401 results about "Self-absorption" patented technology

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 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.

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 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 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 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 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.