Comparative Study of Clustering Algorithms in Text Mining Context

The spectacular increasing of Data is due to the appearance of networks and smartphones. Amount 42% of world population using internet [1]; have created a problem related of the processing of the data exchanged, which is rising exponentially and that should be automatically treated. This paper presents a classical process of knowledge discovery databases, in order to treat textual data. This process is divided into three parts: preprocessing, processing and postprocessing. In the processing step, we present a comparative study between several clustering algorithms such as KMeans, Global KMeans, Fast Global KMeans, Two Level KMeans and FWKmeans. The comparison between these algorithms is made on real textual data from the web using RSS feeds. Experimental results identified two problems: the first one quality results which remain for algorithms, which rapidly converge. The second problem is due to the execution time that needs to decrease for some algorithms

Evolution of Fermentation Parameters of Ensiled Sugar Beet Pulp During Storage

This study was carried out to evaluate the silage quality of sugar beet pulp throughout the storage period and so obtain useful information for farmers and livestock feed industry. All silages were prepared in bags of 50 kg in anaerobic conditions. Silages were sampled on months 0, 3 and 6.the results indicate a net decrease of the pH to around 3.8 after 3months silage and remained stable, an important increase of the lactic acid and a slight increase in the acetic acid. But there is a total absence of propionic acid and butyric acid and that after 3 months and 6 months silage. These results have allowed classifying silage 3 months and 6 months between a good and excellent. the results indicated that there is a positive and significant correlation between lactic and acetic acid (r = 0.955 **) and between DM and pH (r = 0 .630**), but there is a negative and significant correlation between pH and lactic acid (r = -0.896**), between DM and lactic acid (r = -0.731**), between acetic acid and pH (r= -0.921**) and between acetic acid and DM (r= -0.678**). Keywords: Sugar beet pulp; silage; VFAs; pH; Storage period

Trace Metal Elements in Different Categories of Drinking Water by Exploratory Analysis

The objective of this work was to assess the quality of different categories of water intended for human consumption through monitoring and quantification of metallic trace elements. Chosen study matrix was made up of tap water, bottled Moroccan water, bottled foreign water and finally surface water from Beni Mellal area: Ain Asserdoune and Bouyakoub. Four trace elements were studied namely: As, Cd, Cr and Pb. The assays were carried out using inductively coupled plasma technique equipped with Atomic Emission Spectrometer (ICP-AES). Dissimilarities between waters and correlations between metallic trace elements were carried out by Principal Component Analysis. According to the analytical results, Arsenic (As) would be much more present in foreign waters with an average value of 6.33µg/L followed by Moroccan surface water category with an average value of 6.191 µg/L. Cadmium (Cd) was also more present in Moroccan surface water category. Chromium (Cr) was much more present in Moroccan waters especially in natural water category with an average value of 45.65 µg/L followed by tap water with of 44.875 µg/L value. Lead (Pb) was much more present in Moroccan waters compared to foreign waters. Analysis results allow us to locate the different samples analyzed in relation to Moroccan drinking water standard and that of World Health Organization on the one hand and to classify different types of water according to their concentrations of metallic elements on the other hand

Effect of Conservation Technic and Storage Period on the Fiber Content: NDF ADF ADL for Sugar Beet Pulp

To preserve a fodder supposes to stabilize it as well as possible, in order to be able to store it several weeks or several months without it not deteriorating and that it preserves its initial food value at the fresh state. This stabilization can be obtained by dry mode or by silage process. The objective of this article was to present in which degree these various techniques will modify the food value of fodder and more precisely the contents of parietal components; we evoked in our case pressed sugar beet pulp, dehydrated pulp in the form of pellets and ensiled pulp. The got results made it possible to deduce in the case of the ensilage which the microbial activity favored the hydrolysis of the most soluble substances of fiber during fermentation that and by consequence it cause a drop in the content of fiber to neutral detergent NDF and of Hemicellulose on the other hand this lactic fermentation made increase the content of cellulose, ADF and lignin. Also the values of the NDF, the ADF and the ADL are higher in the silages in balls of 450Kg by comparing them with the bags of ensilages of 50Kg on the other hand the contents of hemicellulose and cellulose is slightly lower in the balls of 450 kg than in the bags of 50 kg. This study as made it possible to say as the contents of the ADF, the NDF, the ADL, cellulose and hemicellulose in the pulp preserved by silage are approximate to the contents of pulp on the outlet side of the press (T0) and are higher than the contents in pellets&nbsp