Abstract: Provided is a supergravity directional solidification melting furnace equipment, including a supergravity test chamber and, mounted in the supergravity test chamber, a high-temperature heating subsystem, a crucible, and an air-cooling system. The supergravity test chamber is mounted with a wiring electrode and a cooling air valve device. The high-temperature heating subsystem is fixed in the supergravity test chamber. The crucible and the air cooling system are provided in the high-temperature heating subsystem. The high-temperature heating subsystem includes upper, middle, and lower furnaces, a mullite insulating layer, upper and lower heating cavity outer bodies, upper and lower heating furnace pipes, and a crucible support base. A high-temperature heating cavity is divided into upper and lower parts, is provided therein with a spiral groove, and is fitted with a heating element. The crucible support base is provided therein with a vent pipe channel into which a cooling air is introduced.

Abstract: The present application relates to a synthesis method for N-methyl-3-substituted methyl-4-pyrazolamide derivative and N-methyl-3-substituted methyl-4-pyrazolic acid, including the following steps: step S1: synthesis of intermediate E; step S2: synthesis of intermediate D; step S3: synthesis of intermediate C; step S4: synthesis of N-methyl-3-substituted methyl-4-pyrazolamide derivative; and synthesis of N-methyl-3- substituted methyl-4-pyrazolic acid by decomposition of N-methyl-3-substituted methyl-4-pyrazolamide derivative.

Abstract: A digital speckle based online water wall stress monitoring method and device, and the method includes the following steps: arrange an online stress monitoring device on the side of the water wall to be monitored; determine a plurality of monitoring points according to the area of the water wall, and set the motion track of the online stress monitoring device for speckle image acquisition according to the determined monitoring points; acquire the real-time speckle image of each monitoring point in real time after acquiring the initial speckle image of each monitoring point; compare the real-time speckle images with the initial speckle images, and determine whether the stress of the water wall changes according to the comparison results. The invention adopts non-contact digital image technology, and determines the difference between the real-time and initial speckle images of the water wall to realize the stress monitoring.

Abstract: A guidewire (10) is provided including a core wire (12), a resin layer (14) at least partially surrounding the core wire, and a coil wire (16) external to the resin layer. The resin layer extending over and along the core wire may comprise a series of windings, which may have a constant or variable pitch, or may comprise a sleeve. By applying a heat treatment to portions og the guidewire, the resin layer may be selectively melted to form a bond between the core wire and the coil wire. This technique may be used to provide the guidewire with a desired strength profile, without the need for tapering the ends of the core wire.

Abstract: A seismic attenuation quality factor Q is determined for seismic signals at intervals of subsurface formations between a seismic source at a marine level surface and one or more receivers of a well. Hydrophone and geophone data are obtained. A reference trace is generated from the hydrophone and geophone data. Vertical seismic profile (VSP) traces are received. First break picking of the VSP traces is performed. VSP data representing particle motion measured by a receiver of the well are generated. The reference trace is injected into the VSP data. A ratio of spectral amplitudes of a direct arrival event of the VSP data and the reference trace is determined. From the ratio, a quality factor Q is generated representing a time and depth compensated attenuation value of seismic signals between the seismic source at the marine level surface and the first receiver.

Abstract: A tool for inserting a catheter into a body of a patient is provided. The tool comprises: a housing in which at least a portion of the catheter is initially disposed; a needle distally extending from the housing, at least a portion of the catheter disposed over the needle; a guidewire initially disposed within the needle partially; and an advancement assembly for distally advancing the catheter. The housing comprises: a first portion comprising a distal part and a proximal part; and a second portion engaged with the first portion, wherein the distal part of the first portion is configured to be able to distally slide with respect to the second portion to release the engagement between the first portion and the second portion. The advancement assembly includes a safety cap which is initially disposed over the needle and is configured to be locked to the housing when distally sliding to a position of isolating the tip of the needle within the safety cap.

Abstract: A seismic attenuation quality factor Q is determined for seismic signals at intervals of subsurface formations between a seismic source at a marine level surface and one or more receivers of a well. Hydrophone and geophone data are obtained. A reference trace is generated from the hydrophone and geophone data. Vertical seismic profile (VSP) traces are received. First break picking of the VSP traces is performed. VSP data representing particle motion measured by a receiver of the well are generated. The reference trace is injected into the VSP data. A ratio of spectral amplitudes of a direct arrival event of the VSP data and the reference trace is determined. From the ratio, a quality factor Q is generated representing a time and depth compensated attenuation value of seismic signals between the seismic source at the marine level surface and the first receiver.

Abstract: A surgical instrument includes a housing, a shaft coupled to and extending distally from the housing, an end effector assembly disposed at a distal end of the shaft, a movable handle coupled to the housing, a drive assembly coupled to the end effector assembly, and an extension mechanism disposed within the housing. The extension mechanism is configured to couple to the shaft and between the movable handle and the drive assembly for moving the shaft and drive assembly between a retracted position and an extended position relative to the housing. The extension mechanism is coupled between the movable handle and the drive assembly in each of the retracted and extended positions such that the movable handle is operable to effect manipulation of the end effector assembly in each of the retracted and extended positions.

Abstract: A tool (10) for inserting a catheter (22) into a body of a patient is provided. The tool (10) comprises: a housing (12, 40, 50) in which at least a portion of the catheter (22) is initially disposed; a needle (16) distally extending from the housing (12, 40, 50), at least a portion of the catheter (22) disposed over the needle (16); a guidewire (32) initially disposed within the needle (16) partially; and an advancement assembly (20) for distally advancing the catheter (22). The housing (12, 40, 50) comprises: a first portion (12A, 42, 52) comprising a distal part (42A, 52A) and a proximal part (42B); and a second portion (12B, 44, 54) engaged with the first portion (12A, 42, 52), wherein the distal part (42A, 52A) of the first portion (12A, 42, 52) is configured to be able to distally slide with respect to the second portion (12B, 44, 54) to release the engagement between the first portion (12A, 42, 52) and the second portion (12B, 44, 54).

Abstract: An end effector assembly includes a first jaw member having a first tissue contact surface and a second jaw member having a second tissue contact surface. The second jaw member is pivotally coupled to the first jaw member. The tissue contact surfaces may include raised steps that define an exhaust channel. A longitudinally extending knife slot may be defined in one or both of the tissue contact surfaces. One or more exhaust slots, which may be defined in one or both of the tissue contact surfaces, are in communication with the knife slot. The exhaust channel and the exhaust slots direct fluid away from the jaw members to minimize thermal damage risks associated with tissue sealing.

Abstract: An end effector assembly (114) includes a first jaw member (114a) having a first tissue contact surface (122) and a second jaw member (114b) having a second tissue contact surface (122). The second jaw member (114b) is pivotally coupled to the first jaw member (114a). The tissue contact surfaces (122) may include raised steps (122b) that define an exhaust channel (124). A longitudinally extending knife slot (214) may be defined in one or both of the tissue contact surfaces (122). One or more exhaust slots (216), which may be defined in one or both of the tissue contact surfaces (122), are in communication with the knife slot (214). The exhaust channel (124) and the exhaust slots (216) direct fluid away from the jaw members (114a, 114b) to minimize thermal damage risks associated with tissue sealing.

Abstract: An end effector assembly (100, 200) of an electrosurgical forceps (10, 10?) includes first and second jaw members (110, 120, 210, 220). At least one of the jaw members (110, 120, 210, 220) is movable relative to the other between a spaced-apart position and an approximated position. At least one of the jaw members (110, 120, 210, 220) includes an electrically-conductive inner member (115, 125) defining an outer surface, a first electrically-insulative layer (116, 126) disposed on a portion of the outer surface of the electrically-conductive inner member (115, 125), a second electrically-insulative layer (117, 127) disposed on another portion of the outer surface of the electrically-conductive inner member (115, 125), and an electrode (118, 128) disposed on the second electrically-insulative layer (117, 127) and electrically coupled to the electrically-conductive inner member (115, 125). The electrode (118, 128) defines a tissue-treating surface of the corresponding jaw member (110, 120, 210, 220).

Abstract: A tool (10) for inserting a catheter (22) into a body of a patient is provided. The tool (10) comprises: a housing (12, 40, 50) in which at least a portion of the catheter (22) is initially disposed; a needle (16) distally extending from the housing (12, 40, 50), at least a portion of the catheter (22) disposed over the needle (16); a guidewire (32) initially disposed within the needle (16) partially; and an advancement assembly (20) for distally advancing the catheter (22). The housing (12, 40, 50) comprises: a first portion (12A, 42, 52) comprising a distal part (42A, 52A) and a proximal part (42B); and a second portion (12B, 44, 54) engaged with the first portion (12A, 42, 52), wherein the distal part (42A, 52A) of the first portion (12A, 42, 52) is configured to be able to distally slide with respect to the second portion (12B, 44, 54) to release the engagement between the first portion (12A, 42, 52) and the second portion (12B, 44, 54).

Abstract: A method, system, and device for processing video shooting are described. The method includes: shooting a subject in a background sample, the background sample, and a target background respectively, to generate a first video recording the subject and the background sample, a second video recording the background sample, and a third video recording the target background respectively, the shooting time lengths of the first video and the second video being smaller than the shooting time length of the third video; and comparing the first video and the second video, extracting images of the subject from the first video, generating a subject image frame sequence with a transparent background, sequentially superimposing each subject image frame in the subject image frame sequence to the third video, and generating a video file recording the subject and the target background.

Abstract: An end effector assembly (100, 200) of an electrosurgical forceps (10, 10?) includes first and second jaw members (110, 120 210, 220). At least one of the jaw members (110, 120, 210, 220) is movable relative to the other between a spaced-apart position and an approximated position. At least one of the jaw members (110, 120, 210, 220) includes an electrically-conductive inner member (115, 125) defining an outer surface, a first electrically-insulative layer (116, 126) disposed on a portion of the outer surface of the electrically-conductive inner member (115, 125), a second electrically-insulative layer (117, 127) disposed on another portion of the outer surface of the electrically-conductive inner member (115, 125), and an electrode (118, 128) disposed on the second electrically-insulative layer (117, 127) and electrically coupled to the electrically-conductive inner member (115, 125). The electrode (118, 128) defines a tissue-treating surface of the corresponding jaw member (110, 120, 210, 220).

Abstract: An end effector assembly (114) includes a first jaw member (114a) having a first tissue contact surface (122) and a second jaw member (114b) having a second tissue contact surface (122). The second jaw member (114b) is pivotally coupled to the first jaw member (114a). The tissue contact surfaces (122) may include raised steps (122b) that define an exhaust channel (124). A longitudinally extending knife slot (214) may be defined in one or both of the tissue contact surfaces (122). One or more exhaust slots (216), which may be defined in one or both of the tissue contact surfaces (122), are in communication with the knife slot (214). The exhaust channel (124) and the exhaust slots (216) direct fluid away from the jaw members (114a, 114b) to minimize thermal damage risks associated with tissue sealing.

Abstract: A method, system, and device for processing video shooting are described. The method includes: shooting a subject in a background sample, the background sample, and a target background respectively, to generate a first video recording the subject and the background sample, a second video recording the background sample, and a third video recording the target background respectively, the shooting time lengths of the first video and the second video being smaller than the shooting time length of the third video; and comparing the first video and the second video, extracting images of the subject from the first video, generating a subject image frame sequence with a transparent background, sequentially superimposing each subject image frame in the subject image frame sequence to the third video, and generating a video file recording the subject and the target background.

Abstract: A pair of stereoscopic viewing glasses is provided, including: lenses (1), a support (2), and a baffle plate (3). The support (2) includes a top surface (201) and side surfaces (202, 203). The top surface (201) and the side surfaces (202, 203) of the support (2) form a cavity. The baffle plate (3) is fixed inside the cavity, and divides the cavity into two independent cavities (4). An accommodation space (5) for a terminal is equipped between a bottom edge of the baffle plate (3) and a bottom of the cavity. The cavity is equipped with an operating opening (6) by which an operation is conducted on the terminal. The top surface (201) is equipped with two mounting holes (7) which are positioned on two sides of the baffle plate (3) respectively, and are connected to the two independent cavities (4) and have the lenses (1) mounted therein.

Abstract: A surgical instrument includes a housing, a shaft coupled to and extending distally from the housing, an end effector assembly disposed at a distal end of the shaft, a movable handle coupled to the housing, a drive assembly coupled to the end effector assembly, and an extension mechanism disposed within the housing. The extension mechanism is configured to couple to the shaft and between the movable handle and the drive assembly for moving the shaft and drive assembly between a retracted position and an extended position relative to the housing. The extension mechanism is coupled between the movable handle and the drive assembly in each of the retracted and extended positions such that the movable handle is operable to effect manipulation of the end effector assembly in each of the retracted and extended positions.

Abstract: Disclosed is a near field communication method, the method comprising: after a receiver receives an information transmission request message sent by a sender, determining when the sender identification carried by the information transmission request message matches the receiver identification, the two parties establishing a link, and according to the information reception condition set by the receiver, determining whether to receive information; at the same time, also disclosed is a near field communication device. Using the technical solution of the invention, information automation transmission can be implemented between mobile phones, thus reducing user operation steps, and enabling a user to conveniently use.