Stall is a common phenomenon in centrifugal pumps under low-flow conditions; it has significant impact on fatigue and can even damage mechanical structural components. Computational fluid dynamics was used to perform high-precision numerical calculations describe multiple operating conditions the computational domain. The accuracy of these simulations verified by comparing results with single-f...

Marine centrifugal pumps are mostly used on board ship, for transferring liquid from one point to another. Based the combination of orthogonal testing and numerical simulation, this paper optimizes structure a drainage trough typical low-specific speed pump, determines priority various geometric factors pump performance, obtains optimal impeller scheme. The influence tank internal flow is also ...

In this research, Artificial Neural Networks (ANNs) have been used as a powerful tool to solve the inverse kinematic equations of a parallel robot. For this purpose, we have developed the kinematic equations of a Tricept parallel kinematic mechanism with two rotational and one translational degrees of freedom (DoF). Using the analytical method, the inverse kinematic equations are solved for spe...

As network speeds increase, and network requirements diversify, networking hardware vendors are being pressed on two distinct fronts. To remain competitive, they must continually improve their cost/performance ratio at a pace faster than Moore’s Law. Over the past fifteen years, enterprise network speeds have increased by three orders of magnitude, from 10Mbps to 10Gbps, requiring that the cost...

FPGAs Boost Performance Levels of Wideband Digital Receivers Few component technologies have evolved as rapidly in the last few years as FPGAs (field programmable gate arrays). In this highly competitive market, each new generation of devices delivers faster speeds, improved density, larger memory resources, and more flexible interfaces. Totally new resources, such as dedicated hardware multipl...

There are approximately 50 muscles that control tail fin shape in most teleost fishes, and although myotomal muscle function has been extensively studied, little work has been done on the intrinsic musculature that controls and shapes the tail. In this study we measured electrical activity in intrinsic tail musculature to determine if these muscles are active during steady rectilinear locomotio...

The present study used an accelerated longitudinal design to examine group differences and age-related changes in processing speed in 81 individuals with autism spectrum disorder (ASD) compared to 56 age-matched individuals with typical development (ages 6-39 years). Processing speed was assessed using the Wechsler Intelligence Scale for Children-3rd edition (WISC-III) and the Wechsler Adult In...