Niklas Donges

About Me

Niklas Donges is Machine Learning Engineer at SAP. He is a Technical Blogger for the 'Towards Data Science' publication

The Random Forest Algorithm

Random Forest is a flexible, easy to use machine learning algorithm that produces, even without hyper-parameter tuning, a great result most of the time. It is also one of the most used algorithms, because it’s simplicity and the fact that it can be used for both classification and regression tasks. In this post, you are going to learn, how the random forest algorithm works and several other important things about it.

Agile and Non-Agile Project Management

Software project management is the practice of planning and executing software projects. Its concepts need to be understood by every team member to ensure a smooth project flow. There are different methodologies that can be mainly divided into structured and flexible approaches. The most common approach, which gained a lot of popularity in recent years, is called “Agile”. This is a flexible approach based on delivering requirements iteratively and incrementally throughout the project life cycle. This post, will give you a gentle introduction to agile and non-agile project management approaches with the focus on the Scrum Methodology. 

Pros and Cons of Neural Networks

Neural networks are great for some tasks but not as great for others. Huge amounts of data, more computational power, better algorithms and intelligent marketing increased the popularity of Deep Learning and made it into one of the hottest fields right now. On top of that, Neural Networks can beat nearly every other Machine Learning algorithms and the disadvantages that go along with it. The biggest disadvantages are their „black box“ nature, increased duration of development (depending on your problem), the required amount of data and that they are mostly computational expensive.

Introduction to NLP

Natural language processing (NLP) is an area of computer science and artificial intelligence that is concerned with the interaction between computers and humans in natural language. The ultimate goal of NLP is to enable computers to understand language as well as we do. It is the driving force behind things like virtual assistants, speech recognition, sentiment analysis, automatic text summarization, machine translation and much more. In this post, you will learn the basics of natural language processing, dive into some of its techniques and also learn how NLP benefited from the recent advances in Deep Learning.

Transfer Learning

Transfer Learning is the reuse of a pre-trained model on a new problem. It is currently very popular in the field of Deep Learning because it enables you to train Deep Neural Networks with comparatively little data. This is very useful since most real-world problems typically do not have millions of labeled data points to train such complex models. This blog post is intended to give you an overview of what Transfer Learning is, how it works, why you should use it and when you can use it. 

The Logistic Regression Algorithm

Logistic Regression is one of the most used Machine Learning algorithms for binary classification. In this post, you will learn what Logistic Regression is and how it works. You can have a solid understanding of its advantages and disadvantages and know when you can use it. Also, you can discover ways to use Logistic Regression to do multiclass classification with sklearn and why it is a good baseline to compare other Machine Learning algorithms with 

Evaluation Metrics for Classification

Using the right evaluation metrics for your classification system is crucial. Otherwise, you could fall into the trap of thinking that your model performs well but in reality, it doesn’t. In this post, you will learn why it is trickier to evaluate classifiers, why high classification accuracy is in most cases not as desirable as it sounds, what the right evaluation metrics are and when you should use them. You will also discover how you can create a classifier with virtually any precision you want.

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