219results about How to "Guaranteed ratio" patented technology

The invention provides a method and a device for controlling the flow of a network working under a full duplex model. The method comprises the following steps that: each communication node transmits a detection packet to an opposite end node after the flow control is triggered; the communication node transmits response to the opposite end node after receiving the detection packet; the communication node calculates the time difference between the time of receiving the response and the time of transmitting the detection packet relative to the response after receiving the response, and compares the time difference with a first threshold; and the communication node reduces the speed of transmitting and receiving data when the time difference is larger than the first threshold. The method can intelligently regulate the speed of transmitting and receiving data according to the network state and effectively solve the influence on client machines when a great number of data is transmitted, is more flexible compared with the method of purely limiting the transmission speed, and can also ensure the proportion reserved for the client machines to use the network bandwidth.

The invention discloses an aluminium alloy with high forming property for an automobile body plate, comprising the following chemical constituents in percentage by weight: 0.50-1.20wt% of Si, 0.35-0.70wt% of Mg, 0.01-0.20wt% of Cu, 0.05-0.20wt% of Mn, less than or equal to 0.10wt% of Cr, 0.01-0.25wt% of Zn, less than or equal to 0.15wt% of Ti, 0.05-0.15wt% of Fe and the balance of Al. The aluminium alloy material of the invention has lower yield strength before baking finish, which is favourable for stamping shaping; and after baking finish, the yield strength is improved. The material has higher forming property and simultaneously satisfies the requirements of the impact resistance of the automobile body plate.

A mask machine comprises the following parts: a control module, a shell part, a juicing mechanism, a stirring mechanism, a mask forming mechanism, a cleaning mechanism and a liquid discharge mechanism. The mask machine possesses automatic cleaning function and realizes the dismounting-free cleaning purpose. Further, by arranging a screw conveying device, the problem that a mask juice cannot be smoothly conveyed is solved. Further, by arranging a quantitative metering device, the proportions of raw materials are strictly guaranteed, and the mask quality is guaranteed.

A method and apparatus for provide highly efficient traffic routing for a wide range of possible traffic matrices (TM) in an intra-domain network. That routing optimally balances the traffic loads over a range of traffic matrices so as to minimize the deviation for any particular traffic matrix from the optimal routing. Such a routing provides a guaranteed performance ratio against the best possible network routing. The invention utilizes a method of optimally configuring a traffic network based on solving a linear program to obtain the optimal routing, and then configuring the routing on the network accordingly.

The invention relates to a magnesia carbon brick and a preparation method thereof. The magnesia carbon brick is prepared from, by weight, 60%-75% of fused magnesite particles, 10%-30% of fused magnesite fine powder, 5%-10% of carbon, 1%-5% of an antioxidant, 1%-3% of a binding agent and 0.4%-1% of furfural waste liquid. In the preparation process, the fused magnesite particles are placed in a mixing mill to be dry-mixed for 2-15 min, then phenolic resin and the furfural waste liquid are added to continue to be mixed for 5-15 min, then carbon is added to the mixture, mixing is carried out for 5-15 min, finally the fused magnesite fine powder and the antioxidant are added to continue to be mixed for 8-15 min, pug is formed, the rotating speed of the mixing mill is set to range from 950 r/min to 1,000 r/min, mixing time ranges from 10 min to 60 min, and the magnesia carbon brick is prepared after compression moulding and drying solidification. The preparation method is simple, the steps are easy to operate, the uniformity of mixed materials of the magnesia carbon brick is improved, the quality of the mixed materials of the magnesia carbon brick is improved, the labor intensity of workers is lowered, the use amount of phenolic resin is reduced, and due to the addition of the furfural waste liquid, the material mixing process is more even, and phenolic resin is prevented from being caked.

The invention provides a method for preparing a high-toughness eutectic high-entropy alloy based on a selective laser melting technology, and belongs to the technical field of metal material laser additive manufacturing. The molar ratio of the AlCoCrFeNi pre-alloy powder to the Ni powder is controlled, the proportion of all elements in the eutectic high-entropy alloy is guaranteed, and a complete eutectic structure is obtained in the alloy; by optimizing the technological parameters of selective laser melting forming, the compactness of the eutectic high-entropy alloy is improved, meanwhile, the residual stress in the eutectic high-entropy alloy is reduced, cracks are prevented from being formed in the alloy, the obtained eutectic high-entropy alloy can achieve high compactness without subsequent treatment, the mechanical property of the eutectic high-entropy alloy is improved, and integrated precision forming of the high-strength and high-toughness eutectic high-entropy alloy complex structural part is achieved. The result of the embodiment shows that the density of the eutectic high-entropy alloy prepared through the preparation method is larger than 98%, the yield strength is larger than 970 MPa, and the tensile strength is larger than or equal to 1270 MPa.

The invention relates to a preparation method of C.I. pigment yellow 151, which comprises the steps of: taking phthalimide and NaOX as starting materials to prepare strong-basicity solution of o-aminobenzoic acid; dissolving a coupling component 5-acetyl acetamido benzimidazolone (AABI) in the strong-basicity solution without acid precipitation; diazotizing and coupling under a proper pH condition; synthesizing the pigment for once; and optionally pigmenting and surfacing to obtain the C.I. pigment yellow 151. The technology is simplified, the ice use cost is saved, the use level of acid and alkali is greatly reduced, the production waste water is greatly reduced, the good economic benefit is obtained, and the environmental harmfulness is greatly reduced.

The invention discloses a method for producing a feed of high-yield dairy cows by using corn straws fermented by Rhodotorula glutinis. The method comprises the following steps of: activating a yeast strain to obtain a corn straw material fermented by the Rhodotorula glutinis by adding aqueous solution, uniformly mixing 40 to 60 weight percent of corn material, 5 to 10 weight percent of cottonseedmeal, 5 to 12 weight percent of distillers dried grains with soluble, 10 to 20 weight percent of concentrated feed and 20 to 30 weight percent of corn straw material fermented by the Rhodotorula glutinis to obtain a mixture, feeding the mixture into a solid fermentation chamber and fermenting, drying a fermented solid feed, crushing, adding a silage into the solid feed, and mixing and stirring uniformly and packaging to obtain the feed of the high-yield dairy cows. In the method, the corn straws are fermented by a biological strain and then are taken as a feed raw material, so that the cost is reduced, the nutrition is rich and easy to absorb, and the method is favorable for improving the milk yield of dairy cows.

The invention discloses a production method of a twin-structure hard alloy matrix, which comprises the following steps: proportioning, ball milling, granulating, pressure molding, sintering and the like. The WC adopted in the proportioning step is composed of 17 wt% of coarse-grain WC and 3 wt% of fine-grain WC. The tungsten carbide crystal grains in the twin-structure hard alloy prepared by the method have two grain sizes, and the coarse-grain tungsten carbide is uniformly distributed in the fine-grain tungsten carbide. The coarse-grain tungsten carbide has the advantages of complete crystal, fewer defects and fewer borders. The higher-proportion coarse-grain tungsten carbide provides favorable tipping resistance for the matrix material; and the fine-grain tungsten carbide provides favorable wearability for the matrix. Therefore, by adopting the coarse/fine tungsten carbide proportion, the matrix material has favorable comprehensive properties, and can be used in the field of steel turning coated tips.

The invention relates to a pulverization matching-type multi-inlet medium ejector which comprises a pipe body, a nozzle and at least two pulverization branch pipes, wherein the nozzle and the pulverization branch pipes are respectively and hermetically communicated with the pipe body; the pipe body is provided with a vacuum chamber as well as a nozzle hole and a venturi which are respectively and hermetically communicated with the vacuum chamber; the nozzle is arranged in the nozzle hole, and an atomizing nozzle is aslant communicated with the side periphery of the vacuum chamber; the free ends, which are located outside and inside the vacuum chamber, of the atomizing nozzle are respectively an outer port and an inner port; the interior axes of the pulverization branch pipes are provided with pulverization sticks; the free ends, which are located at the inner port, of the pulverization stick are provided with pulverization heads. The pulverization branch pipes are transformed into a pulverization device provided with the pulverization sticks, so that the flow velocity and pulverization degree of different steam or fluids which flow through the two pulverization branch pipes are adjusted by virtue of adjusting the positions of the pulverization heads in the inner port, and the different adjusting schemes of the pulverization sticks in the two pulverization branch pipes can be used for ensuring the matching of the fluids which enter into the ejector.

The invention discloses high-strength austenitic stainless steel for an economical railway vehicle and a manufacturing method thereof. The high-strength austenitic stainless steel comprises the following chemical components in percentage by mass: 0.03-0.12% of C, 0.4-0.8% of Si, 8.5-14.5% of Mn, 14.0-15.5% of Cr, 1.2-1.8% of Ni, 0.15-0.25% of N, V not more than 0.15%, Ti not more than 0.10%, V+Ti not less than 0.05%, Cu not more than 0.60%, P not more than 0.03%, S not more than 0.01%, and the balance of Fe and inevitable impurities; the room-temperature yield strength is not less than 400 MPa; the tensile strength is not less than 700 MPa; and the ductility is not less than 35%. The stainless steel is applied to the railway vehicle, and can reduce the manufacturing cost under the precondition of satisfying the safety requirement; and the stainless steel is applied to a railway truck, can improve the strength when guaranteeing the economy and the service life, and improves the vehicle lightness level.

The invention discloses a two-stage text feature selection method under an unbalanced data set, and belongs to the field of text feature selection in natural language processing. According to the invention, word segmentation preprocessing is carried out on training set data according to category labels; an initial feature set Ti is formed for each category, a CHI method based on word frequency isused for carrying out first-stage local feature selection on Ti, and then an improved IG method is used for carrying out second-stage global feature selection on a result obtained after first-stage feature selection. The invention relates to a feature selection method considering global and local features. The proportion of the features in the small class samples in the final feature set is ensured; a comparison experiment is performed on the method and three related feature selection methods on a news corpus with a label provided by a Sogou laboratory, a result shows that the method is superior to the compared methods in precision ratio, recall ratio and F1 value, and the classification accuracy of the unbalanced data set is improved.

The invention discloses a preparation method of a soft moisturizing cotton towel and the soft moisturizing cotton towel. The method comprises the steps of preparing an all-cotton spunlaced nonwoven fabric; performing unwinding; applying a moisturizing emulsion; drying the all-cotton spunlaced nonwoven fabric coated with the moisturizing emulsion; and performing processes of winding, slitting, finishing and the like on the dried all-cotton spunlaced nonwoven fabric. Main components of the moisturizing emulsion are a humectant, lipids and pure water. A method for adding a moisturizing solution incudes a padding method, an impregnation method, a roll coating method, a printing method, a stamping method, a dry cloth spraying method and a wet cloth spraying method, and the addition amounts ought to be designed in the seven methods respectively ensure the proportion of the moisturizing solution on the soft cotton towel, so that the moisturizing emulsion can completely permeate an inner layerof the fabric, fibers are fully moistened, and the overall softness characteristic of the interior and exterior of the soft cotton towel can be ensured after drying.