Abstract: A conductive contact structure of a solar cell is provided, includes a substrate; a semiconductor region; and an electrode. The semiconductor region is disposed on or in the substrate. The electrode is disposed in the semiconductor region. The electrode includes a seed layer in contact with the semiconductor region. The seed layer includes an alloy material, and includes a main component and an improved component. The main component is one or more metals having an average refractive index lower than 2 and a wavelength in a range of 850-1200 nm, and the improved component includes any one or more of Mo, Ni, Ti, W, Cr, Mn, Pd, Bi, Nb, Ta, Pa, Si, and V.

Abstract: A thin film transistor and a manufacturing method therefor, an array substrate, and a display panel and device. The thin film transistor includes: a gate (11) and an active layer (12) that are located on one side of a base substrate (10); a gate insulation layer (13) located between the gate (11) and the active layer (12); and a source (14) and a drain (15) that are spaced apart and both are in contact with the active layer (12), wherein a first ratio of the thickness of the gate insulation layer (13) and the thickness of the active layer (12) ranges from 3 to 4.

Abstract: A power device and a power tool are provided, including a motor and a transmission gear set. The transmission gear set includes a driving gear and a driven gear, a speed of the motor is from 5000 rpm to 11000 rpm, a diameter is from 20 mm to 50 mm, and a volume is from 600 mm3 to 2200 mm3. A weight is from 90 g to 260 g. A reduction ratio of the driving gear to the driven gear is from 2 to 7. The power tool of the disclosure adopts an outer rotor motor with a smaller rotor diameter and a lower rotating speed, which reduces a volume and weight of the overall device, is easy to mount and carry, and increases a battery life.

Abstract: The present disclosure provides a thermal-stress-pore pressure coupled electromagnetic loading triaxial Hopkinson bar system and test method, the system mainly consists of an electromagnetic pulse generation system, a servo-controlled axial pressure loading system, a servo-controlled confining pressure loading system, a thermal control system, a pore pressure loading system, a bar system, and a data monitoring and acquisition system. Based on the conventional Hopkinson bar, the present disclosure creatively introduces a real-time loading and control system for confining pressure, thermal, and pore pressure, aiming to solve the technical problem that the existing test apparatus cannot be used to study dynamic response of deep rock mass under the coupling effect of thermal-stress-pore pressure and dynamic disturbance during dynamic impact loading.

Abstract: Provided is a steam jet multifunctional aircraft deicing vehicle with steam jet, includes a vehicle body, where a steam generating assembly is arranged in the vehicle body, and the steam generating assembly is connected with a steam conveying assembly. A moving assembly is rotatably connected above the vehicle body, and the moving assembly is rotatably connected with an execution assembly. The execution assembly includes a first spray head assembly and a second spray head assembly. The steam conveying assembly includes a first supercharger and a second supercharger arranged side by side, where an air outlet end of the first supercharger is communicated with one end of a first air outlet pipe, and an other end of the first air outlet pipe is communicated with spray heads of the second spray head assembly through a first air pipeline.

Abstract: A uniaxial bidirectional synchronous control electromagnetic loaded dynamic shear test system and method, a test apparatus thereof including a support platform, a loading bar system, an electromagnetic pulse generation system, a servo-controlled normal pressure loading system, and a data monitoring and acquisition system. The test apparatus can be used to conduct a dynamic shear test research on a rock-like material under a constant normal pressure close to an actual operating condition, and can also be applied to carry out dynamic shear tests on intact rock-like test specimens in various sizes or jointed rock-like test specimens containing a single structural surface to study dynamic shear mechanical property and shear failure behavior under strain rate of 101?103 s?1, thereby providing an important theoretical and technical support for the design, construction, protection, and safety and stability evaluation of geotechnical engineering, structural engineering.

Abstract: A method for diagnosing lithium plating in lithium ion batteries includes performing electrochemical impedance spectroscopy analysis on complete or undisassembled lithium-ion batteries under different temperatures.

Abstract: An image processing method and apparatus, and a computer readable medium are provided. The method includes that includes: a first reference surface on which a virtual object is placed is determined based on an image collected by an image collection device; a to-be-placed virtual object and pose information of the image collection device relative to the first reference surface are acquired; a display size of the to-be-placed virtual object is determined based on the pose information; and the to-be-placed virtual object is rendered on the image according to the display size.

Abstract: Disclosed are a method and apparatus for subzero start-up of a fuel cell. The method for the subzero start-up of the fuel cell includes: introducing a gas containing hydrogen having a mass percentage of 5% to 100% to a hydrogen electrode and an air electrode of the fuel cell (2) under a condition of minus 50° C. to 0° C.; applying a current or a voltage to the fuel cell (2), and utilizing ohmic heat generation, reaction heat, and concentration overpotential heat generation of the fuel cell (2) to raise the fuel cell (2) to a required temperature or to cause the fuel cell (2) to reach to a set time, so as to implement the subzero start-up of the fuel cell.

Abstract: A torque-sensor strain beam structure and a torque sensor are provided. The torque-sensor strain beam structure comprises an external ring, a connecting hub and at least two strain beams. The external ring has a first joint. The connecting hub is located in the external ring and arranged coaxially with the external ring. The connecting hub has a second joint. A first end of each of the at least two strain beams is fixedly connected to an inner wall of the external ring and a second end of each of the at least two strain beams is fixedly connected to the connecting hub. A strain grid is provided on each of the at least two strain beams. A load inputting point is located at the first joint or the second joint. Arrangement of the torque-sensor strain beam structure allows the torque sensor to have smaller volume while having higher measurement sensitivity.

Abstract: A torque-sensor strain beam structure and a torque sensor are provided. The torque-sensor strain beam structure comprises an external ring, a connecting hub and at least two strain beams. The external ring has a first joint. The connecting hub is located in the external ring and arranged coaxially with the external ring. The connecting hub has a second joint. A first end of each of the at least two strain beams is fixedly connected to an inner wall of the external ring and a second end of each of the at least two strain beams is fixedly connected to the connecting hub. A strain grid is provided on each of the at least two strain beams. A load inputting point is located at the first joint or the second joint. Arrangement of the torque-sensor strain beam structure allows the torque sensor to have smaller volume while having higher measurement sensitivity.

Abstract: An image processing method and apparatus, and a computer readable medium are provided. The method includes that includes: a first reference surface on which a virtual object is placed is determined based on an image collected by an image collection device; a to-be-placed virtual object and pose information of the image collection device relative to the first reference surface are acquired; a display size of the to-be-placed virtual object is determined based on the pose information; and the to-be-placed virtual object is rendered on the image according to the display size.

Abstract: The disclosure can provide a method and an apparatus for querying application programming interfaces of a webpage, an electronic device, and a storage medium. The method includes: receiving, from a client, a request for querying the interfaces of the webpage, and determining a to-be-analyzed webpage corresponding to the request for querying the interfaces of the webpage; searching for historical request events of the to-be-analyzed webpage; determining interface addresses invoked when performing the historical request events, and determining invoked interfaces of the to-be-analyzed webpage based on the interface addresses; and generating an interface list based on interface identifiers of the invoked interfaces, and feeding the interface list back to the client.

Abstract: Disclosed are a method and apparatus for subzero start-up of a fuel cell. The method for the subzero start-up of the fuel cell includes: introducing a gas containing hydrogen having a mass percentage of 5% to 100% to a hydrogen electrode and an air electrode of the fuel cell (2) under a condition of minus 50° C. to 0° C.; applying a current or a voltage to the fuel cell (2), and utilizing ohmic heat generation, reaction heat, and concentration overpotential heat generation of the fuel cell (2) to raise the fuel cell (2) to a required temperature or to cause the fuel cell (2) to reach to a set time, so as to implement the subzero start-up of the fuel cell.

Abstract: The present invention discloses a fast water stopping structure, which comprises a body, the body is provided with an internal watercourse, the body is also provided with a water outlet hole connected to the watercourse, the inlet end of the water outlet hole is provided with a water stop plate, the water stop plate is provided with a crack. The structure quickly stops water from the water outlet hole after the water flow is shut off to prevent water from dripping down.

Abstract: Estimating a battery state of health (SOH) is described. The state of heath is estimated by obtaining a partial charge or discharge capacity of a target battery in a state of charge (SOC) interval of each of a plurality of SOCs. First dV/dSOC data is separately calculated for each SOC in an mth preset battery capacity based on the mth preset battery capacity and the partial charge or discharge capacity in the SOC interval of each SOC. A smallest overall dV/dSOC data deviation is determined from all overall dV/dSOC data deviations corresponding to M preset battery capacities. A preset battery capacity is determined corresponding to the smallest overall dV/dSOC data deviation as a retention capacity of an aged target battery. The retention capacity of the aged target battery is divided by a retention capacity of the target battery in a new battery state, to obtain the SOH estimate of the target battery.

Abstract: An active control method and system for wellbore pressure in open-cycle drilling in marine natural gas hydrates. The system comprises a drilling system, a drilling fluid injection system, and a data processing system for conducting the drilling operation.

Abstract: This application provides a method for detecting a battery state of health. In the method, for a battery that does not supply power to a load within a time period, a detected unit is determined; an open-circuit voltage and a temperature of the detected unit are collected; a battery state of charge value and a loss capacity of the detected unit are obtained by means of calculation; and a battery state of health value of the detected unit is obtained by means of calculation according to a ratio of the loss capacity of the detected unit to an original capacity. This application further provides an apparatus for detecting a battery state of health. By means of technical solutions provided in this application, a deterioration degree of battery performance can be accurately monitored, and impact on a service is avoided.

Abstract: An active control method and control device for wellbore pressure in the open-cycle drilling of marine natural gas hydrates comprises following steps: (1) optimized design of drilling parameter; (2) carry out open-cycle drilling according to the designed drilling parameters; (3) utilize the APWD to monitor the bottom-hole temperature and the bottom-hole pressure in real time for real-time correction of the wellbore annulus temperature and pressure calculation models; determine whether a hydrate decomposition has occurred in the annulus and then infer whether a shallow gas intrusion has occurred in the bottom hole; (4) Intelligent active control: control and adjust the mixed density of drilling fluid, the injection displacement of drilling fluid as well as the injection temperature of drilling fluid and the pump pressure in wellhead automatically during the well killing based on the real-time treatment results of the computer terminal for the signal fluctuations detected by the APWD.

Abstract: Estimating a battery state of health (SOH) is described. The state of heath is estimated by obtaining a partial charge or discharge capacity of a target battery in a state of charge (SOC) interval of each of a plurality of SOCs. First dV/dSOC data is separately calculated for each SOC in an mth preset battery capacity based on the mth preset battery capacity and the partial charge or discharge capacity in the SOC interval of each SOC. A smallest overall dV/dSOC data deviation is determined from all overall dV/dSOC data deviations corresponding to M preset battery capacities. A preset battery capacity is determined corresponding to the smallest overall dV/dSOC data deviation as a retention capacity of an aged target battery. The retention capacity of the aged target battery is divided by a retention capacity of the target battery in a new battery state, to obtain the SOH estimate of the target battery.