Apatite-staffelite ore flotation efficiency improvement using two-stage slurry thickening

The studies were performed suggesting that the cause of P2O5 losses during apatite-staffelite ores (ASO) treatment are due to non-selective flocculation of fine classes during flotation. When using strong flocculants, special preparation of condensed slurries is necessary, ensuring their deflocculation before the flotation process. A scheme and mode of preparation of fine classes for the flotation process have been developed, including thickening of the classification overflows using strong anionic flocculants and deflocculation of the thickened product before the flotation process with reagents-dispersants used in the basic flotation mode. A mode of preparation of slimes of ASO ores for flotation is proposed, including thickening of the discharge of the classification operation using the anionic flocculant “Praestol-2540”, conditioning of the condensed product with additions of liquid glass and caustic soda in a ratio of 1 : 1, dilution and re-thickening of deflocculated slimes, consolidation and flotation thickened sludge and sand. The big laboratory tests have shown that the application of the developed regime provides a total increase in the extraction of P2O5 from ore from 70,1 to 71,5 % with an increase in the P2O5 content in apatite concentrate from 37,1 to 37,8 %, which makes the developed technology promising for processing refractory ASO at Kovdorsky GOK.

Activation Function: Absolute Function, One Function Behaves more Individualized

<p>Inspire by nature world mode, a activation function is proposed. It is absolute function.Through test on mnist dataset and fully-connected neural network and convolutional neural network, some conclusions are put forward. The line of accuracy of absolute function is shaked around the training accuracy that is different from the line of accuracy of relu and leaky relu. The absolute function can keep the negative parts as equal as the positive parts, so the individualization is more active than relu and leaky relu function. The absolute function is less likely to be over-fitting. Through teat on mnist and autoencoder, It is that the leaky relu function can do classification task well, while the absolute function can do generation task well. Because the classification task need more universality and generation task need more individualization. The pleasure irritation and painful irritation is not only the magnitude differences, but also the sign differences, so the negative parts should keep as a part.<b></b>Stimulation which happens frequently is low value, it is showed around zero in figure 1 . Stimulation which happens accidentally is high value, it is showed far away from zero in figure 1. So the high value is the big stimulation, which is individualization.</p><p><b></b></p>

Activation Function: Absolute Function, One Function Behaves more Individualized

<p>Inspire by nature world mode, a activation function is proposed. It is absolute function.Through test on mnist dataset and fully-connected neural network and convolutional neural network, some conclusions are put forward. The line of accuracy of absolute function is shaked around the training accuracy that is different from the line of accuracy of relu and leaky relu. The absolute function can keep the negative parts as equal as the positive parts, so the individualization is more active than relu and leaky relu function. The absolute function is less likely to be over-fitting. Through teat on mnist and autoencoder, It is that the leaky relu function can do classification task well, while the absolute function can do generation task well. Because the classification task need more universality and generation task need more individualization. The pleasure irritation and painful irritation is not only the magnitude differences, but also the sign differences, so the negative parts should keep as a part.<b></b>Stimulation which happens frequently is low value, it is showed around zero in figure 1 . Stimulation which happens accidentally is high value, it is showed far away from zero in figure 1. So the high value is the big stimulation, which is individualization.</p><p><b></b></p>

Bilateral posterior microphthalmos associated with papillomacular fold and severe hyperopia

La microphtalmie postérieure avec pli papillomaculaire est une anomalie rare. Elle affecte les deux yeux et ne s'accompagne habituellement pas d'autres anomalies oculaires ou générales. Elle se caractérise par un segment postérieur court avec un segment antérieur normal. Nous rapportons le cas d'une fille âgée de 10 ans qui consulte pour une baisse d'acuité visuelle progressive bilatérale, l'examen ophtalmologique des deux yeux retrouve une forte hypermétropie avec une meilleure acuité visuelle corrigée chiffrée à 08/10ème à droite et à 07/10eme à gauche, les segments antérieurs sont normaux, par contre au fond d'œil nous notons un aspect d'une papille pleine non excavée, un pli papillo-maculaire bilatéral, et une périphérie normale. L'échographie oculaire en mode A et B confirme la microphtalmie postérieure. La tomographie en cohérence optique (OCT) montre un aspect d'un pli rétinien de siège papillomaculaire qui intéresse les couches internes de la rétine avec respect des couches externes de la rétine et la choroïde. L'objectif de ce travail est d'analyser les caractéristiques cliniques du segment postérieur de l’œil au cours de la microphtalmie postérieure à travers cette observation et une revue de littérature.

Higgs mode in (2 + 1)-dimensional O(2) model

In this paper, we investigate the spectral functions of the Higgs mode in [Formula: see text] model, which can be experimentally realized in a two-dimensional Bose gas. Zero temperature limit is considered. Our calculation fully includes the 2-loop contributions. Peaks show up in the spectral functions of both the longitudinal and the scalar susceptibilities. Thus, this model cannot explain the disappearance of the response at the weak interaction limit. Neither it can explain the similarity between the longitudinal and the scalar susceptibilities in the visibility of the Higgs mode. A possible lower peak at about [Formula: see text] is also noted.

Threshold value estimation of journey-distance using generalized polynomial function

The present work demonstrates an experience in estimating the threshold value of journey distances travelled by transit passengers using generalized polynomial function. The threshold value of journey distances may be defined as that distance beyond which passengers might no more be interested to travel by their reported mode. A knowledge on this threshold value is realized to be useful to limit the upper-most slab of transit fare, while preparing of a length-based fare matrix table. Theoretically, the threshold value can be obtained at that point on the cumulative frequency distribution (CFD) curve of journey distances at which the maximum rate of change of the slope of curve occurs. In this work, the CFD curve of the journey distance values is empirically modelled using Newton’s Polynomial Interpolation method, which helps to overcome various challenges usually encountered while an assumption of a theoretical probability distribution is considered a priori for the CFD.

CHOICE OF TRANSPORTATION MODE – A THEORETICAL STUDY

Inefficient public transport is considered a normal problem in any city or country. The motivations of transportation users determine their choice of transportation mode. This paper is aimed to identify the reasons behind the choice of transportation mode among daily commuters. Specifically, this paper observes the quality of public transport offered towards the users and how it affects their decision on the transportation mode. To understand their motivations, a literature review study has been conducted to interpret their preferences on the quality of public transport. The result shows the indicators that can be measured in the quality of public transport. Several past kinds of research have discussed the measures in solving issues related to public transport to encourage people to use the service given.