Abstract: Provided are a sound gathering device for voiceprint monitoring and a preparation method. The sound gathering device is a cone structure and includes a front end portion (1) and a rear end portion (2), the front end portion (1) is trumpet-shaped, an inner wall surface of the front end portion (1) is present a pattern array of a microstructure (3), and the microstructure (3) presenting the pattern array is formed through laser etching. A sound wave frequency monitored by the sound gathering device is 50 Hz˜10 kHz, and a sound wave enters the sound gathering device from an entrance of the front end portion (1), is reflected through the pattern array of the microstructure (3) on the inner wall surface of the front end portion (1), and is transmitted from an exit of the rear end portion (2), and a sound pressure of the exit of the rear end portion (2) is 4 times˜8 times a sound pressure of the entrance of the front end portion (1).

Abstract: A method may include obtaining an image of a subject and determining a plurality of image blocks in the image. The method may also include extracting grayscale features from each of the plurality of image blocks and determining, based on the grayscale features, a segmentation threshold. The method may further include segmenting, based on the segmentation threshold, the image.

Abstract: The present disclosure provides a method for automated image acquisition and imaging processing. The method may include obtaining imaging information of an object. The method may include determining, based on the imaging information, at least target device positioning information of an imaging device. The method may include causing, based on the target device positioning information of the imaging device, the imaging device to be positioned to perform the image acquisition. The method may include providing, based on the inspection information, guidance information, the guidance information being configured to guide positioning of the object. The method may also include obtaining a target image from an imaging operation by the imaging device. Further, the method may include determining a target image processing algorithm of a medical image.

Abstract: Disclosed are compounds of Formula I, methods of using the compounds for inhibiting KRAS activity and pharmaceutical compositions comprising such compounds. The compounds are useful in treating, preventing or ameliorating diseases or disorders associated with KRAS activity such as cancer.

Abstract: This application discloses an ability aiming method in a three-dimensional virtual environment performed at a computer device. The method includes: displaying a user interface (UI) of an application program, the UI including a virtual environment picture obtained by observing the three-dimensional virtual environment from the perspective of a third-person point of view; receiving a drag operation on an ability aiming control in the UI, the drag operation from a first operating point and a second operating point that are located on the ability aiming control, the first operating point being an initial operating point and the second operating point being a current operating point of the drag operation; and displaying a three-dimensional ability aiming indicator in the virtual environment picture in response to the drag operation, an ability aiming direction of the three-dimensional ability aiming indicator being parallel to a drag direction of the drag operation in the UI.

Abstract: This application discloses techniques of playing videos. The techniques comprise caching a video resource of a target onto a plurality of content delivery network (CDN) nodes; establishing a long link with each of a plurality of client computing devices in response to detecting that the plurality of client computing devices access a playback page of the target video; simultaneously sending, via the established long links, signals indicative of a start state of the target video to all of the plurality of client computing devices, wherein each of the plurality of client computing devices simultaneously plays the video resource while separately obtaining the video resource from a corresponding CDN node; simultaneously sending, via the established long links, signals indicative of an end state of the target video to all of the plurality of client computing devices that access the playback page.

Abstract: The present disclosure relates to systems and methods for image reconstruction. The systems may obtain one or more projection images of an object and a first reconstruction image corresponding to the one or more projection images. The systems may determine, for each of the one or more projection images, an initial range of a target region on the projection image based on the first reconstruction image. The target region may be a low-gray region generated on the projection image by a substance with an X-ray attenuation coefficient greater than a predetermined threshold. The systems may determine, within the initial range, the target region on the projection image. The systems may generate a three-dimensional (3D) image of the object based at least on target regions corresponding to the one or more projection images.

Abstract: This application provides a virtual object control method performed by a computer device. The method includes: displaying a virtual battle interface; obtaining a first operation signal corresponding to a function triggering control; and receiving a first trigger operation on the function triggering control, and determining a first virtual object in the multiple virtual objects as an attack target based on operation information of the first trigger operation, the operation information being information obtained based on an activated target aiming function associated with the function triggering control; and keeping the first virtual object as the attack target when no other virtual object is determined as the attack target within a preset target duration in which the first virtual object is in a lost state.

Abstract: A semiconductor device and a method of fabricating the semiconductor device are disclosed. The method includes: providing a device wafer and a carrier wafer, the device wafer including an SOI substrate comprising, stacked from the bottom upward, a lower substrate, a buried insulator layer and a semiconductor layer; bonding the device wafer at a front side thereof to the carrier wafer; removing at least the lower substrate through thinning the device wafer from a backside thereof, wherein the backside of the device wafer opposes the front side thereof; and providing a high-resistance substrate and bonding the device wafer at the backside thereof to the high-resistance substrate, the high-resistance substrate having a resistivity higher than that of the lower substrate. With the present disclosure, lower signal loss and improved signal linearity can be achieved while avoiding a significant cost increase.

Abstract: A source base station receives a first data packet from a core network device; a target base station receives a second data packet from the core network device, where the second data packet is a duplicate of the first data packet, and the first data packet and the second data packet each include a first index; the source base station sends first indication information to the target base station, where the first indication information indicates a mapping relationship between the first index and a second index; the source base station sends a third data packet to a user equipment UE in response to the first data packet; the target base station sends a fourth data packet to the UE in response to the second data packet, where the third data packet and the fourth data packet each include the second index.

Abstract: An inducer for reprogramming a T cell into an NK-like cell and an application of the inducer. The inducer comprises any one of or a combination of at least two of a DNA methyltransferase inhibitor, a histone deacetylase inhibitor, or a histone methyltransferase EZH2 inhibitor. The inducer is used for inducing a decrease in methylation level in T cells, inhibiting histone deacetylation and histone methylation, and expressing NK cell receptors and cytokines, thereby achieving the purpose of in-vitro reprogramming of T cells into NK-like cells. The method is simple, high in efficiency, and short in cycle, and the prepared NK-like cells have obvious in-vitro killing effects, and have important significance in the field of cell immunotherapy.

Abstract: This application discloses a wireless charging receiver and a wireless charging method. The method includes: receiving, by using a first oscillation circuit, pulse energy emitted by a transmitter, where the first oscillation circuit includes a first receiving coil configured to convert the pulse energy and output power; when a voltage value output by the first oscillation circuit reaches a first reference voltage value, sending a power transfer instruction to the transmitter, so that the transmitter emits energy according to the power transfer instruction, where the first reference voltage value is a working voltage threshold of a processor; and receiving, by using a second oscillation circuit, the energy emitted by the transmitter according to the power transfer instruction.

Abstract: Provided in the present invention is a solid catalyst component for use in olefin polymerisation, comprising Mg, Ti, a halogen, and at least one electron donor, the electron donor being a 2-substituted amino-phenyl ester compound selected from general formula (I). Also disclosed in the present invention are a catalyst comprising the solid catalyst component, and an application for the catalyst in olefin polymerisation, particularly in propylene polymerization. Also provided in the present invention is a high activity catalyst, said catalyst being able to obtain polypropylene of high isotacticity and wide molecular weight distribution, and not requiring an external electron donor to obtain high isotacticity polypropylene; during polymerization, Al/Ti and Al/Si are reduced, the polymerization time is lengthened, and high activity can still be maintained, suitable for producing low-ash polymers.

Abstract: Provided is an alkoxy magnesium supported olefin polymerization catalyst component, comprising the reaction products of the following components: at least one alkoxy magnesium compound of Mg(OR1?)N(OR2?)2-N, at least one titanium compound of general formula Ti(OR)nX4-n, at least one ortho-phenylene diester electron donor compound a, and at least one diether electron donor compound b, wherein the molar ratio of a to b is 0.05 to 20. The catalyst component has an ultrahigh polymerization activity when used for olefin polymerization, and does not require the use of an external electron donor, but can also obtain a polymer with a high isotacticity, and the resulting polymer has a relatively wide molecular weight distribution and a relatively low ash content.

Abstract: A method of making an olefin polymerization catalyst carrier with a general structure formula of Mg(ORI)n(ORII)2-n, wherein: 0?n?2, and RI and RII can be the same or different and are each independently selected from a C1-C20 hydrocarbon group by reacting an alcohol with a metal magnesium powder under the protection of nitrogen in the presence of a halogen or a halogen-containing compound to obtain a first product, and subjecting the product to a treatment pressure of from 0.2 to 5.0 MPa at a treatment temperature of from 80 to 200° C. for a duration of between 2 minutes and 6 hours. Also provided is a method of making an olefin polymerization solid catalyst component which includes the catalyst carrier, a titanium compound, and at least one electron donor compound.

Abstract: Provided in the present invention is a solid catalyst component for use in olefin polymerisation, comprising Mg, Ti, a halogen, and at least one electron donor, the electron donor being a 2-substituted amino-phenyl ester compound selected from general formula (I). Also disclosed in the present invention are a catalyst comprising the solid catalyst component, and an application for the catalyst in olefin polymerisation, particularly in propylene polymerization. Also provided in the present invention is a high activity catalyst, said catalyst being able to obtain polypropylene of high isotacticity and wide molecular weight distribution, and not requiring an external electron donor to obtain high isotacticity polypropylene; during polymerization, Al/Ti and Al/Si are reduced, the polymerization time is lengthened, and high activity can still be maintained, suitable for producing low-ash polymers.

Abstract: Provided is an alkoxy magnesium supported olefin polymerization catalyst component, comprising the reaction products of the following components: at least one alkoxy magnesium compound of Mg(OR1?)N(OR2?)2-N, at least one titanium compound of general formula Ti(OR)nX4-n, at least one ortho-phenylene diester electron donor compound a, and at least one diether electron donor compound b, wherein the molar ratio of a to b is 0.05 to 20. The catalyst component has an ultrahigh polymerization activity when used for olefin polymerization, and does not require the use of an external electron donor, but can also obtain a polymer with a high isotacticity, and the resulting polymer has a relatively wide molecular weight distribution and a relatively low ash content.

Abstract: A method of making an olefin polymerization catalyst carrier with a general structure formula of Mg(ORI)n(ORII)2-n, wherein: 0?n?2, and RI and RII can be the same or different and are each independently selected from a C1-C20 hydrocarbon group by reacting an alcohol with a metal magnesium powder under the protection of nitrogen in the presence of a halogen or a halogen-containing compound to obtain a first product, and subjecting the product to a treatment pressure of from 0.2 to 5.0 MPa at a treatment temperature of from 80 to 200° C. for a duration of between 2 minutes and 6 hours. Also provided is a method of making an olefin polymerization solid catalyst component which includes the catalyst carrier, a titanium compound, and at least one electron donor compound.

Abstract: Provided is an olefin polymerization catalyst carrier with a general structure formula of Mg(ORI)n(ORII)2-n, wherein: 0?n?2, and RI and RII can be the same or different and are each independently selected from a C1-C20 hydrocarbon group. In the X-ray diffraction pattern of the catalyst carrier, there are a set of diffraction peaks in the range of a 2? diffraction angle of 5°-15°, and the set of diffraction peaks contain 1-4 main diffraction peaks. Also disclosed is an olefin polymerization solid catalyst component which is prepared from the carrier Mg(ORI)n(ORII)2-n, a titanium compound, and at least one electron donor compound. In addition, also disclosed is an olefin polymerization catalyst containing the solid catalyst component, at least one organic aluminum compound, and optionally, an external electron donor compound.