In hydroelectric power plants, the rotor blades are eroded by the cavitation process. The erosion results in craters that are usually recovered by a manual welding process. The ROBOTURB project developed an automatized system, where a robot is used for recovery the rotor blade surfaces by welding process. The robot workspace is constrained by freeform surfaces and the collision imminency is con...

This paper focuses on the optimization of initiating dimensions of groove bearing in association with de- sired design of vehicle’s front structure which is made up of low carbon steels in the case of frontal collision. Axial bearing analysis is done numerically using nonlinear finite element code LS-DYNA. In this analysis, changes of two main parameters including measure of energy absorp...

Collision memory in IEEE 802.11 Distributed Coordination Function (DCF) has been detected. The collision memory can increase the physical collision rate and this effect is inherent to any DCF type of countdown. In this paper, we introduce a collision memory avoidance algorithm, called Constrained Priority Countdown Freezing (CPCF). The CPCF can completely or partially remove collision memory de...

the chemical components in the decoctions of chinese herbal medicines are not always the same as those in the crude herbs because of the insolubility or instability of some compounds. in this work, a high-performance liquid chromatography (hplc) coupled with electrospray ionization (esi) tandem mass spectrometry method was developed to explore dynamic variation patterns of aconitum alkaloids in...

The paper investigates the sensitivity of safe ship control to inaccurate data from the ARPA anti-collision radar system and to changes in the process control parameters. The system structure of safe ship control in collision situations and computer support programmes exploring information from the ARPA anti-collision radar are presented. Sensitivity characteristics of the multistage positional...

Abstract A coupled double distribution function lattice Boltzmann model with streaming-collision process is presented. In this model, continuity and momentum equations are recovered by a density energy equation total function, the specific-heat ratio Prandtl number flexible. At same time, used as update rule. Couette flow simulated numerical test. The results agreed relatively excellent analyti...