In this paper, we investigate the problem of efficiently computing a multi-way spatial join without spatial indexes. We propose a novel and effective filtering algorithm based on a two phase partitioning technique. To avoid missing hits due to an inherent difficulty in multi-way spatial joins, we propose to firstly partition a join graph into sub-graphs whenever necessary. In the second phase, ...

The antioxidant potentials for fourteen multipurpose traditional herbal preparations sold in South Africa were determined using the DPPH radical scavenging, ferric reducing power and β-carotene-linoleic acid model system, the anti-HIV-1 reverse transcriptase (RT) enzyme inhibitory effects using an ELISA kit and acetylcholinesterase (AChE) enzyme inhibition using the microtitre plate assay. Nine...

In this paper, a Wav2Vec2.0 neural network based on an attention mechanism is proposed to locate defects in array ultrasonic testing signals. This method does not require knowledge of the priori condition sample sound velocity or feature extraction scattering First, piezoelectric system used detect signal through hole at different positions plate structure. Then, three networks—1D-CNN, Muti-Tra...

A bstract We compute the normalization of multiple D-instanton amplitudes in type IIB string theory and show that result agrees with prediction S-duality due to Green Gutperle.

Research on semantics in Genetic Programming (GP) has increased dramatically over the last number of years. Results in this area clearly indicate that its use in GP can considerably increase GP performance. Motivated by these results, this paper investigates for the first time the use of Semantics in Muti-Objective GP within the well-known NSGA-II algorithm. To this end, we propose two forms of...

Powder-based additive manufacturing (AM) is an important technology in fabricating complex 3D products. In powder-based AM, a powder deposition system plays key role determining the resolution, density, and properties of printed parts. An acoustic-actuated particle approach, which utilizes acoustic waves to actuate glass nozzle, enables particles cost-effective way. However, capability programm...