Abstract: The present invention relates to a multi-layer lithium metal battery negative electrode, and a preparation method and preparation device therefor. The multi-layer lithium metal battery negative electrode comprises a current collector, a lithium metal layer, a fast ion conductor layer and a functional protection layer. The present invention also relates to a method for preparing the multi-layer lithium metal battery negative electrode, the method characterized by comprising the following steps: (1) a step of evaporating a lithium metal; (2) a step of evaporating a fast ion conductor; and (3) a step of coating a protective material and a polymer solid electrolyte. In addition, the present invention relates to a device for preparing the multi-layer lithium metal battery negative electrode.

Abstract: An acoustic device includes a first sound producing component and a back cavity structure. The first sound producing component has a first front side and a first back side, wherein the first sound producing component is a high frequency sound unit, and the first front side faces a sound propagating opening of the acoustic device. The back cavity structure is connected to the first back side of the first sound producing component. The first sound producing component produces a first acoustic wave from the first front side towards the sound propagating opening, and the first sound producing component produces a second acoustic wave from the first back side towards a back cavity of the back cavity structure. The back cavity structure is configured to flatten a peak or a dip of a frequency response of the first sound producing component.

Abstract: An acoustic device includes a first sound producing component and a back cavity structure. The first sound producing component has a first front side and a first back side, wherein the first sound producing component is a high frequency sound unit, and the first front side faces a sound propagating opening of the acoustic device. The back cavity structure is connected to the first back side of the first sound producing component. The first sound producing component produces a first acoustic wave from the first front side towards the sound propagating opening, and the first sound producing component produces a second acoustic wave from the first back side towards a back cavity of the back cavity structure. The back cavity structure is configured to flatten a peak or a dip of a frequency response of the first sound producing component.

Abstract: A database system that, after receiving the query request, adopts a pre-trained deep learning model to predict probing cardinality corresponding to the query request based on the query vector in the query request, the number of vectors of the query result, and the vector corresponding to the distances between the query vector and the center vector of a plurality of data partitions stored in the storage device. The system then determines the target data partitions according to the probing cardinality, and obtains the query result from the target data partitions. Since the probing cardinality is dynamically determined based on the query request, decreases to both the query efficiency due to a larger setting of the probing cardinality, and the query recall due to a smaller setting of the probing cardinality are avoided, which is beneficial in reducing the average number of target data partitions and improving query efficiency.

Abstract: Various schemes pertaining to generating an output image using hybrid motion-compensated fusion techniques are described. An apparatus receives multi-frame data comprising a plurality of images consecutively captured. The apparatus subsequently generates a first intermediate image and a second intermediate image by performing temporal fusion on a first part and a second part of the multi-frame data, respectively. The apparatus further generates the output image using motion-compensated fusion based on the first and second intermediate images. The apparatus provides benefits of efficiently reducing noise and blurriness in the output image.

Abstract: A true random number generator is provided. The true random number generator includes an Exclusive-Or (XOR) circuit and multiple random entropy source circuits. One entropy source sampling process is performed at an output terminal of each of at least two inverters in each of the multiple random entropy source circuits, which is performed by a flip-flop corresponding to the inverter. Sampling results are inputted to an XOR unit in the random entropy source circuit and XOR processing is performed on the sampling results. XOR processing results outputted by the multiple of random entropy source circuits are inputted to the XOR circuit, and the XOR processing is performed on the XOR processing results to obtain a random number sequence.

Abstract: A true random number generator is provided. The true random number generator includes an Exclusive-Or (XOR) circuit and multiple random entropy source circuits. One entropy source sampling process is performed at an output terminal of each of at least two inverters in each of the multiple random entropy source circuits, which is performed by a flip-flop corresponding to the inverter. Sampling results are inputted to an XOR unit in the random entropy source circuit and XOR processing is performed on the sampling results. XOR processing results outputted by the multiple of random entropy source circuits are inputted to the XOR circuit, and the XOR processing is performed on the XOR processing results to obtain a random number sequence.

Abstract: A physical unclonable function (PUF) circuit structure is provided, which comprises: n passive conductor groups and n XOR units, where each of the n passive conductor groups comprises m passive conductors, each of the m passive conductors comprises a first terminal connected to a power supply and a second terminal connected to an input terminal of a corresponding XOR unit of the n XOR units; and the second terminals of passive conductors within the same passive conductor group are connected to an input terminal of the corresponding XOR unit. In the circuit structure, the connection randomness of the passive conductors is achieved by using a different widths and/or different spaces of the passive conductors, and then a PUF function can be realized.