79results about How to "Good linear response" patented technology

A magnetic circuit having a dual magnet, a speaker and a vibration generating apparatus using the same are provided. The magnetic circuit includes a magnetic gap having a small magnetic loss and an increasing magnetic flux density, in which a uniform distribution of a line of magnetic force can be realized on yoke surfaces facing each other. The speaker includes lower and upper magnets which are spaced so that mutually identical polarities oppose each other; a first yoke integrally having a loop-type circulating circuit portion extended from the lower magnet to the upper magnet and an extension portion which is extended perpendicularly upwards from the lower magnet; a second yoke which connects between the lower and upper magnets and forms a magnetic gap between the second yoke and the extension portion of the first yoke; a coil disposed in the magnetic gap and wound around a bobbin; a frame which is extended from the first yoke; a vibrating diaphragm generating an acoustic sound in correspondence to a drive signal; a damper limiting a vibration range of the bobbin; and a center cap covering the bobbin.

A vibratory exercise apparatus capable of providing a sufficient vertical movement force is provided, which adopts a structure that a bobbin coil connected with a vibration plate is employed in a magnetic gap of a magnetic circuit using a permanent magnet which can generate a strong magnetic force. The vibratory exercise apparatus includes a magnetic gap type vertical vibrator which generates vertical vibration by a permanent magnet and a bobbin coil, a bobbin guide which is installed at the center of a yoke, a bobbin guide rod which is reciprocally movably coupled with the bobbin guide and whose one end is coupled with the upper portion of a bobbin, a joint whose one end is coupled with the upper portion of the bobbin, a vibration plate which is coupled with the other end of the joint, a guide which guides vertical movement of the vibration plate, and a spring which limits a range of movement of the vibration plate and absorbs impact when the vibration plate descends.

The invention provides a portable copper ion concentration detection method based on click chemistry and belongs to the field of analytical chemistry. Under the condition that sodium ascorbate reduces cupric into cuprous as a catalyst, a 1,3-dipole cycloaddition reaction is carried out between NDA modified with an azide group and DNA modified with an alkynyl group, so that DNA modified with cane sugar invertase is fixed on magnetic beads; The magnetic beads are separated from a solution, the cleaned magnetic beads are dissolved into a cane sugar solution to carry out enzymatic hydrolysis, and then a reaction solution after enzymatic hydrolysis is measured by adopting a blood glucose meter, so that copper ion concentration can be detected. The portable copper ion concentration detection method provided by the invention takes the blood glucose meter as a platform and can portably and quickly detect the copper ion concentration on site; and the portable copper ion concentration detection method can be applied to copper ion detection in a human body serum sample, and the portable copper ion concentration detection method has the advantages of easy operation, low cost, high sensitivity and good specificity.

The invention relates to the technical field of spectra, in particular to a circulating tumor cell detection method based on a surface-enhanced Raman spectroscopic probe. The method includes the steps: building the surface-enhanced Raman spectroscopic probe taking luteinizing hormone-releasing hormone as a targeting molecule; using the surface-enhanced Raman spectroscopic probe for circulating tumor cell detection. The surface-enhanced Raman spectroscopic probe is rapider, more convenient and lower in cost when being used for circulating tumor cell detection, has enough specificity and flexibility for circulating tumor cell detection and can provide a feasible strategy for clinical practice.

The invention relates to an intelligent vehicle automatic vehicle motion control system and a control method thereof. The intelligent vehicle automatic vehicle motion control system and the control method thereof solve the problem of the lack of safe and reliable intelligent vehicles in the prior art. The key points of the technical scheme of the intelligent vehicle automatic vehicle motion control system and the control method thereof are that navigation trajectories comprise a main navigation trajectory, auxiliary navigation trajectories which are arranged on both sides of the main navigation trajectory respectively and parallel to the main navigation trajectory, and a magnetic navigation trajectory embedded under the main navigation trajectory; a navigation identification modules comprise a main video identification navigation module corresponding to the main navigation trajectory, a magnetic induction module, and an auxiliary video navigation identification module corresponding to the auxiliary navigation trajectories; a wireless communication module, the main video identification navigation module, the magnetic induction module and the auxiliary video identification navigation module are connected with a master controller; a communication device is communicated with the wireless communication module. The intelligent vehicle automatic vehicle motion control system and the control method thereof are safe, reliable and high in stability.

The invention which discloses a Co3O4 nanocrystal, a preparation method thereof, a use thereof and a non-enzymatic hydrogen peroxide sensor thereof relates to a nanostructure. The Co3O4 nanocrystal has a flower spray-shaped crystal morphology. The preparation method comprises the following steps: mixing an aqueous Co<2+> solution with 8-hydroxyquinoline and urea, reacting under a hydrothermal condition to obtain a solid deposit which is a Co and 8-hydroxyquinoline complex, and roasting the complex as a precursor at a high temperature to obtain the Co3O4 nanocrystal. An inert electrode is modified by the Co3O4 nanocrystal to prepare the hydrogen peroxide sensor which is used for measuring the concentration of hydrogen peroxide in a solution. The method provided in the invention, which is simple and mild and treats the complex as the predecessor, allows the flower spray-shaped Co3O4 nanocrystal with the advantages of high yield and high quality to be obtained.

The invention discloses a preparation method and application of a modification electrode. According to the preparation method, a polysulfanilic acid modified graphite electrode is prepared, the electrochemical behavior of o, m and p-nitrophenol on the electrode is studied through a cyclic voltammetry method, and a cyclic voltammetry curve is subjected to semi-differential treatment, so that the sensitivity and the separation degree of the electrode are further improved. The result shows that in a phosphate buffer solution of which the pH value is 8.00, the modified electrode has a remarkable function in distinguishing electrochemical oxidation of three isomers and a function of remarkably improving the current sensitivity. Compared with a naked graphite electrode, according to the graphite electrode, the differences of two adjacent oxidation peak potentials between o-nitrophenol and p-nitrophenol and between p-nitrophenol and m-nitrophenol are respectively increased to be 90mV and 155mV from 80mV and 133mV, and meanwhile the measurement sensitivity is remarkably improved, the peak current and the concentration of components are in relatively good linear response, and the electrode is good in reproducibility and stability.

The invention discloses a nano-material surface-catalyzed luminescent micro-sensor, which is simple in structure, capable of shortening detection time, good in stability and reproducibility and high in detection efficiency and precision. The micro-sensor has an optical filter or grating (1) and a photoelectric-signal conversion device (2) and is provided with a shell (3), wherein a heating element (4) and a quartz capillary tube (5) are arranged inside the shell (3); the inner wall of the quartz capillary tube (5) is coated with nano-material (6) and is provided with a light transmission surface (7); the light transmission surface (7) is arranged opposite to the optical filter or grating (1); and two ends of the quartz capillary tube (5) are connected with a sample inlet tube (8) and an escape tube (9) respectively.

The invention provides a binary rare earth organic framework crystal material. The chemical formula of the binary rare earth organic framework crystal material is [Me2NH2][EuxTb1-xL(H2O)4], wherein x is greater than 0 and less than or equal to 5; Me represents methyl; L represents an organic ligand formed by pyridine-2,6 m-phthalic acid; crystals belong to an orthorhombic system, the space group is Pnma, and the cell parameters are as follows: a=8.500 to 8.506 Angstrom, b=17.28 to 17.35 Angstrom, and c=12.05 to 12.15 Angstrom; alpha is equal to 90, beta is equal to 90, gamma is equal to 90, and Z is equal to 4. The binary rare earth organic framework crystal material is extremely high in heat stability and air stability, and can be used for temperature detection within a wide range of 77K to 450K; the temperature range covers a low temperature region, a physiological temperature region and a high temperature region, and is the widest detection temperature range which can be realized at the present.

The invention discloses a method for determining activity of terminal deoxynucleotidyl transferase (TdT) and application of the method. The method comprises the steps of: (1) designing a single-stranded DNA as a DNA probe; (2) incubating TdT with different final concentrations with DNA probes, CoCl2, dTTPs and a buffer solution separately to obtain a single-stranded probe DNA solution rich in a poly-T sequence; then adding a mercury salt to incubate to obtain a T-HgII-T structure-mediated double-stranded DNA solution; adding a nucleic acid dye to obtain a mixed solution; and finally detectinga fluorescence intensity signal of the mixed solution, and drawing a detection curve according to the fluorescence intensity signal and the final concentration of TdT; and (5) replacing the TdT with asample to be tested, repeating the above steps, and then comparing the detection result with the detection curve to calculate the content of TdT in the sample to be tested. The method has high sensitivity and good selectivity, and provides a new means for medical detection and biological research.

A thin-film magnetic head includes a lower electrode layer, an MR multi-layered structure, through which a current passes in a direction perpendicular to a lamination plane, stacked on the lower electrode layer, soft magnetic layers for magnetic domain control formed on both sides in a track width direction of the MR multi-layered structure, an anti-ferromagnetic layer for magnetic domain control continuously stacked on the MR multi-layered structure and the soft magnetic layers for magnetic domain control, the anti-ferromagnetic layer mutually exchanged-coupled to the soft magnetic layers for magnetic domain control, and an upper electrode layer stacked on the anti-ferromagnetic layer for magnetic domain control.

The invention discloses a fluorescence chemical method for detecting ALP (Alkaline Phosphatase) and application thereof. The fluorescence chemical method comprises the following steps of: firstly, designing a single-chain DNA (Deoxyribonucleic Acid) of which a 3' terminal is phosphorylated as a DNA probe, dephosphorylating the 3' terminal of the DNA probe and exposing a 3'-OH terminal when the ALPexists; secondly, performing catalytic addition on dTTPs (Deoxythymidine Triphosphates) at a 3'-OH terminal of the DNA probe by TdT (Terminal Deoxynucleotidyl Transferase), thus extending to generatea poly-T tail ssDNA, forming a dual-chain DNA mediated by T-HgII-T structure by the poly-T tail ssDNA and Hg ions, and drawing a detecting curve according to a detected fluorescence intensity signaland the concentration of the ALP after adding nucleic acid dye; finally, replacing the ALP with a to-be-detected sample, repeating the steps, and comparing a detecting result with the detecting curve,thus calculating the content of the ALP in the sample. The fluorescence chemical method disclosed by the invention is simple and convenient, is high in sensitivity and can be used for detecting the ALP or screening ALP inhibitors.

The invention discloses a capacitive touch board for improving linear response, which is invented for improving the linear response of the capacitive touch board. The capacitive touch board comprises a plurality of sensors, wherein each sensor is provided with a plurality of parallel adjacent traces; a certain distance is reserved between the centers of adjacent sensors; and a maximum gap smaller than the distance is reserved between adjacent traces. By adopting the structure, the maximum gaps MXgap and Mygap between the adjacent traces are respectively smaller than PX and PY, so that the capacitance variation linearly changes more stably whether the capacitance variation moves towards X direction or Y direction and further the linear response of the capacitive touch board is improved.

This invention relates to an optical fiber and grating sensor with adjustable wavelength and one optical section with light fiber and grating, which are characterized by that the optical fiber goes through the protection cover tube, first clamper middle hole and second clamper middle hole. The said protective cover tube both ends are separately stuck to first and second clampers with soft glue and adhesive agent and stretches the optical section with optical fiber and grating and ensures the optical fiber and grating at the right middle of the protection cover tube. This invention fills the two holes with fix glue stuck to first and second clampers to form one body to make the optical fiber and grating sensor. The said first and second clampers outside screw are located with micro-adjust screw cap. íí