共查询到19条相似文献,搜索用时 156 毫秒
1.
2.
3.
4.
5.
本文提出通过确定胶料混炼过程参数来预测混炼胶粘度质量指标(门尼粘度)的三种软测量的方法,通过主元分析法,确定混炼胶质量指标(门尼粘度)的软测量的辅助变量,并且比较了它们的软测量数据,指出基于神经网络的软测量技术优于其它两种软测量方法。 相似文献
6.
由华南理工大学工业装备与控制系张海教授、应用数学系贺德化教授等承担的化工部科研项目“密炼机混炼控制的智能化研究─—数学模型的建立及微机控制系统”于1997年3月12日在广州通过了由化工部科技司组织的技术鉴定。与会专家一致认为,该技术在混炼胶质量自动在线检测、控制和工艺的自动化两方面取得突破,处于国际领先水平。该技术根据橡胶混炼理论和密炼机流变分析,抓住混炼的实质,结合混炼工艺实际,运用数理统计等数学方法,在混炼结束时,即可给出混炼胶的粘度、分散性、比重、质量综合指标、遵守规程指标等五项参数。这比目前国… 相似文献
7.
8.
9.
10.
11.
12.
13.
This article describes an experimental methodology offering mixing efficiency criteria for granular materials in terms of their dispersion capability. This methodology is based on the analysis of the dispersion kinetics of colored, cohesive, tracer particles that progressively disagglomerate during stirring. The effects of certain critical parameters such as the mixer speed and the type of mixer are described. In terms of the mix design, the contribution of the largest particles to the dispersion kinetics, and therefore to the mixing efficiency, is highlighted. A simple comparison of the mixing efficiency of mixer/mix design/procedure sets is finally provided for such cementitious granular materials. 相似文献
14.
15.
16.
In the first part of this article, a mixing line for silica‐based compounds was thoroughly described and its performance was studied in terms of mixing fingerprints. Along the mixing line, the compound experiences a large spectrum of strain, stress and temperature conditions such that important “cascade” or “stream” effects occur. At a given point of the process, the material has an important strain‐stress‐temperature history that is obviously affecting its behavior during the subsequent steps, and the situation is further complicated by the in situ silanisation, which obviously must be complete for stabilized rheological properties to be obtained at the end of the line. In this second part of the article, results are reported which were obtained with a new and promising rheometrical technique, i.e., the so‐called Fourier Transform rheometry, implemented on a commercial torsional dynamic rheometer. As shown, Fourier Transform (FT) rheometry provides a number of information about the complex set of events that occur along the silica‐silane mixing line. Odd torque harmonics become significant as strain increases, and therefore the variation of torque harmonics with strain amplitude can be considered as the nonlinear viscoelastic “signature” of tested materials. Silica filled materials exhibit also a typical pattern, with a “bump” appearing in the 500% strain range, essentially on the third relative harmonic versus strain curves and changing as optimal silica dispersion and silinisation are achieved. The appropriate modeling of experimental results provide parameters with typical variations along the mixing line which are interpreted with respect to current views on the in situ silanisation process and are found in line with the mixing signatures analysis. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2009 相似文献
17.
A. Sahoo 《Powder Technology》2005,159(3):150-154
The mixing characteristic of large particles (Geldart BD type) has been investigated in a cylindrical gas-solid fluidized bed. Based on dimensional analysis, a correlation for the mixing index has been developed with the system parameters viz., average particle size of the mixture, initial static bed height, height of the particles' layer in the bed (from where the sample is drawn) and superficial velocity of the fluidizing medium. A theoretical model for the mixing index has been developed based on the counter flow of solids with circulation and horizontal dispersion. A comparison has been made for the values of the mixing index calculated by both the theoretical and the experimental models. 相似文献
18.
19.
通过应用水泥生料三组分配料的率值公式对不同化学成分的粘土进行理论计算,并应用数理统计分析方法选择和确定粘土的最佳内控指标中心值,同时,论述了粘土化学成分的波动对工艺控制参数的影响程度。该方法同样适用于其它原、燃材料内控指标的确定及其质量的波动对工艺控制参数的影响程度。 相似文献