Abstract: A display substrate, a display panel and a display device are provided. The display substrate includes: a base substrate; a plurality of sub-pixels arranged in an array on the base substrate, wherein at least one sub-pixel includes a first electrode, the first electrodes of the sub-pixels in one of two adjacent rows of sub-pixels extend in a first direction, and the first electrodes of the sub-pixels in the other one of the two adjacent rows of sub-pixels extend in a second direction intersecting with the first direction; and a touch electrode and a plurality of touch lines, wherein the touch electrode includes a plurality of touch units, one touch unit is connected to at least one touch line, and different touch units are connected to different touch lines; and wherein each touch unit covers an even number of rows of sub-pixels.

Abstract: A full-electric drive cementing control system is disclosed.

Abstract: A combustion-gas supply system and a combustion-gas supply method thereof, a device equipped with a turbine engine, and a fracturing system are provided. The combustion-gas supply system includes a main pipeline and a multi-functional pipeline; the main pipeline includes a first sub-pipeline and a second sub-pipeline; the first sub-pipeline includes a first gas intake pipe, a first gas supply valve and a first gas outlet pipe arranged in sequence; the second sub-pipeline includes a combustion-gas supply valve and a gas supply pipe, the first gas outlet pipe is connected with the combustion-gas supply valve, the gas supply pipe is configured to be connected with a turbine engine, the multi-functional pipeline includes a second gas intake pipe, a second gas supply valve and a second gas outlet pipe arranged in sequence, and the second gas outlet pipe is communicated with the first gas outlet pipe.

Abstract: A continuous high-power turbine fracturing equipment may include a lubrication system, which may include a first lubrication unit configured to lubricate a plunger pump. The first lubrication unit may further include a high pressure lubrication unit. The high pressure lubrication unit may include a high pressure motor, a high pressure pump, and a high pressure oil line. The high pressure motor may be configured to drive the high pressure pump, which may be configured to pump high pressure lubricating oil into the high pressure oil line. The high pressure oil line may be configured to lubricate at least one of connecting rod bearing bushes or crosshead bearing bushes in the plunger pump.

Abstract: An invert emulsion having double particle size distribution, the invert emulsion having a particle size distribution of latex particles between 20 nm and 70 nm and between 100 nm and 500 nm in the same invert emulsion system. A preparation method for an invert emulsion comprises: forming an emulsion A and an emulsion B having different particle sizes by controlling an emulsifier system and an emulsification means, and preparing in one step an invert emulsion the particle size of which has bimodal distribution by means of a three-stage polymerization reaction between the emulsion A and the emulsion B in the same system. The invert emulsion is used as a water treatment flocculant, a sludge dewatering agent and a papermaking auxiliary agent, and in particular, the sludge dewatering agent fabricated from the invert emulsion is used for dewatering sludge.

Abstract: A high-power turbine fracturing system may include a lubrication system, which may include a first lubrication unit configured to lubricate a plunger pump. The first lubrication unit may further include a high-pressure lubrication unit. The high-pressure lubrication unit may include a high-pressure motor, a high-pressure pump, and a high-pressure oil line. The high-pressure motor may be configured to drive the high-pressure pump, which may be configured to pump high-pressure lubricating oil into the high-pressure oil line. The high-pressure oil line may be configured to lubricate at least one of connecting rod bearing bushes or crosshead bearing bushes in the plunger pump.

Abstract: A system for supplying combustion gas to a turbine engine for fracturing operation by fracturing manifold equipment is disclosed. The system may include a gas supply device, a gas delivery manifold, a filtering device, a gas detecting system and a connecting device. The gas delivery manifold, and the filtering device, and the gas detecting system are integrated on the fracturing manifold equipment. The gas supply device is connected to the gas delivery manifold through the filtering device. The gas delivery manifold supplies gas to the turbine engine through the connecting device. The disclosed system help reduce operational risk, save floor space, reduce wiring/routing of on-site delivery manifold, enhance connection efficiency, and reduce the complexity of wellsite installation.

Abstract: Cemented carbide powder compositions are provided for use in the production of various articles by one or more additive manufacturing techniques. In one aspect, a powder composition comprises sintered cemented carbide particles having at least a bimodal particle size distribution, wherein sintered cemented carbide particles of a first mode exhibit a D50 particle size of 25 ?m to 50 ?m, and sintered cemented carbide particles of a second mode exhibit a D50 of less than 10 ?m, and the powder composition has an apparent density of 3.5 g/cm3 to 8 g/cm3.