Abstract: A tower structure particularly suited for a wind turbine includes a lower tower section formed of concrete and an upper tower section formed of steel. A transition system connects the upper tower section to the lower tower section, the transition system including a concrete component having a tubular wall with a base portion fixed on the lower tower section and a head portion connected to the upper tower section. The head portion extends radially outward beyond the upper tower section. A plurality of first tensioning tendons extend longitudinally at least partially through the tubular wall and are anchored to the concrete component at a top face of the head portion at locations radially outward of the upper tower section.

Abstract: Embodiments described herein relate to a self-adaptive thermal management system. The thermal management system includes a first body, a second body, and a third body. The second body has a first layer and a second layer formed from a Weyl semimetal and a third layer sandwiched between the first layer and the second layer. The third layer is formed from a vanadium dioxide film. The second body is spaced apart from the first body. The third body is spaced apart from the second body. The second body is a modulator configured to transition between a metallic phase and an insulating phase dependent on a temperature to regulate a heat from the first body to the third body through the second body in a self-adaptive manner dependent on the temperature.

Abstract: A sensor includes a tweezer source configured to manipulate a defect nanoparticle in a liquid to a desired position in an enclosure containing the liquid and a light source configured to optically excite the defect nanoparticle in the liquid at the desired position. The sensor also includes a radio frequency (RF) excitation source configured to RF excite the defect nanoparticle in the liquid at the desired position and an optical detector configured to receive an optical signal emitted from the optically excited defect nanoparticle.

Abstract: A system and method are provided for manufacturing a tower structure. Accordingly, an interlocking form ring is additively manufactured with a first printhead assembly. The interlocking form ring defines a plurality of recesses in a radially inner or a radially outer face. A cementitious material is deposited within one or more of the recesses with a second printhead assembly. At least one reinforcing member is positioned within the recess with the second printhead assembly. The second printhead assembly is positioned adjacent to the cementitious material during the curing thereof so as to provide a slip form for the curing of the cementitious material.

Abstract: A loose nail driving device for wooden pallets, comprising a crossbeam, with its lower part allowing semi-finished pallets to pass through, multiple support slides arranged on the crossbeam, which can slide to achieve position adjustment in the transverse direction of the crossbeam. A nailing unit is arranged on the support slides, used for nailing operations at various foot block positions of the semi-finished pallets. The nailing unit includes a frame and a nail driving assembly arranged on the frame. The frame is connected to the support slides through a lifting cylinder. A rotatable large gear and a driving mechanism for driving the large gear are configured on the base frame of the frame. An eccentric hole is machined on the disk surface of the large gear, and the lower end of the nail head of the nail driving assembly is configured within the eccentric hole through a first bearing.

Abstract: A locking device for an electric nail gun powered by a gas spring, comprising: a power box, a striker, a fixed central shaft having a notch, a rotatable locking block on the fixed central shaft, which by rotating engages or disengages from the notch to lock or unlock the striker, a tension spring, a guide pad, synchronously rotating with the fixed central shaft and located above the locking block, with the upper part of the guide pad being secured by a lock nut, a pressure plate on the power box, fixed and perpendicular to the striker, secured by a first bolt and a second bolt, a sleeve fitted over the first bolt, and an integral guide part of the guide pad, with its upper surface tightly against the underside of the pressure plate and its side surface closely adjacent to the sleeve.

Abstract: The present disclosure provides a method performed by an electronic device, an electronic device, a storage medium and a program product, relating to the field of computer vision, image processing and artificial intelligence. The method includes: extracting at least one object center area and at least one object boundary area from a first image; and aligning the extracted object center area with the object boundary area to obtain an object segmentation result of the first image.

Abstract: A unidirectional clutch device for an electric nail gun, comprising a motor, an annular gear fixed above the motor, and a clutch seat. The annular gear contains a central gear and planetary gears. The central gear forms a transmission connection with the motor and meshes with the annular gear through the planetary gears. A lower shim is fixedly attached to the lower part of the annular gear, and an upper shim is positioned at the upper part of the annular gear, movably abutting between the annular gear and the clutch seat. The upper shim has through holes for the pins of the planetary gears. Inside the clutch seat, there is a planet carrier with a cylindrical outer surface, machined with mounting holes for the assembly of the pins. The internal circumference of the clutch seat is machined with needle roller grooves containing needle roller pins.

Abstract: A safety frame travel adjustment device for a nail gun, comprising a firing plate. The safety frame has a long slot machined into it. A positioning sleeve is fixed to the side of the firing plate and interacts with the long slot to ensure the safety frame can slide along the direction of the firing plate. Also on the side of the firing plate is a first spring that supports the safety frame. Additionally, an adjustment seat is fixed to the side of the firing plate, housing an adjustment component for modifying the position of the safety frame. This adjustment component consists of a connecting bolt, a threaded sleeve, an adjustment wheel, and an opening and closing rod. The connecting bolt is secured to the safety frame with a locking nut and is threadedly connected to the threaded sleeve.

Abstract: An optimized nail gun firing structure, which includes a magazine, a guide plate connected to the top of the magazine, a striking pin guided for linear reciprocating motion by the guide plate, and a cover assembly connected to the guide plate. The magazine comprises a fixed plate, a movable plate, and a magazine seat rigidly connected to the bottom of the movable plate. A hook lock assembly forms a connection between the fixed plate and the magazine seat. Inside the magazine, a push plate is disposed, and a compression spring is configured between the push plate and the magazine seat, continuously pushing nails towards the guide plate. The guide plate comprises a separable first guide plate and a second guide plate. The first guide plate is connected to the fixed plate via fasteners, and the second guide plate is connected to the movable plate via fasteners.

Abstract: An arm support structure for a handheld integrated spray painting device, comprising a gun body, a lithium battery, an adaptor box, and an arm support. The arm support and the adaptor box form a rotatable connection through a rotating element, and the adaptor box has internal locking and unlocking mechanisms. The locking mechanism can lock the arm support at a preset position, and the unlocking mechanism allows for the adjustment of the supporting angle of the arm support after unlocking. The adaptor box serves as an intermediate connector, enabling electrical connection between the lithium battery and the gun body, and becomes part of the spray painting device. The adaptor box is equipped with an arm support with an adjustable supporting angle, which better serves the purpose of supporting the arm, relieving the wrist strain of the holder, and facilitating improved work efficiency.

Abstract: Embodiments described herein relate a tunable heat transfer system. The tunable heat transfer system includes a controller, a first body, and a second body. The first body is communicatively coupled to the controller. The second body is communicatively coupled to the controller and spaced apart from the first body. The second body has a plurality of semimetal layers and a dielectric portion positioned between each of the plurality of semimetal layers. Each of the dielectric portions has a thickness to define a gap between each the plurality of semimetal layers in an expanded state and permitting each of the plurality of semimetal layers to abut each other in a contracted state. The controller is configured to change a near-field radiative heat transfer between the first body and the second body by changing the thickness of each of the dielectric portions between the expanded state and the contracted state.

Abstract: A flexural wave absorption system includes a base member connected to a beam that may be subject to flexural waves, an arm member, connected to the base, disposed substantially in parallel alignment with the beam, a mass member connected to a distal end of the arm member, a piezoelectric patch, connected to the arm member, that generates electricity in response to a flexural wave propagating through the beam, and a shunting circuit, connected to the piezoelectric patch, that dissipates electricity generated by the piezoelectric patch to absorb the flexural wave.

Abstract: A device for canceling acoustic noise generated includes, in one example, an inlet channel configured to be fluidly connected to an inlet port of a pump and an outlet channel configured to be fluidly connected to an outlet port of the pump. The device also includes an inlet resonator and an outlet resonator, both having open ends and closed ends. The open ends of the inlet and outlet resonators are fluidly connected to the inlet and outlet channels, respectively. When in operation, the inlet and outlet resonators can cancel noise generated by the operation of the pump.

Abstract: Provided are a method and system for protecting the HVDC line, device, and storage medium. The method for protecting the HVDC line includes that: a DC line parameter and a DC system operation parameter are acquired, and a DC line protection installation position operation parameter is sampled; a line-mode fault voltage of a sampling point, a zero-mode fault voltage of the sampling point, a line-mode fault current of the sampling point, and a continuous rate of change of the line-mode fault current are calculated; in response to starting the line protection, the line-mode fault voltage is compensated based on the DC line parameter, the DC system operation parameter, and a first peak value of the line-mode fault voltage; and in response to determining that the HVDC line is faulty, a line fault polarity is determined based on the zero-mode fault voltage.

Abstract: A system and method are provided for manufacturing a tower structure. Accordingly, a first printed layer of a wall element is deposited with a printhead assembly, and an actual midline perimeter length of the first printed layer is determined. A horizontal reinforcement assembly is then formed based, at least in part, on the actual midline perimeter length. The formed horizontal reinforcement assembly is positioned in a horizontal orientation on the first printed layer and in axial alignment with the vertical axis of the tower structure. With the horizontal reinforcement assembly positioned on the first printed layer, a second printed layer of the wall element is deposited via the printhead assembly on the horizontal reinforcement layer.

Abstract: A method and a device for direction of arrival estimation based on one-bit quantization antenna array, the method including: designing a received signal model of robust one-bit radar, designing an optimal objective function of the robust one-bit radar, replacing a first function in the optimal objective function with a second objective function to obtain a new optimal objective function, and according to the new optimal objective function, adopting a proximal alternating minimization method and a gradient descent method to solve the optimization problem and obtain an incident angle of a target echo signal. The embodiments reshape the received signal model of the one-bit radar, enabling the received signals to preserve or reflect the distribution information of noise data. The embodiments utilize a specific norm to describe the distribution of noise, effectively suppressing quantization error bits generated by low signal-to-noise ratio when estimating DoA with one-bit algorithm.

Abstract: A method for performing data recovering operation is provided. The method includes: identifying a plurality of first values and a plurality of first indexes of a plurality of first entries of an incomplete matrix in a received object data, and one or more second values and one or more second indexes of one or more second entries of the incomplete matrix; inputting the first values, the first indexes, a preset first parameter, a preset second parameter and a preset third parameter into an analysis model using Adaptive Rank-One Matrix Completion (AROMC) algorithm; and obtaining a recovered complete matrix corresponding to the incomplete matrix from the analysis model, so as to obtain optimized one or more second values of the second entries, wherein the optimized one or more second values are determined as original values of the second entries, such that the incomplete matrix is recovered to the recovered complete matrix.

Abstract: System, methods, and other embodiments described herein relate to absorbing flexural waves. In one embodiment, a system includes a longitudinally extending body that is subject to a flexural wave and a bandpass filter. The bandpass filter transmits a target flexural wave having a particular wavelength and blocks a non-target flexural wave. The bandpass filter includes at least two mechanical resonators coupled to a surface of the longitudinally extending body and aligned in a first linear array along a length dimension of the longitudinally extending body. The at least two mechanical resonators of the first linear array are separated by a distance based on the particular wavelength.

Abstract: System, methods, and other embodiments described herein relate to tuning an absorption system based on an exceptional point for a shunted mechanical resonator of the absorption system. In one embodiment, the absorption system includes a first mechanical resonator having a beam connected to a body that is subject to a flexural wave. The first mechanical resonator has a latent absorption. The absorption system includes a first electrical resonator that includes a piezoelectric device, bonded to the beam, that generates electricity in response to the flexural wave propagating through the body. The absorption system also includes a shunting circuit connected to the piezoelectric device and tuned based on a calculated exceptional point for the absorption system. The shunting circuit alters an absorption of the first mechanical resonator and controls a voltage and current shunted to the piezoelectric device to absorb the flexural wave.