497results about How to "Good test result" patented technology

A method and apparatus for non-invasively evaluating endothelial activity in a patient, particularly for indicating the presence of an endothelial dysfunction condition, by applying an occluding pressure to a predetermined part of an arm or leg of the patient to occlude arterial blood flow therein; maintaining the occluding pressure for a predetermined time period; removing the occluding pressure after the elapse of the predetermined time period to restore arterial blood flow; monitoring a digit of the arm or leg by a digit-probe for changes in the peripheral arterial tone therein before and after the application of the occluding pressure to the arm or leg of the patient; and utilizing any detected changes in the peripheral arterial tone for evaluating endothelial activity in the patient. Particularly important advantages are provided when the occluding cuff is applied to the digit of the patient receiving the monitoring digit-probe, on the proximal side thereof with respect to the patient's heart, and also when a reference digit-probe is applied to another digit, not influenced by the occluding pressure, to compensate for shifts inherent to vascular beds.

The invention relates to a method for rapidly detecting cracks of a tunnel lining. The method comprises the steps that the surface of a tunnel is scanned by a vehicle-mounted CCD camera to obtain a crack image and the image is transmitted to an image acquisition card in real time; data of the crack image are transmitted to a computer by the image acquisition card; image discriminatory analysis processing is conducted on the data of the image by the computer, and therefore tunnel crack information is obtained, wherein the tunnel crack information comprises the positions, the lengths, the widths and the shapes of the cracks. The method is suitable for a road tunnel and a railway tunnel through different vehicle-mounted platforms and the application range is wide. Detection is conducted on the vehicle-mounted platform with the speed larger than 60km/h, an ideal detection result is obtained, and therefore detection cannot interfere in normal traffic in the tunnel. Fully-automatic data acquisition and processing are adopted, manual interference is not needed, detection speed is high, accuracy is high, and cost is low. The method is large in economic value and social value in the technical field of tunnel crack detection and is worthy of wide popularization and application.

The invention discloses precise assembling and adjusting device and method for a detector chip of an imaging system. The assembling and adjusting device comprises a movement control system, a detection system, an accessory structure and a computer; the movement control system is composed of a translation stage, a revolving stage and a tilting table and used for adjusting the spatial positions of a device to be detected and the detection system; the detection system is composed of an autocollimation and a telecentric digital microimaging system and used for measuring the angle and positional deviation of the device to be detected; and the compute is able to control the movement of the translation stage and record the position coordinates and can also be used for acquiring an image of the device to be detected from the telecentric digital microimaging system and analyzing and calculating. The assembling and adjusting method includes the assembling and adjusting of a reference mirror, the transmission of the angle and position of the detector chip, and the assembling and adjusting of the detector chip; the measurement precision of the angle and position respectively reaches second level and micro dimension during the assembling and adjusting; and the deviation of angle and position of the detector chip can be respectively less than 1 and 0.02mm after the assembling and adjusting.

The invention relates to the field of computer vision, and refers in particular to a detection and recognition method of human face in video under low-light conditions. The system aims at the specific problem of recognizing human face under low-light conditions, and is designed to satisfy the video system with a recognition function of human face under low-light conditions. An algorithm of the system consists of three steps: 1. preprocessing the video image of human face under low-light conditions, based on fuzzy theory; 2. training with a classifier, based on human face detection algorithm of Adaboost; 3. recognizing human face in modeling Video, based on feature fusion. The result of recognizing human face can finally be obtained. Actually, the method can be embedded in FPGA to be used in the video camera monitoring system or cameras with the recognition function of human face. The method has the advantages of good in stability, high in recognition rate, high in speed of calculation, effective in recognizing face feature under low-light conditions, applicable to various systems, such as night vision monitoring system and verifying system of identity under low-light conditions, and strong in practicality.

The invention discloses a multi-energy hybrid power comprehensive test device, belonging to the field of vehicle power performance test and relating to a comprehensive test device integrating a calibration system and an energy recovery system. A main part is formed by connecting an engine (1), a torque converter (2), a sensor (3), motors (4, 9), a sensor (5), a dynamometer (6), a brake (7), an inertia disc (8), a sensor (10), two rectification inverters (11 and 12), a battery-super capacitor (13), an engine ECU (Electronic Control Unit) (14), an integrated control system (18) and a calibration system (29) to a same shaft through a coupling (16). The test device can simulate the running conditions of most hybrid power vehicles, provide a test platform to develop the hybrid power vehicles, can also provide the test platform to harmoniously match a plurality of controllers, brake systems and control methods with the hybrid power vehicles and can finish about ten kinds of calibration tests relevant to the vehicle power performance test.

The invention relates to the technical field of heating furnaces of heat treatment equipment applied in the steel rolling industry, in particular to a high-efficiency intelligentized heating furnace control method. The method adopts a PLC (programmable logic controller) system for field control and an upper computer operating system communicating and connected with the PLC system to form an intelligent control system, and moreover, the intelligent control system is utilized to efficiently, scientifically and intelligently control a heat furnace. The method is characterized in that the intelligent control system controls and sets the heating furnace in the following six aspects: (1) furnace temperature control; (2) internal pressure control; (3) air-fuel ratio control; (4) safety protection system control; (5) adoption of an human-machine interface (HMI) on the intelligent control system; (6) history data recording. The method can reasonably control heating temperature, furnace temperature and furnace pressure at each stage in real time, increases the heating utilization rate, has an outstanding effect in saving energy and reducing consumption, increases the production efficiency, reduces the production cost, and prolongs the furnace service life.

The invention discloses a preparation device of random oriented multi-set joints rock bridge samples. The preparation device comprises I-shaped guide rails, a dead plate, L-shaped supports, angle control devices and insert devices. The lower part of the preparation device is composed of two parallelly-arranged pairs of I-shaped guide rails and rod pieces. A square formed by the I-shaped guide rails and the rod pieces has the same inner diameter as a sample box. The L-shaped supports are nested in the I-shaped guide rails. The angle control devices are fixed on the L-shaped supports. The insert devices are fixed on the angle control devices through fastening screws. Thus, all the above components together form a basic structure of the device. In comparison with the prior art, the invention has the following advantages: the device is practical and simple, and can manufacture multi-sets of joints; manufactured samples can be used in direct shear tests and true triaxial tests; and the device is convenient to use, has high precision and high practicability, and is adopted to achieve objectives of really stimulating joints, enhancing work efficiency, reducing experimental errors, optimizing test results and solving practical engineering problems.

The invention provides a deep learning ship target detection method based on edge candidate region extraction. The deep learning ship target detection method provided by the invention has the following advantages that a remote sensing image under different conditions is subjected to edge detection by utilizing a structured random forest model to obtain purposeful edge detection results, and the influence of sea states, illumination and other situations on the edge detection results is inhibited; candidate regions where targets possibly exist are extracted from the remote sensing image with large width by utilizing a candidate region extraction algorithm based on the edge detection results; the selection results are inputted into a deep learning network, so that the network processing efficiency is improved, and the detection speed is increased.

Disclosed are compositions for isolating populations of nucleic acids from biological, forensic, and environmental samples. Also disclosed are methods for using these compositions as one-step formulations for killing pathogens, inactivating nucleases, and releasing polynucleotides from other cellular components within the sample, and stabilizing the nucleic acids prior to further processing or assay. The disclosed compositions safely facilitate rapid sample collection, and provide extended storage and transport of the samples at ambient or elevated temperature without contamination of the sample or degradation of the nucleic acids contained therein. This process particularly facilitates the collection of specimens from remote locations, and under conditions previously considered hostile for preserving the integrity of nucleic acids released from lysed biological samples without the need of refrigeration or freezing prior to molecular analysis.

The invention belongs to the technical field of geotechnical engineering, and relates to a three-dimensional intermittent cut-through crack production apparatus and method of a cuboid rock test sample. The three-dimensional intermittent cut-through crack production apparatus comprises a stander, and an electric wire saw assembly, a three-dimensional moving assembly, a test sample fixing assembly and a crack width control assembly which are arranged on the stander. By adopting the three-dimensional moving assembly and the test sample fixing assembly, the multi-azimuth three-dimensional adjustment of the real rock test sample can be realized, and the production requirement of the cut-through crack can be met; meanwhile, the production of different intermittent prefabricated cracks of different dip angles and different widths can be completed by virtue of the cooperation of the electric wire saw assembly and the crack width control assembly; meanwhile, the problem of the manual saw wire cutting that the flatness and smoothness are insufficient and the crack difference of different samples is great can be effectively solved by virtue of the crack width control assembly, a test result can be maximally optimized, the accuracy of the test result can be guaranteed, and the cracking rule of the rock can be actually reflected.

The invention discloses a rapid and high sensitive molecular biosensor and a method of single-molecule detection of DNA or protein using the molecular biosensor. The molecular biosensor disclosed herein comprises: a) at least a single-walled carbon nanotube transistor device, wherein, the single-walled carbon nanotube transistor device comprises a grid electrode, a source electrode, a drain electrode and a conducting channel, the conducting channel is a single-walled carbon nanotube which is cut into two sections to form two single-walled carbon nanotubes with a gap of 1-10 nm; and b) an aptamer, wherein, the terminals of the aptamer are modified by terminal amino groups, and the aptamer is connected with the two ends of the carbon nanotubes forming the gap through an amide bond. The method is a reliable and practical method with general applicability. According to the method, nano/molecular electronics and the biosystem are combined, and the direct and real-time detection of the activities of DNA or protein with single-minded selectivity and ultrahigh sensitivity is realized by using functionalized mono-molecular devices and electric signal measurement.

The invention discloses a gas sensor based on a covalent organic frame material and a preparation method thereof, and belongs to the application field of the covalent organic frame material. Accordingto the method, a first monomer A is dissolved in a first solvent and a first interface modifier is added so as to obtain a first solution; a second monomer B is dissolved in a second solvent and a second interface modifier is added so as to obtain a second solvent; and a support substrate and a reaction catalyst are added after the solvent is uniformly mixed so that load type gas sensor can be obtained and a self-supporting type gas sensor can also be obtain by treating with an etching solution. The sensor can adsorb the solvent molecules into the pores to change the refractive index of the sensor so that rapid and significant color change occurs, and optical sensing and detection of organic vapor or water vapor can be realized.

The invention discloses a method for qualitatively and quantitatively analyzing histamine in muscles of miichthys miiuy by surface-enhanced Raman spectroscopy. The method comprises the following steps: mincing the muscles of the miichthys miiuy, making the minced muscles into minced meat, weighing certain parts of equivalent miichthys miiuy muscles to serve as samples, preparing histamine standard solutions of different concentrations, adding the histamine standard solutions into the samples, and using samples at different time points as labeling samples and prediction samples in a storage process; adding the labeling samples and the prediction samples into trichloroacetic acid, and filtering to obtain an extracting solution; measuring the histamine content of the miichthys miiuy meat of the prediction samples through HPLC (High Performance Liquid Chromatography); adding a nanometer enhancer into the extracting solution of the labeling samples, performing Raman spectrum data acquisition, and calculating corresponding Raman characteristic peaks of the histamine by a density functional theory; establishing a quantitative analysis model by using the peak intensity of the Raman characteristic peaks and the histamine content, and measuring the histamine concentration of the muscles of the miichthys miiuy by the quantitative analysis model. By adopting the method, the content of histamine of which the concentration is 1 to 150 mg/L in fresh fish can be detected accurately and quickly.

the invention discloses an extracting method of total plant protein and specific extracting liquid, which comprises the following parts with pH value at 7.5-8.5: 80-120mM EDTA, 80-120mM trimethyl aminomethane, 40-60mM sodium tetraborate and 40-60mM vitamin C, 0.8-1.2% polyvinyl polypyrrolidon,0.8-1.2% Triton-100, 1.5-2.5% 2-mercaptoethanol and 28-32% saccharose solution.

The invention provides a suction type SF6 gas leakage monitoring device and method. The device comprises an air outlet (1), an air inlet (2), an infrared light supply (3), a window piece I (4), a window piece II (5), a reference spectral filter (6), a measuring spectral filter (7), a dual channel infrared detector (8), a temperature probe(9), a signal conditioning module (10), an A/D (Analog/Digital) conversion module (11), a data processing module (12), a light source driving module (13), a device body (14), an end cover I (15) and an end cover II (16). The invention provides the suction type SF6 gas leakage monitoring device and method have the advantages that the suction type SF6 gas leakage monitoring device has a digital output and thermal compensation function and is simple and reliable, and the sensitivity is high. The method and the device can carry out ration monitoring on SF6 leaking so as to externally output a high-precision SF6 leaking concentration value, and the method and the device have the advantages that the monitoring accuracy is high, the method and the device are stable and reliable, the structure is compact, the volume is small and exquisite and the like.

The object of the present invention is to provide a carbonaceous material for an anode of a nonaqueous electrolyte secondary battery which uses a plant-derived organic material as a raw material, has high purity so that alkali metals such as the potassium element and alkali earth metals such as the calcium element are sufficiently removed by de-mineral treatment, and has excellent discharge capacity and efficiency, a novel manufacturing method capable of efficiently mass-producing the carbonaceous material, and a lithium ion secondary battery using the carbonaceous material.

The problem described above can be solved by a carbonaceous material for an anode of a nonaqueous electrolyte secondary battery obtained by carbonizing a plant-derived organic material, the atom ratio (H/C) of hydrogen atoms and carbon atoms according to elemental analysis being at most 0.1, the average particle size Dv₅₀ being from 2 to 50 μm, the average interlayer spacing of the 002 planes determined by powder X-ray diffraction being from 0.365 nm to 0.400 nm, the potassium element content being at most 0.5 mass %, and the calcium element content being at most 0.02 mass %.

A radiator integral manometry device is used to detect the leakage of the radiating fins. It includes water tank, landing gear, clamp device, power device. The landing gear includes two landing cylinders and two parallel support plates, the two parallel support plates which are welded into integrality are connected with plungers of the two landing cylinders, the two landing cylinders are separately mounted on two ends of the support plates. The power devices are air supply valve package and air supply tube, the air supply valve package has three switches which are separately connected with clamping cylinder, landing cylinder and pressurizing test window, the air supply transferred to the clamping cylinder, the landing cylinder and the pressurizing test window is controlled by the switches, the clamp device includes binding slide, clamping cylinder and pressurizing test window, said landing cylinder is welded with the binding slide into a integral body. The invention can detect the leakage of radiator rapidly and conveniently, it is economical and practical.