Momentum methods, such as heavy ball method (HB) and Nesterov’s accelerated gradient (NAG), have been widely used in training neural networks by incorporating the history of gradients into current updating process. In practice, they often provide improved performance over (stochastic) descent (GD) with faster convergence. Despite their empirical success, a theoretical understanding convergence ...

#include #include void nag_hier_mixed_init (Nag_OrderType order, Integer n, Integer ncol, const double dat[], Integer pddat, const Integer levels[], const double y[], const double wt[], const Integer fixed[], Integer lfixed, Integer nrndm, const Integer rndm[], Integer lrndm, Integer *nff, Integer *nlsv, Integer *nrf, double rcomm[], Integer lrcomm, Integer icomm[], Integer l...

Sensitive and rapid methods for speciation analysis of nanoparticulate Ag (NAg) and Ag(I) in complex matrices are urgently needed for understanding the environmental effects and biological toxicity of silver nanoparticles (AgNPs). Herein we report the development of a universal liquid chromatography (LC) method for rapid and high resolution separation of dissoluble Ag(I) from nanoparticles cove...

This study compares the dosimetry of high-dose-rate intracavitary brachytherapy (HDR-ICBT) performed with and without general anesthesia/spinal anesthesia (GA/SA) in patients with cervical carcinoma. We retrospectively retrieved the records of 138 HDR-ICBT applicator insertions performed in 46 patients: 69 performed with GA/SA (anesthesia group known as AG) in 23 patients, and 69 performed with...

The NAG Library is a collection of 1533 numerical subroutines, comprising almost a million lines of code which has undergone continued evolution, and been exercised by a large user community for over 36 years. It represents a vast knowledge base, whose re-invention is out of the question. Rather, the question is how to make this functionality available in 21st Century environments. To this end,...

The aim of this study was to examine Streptococcus mutans biofilm growth on both aged and non-aged restorative dental resins, which were submitted to therapeutic irradiation. Sixty-four disks of an esthetic restorative material (Filtek Supreme) were divided into 2 groups: aged group (AG) and a non-aged group (NAG). Each group was subdivided into 4 subgroups: non-irradiated and irradiated with 1...

To investigate whether the manipulation of brain excitability by transcranial direct current stimulation (tDCS) modulates the heart rate variability (HRV), the effect of tDCS applied at rest on the left temporal lobe in athletes (AG) and non-athletes (NAG) was evaluated. The HRV parameters (natural logarithms of LF, HF, and LF/HF) was assessed in 20 healthy men before, and immediately after tDC...

The acid-forming potential of lead/zinc (Pb/Zn) mine tailings at Lechang City of Guangdong Province was studied using both net acid generation (NAG) and acid-base accounting (ABA) methods. The pyritic and total sulfur contents of the tailings were 12.6% and 18.7%, respectively. The mean acid neutralization capacity (ANC) was 63.5 kg H2SO4/t while three oxidized tailings samples had an ANC less ...