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31篇 您的检索式:作者名="Guanglei Xu"
    题名 作者 年代 出处 被引量
1Horizontal-Based Orchestration for Multi-Domain SFC in SDN/NFV-Enabled Satellite/Terrestrial Networks显示文摘It's promising to use Software-Defined Networking(SDN) and Network Functions Virtualization(NFV) to integrate satellite and terrestrial networks. To construct network service function chains in such a multi-domain environment, we propose a horizontal-based Multi-domain Service Function Chaining(Md-SFC) orchestration framework. In this framework, multi-domain orchestrators can coordinate with each other to guarantee the end-to-end service quality. Intra-domain orchestrators also coordinate SDN controllers and NFV management components to implement intra-domain service function chains. Based on this, we further propose a heuristic SFC mapping algorithm with a cooperative inter-domain path calculation method to map service function chains to infrastructures. In this method, master multi-domain orchestrator and intra-domain orchestrators coordinate to select proper inter-domain links. We compare the cooperative method with a naive uncooperative way that domains' topology information is provided to the master multi-domain orchestrator and it calculates the shortest inter-domain path between intra-domain service function chains directly. Simulation results demonstrate that our solution is feasible. It is able to construct end-to-end performance guaranteed service function chain by horizontal-based cooperation. The cooperative inter-domain path calculation method decreasesthe mapping load for the master orchestrator and gets the same end-to-end performance.Guanglei Li Huachun Zhou Bohao Feng Guanwen Li Qi Xu 2018China Communications2018,15,5:11
2Annular electromagnetic stirring——a new method for the production of semi-solid A357 aluminum alloy slurry显示文摘A new method for producing semisolid slurry,annular electromagnetic stirring(AEMS),to refine and spheroidize grains was exploited.Experimental work was undertaken to investigate the effects of cooling rate,stirring power and stirring time on the solidification behavior of A357 alloy using A-EMS.It was found that increasing the cooling rate and stirring power gave rise to substantial grain refinement,which could be attributed to the increase of effective nucleation rate caused by the extremely uniform temperature and composition fields in the bulk liquid during the initial stage of solidification.Results showed that a fully grain refined spherical structure could be obtained using proper processing conditions within 10s.Guanglei ZHU Jun XU Zhifeng ZHANG Yuelong BAI Likai SHI 2009Acta Metallurgica Sinica(English Letters)2009,22,6:11
3Back analysis of mechanical parameters of roller compacted concrete dam显示文摘In view of the diversity and complexity of mechanical parameters of roller compacted concrete dam(RCCD),the uniform design method,partial least-squares regression(PLS)and least squares support vector machine(LSSVM)were applied to the back analysis of RCCD with the use of the complex nonlinear relationship between dam mechanical parameters and dam displacements.During the process of back analysis,the initial samples of parameters were designed with uniform design method.Then,a transversely isotropic model of RCCD was established by MSC.Marc software.Through this model,training samples of LSSVM model could be obtained.And then,the complex nonlinear relationship between relative values of hydraulic components of dam displacements and mechanical parameters was established.Finally,actual relative values of dam hydraulic components are isolated from the measured data of dam displacements by using PLS.By inputting the isolated relative values into LSSVM model,the back analysis values of RCCD mechanical parameters can be obtained.The example analysis showed that mechanical parameters obtained by the above-mentioned back analysis method are reasonable,and the back analysis method is feasible.GU ChongShi 1,2,3,LI Bo 1,XU GuangLei 4 &YU Hong 1,2,3 1 State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering,Hohai University,Nanjing 210098,China 2College of Water Conservancy Hydropower,Hohai University,Nanjing 210098,China 3National Engineering Research Center of Water Resources Engineering Safety,Efficient Utilization and Nanjing 210098,China 4 Nanjing Hydraulic Research Institute,Nanjing 210029,China 2010Science China(Technological Sciences)2010,53,3:8
4Cadmium pollution enhanced ozone damage to winter wheat:biochemical and physiological evidences显示文摘Combined effects of ozone (O3) and cadmium (Cd) on growth and physiology of winter wheat (Triticum aestivum L.cv.JM22) were determined.Wheat plants were grown without or with Cd and exposed to charcoal-filtered air (< 10 ppb O3) or elevated O 3 (80 ± 5 ppb,7 hr/day) for 20 days.Results showed that O 3 considerably depressed light saturated net photosynthetic rate (-20%),stomatal conductance (-33%),chlorophyll content (-33%),and total biomass (-29%) without Cd.The corresponding decreases were further enhanced by 45%,56%,60% and 59%,respectively with Cd,indicating a synergistic effect of O3 and Cd on wheat.Ozone significantly increased the activity of superoxide dismutase (46%),catalase (48%) and peroxidase (56%).However,great increases in malondialdehyde (MDA) content (2.55 folds) and intercellular CO2 concentration (1.13 folds) were noted in O3 +Cd treatment compared to control.Our findings demonstrated that the increased anti-oxidative activities in wheat plants exposed to O3 +Cd might not be enough to overcome the adverse effects of the combination of both pollutants as evidenced by further increase in MDA content,which is an important indicator of lipid peroxidation.Precise prediction model on O3 damages to crop should be conducted to ensure agricultural production security by considering environmental constraints in an agricultural system in peri-urban regions.Yong Li Caihong Li Yanhai Zheng Guanglei Wu Tana Wuyun Hong Xu Xinhua He Gaoming Jiang 2011Journal of Environmental Sciences2011,23,2:7
5Construction of 1D Heterostructure NiCo@C/ZnO Nanorod with Enhanced Microwave Absorption显示文摘Layered double hydroxides(LDHs)have a special structure and atom composition,which are expected to be an excellent electromagnetic wave(EMW)absorber.However,it is still a problem that obtaining excellent EMWabsorbing materials from LDHs.Herein,we designed heterostructure NiCo-LDHs@ZnO nanorod and then subsequent heat treating to derive NiCo@C/ZnO composites.Finally,with the synergy of excellent dielectric loss and magnetic loss,an outstanding absorption performance could be achieved with the reflection loss of−60.97 dB at the matching thickness of 2.3 mm,and the widest absorption bandwidth of 6.08 GHz was realized at 2.0 mm.Moreover,this research work provides a reference for the development and utilization of LDHs materials in the field of microwave absorption materials and can also provide ideas for the design of layered structural absorbers.Jianwei Wang Zirui Jia Xuehua Liu Jinlei Dou Binghui Xu Bingbing Wang Guanglei Wu 2021Nano-Micro Letters2021,13,11:7
6Magnetic manganese-based composites with multiple loss mechanisms towards broadband absorption显示文摘The weak dielectric properties and the lack of magnetic loss of manganese-based absorbers are obstructed as the new generation of electromagnetic wave absorption(EMA)materials applying in microelectronic devices.Herein,the sulfuration and subsequent compounding strategies have been employed to enhance the EMA performance of multi-shell nanosphere-shaped Mn_(2)O_(3)materials.With the narrow bandgap,the as-obtained MnS possesses reinforced electrical conductivity,which is conducive to conductivity loss.More importantly,the presence of potential difference between different phases will form space charge region at the heterogeneous interface,thus favoring interfacial polarization.Additionally,the improvement of magnetic loss is attributed to the presence of Co_(3)O_(4)nanoparticles.Consequently,the composites present enhanced EMA performance than original Mn_(2)O_(3).Specifically,the minimum reflection loss of as-prepared composites is−51.4 dB at the thickness of 1.8 mm and the broad effective absorption bandwidth reaches 6.2 GHz at 1.9 mm.The low matching thickness and high absorption efficiency in this work can provide a convincing reference when designing distinguished manganese-based absorbers.Yue Liu Zirui Jia Qianqian Zhan Yuhao Dong Qimeng Xu Guanglei Wu 2022Nano Research2022,15,6:6
7A phase inversion based sponge-like polysulfonamide/SiO_2 composite separator for high performance lithium-ion batteries显示文摘In this work,a sponge-like polysulfonamide(PSA)/SiO_2 composite membrane is unprecedentedly prepared by the phase inversion method,and successfully demonstrated as a novel separator of lithium-ion batteries(LIBs).Compared to the commercial polypropylene(PP) separator,the sponge-like PSA/SiO_2 composite possesses better physical and electrochemical properties,such as higher porosity,ionic conductivity,thermal stability and flame retarding ability.The LiCoO_2/Li half-cells using the sponge-like composite separator demonstrate superior rate capability and cyclability over those using the commercial PP separator.Moreover,the sponge-like composite separator can ensure the normal operation of LiCoO_2/Li half-cell at an extremely high temperature of 90 °C,while the commercial PP separator cannot.All these encouraging results suggest that this phase inversion based sponge-like PSA/SiO_2 composite separator is really a promising separator for high performance LIBs.Xiao Wang Gaojie Xu Qingfu Wang Chenglong Lu Chengzhong Zong Jianjun Zhang Liping Yue Guanglei Cui 2018Chinese Journal of Chemical Engineering2018,26,6:6
8Controllable synthesis of Ni/NiO@porous carbon hybrid composites towards remarkable electromagnetic wave absorption and wide absorption bandwidth显示文摘The reasonable design of the composition of the composite materials is of great significance to optimized the electromagnetic(EM)wave absorption performance.Herein,the Ni/NiO@C hybrid composites with tunable Ni proportion were successfully synthesized through a two-step process.With the assistance of X-ray diffraction with refinement treatment,the specific proportion of Ni of as-obtained hybrid composites could be obtained.Employing controlling calcination time to adjust the Ni content of Ni/NiO@C hybrid composites,it has been found that the composite carbonized at 500℃exhibited remarkable EM wave absorption with the minimum reflection loss(RLmin)of-49.1 dB at 4.9 mm and the widest effective absorption bandwidth(EABmax)of 4.56 GHz at 2.1 mm.Moreover,by adjusting the Ni source,the optimal EM wave absorption performance could be achieved.Results illustrated that the N3PC with the Ni proportion of 13.17%showed the RLm inas low as-51.1 dB at 2.4 mm and the EABmax was 5.12 GHz at 2.7 mm.It is worth noting that this work demonstrates the relevance of the composition and EM wave absorption performance of hybrid composites,which offers a feasible reference for the absorption mechanism of absorber.Xinfeng Zhou Zirui Jia Xingxue Zhang Bingbing Wang Wei Wu Xuehua Liu Binghui Xu Guanglei Wu 2021Journal of Materials Science & Technology2021,,28:5
9Semisolid microstructure evolution of AZ91D alloy under high shear rate显示文摘Experimental work was undertaken to investigate the effect of rotation speed on the solidification microstructure of AZ91D alloy using a twin-screw slurry maker.Then numerical simulation was used to investigate the effect of rotation speed on the flow filed and temperature field of the melt.It was found that increasing the rotation speed could give rise to substantial grain refinement,which can be attributed to the increase of effective nucleation rate caused by the extremely uniform temperature and dispersing any potential clusters of nucleation agents in the bulk liquid under dispersive mixing.ZHU Guanglei XU Jun ZHANG Zhifeng LIU Guojun 2011Rare Metals2011,30,1:4
10Efficient base editing in G/C-rich regions to model androgen insensitivity syndrome显示文摘Dear Editor, Most disease-associated genomic mutations are base substitutions and approximately half of pathogenic human single nucleotide polymorphisms (SNPs)are related to C-to-T substitutions in the ClinVar database.Base editors (BEs),which combine Casg-DIOA nickase and APOBEC (apolipoprotein B mRNA editing enzyme,catalytic polypeptide-like)or AID (activation-induced deaminase)cytidine deaminase family members, have been successfully applied to mediate C-to-T conversion in vitro and in vivo, providing a powerful tool to model or repair diseaserelated human SNPs.Jianan Li Zhen Liu Shisheng Huang Xiao Wang Guanglei Li Yuting Xu Wenxia Yu Shanshan Chen Yu Zhang Hanhui Ma Zunfu Ke Jia Chen Qiang Sun Xingxu Huang 2019Cell Research2019,29,2:3
11Polymer electrolytes for Li-S batteries:Polymeric fundamentals and performance optimization显示文摘Lithium-sulfur(Li-S) batteries have been considered as one of the most promising candidates to traditional lithium ion batteries due to its low cost,high theoretical specific capacity(1675 mAh g^(-1)) and energy density(2600 Wh kg^(-1)) of sulfur.Compared with traditional liquid electrolytes,polymer electrolytes(PEs) are ever-increasingly preferred due to their higher safety,superior compatibility,long cycling stability and so on.Despite some progresses on PEs,however,there remain lots of hurdles to be addressed prior to commercial applications.This review begins with native advantages for PEs to replace LEs,and then proposes the ideal requirements for PEs.Furthermore,a brief development history of typical PEs for Li-S batteries is presented to systematically summarize the recent achievements in Li-S batteries with PEs.Noted that the structure-performance relationships of polymer matrixes for PEs are highlighted.Finally,the challenges and opportunities on the future development of PEs are presented.We hold the view that composite polymer electrolytes in virtue of the high ionic conductivity and the compatible interfacial property will be promising solution for high performance Li-S batteries.Meifang Jiang Zengqi Zhang Ben Tang Tiantian Dong Hantao Xu Huanri Zhang Xiaolan Lu Guanglei Cui 2021Journal of Energy Chemistry2021,30,7:3
12Synergistic regulation of dielectric-magnetic dual-loss and triple heterointerface polarization via magnetic MXene for high-performance electromagnetic wave absorption显示文摘The single dielectric/magnetic loss mechanism and invalid polarization loss are the crucial issues which limit the exploitation of multi-component electromagnetic wave(EMW)absorption materials,especially Ti_(3)C_(2)T_(x) MXene based absorption materials.In this work,a series of loosely packed accordion-like 3D NiCo/CeO_(2)/Ti_(3)C_(2)T_(x) with tunable and high-efficient EMW absorption were fabricated by introducing self-assembled NiCo alloys on the surface of Ti_(3)C_(2)T_(x) and subsequent anchoring of CeO_(2).On the one hand,the magnetic NiCo particles and highly conductive Ti_(3)C_(2)T_(x) achieved the dielectric-magnetic dual-loss.On the other hand,the triple interfacial polarization among NiCo/CeO_(2)/Ti_(3)C_(2)T_(x) further enhanced the relaxation loss.In addition,the effects of cerium ions on tuning the compositional structure,electromagnetic parameters and impedance behavior of the composites are explored.The NiCo/CeO_(2)/Ti_(3)C_(2)T_(x)-0.1 performed a wide absorption bandwidth of 6.32 GHz at 1.9 mm,as well as,the minimum reflection loss value of-42.48 dB at 2.0 mm.This work putted forward a new synergistic regulation strategy of dielectric-magnetic dual-loss and triple heterointerface polarization via magnetic MXene for high-performance EMW absorption,which may shed new light on the fabrication of multiple-component synergistic loss absorption materials.Chunhua Sun Zirui Jia Shuang Xu Dongqi Hu Chuanhui Zhang Guanglei Wu 2022Journal of Materials Science & Technology2022,,18:2
13Lithium bis(oxalate)borate crosslinked polymer electrolytes for high-performance lithium batteries显示文摘Solid electrolytes play a vital role in solid-state Li secondary batteries,which are promising high-energy storage devices for new-generation electric vehicles.Nevertheless,obtaining a suitable solid electrolyte by a simple and residue-free preparation process,resulting in a stable interface between electrolyte and electrode,is still a great challenge for practical applications.Herein,we report a self-crosslinked polymer electrolyte(SCPE)for high-performance lithium batteries,prepared by a one-step method based on 3-methoxysilyl-terminated polypropylene glycol(SPPG,a liquid oligomer).It is worth noting that lithium bis(oxalate)borate(Li BOB)can react with SPPG to form a crosslinked structure via a curing reaction.This self-formed polymer electrolyte exhibits excellent properties,including high roomtemperature ionic conductivity(2.6×10^(-4) S cm^(-1)),wide electrochemical window(4.7 V),and high Li ion transference number(0.65).The excellent cycling stability(500 cycles,83%)further highlights the improved interfacial stability after the in situ formation of SCPE on the electrode surface.Moreover,this self-formation strategy enhances the safety of the battery under mechanical deformation.Therefore,the present self-crosslinked polymer electrolyte shows great potential for applications in high-performance lithium batteries.Xiao Wang Jujie Sun Changhao Feng Xiujuan Wang Minghan Xu Jingjiang Sun Ning Zhang Jun Ma Qingfu Wang Chengzhong Zong Guanglei Cui 2021Journal of Energy Chemistry2021,30,4:2
14Seven years of biochar amendment has a negligible effect on soil available P and a progressive effect on organic C in paddy soils显示文摘Little attention has been paid to how long-term application of crop straw and its biochar affects soil phosphorus(P)transformation and carbon(C)fractions.We conducted a 7-year field experiment including control treatment(chemical fertilizer only,CK),straw return(2.25 t ha^(−1)),and different amounts of biochar addition(11.25 t ha^(−1)(0.5%BC)and 22.5 t ha^(−1)(1.0%BC),to investigate influence of these amendments on soil C structure,P fractions,and their interaction with microorganisms.The 13C nuclear magnetic resonance and soil P sequence fractionation were applied to capture changes of soil C compositions and P pool.Compared to CK,straw and biochar amendments decreased alkyl C/O-alkyl C,which is conducive to increased soil organic C.The 0.5%BC and 1.0%BC treatments enhanced recalcitrant aromatic C by 69.0%and 131%,respectively.Compared to CK(101.2±33.32 mg kg^(−1)),the 0.5%BC and 1.0%BC treatments had a negligible effect on soil available P,while negative effects were observed in straw treatment(59.79±9.023 mg kg^(−1)).Straw and biochar amendments increased primary P and occluded P,whereas had negligible effect on organic P.Redundancy analysis and correlation analysis indi-cated that C compositions and P pool correlated to microbial community composition and enzyme activities,and aromatic C was the most related factor.Moreover,structural equation modeling indicated available P was most related to phosphatase activity and C composition.Our findings reveal the changes of soil P and C response under long-term crop straw and its biochar amendment,and can contribute toward improving understanding of the effect of biochar and straw return in future agriculture management.Jiahui Yuan Yu Wang Xu Zhao Hao Chen Guanglei Chen Shenqiang Wang 2022Biochar2022,4,1:1
15Electrospun poly( vinyl alcohol)/glucose oxidase biocomposite membranes for biosensor applications 显示文摘Ren Guanglei Xu Xinhua Liu Qiang 2006Reactive and Functional Polymers2006,66,12:1
16Electro- spun poly(vinyl alcohol)/glucose oxidase biocomposite mem- branes for biosensor applications显示文摘REN GUANGLEI XU XINHUA LIU QIANG 2006Reactive and Functiolral Polymers2006,66,12:1
17A polymer electrolyte with a thermally induced interfacial ion-blocking function enables safety-enhanced lithium metal batteries显示文摘Lithium metal batteries(LMBs)have recently been revitalized as one of the most promising electrochemical energy storage systems,owing to the ultrahigh specific capacity(3860 mAh g^(-1))and ultralow potential(-3.04 V vs.standard hydrogen electrode)of lithium metal anodes.However,safety hazards originating from lithium dendrite growth and pulverization during cycling and thermal stimulation present significant challenges to the practical application of LMBs.To address this issue,we have developed an in situ polymer electrolyte with thermally induced interfacial ion-blocking ability.We demonstrate that the repolymerization and deposition of residual vinylene carbonate in the as-prepared electrolyte under thermal abuse predominantly results in thermally induced ion blocking at the solid electrolyte interface,thus achieving superior LMB safety.The developed polymer electrolyte also yields superior cyclability in LMBs.This design philosophy provides a good paradigm for improving the safety of LMBs.Huanrui Zhang Lang Huang Hantao Xu Xiaohu Zhang Zhou Chen Chenhui Gao Chenglong Lu Zhi Liu Meifang Jiang Guanglei Cui 2022eScience2022,2,2:1
18Numerical simulation of die filling behavior of AZ91D in the semisolid process显示文摘In this work,numerical simulation of the die filling and solidification process of AZ91D semisolid alloy was investigated to produce a thin walled connecting rod demanding a high dimensional precision.The Carreau viscosity model was implemented to simulate the-ow behavior of semisolid slurry during the filling.The fitted constants for the Carreau model were used to verify the simulation results.The predicted results from this model were in good agreement with the experimental results.Then the verified Carreau model was designed to predict die filling,casting defects and casting process.It was found that the predicted results had a good correlation with those in the experiment.The optimum parameters were obtained with a slurry temperature of 590 °C,a die temperature of 250 °C and an injection velocity of 2 m/s.Zhu Guanglei Xu Jun Zhang Zhifeng Liu Guojun 2010China Foundry2010,7,2:1
19Recent progress on electrolyte functional additives for protection of nickel-rich layered oxide cathode materials显示文摘In advantages of their high capacity and high operating voltage,the nickel(Ni)-rich layered transition metal oxide cathode materials(LiNi_(x)Co_(y)Mn_(z)O_(2)(NCMxyz,x+y+z=1,x≥0.5)and LiNi_(0.8)Co_(0.15)Al_(0.05)O_(2)(NCA))have been arousing great interests to improve the energy density of LIBs.However,these Nirich cathodes always suffer from rapid capacity degradation induced by unstable cathode-electrolyte interphase(CEI)layer and destruction of bulk crystal structure.Therefore,varied electrode/electrolyte interface engineering strategies(such as electrolyte formulation,material coating or doping)have been developed for Ni-rich cathodes protection.Among them,developing electrolyte functional additives has been proven to be a simple,effective,and economic method to improve the cycling stability of Nirich cathodes.This is achieved by removing unfavorable species(such as HF,H_(2)O)or constructing a stable and protective CEI layer against unfavorable reactive species(such as HF,H_(2)O).Herein,this review mainly introduces the varied classes of electrolyte functional additives and their working mechanism for interfacial engineering of Ni-rich cathodes.Especially,key favorable species for stabilizing CEI layer are summarized.More importantly,we put forward perspectives for screening and customizing ideal functional additives for high performance Ni-rich cathodes based LIBs.Longshan Li Dingming Wang Gaojie Xu Qian Zhou Jun Ma Jianjun Zhang Aobing Du Zili Cui Xinhong Zhou Guanglei Cui 2022Journal of Energy Chemistry2022,31,2:1
20Three- dimensional effective elastic moduli for multidirectional filament- wound tube with lining 显示文摘Xu Guanglei Ruan Wenjun Wang Hao 2011Advanced Materials Research2011,,:1
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