This blog provides an overview of how to build a Machine Learning model with details on various aspects such as data pre-processing, splitting the training and testing data, regression/classification, and finally model evaluation. Machine Learning (ML) is a branch of artificial intelligence based on the idea that systems can learn from data, identify patterns, and make decisions. ML systems are trained rather than explicitly programmed. It provides efficient tools for data analysis, data pre-processing, model building, model evaluation, and much more. So in this blog we will implement various ML models with the help of Scikit learn(sk-learn), which is a simple open-source Machine Learning library.

Cybersecurity firm RiskSense, which has been at the forefront of diagnosing persistent threats for many years, on Tuesday announced a dashboard to warn companies how much they may be at risk from various kinds of ransomware. The service, available as an update to the company's subscription-based SaaS software, is a visual monitor that shows various data, such as the number of vulnerabilities found across an enterprise's systems. It can be used not only to assess the situation but to plan a sequence of steps to remediate the matter. The dashboard is based on signals coming from typical enterprise security monitors such as those sold by Rapid7. CEO and co-founder Dr. Srinivas Mukkamala told ZDNet the intention at some point is to fold into the product neural network capabilities for additional kinds of analysis such as regression analysis.

Credit card frauds are a "still growing" problem in the world. Losses in frauds were estimated in more than US$27 billion in 2018 and are still projected to grow significantly for the next years as this article shows. With more and more people using credit cards in their daily routine, also increased the interest of criminals in opportunities to make money from that. The development of new technologies puts both criminals and credit card companies in a constant race to improve their systems and techniques. With that amount of money at stake, Machine Learning is surely not a new word for credit card companies, which have been investing on that long before it was a trend, to create and optimize models of risk and fraud management.

To Build a perfect model, you need a large amount of data. But finding the right dataset for your machine learning and data science project is sometimes quite a challenging task. There are many organizations, researchers, and individuals who've shared their work, and we will use their datasets to build our project. So in this article, we are going to discuss 20 Machine learning and Data Science dataset and project ideas that you can use for practicing and upgrading your skills. The Enron Dataset is popular in natural language processing.

Possibilistic fuzzy c-means (PFCM) algorithm is a reliable algorithm has been proposed to deal the weakness of two popular algorithms for clustering, fuzzy c-means (FCM) and possibilistic c-means (PCM). PFCM algorithm deals with the weaknesses of FCM in handling noise sensitivity and the weaknesses of PCM in the case of coincidence clusters. However, the PFCM algorithm can be only applied to cluster complete data sets. Therefore, in this study, we propose a modification of the PFCM algorithm that can be applied to incomplete data sets clustering. We modified the PFCM algorithm to OCSPFCM and NPSPFCM algorithms and measured performance on three things: 1) accuracy percentage, 2) a number of iterations to termination, and 3) centroid errors. Based on the results that both algorithms have the potential for clustering incomplete data sets. However, the performance of the NPSPFCM algorithm is better than the OCSPFCM algorithm for clustering incomplete data sets.

We propose a novel method to explain trained deep neural networks (DNNs), by distilling them into surrogate models using unsupervised clustering. Our method can be applied flexibly to any subset of layers of a DNN architecture and can incorporate low-level and high-level information. On image datasets given pre-trained DNNs, we demonstrate the strength of our method in finding similar training samples, and shedding light on the concepts the DNNs base their decisions on. Via user studies, we show that our model can improve the user trust in model's prediction.

When there is so much data that they become a computation burden, it is not uncommon to compute quantities of interest using a sketch of data of size $m$ instead of the full sample of size $n$. This paper investigates the implications for two-stage least squares (2SLS) estimation when the sketches are obtained by a computationally efficient method known as CountSketch. We obtain three results. First, we establish conditions under which given the full sample, a sketched 2SLS estimate can be arbitrarily close to the full-sample 2SLS estimate with high probability. Second, we give conditions under which the sketched 2SLS estimator converges in probability to the true parameter at a rate of $m^{-1/2}$ and is asymptotically normal. Third, we show that the asymptotic variance can be consistently estimated using the sketched sample and suggest methods for determining an inference-conscious sketch size $m$. The sketched 2SLS estimator is used to estimate returns to education.

Over the past few years, there has been a considerable spread of microarray technology in many biological patterns, particularly in those pertaining to cancer diseases like leukemia, prostate, colon cancer, etc. The primary bottleneck that one experiences in the proper understanding of such datasets lies in their dimensionality, and thus for an efficient and effective means of studying the same, a reduction in their dimension to a large extent is deemed necessary. This study is a bid to suggesting different algorithms and approaches for the reduction of dimensionality of such microarray datasets. This study exploits the matrix-like structure of such microarray data and uses a popular technique called Non-Negative Matrix Factorization (NMF) to reduce the dimensionality, primarily in the field of biological data. Classification accuracies are then compared for these algorithms. This technique gives an accuracy of 98%.

While neural networks excel at predicting a single-point estimate of a given target for complex machine learning problems, an open research question is the design of neural generative models able to output a predictive distribution, that can capture the inherent variability of the observations or the model's level of confidence in its predictions. The main motivation behind uncertainty quantification is the design of AI systems for critical applications that are safe, and are mitigating risks while automatizing decision-making. On one hand, Bayesian statistics offer a mathematically grounded framework to reason about uncertainty; however, such models generally require prohibitive computational costs, which make them not widely used in practice. On the other hand, frequentist methods and metrics have been developed for confidence estimation in neural networks, in particular in the classification setting [Brosse et al., 2020], [Corbière et al., 2019].

Predicting the link between two nodes is a fundamental problem for graph data analytics. In attributed graphs, both the structure and attribute information can be utilized for link prediction. Most existing studies focus on transductive link prediction where both nodes are already in the graph. However, many real-world applications require inductive prediction for new nodes having only attribute information. It is more challenging since the new nodes do not have structure information and cannot be seen during the model training. To solve this problem, we propose a model called DEAL, which consists of three components: two node embedding encoders and one alignment mechanism. The two encoders aim to output the attribute-oriented node embedding and the structure-oriented node embedding, and the alignment mechanism aligns the two types of embeddings to build the connections between the attributes and links. Our model DEAL is versatile in the sense that it works for both inductive and transductive link prediction. Extensive experiments on several benchmark datasets show that our proposed model significantly outperforms existing inductive link prediction methods, and also outperforms the state-of-the-art methods on transductive link prediction.