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This paper discusses the consensus problem of networked multi-agent systems subjected to communication delays. Different from the robust control design, the accessible delay information among agents are exploited to compensate the delay effect on consensus. Two delay compensation schemes are proposed to improve the convergence of consensus and delay-dependent sufficient conditions in terms of linear...
Based on the hydrogeological conditions in the northern foot of Tianshan Mountain, the hydrogeological conception model is generalized, and then 3-D unsteady numerical model of groundwater is established. When the current hydraulic projects are kept unchanged, the model predicts water-level fluctuations from 30 September 2004 to 30 December under the condition of current exploitable methods of water...
The combustion process and emission characteristics in diesel engine mainly depend on the mixture formation in cylinder. Spray characteristic is an important factor which affects the mixture formation and combustion process. Further, nozzle hole cone angle of the fuel injector directly influence the spray characteristic. In this paper, flow evolution process, spray distribution, fuel/air ratio equivalence...
In this study, we establish a numerical model and use computational fluid dynamics (CFD) analysis to measure peak pressure on the surface of filter bag. The numerical results are in good agreement with the experimental data during the pulse cleaning process. Peak pressure on the surface of filter bag, pressure rise rate and maximum reverse acceleration are used as evaluation indicators of bag-cleaning...
Spectrum sensing is one of the most important technologies for cognitive radio. In order to decrease the effect of low SNR, and increase the reliability spectrum sensing performance, we propose a novel spectrum sensing approach, which collects the distributed collaborative beamforming signals as the test statistic to input the energy detector. In particular, the collaborative beamforming method can...
Numerical simulation method is a powerful technique for chaos analysis. The traditional analytic method can't predict the behavior of the piecewise linear system (PLS) exactly because of the non-smoothness of the system, if the system is strong nonlinearity. The piecewise linear vibration isolation system with single degree of freedom (SDOF) was studied in this paper. The “inverse” integral method...
Based on harnessing the Yellow River, a multi-nozzles pile extractor was developed. Multi-nozzles submerged jets of extracting pile component were simulated numerically by the RAN k-ε model and the Ansys software. The reasonable structure was attended and tested by experiment. The simulated numerically results showed that the simulated numerically method was an effective way which was used to study...
The Princeton Ocean Model (POM) is a three-dimensional baroclinic ocean model based on the original equations, using a sigma coordinate in the vertical coordinate to deal with significant topographical variability, and has been widely used for estuary and coastal ocean simulation. Wetting and drying is a common and important phenomenon of the coastal ocean, and the process could not be simulated by...
According to actual circumstance of Han Iron and Steel Company CSP, a three-dimensional mathematical model of fluid flow in the mould has been developed. The process of fluid flow is simulated in aid of fluid simulation software FLUENT, when we use two kinds of SEN separately in cast. The fluid flow in the mould is simulated at the difference of technical parameters (flow-guiding slot angle and submerge...
The Spalart-Allmaras turbulence model and the standard turbulence model were used to simulate the 3-D flow in low specific speed Francis runner with splitter blades and the simulating capability of these two models were compared. The calculation process was based on continuity equation and Navies-Stokes equation. The governing equations were discretized by finite-volume method and SIMPLIC method was...
Nowadays, the grinding disc design of big-screen glass screen follows the grinding disc design concept and equation of small-screen glass screen, so the entire glass screen surface was unable to be grinded uniformly and smoothly. Though the drive of the lapping mechanism is constant, it is difficult to describe its motion and set up a mathematical model for the constant dynamic contact between the...
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