91 results about "Absorption curve" patented technology

An electrophotographic toner is formed of a resinous composition including a binder resin and a wax (A). The wax (A) contains at least 92 wt. % thereof of n (normal)-paraffin comprising a plurality of n-paraffin species having different numbers of carbon atoms, and provides a DSC (differential scanning calorimetry)-heat-absorption curve exhibiting a maximum heat-absorption peak showing a peaktop temperature of 70-90° C. and a half-value width of at most 12° C. As a result of the n-paraffin-rich characteristic and the DSC-thermal characteristic, the wax can exhibit an improved fixability-improving effect without showing an excessive plasticizing effect, whereby the toner can exhibit good fixability as well as good flowability and storage stability.

A toner for developing an electrostatic image includes a binder resin, a colorant and a wax. The toner shows heat-absorption characteristics represented by a DSC heat-absorption curve obtained on temperature increase in a temperature range of 30-150 DEG C. by a differential scanning colorimeter (DSC). The DSC heat-absorption curve shows a maximum heat-absorption peak (P1) in a temperature range of 70-90 DEG C. The DSC curve also provides a differential curve showing a first maximum (Max1) on a lowest temperature side at a temperature (T1) of 50-65 DEG C., showing a second maximum (Max2) on a next lowest temperature side at a temperature (T2) of 65-85 DEG C., and showing a minimum (Min1) on a highest temperature side at a temperature (T3) of at least 95 DEG C. Because of the DSC heat-absorption characteristics, the toner exhibits excellent fixability (including anti-offset characteristic) over a wide temperature range and excellent continuous image forming characteristic.

The invention discloses a method for fusing a high-spectrum image and a visible light image based on nonnegative matrix decomposition. The method comprises the steps that the high-spectrum image is unmixed in a nonnegative matrix decomposition method based on sparsity constraint to obtain an end member spectrum curve; the mixed coefficient of each pixel in the image is solved by constrained quadratic programming according to the spectrum absorption curve of the visible light image and the end member spectrum curve obtained by unmixing; and the end member spectrum curve obtained by unmixing and the mixed coefficient of each pixel are linearly mixed to obtain the fused image of high spatial resolution and high high-spectrum images. The method disclosed by the invention solves the problem that spectra in some wave bands of the high-spectrum image are irrelevant to the visible light image. The high-spectrum image is unmixed by nonnegative matrix decomposition based on sparsity constraint to obtain a more accurate end member spectrum. At the same time the mixed coefficient of the pixel can be obtained by the constrained quadratic programming. The obtained fused image has high spatial resolution and high spectrum resolution.

1-butene based polymer satisfying following requirements (1″) to (4″) provides formed product having low stickiness, superior flexibility and transparency.

• • (1″) Crystalline resin having melting point (Tm−P), not observed or in the range of 0 to 100° C., wherein said melting point defined as the peak top of the peak observed in the highest temperature zone of the melting heat absorption curve obtained by heating a sample of said polymer at a rate of 10° C./minute using Differential Scanning Calorimeter (DSC), after melting said sample in advance at 190° for 5 minutes under nitrogen atmosphere, followed by cooling it to −10° C. at a rate of 5° C./minutes, and keeping it at −10° C. for 5 minutes.
  • (2″) Stereoregularity index {(mmmm)/(mmrr+rmmr)} is at most 20.
  • (3″) Molecular weight distribution (Mw/Mn) measured by Gel Permeation Chromatography (GPC) method is at most 4.0.
  • (4″) Weight average molecular weight (Mw) measured by GPC method is in the range of 10,000 to 1,000,000.

The invention belongs to the technical field of environmental monitoring or chemical analysis, and relates to a field fast detection method for heavy metal ions in water, which combines an electrochemical extraction technology and a spectral analysis technology together. The method mainly comprises the following steps: (1) electrochemically enriching the metal ions; (2) electrochemically dissolving out the enriched metal; (3) carrying out development analysis on the metal ions: 1) selecting a developer, 2) determining development conditions and 3) drawing standard absorption curves; and (4) determining the kind and concentration of the heavy metal ions. The invention has the following positive effects: the defect of difficult distinction between the metal ions at adjacent oxidation-reduction potentials by the conventional electrochemical method is overcome; the influence of higher dirty color degree in polluted water body and other complexity factors on the spectrophotometry result is avoided; spectrophotometry result has high-stability and good-repeatability, thus be capable of conveniently realizing the portability or online field fast detection analysis of the heavy metal ions in polluted samples; and the detection sensitivity can reach less than 0.1 ppm.

A toner, particularly a color toner suitable for full-color image formation through a substantially oil-less heat-pressure fixing device, is formed from at least a binder resin, a colorant and a wax. The toner has viscoelasticity including: a storage modulus at 80° C. (G'80) in a range of 1x106-1x1010 dN/m2, storage moduli at temperatures of 120-180 ° C. (G'120-180) in a range of 5x103-1x106 dN/m2, and loss tangents (tan delta=G''/G' as a ratio between G'' (loss modulus) and G' (storage molecules)) including a loss tangent at 180° C. (tan delta180) and a minimum of loss tangents over a temperature range of 120-180 ° C. (tan deltamin) satisfying 1<=tan delta180/tan deltamin. The toner further exhibits a thermal behavior providing a heat-absorption curve according to differential scanning calorimetry (DSC) showing a maximum heat-absorption peak temperature in a range of 50-110 ° C. in a temperature range of 30-200° C.

The invention discloses a pressure-broadening-based alkali metal stream atomic density measuring method, relating to an alkali metal atomicity density measuring method. The method comprises the following steps of: firstly, producing an alkali metal air chamber filled with positive pressure gas and uniformly heating; secondly, radiating the air chamber by utilizing stable-powder laser and carrying out frequency sweeping so as to measure an absorption curve of the alkali metal, and carrying out negative logarithm taking processing to obtain an optical depth curve; finally, carrying out lorentz nonlinear fitting on the obtained data, acquiring the overall width of a half peak value of a lorentz curve, thus obtaining pressure broadening parameters and further obtaining the air pressure of the filled gas; obtaining the atomicity density of alkali metal steam according to a peak value of the lorentz curve, thereby realizing the measurement of the atomic density and gas pressure intensity of the alkali metal air chamber.

A simplified efficient fertilizer specially used for corn and suitable for saline-alkali land and a manufacturing process thereof are disclosed. The fertilizer comprises, by weight, 25-30% of N, 8-12% of P2O5, 4-8% of K2O, 1-4% of humic acid, 0.2-0.5% of Zn, 0.4-0.8% of Ca and 0.4-1.0% of a nitrification inhibitor. The method and the process are advantageous in that 1) added functional factors comprising the humic acid and calcium superphosphate are acidic and can improve soil alkalinity, and calcium ions of the calcium superphosphate can exchange sodium ions in soil so as to obviously reduce soil salinity, 2) urea-formaldehyde added in a granulation step can obviously improve the granulation rate and granular strength of the fertilizer, thus overcoming a later fertilizer granule efflorescence problem, slow-release nitrogen in the urea-formaldehyde and quickly available nitrogen in urea are combined, thus meeting a corn growth absorption curve and avoiding later nitrogen deficiency for corn, and addition of the nitrification inhibitor reduces nitrogen loss and increases the nutrient utilization rate, and 3) an anti-blocking agent used in the fertilizer is synthesized through saponification, is low in cost, adopts waste grease, is green and meets the strategy of sustainable development.

The invention relates to a method for dyeing linen fabric/fibres by a reduced dye at a high temperature. The method comprises the following steps of: (1) dye selection, namely, in the existence of reduced dyes, a reducer, NaOH and a dye high-temperature stabilizer, completely reducing the dyes into leuco bodies, and then determining the absorption curve of the completely-reduced-state dye solution before and after the treatments via temperature-rising, high-temperature and constant-temperature treatments, so as to find the reduced dye suitable for high-temperature drying; and (2) a dyeing process, namely, preparing the suspension of the reduced dye in a dye vat according to proper dyeing conditions including a bath ratio, a dye amount, the reducer, sodium hydroxide, and the high-temperature stabilizer, adequately reducing and then adding the linen fabric, heating, raising temperature and dying at 100-160 DEG C, then washing by cold water, developing via the complete oxidation of H2O2, performing soap-boiling in liquid soap, washing by hot water, drying and the like. The linen fabric dyed via the high-temperature dyeing process aforementioned is bright in colour, high in colour yield, and especially great in dye permeability.

The invention discloses a signal to noise ratio evaluation device and a signal to noise ratio evaluation method for a rubidium atomic frequency standard, and belongs to the field of atomic frequency standards. The device comprises a first analogue-to-digital sampling unit, a second analogue-to-digital sampling unit and a master control unit. The method comprises the following steps of: drawing an absorption curve according to a corresponding relationship between a frequency discrimination signal and a voltage point of first sweep voltage; drawing a frequency discrimination curve according to a corresponding relationship between a voltage control signal and a voltage point of second sweep voltage; calculating an absorption factor according to the absorption curve; calculating a line width according to the frequency discrimination curve; acquiring a preset modulation depth; and calculating the signal to noise ratio of the rubidium atomic frequency standard by using the absorption factor, the line width and the modulation depth. By the device and the method, the accuracy of the signal to noise ratio of the rubidium atomic frequency standard is improved.

1-butene based polymer satisfying following requirements (1″) to (4″) provides formed product having low stickiness, superior flexibility and transparency.

• (1″) Crystalline resin having melting point (Tm−P), not observed or in the range of 0 to 100° C., wherein said melting point defined as the peak top of the peak observed in the highest temperature zone of the melting heat absorption curve obtained by heating a sample of said polymer at a rate of 10° C./minute using Differential Scanning Calorimeter (DSC), after melting said sample in advance at 190° for 5 minutes under nitrogen atmosphere, followed by cooling it to −10° C. at a rate of 5° C./minutes, and keeping it at −10° C. for 5 minutes.
• (2″) Stereoregularity index {(mmmm)/(mmrr+rmmr)} is at most 20.
• (3″) Molecular weight distribution (Mw/Mn) measured by Gel Permeation Chromatography (GPC) method is at most 4.0.
• (4″) Weight average molecular weight (Mw) measured by GPC method is in the range of 10,000 to 1,000,000.

A two-color photo-detector capable of sensing two colors at a single photo-detector location is provided having a lower photo-detector element resident in the bulk silicon and an upper photo-detector element elevated above the lower photo-detector element. The color sensitivity of each of the photo-detector elements is determined according to the absorption curve of the upper photo-detector element, the thickness of the upper photo-detector element and the color filter array, if any. The elevated upper photo-detector element overlies the circuitry needed for both the upper photo-detector element and the lower photo-detector element. In order to accurately sample color within an array of two-color photo-detectors without a color filter array, two different thicknesses for the upper photo-detector elements of adjacent two-color photo-detectors are used. Therefore, each pair of two-color photo-detectors within the array senses four different colors (i.e., blue and the complement of blue and red and the complement of red). To process the raw color values for compression and storage, a simple color-conversion matrix can be used on a 2x2 block of two-color photo-detectors to convert the four colors (eight color values) to a new color space, such as YCbCr (4:1:1), without traditional demosaicing neighborhood operations.

The invention relates to an LED (light emitting diode) illumination technique, in particular to an LED plant lamp based on chlorophyll absorption spectrum feature design. The LED plant lamp adopts the technical scheme that the LED plant lamp based on the chlorophyll absorption spectrum feature design comprises a light emitting body, a casing, a power source, a first controller, a second controller and wiring terminals, wherein the light emitting body is provided with a first LED light source module and a second LED light source module, the first LED light source module is used for outputting spectrum which is matched with absorption curve spectrum features of chlorophyll a, the second LED light source module is used for outputting spectrum which is matched with the absorption curve spectrum feature of chlorophyll b, the first controller is arranged in the casing, is electrically connected with the power source and is used for controlling the light emitting intensity of the first LED light source module, the second controller is arranged in the casing, is electrically connected with the power source and is used for controlling the light emitting intensity of the second LED light source module, and each wiring terminal is arranged on the casing, and is used for electrically connecting the corresponding controller and the corresponding LED light source module. The LED plant lamp has the advantages that the growth of plants is well promoted, the light intensity of different LED light source modules can be conveniently adjusted, and the requirements of different plants are met.

An automatic and continuous quantitative analysis method and apparatus capable of accurately and quickly quantifying the concentration of each component of a plurality of known components having close infrared absorption regions and similar infrared absorption curve shapes, included in a measurement sample. As a quantification wave number for each component of the plurality of components, a wave number at a tip of one absorption peak that overlaps as little as possible with absorption peaks in infrared absorption spectra of the other components, selected as a particular absorption peak for the component, is specified. A step is repeated in which the concentration of each component of the plurality of components having a prescribed highest order in the measurement sample is quantified from an absorbance at an absorption peak corresponding to the quantification wave number of the component having the prescribed highest order, in the spectrum of the measurement sample or a difference spectrum generated immediately before and from a calibration curve generated in advance for the component having the prescribed highest order, and an infrared absorption spectrum for the component having the prescribed highest order alone, where an absorbance at the quantification wave number for the component having the prescribed highest order is set to have the same intensity as the absorbance is subtracted from the spectrum of the measurement sample or the difference spectrum generated immediately before to generate a difference spectrum.

The invention relates to a brand-new method and a measuring device for a soil moisture characteristic curve, which can measure the moisture characteristic curve in a soil moisture absorption process. The method utilizes a water pulverization theory to generate a humidification condition through uniform water vapor so as to measure parameters (numerical values of pressure and water content) in the soil moisture absorption process. The measuring device comprises a pressure device, an ultrasonic atomizer and a uniform humidifying device, wherein the pressure device is used for quantitatively controlling and measuring the pressure variance of a soil moisture absorption curve process, namely soil water potential variance; the ultrasonic atomizer is used for generating ultramicro water particles of 1 micrometer to 5 micrometers, and the uniform humidifying device realizes the uniform moisture absorption of test soil samples under a set pressure condition and can ensure that no partial saturated soil water flow phenomenon can occur in the moisture absorption process. The invention provides necessary scientific bases for researching soil water moving characteristics and tri-water transformational relation in a water circulating process, agricultural scientific irrigation and crop growth.

The invention relates to an isothermal adsorption curve correction method based on a gravimetric method. The method comprises steps of carrying out a blank test before a rock core isothermal adsorption test, calculating the volume of a sample barrel under different test pressures, and finely characterizing the dynamic change of the volume of the sample barrel under different test pressures; respectively carrying out pretreatment test, buoyancy test and methane isothermal absorption test of a granular sample which is crushed to a laboratory test standard, in a buoyancy test phase, finely representing the dynamic change characteristics of the sample and the sample barrel under different test pressures, in combination with the dynamic change of the volume of the sample barrel under the same test pressure, constructing a dynamic change mathematical model of the sample volume under different test pressures, realizing fine representation of the sample volume under different test pressures, calculating the adsorbed state methane mass under different test pressures in the methane absorption test stage based on the fine representation, and drawing an accurate isothermal absorption curve based on a gravimetric method. The method can effectively guide evaluation of coal bed gas, shale gas and other unconventional natural gas resources.

An organic photoelectronic device includes a first electrode and a second electrode facing each other, and an active layer between the first electrode and the second electrode and including a first compound represented by Chemical Formula 1 or 2, and a ratio between a FWHM of a light absorption curve depending on a wavelength of the first compound in a solution state and in a thin film state satisfies the following Relationship Equation 1: FWHM2/FWHM1<2.5. In the Relationship Equation 1, FWHM1 is a FWHM of the light absorption curve depending on a wavelength in a solution state, and FWHM2 is a FWHM of the light absorption curve depending on a wavelength in a thin film state.

The subject matter of the invention is a method of determining, by means of absorption spectroscopy, the pressure of a gas or gas mixture in a vacuum container located in an environment that also contains the gas to be measured, but at a pressure different from that in the vacuum container, comprising a laser and a laser detector, the absorption curve A_R(λ) of the gas to be determined being determined in the beam path between laser and detector in a first step, the vacuum container being placed into the beam path and the absorption curve A_M(λ) of the gas to be determined being determined in the beam path into which the vacuum container has been placed in a second step, that the absorption curve A_R(λ) is made to coincide by compression with the absorption curve A_M(λ) outside of the absorption curve of the gas to be measured, the extent of compression being determined by a proportionality factor c, the following relation applying for determining the gas to be measured in the vacuum container:

A_G(λ)=A_M(λ)−c·A_R(λ).

The invention relates to a rubber thermo-oxidative aging dynamic testing device and a method for testing a thermo-oxidation absorption curve. The testing device comprises a testing board, a vacuum-pumping oxygen-supply system, a temperature control system, an oxygenating system, and an automatic recording system, wherein the testing board is in an integrated structure, the testing chambers are symmetrically arranged in the testing board, a center temperature measurement sensor and an edge temperature measurement sensor are respectively arranged at testing board center and edge position, a heating zone and a heat-insulation layer are arranged at peripheral part of the testing board in order; a pressure sensor is arranged on a sealing end of the testing chamber, the testing chamber and the vacuum-pumping oxygen-supply system are respectively communicated, the heating zone and the temperature control system are connected, and the oxygenating system and the automatic recording system are connected. The device is capable of accurately and rapidly testing the thermo-oxidizing performance of the rubber with batches.

The invention discloses an X-ray energy measuring system for an accelerator, comprising an X-ray dosage detection device, a collection device and a discriminator, wherein the X-ray dosage detection device comprises a plurality of detectors which are arranged at intervals in parallel, wherein signals of adjacent detectors are isolated so as to prevent signal crosstalk between each detector; a collection device; and a comparison device which includes a storage unit for storing a standard absorption curve of a standard energy accelerator on the X-ray dosage detection device, wherein the X-ray detection device is exposed through a series of standard energy accelerators so as to obtain a series of standard absorption curves corresponding to the energy stages of the series of standard energy accelerators; and a computation unit for executing comparison of the absorption curves with the standard absorption curves so as to determine the energy the accelerator to be detected.

The invention belongs to the technical field of chemical and spectrum analysis and test, and particularly discloses a spectrophotometry quantitative analysis method of an iodine-starch color-developing system. The spectrophotometry quantitative analysis method specifically comprises the steps of: (1) in a volumetric flask, taking a quantitative I<->-containing solution to fully react with an excessive FeCl3 solution at room temperature; (2) adding a certain amount of starch solution in the volumetric flask, shaking up; (3) immediately adding distilled water in the volumetric flask for diluting until the solution is close to the neck part of the volumetric flask, shaking up; (4) immediately adding a defined amount of H2O2, shaking up, metering the volume by using the distilled water, shaking up; (5) measuring an absorption curve at 400-700nm by using FeCl3 as a blank control to determine a measurement wavelength; (6) preparing color-developing systems with different iodine concentrations by using an I<-> standard solution according to the method of (1)-(4), measuring absorbancy A by using the measurement wavelength, establishing a standard curve by using a correspondence between the I<-> concentration c and the A value, and obtaining an equation of linear regression and a coefficient of association; and (7) measuring the absorbancy A of a color-developing system of an unknown I<->-containing solution according to the method of (1)-(4), and calculating the concentration of I<-> in the system to be measured according to the equation of linear regression in the (6). The spectrophotometry quantitative analysis method is stable in color-developing system, can be directly and indirectly used for iodine amount analysis, has the advantages of convenience, accuracy, trace amount, rapidness, low cost and the like, and can be widely applied.

The invention discloses a photocatalysis separating film performance detecting device and the detecting method. The device relates to a photocatalysis separating film (3) which is positioned between a container of an object to be degraded (2), the inlet of which is connected with a flow sensor (10), an electromagnetic regulating valve (11), a pressure increasing and reducing device (12) and a container of an object to be detected (13) in turn and a reagent container (6), the outlet of which is connected with a detector (4); an optical source (1) is arranged in parallel with the photocatalysis separating film (3); the flow sensor (10), the electromagnetic regulating valve (11), the pressure increasing and reducing device (12) and the detector (4) are all electrically connected with a computer (8); the method includes preparing a fluid, selecting the detector, confirming the optical source, controlling the degrading process by the computer and calculating the photocatalysis quanta efficiency and the absorption amount of the photocatalysis separating film according to a formula of Rho is equal to r/Phi and an absorption curve through the concentration of the fluid and the data detected by the detector; thereby obtaining the performance of the photocatalysis separating film. The invention can automatically and comprehensively detect the performance of the photocatalysis separating film.