39results about How to "Improve concentration accuracy" patented technology

A new OCT system and method are disclosed, where the system includes a probe equipped with a heating element and a high heat conductive member to warm a tissue site to be scanned to an elevated and/or to maintain the elevated tissue temperature with a temperature variation of less than or equal to 1° C. to improve an accuracy and reliability of an OCT glucose concentration value other long measurement durations. The new OCT system and method can also be equipped with pressure components to reduce a pressure exerted on the tissue site to a minimal constant pressure.

A chip with measuring reliability and a method thereof are provided. The present invention serially connects a resistor having a resistance equal to or a little more than a maximum resistance of the chip itself to the resistor R_s of the chip so as to compensate the resistance differences among chips. A noise to signal (N/S) ratio of the chip is decreased, and a measuring reliability of the chip is improved.

The invention discloses a ship urea solution preparation device which comprises a material feeding system, a dissolution stirring device, a water supplying device, a urea solution storage tank and a control system, wherein the material feeding system is used for supplying and transferring urea powder; the urea powder is fed into the dissolution stirring device from the material feed opening of the dissolution stirring device; a concentration sensor is arranged in the dissolution stirring device; a water pump is arranged between the water supplying device and the dissolution stirring device; a urea solution injection-in pump is arranged between the urea solution storage tank and the dissolution stirring device; the control system comprises a judging device; the judging device is connected with the concentration sensor and can be used for judging whether water needs to be injected in further or not according to signals of the concentration sensor; the control system is used for controlling the water pump to inject pure water with the set amount in batches into the dissolution stirring device according to signals of the judging device. The invention also provides a ship urea solution preparation method. According to the ship urea solution preparation device and method, a urea solution is prepared in a manner of injecting the water in batches, and the influences of moisture absorption of the urea powder and scattering and leaking of the urea powder on the preparation of the urea solution can be effectively solved, so that the preparation precision of the urea solution is improved.

The invention provides an atmospheric pollution monitoring method and device; the method includes the steps: acquiring current atmospheric state parameters in a set region; according to a pre-set corresponding relation of the relative humidity of the atmosphere and hygroscopic growth parameters of pollutants contained in the atmosphere, determining the hygroscopic growth parameters, corresponding to the relative humidity of current atmosphere, of pollutants contained in the current atmosphere; according to the hygroscopic growth parameters of the pollutants contained in the current atmosphere and the contents of the pollutants contained in the current atmosphere, determining the concentrations of the pollutants of the current atmosphere. By the way, the current atmospheric pollution degree in a target region is obtained through the hygroscopic growth parameters, corresponding to the relative humidity of the current atmosphere, of the pollutants contained in the current atmosphere and the contents of the pollutants contained in the current atmosphere, the diversity of the composition of the pollutants contained in the atmosphere takes into account, the accuracy of the measured concentrations of the pollutants of the current atmosphere can be guaranteed to be relatively high, and the damage to people caused by the atmospheric pollutants can be effectively reduced.

The invention provides a variable-rate spraying plant protection unmanned aerial vehicle equipped with variable-concentration pesticide preparation and pesticide application modules. The variable-ratespraying plant protection unmanned aerial vehicle comprises an unmanned aerial vehicle module, a vehicle-mounted power supply module, a vehicle-mounted control module, the vehicle-mounted pesticide preparation module and the vehicle-mounted pesticide application module. Compared with the prior art, the variable-rate spraying plant protection unmanned aerial vehicle has the following advantages: (1) effectively coping with big differences in disease index in different areas of an operation land block, following the principle of ''mild pesticides for mild disease and severe pesticides for severe disease'' to achieve ''variable-concentration'' pesticide application, and making up for the technical deficiencies of a ''variable-rate'' pesticide application unmanned aerial vehicle; (2) achieving the ''real-time and on-demand'' preparation of pesticide solutions with different concentrations during the flight operation of the plant protection unmanned aerial vehicle by adopting the two-tankindependent control output design with a water tank and a pure pesticide tank, and achieving the recovery and recycling of the remaining water and pesticides after the operation; (3) adopting a noveldesign of using a single-chip microcomputer to control two different mediums to perform the preparation of the pesticide solutions with different concentrations, achieving the advantages of good system responsiveness, high concentration accuracy and the like, and facilitating the popularization and application.

The invention discloses a small high-precision gas proportioner. The gas mixing ratio is directly controlled by a gas proportional valve, the pressure of multiple paths of gas for proportioning can becomplementary by means of a pressure complementary type pressure stabilizer, and the gas enters the gas proportional valve with the pressure kept consistent. By means of the scheme, a flow testing mode is abandoned, the gas mixing ratio is directly controlled, the concentration precision of mixed gas is improved, and the defects of the prior art are effectively overcome; in addition, an integration module structure is adopted in the scheme, all the components form a system through integration modules, no pipelines are designed, and the problem that the layout and leakage maintenance of pipelines are not convenient is solved effectively.

The invention discloses a mercury filtering eliminator and a mercury analysis meter and method. The mercury filtering eliminator comprises a gas guide tube, metal balls, blocking pieces and positioning tubes, wherein the metal balls are a solid balls formed by metal wires through winding and mixing; the metal wires are metal which can form amalgam with mercury to adsorb mercury; the metal balls are stacked and filled in the gas guide tube; two ends of a stacking area of the metal balls are blocked by adoption of the blocking pieces to prevent the metal ball from falling off, so as to form a mercury filtering layer; the blocking pieces are made of a material which does not adsorb interference substances in gas flows; and the positioning tubes are arranged in two ports of the gas guide tubeso as to prevent the filtering layer from loosening and movement. According to the mercury filtering eliminator, the solid metal balls which can generate amalgam with mercury and is formed by the metal wires through winding and mixing are adopted, the metal balls are rough in surface and large in specific area, and the interspaces between the metal balls can ensure sufficient contact between the mercury and the metal balls and ensure that gas flows can smoothly pass through the filter layer, so that the metal balls are particularly suitable for the adsorption and enrichment of high-concentration mercury in gas.

When sequencing is used for the analysis of composition of nucleic acid mixtures with a large dynamic range of concentrations of individual components, the reliability of results significantly differs for abundant and rare components. The present invention relates to methods for analysis of concentrations of components of nucleic acid mixtures by sequencing, wherein relative abundances of at least two components for which concentrations should be measured is changed before sequencing in a reproducible way using locus-specific oligonucleotides.

A concentration control apparatus capable of appropriately making a zero adjustment of a concentration measurement mechanism without interrupting a semiconductor manufacturing process includes: a control valve that controls gas flowing through a lead-out flow path; a concentration measurement mechanism that measures the concentration of source gas contained in gas flowing through the lead-out flow path; a concentration controller that controls the control valve so that the deviation between measured concentration measured by the concentration measurement mechanism and preset set concentration decreases; a judgement time point determination part that determines a judgement time point that is the time point when the gas present in a measurement part where the concentration measurement mechanism performs the concentration measurement has been replaced with other gas; and a zero adjustment part that makes a zero adjustment of the concentration measurement mechanism at or after the judgement time point.

The invention discloses a method for calculating atmospheric biological particle concentration. The method comprises the following steps: (1) installing a biological particle sampling device; (2) sampling biological particles in the air within a period of time delta t; (3) carrying out statistics on the number of the biological particles on a collected slide in the sampling device; (4) calculatingthe atmospheric biological particle concentration. The biological particle sampling device installed in the step (1) comprises a rotary drive seat (1); a driving motor (2) is arranged on the rotary drive seat (1), a linkage shaft (3) is arranged on the driving motor (2), and a biological particle collecting part (4) is arranged at the upper end of the linkage shaft (3). The new method for calculating the atmospheric biological particle concentration, provided by the invention, realizes the accurate calculation of the atmospheric biological particle concentration by means of the specific improvement on the conventional collecting device and counting area, thus improving the accuracy and reliability of the conventional atmospheric biological particle calculation.

The invention relates to the field of animal husbandry, in particular to an efficient disinfectant preparation device for animal husbandry, which comprises a shell, a mixing box is arranged on the inner side of the shell, a supporting mechanism is arranged between the mixing box and the shell, a discharging mechanism is arranged on the upper side of the mixing box, and a water injection mechanismis arranged on the left side of the discharging mechanism. The motor can drive the outer rod to rotate through the inner rod, the outer rod drives the stirring rod to rotate so that deionized water and a medicament can be fully mixed, the inner rod can drive the outer rod to rotate at the same time, the outer rod drives the cam to rotate so as to push the movable plate to rotate, and the mixing box moves up and down repeatedly under the action of the movable plate and the first spring. By arranging the water injection mechanism, the volume of the deionized water can be accurately controlled, and by arranging the discharging mechanism, the discharging amount of the medicament can be accurately controlled, so that the concentration accuracy of the finally prepared disinfectant is high.

The invention provides an on-board variable-concentration dispensing device for a plant protection drone for variable-concentration application, comprising a power module, a control module, a dispensing module and an application module.Compared with the prior art: (1) the proposed variable-concentration dispensing device is capable of effectively responding to large incidence index differences indifferent areas of an operation site, capable of following the principle of ''using a pesticide with a corresponding small concentration for a mild case and a pesticide with a corresponding gret concentration for a severe case'', and capable of achieving'' variable concentration'' application, and the device is dedicated to the mounting of a plant protection drone; (2) ''water tank + pure pesticide tank'' dual-tank independent output control is adopted to realize ''real-time and on-demand.'' blending of different concentrations of pesticide solutions during flight operation of the plant protection drone; (3) a single-chip microcomputer is adopted to control two different media for blending different concentrations of pesticide solutions, which has the advantages of good system responsiveness, high concentration accuracy and the like; (4) ) the variable-concentration dispensing device is more suitable for a mainstream uniform flight operation mode of the existing plant protection drones, and is convenient to popularize and apply.

The invention provides a manned plant protection aircraft realizing variable pesticide application concentration in a working process. The manned plant protection aircraft comprises a manned aircraftmodule, an airborne power supply module, an airborne control module, an airborne pesticide dispensing module and an airborne pesticide application module. Compared with the prior art, the manned plantprotection aircraft has advantages as follows: (1), the manned plant protection aircraft capable of effectively dealing with larger disease index difference of different areas of a working land parcel, conforming to the principle of lower pesticide application for mild diseases and heavier pesticide application for severe diseases and realizing variable-concentration pesticide application in theoperation process is provided, and defects of the manned plant protection aircraft realizing variable-flow pesticide application are overcome; (2), with adoption of water tank and pure pesticide tankdouble-tank independent control output design, real-time and on-demand blending of pesticide liquids of different concentrations in the flight operation process of the manned plant protection aircraftis realized; (3), the novel design of adopting a single chip microcomputer to control two different media for blending the pesticide liquids with different concentrations has the advantages of good system responsiveness, high concentration accuracy and the like and is convenient to popularize and apply.

The invention relates to a method for detecting flumequine enantiomer in human plasma. The method comprises the following steps: preparing a standard flumequine solution, adding the flumequine solution into the human plasma, and then detecting by using UFLC-MS/MS. According to the method, a solid phase extraction condition is optimized, so that the solid phase extraction time is shortened, and the efficiency is higher; the precision of the UFLC-MS/MS for analyzing the concentration of the flumequine enantiomer is high, the speed is high, the operation is simple, and the cost is relatively low; the detection method is good in linear relation to a target compound, the yield is high, the relative deviation is small, and a used reagent is low in toxicity, less in use amount and environmentally friendly.

The invention relates to a method for detecting the enantiomer of ofloxacin in seawater, which comprises the following steps: vacuum filter the seawater, then adjust the pH to 2-4, and vacuum filter again to obtain pretreated seawater; Phase extraction column, seawater passes through the column, after the extraction is completed, rinse with deionized water, vacuum dry, and elute in 2-5 times, and the eluent is dried in a nitrogen blowing instrument in a water bath at 30-35°C , the residue was redissolved with ethanol, micropore nanofiltration, and the filtrate was used for later use; the concentration of the enantiomer of ofloxacin was detected by high performance liquid chromatography. The present invention optimizes the solid-phase extraction conditions, so that the time of solid-phase extraction is shortened and the efficiency becomes high, while the high-performance liquid chromatography method for analyzing the concentration of ofloxacin enantiomers has high precision, fast speed, simple operation and low cost. Low; the detection method has a good linear relationship to the target compound, high recovery rate, small relative deviation, low toxicity of the reagents used, less usage, and is environmentally friendly.

The invention relates to the field of detection, and particularly discloses a liquid chromatography joint detection method for vitamins A, D3 and E. The method comprises the following steps: (1) respectively preparing a vitamin A standard stock solution, a vitamin D3 standard stock solution and a vitamin E standard stock solution; (2) respectively sucking a proper amount of the vitamin A standardstock solution, the vitamin D3 standard stock solution and the vitamin E standard stock solution into a brown volumetric flask, and fixing the volume with methanol to obtain a standard working solution; (3) adding a to-be-tested sample into the brown volumetric flask, adding methanol, heating, carrying out ultrasonic extraction, cooling, and fixing the volume to obtain a to-be-tested sample solution; and (4) respectively carrying out liquid chromatography variable wavelength detection on the standard working solution and the to-be-tested sample solution. According to the joint detection method, the vitamins A, D3 and E in the to-be-detected sample can be extracted at the same time, the contents of the vitamins A, D3 and E are detected at the same time by controlling a mobile phase and a variable wavelength detection mode, the detection efficiency is improved, and the accuracy is high.

The invention belongs to the technical field of mine dust prevention, and particularly relates to a self-liquid-preparation concentration-adjustable anti-freezing dust-suppression spraying system of a large rock dumping machine. The invention discloses a self-prepared solution concentration-adjustable anti-freezing dust-suppression spraying system of a large rock dumping machine. The self-prepared solution concentration-adjustable anti-freezing dust-suppression spraying system comprises a quantitative CaCl2 preparation system, a multi-stage solution preparation system group, a spraying system and a control system, the quantitative CaCl2 batching system is mounted at the top of each single-stage solution preparation system of the multi-stage solution preparation system group and is connected with the single-stage solution preparation system through a feeding hole 211; the last discharge port 212 of the multi-stage solution preparation system group is connected with a liquid storage tank of the spraying system; a spraying system water pump of the spraying system is connected with a master controller of the control system, and a signal receiving end and a signal output end of the control system are connected with a sensor group and a plurality of controllers through wireless signals. The system has the advantages of being automatic in the whole process, high in efficiency, high in precision, capable of adjusting the solution concentration in time and capable of adapting to normal operation in various severe working environments.

Provided is a cleaner including a dust separation unit separating dust in the air, a suction flow path supplying outside air to the dust separation unit, a fan module moving the air in the suction flow path, and a dust sensor measuring concentration of dust in the suction flow path. The suction flow path includes a first suction flow path extending in a first direction and a second suction flow path connecting the first suction flow path to the dust separation unit and extending in a second direction that forms an obtuse angle with the first direction, and the dust sensor is disposed in the second suction flow path.

The invention relates to the technical field of fuel gas remote monitoring, and particularly relates to a remote automatic control system. The remote automatic control system comprises a detection module, a judgment module, an alarm module, a cloud camera and a remote module, wherein the detection module is used for detecting the concentration of natural gas in the air through an ultrasonic technology; the judgment module is used for judging whether the detected concentration of the natural gas in the air is greater than a lower limit of the explosion concentration or not; the alarm module isused for giving an alarm when the concentration of the natural gas in the air is greater than the lower limit of the explosion concentration and sending alarm information to the remote module; the cloud camera is used for starting to shoot a video when the concentration of the natural gas in the air is greater than the lower limit of the explosion concentration and sending the shot video to the remote module; and the remote module is used for monitoring a gas station in real time. According to the invention, the concentration, which is calculated through the supersonic speed technology, of thenatural gas in the air is high in precision and small in error, and accurate alarm data can be provided.

The invention discloses a concentration regulation anesthesia outfit for anesthesiology department. The concentration regulation anesthesia outfit comprises a tank body and legs arranged at the bottomof the tank body; electric sliding tables are arranged at an upper side and a lower side of each of two sides of the tank body, a first motor is mounted on a guide block of each electric sliding table, and a bearing penetrates through an output shaft of each first motor, and the output shaft is connected with a cylinder; a clamp slot penetrates a cylinder output end; a stirring mechanism is horizontally mounted at the bottom of the tank body; a water pump is arranged at one side, far away from the stirring mechanism, of the tank body, a water outlet pipe of the water pump communicates and penetrates one side of the top of the tank body; three groups of branches are arranged on the water outlet pipe, and three groups of branches penetrate a convex support plate and are connected with nozzles; and a liquid inlet communicated with an external water pipe is formed at the top of the stirring mechanism on one side of the tank body. The concentration regulation anesthesia outfit disclosed bythe invention is free from manual operation, thereby preventing from contacting medicine raw materials to cause the pollution; the medicine blending quality and efficiency are improved, the concentration precision of the ratio regulation is improved, and the medicine waste is avoided.