Abstract: The present application relates to a silicon-carbon composite material in the form of particles comprising a porous carbon skeleton, a silicon-containing deposition layer, and a carbon-containing coating layer, wherein the silicon-containing deposition layer is in pores of the porous carbon skeleton, the carbon-containing coating layer is on the silicon-containing deposition layer and/or on the surface of the particles, and the silicon-carbon composite material has an oil absorption number of 35 mL/100 g to 80 mL/100 g. The silicon-carbon composite material of the present application has a high energy density and an improved cycle life. In addition, the present application further relates to a negative electrode plate comprising the material, a secondary battery, a battery module, a battery pack, and a power consuming device.

Abstract: A turnout structure includes at least one turnout. The at least one turnout includes: a fixed beam set including a first side beam and a second side beam, and at least two movable beam sets disposed between the first side beam and the second side beam to define at least three switchable traveling pathways. Top surfaces of the at least two movable beam sets are configured to be a first traveling surfaces for traveling wheels of a rail vehicle to travel. Each of the at least two movable beam sets includes a rotating beam and a moving beam. A rotating center is located on a first end of the rotating beam, the rotating beam is configured to rotate around the rotating center, and the moving beam is connected to a second end of the rotating beam and configured to move along a path.

Abstract: A turnout structure, which includes at least one turnout. The at least one turnout includes a fixed beam set. The fixed beam set includes a first side beam and a second side beam. The at least one turnout further includes a movable beam set. The movable beam set is disposed between the first side beam and the second side beam to define two switchable driving channels. A top surface of the movable beam set is configured as a first locomotion surface for locomotion wheels of a railway vehicle. The movable beam set includes a rotating beam and a moving beam. A first end of the rotating beam includes a rotating center. The rotating beam is configured to rotate around the rotating center, and the moving beam is connected to a second end of the rotating beam and configured to move along a path.

Abstract: A multiple gate transistor and method of its manufacture are described. The transistor comprises a common substrate, a source, a drain, a body, a first gate electrode and a second gate electrode. The first gate electrode and the second gate electrode are colinearly aligned along a horizontal plane of the common substrate and are separated by a dielectric wall. The dielectric wall provides electrical isolation between the first gate electrode and the second gate electrode.

Abstract: This application relates to a silicon-carbon composite material. The silicon-carbon composite material includes a carbon nanotube-and-porous carbon composite substrate and a silicon-based material. The porous carbon is connected to the carbon nanotube by a connecting unit in the carbon nanotube-and-porous carbon composite substrate. The high conductivity and strong mechanical properties of the carbon nanotubes can improve the overall conductivity, compression resistance, and expansion resistance of the silicon-carbon composite material, thereby improving cycle performance, electrode plate cycle expansion resistance, and rate performance of a secondary battery.

Abstract: A trench MOSFET device implements a trench source/body contact structure and includes a first MOSFET section and a second MOSFET section where the first MOSFET section has a body contact resistance lower than a body contact resistance of the second MOSFET section. In some embodiments, the first MOSFET section includes trench source/body contacts to make electrical contact with the source region and with a body contact doped region having a first doping level. In one embodiment, the second MOSFET section includes trench source/body contacts that contacts only the source region. In another embodiment, the second MOSFET section includes trench source/body contacts to make electrical contact with the source region and with a second body contact doped region having a second doping level lower than the first doping level. In some embodiments, the first MOSFET section has a transistor area much smaller than the transistor area of the second MOSFET section.

Abstract: A silicon-carbon composite material and a preparation method thereof, a negative electrode plate, and a secondary battery are disclosed. The silicon-carbon composite material includes a porous carbon matrix and silicon-based particles. The porous carbon matrix internally includes a plurality of pore channels with a width of 5 nm-50 nm. The silicon-based particles are distributed in the pore channels, and the porous carbon matrix meets: 1.0×10?7?Vtotal/Stotal?10.0×10?7, where Stotal is the total surface area occupied by the pore channels with the width of 5 nm-50 nm, and the measurement unit is: ×104 cm2/g; and Vtotal is the total pore volume occupied by the pore channels with the width of 5 nm-50 nm. The silicon-carbon composite material has high electrical conductivity. When being applied to a negative electrode of the secondary battery, the silicon-carbon composite material can effectively increase the volume capacity and energy density of the secondary battery.

Abstract: The disclosure provides methods of characterizing a sample of oligonucleotides of interest using liquid chromatography and mass spectrometry.

Abstract: The present application provides a silicon-carbon composite, a method of preparing the same, and a secondary battery including the silicon-carbon composite. The silicon-carbon composite includes porous carbon-based matrix particles having a three-dimensional network interconnecting pore structure; and silicon-based nanoparticles, at least a portion of which is provided in the three-dimensional network interconnecting pore structure. The present application enables secondary batteries to have an improved cycle performance and energy density.

Abstract: The present disclosure relates to a cavity of a medical device. The cavity may include a bore and an accommodating cavity configured to provide an accommodating space for at least a portion of a couch in a radial direction of the bore. The accommodating cavity may be disposed on an inner wall of the bore and extend along an axial direction of the bore, and the accommodating cavity may be configured to form, with the bore, a connected space in which the at least a portion of the couch is allowed to move along an axial direction of the bore.

Abstract: A gate structure of flow guiding sediment bypass tunnel with self-adaptive inlet adjustment the gate structure comprises a sediment bypass tunnel main body, wherein: the sediment bypass tunnel main body comprises a second revolution wheel, a second braking rim, a top water stopper plate and a weir, a second regulator is provided at a front side of the sediment discharge tunnel, the second revolution wheel is provided at a top portion of the second regulator, a top portion of the second revolution wheel is welded with the second valve lever, the second valve lever is connected with the top portion of the second regulator, and by providing the flow guiding structure at the bottom portion bottom water flows with higher sediment concentrations can be guided into the tunnel; and the altitude of the flow guiding inlet at the bottom portion can be automatically controlled with the gate structure.

Abstract: Embodiments of the present application provide a needle winding assembly for winding electrode plates and a separator and a winding device. The winding needle assembly includes a first winding needle and a second winding needle for clamping the separator, and the second winding needle is provided with a rolling member on a side of the second winding needle toward the first winding needle. Due to the presence of the rolling member, there is rolling friction between the rolling member and the first winding needle, reducing the friction between the first winding needle and the second winding needle, which avoids scratching the separator when the winding needle assembly is inserted into the separator or pulled out of the separator, or avoids misplacing and bringing out part of the separator when the second winding needle is pulled out, which otherwise would reduce the production efficiency of the battery.

Abstract: The present disclosure relates to a medical device. The medical device comprises a gantry; a first support member rotatably mounted on the gantry around a first rotation axis; and a treatment device including a treatment ray emitter configured to emit treatment rays and a treatment ray receiver configured to receive the treatment rays, the treatment ray emitter and the treatment ray receiver being rotatably mounted on the first support member around a second rotation axis synchronously, wherein the first rotation axis intersects with the second rotation axis.

Abstract: A valve spring fixing device and a plunger pump are disclosed. The valve spring fixing device includes a spring fixing piece, which includes a first supporting surface and a second supporting surface located at two ends of the spring fixing piece, and an intermediate portion located between the first supporting surface and the second supporting surface; and a spring mounting portion connected with the intermediate portion and configured to mount a valve spring, the first supporting surface and the second supporting surface are configured to contact with a valve box to fix the valve spring fixing device.

Abstract: A cover, a fluid end and a plunger pump are provided. The cover includes: a body, the body being cylindrical, and the body including a first end, a second end, and a side surface connecting the first end and the second end; a main flow channel extending along an axis of the body; a plurality of subsidiary flow channels, each of the plurality of subsidiary flow channels being communicated with the main flow channel; a first opening, located at the first end and communicated with the main flow channel; and a plurality of second openings, located at the side surface of the body; each of the plurality of subsidiary flow channels being communicated with at least one of the plurality of second openings.

Abstract: Embodiments of the present disclosure provides an anti-loosening device and a plunger pump. The anti-loosening device includes a first bracket, a second bracket and an elastic member. The first bracket includes a first clamping part defining a first accommodating space; a first connecting part extending in a first direction and fixedly connected to the first clamping part; and a limiting part fixedly connected to the first clamping part via the first connecting part, wherein the limiting part protrudes from the first connecting part in a second direction perpendicular to the first direction. The second bracket includes a second clamping part defining a second accommodation space, wherein the second clamping part is opposite to the first clamping part in the first direction; and a second connecting part extending in the first direction and fixedly connected to the second clamping part.

Abstract: A plunger, a hydraulic end and a plunger pump are disclosed. The plunger includes a plunger body, the plunger body includes a flow channel; a first liquid inlet hole is located in the plunger body and passes through the sidewall of the plunger body; the plunger body includes a first end portion and a second end portion, a flow channel extends from the first end portion to the second end portion, a part of the flow channel close to the first end portion is closed, the flow channel extends to the second end portion and forms a first opening, the first liquid inlet hole is communicated with the flow channel, the first valve assembly is located at the first opening, and is configured to allow fluid to flow out from the flow channel at the first opening and prevent fluid from flowing back to the flow channel from outside.