Abstract: Systems and methods for carbon dioxide-based energy storage and power generation are described. An example system is presented that includes a compressor operable to receive supercritical carbon dioxide (sCO2) and produce compressed sCO2, one or more thermal energy storage (TES) units operable to heat the compressed sCO2, a turbine operable to receive the heated and compressed sCO2 and output an sCO2 exhaust, and at least one of a generator or a propeller coupled to the turbine, where the generator is operable to produce electricity and the propeller is operable to produce thrust.

Abstract: Systems and methods for carbon dioxide-based energy storage and power generation are described. An example system is presented that includes a compressor operable to receive supercritical carbon dioxide (sCO2) and produce compressed sCO2, one or more thermal energy storage (TES) units operable to heat the compressed sCO2, a turbine operable to receive the heated and compressed sCO2 and output an sCO2 exhaust, and at least one of a generator or a propeller coupled to the turbine, where the generator is operable to produce electricity and the propeller is operable to produce thrust.

Abstract: Systems and methods for carbon dioxide-based energy storage and power generation are described. An example system is presented that includes a compressor operable to receive supercritical carbon dioxide (sCO2) and produce compressed sCO2, one or more thermal energy storage (TES) units operable to heat the compressed sCO2, a turbine operable to receive the heated and compressed sCO2 and output an sCO2 exhaust, and at least one of a generator or a propeller coupled to the turbine, where the generator is operable to produce electricity and the propeller is operable to produce thrust.

Abstract: A system and method provide integrated carbon-negative, geothermal-based, energy generation and storage. The embodiments produce dispatchable electricity at grid-scale by storing excess energy from the grid and generating its own energy. The excess energy may be taken from solar and wind sources. In one aspect, the subject technology is energy storage, energy generation, carbon utilization and sequestration, all in one. The technology has very high round-trip efficiency of storing energy and is carbon-negative which makes it far more sustainable than any competing energy storage technology.

Abstract: In some embodiments, a method can comprise receiving a query and determining one or more results for the query. In many embodiments, the one or more results can comprise one or more shelves, each shelf of the one or more shelves can comprise one or more facets, and each facet of the one or more facets can comprise one or more items. In various embodiments, the method can further comprise facilitating display of at least a portion of the one or more results for the query by facilitating display of at least the portion of the one or more results in a ranked order. In many embodiments, displaying the portion of the one or more results in a ranked order can comprise determining a composite score for each facet of the one or more facets of each shelf of the one or more shelves. Other embodiments of related methods and systems are also provided.

Abstract: A method including selectively aggregating a first set of filters for an item results list. The first set of filters can include multiple filter types, including category filters, facet filters, and price filters. The method also can include, for each filter in the first set of filters and each item in the item results list, determining user engagement statistics for the item when the filter has been applied. The method additionally can include generating a filter score for each filter in the first set of filters. The method further can include selecting a second set of filters from the first set of filters based on the filter scores of the filters in the second set of filters being above a threshold filter score. The method additionally can include applying space-constraint rules to the second set of filters to limit a quantity of filters in the second set of filters based on a ranking of the filters in the second set of filters and based on a screen size of a user device.

Abstract: In some embodiments, a method can comprise categorizing, in a database, one or more purchasing categories based at least in part on one or more queries. In some embodiments the one or more purchasing categories can comprise one or more products. The method can further comprise computing a set of browse categories of the one or more purchasing categories, loading the set of browse categories of the one or more purchasing categories into non-transitory memory, and receiving a query. In some embodiments, the method can further comprise determining one or more results for the query, the one or more results comprising a portion of the one or more products, analyzing intention of the query, and selecting a display configuration of the one or more results based at least in part on the intention. Other embodiments of related methods and systems are also provided.

Abstract: In some embodiments, a method can comprise receiving a search query and performing a search based at least in part on the search query. In many embodiments, the search can return a plurality of search results, the plurality of search results can comprise a plurality of attributes. In some embodiments, the method can further comprise selecting at least two of the plurality of search results and sorting an order of the at least two of the plurality of search results by a ranking of the plurality of attributes of the at least two of the plurality of search results, the ranking of the at least two of the plurality of attributes of the plurality of search results based at least in part on a context of the search query. In many embodiments, the method can comprise facilitating display of the at least two of the plurality of search results. Other embodiments of related methods and systems are also provided.

Abstract: A method including selectively aggregating a first set of filters for an item results list. The first set of filters can include multiple filter types, including category filters, facet filters, and price filters. The method also can include, for each filter in the first set of filters and each item in the item results list, determining user engagement statistics for the item when the filter has been applied. The method additionally can include generating a filter score for each filter in the first set of filters. The method further can include selecting a second set of filters from the first set of filters based on the filter scores of the filters in the second set of filters being above a threshold filter score. The method additionally can include applying space-constraint rules to the second set of filters to limit a quantity of filters in the second set of filters based on a ranking of the filters in the second set of filters and based on a screen size of a user device.

Abstract: In some embodiments, a method can comprise receiving a search query and performing a search based at least in part on the search query. In many embodiments, the search can return a plurality of search results, the plurality of search results can comprise a plurality of attributes. In some embodiments, the method can further comprise selecting at least two of the plurality of search results and sorting an order of the at least two of the plurality of search results by a ranking of the plurality of attributes of the at least two of the plurality of search results, the ranking of the at least two of the plurality of attributes of the plurality of search results based at least in part on a context of the search query. In many embodiments, the method can comprise facilitating display of the at least two of the plurality of search results. Other embodiments of related methods and systems are also provided.

Abstract: In some embodiments, a method can comprise receiving a search query for an item in a product catalog, the product catalog comprising one or more items and determining that a language of the search query is an unselected language. In many embodiments, the method can further comprise translating the search query into a selected language, performing a search of the search query based on the translation of the search query into the selected language, the search comprising search results in the selected language and the search results comprising at least a portion of the product catalog, and facilitating display of the search results in the selected language. Other embodiments of related methods and systems are also provided.

Abstract: In some embodiments, a method can comprise categorizing, in a database, one or more purchasing categories based at least in part on one or more queries. In some embodiments the one or more purchasing categories can comprise one or more products. The method can further comprise computing a set of browse categories of the one or more purchasing categories, loading the set of browse categories of the one or more purchasing categories into non-transitory memory, and receiving a query. In some embodiments, the method can further comprise determining one or more results for the query, the one or more results comprising a portion of the one or more products, analyzing intention of the query, and selecting a display configuration of the one or more results based at least in part on the intention. Other embodiments of related methods and systems are also provided.

Abstract: In some embodiments, a method can comprise receiving a query and determining one or more results for the query. In many embodiments, the one or more results can comprise one or more shelves, each shelf of the one or more shelves can comprise one or more facets, and each facet of the one or more facets can comprise one or more items. In various embodiments, the method can further comprise facilitating display of at least a portion of the one or more results for the query by facilitating display of at least the portion of the one or more results in a ranked order. In many embodiments, displaying the portion of the one or more results in a ranked order can comprise determining a composite score for each facet of the one or more facets of each shelf of the one or more shelves. Other embodiments of related methods and systems are also provided.