Abstract: The present application provides a liquid crystal composition and a liquid crystal optical element containing the same, where the liquid crystal composition includes at least one compound of formula I, at least one compound of formula II, at least one compound of formula III, and/or at least one compound of formula IV. The liquid crystal composition may further include a chiral agent and a photosensitizer. The present invention further provides a liquid crystal optical element including the liquid crystal composition of the present invention. By using the liquid crystal composition of the present invention to fabricate a liquid crystal optical element, the difficulty of the fabrication process for a polymerizable cholesteric liquid crystal optical element can be reduced, and the diffraction efficiency of the optical element can be improved.

Abstract: Disclosed is a method for resource recycling of high-salinity wastewater treated by a solar-enhanced electrochemical process. The method includes: step S1: subjecting the high-salinity wastewater to an ion membrane electrolysis process to generate a strongly oxidizing salt solution A; step S2: mixing the strongly oxidizing salt solution A with organic wastewater to obtain a mixed solution, and activating and degrading the mixed solution with a photothermal coupled activation degradation system to obtain an activated and degraded solution; step S3: degrading the activated and degraded solution through an electrochemical oxidation degradation component to obtain a high-salinity solution; step S4: evaporating and concentrating the high-salinity solution to obtain a high-salinity concentrate; step S5: subjecting the high-salinity concentrate to the ion membrane electrolysis process to generate a strongly oxidizing salt solution B; and Step S6: repeating step S2 to step S5.

Abstract: Embodiments of this application provide a system for preparing an optical waveguide lens. Primarily, multi-beam splitting processing is performed on an exposure beam, and beams in different directions are made to interfere pairwise, thereby meeting multi-grating exposure requirements, enabling one-step formation of an in-coupling grating, a turning grating, and an out-coupling grating, reducing preparation time, and particularly improving production efficiency in large-scale production processes.

Abstract: An electric vertical take-off and landing (eVTOL) aircraft can enhance energy efficiency, safety, and operational range. A deployable wing structure can provide aerodynamic lift during horizontal flight, reducing reliance on energy-intensive propellers. Integrated flexible solar panels capture solar energy, contributing additional power and optimizing energy management. The wing system also includes an emergency descent mode, doubling as a glide-assist device for controlled landings during critical failures. The system offers modular configurations for various missions, ensuring adaptability and improved flight performance. The eVTOL can be implemented with systems and methods for mitigating motion sickness. The systems integrate tactile feedback systems into wearable devices and environmental components. Sensors detect motion and environmental changes, and a computing device can generate corresponding tactile feedback signals.

Abstract: A method for organizing and delivering content includes: searching for online content based on specification or preference of a user; automatically categorizing and organizing content based on authority specifications; delivering the automatically categorized and organized content to the user; collecting fees from user for part of the automatically categorized and organized content that require the fees; and automatically distributing royalties to content owners from the collected fees.

Abstract: Proposed are a dodecyl sulfate-doped PEDOT film and a manufacturing method therefor, the method including: coating, on a substrate, an oxidizing agent film including a dodecyl sulfate metal salt such as Fe(DS)3; and forming a PEDOT film by vapor phase polymerization. The dodecyl sulfate-doped PEDOT film according to the present disclosure has excellent electrical conductivity so as to be capable of replacing a metal, and has excellent mechanical durability, light transmittance, and aqueous solution stability.

Abstract: A magnetic vascular anastomosis device for rapid liver transplantation includes a magnetic ring assembly and a base member assembly. The magnetic ring assembly includes an O-shaped magnetic ring and a C-shaped magnetic ring coupled at a donor liver blood vessel and a receptor liver blood vessel respectively. The base member assembly includes an O-shaped base member and a C-shaped base member. The base member is categorized into a slotted base member, a columned base member, and a hooked base member for different surgical suture methods. The magnetic vascular anastomosis device incorporates with the magnetic attraction between magnetic rings, such that the entire liver transplantation vascular anastomosis process is fast, safe, and reliable. The vascular anastomosis device is able apply for different operations involving vascular anastomosis such as kidney transplantation, lung transplantation, heart transplantation, and maxillofacial surgery.

Abstract: A method of characterizing an imaging device includes calibrating the imaging device by collecting readings for regular pixels and at least one sealed pixel of the imaging device over one or more periods of time for a sequence of integration time (T) and a plurality of number of lines (NOL) when no light enters the imaging device, obtaining a dark level (DL) by averaging the readings for the regular pixels over the respective period of time and the number of the regular pixels, and obtaining P by averaging the readings of the at least one sealed pixel over the respective period of time and the number of the at least one sealed pixel. A relation between DL and P is determined for each T and NOL using an equation: DL=A*P+Offset. A current value of DL is determined by using a current value of P and the equation.

Abstract: An echo cancellation method based on delay estimation is provided. In the method, a microphone signal and a reference signal are received and preprocessed. In the preprocessed microphone signal and the preprocessed reference signal, frequency point signals with non-linearity in a current echo cancellation scenario are determined. A current delay estimation value is calculated based on frequency point signals without non-linearity in the microphone signal and the reference signal. The reference signal is shifted based on the current delay estimation value. An adaptive filter is updated based on the preprocessed microphone signal and the shifted reference signal, to perform echo cancellation.

Abstract: A target voice detection method and a target voice detection apparatus are provided. The method includes: receiving sound signals collected by a microphone array; performing a beamforming process on the sound signals to obtain beams in different directions; extracting a detection feature of each frame based on the sound signals and the beams in different directions; inputting an extracted detection feature of a current frame into a pre-constructed target voice detection model to obtain a model output result; and obtaining a target voice detection result of the current frame based on the model output result.

Abstract: Proposed are a dodecyl sulfate-doped PEDOT film and a manufacturing method therefor, the method including: coating, on a substrate, an oxidizing agent film including a dodecyl sulfate metal salt such as Fe(DS)3; and forming a PEDOT film by vapor phase polymerization. The dodecyl sulfate-doped PEDOT film according to the present disclosure has excellent electrical conductivity so as to be capable of replacing a metal, and has excellent mechanical durability, light transmittance, and aqueous solution stability.

Abstract: Provided are a voice denoising method and apparatus, a server and a storage medium. The voice denoising method comprises: acquiring voice signals synchronously collected by an acoustic microphone and a non-acoustic microphone (S100); carrying out voice activity detection according to the voice signal collected by the non-acoustic microphone to obtain a voice activity detection result (S110); and according to the voice activity detection result, denoising the voice signal collected by the acoustic microphone to obtain a denoised voice signal (S120). The effect of denoising can be enhanced, and the quality of voice signals can be improved.

Abstract: An echo cancellation method based on delay estimation is provided. In the method, a microphone signal and a reference signal are received and preprocessed. In the preprocessed microphone signal and the preprocessed reference signal, frequency point signals with non-linearity in a current echo cancellation scenario are determined. A current delay estimation value is calculated based on frequency point signals without non-linearity in the microphone signal and the reference signal. The reference signal is shifted based on the current delay estimation value. An adaptive filter is updated based on the preprocessed microphone signal and the shifted reference signal, to perform echo cancellation.

Abstract: Methods, systems, and programs for real-time surgical procedure assistance are provided. A first set of 3D poses of the 3D points on the organ may be received. An electronic organ map built for the organ via pre-surgical medical information may be retrieved. A tissue parameter of the organ may be obtained based on the first set of 3D poses and their corresponding 3D poses from the electronic organ map. A deformation transformation of the electronic organ map may be calculated based on the obtained tissue parameter and the first set of 3D poses during the surgical procedure. The deformed electronic organ map may be projected onto the organ with respect to the first set of 3D poses during the surgical procedure.

Abstract: Provided are a voice denoising method and apparatus, a server and a storage medium. The voice denoising method comprises: acquiring voice signals synchronously collected by an acoustic microphone and a non-acoustic microphone (S100); carrying out voice activity detection according to the voice signal collected by the non-acoustic microphone to obtain a voice activity detection result (S110); and according to the voice activity detection result, denoising the voice signal collected by the acoustic microphone to obtain a denoised voice signal (S120). The effect of denoising can be enhanced, and the quality of voice signals can be improved.

Abstract: A magnetic vascular anastomosis device for rapid liver transplantation includes a magnetic ring assembly and a base member assembly. The magnetic ring assembly includes an O-shaped magnetic ring and a C-shaped magnetic ring coupled at a donor liver blood vessel and a receptor liver blood vessel respectively. The base member assembly includes an O-shaped base member and a C-shaped base member. The base member is categorized into a slotted base member, a columned base member, and a hooked base member for different surgical suture methods. The magnetic vascular anastomosis device incorporates with the magnetic attraction between magnetic rings, such that the entire liver transplantation vascular anastomosis process is fast, safe, and reliable. The vascular anastomosis device is able apply for different operations involving vascular anastomosis such as kidney transplantation, lung transplantation, heart transplantation, and maxillofacial surgery.

Abstract: A target voice detection method and a target voice detection apparatus are provided. The method includes: receiving sound signals collected by a microphone array; performing a beamforming process on the sound signals to obtain beams in different directions; extracting a detection feature of each frame based on the sound signals and the beams in different directions; inputting an extracted detection feature of a current frame into a pre-constructed target voice detection model to obtain a model output result; and obtaining a target voice detection result of the current frame based on the model output result.

Abstract: The success of percutaneous radiofrequency ablation mainly depends on the accuracy of the needle insertion, making it possible to destroy the whole tumor, while avoiding damages on other organs and minimizing risks of a local recurrence. This invention presents a simulated 3D environment for user to interactively place a treatment probe to a target position.

Abstract: An apparatus, system, and method allow for cleaning and brushing irregular-shaped objects automatically. The apparatus includes: an outer portion or a container that can substantially enclose one or more irregular shaped objects, and a plurality of brushes movably coupled to an inner wall of the outer portion or the container. The apparatus can be used to wash irregular-shaped objects such as shoes, utensils, medical devices, etc. An irregular-shaped object can be placed in the apparatus, and the apparatus can be placed in a washing machine for automatic washing. Driven by a flow of water, air, or gas, the brushes can scrub the object. The apparatus can protect the object from potential damages, and/or keep washed-off sand, dirt, or other residues inside the apparatus.

Abstract: A method for labeling vessel branches forming first and second vessel systems. A 3D image is segmented to obtain vessel branches. First and second root points are then determined. Starting from the first root point, the vessel branches are traced to derive a tracing path and a break point is determined, that separates the tracing path into two portions. A region of interest in the 3D image is determined with respect to the break point, in which center lines are assigned to the first or second vessel system. A 3D cutting structure is generated based on distances measured from points on the center lines to the 3D cutting structure. Graph representations are constructed for the first and second vessel systems. The vessel branches are labeled with different labels based on the graph representations.