Table of Contents

Part II   Foundations of Modeling

3 The Structure of Models 85

  The Importance of Storage Elements in Dynamical Systems 86

  An Example: The Balance of Amounts of Water 88

  Accumulating Quantities and Accounting 96

  Describing Amounts Stored in a System 104

  Describing Processes 107

  The General Law of Balance 109

  Constitutive Laws 111

  Constitutive Laws and Laws of Balance 115

  The Mathematical Structure of Models 117

  Boundary Value Problems 122

  Model Structure and Modeling Methodology 128

  Summary 130

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