Abstract: Disclosed in the present invention is a preparation method for a polyester, relating to the technical field of organic catalysis and polymeric materials. The preparation method in the present invention comprises: (1) using pyridine and saccharin in a ratio of 1:1 to prepare pyridine saccharin salt in tetrahydrofuran at 60° C. and separating the pyridine saccharin salt out in methanol and hexane. (2) Freeing out a small amount of pyridine from the pyridine saccharin salt in a heating state, catalyzing by the pyridine saccharin salt and pyridine a cyclic lactone or a carbonate to be ring-opened and polymerized to form the polyester; and the system has no other compound residues. (3) In the presence of an alcohol initiator, catalyzing by the pyridine saccharin salt the cyclic lactone to be ring-opened and polymerized to obtain the polyester. The catalytic system can efficiently synthesize a specific polylactone.

Abstract: Embodiments of the present invention relate to water leakage detection. Data obtained by a smart electricity meter during a predefined time period is collected, where the smart electricity meter is associated with a water-consuming unit. Usages of certain electric appliances in the water-consuming unit during the predefined time period are determined based on the collected data. The electricity consumption of those appliances is correlated to water consumption. The legitimate water consumption of the water-consuming unit during the predefined time period is then determined based on the usages of the electric appliances.

Abstract: Resorbable implants, coverings and receptacles comprising poly(butylene succinate) and copolymers thereof have been developed. The implants are preferably sterilized, and contain less than 20 endotoxin units per device as determined by the limulus amebocyte lysate (LAL) assay, and are particularly suitable for use in procedures where prolonged strength retention is necessary, and can include one or more bioactive agents. The implants may be made from fibers and meshes of poly(butylene succinate) and copolymers thereof, or by 3d printing molding, pultrusion or other melt or solvent processing method. The implants, or the fibers preset therein, may be oriented. These coverings and receptacles may be used to hold, or partially/fully cover, devices such as pacemakers and neurostimulators. The coverings, receptacles and implants described herein, may be made from meshes, webs, lattices, non-wovens, films, fibers, foams, molded, pultruded, machined and 3D printed forms.

Abstract: The invention relates to a composition comprising (A) a propylene-based polymer, (B) an elastomer of ethylene and ?-olefin comonomer having 4 to 10 carbon atoms and (C) an inorganic filler, wherein (A) the propylene-based polymer has a melt flow index of 60 to 150 dg/min measured according to ASTM D1238 (2.16 kg/230° C.) and wherein (B) the elastomer has a density of 0.840 to 0.865 g/cm3, wherein (B) the elastomer has a melt flow index of 3 to 13 dg/min measured in accordance with ASTM D1238 using a 2.16 kg weight and at a temperature of 190° C., wherein the amount of (B) the elastomer is 2 to 30 wt % based on the total composition, wherein the amount of (C) the inorganic filler is 0.1 to 30 wt % based on the total composition.

Abstract: An embodiment of the present disclosure provides a driving circuit, a driving method thereof, a display panel and a display device. The driving circuit includes a first transistor electrically connected between a signal input terminal and a light emitting device to be driven, a duration control circuit configured to provide a signal of a duration data signal terminal to a gate of the first transistor in response to a signal of a duration scanning signal terminal, and a latch circuit electrically connected with the gate of the first transistor and configured to latch the signal of the gate of the first transistor.

Abstract: It discloses a polyether polyols for preparing flexible polyurethane foam, and a preparation method and application thereof. The method comprises the following steps: (1) carrying out a reaction on phosphorus oxychloride, epichlorohydrin, a first acidic catalyst and an inert solvent in a first microchannel reactor to obtain a chloroalkoxy phosphorus compound; (2) carrying out a reaction on the chloroalkoxy phosphorus compound, glycidol, a second acidic catalyst and an inert solvent in a second microchannel reactor to obtain a hydroxy compound; (3) carrying out a ring-opening reaction on the hydroxy compound, epoxy vegetable oil, a basic catalyst and an inert solvent in a third microchannel reactor to obtain a vegetable oil polyol; and (4) carrying out an addition polymerization reaction on the vegetable oil polyol, propylene oxide and an inert solvent in a fourth microchannel reactor to obtain the polyether polyols for preparing flexible polyurethane foam.

Abstract: A pipe- or tube-shaped article having an innermost layer, wherein the innermost layer has a thickness of 0.001 to 100 mm and comprises a polyolefin composition comprising a) a propylene-ethylene copolymer, wherein the amount of repeat units derived from ethylene is 1 to 20 wt % based on the weight of the propylene-ethylene copolymer and wherein the propylene-ethylene copolymer has a density of at most 0.9 g/cm3 as determined by ASTM D1505 and b) an olefin polymer selected from high-density polyethylene HDPE), linear low density polyethylene (LLDPE), polypropylene (PP) and combinations thereof.

Abstract: Resorbable implants, coverings and receptacles comprising poly(butylene succinate) and copolymers thereof have been developed. The implants are preferably sterilized, and contain less than 20 endotoxin units per device as determined by the limulus amebocyte lysate (LAL) assay, and are particularly suitable for use in procedures where prolonged strength retention is necessary, and can include one or more bioactive agents. The implants may be made from fibers and meshes of poly(butylene succinate) and copolymers thereof, or by 3d printing molding, pultrusion or other melt or solvent processing method. The implants, or the fibers preset therein, may be oriented. These coverings and receptacles may be used to hold, or partially/fully cover, devices such as pacemakers and neurostimulators. The coverings, receptacles and implants described herein, may be made from meshes, webs, lattices, non-wovens, films, fibers, foams, molded, pultruded, machined and 3D printed forms.

Abstract: Resorbable implants, coverings and receptacles comprising poly(butylene succinate) and copolymers thereof have been developed. The implants are preferably sterilized, and contain less than 20 endotoxin units per device as determined by the limulus amebocyte lysate (LAL) assay, and are particularly suitable for use in procedures where prolonged strength retention is necessary, and can include one or more bioactive agents. The implants may be made from fibers and meshes of poly(butylene succinate) and copolymers thereof, or by 3d printing molding, pultrusion or other melt or solvent processing method. The implants, or the fibers preset therein, may be oriented. These coverings and receptacles may be used to hold, or partially/fully cover, devices such as pacemakers and neurostimulators. The coverings, receptacles and implants described herein, may be made from meshes, webs, lattices, non-wovens, films, fibers, foams, molded, pultruded, machined and 3D printed forms.

Abstract: An electronic device includes an image sensor configured to receive light that is incident on the electronic device through a lens and generate image data, a gyroscope configured to generate rotation motion data of the electronic device, and an image stabilizer configured to generate translation motion data of the electronic device based on the image data received from the image sensor and to generate a stabilized image by compensating for a motion of the electronic device while capturing the image, such as vibration of a handheld device. The stabilized image is generated based on filtered translation motion data obtained by performing a first filtering operation on the translation motion data and filtered rotation motion data obtained by performing a second filtering operation on the rotation motion data received from the gyroscope.

Abstract: A pixel circuit includes a sensing circuit, a gray-scale control circuit and a light-emitting switch circuit; the sensing circuit is configured to charge and discharge a sensing capacitor when a sensing capacitor is formed by a touch object and an anode layer of OLED; the gray-scale control circuit is configured to control the light-emitting intensity of the OLED; the light-emitting switch circuit is configured to control the OLED to emit light.

Abstract: An image correction method is provided. The image correction method includes receiving an input image from a first camera; receiving a guide image from a second camera; generating a corrected image by performing image correction on the input image using the guide image, the image correction being performed by an image generation unit having a pre-learned image generation parameter learned using a training image; generating a quality value of the corrected image by an image evaluation unit having an pre-learned image evaluation parameter learned using the training image; and performing the image correction on the corrected image again when the quality value of the corrected image is less than a set value, and outputting the corrected image as a final image when the quality value of the corrected image is greater than the set value.

Abstract: Resorbable implants, coverings and receptacles comprising poly(butylene succinate) and copolymers thereof have been developed. The implants are preferably sterilized, and contain less than 20 endotoxin units per device as determined by the limulus amebocyte lysate (LAL) assay, and are particularly suitable for use in procedures where prolonged strength retention is necessary, and can include one or more bioactive agents. The implants may be made from fibers and meshes of poly(butylene succinate) and copolymers thereof, or by 3d printing molding, pultrusion or other melt or solvent processing method. The implants, or the fibers preset therein, may be oriented. These coverings and receptacles may be used to hold, or partially/fully cover, devices such as pacemakers and neurostimulators. The coverings, receptacles and implants described herein, may be made from meshes, webs, lattices, non-wovens, films, fibers, foams, molded, pultruded, machined and 3D printed forms.

Abstract: Resorbable implants, coverings and receptacles comprising poly(butylene succinate) and copolymers thereof have been developed. The implants are preferably sterilized, and contain less than 20 endotoxin units per device as determined by the limulus amebocyte lysate (LAL) assay, and are particularly suitable for use in procedures where prolonged strength retention is necessary, and can include one or more bioactive agents. The implants may be made from fibers and meshes of poly(butylene succinate) and copolymers thereof, or by 3d printing molding, pultrusion or other melt or solvent processing method. The implants, or the fibers preset therein, may be oriented. These coverings and receptacles may be used to hold, or partially/fully cover, devices such as pacemakers and neurostimulators. The coverings, receptacles and implants described herein, may be made from meshes, webs, lattices, non-wovens, films, fibers, foams, molded, pultruded, machined and 3D printed forms.

Abstract: The method of the polyurethane polyol comprises (1) dissolving 2,3-epoxybutane and an acid catalyst in an inert solvent to obtain a solution A; dissolving triethylene glycol in an inert solvent to obtain a solution B; and dissolving epoxy vegetable oil in an inert solvent to obtain a solution C; (2) respectively and simultaneously pumping the solutions A and B into a first micromixer for mixing; (3) pumping the solution C and an effluent of the first microreactor into a second micromixer for mixing while carrying out step (2)?; and (4) dissolving the vegetable oil polyol in an inert solvent to obtain a solution D; dissolving epoxypropane and an alkaline catalyst in an inert solvent to obtain a solution E; and pumping the solution D and the solution E into a tank reactor for reaction, thereby obtaining the polyurethane polyol.

Abstract: An apparatus includes a first camera module providing a first image of an object with a first field of view, a second camera module providing a second image of the object with a second field of view different from the first field of view, a first depth map generator that generates a first depth map of the first image based on the first image and the second image, and a second depth map generator that generates a second depth map of the second image based on the first image, the second image, and the first depth map.

Abstract: An electronic device includes an image sensor configured to receive light that is incident on the electronic device through a lens and generate image data, a gyroscope configured to generate rotation motion data of the electronic device, and an image stabilizer configured to generate translation motion data of the electronic device based on the image data received from the image sensor and to generate a stabilized image by compensating for a motion of the electronic device while capturing the image, such as vibration of a handheld device. The stabilized image is generated based on filtered translation motion data obtained by performing a first filtering operation on the translation motion data and filtered rotation motion data obtained by performing a second filtering operation on the rotation motion data received from the gyroscope.

Abstract: A client instance provides search suggestions based on a partial search query. The search suggestions include user search suggestions based on previous search queries performed by the user and instance search suggestions based on previous search queries performed on the instance. The client instance filters the instance search suggestions based on filter criteria associated with the user, such as an interface used by the user, a search context, user group that the user belongs to, domain used by the user, and so on. The client instance may remove the search suggestions that include blacklisted terms. The client instance may rank the search suggestions (e.g., based on frequency and/or recency) and enable the user to select those ranked search suggestions that meet or exceed a threshold.

Abstract: The present disclosure provides a structured light generator. The structured light generator includes a transparent substrate, a plurality of transflective structure layers disposed on one side of the transparent substrate and mutually laminated and parallel, wherein distances between any two adjacent transflective structure layers are equal and 0.1? to 10?, ? being a wavelength of incident light, and a transparent filling layer disposed between any two adjacent transflective structure layers.

Abstract: Double-layered protective coatings for lithium metal electrodes, as well as methods of formation relating thereto, are provided. The negative electrode assembly includes an electroactive material layer including lithium metal and a protective dual-layered coating. The protective dual-layered coating includes a polymeric layer disposed on a surface of the electroactive material layer and an inorganic layer disposed on an exposed surface of the polymeric layer. The polymeric layer has an elastic modulus of greater than or equal to about 0.01 GPa to less than or equal to about 410 GPa. The inorganic layer has an elastic modulus of greater than or equal to about 10 GPa to less than or equal to about 1000 GPa.