4results about How to "Meet the needs" patented technology

This invention discloses a search ranking model generation method, ranking display method, apparatus, and device. The method includes: acquiring multiple historical input items entered by a user in a search box, a list of historical suggestion words corresponding to each historical input item, and historical search items determined by the user in the historical suggestion word list; forming positional bias-eliminating sample data based on the historical input items, the historical suggestion word list, and the historical search items; and training a deep learning model based on the positional bias-eliminating sample data, using a ranking loss function as the optimization objective, to obtain a search ranking model. This method, by focusing on positional bias information in the sample data, can generate a search ranking model that better conforms to relevance ranking, thereby facilitating the obtaining of suggestion word ranking results that better meet user needs through this search ranking model.

The utility model discloses a kind of ammonia circulation gas turbine-double turbine expander combined structure, including air supply unit, compressor, combustor, gas turbine and flue gas discharge channel being sequentially connected in series, and coil pipe, booster pump, turbine expander, compressor is mechanically linked with gas turbine by a rotating shaft, first coil pipe is filled with ammonia decomposition catalyst, liquid ammonia supply unit is sequentially connected booster pump, second coil pipe, first turbine expander, first coil pipe, second turbine expander and fuel regulating valve by pipeline, finally access the fuel inlet of combustor;The output end of first turbine expander and second turbine expander is connected kinetic energy conversion device respectively.The utility model is to the staged utilization of ammonia fuel energy by double turbine expander, combined with the heat exchange of flue gas waste heat in coil pipe and the chemical energy release of ammonia decomposition, when not combined with heat and power, single machine thermal efficiency can be as high as 70% or more, compared with traditional single cycle gas turbine efficiency is greatly improved.

The utility model relates to the technical field of water level switches, and discloses a Hall type water level switch, which comprises a water level switch body and is characterized in that a floating ball in sliding fit with the water level switch body is arranged on the water level switch body; a plurality of magnets are arranged in the floating ball; a circuit board is arranged in the water level switch body; a Hall chip U1 is arranged on the circuit board; a VCC pin of the Hall chip U1 is connected with a capacitor C; a GND pin of the Hall chip U1 is grounded and forms a first wire end; the OUT pin of the Hall chip U1 is connected with a resistor R; the other end of R forms a second wire end; the first wire end and the second wire end are used for providing signal transmission for the Hall chip U1; according to the utility model, the Hall proximity switch can be simplified from an original three-wire wiring mode to a two-wire wiring mode, so that the requirement of an electronic product can be better met, and the trouble that the Hall switch can be accessed only by modifying a circuit is avoided.

The utility model discloses a kind of inertial measurement combination centroid measuring tools, centroid measuring tool includes rectangular frame and two supports, frame outside is rotatably installed on two supports by pivot;Frame has inertial unit installation structure;In the frame two edge frames connected with pivot, level is equipped on one edge frame, scale with scale mark is equipped on another edge frame, cursor is equipped on scale and can slide along the length direction of scale, weight is hung below cursor.Pivot constitutes fulcrum, cursor, weight constitutes one end of moment of force, inertial unit (including shock absorber) constitutes the other end of moment of force, and frame, scale, level, counterweight are centrally installed, in self-balancing state itself, balance two ends of moment of force by moving cursor and weight, centroid position can be calculated using moment of force balance formula.The utility model centroid measurement result is accurate and reliable, and measurement process is convenient.