Abstract: A solid oxide cell (SOC) includes a fuel electrode, an oxygen electrode, and an electrolyte. In some embodiments, the solid oxide cell is a reversible proton conducting solid oxide cell (P-rSOC). In some embodiments, the oxygen electrode is a perovskite oxide material having a formula such as PrBa0.8Ca0.2Co2O5+?, PrBa0.9Co1.96Nb0.04O5, PrBaCo1.6Fc0.2Nb0.2?xO5+?, PrBa0.5Sr0.5Co1.5Fe0.5O5+? (PBSCF), or PrBaCo2O5+? (PBC) and it is coated with a perovskite oxide catalyst such as PrCoO3.

Abstract: The present disclosure provides systems and methods for audio signal generation. The method may include obtaining first audio data collected by a bone conduction sensor; and obtaining second audio data collected by an air conduction sensor, the first audio data and the second audio data representing a speech of a user, with differing frequency component. The method may also include generating, based on the first audio data and the second audio data, third audio data, wherein frequency components of the third audio data higher than a frequency point increase with respect to frequency components of the first audio data higher than the first frequency point. In some embodiments, the method may further include determining, based on the third audio data, target audio data representing the speech of the user with better fidelity than the first audio data and the second audio data.

Abstract: In an audio denoising method and system provided in the present disclosure, a gain coefficient corresponding to each frequency unit may be generated based on a parameter related to a frequency by using a frequency of an audio signal as a unit, and gain processing is performed on each frequency unit separately by using the gain coefficient. The gain coefficient corresponding to a frequency unit including more valid audio signals may be larger, and a gain coefficient corresponding to a frequency unit including fewer valid audio signals may be smaller, so that more audio signals corresponding to frequency parts including more valid audio signals are preserved, while less audio signals corresponding to frequency parts including fewer valid audio signals are preserved. In this way, fidelity and intelligibility of an audio signal are improved while quality of the audio signal is improved and noise is reduced.

Abstract: In an audio signal processing method and system for echo suppression, selection of a target audio processing mode is controlled based on strength of a speaker signal. In the method and system, a control signal is generated based on the strength of the speaker signal, and the target audio processing mode is controlled based on the control signal to perform signal processing on a microphone signal so as to obtain better voice quality. When the speaker signal does not exceed a threshold, the system selects a first mode, and performs signal processing on a first audio signal and a second audio signal to obtain a first target audio; or when the speaker signal exceeds a threshold, the system selects a second mode, and performs signal processing on a second audio signal to obtain a second target audio, and the mode can be switched based on the speaker signal.

Abstract: An audio generation method and system provided in this disclosure can dynamically select a frequency splicing point of an audio signal based on voice quality of a first audio signal and a second audio signal corresponding to each frequency in a frequency domain, divide the frequency domain into a first frequency interval and a second frequency interval, select audio signals of higher voice quality that correspond to each frequency interval for splicing, and obtain a target audio signal after fusion of the first audio signal and the second audio signal, so that voice quality of the target audio signal in each frequency interval in the frequency domain is the best, thereby improving voice quality of the target audio signal after fusion.

Abstract: The present disclosure provides systems and methods for audio signal generation. The method may include obtaining first audio data collected by a bone conduction sensor; and obtaining second audio data collected by an air conduction sensor, the first audio data and the second audio data representing a speech of a user, with differing frequency component. The method may also include generating, based on the first audio data and the second audio data, third audio data, wherein frequency components of the third audio data higher than a frequency point increase with respect to frequency components of the first audio data higher than the first frequency point. In some embodiments, the method may further include determining, based on the third audio data, target audio data representing the speech of the user with better fidelity than the first audio data and the second audio data.

Abstract: The invention refers to a method for generating an ultrashort ion bunch (22) comprising the steps of emitting a laser pulse (16) whose length is four periods or less, preferably one period, and whose power is 1 PW or more, preferably 10 PW or more; and irradiating a solid target (12) with said laser pulse (16), so as to create an ion bunch (22). The invention also refers to a corresponding system (10) for generating an ultrashort ion bunch (20) comprising the solid target (12), and a laser system (14) for generating the laser pulse (16) and irradiating the solid target (12) with the laser pulse (16), for creating an ion bunch (22).