Abstract: An LED filament comprising a plurality of LED filament units, each of the plurality of LED filament units includes a LED chip with an upper surface and a lower surface opposite to the upper surface of the LED chip, and a light conversion layer comprising a top layer and a base layer, and the base layer comprises an upper surface and a lower surface opposite to the upper surface of the base layer, where the top layer with an upper surface and a lower surface opposite to the upper surface of the top layer is disposed on at least two sides of each of the LED chips, the lower surface of each of the LED chips is close to the upper surface of the base layer, and the upper surface of the top layer is away from each of the LED chips.

Abstract: A human-body-signal collection device (10). The human-body-signal collection device (10) includes a reference electrode (210), a first electrode (220) and a second electrode (230), an adjusting and generating device (30), a first collection device (40), and a first feedback device (50). The first electrode (220) outputs the first signal. The second electrode (230) outputs the second signal. The adjusting and generating device (30) is connected to the reference electrode (210) to output a reference signal to the reference electrode (210). The first collection device (40) collects the first signal and the second signal, and generates a first potential-difference signal based on the first signal and the second signal. The first feedback device (50) is connected to the first collection device (40) and the adjusting and generating device respectively.

Abstract: An image object classification method and system are disclosed. The method is executed by a processor coupled to a memory. The method includes: providing an image file including at least one image object, performing a process of extracting multiple binary-classified characteristics on the image object to obtain a plurality of first results independent of each other in categories, combining the plurality of first results in a manner of dimensionality reduction based on concatenation, performing a process of characteristics abstraction on the combined first results to obtain a second result, and performing a process of characteristics integration on the plurality of first results and the second result in a manner of dot product of matrices to obtain a classification result.

Abstract: An advertisement publishing method comprises following steps: recognizing current condition of the advertisement broadcasting terminal. Determining whether the recognized condition meets the publishing condition. Generating and sending a signal to the advertisement server to signal the advertisement server to provide an advertisement when the current condition of the advertisement broadcasting terminal meets the publishing condition. Generating an advertisement broadcasting interface and displaying the advertisement broadcasting interface on the display screen of the advertisement broadcasting terminal. And receiving the advertisement and broadcasting the advertisements provided by the advertisement server on the generated interface.

Abstract: An electronic device includes a storage unit, a touch input unit, a display unit, and a processor. The storage unit is used for storing decryption passwords. The touch input unit is configured to select a file for encryption/decryption, and to generate corresponding handwriting input signals in response to the handwritten signature of a user on the touch input unit. The processor includes a detecting module, a feature extracting module, and an encryption and decryption module. The detecting module detects the coordinates of the handwriting of the user's signature. The feature extracting module extracts the feature of the user's signature according to the detected coordinates, and stores the extracted feature of the user's signature. The encryption and decryption module uses the features of the user's signature as a password to encrypt or decrypt the selected file. An encryption method and a decryption method are also provided.