Abstract: Disclosed are a cross-flow air duct and an air outlet device. The cross-flow air duct includes a volute and a volute tongue. The volute includes a first body, a first side of the first body is an air inlet side, and a second side of the first body is an air outlet side. The volute tongue includes a second body, a first side of the second body is an air inlet side, and a second side of the second body is an air outlet side. An air inlet port is formed between the first sides, and an air outlet port is formed between the second sides. According to the cross-flow air duct, multiple groups of air outlet areas in different directions are formed, the air outlet width is enlarged as a whole, and the air supply range is increased.

Abstract: The present disclosure relates to a stator of a magnetic levitation bearing, a magnetic levitation bearing, and a compressor. The stator of the magnetic levitation bearing includes a stator core (4), a stator coil (5) wound around the stator core (4), a housing (2) sleeved outside the stator core (4) and having a clearance fit or a transition fit with the stator core (4), and a potting component (3) filled between the housing (2) and the stator core (4).

Abstract: A method for evaluating productivity of a heterogeneous gas reservoir considering interlayer crossflow is disclosed in the invention, and includes: (1) dividing a heterogeneous gas reservoir into multiple reservoir sections along the depth of the heterogeneous gas reservoir; (2) obtaining the productivity of each reservoir section according to data obtained through wireline formation test; (3) superimposing the productivity of all reservoir sections based on the water-electricity similarity principle to obtain the superimposed productivity of the heterogeneous gas reservoir; and (4) using an interlayer crossflow correction coefficient considering influence caused by the interlayer crossflow to obtain the corrected productivity of the heterogeneous gas reservoir.

Abstract: A method for monitoring and analyzing large tunnel machines based on automatic collection of big data includes the following steps: dividing a tunnel operation area, obtaining environmental information of a tunnel operation sub-area, analyzing rock drilling difficulty of the tunnel operation sub-area, confirming a tunnel operation trajectory, analyzing conformity of the tunnel operation sub-area, processing an abnormal tunnel operation sub-area, and analyzing health state of a tunnel rock drill. According to the present disclosure, a rock drilling difficulty coefficient of each tunnel operation sub-area is used to analyze a corresponding steel rotating speed, and then the tunnel operation trajectory is confirmed. After the tunnel operation is completed, the operation conformity of each tunnel operation sub-area is analyzed, and each abnormal tunnel operation sub-area is screened out and processed accordingly.

Abstract: Disclosed are a cross-flow air duct and an air outlet device. The cross-flow air duct includes a volute and a volute tongue. The volute includes a first body, a first side of the first body is an air inlet side, and a second side of the first body is an air outlet side. The volute tongue includes a second body, a first side of the second body is an air inlet side, and a second side of the second body is an air outlet side. An air inlet port is formed between the first sides, and an air outlet port is formed between the second sides. According to the cross-flow air duct, multiple groups of air outlet areas in different directions are formed, the air outlet width is enlarged as a whole, and the air supply range is increased.

Abstract: A method for evaluatingproductivity of a vertically heterogeneous gas reservoir considering interlayer crossflow is disclosed in the invention, and includes: (1) dividing a heterogeneous gas reservoir into multiple thin layersvertically; (2) obtaining the productivity of each thin layer according to data obtained through wireline formation test; (3) superimposing the productivity of all thin layers based on the water-electricitysimilarityprinciple to obtain the superimposed productivity of the heterogeneousgas reservoir; and (4) using an interlayer crossflow correction coefficient considering influence caused by the interlayer crossflow to obtain the corrected productivity of the heterogeneousgas reservoir.

Abstract: A whole-vehicle-based method for evaluating extreme pressure and antiwear properties of grease includes injecting the grease onto a key bearing pin and causing the engineering machine to operate without load is disclosed. The method includes causing the engineering machine to operate under a load of 10% to 150% rated load at least once, viewing and analyzing a wear condition of a surface of the bearing pin, and issuing a whole-vehicle-based evaluation report of extreme pressure and antiwear properties of grease. The engineering machine is caused to operate once under a load of 10% to 150% rated load for 0.5 min to 100 h.

Abstract: A laser cleaning method and device for improving uniformity of a laser cleaning surface are provided. The laser cleaning method includes: applying a peaked-top sine wave signal to a motor; controlling a galvanometer to swing in a reciprocated manner by the motor; shaping a laser beam emitted by a laser to a linear beam by the reciprocated swing of the galvanometer; and performing laser cleaning using the shaped linear beam.

Abstract: A dredging device for dredging a pipe is provided including: a carrying frame, adapted to connected to a pipe; a shaking dredging unit including a first shaking plate and a second shaking plate, and the first shaking plate and the second shaking plate are arranged within the pipe; and a driving unit, connected to the carrying frame. The driving unit is connected to the first shaking plate and the second shaking plate for driving the first shaking plate and the second shaking plate to reciprocate to approach or move away from each other.

Abstract: An acousto-optic Q switch, a resonant cavity, and a pulse laser device for improving laser device power. The acousto-optic Q switch includes: a transparent optical element configured to form a phase grating that diffracts laser; a piezoelectric transducer arranged at one end of the transparent optical element and configured to convert electrical energy into ultrasonic energy to form the phase grating in the transparent optical element; and an absorber arranged at the other end of the transparent optical element to absorb the ultrasonic energy.

Abstract: The present disclosure discloses a container positioning method and apparatus based on multi-line laser data fusion, the method comprising: acquiring point cloud data of at least two multi-line laser radars, and performing point cloud data fusion according to a coordinate system relationship between the at least two laser radars; performing clustering of scanning lines according to the fused point cloud data, and acquiring an edge point of a top surface or a side surface of a target container according to the clustered scanning lines; acquiring a contour of the top surface or the side surface of the target container according to the edge point of the top surface or the side surface of the target container to determine a central point and a heading angle of the target container so as to determine a position of the target container.

Abstract: The present disclosure relates to a stator of a magnetic levitation bearing, a magnetic levitation bearing, and a compressor. The stator of the magnetic levitation bearing includes a stator core (4), a stator coil (5) wound around the stator core (4), a housing (2) sleeved outside the stator core (4) and having a clearance fit or a transition fit with the stator core (4), and a potting component (3) filled between the housing (2) and the stator core (4).

Abstract: The present disclosure discloses a container positioning method and apparatus based on multi-line laser data fusion, the method comprising: acquiring point cloud data of at least two multi-line laser radars, and performing point cloud data fusion according to a coordinate system relationship between the at least two laser radars; performing clustering of scanning lines according to the fused point cloud data, and acquiring an edge point of a top surface or a side surface of a target container according to the clustered scanning lines; acquiring a contour of the top surface or the side surface of the target container according to the edge point of the top surface or the side surface of the target container to determine a central point and a heading angle of the target container so as to determine a position of the target container.

Abstract: A dredging device for dredging a pipe is provided including: a carrying frame, adapted to connected to a pipe; a shaking dredging unit including a first shaking plate and a second shaking plate, and the first shaking plate and the second shaking plate are arranged within the pipe; and a driving unit, connected to the carrying frame. The driving unit is connected to the first shaking plate and the second shaking plate for driving the first shaking plate and the second shaking plate to reciprocate to approach or move away from each other.

Abstract: A combustible ice efficient combustion system comprises a combustible ice storage unit and a combustion unit, the front end of the furnace of the combustion unit is provided with a combustor, the rear end of the furnace of the combustion unit is connected with a flue gas main pipe, the combustor is provided with a first fuel gas inlet, a second fuel gas inlet, a combustion-supporting gas inlet and a flue gas outlet, the first fuel gas inlet is provided with a combustion nozzle, the combustion nozzle is provided with a first gas inlet, a second gas inlet and a mixed gas outlet, the first gas inlet is connected with the combustible ice storage unit through a high-pressure natural gas pipeline, the second gas inlet is connected with an air source, and the mixed gas outlet is connected with the first fuel gas inlet of the combustor.

Abstract: A lithium-based grease and the preparation method thereof are provided. The raw materials for preparing the lithium-based grease include in parts by weight: 75-88 parts of base oil, 0.5-2.5 parts of antiwear agent, 0.1-1.5 parts of antirust agent, 0.1-1.5 parts of antioxidant, 5-25 parts of lubricant, 5-15 parts of thickening agent, and 0.6-2.0 parts of saponifying agent. The raw materials also include hydroxyl compound-containing modified graphene containing quaternary ammonium salt or aromatic ring. The grease has good colloid stability and mechanical stability, can greatly improve the antiwear property. More than that, the grease has excellent oxidation resistance, and can significantly shorten the reaction time of the saponification, reduce the reaction temperature of the saponification.

Abstract: Embodiments of the present disclosure relate to a method and apparatus for outputting information. The method can include: searching, in response to that user's behavior is preset repetitive behavior being detected, first guidance information matching the user's behavior in a preset guidance information set, where guidance information is used to guide a user to use speech instead of the preset repetitive behavior; and outputting the first guidance information.

Abstract: A whole-vehicle-based method for evaluating extreme pressure and antiwear properties of grease includes injecting the grease onto a key bearing pin and causing the engineering machine to operate without load is disclosed. The method includes causing the engineering machine to operate under a load of 10% to 150% rated load at least once, viewing and analyzing a wear condition of a surface of the bearing pin, and issuing a whole-vehicle-based evaluation report of extreme pressure and antiwear properties of grease. The engineering machine is caused to operate once under a load of 10% to 150% rated load for 0.5 min to 100 h.

Abstract: A laser cleaning system including a laser source, an energy-transferring optical fiber, a laser cleaning head, a coreless motor, a connection lens barrel, and a mirror.