Dmitri A. Rachkovskij

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Distributed representations were often criticized as inappropriate for encoding of data with a complex structure. However Plate's Holographic Reduced Representations and Kanerva's Binary Spatter Codes are recent schemes that allow on-the-fly encoding of nested compositional structures by real-valued or dense binary vectors of fixed dimensionality. In this(More)
Dataset generators are useful for the evaluation of an algorithm’s performance because they allow control of the characteristics and amount of data used for benchmarking. We propose a dataset generator called DataGen that allows varying the number of input features and output classes, the complexity and realizations of class regions, the distributions of(More)
The purpose of the paper is to design and test neural network structures and mechanisms for making use of the information that is contained in the character strings for more correct recognition of the characters constituting these strings. Two neural networks are considered in the paper; both networks are combined into a joint recognition system. The first(More)
The paper develops a set of ideas and techniques supporting analogical reasoning throughout the life-cycle of terrorist acts. Implementation of these ideas and techniques can enhance the intellectual level of computer-based systems for a wide range of personnel dealing with various aspects of the problem of terrorism and its effects. The method combines(More)
We present an approach to similarity-based retrieval from knowledge bases that takes into account both the structure and semantics of knowledge base fragments. Those fragments, or analogues, are represented as sparse binary vectors that allow a computationally efficient estimation of structural and semantic similarity by the vector dot product. We present(More)
Two jamming cancellation algorithms are developed based on a stable solution of least squares problem (LSP) provided by regularization. They are based on filtered singular value decomposition (SVD) and modifications of the Greville formula. Both algorithms allow an efficient hardware implementation. Testing results on artificial data modeling difficult(More)
medium 250 words) Many researchers agree on the basic architecture of the "world model" where knowledge about the world required for organization of agent's intelligent behavior is represented. However, most proposals on possible implementation of such a model are far from being plausible both from computational and neurobiological points of view.(More)