Abstract: A negative pressure massager includes a handle; one end of the handle is internally provided with a cavity, and a through hole is provided in one end; a control board, a battery connected to the control board, a button for adjusting a working state of the control board, and a display indicator lamp are arranged in the handle; the negative pressure assembly partially passes through the through hole; the negative pressure assembly includes a negative pressure pipe arranged on the handle, and a piston part driven to move by the control board; and the piston part is arranged in the negative pressure pipe and compresses air in the negative pressure chamber in a movement process to generate a negative pressure for massaging.

Abstract: The present disclosure discloses an optical imaging lens group. The optical imaging lens group comprises, sequentially along an optical axis from an object side to an image side, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens and an eighth lens, wherein the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens and the eighth lens have refractive powers. At least one lens in the first lens to the eighth lens has a non-rotationally symmetric aspheric surface; a total effective focal length fy of the optical imaging lens group in a Y-axis direction and a total effective focal length fx of the optical imaging lens group in an X-axis direction satisfy: fy/fx<0.8; and an f-number Fnoy of the optical imaging lens group in the Y-axis direction satisfies: Fnoy<2.9.

Abstract: The disclosure discloses an optical imaging lens assembly, which sequentially includes, from an object side to an image side along an optical axis: a first lens with a positive refractive power; a variable diaphragm; a second lens; a third lens; a fourth lens; a fifth lens with a negative refractive power; a sixth lens with a positive refractive power; and a seventh lens with a negative refractive power. EPDmax is a maximum entrance pupil diameter of the optical imaging lens assembly, EPDmin is a minimum entrance pupil diameter of the optical imaging lens assembly, and EPDmax, EPDmin and a total effective focal length f of the optical imaging lens assembly meet 3.0<f/(EPDmax?EPDmin)<6.0.

Abstract: A DC-DC converter, an on-board charger, and an electric vehicle are disclosed. The DCDC converter includes: a first adjustment module, a resonance module, a second adjustment module, a current detection module, and a controller. The current detection module is configured to detect a current signal of the resonance module; and the controller is configured to control the first adjustment module and the second adjustment module to reduce an output power when the current signal is greater than a current threshold. By directly detecting the current signal of the resonance module, a high precision and a faster response are achieved.

Abstract: The present disclosure discloses an optical imaging lens assembly, along an optical axis from an object side to an image side, sequentially includes: a first lens having positive refractive power; a second lens; a third lens; a fourth lens; a fifth lens, an image-side surface of the fifth lens being a concave surface; a sixth lens having positive refractive power; and a seventh lens having negative refractive power, an object-side surface of the seventh lens being a convex surface, and an image-side surface of the seventh lens being a concave surface; where, half of a diagonal length ImgH of an effective pixel area on an image plane, an entrance pupil diameter EPD of the optical lens assembly, and a total effective focal length f of the optical imaging lens assembly may satisfy: ImgH*EPD/f>3.5 mm.

Abstract: Disclosed in the present application is an optical imaging lens. The optical imaging lens sequentially comprises, along an optical axis from an object side to an image side: a first lens having positive focal power; a second lens having focal power; a third lens having focal power; a fourth lens having positive focal power, an object side surface of the fourth lens being a convex surface and an image side surface thereof being a concave surface; and a fifth lens having negative focal power, an object side surface of the fifth lens being a convex surface and an image side surface thereof being a concave surface. A combined focal length f12 of the first lens and the second lens and a combined focal length f123 of the first lens, the second lens, and the third lens satisfy a relation that 0.5<f12/f123<1.5.

Abstract: The disclosure discloses an optical imaging lens, which sequentially includes from an object side to an image side along an optical axis: a first lens has a positive refractive power; a second lens has a positive refractive power; a third lens, an object-side surface thereof is a concave surface, and an image-side surface thereof is a convex surface; a fourth lens; a fifth lens has a positive refractive power; a sixth lens has a negative refractive power; TTL is a distance from an object-side surface of the first lens to an imaging surface of the optical imaging lens on the optical axis, ImgH is a half the diagonal length of an effective pixel area on the imaging surface of the optical imaging lens, and TTL and ImgH satisfy TTL/ImgH<1.3; and TTL satisfies TTL<5.0 mm.

Abstract: The disclosure provides an optical imaging lens assembly, which sequentially includes, from an object side to an image side along an optical axis, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens and an eighth lens with refractive power respectively. An image-side surface of the eighth lens is a convex surface. TTL is a distance from an object-side surface of the first lens to an imaging surface of the optical imaging lens assembly on the optical axis, ImgH is a half of a diagonal length of an effective pixel region on the imaging surface of the optical imaging lens assembly, and TTL and ImgH meet TTL/ImgH<1.2. An effective focal length f8 of the eighth lens and a curvature radius R16 of the image-side surface of the eighth lens meet 0.5<f8/R16<1.5.

Abstract: The present invention relates to a massage device and a massage method. The massage device comprises an outer housing, a control board arranged in the outer housing, a battery connected to the control board, and a control button connected to the control board and a charging port for charging the battery which are arranged on the outer housing, wherein the outer housing is provided with an accommodation cavity, a contact massage portion is arranged in the accommodation cavity, the contact massage portion is connected to the outer housing by a main body, and the contact massage portion can completely enter a massage site for massage and can be pulled out from the massage site by the main body and placed in the accommodation cavity.

Abstract: The disclosed embodiments relate to systems and methods for a surgical tool or a surgical robotic system. One example system for handling hardstops includes one or more processors configured to calculate an articulation joint position for the articulation drive disk or the one or more corresponding rotary motors corresponding rotary motors, calculate an articulation joint torque for the articulation drive disk or the one or more corresponding rotary motors, determine a torque ratio based on the articulation joint position and the articulation joint torque, and adjust a commanded articulation joint position received from the user based on the torque ratio to compensate for collision involving the end effector.

Abstract: The present invention relates to a massager with a plurality of massage modes and a massage method. The massager comprises an outer housing, a control board arranged in the outer housing, and a battery and a control button which are connected to the control board, wherein a handle is formed at one end of the outer housing, a charging port for charging the battery is arranged on the handle, at least one group of massagers are also arranged on the outer housing, one group of massagers comprises a first vibration motor and a transmission mechanism connected to the first vibration motor, at least one group of massage columns are arranged at an end portion of the transmission mechanism, and the massage columns are moved by the transmission mechanism when the first vibration motor is working.

Abstract: The disclosed embodiments relate to systems and methods for a surgical tool or a surgical robotic system.

Abstract: The disclosure relate to systems and methods for a surgical tool or a surgical robotic system. An example computer-implemented method for evaluating calibrations of a surgical tool includes fixating a joint of the surgical tool at a first angle, the joint being driven by an actuator, measuring an actuator position corresponding to the first angle, accessing a calibrated offset corresponding to the first angle, determining an expected joint angle based on the measured actuator position and the calibrated offset, and reporting a first difference between the expected joint angle and the first angle.

Abstract: The present disclosure relates to a negative pressure massager and a massage method. The negative pressure massager includes a handle; one end of the handle is internally provided with a cavity, and a through hole is provided in one end; a control board, a battery connected to the control board, a button for adjusting a working state of the control board, and a display indicator lamp are arranged in the handle; the negative pressure assembly partially passes through the through hole; the negative pressure assembly includes a negative pressure pipe arranged on the handle, and a piston part driven to move by the control board; and the piston part is arranged in the negative pressure pipe and compresses air in the negative pressure chamber in a movement process to generate a negative pressure for massaging.

Abstract: The disclosed embodiments relate to systems and methods for a surgical tool or a surgical robotic system. One example method includes providing a redundant degree of freedom (DoF) for an end effector joint of one DoF by driving the joint with two actuators, calculating a position displacement of the joint to effect a desired end effector movement in response to an input command, calculating a first movement of the two actuators based on the position displacement of the joint and a second movement of the two actuators based on a second control objective in a null space corresponding to the redundant DoF, and driving the joint according to the first movement and the second movement to effect the desired end effector movement while accomplishing the second control objective in the null space.

Abstract: The disclosed embodiments relate to systems and methods for a surgical tool or a surgical robotic system. One example system for handling hardstops includes one or more processors configured to calculate an articulation joint position for the articulation drive disk or the one or more corresponding rotary motors corresponding rotary motors, calculate an articulation joint torque for the articulation drive disk or the one or more corresponding rotary motors, determine a torque ratio based on the articulation joint position and the articulation joint torque, and adjust a commanded articulation joint position received from the user based on the torque ratio to compensate for collision involving the end effector.

Abstract: The present disclosure discloses a camera lens group including, sequentially from an object side to an image side along an optical axis, a first lens having negative refractive power, a convex object-side surface and a concave image-side surface; a second lens having refractive power, a convex object-side surface and a concave image-side surface; a third lens having positive refractive power, a convex object-side surface and a convex image-side surface; a fourth lens having refractive power; a fifth lens having refractive power and a concave object-side surface; a sixth lens having positive refractive power, a convex object-side surface and a convex image-side surface; and a seventh lens having negative refractive power. A maximum field-of-view FOV of the camera lens group satisfies: FOV>133.0°. An amount of distortion of the camera lens group is below 25.0%.

Abstract: The disclosed embodiments relate to systems and methods for a surgical tool or a surgical robotic system.

Abstract: A plate heat exchanger includes a number of first heat exchange plates and a number of second heat exchange plates. The plate heat exchanger has a first inter-plate channel and a second inter-plate channel. The first inter-plate channel is located between a front surface of the second heat exchange plate and an adjacent first heat exchange plate. The second inter-plate channel is located between a back surface of the second heat exchange plate and another adjacent first heat exchange plate. The first heat exchange plate has a first flat joint portion and a second flat joint portion. The front surface of the second flat joint portion is spaced apart from an adjacent first flat joint portion. The plate heat exchanger includes at least one connection portion connecting the front surface of the second flat joint portion and the adjacent first flat joint portion.

Abstract: The disclosed embodiments relate to systems and methods for a surgical tool or a surgical robotic system. One example method includes providing a redundant degree of freedom (DoF) for an end effector joint of one DoF by driving the joint with two actuators, calculating a position displacement of the joint to effect a desired end effector movement in response to an input command, calculating a first movement of the two actuators based on the position displacement of the joint and a second movement of the two actuators based on a second control objective in a null space corresponding to the redundant DoF, and driving the joint according to the first movement and the second movement to effect the desired end effector movement while accomplishing the second control objective in the null space.