especially with changes in initial *** occurs because the number of key wrinkles varies based on the perturbation's strength or the region's ***,an increase in the fluctuation frequency of the flame's local radius may not necessarily lead to an increase in the number of key folded regions.

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Phase constitution of the noble metal thin-film complex solid solution system Ag-Ir-Pd-Pt-Ru in dependence of elemental compositions and annealing temperatures

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Nano Research 2022年第6期15卷 4827-4836页

作者： Bin xiao xiao Wang Alan Savan Alfred Ludwig Materials Discovery and Interfaces Institute for MaterialsRuhr University Bochum44780 BochumGermany Zentrum für Grenzflächendominierte Höchstleistungswerkstoffe(ZGH) Ruhr University Bochum44780 BochumGermany

Multiple-principal element alloys hold great promise for multifunctional material discovery(e.g.,for novel electrocatalysts based on complex solid solutions)in a virtually unlimited compositional ***,the phase constitution of the noble metal system Ag-Ir-Pd-Pt-Ru was investigated over a large compositional range in the quinary composition space and for different annealing temperatures from 600 to 900°C using thin-film materials ***-dependent X-ray diffraction mapping of the asdeposited thin-film materials library indicates different phases being present across the composition space(face-centered cubic(fcc),hexagonal close packed(hcp)and mixed fcc+hcp),which are strongly dependent on the Ru *** general,low Ru contents promote the fcc phase,whereas high Ru contents favor the formation of an hcp solid-solution ***,a temperature-induced phase transformation study was carried out for a selected measurement area of fcc-Ag_(5)Ir_(8)Pd_(56)Pt_(8)Ru_(23).With increasing temperature,the initial fcc phase transforms to an intermediate C14-type Laves phase at 360°C,and then to hcp when the temperature reaches 510°*** formation and disappearance of the hexagonal Laves phase,which covers a wide temperature range,plays a crucial role of bridging the fcc to hcp phase *** obtained composition,phase and temperature data are transformed into phase maps which could be used to guide theoretical studies and lay a basis for tuning the functional properties of these materials.

关键词： noble metal high-entropy alloys phase transformation combinatorial synthesis and high-throughput characterization

Grey information coverage interaction relational decision making and its application

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Journal of Systems Engineering and Electronics 2020年第2期31卷 359-369页

作者： xiao Qinzi SHAN Miyuan GAO Mingyun xiao Xinping School of Business Administration Hunan UniversityChangsha 410082China School of Science Wuhan University of TechnologyWuhan 430070China

This study aims to reflect the information coverage grey number and the interaction between attributes in grey relational decision making. Therefore, a multi-attribute decision method based on the grey information coverage interaction relational degree(GIRD) is proposed. Firstly, this paper defines the information coverage grey number, and establishes the GIRD model by using the Choquet fuzzy integral and grey relational principle. It proves that the proposed model not only is the general and unified form of the point relational degree, interval relational degree, mixed relational degree and grey fuzzy integral relational degree, but also can effectively deal with the interaction between attributes. Further,a decision making example of evaluating the industrial operation quality for 14 cities in Hunan province of China is provided to highlight the implementation, availability, and feasibility of the proposed decision model.

关键词： grey information coverage interaction effect fuzzy integral grey relational degree industrial quality evaluation

Fabrication and Characterizations of Metallic Mg Containing PMMA-Based Partially Degradable Composite Bone Cements

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Acta Metallurgica Sinica(English Letters) 2019年第7期32卷 808-816页

作者： xiao Lin Adrian Chan xiao-xiao Tan Hui-Lin Yang Lei Yang Orthopaedic Institute Soochow University Suzhou 215006 China Department of Orthopaedics The First Affiliated Hospital of Soochow University Suzhou 215006 China Waterloo Institute for Nanotechnology (WIN) University of Waterloo 200 University Ave West Waterloo ON Canada School of Materials Engineering Shanghai University of Science and Engineering Shanghai 201620 China

Inadequate strength at the bone/cement interface is one of the main drawbacks of poly(methylmethacrylate)(PMMA) bone cement in the current orthopedic surgeries. In the present work, a partially degradable PMMA/Mg composite bone cement (PMC) was developed for enhancing the bone/cement interfacial strength, which is proposed to be accomplished by increasing the osteo-conductivity of PMMA and enhancing the mechanical interlocking between bone tissue and the porous PMMA surface formed by the degradation of Mg on the surface of the cement. PMCs were prepared with various concentrations of Mg particles with different sizes and alloy compositions. The effects of Mg particle size, composition and content on the injectability, mechanical and degradation properties, and biocompatibility of PMCs were evaluated. The results show that these parameters affected the properties of the PMCs simultaneously. The good injectability and compressive strengths of PMMA were preserved, while the compatibility to osteoblasts was enhanced when adding Mg particles in a proper manner. The PMCs degraded at the surface with time and formed porous surface structures in the physiological environment, while maintaining the original compressive strengths. This preliminary study shows that the PMC is promising for minimally invasive orthopedic surgery;however, it still requires to be optimized and evaluated in the future.

关键词： Biomaterials Composite Magnesium Poly(methylmethacrylate) Bone cement Kyphoplasty

Topological circuit of a versatile non-Hermitian quantum system

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Science China(Physics,Mechanics & Astronomy) 2022年第1期65卷 53-60页

作者： David-Andres Galeano xiao-xiao Zhang Jorge Mahecha Instituto de F´ısica Facultad de Ciencias Exactas y NaturalesUniversidad de AntioquiaMedell´ın 050010Colombia Unidad Transacciones T&D Energ´ıa Gerencia Comercial T&D Energ´ıaV.P.T&D Energ´ıaEPMMedell´ın 050015Colombia Department of Physics and Astronomy&Stewart Blusson Quantum Matter Institute University of British ColumbiaVancouver V6T 1Z4Canada RIKEN Center for Emergent Matter Science(CEMS) Saitama 351-0198Japan Department of Chemistry University of British ColumbiaVancouver V6T 1Z4Canada

We propose a resistors,inductors and capacitors(RLC)electrical circuit to theoretically analyze and fully simulate a new type of non-Hermitian Su-Schrieffer-Heeger(SSH)model with complex *** formulate its construction and investigate its properties by taking advantage of the circuit’s *** physical properties can be identified in this system from the normal modes of oscillation of the RLC circuit,including the highly tunable bulk-edge correspondence between topological winding numbers and edge states and the non-Hermitian skin phenomenon originating from a novel complex energy plane *** present study is able to show the wide and appealing topological physics inherent to electric circuits,which is readily generalizable to a plenty of both Hermitian and non-Hermitian nontrivial systems.

关键词： topolectric circuit SSH model non-Hermitian topology skin effect