Abstract: The present disclosure is related to systems and methods for medical imaging. The method includes determining a sequence of scan states of a medical device for a sequence of regions of interest (ROIs) of a subject. Each of the sequence of scan states corresponds to an ROI in the sequence of ROIs. When the medical device is in a scan state of the sequence of scan states, an isocenter of the medical device is aligned with a center of the corresponding ROI. The method includes generating a set of controlling information of the medical device based on the sequence of scan states. Each of the set of controlling information is configured to switch the medical device to a corresponding scan state in the sequence of scan states. The method includes controlling the medical device to scan the sequence of ROIs. Before scanning each of the sequence of ROIs, the medical device is positioned to the corresponding scan state according to the corresponding controlling information.

Abstract: The present disclosure provides a drop impact prediction method and system for heavy equipment airdrop based on a neural network. The drop impact prediction method includes the following steps: S1: acquiring a plurality of sets of sample data by using a finite element model for drop simulation of heavy equipment airdrop; S2: determining structural parameters of a BP neural network, and pre-processing the structural parameters; S3: constructing a BP neural network model; and S4: predicting a drop impact situation of heavy equipment airdrop in an actual application process by using the trained BP neural network model.

Abstract: An optical-electronic integrated RF leakage interference cancellation system and method for continuous wave radars belongs to the technical filed of radars. The optical-electronic integrated RF leakage interference cancellation system cancels the RF leakage interference by integrating of the microwave photonic link and the cable link. The microwave photonic link implements the phase adjustment, time delay adjustment and amplitude adjustment of the microwave signal tapped from the continuous wave source in the transmitter and realizes the cancellation matching conditions of the out of phase, the matching delay time and the same amplitude with the leakage interference signal. It has the advantages of broad frequency band, large bandwidth, and high tuning resolution, which enables the effective suppression of the RF leakage interference and ensures the high transmit-to-receive isolation for continuous wave radars.

Abstract: An optical-electronic integrated RF leakage interference cancellation system and method for continuous wave radars belongs to the technical filed of radars. The optical-electronic integrated RF leakage interference cancellation system cancels the RF leakage interference by integrating of the microwave photonic link and the cable link. The microwave photonic link implements the phase adjustment, time delay adjustment and amplitude adjustment of the microwave signal tapped from the continuous wave source in the transmitter and realizes the cancellation matching conditions of the out of phase, the matching delay time and the same amplitude with the leakage interference signal. It has the advantages of broad frequency band, large bandwidth, and high tuning resolution, which enables the effective suppression of the RF leakage interference and ensures the high transmit-to-receive isolation for continuous wave radars.

Abstract: A vehicle seat includes a seat back having a foot massage system. The seat back includes a front side and rear side, the rear side receiving the foot massage system. The foot massage system is configured to pivot around an axis that is fixed relative to the seat back between a first in-use position, wherein the massage system pivots down to receive a passenger's feet, and a second folded-away position wherein the massage system is retracted along the backrest rear side. The foot massage system includes a registration area for guiding the passenger's foot to proper massage position and can be equipped with a pressure detection system having pressure sensors that, when pressed, allow the foot massage system to work.

Abstract: A photonic microwave down-conversion system and method. The oscillation loop includes an electro-optic modulator, optical narrow-band notch filter, photodetector and electrical combiner which has the function of generating the local oscillator signal. The frequency of the local oscillator signal can be flexibly adjusted by changing the lightwave frequency output from the wavelength tunable laser. The phase modulation function of the electro-optic modulator enables no RF signal output from the down-conversion photodetector It can not only down convert the RF signals with different frequencies to the intermediate frequency signals with the same frequency, but also can down convert the RF signals with the same frequency to the intermediate frequency signals with different frequencies. This can effectively overcome the limitations of complicated structure, poor RF isolation and difficulty in flexible tuning for microwave down-conversion system in the prior arts.

Abstract: A photonic microwave down-conversion system and method. The oscillation loop includes an electro-optic modulator, optical narrow-band notch filter, photodetector and electrical combiner which has the function of generating the local oscillator signal. The frequency of the local oscillator signal can be flexibly adjusted by changing the lightwave frequency output from the wavelength tunable laser. The phase modulation function of the electro-optic modulator enables no RF signal output from the down-conversion photodetector It can not only down convert the RF signals with different frequencies to the intermediate frequency signals with the same frequency, but also can down convert the RF signals with the same frequency to the intermediate frequency signals with different frequencies. This can effectively overcome the limitations of complicated structure, poor RF isolation and difficulty in flexible tuning for microwave down-conversion system in the prior arts.

Abstract: The invention, relates to Vehicle seat, comprising an upper lid mechanism configured to move between a closed position, where the upper lid mechanism covers the messages system so as to provide foot rest surface, and an open position where the upper lid mechanism transforms and opens up so as to form a foot accommodation space for foot massage. The upper lid mechanism comprises an array of flat sections, and an actuator.

Abstract: A vehicle seat comprising a seat back having a foot massage system, wherein the seat back includes front side and rear side, the rear side receiving the foot massage system, said foot massage system configured to pivot around an axis that is fixed relative to the seat back between a first in-use position, wherein the massage system pivots down to receive a passenger's feet, and a second folded-away position wherein the massage system is retreated along the backrest rear side. The foot massage system includes a registration area for guiding the passenger's foot to proper massage position and a pressure detection system having pressure sensors. Only when all of the pressure sensors are pressed, the foot massage system can start to work.

Abstract: The invention, relates to vehicle seat, comprising an upper lid mechanism configured to move between a closed position, where the upper lid mechanism covers the messages system so as to provide foot rest surface, and an open position where the upper lid mechanism transforms and opens up so as to form a foot accommodation space for foot massage. The upper lid mechanism comprises an array of flat sections, and an actuator.