It is by no means clear that the demand and supply for financial assets by opaque institutions simply reflect retail forces. In the prevailing equilibrium models of securities markets, demand comes from the individuals solving portfolio optimization problems. However, when we take account of the intervening contractual relations under which opaque institutions operate, it seems heroic to think ...

The present study deals with the assessment of Langat River water quality with some chemometrics approaches such as cluster and discriminant analysis coupled with an artificial neural network (ANN). The data used in this study were collected from seven monitoring stations under the river water quality monitoring program by the Department of Environment (DOE) from 1995 to 2002. Twenty three phys...

As software technology becomes a core part of business enterprises in all market sectors, customers demand more flexible enterprise systems. This demand coincides with the increasing use of personal computers and today’s easy access to local and global communication networks, that together provide an excellent infrastructure for building open distributed systems. However, the specific problems ...

As software technology becomes a core part of business enterprises in all market sectors, customers demand more flexible enterprise systems. This demand coincides with the increasing use of personal computers and today’s easy access to local and global communication networks, that together provide an excellent infrastructure for building open distributed systems. However, the specific problems ...

Solving Robust Inventory Problems In this work we consider setting the optimal inventory control policies for a single buffer when demand is uncertain, in a robust framework. Unlike traditional inventory models we do not assume that the demand is random with a known distribution. Instead, demand can take values from a given uncertainty set. Our objective is to find the policy that minimize the ...

Time variable electricity tariffs have been introduced in many countries to properly price the cost of electricity generation over changing demand at different times of the day. In Ireland, the All Island Electricity Market (http: //allislandmarket.com) generates a whole-sale market price in half hour time slots, with prices sometimes varying by a factor of three between peak and nonpeak period...

This paper presents a genetic algorithm (GA) for solving a generalized model of single-item resource-constrained aggregate production planning (APP) with linear cost functions. APP belongs to a class of pro-duction planning problems in which there is a single production variable representing the total production of all products. We linearize a linear mixed-integer model of APP subject to hiring...

A novel version of Ant Colony Optimization (ACO) algorithms for solving continuous space problems is presented in this paper. The basic structure and concepts of the originally reported ACO are preserved and adaptation of the algorithm to the case of continuous space is implemented within the general framework. The stigmergic communication is simulated through considering certain direction vect...

We study a variant of the Stochastic Economic Lot Scheduling Problem (SELSP) in which a single production facility must produce several grades to meet random stationary demand for each grade from a common finished-goods (FG) inventory buffer with limited storage capacity. Demand that can not be satisfied directly from inventory is lost. Raw material is always available, and the production facil...

The US Postal Service is running a large deficit due to dropping demand for first-class mail services; Twitter is a popular social networking site with no current way to monetize fully its user-generated content; and the computer industry always needs new demand for its storage, networking, and imaging products. Prior work has ignored the possibility of solving all of these problems with one me...