7 results about "Fine grain" patented technology

The present invention relates to a continuous data protection system and method combining with a snapshot technology. The system comprises a client, a server side, a specialized storage device which can be communicated with each other through a network, and the method combines instantaneous recovery properties of the snapshot storage and I / O level of fine grain recovery properties of a block-level CDP technology. The method is applied to data backup and data recovery. Compared with the prior art, the continuous data protection system and method disclosed by the present invention have advantages such as saving time, saving a storage space, and the like.

The invention discloses a target wireless device positioning method based on regional division. The method comprises a step 1 of dividing a square target region to obtain N*N square unit subregions, a step 2 of calculating a search curve of an air vehicle in a target region, and a step 3 of taking the center of a unit subregion nearest to the air vehicle as a starting point and positioning each target wireless device in the unit subregions in such a manner that the air vehicle orderly searches the unit subregions in the target region. The target wireless device positioning method based on regional division is characterized in that all target wireless devices can be detected in the flight process, a fine-grained map of any point is provided and the positioning accuracy is improved. Meanwhile, the air vehicle is controlled to directly fly towards the target by thoroughly utilizing the directionality of the received signals and by use of regional division based flight line algorithm; compared with the existing warflying method, the target wireless device positioning method based on regional division has the advantages that the traversing scanning of the target region according to a predetermined space filling curve is avoided, the total flight distance is reduced and the power consumption of the air vehicle is reduced.

The invention discloses a preparation method of a dual-scale titanium alloy material. The preparation method comprises the following steps that titanium alloy powder as the raw materials is subjected to low-temperature ball-milling, and fine-grain titanium alloy powder is obtained; the fine-grain titanium alloy powder and the titanium alloy powder as the raw materials are mixed, and the fine-grain titanium alloy powder in the mixed powder accounts for 5-95 wt%; and the mixed powder is subjected to degassing in a premade graphite mould, the degassed mixed powder is sequentially subjected to surface activation and discharge plasma activated sintering (PAS), and the dual-scale titanium alloy material is obtained. The production process is concise, short in period and high in structure controllability, and the compactness and mechanical property of the titanium alloy material can be effectively improved; and in the obtained dual-scale dual-phase titanium alloy material, dual-scale crystal grains are evenly distributed, the comprehensive mechanical performance is excellent, majority of industrial requirements are met, and the preparation method capable of achieving the industrially applied dual-scale titanium alloy material is provided.

The present invention provides a fine grain surface layer steel part having a high proof strength ratio equal to or higher than that of conventional quenched and tempered materials, that is, a fine grain surface layer steel part containing, by mass %, C: 0.45% to 0.70%, Nb: 0.01% to 0.60%, Si: 0.10% to 1.50%, Mn: 0.40% to 2.0%, P: 0.10% or less, S: 0.001% to 0.15%, and N: 0.003% to 0.025% and having a balance of Fe and unavoidable impurities, where the surface layer and inside at all or part of the part have structures of different average particle sizes of ferrite crystal grains surrounded by high angle grain boundaries of a misorientation angle of 15 degrees or more and a method of production of that part comprising warm forging locations where strength is required to a predetermined shape at 1000° C. to 800° C. during which working so as to give an equivalent strain of 1.5 or more.

The invention discloses a blast furnace cloth belt fly ash flotation reagent and an application method thereof, and relates to the technical field of blast furnace cloth belt fly ash flotation, the blast furnace cloth belt fly ash flotation reagent comprises a collecting agent, an inhibitor, an activating agent, a dispersing agent, an adjusting agent and a foaming agent; the collecting agent is amodified oil-based collecting agent, wherein the content of the collecting agent is 10-30 parts by weight; the inhibitor is a zinc mineral inhibitor, and the content of the inhibitor is 1-15 parts byweight; the activating agent is a fine particle carbon powder activating agent, and the content of the activating agent is 1-5 parts by weight; the dispersing agent is a fine-grain mineral dispersingagent, and the content of the dispersing agent is 5-20 parts by weight; the content of the regulator is 1-5 parts by weight, and the content of the foaming agent is 0.1-0.5 part by weight. The invention provides the blast furnace cloth belt fly ash flotation reagent. The flotation reagent can give full play to the synergistic effect of all the components, is good in selectivity and high in collecting performance, has a very good flotation effect on secondary carbon of blast furnace fine-grained fly ash, can achieve the concentrate carbon grade of 70% or above and the recovery rate of 74% or above, can well inhibit floating of zinc minerals, and can achieve efficient zinc mineral enrichment.