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63 results about "Stress functions" patented technology
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In linear elasticity, the equations describing the deformation of an elastic body subject only to surface forces (&/or body forces that could be expressed as potentials) on the boundary are (using index notation) the equilibrium equation: σᵢⱼ,ᵢ=0 where σ is the stress tensor, and the Beltrami-Michell compatibility equations: σᵢⱼ,ₖₖ+1/(1+ν)σₖₖ,ᵢⱼ=0 A general solution of these equations may be expressed in terms the Beltrami stress tensor.
Pipe sleeve anti-rotary dentistry implant
The invention relates to a dental implant, comprising an implant part, an abutment part and a central positioning bolt, which is characterized in that a peripheral cylindrical spiral body of the implant part is divided into three sections of an implant shoulder part, an implant main body part and an implant cone part, a self-tapping slot is formed on the cone part, an inner hole which can be inserted in the abutment part to form the inner intubation sleeve type connection is formed therein; the inner hole is divided into the upper section of a conical part, the middle section of an implant inner hole deep part and the lower section of an implant inner thread with the diameter less than that of the middle section; the abutment part is a rotary body which is sequentially reverse conical, positive curved, positive conical and cylindrical from top to bottom at the periphery, the abutment part can be a solid body and can also be the rotating body with a through hole which can be equipped with the central positioning bolt at the center, and the periphery thereof is a circular table which is sequentially reverse conical, positive curved, positive conical and cylindrical. The dental implant of the invention has rapid implantation, great strength, tight positioning and early retention, which can prevent the rotation, transfer the scattered bite force and scatter the stress function of the central bolt.
Owner:FOURTH MILITARY MEDICAL UNIVERSITY
Bendable base shell and display device
ActiveCN106993385AAvoid affecting the display effectUniform stressIdentification meansElectrical apparatus casings/cabinets/drawersWrinkle skinDisplay device
The invention provides a bendable base shell. The base shell comprises a first semi-shell body, a second semi-shell housing and a bending part used for connecting the first semi-shell body and the second semi-shell body. The bending part comprises multiple connection plates whose long edges are successively attached to each other. The connection plates are successively connected through hinging pieces. Each hinging piece comprises a fixed plate, a fixed shaft vertically arranged on the surface of the fixed plate and a pin shaft. The fixed shafts are fixedly connected with the connection plates. The pin shafts are rotatably connected with adjacent connection plates. The beneficial effects are that when the base shell is bent, the connection plates allow the bending parts of a display panel to have uniform stress functions, so wrinkles at the bending parts of the display panel are prevented from affecting display effects.
Owner:WUHAN CHINA STAR OPTOELECTRONICS TECH CO LTD
Stress function calibration method
A method of predicting distortion in a workpiece may include measuring residual stress induced in a coupon surface of a plate coupon by a selected manufacturing operation. The induced residual stress measurements may be fitted to a curve shape function. A moment coefficient may be calculated based upon the fitted induced residual stress measurements. The moment coefficient may be used to calibrate a stress function and corresponding stress magnitude. The calibrated stress function may be applied to a model of the workpiece such that the distortion of the workpiece may be predicted.
Owner:THE BOEING CO
Non-Invasive Physiological Quantification of Stress Levels
InactiveUS20170127993A1Inertial sensorsEvaluation of blood vesselsChronic stressMeasuring instrument
A data acquisition device includes measuring instruments to generate physiological and / or psychological data streams. Microprocessors within the acquisition device process the generated data streams into metrics, which feed into stress function algorithms. Algorithm processing may occur either on the device, or metrics may be communicated via wireless communication for external processing on mobile devices and / or cloud-based platforms. The calculated stress functions inform cloud-based computational systems biology-derived models describing the dynamics of hormones and neurotransmitters released in the body in response to stressful stimuli. Stress hormone levels are quantified using these models, and are used in combination to serve as biologically inspired metrics of acute and chronic stress an individual is experiencing.
Owner:LIFEQ GLOBAL LTD
Method and system for numerically simulating foam-like material in finite element analysis
ActiveUS7308387B1High materialEliminate requirementsDesign optimisation/simulationSpecial data processing applicationsCompressible materialBi-isotropic material
A method and system to numerically simulating structural responses of a highly compressible material such as foam in finite element analysis is disclosed. According to one aspect of the simulation, a new improved method for calculating structural responses is derived using the following assumptions: uniaxial loading and isotropic material. As a result of the new method, Ogden polynomial stress function f(λ) is replaced by a tabulated function depending upon only a set of stress-strain curves obtained via uniaxial tension and compression tests. The method is implemented in a finite element analysis software product.
Owner:ANSYS
Well cementation cement sheath integrity analysis and forecast method and device
ActiveCN106991235AComprehensive consideration of elasticity and plasticityAccurately reflectGeometric CADDesign optimisation/simulationPredictive methodsStress functions
The invention provides a well cementation cement sheath integrity analysis and forecast method and device. The method comprises the steps that under a homogeneous crustal stress field, and based on the elastic thick wall cylinder theory and Mohr-Coulomb plastic yield guidelines respectively, the stress distribution and the displacement distribution of an elastic area of the well pitshaft and the stress distribution and the displacement distribution of the plasticity of the pitshaft area are calculated and obtained, the pitshaft area comprises a casing pipe, a cement ring and the surrounding rocks distributed from the inside to the outside; the stress distribution and the displacement distribution of the well pitshaft under the inhomogeneous stress field using the Airy stress function are calculated and obtained, the homogeneous stress field and inhomogeneous stress field are linearly overlaid and the result is the original stress field; the stress distribution and the displacement distribution of the pitshaft plastic area, and the stress distribution and displacement distribution of the pitshaft under the inhomogeneous stress field are utilized and linearly super-imposed to obtain the total stress distribution and displacement distribution in the pitshaft, which is used for the analysis and forecasting of cement sheath integrity. The well cementation cement sheath integrity analysis and forecast method and device take into account the cement sheath elastic plasticity, to reflect the work conditions of the real well bottom.
Owner:BC P INC CHINA NAT PETROLEUM CORP +2
Novel bidirectional inverted-T-shaped beam combined floor
The invention provides a novel bidirectional inverted-T-shaped beam combined floor which is applied to building structures in the engineering field. The novel bidirectional inverted-T-shaped beam combined floor comprises octothorpe-shaped components which are composed of a plurality of inverted-T-shaped steel beams. A plurality of small holes are sequentially formed in webs of the inverted-T-shaped steel beams of the octothorpe-shaped components. Steel bars are arranged between the small holes in the webs of the inverted-T-shaped steel beams in a crossed mode. The multiple octothorpe-shaped components form a bidirectional steel rib structure through splicing joints, and the bidirectional steel rib structure has a stress function during construction. Light prefabricated plates serving as a permanent formwork of the floor sequentially arranged in all cells of the bidirectional steel rib structure, and concrete is evenly poured on the bidirectional steel rib structure and the light prefabricated plates. The novel bidirectional inverted-T-shaped beam combined floor has the characteristics of being high in strength and rigidity and good in ductility; and formwork supporting is not needed, construction is easy, operation is easy, the self weight is low, the height of a structural layer is small, the effective service space is increased, and the economic benefits are good.
Owner:CHINA UNIV OF MINING & TECH
High-accuracy conversion method for ground stress calculation result among different scale models
ActiveCN107633146AReasonable designImprove computing efficiencySpecial data processing applicationsScale modelData file
The invention discloses a high-accuracy conversion method for ground stress calculation result among different scale models. In the method, according to a finite element fundamental theory, a stress conversion calculation formula among different models is deduced, and high-accuracy conversion from a large-range stress inversion model stress calculation result to a fine calculation model is realized on the basis of the back calculation of a result data file. The method does not need to carry out regressive calculation of the initial stress of new grid points again due to the calculation of thechange of a calculation model, and a foundation is laid for subsequent calculation and research. The beneficial effects of the scheme can be obtained by narration for the above scheme, and calculationefficiency is improved. Compared with a traditional method that a mathematical statistics method is adopted to fit an initial stress function in an engineering area, the method is characterized in that calculation accuracy and reliability can be improve.
Owner:STATE GRID CORP OF CHINA +2
Glass guardrail double-layer inhaul cable supporting system pedestrian bridge structure
ActiveCN105908617ABeautiful shapeSatisfy the functional requirements of the landscapeBridge structural detailsSupporting systemPre stress
The invention discloses a glass guardrail double-layer inhaul cable supporting system pedestrian bridge structure. According to the structure, upper prestress inhaul cables (1), lower prestress inhaul cables (2), guardrail glass panels (3) and bridge floor glass boards (4) are combined, shearing force is transmitted through the guardrail glass panels (3), and a new pedestrian bridge supporting system is composed of the guardrail glass panels (3) and the prestress inhaul cables and is reasonable in stress, light and attractive. The guardrail glass panels (3) are fixed between the upper prestress inhaul cables (1) and the lower prestress inhaul cables (2) through prefabricated joint fasteners (5), and the guardrail glass panels (3) can serve as pedestrian bridge guardrails and meanwhile serve as structural stressed components to transmit the shearing force. The bridge floor glass boards (4) are connected with the lower portions (3) of the guardrail glass panels (3) on the two sides through L-shaped connecting pieces (6). The novel structure integrates permeability, ornamental value and a stress function and has wide application prospects in construction of an urban street-crossing pedestrian bridge.
Owner:SOUTHEAST UNIV
Large deformation flexible body dynamic stress measurement information conversion method based on neural networks
ActiveCN104915509AImprove conversion accuracyEffectively filter out interferenceSpecial data processing applicationsNeural learning methodsComputation complexityNerve network
The invention discloses a large deformation flexible body dynamic stress measurement information conversion method based on neural networks, and belongs to the field of parachute measurement technologies and computer machine learning. The method is applied to the stress measurement in the movement process of a large deformation flexible body and especially applied to the stress measurement information conversion in the inflation process of parachutes, hovercrafts and the like. The method mainly includes the following steps of firstly, conducting voltage-stress calibration; secondly, filtering calibration data; thirdly, establishing a voltage-stress function; fourthly, obtaining voltage data under the actual environment and conducting filtering; fifthly, establishing the large deformation flexible body dynamic measurement data conversion neural network; sixthly, using the data training neural network under the actual environment; seventhly, obtaining and outputting stress information obtained through conversion. The voltage-stress information conversion is conducted through the neural networks, the calculation complexity is low, the conversion accuracy is high, and the method can be effectively applied to the dynamic stress measurement information conversion of the large deformation flexible body.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Structure and method of using step electrodes to realize nanometer beam drive and pressure resistance detection
InactiveCN101565162AAvoid stressReduce qualityIndividual molecule manipulationForce measurement using piezo-resistive materialsCapacitanceElectrical resistance and conductance
The invention relates to a structure and a method of using step electrodes to realize nanometer beam drive and pressure resistance detection, which are characterized in that a metal electrode on the upper part of the nanometer beam is of step-shape; the clearance between the two ends of the electrode and the nanometer beam is smaller than 100 nanometers; while the electrode clearance in the middlepart is between 1 and 2 microns. An MIS capacitor structure is formed between the two ends of the step electrode and the nanometer beam. When the voltage between the step electrode and the nanometerbeam exceeds the threshold voltage of the MIS capacitor, a space charge area below the MIS capacitor achieves the maximum value; and the resistance under the space charge area is only a stress function, which can be used for detecting the pressure resistance of the nanometer beam. The central part of the step electrode has small effect on the resistance value of the nanometer beam due to the largeclearance; the drive efficiency of the central part to the nanometer beam is high; and the central part is used for realizing static drive on the nanometer beam.
Owner:SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
Method for evaluating reliability of straight gear transmission system
ActiveCN105138794AReflect failure dependenciesReasonably reflect the service history effectSpecial data processing applicationsTime domainNormal density
The invention relates to a method for evaluating reliability of a straight gear transmission system. According to the method, the numbers of teeth of all gears, the static strength probability density functions of all the gears and the stress functions of all the pairs of meshing gears in the straight gear transmission system are acquired, the load spectrum of loads borne by the straight gear transmission system is obtained, and the probability density function of the stress amplitude of the load courses is obtained according to the load spectrum of the loads borne by the straight gear transmission system; the straight gear transmission system bearing the loads successively along with time evolution serves as a series system, namely, a time-domain series system in four-dimensional space-time, the reliability of all the pairs of meshing teeth is expanded to the reliability of the meshing gears, a reliability model of the meshing gears of the straight gear transmission system under the different load courses is established through a statistical averaging method, the reliability of all the pairs of meshing gears of the straight gear transmission system is calculated through the reliability model of the meshing gears of the straight gear transmission system under the different load courses according to the obtained load spectrum of the loads borne by the straight gear transmission system, and then the reliability of the straight gear transmission system is evaluated.
Owner:NORTHEASTERN UNIV
Stress-dependent coarse-grained soil seepage deformation characteristic tester and test method
The invention discloses a stress-dependent coarse-grained soil seepage deformation characteristic tester and a test method, and belongs to the field of rock-soil body seepage deformation parameter test. The stress-dependent coarse-grained soil seepage deformation characteristic tester aims to solve the technical problem that the change rule of a coarse-grained soil seepage deformation hydraulic slope and the measurement of a seepage coefficient after seepage deformation is carried out under the function of different stresses are investigated, wherein applied pressure is controlled through the air pressure of a pressure chamber, and the quick saturation of the coarse-grained soil can be achieved by an air extractor through the injection of air-free water. In a test process, the hydraulic slopes under different stress functions are obtained through a specific value of the reading difference of two piezometer tubes and the distance, and the change rule of the hydraulic slope along with stress change is analyzed. Flow changes in a testing process are recorded to obtain the seepage coefficient after the seepage deformation is carried out. The device has the advantages of simple and reasonable structure and convenience in operation and is mainly used for fields including civil engineering, water conservancy engineering and the like.
Owner:CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
Material point method-based stochastic dynamics analysis method applied to explosion shock engineering
The invention provides a material point method-based stochastic dynamics analysis method applied to explosion shock engineering. The method comprises the steps of building an engineering physical model; determining stochastic variables and performing discretization; dividing a background grid for a calculation domain; calculating a node load of the background grid, solving a momentum equation, andcalculating first-order and second-order partial derivatives of an accelerated speed of a grid node and an accelerated speed of a material point to basic stochastic variables; updating the position and speed of the material point and first-order and second-order partial derivatives of the position and speed of the material point to the basic stochastic variables; calculating a strain increment and a spin rate increment of the material point; calculating the density of the material point; according to a constitutive model, updating a stress of the material point and first-order and second-order partial derivatives of a stress function to the basic stochastic variables; according to a state equation model, updating a pressure and first-order and second-order partial derivatives of a pressure function to the basic stochastic variables; and calculating a structure stochastic response result. The defects of a conventional numerical calculation method in researching nonlinear problems of explosion, impact and the like are overcome.
Owner:HARBIN ENG UNIV
Method for making niobic magnesium acid lead-lead titanate single-crystal longitudinal vibration transverter
InactiveCN1921166AThe preparation process temperature is lowReduce performancePiezoelectric/electrostrictive devicesNiobiumWorking temperature
The invention relates to a method for preparing niobium magnesium acid lead-lead titanate single crystal longitudinal-vibration energy exchanger. Wherein, it comprises: using Ansys software to design front radiator, tail load and piezoelectric crystal pile, to be assembled; using table clamper to position the front radiator; functioning -12.0MPa prestress on the tail load; welding the positive copper electrodes via one wire, as the anode of energy exchanger; welding the passive copper electrodes via one wire as the cathode; putting it into low-temperature oven at 30-60Deg. C to be solidified for 20-72 hours; sealing and vulcanizing. The invention has low working temperature, simple stress function, to express the high electromechanical couple property of PMNT single crystal material, to control the receiving sensitivity of longitudinal vibration energy exchanger.
Owner:INST OF ACOUSTICS CHINESE ACAD OF SCI
Residual stress prediction method, device, server and storage medium
ActiveCN110532708ASolve inaccurateForecastingApparatus for force/torque/work measurementMeasurement pointStress functions
The embodiment of the invention discloses a residual stress prediction method, a residual stress prediction device, a server and a storage medium. The method comprises the following steps: constructing a stress function; symmetrically extending the stress function to construct a periodic function; expanding the periodic function by using a group of preset-order trigonometric series; respectively calculating a first deformation profile of the cutting surface by taking each order of trigonometric series as a residual stress value; fitting the first deformation profile with a second deformation profile obtained by experimental measurement to determine a coefficient corresponding to each triangular series; confirming the expression of the stress function according to the coefficient corresponding to each order of trigonometric series; and calculating by taking the distance between the point to be measured and the notch end of the test part as the input value of the stress function so as topredict the residual stress of the point to be measured. According to the technical scheme provided by the embodiment of the invention, the problem of inaccurate profile data obtained by measurementis solved. The batch calculation can be realized for residual stress distribution of test parts with the same geometrical shape.
Owner:HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
Member residual stress field prediction method based on limited test points
InactiveCN104848969AAvoid destroying experimentsEnsure Stress ContinuityForce measurementStress functionsDiscretization
The invention discloses a member residual stress field prediction method based on limited test points. The method comprises the following steps: 1, carrying out structural discretization; 2, classifying unit nodes, establishing a displacement shape function matrix and a unit stress function matrix, and then solving a unit matrix; 3, according to the unit matrix, establishing a stress shape particle residual stress vector array and an integral node load array, and solving an integral matrix; 4, according to the rank of the integral matrix, determining the number, distribution and testing of experiment test points; 5, according to a tested residual stress experiment result as a residual stress boundary condition, solving all stress shape particle residual stress; and 6, according to the stress shape particle residual stress and the unit stress function matrix, solving non-stress shape particle residual stress so as to obtain a residual stress field of a member. According to the invention, the residual stress of the member can be accurately predicted without restrictions of the material and the structural shape of the member, and the method has obvious advantages especially in a manufacturing process of an unknown member and residual stress prediction of a complex member.
Owner:HUAZHONG UNIV OF SCI & TECH
Visualizing high dimensional descriptors of molecular structures
InactiveUS20040241709A1Bioreactor/fermenter combinationsBiological substance pretreatmentsHorizonData set
The distribution of chemical compounds in high-dimensional molecular descriptor space can be viewed in two dimensions by applying the projection method of this invention. This method has particular usefulness for viewing the relationships of a large number of compounds such as found in a large scale HTS or virtual combinatorial library. After selecting a representative subset of the larger data set of compounds, initially components from the high-dimensional descriptor space are determined by PCA. In order to relax an NLM projection using the PCA components as a start, the stress function is modified to reflect a local horizon beyound which the separation of the compounds is not meaningfully measureable. The resulting two dimensional projections provide a clear insight into the distribution of the chemical compounds in the higher dimensional space. The method is clearly generalizable to viewing descriptor space in three dimensions and to using high dimensional descriptors other than those used to describe molecular structure.
Owner:PATTERSON DAVID E
Rolling stock axle interference assembly contact stress analysis method based on simulation
InactiveCN108197416ASatisfy the yield strength limitEfficient deliveryGeometric CADDesign optimisation/simulationElement modelElement analysis
The invention provides a rolling stock axle interference assembly contact stress analysis method based on simulation. The method includes taking a CRH2-type high-speed train trailer wheels as prototypes, and creating a three-dimensional digital model for axle interference assembly by SolidWorks software; converting the three-dimensional digital model for axle interference assembly into a SolidWorks finite element analysis module simulation, and creating a finite element model; setting the contacting mode of a contact surface group of wheel set-wheel axle interference assembly to be shrink fit,and performing interference contact stress analysis; selecting a plurality of different axle interference values within a specific range in an equal difference mode to perform analysis. The rolling stock axle interference assembly contact stress analysis method has the advantages that yield strength limits of axle materials are compared on the basis of multiple finite element analysis data, reasonableness and reliability of the interference range are judged and illustrated, and an interference-stress function model for axle interference assembly is determined.
Owner:谢红太
Application of FoxO1 gene in drug preparation
InactiveCN104069508APromote proliferationPlay a protective effectMetabolism disorderGenetic material ingredientsDiseaseAntioxidative stress
The invention belongs to the field of biological medicine and particularly relates to an application of a FoxO1 gene in drug preparation. According to the invention, the function of the FoxO1 gene in osteoblast proliferation differentiation under high sugar condition is researched so as to research the function of the FoxO1 gene in bone injury and osteoporosis induced by diabetes, in order to provide theoretical basis and experimental data for clinical treatment of diabetic bone injury and osteoporosis disease. The invention verifies that the FoxO1 gene can promote osteoblast proliferation, FoxO1 is used as a factor used for mainly regulating and controlling bone mass and has an antioxidant stress function on osteoblast, the FoxO1 gene generates a certain protection function on osteoporosis no matter in environment with increased oxidative stress level caused by ageing or diabetes or high blood sugar, and provides a new target for research and development of new anti-osteoporosis drugs.
Owner:RUIJIN HOSPITAL AFFILIATED TO SHANGHAI JIAO TONG UNIV SCHOOL OF MEDICINE
Reliability analysis method of mechanical component structure
InactiveCN108491627AWell formedEasy to understandGeometric CADDesign optimisation/simulationStatic timing analysisStructure analysis
The invention provides a reliability analysis method of a mechanical component structure, and relates to the technical field of mechanical component structure analysis. According to the method, firstly, statics analysis is carried out on mechanical components through AsysWorkbench, then Six Sigma Analysis is utilized to carry out DOE to obtain sufficient experiment data, a BP neural network is utilized to fit a maximum stress function, finally, a limit state equation of intensity degradation is constructed on the basis of Schaff's residual intensity theory, and reliability analysis and calculation are carried out to obtain a reliability analysis result of a mechanical component. According to the reliability analysis method of the mechanical component structure provided by the invention, anoperation process is simple, and reliability of calculation more accords with actual needs. The method has very high engineering practice feasibility and effectiveness.
Owner:NORTHEASTERN UNIV
Computer program and method for determination of electronic circuit card durability under exposure mechanical shock loading
InactiveUS20060161411A1Printed circuits stress/warp reductionForce measurementCalculation errorStress functions
An application program and method for determining the strength of electronic products exposed to mechanical shock, including application program steps of (i) describing the mechanical configuration of the electronic product; (ii) describing the stock response; (iii) calculating natural response modes of the circuit card; (iv) calculating stress functions for each component, each response mode; (v) using stress functions to determine modal component stresses at peak response; (vi) removing computer calculation error by comparing the stresses for all components to expectations; (vii) expectations numerically defined by performing equivalent analyses on test experience.
Owner:STARR JOHN E
Discrimination method of stability potential energy of overburden strata in metal mine supported by artificial pillars
ActiveCN109682946ADetermine stabilityEarth material testingStrength propertiesStress distributionTectonic stress
The invention provides a discrimination method of the stability potential energy of an overburden strata in metal mine supported by artificial pillars. A goaf overburden strata model is established, when the width of a goaf is larger than the length, the model is simplified to a thin section simply supported beam model, and stress distributions generated by the support force and tectonic stress ofa beam are calculated respectively; when the strata only supported by the beam, a plane-coordinate system is built, the stress function on a plane is calculated, and components of stress are obtained; when the strata is only subjected to the tectonic stress, the components of stress are calculated; when the strata is subjected to the combined action of the supporting force and the tectonic stress, the generated total stress distribution is calculated when the strata is subjected to the combined action of the supporting force and the tectonic stress, the potential energy of the whole strata is calculated, and the stability potential energy of the overburden strata in metal mine supported by artificial pillars is discriminated. The method can be used for analyzing the stress distribution and concentration degree, changing by the artificial pillars, of the goaf overburden strata, and meanwhile the stability of the goaf overburden strata is judged under supporting of the artificial pillars.
Owner:JIANGXI UNIV OF SCI & TECH
Non-invasive physiological quantification of stress levels
Owner:LIFEQ GLOBAL LTD
Compound preparation with anti-hypoxia stress function
InactiveCN103565873ARegulate pathologyRegulate physiological stateOrganic active ingredientsAntinoxious agentsAdjuvantAdditive ingredient
The invention provides a compound preparation with anti-hypoxia stress function, which is mainly used for preventing and treating various pathological or physiological states caused by hypoxic injuries and belongs to the field of medicine. The compound preparation with anti-hypoxia stress function is an oral preparation prepared from valerian extract, luteolin, camomile flower extract, conjugated linoleic acid and ginseng extract used as active pharmaceutical ingredients by using pharmaceutically conventional adjuvants and technique. The animal experiment indicates the anti-hypoxia compound preparation has favorable hypoxia resistance, and can effectively improve various hypoxic pathological states caused by lower oxygen content in the external environment. After the preparation is used by nearly 300 people, including soldiers rushing into the plateau, in-plateau troops and tourists and working personnel entering the plateau, the field experiment data indicates that the compound preparation can effectively the mental work capacity and physical endurance of the human body in a hypoxia environment.
Owner:中国人民解放军兰州军区疾病预防控制中心
Formation pressure correction method based on curvature
InactiveCN107589447AIn line with geological lawsIn line with the actual geological conditionsSeismic signal processingHorizonStress functions
The invention discloses a formation pressure correction method based on curvature. The method comprises the following steps: 1, a formation pressure 3D data volume P is acquired; 2, in view of a seismic interpretation horizon in the same range as the 3D data volume P, curvature attributes are extracted, and the curvature attributes are normalized as a contribution rate a of an extrusion structureto the formation pressure; 3, based on formation data, an extrusion structure stress function sigmaT is fit; and 4, a formation pressure 3D data volume PM after correction is calculated according to the following formula: PM=P+a.sigmaT. The curvature attributes are introduced during the formation pressure correction process, the contribution of the extrusion structure to the formation pressure canbe effectively reflected in the space, and a more accurate formation pressure prediction result can be acquired.
Owner:CHINA PETROLEUM & CHEM CORP +1
A vaginal mold for vaginal reconstruction and a manufacturing method thereof
The invention relates to a vaginal mold for vaginal reconstruction comprising a collapsible and expandable dome assembly (1) and a lower support assembly (2) snapped to the dome assembly (1). The vaginal mold prevents the vaginal mold from contacting the vaginal tip when the mold is squeezed into the vagina so that the mold is in close contact with the vaginal tip, The vaginal top skin graft receives the biggest stress function, causes the vaginal top skin graft to be too thin, produces the rupture, the inflammation and so on question as well as the vaginal top skin graft closely joins with the vaginal mold top surface, produces the skin graft and the mold top adhesion, causes the skin graft the peeling off question again when takes out the mold.
Owner:北京润美玉之光医疗美容门诊部
Thermal stress crack initiation method of surface annular groove root of bar blanking
ActiveCN105385819AShorten the blanking timeImprove cutting efficiencyFurnace typesProcess efficiency improvementStress concentrationMetallurgy
The invention discloses a thermal stress crack initiation method of a surface annular groove root of bar blanking. Before crack initiation, an annular groove is prefabricated in the surface of a metal bar, a deep cooling device is rapidly charged with liquid nitrogen, and the temperature in the deep cooling device is kept between -196 DEG C and -130 DEG C. Then, the metal bar is fed into the deep cooling device to be subjected to segmented rapid deep cooling. At the moment the cooling starts, due to the fact that the surface temperature is lower than the core temperature, the surface of the metal bar is sharply cooled and shrunk, large stress concentration is generated at the bottom of the annular groove under the instant tensile stress and the notch effect, and a microcrack cluster is produced. After crack initiation is ended, the metal bar is fed into a blanking machine to be subjected to segmented blanking. The notch effect and the thermal stress function are utilized, dynamic cracks generated in the later blanking process can enter the expanding stage more rapidly, and the overall blanking efficiency is improved.
Owner:XI AN JIAOTONG UNIV
Method and apparatus for detecting relation between evanescent field and Goos-Hanchen displacement, and optical device
ActiveCN105606032AEasy to controlMaterial analysis by optical meansUsing optical meansMomentumPotential field
The invention is applied to the technical field of optics, and provides a method and apparatus for detecting a relation between an evanescent field and Goos-Hanchen displacement, and an optical device. The method comprises the following steps: according to physical meanings of a stress function and a potential field function of light in the evanescent field, obtaining a potential field function of the evanescent field for total-reflection light; through combination with the potential field function of the evanescent field for the total-reflection light, obtaining a wave function of the total-reflection light after perturbation through a Schrodinger equation; and comparing the wave function of the total-reflection light after the perturbation with a wave function of free total-reflection light without an evanescent field effect, and the total-reflection light obtaining momentum having the same momentum property as the evanescent field under the effect of the evanescent field. According to the invention, better regulation and control of the Goos-Hanchen displacement can be realized, and the Goos-Hanchen displacement can be better applied to such fields as optical sensors, all-optical switches, light beam displacement modulators and the like.
Owner:NANKAI UNIV
A Two-way Inverted T Beam Composite Floor Slab
Owner:CHINA UNIV OF MINING & TECH
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