Abstract: The present disclosure discloses a prosthetic valve leaflet material, a valve leaflet, a valve, and a preparation method thereof. The prosthetic valve leaflet material is made of polyurethane and includes an inner layer and surface layers located on opposite sides of the inner layer in the thickness direction, wherein the elastic modulus of the surface-layer polyurethane is greater than that of the inner-layer polyurethane. The valve leaflet material simultaneously takes into account fluid dynamics, biostability, biocompatibility, creep resistance, and fatigue resistance, achieving the performance required of the heart valves.

Abstract: Disclosed in the present application are a control mechanism, a locking mechanism, a loading method, and a pre-loading method for an artificial implant. The control mechanism includes a base, a pulling wire, and a locking member. The base is configured with a locking hole. The pulling wire has a free end that can be passed through, wound around, or detached from the artificial implant. The locking member and the base are rotatably engaged to lock the free end of the pulling wire. After the control mechanism is optimized, it can cooperate to realize the control of the expansion, release, or withdrawal process of the artificial implant in the body, which is more suitable for internal work than existing structures.

Abstract: Disclosed in this application are a control mechanism, a control handle, a delivery system and a control method for an artificial implant, and an artificial heart valve. The control mechanism includes a base, a pulling wire, and a locking member, wherein the pulling wire is configured with a free end which can pass through the artificial implant or be detached from the artificial implant, the locking member movably engaged with the base, and the locking member cooperates with the free end of the pulling wire to lock the artificial implant. After the control mechanism is optimized, the control of the release or withdrawal process of the artificial implant in the body can be achieved by means of mutual cooperation. Compared with existing structures, the control mechanism is more suitable for working inside the body.

Abstract: The present disclosure relates to the technical field of medical devices, and in particular to catheter implant systems and included associated device, prosthetic heart valves and method. The interventional delivery system included includes a catheter assembly and a control handle connected to the catheter assembly, the catheter assembly has opposing distal and proximal ends and includes an inner sheath and an outer sheath slidably engaged with each other, the outer sheath includes a loading section and a sheath section in sequence from the distal end to the proximal end, the loading section is configured to enclose and keep the interventional device in a compressed state; the control handle includes a main handle and an auxiliary handle slidably fitted over the inner sheath, the proximal end of the inner sheath is connected to the main handle and the proximal end of the outer sheath is connected to the auxiliary handle.

Abstract: Systems and methods for synthesizing speech based on received text and one or more emulated speech parameters. Text is received with one or more emulated speech parameters that indicate one or more features for the synthesized speech. Synthesized speech audio is generated based on the received parameters. The synthesized speech audio data is provided to an emulated microphone component that provides the synthesized audio to an automatic speech recognizer. The automatic speech recognizer utilizes one or more speech recognition models to generate converted text based on the synthesized speech audio data.

Abstract: A method of controlling size of a congestion window, includes, at a transmitting device, transmitting a plurality of data packets over a communication channel from the transmitting device to a receiver, determining a queuing delay and a loss rate of the transmission, comparing the queuing delay to a threshold queuing delay, comparing the loss rate to a threshold loss rate, and in response to a determination that the queuing delay is greater than the threshold queuing delay and the loss rate is greater than the threshold loss rate, resetting the size of the congestion window in accordance with a function of the current size of the congestion window, the queuing delay, and the loss rate, wherein at equilibrium the function generates a value inversely proportional to a weighted sum of an excess queuing delay and an excess loss rate.

Abstract: A method of controlling size of a congestion window, includes, at a transmitting device, transmitting a plurality of data packets over a communication channel from the transmitting device to a receiver, determining a queuing delay and a loss rate of the transmission, comparing the queuing delay to a threshold queuing delay, comparing the loss rate to a threshold loss rate, and in response to a determination that the queuing delay is greater than the threshold queuing delay and the loss rate is greater than the threshold loss rate, resetting the size of the congestion window in accordance with a function of the current size of the congestion window, the queuing delay, and the loss rate, wherein at equilibrium the function generates a value inversely proportional to a weighted sum of an excess queuing delay and an excess loss rate.