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34results about How to "Increase the interaction area" patented technology

Microfluidic biological detection system and method

The invention discloses a microfluidic biological detection system and method. The system comprises a microfluidic biological chip, an evanescent wave optical fiber SERS (Surface Enhanced Raman Scattering) probe and a portable Raman spectrometer, wherein the microfluidic biological chip comprises a microfluidic channel and a probe connector; the microfluidic channel is located in the microfluidicbiological chip; the probe connector penetrates to a detection region of the microfluidic channel in the microfluidic biological chip from the outer part of the microfluidic biological chip; a probe comprises a transmission section and a sensitive section; the sensitive section is composed of an evanescent wave optical fiber structure and a noble metal nano-structure with a localized field enhancement property; the evanescent wave optical fiber structure is located at one end of the transmission section; the noble metal nano-structure is located on the surface of the evanescent wave optical fiber structure; when microfluidic biological detection is carried out, the sensitive section of the probe stretches into the detection region of the microfluidic channel through the probe connector; and a second end of the transmission section is connected with the portable Raman spectrometer. By adopting the microfluidic biological detection system and method, the preparation difficulty and cost of a substrate can be effectively reduced and the microfluidic biological detection sensitivity is improved.
Owner:DONGGUAN UNIV OF TECH

Carbon nano-tube reinforced carbon fiber thermosetting resin-based composite material preparation method

The invention provides a carbon nano-tube reinforced carbon fiber thermosetting resin-based composite material preparation method, which comprises: preparing a carbon nano-tube electrophoresis suspension; growing carbon nano-tubes on the surface of carbon fibers; placing the prepared carbon nano-tube electrophoresis suspension in an electrolytic cell, and carrying out carbon nano-tube electrophoresis deposition on the surface of the carbon fiber by using a stainless steel plate as an anode and using a cut carbon fiber cloth as a cathode; placing the carbon fiber cloth obtained after electrophoresis deposition in an oven, and drying for 80-120 min; and mixing a thermosetting resin and a curing agent to obtain a resin mixture, placing the resin mixture and the dried carbon fiber cloth into amold, and molding to prepare the carbon nano-tube reinforced carbon fiber thermosetting resin-based composite material. According to the present invention, the carbon nano-tubes grow on the surface of carbon fibers so as to effectively achieve the uniform dispersion of the carbon nano-tubes; and by introducing the carbon nano-tubes, the interaction area between the fibers and the resin is significantly increased so as to improve the interlayer shear strength of the thermosetting resin-based composite material.
Owner:LINGYUN INDAL CORP

Novel steel pipe pile foundation for preventing pile circumferential soil from being liquefied under action of waves

The invention discloses a novel steel pipe pile foundation for preventing pile circumferential soil from being liquefied under an action of waves. The novel steel pipe pile foundation is characterizedin that a vacuum cavity is formed in a steel pipe pile below a seabed mud surface, the vacuum cavity is connected to a vacuum pump through a suction pipe, the vacuum pump is provided with a water outlet, drainage holes are distributed in the wall of the steel pipe pile corresponding to the vacuum cavity, water is permeated to the pile circumferential soil and enters the vacuum cavity through thedrainage holes, and then under the action of the vacuum pump, the pile circumferential soil is discharged to the vacuum pump through the suction pipe and then is discharged from the water outlet; andpreference is given, the device can further comprise a wave energy conversion section, a permeation layer expansion section and the like. According to the novel steel pipe pile foundation, the pore water pressure caused by the waves is reduced on the premise that the property of the pile circumferential soil is not changed, so that the liquefaction is prevented and the environment influence is small; the vacuum suction force is manufactured by utilizing the wave energy, and extra energy consumption is not needed; and the effect area of the pile soil is expanded by the permeation layer expansion section, so that the soil resistance is fully obtained so as to reduce the displacement response of the pile foundation under the action of the waves.
Owner:HOHAI UNIV

Hoist optical fiber for transmitting hollow light beams

The invention discloses a hoist optical fiber for transmitting hollow light beams and belongs to the technical field of optical fiber structure design. The hoist optical fiber includes an air fiber core, a fiber core anti-resonance single ring, a quartz supporting frame, a cladding air layer and a quartz cladding layer; the fiber core anti-resonance single ring forms an anti-resonant wall; and a fiber core is filled with air, so that the air fiber core can be formed; and the quartz supporting frame is adopted to support the fiber core anti-resonance single ring. The wall thickness of the fibercore anti-resonance single ring, the position of the joint point of the quartz supporting frame and the fiber core anti-resonance single ring, the size of the joint point and the wall thickness of the quartz supporting frame can be adjusted, and therefore, the hollow-core anti-resonance single ring used for blue-detuned atomic guide can be realized. The hoist optical fiber is small in transmission confinement loss and is simple in structure, and therefore, the hoist optical fiber can better transmit the hollow light beams, and the interaction area between light and atoms and the guiding efficiency of the atoms can be improved, the realization of an experiment of blue-detuned atomic guide can be benefitted, and a high-precision atomic interference gyroscope can be realized.
Owner:BEIHANG UNIV

Offshore wind power single pile-friction wing composite foundation and construction method thereof

The invention discloses an offshore wind power single pile-friction wing composite foundation and a construction method thereof. The offshore wind power single pile-friction wing composite foundation comprises a single pile and a friction wing, wherein the friction wing is connected to the single pile through a force transmission pipe, a conical transition section of the single pile goes deep into a seabed bearing stratum, and the force transmission pipe of the friction wing located in the bearing stratum is in close contact with the conical transition section of the single pile; a side wing of the friction wing is connected to the outer wall of the force transmission pipe, and a ring wing is arranged in a side wing included angle. According to the offshore wind power single pile-friction wing composite foundation, the friction wing is of a through structure in the axial direction, so that the friction wing can conveniently penetrate through a seabed sludge layer to be embedded into the bearing stratum; the side wing, the ring wing and the force transmission pipe support each other, so that the structural stability of the friction wing is kept, a soil arching effect is generated between the side wing and the ring wings by a soil body, the resistance of the soil body is remarkably improved, the interaction area of the structure and the soil body is increased by the friction wing, and the bearing capacity of the single pile-friction wing composite foundation is improved.
Owner:CHINA THREE GORGES CORPORATION +1

A Cold Cathode Radiation Source Based on Helical Ribbon Electron Injection

The invention discloses a cold cathode radiation source based on spiral ribbon electron injection, which relates to the technical field of microwave, millimeter wave, submillimeter wave and terahertz electric vacuum devices, and consists of a cathode block, a cathode emitting surface, an anode block and an electron gun package insulator The spiral ribbon electron injection cold cathode electron gun, periodic structure metal shell, collector, guiding magnetic field generator, the cathode emission surface is rectangular; the lower surface of the anode block is a slope inclined downward to the right, and the anode block is located on the upper right of the cathode block square; the metal shell with periodic structure is provided with electron injection channels that run through the left and right ends of the metal shell with periodic structure, and the middle part of the electron injection channel is provided with a high-frequency structure extending axially along the electron injection channel; the collector, electron injection channel, and cathode emitting surface are located on a straight line. The invention proposes a spiral ribbon-shaped electron injection cold-cathode electron gun with simple structure, long service life and excellent performance, which utilizes the interaction between the longitudinal velocity of the electron injection and the high-frequency field to hand over energy to realize electromagnetic radiation.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA

A gourd optical fiber for transmitting hollow light beams

The invention discloses a hoist optical fiber for transmitting hollow light beams and belongs to the technical field of optical fiber structure design. The hoist optical fiber includes an air fiber core, a fiber core anti-resonance single ring, a quartz supporting frame, a cladding air layer and a quartz cladding layer; the fiber core anti-resonance single ring forms an anti-resonant wall; and a fiber core is filled with air, so that the air fiber core can be formed; and the quartz supporting frame is adopted to support the fiber core anti-resonance single ring. The wall thickness of the fibercore anti-resonance single ring, the position of the joint point of the quartz supporting frame and the fiber core anti-resonance single ring, the size of the joint point and the wall thickness of the quartz supporting frame can be adjusted, and therefore, the hollow-core anti-resonance single ring used for blue-detuned atomic guide can be realized. The hoist optical fiber is small in transmission confinement loss and is simple in structure, and therefore, the hoist optical fiber can better transmit the hollow light beams, and the interaction area between light and atoms and the guiding efficiency of the atoms can be improved, the realization of an experiment of blue-detuned atomic guide can be benefitted, and a high-precision atomic interference gyroscope can be realized.
Owner:BEIHANG UNIV

Ultraviolet LED and detector homogeneous integrated chip and preparation method thereof

The invention provides an ultraviolet LED and detector homogeneous integrated chip and a preparation method thereof, and the homogeneous integrated chip comprises a substrate; a buffer layer; an LED device which is in a circular ring shape or a circular arc shape; and a detector positioned on the inner side of the LED device. According to the integrated chip, the circular-ring-shaped or circular-arc-shaped LED device and the detector located on the inner side of the LED device are adopted, the utilization rate of light emitted by the LED is increased in the direction, the interaction area of the LED and the side wall of the detector is increased under the condition that the area of an active area is fixed, and collection of the detector is facilitated. According to the integrated chip, a metal reflecting layer is arranged on the peripheral surface of the LED device, so that the light extraction efficiency and the electro-optical conversion efficiency of the LED device in the homogeneous integrated chip are greatly improved, the incident luminous flux received by a detector is increased, the sensitivity is improved, and the light dissipation of the integrated chip is effectively reduced. Therefore, the purpose of improving the signal conversion efficiency and the transmission speed of the homogeneous integrated chip of the ultraviolet LED and the detector is achieved.
Owner:CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI

Microglass hemisphere resonant gyroscope and wafer-level fabrication method thereof

The invention discloses a micro-glass hemispherical resonator gyro and a wafer level preparation method thereof. The micro-glass hemispherical resonator gyro comprises a composite structure substrate; a glass hemispherical resonator; a silicon non-planar electrode embedded in the composite structure substrate; and a packaging glass shell cover; wherein the glass hemispherical resonator consists of a hemispherical shell and a self-aligned column, and the inner surface of the hemispherical shell and the surface of the self-aligned column are coated with a metal conductive layer which is led out by connecting with a silicon leading out channel through another metal layer; the silicon leading out channel and the silicon non-planar electrode are led out on the back of the composite structure substrate by a metal wire. The preparation method includes wafer-level preparing the micro-glass hemispherical resonator by using a thermal foaming process, wafer-level preparing a glass-type silicon non-planar electrode by using a hot reflux process, assembling the glass hemispherical resonator and the glass-type silicon non-planar electrode, and performing vacuum packaging. The hemispherical resonator prepared by the invention has a diameter of 1-10mm, and has high electrode resonator alignment accuracy at the same time.
Owner:SOUTHEAST UNIV

A cold cathode radiation source based on spiral ring electron injection

The invention discloses a cold cathode radiation source based on spiral annular electron injection, which belongs to the technical field of microwave, millimeter wave, submillimeter wave and terahertz frequency band radiation sources, including an electron gun, an input structure, an output structure, a high frequency system, a collector, and an electron gun It includes a cathode, a first anode, a second anode, and a third anode. The cathode is fixed on the base of the electron gun, and the cathode is provided with carbon nanotubes for emitting electrons; the first anode is facing the carbon nanotubes, and the first anode, the second The anode and the third anode are arranged along the propagation direction of the electron beam; the electron gun, the high-frequency system, and the collector are connected in sequence, and the input structure and the output structure are connected to the two ends of the high-frequency system. The present invention utilizes the interaction between the spirally moving electrons and the high-frequency field, and then transfers the longitudinal energy of the spirally moving electrons to the high-frequency field to realize electromagnetic radiation, effectively solving the electron interception caused by the structure of the cold cathode grid-controlled electron gun , low pass rate, uneven emission current, ignition and a series of problems.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA
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