This paper presents a modeling approach for three-dimensional simulation of hydraulic fracturing of jointed rock. Dynardo developed a 3D-hydraulic fracturing simulator and coupled the simulator with leading edge calibration and optimization algorithms to offers the software base to optimize gas production with computer simulation. With the integrated approach, an effective 3D numerical reservoi...

Empirical studies pose the problem of the physiological integration of the tree organism, which is also important on the scale of ecosystems. Recently, spatially distributed models emerged, which approach this problem by reflecting the close linkage between physiological processes and the structures of trees and tree stands. In the case of water flow, the tree organism can be regarded as hydrau...

This paper describes the design and implementation of an automatic hydraulic circuit design system using case-based reasoning (CBR) as one of successful Knowledge Engineering paradigms. The domain of hydraulic circuit design and case-based reasoning are briefly reviewed. Then a proposed methodology in automatic circuit design and dynamic learning with the use of CBR is described. Finally an app...

The process of developing two types of virtual hydraulic experiment supporting animations used in courseware are described: (1) schematic diagram-based 2D virtual hydraulic circuits using Flash, and (2) VRMLbased 3D virtual hydraulic equipments. The effects and students’ attitudes on the two approaches are surveyed and analyzed. 2009 Wiley Periodicals, Inc. Comput Appl Eng Educ 19: 315 326, 201...

One possible structure of a PANDA fiber is proposed and the effects of hydraulic stress on the propagation properties are studied in this work. The proposed PANDA fiber can withstand up to 1500MPa external hydraulic stress while maintaining the fundamental mode of propagation. Effects of hydraulic pressure on several propagation properties such as birefringence, beat length, effective index, di...

There are applications of barrier technology where the variability in hydraulic conductivity from point to point in the barrier, in addition to the average hydraulic conductivity of the barrier, is important. Throughout this chapter, the following application will be referred to in order to demonstrate this point: use of a circumferential soil-bentonite cutoff wall to completely enclose a conta...

Most field soils exhibit soil spatial variability as well as soil structure. The challenge is to account adequately for both types of spatial heterogeneity in simulation models. A numerical finite element code was used to compare singleand dual-permeability approaches for modeling variably saturated flow and transport in two-dimensional heterogeneous soil systems. The code was based on the Rich...

This paper describes the design and implementation of a hydraulic circuit design system using case-based reasoning (CBR) paradigm from AI community. The application domain of hydraulic circuit design and case-based reasoning are briefly reviewed. Then a proposed methodology in computer-aided circuit design and dynamic learning with the use of CBR is described. Finally an application example has...

Hydraulický lis so systémom LS pre modelovaniu procesov plastických deformácií At first, the paper describes destination of the presented hydraulic press. Next, the substance of load sensing (LS) systems’ operation was introduced, and electro-hydraulic system of this type, installed in laboratory hydraulic press, was described. The control and measurement circuit of the device was also describe...