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Evaluation on the Thermal Stability and Hazards Behaviors of ADVN Using Green Thermal Analysis Approach
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作者 Chi-Min Shu Yi-Hong Chang Chen-Wei Chiu 《Journal of Civil Engineering and Architecture》 2016年第3期280-290,共11页
ADVN (2,2'-Azobis (2,4-dimethyl) valeronitrile), a free radical initiator, is widely applied for the polymerization reaction of polymers in the chemical industries. When ADVN releases free radical during the deco... ADVN (2,2'-Azobis (2,4-dimethyl) valeronitrile), a free radical initiator, is widely applied for the polymerization reaction of polymers in the chemical industries. When ADVN releases free radical during the decomposition process, it can accompany abundant heat and huge pressure to increase the possibility of thermal runaway and hazard, causing unacceptable thermal explosion or fire accidents. To develop an inherently safer process for ADVN, the thermal stability parameters of ADVN were obtained to investigate thermal decomposition characteristics using a DSC (differential scanning calorimetry) and TG (thermogravimetry). We used various kinetic models to completely depict the kinetic behavior and determine the thermal safety parameters for ADVN. The green thermal analysis approach could be used to substitute for complicated procedures and large-scale experiments of traditional thermal analysis methods, avoiding environmental pollution and energy depletion. 展开更多
关键词 ADVN (2 2'-Azobis (2 4-dimethyl) valeronitrile) green thermal analysis approach kinetic models thermal runaway and hazard thermal safety parameters.
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Influnce of three dimensional green biomass on Shanghai atmosphere enviroment by analysis with CIS technique
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《Global Geology》 1998年第1期101-101,共1页
关键词 CIS Influnce of three dimensional green biomass on Shanghai atmosphere enviroment by analysis with CIS technique
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An overview of a unified theory of dynamics of vehicle–pavement interaction under moving and stochastic load 被引量:2
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作者 Lu Sun 《Journal of Modern Transportation》 2013年第3期135-162,共28页
This article lays out a unified theory for dynamics of vehicle-pavement interaction under moving and stochastic loads. It covers three major aspects of the subject: pavement surface, tire-pavement contact forces, and... This article lays out a unified theory for dynamics of vehicle-pavement interaction under moving and stochastic loads. It covers three major aspects of the subject: pavement surface, tire-pavement contact forces, and response of continuum media under moving and stochastic vehicular loads. Under the subject of pavement surface, the spectrum of thermal joints is analyzed using Fourier analysis of periodic function. One-dimensional and two-dimensional random field models of pavement surface are discussed given three different assumptions. Under the subject of tire-pavement contact forces, a vehicle is modeled as a linear system. At a constant speed of travel, random field of pavement surface serves as a stationary stochastic process exciting vehicle vibration, which, in turn, generates contact force at the interface of tire and pavement. The contact forces are analyzed in the time domain and the frequency domains using random vibration theory. It is shown that the contact force can be treated as a nonzero mean stationary process with a normal distribution. Power spectral density of the contact force of a vehicle with walking-beam suspension is simulated as an illustration. Under the subject of response of continuum media under moving and stochastic vehicular loads, both time-domain and frequency-domain analyses are presented for analytic treatment of moving load problem. It is shown that stochastic response of linear continuum media subject to a moving stationary load is a nonstationary process. Such a nonstationary stochastic process can be converted to a stationary stochastic process in a follow-up moving coordinate. 展开更多
关键词 Vehicle-pavement interaction - Random field.Continuum medium - Spectral analysis ~ green's function.Linear system
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A Note on the Solution of Water Wave Scattering Problem Involving Small Deformation on a Porous Channel-Bed
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作者 S.Mohapatra M.R.Sarangi 《Journal of Marine Science and Application》 CSCD 2017年第1期10-19,共10页
The solution of water wave scattering problem involving small deformation on a porous bed in a channel, where the upper surface is bounded above by an infinitely extent rigid horizontal surface, is studied here within... The solution of water wave scattering problem involving small deformation on a porous bed in a channel, where the upper surface is bounded above by an infinitely extent rigid horizontal surface, is studied here within the framework of linearized water wave theory. In such a situation, there exists only one mode of waves propagating on the porous surface. A simplified perturbation analysis, involving a small parameter ε (≤1) , which measures the smallness of the deformation, is employed to reduce the governing Boundary Value Problem (BVP) to a simpler BVP for the first-order correction of the potential function. The first-order potential function and, hence, the first-order reflection and transmission coefficients are obtained by the method based on Fourier transform technique as well as Green's integral theorem with the introduction of appropriate Green's function. Two special examples of bottom deformation: the exponentially damped deformation and the sinusoidal ripple bed, are considered to validate the results. For the particular example of a patch of sinusoidal ripples, the resonant interaction between the bed and the upper surface of the fluid is attained in the neighborhood of a singularity, when the ripples wavenumbers of the bottom deformation become approximately twice the components of the incident field wavenumber along the positive x -direction. Also, the main advantage of the present study is that the results for the values of reflection and transmission coefficients are found to satisfy the energy-balance relation almost accurately. 展开更多
关键词 Porous bed bottom deformation perturbation analysis Fourier Transform green's function reflection coefficient transmission coefficient energy identity water wave scattering
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