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An efficient and coordinated mapping algorithm in virtualized SDN networks

Frontiers of Information Technology & Electronic Engineering 2016年第7期17卷 701-716页

作者： Shui-qing GONG Jing CHEN qiao-yan kang Qing-wei MENG Qing-chao ZHU Si-yi ZHAO College of Information and Navigation Air Force Engineering University

Software-defined networking(SDN) enables the network virtualization through SDN hypervisors to share the underlying physical SDN network among multiple logically isolated virtual SDN networks(v SDNs),each with its own *** v SDN embedding,which refers to mapping a number of v SDNs to the same substrate SDN network,is a key problem in the SDN virtualization ***,due to the distinctions of the SDN,such as the logically centralized controller and different virtualization technologies,most of the existing embedding algorithms cannot be applied directly to SDN *** this paper,we consider controller placement and virtual network embedding as a joint vS DN embedding problem,and formulate it into an integer linear programming with objectives of minimizing the embedding cost and the controller-to-switch delay for each v ***,we propose a novel online vS DN embedding algorithm called CO-v SDNE,which consists of a node mapping stage and a link mapping *** the node mapping stage,CO-vS DNE maps the controller and the virtual nodes to the substrate nodes on the basis of the controller-to-switch delay and takes into account the subsequent link mapping at the same *** the link mapping stage,CO-v SDNE adopts the k-shortest path algorithm to map the virtual *** evaluation results with simulation and Mininet emulation show that the proposed CO-v SDNE not only significantly increases the long-term revenue to the cost ratio and acceptance ratio while guaranteeing low average and maximum controller-to-switch delay,but also achieves good v SDN performance in terms of end-to-end delay and throughput.

关键词： Software-defined networking(SDN) Network virtualization Controller placement Virtual network embedding Coordination

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Influence of Trace Alloying Elements on Corrosive Resistance of Cast Stainless Steel

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Journal of Iron and Steel Research International 2005年第5期12卷 52-57页

作者： DUAN Han-qiao yan Xiang WEI Bo-kang LIN Han-tong Huazhong University of Science and Technology Wuhan 430074 China

The influences of trace alloying elements niobium, vanadium and zirconium on the corrosive resistance of 18 8 type cast stainless steel have been studied in detail by orthogonal design experiments. The results show that zirconium is mainly in the form of compound inclusions, which is unfavorable to promote the corrosive resistance of the cast stainless steel. It can alleviate the disadvantageous influence of carbon addition on corrosive resistance when some elements such as vanadium and niobium exist in the steel, and niobium has a remarkable influence on the intergranular corrosive resistance but unobvious on the pitting corrosion, and vanadium has a slightly favorable influence on the corrosive resistance of the steel.

关键词： orthogonal design stainless steel trace alloying element corrosive resistance

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Multifunctional tubular carbon nanofibers/polyurethane electromagnetic wave absorber with room-temperature self-healing and recyclable performance

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Nano Research 2023年第1期16卷 33-44页

作者： Shuai kang Shiya qiao Yutong Cao Zuming Hu Na Li Junrong Yu yan Wang State Key Laboratory for Modification of Chemical Fibers and Polymer Materials Donghua UniversityShanghai 201620China College of Materials Science and Engineering Donghua UniversityShanghai 201620China Shanghai Collaborative Innovation Center for High Performance Fiber Composites Donghua UniversityShanghai 201620China Sinochem International Corporation Shanghai 200126China

Incorporating self-healing and recyclable capabilities into microwave absorbing materials is expected to facilitate the life extension,cost reduction,and performance stability,thereby meeting the practical *** this research,a recycling and room-temperature self-healing electromagnetic wave(EMW)absorber is designed,in which linear polyurethane cross-linked by aromatic disulfide bonds is used as healable matrix,and tubular carbon nanofibers(TCNFs)are employed to attenuate *** resultant composites with a TCNFs content of 7 wt.%harvest a minimum reflection loss(RLmin)of−39.0 dB and an effective absorption bandwidth(EAB)of 2.9 GHz at a matching thickness of 4.0 *** by the reversible dynamic bonds including hydrogen bonds and aromatic disulfide bonds,the high healing efficiency of 88.7%at 25°C and 93.2%at 60°C is ***,even after three repairing cycles at room temperature,a healable efficiency of 86.4%is acquired,and RLmin can still reach−39.1 dB at the same thickness,together with an EAB of 3.0 ***,the results of solvent recycling experiment manifest that the recycled specimen achieves the almost similar mechanical and microwave dissipation properties as original *** attractive characteristics make the designed self-healing and recyclable composites promising for next-generation EMW consumption devices.

关键词： tubular carbon nanofibers microwave absorption room-temperature self-healing recyclability

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影响高分子结晶的因素

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辽宁化工 2016年第9期45卷 1158-1160页

作者：张博于克殷丽萍贾楚翘康艳红沈阳师范大学化学化工学院辽宁沈阳110034 东北师范大学化学学院吉林长春130024

高分子结晶是高分子物理中重要的一部分,本文主要针对影响高分子结晶的因素进行了相关总结,发现除了温度、压力等原因外,还有很多因素也在影响着高分子结晶。例如:成核剂、聚合物的兼容性、氢键作用等因素。除此之外,简单对高分子结晶... 详细信息

高分子结晶是高分子物理中重要的一部分,本文主要针对影响高分子结晶的因素进行了相关总结,发现除了温度、压力等原因外,还有很多因素也在影响着高分子结晶。例如:成核剂、聚合物的兼容性、氢键作用等因素。除此之外,简单对高分子结晶的发展进行了阐述。

关键词：高分子结晶影响因素结晶速度

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Structural engineering of Sb-based electrode materials to enhance advanced sodium-ion batteries

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Rare Metals 2024年第10期43卷 4777-4806页

作者： Zheng yang qiao-Ling kang Rui-Wang Li-Jing yan Xian-He Meng Ting-Li Ma College of Materials and Chemistry Jiliang UniversityHangzhou 310018China

Antimony(Sb)is recognized as a potential electrode material for sodium-ion batteries(SIBs)due to its huge reserves,affordability,and high theoretical capacity(660 mAh·g^(-1)).However,Sb-based materials experience significant volume expansion during cycling,leading to comminution of the active substance and limiting their practical use in ***,the volume expansion issue of Sb-based materials during charging/discharging must be solved to create high-performance *** paper presents a detailed review of structural engineering of Sb-based electrode materials,focusing on the performance effects of different kinds of structures on advanced performance ***,the future development and the challenges of Sb-based materials are *** paper can provide specific perspectives on the structure construction and optimization of Sb-based anode materials so as to promote the rapid development and practical applications of SIBs.

关键词： Sb-based electrode Sodium-ion batteries Structural engineering

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Regulating FUS Liquid-Liquid Phase Separation via Specific Metal Recognition

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Chinese Journal of Polymer Science 2022年第9期40卷 1043-1049页

作者： Fen Li Yiyang Lin yan qiao Beijing National Laboratory for Molecular Sciences(BNLMS) Laboratory of Polymer Physics and ChemistryCAS Research/Education Center for Excellence in Molecular SciencesInstitute of ChemistryChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China State Key Laboratory of Chemical Resource Engineering Beijing Laboratory of Biomedical MaterialsBeijing University of Chemical TechnologyBeijing 100029China

Liquid-liquid phase separation(LLPS)or biomolecular condensation that leads to formation of membraneless organelles plays a critical role in many biochemical *** study of regulating LLPS is therefore central to the understanding of protein aggregation and disease-relevant *** report a fused in sarcoma protein(FUS)-derived low complexity(LC)sequence that undergoes LLPS in the presence of metal *** LC protein was constructed by fusing a hexhistidine-tag to the N-terminal low complexity domain(the residues 1–165 in QGSY-rich segment)of *** condensation of the intrinsic disordered protein into coacervate droplets was observed in the presence of metal ions that chelate oligohistidine moieties to form protein *** demonstrate the key role of metal ion-histidine coordination in governing LLPS behaviours and the fluidity of biomolecular *** taking advantage of competitive binding using chelators,we show the possibility of regulating dynamic behaviors of disease-relevant protein droplets,and developing a potential approach towards controllable biological encapsulation/release.

关键词： FUS Liquid-liquid phase separation Biomolecular condensate Membraneless organelles Protocells Metal coordination

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Post-Processing Time-Aware Optimal Scheduling of Single Robotic Cluster Tools

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IEEE/CAA Journal of Automatica Sinica 2020年第2期7卷 597-605页

作者： Qing Hua Zhu yan qiao NaiQi Wu yan Hou School of Computer Science and Technology Guangdong University of TechnologyGuangzhou 510006China Institute of Systems Engineering Macao University of Science and TechnologyTaipa 999078MacaoChina State Key Laboratory of Precision Electronic Manufacturing Technology and Equipment Guangdong University of TechnologyGuangzhou 510006China

Integrated circuit chips are produced on silicon *** cluster tools are widely used since they provide a reconfigurable and efficient environment for most wafer fabrication *** advances in new semiconductor materials bring about new functionality for integrated *** a wafer is processed in a processing chamber,the wafer should be removed from there as fast as possible to guarantee its high-quality integrated ***,maximization of the throughput of robotic cluster tools is *** work aims to perform post-processing time-aware scheduling for such tools subject to wafer residencytime *** do so,closed-form expression algorithms are derived to compute robot waiting time accurately upon the analysis of particular events of robot waiting for singlearm cluster *** are given to show the application and effectiveness of the proposed algorithms.

关键词： Cluster tool discrete event systems optimization robotic systems scheduling

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Superatom-assembled boranes,carboranes,and low-dimensional boron nanomaterials based on aromatic icosahedral B_(12)and C_(2)B_(10)

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Nano Research 2024年第7期17卷 6734-6740页

作者： qiao-qiao yan yan-Fang Wei Qiang Chen Yue-Wen Mu Si-Dian Li Institute of Molecular Science Shanxi UniversityTaiyuan 030006China

Using the experimentally known aromatic icosahedral superatoms I_(h)B_(12)H_(12)2−and D_(5d)1,12-C_(2)B_(10)H_(12)as building blocks and based on extensive density functional theory calculations,we predict herein a series of core–shell superpolyhedral boranes and carboranes in a bottom-up approach,including the high-symmetry Th B_(12)@B_(152)H_(72)2−(2),C2h C_(2)B_(10)@B_(152)H_(72)(3),D_(3d)B_(12)@B_(144)H_(66)(4),I_(h)B_(12)@C_(24)B_(12)0H_(72)2−(6),and D_(5d)C_(2)B_(10)@C_(24)B_(12)0H_(72)(7).More interestingly,the superatom-assembled linear D2h B_(36)H_(32)^(2−)(8),close-packed planar D_(3d)B_(84)H_(60)^(2−)(10),and nearly close-packed core−shell D_(3d)B_(12)@B144H_(6)6(4)can be extended periodically to form the one-dimensional(1D)α-rhombohedral borane nanowire B_(12)H_(10)(Pmmm)(9),two-dimensional(2D)α-rhombohedral monolayer borophane B_(12)H_(6)(P m1)(11),and the experimentally known three-dimensional(3D)α-rhombohedral boron(R m)(12)which can be viewed as an assembly of the monolayer B_(12)H_(6)(11)staggered in vertical direction,setting up a bottom-up strategy to form low-dimensional boron-based nanomaterials from their borane“seeds”via partial or complete *** bonding analyses indicate that the high stability of these nanostructures originates from the spherical aromaticity of their icosahedral B_(12)or C_(2)B_(10)structural units which possess the universal skeleton electronic configuration of 1S21P61D101F8 following the Wade’s n+1 *** infrared(IR)and Raman spectra of the most-concerned neutral B_(12)@B144H_(6)6(4)and C_(2)B_(10)@C_(24)B_(12)0H_(72)(7)are computationally simulated to facilitate their experimental characterizations.

关键词： superatom-assembling bottom-up approach density functional theory superpolyhedral boranes superpolyhedral carboranes borophanes

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Optimal Integrated Schedule of Entire Process of Dual-blade Multi-cluster Tools From Start-up to Close-down

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IEEE/CAA Journal of Automatica Sinica 2019年第2期6卷 553-565页

作者： Qinghua Zhu yan qiao Naiqi Wu IEEE the School of Computer Science and Technology Guangdong University of Technology the Helen and John C. Hartmann Department of Electrical and Computer Engineering New Jersey Institute of Technology the Institute of Systems Engineering Macao University of Science and Technology the National Key Laboratory of Precise Electronic Manufacturing Technology and Equipment Guangdong University of Technology

Multi-cluster tools are widely used in majority of wafer fabrication processes in semiconductor industry. Smaller lot production, thinner circuit width in wafers, larger wafer size, and maintenance have resulted in a large quantity of their start-up and close-down transient periods. Yet, most of existing efforts have been concentrated on scheduling their steady *** from such efforts, this work schedules their transient and steady-state periods subject to wafer residency constraints. It gives the schedulability conditions for the steady-state scheduling of dual-blade robotic multi-cluster tools and a corresponding algorithm for finding an optimal schedule. Based on the robot synchronization conditions, a linear program is proposed to figure out an optimal schedule for a start-up period, which ensures a tool to enter the desired optimal steady state. Another linear program is proposed to find an optimal schedule for a closedown period that evolves from the steady state period. Finally,industrial cases are presented to illustrate how the provided method outperforms the existing approach in terms of system throughput improvement.

关键词： Multi-cluster tools robots scheduling transient periods semiconductor manufacturing systems

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A Li_(3)Bi/LiF interfacial layer enabling highly stable lithium metal anode

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Rare Metals 2023年第12期42卷 4081-4090页

作者： Lei Tan Peng Chen qiao-Yun Chen Xing Huang kang-Yu Zou yan-Mei Nie Ling-Jun Li Changsha University of Science and Technology Changsha 410114China Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province College of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen 518060China

Lithium metal anode is considered the alternative to graphite anode due to its ultra-high theoretical capacity of 3860 mAh·g^(-1).However,serious Li dendrite growth and drastic electrolyte side reactions restrain the commercial application of Li metal *** this work,a Li_(3)Bi/LiF interfacial layer is constructed on the surface of the Li metal anode by a spontaneous substitution *** composite interfacial layer possesses excellent ionic conductivity,high mechanical strength,and great electrolyte wettability,which ensures fast Li-ion transfer and uniform Li deposition of the Li_(3)Bi/LiF@Li ***,the Li_3Bi/LiF@Li symmetric cell provides a cycle life of more than 400 h with only 73 mV voltage polarization at 10 mA·cm^(-2).By pairing with commercial NCM622 cathode,the Li_(3)Bi/LiF@Li full cell exhibits a long cycle at a rate of 2 C.

关键词： Lithium metal anode Li_(3)Bi LiF interfacial layer Dendrite-free High current density

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