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Linear constraint relations in biochemical reaction systems: I. Classification of the calculability and the balanceability of conversion rates

约束(计算机辅助设计) 生化工程 化学 热力学 生物系统 应用数学 数学 生物 物理 工程类 机械工程
作者
R. T. J. M. van der Heijden,Joseph J. Heijnen,C. Hellinga,B. Romein,K. Ch. A. M. Luyben
出处
期刊:Biotechnology and Bioengineering [Wiley]
卷期号:43 (1): 3-10 被引量:195
标识
DOI:10.1002/bit.260430103
摘要

Abstract Measurements provide the basis for process monitoring and control as well as for model development and validation. Systematic approaches to increase the accuracy and credibility of the empirical data set are therefore of great value. In (bio)chemical conversions, linear conservation relations such as the balance equations for charge, enthalpy, and/or chemical elements, can be employed to relate conversion rates. In a pactical situation, some of these rates will be measured (in effect, be calculated directly from primary measurements of, e.g., concentrations and flow rates), as others can or cannot be calculated from the measured ones. When certain measured rates can also be calculated from other measured rates, the set of equations, the accuracy and credibility of the measured rates can indeed be improved by, respectively, balancing and gross error diagnosis. The balanced conversion rates are more accurate, and form a consistent set of data, which is more suitable for further application (e.g., to calculate nonmeasured rates) than the raw measurements. Such an approach has drawn attention in previous studies. The current study deals mainly with the problem of mathematically classifying the conversion rates into balanceable and calculable rates, given the subset of measured rates. The significance of this problem is illustrated with some examples. It is shown that a simple matrix equation can be derived that contains the vector of measured conversion rates and the redundancy matrix R . Matrix R plays a predominant role in the classification problem. In supplementary articles, significance of the redundancy matrix R for an improved gross error diagnosis approach will be shown. In addition, efficient equations have been derived to calculate the balanceable and/or calculable rates. The method is completely based on matrix algebra (principally different from the graph‐theoretical approach), and it is easily implemented into a computer program. © 1994 John Wiley & Sons, Inc.

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