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119results about How to "Avoid quantity" patented technology

Method and system for suppressing subsynchronous resonance of compensated transmission system

The invention provides a method and system for suppressing subsynchronous resonance of a compensated transmission system. The method includes: collecting rotor-side three-phase current Irabc, stator-side three-phase current Isabc and stator-side three-phase voltage Usabc of a grid-side converter of a double-feed fan of the compensated transmission system; subjecting Irabc, Usabc and Isabc to Clarke transmission to acquire rotor-side current Irabeta, stator-side current Isabeta and staor-side Usabeta under two-phase stationary coordinates; according to a rotor current reference value Irabeta<*> and Irabeta, acquiring a first feedforward control component; calculating a second feedforward control component according to equivalent reactance parameters, leakage coefficients and Irabeta of the rotator side; according to equivalent reactance parameters of the stator side, common reactance of the stator side and the rotor side and Isabeta and Usabeta, calculating flux control components of the stator side; according to the first feedforward control component, the second feedforward control component and flux control components, calculating control voltage Urabeta<*> of the rotor side; performing space vector modulation on Urabeta<*> to acquire switching control signals of the grid-side converter to suppress the subsynchronous resonance of the compensated transmission system.
Owner:NORTH CHINA ELECTRICAL POWER RES INST +2

Foldable cellular phone device

The invention relates to a foldable cellular phone device with a cellular phone component, provided with an earpiece, said foldable cellular phone device comprising a housing having a first housing element, having first and second faces; and a second housing element having third and fourth faces, wherein a first user interface is mounted within said first housing element and is accessible on said first face; wherein a second user interface is mounted within said second housing element and is accessible on said third face; wherein said first housing element and said second housing element are coupled together by a swivel hinge, such that said first housing element and said second housing element can rotate about a first axis of said swivel hinge between a first closed position and a first open position, wherein in said first closed position said first housing element and said second housing element are folded together such that the first face and said third face are conformingly adjacent to each other enclosing said first user interface and said second user interface between said first housing element and said second housing element, and wherein in said first open position said first housing element and said second housing element are folded open with said first and said second housing elements being angularly displaced about said first axis from said first closed position to an angle between 90 and 180 degrees such that said first and said third face are arranged oppositely, wherein said swivel hinge further couples said first housing element and said second housing element such that said first housing element can rotate about a second axis of said swivel hinge perpendicular to said first axis between a first rotation position and a second rotation position of said first housing element, as defined relative to said second housing element, wherein in said first open position and said first closed position said first element is in said first rotation position.
Owner:NOKIA CORP

Processing method for livestock and poultry died of illness

The invention discloses a processing method for livestock and poultry died of illness. The processing method comprises the following steps that livestock and poultry died of illness are disintegrated through a disintegrator; disintegrated dead bodies are loaded into an disintegrated material receiving device; the disintegrated dead bodies are put into a drying chamber and subjected to direct sterilization drying through hot gas with the temperature being 120-320 DEG C, and grease flowing out in the sterilization drying process is collected and utilized; meat, hairs, bones and other substances subjected to sterilization drying are subjected to squeezing processing; the grease and surplus materials are obtained after squeezing processing, and after being smashed, the obtained surplus materials are added with a mixture to be made into raising raw materials; 100 mass parts of the raising raw materials are added with 0.5-1 mass part of EM original liquor, the raising raw materials and the EM original liquor are mixed and then ferment for 3-5 days, and raising materials with the water content being 55 wt%-70 wt% is prepared; black soldier flies are inoculated in the raising materials, and the raising materials are used for supplying food to black soldier fly larvae; after the raising materials are converted into small-granular residues, the larvae and the residues are separated, and the black soldier fly bodies and the surplus residues are obtained; and the surplus residues are used for making organic fertilizers.
Owner:HUNAN LUSHI ENVIRONMENT PROTECTION TECH CO LTD

Image-forming apparatus for use with negatively-charged toner and featuring a negatively-chargeable image-bearing member, and process cartridge using same

An image-forming apparatus includes an image-bearing member for holding thereon an electrostatic latent image; a charging device for electrostatically charging a surface of the image-bearing member; an exposure unit for forming the electrostatic latent image on the image-bearing member by exposing to light the image-bearing member having been charged by the charging device; and a developing unit which has at least a toner-carrying member for carrying and transporting a negatively-chargeable toner thereon and developing the electrostatic latent image by a contact developing system to form a toner image. In the triboelectric series relationship between the toner and a surface layer of the image-bearing member, the surface layer of the image-bearing member has a charge polarity which is a different polarity with respect to the charge polarity of the toner in the developing unit. The image-bearing member includes the electrostatic latent image including a surface potential, as a nonimage area potential (Vd) within a range of -500 to -800 V, and as an image area potential (Vl), at which the maximum toner image density is to be obtained, within a range of -50 to -200 V. A process cartridge includes the above-described image-bearing member.
Owner:CANON KK

Ink jetting printing head correction method, apparatus and system

The invention relates to an ink jetting printing head correction method, apparatus and system, a computer apparatus and a storage medium. The method comprises the steps of controlling nozzles of an ink jetting printing head to drop ink droplets on a test substrate; detecting and obtaining the number of the ink droplets dripping on the test substrate, and determining the actual using number of thenozzles on the ink jetting printing head according to the number of the ink droplets; determining whether the actual using number of the nozzles is the same as the target using number of the nozzles or not; and if the actual using number of the nozzles is not the same as the target using number of the nozzles, correcting the current actual using number of the nozzles of the ink jetting printing head to be the same as the target using number. The above method ensures that the actual using number of the nozzles of the ink jetting printing head is the same as the target using number, the problemthat the current actual using number of the nozzles of the ink jetting printing head is not the same as the target using number due to person operation negligence, and consequently a device for ink jetting printing preparation is abnormal is solved, and the accuracy of the using number of the nozzles in ink jetting printing is improved.
Owner:GUANGDONG JUHUA PRINTING DISPLAY TECH CO LTD

Novel heat pipe steam boiler

The invention discloses a novel heat pipe steam boiler which is formed by a valley point electricity heating and heat storing system, a steam generating and circulating system and a heat pipe heat-transferring group. A hot end of the heat pipe heat-transferring group is located in the valley point electricity heating and heat storing system; a cold end of the heat pipe heat-transferring group is located in the steam generating and circulating system; the valley point electricity heating and heat storing system comprises a soft water pipe, a water tank, a water supply pump, a water inlet pipe,a discharge pipe, a boiler barrel, a steam pipeline, an external steam-water separator, a hot water pipeline and a heat consumer; and the steam generating and circulating system comprises a feed inlet, a tank body, an electric heating device, heat storage molten salt, external thermal insulation and a discharge outlet. The novel heat pipe steam boiler provided by the invention solves the problemsthat a valley point electricity heat storing device in the prior art is small in heat transfer coefficient, low in heat storing efficiency and incapable of producing high-pressure steam, and the current situations of fume corrosion and erosion cannot be avoided since a heat pipe boiler can only apply fume heating.
Owner:大连市锅炉压力容器检验研究院
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