Abstract: A directed chemical conjugate of a glucagon-like peptide-2 mutant, and a use thereof are provided. The glucagon-like peptide-2 mutant is based on the human glucagon-like peptide-2 through multiple site mutations and carboxy terminus extensions. By introducing a targeted chemical modification site, the glucagon-like peptide-2 mutant has biological activities consistent with the natural human glucagon-like peptide-2, and meanwhile, the half-life period in vivo is significantly prolonged, and the administration frequency is reduced, thereby achieving the purpose of treating or preventing short intestinal syndrome, intestinal mucosa injury caused by chemotherapy medicaments or radioactive treatment factors, ulcerative enteritis, chronic enteritis and non-inflammatory bowel injury disease.

Abstract: Disclosed are an unblocking apparatus for a furnace discharging pipe and a use method. The unblocking apparatus includes a rail, a rail car that may move along the rail, an unblocking drive mechanism arranged on the rail car, a heat-unblocking component, a cold-unblocking component, and a material receiving component that is used to receive a blocking material in the discharging pipe, and a drive end of the unblocking drive mechanism is detachably connected with one end of the heat-unblocking component and the cold-unblocking component respectively. The present application effectively handles different blockage situations of the furnace discharging pipe by connecting the unblocking drive mechanism with an unblocking rod capable of heat-unblocking and a drilling rod capable of cold-unblocking, thereby two modes of heat-unblocking and cold-unblocking are performed on the furnace discharging pipe; and the discharging pipe may be unblocked by a remote operation.

Abstract: A power decentralized electric locomotive apparatus includes an electric locomotive and a plurality of muck trucks. The electric locomotive and the plurality of muck trucks are connected in sequence, and a mater drive motor is fixedly mounted on the electric locomotive. A slave drive motor is fixedly mounted on at least one of the muck trucks; a torque of the slave drive motor is smaller than a torque of the mater drive motor; and the slave drive motor cooperates with the mater drive motor, to enable the muck truck to travel on rails and reduce drive power and self-weight of the electric locomotive.

Abstract: The present disclosure provides a method for preparing lithium iron phosphate from ferric hydroxyphosphate, including: purifying ferrous sulfate to form a ferrous sulfate solution, adding hydrogen peroxide, phosphoric acid, an ammonium dihydrogen phosphate solution and ammonia water into the ferrous sulfate solution and then reacting to form a mixed slurry, holding the mixed slurry at a temperature for a period of time, and then washing with water and subjecting to press filtration to form ferric hydroxyphosphate precursors with different iron-phosphorus ratios; then flash drying, sintering at a high temperature, and pulverizing to obtain ferric hydroxyphosphate precursors with different iron-phosphorus ratios and different specific surface areas.

Abstract: Disclosed are a polyethylene glycol conjugate drug, and a preparation method therefor and the use thereof. Specifically, the present invention relates to a polyethylene glycol conjugate drug represented by formula A or a pharmaceutically acceptable salt thereof, a method for preparing the polyethylene glycol conjugate drug or the pharmaceutically acceptable salt thereof, an intermediate for preparing the polyethylene glycol conjugate drug or the pharmaceutically acceptable salt thereof, a pharmaceutical composition comprising the polyethylene glycol conjugate drug or the pharmaceutically acceptable salt thereof, and the use of the polyethylene glycol conjugate drug or the pharmaceutically acceptable salt thereof in the preparation of a drug.

Abstract: This application discloses a battery box. The battery box includes a controller, a first sensor, and a spraying apparatus and an extinguishing agent pipeline that are located above a battery module. The controller is electrically connected to the first sensor and the spraying apparatus. The spraying apparatus is connected to the extinguishing agent pipeline. The first sensor is configured to detect a temperature of the battery box, and send a first electrical signal to the controller. The controller is configured to control the spraying apparatus to spray an extinguishing agent to the battery module. According to the solution of this application, when thermal runaway occurs in the battery box, and the temperature exceeds a set threshold, a fire may be extinguished in time, to avoid spreading of the fire and reduce a loss.

Abstract: The present disclosure provides for methods and systems for improved channel information gathering mechanism. An aspect of the disclosure provides a method. The method includes sending, to one or more stations (STAs), a request for channel information. The channel information being related to one or more channels between an access point (AP) and the one or more STAs. The method further includes receiving, from the one or more (STA), one or more physical layer (PHY) protocol data units (PPDUs). The PPDUs includes channel feature information (CFI) associated with the one or more channels. In some embodiments, the request includes a beamforming report poll (BFRP) trigger frame having a user information field. The user information subfield indicating one or more thresholds associated with one or more parameters of the channel feature information.

Abstract: Disclosed are an implant conveying device and an inner tube assembly thereof, and a catheter, wherein the inner tube assembly comprises an implant protection part, an inner tube and a fixing head connected to the inner tube, wherein the implant protection part is connected to the inner tube or/and the fixing head, the implant protection part is configured to be in contact with an implant to support the implant, and a protector is in the shape of a circular ring sheet or a circular arc sheet.

Abstract: The present invention provides a delivery device for medical implants. The delivery device has a detachable structure and includes a handle (3) and a catheter assembly (1) that are separated from each other. The handle (3) and the catheter assembly (1) are connected by a transmission shaft (2). By configuring the handle (3) and the catheter assembly (1) to be separated from each other, the catheter assembly (1) has less weight than that of a traditional delivery assembly, so that the operator can position the medical implant and adjust the position of the medical implant by moving only the catheter assembly (1). The catheter assembly (1) is lighter in weight and smaller in size, which improves the stability, precision and accuracy of the operation. Moreover, the impact of vibration and/or movement of the handle (3) on the catheter assembly (1) are avoided, which further improves the stability and thus the quality of the operation.

Abstract: The present disclosure discloses a thread transmission structure, and an optical system and a spotlight using the transmission structure. The thread transmission structure includes a sliding element and a rotation adjustment ring sleeved on an outer ring of the sliding element, the rotation adjustment ring being sleeved on an outer side of the sliding element and coupled to the sliding element, the rotation adjustment ring includes an internal thread, the sliding element includes an external thread, the sliding element includes a plurality of thread segments spaced along a circumferential direction, the plurality of thread segments forming at least one round of interrupted external thread, a thread form of the internal thread and the external thread being trapezoidal or rectangular, and the rotation adjustment ring being rotatable relative to the sliding element to push the sliding element to slide in an axial direction.

Abstract: A prosthetic valve delivery catheter and device. The delivery catheter includes an outer sheath assembly and an inner sheath assembly. The outer sheath assembly includes a capsule in which a prosthetic valve can be received and an outer sheath fixedly connected at one end to the capsule. The inner sheath assembly includes an inner sheath and an anchor fixedly connected to the inner sheath. The inner sheath assembly is arranged within a lumen of the outer sheath assembly, and the capsule and the anchor form a circumferentially indexed fit therebetween. With this design, the anchor and the capsule can be driven to rotate under the action of circumferential rotation of the inner sheath, thus the matching between the prosthetic valve and a native valve annulus can be adjusted. Moreover, the capsule can be driven to move axially under actuation of the outer sheath to allow release of the prosthetic valve.

Abstract: A delivery device (1, 1?) for loading, delivering and deploying an implant (2) includes a handle (18), an inner tubular core (11), a sheath tube (13) and a guide tip (12). The inner tubular core (11) is coupled, at a proximal end thereof, to an inner tubular core actuation member arranged in the handle (18), and the guide tip (12) is disposed at a distal end of the inner tubular core (11) and fixedly connected to a distal end of the sheath tube (13). The sheath tube is (13) sleeved over the inner tubular core (11). Here, the proximal end of each component refers to the end thereof closer to the handle (18), while the distal end thereof is the end farther away from the handle (18). As the sheath tube (13) is fixedly connected, at the distal end thereof, to the guide tip (12), the implant (2) is loaded at the proximal end of the sheath tube (13) in the delivery device (1, 1?).

Abstract: A grinding tool comprises: a main component, the main component comprises a housing, a motor, and an output assembly driven by the motor to rotate; and a grinding component, detachably connected to the main component, the grinding component including a grinding body, and an input assembly rotating relative to the grinding body. The main component comprises a first connector, the input assembly includes a second connector, and the first connector is operably movable relative to the second connector to enable the first connector to be joined to the second connector. So that the output assembly is capable of driving the input assembly to drive the body to move. The grinding tool is simple in structure and easy to operate. The application further discloses a main component of a grinding tool and a grinding component of a grinding tool.

Abstract: A method and a network system capable of enhanced transmission of data signals in a multiple-input multiple-output (MIMO) communication system using a double-layer coordinated beamforming are disclosed. A first layer precoding matrix is obtained from long-term channel state information between user equipment and network equipment, and a second layer precoding matrix obtained from the first layer precoding matrix and from real-time channel state information between the user equipment and the network equipment. The real-time channel state information for the second layer precoding matrix determination includes a predetermined signal-to-interference-plus-noise ratio (SINR), and/or a predetermined power value associated with a single antenna of the user equipment, which are used as optimization parameters. The first and second layer precoding matrices are combined for the double-layer coordinated beamforming.

Abstract: The present disclosure discloses a thread transmission structure, and an optical system and a spotlight using the transmission structure. The thread transmission structure includes a sliding element and a rotation adjustment ring sleeved on an outer ring of the sliding element, the rotation adjustment ring being sleeved on an outer side of the sliding element and coupled to the sliding element, the rotation adjustment ring includes an internal thread, the sliding element includes an external thread, the sliding element includes a plurality of thread segments spaced along a circumferential direction, the plurality of thread segments forming at least one round of interrupted external thread, a thread form of the internal thread and the external thread being trapezoidal or rectangular, and the rotation adjustment ring being rotatable relative to the sliding element to push the sliding element to slide in an axial direction.

Abstract: Some embodiments relate to a method for transmitting a signal carrying data in a multiple-input multiple-output communication system. The method comprises applying a double-layer coordinated beamforming. The method also comprises receiving a first layer precoding matrix obtained at least from long-term channel state information between user equipment and network equipment, determining a second layer precoding matrix obtained from the first layer precoding matrix and from real-time channel state information between the user equipment and the network equipment, and obtaining the double-layer coordinated beamforming by combining the first layer precoding matrix and the second layer precoding matrix. Determination of the second layer precoding matrix is optimized by using a predetermined signal-to-interference-plus-noise ratio of the signal, and/or a predetermined power value associated with a single antenna of the user equipment, as optimization parameters.

Abstract: A method of fabricating metal interconnects and an inter-metal dielectric layer thereof. A first metal interconnect pattern and a second metal interconnect pattern disposed thereon are formed on a substrate by plating processes. Subsequently, an inter-metal dielectric layer is formed on the substrate, the first metal interconnect pattern and the second metal interconnect pattern. The inter-metal dielectric layer is then planarized and the second metal interconnect pattern is exposed.

Abstract: A method of fabricating metal interconnects and an inter-metal dielectric layer thereof. A first metal interconnect pattern and a second metal interconnect pattern disposed thereon are formed on a substrate by plating processes. Subsequently, an inter-metal dielectric layer is formed on the substrate, the first metal interconnect pattern and the second metal interconnect pattern. The inter-metal dielectric layer is then planarized and the second metal interconnect pattern is exposed.