12results about How to "Improve detection depth" patented technology

The invention relates to a tower-shaped test and penetration test inspection method for a large-diameter tube blank. According to the method, the defects of different depths below the surface can be effectively evaluated, and the detection rate of micro hairlines (lt: 0.5 mm) is obviously improved; the distribution rule of the defects in the radial direction and the axial direction of the pipe blank is obtained, and a direction is provided for process improvement; according to the invention, by quantizing data, human experience misjudgment is avoided, and the reliability of quality control is improved; the method is particularly suitable for large pipe blanks, and fills the blank of precision defect detection of the size section.

This invention provides a method, system, and electronic device for detecting application behavior, relating to the field of computer security technology. The method includes: collecting system call data of a target application in user mode and kernel mode; extracting basic statistical features representing the statistical regularity of the calls and deep sequence features representing the correlation between the calls from the system call data, forming a system call feature set; and inputting the system call feature set into a behavior detection model trained based on a normal behavior feature library for analysis to obtain behavior detection results. This invention achieves full-stack, blind-spot-free monitoring of application behavior by simultaneously collecting system call request context in user mode and actual execution data in kernel mode, improving the accuracy and reliability of behavior detection. Furthermore, by constructing a hierarchical feature system combining basic statistical features and deep sequence features, it greatly enhances the detection depth and sensitivity for new and complex threats.

This invention relates to the field of identification technology for precious woods and medicinal materials, particularly a method for non-destructive testing of agarwood based on micro-CT to determine its authenticity and quality. The technical solution includes: acquiring complete three-dimensional data of the agarwood interior through micro-CT non-destructive scanning; extracting characteristic parameters such as the three-dimensional topological structure of the interstitial phloem, the distribution and fullness of agarwood resin, and abnormal structures; identifying authenticity by comparing these parameters with a pre-built database, particularly effective in identifying internal forgery traces such as high-pressure oil injection and mechanical compression; simultaneously, using a multi-parameter fusion model to quantitatively evaluate the spatiotemporal distribution characteristics of agarwood resin and the proportion of resin-containing interstitial phloem to determine its quality grade; achieving comprehensive, objective, and non-destructive testing of agarwood from the inside out, from authenticity to quality, especially suitable for identifying high-end crafts, collectibles, and precious agarwood raw materials, solving the industry pain point that traditional destructive testing methods cannot be applied to intact products.

The invention belongs to the technical field of nuclear magnetic resonance logging, and discloses a nuclear magnetic resonance logging instrument probe. Comprising a center support, a magnet assembly, a magnet protection shell, a magnetic core assembly and a magnetic core protection shell. The central support is provided with a mounting shaft and radial limiting parts at two ends. The magnet assembly is mounted on the mounting shaft, is positioned between the two limiting parts, comprises a first semi-cylinder group formed by splicing a plurality of small magnets on the upper side and a second semi-cylinder group formed by splicing a plurality of large magnets on the lower side, and is used for generating a radially enhanced static magnetic field. And the magnet protection shell is formed by buckling an upper shell and a lower shell which respectively cover the first semi-cylinder group and the second semi-cylinder group. The arc-shaped magnetic core assembly is attached to the periphery of the upper shell to guide a magnetic circuit and enhance a radio frequency magnetic field, and the outer side of the arc-shaped magnetic core assembly is coated with a magnetic core protection shell connected with the magnet protection shell. The magnetizing directions of the large and small magnets are tangentially arranged along the circumference of the probe; and the lower shell is made of a magnetic conductive material to form a magnetic shielding structure for shielding a stray magnetic field at the bottom. The probe can significantly increase the detection distance.

The present application relates to the technical field of computer software security, and specifically discloses a multi-agent collaborative arrangement method and system based on software supply chain security detection, wherein a task disintegration and stage arrangement engine is constructed to organize multiple special security detection agents such as SCA agents, code audit agents and license detection agents into a directed acyclic graph type detection pipeline; a task state machine is used to manage the life cycle state of each detection node, and asynchronous queues are used to realize decoupled communication between agents; the scanning results of upstream agents are used as the task input and strategy parameters of downstream agents to realize result-driven dynamic arrangement; and a failure node compensation mechanism is used to automatically retry or degrade and replace abnormal detection nodes to ensure the integrity of the overall detection task and improve the reliability and integrity of software supply chain security detection.

The invention discloses a far detection nuclear magnetic resonance logging instrument probe, which relates to the technical field of petroleum logging, and comprises a protective shell, a support piece, a magnet assembly, a magnetic core assembly and a detection antenna, a protection cavity is formed in the protection shell; the magnet assembly comprises a main magnet and two sets of auxiliary magnets which extend in the axial direction of the protection cavity. The main magnet is arranged in the middle of the protection cavity and is symmetrical about the supporting piece, and at least part of the outer wall surface of the main magnet is a convex arc surface; the two sets of auxiliary magnets are arranged on the two sides of the main magnet in the axial direction of the protection cavity, and the sets of auxiliary magnets are symmetrically arranged relative to the supporting piece. The magnetic core assembly is arranged in the protection cavity and extends in the axial direction of the protection cavity, and the magnetic core assembly is arranged on the outer side of the main magnet and is symmetrical about the supporting piece. The detection antenna is arranged on one side in the protection cavity and fixedly attached to the outer wall face of the magnetic core assembly on the two sides of the supporting piece, and the detection antenna is electrically connected with an external detector. According to the probe of the far detection nuclear magnetic resonance logging instrument, the detection depth can be increased.

The embodiment of the invention provides a cable sheath defect detection method and device based on ultrasonic guided waves. The method comprises the following steps: generating an ultrasonic guided wave excitation signal; applying an ultrasonic guided wave excitation signal to a cable corrugated aluminum sheath through an emission sensor; receiving an ultrasonic guided wave signal reflected from the cable corrugated aluminum sheath through a receiving sensor; analyzing the reflected ultrasonic guided wave signal to detect defects in the cable corrugated aluminum sheath; wherein the step of analyzing the reflected ultrasonic guided wave signal comprises the substeps of identifying a direct wave, a defect echo and an end face echo in the reflected ultrasonic guided wave signal; defect types and severity are determined based on at least one feature of the defect echoes, the defect types including at least one of an ablation defect, a manufacturing defect, and an external damage defect. The characteristic of high penetrability of ultrasonic guided waves is utilized, internal and deep defects of the aluminum sheath are effectively detected, the detection precision and depth are remarkably improved, a single low-frequency mode is combined with a clear criterion, and rapid and accurate distinguishing and positioning of defect types are achieved.

To address the limitations of existing chopping decoupling methods, such as waveform distortion and residual interference, which cause weak induced polarization (IP) signals at deep depths to be submerged by noise and fail to meet the requirements for deep ore body identification, this invention provides a half-wave decoupling method and apparatus for IPD detection based on multi-level transmission. By employing single-field-source multi-level transmission technology at the transmitting end, a multi-level signal waveform is synthesized to provide a waveform signal for decoupling at the receiving end. Furthermore, at the receiving end, a translation-convolution decoupling method is proposed. Through waveform translation, frequency-division convolution, and signal amplitude compensation, the electromagnetic coupling signal and the effective IPD signal are accurately separated, avoiding the loss of effective signal in traditional chopping decoupling methods.

The application discloses a near-infrared fluorescent probe for detecting viscosity of liquid food, and a preparation method and application thereof. The fluorescent probe is 2-(2-6-(diethylamino)-1,2-dihydrocyclopenta[b]chromen-3-yl)vinyl)-3-ethyl-1,1-dimethyl-1H-benzo[e]indol-3-ium salt. The fluorescent probe contains two kinds of rotor elements, i.e. a vinyl bond and a single bond, which is beneficial to sensitive response of the probe to viscosity change. The probe has a long emission wavelength in a high-viscosity solvent, which can reach 787 nm, and has strong fluorescence penetration, low background interference and high signal-to-noise ratio. In addition, the probe has good selectivity for the high-viscosity solvent and high sensitivity, and therefore, the probe can be applied to detection of viscosity of liquid food.

This invention discloses a quantitative detection method for the conductivity of solid conductive media using inductive magneto-thermo-acoustic methods, belonging to the field of non-destructive testing technology. It establishes a quantitative mapping relationship between ultrasonic measurement signals and conductivity distribution by deeply analyzing the multi-field coupling relationship of solid conductive media under pulsed electromagnetic excitation; constructs a mathematical model of magneto-acoustic-thermo-acoustic multi-field coupling under solid constraint conditions to accurately solve the forward problem of electromagnetic and acoustic fields; optimizes the excitation and receiving system parameters to improve detection resolution and signal-to-noise ratio; reconstructs the sound source term using a time-inversion method-compressed sensing joint algorithm, and achieves quantitative conductivity inversion using a least-squares iterative algorithm based on Lorentz force divergence-thermal function; quantifies and calibrates the inversion results to ensure detection accuracy; reconstructs the conductivity distribution using imaging technology to identify abnormal regions; and finally generates a standardized detection report.

This invention relates to a dynamic detection method for the roundness fluctuation of the inner ring of a bearing in the field of bearing testing technology, comprising the following steps: S1, supporting the outer ring of the bearing with non-contact magnetic force and actively stabilizing the outer ring in a preset spatial posture; S2, applying a preset multi-dimensional dynamic excitation force to the outer ring of the bearing; S3, driving the inner ring of the bearing to rotate around its axis. This invention combines non-contact magnetic support and stabilization of the outer ring with independent driving of the inner ring rotation, so that the bearing under test is in a dynamic condition that is closer to the actual complex support state, thereby stimulating a more realistic and richer dynamic fluctuation signal. Based on the dynamic response signal, the dynamic roundness fluctuation component caused by the roundness error of the inner ring raceway is separated and quantified by a coupling and decoupling algorithm.

The application provides a kind of three-dimensional lake blue-green algae biomass spectrum detection system, comprising: host computer and probe;Host computer and probe are connected by optical fiber;Light source emits light beam to light source reflection coating, produces diffuse reflection light beam to detection warehouse;Water tower head is arranged on the other side of detection warehouse, for the water body from detection warehouse is extracted after detection is completed;Collimating lens group is arranged on the top surface of detection warehouse, for imaging to the water body to be measured;Collimating lens group is connected with optical fiber through connecting device, and then connected with optical fiber switching structure and optical fiber spectrometer through optical fiber respectively.Diffuse reflection light beam enters the inside of detection warehouse through light inlet hole and irradiates the water body to be measured, and then the image is transmitted to optical fiber spectrometer through optical fiber after collimating lens group imaging, to obtain the spectral data of the water body to be measured.The application has the advantages of practical, portable, low cost and low power consumption.