32results about How to "Implement multiple reflections" patented technology

The invention discloses preparation and application of an alpha-fetoprotein photoelectrochemical competitive immunosensor based on a double-sensitized structure. A sensing interface is constructed byusing titanium dioxide mesocrystals as a probe substrate and immobilizing an alpha-fetoprotein antibody (Ab), and using bismuth sulfide as an electrode substrate and immobilizing an alpha-fetoproteinantigen; the sensor with the double-sensitized structure is constructed by means of specific binding between an antigen and the antibody. An electrode modified with the alpha-fetoprotein antigen is placed in a mixed solution containing different concentrations of free antigen and a certain amount of labeled probes, and the free target antigen competes with the immobilized antigen for bonding to the labeled probes. Under the illumination condition, the electrode bonded with the probes can generate photocurrent with certain intensity, and the amplification of a current signal is realized by means of the double-sensitized structure. Furthermore, as the concentration of the free target material increases, the number of the probes bonded to the immobilized antigen decreases, and the photocurrent intensity is also reduced. Based on the phenomenon, a photoelectric analysis method for alpha-fetoprotein can be established.

The invention discloses a tail end disinfection and water purification assembly with a water quality monitoring function and an application method and belongs to the field of tail end water purification. The tail end disinfection and water purification assembly comprises a fluid cavity, a sealing part and an optical detection module, which are connected in sequence, wherein the sealing part is provided with a water inlet; the fluid cavity is provided with a water outlet; the optical detection module comprises an ultraviolet LED (Light Emitting Diode) module, an LED circuit board and a fluorescent detection module; the LED circuit board is of a hollow circular ring structure; the ultraviolet LED module is mounted on a circular ring of the LED circuit board; the fluorescent detection moduleis mounted at a hollow part of the LED circuit board. The tail end disinfection and water purification assembly disclosed by the invention has the advantages of small volume, low cost, simple structure, easiness for installation, high sensitivity and good sterilization effect; the invention further provides a calibration application method of the tail end disinfection and water purification assembly.

The invention discloses a wave absorbing integrated material of a gradient-pore type structure. The wave absorbing integrated material is composed of a base material, surface pores and a coating, and is characterized in that the pores are evenly formed in the surface of the base material, and the pore rate is increased along with the increase of the distance from the surface of the base material. The base material is carbon, or silicon carbide or a composite material formed by mixing the carbon and the silicon carbide, the depth of each pore is 1-10mm, the pores account for 5-40% of the area of the surface of the base material, the pores are parallel, or perpendicular to one another, or bent, the cross section of each pore is round, or irregular round, and the diameter of each pore is 0.1-1mm. The coating is a silicon carbide coating, or a silicon nitride coating, or an iron oxide coating, or a multi-layer coating or a trapezoid coating formed by two or more coatings, and the thickness of the coating is 10-100 micro meters. The wave absorbing integrated material has good wave absorbing performance and mechanical property.

The application provides a preparation method of graphene airgel, Fe 3 o 4 A graphene airgel and a preparation method thereof belong to the technical field of graphene airgel. The preparation method of the graphene airgel comprises: placing the annealed silicon dioxide porous framework at a temperature of 1100-1300° C. and growing graphene by a chemical vapor deposition method to obtain a pretreatment gel. The graphene airgel is obtained by removing the silica porous framework in the pretreated gel. Fe 3 o 4 A method for preparing the graphene airgel, comprising: mixing and reacting the graphene airgel and a dopamine solution under weak alkaline conditions to obtain the dopamine / graphene airgel. Fe was then obtained by alcohol thermal reaction and calcination 3 o 4 / Graphene airgel. The graphene airgel obtained by the above method has a special structure, fewer defects, and high electrical conductivity, so the obtained Fe 3 o 4 / Graphene airgel has better electromagnetic shielding performance.

The invention discloses a core-shell Ni / Co alloy and nitrogen-doped carbon-based wave-absorbing composite material and a preparation method thereof.The preparation method comprises the steps that firstly, a Ni / Co-MOF precursor is prepared through a simple hydrothermal reaction, and then the core-shell Ni / Co-C composite wave-absorbing material is obtained through high-temperature treatment in an argon inert environment; when the thickness of the composite wave-absorbing material is 3.5 mm, the frequency is 8.9 GHz, and the optimal effective wave-absorbing bandwidth (RL) value can reach-71.9 dB, RLlt; the effective wave-absorbing bandwidth of-10 reaches up to 16 GHz, S, C, X and Ku frequency bands are covered, and due to the fact that a core-shell structure with nickel and cobalt wrapped by carbon is formed, the material has good stability. The wave-absorbing material prepared by the method disclosed by the invention is environment-friendly, good in stability, relatively wide in wave-absorbing bandwidth, high in reflection loss, simple in process and suitable for large-scale production.

The invention provides a parabolic trough solar heat collector, which includes a support assembly, a reflection assembly, and a heat-absorbing assembly. Reflective mirror, the first flat reflective mirror and the second flat reflective mirror are respectively arranged on the reflective surface front ends of the first trough parabolic condenser and the second trough parabolic condenser; A strip-shaped or polygonal incident hole, the heat-absorbing component is arranged on the reflective component through the support component; the present invention has high light-gathering efficiency; the elliptical cavity is used as a black body cavity, the light reflection effect is good, the heat loss is small, and the process Low requirements are conducive to mass production; the outer surface of the heat collecting tube is coated with an anti-reflection coating to improve the heat collecting effect; through the cooperation of the parabolic concentrator and the plane reflector, the sun's rays can be fully utilized, which greatly improves the light and heat of the heat collecting component conversion rate.

The invention relates to a sound absorption and noise reduction device, and particularly relates to the sound absorption and noise reduction device. The sound absorption and noise reduction device comprises fixed frame plates, anti-collision sound-absorption assemblies and sound attenuation blocks, wherein each fixed frame plate comprises a rear sound absorbing plate, a left fixed plate, a right fixed plate and a plurality of sound wave reflection columns; the left end and the right end of each rear sound absorbing plate are respectively connected with the corresponding left fixed plate and the corresponding right fixed plate; the plurality of sound wave reflection columns are uniformly arranged on the front end surface of the corresponding rear sound absorbing plate; each sound wave reflection column comprises a support column and a polygonal pyramid; each polygonal pyramid is fixedly connected to one end of each support column and the other end of each support column is fixedly connected to each rear sound absorbing plate; the plurality of anti-collision sound-absorption assemblies are arranged between one corresponding left fixed plate and one corresponding right fixed plate; the quantity of the anti-collision sound-absorption assemblies is identical to that of the sound wave reflection columns. The sound absorption and noise reduction device has the beneficial effects thatan optimal sound absorption and noise reduction effect is achieved, and a buffer effect on the sound absorption and noise reduction device can be achieved when the sound absorption and noise reductiondevice is hit.

The invention discloses a preparation method of a mesoporous reduced graphene oxide absorbent, and belongs to the technical field of preparation of wave-absorbing materials. Comprising the following steps: 1) preparing a reducing agent aqueous solution with certain concentration; 2) weighing a certain mass of graphene oxide powder and adding the graphene oxide powder into a reducing agent water solvent; (3) heating the solution in the step (2) in an air dry oven; 4) after heating is finished, washing the product with deionized water to remove redundant reducing agent; and 5) carrying out freeze-drying treatment on the cleaned product, and grinding the freeze-dried product to finally obtain mesoporous reduced graphene oxide powder. According to the mesoporous reduced graphene oxide prepared by the method, multiple reflection of electromagnetic waves in the material is realized, multiple loss of the electromagnetic waves is realized under the action of a structural defect polarization center, and finally, the mesoporous reduced graphene oxide shows excellent electromagnetic wave loss performance.

The invention discloses a microwave ablation antenna based on a spiral slot structure. The microwave ablation antenna includes a conical ablation needle, a semi-rigid coaxial needle rod, the front end of the semi-rigid coaxial needle rod is connected to the end of the ablation needle, and several optimized spirals are formed on the outer conductor behind the connection. The slots radiate, and there are no or several annular slots behind the helical slots for impedance matching and radiation. The energy is transmitted in the semi-rigid coaxial line and radiated efficiently at the slots. The microwave ablation needle of the present invention has low microwave energy transmission consumption, and the energy radiates efficiently at the helical gap, mainly concentrated at the front end of the ablation antenna, effectively suppressing the backward radiation, thereby providing a new structure for minimally invasive or non-invasive microwave tumor treatment.

An II type superlattice photoelectric detector possessing an absorption enhancement structure and a manufacturing method thereof are disclosed. The manufacturing method comprises the following steps of carrying out molecular-beam epitaxial growth on a substrate so as to form an absorption enhancement layer; carrying out molecular-beam epitaxial growth on an upper surface of the absorption enhancement layer so as to form an absorption layer, wherein the absorption layer is an N structure II type superlattice structure; and completing manufacturing of the II type superlattice photoelectric detector possessing the absorption enhancement structure. In the invention, through adopting an N structure II type superlattice material as the absorption layer and simultaneously introducing the absorption enhancement layer, a device can acquire 80% of high quantum efficiency at a target wave length position and a good narrow bandwidth characteristic is embodied nearby a target wave length.

The invention discloses preparation and application of an alpha-fetoprotein photoelectrochemical competitive immunosensor based on a double-sensitized structure. A sensing interface is constructed byusing titanium dioxide mesocrystals as a probe substrate and immobilizing an alpha-fetoprotein antibody (Ab), and using bismuth sulfide as an electrode substrate and immobilizing an alpha-fetoproteinantigen; the sensor with the double-sensitized structure is constructed by means of specific binding between an antigen and the antibody. An electrode modified with the alpha-fetoprotein antigen is placed in a mixed solution containing different concentrations of free antigen and a certain amount of labeled probes, and the free target antigen competes with the immobilized antigen for bonding to the labeled probes. Under the illumination condition, the electrode bonded with the probes can generate photocurrent with certain intensity, and the amplification of a current signal is realized by means of the double-sensitized structure. Furthermore, as the concentration of the free target material increases, the number of the probes bonded to the immobilized antigen decreases, and the photocurrent intensity is also reduced. Based on the phenomenon, a photoelectric analysis method for alpha-fetoprotein can be established.

The invention relates to the technical field of chemical vapor deposition, and provides a femtosecond laser pre-dissociation device, which comprises a femtosecond laser dissociation module and a highRydberg atomic detection module, the femtosecond laser dissociation module and the high Rydberg atomic detection module are connected through a first pipe, and the first pipeline is provided with a valve. The invention further provides chemical vapor deposition equipment, which comprises a reaction gas supply source, a reaction cavity and the femtosecond laser pre-dissociation device. According tothe invention, the reaction gas is catalyzed and dissociated in advance by the femtosecond laser dissociation module, the reaction gas is dissociated into CH2 or CH before entering the reaction cavity, so that the production efficiency is greatly improved and the pollution to the air is reduced, the components of the gas such as H2, CH3, CH2 or CH and the like are analyzed by the high Rydberg atomic detection module and fed back to the femtosecond laser dissociation module for real-time adjusting the optimized power density and the time domain distribution so as to better control the processof the catalytic reaction.

The invention discloses a device and method for improving the performance of a photoacoustic spectrum trace gas sensor. The device includes a pulse laser, a laser collimation system, a thin film polarizer, a first rectangular prism, a Pockels cell, a photoacoustic pool, The second right-angle prism, preamplifier, control and data acquisition system and computer, the pulsed laser, laser collimation system, film polarizer, first right-angle prism, Pockels cell, photoacoustic cell, second right-angle prism The direction of beam propagation is set in sequence; a microphone is set in the photoacoustic pool; the microphone is connected to a preamplifier; the preamplifier is connected to a data acquisition system; the control is connected to a data acquisition system and a computer. The invention uses a Pockels cell to change the polarization state of laser light and two rectangular prisms to realize multiple reflections of light beams.

The invention provides a drop-out fuse with a wireless passive temperature sensing device. The drop-out fuse comprises a drop-out fuse body and a clamping sleeve mounted on the drop-out fuse body; a temperature sensor is mounted on the clamping sleeve; the temperature sensor comprises a metal casing, an RFID tag antenna and an RFID temperature measuring chip; the RFID tag antenna is mounted in themetal casing; the RFID temperature measuring chip is mounted on the metal casing and penetrates through the RFID tag antenna; the RFID tag antenna is internally provided with a mounting cavity; a metal inner ring is mounted in the mounting cavity; a plurality of sponge pads are arranged on the side, close to the RFID tag antenna, of the metal inner ring; the sponge pads are in contact with the RFID tag antenna; the metal inner ring is internally filled with a sponge filling layer; a metal rod is mounted in the metal inner ring; and a support plate is connected between the metal rod and the RFID tag antenna. According to the device, the recognition distance between a tag and an external reader is improved, the detection stability is good, and the detection data is reliable.

The invention discloses a wave absorbing integrated material of a gradient-pore type structure. The wave absorbing integrated material is composed of a base material, surface pores and a coating, and is characterized in that the pores are evenly formed in the surface of the base material, and the pore rate is increased along with the increase of the distance from the surface of the base material. The base material is carbon, or silicon carbide or a composite material formed by mixing the carbon and the silicon carbide, the depth of each pore is 1-10mm, the pores account for 5-40% of the area of the surface of the base material, the pores are parallel, or perpendicular to one another, or bent, the cross section of each pore is round, or irregular round, and the diameter of each pore is 0.1-1mm. The coating is a silicon carbide coating, or a silicon nitride coating, or an iron oxide coating, or a multi-layer coating or a trapezoid coating formed by two or more coatings, and the thickness of the coating is 10-100 micro meters. The wave absorbing integrated material has good wave absorbing performance and mechanical property.

The invention provides a solar power generation device, a solar power generation system and a control method thereof. The solar power generation system mainly comprises a solar energy absorption curved surface device, a solar energy absorption rod-shaped device, a photoelectric signal analysis system, a control system, a motor control module, a power consumption analysis and comparison system and a photoelectric sensor. The device can absorb and utilize the solar energy for multiple times by using the solar energy absorption curved surface device and the solar energy absorption rod-shaped device, and two tracking modes can be used according to weather conditions, so that the performance and the effect of conventional solar power generation devices are greatly improved.