This paper introduces a “qualitative” problem solving task that humans arc adept at, but one which has not received much attention within the qualitative physics community. This is the task of predicting the operation of a simple mechanical device, itt tertits of spatial behaviors of its components, front a labeled schematic ciiagranm of the device showing the spatial cotmfigttration of its com...

* Correspondence: [email protected] Department of Basic Courses, Hebei Finance University, Baoding 071000, China Abstract This article is concerned with the following rational difference equation yn+1 = (yn + yn-1)/(p + ynyn-1) with the initial conditions; y-1, y0 are arbitrary positive real numbers, and p is positive constant. Locally asymptotical stability and global attractivity of the ...

This paper presents qualitative behavior modeling of Information Processing Components(IPCs), which are domain-specific software components for modeling reusable functions in database management systems(DBMSs). After introducing a detailed formal syntax of IPCs, we propose their modular, qualitative behavior generation mechanism. The proposed mechanism is based on qualitative modeling and simul...

Substantial progress has been made in building and simulating qualitative models . However, the result s of qualitative simulation may be difficult to under stand and programs for explaining them have been fe w and have had a number of limitations . This paper describes a system, Expound, which provides causal natural language explanations of events in provabl y "faithful" abstractions of behav...

Several studies of multiprogrammed parallel systems have observed that dynamic equiallocation policies have high performance for a variety of speciic parallel workloads. However, only very incomplete information is available about which workload parameters are key determinants of policy performance and how the mean response times of equiallocation policies behave as a function of key workload p...

This paper is a survey on the approaches and results concerning the encountered behaviors and the qualitative properties of a class of bio-inspired dynamical learning machines. An overview and some results of several qualitative behaviors encountered both in natural and artificial dynamical systems – including synchronization and the dynamics affected by time-delays are presented in the main pa...

* Correspondence: [email protected] Department of Basic Courses, Hebei Finance University, Baoding 071000, China Abstract This article is concerned with the following rational difference equation yn+1 = (yn + yn-1)/(p + ynyn-1) with the initial conditions; y-1, y0 are arbitrary positive real numbers, and p is positive constant. Locally asymptotical stability and global attractivity of the ...

Semiquantitative models combine both qualitative and quantitative knowledge within a single semiquantitative qualitative differential equation (SQDE) representation. With current simulation methods, the quantitative knowledge is not exploited as fully as possible. This paper describes dynamic envelopes — a method to exploit quantitative knowledge more fully by deriving and numerically simulatin...

A qualitative physics predicts and explains the behavior of mechanisms in qualitative terms. The goals for the qualitative physics are (1 ) to be far simpler than the classical physics and yet retain all the important distinctions (e.g., state, oscillation, gain, momentum) without invoking the mathematics of continuously varying quantities and differential equations, (2) to produce causal accou...