Abstract: A lens assembly includes a first lens, a second lens, a third lens, a first reflective element, and a second reflective element. The first lens is with positive refractive power. The first reflective element includes a first surface, a second surface, and a third surface, wherein the first surface and the third lens are opposite to each other. The second reflective element includes a fourth surface, a fifth surface, and a sixth surface, wherein the fourth surface and the third surface are opposite to each other. The first lens, the second lens, the third lens, and the first reflective element are arranged in order from an object side along a first axis. The first reflective element and the second reflective element are arranged in order along a second axis. The second reflective element and an image plane are arranged in order along a third axis.

Abstract: An analog front-end chip and an oscilloscope are provided. The analog front-end chip is integrated with an input buffer module, a variable gain amplification module, and at least two output branches. An input end of the input buffer module is configured as an input end of the analog front-end chip, and an output end of the input buffer module is electrically connected to an input end of the variable gain amplification module. An input end of each of the output branches is electrically connected to an output end of the variable gain amplification module, and an output end of each of the output branches is configured as an output end of the analog front-end chip, wherein each of the output branches includes an output buffer module.

Abstract: An icemaker includes a casing that receives water from a water supply and is in thermal communication with an evaporator of a sealed system that chills the casing to freeze the water. An auger is mounted within the interior volume and is rotatable to scrape the ice from the casing and urge it through an extruder to form nugget ice. A BLDC motor is mechanically coupled to the auger to selectively rotate the auger. A controller determines a target speed of the auger based at least in part on the ice production parameter, and operates the BLDC motor to rotate the auger at the target speed. The BLDC motor with the speed-closed control loop can provide the constant speed and enough torque to prevent the ice maker from freezing. The controller can adjust the PWM and the voltage will be adjusted slightly, then the torque will be adjusted accordingly.

Abstract: Disclosed is a wrist-worn device and air pressure adjustment method, apparatus and system thereof. The method includes: controlling a speaker of the wrist-worn device to emit a first sound (S110); receiving a sound signal picked up by a microphone, and analyzing the sound signal to obtain a corresponding amplitude value (S120); and determining whether the amplitude value is less than a preset amplitude threshold (S130), and if so, performing pressure relief process of a rear cavity of the speaker, so that the rear cavity of the speaker maintains air pressure balance (S140), thereby ensuring that the speaker can operate normally, and is advantageous in improving the user experience.

Abstract: The removing device is configured to remove a needle cover removably mounted on a distal tip of an injection device comprising a barrel. The removing device comprises a housing including a holder configured to hold the injection device and a needle cover remover configured to remove the needle cover from the injection device, a first abutment member provided on the holder and being configured to abut against the injection device, a second abutment member provided on the needle cover remover, and being configured to abut against the needle cover, and displacement means configured to displace the needle cover remover relative to the holder in a translational direction so that the first and second abutment members translationally move away from each other in order to separate the needle cover from the injection device.

Abstract: Disclosed are a method and an apparatus for predicting an association relationship between a sign and a lane, and an electronic device. The method comprises determining driving environment data collected by the vehicle during driving process; determining input graph structure data representing an initial relationship between traffic signs and a lane based on the driving environment data; and processing the input graph structure data based on a graph neural network model to obtain an association relationship between a preset type of traffic sign among the traffic signs and the lane. The technical solution of the present disclosure does not require manual design of threshold parameters and algorithm flow in the process of processing the input graph structure data by means of a graph neural network model, and therefore can improve the efficiency and accuracy of determining the association relationship between traffic lights and a lane and ensure safe driving.

Abstract: A background image generation method, a non-transitory computer-readable storage medium and an electronic device. The background image generation method includes: acquiring a first image, searching a second image matching the first image in a preset image library; and performing a color-modulation process on the second image according to the first image, and generating a background image. The user's personalized demands regarding a background image are satisfied, and time and hardware costs for obtaining a background image are reduced.

Abstract: Disclosed is a tube, which has, in the thickness direction, a corrosion-resistant layer and a base layer. The corrosion-resistant layer is at least located on the inner wall of the tube. The corrosion-resistant layer, in addition to Fe and inevitable impurities, further contains the following chemical elements in wt %: 0<C?0.08%; Si: 0.3-0.6%; Mn: 0.5-2.0%; Ni: 11.00-13.00%; Cr: 16.50-18.00%; Mo: 2.00-3.00%; N: 0.02-0.2%; and Cu: 0.01-0.3%, wherein Cr, Mo, N and Cu satisfy the following inequation: Cr+3.3×Mo+16×N+10×Cu?26.0%. Correspondingly, further disclosed is a method for manufacturing the tube, comprising the steps of: (1) preparing a corrosion-resistant layer slab and a base layer slab; (2) assembling the corrosion-resistant layer slab and the base layer slab to obtain a clad slab; (3) heating and rolling: heating the clad slab at a temperature of 1150 to 1200° C.

Abstract: The present invention discloses a pipe, wherein the pipe has a corrosion-resistant layer and a base layer in the thickness direction, the corrosion-resistant layer being at least disposed on the inner wall of the pipe, and the corrosion-resistant layer further comprises, in addition to Fe and inevitable impurities, the following chemical elements in percentage by weight: 0<C?0.05%; Si: 0.3-0.6%; Mn: 0.5-2.0%; Ni: 8.00-14.00%; Cr: 16.00-19.00%; Mo: 2.00-3.50%; N: 0.02-0.20%; and Ti: 0.01-0.2%, and Cr, Mo, N, and Ti satisfy the following inequation: Cr+2.8×Mo+16×N+2×Ti?22.0%. Correspondingly, the present invention further discloses a method for manufacturing the above pipe comprising the steps of: (1) preparing a corrosion-resistant layer slab and a base layer slab; (2) assembling the corrosion-resistant layer slab and the base layer slab to obtain a composite slab; (3) heating and rolling: heating the composite slab at a temperature of 1150-1230° C.

Abstract: An electrodialysis cell includes a housing defining an internal chamber, a core positioned within the internal chamber, a first electrode positioned in the internal chamber adjacent the housing, a second electrode coupled to the core and spaced from the first electrode, and a membrane assembly positioned between the first and second electrodes in a spiral wound configuration. The housing includes an inlet end for receiving a feed fluid and an outlet end in fluid communication with the inlet end. The membrane assembly includes a plurality of ion exchange membranes spaced from each other to define a plurality of fluid channels between the inlet and outlet ends.

Abstract: An icemaker includes a casing that receives water from a water supply and is in thermal communication with an evaporator of a sealed system that chills the casing to freeze the water. An auger is mounted within the interior volume and is rotatable to scrape the ice from the casing and urge it through an extruder to form nugget ice. A BLDC motor is mechanically coupled to the auger to selectively rotate the auger. A controller determines a target speed of the auger based at least in part on the ice production parameter, and operates the BLDC motor to rotate the auger at the target speed. The BLDC motor with the speed-closed control loop can provide the constant speed and enough torque to prevent the ice maker from freezing. The controller can adjust the PWM and the voltage will be adjusted slightly, then the torque will be adjusted accordingly.

Abstract: Disclosed is a tube, having a corrosion resistant layer and a base layer in a thickness direction. The corrosion resistant layer is at least located on the inner wall of the tube. In addition to Fe and inevitable impurities, the corrosion resistant layer further contains the following chemical elements in wt %: 0<C?0.08%; 0<Si?0.75%; 0<Mn?2.0%; Ni: 10.00-14.00%; Cr: 16.00-18.00%; Mo: 2.00-3.00%; and N: 0.02-0.20%, with Cr, Mo and N satisfying the inequation: Cr+3.3×Mo+16×N?25%. Correspondingly, further disclosed is a method for manufacturing the tube, including the steps: (1) preparing a corrosion resistant layer slab and a base layer slab; (2) assembling the corrosion resistant layer slab and the base layer slab to obtain a clad slab; (3) heating and rolling: heating the clad slab at a temperature of 1100 to 1200° C., and then performing multi-pass rolling, with the total reduction rate being not less than 90%, and the final rolling being performed at a temperature of not less than 900° C.

Abstract: A catheter system may include a catheter adapter, which may include a distal end, a proximal end, and a lumen extending through the distal end of the catheter adapter and the proximal end of the catheter adapter. The catheter system may include a catheter extending distally from the distal end of the catheter adapter. The catheter system may include a connector coupled to the catheter adapter and comprising a septum. The catheter system may include a blood collection adapter coupled to the connector. The blood collection adapter may be configured to create a fluid path through the connector. The catheter system may include a blood collection set coupled to the blood collection adapter. The blood collection set may include a needle assembly configured to receive a blood collection container.

Abstract: A grinding system that includes a grinder attached to a grind size adjustment ring. Also, a potentiometer attached to the grind size adjustment ring, so as to provide a grind size measurement to a controller. The controller selects a grinding duration based upon the selected grind size measured by the potentiometer.

Abstract: A Raney copper catalyst, a preparation method and use thereof are provided. The Raney copper catalyst includes aluminum, copper and a metal promoter, wherein the metal promoter comprises a combination of one or more of Ni, Fe, Mo, Co, Ag, Pd, Pt, Au and other elements. The preparation method includes performing high-temperature melting on a mixture containing a copper/aluminum alloy and the metal promoter to obtain a mixed metal cured compound, then smashing the mixed metal cured compound to obtain a catalyst precursor, and subsequently activating to obtain the Raney copper catalyst. The Raney copper catalyst exhibits a capability on hydrogenation reaction based on synergistic effects between metal copper and different promoter metals. Compared with the Raney copper catalyst without metal promoters, when used for preparing 1,3-propanediol through hydrogenation of 3-hydroxypropionaldehyde aqueous solution, the Raney copper catalyst is higher in activity and better in stability.

Abstract: A massage device includes a shell configured to be inserted into a human body, a moving space being defined in the shell and extending through a lateral wall of the shell; a massage member being mounted in the moving space and rotatable relative to the shell, the massage member including a hub and a plurality of blades and/or columns extends radially and outwardly from the hub, a plurality of massage portions being formed by free ends of the blades and/or columns; and a driving member arranged in the shell and connected to the hub of the massage member in a transmission way. The massage member is configured to rotate relative to the shell to move the massage portions in and out of the moving space, so as to have the massage portion stimulate a portion of the human body in which the shell is inserted.

Abstract: A vascular access system which may be configured for blood draw may include a housing, which may include a distal end, a proximal end, and a slot disposed between the distal end and the proximal end. The slot may include a notch. The vascular access system may include a cannula hub, which may be disposed within the housing and movable with respect to the slot. The cannula hub may include a tab extending through the slot. The vascular access system may include a cannula extending distally from the cannula hub. In response to the tab being disposed within the notch, a distal tip of the cannula may be disposed within the housing. In response to advancing the tab along the slot to a distal end of the slot, the distal tip of the cannula is disposed distal to the distal end of the housing.

Abstract: A massage device includes a shell configured to be inserted into a vagina, a lateral wall of the shell concaved inwardly and laterally relative to an outer lateral surface of the shell to define a moving space which communicates with an outside environment out of the outer lateral surface of the shell; a driving member arranged in a chamber of the shell, wherein the chamber is adjacent to and not communicating with the moving space; and a massage member connected to the driving member in a transmission way. The massage member is swingable in a lateral direction of the shell, wherein when the massage member swings, a portion of the massage member is reciprocating to at least a first position inside the moving space of the shell and at least a second position in the outside environment out of the outer lateral surface of the shell.

Abstract: A massage device includes a shell, a first massage portion and a first driving unit. The shell is configured to be inserted into a human body along an insertion direction. A moving space is defined in a middle portion of the shell in the insertion direction and extends through a lateral wall of the shell to define an opening therein. The moving space communicates with an external environment out of the shell through the opening of the lateral wall of the shell. The first massage portion extends into the moving space of the shell. The first driving unit is arranged in the shell and connected to the first massage portion. Under the driving of the first driving unit, the first massage portion moves along an annular trajectory.

Abstract: A massage device includes a shell configured to be inserted into the human body, a driving assembly supported by the shell, and a massage member. The shell defines a moving space therein, and the moving space communicates with an external environment out of the shell. The driving assembly includes a driving wheel and a driven wheel cooperating with the driving wheel. The massage member at least partly extends into the moving space of the shell, and is shaped as an annular belt and mounted around the driving wheel and the driven wheel. The driving wheel engages with the massage member to drive the massage member to rotate, generating a kneading stimulation effect on the human body.