401 results about "Self-absorption" patented technology

The invention discloses a fluorine-free preparation method for a three-dimensional porous silica powder anode material of a lithium ion battery. In the method, combination reaction is performed on ordinary micron-sized silicon and magnesium particles to generate magnesium silicide, and the magnesium silicide is pyrolyzed at high temperature to form magnesium vapor and silica powder with a three-dimensional porous structure. By the fluorine-free preparation method for the three-dimensional porous silica powder anode material of the lithium ion battery, a preparation process is free from fluorine so as to avoid environmental pollutions; the material has the porous structure so as to realize the self-absorption of volume effects of the silicon particles; the specific capacity and recycling stability of the material are improved to a certain extent; and a synthesis process is simple and easy to operate, and the preparation cost of the material is low.

The invention discloses rare-earth doped oxyfluoride tellurate scintillation glass and a preparation method thereof. Raw materials TeO2, PbF2, BaF2 and Gd2O3 of the scintillation glass are high-density compounds, so the obtained oxyfluoride tellurate glass has high density, and the density can reach over 6g / cm<3>. Compared with the traditional scintillation glass containing the raw materials PbO, Bi2O3 and the like according to the raw material formula, the scintillation glass of the invention has high short wavelength blue-violet light transmittance and avoids self absorption of the glass; wide wave band also can transmit visible light; the Gd2O3 raw material contained in the scintillation glass can sensitize the luminescence of rare-earth ions such as Tb3+, Ce3+ and the like and greatly improves the output of scintillation light; therefore, the scintillation glass has the advantages of high density, strong scintillation light emission and output, wide wave band and good short wavelength transmission performance. The preparation method for the scintillation glass is simple and has low production cost.

Provided are a lighting device, a backlighting device, and a display device that comprise a radiation source such as LED and wavelength converting members comprising phosphors. In one embodiment, self-absorption within the devices is suppressed or reduced by placing a selective reflector between two wavelength converting members, and the wavelength converting member emitting light with longer peak wavelength is substantially isolated from the irradiation of another wavelength converting member emitting light with shorter peak wavelength. In other embodiments, the wavelength converting members are arranged in strip configuration; or in adjacent hexagons configuration.

The present invention provides an energy delivery device for use with a medical treatment system for the more efficacious treatment of patients during laser surgery. An energy delivery device comprises an optical fiber and a memory device having data programmed therein. The data is specifically associated with the energy self-absorption properties of the optical fiber. This data may include a calibration parameter indicative of a self-heating characteristic of the optical fiber. The optical fiber and the memory device are operatively connected to the energy delivery device during use of the medical treatment system. The calibration parameter stored within the memory device is used by a main processor to calculate a corrected temperature value from a measured temperature at the treatment site. Thereafter, the power level of the energy generator is automatically adjusted in response to the corrected temperature value to assure that the proper energy is delivered to the human tissue through the light-diffusing section of the optical fiber. The power level is either increased or decreased to the correct power level setting for the desired temperature based on the calibration parameter.

The invention discloses a self-absorption air type cyclone foaming device for dust removal of coal mine. The device mainly comprises a foaming liquid supply pipe, a jet flow nozzle, an air suction mixing barrel body and a foaming barrel body, wherein the foaming liquid supply pipe is connected with the jet flow nozzle; an air suction chamber, an air and liquid mixing chamber and a diffusion foaming chamber are sequentially arranged inside the air suction mixing barrel body; the jet flow nozzle is connected to the air suction chamber; an air suction hole is formed in the air suction chamber; and a cyclone foaming chamber and a foam flow-out chamber are sequentially arranged inside the foaming barrel body. Foaming liquid with set pressure is sprayed at high speed through the jet flow nozzle to form turbulent jet flow; under the suction of the turbulent jet flow, air in the environment can automatically enter the air suction chamber through the air suction hole and is brought into the air and liquid mixing chamber from the air suction chamber to perform energy transmission and mass transmission; the accelerated and compressed air is crushed into air bubbles by liquid drops in the diffusion foaming chamber; and the preliminarily foamed flow is fully foamed in the cyclone foaming chamber. The self-absorption air type cyclone foaming device is simple in structure, convenient to operate, high in foaming rate, low in energy consumption, safe, reliable and low in running and maintenance cost.

The invention discloses a dye auto-polymerized thin film random laser. The dye auto-polymerized thin film random laser comprises external pump light and a thin film sample, wherein the thin film sample consists of a glass negative and a PDMS thin film; the glass negative and the PDMS thin film together form a leakage waveguide structure; and the PDMS thin film contains an auto-aggregated dye micro-nano crystal which is formed by auto aggregation of PM597 dye molecules. The invention furthermore discloses a preparation method of the dye auto-polymerized thin film random laser. According to the dye auto-polymerized thin film random laser, the low-concentration dye molecules are low in energy of self-absorption loss, so that the threshold value of the random laser is reduced and then the energy loss of the pump light is reduced; the solubility of the dye molecules change and the dye molecules aggregate to form the micro-nano crystal which serves as a scattering medium and a gain medium in a random laser outgoing process, so that the preparation method of the random laser is simplified; and the thin film random laser is low in threshold value and simple in preparation process.

The invention provides a working system of an electrically controlled natural gas engine. A natural gas supply system comprises a natural gas storage tank, a switch electromagnetic valve and a pressure reducing valve which are connected in turn, and a natural gas introducing device introduces natural gas into a gas intake manifold; the natural gas introducing device is an electronic adjusting valve or an ejector and is controlled by an ECU; the ECU comprises a natural gas introducing control program, an ignition control program and an idle speed control program; in addition, a gas storage tank with function of stabilizing pressure is arranged between the pressure reducing valve and the ejector, so that the natural gas engine and an electronic control system thereof run more stably; the control of the natural gas introducing amount is achieved through the control of output pulse width; a self-absorption system has the advantages of stable performance and lower cost, and is comparatively suitable for refit of old gasoline engines and diesel engines; and a direct injection type system has the advantages of good performance, good acceleration performance and high efficiency, and can meet higher discharge normative requirement.

We introduce a new technology for Manufacturable, High Power Density, High Volume Utilization Nuclear Batteries. Betavoltaic batteries are an excellent choice for battery applications which require long life, high power density, or the ability to operate in harsh environments. In order to optimize the performance of betavoltaic batteries for these applications or any other application, it is desirable to maximize the efficiency of beta particle energy conversion into power, while at the same time increasing the power density of an overall device. The small (submicron) thickness of the active volume of both the isotope layer and the semiconductor device is due to the short absorption length of beta electrons. The absorption length determines the self absorption of the beta particles in the radioisotope layer as well as the range, or travel distance, of the betas in the semiconductor converter which is typically a semiconductor device comprising at least one PN junction. Various devices and methods to solve the current industry problems and limitations are presented here.

The invention discloses a self-sucking swirl pneumatic atomizing nozzle device relating to a fuel atomizing evaporation mixing nozzle used for a full-automatic combustion engine and belongs to the field of industrial combustion systems. An atomizing sheet 2, a swirl sheet 3 and a stream guidance sheet 4 are compressed closely by a compression nut 1 and a fixing piece 5; the atomizing sheet 2 is an internal cone and the outlet of the atomizing sheet 2 is a spout 14; the swirl sheet 3 is provided with a tangential air hole 11; the outlet hole of the stream guidance sheet 4 is an oil hole 12 and the outlet of the stream guidance sheet 4 is a swirl chamber; the compression nut 1 is connected with the fixing piece 5 and a connecting piece 7; the outer surface of the upstream of the fixing piece 5 is provided with a seal ring 6; an oil inlet hole 8 is the inner hole of the connecting piece 7; an air inlet hole 9 is the connection hole of the connecting piece 7 along the radical and coaxial direction; compared with the existing centrifugal nozzle or pneumatic atomizing nozzle, the self-sucking swirl pneumatic atomizing nozzle device does not need an oil pump; has the advantages of improving the fuel atomizing evaporation mixing characteristic and the distribution uniformity of oil-gas space, improving the combustion performance, reducing contamination discharge, having no coking and plugging, and is an ideal nozzle for combusting the heavy oil and waste oil by the full-automatic combustion engine.

The invention provides a simulation system and simulation method of hydrocarbon generation, adsorption and desorption of shale. The simulation system comprises a shale gas self-generation device, a shale gas self-absorption device and a shale gas yield counting device which are connected in sequence. The shale gas self-generation device is used for simulating the hydrocarbon generating process of shale, the shale gas self-absorption device is used for simulating the adsorption and desorption processes of hydrocarbon gas, and the shale gas yield counting device is used for counting simulation parameters of the hydrocarbon gas released by desorption of the shale gas self-absorption device. The simulation system further comprises a control device connected with the shale gas self-generation device, the shale gas self-absorption device and the shale gas yield counting device. The control device is used for controlling the work pressure and temperature of the shale gas self-generation device to simulate the hydrocarbon generating process under different temperatures and pressures, controlling the work pressure and temperature of the shale gas self-absorption device to simulate the adsorption and desorption processes of the hydrocarbon gas under different temperatures and pressures, and controlling the shale gas yield counting device to count the simulation parameters of the hydrocarbon gas released by the shale gas self-absorption device. The simulation system can effectively, quickly and conveniently guide shale gas exploration and development practice.

We introduce a new technology for Manufactureable, High Power Density, High Volume Utilization Nuclear Batteries. Betavoltaic batteries are an excellent choice for battery applications which require long life, high power density, or the ability to operate in harsh environments. In order to optimize the performance of betavoltaic batteries for these applications or any other application, it is desirable to maximize the efficiency of beta particle energy conversion into power, while at the same time increasing the power density of an overall device. The small (submicron) thickness of the active volume of both the isotope layer and the semiconductor device is due to the short absorption length of beta electrons. The absorption length determines the self absorption of the beta particles in the radioisotope layer as well as the range, or travel distance, of the betas in the semiconductor converter which is typically a semiconductor device comprising at least one PN junction. Various devices and methods to solve the current industry problems and limitations are presented here.

The invention relates to a powder liquid mixer, comprising a shell (1) which is provided with a powder inlet (11), a liquid inlet (12) and a mixture material output channel (13), wherein, the mixture material output channel (13) has a funnel typed shrink mouth (14); and the internal part of the shell (1) is provided with a powder transmission pipe (2); the terminal mouth of a top (21) of the powder transmission pipe (2) is communicated with the powder inlet (11); a terminal mouth of a lower terminal (22) is positioned near the region of the shrink mouth (14) and is communicated with the mixture material output channel (13); a clearance exists between the outer lateral wall of bottom terminal (22) of the powder transmission pipe (2) and the inner lateral wall of the shrink mouth (14). Compared with the prior art, the powder liquid mixer of the invention utilizes the negative pressure formed by the flow of the liquid to produce the self-absorption dynamic to the powder, thus ensuring that the transmission of powder in the powder transmission channel expeditely. The transmission of the liquid and powder expeditely ensures the powder liquid mixer to keep the continuous working state with light maintenance working load.

The invention provides a doped semiconductor nanocrystalline quantum dot having a core-shell structure and a preparation method thereof. The quantum dot comprises a nanocrystalline core doped with Mn and a shell layer; the composition of the nanocrystalline core is MnzZn[1-z]SexS[1-x], and the composition of the shell layer is ZnSeyS[1-y], wherein x is greater than 0 or less than or equal to 1, y is greater than or equal to 0 and less than 1 and z is greater than 0 or less than or equal to 0.5; the dimension of the nanocrystalline core is 2-15 nm, and the dimension of the shell layer is 2-15 nm; the emission wavelength of the nanocrystalline quantum dot ranges from 590 to 630 nm. The fluorescence emission wavelength of the quantum dots is continuously adjustable in the range from 590 to 630 nm; as a result, the quantum dots cover the shortage of non-cadmium-doped nanocrystalline in emission wavelength, and have high fluorescence and quantum efficiency, as well as good air, temperature and optical stability; the quantum dots are good in absorption in blue and purple zones and have no self-absorption within other visible light wavelengths; the quantum dots contain no toxic metal and can be widely applied to the fields such as solid-stable lighting, solar cell, biological-medical detection and the like.

The invention discloses a coal quality on-line detecting method based on a dominating factor and combined with a partial least squares (PLS) method, which comprises the following steps of: firstly considering the self-absorption effect by using the intensity of spectral lines of a group of calibration coal samples; building a relation formula of elements to be tested and corresponding characteristic spectral lines thereof through the least squares method; then considering the mutual interference effect of the elements and modifying residual errors by using the intensity of the spectral lines of the other elements; and finally modifying the residual errors obtained in the last two steps through the PLS method, wherein the finally obtained formula improves the disadvantages of incapability of processing non-linearity effect and poor prediction accuracy of the PLS to a certain extent through combining the traditional fixed-quantity method of LIBS (Laser-induced Breakdown Spectroscopy) and the PLS. The method can explain the fixed-quantity information of element concentration by using the main characteristic spectral lines and can introduce a non-linearity form, thereby modifying the residual errors caused by calibration curve fitting by using a large amount of information in the spectral lines and avoiding the introduction of excessive noise signals, and reducing the influence on maternal effect at the same time so as to achieve the higher measurement accuracy.

The invention discloses an electric tail gate ECU device and control method based on CAN bus. The device comprises a central processing unit, and the device further comprises a CAN bus processing unit, a jackstay motor control unit, a self-absorption motor control unit, an obstacle detection unit, a locking detection unit, a tail gate signal detection unit, a keying unit and an alarm unit. The method comprises the step of controlling a tail gate to be opened and closed according to vehicle state information, tail gate ascending and descending environment information, tail gate locking state information and tail gate open-closed state information. According to the electric tail gate ECU device and control method based on the CAN bus, by obtaining vehicle CAN bus information and utilizing various sensors for judging the vehicle state, the tail gate is controlled to be opened, closed and locked automatically according to the vehicle state, so that the vehicle tail gate is opened and closed in a safe and reliable mode, more humanization and intelligentization are achieved, use by a user is facilitated, user experience is improved, and good economic and social benefits are achieved. The device can be widely applied to automated control systems of various vehicle tail gates.

The invention discloses a method for correcting plasma emission spectral line self-absorption effect. Based on an internal reference line, the intensity of the plasma emission spectral line after correction is obtained through calculating spectral line self-absorption correction coefficient. The specific steps are: 1) one plasma emission spectral line with self-absorption correction coefficient of one in the plasma emission spectral lines of elements to be analyzed is selected as the internal reference line; 2) the plasma temperature T of the elements to be analyzed is calculated; 3) the spectral line self-absorption correction coefficient of an analytical line is calculated through a self-absorption correction coefficient calculation formula; 4) the intensity of the spectral line of the analytical line is corrected according to the self-absorption correction coefficient of the analytical line; and 5) the steps are repeated, the intensity of the spectral line is cyclically corrected, the corrected intensity of the plasma emission spectral line is finally obtained when the self-absorption correction coefficient of the analytical line reaches the preset accuracy, and the correction of the self-absorption effect is completed. By adopting the method, the invention has the advantages that the plasma temperature is calculated more accurately and the quantitative analysis of the material compositions is conducted more accurately.

The exploration and development of unconventional oil-gas reservoirs, especially the dense gas-oil reservoir, has become a bright spot of the oil exploration and development in recent years and a mainbattlefield of the future oil exploration and development. The wettability is one of important parameters for knowing dense oil-gas reservoir characteristics, and an operation of effectively determining the rock wettability has important significance for researching recovery percent of the oil reservoir, an oil-water ratio after water channeling, recovery ratio improvement and residual oil saturation. The invention discloses a new method for dense rock wettability determination, the disadvantages that the traditional self-absorption metering is inaccurate and nuclear magnetic resonance oil-water signals are hard to distinguish are overcome, a nuclear magnetic signal of the water is shielded by effectively utilizing manganese chloride, the self-water-absorbing oil discharge amount, water-driving oil amount, self-oil-absorbing water discharge amount and oil-driving water amount are accurately acquired by combining T2 spectral curve of the rock and weighing and weight change characteristics thereof, and the effective determination of the dense rock wettability is realized. The new method disclosed by the invention has the advantages of being small in current personal factor influence, high in data reliability, and simple and convenient.

The invention provides a packaging process for an LED with a fluorescent glue film and an LED packaging, which comprises that an atomizing device is used for coating a flip-chip surface on which silica gel is already molded with the atomized fluorescent glue, the fluorescent glue is evenly adhered to the molded silica gel surface under the action of the gravity after airflows, and a novel fluorescent glue film structure is formed after being baked and cured at a high temperature. The packaging process does not change the optical property of an LED structure, effectively improves reliability and heat dissipation of the LED structure, reduces self-absorption of phosphor powder, and simultaneously, the structure can be adjusted by being coated repeatedly, so that the color temperature can be adjusted, the produced LED color temperature is concentrated, the cost is greatly reduced, the LED packaging is a simple and practical illuminating light source and is beneficial to popularization of LED lights.

The invention provides a silica gel lens, a fabrication method of the silica gel lens and an LED (light-emitting diode) light emitting device comprising the silica gel lens. The silica gel lens comprises a quantum dot macromolecule dispersion, fluorescent powder and silica gel with a mass ratio of 1:(3-7):(40-50), wherein mass content percentage of quantum dot materials in the quantum dot macromolecule dispersion is 0.01-10%. As the quantum dot materials have the characteristics of a wide excitation spectrum and continuous distribution of the spectrum, and light emitting wavelengths of quantum dots can be controlled by adjusting the particle diameter, the quantum dot materials with the different particle diameters can be selected according to design requirements; and as the spectrum half peak widths of the quantum dot materials are smaller, and the quantum dot materials have no self-absorption characteristics or low self-absorption characteristics, the light emitting efficiency and light emitting quality can be better improved, and a light emitting effect of the silica gel lens can be effectively improved.

The invention discloses a method for vibration absorption and noise reduction of steel rails by self-attraction type combined magnetic damping sheets, which comprises the following steps: a rail web and a rail foot of a steel rail (1) are symmetrically provided with the combined magnetic damping sheets (2); the outer layers of the combined magnetic damping sheets are symmetrically provided with constraint metal plates (3) which are fixed at both sides of the steel rail by a U-shaped magazine clip (4); the combined magnetic damping sheets have the magnetism and are attracted on the side surfaces of the steel rail; related interfaces inside the combined magnetic damping sheets and between the combined magnetic damping sheets and the steel rail as well as between the combined magnetic damping sheets and the constraint metal plates can cause vibration friction and slide relatively during the vibration of the steel rail; the mechanical energy of the vibration is converted into thermal energy to be dissipated to eliminate the vibration energy or the vibration amplitude of the steel rail; and the combined magnetic damping sheets and the steel rail are not adhered, so the viscoelastic damping mechanism is lost, which ensures that the range of the vibration frequency is wider, the temperature change has smaller influence, and good vibration absorption and noise reduction effects exist in a wider range of frequency domain and temperature domain. The method has convenient installation and replacement, and obvious vibration absorption and noise reduction effects, and can be widely used for vibration absorption and noise reduction engineering of track traffic.

The invention relates to a regenerative and integrative hydrogen sulfide liquid phase oxidation absorption method of sulphur separation / desulfuration solution, comprising a regeneration-separation tower composed of a bubbling reaction section, an air liquid separation section and a foam collection section. Desulfuration solution used for absorbing H2S flows out of a self-absorption tower and enters into the regeneration-separation tower, and then is oxidized and regenerated by a catalyst at the bubbling reaction section so as to enrich sulphur granules on a bubble interface; at the air liquidseparation section, the regeneration / desulfuration solution is separated from foams and is returned to an absorption tower for recycling, and sulphur is carried to the foam collection section by foams and is recovered by collecting foams; 0.008-0.012g of surfactant is added when per desulfuration solution containing 1g of sulphur enters into the tower; air dose introduced in the desulfuration solution containing 1g of sulphur is no less than 34L, and empty tower gas velocity is 0.8-2.5cm / s; and the sulphur granule separation rate and regenerative reaction rate are high, the energy consumptionand catalyst consumption are low, and the method can be applicable to the process of absorbing H2S gas in medium-size sulphur throughputs.

An object of the present invention is to provide a light-emitting apparatus reduced in the optical self-absorption of the light-emitting device and assured of excellent light extraction efficiency. The inventive light-emitting apparatus comprises a substrate, a semiconductor light-emitting device provided on the substrate with or without intervention of a submount, and an encapsulating structure for encapsulating the semiconductor light-emitting device, wherein the encapsulating structure has a bottom parallel to the bottom of the semiconductor light-emitting device and the side surface of the encapsulating structure is tilted with respect to the bottom.

The invention discloses a Cu-doped Type-II core-shell structure white light quantum dot material and a preparation method thereof, which belong to the technical field of semiconductor nanometer material preparation. The core in a quantum dot structure is a Cu-doped CdS quantum dot, the core is coated with a ZnSe quantum wall to form a type-II core-shell structure which is then coated with a broad-band gap ZnS passivation protective layer, and the final quantum dot is a Cu:CdS / ZnSe / ZnS structure. The quantum dot material has continuous spectrum white light, large Stokes shift, a low self-absorption factor, high fluorescence quantum efficiency and a high color rendering index; the distribution of light colors in space is uniform; different chromaticity coordinates and color temperature can be adjusted by means of adjusting the size of the inner core CdS, the thickness of the water outer ZnSe and the doping concentration of Cu. The quantum dot material does not have light color distortion within a certain temperature range; besides, the quantum dot still has excellent light stability after being excited for a long time by blue light.

The present invention discloses a novel fluorescent probe capable of specifically recognizing cysteine, wherein the molecular structure formula is defined in the specification. According to the present invention, the fluorescent probe can distinguish the mercapto-containing cysteine from the mercapto-free amino acid region, can distinguish the cysteine from the homocystine and the glutathione having the similar structure, emits red light during cysteine detection, can reduce the background interference and the damage of light on tissue cells in biological applications, exhibits great Stokes shift, can reduce self-absorption so as to improve the sensitivity, can be used for the fluorescence sensing analysis of the cysteine in environments or biological samples, and has advantages of good selectivity to cysteine, high sensitivity, strong interference resistance, and good application prospect.

The invention relates to water-soluble near infrared luminescent quinoline squaraine dye, of which the molecular structural general formula is shown on the figure. The method for preparing the water-soluble near infrared luminescent quinoline squaraine dye comprises that: firstly, 2-methylquinoline is subjected to bromination, sulfonation, nitration and acylation and reacts with acetonitrile and iodo-acid or iodo-ester to generate quinoline quaternary ammonium salt; and secondly, the quinoline quaternary ammonium salt is mixed with squaric acid, and the mixture is subjected to azeotropic distillation and dehydration, vacuum distillation and silica gel column chromatography and recrystallization through ethanol to obtain the water-soluble quinoline squaraine dye. The dye is applied in the fields of development of novel medicines, fluorescence labeling, probes, biological immunoassay, biological immunodetection and the like. The fluorescence-emission wavelength of the water-soluble quinoline squaraine dye is near infrared, so that the water-soluble quinoline squaraine dye has superior penetrability on environments and biological tissues and reduces self absorption and background absorption, and the sensitivity of fluorescence analysis can reach 10<-10> mol / L. The preparation method is simple and easy, has low cost and good economic benefit and is suitable for industrialized production.

The invention discloses a double-pulse laser induced breakdown spectroscopy-based method applied to detection of heavy metals and microelements in crops. The method comprises the following steps: sequentially sending two paths of lasers with different axes by a double-pulse solid laser under the control of a delay generator, enabling one path of laser to climb along a light path and to vertically impact the surface of a sample so as to stimulate generation of plasma, and enabling the other path of laser to directly impact the plasma; collecting characteristic spectral lines; choosing four spectral lines free of self absorption, self inversion and with highest strength from the characteristic spectral lines according to to-be-detected heavy metals and microelements; building a plurality of multi-element regression models by taking a sample reference value as output and taking the strength of the spectral lines as input, choosing four optimal models, and building a comprehensive model by taking prediction results of the four models as input and taking the sample reference value as output; and inputting the obtained strength of the four spectral lines into the comprehensive model on account of to-be-detected fresh plant leaves, and calculating the content of the heavy metals and the microelements.

The invention discloses a device and method for detection efficiency calibration of a xenon sample HPGe. The device comprises a radioactive source, a plurality of polyethylene boxes and a detector, wherein the polyethylene boxes are different in height and contain air samples. The radioactive source comprises a 133Ba surface source and a 137Cs point source. A surface area aluminum substrate is used as an upper absorption layer. The 137Cs point source is located in the central position on the upper surface of the 133Ba surface source. The 133Ba surface source is located above the polyethylene boxes containing the air samples. The upper surface and the lower surface of each polyethylene box are used as lower absorption layers. The detector comprises a crystal, an aluminum outer shell and a carbon material window, wherein the aluminum outer shell is located outside the crystal, and the carbon material window is located on the aluminum outer shell and located above the crystal. The polyethylene boxes are placed above the window of the detector. According to the device and method for detection efficiency calibration of the xenon sample HPGe, the height of the adopted radioactive source is increased in an evenly-spaced mode, the 133Ba surface source is used for replacing a 133Xe sample to conduct efficiency calibration, the peak efficiency of the 137Cs point source is used for correcting correction factors conforming to the addition of the peak efficiency of the 133Ba surface source, and the technical problems that an existing detection efficiency calibration method is quite high in requirement for activity of the source, the self-absorption problem exists in rays, and larger uncertainty exists are solved.

The invention relates to a self-absorption tail gate lock body assembly. The self-absorption tail gate lock body assembly comprises a tail gate lock body and a tail gate lock driving module, wherein one end of the tail gate lock driving module is connected with a self-absorption rocker arm of the tail gate lock body through a stay cable; a wire harness is arranged at the other end of the tail gate lock driving module; the tail gate lock driving module comprises a fixed bottom plate; a lower cover plate is arranged on the fixed bottom plate; an upper cover plate is arranged on the lower cover plate; a rack, a second-stage transmission gear, a first-stage transmission gear and a motor are sequentially arranged at the inner part of the lower cover plate from left to right; the first-stage transmission gear consists of an upper pinion A and a lower turbine; the turbine is meshed with a worm; the second-stage transmission gear consists of an upper large gear B and a lower pinion B; the pinion A is meshed with the large gear B; the pinion B is meshed with the tooth part of the rack; a switch A and a switch B are sequentially arranged between the motor and the rear wall of the lower cover plate from right to left; and the contact point of the switch A and the contact point of the switch B are both arranged downwards. The self-absorption tail gate lock body assembly disclosed by the invention is reasonable in structure and good in safety, and has multiple functions.

The invention discloses a device and a method for restraining a self-absorption effect of a laser induced breakdown spectrometry by utilizing microwave-assisted stimulation. The device comprises a pulse laser, a convergent lens, a spectrograph, a photoelectric detector, a computer, a three-dimensional displacement platform, a microwave probe and a microwave generator. The invention utilizes the excellent penetrability of the microwave-assisted stimulation to simultaneously stimulate the base particles of almost all the elements in plasma, avoid the self-absorption for central similar emission spectra, restrain and eliminate the self-absorption effect of the plasma from the source, so as to promote the accuracy and precision of laser induced breakdown spectrometry quantitative analysis. According to the invention, microwave is adopted for assisting the laser induced breakdown spectrometry, the microwave energy is radiated to laser plasma through a probe near field, no sealing chamber is required, a sample loading process is simple and the advantages of quick, in situ, real-time, multi-element and remote analysis of the laser induced breakdown spectrometry under atmospheric environment are remained.

The invention discloses a method for evaluating shale oil reservoir water self-absorption oil-displacement effect and oil-displacement time. The method comprises preparing simulated experimental formation water having a formation water mineralization degree, placing rock cores in saturated hydrogen nucleus-free fluorocarbon oil, detecting nuclear magnetic resonance T2 spectrums, carrying out statistics on an area formed through the nuclear magnetic resonance T2 spectrum and an X axis, carrying out a water self-absorption oil-displacement test on the rock cores, respectively standing the rock cores for different time periods, detecting nuclear magnetic resonance T2 spectrums, carrying out statistics on an area formed through the nuclear magnetic resonance T2 spectrum and the X axis, drawing the nuclear magnetic resonance T2 spectrums of the rock cores stood for different time periods on the same graph, calculating the difference of the areas formed through the nuclear magnetic resonance T2 spectrums in different water self-absorption oil-displacement time periods and the X axis, and determining an increasing rate R of the area formed through the T2 spectrum and the X axis, wherein if R is less than 5%, the corresponding previous self-absorption time is the optimal water self-absorption oil-displacement time. The method can evaluate shale oil capillaceous water self-absorption oil-displacement effects through a nuclear magnetic resonance technology and determine the optimal water self-absorption oil-displacement time.