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| 1 | VNF-FG design and VNF placement for 5G mobile networks显示文摘Network function virtualization(NFV) is envisioned as one of the critical technologies in 5thGeneration(5G) mobile networks. This paper investigates the virtual network function forwarding graph(VNFFG) design and virtual network function(VNF) placement for 5G mobile networks. We first propose a two-step method composed of flow designing and flow combining for generating VNF-FGs according to network service requests. For mapping VNFs in the generated VNF-FG to physical resources, we then modify the hybrid NFV environment with introducing more types of physical nodes and mapping modes for the sake of completeness and practicality, and formulate the VNF placement optimization problem for achieving lower bandwidth consumption and lower maximum link utilization simultaneously. To resolve this problem, four genetic algorithms are proposed on the basis of the frameworks of two existing algorithms(multiple objective genetic algorithm and improved non-dominated sorting genetic algorithm). Simulation results show that Greedy-NSGA-II achieves the best performance among our four algorithms. Compared with three non-genetic algorithms(random, backtracking mapping and service chains deployment with affiliation-aware), Greedy-NSGA-II reduces 97.04%, 87.76% and88.42% of the average total bandwidth consumption, respectively, and achieves only 13.81%, 25.04% and 25.41%of the average maximum link utilization, respectively. Moreover, using our VNF-FG design method and GreedyNSGA-II together can also reduce the total bandwidth consumption remarkably. | Jiuyue CAO Yan ZHANG Wei AN Xin CHEN Jiyan SUN Yanni HAN | 2017 | Science China(Information Sciences)2017，60，4： | 8 |
| 2 | A hybrid mean value related to the Dedekind sums and Kloosterman sums显示文摘The main purpose of this paper is using the properties of character sum and the analytic method to study a hybrid mean value problem related to the Dedekind sums and Kloosterman sums,and give some interesting mean value formulae and identities for it. | ZHANG WenPeng & LIU YanNi Department of Mathematics,Northwest University,Xi’an 710127,China | 2010 | Science China Mathematics2010，53，9： | 5 |
| 3 | Energy harvesting aware topology control with power adaptation in wireless sensor networks显示文摘 | Qian Tan Wei An Yanni Hart Yanwei Liu Song Ci Fang-Ming Shao Hui Tang | 2015 | Ad Hoc Networks2015，，27： | 1 |
| 4 | Enhanced inhibition of talc flotation using acidified sodium silicate and sodium carboxymethyl cellulose as the combined inhibitor显示文摘The flotation separation of chalcopyrite and talc is challenging due to their similar natural floatability characteristics.Besides,it is usually difficult to effectively inhibit talc by adding sodium carboxymethyl cellulose(CMC)alone during chalcopyrite flotation.Here,a combined inhibitor comprising acidified sodium silicate(ASS)and CMC was employed to realize effective flotation separation of chalcopyrite and talc,and the combined inhibition mechanism was further investigated.Microflotation results showed that adding ASS strengthened the inhibitory effect of CMC on talc and improved the separation of chalcopyrite and talc.The zeta potential,Fourier transform infrared,and X-ray photoelectron spectroscopy analysis indicated that CMC was mainly adsorbed on the talc surface via hydroxyl and carboxyl groups.Moreover,the addition of ASS improved the adsorption of carboxyl groups.Furthermore,the adsorption experiments and apparent viscosity measurements revealed that adding ASS dispersed the pulp well,which reduced the apparent viscosity,improved the adsorption amount of CMC on the talc surface,and enhanced the inhibition of talc in chalcopyrite flotation. | Jiwei Xue Huazhen Tu Jin Shi Yanni An He Wan Xianzhong Bu | 2023 | International Journal of Minerals,Metallurgy and Materials2023，30，7： | 1 |
| 5 | PERMANENCE AND PERIODIC SOLUTION OF NONAUTONOMOUS DELAY LOTKA-VOLTERRA DIFFUSION SYSTEM显示文摘This paper analyzes permanence, existence and global attractivity of positiveperiodic solution in nonautonomous delay diffusive Lotka-Volterra competitive system fora patchstyle environment, by applying the invariant rectangle and Lyapunov functional. | XIAO Yanni(Institute of Mathematics, Academia Sinica, Beijing 100080, China)WANG Weidong(Deportment of Mathematics and Computer Hubei Institute for Nationalities, Enshi 445000, China)CHEN Jufang(Department of Mathematics, Shaanxi Normal University, Xi’an | 1999 | Systems Science and Mathematical Sciences1999，12，4： | 0 |
| 6 | Green-synthesized,low-cost tetracyanodiazafluorene(TCAF) as electron injection material for organic light-emitting diodes显示文摘Two electron-deficient azaacenes including di-and tetra-cyanodiazafluorene(DCAF and TCAF)with the advantages of deep lowest unoccupied molecular orbital(LUMO),green-synthesis,low-cost,simply purification method,excellent yields have been obtained,characterized and used as electron injection materials(EIMs)in three groups of electroluminescence devices.Device B with TCAF as EIM exhibited the best performance including turn-on voltage of 5.0 V,stronger maximum luminance intensity of 31,549 cd/m2,higher luminance efficiency of 62.34 cd/A and larger power efficiency of 21.74 lm/W which are 0.53,6.7,9.3 and 15.3 times than that of device A with DCAF as EIMs,respectively.The enhanced interfacial electron injection ability of TCAF than that of DCAF is supported by its better electron mobility in electron-only device,deeper LUMO(-4.52 eV),and stronger electronic affinity.Best external quantum efficiency of 16.56%was achieved with optimized thicknesses of TCAF as EIM and TPBi as electron transporting layer.As a new comer of acceptor family,TCAF would push forward organic electronics with more fascinating and significant applications. | Bing Yang Jianfeng Zhao Zepeng Wang Zhenlin Yang Zongqiong Lin Yanni Zhang Jiewei Li Linghai Xie Zhongfu An Hongmei Zhang Jiena Weng Wei Huang | 2019 | Chinese Chemical Letters2019，30，11： | 0 |
| 7 | Evaluation and analysis of auditory attributes of vehicle noise by use of Chinese expressions显示文摘用车辆噪音的听觉的属性的汉语的维数和表情被调查。首先,三问询表调查被完成用汉语获得听觉的描述符的大数字,然后二主观陪审团测试被完成获得一个类似矩阵并且基于配对的比较和语义微分途径评价描述符。由多维的可伸缩和主要部件分析的使用,最后,为相等大声的车辆噪音的听觉的属性以相应于“粗糙”的三个中国形容词被决定并且表示,“清晰度”和“变化”。 | CHEN Ke'an WANG Na MA Miao ZHANG Yanni YAN Liang | 2009 | Chinese Journal of Acoustics2009，28，2： | 0 |
| 8 | PRECIPITATION HARDENING OF ELINVAR ALLOY显示文摘The microstructural evolution and precipitation hardening of an Elinvar alloy doped with Tiand Al during isothermal aging at 700℃ have been investigated by atom probe field ionmicroscopy and microhardness measurements.The γ′ precipiates are spherical and coherentwith the matrix.The chemical composition of the precipitates are(Ni0.53Fe0.473 (Ti0.(?)Al0.4).During aging,a Lifshitz-Wagner type dissolution and coarsening reaction of the precipitateshas been observed,The hardness of the material varies with the aging time and reaches maxi-mum when the average diameter of the precipitates was about 11 nm. | LIU Zhiguo CHEN Yong CAO Yanni Nanjing University,Nanjing,ChinaZHU Zhengsheng Shaanxi Iron and Steel Institute,Xi’an,China Professor,Dept.of Physics,Nanjing,University,Nanjing 210008,China | 1991 | Acta Metallurgica Sinica(English Letters)1991，4，1： | 0 |
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