and graphs, economic and financial modeling, theoretical and quantum chemistry, chemical process simulation, mathematics and statistics, and power networks). The collection meets a vital need that artificially-generated matrices cannot meet, and is widely used by the sparse matrix algorithms community

chemical processes

There are two fundamental ways to view coupled systems of chemical equations: as continuous, represented by differential equations whose variables are concentrations, or as discrete, represented by stochastic processes whose variables are numbers of molecules. Although the former is by far more

Structural information. Chemical process models are typically large-scale but highly structured. Information on how the hierarchical components are connected can help to make the solution procedure more robust, reliable and orders of magnitude faster. Our ultimate goal is to develop structure

of process development. This paper presents a new stochastic modeling capability implemented in the ASPEN process simulator, which provides a useful tool for design, analysis and decision-making in the face of uncertainties. The use of this new capability is illustrated for simple and complex chemical

The chemical processing industry has faced challenges with achieving improvements in safety performance, and accidents continue to occur. When accidents occur, they usually have a confluence of multiple factors, suggesting that there are underlying complex systemic problems. Moreover, accident

A new approach to optimization of chemical processes

In this paper, an Integrated Computer Aided System (ICAS), which is particularly suitable for solving problems related to integrated design of chemical processes, ispresented. ICAS features include amodel generator (generation of problem specific models including model simplification and model

Supporting chemical process design within an integrated architecture

Reducing the operating costs of chemical processes is very beneficial in decreasing a company's bottom line numbers. Since chemical processes are usually run in steady-state for long periods of time, saving a few dollars an hour can have significant long term effects. However, the complexity