• Reduced models of solute transport in blood vessels with general velocity fields. Coupled one dimensional flow and transport. The impact axial profiles on the diffusion coefficient. Efficient simulation momentum, vessel area, concentration. main result this paper is formulation derivation a model case profile varying cross section. We couple resulting advection-diffusion equation to reduced f...

In this paper, we propose a hybrid fuzzy logic-genetic algorithm for optimising a non-linear problem related to pressure vessel design. The fuzzy non-linear program that we obtain is solved using a Genetic Algorithm (GA), and a simulation was used for generating the initial population. The efficiency of some of the design optimisation algorithms are compared with the proposed approach of this s...

A behavioral study on the entry, stay and exit decisions of the fishers in Hawaii’s longline fishery was undertaken in a random utility framework by applying the multinomial logit (unordered) model. Pooled annual cross-sectional and time-series (1991–1998) data were used. The empirical results confirm that the entry, stay, and exit decisions are significantly associated with the earning potenti...

We consider in this paper the tracking control problem of an underactuated surface vessel moving on the horizontal plane. A reference feasible trajectory for the position and orientation of the surface vessel is planned so that it is consistent with vehicle dynamics. Using these reference values the dynamics of the vehicle is transformed to the error cascade structure. The proposed controller i...

In-stent restenosis, the maladaptive response of a blood vessel to injury caused by the deployment of a stent, is a multiscale system involving a large number of biological and physical processes. We describe a Complex Automata Model for in-stent restenosis, coupling blood flow, drug diffusion, and smooth muscle cell models, all operating on different time scales. The Haemodynamics is handled u...

Pulse-echo ultrasound signal formation can be simulated by numerical emulation of the process chain: emit signal – electromechanical emit transformation – wave propagation and scattering – electromechanical receive transformation – receive signal. The simulation software Field II is indented for simulation of linear ultrasound systems. We present an extension to Field II that enables the inclus...

For accurate determination of thickness-profile in vessel quantification, it is important to find appropriate vessel crosssections. To obtain vessel cross-sections, a centerline-based approach has been widely used, but it has several inherent problems causing improper cross-sections. First, this approach cannot define cross-sections in a unique way. Second, cross-sections are sensitive to the d...

In vivo, the position of the conductance catheter to measure vessel lumen cross-sectional area may vary depending on where the conductance catheter is deployed in the complex anatomical geometry of arteries, including branches, bifurcations, or curvatures. The objective here is to determine how such geometric variations affect the cross-sectional area (CSA) estimates obtained using the cylindri...

Offshore platforms and windmills are constructed by assembling huge mechanical structures transported heavy lift vessels. The construction process comprises two interconnected operations, the dynamic positioning (DP) of vessel lifting loads. DP system is commonly designed tuned for case that there no load or free-hanging (mode 1). During transition from to connected a which mounted platform 2),...

In order to solve the impact on accuracy of a life prediction model when initial crack angle curved surface is not 0°, traditional stress intensity factor revised by non-linear regression analysis method, and an optimized growth established. This paper takes bottle neck pressure vessel as research object, uses finite element method establish simulation with 0°. By analyzing factors different st...