Abstract: Disclosed in the present application is a method for fitting spontaneous emission noise of a lidar system or an optical fiber sensing system. The method includes: providing a trigger collection signal by a signal source; triggering, based on the trigger collection signal, a co-located transceiver module and a distributed transceiver module to perform synchronous detection on a detection target; receiving co-located data and distributed data returned by the detection target; subtracting local noise from the co-located data and the distributed data, respectively; selecting a linear interval to normalize the co-located data; performing subtraction operation on the normalized co-located data and the distributed data to obtain spontaneous emission noise; and fitting the spontaneous emission noise by a function.

Abstract: The present disclosure relates to a main control circuit board and an earphone. The main control circuit board comprises a substrate, metal wires, and a load. The metal wires include a power source wire and a loop wire that are configured to connect the load to an external power source, the power source wire and the loop wire are arranged side by side, and a current direction of the power source wire is opposite to a current direction of the loop wire. A ratio of an absolute value of a difference between a width of the power source wire or the loop wire and an average width to the average width is less than or equal to 20%, the average width being defined as an average value of widths of the power source wire and the loop wire.

Abstract: A method and apparatus for protecting data, and a device and a medium are provided. The method comprises acquiring, by a first device, a feature representation generated by a second device on the basis of sample data and according to a second model, wherein the first device has label information for the sample data; and the first device and the second device are used for jointly training a first model at the first device and the second model at the second device. The method further comprises generating, by the first device, a prediction label for the sample data on the basis of the feature representation and according to the first model. The method further comprises determining, by the first device and on the basis of the feature representation, the label information and the predicted label, a total loss value used for training the first model and the second model.

Abstract: The present disclosure discloses an earphone. The earphone may include a hook-shaped component, a connecting component, and a holding component. When the earphone is in a wearing state, the hook-shaped component may be configured to hang between a rear side of an ear of a user and a head of the user. The holding component may be configured to contact a front side of the ear. The connecting component may be configured to connect the hook-shaped component and the holding component and extend from the head to an outside of the head to cooperate with the hook-shaped component to provide the holding component with a pressing force on the front side of the ear.

Abstract: Some embodiments provide an irrigation flow sensor system, comprising: a housing forming a fluid channel to cooperate with conduits of an irrigation system; a paddle wheel device with at least a first blade of a set of the blades comprises a magnetic element; the paddle wheel device is positioned with at least a portion of the blades extends into the fluid channel as the blades rotate about an axis; a magnetic sensor proximate a pathway of the magnetic element as it rotates configured to provide a sensor output every time the magnetic element passes the magnetic sensor; a switch coupled to the magnetic sensor and a current loop, wherein the switch in an activate state is configured to temporarily change the current in the current loop in response to the sensor output, with a rate of change in current corresponding to a flow rate of the fluid flowing.

Abstract: Methods and systems for processing a graphic for light-cured printing, an electronic apparatus, and/or a storage medium are disclosed. In some embodiments, the method includes following steps: obtaining 3D model data of an object to be printed; slicing the 3D model data to obtain sliced data; converting the sliced data to a projected picture; and chunking the projected picture to obtain a plurality of exposed pictures. The plurality of exposed pictures are superimposed and intersected to have an exposed result of the projected picture. In other embodiments, the method includes following steps: placing a photosensitive resin in a material tray, placing a molding platform in the material tray, and placing a molding end surface of the molding platform in contact with the photosensitive resin; sending the plurality of exposed pictures to a bottom surface of the material tray; and curing a corresponding layer of photosensitive resin.

Abstract: The present disclosure mainly relates to an earphone, comprising a core module and a hook structure. The core module is disposed on a front side of an ear in a wearing state. At least a portion of the hook structure is disposed at a rear side of the ear in the wearing state. The core module includes a core housing and a loudspeaker. The hook structure includes an adapter housing connected with the core housing. At least a portion of the adapter housing is disposed at the front side of the ear in the wearing state. The adapter housing forms an accommodation cavity and one or more through holes communicated with the accommodation cavity. The earphone includes one or more electrode terminals at least partially disposed in the one or more through holes.

Abstract: A battery cell, a battery, and an electric apparatus are described. A sampling module is connected to a housing and electrically connected to a conductor. At least one conductor is disposed on the housing and electrically connected to an electrode terminal. When status signals from the battery cell are collected, signals from at least one collection point of the sampling module are directly transmitted by the electrode terminal. In this way, the sampling module is integrated on the end cover and at least one conductor is electrically connected to the electrode terminal, which changes the conventional method of transmitting signals to CMC through a flexible circuit board and wiring harness, avoids the transmission of status signals from being affected by factors such as interference coupling and wiring harness short-circuiting, shortens the signal transmission path, and improves the reliability of signal collection by the sampling module.

Abstract: The present disclosure provides a method for obtaining a recommended explanation, a device, and a computer readable medium. The method includes: generating a recommended item by a recommendation model; calculating a similarity between a plurality of explanatory items and the recommended item; obtaining a predetermined number of explanatory items from the plurality of explanatory items, as a recommended explanation of the recommended item, wherein a similarity between the predetermined number of explanatory items and the recommended item is greater than a similarity between other explanatory items and the recommended item; and outputting identification information of the predetermined number of explanatory items.

Abstract: A single-photon Raman optical frequency comb source is provided, including: a light source assembly, a filtering mechanism, at least three electro-optical modulators, a wavelength division multiplexer and a single photon generating mechanism. The light source assembly is configured to generate a Raman scattering light. The filtering mechanism is configured to pass a light having a specific wavelength, to filter the Raman scattering light and obtain at least three Raman scattering spectral lines. Each electro-optical modulator is configured to modulate a frequency of one of the Raman scattering spectrum lines in one-to-one correspondence, so as to cause a frequency shift of the Raman scattering spectrum line. The wavelength division multiplexer is configured to multiplex all modulated Raman scattering spectral lines and output a Raman optical frequency comb. The single photon generating mechanism is configured to adjust the Raman optical frequency comb to obtain a single-photon Raman optical frequency comb.

Abstract: According to embodiments of the present disclosure, there are provided a method, device, medium, and product for state prediction. The method includes: obtaining a neural network, the neural network being trained to determine a state change of a physical system over time, training data of the neural network indicating states of a plurality of physical systems at a plurality of times; obtaining state data corresponding to a state of a target physical system at a first time; determining respective unit feature representations of the physical units in the target physical system based at least on target values of material properties of the physical units; and determining a state of the target physical system at a second time based on the state data by inputting at least the unit feature representations to the neural network. Through the above solution, generalization capability of the neural network can be significantly improved.

Abstract: The disclosure relates to a method, an apparatus, a storage medium, an electronic device, a computer program product, and a computer program for feature extraction, device. The method includes: determining target data for a feature to be extracted, and determining, based on the target data, a plurality of query vectors, a plurality of key vectors, and a plurality of value vectors; determining a plurality of key-value pair information corresponding to each of the query vectors; and performing, for each of the query vectors, a random mapping based on the query vector and the plurality of data samples, to obtain a plurality of random query vectors, and determining feature information corresponding to the query vector based on the plurality of random query vectors and the plurality of key-value pair information.

Abstract: According to implementations of the present disclosure, a method, apparatus, device and medium for managing molecular prediction is provided. In the method, an upstream model is obtained from a portion of network layers in a pretrained model, the pretrained model describing an association between a molecular structure and molecular energy. A downstream model is determined based on a molecular prediction purpose, and an output layer of the downstream model is determined based on the molecular prediction purpose. A molecular prediction model is generated based on the upstream model and the downstream model, the molecular prediction model describing an association between a molecular structure and a molecular prediction purpose associated with the molecular structure. Since the upstream model may have extensive knowledge related to molecules, the amount of training data required to train the molecular prediction model that is generated based on the upstream model and the downstream model may be reduced.

Abstract: An active human milk oligosaccharide (HMO) preparation with an allergy-alleviating function is provided. The active HMO preparation includes one or more of lacto-N-fucopentaose I (LNFP-I) and 2?-fucosyllactose (2?-FL). A part of these two HMOs ingested by a human body can enter a circulatory system to regulate the immune cell populations and the cytokine secretion, so as to directly affect an immune system of the human body and well alleviate the allergies in some infants and young children. In addition, for infants and young children who have a human milk without 2?-FL and LNFP-I, the active HMO preparation can supplement the nutrients of the human milk.

Abstract: An electronic device and a method of forming the same are disclosed. An emitter resonator and a reception cap cavity are formed on and in a first wafer, and an emitter cap cavity and a reception resonator are formed in and on a second wafer. After bonding together the first and second wafers, an emitter filter is formed in an emission region, and a reception filter is formed in a receiving region. The method provided in the present invention not only can simplify the fabrication process of the device and improve its accuracy and stability, but also facilitates integration of the emitter and receives filters in a same chip, which results in a higher degree of integration of the device and a more compact package size thereof.

Abstract: An ultrathin glass-ceramic article is provided having an article thickness (t) of equal to or less than 0.3 mm and an outer surface followed towards the inside of the article by an outer layer and a central part. The glass-ceramic has a crystal phase and an amorphous phase and the outer layer includes the crystal phase. The article has a gradient structure or a layered structure.

Abstract: Disclosed is a method for monitoring the influence of defects in a few-layer two-dimensional material on exciton transport. The method includes: measuring an original few-layer two-dimensional material sample to obtain a first transient absorption dynamic curve; fitting the first transient absorption dynamic curve to obtain a first exciton lifetime; acquiring first TAM images of exciton densities at different delay times; fitting the first TAM images to determine a first diffusion coefficient and a first diffusion distance; performing plasma treatment on the original few-layer two-dimensional material sample for different durations, and obtaining a second transient absorption dynamic curve; fitting the second transient absorption dynamic curve to obtain a second exciton; acquiring and fitting second TAM images of exciton densities at different delay times to determine a second diffusion coefficient and a second diffusion distance; and monitoring the influence of defects on exciton transport.

Abstract: The present disclosure discloses an earphone. The earphone may include a hook-shaped component, a connecting component, and a holding component. When the earphone is in a wearing state, the hook-shaped component may be configured to hang between a rear side of an ear of a user and a head of the user. The holding component may be configured to contact a front side of the ear. The connecting component may be configured to connect the hook-shaped component and the holding component and extend from the head to an outside of the head to cooperate with the hook-shaped component to provide the holding component with a pressing force on the front side of the ear.

Abstract: The panoramic surround view system in the vehicle can control the projection device of the vehicle to project the preset pattern on the ground around the vehicle, acquire the plurality of target photographs including the preset pattern, and generate the target calibrating data of the surround view cameras according to the plurality of target photographs, so that the surround view cameras of the panoramic surround view system can be calibrated by using the target calibrating data to obtain the panoramic surround view image. Therefore, when the user needs to re-calibrate the calibrating data of the image splicing of the panoramic surround view system of the vehicle, the calibrating process can be completed by only by using the projection device of the vehicle, without using a special calibrating site and equipment, thus simplifying the calibrating operation steps and saving time.

Abstract: A single-photon Raman optical frequency comb source is provided, including: a light source assembly, a filtering mechanism, at least three electro-optical modulators, a wavelength division multiplexer and a single photon generating mechanism. The light source assembly is configured to generate a Raman scattering light. The filtering mechanism is configured to pass a light having a specific wavelength, to filter the Raman scattering light and obtain at least three Raman scattering spectral lines. Each electro-optical modulator is configured to modulate a frequency of one of the Raman scattering spectrum lines in one-to-one correspondence, so as to cause a frequency shift of the Raman scattering spectrum line. The wavelength division multiplexer is configured to multiplex all modulated Raman scattering spectral lines and output a Raman optical frequency comb. The single photon generating mechanism is configured to adjust the Raman optical frequency comb to obtain a single-photon Raman optical frequency comb.