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92results about How to "Expand scope" patented technology

Method and System for High Speed Options Pricing

A high speed technique for options pricing in the financial industry is disclosed that can provide both high throughput and low latency. A parallel / pipelined architecture is disclosed for computing an implied volatility in connection with an option. Parallel / pipelined architectures are also disclosed for computing an option's theoretical fair price. Preferably these parallel / pipelined architectures are deployed in hardware, and more preferably reconfigurable logic such as Field Programmable Gate Arrays (FPGAs) to accelerate the options pricing operations relative to conventional software-based options pricing operations.
Owner:EXEGY INC

System and method for managing media contents

A system and method for managing media contents are disclosed. The system includes: a text classifier, adapted to classify subtitle information according to defined subjects, and obtain content clips of different subjects; and a media content marking unit, adapted to mark the time of playing each content clip of a different subject after contents are classified by the text classifier, obtain the content clips which have specific time information and different subjects, match the content clips with concepts in an ontology library, and mark the content clips through terms defined in the ontology library. Therefore, the media contents are described through standard terms, which is conducive to unification of the content description information and makes it possible to retrieve the media contents.
Owner:HUAWEI TECH CO LTD

Application of in-situ plasma measurements to performance and control of a plasma processing system

A system and method for managing a plasma system is described. In one embodiment the method includes measuring at least one aspect of a state of plasma in the plasma system so as to obtain plasma state data, receiving subsystem data, which is indicative of at least one subsystem of the plasma system and utilizing both the plasma state data and the subsystem data to manage the plasma system.
Owner:MAHONEY LEONARD J

Method and mechanism for debugging a series of related events within a computer system

The present invention provides a method and mechanism for debugging a series of related events within a computer system. According to an embodiment, when tracing a series of related events that span across a plurality of threads, a token may be passed from one thread to another, thereby allowing a link between the threads to be marked within the one or more traces. The token may be passed via a messaging API, such as a network layer API or a shared resource. With this aspect of the invention, sufficient information will be provided within the one or more traces to allow all the related trace data to be linked together.
Owner:ORACLE INT CORP

Method and device for laser shock forming on the basis of polyurethane rubber film

ActiveCN101524784APrecise large area impact formingPrecise and flexible levelingLaser beam welding apparatusShock waveStress conditions
The invention relates to a method and a device for laser shock forming on the basis of a polyurethane rubber film. The method is characterized in that shock waves induced by laser are used as a power source for forming; the polyurethane rubber film is used as a concave film for the laser shock forming; and the stress condition of a plate under the action of the shock waves is changed to achieve the shock forming of a complicated curved surface. The device comprises a laser generating device, a light guide system, a laser shock head, a polyurethane rubber film system and a control system and is also provided with a detection feedback system with a displacement measuring device. According to the requirement of the curved surface shape and forming rules of a plate, laser shock process parameters are optimized, the polyurethane rubber of proper hardness and thickness are selected, and the plate is deformed under the associative action of the shock waves and the polyurethane rubber. The device not only can achieve the complicated and precise forming of the plate, but also can carry out the flexible leveling of the plate, and also can be applied to the surface shock strengthening treatment of materials.
Owner:JIANGSU UNIV

Seed treatment with combinations of pyrethrins/pyrethroids and clothianidin

A method of preventing damage to the seed and / or shoots and foliage of a plant by a pest includes treating the seed from which the plant grows with a composition that includes a combination of clothianidin and at least one pyrethrin or synthetic pyrethroid. The treatment is applied to the unsown seed. In another embodiment, the seed is a transgenic seed having at least one heterologous gene encoding for the expression of a protein having pesticidal activity against a first pest and the composition has activity against at least one second pest. Treated seeds are also provided.
Owner:BASF CORP

Preparation method for copper oxide nano line array film

The invention belongs to low-dimensional nano material preparation and application field of nano technology, and particularly relates to a preparation method for a copper oxide nano line array film. The preparation method comprises the following steps: sputtering a metal copper film on an FTO substrate by adopting a magnetron sputter plating method, and then annealing the prepared film under air atmosphere, thus obtaining the copper oxide nano line array film. In the preparation method, the controllability is good, the preparation is flexible, the preparation method is not limited to prepare substrate materials, the scale production in the industry can be conducted conveniently, and the application field and scope of nano line array film can be expanded to a greater degree.
Owner:HENAN UNIVERSITY

Matrix-existing high-entropy alloy and preparation method thereof

ActiveCN108642399AExpand contentExpand scopeBreaking strengthHigh entropy alloys
The invention provides matrix-existing high-entropy alloy and a preparation method of the matrix-existing high-entropy alloy, and relates to the high-entropy alloy and the preparation method. The matrix-existing high-entropy alloy and the preparation method of the matrix-existing high-entropy alloy are designed to solve the problems that existing high-entropy alloy is poor in mechanical property,a large brittle intermetallic compound phase exists in the high-entropy alloy, and the plasticity is poor. The matrix-existing high-entropy alloy is formed by 50%-90% of alloy matrixes and 10%-50% ofalloying elements in a preparation mode according to the mass percentage. The method comprises the steps that firstly, raw materials are prepared; and secondly, the raw materials, weighed and taken inthe first step, of the matrix-existing high-entropy alloy are subjected to smelting by use of an electric arc smelting method or an induction smelting method, so that the matrix-existing high-entropyalloy is obtained. The yield strength of the prepared matrix-existing high-entropy alloy ranges from 1000MPa to 2000MPa, the breaking strength of the prepared matrix-existing high-entropy alloy ranges from 2000MPa to 4000MPa, the ultimate strain epsilon P (%) of the prepared matrix-existing high-entropy alloy ranges from 20% to 70%. The matrix-existing high-entropy alloy can be obtained.
Owner:HARBIN INST OF TECH

Supramolecular block copolymer compositions for sub-micron lithography

A polymeric composition and method of preparation for application in sub-micron lithography, comprising a blend of A-B and B′-C block, random, branched, or graft copolymers, where: (i) the B and B′ blocks or grafts have attractive supramolecular interactions characterized by a negative Flory-Huggins parameter; (ii) the composition exhibits a microphase-separated, three-domain morphology with A, C, and B / B′ domains comprised largely of A blocks or grafts, C blocks or grafts, and a mixture of B and B′ blocks or grafts, respectively. Long-range ordering of nanometer-scale domain features has been achieved in thin films of such supramolecular polymer blends, while avoiding macrophase separation. The strategy offers a diversity of morphologies for sub-micron lithographic applications in tandem with ease of chemical synthesis.
Owner:RGT UNIV OF CALIFORNIA

Character recognition system and method using spatial and structural feature extraction

InactiveUS7010166B2Less susceptible to effect of noiseIncrease capacityCharacter recognitionFeature vectorFeature extraction
A character recognition system and method implement a classification system according to which each character of a set of characters is identifiable at least partially on the basis of a set of character feature types indicative of the identity of the character, the set of character feature types including (i) bars; (ii) lakes and (iii) bays. A character image is algorithmically scanned in each direction of a predetermined set of scan directions in order to extract data relating to bars, lakes and / or bays. A feature vector is assembled based on the algorithmically extracted data and rendered accessible to character recognition apparatus. The character recognition apparatus is adapted to recognize a character corresponding to an assembled feature vector at least partially on the basis of the quantity of each of (i) bars; (ii) lakes and (iii) bays indicated in the feature vector and to provide an output identifying the recognized character.
Owner:LOCKHEED MARTIN CORP

Splitting twisting-boosting type vortex spinner

The invention belongs to the technical field of textile processing and relates to a splitting twisting-boosting type vortex spinner which is used for feeding fiber bundles into a vortex spinning area on a spinning machine in a splitting manner and boosts twisting for the fiber bundles in vortex spinning. The splitting twisting-boosting type vortex spinner is of a structure with a splitting feeding channel and a twisting-boosting device, a structure of a traditional vortex spinner with a single feeding channel and a single static spindle is improved, a vortex spinning mode of single-channel fiber feeding and static spindle pure vortex twisting of the traditional vortex spinner is changed, active holding type twisting is carried out for fiber bundles in the splitting channel, boosted twisting is carried out for fiber bundles guided in by the outer wall of a guide needle during vortex wrapping and winding, fiber control during vortex spinning is enhanced, requirement limit on number of fibers included in a fiber bundle and cohesive force during traditional vortex spinning is broken through, spinnable fiber variety and spinnable yarn count range of the vortex spinning technology are expanded. The splitting twisting-boosting type vortex spinner is reasonable in structure and convenient to use and operate.
Owner:WUHAN TEXTILE UNIV

Mesofluidic Reactor With Pulsing Ultrasound Frequency

A mesofluidic reactor performs a chemical reaction of a starting material. A liquid phase starting material is introduced into a spraying head equipped with an ultrasound generating piezoelectric crystal unit. An inert / reagent gas feeds into the spraying head, connected to a reactor tube arranged within a thermally insulated multi-zone heating unit. For solid phase, an inert / reagent gas is introduced into a solids container connected to a spraying head equipped with an ultrasound generating piezoelectric crystal unit. The spraying head connects to a reactor tube arranged within a thermally insulated multi-zone heating unit. In either case, a reactor tube outlet connects to a cooled product trap to collect conversed substances. The spraying head generates a particle size distribution with nano and micro sized particles for the liquid phase and nano, micro or larger particles for the solid phase. The inert / reagent gas is preheated over the piezoelectric crystal unit's surface.
Owner:COMINNEX ZRT

Media resource sharing system, method and server set based on Internet

The invention relates to a media resource sharing system, method and server set based on Internet. The system comprises at least one sharing terminal, at least one Internet terminal and a server set, wherein the sharing terminal is used for sending equipment information, IP addresses and media resource shared information to the server set through the Internet; the Internet terminal is used for receiving input geographical position information and media resource request information, sending the input geographical position information and the media resource request information to the server set and receiving feedback information of the server set; and the server set is used for receiving the information sent by the sharing terminal, associating and storing the received information, selecting the media resource shared information related to the geographical position information from the stored associated results according to the received geographical position information and media resource request information, and feeding the selected result back to the Internet terminal. According to the invention, the Internet terminal is enabled to check shared resources of other terminals in a network in a positioned manner, and the range of media resource sharing is enlarged.
Owner:深圳市云帆世纪科技有限公司

High-pressure cooling stage device for in-situ observation of particle size distribution of gas hydrate and application method

The invention discloses a high-pressure cooling stage device for in-situ observation of particle size distribution of a gas hydrate. The device cooperates with a laser particle size analyzer to finish measurement of the particle size and particle size distribution of a gas hydrate crystal in fluid; the device comprises a high-pressure resistant perspective bin, a high-pressure resistant reaction bin, a temperature control system, a pressure control system and a computer data acquisition system. The device disclosed by the invention is adopted as an accessory device of the laser particle size analyzer, the application and measurement condition range of an existing laser particle size analyzer is expanded, so that the device can measure the particle size and particle size distribution of solid-liquid two-phase fluid in a high-pressure and low-temperature environment. The measurement method is simple, and the measurement precision is far higher than that of similar experimental devices developed by other countries. The device disclosed by the invention plays an important guiding role in quantitatively analyzing the processes such as generation and decomposition of the gas hydrate and revealing related dynamics mechanism of the gas hydrate.
Owner:理化联科(北京)仪器科技有限公司

Halogen-free water-soluble flux with weak acidity and low corrosion

The invention discloses a halogen-free water-soluble flux with weak acidity and low corrosion, which comprises the following components in percentage by weight: 3 to 8 percent of organic acid and organic amine active agent, 0.5 to 2 percent of halogen-free surfactant, 1 to 15 percent of cosolvent, and the balance of deionized water. A preparation method comprises the following steps of: weighing the organic acid and organic amine active agent, the halogen-free surfactant and the cosolvent, putting the deionized water and the organic acid active agent into a stirring kettle, uniformly stirring, sequentially adding the cosolvent and the halogen-free surfactant in the stirring process, and uniformly stirring to obtain a finished product. Compared with the conventional water-soluble flux, the halogen-free water-soluble flux has the advantages that: 1, the flux has weak acidity and low corrosion, and small damage to welding equipment and appliances, improves production efficiency and reduces production cost; and 2, the flux does not contain halogens at all, so that a printed circuit board has high electric property, high reliability and long service life and meets the halogen-free requirement after being welded, and the application field and application range of the water-soluble flux are greatly expanded.
Owner:PERFECTION SCI & TECH DONGGUAN

Double-optical-comb multi-frequency-multiplication-factor frequency spectrum spread frequency modulation signal generation system and implementation method thereof

The invention provides a double-optical-comb multi-frequency-multiplication-factor frequency spectrum spread frequency modulation signal generation system and an implementation method thereof. A laserand a direct digital synthesizer provide optical carriers and linear frequency modulation signals for a frequency multiplication module. The frequency multiplication module realizes photoelectric conversion and frequency multiplication of electric signals, the optical frequency comb module generates five-line optical frequency combs. Five paths of optical signals are respectively injected into the five PDs connected in parallel for photoelectric detection, the obtained electric signals are subjected to frequency spectrum splicing, and 10 / 20 frequency multiplication linear frequency modulationsignal frequency spectrum expansion can be realized. According to the invention, the generation of high-frequency and large-bandwidth linear frequency modulation signals is effectively realized, andthe method has the characteristics of simple structure, frequency agility and small channel interference. Microwave photonics technology is adopted to fuse the multi-frequency multiplication technology and the optical frequency comb technology so that the range of the carrier frequency and the bandwidth of an original linear frequency modulation signal is expanded, and the requirements for the frequency and the bandwidth of the linear frequency modulation signal are remarkably reduced.
Owner:NORTHWESTERN POLYTECHNICAL UNIV

High-sulfur-content polymers for positive electrode of lithium-sulfur battery and preparation method of high-sulfur-content polymers

The invention relates to high-sulfur-content polymers for a positive electrode of a lithium-sulfur battery and a preparation method of the high-sulfur-content polymers. The preparation method comprises the following steps: adding elemental sulfur into a narrow-neck bottle or a beaker filled with a magnetic stirring bar; then heating the narrow-neck bottle or the beaker in a constant temperature oil-bathing pot until a clear orange melting phase is formed; adding thiophene diene monomers into melt sulfur; stirring an obtained mixture at the temperature of 185 to 205DEG C; after a reaction mixture is cooled to room temperature, moving out the magnetic stirring bar, and directly scrapping a product from the bottle. According to the polymers obtained by the method provided by the invention, active sulfur and organic molecules are connected by chemical bonds in a molecular structure; when the polymers are used for a positive electrode material of the lithium-sulfur battery, the dissolving of polysulfide in electrolyte is effectively inhibited, and the problem like greater volume expansion in an electrochemical reaction process of the elemental sulfur is avoided; meanwhile, when a conjugated structure connected by a plurality of thiophene rings is used as the positive electrode material, the transmission of electrons is facilitated, and a new material is provided for the positive electrode material of the lithium-sulfur battery.
Owner:TIANJIN UNIV

Auxiliary controller for an HVAC system and method of operation

An auxiliary controller for an HVAC system includes a thermostat interface for receiving control signals by wire from a thermostat; an HVAC system interface for providing control signals by wire to an HVAC system; a security system interface for receiving armed status signals by wire from a security system; and processing structure configured to, while the security system is disarmed, permit routing of all control signals received from a thermostat to an HVAC system and, upon arming of the security system, invoke a setback mode including controlling the routing to reduce energy consumption.
Owner:REMME RANDALL

Precision target system for near field target calibration of camera with large field of view and method

The invention discloses a precision target system for near field target calibration of a camera with a large field of view and a method. The precision target system comprises a base with a gantry frame, an X-axis motion mechanism, a Y-axis motion mechanism, a Z-axis motion mechanism, a target, a target surface, a turntable, a pitching table and a camera under test, and is characterized in that the X-axis motion mechanism, the Y-axis motion mechanism and the Z-axis motion mechanism are arranged on the base; the whole Z-axis is driven by an X-axis to move transversely; the target is fixed on the Z-axis to achieve vertical movement, and the target surface is mounted on the front of the target; the turntable is mounted on a Y-axis to achieve movement along the Y-direction; the pitching table is fixed on the table surface of the turntable; and the camera under test is fixed on the table surface of the pitching table. When the precision target system is in operation, an appropriate target surface is mounted, and the system is powered; the camera is enabled to directly faces the target surface by a certain distance through adjusting the components, then the turntable, the pitching table and the Y-axis are fixed; and the position of the target surface is adjusted through the X-axis and the Z-axis, and calibration for different fields of view of the camera under test is realized. The precision target system realizes near-field target calibration for a camera with two wavebands and various large fields of view through combining the small-size precision target and the multi-axis precision numerical control system, and improves the target calibration efficiency.
Owner:西安应用光学研究所

Method for treating high boron content terrestrial heat tail water

The invention provides a method for treating high boron content terrestrial heat tail water. The terrestrial heat tail water first passes through a boron removal prefilter and a boron removal filter and then undergoes ceramic membrane ultra-filtration treatment and multistage reverse osmosis treatment. The prefilter is filled with a filtering medium formed by sintering activated carbon and diatomaceous earth, and the boron removal filter is filled with boron removal absorbent resin containing multivalent alcoholic groups and amino groups. The boron removal filter isolates a filter material by using a fiber filter screen, and the terrestrial heat tail water enters the prefilter and the filter low and comes out high. When the boron content of the terrestrial heat tail water is 100 mg / L, the boron removal rate is not lower than 99.6%, and the water quality of discharged water can respectively reach the waste water discharge standard and drinking water or farm irrigation water quality standard. The method for treating the high boron content terrestrial heat tail water is good in boron removal effect, reduces device investment cost and running cost and improves utilization level of terrestrial heat tail water resources.
Owner:CHINA PETROCHEMICAL CORP +2

Millesimal fine adjustment tool rest

InactiveCN101817096AIncreased accuracy rangeReduce process costGearingEngineeringCutter location
The invention discloses a millesimal fine adjustment tool rest, which is characterized in that the cutter locations at all directions of the tool rest have independent functions of adjustment and tool setting, the reading value precision per division is 0.0005mm, and the travel route is 0-8mm. The cutter locations rotate around a middle rotary mechanism together to change positions, thus being capable of being located on arbitrary angles. The interface in the middle of the tool rest is matched with a mechanical indexing mechanism and an electrodynamic type indexing mechanism of an ordinary universal lathe. A mechanical indexing mechanism of an ordinary universal lathe tool rest is installed in the interface to form a mechanical manual millesimal fine adjustment tool rest. An electrodynamic indexing mechanism is installed in the interface to form an electrodynamic indexing millesimal fine adjustment tool rest.
Owner:蔡德全

Grosvenorine-metal zinc complex and preparation method thereof

The invention provides a grosvenorine-zinc complex and a preparation method thereof. The grosvenorine-zinc complex is a complex of grosvenorine and Zn(II) ions and has a structure represented by a formula (I). The preparation method comprises the following steps: dissolving grosvenorine and salt of metal zinc into water, regulating a pH value by virtue of alkali, carrying out constant-temperaturestirring, and respectively carrying out nanofiltration, desalination, membrane concentration, crystallization, washing and drying, so as to obtain the grosvenorine-zinc complex. The metal complex is formed by the grosvenorine and metal microelement zinc beneficial to a human body, so that the modification range and application range of the grosvenorine are expanded. The complexing rate of the obtained metal zinc complex is over 84%, the biological utilization rate is high, and the metal zinc complex has excellent anti-tumor biological activity and particularly has selective inhibitory activities to melanoma cells and hepatoma cells.
Owner:HUNAN HUACHENG BIOTECH

2,7-bis(2,4-dimethoxyphenyl)diphenylmethylene fluorene, trimer compound and preparation method and application thereof

The invention discloses 2,7-bis(2,4-dimethoxyphenyl)diphenylmethylene fluorene, a trimer compound as well as a preparation method and application thereof. The 2,7-bis(2,4-dimethoxyphenyl)diphenyl methylene fluorene in an AIE material molecule is used for forming, through connection of methylene, a cyclic trimer blue light material molecule, wherein the tetraphenyl ethylene is a typical AIE molecule, and the performance and the application range of AIE can be greatly expanded by constructing the molecule containing the tetraphenyl ethylene skeleton. The monomer containing the tetraphenyl ethylene skeleton and the cyclic trimer can be used as AIE luminescent materials, the novel macrocyclic compound and the monomer have good AIE luminescent properties, and the emission wavelength of fluorescence is 373 nm. In addition, the material does not emit light in a benign solvent, a light emitting phenomenon can occur along with gradual addition of a benign solvent, when the benign solvent accounts for 70% of the total volume, the light emitting is strongest and is enhanced by nearly 1000 times, and the material belongs to a typical AIE material.
Owner:SHANGHAI UNIV

Preparation method of unsaturated polyester resin for wood modification

InactiveCN104693369AAvoid the problem of increased moisture contentEliminate cracksWood impregnation detailsReaction temperatureRoom temperature
The invention relates to a preparation method of an unsaturated polyester resin for wood modification. The method comprises the following steps: A, sequentially adding maleic anhydride, phthalic anhydride and 1,2-propylene glycol into a three-mouth flask; B, stirring and rising temperature, rising the temperature of a reaction system to be about 150+ / -5 DEG C, and keeping the reaction temperature for about 6 hours; C, reducing the temperature of the reaction system to be 110-120 DEG C, adding styrene, keeping the temperature to be 90+ / -5 DEG C, continuously stirring for 0.5-1 hour and fully mixing; D, cooling to reach the room temperature and discharging to complete the preparation of the unsaturated polyester resin. The preparation method has the advantages of simpleness, high operability, security, reliability and the like; after the wood is subjected to dipping modification, a new way and a new range of the wood are widened.
Owner:BEIJING FORESTRY UNIVERSITY

Word processing system with fault tolerance function and method

A work processing system with the fault tolerance function comprises an input module, a character fault tolerant table, a fault tolerance processing module, a word stock, a word search module, a distribution module and an output module, wherein, the input module is marked with a first character; the character fault tolerant table comprises a first character and a second character which is fault-tolerant of the first character; the fault tolerance processing module is used for finding out the second character which is fault-tolerant of the first character in the character fault tolerant table; the word stock is used for storing words; the word search module is used for finding out the words formed by the second character in the word stock; the distribution module is used for classifying the words; the output module is used for outputting the words which are found out; fault tolerant relations are set up between one or more first characters and one or more second characters. By adopting the fault-tolerant input technology, setting up the mutual fault tolerant relations between the input characters and the output characters and associating the fault tolerant relations with the position relations among the characters on the input module, correct output is not affected by mis-pressing other characters because of incaution in the process of inputting characters, thereby increasing the precision rate of character input. The invention also provides a use method adopting the system.
Owner:GUANGDONG GUOBI TECH

Experimental device and experimental method for cylindrical isentropic compression

The invention discloses an experimental device and an experimental method for cylindrical isentropic compression. The experimental device comprises a cylindrical implosion magnetic flux compression generator; the cylindrical implosion magnetic flux compression generator comprises a metal sleeve, wherein two fixed coils are symmetrically arranged on the outer side of the metal sleeve; an explosive ring is arranged between the two coils; a synchronous detonating network is arranged on the outer side of the explosive ring; a cylindrical isentropic compression target is arranged in a metal sleeve; a laser speed measurement probe is mounted in the cylindrical isentropic compression target. According to the experimental device and the experimental method, the method for measuring the compression degree of a material in prior art is changed by designing a novel cylindrical isentropic compression target; a complex flash photography device is not required; the technical difficulty of measurement is greatly reduced; the cost of equipment is also reduced; the laser speed measurement technology involved in the invention is the standard measurement technology in the compression scientific field at present; the technology is mature and reliable; the measurement precision can reach 1 to 2 percent; therefore, the precision of the measurement data is greatly improved.
Owner:INST OF FLUID PHYSICS CHINA ACAD OF ENG PHYSICS

System and method for testing performance of underwater non-dispersible slurry in water conservancy and hydropower engineering

PendingCN112198301AThe test plan is scientific and reasonableClose to engineering applicationFlow propertiesPreparing sample for investigationWater flowSlurry
The invention provides a system and a method for testing the performance of underwater non-dispersible slurry in water conservancy and hydropower engineering. The testing system comprises an upper opening type transparent water tank, a grouting funnel, a test beaker and a test mold, an overflow hole is formed in the upper portion of the transparent water tank, a stirrer and a heating element are arranged in the transparent water tank, and the grouting funnel is erected above the middle of the transparent water tank through a funnel support. The system can control the water temperature, the water flow state and the feeding and water inlet positions, and can simulate the field environment to test the underwater expansion degree, the underwater coagulation time and the underwater compressivestrength of underwater non-dispersed slurry and the suspended matter content and the pH value of a water body. According to the method, different test environments are customized in a personalized mode, the field working condition is simulated, the test scheme is scientific and reasonable, the dispersion resistance, the mixture performance and the mechanical performance of the underwater non-dispersible slurry are compared and analyzed through multiple quantitative indexes, and technical support is provided for scheme comparison and selection, true performance evaluation and the like of the underwater non-dispersible slurry.
Owner:CHANGJIANG RIVER SCI RES INST CHANGJIANG WATER RESOURCES COMMISSION

Method for adopting optical switch to eliminate dark noise drift of array spectrograph

A method for adopting an optical switch to eliminate dark noise drift of an array spectrograph relates to a method for eliminating dark noise drift in the optical field. According to the method, the optical switch is disposed at an optical inlet of the array spectrograph, a light turn-on signal and a light turn-off signal are respectively recorded through switching the optical switch, a difference value between the light turn-on signal and the light turn-off signal is calculated and is taken as a real spectrum response, and then a dark noise drift system error is eliminated. The spectrograph linearity and a dynamic response scope can also be expanded, measurement steps are simplified, random noise intensity can be reduced, the fatigue degree of a photosensitive element can be reduced, and the method is easy to popularize and use.
Owner:SHANGHAI OCEANHOOD OPTO ELECTRONICS TECH
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