concrete deformation due to temperature and moisture condition will always develop simultaneously and interactively. the environmentally (hygral and thermally) induced stress and deformation are essential to concrete durability. to simulate the deformation of concrete caused by the coupling effect of temperature and moisture, a numerical simulation approach is proposed comprising analytical pro...

Optimization of drilling fluid parameters such as mud weight, salt concentration, and temperature is essential to alleviate instability problems during drilling through shale sections. The selection of suitable mud parameters can benefit from analyses that consider significant instability processes involved in shale-drilling–fluid interactions. This paper describes the development of analytical...

model predictive controller is widely used in industrial plants. uncertainty is one of the critical issues in real systems. in this paper, the direct adaptive simplified model predictive control (smpc) is proposed for unknown or time varying plants with uncertainties. by estimating the plant step response in each sample, the controller is designed and the controller coefficients are directly ca...

Collaborative localization is a special case for knowledge fusion where information is exchanged in order to attain improved global and local knowledge. We propose analytical as well as agent based simulation models for pedestrian dead reckoning (PDR) systems in agents collaborating to improve their location estimate by exchanging subjective position information when two agents are detected clo...

While Markov models have been extensively used to study the availability of replicated data, they cannot handle effectively network configurations where sites failures and network partitions have to be simultaneously considered. We had proposed in a previous paper a hierarchical decomposition method aimed at overcoming this limitation. While our method could provide closed form estimates of the...

In this paper we present a new model for calculating the capacitance of MEMS sensor with corrugated diaphragm. In this work the effect of residual stress is considered on deflection of diaphragm and capacitance of sensor. First, a new analytical analyzes have been carried out to derive mathematic expressions for central deflection of corrugated diaphragm and its relationship with residual stres...

BACKGROUND We have devised a protocol for the Brownian dynamics simulation of an analytical ultracentrifugation experiment that allows for an accurate and efficient prediction of the time-dependent concentration profiles, c(r, t) in the ultracentrifuge cell. The procedure accounts for the back-diffusion, described as a Brownian motion that superimposes to the centrifugal drift, and considers th...

Traditionally, ocean upwelling has been studied mostly from observational data and analytical models of simpliied ow situations. In many areas of (geophysical) uid dynamics, numerical analysis has gradually gained importance and caught up with, if not bypassed, experimental simulations or observations. But, recent laboratory experiments show the very complicated nature of upwelling fronts and i...

Construction projects are complex and risky. According to the literature, even profitable construction companies can fail due to poor cash flow. In order to survive in this rapidly changing environment, effective cash flow management is essential. Many unforeseen factors affect a construction project’s cash flow. The objective of the research presented in this paper is to examine the impact of ...