57results about How to "Noise suppression" patented technology

A circuit board having high adhessiveness contact between electrically insulating layers and having a low interlayer electric resistance is provided. A circuit board is provided with a first conductive layer formed on a core ( 1 ) and a first electrically insulating layer formed thereon. In the circuit board, a first conductor layer has a surface roughness Ra of 0.1 nm or more but less than 100 nm, and a first primer layer having a thiol compound as a main material is provided between the first conductive layer and the first electrically insulating layer. Thus, the circuit board which has excellent adhesiveness between the first conductor layer and the first electrically insulating layer and is also applicable to high frequency signal is provided.

The invention discloses a double-closed-loop control circuit of a micromechanical gyroscope and belongs to the field of guide or control devices based on a Coriolis effect. The circuit is used for closed-loop control of driving and detection modes of the micromechanical gyroscope. A simplified self-oscillation closed-loop control circuit based on automatic gain control (AGC) is employed for the driving mode of the circuit, and the frequency stability and amplitude stability of the micromechanical gyroscope in the driving mode can be effectively improved; and a six-order continuous band-pass Sigma Delta M closed-loop control circuit for the detection mode has six-order noise reshaping capacity, and the signal to noise ratio (SNR), linearity and zero-bias stability of a system detection signal can be improved. The double-closed-loop control circuit of the micromechanical gyroscope is easy to control and simple, the accuracy of a system is improved, the SNR of the system is high, and the system is self-adaptively adjusted and high in stability.

A cushion body and foam resin particles for filling in the cushion body capable of solving such a problem that, when the cushion bodies such as a bed, a mattress, a pillow, and a cushion are used for performing a cushioning function, noise is generated each time the cushion bodies are moved to provide uncomfortable feeling to users or awake the users while asleep, wherein foam resin particles with a specified average particle size containing a specified amount of fluidization accelerator are used as the filler for the cushion body.

The method for restrains noise in multiple parties telephone system includes such steps as in procedure of launching a call, user through handset dials a long string of digits including special service number, number of meeting room or group number for multiple parties telephone system; MAP addressing from result of querying database, and querying state of called telephone; hardware server decides whether the call is continued or not; if reproducing signal occurs from exchanger in local bureau, sending a hang up signal to exchanger; if state of called phone is in idle, sanding command to put phone through; in talking procedure, when change of phone state occurs, and reproducing signal will occur, sending a hang up signal to exchanger. The advantages are reliable performances and good effect of use.

The H-bridge circuit consists of first and second switch unit, and first and second linear unit, and is used to impress driving current on motor. The error amplifier generates error signal that presents the difference between command current signal and driving current detected by current detection circuit. The status control circuit simultaneously controls first and second switch unit and feed back circuit. The error signal is selectively impressed on first and second linear unit to make one of them operate at linear mode and other one operate at off state in order to control driving current being in direct proportion to command current signal. The status circuit also controls braking circuit to make error signal convert to braking signal, and first and second linear unit operate at on state mode.

The invention discloses a road extraction method using a non-subsampled contourlet direction field, which mainly overcomes the shortcomings that the road extraction is incomplete and the road is wrongly linked or incompletely linked in the original road extraction method for remote sensing images. The method comprises the following steps: (1) performing non-subsampled contourlet transform (NSCT) on an input remote sensing image to obtain a direct sub-band needing to be processed; (2) estimating the direction field of a direction sub-band and performing directional sub-band correction; (3) performing scale correlation processing on the processed direction sub-band; (4) primarily extracting the road; (5) post-processing the primary road extraction result according to the characteristics of length, direction and shape of road segments; and (6) linking the road segments according to the characteristics of the road segment direction field and the road mutual characteristics. The method canperfectly extract relatively fuzzy road characteristics of the remote sensing images and eliminate interference of the non-road information, ensures relatively accurate extraction result and is applicable to the road extraction application for the remote sensing images.