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| 1 | Filtering Location Optimization for Defending Against Large-Scale BDoS Attacks显示文摘This paper focuses on selecting the appropriate filtering location to minimize the amount of filtering routers in the traceback-based packet filtering for defending against the large-scale Bandwidth denial-of-service(BDo S) attacks.The filtering location can be viewed as a resource allocation problem and further we formulate it to an integer linear programming model and design an exact and computationally efficient filtering location algorithm.The evaluation results show that our algorithm brings significant benefits in practice. | LU Ning WANG Yulong SHI Wenbo LI Guorui DIAO Ding | 2017 | Chinese Journal of Electronics2017，26，2： | 2 |
| 2 | Development of Operational Space Environment Technology System显示文摘With the increasing of users and the demands which are transforming from the monotonous traditional service to network service,Multiple space environment web applications including browser-client,rich-client and mobile-client applications have been developed by SEPC(Space Environment Prediction Center,NSSC,CAS)during the past few years.The architecture of Operational Space Environment Technology System(OSETS) that these applications rely on is described and the description of structural optimization of the architecture is provided.To demonstrate the evolution of the OSETS,three web application examples for e SpaceWx,Space Weather Situation Awareness Picture(SWSAP),Plug-and-Play SWx Analysis and Plotting Program(PPSWAP) are presented. | GONG Jiancun CAI Yanxia LIU Siqing SHI Liqin LU Guorui CHEN Zhaofeng BAO Lili | 2016 | 空间科学学报2016，36，5： | 1 |
| 3 | A needle tip CCEA microfluidic device based on enhanced Dean flow for cell washing显示文摘Particle/cell washing is an essential technique in biological and clinical manipulations.Herein,we propose a novel circular contraction-expansion array(CCEA)microdevice.It can be directly connected to a needle tip without connection tubes.Its small size and centrosymmetric structure are beneficial to low sample consumption,high connection stability,and a wide application range.Computational fluid dynamics(CFD)simulation results show that the CCEA structure can produce a stronger Dean flow and lead to faster particle/cell focusing than the circle structure and CEA structure with the same length.Experimentally,an optimal flow rate ratio of 1:3 and an optimal total flow rate of 120μL/min were found to ensure a stable fluid distribution.Under these conditions,rapid focusing of 10-20μm particles with high efficiencies was achieved.Compared with a normal CEA device using tubes,the particle loss rate could be reduced from 64 to 7%when washing 500μL of a rare sample.Cell suspensions with concentrations from 3×10^(5)/mL to 1×10^(3)/mL were tested.The high cell collection efficiency(>85%for three cell lines)and stable waste removal efficiency(>80%)reflected the universality of the CCEA microfluidic device.After the washing,the cell activities of H1299 cells and MCF-7 cells were calculated to be 93.8 and 97.5%,respectively.This needle-tip CCEA microfluidic device showed potential in basic medical research and clinical diagnosis. | Xin Shi Wei Tan Yuwen Lu Wenfeng Cao Guorui Zhu | 2021 | Microsystems & Nanoengineering2021，7，5： | 0 |
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