31results about How to "Reduce the impact of changes" patented technology

A fast turn on compensation system for a synthesized signal source includes a synthesized signal source coupled to a power supply and configured to generate a phase stable radio frequency (RF) output signal. A mute amplifier is coupled to the synthesized signal source and the power supply. A dummy amplifier is coupled to the mute amplifier and the power supply. A mute controller is coupled to the mute amplifier and the dummy amplifier, the mute controller is responsive to an enable signal and configured to enable the dummy amplifier and disable the mute amplifier when no RF output signal is being generated and disable the dummy amplifier and enable the mute amplifier when the RF output signal is being generated such that total power supply current delivered to the synthesized signal source and the dummy amplifier or mute amplifier is approximately constant before, during, and after enabling the mute amplifier to reduce phase disturbance of the RF output signals.

The invention relates to a head support for a PET / CT (positron emission computed tomography) scanning bed. The head support comprises a head support body which is arranged on the scanning bed and comprises a bracket, wherein the bracket comprises a positioning plate connected with the scanning bed by virtue of a locking device, a head support plate which forms an upward angle with the positioning plate and two arm support plates; the two arm support plates are positioned on two sides of the head support plate and form upward angles with the head support plate; the outer sides of the head support plate and the arm support plates are wrapped with an integrally-molded head pillow. The relative positions of the head support and the scaning bed are defined, so that the influence of the abnormal status of a patient head is reduced, the image scanning quality is improved, the body posture requirements of the patient during PET / CT scanning are met, an included angle between the EML of the patient and the horizontal surface of the scanning bed is within a range of 90+ / -5 degrees, so that relatively clear brain tissue structures can be obtained in scanned images, especially the display of a subtentorial fourth ventricle and a supratentorial basal ganglia is favorable; meanwhile, both arms of the patient are effectively supported, and the comfort degree is increased.

A value of a line-to-line resistor (24) is determined by subtracting a resistance value determined as a product of a voltage ratio based on divided voltages and a value of a reference resistor in a non-conductive state between a second electric wire (26) and a third electric wire (27) from a resistance value determined as a product of a voltage ratio based on the divided voltages and the value of the reference resistor in a conductive state therebetween. Once the value of the line-to-line resistor (24) is determined, it becomes possible to determine a compensated resistance value related to temperature.

A cardiology rehabilitation training device and operation method, including a support rod, a lower fixing cylinder, an upper fixing cylinder, a limit sleeve, an adjustment sleeve, a limit rod, a reinforcement sleeve, an adjustment disc, a handle, and a reset sleeve. The lower part of the support rod It has a fixed sleeve, the inner side of the fixed sleeve is adapted to the fixed rod, the fixed rod is connected to the fixed sleeve, the fixed sleeve is stuck on the fixed rod, and the lower part of the fixed sleeve is connected to the balance bolt by thread, and the balance bolt is arranged on On both sides of the fixed sleeve, the upper end of the balance bolt is pushed against the lower side of the fixed rod, the upper end of the support rod is connected to the lower fixed cylinder, the upper side of the lower fixed cylinder is adapted to the upper fixed cylinder, and the two sides of the upper fixed cylinder are connected by screws The lower fixing cylinder is connected, and a sliding cavity is formed inside the lower fixing cylinder and the upper fixing cylinder, and the right side of the sliding cavity has a limiting protruding bar groove, and the limiting protruding rod grooves are symmetrically distributed on both sides of the sliding cavity.