Abstract: Disclosed are a catalyst component and a catalyst for olefin polymerization, and an olefin polymerization method. The catalyst component comprises magnesium, titanium, a halogen and an internal electron donor, wherein the internal electron donor comprises a monocarboxylic acid ester compound and a diether compound, and the molar ratio of the monocarboxylic acid ester compound to the diether compound is (0.0035-0.7):1. By using the catalyst, a polymer having both a high isotactic index and a high melt flow index can be prepared.

Abstract: A detection method includes obtaining first count data and second count data during rotation of an encoder disc mounted at and configured to rotate together with a rotation object and determining a rotation parameter of the rotation object according to the first count data and the second count data. The encoder disc includes N detection target portions arranged along a circumferential direction of the encoder disc. The N detection target portions include N?K first detection target portions and K second detection target portions. Along the circumferential direction of the encoder disc, a width of one of the N?K first detection target portions is different from a width of one of the K second detection target portions. The first count data is obtained when one detection target portion of the N detection target portions is detected. The second count data is recorded between two neighboring detection target portions.

Abstract: The present application discloses a traffic monitoring method, an apparatus, a device, and a storage medium, relates to fields of autonomous driving, intelligent transportation, big data. The specific implementation is: acquiring road condition information and/or vehicle state information collected by a terminal device, where the terminal device is at least one of an unmanned vehicle and an unmanned aerial vehicle; performing a data analysis on the road condition information and/or the vehicle state information, and identifying a traffic event. Through the above procedure, monitoring efficiency of the traffic state is improved.

Abstract: A scan mechanism of a ranging apparatus includes a plurality of optical elements, a plurality of motors, and a controller or a plurality of controllers. The plurality of motors correspond to the plurality of optical elements. A motor includes a hollow rotor. An optical element is arranged at the rotor of a corresponding motor. The controller controls the plurality of motors. At least one of the plurality of controllers controls at least two of the plurality of motors. When one controller controls at least two motors, the controller controls the at least two motors to rotate at a predetermined angle difference based on a first synchronization strategy. When one controller controls one motor, the controller controls the motor and another at least one motor to rotate at the predetermined angle difference based on a second synchronization strategy.

Abstract: A structure having imbedded array of components is described. An example structure includes an imbedded component array layer having an array of imbedded passive devices contained therein. The structure further includes an Integrated Fan-Out (InFO) layer residing adjacent a first surface of the imbedded component array layer having traces and vias formed therein. The structure further includes an insulator layer residing adjacent a second surface of the imbedded component array layer and electrically coupled to at least the InFO layer and vias passing through the imbedded component array layer and electrically coupled to some of vias of the InFO layer.

Abstract: The invention discloses a method for simulating the discontinuity of the hydraulic fracture wall in fractured reservoirs, comprising the following steps: establish a physical model of the natural fracture; establish a hydraulic fracture propagation calculation equation; establish a natural fracture failure model, calculate the natural fracture aperture, and then calculate the natural fracture permeability, and finally convert the natural fracture permeability into the permeability of the porous medium; couple the hydraulic fracture propagation calculation equation with the permeability of the porous medium through the fracture propagation criterion and the fluid loss to obtain a pore elastic model of the coupled natural fracture considering the influence of the natural fracture; work out the stress and displacement distribution of the hydraulic fracture wall with the pore elastic model of the coupled natural fracture, and analyze the offset and discontinuity of the hydraulic fracture wall according to the dis

Abstract: Disclosed are techniques for scanning an optical beam in two dimensions (e.g. azimuth and elevation) and for increasing or decreasing a field-of-view (FOV) of the scanned beam. Scanning may be performed by various configurations of prisms, rotatable mirrors, and/or rotatable polygonal mirrors. In some configuration, changes to the FOV of the scanned beam may be performed by prisms positioned with a predetermined angular relationship and may include other optical components, as well. Depending on the predetermined angular relationship, the prisms can expand the FOV along one or more axis and/or may compress the FOV along one or more axis.

Abstract: The present invention provides a DNA barcode and method for identifying cuttlefishes, mainly depending on the diversity of mitochondrial DNA, including designing universal primers on conservative regions on both sides of the species-specific variable region, amplifying DNA from cuttlefishes, and sequencing PCR products to obtain DNA sequences, and identifying cuttlefish species based on the similarity by comparing with the species information in the database. The method is advantageous in that it can achieve efficient and specific amplification of DNA from such cephalopods as cuttlefishes, with low requirements for necessary instruments and simple operation processes. In addition, the method can be carried out in most molecular biology laboratories, which greatly improves the probability of success of molecular identification for cuttlefishes and sibling species thereof.

Abstract: This application provides an object recognition method and apparatus, and a storage medium, and relates to the technical field of image recognition. The object recognition method includes: receiving an image of an object to be recognized; inputting the image of the object to be recognized into a pre-trained image feature extractor to obtain a first feature vector of the image of the object to be recognized; and determining category information of the object to be recognized according to the first feature vector of the image of the object to be recognized as well as image feature vectors in an image database, wherein the image database includes image information of a plurality of objects.

Abstract: The present disclosure provides a distance detection device. The distance detection device includes a light source configured to emit pulse light beams sequentially; and a scanning module including a first optical module, a second optical module, and drivers. The first optical module and the second optical module are sequentially positioned on an optical path of the light beams emitted by the light source, the drivers drive the first optical module and the second optical module to move to sequentially project the light beams emitted by the light source to different directions and form a strip-shaped scanning range after being emitted from the scanning module.

Abstract: The present disclosure relates to an FPGA-based dynamic graph processing method, comprising: where graph mirrors of a dynamic graph that have successive timestamps define an increment therebetween, a pre-processing module dividing the graph mirror having the latter timestamp into at least one path unit in a manner that incremental computing for any vertex only depends on a preorder vertex of that vertex; an FPGA processing module storing at least two said path units into an on-chip memory directly linked to threads in a manner that every thread unit is able to process the path unit independently; the thread unit determining an increment value between the successive timestamps of the preorder vertex while updating a state value of the preorder vertex, and transferring the increment value to a succeeding vertex adjacent to the preorder vertex in a transfer direction determined by the path unit, so as to update the state value of the succeeding vertex.

Abstract: A method for generating a preview associated with a media file is provided. The method may include receiving a plurality of social comments associated with a plurality of frames corresponding to the media file. The method may also include storing the received plurality of social comments in a repository, whereby the received plurality of social comments is stored with a frame marker. The method may further include analyzing the stored plurality of social comments. The method may additionally include classifying the analyzed plurality of social comments according to at least one sentiment and at least one keyword in the media file.

Abstract: The invention discloses a method for predicting the optimal shut-in duration by coupling fluid flow and geological stress, comprising the following steps: determine basic parameters; obtain the fracture length, fracture width and reservoir stress distribution based on the basic parameters; calculate the oil saturation, pore pressure, and permeability and porosity after coupling change in different shut-in durations on the basis of the principle of fluid-solid coupling; take the oil saturation, pore pressure, and permeability and porosity obtained in Step 3 as initial parameters and calculate the production corresponding to different shut-in time on the basis of the productivity model; finally select the optimal shut-in time based on the principle of fastest cost recovery. The present invention can accurately predict the optimal shut-in duration after fracturing to improve the oil and gas recovery ratio in tight oil and gas reservoirs with difficulty in development and low recovery.

Abstract: A high-power Voltage Regulator Module (VRM) includes a housing having side walls, an upper opening, and a lower opening, a VRM circuit board oriented within the housing, a plane of the VRM circuit board oriented in parallel to at least one of the side walls of the housing, an upper Printed Circuit Board (PCB) coupled to the upper opening of the housing, a lower panel coupled to the lower opening of the housing, a coolant inlet port formed in the lower panel, and a coolant outlet port formed in the lower panel. The high power VRM may include a coolant inlet adapter coupled to the coolant inlet port and a coolant outlet adapter coupled to the coolant outlet port. The coolant inlet adapter and the coolant outlet adapter may provide support for the VRM.

Abstract: Disclosed is a catalyst pre-contact method for the continuous polymerization of an olefin, wherein a primary catalyst, a co-catalyst and, optionally, an external electron donor are mixed and then undergo a pre-contact reaction, with the pre-contact reaction temperature being ?30° C. to 35° C. and adjustable, and the pre-contact reaction time being 0.5 min to 10 min and adjustable, and the pre-contacted catalyst is brought into a catalyst prepolymerization system and then into a catalyst polymerization system, or is directly brought into the catalyst polymerization system. Further disclosed is a catalyst pre-contact device for the continuous polymerization of an olefin, which can adjust the pre-contact time and pre-contact temperature of the catalyst so that the performance of the catalyst achieves a better level according to the process.

Abstract: A method for recovering CO2 in the Rectisol process. The method includes at least the following steps: performing reduced-pressure flash distillation treatment on the CO2-rich methanol liquid, and outputing the CO2 desorbed gas obtained after the reduced-pressure flash distillation treatment as a product gas; performing heat exchange flash distillation treatment on a first methanol treatment liquid obtained after the reduced-pressure flash distillation treatment, and outputing the CO2 desorbed gas obtained after the heat exchange flash distillation treatment as a product gas; performing vacuum flash distillation treatment on a second methanol treatment liquid obtained after the heat exchange flash distillation treatment, and outputing the CO2 desorbed gas obtained after the vacuum flash distillation treatment as a product gas.

Abstract: An aqueous composition comprising a cellulose ether acetate being at least partially dissolved in an aqueous liquid is produced in a process, wherein an aqueous liquid is mixed with a cellulose ether acetate having a degree of substitution of acetyl groups, DSAc, of from 0.05 to 0.75 and the temperature of the mixture of the cellulose ether acetate and the aqueous liquid is set to less than 10 C to at least partially dissolve the cellulose ether acetate in the aqueous liquid.

Abstract: This invention relates to a method of preparing inhibitors of glucosylceramide synthase (GCS) useful for the treatment metabolic diseases, such as lysosomal storage diseases, either alone or in combination with enzyme replacement therapy, and for the treatment of cancer.

Abstract: The present disclosure relates to composite powders and methods for forming said composite powders thereof. In particular, the present disclosure relates to composite powder comprising nanoparticles on a surface of a metal particle and methods for forming said composite powders. The present disclosure also relates to composites obtained according to methods as defined herein and a method of forming said composite.

Abstract: A high-power Voltage Regulator Module (VRM) includes a housing having side walls, an upper opening, and a lower opening, a VRM circuit board oriented within the housing, a plane of the VRM circuit board oriented in parallel to at least one of the side walls of the housing, an upper Printed Circuit Board (PCB) coupled to the upper opening of the housing, a lower panel coupled to the lower opening of the housing, a coolant inlet port formed in the lower panel, and a coolant outlet port formed in the lower panel. The high power VRM may include a coolant inlet adapter coupled to the coolant inlet port and a coolant outlet adapter coupled to the coolant outlet port. The coolant inlet adapter and the coolant outlet adapter may provide support for the VRM.