40results about How to "Little fluctuation" patented technology

The invention relates to the field of pattern recognition, in particular to a pattern recognition method based on a self-adaptation correction neural network. The method comprises the steps of classifying input training samples through a probabilistic neural network model so as to obtain samples accurate in classification and samples inaccurate in classification; adding an input layer, a central layer and an excitation layer on the basis of the probabilistic neural network model structure so as to construct a self-adaptation correction neural network model structure; for the samples inaccurate in classification in the probabilistic neural network model, using themself as central points, calculating the allowance radius between the the samples and samples of other classifications, clustering error samples of same category so as to realize batch correction of classification patterns and replanning of a judging interface and build the self-adaptation correction neural network; finally, conducting pattern recognition on input testing samples based on the self-adaptation correction neural network model. The pattern recognition method has the advantages of being high in accuracy in mode classification, strong in mode generalization ability, good in classification real-time performance, wide in application prospect, and the like.

The invention discloses a method and a device for stabilizing a well wall in fine managed pressure drilling. The method comprises the following steps: analyzing the collapse pressure and the leakage pressure of an easily-collapsing and easily-leaking stratum based on double-porosity elastic hypothesis; designing a proper bottom hole pressure value by comparing the porosity pressure, the collapse pressure and the leakage pressure of the stratum; monitoring an annulus pressure value in real time by using PWD (Pressure While Drilling) in the drilling and pump stopping processes and the processes of pulling out of a hole and running in the hole by combining a drilling fluid density value for circulating pressure loss design so as to ensure that the bottom hole pressure is basically consistent with the designed bottom hole pressure. In the drilling and pump stopping process and the processes of pulling out of a hole and running in the hole, the annulus pressure value is monitored in real time by using the PWD so as to ensure that the bottom hole pressure is basically consistent with the designed bottom hole pressure and no great fluctuation is generated and ensure the stability of the well wall in the drilling operation process. The method and the device disclosed by the invention can be used for keeping the well wall stable in the drilling process of an oil-gas well.

The present invention discloses a harmonic compensation control method of a cascade H bridge photovoltaic grid-connected inverter, belonging to the photovoltaic generation field. The method mainly comprises the following steps: (1) performing independent control of capacitor voltages at direct current sides of all the H bridge units, and obtaining an active instruction value of a power grid current; (2) realizing astatic control of the power grid current, and generating total modulation voltage of an inverter and modulation degrees of all the H bridge units; and (3) calculating a modulation wave of each H bridge module according to a harmonic wave compensation strategy. Compared to literatures disclosed in the prior art, the harmonic compensation control method of the cascade H bridge photovoltaic grid-connected inverter can ensure normal operation of inverter unit power factors and small fluctuation of capacitor voltages at the direct current sides when the input power of the H bridgephotovoltaic grid-connected inverter is severely imbalance.

The invention discloses a diamond nanometer copper compounded lubricating oil additive in nanometer technical domain and mechanical fluid oil technical domain, which is characterized by the following: the nanometer diamond and nanometer copper are prepared to lube oil additive with diverse functional requirement; the high lubricating and high-intensity low restoring type fits for precision equipment, new device, high-grade car and gearbox and can diminish adding quantity of nanometer copper; the high lubricating and high-intensity high restoring type fits for wearing machinery and equipment and car and can enlarge the adding quantity of nanometer copper power. This invention possesses good dispersibility and does not need stirring and so on disposing craft.

The invention discloses a low-temperature hot melt adhesive which is prepared from the following raw materials in percentage by mass: 10-40% of styrene-isoprene-styrene block copolymer (SIS), 10-30% of a tackifier, 5-18% of nitrile-butadiene rubber, 10-40% of polyethylene wax, 0.6-0.1% of an antioxidant, 10-30% of naphthenic oil and 20-30% of resin, wherein the tackifier is rosin resin or petroleum resin; the nitrile-butadiene rubber is powder nitrile-butadiene rubber with acrylonitrile content of 32-35%; the naphthenic oil is KN4010 naphthenic oil; the antioxidant is one or more of an antioxidant B225, an antioxidant 1010, an antioxidant 168, and an antioxidant DLTP, and has outstanding processing stability and long-term protective effect on polyolefin; the polyethylene wax is of an AC8 level, and shows very strong external lubricating property due to an irregular structure and low-viscosity homopolymer. The hot melt adhesive disclosed by the invention has viscosity of less than or equal to 1.5Pa.s at 150 DEG C, and the viscosity fluctuates little under a temperature changing condition, is relatively stable, and is more excellent at -10 DEG C.

The invention discloses a control method for expanding an operating range of a cascaded H-bridge photovoltaic inverter and belongs to the field of photovoltaic power generation. The method mainly comprises steps that (1), DC side voltages of all H-bridge units are controlled, and an active current command is obtained; (2), fundamental waves of the grid current are controlled, third harmonic wavesof the grid current are controlled, and an inverse third harmonic wave voltage required for compensation is obtained; (3), the degree of modulation of the H-bridge units is calculated, the third harmonic waves are compensated for the modulated H-bridge units, and modulated waves of the modulated H-bridge units are obtained; and (4), according to the proposed control method, the inverse third harmonic voltage is distributed to the non-overmodulated H-bridge units, and modulated waves of the non-overmodulated H-bridge units are obtained. The method is advantaged in that compared with published literatures in the prior art, the method can guarantee that a unit power factor of the inverter normally operates, DC-side capacitor voltage fluctuation is small and the third harmonic wave content ofthe grid current is relatively low when the input power is seriously unbalanced in the cascaded H-bridge photovoltaic grid-connected inverter.

The disclosed acrylate-organosilicon -epoxy resin is prepared by butyl acrylate, hydroxyethyl beta-methacrylate, maleic acid, KH570 and KH550, ethyl silicate, and epoxy resin E44; wherein, is applies ethyl acetate as solvent, azo-bis-iso-butyronitrile as initiator, and selects free radical copolymerization and sol-gel method. This organic/inorganic hybridized material has well transparency and thermal stability and fit to site protection.

The invention relates to a vulcanized ethylene-octene copolymer waterproof coiled material and a production method thereof. The vulcanized ethylene-octene copolymer waterproof coiled material comprises a base layer, the base layer takes the ethylene-octene copolymer as a main raw material, and other auxiliary materials comprise fast extruding furnace black, calcium carbonate, ultrafine powdered steatile, polyethylene glycol and an antioxidant. By taking 100 parts of the ethylene-octene copolymer as a reference, the vulcanized ethylene-octene copolymer waterproof coiled material comprises the following components by weight part: 50-110 parts of fast extruding furnace black, 30-70 parts of ultrafine powdered steatile, 5-10 parts of calcium carbonate, 20-60 parts of plasticizer, 2-10 parts of polyethylene glycol, 1-6 parts of dicumyl peroxide, 0.5-2.75 parts of cross-linking agent and 1-3 parts of antioxidant. The ethylene-octene copolymer is crosslinked by dicumyl peroxide, complete crosslinking of the molecular chain of the ethylene-octene copolymer waterproof coiled material can be realized, thermal stability performance of the waterproof coiled material is increased, the relative molecular mass distribution of the ethylene-octene copolymer is narrow, high extrusion capacity is realized, production efficiency is greatly increased, and production cost is effectively reduced.

The invention discloses a multiple-effect fuel fuel-saving agent with nanometer water to assemble energetic material in liquid phase nanometer technical domain, which is characterized by the following: its oil-saving mechanism distinguishes with traditional additive; it chooses water (gasifying micro explosion function), energetic nitro group compound (energetic flame accelerating function) and polyatomic alcohol amine (dispersing modify function) as raw material; it produces fuel-saving agent through liquid phase nanometer technology.

The invention discloses an efficient multi-system test code coverage rate management method, which comprises the steps of analyzing and recording basic information of a to-be-tested software system, and extracting project parameters; calling a triggering device for providing service to the outside, and transmitting the project parameters to the triggering device for asynchronously acquiring test code coverage rate data; when test code coverage rate data is obtained, the method comprises the following steps of a triggering device judging whether transmitted project parameters exist in a non-executed project list or not by reading a configuration file; if not, querying whether currently executed data exists in a database or not, and if yes, pressing the data into a list to wait for triggering execution; downloading a code and checking a pom file; after the pom file is checked, starting a compiling program to generate a code coverage rate report file; and analyzing the code coverage ratereport file to form code coverage rate data. The method can be used for centralized storage and management of large-scale and distributed system test code coverage rate data.

The invention discloses a preparation method of a sample for determining the oxygen content in G13Cr4Mo4Ni4V steel, and relates to a preparation method of a sample for determining the oxygen content in steel. The invention aims to solve the problems of an inaccurate test result and a large measurement result fluctuation caused by incapability of ensuring consistency of surface crystallinity, flatness and brightness of an oxygen content measurement sample in steel in a traditional machining mode. The preparation method comprises the following steps: 1, linear cutting; 2, lathe machining; 3, polishing; and 4, cleaning, so that the sample for measuring the oxygen content in the G13Cr4Mo4Ni4V steel is obtained. The method has the advantages that the oxygen content measured value is accurate; and data stabilization and little fluctuation. The method is mainly used for preparing the sample for measuring the oxygen content in the G13Cr4Mo4Ni4V steel.

The invention discloses a regulating and controlling method and regulating and controlling system for polar components in oil used in a deep-frying process. The regulating and controlling method for polar components in oil used in a deep-frying process comprises the following steps of obtaining a deep-frying container constant oil quantity of a deep-frying container, production line unit time oil consumption of a deep-fried food production line, and a production line oil supplementing manner; and regulating at least one of the deep-frying container constant oil quantity, the production line unit time oil consumption and the production line oil supplementing manner, and regulating and controlling the polar components in the oil used in the deep-frying process. The regulating and controlling system for polar components in the oil used in the deep-frying process comprises an oil-frying container constant oil quantity regulating system, a production line unit time oil consumption regulating system, a production line oil supplementing manner regulating system and a master controlling system. Through the adoption of the regulating and controlling method and the regulating and controlling system disclosed by the invention, the polar components in the oil used in the deep-frying process can be regulated and controlled.

The invention provides a cadmium-arsenic compound pollution repairing agent based on a natural macromolecular organic matter. A preparation method of the repairing agent comprises the following steps:(1) pretreating straws to obtain a mixture A; (2) adding metal ions to the mixture A to make the water-soluble macromolecular organic matter and OH- precipitate, performing filtration to obtain a filter residue, and performing washing, filtration, drying and crushing to obtain a mixture B; and (3) compounding calcium carbonate, wollastonite, and the mixture B to obtain the cadmium-arsenic composite pollution repairing agent. The cadmium-arsenic composite pollution repairing agent can effectively reduce the activity of cadmium and affect the dissolution of arsenic; and the effect of adsorbingand depressing heavy metals is good, the soil organic matter can be increased, the soil structure is improved, and the plant growth is promoted.

The invention relates to a control method of an electric heater based on a user position temperature control. The control method comprises the following steps of, acquiring a first temperature value,a second temperature value, a third temperature value, a fourth temperature value and a human body position detection, automatically adjusting the working power of the electric heater according to theposition in the range, adjusting the working power of heating according to the change of the temperature value, adjusting the working power of the electric heater according to the change of the temperature value, judging the change in the relation among the first temperature value, the second temperature value and the third temperature value, adjusting the working power of the electric heater according to the change, judging whether the changes of the first temperature value and the second temperature value reach a preset range or not, automatically adjusting a surrounding temperature value of the heating for temperature control if the preset range is not reached, judging whether the temperature value of the range of the user reaches a preset value or not, and adjusting the working powerof the electric heater according to the temperature value of the position of the user, thus achieving the effect of automatic adjustment.

The invention relates to a production process for continuously producing glyphosate isopropylamine salt, and belongs to the technical field of pesticide synthesis. The production process comprises the following steps: step 1, preparing an isopropylamine aqueous solution; step 2, preparing a glyphosate ammonia water solution; and 3, mixing the isopropylamine aqueous solution and the glyphosate ammonia aqueous solution to obtain the glyphosate isopropylamine salt solution. The isopropylamine and the pure water isopropylamine aqueous solution are utilized, so that the risk that the isopropylamine is directly added into the glyphosate to easily cause explosion is avoided; by controlling the pH value of the isopropylamine aqueous solution at an outlet of a first mixing tank and the pH value of the glyphosate ammonia aqueous solution at an outlet of a second mixing tank, explosion caused by volatilization of a large amount of isopropylamine due to over-high instantaneity of the pH value of the mixed solution is avoided; and meanwhile, heat released by mixing reaction of the isopropylamine aqueous solution and the glyphosate ammonia aqueous solution is absorbed through condensation reflux, the volatilization of isopropylamine caused by overhigh reaction temperature is avoided, and the safety coefficient of continuous production is improved.

The invention provides a method for controlling polar components of edible vegetable oil in a frying process, which is characterized by comprising the following steps of: 1, adding a constant quantityof oil into a frying container; 2, obtaining the liquid level height h of the edible vegetable oil in the frying container through a liquid level sensor; 3, putting the food to be fried into the frying container through a hollowed-out containing container for frying; 4, after the frying is finished, taking up the containing container and hang up the containing container on the upper part of the frying container, and putting oil absorption paper into the containing container; 5, after hanging for a certain time, taking out the container. According to the invention, the content of polar components can be monitored in real time in the production and application process of edible vegetable oil, overproof products are prevented from flowing into the market, and effective guarantee is providedfor the rights and interests of consumers and the health of people.

The invention provides a detection method for 1-(2, 3-dichlorophenyl) piperazine hydrochloride and related substances thereof. According to liquid chromatography detection conditions of the method, octadecylsilane chemically bonded silica is used as a chromatographic column of a filler, an acetonitrile-disodium hydrogen phosphate buffer solution serves as the mobile phase A, acetonitrile-phosphoric acid serves as the mobile phase B, the detection wavelength is 254nm, and elution is performed in a gradient manner. The method is rapid, efficient, stable and accurately, and can be used to rapidlyand effectively related substances of 1-(2, 3-dichlorophenyl) piperazine hydrochloride.

The invention relates to a method for detecting the optimal placement position of cigarettes in a constant-temperature and constant-humidity box, and belongs to the technical field of cigarette balance. The method comprises: evenly placing three trays in a clamping groove in the constant-temperature and constant-humidity box from top to bottom at intervals; arranging two measuring points at the front left part and the rear right part of the upper layer; the middle layer being provided with a measuring point at the geometric center; arranging two measuring points at the front right part and therear left part of the lower layer; 2 hours after the constant temperature and humidity box reaching a preset temperature and humidity condition, performing measurement, and performing continuous measurement for 10-15 hours; wherein the direction of the maximum wind speed in each measurement point is taken as the final actual measurement direction of the position; calculating the airflow velocityuniformity and the airflow velocity fluctuation degree of each measurement point; and then selecting the optimal placement position when the cigarette is balanced according to the airflow velocity uniformity and the airflow velocity fluctuation degree of each measuring point. The method is simple and reliable, the optimal cigarette placement position can be found quickly and effectively, and the method is easy to apply and popularize.

The invention relates to a carbon fiber steam drafting system and a control method thereof and solves the technical problems. The carbon fiber steam drafting system is provided with a steam drafting machine, and is also provided with a control system, a medium-pressure steam filter, a steam pressure control regulating valve group, a primary mixer and a secondary mixer; and a dehydrator is arranged behind the primary mixer, and a psychrometeris arranged behind the secondary mixer. The invention also provides the control method. The invention can be used in the field of carbon fiber preparation.