356 results about "Radiation damage" patented technology

The invention discloses a preparation method of an Mg / Al laminated material interface irradiation damage behavior analysis sample, which comprises the following steps: respectively calculating the incidence depths of Mg < + > with different energies in an Mg / Al laminated material by adopting SRI < M > software, and calculating the irradiation damage layer depth of incident ions with specific energy; performing ion beam cutting on the ion irradiation sample according to the SRI M calculation result; sequentially selecting ion beams with different beam sizes to thin the cut interface sample; by adjusting parameters such as the electrolytic polishing solution ratio, the polishing temperature, the polishing time and the polishing voltage, the optimal rapid polishing process parameters of the Mg / Al laminated material interface sample are explored; according to the method, by means of combination of SRI M software simulation, ion beam micro-nano scale processing, a differential thinning process, rapid polishing treatment and the like, preparation of the Mg / Al interface transmission electron microscope sample in the Mg / Al laminated material after ion irradiation can be effectively completed, and Mg / Al interface irradiation damage behavior analysis and rapid screening of the high-performance Mg / A laminated material are achieved.

The invention discloses an alloy high-temperature and high-pressure environment simulation method under radiation action based on molecular dynamics, which comprises the following steps: establishing a molecular structure framework of an alloy according to a crystal structure and a lattice constant of the alloy, and setting initial parameters to construct an initial simulation model; performing relaxation operation on the molecular structure model in a high-temperature and high-pressure environment; performing irradiation damage simulation on the relaxed model based on molecular dynamics, selecting a central atom as a primary off-site atom, and setting incident energy and incident direction of the primary off-site atom to simulate atom cascade collision; keeping the incident direction unchanged, and adjusting the incident energy of the primary off-site atoms to obtain defect distribution and defect density under different energies; and analyzing the defect evolution law of the alloy in the high-temperature and high-pressure environment according to the simulation result. According to the method, the alloy material is observed from a microscopic atomic scale, so that a powerful support is provided for simulating a defect evolution process in a high-temperature and high-pressure environment and reflecting atomic collision of the alloy in a real radiation environment.

The invention relates to the technical field of image processing, and discloses a plastic package material defect detection method and system in a radiation environment based on machine vision. The method comprises the following steps: acquiring an anti-radiation image in a gamma-ray environment through a lead-tungsten alloy shielding high-radiation tolerance type image sensor, and performing adaptive contrast enhancement. Defect features including microcracks, bubbles, deformation and chromatic aberration are extracted by using dual-tree complex wavelet transform and an HSV color space; and inputting the multi-dimensional features into an AR-DCNN network to carry out multi-task learning, identifying defect types and carrying out scoring. Based on Weibull distribution and a random forest algorithm, the radiation-resistant life of the plastic package material is predicted, and a material degradation curve and safety threshold early warning are obtained. According to the invention, standardized processing of the radiation damage quantitative index is realized, and the prediction accuracy is effectively improved.

Method for investigating at least one nano-scale biological sample (1), said method comprising a step a) (100) of preparing an embedding liquid (3) containing a plurality of nano-scale biological samples (1) wherein the nano-scale biological samples (1) have a maximum diameter MD wherein MD < = 30 nm, a step b) (200) of preparing a film (2) of the embedding liquid (3) on an electrically conductive substrate (4) in an application zone (22), the substrate (4) is wetted by the embedding liquid (3) in the application zone (22), and wherein the film (2) of the embedding liquid (3) has an average thickness AT, where AT < = 30 nm; step c) (300) adjusting the film (2) on the substrate (4) to a measurement temperature MT, wherein-100 DEG C < = MT < =-1 DEG C; step d) (400) measures at least one of the nanoscale biological samples (1) within the film (2) on the substrate (4) in an electron beam device (32) at a measurement temperature MT, where the at least one nanoscale biological sample (1) is exposed to an electron beam (41, 44). The present invention provides a method for studying nanoscale biological samples, wherein single nanoscale biological samples can be studied in a simple manner at high spatial resolution.

The utility model provides a sub-packaging protection box for medical isotopes and drugs thereof, which comprises a material front chamber, a sub-packaging main chamber and a packaging rear chamber, the packaging rear chamber is divided into an upper layer space and a lower layer space, the lower layer space comprises a lead tank automatic packaging cabin and a radioactive solid waste temporary storage cabin, a buffer chamber I is arranged between the material front chamber and the sub-packaging main chamber, and a buffer chamber II is arranged between the material front chamber and the sub-packaging main chamber. And a buffer chamber II is arranged between the sub-packaging main chamber and the upper-layer space of the packaging rear chamber. According to the split charging protection box provided by the utility model, each functional zone can keep a reasonable differential pressure gradient, and the split charging protection box has the functions of clean ventilation, sterilization and disinfection, on-line monitoring and the like, and meets the requirements of relevant laws and regulations such as GMP (Good Manufacturing Practice) in China on clean environment, on-line monitoring, data auditing and tracking and the like in the production process. And meanwhile, the automatic lead tank packaging and solid waste collecting and storing functions are achieved, operation convenience and safety are improved, and radiation damage to operators is reduced to the minimum.

The invention provides a rare earth silicon germanate scintillating material and a preparation method and application thereof, in particular to a rare earth silicon germanate scintillating material with high thermal stability and strong radiation resistance and a preparation method and application thereof, the general formula of the rare earth silicon germanate scintillating material with high thermal stability and strong radiation resistance is RE2 (1-x-delta / 2) Ce2xGedeltaSi (1-y + delta) Gey-deltaOz, in the formula, 0 lt; x is more than or equal to 0.05, y is more than or equal to 0.15 and less than or equal to 0.5, delta is more than or equal to 0 and less than or equal to 10 <-4 >, z is more than or equal to 4.95 and less than or equal to 5.05, RE represents a rare earth element, and the rare earth element is selected from at least one of lanthanum (La), lutetium (Lu), yttrium (Y) and gadolinium (Gd). The rare earth silicon germanate scintillating material provided by the invention has the characteristics of strong radiation damage resistance, high scintillation light output, low afterglow and the like while greatly improving the thermal stability, and can be used in occasions with extremely high requirements on the thermal stability or radiation resistance of the material, such as high-energy physical experiments, nuclear medicine imaging, oil exploration wells and the like.

The invention discloses an operation state detection method and device of a ventricular assist device and detection equipment, and belongs to the technical field of medical instruments. The ventricular assist device comprises a driving device and an interventional pump, the driving device is used for driving the interventional pump to operate, and the method comprises the following steps: acquiring current data of the driving device in a working state; under the condition that the current data indicates that the load of the driving device is increased, the operation state of the ventricular assist device is classified and identified according to the change condition of the current data in a first time period; and sending alarm information corresponding to an identification result, wherein the identification result indicates an abnormal operation state causing the load increase. According to the method, under the condition that medical radiography imaging equipment is not used, the reason for abnormal load increase is prompted in time, automatic identification of the abnormal operation state is achieved, the safety risk is reduced, the life safety of an auxiliary object is protected, and radiation damage to the human body when the medical radiography imaging equipment works is reduced.

The utility model discloses a sample preparation device for detecting the residual rate of the aluminum layer after punching a pit on an aluminum-plastic film, and belongs to the technical field of battery processing. The sample preparation device comprises: a sample table, a clamp, a bracket, a tool holder, a cutter and a magnifying glass. The clamp and the bracket are installed on the sample table, the tool holder and the magnifying glass are installed on the bracket, and the cutter is installed on the tool holder. The clamp is used to fix the aluminum-plastic film, and the cutter is arranged between the magnifying glass and the clamp. The tool holder is rotatably installed on the bracket so that the cutter can move toward the clamp. The utility model cuts the aluminum-plastic film at the position to be inspected by the cutter, and can quickly and effectively test the residual amount of the aluminum layer after punching a pit. The measurement accuracy is high and there is no radiation damage, which solves the problem that the prior art epoxy curing measurement method is time-consuming and labor-intensive and the success rate of sample preparation is low.

The invention relates to a molecular probe for targeting a prostate specific membrane antigen and application, and belongs to the technical field of nuclear medicine. The invention provides a molecular probe for targeting a prostate specific membrane antigen, and the molecular probe successfully obtains a PSMA targeting molecular probe by introducing iodobenzene butyric acid and a PEG4 group on the basis of a PSMA-617 molecular structure on the basis of a double-ligand covalent coupling technology. The molecular probe has the advantages that the residence time of the molecular probe in a tumor area is obviously prolonged, the treatment effect is improved, the requirement for radioactive dose is reduced, and radiation damage to surrounding normal tissues is reduced; the specificity is excellent, a tumor area with high PSMA expression can be accurately targeted, and tumors with different PSMA expression levels can be effectively distinguished; the speed of reaching a target tumor is high, and an ideal imaging effect can be realized only in 20 minutes. In conclusion, the molecular probe has great advantages in diagnosis and treatment of PSMA high-expression tumors, and has high specificity and high efficiency.

The utility model discloses a shielding plugging piece of a synchrotron radiation device beam line station wall outlet hole, which is characterized by comprising a square stepped hole embedded part used for being inserted into the synchrotron radiation device beam line station wall outlet hole, and a lead layer, a polyethylene layer, a lead layer and a polyethylene layer are sequentially filled in the square stepped hole embedded part along the beam direction; the lead layer comprises a plurality of lead bricks with different sizes, the polyethylene layer comprises a plurality of polyethylene bricks with different sizes, each layer of materials are arranged and stacked in a staggered joint manner, and gaps of adjacent layers of materials are not in the same straight line. According to the utility model, bremsstrahlung radiation outside the wall outlet hole at the inner side of the storage ring tunnel can be efficiently shielded, radiation in the storage ring tunnel reaching the downstream of a beam line station through the wall outlet hole is reduced, the radiation dose rate in a downstream experiment hall is further effectively reduced, and workers are prevented from being damaged by radiation.

According to the probiotic gel microspheres disclosed by the invention, probiotics are wrapped by the gel microspheres, so that the probiotics are protected from being absorbed or the influence of gastric acid and intestinal digestive juice is reduced, and the release of the probiotics in intestinal tracts is promoted. When the probiotics adopt functional coatings, after the probiotics gel microspheres reach the intestinal tract and release the probiotics, the coating layers on the surfaces of the probiotics can promote the probiotics to adhere to the intestinal mucosa, and the problem that traditional probiotics are difficult to colonize in the intestinal tract is solved. The probiotic gel microspheres disclosed by the invention have an obvious radiation injury protection effect after being orally taken, and can be used for relieving whole-body radiation injury or local radiation injury (such as radioactive intestinal injury) caused by whole-body radiation or local radiation (such as abdominal radiotherapy).

The invention discloses a single-bond polymer irradiation damage calculation method, device, equipment and medium, and relates to the technical field of polymer irradiation damage calculation, and the method comprises the following steps: determining the microscopic section type of gamma ray and single-bond polymer; the irradiation damage of the gamma ray to the single-bond polymer is equivalent to the action probability of the gamma ray to the covalent bond; according to the bond forming structure data of the different covalent bonds, the bond breaking probability of the gamma ray to the different covalent bonds is obtained; and obtaining the initial free radical concentration according to the total deposition energy and the bond breaking probabilities of different covalent bonds. According to the method, the action probability of gamma rays on extranuclear electrons of nuclide atoms forming covalent bonds in the single-bond polymer is established, distribution of irradiation damage of the gamma rays in the polymer on various covalent bonds can be calculated, and the probability of covalent bond breaking caused by the irradiation damage can be accurately calculated; and the quantitative relation between the free radical concentration and the material absorbed dose is obtained.

The invention discloses an electron beam spot intensity distribution characterization method based on a suspended nano film, and belongs to the technical field of micro-nano machining. In order to solve the problems of radiation damage, poor repeatability, introduction of additional scattering interference and the like in the application of an electron beam lithography machine in the prior art, a suspended nano film structure is mainly manufactured by adopting a standard microelectronic process based on a silicon wafer, and the intensity distribution of electron beam spots is represented through exposure and development. According to the method, on the basis of being compatible with the original electron beam lithography machine process environment, accurate characterization of the electron beam spots is achieved, back exposure is not needed, the process steps are simplified, and interference of electron scattering and edge sputtering is effectively avoided.

The invention relates to the technical field of radiology department, in particular to a medical image reconstruction method and system for radiology department, and the method comprises the following steps: S1, carrying out the collection and preprocessing of multi-modal data; s2, image initial reconstruction based on sparse representation and compressed sensing; s3, deep learning is carried out to enhance the image quality; s4, real-time reconstruction and image post-processing are carried out; through the multi-modal sensor fusion and deep learning enhancement technology, the resolution, contrast and definition of medical images are remarkably improved, artifacts and noise are reduced, more accurate and clearer diagnosis basis is provided for doctors, early-stage minimal lesions can be found, diagnosis accuracy is improved, and the diagnosis efficiency is improved. A low-dose X-ray detector and ultrasonic sensor fusion technology is introduced into CT imaging, so that the radiation dose of X-rays can be effectively reduced on the premise of ensuring the image quality, radiation injury to a patient due to frequent examination is reduced, and the medical safety is improved.

The invention discloses a radiation-damage-resistant microscopic imaging system of a thick X-ray scintillator, which is characterized by comprising the scintillator used for absorbing X-rays penetrating through a sample and converting the X-rays into visible light; the reflective microscope objective is used for amplifying and imaging the luminous pattern of the scintillator to obtain primary imaging information of the sample and focusing the primary imaging information to the light field imaging module through an imaging lens; the light field imaging module is used for extracting light field information from the primary imaging information by using a light field imaging method to obtain secondary imaging of the sample and inputting the secondary imaging into the data processing module; and the data processing module is used for extracting light field information from the secondary image, resolving the extracted light field information through a light field reconstruction algorithm, and reconstructing to obtain a high-resolution image of the sample. According to the invention, the problems of high-efficiency fluorescence conversion coefficient and high spatial resolution of the high-energy X-ray are solved, and the light conversion efficiency of the high-energy X-ray is improved.

The invention discloses a position precision compensation method for an irradiation-resistant absolute photoelectric encoder. The position precision compensation method mainly comprises a dual-sensing Kalman filtering method and a Double Deep Q-Network reinforcement learning method. The dual-sensing module of the photoelectric encoder can start the auxiliary sensor after the main sensor is damaged due to radiation damage, so that the overall radiation resistance of the encoder is improved. According to the method, position data obtained by the auxiliary sensor is used as parameters of a state estimation equation in the double-sensor Kalman filtering method and used for compensating position errors of the main sensor in radiation damage, and hyper-parameters in the Kalman filtering algorithm are optimized through the DDQN reinforcement learning method. According to the position precision compensation method for the radiation-resistant absolute photoelectric encoder, the radiation resistance of the absolute photoelectric encoder can be improved, precision reduction caused by radiation damage is compensated, and the problem of position loss occurring when a main sensor is switched to an auxiliary sensor is solved.

The present invention discloses an intelligent infrared radiation recognition method for the damage and failure state of coal and rock under load, belonging to the field of water-preserved mining and strata control. Using the infrared radiation monitoring technology of coal and rock, from the perspective of computer vision, first obtain the stress-strain and infrared radiation time series data during the damage and failure process of coal and rock under load, and establish an infrared radiation grayscale image classification data set for different progressive damage and failure stages based on the crack strain model method; build a convolutional neural network CNN classifier, input the prepared data set into the CNN model for training; finally, use the trained model for the intelligent recognition of the damage and failure stage of coal and rock under load. It realizes non-destructive and real-time intelligent monitoring and judgment of the damage and failure stage of coal and rock under load, and has certain practical significance for infrared radiation damage monitoring and early warning in mining engineering and geotechnical engineering.

The invention relates to a magnetic control intervention guide wire robot based on mobile ultrasonic imaging, a pushing module is used for driving a magnetic guide wire to move, the magnetic guide wire is provided with a magnetic structure, the magnetic structure can deflect under the magnetic effect of a magnetic driving module, and the magnetic driving module is not in contact with the magnetic guide wire in the process. The ultrasonic tracking module can move along with the top end of the magnetic guide wire, and synchronous scanning imaging is carried out on the moving path of the magnetic guide wire in the process, so that a real-time ultrasonic image is obtained. The control terminal receives synchronous scanning imaging signals in real time and is in signal connection with the pushing module, the magnetic driving module and the ultrasonic tracking module, so that the pushing module, the magnetic driving module and the ultrasonic tracking module can be controlled to work normally. Compared with the prior art, the magnetic control intervention guide wire robot based on mobile ultrasonic imaging can achieve the purposes that an instrument can obtain accurate three-dimensional real-time positioning and automatic navigation, and radiation damage is avoided.

The invention discloses a particle implantation system based on external mechanical arm needle withdrawal and a using method thereof.The particle implantation system comprises a radioactive source implantation machine, a needle withdrawal robot, a needle withdrawal device and an external device for guiding and / or clamping a puncture needle, and the radioactive source implantation machine is connected with the puncture needle through a conveying catheter; the radioactive source implanting machine can convey a radioactive source to the puncture needle along the conveying catheter so as to output the radioactive source from the front end of the puncture needle and implant the radioactive source into a target object, the needle withdrawing device comprises a base and a clamping mechanism, the clamping mechanism is used for clamping or hooking the puncture needle, and the needle withdrawing robot realizes the movement of the needle withdrawing device in at least three degrees of freedom in the space. And the needle pulling robot drives the needle pulling device to move in the axial direction of the puncture needle, so that the puncture needle is pulled out by a target distance. The needle withdrawing precision of the puncture needle and the implantation effect of the particles in the radioactive particle implantation operation can be guaranteed, and radiation injury to doctors is reduced.

The invention relates to the field of medicines, in particular to application of schisandrin B in preparation of medicines for preventing or treating intestinal radiation injury. The invention finds the protective effect of the schisandrin B on the irradiated intestinal tract, and experiments prove that the schisandrin B can reduce the pathological injury degree of the irradiated intestinal tract, including increasing the villus length of the intestinal tract and the number of crypts, maintaining the stability of the intestinal mucosal barrier, reducing the inflammatory factor content of the intestinal tract tissue, and improving the intestinal tract tissue. The activity of the irradiated intestinal epithelial cells is recovered, and the apoptosis of the intestinal epithelial cells is inhibited. Meanwhile, schisandrin B can relieve ferroptosis caused by irradiation. Therefore, the schizandrin B has a wide application prospect in treatment of the radioactive intestinal injury and drug development as a potential radiation protective agent.

The invention relates to the technical field of biomedical materials, in particular to hydrogel as well as a preparation method and application thereof. The hydrogel is obtained by crosslinking a polymer framework material, a functional additive and a shielding agent, the polymer framework material comprises any one or more of gelatin, carboxymethyl chitosan, hyaluronic acid, chitosan, collagen, polyvinyl alcohol, sodium carboxymethyl cellulose and sodium alginate; the functional additive comprises any one or more of tannic acid, tea polyphenol, vitamin C and procyanidine; the shielding agent comprises any one or more of barium sulfate, bismuth simple substance and bismuth-containing compound. The hydrogel provided by the invention can effectively isolate radiotherapy rays, reduce oxidative stress reaction, provide a protective barrier for normal tissues in a radiotherapy process and reduce radiation damage, has excellent tissue repair promotion capability, is safe in components, fast in metabolism and adjustable in flowability and adhesion, and is more beneficial to adaptation in rectum or skin tissues.

The present application relates to the field of medicine, and particularly to the application of schisantherin B in the preparation of a medicine for preventing or treating radiation damage of the intestinal tract. The present application finds that schisantherin B has a protective effect on the intestinal tract after irradiation, and experiments prove that schisantherin B can reduce the pathological damage degree of the intestinal tract after irradiation, including increasing the length of intestinal villi and the number of crypts, maintaining the stability of the intestinal mucosal barrier, reducing the content of inflammatory factors in the intestinal tissue, restoring the activity of the intestinal epithelial cells after irradiation, and inhibiting the apoptosis. Meanwhile, schisantherin B can reduce the iron death caused by irradiation. Therefore, schisantherin B has a wide application prospect as a potential radiation protection agent in the treatment of radiation-induced intestinal injury and drug development.

The utility model provides an interactive experience teaching aid simulating a level gage for science popularization. The interactive experience teaching aid comprises an experiment container and a U-shaped pipe communicated with the bottom of the experiment container. The immersion liquid sensor is arranged on the side of the U-shaped pipe, and a sensing head of the immersion liquid sensor can be inserted into the U-shaped pipe; the simulated radioactive source and the simulated detector are detachably connected with the container support frame of the experimental container; the experiment container is communicated with a U-shaped pipe, so that the experiment container is flush with the liquid level of an inner cavity of the U-shaped pipe, when the amount of the injected liquid material reaches a threshold value set for science popularization demonstration teaching, an induction head of the immersion inductor makes contact with the liquid material in the inner cavity of the U-shaped pipe, and then the immersion inductor sends a signal to the simulated detector electrically connected with the immersion inductor. The buzzer and the light of the simulated detector flicker to remind an operator that injection of liquid materials is stopped when the threshold value set by teaching is reached, and the simulated radioactive source is only the same as a real radioactive source in appearance and does not have radioactivity, so that radiation damage to the operator is avoided.

The application discloses an online proton imaging ion spectrometer diagnosis system, relates to the fields of plasma physics and nuclear detection, and comprises an online proton imaging module, an online Thomson ion spectrometer module and a shielding aiming module; the shielding aiming module comprises a shielding cavity and an aiming laser pen; the online proton imaging module comprises a metal filter, a first scintillator and two proton imaging acquisition assemblies; the proton imaging acquisition assembly comprises a first optical fiber panel attached to the first scintillator and a first CMOS sensor attached to the first optical fiber panel; the online Thomson ion spectrometer module comprises an ion beam deflection mechanism and an ion spectrum diagnosis acquisition assembly; the ion spectrum diagnosis acquisition assembly comprises a light-proof aluminum film, a second scintillator, a second optical fiber panel and a second CMOS sensor which are sequentially and superposedly arranged. The application reduces the size of the whole system, can simultaneously carry out online proton imaging and ion energy spectrum diagnosis, and can effectively prevent radiation damage to the CMOS chip.

The invention discloses application of ellagic acid in preparation of a medicine or a biological product for preventing or relieving ultraviolet radiation damage and aging, and belongs to the technical field of biological medicine and radiation protection. Experimental verification shows that ellagic acid with effective concentration can promote expression of antioxidant related genes, reduce expression of inflammation response genes and expression of apoptosis related genes, eliminate active oxygen and inhibit lipid peroxidation reaction, so that oxidative damage, inflammatory reaction and apoptosis caused by ultraviolet radiation are effectively relieved, and the anti-inflammatory effect of ellagic acid is improved. The stress tolerance of an organism is improved, and the aging health risk induced by ultraviolet radiation is relieved; the medicine or biological product can be applied before and / or after exposure of ultraviolet radiation, and is suitable for preventing or relieving oxidative damage and cell aging caused by ultraviolet radiation. The invention provides a new way for developing safe and effective ultraviolet radiation protection and anti-aging preparations.

The invention relates to an evaluation method and system for a non-metallic material irradiation damage effect. The evaluation method comprises the following steps: constructing a geometric model according to material attributes of the non-metallic material, wherein the material attributes comprise chemical bonds; performing a simulation irradiation test on the geometric model by using a preset irradiation simulation environment and a preset irradiation physical model; calculating the bond breaking probability of the chemical bond according to the energy deposition information in the simulated irradiation test process; and obtaining the damage index of the non-metallic material according to the bond breaking probability. The evaluation efficiency and accuracy of the irradiation damage effect of the non-metallic material in the complex irradiation environment can be improved.

The application discloses a method, device and equipment for detecting the operation state of a ventricular assist device, and belongs to the technical field of medical instruments. The ventricular assist device comprises a driving device and an intervention pump. The driving device is used for driving the intervention pump to operate. The method comprises the following steps: acquiring current data of the driving device in a working state; in the case that the current data indicates that the load of the driving device is increased, performing operation state classification identification on the ventricular assist device according to the change condition of the current data in a first time period; and issuing alarm information corresponding to an identification result, wherein the identification result indicates an abnormal operation state causing the load increase. The method can timely prompt the cause of the abnormal load increase without the aid of a medical contrast imaging device, realizes automatic identification of the abnormal operation state, reduces the safety risk and protects the life safety of an assisted object, and reduces the radiation damage to the human body when the medical contrast imaging device is working.

The invention discloses application of a gold cluster fluorescent probe in detection of hematopoietic stem cells of radiation-damaged animals, and belongs to the technical field of nano-drugs. In order to solve the technical problem that in the prior art, accurate detection of radiation-damaged animal hematopoietic stem cells is difficult, the invention provides application of a gold cluster fluorescent probe in detection of radiation-damaged animal hematopoietic stem cells, a gold cluster fluorescent molecule is composed of an Au atom, other metal atoms M and an outer ligand L, coupling the gold cluster fluorescent molecule with an antibody through a chemical cross-linking method to prepare a gold cluster fluorescent probe coupled with the antibody; the gold cluster fluorescent probe shows good biocompatibility, relatively strong photobleaching resistance, good light stability, high sensitivity and high specificity, has the targeting characteristic of hematopoietic stem cells, can be applied to detection and monitoring of hematopoietic stem cells in vivo, and can be applied to detection and monitoring of hematopoietic stem cells in vivo. And detecting the residual volume of the hematopoietic stem cells after radiation injury and evaluating the injury condition.

The method comprises the following steps: locally heating the inner wall of an oil pipe by using an electromagnetic coil, and recording the temperature change of the inner wall of the oil pipe through a temperature probe at the position where the center of the electromagnetic coil clings to the wall of the oil pipe; the oil pipe casing pipe is filled with water, when the water in the oil sleeve annulus flows at different flows, the relation between the flow and the temperature change of the inner wall of the oil pipe is obtained, and instrument calibration is completed; measuring points are carefully selected, the oil pipe is heated, and the corresponding flow outside the pipe is obtained according to the obtained instrument scales. By measuring the flow velocity outside the oil pipe, personnel can be prevented from radiation injury during well logging, a method for measuring the flow velocity outside the pipe by using an isotope radioactivity method is completely eliminated, the well logging precision is improved, and the quality is improved.

The application provides a heterojunction bipolar transistor defect detection method, which comprises the following steps: acquiring a C-V curve and a 1 / C 2 -V curve of a heterojunction bipolar transistor at a preset voltage; determining the change of the C-V curve and the 1 / C 2 -V curve in a first preset voltage range; and controlling a C-V test module or an I-V test module of deep level transient spectroscopy to detect defects of the heterojunction bipolar transistor according to the change. The heterojunction bipolar transistor defect detection method has the beneficial effects that the different test modules of deep level transient spectroscopy can detect the defect types and defect states of the heterojunction bipolar transistor, and the internal defect properties and radiation damage mechanisms of the heterojunction bipolar transistor can be analyzed in depth.