POV-Ray is a freeware, stand-alone, world-class renderer that creates three-dimensional photo-realistic images taking as input a text file with the scene described in a script language known as POV-Ray Scene Description Language (SDL). Image synthesis languages like POV-Ray do not give detailed description of the surfaces of the objects they generate,and therefore it is quite difficult to use them for engineering computations. Rather than trying

This paper presents an identification method of the value of concentration in certain areas of rooms for edible mushroom culture medium, in the case where the introducing of the air represents the effect of the superposition of a flow convection (natural or artificial) and diffusion and of its recirculation, which acts as a feedback circuit. The result helps to understand how to conduct a recirculation phenomenon, and may constitute a basis for future

Computerized adaptive testing attempts to provide the most suitable question for an examinee depending on the examinee’s ability to achieve the best result. Maximum Likelihood Estimation (MLE) and Bayesian Likelihood Estimation (BLE) have been provided to solve ability estimation and have good results in the literature. The situation when the answer of an item does not conform with the examinee’s ability as expected nor standard derivation changes

A necessary strategy to improve our technologies is to provide them with useful pieces of deterministic previous knowledge about the processes and the equipment. Our attention was previously focused on the industrial control systems, implemented with low level devices (controllers, sensors, actuators), that need knowledge on the specific controlled plants as well as on the general theoretical foundations. This was done on-line with the help of internal

In some previous papers we presented a fuzzy-interpolative self-adaptive control architecture that is able to identify the current operating regime of the system by means of a qualitative analyze of the phase trajectory of the error. In this paper we are extending this technique in order to build a self-adjusting PID controller that can automatically set the input scaling factors. This way we can obtain simple interpolative controllers embedding

Call for Participation SOFA 2010 International Workshop SOFT COMPUTING APPLICATIONS July 15-17, 2010 Arad, Romania http://www.sofa2010.org SOFA 2009 workshop focuses on theory and application in the field of theoretical and applied computational intelligence and informatics. The aim is to provide platform for scientist, teachers, researchers and students as well to publish their papers and discuss the results. SOFA encourages the scientific communication

The interpolative control structures, in fuzzy or other variants, don't achieve very good performances when the controlled plant contains dead times. In [4] an interpolative adaptive controller is presented, named PSAIC, which for certain types of plants offers good performances regarding variations of the plant's parameters, and particulary for some small variations of the dead time. This paper enhances this structure so that it can have good performances

In the first part of the paper it is considered an electric drive with static torque with constant component and speed proportional component. Using the classic calculus of variations is determined the extremal control and trajectory and the overheating that ensures maximum exploitation of the system resources represented by the achievement of a maximum variation of speed in the acceleration processes. In the second part, based on the recent discoveries

This paper addresses robust adaptive sliding mode control for MIMO nonlinear systems in the presence of uncertainties and external disturbances. To achieve stability and performance, we propose a sliding mode control scheme with the design of a gain, whose gain is not constant and need to be adaptively updated. Unlike some existing methods for sliding mode control, no knowledge on the bound of uncertainty and disturbance is required to be known and

From hydroelectric Vidraru was built in Soviet style, as a barrage of weight. Hydroelectric Vidraru was conceived as a jewel, and just for that reason did not discount the material. Moreover, Central has been equipped with the best technology in the year '66. So far have not been re or major changes, so that this complex technology works perfectly then. The only novelty is that the alarm was installed seven years ago.