109 results about "Water index" patented technology

The invention discloses a rice yield remote sensing estimation method based on MODIS data, which comprises: 1) acquiring the MODIS09 remote sensing data in the growth process of the rice in the region to be monitored, and calculating an vegetation index EVI and a water index LSWI; 2) extracting a rice pixel based on the relation between the water index LSW1 and the vegetation index EVI; 3) acquiring the vegetation index EVI corresponding to the rice in different stages; 4) calculating the average of the vegetation indexes EVIs of different set administrative regions in different stages to acquire the average EVI of the set administrative regions; 5) establishing a statistical model for the average EVI of the set administrative regions and the rice yield; and 6) estimating the rice yields of the set administrative regions using the vegetation index EVI in the growth period of rice in the year to be estimated, and calculating the rice yield of the region to be monitored. The temporal resolution, the spatial resolution and the estimation precision of the invention are relatively high, and the invention is applicable to monitoring rice yield in a large scale.

The invention provides a fluid logging oil-gas-water interpretation method based on an oil-gas-water index chart. The fluid logging oil-gas-water interpretation method is characterized by comprising the steps that parameters are collected, wherein the fluid logging parameters comprise heavy hydrocarbon components; the parameters are pre-processed, and the parameters capable of reflecting fluid quality changes in a stratum are selected; the parameters are calculated, wherein three derivative parameters comprising an oil index, a gas index and a water index capable of directly reflecting oil-gas-water characteristics are selected; the oil-gas-water index standard chart is built, wherein according to the a known oil test conclusion, a graphical bar is drawn on the basis of the three derivative parameters comprising the oil index, the gas index and the water index; parameter calculation is conducted on a target layer; the target layer is evaluated according to the standard chart. According to the fluid logging oil-gas-water interpretation method, quality of oil-gas-water in a collection layer is identified and judged by means of the fluid logging technique, a hydrocarbon reservoir is evaluated timely and accurately, and basis data are provided for selection of a well test method in follow-up shaft work, formulation of a test measurement, and selection of a test scheme timely.

The invention provides a method for refinery waste water treatment by multi-stage air-sparged hydrocyclone technique, which can high effectively recycle floating oil, dispersed oil and emulsified oil of the refinery waste water, and eliminate most of suspension at the same time. The invention is mainly characterized in that: through setting at least two-stage air-sparged hydrocyclone, and combining the use of demulsifier, coagulant and coagulant aids, physiochemical treatment is carried out to high concentration oily waste water produced by all devices during the refinery process, and the releasing water after treatment can meet the biochemical stage water indices of normal waste water treatment field. The technique of the invention can substitute the physiochemical treatment stage (the first stage treatment) of the existing refinery waste water treatment process, and is characterized by high effect, occupying small land, and saving the investment, etc.

The invention discloses a technology and a device for processing waste water of an oil gas filed. The technology for processing waste water comprises a preprocessing step and an advanced processing step, wherein the preprocessing step uses the method of electric floating processing and coagulation depositing processing, and the advanced processing step comprises oxidization processing, second-stage coagulation depositing processing, filtration and quality regulating processing. The device for processing waste water comprises a preprocessor and an advanced processor which are orderly arranged, and the preprocessor comprises an electric floating processor and a first-stage coagulation depositor which are orderly arranged. The invention has the advantages that the waste water processing effect is good, under the normal condition, the out-water index after the processing of the waste water from oil (gas) exploration can reach the first-grade standard of GB 8978-1996, and the out-water index after the processing of the waste water from well drilling and repair and underground work can reach the second-grade standard of GB8978-1996. The device for processing waste water has strong processing performance, low energy consumption and high automatic degree, and in the normal running condition of the whole device, only two people are required for cooperation and operation.

The invention belongs to the technical field of chemical wastewater treatment, and in particular relates to a white carbon black production wastewater treatment technology. The technology comprises the steps of pretreating white carbon black production wastewater so that the water quality of the treated wastewater can reach the water quality requirement of a membrane treatment system; carrying out membrane filtration so that enriching sodium sulfate in the wastewater is enriched at one side of a membrane until the content of sodium sulfate is not less than 10% and the produced water at the other side reaches a recycle water index and is recycled to a production system for reuse; carrying out freezing crystallization on the thick water to separate out mirabilite, separating out the crystallization mother liquor so as to obtain the mirabilite and returning the crystallization mother liquor back to a membrane concentration system, and thermally dehydrating the mirabilite so as to obtain anhydrous sodium sulphate which is not less than 98% and used for selling; or evaporating and crystallizing the thick water with the sodium sulfate being not less than 10% through directly utilizing an evaporator so as to separate out the anhydrous sodium sulphate. The water source recycling and chemical raw material recovery are realized through low energy consumption. Through cooperatively using two technologies, the energy consumption for treating each tonnage of wastewater can be greatly reduced, and the water recovery rate of a whole treatment system is not less than 92%; the sodium sulfate content of an anhydrous sodium sulphate product is not less than 98%.

The invention discloses a method for extracting glacial lakes in a highland area based on a remote sensing satellite image. The method comprises the steps of (1) obtaining the remote sensing satelliteimage and DEM data and carrying out pre-processing on the remote sensing satellite image and the DEM data, (2) carrying out global glacial lake crude extraction which comprises a step of obtaining anormalized different water index (NDWI) value of a whole region according to pre-processed remote sensing satellite image, combining a near infrared reflectance (NIR) value and a short wave infraredreflectance (SWIR) value, setting threshold values of NDWI, NIR and SWIR for the whole image, and eliminating the influences of glaciers and other ground features and a step of generating a slope mapof the area by using pre-processed DEM data, setting a slope threshold value and removing the effect of a hill shadow, and roughly extracting all glacial lakes and mixed backgrounds, and (3) carryingout local glacial lake fine extraction which comprises the steps of introducing a C-V model of a symbolic pressure function to accurately extract the glacial lakes one by one based on a result of glacial lake crude extraction. According to the extraction method of the invention, various factors affecting the extraction of the glacial lakes can be effectively removed, accurate extraction is achieved, and the method also has a good extraction result for smaller glacial lakes in the image.

The invention discloses a method for accurately identifying ground features in a satellite remote-sensing image. The method comprises steps of: extracting vegetation and water areas according to a vegetation index and a water index of multispectral image data registered with a satellite remote-sensing panchromatic image, and determining a specific category according to the geometrical morphological characteristics of the vegetation and water areas; according to the gray characteristics of the ground features, segmenting the extracted satellite remote-sensing panchromatic image of the vegetation and water areas into different areas by using gray consistency technology, and extracting factory areas according to the geometrical characteristics of the areas; determining that the rest areas are man-made ground feature areas after the factory areas and the vegetation and water areas are extracted, segmenting the man-made ground feature areas by using a textural feature extracting method, and performing a SVM classification identification process according to the textural feature of each segmented man-made ground feature area in order to obtain the specific category of each man-made ground feature area. The method may accurately detect and identify the ground features in the satellite remote-sensing image.

The invention discloses a standard reaching to ground surface water grade IV water urban sewage treatment process, which comprises the following treatment steps that the urban sewage is subjected to pretreatment so as to remove sand, stone and big particle materials in the sewage; after the pretreatment, different-point water feeding is performed to a pre-denitrification and anoxic pool; outlet water subjected to pre-denitrification sequentially passes through an anaerobic pool, the anoxic pool, an aerobic pool, a secondary sedimentation tank, a magnetic or sand loading flocculation deep dephosphorization settling pool and a reaction unit for sterilizing and oxidizing rest organic matters and improving dissolved oxygen in water, and is discharged after the standard reaching; mud water in the secondary sedimentation tank flows back to the pre-denitrification pool; mud water in the aerobic pool flows back to the anoxic pool; a carbon source can be additionally fed into the anoxic pool; the preferable carbon source and the carbon source precise control mode are favorable for the target realization; the problem of the conventional grade IV water standard reaching is solved through oxidization, sterilization and oxygen charging measures. The process has the advantages that the multiple regions are used for reasonably allocating the inlet water; the carbon source is sufficiently utilized; the sludge age is more reasonable; various conventional problems and the practical problem that the grade IV water standard is difficult to reach are solved; each outlet water index is enabled to stably reach the grade IV water standard.

The invention discloses a method for extracting mountain river information. The method comprises the following steps: performing radiation calibration, atmospheric correction, mosaicing and cutting processing on remote sensing image data information of a land satellite Landsat 8 OLI; calculating a composite spectral threshold water index; extracting a mountain shadow of a study area according to DEM data of the study area; extracting a river network of the study area according to the DEM data of the study area, and establishing a river buffer area; calculating the land surface temperature of the study area; calculating surface albedo of the study area; calculating the NDBI (normalized difference build-up index) of the study area; resampling the land surface temperature, surface albedo andNDBI layer of the study area for standard treatment to eliminate incorrectly extracted building information; performing small hole elimination and gap filling on the extracted small rivers in the study area are filled by closed operation and filtering operation in mathematical morphology filtering. The technical problem that accuracy of information extraction for mountain rivers in the prior art needs to be improved is solved.

The invention relates to a purple heart pitaya planting and a cultivating method. The method comprises the steps that 1, seeding stage management: at the early stage of characterization , one time of watering is conducted every 2 to 3 days, and timely drainage is conducted in rainy season; 2, at the initial planting period, emergency crops can be interplanted in a new orchard. Sod culture is adopted to the cultivating management once the pediciel of the pitaya climbs to the top of a pillar. Ridge plowing and root covering are conducted according to the root baring situation after raining, and ridge plowing to protect seeding is conducted in winter in the new orchard; 3, scientific fertilizer and water index; 4, pruning; 5, flower and fruit thinning and fruit bagging; 6, pest control: priority is given to the agricultural, physical and biological control, and chemical control is supplemented; 7, reaping and marketing timely. According to the purple heart pitaya planting and cultivating method, three-dimensional management is adopted into the planting of the purple heart pitaya, the production management is convenient, the taste of the purple heart pitaya is good, and the yield is high.

The treating process of waste water containing low concentration ammonium chloride includes the following steps: separating water and recovering, reverse penetrating film concentrating treatment of waste water containing ammonium chloride and reusing of purified water, concentrating water via evaporation to recover ammonium chloride and returning condensated water to membrane system for retreatment. The present invention has low power consumption, low production cost and technological advance, and can produce purified water reaching industrial pure water indexes and recover ammonium chloride completely.

The invention discloses a method and a device for rapidly positioning water color abnormity based a remote sensing image, and belongs to the field of water pollution monitoring. The method comprises the following steps: obtaining the remote sensing image, and extracting a water area part; calculating the normalized water index of the water area, and performing mean calculation by using a mean operator; comparing the mean-calculated normalized water index distribution image with a water color abnormality judgment threshold to obtain a water color abnormity window distribution image; performingmask operation on the normalized water index distribution image by using the water color abnormity window distribution image to obtain a preliminarily-determined water color abnormity area distribution image; and comparing each pixel of the preliminarily-determined water color abnormity area distribution image with the water color abnormity judgment threshold to obtain a water color abnormity area. Scale conversion is performed by using the mean operator, so the comparison frequency is reduced, the processing time is greatly shortened, the speed and the accuracy of water color abnormity detection are improved, and a technical support is provided for the environmental emergency management department.

The invention belongs to the technical field of aquaculture, and particularly relates to a lowly-released microorganism water quality improver for aquaculture and a preparation method of the improver. The improver is prepared from, in weight percentage, 30%-50% of compound microorganism bacterium agents, 40%-60% of nutritional agents, 1%-5% of thickening agents and 1%-10% of stabilizers, and the number of microorganism living bacteria exceeds 2 billions/g. according to the improver, harmful substances effecting growth and reproduction of fishes in water are utilized, transformed and degraded by the aid of growth and metabolism of functional microorganisms, so that the water is purified, the lowly-released microorganism water quality improver overcomes shortcomings of a traditional biological improver, large fluctuation of water indexes is avoided, abnormal physiological reaction of aquaculture animals is avoided, influence of external factors such as water temperature, water quality and drug residues on action effect is reduced, the improver is long in action period and can keep water environments for a long time, and aquaculture cost is reduced.

The invention relates to cultivation of freshwater fishes, in particular to a technique of rearing fry of the obscure puffer in low salinity sea water. The technique includes: selecting a pond; sterilizing the pond; cleaning the pond; injecting water and applying fertilizer; preparing for use of oxygenation facilities, and stocking the fry; managing rearing; spreading a net for exercise, distributing the fry to more ponds, and domesticating and feeding. The technique is characterized in that fry bags are allowed to float in the ponds before estuary soil ponds are selected and the fry are put in; pond water is then injected into the bags; the fry bags are shaken and stocked until interior salinity and water temperature of the fry bags and the pond water are moderate; fry stocking density is 8000-10000/mu; the water indexes include 5-15%. of sea water salinity, 16-28 DEG C of natural water temperature, larger than 5mg/L of dissolved oxygen, 7.5-8.5 of pH, and 30-50cm of transparency; when growing to 2.8cm long, the fry are domesticated with artificial feed; when growing to 3cm long, the fry are distributed into the ponds; the net is spread for exercise 1-2 days before distribution; stocking density of summerlings in each pond is 1500-5000/mu.

The invention discloses an optical remote sensing image vegetation and water body information automatic extraction method comprising the following steps: obtaining an optical remote sensing data sample, and randomly extracting 10% of the optical remote sensing data sample as a sample subset; calculating normalized vegetation indexes and normalized water indexes of all the samples in the sample subset, obtaining a general characteristic spectrum to execute supervised classification based on a minimum spectral angle on all the samples in the sample subset, and recording vegetation types, water body types and the sizes of the minimum spectral angles corresponding to other types at the same time; taking the minimum first 50% of samples in the minimum spectral angles, performing k-means unsupervised classification based on the minimum Euclidean distance on the first 50% of samples, obtaining 10 characteristic spectrums for each type, totally 30 characteristic spectrums, and performing supervised classification based on the minimum Euclidean distance pixel by pixel on the global image to obtain an extraction result of vegetation and water. Any prior sample is not needed for supporting from beginning to end, manual intervention is avoided, and full-automatic extraction of vegetation and water body information is achieved.

The invention aims to provide a method for treating collophanite positive and reverse flotation beneficiation wastewater. In the method, a dual-base method is adopted to make various ions being not beneficial to a beneficiation flotation process in the wastewater precipitate to be removed. The method comprises the following concrete steps of: (1) firstly, adding refined lime to the collophanite positive and reverse flotation beneficiation wastewater for reacting to obtain a reaction system containing sediments, and marking as the reaction system 1; (2) adding soda ash to the reaction system 1 for reacting to obtain a reaction system 2 containing the sediments; and (3) making the reaction system 2 precipitate and removing the sediments to obtaine the treated collophanite positive and reverse flotation beneficiation wastewater. The wastewater treated by the process completely meets the beneficiation water index requirement, and the recovery rate of the water is not less than 99 percent. The process reduces the beneficiation water cost and meanwhile also avoids environmental pollution caused by the reason that the wastewater is directly discharged.