Abstract: A bonding structure and a power device. The bonding structure includes a first power unit and at least two bonding wires. At least one end of the bonding wire is connected to the first power unit through bonding. Projections that are of lead paths of the at least two bonding wires and that are on a preset plane have at least one intersection point. Spatial cross wire bonding is performed on the bonding wires, so that lead paths of the bonding wires form an angle with each other, thereby weakening electromagnetic force between the bonding wires. Therefore, fatigue due to fluctuating stress of the bonding wires can be alleviated, service lives of the bonding wires can be prolonged, and bonding effect can be ensured to a maximum extent.

Abstract: This application describes examples of a grid-tied inverter apparatus and a grid-tied control method. In one example, the grid-tied inverter apparatus includes an inverter circuit, a controller, and a filter circuit. The controller is configured to adjust switching frequencies of a plurality of power switching transistors based on an output current value of the inverter apparatus, to adjust a resonance frequency of the filter circuit through different resonant branches, so that the resonance frequency meets a grid-tied requirement.

Abstract: A cooling system includes a housing. A bottom of the housing has an installation position for installing a stator iron core. The cooling system further includes: an oil inlet cavity and an oil return cavity, an oil inlet and an oil outlet provided on an outer wall of the housing, an oil spraying hole and an oil return hole provided on an inner wall of the housing, and a plurality of oil diverting grooves provided at the bottom of the housing. The oil diverting grooves penetrate through the installation position. A stator component includes a stator iron core and the cooling system. An axial magnetic field motor includes the stator component.

Abstract: The invention belongs to the technical field of metal ceramics, in particular to a metal ceramic and a preparation method thereof. The hard phase is formed by at least four kinds of crystal grains with different compositions and shapes; and in the scanning electron microscope photograph of the metal ceramic, it can be observed the first hard phase comprising black titanium nitrocarbide, a thin ring and a thick ring wherein the core phase is pure black; the second hard phase in the form of a dark gray core-ring structure particles; the third hard phase in the form of a high-brightness white core-gray ring; and the fourth hard phase in the form of a homogenous gray phase and off-white core-gray ring structure particles. In addition, a white binder phase can also be observed, and the binder phase is at least one of cobalt and nickel.

Abstract: Compositions and methods disclosed herein can help provide improved delivery of non-natural therapeutic nucleotides for the treatment of diseases such as cancer. An example composition includes an assembly of amphiphilic polynucleotides, where each amphiphilic polynucleotide includes an aptamer portion, a first nucleotide portion, and a second nucleotide portion.

Abstract: A segment core and an axial flux motor. The segment core is formed by covering an SMC core (100, 100?) over an outer peripheral surface of a laminated core (200, 200?). An outer surface of the segment core, which can not be processed easily, is shaped by processing the easily shapeable SMC core (100, 100?). The entire structure of the laminated core (200, 200?) is relatively simple, and thus a mold for processing the laminated core (200, 200?) requires simpler specifications. Moreover, the mold can be used to perform processing easily, to reduce difficulties of processing the segment core. The segment core has better electromagnetic performance than a segment core solely using an SMC material, and has a higher core utilization rate than a segment core solely using a laminated core (200, 200?).

Abstract: Disclosed is a cartridge-type rivet feeding mechanism of a flow drill screwing device including a rivet box, a magazine for storing rivets from the rivet box, a rivet pulling mechanism including a rivet pulling block, a rivet pulling block guide housing and a linear driving unit connected with the rivet pulling block, a blowing mechanism including a curved connecting tube and a third air inlet, the rivet pulling block is defined with a T-shaped through hole capable of accommodating a rivet and configured for transferring the rivet from the first connecting tube to the second connecting tube. The first air inlet and the second air inlet are both configured for introducing compressed air to push the rivet to move towards the riveter head.

Abstract: A PCIe/SAS connector structure includes a female part and a male part; the female part is engaged with the male part; wherein the female part has a female plastic member, a female cover, a female signal terminal part, a fix pin and a female signal and power terminal; wherein the male part has a male plastic member, a male cover, a male signal and power terminal, a male terminal, and a fix plate; wherein the female cover is in a full-wrap structure; wherein the female cover has a protruding elastic plate, respectively; wherein the male terminal is formed in an L shape; two male terminals are fixed as a set by a plastic; the male terminal is inserted to be positioned in the male cover; wherein the male cover is formed in an L shape in a full-wrap structure. Interference performance of signal terminal is improved.

Abstract: A method for remotely shutting down a downhole unit of a rotary steering system from ground includes steps of: a: calculating a pressure difference P1 between a front end and a rear end of the drill water hole; b: calculating an extension loss ?P; c: calculating a pressure P2 at the riser after turning on the downlink device; d: calculating an opening area S1 of the throttle valve of the downlink device; and e: adjusting the throttle valve to a calculated opening degree; automatically targeting the function block that needs to be cut off according to a flow change detected downhole, and shutting down the downhole unit. The method can realize self-protection and continuous operation of the entire rotary steering system, reduce frequency of inspection that needs to pull back the drill when the rotary steering system is abnormal, improve drilling efficiency, and reduce costs.

Abstract: Disclosed in the present invention are a cooling system, a stator assembly, and an axial magnetic field motor. The cooling system is used for cooling of a stator core, comprises a housing and an enclosed cavity for containing the stator core, and further comprises: a liquid spraying cavity provided on the housing and used for containing liquid; a liquid inlet in communication with the liquid spraying cavity; a liquid outlet in communication with the enclosed cavity; and a liquid spraying assembly provided on an inner wall, corresponding to the stator core, of the housing.

Abstract: A packaged device includes a circuit board, an electronic component, and a heat storage portion. The electronic component is electrically coupled to the circuit board; and the heat storage portion is disposed on the circuit board or embedded in the circuit board, and the heat storage portion is adjacent to the electronic component, where a specific heat capacity of the heat storage portion is higher than a specific heat capacity of the circuit board, and the heat storage portion is configured to store and release heat. A heat storage material with a relatively high specific heat capacity is introduced into the packaged device, and the heat storage portion is disposed on the circuit board around the electronic component where a large amount of heat generated by the electronic component in a short time can be quickly stored in the heat storage portion and then released to the outside.

Abstract: The present invention discloses a fabrication method and use of a ?40 mm large-size and high-contrast fiber optic image inverter, belonging to the field of manufacturing of fiber optic imaging elements. The light-absorbing glass for preparing the ?40 mm large-size and high-contrast fiber optic image inverter consists of the following components in molar percentage: SiO2 60-69.9, Al2O3 1.0-10.0, B2O3 10.1-15.0, Na2O 1.0-8.0, K2O 3.0-10.0, MgO 0.1-1.0, CaO 0.5-5.0, ZnO 0-0.1, TiO2 0-0.1, ZrO2 0.1-1.0, Fe2O3 3.0-6.5, Co2O3 0.1-0.5, V2O5 0.51-1.5 and MoO3 0.1-1.0. The fiber optic image inverter has the advantages of low crosstalk of stray light, high resolution and high contrast.

Abstract: A method for preparing an ultra-fine and uniform acrylamide-based polymer hydrogel filament. The method comprises: formulating a reaction solution of acrylamide-based polymer under ice bath conditions, and drawing the reaction solution into a reaction tube by a syringe; parabolically bending the two ends of the reaction tube upward; hanging the reaction tube for 2 h-8 h, and performing a baking reaction to obtain an acrylamide-based polymer hydrogel; vacuum drying the reaction tube for 4 h-8 h to obtain a dry filament of acrylamide-based polymer; cutting the reaction tube to obtain a plurality of short polymerization tubes having a preset length; pushing the dry filament of acrylamide-based polymer out of the short tube by a stainless steel wire; purifying same in a soaking solution to obtain an expanded filament of acrylamide-based polymer; and drying same to obtain a acrylamide-based polymer hydrogel filament having a preset external diameter.

Abstract: Single-stranded oligonucleotide probes, systems, kits and methods for chromosome enumeration, gene copy enumeration, or tissue diagnostics. The probes are particularly suited for detecting gene amplification, deletion, or rearrangement in tissue samples in a single, dual, or multiplexed assay. The probes exhibit improved performance compared to industry leading dual-stranded probes; particularly in terms of the rate of hybridization.

Abstract: Provided is a preparation method of a detector material. The present disclosure epitaxially grows a buffer layer on a surface of a gallium arsenide substrate, deposits a silicon dioxide layer on the buffer layer, and etches the silicon dioxide layer on the buffer layer according to a strip pattern by photolithography and etching to form strip growth regions with continuous changes in width. Finally, a molecular beam epitaxy (MBE) technology is used to epitaxially grow the detector material in the strip growth regions under set epitaxy growth conditions. Because of the same mobility of atoms arriving at the surface of the substrate, numbers of atoms migrating to the strip growth regions are different due to different widths of the strip growth regions, such that compositions of the material change with the widths of the strip growth regions or a layer thickness changes with the widths of the strip growth regions.

Abstract: A segment core and an axial flux motor. The segment core is formed by covering an SMC core (100, 100?) over an outer peripheral surface of a laminated core (200, 200?). An outer surface of the segment core, which can not be processed easily, is shaped by processing the easily shapeable SMC core (100, 100?). The entire structure of the laminated core (200, 200?) is relatively simple, and thus a mold for processing the laminated core (200, 200?) requires simpler specifications. Moreover, the mold can be used to perform processing easily, thereby reducing difficulties of processing the segment core. The segment core has better electromagnetic performance than a segment core solely using an SMC material, and has a higher core utilization rate than a segment core solely using a laminated core (200, 200?).