Abstract: Systems and methods for providing voice feedback for video conferences are provided. A computer-implemented method includes joining, by a client device, a video conference hosted by a video conference provider, the video conference having a plurality of participants using a plurality of client devices. With voice feedback enabled, the client device may receive a first audio stream from the video conference provider, the first audio stream associated with a first participant of the plurality of participants and a second audio stream from a user of the client device, the second audio stream comprising a voice of the user of the client device. The client device can play the first audio stream on one or more channels of one or more audio devices connected to the client device and play the second audio stream on the one or more channels of the one or more audio devices.

Abstract: One example method for ad hoc client audio device support for virtual conferences includes transmitting, via a first communication channel by a virtual conference device connected to a virtual conference hosted by a virtual conference provider, a first signal, the first signal including connection information to enable a network connection between a remote client device and the virtual conference device; receiving, by the virtual conference device via a second communication channel, a request to connect from the remote client device; connecting to the remote client device using the second communication channel; receiving, via the connection to the remote client device, an audio stream from the remote client device, the audio stream captured by a microphone of the remote client device; and providing the audio stream to the virtual conference.

Abstract: An air conditioning system includes a first system and a second system. The first system includes a compressor, a first heat exchanger, a second heat exchanger, an electronic control assembly, and a first throttle. The second system includes a first heat exchange assembly and a heat exchange member. The first heat exchange assembly includes a first channel and a second channel isolated from each other. A second communication port of the first channel is in communication with a second opening of the compressor or a second opening of the second heat exchanger. A first communication port of the heat exchange member is in communication with a first communication port of the second channel. A second communication port of the heat exchange member is in communication with a second communication port of the second channel. The heat exchange member includes a heat dissipation surface in contact with the electronic control assembly.

Abstract: A flat tube, a multi-channel heat exchanger, and an air conditioning and refrigeration system. The flat tube has n groups of flow channels extending in a length direction of the flat tube, and the n groups of flow channels are distributed to be spaced apart in a width direction of the flat tube; and a flow cross-sectional area of a first group of the flow channels is A1, . . . , a flow cross-sectional area of kth group of the flow channels is Ak, . . . , a flow cross-sectional area of an nth group of the flow channels is An, 1<k?n, Ak?1.2Ak-1, and k is an integer greater than 1.

Abstract: An image decoding method, a decoder and a storage medium are provided. The method includes: receiving code stream data, and parsing the code stream data to obtain a coding tree unit corresponding to the code stream data; parsing an i-th node of i-th layer corresponding to the coding tree unit to obtain i-th state parameter and i-th flag parameter corresponding to the i-th node; performing detection processing on the i-th node according to the i-th state parameter and the i-th flag parameter to obtain an i-th detection result; acquiring a (i+1)th node of a (i+1)th layer corresponding to the coding tree unit; continuing to perform detection processing on the (i+1)th node, and traversing all the nodes corresponding to the coding tree unit until all the coding unit data corresponding to the coding tree unit is obtained; and generating a decoded image corresponding to the code stream data.

Abstract: A semiconductor device includes a gate structure, a first epitaxial layer, a second epitaxial layer and a cap layer. The gate structure is disposed on a substrate. The first epitaxial layer is disposed in the substrate and at two sides of the gate structure. The second epitaxial layer is disposed on the first epitaxial layer, in which an included angle between a surface of the second epitaxial layer and a horizontal direction is 15 degrees to 35 degrees. The cap layer is disposed on the second epitaxial layer.

Abstract: A processing method for a heat exchanger includes: operation S100, preparing a heat exchange module, wherein the heat exchange module includes a plurality of flat tubes; operation S200, placing at least part of the heat exchange module on a first platform; operation S300, limiting the heat exchange module in a width direction of the first platform; operation S400, limiting the heat exchange module in a length direction of the first platform; operation S500, preparing a fin module; operation S600 or operation S700, using a pushing piece to push the heat exchange module to move the plurality of flat tubes by a preset distance along the width or length direction of the first platform; and operation S800, repeating operations S500 and S600, or repeating operations S500 and S700, until installation of N fin modules and one heat exchange module is completed, wherein N is greater than or equal to 2.

Abstract: A multi-stage flame acceleration device and method for a gas-fuel engine are provided. The device includes a pressing piece, an upper chamber, a spark plug, a fuel ejector, a cooling device, and a flame acceleration nozzle. The spark plug and the fuel ejector are mounted in the upper chamber. The pressing piece is sleeved on an upper part of the upper chamber, and the device is wholly and fixedly connected to a cylinder head through a step groove of the upper chamber. A nozzle sealing ring, the flame acceleration nozzle, and a cylinder head sealing ring are mounted at a bottom of the upper chamber from top to bottom in sequence. Annular obstacles formed by annular plates are arranged in a chamber of the flame acceleration nozzle. In the method, a fuel is ejected in the chamber of the flame acceleration nozzle to obtain a homogeneous gas mixture.

Abstract: An application-level memory control group of a first application may be created when the first application is opened. An anonymous page of the first application is added to a least recently used linked list of the application-level memory control group, and a file page of the first application is added to a global least recently used linked list. An application-level memory control group is created in a dimension of an application, and an anonymous page of the application is managed in a refined manner. In addition, a file page of the application-level memory control group may be managed based on a global least recently used linked list.

Abstract: Oral care compositions having antioxidant efficacy are disclosed. The oral care composition may include an orally acceptable vehicle and one or more phenolic compounds. The phenolic compounds may be capable of or configured to provide or improve antioxidant efficacy of the oral care composition. Methods for preparing the oral care compositions, methods for treating, preventing, or inhibiting one or more conditions of an oral cavity resulting from oxidative damage, and methods for scavenging one or more free radicals in an oral cavity are also disclosed.

Abstract: An image decoding method, a decoder and a storage medium are provided. The method includes: receiving code stream data, and parsing the code stream data to obtain a coding tree unit corresponding to the code stream data; parsing an i-th node of i-th layer corresponding to the coding tree unit to obtain i-th state parameter and i-th flag parameter corresponding to the i-th node; performing detection processing on the i-th node according to the i-th state parameter and the i-th flag parameter to obtain an i-th detection result; acquiring a (i+1)th node of a (i+1)th layer corresponding to the coding tree unit; continuing to perform detection processing on the (i+1)th node, and traversing all the nodes corresponding to the coding tree unit until all the coding unit data corresponding to the coding tree unit is obtained; and generating a decoded image corresponding to the code stream data.

Abstract: A heat exchanger includes a first pipe, a second pipe, a plurality of heat exchange tubes, an inlet/outlet pipe, and a first member. The first pipe has a main channel, and the heat exchange tube is connected between the first pipe and the second pipe. The heat exchange tube includes a plurality of channels disposed to be spaced apart. The plurality of channels include a first channel with a largest flow cross-sectional area and a second channel with a smallest flow cross-sectional area. The first member is located in the main channel of the first pipe to define a first flow channel and a second flow channel. The first flow channel is connected to the inlet/outlet pipe, and the second flow channel is connected to the heat exchange tube. The first member includes through-holes.

Abstract: The present disclosure discloses a microwave power distribution network (10) and method based on phase-frequency hybrid control, an electronic device, and a storage medium. The microwave power distribution network (10) includes a first-stage microwave combining and distribution subnetwork (100) based on phase control and a second-stage microwave distribution subnetwork (200) based on frequency control. The microwave power distribution network (10) is a passive device and does not require additional signals to change its state or mechanical structure. High-power microwaves generated by power sources with a certain relationship between phases and frequencies are distributed to corresponding output ports after entering the microwave distribution network (10), thereby meeting the needs of fast switching of multi-angle irradiation fields in technologies such as FLASH radiotherapy and stationary CT.

Abstract: A cryogenic propellant rocket engine, a flowmeter calibration system and method for the cryogenic propellant rocket engine have been provided. The flowmeter calibration system for the cryogenic propellant rocket engine includes a container filling unit, a container, a supply pipeline, a weighing unit, a quick recovery container, a weighing and filling recovery unit and a recovery unit which are sequentially connected; the container filling unit is configured to connect a tank wagon with the container; and the supply pipeline includes a temperature sensor and a pressure sensor, as well as a first isolation valve, a reference flowmeter, a calibration flow adjusting manual valve, a vertical main pipe and N circumferentially and uniformly distributed horizontal pipes which are sequentially connected by a pipeline.

Abstract: A control method and system for refrigeration, oil return and noise reduction of a multi-split air-conditioner, wherein the method includes: when the accumulative time that the frequency of a compressor is smaller than the set frequency threshold reaches the oil return cycle and a standby indoor unit exists, conducting an oil return running mode; resetting the accumulative time; starting counting the oil return running time; calculating the indoor unit starting load; determining the opening degree of an expansion valve of the standby indoor unit according to the indoor unit starting load and whether there is anyone in a room where the standby indoor unit is located; controlling the compressor to run according to the set oil return frequency; and when the oil return running time reaches the oil return set time, exiting the oil return running mode, and conducting a normal refrigerating running mode.

Abstract: Techniques for adaptive audio processing during video conferencing are provided. In an example method, a client device joins a video conference hosted by a video conference provider, the video conference including a plurality of client devices. The client device receives, from an audio input device, an audio stream. The client device then processes, using an audio processing component, the audio stream. The client device determines, using a trained machine learning model, one or more characteristics of the audio stream. The client device then determines, based on the one or more characteristics of the audio stream, an audio configuration operation comprising one or more instructions. The client device executes the audio configuration operation. The client device then outputs the audio stream to the video conference provider.

Abstract: A heat exchanger, includes: a first assembly including a first tube and a third tube; a second assembly including a second tube and a fourth tube; a plurality of heat exchange tubes, the heat exchange tube including a first heat exchange tube communicating the first tube with the third tube and a second heat exchange tube communicating the second tube with the fourth tube; and a fin, wherein part of the fin is connected with one first heat exchange tube, and the other part of the fin is connected with one second heat exchange tube. A first hydraulic diameter of the first tube is D1, a second hydraulic diameter of the second tube is D2, and 1<D1/D2?6; and/or, a width of the first heat exchange tube is Tw1, a width of the second heat exchange tube is Tw2, and 1<Tw1/Tw2?5.

Abstract: Provided are a scattering film and an electronic device with the scattering film. The scattering film includes: a carrier layer configured to emit microwave signals and/or receive microwave signals and a first protruding structure arranged on the surface of the carrier layer; and when passing through the first protruding structure, microwaves are reflected. According to the solution, a first protruding structure is provided, and microwaves can be reflected when passing through the first protruding structure, so that the transmitting and/or receiving space range for the microwaves which are originally only directionally transmitted is enlarged, and the coverage range of microwave signals is increased.

Abstract: A flat tube included in a heat exchanger has a first end and a second end spaced apart in a length direction of the flat tube, and a first side surface and a second side surface spaced apart in a width direction of the flat tube. The first side surface and the second side surface of the first end are provided with a first concave part and a second concave part, respectively. The first concave part and the second concave part have a first length and a second length that extend from an end surface of the first end in the length direction of the flat tube, and have a first depth and a second depth that extend in the width direction of the flat tube. The first length is not equal to the second length.

Abstract: A method (100) and apparatus (800) for variable speed osteotomy.