Abstract: A plurality of training iterations is conducted for a machine learning task. A given iteration includes generating a version of a stacking model using a portion of a labeled data set. Proposed labels are then obtained in the iteration using the generated version of the stacking model for a set of unlabeled records. The unlabeled records and their proposed labels are then used to generate versions of base models for the iteration. After the training iterations are completed, a trained ensemble of models including the stacking model and the base models is stored.

Abstract: Query types for which responses are to be generated with respect to records comprising text attributes are identified, including a text interpretation query type for which records may comprise one or more response-contributor strings. Results of the text interpretation query for a record are based at least partly on an extracted-property class of the records. A machine learning model comprising a first sub-model and a second sub-model is trained to extract results of the text interpretation query. The first sub-model generates an extracted-property class for a record, and the second sub-model predicts positions of response-contributor strings within the record based at least in part on the extracted-property class. A trained version of the model is stored.

Abstract: Similarity detection methods and systems are provided that utilize a convolutional neural network model to jointly learn string matching and semantic textual similarity as an image recognition solution. For example, in some embodiments described herein, the similarity detection system may receive two strings as input, transform the two strings into two separate vectors, generate a high-resolution image and a low-resolution image, apply one or more convolutional operations to each image, and determine string matching and semantic textual similarity based at least partly on the high-resolution image and the low-resolution image.

Abstract: Techniques are provided herein for utilizing a query variations engine. An attribute category for a search query may be identified from a search query history. A search query may be received from a user and a set of search results may be determined. A reduced set of search results may be generated from the set of search results based at least in part on the attribute category identified from the search query history. The user may be provided with the reduced set of search results.

Abstract: Technologies are disclosed herein for generating and utilizing machine-learning generated classifiers configured to identify document relationships. Manually-generated data is captured that indicates if documents in a document corpus have a relationship with one another, such as duplicates or variations. A determination may then be made as to whether a classifier is to be generated based on the duplicate decision data. If a classifier is to be generated, machine learning may be performed using training documents from the document corpus and the duplicate decision data to generate a classifier. The machine-learning generated classifier may then be utilized in a production environment to determine whether a new document is a duplicate of documents in the document corpus and/or to identify other relationships between documents in the document corpus, such as documents that are similar or are variations of one another.