Abstract: A medical device (100), comprising: a stent graft (110), defined thereon with an opening (111); a catheter (120), configured to be partially arranged inside the stent graft (110); and a restraint member (130), configured to apply a radial compression force to the stent graft (110), so as to radially compress the stent graft (110) into a compressed configuration; the medical device (100) is configured so that the opening (111) is in positional correspondence with a distal end of the catheter (120) when the stent graft (110) is in the compressed configuration; the distal end refers to an end that first enters a body of a patient during use of the medical device (100). The medical device (100) can be used for the treatment for vascular lesions involving the aortic arch, which is favorable for establishing access in the branch vessel and shortening the operation duration.

Abstract: A covered stent and a medical device. The medical device includes a covered stent including a main stent and a first branch stent. A first interface, a second interface and a third interface are provided on a side surface of the main stent and spaced along an axial direction of the main stent, the first interface receives the first branch stent, the second interface receives a second branch stent, and/or the third interface receives a third branch stent. The covered stent further includes a restraining assembly arranged on the main stent, and the restraining assembly applies to the main stent a tensile force toward an inner cavity of the main stent. At least a portion of the main stent that is provided with the second interface and the third interface is recessed toward the inner cavity of the main stent.

Abstract: Particular embodiments may receive signals periodically detected by a mobile device and transmitted by multiple fixed-location signal sources within an environment, wherein the mobile computing device includes at least a camera. A spatial distribution of signal strengths is determined based on the detected signals, and relative positions of the mobile computing device are identified using the detected spatial distribution of signal strengths. The system may receive and analyze the images of the environment captured by the camera and calibrate the relative positions using the image analysis results. A map of spatial distribution of signal strengths is created by correlating the spatial distribution of signal strengths with the calibrated relative positions.

Abstract: Particular embodiments of a mobile device periodically detect signals transmitted by multiple fixed-location signal sources within a bounded area. A signal-location mapping is created based on the detected signals and their signal strength levels at the relative positions of the mobile computing device within the bounded area. The signal-location mapping may be created by generating a spatial distribution of signal strengths throughout the bounded area. Once the signal-location mapping has been created, particular embodiments may identify a relative position of a second mobile computing device with respect to the environment using the map of spatial distribution of signal strengths in accordance with a detected second spatial distribution of signal strengths.

Abstract: Particular embodiments of a mobile device periodically detect signals transmitted by multiple fixed-location signal sources within a bounded area. A signal-location mapping is created based on the detected signals and their signal strength levels at the relative positions of the mobile computing device within the bounded area. The signal-location mapping may be created by generating a spatial distribution of signal strengths throughout the bounded area. Once the signal-location mapping has been created, particular embodiments may identify a relative position of a second mobile computing device with respect to the environment using the map of spatial distribution of signal strengths in accordance with a detected second spatial distribution of signal strengths.

Abstract: Particular embodiments of a mobile device periodically detect signals transmitted by multiple fixed-location signal sources within a bounded area. A signal-location mapping is created based on the detected signals and their signal strength levels at the relative positions of the mobile computing device within the bounded area. The signal-location mapping may be created by generating a spatial distribution of signal strengths throughout the bounded area. Once the signal-location mapping has been created, particular embodiments may identify a relative position of a second mobile computing device with respect to the environment using the map of spatial distribution of signal strengths in accordance with a detected second spatial distribution of signal strengths.