331results about How to "Strong radiation resistance" patented technology

The invention discloses an underwater working robot which is characterized by mainly comprising a vehicle body module, a manipulator module or/and an underwater camera module, a functional component module and a control module, wherein the modules are completely isolated mechanically and electrically; the vehicle body module mainly comprises a six-wheel and six-drive sealing vehicle body, a vehicle body direct current servo motor, a vehicle body motor driver, a vehicle body underwater ultrasonic sensor, a vehicle body temperature pressure sensor, an underwater lighting lamp, a vehicle body waterproof plug, a vehicle body inflating valve and a vehicle body anti-radiation lead plate; the manipulator module mainly comprises a base, a waist part, a large arm, a small arm and a tail end executer; the base, the waist part, the large arm and the small arm are connected with one another through hollow joints; air is filled into a manipulator, and wires are arranged in the manipulator; the underwater camera module mainly comprises an underwater camera, an underwater camera lighting lamp and a bidimensional tripod; the functional component module mainly comprises a storage box, an underwater dust remover and an underwater cutter; and the control module mainly comprises a main control console and a hand-control box.

The invention belongs to the technical field of coatings, and particularly relates to a modified polyaspartic acid ester polyurea coating and a preparation method thereof. The coating comprises a component A and a component B, and the component A and the component B are respectively prepared and independently stored. The component A comprises isocyanate and/or a polymer of isocyanate; and the component B is prepared from the following substances in parts by weight: 20 to 75 parts of organic silicon and epoxy dual-modified polyaspartic acid ester resin, 5 to 35 parts of a filler, 0.1 to 5 partsof a pigment, 0.5 to 10 parts of an auxiliary agent and 5 to 30 parts of a solvent. An organic silicon unit and an epoxy unit are introduced into a polyaspartic acid ester resin structure to obtain anovel polyurea coating with excellent low-temperature flexibility, bonding strength, weather resistance and mechanical properties, and the coating is simple in preparation method, good in controllability, low in cost, capable of being prepared in batches and suitable for industrial production.

The invention belongs to the semi-conductor power device technical field. A SOI layer of the device is thinner (1to 2um); a grid oxide layer is thick (100 to 800nm); a grid field plate gets across a grid and extends above a drift region. An active expansion region positioned below the thick grid oxide layer and connected with a source region can be also arranged in the body of the device to assure the more effective formation of the whole device. The grid oxide layer of the invention is thicker, can bear high grid-source voltage and meet the need of a level displacement circuit; the SIO layer is thinner, can decrease the parasitic effect of the device and reduce consumption; through adding the grid field plate striding over the grid on the surface of the power device, the depletion of the drift region can be increased, the electric field peak value on the silicon surface at the tail end of the grid is decreased, the breakdown characteristic of the device is improved, further more the concentration of the drift region is helped to improve, and the on-state resistance of the device is decreased. The invention has the advantages of low parasitic effect, fast speed, low power consumption, strong radiation-resistant ability and so on, and is compatible with the standard process. By adopting the invention, various high-voltage, high-speed and low conducting loss devices of excellent performance can be produced.

The invention discloses an isolation transmission method of a switching power supply and a circuit thereof. Error signals sampled by a sampling circuit are sequentially output through an isolation circuit and a rectification filter circuit; the isolation circuit is composed of an isolation transformer, a driving triode and a pulse signal source, and the pulse The signal source outputs a pulse signal with a fixed frequency and pulse width, and the pulse signal is mixed with the error signal output by the sampling circuit through the driving triode in the primary winding of the isolation transformer, and the mixed signal is output from the secondary winding of the isolation transformer to the rectification filter circuit, It is rectified and filtered by a rectifying and filtering circuit to output a DC level signal whose amplitude is controlled by an error signal; the isolated transmission method and its circuit of the present invention have high transmission ratio for transmitting small signals, are less affected by temperature changes, and are resistant to radiation With the characteristics of strong capability, good stability and high derating, it is suitable for applications in high and harsh environments such as aerospace, military industry, and communications.

The invention relates to an integrated platform management system for the dredging of a trailing suction hopper dredger, in particular to an integrated platform management system based on a redundant network. The system comprises network switch, a server, a plurality of workstations, a PLC and a gateway which are respectively connected with a bottom ring network, and a top ring network; the PLC is used for realizing the control on the input and the output of field-working devices of a dredger, the gateway is used for realizing the conversion between the third protocol and the TCP/IP protocol, the PLC and the gateway are respectively connected with the bottom ring network through the network switch; the workstations for managing and monitoring data are connected with the top ring network through the network switch; and the server is connected with the bottom ring network and the top ring network through network switches arranged on the bottom ring net and the top ring net. The invention realizes the full sharing of the whole ship information resource and improves the system reliability.

The invention relates to fig natural face-nourishing and weight-reducing cold herbal tea and a preparation method thereof, belonging to face-nourishing and weight-reducing cold herbal tea and a preparation method thereof. The cold herbal tea is prepared from fig, tea, Chinese dates, yam, vine roots, poria extract, hawthorn, alginate polysaccharide, soybean isoflavone, lotus leaf flavone, gypenosides, curcumin and white granulated sugar through the steps of crushing, extraction, preparation and the like. The cold herbal tea has the functions of beautifying the features, nourishing the face, reducing fat, losing weight, augmenting the breasts and getting sexy; and the cold herbal tea has the peculiar fruit tea taste of fig and is sour and sweet.

The invention provides an integrated power device on a silicon on insulator (SOI) layer for negative supply voltage, belonging to the field of semiconductor power devices. The integrated power device on the SOI layer for the negative supply voltage is characterized in that the SOI layer is integrated with at least two or three high-voltage devices of an n-type lateral insulated gate bipolar transistor (nLIGBT), a p-type laterally diffused metal oxide semiconductor (pLDMOS) and an n-type laterally diffused metal oxide semiconductor (nLDMOS), and also can be integrated with a low-voltage metal oxide semiconductor (MOS) device; buried oxide layers and dielectrically isolated areas connected with the buried oxide layer are used to realize the complete isolation among the different devices; a conventional local oxidation of silicon (LOCOS) technology or a shallow trench isolation technology is adopted for realizing the dielectrically isolated area; the SOI layer is 0.5-3mu m in thickness; and the dielectric electric-field strength of the thick gate oxide layer of the high-voltage nLIGBT and nLDMOS devices is less than 5*106V/cm so as to meet the requirements of the high-voltage integrated circuit of the negative supply voltage for high voltage resistance between the grid electrodes and source electrodes of the devices. The integrated power device on a SOI layer for the negative supply voltage has the advantages of small parasitic effect, fast speed, low power consumption, strong irradiation resistance and the like, realizes compatibility of the high-voltage devices with the low-voltage devices, and meets the requirements of the working environment of the negative supply voltage. The integrated power device on a SOI layer for the negative supply voltage is used to manufacture a plurality of high-voltage, high-speed and low conducting-loss power devices with good performances, and is used for the high-voltage application of the negative supply voltage.

The invention discloses a polysulfonamide fiber-containing dry mica tape, which comprises a mica layer, a bonding agent layer and a reinforcing material layer in sequence from the top to the bottom, wherein the mica layer consists of mica powder, polyphenyl sulfone p-phenylene formamide fiber and a bonding agent; the content of the polyphenyl sulfone p-phenylene formamide fiber accounts for 2-50 percent by weight of total mass of the mica layer; and the content of the bonding agent accounts for 2-25 percent by weight of the total mass of the mica tape. The invention has the remarkable technical advantages that: 1, the dry mica tape has high permeability; in the presence of the polysulfonamide fiber, a relatively loose structure and gaps with certain continuity can be formed in an insulating layer, so that the permeability of the dry mica tape can be improved, and impregnation of impregnated resin is better facilitated; 2, heat-resisting organic fiber in a certain proportion is added into the mica layer, namely, the mechanical strength of the mica layer is improved; and 3, heat-resisting organic fiber used in the mica tape is superior to Nomex fiber on the aspects of heat resistance, impregnating performance, radiance resistance, high-temperature size stability, flame retardance and chemical stability, has excellent electrical insulating performance simultaneously, and is more suitable for manufacturing a mica type with a motor in an insulating way than Nomex fiber.

The invention relates to 2,5-di-tert-butyl-terminated poly(ether-ether-ketone) (PEEK), and a preparation method thereof. The end-capped poly(ether-ether-ketone) provided by the invention has advantages of easily controllable molecular weight, high heat resistance, good chemical stability, radiation resistance, good toughness, and the like.

The system includes control rod assembly, chain wheel-link belt, current vortex sensor, precision lead screw-nut assembly and body to be measured. The said precision lead screw-nut assembly includes precision lead screw, nut and support. Precision lead screw is connected to chain wheel, and the body to be measured is fixed on the nut. The current vortex sensor includes probe of sensor, signal transmission cable and preamplifier. Sealed penetration piece welded to pressure borderline of a loop is setup in middle of the signal transmission cable. Probe of sensor fixed on the said support is corresponding to the body to be measured. The advantages are high measurement accuracy, fast speed, stable operation and easy of maintenance.

The invention relates to the domestic chemical field and the pharmaceutical industry, in particular to a moisture absorption humectant of carboxymethyl mycose and a method for preparing the same. The moisture absorption humectant of carboxymethyl mycose uses carboxymethyl mycose as the moisture absorption humectant. The preparation method is as follows: according to the mol ratio of between 1:4 and 6, mycose undergoing swelling by the alkali isopropyl alcohol solution and chloroacetic acid are mixed and reacted in the excessive alkali isopropyl alcohol solution at a temperature of between 30 and 60 DEG C for 2 to 5h, and the mixture is subjected to suction filtering and drying so as to obtain the moisture absorption humectant of carboxymethyl mycose. In the invention, carboxymethyl mycose is obtained by the effective synthetic method, and the production cost is only slightly increased, but the moisture-absorption and moisture-retention performances are obviously improved; as a highly efficient moisture-absorption and moisture-retention factor, carboxymethyl mycose obtained by the method of the invention is hopeful to replace hyaluronic acid to be used in cosmetics.

Heparan sulfate originating from rat tissue and its production are disclosed. The procedures is carried out by homogenizing rat tissue, degreasing, hydrolyzing by protease, hydrolyzing by alkali, deproteinizing, centrifugalizing, taking out purified liquor, dialyzing, depositing dialyzate by cetylpyridinium chloride, hydrolyzing by RNase and chondroitinase ABC, and separating by ionic exchanging column. It has special raw material, better product anticoagulant and antiradiation performances, and various Heparan sulfate. It can be used for research on medicinal molecular model structure and protein interaction. I

The invention relates to an electromagnetic wire for a new energy automobile driving motor. The electromagnetic wire comprises a flat wire and an insulating layer. The insulating layer comprises a first polyimide layer coated outside the flat wire, a second polyimide layer coated outside the first polyimide layer, and a polyether-ether-ketone resin layer coated outside the second polyimide layer.The fillet radius of the flat wire is 0.25-0.3 mm. The first polyimide layer is formed by coating polyimide paint with the viscosity thereof to be 12-18 Pa*s at the temperature of 30 DEG C. The secondpolyimide layer is formed by coating polyimide paint with the viscosity thereof to be 5-10 Pa*s at the temperature of 30 DEG C. The electromagnetic wire disclosed by the invention has the advantagesof high-frequency pulse partial discharge resistance, ultrahigh voltage breakdown resistance, excellent electric heating resistance, mechanical property, chemical resistance, hydrolysis resistance, friction resistance and wear resistance, good toughness and strong radiation resistance.

The invention provides a carotenoid high yield strain and application thereof, and relates to the field of microbe fermentation and metabolite thereof. The carotenoid high yield strain is Deinococcus wulumuqiensis R12M, and the preservation registration number is CCTCC No: M2014099. The invention further provides the application of the strain to the field of preparation of carotenoid. Compared with Deinococcus wulumuqiensis sp.nov. and Deinococcus radiodurans DSM 20539T, the wulumuqiensis R12M, provided by the invention, has better radiation resistance and carotenoid production property, and can be applied to production of natural pigment and natural anti-oxidant.

The invention provides a polyimide/modified natural melanin nanocomposite. Polyimide in the nanocomposite is connected with natural melanin through chemical bonds, and the natural melanin surface is grafted with a silane coupling agent. The invention further provides a preparation method of the nanocomposite. Natural melanin is subjected to surface modification with the silane coupling agent (APTES), and then the modified natural melanin and polyimide in different proportions are composited, and the nanocomposite is formed. A matrix of the polyimide/modified natural melanin nanocomposite does not degrade in a photocatalytic process and is resistant to strong ultraviolet radiation, so that the mechanical property and heat resistance are outstanding, and the service life is longer.

The invention is concerned with production method of high transmission ration window layer zinc selenium sulfur to GaAs sun energy batteries structure in type of n+/p. Take p type of GaAs or germanium mono crystal slice as underlay. Use metal organic compound vapor deposition and molecule bundle lift-off growth technology to develop sun energy batteries lift-off slice and extend to the project section of the top batteries. Extend a layer of zinc selenium sulfur material of the project section as window layer and extend impure GaAs cap layer on the window layer and get the batteries lift-off slice. Braising plating gold germanium nickel/ gold positive electricity on the upper face of lift-off slice and produce titanium/ gold negative electricity on the surface of high impure GaAs of the bottom of lift-off slice. Fret cap layer, alloy, braising plating reducing reflection film, fret table-board, encapsulate the batteries, fix device of gathering light, cooling device and the equipment for tracking the sun to produce the batteries.

The invention relates to a radiation-resistant high-performance silica fiber and a preparation method thereof. The radiation-resistant high-performance silica fiber provided by the invention is composed of a silica glass material based fiber core, an inner cladding and an outer cladding, wherein the fiber core contains 0-2000ppm of hydroxyl group and 0-1000ppm of fluorine, the inner cladding is doped with 10000-20000ppm of fluorine, and the outer cladding is silica glass containing 1000-6000ppm of fluorine. The radiation-resistant high-performance silica fiber provided by the invention can beprepared by adopting a combined process method of VAD (vapour axial deposition) and MCVD (modified chemical vapour deposition) or PCVD (plasma chemical vapour deposition), namely a core layer is prepared by adopting VAD firstly, and different deposition and vitrifaction technological conditions are controlled to obtain core rods with different hydroxyl group and fluorine contents, the inner cladding doped with fluorine is prepared by adopting an MCVD or PCVD process, a sleeve containing a low-refractive index inner cladding is obtained, and then the core rods and the obtained sleeve are fusedinto a prefabricated rod or combined into a prefabricated rod assembly, and finally direct wire drawing is carried out to obtain the silica fiber. The silica fiber can be used for information transmission of a communication system, especially can be used as both a radiation-resistant optical fiber to guarantee long-distance communication and an energy transmitting optical fiber for transmitting ultraviolet light under the radiation environment.

The invention relates to the field of waterproof coiled materials and discloses a polyethylene double-side composite waterproof coiled material which is composed of, in a compositing manner, an inner layer 1, an outer layer 3 and a middle layer 2. The inner layer is composed of a polypropylene yarn filament non-woven cloth, the outer layer is composed of a polyester filament yarn non-woven cloth, and the middle layer is a sheet material prepared from polyethylene resin, wherein the middle layer is composited between the inner layer and the outer layer and the thickness of the middle layer is larger than those of the inner layer and the outer layer. The coiled material allows cold construction and cement wet pavement, is convenient to use, is strong in adhesion force, is good in stability, is high in tensile strength and ductility, is good in low-temperature flexibility and heat resistance, and is anti-corrosion and anti-radiation. The coiled material is widely used in waterproofing treatment on various roofs in industry and construction industry, and in waterproof engineering on basements, reservoirs, dams, highway tunnels, viaduct bridges, railway tunnels, air-raid shelter, grain depots, garbage stations, wastewater treatment plants and the like.

The invention discloses a cable housing device. The cable housing device comprises a wire spool, a rotating member, a winding member, a fixed gear, a planetary gear, a driving motor, a transmission mechanism, a driving wheel, a swing arm and a connecting rod, wherein the fixed gear and the rotating member are arranged on the end face of the wire spool, respectively; the driving motor and the winding member are fixed at two ends of the rotating member, respectively; the planetary gear is connected to an output shaft of the driving motor and is engaged with the fixed gear; the driving wheel is rotatably mounted on the winding member; one end of the swing arm is eccentrically pivoted to the driving motor; two ends of the connecting rod are pivoted to the winding member and the swing arm, respectively; the driving wheel rotating drives the other arm end of the swing arm to swing up and down; the transmission mechanism is connected between the other output shaft of the driving motor and the driving wheel; and the driving motor drives the driving wheel to rotate by virtue of the transmission mechanism. According to the cable housing device, two movements, rotation and swing, of the swing arm are synchronized by combining gear transmission and connecting rod transmission, so that a cable can be uniformly arranged. Moreover, electric members are not needed, and the cable housing device is relatively strong in irradiation resistance and long in service life.