55results about How to "Achieve strict control" patented technology

The invention discloses a liquid nitrogen container and a cryogenic vial pick-and-place device. The liquid nitrogen container comprises a container body, and further comprises a rotary disc, a cryopreservation frame, a central shaft and a driving assembly, wherein an opening is formed in the container body; the rotary disc is arranged in the container body; the cryopreservation frame is supported by the rotary disc and comprises a plurality of layers of placement faces; the included angle between each placement face layer and the rotary disc is 40-60 degrees; the central shaft is perpendicularly arranged with and fixedly connected with the rotary disc; the driving assembly is electrically connected with the central shaft and used for driving the central shaft to rotate; and the central shaft is used for driving the cryopreservation frame to rotate through the rotary disc to reach the opening of the container body. By adoption of the liquid nitrogen container and the cryogenic vial pick-and-place device, the workload of operating personnel is reduced, the error rate of manual picking of cryogenic vials is lowered, and the potential safety hazard for the operating personnel is avoided. The liquid nitrogen container and the cryogenic vial pick-and-place device are particularly suitable for the work of picking cryogenic vials in a high-capacity biological sample bank, and meet the technical requirement for storage in the high-capacity biological sample bank.

The invention provides a full-automatic bar bonding unit for bonding crystal bars. The full-automatic bar bonding unit for bonding the crystal bars comprises a material base feeding mechanism, a crystal bar feeding mechanism, a splitting mechanical arm, a jig return line, bar bonding machines, a truss mechanical arm, a pre-curing assembly line and a digital curing library, wherein the splitting mechanical arm is used for grabbing material bases provided by the material base feeding mechanism, the two ends of the jig return line are connected to the splitting mechanical arm and the crystal bar feeding mechanism in a butt joint mode respectively, a sliding rail of the truss mechanical arm is arranged above the feeding end of the bar bonding machines and above the crystal bar feeding mechanism, the feeding ends of the pre-curing assembly line correspond to the discharging ends of the bar bonding machines, the discharging end of the pre-curing assembly line is located below the splitting mechanical arm, and the feeding end of the digital curing library is connected to the splitting mechanical arm in a in butt joint mode. The full-automatic bar bonding unit has the advantages that automation and manpower minimization of bar bonding procedures can be realized, the labor intensity of workers can be reduced, and meanwhile, the production efficiency can be greatly improved.

The invention discloses a technical standard based on a three-dimensional cylinder liner inner-hole platform honing reticulate pattern. A contact or non-contact three-dimensional roughness measuring apparatus is adopted to test the cylinder liner inner-hole platform honing reticulate pattern, provide two-dimensional and three-dimensional scanning patterns, read out three-dimensional parameters to form a technical standard, and evaluate the platform honing reticulate pattern; the three-dimensional parameters of the technical standard includes the parameters that evaluates the surface defects, reticulate-pattern angle, functional parameters, the degree of three-dimensional surface skewness and the three-dimensional root mean square deviation of the surface. The application of three-dimensional parameters change the theoretical defect of former two-dimensional parameters, and more universality can be achieved when the requirement of cylinder-liner reticulate pattern is satisfied. The invention replaces traditional double-membrane testing method, a three-dimensional roughness measuring apparatus is used to change the situation of poor efficiency and limited precision of reticulate-pattern testing method; rigid control of the quality of cylinder liner can be achieved based on the features of fine structure such as piece cap, rough peak valley and other quantitative requirements.

The invention discloses a simply-supported slab bridge jack-up method and a height-adjustable combined cushion structure applied therein. The simply-supported bridge jack-up method includes: firstly, setting up distributive girders under a girder, arranging jacks and putting up temporary supports, and then entirely synchronously jacking up a simply-supported slab to the height 1-3mm higher than design elevation; preliminarily supporting the bridge by the aid of the height-adjustable combined cushion structure and supports prior to performing zero-clearance girder falling to the designed elevation, and then demounting the jacks and the temporary supports. The height-adjustable combined cushion structure comprises a precast portion composed of precast supports and a height-adjustment combined mechanism capable of adjusting the height of the precast supports and a cast-in-situ portion coating a height-adjustable mechanism and part of the precast supports. The simply-supported slab bridge jack-up method and the height-adjustable combined cushion structure applied therein have the advantages of high applicability, controllable security, high construction precision, high operability, high economical efficiency, good application prospect and the like, thereby being capable of being used in support replacement projects of expressways and the bridges of urban roads and especially applicable to jack-up engineering when jack-up height of a sole-across simply-supported girder (slab) is larger than the stroke of one jack.

An electric motor comprising a stator assembly; a rotor assembly; and a support body. The stator assembly comprises a plurality of stator elements having poles and coils, and the rotor assembly comprises a shaft to which is mounted at least a first and a second bearing mounted either side of a permanent magnet. The support body comprises an elongate central part, and first and second bearing seatspositioned axially at opposite ends of the elongated central part to each other, and the elongate central part defines a plurality of openings each configured to receive one of the plurality of stator elements secured by welding or adhesive. The body may have reinforcing ribs and one of the bearing supports may mount a fan shroud for a compressor application.

The invention discloses a production device of a catalyst for cyclohexene preparation through benzene selective hydrogenation and a method utilizing the device to prepare the catalyst. The production device comprises a high-pressure reaction system, a vacuum system, a control system and a tank system, can achieve multiple purposes through one kettle and one tank and is simple and convenient to operate. The preparation method comprises the operating steps of burdening, precipitation reaction, ageing, reduction and washing, and a prepared catalyst is stable in activity and suitable for industrial production and application.

The invention discloses a chlorinated butyl rubber synthesizing process and belongs to the technical field of chemical synthesis. The chlorinated butyl rubber synthesizing process includes two series processes, namely butyl rubber chlorination and neutralization of chlorinated mixed liquid. The process utilizes a pipeline type reactor to enable a C12 alkane solution and a butyl rubber alkane solution to be mixed and perform the chlorination, then utilizes the other pipeline type reactor and introduces alkali liquor into the reactor to start neutralization reaction after the solution stays for 6-60 seconds in a follow-up pipeline, and finishes the reaction after reaction solution stays for 20-300 seconds in the follow-up pipeline. The process has the advantages that the reaction speed is quick, the reaction time is short and can be accurately controlled, the conversion from a main product replaced by meso-position chlorine to a by-product replaced by primary-position chlorine is inhibited, and indexes of an obtained product are excellent.

The invention discloses a synthesis technique of brominated butyl rubber, belonging to the technical field of rubber synthesis. The technique comprises two serial processes comprising bromination of butyl rubber and neutralization of brominated mixture solution. According to the technique, alkane solution of bromine is mixed with alkane solution of butyl rubber in a pipeline reactor, subjected to the bromination, remained for 6s-60s in the subsequent pipeline, introduced into alkali liquor by another pipeline reactor, subjected to the neutralization, and remained for 20s-300s in the subsequent pipeline, then the reaction is finished. The technique has the following characteristics of high reaction speed, short reaction time and exact control, and is suitable for inhibiting the transformation from secondary-bromine substituted principal product to primary-bromine substituted side product; and each index of the obtained product is excellent.

The invention provides a method, device, and system for controlling device access authority. The method comprises: acquiring basic data of authority control of an accessed device; binding a port withthe accessed device and determining whether binding is carried out successfully; if so, carrying out authorization on the accessed device according to an access port type and access authority requirement data; carrying out detection continuously and keeping a current VLAN state of the port, and detecting port collision statistics data, effectiveness of the identity state of the accessed device, and the online state of the accessed device; determining whether to cancel the access authority of the accessed device and dividing the port to a controlled VLAN based on the port type under the condition of meeting the cancelling condition; and cancelling binding between the port and the accessed device. Therefore, the full process including access authorization of the accessed device, illegal access prevention, and authorization cancellation is controlled and thus the legal accessed device is able to but is only able to obtain the access authority within a permission range, so that the illegalaccessed device is prevented from obtaining the access authority the same as the authorizing device and thus the safety of the Ethernet terminal device is improved substantially.

The invention discloses a granularity-controllable sodium citrate refining process and an implementing device. The process comprises the following steps: preparing an anhydrous sodium citrate crude product solution, performing decoloring treatment so as to obtain fine filtrate, concentrating the fine filtrate so as to obtain a vicious liquid, performing cooling crystallization so as to obtain wet sodium citrate granules, performing centrifugal treatment on the wet sodium citrate granules, and performing vibration fluidizing drying, thereby obtaining pure sodium citrate crystal granules. By adopting the process, preparation steps and purification processes are optimized, particularly key process parameters of concentration and crystallization are optimized, the purity of the prepared sodium citrate is greater than 99.9% and is as high as 99.99%, the yield of the sodium citrate is greater than 69%, and the sodium citrate is controllable in particle size range, simple in production process, low in cost, simple and feasible to operate, environmentally friendly and safe.

An information processing device for executing reproduction processing of content recorded in an information recording medium, includes: a data processing unit for acquiring content codes including a program or application information to be applied to the recording content of the information recording medium, and executing data processing in accordance with the acquired content codes; wherein the data processing unit is configured so as to execute the verification processing of a digital signature which allows tampering verification of the entire content codes included in a content code file storing the content codes, and as the verification result, execute data processing in accordance with the content codes on the condition that validity of the content code file has been confirmed.

The invention discloses a synthesis technique of brominated butyl rubber, belonging to the technical field of rubber synthesis. The technique comprises two serial processes comprising bromination of butyl rubber and neutralization of brominated mixture solution. According to the technique, alkane solution of bromine is mixed with alkane solution of butyl rubber in a pipeline reactor, subjected to the bromination, remained for 6s-60s in the subsequent pipeline, introduced into alkali liquor by another pipeline reactor, subjected to the neutralization, and remained for 20s-300s in the subsequent pipeline, then the reaction is finished. The technique has the following characteristics of high reaction speed, short reaction time and exact control, and is suitable for inhibiting the transformation from secondary-bromine substituted principal product to primary-bromine substituted side product; and each index of the obtained product is excellent.

The technical problem to be solved by the invention is to provide a test device and a test method for a flowing water grouting reinforcement model of a water-rich fractured rock stratum. The test device comprises a grouting model system, an underground flowing water supply system, a grouting system, a ground stress loading simulation system, a monitoring system and a standard test piece processing system, a top plate of the grouting model system is provided with a water filling nozzle, and the upper end and the lower end of the side wall are respectively provided with a grouting hole and a grout outlet; the underground dynamic water supply system is communicated with the water injection port through a water injection pipe, and the water pressure and the water speed are adjusted in a combined adjusting mode; the grouting system is communicated with the grouting opening through a grouting pipe, and the grouting pressure and the flow speed are adjusted through the power system; the ground stress loading simulation system is used for carrying out stress loading on the top plate of the device; the monitoring system monitors grouting and stratum parameters; and the standard test piece processing system is used for preparing a reinforcing body standard test piece. The device can effectively simulate grouting reinforcement of broken surrounding rocks under complex flowing water and ground stress conditions, and can effectively research the reinforcement effect.

The invention discloses a device for simulating the influence of different illumination conditions on water body nutritive salt. An exhaust opening and a sample inlet are formed in the top end of a container, a light source is mounted at the top inside the container, the side wall of the container is provided with multiple sample taking openings and wrapped by an interlayer, an aeration device is arranged in the container, a rotating shaft is connected with a stirring paddle, and blades of the stirring paddle are of hollow structures and provided with air outlets; an illuminance controller is connected with the light source in the container; a circulating water bath device is connected with a water inlet and a water outlet of the container respectively; a temperature controller is connected with a temperature probe in the container, and the temperature controller is connected with the circulating water bath device simultaneously; a dissolved oxygen controller is connected with a nitrogen-oxygen gas mixture conveying device and controls the nitrogen-oxygen gas mixture conveying device to conduct aeration on a water sample in the container through the rotating shaft and the aeration device; the dissolved oxygen controller is connected with a dissolved oxygen detector; a nitrogen-phosphorus detector is used for detecting the nitrogen-phosphorus concentration of the water sample in the container; a pH value controller is connected with a pH value detector.

The invention discloses a method for producing nano cerium oxide under the supergravity action. In a supergravity field, cerous nitrate or cerium chloride is used as a raw material, an alkaline liquidsuch as urea and ammonium bicarbonate is used as a uniform precipitant, a precursor is prepared in deionized water by controlling the pH value of a reaction solution, impurity removal and neutralization of the precursor are realized through ultrasonic washing, and nano cerium oxide particles are prepared finally through firing. The particle size and the distribution condition of the precursor arestrictly controlled by use of the improved supergravity method and control of the precipitation environment, so that the particle size distribution condition of the finally product, namely, nano cerium oxide particles, is strictly controlled, and the nano cerium oxide particles with controllable particle size and very narrow distribution are obtained. The homogenous precipitation process can be realized in polar solvent deionized water in a breakthrough manner, the production process is safe and reliable, the reliability is significantly improved, and the method is applicable to industrial production.

The invention provides a shaping processing method and a shaping processing device for metal bipolar plate welding warpage. The inner stress of a metal bipolar plate shaping welding area is removed byadopting a 'point-to-point' resistor element heating manner, and a protection gas circuit provides a protection gas field, so that the surface quality of a metal bipolar plate during the heat treatment process is ensured. The invention provides the shaping processing method and the shaping processing device for metal bipolar plate welding warpage. The shaping processing method and the shaping processing device for metal bipolar plate welding warpage are suitable for metal bipolar plates used for fuel cells, local and automatic welding warpage shaping processing can be realized on the premiseof unchanging the welding process, and the metal bipolar plate welding warpage of the fuel cells is efficiently processed, so that the demand on high-accuracy preparing the metal bipolar plates of thefuel cells on a large scale can be met.

The invention discloses a heating intelligent power distribution system for houses. The heating intelligent power distribution system includes a host computer controller, an electric heating power acquisition controller, a temperature controller terminal, and an electric heating device. The electric heating power acquisition controller receives node information of the temperature controller terminal, monitors, controls, and configures power of each node and priority control level or other parameters, and the signal acquisition end of the temperature controller terminal is arranged beside the electric heating device to acquire the temperature signals of the electric heating device. The heating intelligent power distribution system makes full use of the existing wired network or is free of wiring, and can conveniently, rapidly, and reliably realizes the household heating remote control and intelligentization.

The invention relates to an error automatic warning method for self-defined error range system of metering equipment, comprising the following steps: initiating a metering equipment information management module; setting error range of the metering equipment; carrying out measurement to obtain the measurement result; detecting whether the measurement result exceeds error range or not according to the set error range, if yes, carrying out early warning and making corresponding responses, if not, making no responses and entering next step of operation procedure. Compared with the prior art, the method of the invention is efficient, reliable and can carry out early warning in response to measurement result exceeding error range, thus realizing strict control over the measurement result of the metering equipment.

The invention discloses an energy-saving and environment-friendly fuel gas burner. The energy-saving and environment-friendly fuel gas burner comprises a fuel gas mixing chamber, a combustion chamberand an air blower, wherein an adjusting ring is connected above the fuel gas mixing chamber in a sleeved mode, the combustion chamber is arranged above the adjusting ring in a penetrating mode, and acleaning rotating ring is connected to the outer wall of the combustion chamber in a sleeved mode; the interior of the cleaning rotating ring is connected with an ignition tube in a penetrating mode,one end, away from the cleaning rotating ring, of the ignition tube is connected with an ignition control button in a sleeved mode, one end, away from the adjusting ring, of the fuel gas mixing chamber is sleeved with an air regulating ring, and one side, away from the fuel gas mixing chamber, of the air regulating ring is connected with the air blower in a penetrating mode; and the interior of the air regulating ring is movably connected with a telescopic ring, and the outer wall of the telescopic ring is connected with a sleeve ring in a sleeved mode. The fuel gas burner is a device for converting a heat energy through a chemical reaction mode of burning a substance, namely air and fuel are mixed and blended according to a proper proportion through a premixing device so that the air andthe fuel can be fully combusted, the combustor is used for feeding fuel and air into a hearth according to the required concentration, speed, turbulence degree and mixing mode.

The invention discloses a using method of a ritodrine hydrochloride injection and a special infusion pump thereof. The invention firstly applies the infusion pump in the injection of the ritodrine hydrochloride injection. The infusion pump includes an infusion pump main body structure, and the interior of the infusion pump main body structure is provided with an automatic control device for controlling the injection flow rate and the injection time. The medical staff just needs to carry out the simple operation according to a pre-set process table on the automatic control device, and then the injection of the ritodrine hydrochloride can be accurately and safely realized. When the pre-set process table is not applicable to a particular patient, the infusion flow rate and the time can be regulated, thus allowing the infusion pump to be operated automatically according to the procedure after the adjustment. The infusion pump overcomes the difficulty of the shortage of the hospital medical staff, eliminates the differences of the infusion sets with the different specifications during the infusion process, significantly improves the safety of the clinical application of the ritodrine hydrochloride injection and reduces the maternal and the fetal personal dangerousness.

The invention discloses an intelligent alloy plate hammer manufacturing system and method. The intelligent alloy plate hammer manufacturing system comprises a temperature detection module, a clock module, a PLC, a deoxidization module, an alarm module, a heating module and a refrigeration module. The temperature detection module detects temperature values in a medium-frequency electric induction furnace, a sand box and a refrigeration box, and the clock module comprises a timer 01 arranged in the sand box, a timer 02 arranged in a heat treatment furnace and a timer 03 arranged in the refrigeration box and is used for relevant timing. The PLC controls the deoxidization module, the alarm module, the heating module and the refrigeration module to perform relevant operations according to the temperature values in the medium-frequency electric induction furnace, the sand box and the refrigeration box and predetermined timing information. The intelligent alloy plate hammer manufacturing system can strictly control various parameters including temperatures, time, material adding dosage and the like in the manufacturing process, reduce the error rate and improve the manufacturing efficiency and the quality of an alloy plate hammer, further greatly decreases the working amount of an operator, achieves highly automatic manufacturing process and improves the manufacturing efficiency.

The invention discloses an alloy plate hammer intelligent preparation method. A temperature detection module respectively detects the temperature value inside a medium-frequency induction furnace, a sandbox and a refrigeration box; a clock module comprises a timer 01 arranged inside the sandbox, a timer 02 arranged inside a heat processing furnace and a timer 03 arranged inside a refrigeration box, which are used for timing; a PLC controls a deoxygenation module, an alarm module, a heating module and a refrigeration module to perform related operations according to temperature inside the medium-frequency induction furnace, the sandbox and the refrigeration box and the preset timing information. The alloy plate hammer intelligent preparation method can strictly control the parameters of the temperature, the time and the dosage of the materials during the preparation procedure, reduces the fault rate, improves the preparation efficiency and the alloy plate hammer quality, greatly reduces the work load of the operation staff, realizes the high automation level of the preparation process and improves the preparation efficiency.

The invention relates to a plant online nuclear magnetic resonance imaging detection analyzing device under artificial climate, which comprises an artificial climate box and a nutrient solution oxygenation circulating mechanism, wherein the nutrient solution oxygenation circulating mechanism is installed inside a box body; the nutrient solution oxygenation circulating mechanism comprises a magnetic body box and a nuclear magnetic resonance test tube with a funnel-type plastic tube on the upper part; an upper cover and the lower bottom of the magnetic box body are respectively provided with a round mouth, and the nuclear magnetic resonance test tube is arranged inside the magnetic body box; and the device also comprises a nuclear magnetic resonance radio-frequency probe; the nuclear magnetic resonance radio-frequency probe wraps the nuclear magnetic resonance test tube; the bottom of the nuclear magnetic resonance test tube is connected with a nutrient solution vessel through a hose via an electromagnetic valve; the funnel-type plastic tube on the top of the nuclear magnetic resonance test tube is connected with a water pump which is arranged inside the nutrient solution vessel through a hose; and the nutrient solution vessel is connected with an air pump through a hose. The plant online nuclear magnetic resonance imaging detection analyzing device has beneficial effects that the technical bottleneck for bioassay of plant roots can be broken through, and the real-time monitoring of the state of the water plant roots can be realized without complicated operation.

The invention is suitable for the technical field of thermotechnical automatic control, and provides a flexible regulation and control method for a CO2 trapping system of a coal-fired power plant for strictly controlling the carbon emission. The method comprises the following steps: S1, selecting a controlled variable and a control variable of a large coal-fired power plant CO2 capture system; s2, under the open-loop condition, inputting M sequence signals into the coal feeding amount, the water feeding flow, the opening degree of a main steam valve, the barren solution flow and the steam extraction flow of a reboiler; and s3, utilizing an n4sid algorithm in an MATLAB identification toolbox to obtain a state space model of the CO2 capture system of the coal-fired power plant. By establishing a predictive controller based on an amplification state space model, the control problems of strong coupling, large delay and strong system constraint of the CO2 capture system of the coal-fired power plant can be effectively solved, the dynamic adjustment quality is improved, meanwhile, soft constraint of output variables is added to performance indexes, the capture rate of the system is maintained between [ymin, ymax], the fluctuation of the CO2 capture rate is greatly reduced, and the strict control of carbon emission is realized.

The invention belongs to the technical field of alloy preparation, and provides a nickel-based high-temperature alloy and a preparation method thereof. The nickel-based high-temperature alloy comprises the following components in percentage by mass: 0.07-0.10% of C, 0 < Si < = 1.00%, 0 < Mn < = 1.50%, less than or equal to 0.020% of P, less than or equal to 0.005% of S, 19.0-23.0% of Cr, 31.0-34.5% of Ni, 0 < Cu < = 0.75%, 0.15-0.60% of Al, 0.15-0.60% of Ti and the balance of Fe. The mass percentage content of Ni is adjusted to 31.0-34.5%, meanwhile, P is controlled to be smaller than or equal to 0.020%, S is controlled to be smaller than or equal to 0.005%, and the mechanical property is improved. The embodiment shows that the tensile strength of the obtained nickel-based high-temperature alloy is larger than or equal to 460 MPa, the specified plastic extension strength is larger than or equal to 180 MPa, and the section elongation is larger than or equal to 35%.

The invention discloses a technical standard based on a three-dimensional cylinder liner inner-hole platform honing reticulate pattern. A contact or non-contact three-dimensional roughness measuring apparatus is adopted to test the cylinder liner inner-hole platform honing reticulate pattern, provide two-dimensional and three-dimensional scanning patterns, read out three-dimensional parameters toform a technical standard, and evaluate the platform honing reticulate pattern; the three-dimensional parameters of the technical standard includes the parameters that evaluates the surface defects, reticulate-pattern angle, functional parameters, the degree of three-dimensional surface skewness and the three-dimensional root mean square deviation of the surface. The application of three-dimensional parameters change the theoretical defect of former two-dimensional parameters, and more universality can be achieved when the requirement of cylinder-liner reticulate pattern is satisfied. The invention replaces traditional double-membrane testing method, a three-dimensional roughness measuring apparatus is used to change the situation of poor efficiency and limited precision of reticulate-pattern testing method; rigid control of the quality of cylinder liner can be achieved based on the features of fine structure such as piece cap, rough peak valley and other quantitative requirements.

The invention discloses a preparation method of a high-strength magnetically soft alloy bar, wherein a high-strength magnetically soft alloy is prepared by optimizing chemical components and a process, and the high-strength magnetically soft alloy bar comprises the following components in percentage by mass: less than or equal to 0.04% of C, less than or equal to 0.30% of Si, less than or equal to 0.30% of Mn, less than or equal to 0.020% of P, less than or equal to 0.020% of S, less than or equal to 0.20% of Cu, less than or equal to 0.50% of Ni, 48.0-51.0% of Co, 1.80-2.10% of V, 0.1-0.2% of Mo and the balance of Fe. The preparation process comprises the steps of vacuum melting, alloy ingot casting, forging cogging, finished product hot rolling and solution treatment. According to the invention, the tensile strength of the prepared high-strength magnetically soft alloy bar 1J22MV is larger than 500 MPa, the yield strength is greater than or equal to 250MPa, B800 is greater than or equal to 1.8 T, B2400 is greater than or equal to 2.1 T, B4000 is greater than or equal to 2.15 T, B8000 is greater than or equal to 2.2 T, the coercive force Hc is less than or equal to 144A / m, the Curie point is 980 DEG C, and the saturation magnetostriction coefficient (10<-6>) is 60-100.

The invention discloses an intelligent preparation method for low-tin silicon-molybdenum vermicular graphite cast iron. The intelligent preparation method comprises the steps that whether the weight of raw materials placed into a converter reaches a predetermined value or not is induced by an induction module; and the contents of all elements of molten iron are detected through an element detection module, and a programmable logic controller (PLC) controls a heating module, a decarbonization module, a stirring module, a prompt module, a roasting module and a valve control module to execute corresponding operation according to received data information through internal calculation and analysis. According to the intelligent preparation method for the low-tin silicon-molybdenum vermicular graphite cast iron, various parameters such as the temperature, the time and the amount of the materials placed in the converter can be strictly controlled in the preparation process, the error rate is decreased, and the preparation efficiency and the quality of the low-tin silicon-molybdenum vermicular graphite cast iron are improved; the workload of operators is greatly reduced, and high automation of the preparation process is achieved.

The invention discloses a newspaper news classification method based on text context structure and attribute information superposition network, belonging to the field of information processing. The present invention uses the text vector representation method to convert the text of indefinite length into a fixed-length vector to avoid the loss and redundancy of text information; from the perspective of training data, weighted random sampling is adopted to adjust the possibility of sample selection through weight , to optimize the composition of training samples; from the perspective of feature extraction, this paper not only considers the contextual result information but also text attribute information to optimize the feature extraction process. The present invention not only improves the extraction method of text features, but also additionally incorporates attribute features into the process of feature construction. Using the text vector representation method to convert the variable-length text into a fixed-length vector avoids the loss and redundancy of text information, and optimizes the extraction method of text features; additional feature information of news is added to enrich the source of features.

The present invention provides a device access authority control method, device and system, comprising: acquiring access device authority control basic data; binding a port to an access device and judging whether the binding is successful; if successful, according to the access port type and access permission request data, authorize the access device; continuously detect and maintain the current VLAN status of the port, continuously detect port collision statistics, whether the identity status of the access device is valid, and the online status of the access device; determine whether the access device should be revoked If the revocation conditions are met, the port is divided into a controlled VLAN according to the port type; the binding between the port and the access device is cancelled. By applying the present invention to control the whole process of access authorization of access equipment, prevention of illegal access, revocation of authorization, etc., it can ensure that legal access equipment can and can only obtain the access authority within the scope of permission, and prevent illegal access equipment from obtaining access to authorized equipment. The same access rights greatly improve the security of Ethernet terminal equipment.