Abstract: The present disclosure discloses a speaker box including a housing having a receiving space, and a speaker unit mounted on the housing and dividing the receiving space into a front chamber and a rear chamber isolated from each other; a support member is received in the rear chamber, including a first fixation portion fixed to the speaker unit, a second fixation portion fixed to the housing, and a support portion connecting the first fixation portion and the second fixation portion; a sound hole is provided on the housing configured to connect the front chamber with outside; the first fixation portion is fixed to a yoke; the speaker box in the present disclosure has higher fixation strength and higher drop reliability.

Abstract: A speaker box and an electronic device are disclosed. The speaker box includes an upper cover plate including side walls, a first lower cover plate, a speaker unit, a motor module, and second lower cover plates. The speaker unit divides an accommodating cavity defined by upper cover plate and first lower cover plate into front and back cavities. The second lower cover plates are assembled with the upper cover plate to define compensation cavities. A length of at least one of the side walls of the upper cover plate is greater than that of an orthographic projection thereof, so the speaker box is suitable for various electronic devices and has strong adaptability and wide application. The compensation cavities are communicated with the back cavity, which increases an overall space of the back cavity, improves low-frequency performance of the speaker unit, and improves sound production effect of the speaker unit.

Abstract: A speaker box includes an upper cover plate, a lower cover plate, a speaker unit, and a motor module. The lower cover plate is assembled with the upper cover plate to define an accommodating cavity for accommodating the speaker unit and the motor module. The speaker unit divides the accommodating cavity into a front cavity and a rear cavity. The motor module is disposed on one side of the speaker unit. The upper cover plate includes a top wall and side walls. A length of at least one of the side walls is greater than a length of an orthographic projection thereof. Edge areas of the upper cover plate and edge areas of the lower cover plate are assembled to define compensation cavities. The lower cover plate is of a single metal sheet structure. Therefore, low-frequency performance of the speaker box is improved.

Abstract: The present disclosure discloses a speaker box including a housing having a receiving space and a speaker unit received in the receiving space. The housing and the speaker unit encloses a front cavity and a rear cavity isolated from each other. A mesh disposed in the rear cavity is configured to enclose a filling chamber with the bottom cover for filling sound-absorbing particles. A steel sheet of the bottom cover includes a protrusion connected to the mesh. And, a damping member opposite to the protrusion is sandwiched between the mesh and the yoke; the speaker box in the present disclosure has higher drop reliability.

Abstract: A speaker box and an electronic device include an upper cover plate, a lower cover plate, a speaker unit, and a motor module. The speaker box define an accommodating cavity for accommodating the speaker unit and the motor module. The speaker unit divides the accommodating cavity into a front cavity and a rear cavity. The motor module is disposed on one side, distal from the upper cover plate, of the speaker unit. The upper cover plate includes a top wall and side walls. A length of at least one of the side walls of the upper cover plate is greater than a length of orthographic projection of the at least one of the side walls thereof. Edge areas of the upper cover plate and edge areas of the lower cover plate are assembled to define compensation cavities. Therefore, low-frequency performance of the speaker box is improved.

Abstract: The present invention provides a bending foam assembly and a speaker box including the bending foam assembly. The bending foam assembly includes a foam layer, a first back adhesive layer, an air-permeable isolation layer, and a second back adhesive layer sequentially. The bending foam assembly further includes a third back adhesive layer and a metal foil layer disposed between the foam layer and the first back adhesive layer. The bending foam assembly mounted on a housing of the speaker box through the second back adhesive layer. The bending foam assembly of the present invention avoids the problem of warping in application by adding the metal foil layer.

Abstract: The present disclosure relates to a flame retardant composed of multi-component phase change material particles. These particles consist of paraffin wax, nano-flame retardant, and conventional flame retardant. The phase change material is modified with nano-flame retardant and physically coated with conventional flame retardant. The multi-component phase change material flame retardant is formed by creating a two-layer nucleus-shell structure. The nucleus core is made up of the conventional flame retardant, while the shell layer is composed of the nano-flame retardant doped phase change material. The multi-component flame retardant material combines the performance advantages of phase change material, nano flame retardant, and conventional flame retardant. The combination of nano flame retardant and phase change material weakens the disadvantages of phase change material and allows for the full utilization of the energy storage capabilities of the phase change material.

Abstract: Disclosed are a culture medium and a culture method for in vitro expansion of primary cells of intestinal cancer. The culture medium comprises an initial culture medium, a Rho protease inhibitor, an antibiotic, gastrin, A8301, a non-essential amino acid, cholera toxin, an insulin-like growth factor-1, nicotinamide, insulin, fetal bovine serum, and an additive selected from at least one of a B27 additive and an N2 additive. By using the culture medium, effective and rapid expansion of the primary cells of intestinal cancer can be achieved. The expanded cells maintain the pathological characteristics of patients, and the culture success rate and the cell expansion rate of the primary cells of intestinal cancer are improved, which provide a research foundation for personalized treatment of the patients.

Abstract: A bottom cylinder for a high-temperature and high-pressure environment simulator of a high-fidelity corer is provided. The bottom cylinder includes a cylinder barrel. The bottom of the cylinder barrel is provided with a cylinder base. The piston is provided inside the cylinder barrel and divides an inner cavity of the cylinder barrel into a rodless cavity and a rod cavity. The piston is provided with a piston rod. The outer wall of the cylinder barrel is provided with an oil inlet hole communicated with the rodless cavity, an oil outlet hole communicated with the rod cavity, and a reserved hole. The lower end surface of the piston is provided with a first buffer ring, and the upper surface of the cylinder base is provided with a second buffer ring mated with the first buffer ring. The bottom cylinder is applied to the simulator for oil and gas resource exploitation.

Abstract: The disclosure relates to the field of underground salt cavern energy storage, and discloses a coupling numerical simulation method for site selection of an underground salt cavern hydrogen storage, which specifically comprises the following. Geological data of an area where the salt cavern hydrogen storage is to be established is obtained. A three-dimensional model is established and grid meshing is performed. An initial coupling field is established and balanced based on the geological model, and then excavation simulation of the salt cavern hydrogen storage is performed. A geological model after excavation and related parameter values thereof are imported into TOUGH2MP software, a stress model in FLAC3D software is coupled with hydraulic and thermal models in the TOUGH2MP software to simulate a stress, hydraulic, and thermal coupling behavior process of rock layers around the salt cavern hydrogen storage in the area, and a coupled simulation result is obtained.

Abstract: The present disclosure relates to compounds and compositions for inhibition of RAF serine/threonine protein kinases and inhibition of Bcr-Abl tyrosine kinases, methods of preparing said compounds and compositions, and their use in the treatment of various cancers, such as melanoma, non-small cell lung cancer, and chronic myeloid leukemia (CML).

Abstract: A high-temperature and high-pressure simulator for a deep in-situ environment is provided. The simulator includes a high-fidelity sample chamber, where a lower end of the high-fidelity sample chamber is provided with a bottom cylinder. A lower end of the bottom cylinder is provided on a base. A piston rod of the bottom cylinder extends into the high-fidelity sample chamber, and an upper end of the piston rod is provided with a rock sample seat. An upper end of the high-fidelity sample chamber is provided with a rock sample cap. The top of the high-fidelity sample chamber is sealed by an end cap of the high-fidelity sample chamber. An upper end of the end cap of the high-fidelity sample chamber is provided with a multi-section coring drill chamber. The uppermost section of the coring drill chamber is connected to a lift cylinder.

Abstract: The invention provides an optical coherence tomography self-testing system, an optical coherence tomography method and an ocular disease monitoring system. The optical coherence tomography self-testing system comprises a camera device, an external display module and a communication module. The camera device includes an image-capturing module and a processing module. The image-capturing module captures a plurality of ocular images. The processing module is connected to the image-capturing module, and the processing module determines whether a position offset value between the pupil center position of a tested eyeball and an optical axis of the image-capturing module is within a preset error range. If the position offset value is within the preset error range, the plurality of ocular images is stored as a plurality of displayed images. The external display module displays one of the plurality of displayed images and a status light after the image-capturing module has completed image capturing.

Abstract: A signal resource measurement method and a terminal are provided. The method includes: measuring a first signal resource of a target cell, to obtain a first measurement; and when the first measurement satisfies a first preset condition, measuring a second signal resource of the target cell, to obtain a second measurement; where the second signal resource is different from the first signal resource.

Abstract: The present disclosure provides a method for increasing a number of proteins and/or peptides identified, including: S1. adding a binding buffer and an aluminosilicate zeolite to a sample to be tested to obtain a first suspension; S2. incubating the first suspension, subjecting an incubated first suspension to first high-speed centrifugation to obtain a first supernatant and a first precipitate, discarding the first supernatant, and retaining the first precipitate; S3. repeating a process as follows several times: resuspending the first precipitate with a washing buffer to obtain a second suspension, subjecting the second suspension to second high-speed centrifugation to obtain a second supernatant and a second precipitate, discarding the second supernatant, and retaining the second precipitate; and S4. preparing the second precipitate into a protein sample, and subjecting the protein sample to mass spectrometry detection.

Abstract: Disclosed is a method for preparing a composite loaded with nano-magnesium hydride, including: adding a cationic surfactant into an aqueous dispersion of a two-dimensional transition metal carbide such that a nanosheet of the two-dimensional transition metal carbide wrinkles, to avoid re-stacking, and then washing and drying; placing a dried product into a sealed container, vacuuming the sealed container, heating to a high temperature, and holding at the high temperature for a period of time; filling the sealed container with high-pressure hydrogen and holding for a period of time to obtain a heated product; adding the heated product and dibutyl magnesium into an organic solvent, conducting ultrasonic dispersion, then heating under stirring at a hydrogen pressure of 3 MPa to 6 MPa and a temperature of 180° C. to 220° C. for 12 h to 48 h, and centrifuging and drying to obtain the composite loaded with nano-magnesium hydride.

Abstract: Provided herein are compounds and compositions for selective inhibition of PARP1 over PARP2, methods of preparing said compounds and compositions, and their use in the treatment of various cancers, such as pancreatic, prostate, bladder, endometrial, lung, colorectal, ovarian, peritoneal, or breast cancer.

Abstract: A sound device includes: a frame, a first vibration system, a magnetic circuit system, and a second vibration system. The magnetic circuit system includes a first magnetic conductive plate, a main magnetic steel, first side magnetic steels, second side magnetic steels, and second magnetic conductive plates. The first magnetic conductive plate includes a magnetic conductive plate body, side plates, and fixing plats. The main magnetic steel, the first side magnetic steels, and the side plates are enclosed to define a first magnetic gap. The second magnetic conductive plates are disposed around the magnetic conductive plate body at intervals and the second magnetic conductive plates are enclosed to define a second magnetic gap. A first voice coil is inserted into the first magnetic gap. A second voice coil is inserted into the second magnetic gap. Compared with the prior art, the sound device improves acoustic performance.

Abstract: A sound device include a frame, a first vibration system, and a magnetic circuit system. The first vibration system includes a first vibrating diaphragm and a first voice coil. The magnetic circuit system includes a magnetic yoke, a main magnetic steel set, and auxiliary magnetic steel sets. One side, away from the magnetic yoke body, of each of the magnetic yoke extending portions is recessed to form positioning holes. Positioning blocks protruded from the frame are one-to-one inserted into the positioning holes for positioning, and one side, away from the magnetic yoke body, of each of the magnetic yoke extending portions at least partially abuts against the frame, so that the magnetic circuit system and the frame are assembled and positioned along a first direction and a second direction of the magnetic yoke. The sound device is easy to assemble and has excellent acoustic performance.