50 results about "Emission flux" patented technology

A system for obtaining emission flux of a gas plume, emanating from a source, includes an airborne differential absorption lidar (DIAL) system for determining multiple concentration path length (CPL) values along a flight path; and an airborne wind measuring system (WMS) for determining a wind vector at the aircraft altitude. Also included is a processor for receiving the multiple CPL values determined by the DIAL system and the wind vector determined by the WMS. The processor uses the CPL values to compute either (a) an area-integrated concentration (AIC) value or (b) an average concentration value over a cross-plume extent, defined along the length dimension of the flight path. The processor also scales the wind vector to the near ground altitude level of the gas plume to obtain a scaled wind vector. The emission flux is obtained by multiplying either the AIC value or the average concentration value with a component of the scaled wind vector. The component of the scaled wind vector is defined by a vector perpendicular to the length dimension of the flight path.

The invention relates to a bamboo forest carbon sequestration capacity measuring and carbon sequestration capacity improving fertilizer preparation method, which comprises the following six steps: 1, test design: selecting a bamboo forest sample plot, setting and processing a test area, then sampling, determining and computing; measurement and computation of annual respiration carbon emission amount of bamboo forest: measuring soil respiration rate, computing greenhouse gas CO2 emission flux and CO2 emission amount in soil annular accumulated respiration and determining no-root respiration soil CO2 emission amount; 3, measurement and estimation of bamboo forest vegetation carbon storage; 4, measurement and computation of soil carbon storage; 5, computation of bamboo forest annual net carbon fixation amount; and 6, optimum fertilizer preparation for improving bamboo forest carbon sequestration capacity. Through fertilizer application according to the optimum fertilizer preparation scheme obtained in the method disclosed by the invention, the carbon sequestration capacity of the bamboo forest can be obviously improved, and the invention provides an effective and feasible novel scheme for solving the greenhouse effect caused by the increase of atmospheric CO2 concentration.

The invention discloses an infrared multi-constituent monitoring method and a monitoring system for monitoring emission flux of gas in pollution sources, which is characterized in that the monitoring system comprises a movable platform which is provided with a solar tracker, an infrared spectrometer, a computer and a GPS localizer; The monitoring method comprises the following steps: taking the sun as a light source, which penetrates the polluted gas and is absorbed selectively by the gas molecule; guilding the sunlight into the infrared spectrometer by the solar tracker and measuring the solar spectrum; analyzing and calculating the column concentration of the pollutant molecule by a software; moving the movable platform and measuring the column concentrates of different positions; measuring the distances of different points by the GPS localizer; furthermore, and obtaining the emission flux of the pollution gas in the whole measurement area by the calculation of the software by combining the wind speed information of all measuring points,. In the invention, the emission flux of the gas in the pollution source can be monitored quickly and exactly, the whole set of system is simple for operation, the cost is relatively cheap, the monitoring process is completely controlled automatically by the software, with convenient use.

The invention relates to an automatic gas sample collection station for monitoring greenhouse gas emission flux. The collection station comprises a power system, a master control system, an automatic static box, a water seal system, an automatic static box lifting system, a gas collection system, a gas injection system, a positioning system and a sample disc collection system. The main operating processes of the station comprises the following steps: supplying power through the power supply, sequentially controlling the covering of the box, the adding of water and sealing, collecting of gas, positioning of a sample bottle and injecting of gas through the master control system and recording environmental conditions during gas collection. After the gas sample is completely collected for the first time, the automatic static box is controlled to open, and sampling starts again when the next sampling time reaches. The master control system can transmit instructions through field key operation and also can be remotely or wirelessly controlled to operate or transmit a status report. The automatic gas sample collection station is mainly used for fully automatically sampling and monitoring greenhouse gases emitted from agriculture, forestry, grassland and natural ecosystem environments and also can be used for automatically sampling gases during atmospheric environmental monitoring.

The invention relates to a method and a device for determining diffusion and reduction processes of nitrous oxide in soil. The method comprises the following steps: A. loading soil column samples; B. pre-culturing; C. determining a sample, namely introducing N2O or N2 gas which is used in a control test into two filled soil column samples by an inflating system after a pre-culturing test, and completing the gas collection after the N2O emission flux is constant; carrying out air exploitation; monitoring the N2O emission flux of the soil surface layer, and quantifying the N2O diffusion and reduction quantity; and D. determining the N2O residual quantity. The method and the device for determining the diffusion and reduction processes of the nitrous oxide in the soil has the great significance to the deep study on the diffusion process and the reduction mechanism of the accumulation of the N2O in the soil at the lower layer and the quantification of the disposition of the N2O in a soil body as well as the quantitative relationship between the N2O and the environmental factor, can provide a basis for agriculture management measures in formulating and intensifying the N2O reduction intensity and reducing the N2O emission, and provide scientific parameters for the contribution of accurately estimating N2O emission in a farmland by the soil at the lower layer.

The invention provides a method for eliminating a control rod tine effect in reactor core calculation. Specific steps are: step 1: dividing a whole solving region into several node regions, and writing a to-be-solved neutron diffusion equation; step 2: by using a variable principal, writing each node functional style; step 3: expanding neutron flux density and a neutron source space basis function and substituting the neutron flux density and the neutron source space basis function into the node functional style; and step 4: by using the node functional style, obtaining a relation between an emission neutron flux and an incident neutron flux of a node surface and a relation between a node inner flux and an emission flux and an incident flux of the node surface. The method provided by the present invention is based on a variational node method; a cross section of a node functional is written into a space function; a hypothesis that a macro cross section in the node is a constant is not made during a deduction process; and finally non-uniformity in the node is displayed in a response matrix of the node, so as to realize computation of a non-uniform node and further eliminate the control rod tine effect.

The invention discloses a greenhouse gas emission flux observation sampling device, which comprises a top box, a base and a gas sampling collecting device. An exhaust nozzle, an air inlet nozzle, a fan, a digital display thermometer, a handle, and a hose are arranged on the top box. The gas sampling and collecting device includes an injection device and a gas sample bag; the exhaust nozzle and theair inlet nozzle are symmetrically distributed on the top cover of the top box; the host is connected with the exhaust nozzle and the other end is suspended into the inner cavity of the box; and holes are formed in the host in the box uniformly. The injection device, the exhaust nozzle and the gas sample bag are connected by a three-way valve. A calculation method for the greenhouse gas dischargeflux of the thicket sedge marsh is provided. The device has the advantages: firstly, calculation of greenhouse gas emission flux becomes accurate by the cylindrical box; secondly, the exhaust nozzleand the air inlet nozzle employ the silicone nut, so that the sealing performance of the box is ensured; repeated use is realized; and material consumption is reduced; and thirdly, with the calculation method, the calculation accuracy of greenhouse gas flux is improved.

To enable simple and accurate measurement for the flow rate (emission flux) of a chemical substance released from a site to be measured such as a floor surface, ceiling, wall surface, or furniture with no effect of external air (air in the room). [Means for Solution]

An opening 14 for taking in a chemical substance released from an inspection object (13) into the casing (12) is formed to the bottom surface (12a) of a hollow casing (12) to be bonded to the inspection object (13), a test specimen (15) that takes place color change reaction with the chemical substance under a humid circumstance is disposed to the inner surface of the casing (12) being opposed to the opening (14), and a transparent observing section (12a) is formed to the casing (12) for observing the color change of the test specimen (15) from the outside while bonding the inspection object (13) as it is.

The present invention relates to the exploration for and exploitation of formation hydrocarbons. According to the invention, a sample of material, representative of the impregnation with hydrocarbons of the rocks passed through, is taken during a drilling operation, with which sample a value of an emission flux, representative of the concentration of the fluorescent elements in the sample, and a value of a fluorescence quotient, which reflects the nature of the hydrocarbons present in the sample, are determined by spectrofluorimetry. The invention finds its application in analytical laboratories and on the drilling sites of petroleum production fields.

The invention discloses a point pollution source emission flux measurement method based on a large-visual-field imaging spectrometer. The point pollution source emission flux measurement method comprises the steps of analyzing and calculating the inclined column concentration of a polluted gas by a differential absorption spectroscopy algorithm, converting the inclined column concentration into vertical column density (VCD) through a radiation transfer model, and determining a smoke plume width W(smoke) according to the distribution of distances of the column concentration of the polluted gas, wherein the section concentration V of a smoke plume is equal to VCD*W; measuring the vertical column concentration of the polluted gas at the moment T1, and recording a position S1 of a characteristic value; then, measuring the perpendicular column concentration of the polluted gas at the moment T2, and searching a position S2 of the characteristic value which is recorded at the moment T1; and calculating the discharging speed V(smoke) of the smoke plume according to the records. The point pollution source emission flux measurement method is used for measuring the section concentration of the smoke plume and the discharging speed of the smoke plume, and a point pollution source emission flux can be obtained by multiplying the two measured results. The structure is simple, errors are small, and the measurement precision and the efficiency are high.

The present invention discloses a method for acquiring an atmospheric pollutant emission flux based on mobile AHSA observation. Differential inclined column concentration results of atmospheric pollutants (nitrogen dioxide, sulfur dioxide, formaldehyde and the like) distributed in the space are acquired by using mobile AHSA. A meteorological chemical model is used to simulate the acquired atmospheric information, and the acquired atmospheric information is inputted into atmospheric radiation transmission to calculate atmospheric photon path information. The differential inclined column concentration results are further converted into the tropospheric vertical column concentration results. An emission flux result of a pollution source is calculated and acquired in combination with wind field information simulated by the meteorological chemical model. The method uses a remote sensing method to indirectly, quickly and accurately quantify the emission flux result of the atmospheric pollutants, and provides a powerful monitoring means for atmospheric environmental pollution. Meanwhile, the emission flux calculating result of the atmospheric pollutants provides necessary data support foratmospheric environmental management.

Disclosed is a light-emitting device (100) has a light-emitting layer portion (24) which is composed of a group III-V compound semiconductor and a transparent thick-film semiconductor layer (90) with a thickness of not less than 40 μm which is formed on at least one major surface side of the light-emitting layer portion (24) and composed of a group III-V compound semiconductor having a band gap energy larger than the photon energy equivalent of the peak wavelength of emission flux from the light-emitting layer portion (24). The transparent thick-film semiconductor layer (90) has a lateral surface portion (90S) which is a chemically etched surface. The dopant concentration of the transparent thick-film semiconductor layer (90) is not less than 5×10¹⁶/cm³ and not more than 2×10¹⁸/cm³. The light-emitting device can have a transparent thick-film semiconductor layer while being significantly improved in light taking-out efficiency from the lateral surface portion.

The invention discloses a method for determining the carbon monoxide emission flux of an environmental atmospheric pollution point source based on satellite remote sensing. On the basis of spatial and temporal distribution of carbon monoxide atmosphere observed by satellite remote sensing, smoke plumes emitted by a point source are identified and quantified by adopting a section integrated flux algorithm according to wind field information. According to the method, the carbon monoxide emission flux of an industrial source and the uncertainty and the long-time change rule of the carbon monoxide emission flux are calculated by using a section integrated flux algorithm. The transmission scale, the spatial distribution rule and the space-time evolution characteristics of the carbon monoxide emission of an industrial source can be obtained by combining atmospheric circulation, meteorological elements, topography and landform and source area pollution characteristics. Compared with a traditional emission flux quantification method, the section integrated flux algorithm based on satellite remote sensing can realize high-precision calculation of the emission flux of a point source in any region, and has important significance in the field of accurate prevention and control of atmospheric pollution.

The invention discloses an atmospheric pollutant emission flux treatment method, a storage medium and a computer terminal. The method comprises the steps that an observed value of the atmospheric pollutant concentration and the initial emission flux of the atmospheric pollutant concentration are obtained, and the observed value is used for representing a numerical value obtained by measuring the collected atmospheric pollutant concentration by a target station; the observed value and the initial emission flux are processed through an atmospheric transmission model, the target derivative of the atmospheric pollutant concentration is obtained, the atmospheric transmission model is constructed through a deep learning framework, and the atmospheric transmission model is used for representing the dynamic transmission process of the atmospheric pollutant concentration in the atmosphere. The target derivative is used for representing the derivative of the observed value relative to the emission flux; and updating the initial emission flux based on the target derivative to obtain the target emission flux of the atmospheric pollutant concentration. According to the invention, the technical problem of low monitoring accuracy of atmospheric pollutant concentration in the prior art is solved.

The invention discloses vehicle-mounted dual optical path differential absorption spectrum-based source list obtaining method and device. The method comprises the steps of obtaining vertical column concentration of a conventional pollution gas on an observation path through a vehicle-mounted dual optical path differential absorption spectrum device, carrying out latticed reconstruction on pollution gas distribution in a vehicle-mounted observation path by using an inner interpolation method, and coupling wind speed data and wind direction data (v) to determine the variation deltaVCD//V of the vertical column concentration of the pollution gases in lattice points along a wind field direction; and calculating the external emission Flux of each lattice point within a time period by combining with an intercept L perpendicular to V of the lattice point along the vertical wind direction, wherein the emission list in the area is a set of the emissions of the pollution gases in the lattice points in the observation area. Fast obtaining of the source list in the observation area is achieved through determining the variation of the vertical column concentration of the pollution gases in the lattice points along the wind field direction and then obtaining the emissions of the lattice points by combining with the intercepts of the lattice pints along the vertical wind direction.

The invention relates to the salt marsh greenhouse gas emission research technology field and especially relates to an evaluation device and an evaluation method for a tidal influence on volatile halogenated hydrocarbon release in a salt marsh. The device comprises a cylinder, a seawater control device, a gas collection and detection device, an air exhausting device, a remote control end and a control system, wherein the cylinder is placed in a wetland soil column where vegetation is grown; the seawater control device is connected to the cylinder and is used for injecting seawater into the cylinder; the gas collection and detection device is connected to the cylinder and is used for collecting and detecting a gas generated in the cylinder; the air exhausting device is used for controllingcirculation and isolation of the gas in the cylinder and the outside world; the remote control end is used for carrying out remote control; and the control system is wirelessly or wiredly connected tothe remote control end. The control system comprises a controller. By using the device and the evaluation method of the invention, through simulating a tidal effect of seawater on salt marsh ecosystem waterflooding time and a waterflooding depth, a generated greenhouse gas emission flux can be conveniently, automatically and quickly detected. And then, a relationship between the tidal effect andsalt marsh greenhouse gas emission in an actual environment is acquired.

The invention discloses a method and a device for estimating nitrous oxide greenhouse gas emission of soil in a farmland. The method comprises the following steps: S1, running an SWAT(Soil and Water Assessment Tool) semi-distributed hydrologic model, and performing simulation to acquire soil environment parameters of different space positions; S2, building physical and chemical properties of the soil and corresponding N2O emission amount database through documents and collection of measured data, and building a nonlinear model of the N2O emission amount of the soil and the soil environment parameters; S3, coupling the parameters in the step S1 with the nonlinear model in the step S2 by using Python language, and dynamically calculating the N2O emission flux of the soil in the whole basin;S4, realizing automatic presentation of N2O emission spatial-temporal change by using the Python language; and S5, realizing automatic comparison and analysis on the N2O emission of the soil under different scenes by using the Python language. According to the method disclosed by the invention, the precision calculation is ensured, and emission of the N2O of the soil in the whole basin can be quickly and effectively estimated.

The invention discloses a method for remediation of mercury contaminated soil by reducing volatile mercury emission flux. The method includes the steps of: 1. consolidating contaminated farmland for subdivision into a plurality of identical small field blocks, and separating the small field blocks from each other by a film; and 2. putting a passivator and its composition for soil remediation intoall the small field blocks, mixing the substances evenly, and stabilizing the state for 10d or more. The method provided by the invention utilizes the chemical bond effect of the passivator and mercury, absorption effect and the like to immobilize mercury in contaminated soil, and can significantly reduce the emission flux of volatile mercury in contaminated farmland and reduce the hazard of atmospheric mercury pollution.

The invention discloses a method for measuring emission flux of unorganized surface source gas, and belongs to the technical field of measurement and testing. According to the method, the temperature and the pressure in a box body of the sampler are collected through the box body type sampler, the concentration of a gas sample collected at each sampling time is detected, and an emission flux calculation formula considering temperature and pressure changes in the box body of the sampler is deduced according to an ideal gas state equation; fitting and calculating a regression equation according to a value of a combined variable consisting of the temperature and the pressure in the box body recorded at each sampling time and the concentration of the gas sample collected at each sampling time and a time value; and substituting the slope of the regression equation into an emission flux calculation formula to obtain a monitoring result of the emission flux of the unorganized non-point source emission gas, so that the measurement precision of the emission flux of the unorganized non-point source gas is effectively improved.

The invention discloses a pesticide industry site volatile odor substance sampling and evaluation device and an evaluation method. The pesticide industry site volatile odor substance sampling and evaluation device comprises a box body, a sampling hole, a sealing plug, a fan and a power supply device. The bottom portion of the box body is opened and the upper surface of the box body is sealed. Thesampling hole is in the upper surface of the box body to make the inner portion of the box body communicated with the outside world. The sealing plug is located in the sampling hole and is used for sealing the sampling hole. The fan is located in the box body. The power supply device is electrically connected with the fan. The device eliminates the interference of weather conditions of wind powerand wind direction and the like, ensures uniformity of gas emission conditions of volatile odor substances, obtains emission flux of the odor substances and can calculate discharge amount of the odorsubstances in soil per square meter per unit time and can be used for quantitatively evaluating the project effect of odor covering and sealing measures; and by synchronously obtaining the temperatureand humidity data in the box body, the device can analyze the influencing factors of the unpleasant odor conveniently.

The invention relates to the technical field of research on the emission of volatile halogenated hydrocarbons in salt marshes, in particular to an evaluation device and an evaluation method for studying the emission factors of volatile halogenated hydrocarbon in salt marshes. The evaluation device includes a column body used for placing a salt marsh soil column with vegetation, a temperature control device used for controlling the temperature in the column body, a wind speed control device used for controlling the wind speed in the column body, a light control device used for controlling the light in the column body, an exhaust device arranged at the upper end of the column body and used for making the gas in the column body isolated from the outside, and a gas collection and detection device connected with the column body and used for collecting and detecting the gas generated in the column body. The evaluation device includes a control system which includes a controller. By controlling the temperature, light and wind speed of a salt marsh ecosystem, the evaluation device and the evaluation method of the invention can automatically and rapidly detect the emission flux of volatilehalogenated hydrocarbon generated and obtain the relationship between the temperature, light and wind speed and the emission of volatile halogenated hydrocarbon in the salt marsh, which is of great significance for the research of emission of volatile halogenated hydrocarbon.

The invention discloses a pollution source emission flux measurement method based on airborne and vehicle-mounted DOAS synchronous observation. The method comprises the following steps of 1, performing synchronous voyage observation of airborne and vehicle-mounted DOAS systems; 2, obtaining the concentration distribution condition and diffusion trend of NO2 in a region by using spectral inversion;3, analyzing the correlation of airborne and vehicle-mounted observation results, and performing data matching; 4, converting the density of a slant column into the density of a vertical column by using a radiation transmission model, and further obtaining the total emission flux of NO 2; 5, obtaining the concentration of initially discharged NO and the proportion of NO2 through Gaussian fittingaccording to real-time wind field data; 6, deducing the NOx attenuation condition by combining an NOx attenuation model in the atmosphere; and 7, finally obtaining the total emission flux of NOx by synthesizing the results. The pollution source emission flux measurement method is more beneficial to mastering the pollution diffusion trend; and by utilizing the airborne and vehicle-mounted synchronous observation method, the attenuation of NOx in the atmosphere is corrected, and the detection precision is improved.