Abstract: A driving device and a driving method for an electric assisted bicycle are provided. The driving device includes a motor, a rotation speed sensor, a torque sensor and a controller. The rotation speed sensor senses a rotation speed value of a crank or a chainring of the electric assisted bicycle. The torque sensor obtains an average torque value applied by the crank to the chainring of the electric assisted bicycle. The controller controls an output of the motor in response to the rotation speed value and the average torque value.

Abstract: An actuating and sensing module is disclosed and includes a bottom plate, a gas pressure sensor, a thin gas transportation device and a cover plate. The bottom plate includes a pressure relief orifice, a discharging orifice and a communication orifice. The gas pressure sensor is disposed on the bottom plate and seals the communication orifice. The thin gas transportation device is disposed on the bottom plate and seals the pressure relief orifice and the discharging orifice. The cover plate is disposed on the bottom plate and covers the gas pressure sensor and the thin gas-transportation device. The cover plate includes an intake orifice. The thin gas transportation device is driven to inhale gas through the intake orifice, the gas is then discharged through the discharging orifice by the thin gas transportation device, and a pressure change of the gas is sensed by the gas pressure sensor.

Abstract: A laser device is provided. The laser device includes a stack of epitaxial layers, a first conductive layer, an intermediate layer, and a first electrode. The stack of epitaxial layers has a central region and an edge region. The stack of epitaxial layers includes a first reflective structure, an active region disposed on the first reflective structure, a second reflective structure disposed on the active region. The first conductive layer disposes on the stack of epitaxial layers and covers the central region and at least a part of the edge region. The intermediate layer has a first opening that corresponding to the central region of the stack of epitaxial layers, wherein the intermediate layer comprises insulating material or metal. The first electrode disposes on the first conductive layer.

Abstract: A surface covering is provided. The surface covering is made of a composition of a polymer a bio-based plasticizer, a stabilizer, and a co-stabilizer.

Abstract: An electrochemical equipment and system thereof for reduction of carbon dioxide is provided with cathode compartment, catholyte compartment, anode compartment, anolyte chamber, and isolation unit.

Abstract: In one example, an electronic device may include a housing having an opening and an antenna assembly disposed in the housing. The antenna assembly may include an antenna mounted to the housing, an antenna module disposed corresponding to the opening, and a cable to connect the antenna to the antenna module via routing the cable through the opening.

Abstract: A low-delay hybrid noise reduction system includes a reference audio receiving device, an error audio receiving device, an audio output device, and an audio processing device. The audio processing device includes a feedforward noise reduction filter module, a feedback noise reduction filter module, and a mixer. The feedforward noise reduction filter module includes a feedforward least mean squares (LMS) filter, a low-stage finite impulse response (FIR) filter, and 1st to Nth-stage biquad filters. The 1st to Nth-stage biquad filters is set on the input end of the low-stage finite impulse response filter to perform low-delay filtering on the reference source audio signal received and outputs to the low-stage FIR filter so as to output the feedforward noise reduction signal through the low-stage FIR filter.

Abstract: The present invention provides an improved noise separation hybrid type ANC system, which includes a reference audio receiving device, an error audio receiving device, an audio output device, and an audio processing device. The audio processing device includes a feed-forward noise cancellation filter module, a feedback noise cancellation filter module, a mixer, a noise shaper, a first infinite impulse response filter, and a second infinite impulse response filter. When the noise bandwidth detector detects irregular noise, it adjusts the coefficient of the first infinite impulse response filter to set it as a low-pass filter; when regular noise is detected, the coefficient of the second infinite impulse response filter is adjusted to set it as a band-pass filter.

Abstract: A biquad hybrid active noise cancellation (ANC) device includes a reference microphone (MIC), an error MiC, a speaker, and a controller. The controller is connected to the reference MiC, the error MiC, and the speaker, wherein the controller includes a feedforward biquad ANC filter, a feedback biquad ANC filter, and a mixer, the feedforward biquad ANC filter processes reference noise to generate a feedforward noise control signal, the feedback biquad ANC filter processes residual noise received by the error MiC to generate a feedback noise control signal, and the feedforward noise control signal generated by the feedforward biquad ANC filter and the feedback noise control signal generated by the feedback biquad ANC filter are added by the mixer and transmits to the speaker for playing.

Abstract: A low-delay hybrid noise reduction system includes a reference audio receiving device, an error audio receiving device, an audio output device, and an audio processing device. The audio processing device includes a feedforward noise reduction filter module, a feedback noise reduction filter module, and a mixer. The feedforward noise reduction filter module includes a feedforward least mean squares (LMS) filter, a low-stage finite impulse response (FIR) filter, and 1st to Nth-stage biquad filters. The 1st to Nth-stage biquad filters is set on the input end of the low-stage finite impulse response filter to perform low-delay filtering on the reference source audio signal received and outputs to the low-stage FIR filter so as to output the feedforward noise reduction signal through the low-stage FIR filter.

Abstract: A power converter and control circuit are provided. The control circuit has a power controller for turning on the power switch to maintain a desired output voltage and mode selection switch provides a mode selection signal. Depending on the magnitude of an input voltage of the power converter, in which the mode selection circuit compares the input voltage of the power converter with a reference voltage, a modulation controller is configured to turn on a modulation switch to activate the capacitor according to the mode selection signal.

Abstract: A noise control system comprises a feedforward module, a feedback module, an error pre-processing module, and a signal integrating module. The feedforward module is configured to receive a reference signal and output a feedforward anti-noise signal by performing feedforward processing to the reference signal. The feedback module is configured to receive an error signal and output a feedback anti-noise signal by performing feedback processing to the error signal. The error pre-processing module is configured to receive the error signal and output a first pre-processing signal to the feedforward module and a second pre-processing signal to the feedback module. The signal integrating module is configured to output an integrated anti-noise signal integrated from the feedforward anti-noise signal and the feedback anti-noise signal.

Abstract: A membrane electrode assembly includes a first electrode, a second electrode, and an anion exchange membrane disposed between the first electrode and the second electrode. The first electrode includes a first metal mesh, a first catalyst layer wrapping the first metal mesh, a second metal mesh, and a second catalyst layer wrapping the second metal mesh. The first metal mesh is disposed between the anion exchange membrane and the second metal mesh. The second metal mesh is thicker than the first metal mesh, and the first catalyst layer is thicker than the second catalyst layer. The second catalyst layer is iron, cobalt, manganese, zinc, niobium, molybdenum, ruthenium, platinum, gold, or aluminum. The second catalyst layer is crystalline.

Abstract: In examples in accordance with the present disclosure, a stylus device is described. An example stylus device includes a body portion having an opening. The example stylus device also includes a retractable attachment mechanism to connect the stylus device to a receiver mechanism. The example attachment mechanism includes a magnet to cause the attachment mechanism to extend through the opening in response to a magnetic force. The example attachment mechanism also includes a bias mechanism to retract the attachment mechanism into the body portion.

Abstract: A power converter and control circuit are provided. The control circuit has a power controller for turning on the power switch to maintain a desired output voltage and mode selection switch provides a mode selection signal. Depending on the magnitude of an input voltage of the power converter, in which the mode selection circuit compares the input voltage of the power converter with a reference voltage, a modulation controller is configured to turn on a modulation switch to activate the capacitor according to the mode selection signal.

Abstract: A membrane electrode assembly includes a first electrode, a second electrode, and an anion exchange membrane disposed between the first electrode and the second electrode. The first electrode includes a first metal mesh, a first catalyst layer wrapping the first metal mesh, a second metal mesh, and a second catalyst layer wrapping the second metal mesh. The first metal mesh is disposed between the anion exchange membrane and the second metal mesh. The second metal mesh is thicker than the first metal mesh, and the first catalyst layer is thicker than the second catalyst layer. The second catalyst layer is iron, cobalt, manganese, zinc, niobium, molybdenum, ruthenium, platinum, gold, or aluminum. The second catalyst layer is crystalline.

Abstract: A noise control system comprises a feedforward module, a feedback module, an error pre-processing module, and a signal integrating module. The feedforward module is configured to receive a reference signal and output a feedforward anti-noise signal by performing feedforward processing to the reference signal. The feedback module is configured to receive an error signal and output a feedback anti-noise signal by performing feedback processing to the error signal. The error pre-processing module is configured to receive the error signal and output a first pre-processing signal to the feedforward module and a second pre-processing signal to the feedback module. The signal integrating module is configured to output an integrated anti-noise signal integrated from the feedforward anti-noise signal and the feedback anti-noise signal.

Abstract: A driving device and a driving method for an electric assisted bicycle are provided. The driving device includes a motor, a rotation speed sensor, a torque sensor and a controller. The rotation speed sensor senses a rotation speed value of a crank or a chainring of the electric assisted bicycle. The torque sensor obtains an average torque value applied by the crank to the chainring of the electric assisted bicycle. The controller controls an output of the motor in response to the rotation speed value and the average torque value.

Abstract: The present invention provides an improved noise separation hybrid type ANC system, which includes a reference audio receiving device, an error audio receiving device, an audio output device, and an audio processing device. The audio processing device includes a feed-forward noise cancellation filter module, a feedback noise cancellation filter module, a mixer, a noise shaper, a first infinite impulse response filter, and a second infinite impulse response filter. When the noise bandwidth detector detects irregular noise, it adjusts the coefficient of the first infinite impulse response filter to set it as a low-pass filter; when regular noise is detected, the coefficient of the second infinite impulse response filter is adjusted to set it as a band-pass filter.

Abstract: A method for controlling a power converter includes turning on a power switch to maintain a desired output voltage, wherein the power switch is coupled to a primary winding to control a primary current flow and the output voltage is provided by a secondary winding. The method also includes adding a capacitance in parallel to the power switch at a time determined by a magnitude of an input voltage to the power converter. Here, the timing of adding the capacitance depends on the operation mode of the power controller. In a low input voltage mode, the capacitance is added in a demagnetization-time during which the secondary winding discharges. In a high input voltage mode, the capacitance is added in a discontinuous time.