Abstract: A low-computation underwater acoustic wake-up method based on a multi-carrier signal is provided. A multi-carrier signal corresponding to communication nodes is constructed, absolute values of the multi-carrier signal in a window at a receiver are summed for signal arrival detection, and then frequency points of the multi-carrier signal are detected many times by using the real fast Fourier transform to realize wake-up detection. The method is suitable for accurate wake-up at any distance within a maximum communication distance of two underwater acoustic nodes, has a small amount of calculation, and is suitable for low-power single-chip microcomputers. The modem can be in a low-power sleep state for a long time.

Abstract: A handle assembly (12) of a hand-held surgical instrument (10) includes a handle housing (26), a motor (36), and a dual thread lead screw (46) operably coupled to the motor (36) and configured to move proximally and/or distally in response to an actuation of the motor (36). A first thread pitch of the lead screw (46) is suitable for effecting a closing of jaw members (20a, 20b) of an end effector (20), and a second thread pitch of the lead screw (46) is suitable for effecting a stapling function of the end effector (20).

Abstract: A surgical stapling device includes a staple reload and a handle assembly that supports a drive rack, a motor assembly, a gear assembly, a reload select mechanism, and a safety toggle mechanism. The gear assembly is adapted to facilitate uncoupling of the motor assembly from the drive rack to allow manual movement of the drive rack. The reload select mechanism allows the length of a stroke of the drive rack to be selectively adjusted to allow the stapling device to accommodate different length staple reloads. The safety toggle mechanism is provided to move the stapling device from a non-firing state to a firing state to allow for firing of the stapling device.

Abstract: A surgical stapling device includes a staple reload and a handle assembly that supports a drive rack, a motor assembly, a gear assembly, a reload select mechanism, and a safety toggle mechanism. The gear assembly is adapted to facilitate uncoupling of the motor assembly from the drive rack to allow manual movement of the drive rack. The reload select mechanism allows the length of a stroke of the drive rack to be selectively adjusted to allow the stapling device to accommodate different length staple reloads. The safety toggle mechanism is provided to move the stapling device from a non-firing state to a firing state to allow for firing of the stapling device.

Abstract: A low-computation underwater acoustic wake-up method based on a multi-carrier signal is provided. A multi-carrier signal corresponding to communication nodes is constructed, absolute values of the multi-carrier signal in a window at a receiver are summed for signal arrival detection, and then frequency points of the multi-carrier signal are detected many times by using the real fast Fourier transform to realize wake-up detection. The method is suitable for accurate wake-up at any distance within a maximum communication distance of two underwater acoustic nodes, has a small amount of calculation, and is suitable for low-power single-chip microcomputers. The modem can be in a low-power sleep state for a long time.

Abstract: A handle assembly (12) of a hand-held surgical instrument (10) includes a handle housing (26), a motor (36), and a dual thread lead screw (46) operably coupled to the motor (36) and configured to move proximally and/or distally in response to an actuation of the motor (36). A first thread pitch of the lead screw (46) is suitable for effecting a closing of jaw members (20a, 20b) of an end effector (20), and a second thread pitch of the lead screw (46) is suitable for effecting a stapling function of the end effector (20).

Abstract: A surgical stapling device includes a staple reload and a handle assembly that supports a drive rack, a motor assembly, a gear assembly, a reload select mechanism, and a safety toggle mechanism. The gear assembly is adapted to facilitate uncoupling of the motor assembly from the drive rack to allow manual movement of the drive rack. The reload select mechanism allows the length of a stroke of the drive rack to be selectively adjusted to allow the stapling device to accommodate different length staple reloads. The safety toggle mechanism is provided to move the stapling device from a non-firing state to a firing state to allow for firing of the stapling device.

Abstract: A method for eliminating pump noise by empirical mode decomposition and particle swarm optimization is provided. In the method, based on a hypothesis of the pump noise being a linear combination of a group of bases, an extracted pump noise sample is decomposed into a group of signals as bases by the empirical mode decomposition. Coefficients of the optimized linear combination of the group of bases is determined by the particle swarm optimization, thus updating the pump noise sample and improving a noise elimination effect. During a limited number of noise elimination periods, a current pump noise sample is modified by weighting, such that in a limited number of iterations, the current pump noise sample gradually converges to the pump noise waveform in the unit of a varied period, so as to be applicable to a slow variation of the pump noise during a long-time operation of the system.