Abstract: A holder and an electronic component are provided. The holder is formed of an elastic material and is configured to hold an object. The holder includes a first surface configured to mount the holder onto a mounting surface of a member; and a second surface opposite the first surface. At least one groove configured to hold the object is formed on the second surface. The holder is configured such that a size of an opening of the groove on the second surface becomes smaller, as the first surface deforms.

Abstract: Disclosed herein is a positive electrode active material with a combination of large and small particles, including large-particle secondary spheres and small-particle secondary spheres, where the mass ratio of the large-particle secondary spheres is not smaller than 50%; the D50 particle size of the large-particle secondary spheres is 10-20 ?m, and the D50 particle size of the small-particle secondary spheres is 2-5 ?m. The doping elements and nickel contents of large and small particles are strictly regulated to ultimately obtain a positive electrode material with good comprehensive performance in terms of capacity, cycling, and DCR. Also disclosed herein is a preparation method for the positive electrode active material with a combination of large and small particles.

Abstract: A storage method includes: calculating M check blocks of N first data blocks based on a first erasure coding (EC) technology; respectively storing the N first data blocks and the M check blocks of the N first data blocks into (N+M) storage nodes in a storage system; updating the first EC technology to a second EC technology; calculating R check blocks of S second data blocks based on the second EC technology, where S is greater than N, a ratio of S to R is greater than a ratio of N to M, S, R, N, and M are all positive integers, and the second data block is a data block received after the first EC technology is updated to the second EC technology.

Abstract: A compound of formula (I) for regulating and controlling the activity of 15-PGDH, or a stereoisomer, tautomer or mixture thereof, or a pharmaceutical salt, solvate or prodrug thereof, a pharmaceutical composition containing same and the use thereof in the inhibition of the activity of 15-PGDH.

Abstract: The invention provides a moisture-proof L-?-glycerylphosphorylcholine and a preparation method thereof. Through the auxiliary material selection and preparation method treatment of raw materials, the problems of strong moisture absorption and deliquescence of L-?-glycerylphosphorylcholine when exposed to air are solved, and the excellent moisture-proof and deliquescence-resistant effects are achieved, which improves the stability of L-?-glycerylphosphorylcholine and brings high applicability to users.

Abstract: A compound of formula (I) capable of inhibiting plasmin activity, delaying fibrinolysis, and having coagulation and hemostatic activity, pharmaceutically acceptable salts, hydrates, isomers, prodrugs and mixtures thereof, wherein X, and R1 to R5 are as defined in the description.

Abstract: The present disclosure provides a height-adjustable mount, comprising a first frame assembly, a second frame assembly, a rotation assembly, and a balance assembly. The first frame assembly includes a first frame and a middle connecting plate coupled to the first frame. The first frame assembly is slidably disposed relative to the second frame assembly. Two rotation assemblies are symmetrically disposed along the first direction, and each rotation assembly includes a first rotating member and a second rotating member. The balance assembly includes two elastic members or assemblies symmetrically disposed along the first direction. Wherein the rotation assemblies enable the first frame to move up and down relative to the second frame and stop at any position under the action of an external force, and the elastic force generated by the elastic member or assembly, the first elastic member and the second elastic member is used to counteract the gravity of the load of the first frame.

Abstract: A tetrahydronaphthyridine derivative is used in preparing a medicine. The tetrahydronaphthyridine derivative is effective in preventing and treating gastrointestinal tract injury-related diseases or inhibiting gastrointestinal protein kinase.

Abstract: Disclosed are an electric patrol inspection control method and an electric patrol inspection control system based on an unmanned aerial vehicle. The method includes: formulating a flight path according to an electric patrol inspection area, collecting an image and position information, and transmitting the image and the position information to a receiving terminal of a ground station in a form of wireless transmission; obtaining analysis on defects, damages and corrosion of the electric device, processing and analyzing the image, and then obtaining analysis situations; and generating a patrol inspection electronic report, and at the same time, giving the service life, maintenance expense, maintenance measure of the electric device according to the patrol inspection electronic report, informing maintenance personnel of the position information of the electric device.

Abstract: A method for imaging tissues behind obstacles includes following steps: (1) providing an ultrasound array transducer that includes at least four active elements; (2) spraying a data sample of an ultrasound beam along an impulse response curve into an output image domain; (3) binning each point on the impulse response curve by a value of an unique attribute; (4) summing an image value at the each point on the impulse response curve into a corresponding partial image volume associated with the unique attribute; (5) repeating steps (2)-(4) for all data samples of all ultrasound beams to obtain a plurality of partial image volumes; (6) sorting the partial image volumes by the unique attribute to generate common image point gathers; and (7) obtaining an image of the tissues by stacking common image point gathers at all output locations.

Abstract: Disclosed are an electric patrol inspection control method and an electric patrol inspection control system based on an unmanned aerial vehicle. The method includes: formulating a flight path according to an electric patrol inspection area, collecting an image and position information, and transmitting the image and the position information to a receiving terminal of a ground station in a form of wireless transmission; obtaining analysis on defects, damages and corrosion of the electric device, processing and analyzing the image, and then obtaining analysis situations; and generating a patrol inspection electronic report, and at the same time, giving the service life, maintenance expense, maintenance measure of the electric device according to the patrol inspection electronic report, informing maintenance personnel of the position information of the electric device.

Abstract: A MEMS device includes a substrate, a set of spring, and a proof mass suspended above and coupled to the substrate by the springs. Each spring includes a corresponding anchor on the substrate and a beam extending away from that anchor. Each beam has a fixed end that is coupled to the anchor by a first linkage at one end of the beam proximal to the anchor and a free end that is coupled to the proof mass by a second linkage at an end of the beam that is distal to the anchor. The anchors are arranged symmetrically around a center of the proof mass. The proof mass translates vertically with respect to the substrate and when a vertical displacement of the proof mass toward the substrate reaches a predefined value, the free end of each spring contacts the substrate and prevents the proof mass from contacting the substrate.

Abstract: An electrically driven control system for a rotatable upright blast door comprises: a blast door including a door body; an opening and closing device of electric cylinder of rotatable upright door body including a drive motor module and a push rod coupled to a power output end of the drive motor module, and the opening and closing device of electric cylinder of rotatable upright door body is hinged relative to the mounting base, and the push rod is hinged to the door body. In the present invention, the opening and closing of the door body is driven by an electric cylinder structure, which has a small layout space and a large opening and closing torque. An opening and closing device of electric cylinder of rotatable upright door body has a simple structure, which reduces the complexity of maintenance and management.

Abstract: An example photoionization detector is provided. The example photoionization detector includes an insulation spacer component and a signal collection electrode component disposed on the first surface of the insulation spacer component. In some examples, the signal collection electrode component includes a first electrode layer and a second electrode layer.

Abstract: This application relates to a bicycle rack. The bicycle rack includes a column, a wheel fixing mechanism including a first locking member, a second locking member, and a locking assembly. The wheel fixing mechanism also includes a base and a wheel holder mounted on the base. The locking assembly has a first locking position that engages with the first locking member, and a second locking position that engages with the second locking member. When the locking assembly is in the first locking position, the first locking member contacts the wheel holder, causing the wheel holder to be in a clamping state. When the locking assembly is in the second locking position, the first locking member is separated from the locking assembly, placing the wheel holder in a released state, while the locking assembly engages with the second locking member.

Abstract: An error calibration method of a nitrogen-vacancy center (NV) vector magnetometer is disclosed. The method includes acquiring corresponding magnetic field intensity NV vector magnetometer measured data in various postures and constructing an error expression of the NV vector magnetometer. The error expression of the NV vector magnetometer is a relational expression among the magnetic field intensity measured data, magnetic field intensity real data and an error coefficient and the error coefficient includes a combination coefficient and a zero-bias error coefficient. All the magnetic field intensity measured data are fit based on an ellipsoid fitting method. The error coefficient is solved to obtain a determined error coefficient. The determined error coefficient is substituted into the error expression of the NV vector magnetometer to obtain an error model of the NV vector magnetometer. The magnetic field intensity measured data is substituted into the error model of the NV vector magnetometer.

Abstract: A data backup method, a medium and an electronic device are provided. The data backup method includes: generating a recovery point deletion task, where the recovery point deletion task is used to instruct to delete a target recovery point in a backup repository, and the backup repository is used to manage backup data and backup indexes corresponding to respective recovery points; and delivering the recovery point deletion task to a backup work service node, and instructing the backup work service node to determine first target data to be deleted according to a first backup index corresponding to the target recovery point, a second backup index corresponding to a preceding recovery point of the target recovery point, and a third backup index corresponding to a subsequent recovery point of the target recovery point, and delete the first target data and the first backup index from the backup repository.

Abstract: Provided are a compound of formula (I) having an effect of regulating and controlling the activity of 15-PGDH, a stereoisomer, a tautomer or a form of a mixture thereof, or a pharmaceutically acceptable salt thereof, or a solvate thereof, or a prodrug thereof, a pharmaceutical composition comprising same, and a preparation method therefor and the use thereof as a 15-PGDH inhibitor.

Abstract: An example photoionization detector is provided. The example photoionization detector includes an insulation spacer component and a signal collection electrode component disposed on the first surface of the insulation spacer component. In some examples, the signal collection electrode component includes a first electrode layer and a second electrode layer.