Abstract: The disclosure aims to provide a chemical synthesis method of a prodelphinidin B9 gallate, in which the prodelphinidin B9 gallate is synthesized by using a proanthocyanidin from Chinese bayberry leaves as a raw material, and using epigallocatechin gallate (EGCG) as a nucleophilic reagent to attack C4 sites of subunits EGCG and epigallocatechin (EGC) of the proanthocyanidin from Chinese bayberry leaves in the presence of hydrochloric acid as a catalyst. Compared with prodelphinidin B9 gallates extracted and separated from materials such as tea leaves, and Chinese bayberry leaves, the prodelphinidin B9 gallate prepared by the method provided in the present disclosure has higher purity and yield, and can be directly used as a nutrient enhancer and a natural antioxidant in the field of food.

Abstract: A system and method for operating a robotic system to scan and register unrecognized objects is disclosed. The robotic system may use an image data representative of an unrecognized object located at a start location to implement operations for transferring the unrecognized object from the start location. While implementing the operations, the robotic system may obtain additional data, including scanning results of one or more portions of the unrecognized object not included in the image data. The robotic system may use the additional data to register the unrecognized object.

Abstract: The present invention discloses an ultrasound-electrode-nano-porous membrane coupling hydrogen production and sterilization system, which comprises a vessel and a plurality of hydrogen production units arranged in the vessel. The hydrogen production unit comprises a cavity, and a broadband ultrasonic generator and a circular hydrogen production electrode located in the cavity. The circular hydrogen production electrode wraps around the broadband ultrasonic generator. A bottom membrane at the bottom of the cavity is hydrophobic at the inner side and hydrophilic at the outer side, and a side membrane of the cavity is hydrophilic at the inner side and hydrophobic at the outer side and is mounted vertically or obliquely upwards by an angle of 0-45 degrees.

Abstract: Disclosed are a method for determining a platelet concentration of a blood sample, a hematology system and a storage medium.

Abstract: The present disclosure discloses a method for extracting pectin rich in RG-I, in particular to an ultrasound and pressure assisted method for extracting pectin rich in RG-I. The main process includes: dispersing sieved citrus peel powers in alkaline solution containing sodium borohydride (20 to 50 mM); performing an ultrasound and pressure combined treatment on the above solution at 25 to 40° C., the treatment conditions include: static pressure of 0.2 to 0.4 MPa, ultrasonic intensity of 0.5 to 3.5 W/mL, and treatment time of 20 to 40 min; centrifuging the ultrasonically processed solution to remove residues, and sequentially carrying out precipitation with ethanol (50% to 80% v/v), precipitant dialysis (3000 to 3500 Da), and vacuum freeze drying on the extracted solution to obtain pectic polysaccharide.

Abstract: The disclosed system may include a conductive enclosure, a first printed circuit board (PCB) that includes multiple antenna feeds, and a second PCB that includes a grounding layer and one or more sensors. A first antenna feed may be electrically connected to the conductive enclosure, and a second antenna feed may be electrically connected to the grounding layer of the second PCB. As such, the grounding layer of the second PCB may act as a radiating element for a second antenna. Various other mobile electronic devices, apparatuses, and methods of manufacturing are also disclosed.

Abstract: The disclosed system may include a detachable capsule that includes a capsule-side capacitive plate. The system may also include a receiving antenna electrically connected to an antenna-side capacitive plate, and a capacitive sensor electrically connected to the capsule-side capacitive plate. The two plates may be coupled to each other and may transmit RF signals between them. The capacitive sensor may be configured to detect an amount of capacitance between the two capacitive plates. The system may also include an antenna matching tuner electrically connected to the capacitive sensor and to an antenna feed. Then, upon receiving capacitance measurements from the capacitive sensor, the antenna matching tuner may alter various parameters of the antenna feed including impedance matching parameters. Various other apparatuses and mobile wearable devices are also disclosed.

Abstract: A three-dimensional star-shaped ?-helix polypeptide having a high-efficiency gene delivery capability, and a preparation method and an application thereof. A dendrimer is used as an initiator and dichloromethane is used as a reaction solvent to initiate high-speed ring-opening polymerization of different types of N-carboxylic anhydride monomers, and groups having different electrical properties are introduced at the ends via click chemistry reactions. The abundant amino groups on the surface of the dendrimer provide enough polymerization sites to enable the polypeptide to form a three-dimensional spherical topological structure, and the topological structure provides an opportunity for initial acceleration of the ring-opening polymerization reaction. The higher positive charge density caused by polypeptide side chain modified guanidine/amino groups etc.

Abstract: A method, an apparatus, a device and a computer-readable storage medium for recognizing aerial handwriting are provided. The method may include detecting a palm region of a user in a two-dimensional grayscale image; detecting a fingertip in the two-dimensional gray-scale image based on the palm area; determining a spatial trajectory of the fingertip based on a set of two-dimensional gray-scale images, the set of two-dimensional gray-scale images including the two-dimensional gray-scale image; and recognizing handwritten content of the user based on the spatial trajectory. A two-dimensional gray-scale image is used to recognize and track the spatial trajectory of the fingertip, which may speed up aerial handwriting recognition, and has low processing performance requirements for the device, while also ensuring high accuracy.

Abstract: A method, an apparatus, a device and a computer-readable storage medium for recognizing aerial handwriting are provided. The method may include detecting a palm region of a user in a two-dimensional grayscale image; detecting a fingertip in the two-dimensional gray-scale image based on the palm area; determining a spatial trajectory of the fingertip based on a set of two-dimensional gray-scale images, the set of two-dimensional gray-scale images including the two-dimensional gray-scale image; and recognizing handwritten content of the user based on the spatial trajectory. A two-dimensional gray-scale image is used to recognize and track the spatial trajectory of the fingertip, which may speed up aerial handwriting recognition, and has low processing performance requirements for the device, while also ensuring high accuracy.

Abstract: The present invention related to a method for preparing carbon nanospheres modified current collector and its application in metal secondary battery. The said method includes the preparation of carbon nanospheres modified current collector by chemical vapor deposition process and the process for loading metal into the modified current collector as an anode. Comparing with the bare Ni, the said anode with modified current collector demonstrates enhanced stripping/plating efficiency, well confinement of Li dendrite, stable long lifespan and strengthen safety.

Abstract: The present invention related to a method for preparing carbon nanospheres modified current collector and its application in metal secondary battery. The said method includes the preparation of carbon nanospheres modified current collector by chemical vapor deposition process and the process for loading metal into the modified current collector as an anode. Comparing with the bare Ni, the said anode with modified current collector demonstrates enhanced stripping/plating efficiency, well confinement of Li dendrite, stable long lifespan and strengthen safety.

Abstract: The present invention provides a sulfur-carbon composite material, said composite material comprising a porous carbon substrate containing both micropores and mesopores and sulfur, wherein the sulfur is only contained in the micropores of the carbon substrate. Moreover, a lithium-sulfur battery with its cathode comprising said sulfur-carbon composite material and the method for preparing such material is also provided.

Abstract: The present invention relates to a sulfur-containing composite with a core-shell structure for lithium-sulfur battery, wherein the substrate of the core contains macropores and/or mesopores and optionally micropores, and the substrate of the shell is a microporous coating layer; as well as a process for preparing said sulfur-containing composite, an electrode material and a lithium-sulfur battery comprising said sulfur-containing composite.

Abstract: The present invention relates to a sulfur-containing composite with a core-shell structure for lithium-sulfur battery, wherein the substrate of the core contains macropores and/or mesopores and optionally micropores, and the substrate of the shell is a microporous coating layer; as well as a process for preparing said sulfur-containing composite, an electrode material and a lithium-sulfur battery comprising said sulfur-containing composite.

Abstract: The present invention provides a sulfur-carbon composite material, said composite material comprising a porous carbon substrate containing both micropores and mesopores and sulfur, wherein the sulfur is only contained in the micropores of the carbon substrate. Moreover, a lithium-sulfur battery with its cathode comprising said sulfur-carbon composite material and the method for preparing such material is also provided.