34results about How to "Good for a wide range of applications" patented technology

The invention discloses a graphene aerogel material and a preparation method thereof. The preparation method comprises the following steps: (1) preparing a precursor solution, namely mixing graphene oxide with a framework filler, and stirring uniformly to obtain the precursor solution; (2) preparing graphene hydrogel, namely adding a catalyst into the precursor solution, stirring uniformly, then pouring into a mold containing reinforcing fibers, sealing the mold, and heating the mold for reaction, thereby obtaining fiber reinforced graphene hydrogel; (3) preparing graphene ketone gel, namely putting the graphene hydrogel into an acetone solution to perform solvent replacement so as to obtain the graphene ketone gel; and (4) preparing graphene aerogel, namely taking out the graphene ketone gel, and drying to obtain a fiber reinforced graphene aerogel material. The invention also relates to the graphene aerogel material prepared by the method, and the graphene aerogel material is low in heat conductivity and high in strength, and can be used as a high-temperature heat insulating material.

The invention relates to a graphene/silica composite aerogel material and a preparation method thereof. The preparation method comprises the following steps: 1, preparing a graphene oxide/silica system hydrogel; 2, preparing a graphene oxide/silica system alcogel; 3, preparing graphene oxide/silica composite aerogel; and 4, preparing the graphene/silica composite aerogel material. The graphene/silica composite aerogel material prepared through the preparation method has good high-temperature hydrophobic performance, and can tolerate a temperature of 400 DEG C or above, so the application range of silica composite aerogel is enlarged.

The invention discloses a multi-spectrum invisible anti-counterfeiting identifier and a detection device thereof, and a detection method thereof. The multi-spectrum invisible anti-counterfeiting identifier comprises an infrared absorption anti-counterfeiting pattern region made of infrared absorption ink, a macroscopic region made of common ink, and an ultraviolet excitation anti-counterfeiting pattern region made of ultraviolet excitation ink. The detection device is composed of a multi-spectrum micro-lens imaging unit and an image analysis unit; the multi-spectrum micro-lens imaging unit consists of a multi-spectrum micro-lens imaging lens, a mounting bracket, a full-spectrum light source, a CMOS sensor, and a focusing mechanism; the multi-spectrum micro-lens imaging lens is installed on the mounting bracket; the full-spectrum light source is installed on the mounting bracket; and the CMOS sensor is installed on the focusing mechanism. The multi-spectrum invisible anti-counterfeiting identifier has characteristics of good multi-anti-counterfeiting capability, high anti-counterfeiting level, high security and reliability, and good anti-counterfeiting effect. The anti-counterfeiting technique has the important application values in bill, currency, certificate, commodity, military, and security information fields.

The invention discloses a method for separating enriching metallic and semiconductor carbon nano-tubes from single-walled carbon nano-tubes. The method of the invention is that: first, purified carbon nano-tubes of 1 weight account that waits for separation and 0.05 to 2 weight accounts of separating accelerator are taken to be added into organic solvent for ultrasonic mixing and lead the separating accelerator to sufficiently adsorb the specific carbon nano-tube, then liquid and sediments are separated, carbon tubes that are suspended in the liquid are separated, and products of enriching metallic carbon-tubes are acquired; next, 1 weight account of sediment and 0.05 to 2 weight accounts of the separating accelerator are taken to be added into the organic solvent for ultrasonic mixing processing, then sediments and liquid are separated, carbon tubes that are suspended in the liquid are separated, and products of enriching semiconductor carbon tubes are acquired.

The invention discloses a self-assembly three-dimensional copper Raman enhanced substrate, and a preparation method and application thereof, and belongs to the field of Raman spectrum analysis. The raw material used by the method is relatively cheap copper; the application cost of an SERS (Surface Enhanced Raman Scattering) substrate is greatly reduced. Carbon points are used for replacing ordinary organic molecules to prepare a copper self assembly structure; the obtained copper substrate does not need special protection; the special treatment is not needed; the direct use can be realized. The prepared self-assembly three-dimensional copper can be stored for a long time in the air. The prepared self-assembly three-dimensional copper has a great number of SERS active sites; the detection limit on probe molecules (4-ATP) is 10<-8> mol/L. The prepared self-assembly three-dimensional copper Raman enhanced substrate has rich hot spots and ultrahigh stability; in addition, in the use process, any pretreatment is not needed; inactivation cannot occur after the placement in the normal temperature air for several months; the large range application of the Raman substrate and the large-range application of the Raman analysis technology are facilitated.

The invention relates to a method for identifying a face of a living body. The method for identifying the face of the living body comprises the following steps of (1) collecting the face image information; (2) generating at least one group of face image sequences from the face image information; (3) extracting the human face local features from the at least one group of human face image sequences;(4) screening out a low-dimensional feature vector of the face image information from the face local features; (5) inputting the low-dimensional feature vector into a trained classifier to carry outliving body face image recognition; and (6) outputting an identification result. Correspondingly, the invention further relates to a system for identifying the face of the living body. According to the method and the system provided by the invention, the face of the living body can be quickly and accurately identified, and the high requirement of the embedded equipment for the real-time performance can be met.

The invention discloses a colloidal gold test strip, which comprises an absorption pad, a nitrocellulose membrane, a gold-labeled pad and a sample pad that are sequentially laminated and pasted on a plastic lining board. The cellulose nitrate membrane is provided with a detection line and a quality control line; the gold-labeled pad is coated with colloidal gold-labeled monoclonal antibodies capable of identifying sulfonamides; the detection line is coated with a sulfonamide coating antigen; and the quality control line is coated with a goat or rabbit anti-rat IgG. The invention also discloses a usage method of the colloidal gold test strip and application of the colloidal gold test strip to detection of residues of sulfonamides. The colloidal gold test strip provided by the invention can be used for detecting residues of sulfonamides in tissue samples, such as milk, pork, chicken, beef, lamb, fish, shrimp, pork liver, chicken liver, egg and honey, etc.; and the colloidal gold test strip provided by the invention can simultaneously detect 16 sulfonamides, and has characteristics of high sensitivity, strong specificity, simple operation, fastness, accuracy and low cost.

The invention discloses a cooker with temperature measurement function. The cooker comprises a cooker base, heaters and a pan lining, wherein the heaters and the pan lining are on the cooker base; a temperature sensing LC oscillating circuit for sensing the temperature of the pan lining is arranged on the pan lining; a temperature identification module is arranged on the cooker base; the temperature sensing LC oscillating circuit comprises an oscillating coil L1 and a temperature sensing capacitor CT; the temperature identification module comprises a controller and an exciting/sensing coil L2; an exciting drive circuit, a state switching circuit and a frequency detection circuit are connected onto the exciting/sensing coil L2, and the exciting/sensing control of separated temperature measurement of the cooker is achieved. The cooker with the temperature measurement function is simple and convenient in arrangement; the temperature sensing LC oscillating circuit is in contact with an object to be measured; the sensitivity is high; the temperature identification module is not in contact with the object to be measured; the service lives of chips and components on the temperature identification module are easily prolonged.

The invention discloses a circuit board with a heat conduction structure. The circuit board comprises multiple layers of circuit boards, and is characterized in that at least one support body is mounted between every two adjacent layers of the circuit boards, so that a cavity is formed between the two layers of the circuit boards; the cavity is filled with a heat conduction medium; and the heat conduction medium and the support body form a heat conduction structure. According to the structure, heat dissipation of the circuit board is achieved through the heat conduction structure with a smallsize, so that lighting and thinning heat dissipation requirements of a small electronic device are met; and furthermore, the heat conduction structure is added without changing a circuit layout of theexisting circuit board, so that the design cost of the circuit board is not increased. The invention further discloses a fabrication method of the circuit board with the heat conduction structure. The fabrication method is simple to operate; and the fabricated circuit board has good heat dissipation characteristics.

The invention discloses a ceramizable phenolic aerogel and a preparation method thereof. The preparation method comprises the following steps: preparing a precursor solution, uniformly mixing the precursor solution, a ceramizable filler and an acid catalyst, pouring the mixture into a mold, and obtaining ceramizable phenolic aldehyde hydrogel after gelation and aging; demoulding the ceramizable phenolic aldehyde hydrogel, and then putting the ceramizable phenolic aldehyde hydrogel into a drying oven to carry out normal-pressure stepped heating drying, so as to prepare ceramizable phenolic aldehyde aerogel; the ceramizable phenolic aerogel disclosed by the invention has the advantages of lower heat conductivity coefficient, lower density, higher compression strength, higher residual carbon rate after high-temperature carbonization treatment, low cost, simple process and the like, and has a wide application prospect.

The invention relates to C-axis pore-forming graphite, an apparent particle structure of the C-axis pore-forming graphite is formed by basic layered structure units, the basic layered structure units have pores in the C-axis direction, and the C-axis pore-forming graphite is used as an embedded electrode active material and has high rate performance.

The invention discloses silicon carbide porous ceramic and a preparation method thereof. The preparation method comprises the following steps: mixing and ball-milling fine stone ore and carbon powder; pressing and molding a mixture, and heating the mixture in a constant-temperature carbon tube furnace for continuous operation at 1850-2000 DEG C to generate silicon carbide whiskers; carrying out wet mixing and ball milling on the silicon carbide whiskers, short carbon fibers, monatomic silicon and a binder by taking absolute ethyl alcohol as a ball milling medium; drying to obtain powder; and sieving the powder, heating and extruding to form a profile, putting the profile into a high-temperature vacuum hot isostatic press, gradually heating to 1900 DEG C, filling gaseous silicon while performing nitrogen protection, and preserving heat for 3 hours to obtain the silicon carbide fiber porous ceramic body. According to the invention, the chopped carbon fiber and the monatomic silicon are subjected to in-situ reaction sintering, and whisker growth and mutual bridging growth of the silicon carbide whisker in the heating process are realized, so that the green body is sintered into the densified silicon carbide porous ceramic with constant volume.

The invention relates to an information interaction system and method of an absolute type grating ruler, belongs to the measurement field of the absolute type grating ruler,, and aims at solving the problem that a present grating ruler collection system is low in information interactivity. A communication protocol conversion interface and the absolute type grating ruler transmit data to each other, the communication protocol conversion interface outputs information to an information collection module, and configuration information is input to the communication protocol conversion interface; an information reading module transmits information of the absolute type grating ruler to an information analysis module; an information configuration module receives configuration information of the information analysis module, and transmits the configuration information to the absolute type grating ruler; an information analysis module makes a request for accessing the absolute grating ruler to the information reading module, the information reading module reads information of the absolute type grating ruler, and transmits the information to the information analysis module, the information analysis module analyzes the data and configures the transmission configuration parameter of the information configuration module, and the parameter configuration module transmits configuration parameters to the absolute type grating ruler; and an analog signal conversion module receives analog increment signals of the absolute grating ruler, and outputs the analog increment signals to an oscilloscope.