Springer japan jul 2019 (2 risultati)

Taschenbuch. Condizione: Neu. This item is printed on demand - it takes 3-4 days longer - Neuware -This book presents a fresh, new approach in that it provides a comprehensive recent review of challenging problems caused by imbalanced data in prediction and classification, and also in that it introduces several of the latest statistical methods of dealing with these problems. The book discusses the property of the imbalance of data from two points of view. The first is quantitative imbalance, meaning that the sample size in one population highly outnumbers that in another population. It includes presence-only data as an extreme case, where the presence of a species is confirmed, whereas the information on its absence is uncertain, which is especially common in ecology in predicting habitat distribution. The second is qualitative imbalance, meaning that the data distribution of one population can be well specified whereas that of the other one shows a highly heterogeneous property. A typical case is the existence of outliers commonly observed in gene expression data, and another is heterogeneous characteristics often observed in a case group in case-control studies. The extension of the logistic regression model, maxent, and AdaBoost for imbalanced data is discussed, providing a new framework for improvement of prediction, classification, and performance of variable selection. Weights functions introduced in the methods play an important role in alleviating the imbalance of data. This book also furnishes a new perspective on these problem and shows some applications of the recently developed statistical methods to real data sets. 68 pp. Englisch.…

Buch. Condizione: Neu. This item is printed on demand - it takes 3-4 days longer - Neuware -This book provides for the first time the microfoundations of evolutionary economics, enabling the reader to grasp a new framework for economic analysis that is compatible with evolutionary processes. Any independent approach to economics must include a value theory (or price theory) and price and quantity adjustment processes. Evolutionary economics has rightly and successfully concentrated its efforts on explaining evolutionary processes in technology and institutions. However, it does not have its own value theory and is not capable of explaining the workings of everyday economics processes, in which any evolutionary process would take place.Our point of departure is the addition of myopic agents with severely limited rational and forecasting capacities (in stark contrast to mainstream economics). We show how myopic agents, in a complex world, can produce a stable price system and demonstrate how they can adjust their production to changing demand flows. Agents behave without any knowledge of the overall process, and they generate a stable economy as large as the global network of exchanges. This is the true 'miracle' of the market mechanism. In contrast to mainstream general equilibrium theory, this miracle can be explained without the need for an auctioneer or infinitely rational agents. Thanks to this book, evolutionary economics can now claim to be an independent approach to economics that can completely replace mainstream neoclassical economics. 364 pp. Englisch.…