In this paper, we deal with the task of sub-event detection in evolving events using posts collected from the Twitter stream. By representing a sequence of successive tweets in a short time interval as a weighted graph-of-words, we are able to identify the key moments (sub-events) that compose an event using the concept of graph degeneracy. We then select a tweet to best describe each sub-event...

introduction flood is a natural hazard that its occurrences can be observed more frequently in recent years. for better flood mitigation and control, it is needed to identify flood production factors and determine the high potential flood areas. hydrological model is a simplified representation of natural system and the rainfall-runoff model is one of the most frequently used events for flood s...

In visual recognition, sub-categorization has been proposed to deal with large intraclass variance of samples in a category. Instead of learning a single classifier for each category, discriminant sub-categorization approaches divide a category into several subcategories and simultaneously train classifiers for each sub-category. In this paper, we propose a novel approach for discriminative sub...

The photocatalytic degradation of the commercial reactive Black5 (RB5), Blue19 (RB19), Green19 (RG19), Red120 (RR120), and Yellow81 (RY81) in aqueous solution and sunlight were examined in the presence of Fe2O3 and the mixture Fe2O3/H2O2 as catalysts. The results showed that the photocatalytic degradation followed first-order...

citizen relationship management is a novel approach for public sector and governmental organization to improve their services and to achieve citizen satisfaction. the main purpose of this study is to identify and prioritize customer segmentation in governmental organizations. for the reason, based on reviewing the literature, four group of psychological, demographic, behavioral, and situation f...

DOI: 10.1002/aenm.201501590 electrochemical stability window, and (3) chemical compatibility with the anode and cathode. In the past few years, major advances have been achieved in increasing the Li ionic conductivity of the solid electrolytes. The state-of-the-art solid electrolyte materials, such as Li-garnet Li 7 La 3 Zr 2 O 12 (LLZO) and Li 10 GeP 2 S 12 (LGPS) have achieved an ionic conduc...

This paper investigates a novel multiple-history long short-term memory (MH-LSTM) RNN acoustic model to mitigate the robustness problem of noisy outputs in the form of mis-labeled data and/or mis-alignments. Conceptually, after an RNN is unfolded in time, the hidden units in each layer are re-arranged into ordered sub-layers with a master sub-layer on top and a set of auxiliary sub-layers below...