Abstract: The present disclosure discloses a preview-image display while a terminal device photographs a picture. The method comprises: obtaining, by a terminal device, a first preview image and a second preview image, wherein the first preview image is based on a current picture in a first mode and the second preview image is based on the current picture in a second mode; and displaying, by the terminal device, a first part of the first preview image and a second part of the second preview image in a preview area, wherein the first part of the first preview image and the second part of the second preview image constitute a third preview image based on the current picture.

Abstract: A walking power control system for wolfberry picking, including a frame, a turntable, rotating rods, first gears, second gear, gear racks, supporting rods, hydraulic motors, a front traveling wheel, a left traveling wheel and a right traveling wheel. Hydraulic motors rotate to drives three traveling wheels to rotate, thereby driving the frame to move, when it is necessary to turn, a turntable is rotated, the turntable rotates to drive two first gears to rotate, and the two first gears rotate to drive the supporting rods to rotate, thereby driving the left traveling wheel and the right traveling wheel to rotate, so that the traveling direction of the frame is changed.

Abstract: Provided are compositions and methods for enhanced prime editing, which include a pegRNA that encodes a target mutation in a target protein, along with one or more nearby silent or conservative mutations. These silent mutations can increase the editing efficiency, without causing a change to the target protein sequence. Also provided are compositions and methods of using the improved prime editing for preventing or treating infections by SARS-CoV or SARS-CoV-2.

Abstract: A crystalline form of phenyl bis (2,4,6-trimethylbenzoyl) phosphine oxide, with a large particle size, which belongs to a triclinic crystal system and space group P-1. A crystallization method for making the crystalline form of phenyl bis (2,4,6-trimethylbenzoyl) phosphine oxide, comprising adding a solid of phenyl bis (2,4,6-trimethylbenzoyl) phosphine oxide to a solvent and mixing; followed by heating to 50 to 70° C. to achieve complete dissolution; cooling the solution to room temperature; and adding an anti-solvent to the resulting solution to cause precipitation of crystals. The crystals are allowed to grow at a constant temperature for 10 to 60 minutes, so as to give a slurry containing the crystals. Said slurry is subjected to filtration and then drying to obtain the crystalline form of phenyl bis (2,4,6-trimethylbenzoyl) phosphine oxide.

Abstract: A method for the treatment of silicon-containing wastewater from the preparation of a molecular sieve or a catalyst includes the step of contacting the silicon-containing wastewater with at least one acid or at least one alkali, so that at least a part of the silicon elements in the silicon-containing wastewater form a colloid. A mixture containing a colloid is thus obtained. A silicon-containing solid phase and a first liquid phase are produced by a solid-liquid separation. A solid phase and a second liquid phase are produced by a solid-liquid separation after at least a part of the metal elements in the first liquid phase form a precipitate. At least a part of the second liquid phase is subjected to electrodialysis to produce an acid liquor and/or an alkali liquor. The silicon-containing solid phase can be used as the raw material for a molecular sieve synthesis.

Abstract: The present disclosure discloses a walking power control system for wolfberry picking, including a frame, a turntable, rotating rods, first gears, second gear, gear racks, supporting rods, hydraulic motors, a front traveling wheel, a left traveling wheel and a right traveling wheel. In the present disclosure, hydraulic motors rotate to drives three traveling wheels to rotate, thereby driving the frame to move, when it is necessary to turn, a turntable is rotated, the turntable rotates to drive two first gears to rotate, and the two first gears rotate to drive the supporting rods to rotate, thereby driving the left traveling wheel and the right traveling wheel to rotate, so that the traveling direction of the frame is changed. The picking speed of wolfberries is greatly improved, thereby improving the working efficiency and saving a lot of human resources.

Abstract: A crystalline form of phenyl bis (2,4,6-trimethylbenzoyl) phosphine oxide, with a large particle size, which belongs to a triclinic crystal system and space group P-1. A crystallization method for making the crystalline form of phenyl bis (2,4,6-trimethylbenzoyl) phosphine oxide, comprising adding a solid of phenyl bis (2,4,6-trimethylbenzoyl) phosphine oxide to a solvent and mixing; followed by heating to 50 to 70° C. to achieve complete dissolution; cooling the solution to room temperature; and adding an anti-solvent to the resulting solution to cause precipitation of crystals. The crystals are allowed to grow at a constant temperature for 10 to 60 minutes, so as to give a slurry containing the crystals. Said slurry is subjected to filtration and then drying to obtain the crystalline form of phenyl bis (2,4,6-trimethylbenzoyl) phosphine oxide.

Abstract: A process for ion-exchanging an exchangeable-ion containing solid material, characterized in that said process include a bipolar membrane electrodialysis step, which comprises subjecting an aqueous ion-containing solution to a bipolar membrane electrodialysis to produce an acid liquid; an ion-exchange step, which comprises contacting the exchangeable-ion containing solid material with the acid liquid and conducting the ion-exchange to produce a slurry containing the ion-exchanged solid material; a solid-liquid separation step, which comprises subjecting the slurry containing the ion-exchanged solid material to a solid-liquid separation to produce a solid phase and a liquid phase, adjusting the liquid phase to a pH of 4-6.5, and subjecting the pH-adjusted liquid phase to a solid-liquid separation to produce a treatment liquid. Oxalic acid is used in at least one of the bipolar membrane electrodialysis step, the ion-exchange step, and the solid-liquid separation step.

Abstract: A method for the treatment of silicon-containing wastewater from the preparation of a molecular sieve or a catalyst includes the step of contacting the silicon-containing wastewater with at least one acid or at least one alkali, so that at least a part of the silicon elements in the silicon-containing wastewater form a colloid. A mixture containing a colloid is thus obtained. A silicon-containing solid phase and a first liquid phase are produced by a solid-liquid separation. A solid phase and a second liquid phase are produced by a solid-liquid separation after at least a part of the metal elements in the first liquid phase form a precipitate. At least a part of the second liquid phase is subjected to electrodialysis to produce an acid liquor and/or an alkali liquor. The silicon-containing solid phase can be used as the raw material for a molecular sieve synthesis.

Abstract: A process for ion-exchanging an exchangeable-ion containing solid material involves several steps. There is a bipolar membrane electrodialysis step, which involves subjecting an aqueous ion-containing solution to a bipolar membrane electrodialysis to produce an acid liquid. The process also contains an ion-exchange step, during which the exchangeable-ion containing solid material is contacted with the acid liquid to conduct ion-exchange to produce a slurry containing the ion-exchanged solid material. It further include a solid-liquid separation step, during which the slurry containing the ion-exchanged solid material is subject to a solid-liquid separation to produce a solid phase and a liquid phase. The pH value of the liquid phase is adjusted to 4-6.5. The pH-adjusted liquid phase is further subject to a solid-liquid separation to produce a treatment liquid.

Abstract: An engine includes cylinders using pressure differences to motivate the pistons. Each cylinder has a first outlet in its' first end, the first outlet being coupled to a vacuum chamber via a first valve and a first conduit, a second outlet in the cylinder's first end, the second outlet being coupled to an air pressure chamber via a second valve and a second conduit, a third outlet in the cylinder's second end, the third outlet being coupled to the vacuum chamber via a third valve and a third conduit, and a fourth outlet in the cylinder's second end, the fourth outlet being coupled to the air pressure chamber via a fourth valve and a fourth conduit. The valves are electrically controlled by a processor. When the first and fourth valves are turned on, the piston is pulled forward by a pressure difference created by the vacuum chamber and is at the same time pushed forward by a pressure difference created by the air pressure chamber.