71 results about "Spatial stability" patented technology

The present invention provides computer-assisted methods and apparatus for identifying, selecting and characterizing biomolecules in a biological sample. A two-dimensional array is generated by separating biomolecules present in a complex mixture. A computer-readable profile is constructed representing the identity and relative abundance of a plurality of biomolecules detected by imaging the two dimensional array. Computer-mediated comparison of profiles from multiple samples permits automated identification of subsets of biomolecules that satisfy pre-ordained criteria. Identified biomolecules can be automatically isolated from the two dimensional array by a robotic device in accordance with computer-generated instructions. A supported gel suitable for electrophoresis is provided that is bonded to a solid support such that the gel has two-dimensional spatial stability and the solid support is substantially non-interfering with respect to detection of a label, such as a fluorescent label, associated with one or more biomolecules in the gel.

A system for quantifying surface characteristics detects and quantifies characteristics of a surface of an object. For example, the system may quantify changes in surface roughness without contacting the specimen and without requiring precise temporal or spatial stability. The system may also quantify the evolution or progression of a particular characteristic of a surface, such as a defect, a slipband, a crack, a microcrack, a pit, a damage feature, corrosion, a contour change, an impact crater, a change in residual stress, and so on. The system may include an energy source, a detector section, and a process section. The energy source transmits a source signal to the surface of the object. The source signal is specularly reflected and / or scattered by the surface to yield one or more received signals. The detector section receives the received signal and, in turn, provides a detector signal indicative of the received signal. The processor applies an algorithm to the detector signal to quantify an evolution in one or more characteristics of the surface.

A system for quantifying surface characteristics detects and quantifies characteristics of a surface of an object. For example, the system may quantify changes in surface roughness without contacting the specimen and without requiring precise temporal or spatial stability. The system may also quantify the evolution or progression of a particular characteristic of a surface, such as a defect, a slipband, a crack, a microcrack, a pit, a damage feature, corrosion, a contour change, an impact crater, a change in residual stress, and so on. The system may include an energy source, a detector section, and a process section. The energy source transmits a source signal to the surface of the object. The source signal is specularly reflected and / or scattered by the surface to yield one or more received signals. The detector section receives the received signal and, in turn, provides a detector signal indicative of the received signal. The processor applies an algorithm to the detector signal to quantify an evolution in one or more characteristics of the surface.

The invention relates to a nanoparticle and a preparation method thereof. Poly(lactide-glycolide acid) (PLGA) is in the center to serve as a core, phospholipid surrounds the surface of the PLGA core in monolayer and distearoyl phosphatidylethanolamine-polyethyleneglycol-carboxyl (DSPE-PEG-COOH) penetrates the monolayer phospholipid to serve as the shell. The phospholipid, the DSPE-PEG-COOH and the PLGA have good biocompatibility, can entrap hydrophobic drugs and control the drugs to release slowly in the human bodies. The phospholipid surrounds the surface of the PLGA, thus ensuring that the particle can avoid immune system recognition so that the circulating half life of the particle is lengthened. The PEG shell ensures the particle to have spatial stability, static stability, long circulation and other characteristics and to be not easily agglomerated. Meanwhile, carboxyl is easily crosslinked with such ligands as antibodies, peptide, probes and the like, thus ensuring the particle to have targeting characteristic. The preparation method of the nanoparticle is simple, convenient practical and is easy to operate and popularize.

The invention provides an acoustic optical modulator-based high-stability laser frequency scanning device. Laser passes through two coaxial diaphragms and is divided into two paths by a polarization beam splitter prism; one path of output passes through a quarter-wave plate, a No. 3 diaphragm and a No. 1 lens which are coaxial with one another, and enters a No. 1 acoustic optical modulator; diffraction-order laser light passes through a No. 4 diaphragm and a No. 2 lens which are coaxial with each other, and is reflected by a zero-degree high reflective mirror along an original path; the other path of output passes through two 45-degree planar reflecting mirrors and is regulated into parallel light through an optical fiber of which the two ends are matched with optical fiber matching heads, and the parallel light enters a No. 2 acoustic optical modulator through a No. 1 glass flat plate and a No. 3 lens in sequence; diffracted light enters a No. 2 glass flat plate through a No. 5 diaphragm and a No. 4 lens. By adopting the device, the spatial stability and power stability of laser light can be ensured at the same time.

The invention relates to a multilayered co-extruded low-temperature polyolefin crosslinked heat shrinking film and a preparation method thereof. The heat shrinking film is composed of films in an outer layer, a middle layer and an inner layer which are co-extruded and adhered, wherein the thickness of the heat shrinking film is 10-40[mu]m, and the thickness ratio of the outer layer to the middle layer to the inner layer is 1: (3-10): 1. The film is prepared by carrying out extrusion forming, radiative crosslinking, cooling, bidirectional synchro-drawing, air ring cooling and post treatment onraw materials. The film not only has the characteristics of a crosslinked product, but also keeps excellent sealing property and low-temperature shrinking property, has the special properties of puncture resistance, high-temperature resistance, friction resistance, slack resistance and the like of the crosslinked film, and keeps the heat sealing property and the spatial stability. The film can beapplied to high-temperature environmental stretching films and shrinking films, and meanwhile, has a low shrinking temperature and can meet the packaging demand on temperature sensitive packaging materials.

In a system and method for maintaining the spatial stability of a sound field a balance gain may be calculated for two or more microphone signals. The balance gain may be associated with a spatial image in the sound field. Signal values may be calculated for each of the microphone. The signal values may be signal estimates or signal gains calculated to improve a characteristic of the microphone signals. The differences between the signal values associated with each microphone signal may be limited although some difference between signal values may be allowable. One or more microphone signals are adjusted responsive to the two or more balance gains and the signal gains to maintain the spatial stability of the sound field. The adjustments of one or more microphone signals may include mixing of two or more microphone. The signal gains are applied to the two or more microphone signals.

The invention belongs to the technical field of flexible pendulous accelerometers, and particularly relates to a permanent magnet torquer based on a silicon-based coil for an inertial navigation accelerometer. The permanent magnet torquer for the accelerometer provided by the invention comprises a yoke, a permanent magnet, a magnetic conducting sheet and the silicon-based coil, wherein the yoke islocated at the most bottom, the permanent magnet is fixed on the yoke, and the magnetic conducting sheet is fixed on an upper surface of the permanent magnet. A permanent magnet air gap is formed between the yoke and the magnetic conducting sheet, the silicon-based coil is located in the permanent magnet air gap, and when the permanent magnet torquer is at work, the silicon-based coil is fixed onan accelerometer pendulum sheet through a coil cushion block. According to the permanent magnet torquer provided by the invention, an enameled wire wound coil of the permanent magnet torquer of the accelerometer is replaced by the silicon-based coil, thereby effectively reducing the thermal stress between the accelerometer pendulum sheet and the coil of the permanent magnet torquer, and meanwhilereducing the viscoelasticity of the coil. The silicon-based coil has better spatial stability in a permanent magnet magnetic circuit and can significantly improve the scale factor stability of the accelerometer.

The invention relates to a photo-induced polymer holographic material mixed with nano-silicon dioxide and a preparation method thereof. The photo-induced polymer holographic material comprises polyvinyl alcohol, acrylic amide, N,N'-methylenebisacrylamide, methylene blue, triethanol amine and nano-silicon dioxide. The preparation process comprises the following steps: firstly, adding the polyvinyl alcohol to deionized water and obtaining a polyvinyl alcohol solvent; secondly, dissolving the N,N'-methylenebisacrylamide in the deionized water, respectively adding nano-silicon dioxide granules and the acrylic amide and uniformly stirring; thirdly, adding the triethanol amine to the solvent obtained from the second step and fully stirring; fourthly, simultaneously adding the methylene blue and the mixed solvent prepared from the third step to the polyvinyl alcohol solvent and obtaining a photopolymer collosol; and fifthly, pouring the collosol on a glass substrate and obtaining a photopolymer dry film after the water is volatized. The materials simultaneously have great refractive index modulation degree and space stability, have the diffraction efficiency reaching 93 percent and are suitable for photo-holographic storage.

The invention discloses an optical fiber coupling-based CARS (Coherent Anti-Stokes Raman Scattering) beam space stability test control device and method. the system is composed of three parts of a CARS micro excitation source (100), a beam space stability detection device (200) and a beam feedback control system (300), wherein space beams outputted by the CARS micro excitation source (100) pass through the beam space stability detection device (200) to monitor the space state in real time, the space beams are adjusted through the beam feedback control system (300), and finally, the CARS microexcitation source 100 outputs beam space stability test and control. In comparison with the prior art, the space state of a pump beam remains stable when an adjustable space light delay line changes,the problem that a space light path needs to be adjusted frequently in a CARS micro imaging system to ensure space overlapping between the pump light and the Stokes light can be avoided, the operationprocess is simplified, and the detection efficiency is improved.

The invention discloses an amphipathy tri-block polypeptide ICG (Indocyanine Green) loaded micelle and a preparation method thereof. The amphipathy tri-block polypeptide ICG loaded micelle comprises a core, a middle layer and a shell, wherein the core is formed by polyleucine; the middle layer surrounds the core and is formed by polylysine; the shell is inserted into the middle layer and is formed by polyethylene glycol; and indocyanine green is dispersed in the core. By forming the core-shell structure to wrap the indocyanine green in polyethylene glycol-b-polylysine-b-polyleucine tri-block hybridized polypeptide, the indocyanine green is effectively prevented from being accumulated to decompose, so that the stability is enhanced. The prepared amphipathy tri-block polypeptide ICG loaded micelle has the characteristics of spatial stability, long circulation and the like, and has excellent fluorescence property, photothermal conversion capability as well as good passive targeting property, biocompatibility and degradability; optical imaging and photo-thermal treatment on tumor cells or tissues can be realized.

The invention provides an amido polymer filtrate loss reducer for water-based drilling fluid resistant to high temperature, salt and calcium and a preparation method and application thereof. The filtrate loss reducer is prepared from acrylamide, 2-acrylamido-2-methyl propanesulfonate, allyl polyethylene glycol and ammonium triethoxylallylbromide, wherein the molar ratio of the four monomers is (8.1-20.2):(9-15.2):(2.1-4.3):(8-10). The filtrate loss reducer can be effectively adsorbed on clay particles, meanwhile, hydration groups, namely sulfo groups and hydroxyl groups can bring an adsorbed hydration layer to the clay particles, steric stability of a disperse system is enhanced, the situation that fine particles aggregate to form dense mud cakes is effectively suppressed, and therefore the effect of filtrate loss reduction is achieved. Vander Waals force and electrostatic attraction exist between cationic quaternary ammonium groups and the clay particles with negative charges on surfaces, and therefore the filtrate loss reducer can be firmly adsorbed on the surfaces of the clay particles; steric hindrance generated by long side chains of polyoxyethylene groups can enhance the rigidity of main chains, and therefore the temperature resistance of a polymer is improved.

In a system and method for maintaining the spatial stability of a sound field a background noise estimate may be estimated for each of a first signal and a second signal. A first gain coefficient may be calculated responsive to the first audio signal and the background noise estimate of the first audio signal. A second gain coefficient may be calculated responsive to the second signal and the background noise estimate of the second signal. The gain coefficients may be calculated using one or more gain coefficient calculators. A common gain coefficient may be selected from one of the first gain coefficient and the second gain coefficient. The selected common gain coefficient may be one that results in a least amount of audio signal modification and may be applied to each of the first signal and the second signal.

In a system and method for maintaining the spatial stability of a sound field a balance gain may be calculated for two or more microphone signals. The balance gain may be associated with a spatial image in the sound field. Signal values may be calculated for each of the microphone. The signal values may be signal estimates or signal gains calculated to improve a characteristic of the microphone signals. The differences between the signal values associated with each microphone signal may be limited although some difference between signal values may be allowable. One or more microphone signals are adjusted responsive to the two or more balance gains and the signal gains to maintain the spatial stability of the sound field. The adjustments of one or more microphone signals may include mixing of two or more microphone. The signal gains are applied to the two or more microphone signals.

The invention discloses a method for preparing an alumina-ferric oxide ceramic membrane with controllable solar absorptance, relates to a method for preparing the alumina-ferric oxide ceramic membrane, and solves the problems that space stability, ultraviolet irradiation resistance and binding force are poor and the solar absorptance of a coating is difficult to adjust on a LY12 aluminium alloy surface with specific solar absorptance in the conventional method. The method comprises the following steps: 1, performing surface pretreatment and ultrasonic treatment on the LY12 aluminium alloy, and washing the LY12 aluminium alloy with distilled water and drying the LY12 aluminium alloy; 2, placing the dried LY12 aluminium alloy in a micro-arc oxidation electrolytic cell for electrolyzation to obtain a micro-arc oxidized LY12 aluminium alloy; and 3, placing the micro-arc oxidized LY12 aluminium alloy in the distilled water for hole sealing. The space stability and the binding force of the obtained ceramic membrane are good; the thickness of the membrane layer is controlled between 5 and 100 mu m and the ultraviolet irradiation resistance is good; and the solar absorptance can be controlled between 0.4 and 0.9.

The invention discloses a preparation method and an application of an anionic nonionic reactive emulsifier. The structural formula of the anionic nonionic reactive emulsifier is as shown in the specification, wherein in the formula, n is 5-40. Meanwhile, the invention further discloses a preparation method of the anionic nonionic reactive emulsifier and an application of the anionic nonionic reactive emulsifier in preparation of polymers. The anionic nonionic reactive emulsifier disclosed by the invention has high spatial stability, high emulsifying dispersion ability, low foam, low surface tension, wetting and other excellent performances, and can be used in emulsion polymerization, especially in styrene-acrylic emulsion polymerization, to prepare a high-performance emulsion with high stability, high luster and small particle size.

Automated parameter tuning techniques for cross-directional model predictive control for paper-making under user-specified parametric uncertainties to reduce variability of the actuator and measurement profiles in the spatial domain is proposed. Decoupling properties of the spatial and temporal frequency components permit separate controller design and parameter tuning. CD-MPC design that explicitly accounts for parametric model uncertainty while finding MPC cost function weighing matrices that prevent actuator picketing and guarantee robust stability of the spatial CD profile. Picketing refers to periodic variation patterns in the actuator array. The inventive technique includes: (i) determining the worst case cutoff frequency of all process models, given parametric uncertainty, (ii) designing a weighing matrix to penalize high frequency actuator variability based on the process model and worst case cutoff frequency, and (iii) finding a multiplier for the spatial frequency weighted actuator variability term in the MPC cost function that assures robust spatial stability.

The invention relates to a gate-type steel frame steel structure primary-secondary structure overall hoisting method. The gate-type steel frame steel structure primary-secondary structure overall hoisting method comprises the steps that 1, every two adjacent gate-type steel frame steel structures in the same span are spliced on the ground to serve as a roof overall hoisting unit, specifically, according to the steps in sequence, two steel beams are spliced, a plurality of purlines are connected and mounted between the two steel beams, a plurality of inter-purline supports and a plurality of inter-purline oblique supports are connected and mounted between every two adjacent purlines, and the spliced roof overall hoisting unit forms a structure with the unchanged geometry and space stability; 2, the roof overall hoisting unit is suspended and mounted on the roof supporting structure; and 3, the step 1 and the step 2 are repeatedly executed till a gate-type steel frame steel structure workshop is completely hoisted. By adopting the method that the two adjacent steel beams are spliced on the ground to form the roof overall hoisting unit, the space stability is extremely good, the safety risk of construction can be effectively controlled, the mounting quality is improved, the construction speed is increased, and the mounting construction period of a main steel frame can be saved by50%.

This invention relates to a kind of gel-type poly (methyl methacrylate) / organic rectorite electrolyte and its preparation method. It has the technique characteristics that poly (methyl methacrylate), organic rectorite and 1mol / L propylene carbonate solution of LiClO4 are adopted as raw materials. The preparation method is that, LiClO4 is dissolved in propylene carbonate (PC) to form 1mol / L organic solution of LiClO4. The prepared poly (methyl methacrylate) and modified rectorite are dissolved in the solution, and the mixture is stirred to homogeneity at a temperature of 55 deg. C and cooled to obtain the electrolyte mentioned above. This invention has the advantages of good ion conductivity of the electrolyte system and stereo, chemical and electrochemical stability. The technique is simple to achieve even in common laboratories and thus it is a simple, direct, environmentally friendly and practical method to prepare gel electrolyte.

In a system and method for maintaining the spatial stability of a sound field a balance gain may be calculated for two or more microphone signals. The balance gain may be associated with a spatial image in the sound field. Signal values may be calculated for each of the microphone. The signal values may be signal estimates or signal gains calculated to improve a characteristic of the microphone signals. The differences between the signal values associated with each microphone signal may be limited although some difference between signal values may be allowable. One or more microphone signals are adjusted responsive to the two or more balance gains and the signal gains to maintain the spatial stability of the sound field. The adjustments of one or more microphone signals may include mixing of two or more microphone. The signal gains are applied to the two or more microphone signals.

The invention discloses a space stability analysis method of an aircraft control system. The method comprises the following steps: 1), acquiring aerodynamic data; 2), solving aerodynamic derivatives on the basis of the aerodynamic data, and establishing a coupled aircraft motion equation between channels; 3),performing linearization analysis; 4),testing linearization analysis performance and improving results. Overall assessment and comprehensive design of aircraft flight tests can be achieved with the method, cause analysis and design improvement direction are provided for various instabilities of the aircraft under specific conditions, algorithm design work can also be promoted, various coupling flight states can be taken into account more comprehensively, and the method has obvious significance for accelerating the development progress of aircrafts.

In a system and method for maintaining the spatial stability of a sound field a balance gain may be calculated for two or more microphone signals. The balance gain may be associated with a spatial image in the sound field. Signal values may be calculated for each of the microphone. The signal values may be signal estimates or signal gains calculated to improve a characteristic of the microphone signals. The differences between the signal values associated with each microphone signal may be limited although some difference between signal values may be allowable. One or more microphone signals are adjusted responsive to the two or more balance gains and the signal gains to maintain the spatial stability of the sound field. The adjustments of one or more microphone signals may include mixing of two or more microphone. The signal gains are applied to the two or more microphone signals.

The invention discloses a high solid content and tinctorial strength carbon black aqueous pigment paste preparation method, which comprises: respectively weighing a dispersant, a wetting agent and deionized water according to a mass percentage ratio, pre-dispersing, adding a defoaming agent, defoaming, adding carbon black, placing into grinding equipment, and grinding, wherein a ratio of the nitrogen adsorption specific surface area to the DBP oil absorption value of the carbon black is 0.9-2.28, the adding amount of the dispersant is 20-40% of the mass of the carbon black, the adding amount of the wetting agent is 1-3% of the mass of the carbon black, the adding amount of the defoaming agent is 0.1-0.2% of the total amount of the solution, the rotation speed of the grinding motor of the grinding equipment is 1000-2000 r / min, the grinding time is 2-4 h, and the maximum particle size of the prepared carbon black aqueous pigment paste does not exceed 10 [mu]m. According to the present invention, the prepared carbon black water washing pigment paste has characteristics of small particle size distribution, increase of the space stability of the carbon black particles in the aqueous solution, high solid content, strong tinctorial strength, and good stability; and the preparation method has characteristics of simple operation, low cost, low consumption, and easy industrial production.

In a system and method for maintaining the spatial stability of a sound field a balance gain may be calculated for two or more microphone signals. The balance gain may be associated with a spatial image in the sound field. Signal values may be calculated for each of the microphone. The signal values may be signal estimates or signal gains calculated to improve a characteristic of the microphone signals. The differences between the signal values associated with each microphone signal may be limited although some difference between signal values may be allowable. One or more microphone signals are adjusted responsive to the two or more balance gains and the signal gains to maintain the spatial stability of the sound field. The adjustments of one or more microphone signals may include mixing of two or more microphone. The signal gains are applied to the two or more microphone signals.

The present invention discloses a manufacturing method of a diffuse flat plate reflector and a diffuse flat plate reflector. The method comprises: performing the physical grinding technology of the surface of a substrate to form a diffuse flat plate reflector body; performing the chemical etching technology of the diffuse flat plate reflector body to form a diffuse flat plate reflector having a diffuse surface; and forming a reflection film on the diffuse surface of the diffuse flat plate reflector through the coating technology. The diffuse flat plate reflector body with a large size and high flatness is manufactured through a physical grinding mode, a diffuse surface with good diffuse reflectivity through adoption of the chemical cleaning and etching method, the made diffuse flat plate reflector is subjected to experimental test and primary application to satisfy requirements at the aspects of the surface uniformity, the spatial stability, the reflectivity, the Lambert characteristics and the like, and the reflection film is plated to improve the reflectivity index of an infrared band and improve the surface stability so as to reach the purpose of application of the diffuse flat plate reflector in a spatial infrared band optical spectrum instrument.

The present invention relates to a gel polymer electrolyte and the preparation method. The technical characteristics are that the components in terms of weight include 1.0 mol of propylene type polymer with 50 to 75 percent of weight percentage and liquid electrolyte solution with 25 to 50 percent of weight percentage; the components of the propylene type polymer include 17g to 19g of methacrylate methyl ester, 16g to 18g of maleic anhydride, 350mL to 360mL of solvent and 0.0036g to 0.0040g of initiator; wherein, the mol ratio of methacrylate methyl ester and maleic anhydride is 1:1 to 1:1.5. The present invention takes poly(methacrylate methyl ester-maleic anhydride) P(MMA-MAn) as the matrix, thus greatly increasing the film forming and electric conductivity of the gel polymer electrolyte film and achieving the better mechanical performance and the space stability of the system.