Abstract: The present disclosure belongs to the technical field of drug preparation and relates to a perfusate containing nicotinamide (NAM) for intraocular surgery, a method of preparation and use thereof. Provided is use of NAM in perfusates for intraocular surgery. In the present disclosure, the perfusate for intraocular surgery improved with NAM may inhibit corneal endothelial cell damage caused by phacoemulsification, reduce corneal edema caused by phacoemulsification, avoid a significant decrease in the number of corneal endothelial cells (CECs) caused by phacoemulsification, promote recovery of corneal transparency after phacoemulsification, promote recovery of the normal corneal thickness, maintain the normal density and cellular morphology of CECs, and regular expression of functional proteins, and reduce complications caused by phacoemulsification. The present disclosure may provide an effective strategy for realizing the rapid recovery of normal visual function of cataract patients after surgery.

Abstract: The invention provides a multi-functional electric sharpener, which includes a housing. A top of the housing is provided with a sharpening opening covering positions of a plurality of groups of sharpening members. A guide assembly located in the sharpening opening is arranged on a bearing seat. An inner cavity of the housing is located at a bottom of the bearing seat to form an accommodating cavity. The accommodating cavity accommodates a sharpening stick that can be taken in and out through a fixing hole.

Abstract: The present invention discloses a detachable shelf connection structure and a shelf. The detachable shelf connection structure includes a first tube, a second tube, a clamping assembly, and a sleeve. The first tube includes a sleeve tube and a connecting tube, and the sleeve tube is connected to one end of the connecting tube; a wall of the sleeve tube or the second tube is provided with at least one clamping hole; the sleeve tube is inserted into one end of the second tube, and when the sleeve tube is connected to the second tube, the clamping hole in the sleeve tube is corresponding to the clamping hole in the second tube; and the clamping assembly clamps the clamping hole in the sleeve tube and the clamping hole in the second tube. The sleeve is disposed outside the clamping assembly and is clamped with the clamping assembly.

Abstract: The present invention discloses a detachable shelf connection structure and a shelf. The detachable shelf connection structure includes a first tube, a second tube, a clamping assembly, and a sleeve. The first tube includes a sleeve tube and a connecting tube, and the sleeve tube is connected to one end of the connecting tube; a wall of the sleeve tube or the second tube is provided with at least one clamping hole; the sleeve tube is inserted into one end of the second tube, and when the sleeve tube is connected to the second tube, the clamping hole in the sleeve tube is corresponding to the clamping hole in the second tube; and the clamping assembly clamps the clamping hole in the sleeve tube and the clamping hole in the second tube. The sleeve is disposed outside the clamping assembly and is clamped with the clamping assembly.

Abstract: The provided is a circuit and fuse fabrication process for a flexible printed circuit board (FPCB). The circuit and fuse fabrication process includes: pressing and bonding a release film onto a bottom of a polyethylene terephthalate (PET) silicone film; removing the release film at a circuit and fuse alignment position at the bottom of the PET silicone film through a lower circular knife die, and retaining the release film located outside the circuit and fuse alignment position; aligning the position of the PET silicone film; pressing and bonding the metal foil onto the PET silicone film with a release film side; cutting to form the circuit and the fuse; bonding a PET silicone film onto a bottom of the metal foil; removing the PET silicone film and a metal foil waste; and retaining the circuit and fuse formed by cutting on the PET silicone film with the release film side.

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

Abstract: The present disclosure is directed synthetic methods for the preparation of 4-valyloxybutyric acid. The synthetic methods described herein employ a diverse array of protecting group strategies and reaction conditions. Additionally, the present disclosure is directed to compounds useful as synthetic intermediates in the preparation of 4-valyloxybutyric acid.

Abstract: This disclosure belongs to the technical field of distributed machine learning, and specifically relates to an adaptive privacy-protection distributed learning method and device based on attenuated noise perturbation. The method includes: acquiring a local gradient of a node according to a sample gradient after node clipping, wherein a clipping threshold of the node decreases with the increase of iteration rounds; injecting Gaussian noise into the local gradient, wherein the intensity of the Gaussian noise is stepwise attenuated with the increase of iteration rounds; aggregating the local gradient of the node after injection of the Gaussian noise in each iteration round, and using the aggregated gradient to update local model parameters, and broadcasting the updated local model parameters to adjacent nodes for parameter updating; and then aggregating the updated model parameters of the adjacent nodes for the next iteration.

Abstract: A method for preparing a lyophilized preparation of BPA includes a solution preparation process and a freeze-drying process, where the solution preparation process includes: (1) dissolving BPA and polyol in an aqueous solution by using a base to obtain a clear solution; (2) regulating the clear solution back to 7.5<pH?8.5 by using an acid, to obtain a BPA solution; and the freeze-drying process includes: (3) subpackaging the BPA solution and freeze-drying under a condition with a vacuum of 10-20 Pa, to obtain the lyophilized preparation. The lyophilized preparation of BPA prepared through the method has good stability and a small content of impurities.

Abstract: The present disclosure provides a method and a system for managing and scheduling a cross-domain heterogeneous storage cluster. With optimization objectives of minimizing the total storage cost, maximizing the total throughput and minimizing a distance between a to-be-stored dataset and a position of a storage system where the storage is about to perform, constraint conditions are solved by adopting a non-dominated sorting genetic algorithm, and an optimal storage position is selected. Accordingly, the data access performance is improved, the latency is reduced, and the unnecessary consumption of network bandwidth and storage resources is reduced.

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 invention provides an intermediate used for Evans blue modified FAPI synthesis, a method for preparing the intermediate, and an application of the intermediate in the synthesis of an Evans blue modified FAPI. The use of the intermediate provided by the present invention to synthesize Evans blue modified FAPI can improve the production efficiency and reduce the production cost, and the intermediate is suitable for industrial production.

Abstract: The present disclosure is related to systems and methods for controlling a patient bed of a medical device. A method includes determining whether a first gesture on the touch panel satisfies a first trigger condition; in response to determining that the first gesture satisfies the first trigger condition, generating instructions for causing at least one icon to be displayed on the touch panel, the at least one icon being configured to control the movement of the patient bed; and determining at least one movement parameter of the patient bed based at least on a second gesture directed to the at least one icon.

Abstract: The present disclosure provides a method and a system for managing and scheduling a cross-domain heterogeneous storage cluster. With optimization objectives of minimizing the total storage cost, maximizing the total throughput and minimizing a distance between a to-be-stored dataset and a position of a storage system where the storage is about to perform, constraint conditions are solved by adopting a non-dominated sorting genetic algorithm, and an optimal storage position is selected. Accordingly, the data access performance is improved, the latency is reduced, and the unnecessary consumption of network bandwidth and storage resources is reduced.

Abstract: The present invention provides a compound targeting SSTR2, a preparation method therefor and a use thereof, and relates to the fields of nuclear medicine and molecular imaging. The compound targeting SSTR2 has a structure shown in a formula (I) below, and a compound targeting SSTR2 and capable of being labeled with a radionuclide has a structure shown in a formula (II) below. The present invention further provides a radionuclide labeled compound targeting SSTR2 that is obtained by labeling the compound shown in the formula (II) with a radionuclide. The present invention further provides methods for preparing the compounds shown in the formula (I) and the formula (II) and a use of the compounds in preparation of drugs for diagnosis and/or treatment of diseases characterized by over-expression of SSTR2.

Abstract: Disclosed is a method for detecting a data stealthy attack on a networked system with differential privacy protection, which falls within the technical field of information security. The method includes: firstly, modeling a networked system and designing an attack detection scheme based on system noise parameters; then, designing an optimal data stealthy attack scheme for an attacker according to known system information; and then, determining a moment of adding a privacy noise through a privacy noise scheduling scheme while ensuring privacy of sensitive data on the networked system, and achieving an optimal system control performance. Based on the above design, a possible data stealthy attack may be effectively detected on the basis of protecting the system data privacy and ensuring the optimal system performance.