Abstract: The present invention discloses a rapid dot matrix micro-nano impact indentation testing system. The rapid dot matrix micro-nano impact indentation testing system comprises a three-dimensional electric positioning module, wherein the three-dimensional electric positioning module comprises an XY translation stage and a Z-axis lifting stage; a dot matrix impact indentation module, wherein the dot matrix impact indentation module comprises a three-degree-of-freedom piezoelectric platform arranged on the Z-axis lifting stage, one surface of the three-degree-of-freedom piezoelectric platform is provided with a piezoelectric ceramic actuator, and one end of the piezoelectric ceramic actuator is connected to an indenter; a clamp, wherein the clamp clamps a test piece, and the test piece faces the indenter; and an imaging module, wherein the imaging module comprises a microscope lens.

Abstract: The present invention discloses a pin-on-disk type in-situ current-carrying friction testing system, and belongs to the technical field of friction performance testing. The friction testing system includes a pin-on-disk type friction pair, a current loading mechanism, and a magnetic field generating mechanism. The current loading mechanism includes a conductive terminal abutting against an annular sidewall of a disk specimen and used to guide a current in the disk specimen to flow along a horizontal direction, and the magnetic field generating mechanism is used to generate a magnetic field. When a pin specimen and a disk specimen rotate relatively, the pin specimen, the conductive terminal, and the magnetic field generating mechanism are relatively stationary, and an Ampere force generated by the current in the disk specimen flowing in the horizontal direction under the action of the magnetic field faces a support platform.

Abstract: The disclosure relates to the technical field of batteries, and provides a battery and a battery manufacturing method. The battery includes a cell, and the cell includes a cell body and a tab. The tab extends from the cell body, and the tab includes a first solder mark and a second solder mark. The second solder mark covers the first solder mark, and the second solder mark is formed with a circumferentially closed space to expose the first solder mark. That is, when welding the tab and the cover plate assembly, the tab is welded twice, and a hollow second solder mark is formed.

Abstract: A method and system for control of BTM of electric drive bulldozers based on deep learning includes: obtaining a micro-load segment at the current moment in a load spectrum and predicting a micro-load segment at the next moment using a Markov chain model; carrying out a weighting calculation of the segment using the segment at the current moment and a corresponding weight thereof with the predicted segment and a corresponding weight thereof, and then calculating motor speed, motor torque, and a state of charge (SOC) of battery under the segment after being weighted; and taking a real-time battery outlet water temperature, occupant cabin temperature, occupant cabin target temperature and ambient temperature as well as the motor speed, motor torque and SOC, so as to obtain a control strategy of the electric compressor speed, and further obtain a method for control of BTM of the electric drive bulldozer.

Abstract: A method and a system for controlling combustion of a natural gas engine. The method includes: determining, based on a current operation parameter of a natural gas engine, an operation state of the natural gas engine, and calculating a total injection quantity of natural gas and pilot diesel required by the natural gas engine in the operation state; adopting a direct injection diffusion-combustion mode in a case that the operation state is an idle state or a low load state; adopting a natural gas homogeneous hybrid active control compression-ignition mode in a case that the operation state is a medium load state; configuring the total injection quantity into three parts including a compression-ignition natural gas injection quantity, a pilot diesel injection quantity, and a diffusion-combustion natural gas injection quantity in a case that the operation state is a high load state, and sequentially injecting them into a combustion chamber.

Abstract: A ceiling lamp may include: a base plate and a light emitting component arranged on the base plate. The ceiling lamp further includes a diffusing structural member, arranged outside the light emitting component and configured to evenly diffuse light emitted by the light emitting component; and a light transmitting structural member, arranged outside the diffusing structural member. The light transmitting structural member is provided with a microprism structure, and is configured to allow the light evenly diffused by diffusing structural member to form into a pattern corresponding to the microprism structure on the light transmitting structural member.

Abstract: A ceiling lamp may include: a base plate and a light emitting component arranged on the base plate. The ceiling lamp further includes a diffusing structural member, arranged outside the light emitting component and configured to evenly diffuse light emitted by the light emitting component; and a light transmitting structural member, arranged outside the diffusing structural member. The light transmitting structural member is provided with a microprism structure, and is configured to allow the light evenly diffused by diffusing structural member to form into a pattern corresponding to the microprism structure on the light transmitting structural member.