43 results about "Photoelectric absorption" patented technology

A method of measuring characteristics of a geologic formation, using the time, energy and spatial spectra of gamma rays induced by an accelerator, which allows (i) the measurement of the photoelectric absorption (Pe) factor of the formation using a gamma-ray spectrum detected from gamma rays induced in the formation, (ii) the calculation of a neutron porosity of the formation using the gamma-ray spectrum, and (iii) the determination of a bulk density of the formation using the spectroscopic measurements. The Pe factor may be inferred by directly mapping the spectroscopic measurements. The porosity may be calculated by relating the gamma-ray spectrum to a hydrogen content of the formation. The density may be determined by computing a gamma diffusion length of the formation based on the gamma-ray spectrum. In addition to these measurements, the resistivity of the formation and its spontaneous potential may also be measured using an electromagnetic induction system.

A method for inferring the photoelectric absorption of a formation by directly mapping spectroscopic measurements of gamma rays induced in the formation using a fast neutron source. The mapping is accomplished by creating a polynomial function based on counts of gamma-ray events in the gamma-ray energy spectrum; the coefficients of the polynomial function are determined in known calibration environments, and the value of the polynomial is the inferred photoelectric absorption parameter. The spectroscopic measurements are preferably generated by sorting gamma-ray counts of the gamma-ray spectrum into a plurality of energy-dependent channels, and measuring these gamma-ray energy distributions during different portions of the firing cycle where different types of dominant gamma-ray production reactions occur.

A single plane Compton telescope uses a coplanar array of detectors to determine the direction of a radiation source. Detector materials and dimensions may have comparable Compton scattering and photoelectric absorption probabilities, so scattered photons have a high probability of escape from the detector in which the initial interaction occurs, while being absorbed in adjacent detectors. Energy information from coincident interactions between two detectors defines a bearing plane that contains the radiation source; by comparing these interactions in two non-parallel directions, the source is localized to a line representing the intersection of two bearing planes. Energies may be summed to determine the initial photon energy. The array may be of a single detector type or an arrangement of different detector types. The array may be a stationary, planar configuration of at least three detectors, or a linear array of at least two detectors that is rotatable within a selected plane.

The invention discloses an ionizing-radiation-preventive composite material and a preparation method thereof. In the ionizing-radiation-preventive composite material, basalt fiber is high in content of heavy-nucleus elements like iron and manganese, and the heavy-nucleus elements improve absorbing and scattering effect on high-energy ionizing radiation of the basalt fiber, so that compared with other reinforced fiber, the basalt fiber has better ray shielding performance; due to special atomic energy level, rare earth oxide has strong photoelectric absorbing effect on rays of 10-80 keV, and weak absorbing area that the heavy-nucleus elements have within the range can be filled up, so that shielding performance of the basalt fiber composite material on wide-energy-range rays is improved remarkably. The rare earth oxide, a resin matrix and the basalt fiber mutually cooperate and mutually act, so that the ionizing-radiation-preventive composite material has good radiation-preventive performance and mechanical performance.

The invention discloses a densified sandstone air layer identification evaluation method free from the influence of a frame. The method comprises: performing array sonic logging in wells in an area, according to the standard process of array sound wave data processing, performing calculating and analyzing, and solving a volume compression coefficient and a Poisson's ratio curve; for a ground layer with a similar lithology, according to the relative mirror image relation between the volume compression coefficient and a Poisson's ratio, identifying the fluid property of a storage layer by use of a superposition method; for a ground layer with a quite large lithology difference, according to a photoelectric absorption cross section index PE, mud quality content, and other lithology component contents, performing frame influence eliminating correction, reconstructing the relative mirror image relation between the volume compression coefficient and the Poisson's ratio, and accordingly, performing identification on the fluid property of the storage layer; and constructing a "mechanical characteristic parameter interpretation template" suitable for the local area, and performing fluid property identification on different lithology storage layers. According to the invention, the frame influence eliminating correction is carried out on the different lithology storage layers, so that the fluid property identification accuracy of the storage layer is improved.

The invention discloses a high-sensitivity ultraviolet light detector. An ultraviolet-light absorption-type organic film is taken as a photoelectric absorption layer so as to absorb ultraviolet light and grapheme with high mobility is taken as a current channel transmission carrier. Photoelectric reaction time can be greatly shortened and photoelectric sensitivity of a device is increased. Simultaneously, the grapheme and the organic film are flexible materials so that a feasible scheme is provided for flexible integration of the device.

The invention belongs to the field of oil and gas, and particularly relates to a method for determining the tufaceous content of high-gamma sandstone. A volume model of a rock and volume models of the components of the rock are established, and a tufaceous content determining method based on nested volume models is formed. The method comprises the following steps: standardizing well logging data; establishing a rock volume model, and determining the composition and content of the framework, tuffaceous and mud in the rock; adopting a photoelectric absorption cross section index-natural gamma ray method to identify a high-gamma sandstone reservoir interval based on a well logging curve; selecting a well logging curve for determining the tufaceous content; using a nested volume model to determine the well logging parameter of the rock framework; using a nested volume model to determine the well logging response parameter of tuffaceous; using a nested volume model to determine the well logging response parameter of mud; determining the well logging response parameter of pores according to the type of fluid; and establishing a rock volume model equation, and determining the tuffaceous content. According to the invention, a nested two-layer volume model is adopted, and the explaining result is more accurate.

The invention discloses a method for calculating the photoelectric absorption cross-section index of a stratum based on X-ray litho-density logging. The method adopts an X-ray litho-density logging device and comprises the following steps that 1, X rays released by an X-ray source have a photoelectric effect and Compton scattering effect with the stratum, and are then received by a detector, the X-ray spectrum detected by the detector is taken as a basis to select and count low-energy windows and high-energy windows as NL and NH respectively, and then the photoelectric absorption cross-sectionindex U per volume of the stratum is calculated; and 2, the relation between the volume and the photoelectric absorption cross-section index is utilized, wherein Pe can be represented as Pe=U/rho e,and rho e represents the electron density index of the stratum. During X-ray litho-density logging, rho e serves as one of the measurement parameters, and can be regarded as a known number when the photoelectric absorption cross-section index is calculated. By means of the method, the influence of the density of the stratum on the measurement of the photoelectric absorption cross-section index Peof the stratum can be effectively eliminated, and the measurement accuracy is greatly improved.

The invention relates to a photochromic ink-based bank note detection method and provides a photochromic ink-based detecting and anti-counterfeiting means specific to variable-color optically-variable figures and variable-color optically-variable safety lines on 2015-edition Chinese 100 yuan banknotes. The method specifically comprises the steps of placing a to-be-detected bank note on a horizontal plane; irradiating the white light onto the photochromic ink part of the to-be-detected bank note by an LED white-light lamp, and reflecting and driving the white light to leave the photochromic ink part of the to-be-detected bank note after the refraction, the reflection and the interference of the light; respectively arranging a photoelectric absorption device right above and obliquely above the photochromic ink part of the to-be-detected bank note that is irradiated by the white light; respectively and electrically connecting the above two photoelectric absorption devices with a photoamplifier circuit, switching on a photoelectric signal processing system and a recognition processing system, amplifying an electrical signal, sending the amplified electrical signal to the photoelectric signal processing system and the recognition processing system for comparison and judgment, recognizing whether the photochromic ink of the to-be-detected bank note is normal or not, and judging the authenticity of the to-be-detected bank note. According to the method, the method has the advantages of fast detection speed, strong pertinence and good anti-counterfeiting effect.

The invention relates to a high-efficiency thin-film solar component battery structure and an implementation method thereof, and belongs to the technical field of solar battery application. The technical scheme is as follows: the high-efficiency thin-film solar component battery structure comprises a piece of substrate glass, a front electrode film, a photoelectric absorption layer, a back electrode film, a packaging film and a back board; each photoelectric unit is connected in series to form two or more sets of photoelectric battery parts and then each photoelectric battery part is connected in parallel to form an integral thin-film component structure by adjusting etching times and etching positions of laser isolation channels, namely, each photoelectric unit is connected in series and then connected in parallel to form the integral component battery structure. In the invention, under the precondition that the power is basically not weakened, output voltage of the component can be efficiently reduced by adjusting the series and parallel connection structure among the photoelectric units in the thin-film solar battery component, and the matching flexibility of the thin-film battery component and fittings of a photovoltaic power generation system, such as an inverter, a controller and a storage battery; moreover, the BOS (basic operation system) cost of the system is reduced, and simultaneously the shading resistance performance of the component is efficiently improved.

The invention discloses a rapid lithology identification method for calculating relative percentage content of quartz. The rapid lithology identification method comprises the following steps of 1) acquiring the chipping component information of quartz, feldspar and rock debris; 2) determining the sandstone type of the reservoir in the research area; 3) establishing a division standard for determining the sandstone types based on the relative percentage content of quartz; 4) selecting the compensation density, the photoelectric absorption cross section index and the deep resistivity as the sensitive logging curves reflecting the reservoir lithology; 5) establishing a nonlinear mapping relation model between the logging curve of the compensation density, the photoelectric absorption cross section index and the deep resistivity and the quartz relative percentage content; and 6) determining the relative percentage content of quartz in the prediction well, and performing the lithology identification according to the division standard of determining the sandstone type based on the relative percentage content of quartz, so that the rapid identification of the quartz property can be accurately realized based on the relative percentage content of quartz.

The invention relates to a package structure of a variable optical attenuator multiplexer. The package structure of the variable optical attenuator multiplexer comprises a package box composed of an upper cover and a lower bottom, wherein a control circuit board is fixed to the lower bottom, a silicon waveguide mode array variable optical attenuator and an array waveguide optical grating are fixed to the control circuit board, and a fiber channel of the silicon waveguide mode array variable optical attenuator and a fiber channel of the array waveguide optical grating are correspondingly connected through fibers. Meanwhile, the invention relates to a manufacturing method of the package structure. The silicon waveguide mode array variable optical attenuator based on the photoelectric absorption effect is adopted to manufacture the variable optical attenuator multiplexer, the reliability is good, the response speed is high, the response time reaches the microsecond level, heating is not required, and power consumption is lower.

The embodiment of the invention provides a compound solar cell containing a superlattice structure back field, and belongs to the technical field of solar cells. The highly doped tunnel junction region of the solar cell comprises a highly n-type doped n++ layer and a highly p-type doped p++ layer which are sequentially arranged from bottom to top, the back field region comprises a superlattice structure formed by an InAlAs layer and an InP layer pair, the p layer of the photoelectric absorption region adopts Iny1Ga1-y1Asx1P1-x1, 0<=x1<=1, 0<=y1<=1, the doping element is Zn, Mg, Be or C, and the doping concentration is 5*1015cm-3-1*1017cm-3. According to the solar cell, the energy band arrangement of the photoelectric absorption region and the back field is changed, multiple interfaces contained in the doped wide-band gap material InAlAs and narrow-band gap material InP superlattice effectively inhibit the influence of diffusion of a highly-doped tunnel junction region on a photoelectric absorption conversion region, the reduction of the open-circuit voltage of the solar cell caused by diffusion is decreased, and the quality of the pn junction of the photoelectric conversion absorption region is improved, so that the efficiency of the solar cell is improved.

The invention relates to the field of power network dispatching optimization, in particular to a power system optimal dispatching method considering photoelectric access, comprising the following steps: A) making a plan ahead of schedule; B) dividing a day into time periods accord to time T as a unit, establishing and initializing each photoelectric field quality score Kw, updating that day-aheadplan accord to each photoelectric field quality score Kw to form an intra-day plan; C) real-time controlling that conventional unit to execute the intra-day plan within the time period, tracking the output of each photoelectric field and the output level of the conventional unit, calculate the photoelectric absorption income E at the end of the time period, updating the quality score Kw of each photoelectric field according to E, and repeating the step B-C until the day's scheduling is complete. By setting the quality score of the photoelectric field and tracking the actual effect of photoelectric dissipation, and feeding back to the intraday plan, the photoelectric dissipation is more active and the economic benefit of the photoelectric field is brought into full play.

The invention relates to a laminated two-color infrared focal plane detector and a preparation method thereof and belongs to the technical field of semiconductor photoelectronic devices. A distributedBragg reflector structure is introduced into a laminated InAs/GaSb two-color superlattice structure photosensitive chip; and infrared light, which is not completely absorbed, of laminated two-color photosensitive absorption regions is reflected separately, so that the infrared light returns to the absorption regions again. Reflector layers are adopted by two channels of the laminated two-color infrared detector, so that the photoelectric absorption efficiency of the corresponding channel of the chip is improved and the target of improving the performance index of the device is achieved, and meanwhile, the difficulty in epitaxial growth of a first channel epitaxy structure layer and a second channel epitaxy structure layer is correspondingly reduced.

A signal processing method is disclosed, which includes detecting a total intensity of X-rays passing through an object comprising multiple materials; obtaining at least one set of basis information of basis material information of the multiple materials and basis component information of photon-electric absorption basis component and Compton scattering basis component of the object; estimating a scatter intensity component of the detected X-rays based on the at least one set of basis information and the detected total intensity; and obtaining an intensity estimate of primary X-rays incident on a detector based on the detected total intensity and the estimated scatter intensity component. An imaging system adopting the above signal processing method is also disclosed.

The invention discloses a vacuum tube, comprising an electronic emitter. A photoelectric absorption face is arranged around the outer periphery of the center of the electronic emitter of the vacuum tube. The invention provides a technique for reducing useless light in a display and is especially suitable for a sphere focus style. The invention provides a technique which is good for the stable and continuous work of vacuum tube, good for prolonging service life and reducing corresponding electronic circuit load or the electronic circuit load of corresponding instruments and equipments.

The present invention discloses a solar support with an adjustable angle, which comprises a solar support main body which is composed of a hydraulic lifting pipe arranged at the top of the solar support main body and a fixed mounting bracket arranged at the bottom of the solar support main body. A plurality of uniformly distributed battery plate holders are arranged on the side surface of the solar support main body. The battery plate holders are arranged in parallel and are fixedly connected with the solar support main body. The solar support with the adjustable angle is designed as a wholly-movable structure. The solar support main body is adjusted in angle by a hydraulic lifting pipe, which not only facilitates the installation of the solar battery, but also enables the solar battery to better perform photoelectric absorption conversion treatment by changing the angle, thereby improving the power generation efficiency of the solar support with the adjustable angle.