Abstract: The disclosure provides an optical imaging system, which sequentially includes, from an object side to an image side along an optical axis: a diaphragm; a first lens with a refractive power, an image-side surface thereof being a convex surface; a second lens with a refractive power; a third lens with a negative refractive power; a fourth lens with a refractive power, an image-side surface thereof being a convex surface; a fifth lens with a refractive power, an object-side surface thereof being a concave surface; a sixth lens with a refractive power; and a seventh lens with a refractive power. EPD is an entrance pupil diameter of the optical imaging system, and a total effective focal length f of the optical imaging system and EPD satisfy f/EPD?1.5.

Abstract: The disclosure provides an optical imaging system, which has a first optical axis, a second optical axis perpendicular to the first optical axis and a third optical axis perpendicular to the second optical axis, the first optical axis is parallel to the third optical axis, the optical imaging system includes: a first imaging lens group, including a first refraction optical element that deflects light entering along a direction of the first optical axis to be propagated along a direction of the second optical axis; a second imaging lens group, sequentially including from an object side to an image side along the second optical axis a first lens to a seventh lens with refractive power; a third imaging lens group, including a second refraction optical element that deflects light entering along the direction of the second optical axis to be propagated along a direction of the third optical axis.

Abstract: The present disclosure provides an ultra-high temperature resistant cement slurry system for cementing and the preparation method and use thereof. The cement slurry system comprises cement, an ultra-high temperature strength stabilizer, an ultra-high temperature reinforcing material, a density regulator, an ultra-high temperature suspension stabilizer, a dispersant, a fluid loss additive, a retarder, a defoaming agent and water, wherein the ultra-high temperature suspension stabilizer comprises an ether-based starch, an aluminosilicate and a polyalcohol polymer. The method for preparing the cement slurry system includes dry mixing and wet mixing raw materials homogeneously, respectively, and then homogeneously mixing the dry mix and wet mix to obtain the cement slurry system. The present disclosure further provides use of the cement slurry system for cementing in deep wells and ultra-deep wells at high and ultra-high temperatures.

Abstract: The present disclosure discloses an optical imaging lens assembly including a first lens, a second lens, a third lens, a fourth lens, and a fifth lens, which are sequentially arranged from an object side to an image side along an optical axis. The first lens has positive refractive power, and an object-side surface of the first lens is a convex surface. The second lens has refractive power, and an image-side surface of the second lens is a concave surface. The third lens has refractive power. The fourth lens has refractive power. The fifth lens has negative refractive power. A total effective focal length f of the optical imaging lens assembly and a combined focal length f123 of the first lens, the second lens and the third lens satisfy 0.6<f/f123<1.

Abstract: The disclosure provides an optical imaging lens assembly, which sequentially includes from an object side to an image side along an optical axis: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens, wherein the fifth lens has a negative refractive power; an object-side surface of the sixth lens is a concave surface, and an image-side surface of the sixth lens is a convex surface; a maximum field of view FOV of the optical imaging lens assembly satisfies 100°<FOV<120°; ImgH is a half the diagonal length of an effective pixel region on an imaging surface of the optical imaging lens assembly, and ImgH satisfies ImgH>4.5 mm; and a total effective focal length f of the optical imaging lens assembly and an Entrance Pupil Diameter (EPD) of the optical imaging lens assembly satisfy f/EPD<2.

Abstract: The disclosure discloses an optical imaging lens group, which sequentially includes from an object side to an image side along an optical axis: a first prism has a first reflective surface; a first lens has a refractive power and an object-side surface thereof is a convex surface; a second lens has a refractive power; a third lens has a refractive power, an object-side surface thereof is a concave surface and an image-side surface thereof is a convex surface; a fourth lens has a refractive power; a fifth lens has a refractive power; and a second prism has a second reflective surface. An optical distortion Dist. of the optical imaging lens group satisfies: |Dist.|<0.1%.

Abstract: The present disclosure discloses an optical imaging lens assembly including, sequentially from an object side to an image side along an optical axis, a first lens having positive refractive power with a convex object-side surface; a second lens having refractive power; a third lens having refractive power; a fourth lens having refractive power with a convex object-side surface and a concave image-side surface; a fifth lens having positive refractive power; and a sixth lens having negative refractive power with a convex object-side surface, wherein a distance TTL along the optical axis from the object-side surface of the first lens to an imaging plane of the optical imaging lens assembly, half of a diagonal length ImgH of an effective pixel area on the imaging plane, and half of a maximal field-of-view Semi-FOV of the optical imaging lens assembly satisfy TTL/ImgH<1.6, and 4.5 mm<f*tan(Semi-FOV)<7 mm.

Abstract: The disclosure provides an optical imaging system, which sequentially includes, from an object side to an image side along an optical axis: a diaphragm; a first lens with a refractive power, an image-side surface thereof being a convex surface; a second lens with a refractive power; a third lens with a negative refractive power; a fourth lens with a refractive power, an image-side surface thereof being a convex surface; a fifth lens with a refractive power, an object-side surface thereof being a concave surface; a sixth lens with a refractive power; and a seventh lens with a refractive power. EPD is an entrance pupil diameter of the optical imaging system, and a total effective focal length f of the optical imaging system and EPD satisfy f/EPD?1.5.

Abstract: An inflation method for an air cushion body which includes one or more air storing units formed by at least two air cell films, an inflation valve formed by at least two valve films, and an inflation unit integrally connected with the air storing units and formed by two inflation end portions overlapping with each other to define an inflation channel, includes the following steps: sealing off two ends of the inflation channel to form an inflatable cavity, filling air into the inflatable cavity where the air that enters the inflatable cavity enters the corresponding air storing units through the air inlet channel, and releasing the two ends of the inflation channel upon completion of inflation to acquire the air cushion body that is inflated.

Abstract: Disclosed are a circuit board assembly and a rice cooker, where the circuit board assembly includes: a housing, including a circuit board bracket and a fireproof cover fixing and covering the circuit board bracket, where the fireproof cover and the circuit board bracket are enclosed to define a fireproof cavity; and a circuit board, mounted on the circuit board bracket and accommodated in the fireproof cavity. The present disclosure provides a fireproof cover made of a fireproof material on the circuit board. The fireproof cover and the circuit board bracket may be fixed and covered to define a fireproof cavity, and the circuit board may be accommodated in the fireproof cavity. In this way, the circuit board may be isolated from the outside, to prevent the fire from spreading when the circuit board catches fire, to ensure the safety of users' lives and property.

Abstract: An air cushion packaging box includes at least one inflatable main body and at least one box body. The inflatable main body is provided with at least one inflating valve to inflate the inflatable main body. The inflatable main body is provided in the box body to form an integral structure with the box body, so as to provide air cushion effect to packaged items after the inflatable main body is inflated. The box body is automatically opened when the inflatable main body is inflated to enhance the use of the air cushion packaging box.

Abstract: The disclosure provides an optical imaging system, which has a first optical axis, a second optical axis perpendicular to the first optical axis and a third optical axis perpendicular to the second optical axis, the first optical axis is parallel to the third optical axis, the optical imaging system includes: a first imaging lens group, including a first refraction optical element that deflects light entering along a direction of the first optical axis to be propagated along a direction of the second optical axis; a second imaging lens group, sequentially including from an object side to an image side along the second optical axis a first lens to a seventh lens with refractive power; a third imaging lens group, including a second refraction optical element that deflects light entering along the direction of the second optical axis to be propagated along a direction of the third optical axis.

Abstract: The disclosure provides an optical imaging lens assembly, which sequentially includes from an object side to an image side along an optical axis: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens, wherein the fifth lens has a negative refractive power; an object-side surface of the sixth lens is a concave surface, and an image-side surface of the sixth lens is a convex surface; a maximum field of view FOV of the optical imaging lens assembly satisfies 100°<FOV<120°; ImgH is a half the diagonal length of an effective pixel region on an imaging surface of the optical imaging lens assembly, and ImgH satisfies ImgH>4.5 mm; and a total effective focal length f of the optical imaging lens assembly and an Entrance Pupil Diameter (EPD) of the optical imaging lens assembly satisfy f/EPD<2.

Abstract: Disclosed is a cooking appliance that includes a cooker body assembly, a lid assembly, a weighing sensor, a first control panel, and a second control panel. The cooker body assembly includes a housing and an inner pot disposed inside the housing. The lid assembly can be opened and closed to cover the inner pot. The first control panel is disposed on the lid assembly, and the second control panel is disposed on the housing. The weighing sensor is electrically connected to the second control panel. According to this disclosure, the second control panel is disposed on the housing, so that the second control panel does not flip to the rear side together with the lid assembly when the lid assembly is opened to add food or water.

Abstract: The disclosure provides an optical imaging lens assembly, which sequentially includes, from an object side to an image side along an optical axis, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens with refractive power respectively, wherein TTL is a distance from an object-side surface of the first lens to an imaging surface of the optical imaging lens assembly on the optical axis, and ImgH is a half of a diagonal length of an effective pixel region of the optical imaging lens assembly, TTL and ImgH meet TTL/ImgH?1.2; a total effective focal length f of the optical imaging lens assembly and an entrance pupil diameter (EPD) of the optical imaging lens assembly meet f/EPD?1.8; Semi-FOV is a half of a maximum Field of view (FOV) of the optical imaging lens assembly, Semi-FOV and f meet f×tan(Semi-FOV)>4.6 mm.

Abstract: The disclosure discloses an optical imaging lens group, which sequentially includes from an object side to an image side along an optical axis: a first prism has a first reflective surface; a first lens has a refractive power and an object-side surface thereof is a convex surface; a second lens has a refractive power; a third lens has a refractive power, an object-side surface thereof is a concave surface and an image-side surface thereof is a convex surface; a fourth lens has a refractive power; a fifth lens has a refractive power; and a second prism has a second reflective surface. An optical distortion Dist. of the optical imaging lens group satisfies: |Dist.|<0.1%.

Abstract: An air cushion packaging box includes at least one inflatable main body and at least one box body. The inflatable main body is provided with at least one inflating valve to inflate the inflatable main body. The inflatable main body is provided in the box body to form an integral structure with the box body, so as to provide air cushion effect to packaged items after the inflatable main body is inflated. The box body is automatically opened when the inflatable main body is inflated to enhance the use of the air cushion packaging box.

Abstract: The present disclosure discloses an optical imaging lens assembly including, sequentially from an object side to an image side along an optical axis, a first lens having positive refractive power with a convex object-side surface; a second lens having refractive power; a third lens having refractive power; a fourth lens having refractive power with a convex object-side surface and a concave image-side surface; a fifth lens having positive refractive power; and a sixth lens having negative refractive power with a convex object-side surface, wherein a distance TTL along the optical axis from the object-side surface of the first lens to an imaging plane of the optical imaging lens assembly, half of a diagonal length ImgH of an effective pixel area on the imaging plane, and half of a maximal field-of-view Semi-FOV of the optical imaging lens assembly satisfy TTL/ImgH<1.6, and 4.5 mm<f*tan(Semi-FOV)<7 mm.

Abstract: The present disclosure discloses an optical imaging lens assembly including a first lens, a second lens, a third lens, a fourth lens, and a fifth lens, which are sequentially arranged from an object side to an image side along an optical axis. The first lens has positive refractive power, and an object-side surface of the first lens is a convex surface. The second lens has refractive power, and an image-side surface of the second lens is a concave surface. The third lens has refractive power. The fourth lens has refractive power. The fifth lens has negative refractive power. A total effective focal length f of the optical imaging lens assembly and a combined focal length f123 of the first lens, the second lens and the third lens satisfy 0.6<f/f123<1.

Abstract: A control method of a cooking appliance includes acquiring a current weight of a container of the cooking appliance with a food material through a weighing device of the cooking appliance, calculating a weight of the food material in the container according to the current weight of the container with the food material and an initial weight of the container without the food material, and determining a calorie amount of the food material according to the weight of the food material and a type of the food material.