Abstract: The present invention belongs to the technical field of liquid-cooling heat dissipation, wherein discloses a novel mechanical pump liquid-cooling heat dissipation system, comprising an external radiator, a circulating pipe and a mechanical pump, wherein the circulating pipe communicates the external radiator with the circulating pipe to form a circulation loop, the mechanical pump includes a volute in the form of a hollow cylinder, a fixing surface is formed at one end of the volute, the fixing surface is planar and is part of the outer surface of the volute, a layer of heat-conducting silicone grease is coated on the fixing surface, the fixing surface and a heat source are fixed through pressure lamination, and the heat-conducting silicone grease is attached to the fixing surface and the heat source; and the mechanical pump takes away heat of the heat source and transfers it to a cooling working medium while pumping the cooling working medium to circulate in the circulation loop.

Abstract: A micro-hydraulic suspension mechanical pump includes a volute, an upper cover, an impeller, a brushless motor, a waterproof sleeve and water lubrication spiral groove thrust bearings, each having stationary and rotating rings. A water inlet and a water outlet channel are provided on the volute, and a middle water inlet hole is formed on the upper cover. The water lubrication spiral groove thrust bearings are provided above and below a magnetic steel rotor. During operation of the micro-hydraulic suspension mechanical pump, a liquid film is formed between the stationary ring and the rotating ring to enable the magnetic steel rotor to be suspended, and a liquid film is formed between the outer wall of the rotor sleeve and the inner wall of the waterproof sleeve. Due to suspension of the rotor, wear caused contact is avoided, and service life of the micromechanical pump is improved.

Abstract: A micro hydraulic suspension mechanical pump with a volute, an upper cover, an impeller, a brushless motor, a waterproof sleeve and the water lubrication spiral groove thrust bearings, in which a water inlet channel and a water outlet channel are provided on the volute, and a middle water inlet hole is formed on the upper cover. The brushless motor includes a motor shell, a coil, a magnetic steel rotor, a waterproof sleeve, a rotor sleeve and a rotor rotating shaft; and above and below the magnetic steel rotor are respectively provided one water lubrication spiral groove thrust bearing. A liquid film can be formed between the stationary ring and the rotating ring to enable the magnetic steel rotor to be suspended, and a liquid film can also be formed between the outer wall of the rotor sleeve and the inner wall of the waterproof sleeve.

Abstract: Provided is a PRCA-based method for dynamically reestablishing a PET image. The method comprises: (1) performing collection and correction to obtain a coincidence counting matrix; (2) performing correction restriction on a PET measurement equation; (3) performing iterative estimation on PET dynamic concentration data; and (4) reestablishing each frame of PET image. In the present invention, different frames of collected data are regarded as a whole for reestablishment, and the relevancy of the PET data in time is fully used, so that the obtained result can embody the characteristic that the dynamic PET can show the time change of a target region; and secondly, in the present invention, a background and target region method is used, the interference to the target region caused by the background is reduced, in addition, the time and space correction are added in the reestablishment, the accuracy of the reestablishment result is higher, and the contrast between the target region and the background is improved.

Abstract: Provided is a PRCA-based method for dynamically reestablishing a PET image. The method comprises: (1) performing collection and correction to obtain a coincidence counting matrix; (2) performing correction restriction on a PET measurement equation; (3) performing iterative estimation on PET dynamic concentration data; and (4) reestablishing each frame of PET image. In the present invention, different frames of collected data are regarded as a whole for reestablishment, and the relevancy of the PET data in time is fully used, so that the obtained result can embody the characteristic that the dynamic PET can show the time change of a target region; and secondly, in the present invention, a background and target region method is used, the interference to the target region caused by the background is reduced, in addition, the time and space correction are added in the reestablishment, the accuracy of the reestablishment result is higher, and the contrast between the target region and the background is improved.