Abstract. We present two new classes of pattern search algorithms for unconstrained minimization: the rank ordered and the positive basis pattern search methods. These algorithms can nearly halve the worst case cost of an iteration compared to the classical pattern search algorithms. The rank ordered pattern search methods are based on a heuristic for approximating the direction of steepest des...

Sequential Pattern Mining is an efficient technique for discovering recurring structures or patterns from very large dataset widely addressed by the data mining community, with a very large field of applications, such as cross-marketing, DNA analysis, web log analysis, user behavior, sensor data, etc. The sequence pattern mining aims at extracting a set of attributes, shared across time among a...

this paper submitting the computation of optimize point of ordering in inventory control systems and particularly for continuous review of ordering system (r,q) by fuzzy logic method which similarly can be used for other ordering systems. since in the ordering models we cannot forecast the parameters like cost exactly, we have ambiguity. in this case using precise parameters may cause wrong dec...

The nature of radiotherapy accelerators is briefly explained. It is argued that these complex safety-critical systems need a systematic basis for testing their software. The paper describes a novel application of protocol specification and testing methods to radiotherapy accelerators. An outline specification is given in LOTOS (Language Of Temporal Ordering Specification) of the accelerator con...

A semi-formal method for deriving test cases from specifications in LOTOS is described. The method is applied to the LAP-B standard, for which a complete LOTOS specification was developed. Execution trees are derived from the specification by using an interpreter, and test cases are obtained by inspection. The results of our experiment compare favorably with the ones obtained in an earlier work...

In transition metal oxides, preferential occupation of specific d orbitals on the transition metal ion can lead to the development of a long-range ordered pattern of occupied orbitals. This phenomenon, referred to as orbital ordering, is usually observed indirectly from the cooperative Jahn-Teller distortions (CJTDs) that result as a consequence of the orbital ordering. This paper examines the ...

It has been shown recently that the efficiency of direct search methods that use opportunistic polling in positive spanning directions can be improved significantly by reordering the poll directions according to descent indicators built from simplex gradients. The purpose of this paper is twofold. First, we analyze the properties of simplex gradients of nonsmooth functions in the context of dir...

Current models for software components have made componentbased software engineering practical. However, these models are limited in the sense that their support for the characterization/specification of design components primarily deals with syntactic issues. To avoid mismatch and misuse of components, more comprehensive specification of software components is required, In this paper, we prese...

A recently proposed Minimum Discarded Fill (MDF ) ordering (or pivoting) technique is e ective in nding high quality ILU (`) preconditioners, especially for problems arising from unstructured nite element grids. This algorithm can identify anisotropy in complicated physical structures and orders the unknowns in a \preferred" direction. However, the MDF ordering is costly, when ` increases. In t...

In 1996 a project was undertaken to determine the clinical impact of blood cultures taken in the emergency department. It found that 1.6% of all blood cultures taken resulted in changes in patient management. In response to these findings, guidelines were developed for more appropriate utilisation of blood cultures. It was predicted that the guidelines would result in a reduction in test orderi...