Abstract: Implementations described herein relate to methods, systems, and computer-readable media to recommend content items. In some implementations, a method includes identifying candidate content items for recommendation to a user and assigning respective ranks to the candidate content items, wherein the respective ranks are personalized to the user. The method further includes selecting, based on the respective ranks, one or more candidate content items from the candidate content items. The method further includes providing the selected one or more candidate content items to a client device for display in a user interface.

Abstract: Disclosed are a self-attention-based speech quality measuring method and system for real-time air traffic control, including following steps: acquiring real-time air traffic control speech data and generating speech information frames; detecting the speech information frames, discarding unvoiced information frames of the speech information frames, generating a voiced long speech information frame; performing mel spectrogram conversion, attention extraction and feature fusion on the long speech information frame to obtain a predicted mos value.

Abstract: An evaluation method and system of an air traffic control (ATC) speech recognition system are provided, the method includes: S1, obtaining, grading and inputting ATC speech data; S2, constructing an evaluation index system; S3, determining weights of utility layer indexes and support layer indexes under different levels ATC speech data; S4, calculating a utility layer score and a support layer score, and adding the scores of the utility layer and the support layer to obtain comprehensive scores of the utility layer and the support layer; S5, determining, weights of the utility layer and the support layer; S6, adding a product of the utility layer weight with the utility layer comprehensive score and a product of the support layer weight with the support layer comprehensive score to obtain a comprehensive score of the speech recognition system; and S7, determining a level of the recognition performance of the speech recognition system.

Abstract: An evaluation method and system of an air traffic control (ATC) speech recognition system are provided, the method includes: S1, obtaining, grading and inputting ATC speech data; S2, constructing an evaluation index system; S3, determining weights of utility layer indexes and support layer indexes under different levels ATC speech data; S4, calculating a utility layer score and a support layer score, and adding the scores of the utility layer and the support layer to obtain comprehensive scores of the utility layer and the support layer; S5, determining, weights of the utility layer and the support layer; S6, adding a product of the utility layer weight with the utility layer comprehensive score and a product of the support layer weight with the support layer comprehensive score to obtain a comprehensive score of the speech recognition system; and S7, determining a level of the recognition performance of the speech recognition system.

Abstract: The disclosure relates to an automatic measuring system and a method thereof for drilling fluid parameters measurement. The system includes i. mud container, configured for test drilling fluid preparation and samples collection; ii. heat jacket, configured to keep the drilling fluid in the tank warm iii. heat exchanger, configured to simulate the practical conditions; iv. plunger pump, configured to pump the test drilling fluid to the flowing test device; v. flow test device, configured to simulate the flowing states of drilling fluid in the borehole annulus and drilling string, and also measure the pressure and flow rate of drilling fluid vi. control module, configured to obtain rheological parameters and the best rheological mode of the drilling fluid in the borehole annulus and drilling string based on the pressure and flow rate.

Abstract: A low sulfur diesel blockage inhibitor as shown in formula (I), a preparation method therefor, and use thereof are provided. In formula (I), x and y are each an integer between 0 and 4; m and n are each selected from H, a C1-C6 linear or branched alkyl group, or a C3-C6 cycloalkyl group. By using a vegetable oil as a raw material, a modified vegetable oil fatty acid is first obtained, and then a polar group of an unsaturated dialdehyde with a certain chain length is introduced into a molecular chain of the modified vegetable oil fatty acid.

Abstract: The present disclosure provides a device and method for diagnosing risk of insufficient hole cleaning problem during drilling wells. The method includes obtaining the measured pressure via several measuring points, and obtaining actually measured value of each measuring point; calculate the theoretical pressure at each measuring points by using the real-time operational data as inputs, evaluating a hole cleaning condition by applying a difference between a theoretical pressure drop and a measured pressure drop to a developed pressure driven hole cleaning model, which gives the risk of insufficient hole cleaning problems and problematic locations. The theoretical pressure drop between two adjacent measurement points along wellbore includes the pressure drop caused by friction effect and hydrostatic effect. However, suspended cuttings in actual drilling fluid may significantly change the pressure drop along wellbore.

Abstract: An estimation and ranking method for carbon emission of individual life, which includes the following steps: collecting and acquiring personal daily life clothing, food, housing, and transportation data; performing fuzzy interval processing on the collected data, and calculating carbon emissions corresponding to each behavior expressed by the fuzzy interval number according to the carbon emission coefficient of each behavior; using fuzzy interval number addition, the carbon emissions corresponding to each individual behavior are added according to different time scales to obtain the fuzzy interval value of the total carbon emissions of the individual on different time scales; use the fuzzy interval number comparison method to obtain the ranking of the carbon emissions of individuals in a specific group on the same time scale. The present invention performs effective size comparison and ranking of personal carbon emissions within a certain group range, and the analysis result is reasonable and accurate.

Abstract: A low sulfur diesel blockage inhibitor as shown in formula (I), a preparation method therefor, and use thereof are provided. In formula (I), x and y are each an integer between 0 and 4; m and n are each selected from H, a C1-C6 linear or branched alkyl group, or a C3-C6 cycloalkyl group. By using a vegetable oil as a raw material, a modified vegetable oil fatty acid is first obtained, and then a polar group of an unsaturated dialdehyde with a certain chain length is introduced into a molecular chain of the modified vegetable oil fatty acid.

Abstract: The invention relates to an automatic measuring system and a use method thereof for drilling fluid parameters measurement under high temperature and high-pressure conditions. The system is composed of six parts: i. mud container, used both for test drilling fluid preparation and the tested samples collection; ii. heat jacket, which is arranged on the outer surface of the fluid tank and used to keep the drilling fluid in the tank warm by heating; iii. heat exchanger, receive the test drilling fluid from the tank and heat it to simulate the practical conditions; iv. plunger pump, which is used to pump the test drilling fluid to the flowing test device; v. moveable test device, used to simulate the flowing states of drilling fluid in the borehole annulus and drilling string, and also measure the pressure and flow rate of drilling fluid in the inlet and outlet of the test device; vi.

Abstract: The invention provides a mud circulation system for reducing swab pressure while tripping out, including drilling tool components, a normal drilling circulation channel and a tripping circulation channel, the drilling tool components include a drill string, a drill bit, and a top drive, the normal drilling circulation channel includes a first rotary valve, a solid phase control device, a mud tank, a mud pump, and a forth rotary valve connected in sequence, the tripping circulation channel includes a second rotary valve, a tripping mud pump, a tripping mud tank and a third rotary valve connected in sequence; the mud circulation system for reducing the swab pressure is operated to: shut down the mud pump, close the first rotary valve, and open the second rotary valve and the third rotary valve before tripping out; determine the pumping flow rate according to relevant parameters.

Abstract: The invention provides a mud circulation system for reducing swab pressure while tripping out, including drilling tool components, a normal drilling circulation channel and a tripping circulation channel, the drilling tool components include a drill string, a drill bit, and a top drive, the normal drilling circulation channel includes a first rotary valve, a solid phase control device, a mud tank, a mud pump, and a forth rotary valve connected in sequence, the tripping circulation channel includes a second rotary valve, a tripping mud pump, a tripping mud tank and a third rotary valve connected in sequence; the method to operate the mud circulation system for reducing the swab pressure is as follows: shutting down the mud pump, closing the first rotary valve, and opening the second rotary valve and the third rotary valve before tripping out; determining the pumping flow rate according to relevant parameters.