74 results about "Dangerous substance" patented technology

The invention discloses an intelligent identification method for a prohibited goods based on an X-ray security inspection machine image. The method comprises steps: a data set for training is built; aunified prohibited goods identification model is trained, wherein the unified prohibited goods identification model comprises a shape classification model and a color classification model; the shapeclassification model is used to detect a to-be-detected image to output a shape detection result; the detection result is calculated and is inputted to the color classification model, and a color detection result is outputted; by using the shape detection result and the color detection result, the possibility of existence of a dangerous substance and the position are calculated; the model capableof detecting a dangerous substance and the to-be-detected image are compared, and the kind of the dangerous substance is marked and outputted. Intelligent machine identification replaces manual dangerous substance identification, the manual cost is saved, and the profit maximization is realized.

The invention discloses a rapid three-dimensional track planning method of an unmanned aerial vehicle taking into account complex environment constraints. The rapid three-dimensional track planning method of the unmanned aerial vehicle taking into account the complex environment constraints comprises the steps that firstly, a three-dimensional track planning environment model is constructed by analyzing various constraint information of typical complex environments such as topography, meteorology, no-fly zones and dangerous substances on an unmanned aerial vehicle track, and then a multilayerexpansion A* algorithm is designed to perform three-dimensional expansion according to the performance constraints and flight characteristics of the unmanned aerial vehicle so as to search and obtaina reference track of the unmanned aerial vehicle; and finally, the reference track is simplified and optimized in line simplification and line smoothing modes to obtain an optimal flight track for theunmanned aerial vehicle. The unmanned aerial vehicle track can be efficiently and accurately generated, threats can be safely avoided, and the speed and accuracy of track planning are increased.

The present invention relates to methods of sanitizing structures, buildings, passenger occupiable vehicles, and other enclosed or enclosable spaces. More particularly, the present invention relates to a method for killing and/or removing pests and their allergens, bacteria, viruses, fungi, molds, volatile organic compounds and other dangerous substances, from such objects or enclosures.

The invention belongs to the technical field of dangerous substance detection and particularly relates to a detection system for trace substance explosives. According to the technical scheme, the detection system for IMS (Ion Mobility Spectrometry) explosives comprises a sampling device (1), a gas inlet heater (2), an outer recycle gas channel (30), an inner recycle gas channel (40), a sensor (50), a power module (6), an amplifier (7), a single-chip microcomputer control system (8), a high-pressure module (9) and a drift tube (10). According to an ion separation technology provided by the invention, sample molecules can generate corresponding product ions under the action of an ionization source in the drift tube (10); the product ions are decelerated due to the acceleration of an electric field and the collision of neutral atmospheric molecules to obtain constant average speeds; the charge-mass ratios, space geometrical configuration and collision cross sections of the different product ions are different, so that the obtained average speeds are also different, and the product ions are separated after passing through a section of electric field and can reach a collecting electrode successively so as to complete the whole detection process.

The invention relates to a tester for measuring the degassing rate of a dangerous chemical under the condition of meeting water. A nitrogen steel bottle is connected with a first pressure reducing valve, an electromagnetic valve and a pressure sensor in turn through a pipeline; the tail end of the pipeline is communicated with a first neck of a three-neck flat-bottomed flask of a reaction flask; an infusion pump is connected in a second neck of the three-neck flat-bottomed flask of the reaction flask through a pipeline and is connected with a liquid storage bottle; the electromagnetic valve is connected in a third neck of the three-neck flat-bottomed flask of the reaction flask through a pipeline; a second electromagnetic valve is connected with a gas purifying device; the gas purifying device is connected with a gas flow meter; the gas flow meter is connected with a catalytic combustion gas sensor; and a computer control terminal is connected with the pressure sensor, the infusion pump and the gas flow meter. The tester realizes automatic data acquisition and processing operation, quickly identifies the inflammability of gas released by a dangerous substance through reaction with the water through the catalytic combustion gas sensor, provides safety information for processing the gas produced in the experiment process, and assists in classifying and identifying the danger of a substance which can release inflammable gas when the substance meets to react with the water.

The automatic automobile bottom scanning system includes a controller, an automatic camera, an automobile bottom scanning instrument and a computer. The controller connected to the automatic camera, the automobile bottom scanning instrument and the computer completes power source providing, enciphering, signal receiving and other functions; the automatic camera connected to the controller takes the photographs of automobile number plates; the automobile bottom scanning instrument connected to the controller scans the automobile bottom automatically and transmits video signal to the computer; and the computer with special program creates, shows and stores the real-time image of automobile bottoms. The present invention is used in checking automobiles in running to find out carried dangerous substance.

The invention relates to a method for utilizing an ink-jet printing technology to simply and quickly prepare a photonic crystal composite membrane with ultrafast responsiveness and patterning. The method for utilizing the ink-jet printing technology to prepare the photonic crystal composite membrane with responsiveness and patterning utilizes mixed liquor of monodisperse emusion particles, a monomer of a responsiveness function polymer, a cross-linking agent, an initiator, a high boiling point addictive and water as ink, the ink-jet printing technology is used for acquiring the photonic crystal composite membrane which is a patterning composed of microdroplet units, and the photonic crystal composite membrane is in response to humidity, to temperature, to acid gas, and/or to alkaline gas. The microdroplet units are piled up by frameworks of the monodisperse emulsion particles, and a responsiveness cross-linking polymer acquired by the monomer of the responsiveness function polymer through cross-linking polymerization is filled in gaps of the frameworks of the monodisperse emulsion particles. The photonic crystal composite membrane can not only achieve visual detection by distinguishing color change through naked eyes of people, but also have wide application prospect in quick intelligent display unit caused by external environment change, dangerous substance detection, chemical reaction monitoring, photoswitch, integrated optical circuit, and the like.

A terminal system has a mass spectrometric for inspecting of dangerous substances is installed in an inspection area, and a support system for determining whether or not a dangerous substance is present and identifying the type of the substance, based on the mass spectrometric data on the target element that has been measured by the mass spectrometric, is installed in a security service enterprise's office. Both systems are connected to each other via a communication network so that they can exchange information. Thus, the support system can send the determination result of dangerous substances and a precautions guide to the terminal system via the communication network.

The invention relates to the field of chemistry and chemical engineering, in particular to a decontaminant for radioactive contamination on the metal surface and a using method of the decontaminant. The decontaminant is characterized in that the decontaminant is an equal-volume mixture of an oxidizing agent and a complexing agent; the oxidizing agent is an aqueous solution containing 5-10% of Cl<-1> and 5-10% of ClO<-1>, the complexing agent is a series of aqueous solutions of inorganic negative ion water-soluble compounds, wherein the series of aqueous solutions and positive ions such as Fe<+2,3>, Ni<+2>, Cr<+2,3> and Co<+2,3> form water-soluble complexes in the aqueous solutions. The using method comprises a mist spraying method, a wiping method and a soaking method. The decontaminant for the radioactive contamination on the metal surface and the using method of the decontaminant have the advantages that the etching decontamination speed is moderate, and the etching reaction speed, the etching depth and the like are controllable; the decontaminant is especially suitable for efficiently removing radioactive contaminants on the inner surface of a closed system, and the content of decontamination factors is high; and according to the using method, in the decontamination process, NO2 and acid mist which pollute the environment and corrode other equipment are not generated, dangerous substances such as explosive gas H2 are not generated, waste liquid generated in the decontamination process is treated properly, and secondary waste which cannot be treated by a nuclear facilitywaste treatment facility is not generated.

The invention discloses a water production and supply industry environment risk source evaluating method, which comprises the following steps: (1) selecting water production and supply industry environment risk factors including dangerous substance environmental risks, equipment and facility environmental risks and enterprise environment management risks, and computing to determine the risk value of each risk factor; (2) directly adding the risk values of the risk factors to obtain the risk value of risk sources, wherein the computing model is I=M+F+G; (3) grading the risk sources according to the risk values of the risk sources as required, and correspondingly managing the different risk grades. According to the method disclosed by the invention, dangerous substances and dangerous devices in an enterprise representing the risk levels and enterprise environment management risk level information are mainly extracted, M, F and G are used as independent variables in environment risk evaluation to establish an evaluation function, and the method has the advantages of strong adaptability, dynamic change and high accuracy.

A method and apparatus for obtaining the leakage damage radius of a liquid ammonia storage tank is provided by the embodiments of the invention. The method includes judging whether a cloud formed by leakage of the liquid ammonia storage tank is a heavy gas cloud or not based on the leakage flash amount of the liquid ammonia storage tank, and determining whether the leakage damage radius of the liquid ammonia storage tank is a heavy gas cloud; the corresponding damage radius being obtained based on the judgment result of whether the cloud formed by the leakage of the liquid ammonia storage tankis a heavy gas cloud. According to the method and apparatus for obtaining a leakage damage radius of a liquid ammonia storage tank provided by an embodiment of that present invention, by setting to determine whether the cloud formed by the leakage of the liquid ammonia storage tank is a heavy gas cloud, and based on the judgment results, the corresponding damage radius can be obtained, which cancombine the diffusion of heavy gas cloud and non-heavy gas cloud organically, so that the diffusion process of dangerous substances becomes a continuous change process, and the damage radius of leakage concentration diffusion of liquid ammonia storage tank can be accurately obtained.

The invention belongs to the field of environmental risk assessment and particularly relates to an evaluation method of risk levels of dangerous substances of a mining industry. The evaluation method of the risk levels of the dangerous substances of the mining industry is characterized by firstly utilizing a dangerous substance risk level function, an ore bed safety degree function, a tailing pond safety risk level function and a corporate environmental management risk level function to compute a substance risk numerical value M, an ore bed safety risk numerical value K, a tailing pond safety risk numerical value W, and a corporate environmental management risk numerical value G, and then substituting the numerical value M, the numerical value K, the numerical value W and the numerical value G into a mining industry environment total risk level function for computation to obtain a mining industry environment total risk level rating numerical value I. The evaluation method of the risk levels of the dangerous substances of the mining industry achieves quantitative computation of the evaluation of risk sources of mining industry environments, standardization and scientization of the evaluation can be obtained and the evaluation results are reliable.

A method for storing ecologically dangerous substances underground and an apparatus for accomplishing the method. These substances can be radioactive waste, spent fuel elements, nuclear warheads, weapons-grade uranium and plutonium, in all forms, as well as chemical weapons and many other toxic substances, including biologically dangerous substances. Also, this invention can be used for storing many other, specific storage objects, preferably particularly valuable metals, minerals and jewelry produced from same, as well as valuable papers, banknotes, archive contents and historical documents which are to be stored for a long time, etc. Storage takes place in a storage site having deep underground boreholes, by a special gas-hydrodynamic system and by remote control of all the necessary deep loading and unloading operations without using conventional mechanical loading and unloading devices such as shaft elevators, lifts and the like which substantially restrict the range of application of underground storage sites. Unauthorized access to the storage objects is excluded and nuclear and radiation safety is guaranteed in the storage of, for example, radioactive waste, spent fuel elements and also weapons-grade uranium and plutonium, as well as the safety of stocks of chemical weapons and/or their dangerous components as well as of many other toxic substances, and the fire safety of the underground storage zone and storage costs are reduced.

An apparatus for detecting a chemical agent, capable of increasing a detection speed of a chemical agent, decreasing a false alarm rate, pinning down the kind of a chemical agent, and meeting specifications for unattended continuous monitoring equipment suitable for detecting sarin or soman. This detection apparatus comprises a sample introduction unit for introducing a sample, an ionizing unit for positively ionizing the sample from the sample introduction unit, a mass spectrometer unit for analyzing ions of the sample, and a computer for analyzing data, and is best suited for identifying a dangerous substance by detecting signals peculiar to chemical agents, such as sarin or soman.

The invention discloses a preparation method of an efficient wax removal and deoxidation integrated cleaning agent for copper polishing pieces. The method comprises the following steps: 1) oleic acidand triethanolamine are mixed according to a mass ratio of 1: 1, and are heated and stirred at a constant temperature for full reaction to obtain triethanolamine oleate; and 2) triethanolamine oleate,isomeric oleic soap, isopropanolamide, sodium gluconate, organic amine fat, EDTA, alkyl Polyglucosides, 2A1, sodium hydroxide, benzotriazole and pure water are mixed and fully stirred uniformly to obtain the cleaning agent. In the cleaning agent prepared by the preparation method of the cleaning agent, on one hand, wax and oxide layers on the surfaces of copper polishing piece products can be removed through one cleaning procedure, so that the use process is convenient and fast, the cleaning efficiency is improved, and the production cost is reduced; and on the other hand, the cleaning agentcontains no dangerous substances of strong acid and the like, so that the surfaces of the products cannot be damaged, and higher environmental protection and safety are achieved.

The invention discloses an evaluation method for analyzing and evaluating the risk of substances in products. The method comprises the following steps: first, collecting substance information, and building a substance database; secondly, building a regulation database according to data regulation and standard information; thirdly, collecting substance toxicity information, and building a substance toxicity database; and finally, making analysis and judgment according to requirements and sequence, analyzing products and components which fail to meet the requirements of regulations and contain toxic substances, and giving a risk description and preventive measures. An evaluation system comprises a substance database, a regulation and standard database, a data analysis system, a product risk and prevention module, and a substance toxicity database. Possible punishment due to compliance, such as product recall and notification, is reduced. Reliable evidence can be provided for the efforts made by enterprises in management and control, and the degree of punishment can be reduced. Possible harm caused by dangerous substances and toxic substances in products or components can be prevented. Through scientific and reasonable prevention explanation, various harms are minimized.

The invention belongs to the technical field of organic synthesis, and especially relates to a method for synthesizing ethyl 4-chloro-2-methylthiopyrimidine-5-carboxylate. The method comprises the following steps: an intermediate is prepared through cyclization of diethyl ethoxymethylenemalonate and S-methylisothiourea sulfate with sodium oxide as an alkali and ethanol-water as a reaction solvent;and the ethyl 4-chloro-2-methylthiopyrimidine-5-carboxylate is synthesized from the intermediate with toluene as a solvent and thionyl chloride and phosphorous oxychloride as a chlorinating reagent.A mixed solution of ethanol and water is used as the reaction solvent to ensure the solubility of the raw materials and make the sodium hydroxide completely dissolved, so the proceeding of the cyclization reaction is benefited, and dangerous substances such as butyl lithium are avoided, thereby the cost of the reaction raw materials is reduced, and the productivity is greatly increased; toluene used as the reaction solvent greatly reduces the use amount of the chlorinating reagent, so the reaction safety is greatly improved, the cost is reduced, and the post-treatment operation is simplified;and the thionyl chloride and phosphorus oxychloride are used as the mixed chlorinating reagent, so the yield of the reaction is greatly increased.

The invention discloses a method and equipment for simultaneously inspecting a plurality of liquid substances by using dual-energy computed tomography (CT). The method comprises the following steps of: performing dual-energy CT scanning on inspected liquid substances at a plurality of positions to acquire dual-energy CT protection data; performing CT reconstruction according to the projection data to acquire the CT images for representing physical attribute values of the inspected liquid substances; rotating the CT images of the inspected liquid substances after performing the dual-energy CT scanning at each position so as to align the images formed by multiple times of scanning operation; extracting the physical attribute values of the inspected liquid substances according to the CT images; and judging whether the inspected liquid substances are dangerous substances based on the physical attribute values. By the method, the liquid substances can be inspected rapidly.

The present invention relates to a child-proof closure for a container containing a dangerous substance comprising a body adapted to be fitted over a container with a top portion and a continuous side wall depending downwardly from the top portion. The closure comprises a series of interlocking elements on the top portion and the side wall that move in a predetermined sequence to facilitate access to the substance. The interlocking elements are slides adapted to slide within corresponding grooves. The closure further comprises a membrane underneath the top portion comprising an opening provided for limited distribution of the substance. The opening is accessible only after the interlocking elements are in the open position. The closure comprises two vertical slides that interlock opposite sides of a horizontal slide. The horizontal slide moves left and right and the vertical slides move down. The horizontal slide controls access to the container's contents