Abstract: The disclosure discloses a simplified space vector modulation method for multi-lever converters, and relates to the field of space vector modulation methods for multilevel converters, which solves problems that a redundant on-off state is greatly increased along with increase of a number of levels in a traditional SVM technology, and SVM is difficult to realize due to calculation of the redundant on-off state and selection of a proper on-off state. The method comprises the following steps of: step 1: establishing a vector expression; step 2: establishing a reference vector trajectory model; step 3: respectively representing reference signals and level signals by coordinate components of a reference vector and a basic vector and corresponding component sums; step 4: constructing a star-connected multilevel converter; step 5: sampling a phase voltage reference vector trajectory model of the star-connected multilevel converter, and synthesizing the reference vector.

Abstract: A proton therapy system based on a compact superconducting cyclotron, including: a superconducting cyclotron system, an energy selection system, a beam transport system, a fixed therapy room subsystem and a rotating frame therapy subsystem; a fixed-energy proton beam extracted from a superconducting cyclotron of the superconducting cyclotron system is adjusted into a continuous and adjustable proton beam of 70 MeV to 200 MeV by the energy selection system, thus realizing a longitudinal adjustment for a proton range during treating a tumor, and the continuous and adjustable proton beam is respectively transmitted to the fixed therapy room subsystem and the rotating frame therapy subsystem by the beam transport system. The cooperative control of the superconducting cyclotron system, the energy selection system, the beam transport system and the therapy head realizes the transverse expansion of proton beams, thus realizing intensity modulated radiation therapy for the tumor.

Abstract: The present invention belongs to the field of medicinal chemistry. Specifically disclosed is a class of URAT1 inhibitors for promoting uric acid excretion, which are compounds as represented by the structure of formula (I) or pharmaceutically acceptable salts thereof. Experiments show that the compounds provided by the present invention have a very good inhibitory effect on the transport of uric acid by hURAT1 in HEK293 transfected cells, and that such compounds have a good application prospect in the treatment of hyperuricemia or gout.

Abstract: A proton therapy system based on a compact superconducting cyclotron, including: a superconducting cyclotron system, an energy selection system, a beam transport system, a fixed therapy room subsystem and a rotating frame therapy subsystem; a fixed-energy proton beam extracted from a superconducting cyclotron of the superconducting cyclotron system is adjusted into a continuous and adjustable proton beam of 70 MeV to 200 MeV by the energy selection system, thus realizing a longitudinal adjustment for a proton range during treating a tumor, and the continuous and adjustable proton beam is respectively transmitted to the fixed therapy room subsystem and the rotating frame therapy subsystem by the beam transport system. The cooperative control of the superconducting cyclotron system, the energy selection system, the beam transport system and the therapy head realizes the transverse expansion of proton beams, thus realizing intensity modulated radiation therapy for the tumor.

Abstract: The invention relates to a high-performance shielding sheet, preparation method thereof and coil module comprising the same. The high-performance shielding sheet includes at least one sheet which include: at least one shielding layer with low coercive force and low remanence formed of a soft magnetic material; and at least one adhesive layer disposed on at least one side of the shielding layer; and wherein the shielding layer includes a plurality of graphical slits, and the plurality of graphical slits divide the shielding layer into a plurality of graphical fragments; and wherein the plurality of graphical slits are filled with the adhesive layer, enabling the plurality of graphical fragments to be separated from each other and have a good insulation property. The advantages include: improving the electric charging conversion rate, increasing the charging efficiency, reducing the transmission loss, and increasing the uniformity of the electromagnetic wave transmission medium.

Abstract: An image forming apparatus includes an image scanning device, which comprises: a document tray to load an original document to be scanned; a discharge tray to load the original document after being scanned; and a frame which the document tray and the discharge tray are mounted on. A conveyance path is formed inside the frame to connect the document tray and the discharge tray. The frame contains a conveying structure to convey the original document along the conveyance path; a transparent support member located below the conveyance path to support the original document; a scanning member located below the transparent support member, the scanning member having a scanning position in which the scanning member scans the original document when being located on the transparent support member; and a pressing member disposed above the transparent support member and facing the scanning member for pressing the original document onto the transparent support member.

Abstract: The present invention discloses bionic stratospheric airships, relate to the technical field of aircrafts. the hull shape of the bionic stratospheric airship is obtained by lofting the shape of physalia physalis; one or more buoyancy gasbags, one or more ballonets, and a heat regulating gasbag are provided inside the hull; the buoyancy gasbags are filled with lighter-than-air gas and are provided at an upper layer inside the hull; the ballonets are filled with air and are provided at a lower layer inside the hull; the heat regulating gasbag is provided at a middle layer inside the hull and is filled with a working medium reversibly regulated between a gas state and a liquid state; and a thermodynamic cycle device for heating or pressurizing the working medium is provided inside the heat regulating gasbag.

Abstract: The present disclosure provides a scanning device, an image-forming apparatus, and a scanning method. In one aspect, the scanning device provided by the present disclosure includes a first sensor, a second sensor, a first channel corresponding to the first sensor, a second channel corresponding to the second sensor, and a selector. The first sensor is configured to collect first image data of a to-be-scanned document. The second sensor is configured to collect second image data of the to-be-scanned document. The selector is configured to acquire image data alternately from the first channel and the second channel to acquire a pixel of the first image data from the first channel and a pixel of the second image data from the second channel by using a pixel-by-pixel acquisition mode for each of the first and second channels in one acquisition cycle.

Abstract: The present disclosure provides a scanning device, an image-forming apparatus, and a scanning method. In one aspect, the scanning device provided by the present disclosure includes a first sensor, a second sensor, a first channel corresponding to the first sensor, a second channel corresponding to the second sensor, and a selector. The first sensor is configured to collect first image data of a to-be-scanned document. The second sensor is configured to collect second image data of the to-be-scanned document. The selector is configured to acquire image data alternately from the first channel and the second channel to acquire a pixel of the first image data from the first channel and a pixel of the second image data from the second channel by using a pixel-by-pixel acquisition mode for each of the first and second channels in one acquisition cycle.

Abstract: Parallel mark processing is disclosed including traversing first objects in a virtual machine heap based on correspondences between memory blocks in the virtual machine heap and N marking threads, pushing a first pointer of a first object into a private stack of a marking thread corresponding to a memory block, the first object being located in the memory block, performing first mark processing of the first object based on a push-in condition of the first pointer, and after traversal of the first objects has been completed, launching the N marking threads to cause the N marking threads to synchronously perform mark processing used in garbage collection based on push-in conditions of first pointers in respective private stacks of the first pointers.

Abstract: An image forming apparatus includes an image scanning device, which comprises: a document tray to load an original document to be scanned; a discharge tray to load the original document after being scanned; and a frame which the document tray and the discharge tray are mounted on. A conveyance path is formed inside the frame to connect the document tray and the discharge tray. The frame contains a conveying structure to convey the original document along the conveyance path; a transparent support member located below the conveyance path to support the original document; a scanning member located below the transparent support member, the scanning member having a scanning position in which the scanning member scans the original document when being located on the transparent support member; and a pressing member disposed above the transparent support member and facing the scanning member for pressing the original document onto the transparent support member.