Abstract: The present invention relates to a pharmaceutical composition comprising a ?-lactam compound of formula (I), or a stereoisomer, a solvate or a pharmaceutically acceptable salt or ester thereof, and a lactamase inhibitor or an efflux pump inhibitor, and the use thereof for inhibiting microorganisms, particularly bacteria, especially Gram-negative bacteria, wherein each symbol in formula (I) is as defined in the description.

Abstract: A semiconductor device capable of reducing power consumption is provided. A group controller detects a zero weight parameter having a zero value among “n×m” weight parameters to be transferred to a weight parameter buffer. Then, when receiving the zero weight parameter as its input, the group controller exchanges the “n×m” weight parameters to be transferred to the weight parameter buffer so that all multiplication results of the “n” multipliers included in a target multiplier group that is one of the “m” multiplier groups are zero. The group controller controls the target multiplier group to be disabled, and exchanges the “n×m” pixel data to be transferred to the data input buffer, based on the exchange of the “n×m” weight parameters.

Abstract: A system that enables searching for representing listings for accommodation reservations on a map is described. The system receives, by a network site of a listing network platform, input comprising search criteria associated with a geographical region and identifies a plurality of listings matching the search criteria. The system identifies a first subset listings of the plurality of listings that is each associated with a respective location that is within a boundary associated with the geographical region and a second subset listings of the plurality of listings that is each associated with a respective location that is outside the boundary associated with the geographical region. The system visually distinguishes the first subset of listings from the second subset of listings on a map-based graphical user interface (GUI) that represents the plurality of listings matching the search criteria.

Abstract: An earphone, including: a housing, a first speaker unit, a second speaker unit. The housing has a sound output hole. The first speaker unit and the second speaker unit are separately independently fastened in the housing. The first speaker unit produces a sound toward the sound output hole. The second speaker unit is located on a side that is of the first speaker unit and that is away from the sound output hole and is spaced apart from the first speaker unit. A sound production frequency of the second speaker unit is smaller than a sound production frequency of the first speaker unit. A cavity is enclosed by the first speaker unit, the second speaker unit, and an inner wall of the housing, the cavity serves as a front cavity of the second speaker unit, and the front cavity communicates with the sound output hole through a sound output channel.

Abstract: A greenhouse solar power generation system comprises a south facing greenhouse structure, a north facing wall as an active hybrid photovoltaic and solar thermal panel based electricity and heat cogeneration and storage system, a group of vacuum tube based steam generators, a hydrogen generation storage and power generation system, and thermal power generation system. A hybrid photovoltaic and solar thermal panel array attached to the north facing wall cogenerates electricity and thermal energy. The cogenerated thermal energy is raised in temperature by the vacuum tube based steam generators for thermal power generation; and the cogenerated electricity is used to generate hydrogen. The greenhouse solar power generation system generates hydrogen and agriculture products simultaneously.

Abstract: This application relates to the field of terminals, and provides a camera switching method and an electronic device. The method is applicable to an electronic device. The electronic device includes a camera module. The camera module includes a first camera and a second camera. The method includes: enabling a camera application; displaying a first image, where the first image is captured when the first camera serves as a main camera for image capturing; determining that a first parameter and a second parameter satisfy a first preset condition, where the first parameter indicates distance information between the electronic device and a target object, the first parameter is a parameter from the camera module, and the second parameter indicates a zoom ratio of the electronic device; and displaying a second image, where the second image is captured when the second camera serves as the main camera for image capturing.

Abstract: A shooting method is provided. By implementing the shooting method provided in embodiments of this application, a terminal electronic device such as a smartphone or a smart television can determine to change a shooting mode based on a recognized user gesture. The electronic device can recognize a user's waving or sliding gesture more accurately based on the user's hand position change track in an image frame sequence and whether there are hand movements in two directions in the position changes.

Abstract: A simulation method for dynamic contact characteristics of a high-speed heavy-load ball bearing in a liquid rocket engine, mainly including: establishing a low-speed heavy-load ball bearing model of a liquid rocket engine according to a normal contact stress of a ball bearing, and performing iterative computation on the low-speed heavy-load ball bearing model of the liquid rocket engine to obtain static contact characteristics of the heavy-load ball bearing; establishing a high-speed heavy-load ball bearing model of the liquid rocket engine based on a theory of quasi-static analysis; and taking computed values for the static contact characteristics of the heavy-load ball bearing as initial values, substituting the initial values into the high-speed heavy-load ball bearing model, and performing iterative operation through a dual-population co-evolutionary particle swarm optimization (CPSO) algorithm to obtain dynamic contact characteristics of each of balls in the ball bearing.

Abstract: This application provides a water conservancy project operation trend prediction method. The method includes: acquiring to-be-processed initial monitoring data, and determining a first type of monitoring data and a second type of monitoring data according to the initial monitoring data; determining a target nonlinear fitting model from a preset nonlinear fitting model set according to the second type of monitoring data; and predicting the state of a target water conservancy project by a new model constructed by combining the target nonlinear fitting model with the models in the preset prediction model set.

Abstract: This application relates to the field of image processing, and provides a point light source image detection method and an electronic device. The method includes: obtaining to-be-tested images, and determining pixel brightnesses of the to-be-tested images; determining low-brightness pixels and high-brightness pixels in the images based on the pixel brightnesses; filtering, based on the low-brightness pixels, out an image that does not meet a preset dark environment requirement, and filtering, based on the high-brightness pixels, out an image that does not meet a preset point light source size; and determining, based on a result of the filtering, whether a to-be-tested image is a point light source image. Pixels in images are classified into low-brightness pixels and high-brightness pixels. For the low-brightness pixels, the images are screened based on a preset dark environment requirement, so that the selected point light source images meet the preset dark environment requirement.

Abstract: An inflatable non-imaging solar concentrator powered high temperature thermo-chemical reaction system, which is designed to reduce CO2 into CO and H2O into H2 for liquid fuels such as methanol and kerosene, comprises: 1) an inflatable non-imaging solar concentrator with a transparent cover and a Compound Parabolic Concentrator (CPC); 2) the first stage of the multi-stage non-imaging non-tracking solar concentrator with a domed divergent Fresnel Lens transparent cover and a CPC; 3) the second stage of the multi-stage non-imaging non-tracking solar concentrator with a domed divergent Fresnel Lens transparent cover and a CPC; 4) a high temperature thermo-chemical reactor with a steel high pressure vessel, an insulation layer, a first CeO2 catalyst layer, and a second CeO2 catalyst layer.

Abstract: This application provides a method for determining a recommended scenario and an electronic device. The method includes: determining a recommended scenario of a current image based on a moving distance of a camera on an electronic device and a relationship between a current image and a previous image. When a slight shake occurs on the electronic device or the camera on the electronic device, or a photographed object/scenario does not change violently, continuity of a recommended scenario is preferably ensured, a probability of a jump of the recommended scenario is reduced, and user experience during image shooting is greatly improved.

Abstract: A hybrid plug-in battery and hydrogen fuel internal combustion engine vehicle with swappable modular hydrogen tanks and integrated with solar power generation system comprises: a plug-in chargeable battery bank; a hydrogen fuel internal combustion engine; a water electrolysis system; a solar electric power generation system; and multiple modular swappable hydrogen tanks. The hybrid electric vehicle can be electrically charged by using electric charging infrastructure and mechanically charged by swapping hydrogen tanks. The introduction of the water electrolysis system into the new structure of the hybrid vehicle enables onboard hydrogen generation. The swappable hydrogen tanks comprise sensors and wireless communication electronic terminals to be shared by all vehicles.

Abstract: A photographing method is disclosed. By implementing the method, an electronic device 100, for example, a mobile phone, may determine bone points of a hand of a user in an image by using a bone point recognition algorithm, and determine two gesture feature points from the bone points. Then the electronic device 100 may construct, by using positions of the two gesture feature points on a horizontal coordinate axis, a gesture vector representing a state of the hand (a palm or the back of the hand). Further, the electronic device 100 may determine a gesture vector of a subsequent image frame by using the same method. When recognizing that a direction of the gesture vector in the subsequent image frame is opposite to a direction of a gesture vector in an initial image frame, the electronic device 100 may determine that the user has made a hand flip gesture.

Abstract: This application relates to the field of image processing, and provides a point light source image detection method and an electronic device. The method includes: obtaining to-be-tested images, and determining pixel brightnesses of the to-be-tested images; determining low-brightness pixels and high-brightness pixels in the images based on the pixel brightnesses; filtering, based on the low-brightness pixels, out an image that does not meet a preset dark environment requirement, and filtering, based on the high-brightness pixels, out an image that does not meet a preset point light source size; and determining, based on a result of the filtering, whether a to-be-tested image is a point light source image. Pixels in images are classified into low-brightness pixels and high-brightness pixels. For the low-brightness pixels, the images are screened based on a preset dark environment requirement, so that the selected point light source images meet the preset dark environment requirement.

Abstract: A non-tracking non-imaging solar concentrator system, which is able to concentrate both beam light and diffuse light with high concentration ratio, comprises a Compound Parabolic Concentrator (CPC) and a domed divergent Fresnel lens. The system is configured by mounting the domed divergent Fresnel lens on the top of CPC, or making a chamber with its bottom thin transparent wall shaped into CPC and its top thin transparent wall shaped into domed divergent Fresnel lens to form a bulb-like close structure solar concentrator. Wherein, the non-image CPC with small acceptance half-angle is used to concentrate both beam light and diffuse light with high concentration ratio, and the domed divergent Fresnel lens is used to refract the incident light to enlarge the acceptance angle of CPC, and therefore to realize stationary concentration. The bulb-like close structure concentrators are stacked together to realize arbitrary high concentration ratio of solar concentrator.

Abstract: A mixed electron-proton conductor gas diffusion electrode based hybrid CO2 electrochemical reducer and hydrogen fuel cell system reduces CO2 into CO while generating electric power by consuming hydrogen and oxygen generated from renewable energy powered water electrolysis system. The hybrid CO2 electrochemical reducer and hydrogen fuel cell system includes a gas diffusion electrode made of mixed electron-proton conductors such as modified single-wall carbon nano-tubes working at room temperature to pass electrons and protons generated from hydrogen and CO2 to facilitate CO2 reduction.

Abstract: A combined electrochemical CO2 reduction and a fuel cell system cogenerates CO from CO2 and electric power through a hybrid CO2 reducer and a Hydroxide Exchange Membrane Fuel Cell (HEMFC) system driven by hydrogen and oxygen generated from renewable energy. In the structure of the hybrid system, a CO2 cell chamber compartment and a hydrogen cell chamber compartment are incorporated into a HEMFC, wherein CO2 is reduced into CO by protons generated in the electric power generation process of fuel cell.

Abstract: A method for increasing the yield of eicosapentaenoic acid in Schizochytrium sp., the method comprising: inoculating Schizochytrium sp. ATCC 20888 into a fermentation culture medium, fermenting same under an aerobic condition, changing the temperature when fermenting is performed to the middle of a logarithmic phase, continuing fermenting same, and controlling the dissolved oxygen (DO) value to be 2%-10% after changing the temperature, wherein changing the temperature increases the initial fermentation temperature to 32° C.-37° C. from 25° C.-30° C. EPA is produced by means of fermenting with Schizochytrium sp. ATCC 20888, the dry weight of thalli in the obtained fermentation liquor reaches 66.15 g/L, the yield of oil is 9.97 g/L, and EPA accounts for 13.33% of fatty acid.

Abstract: A Recreational Vehicle (RV) trailer as a mobile Electric Vehicle (EV) charging station powered by an inflatable non-imaging non-tracking solar concentrator based Concentrating Solar Power (CSP) system comprises an expandable compartment with drawer type sub-compartments, foldable hybrid solar thermal and photovoltaic panel arrays, heat pumps, thermal storage, thermal power generation system, large battery banks, and bidirectional chargers. When parked, the hybrid solar thermal and photovoltaic arrays are extended as receivers, and the inflatable non-imaging non-tracking solar concentrators are blew ups to form CSP system to cogenerate electricity and heat. The cogenerated electricity is used to charge battery banks directly, and the cogenerated heat is pumped to high temperature and stored for regeneration of power during night time. The RV trailer serves as mobile EV charging station, hotel, and solar power generation station.