30results about How to "Meet the application" patented technology

The invention discloses an intelligent electrical equipment environment monitoring system based on cloud computing and big data analysis. The system comprises a cloud server, an intelligent master control device, monitoring devices and communication equipment communicating with the cloud server, wherein the monitoring devices are used for acquiring related data of an electrical equipment environment and transmitting the data to the intelligent master control device; the intelligent master control device is used for controlling the monitoring devices and transmitting the data received from the monitoring devices to the cloud server; the cloud server is used for receiving and storing the related data of the electrical equipment environment; a user accesses the cloud server through a mobile phone or a computer and then controls the master control device and the monitoring devices remotely. The system depends on cloud computing to perform big data analysis on online meteorological information, real-time data and historical data, intelligently monitors the monitoring devices of all nodes, evaluates the monitoring effectiveness, analyzes potential risks effectively and solves problems by which people are puzzled for many years about outdoor electrical equipment microenvironments, online micrometeorology monitoring, real-time intelligent control and the like.

The invention relates to a balise message detection method. The method comprises the following steps that: firstly, an existing balise transmission module (BTM) vehicle-mounted antenna emits a power signal to a ground balise in real time; and when being activated by the power signal, the ground balise sends out message data stored in the ground balise; and secondly, at least one small receiving antenna is arranged at a place at a distance no less than 50 millimeters in front of or in rear of the existing BTM vehicle-mounted antenna; to be specific, the BTM vehicle-mounted antenna receives the message data and sends the data to a BTM host for parsing, and the message data that have been parsed by the BTM host are sent to a train controlling computer; and the small receiving antenna receives the message data and sends the data into a vehicle-mounted receiving decoding device for parsing, and the message data that have been processed by parsing by the vehicle-mounted receiving decoding device are sent to a third-party balise message reading terminal for application. The provided method has the advantage that: the method is independent to the existing balise message device of the train, so that independent reading and application of the balise message by the third party can be realized.

The invention provides a tangential steel magnet permanent magnetism synchro motor, which belongs to the permanent-magnet motors. The motor comprises a stator consisting of a stator core (1) and an armature winding (2), and a rotor consisting of a tangential magnetization permanent magnet (3), a North Pole magnetizer of the rotor (4), an S-pole magnetizer (5) of the rotor, a fixed cover (7) arranged on a driving end, a fixed cover (8) arranged on a non-driving end (8), an axis of rotation (6) and a bearing (9). The rotor and the stator are arranged in a front end cover (10), a back end cover (11) and an enclosure (12). The axial length of the tangential magnetization permanent magnet (3), the North Pole magnetizer of the rotor (4) and the S-pole magnetizer (5) of the rotor (5) is larger than the axial length of the stator core (1); the end connection length can be used effectively. Due to the axial magnetic concentration action of the rotor core, the air-gap induction of the motor is increased; and the power density of the permanent-magnet motor is further increased. The utility model is highly valuable in application in aerospace and civil occasions requiring high performance.

The invention relates to eco-friendly safe reducing agent-based graphene and its preparation method and application. The preparation method comprises preparation of graphite oxide and preparation of graphene. The preparation method comprises preparing graphite oxide from natural graphite as a raw material by a Hummers method using concentrated sulfuric acid (H2SO4), sodium nitrate (NaNO3) and potassium permanganate (KMnO4) as oxidants, carrying out ultrasonic dispersion to strip the graphite oxide so that a stable graphite oxide dispersion liquid is obtained, and reducing the graphite oxide at the room temperature through L-ascorbic acid as a reducing agent and ammonium hydroxide as a stabilizer so that graphene is obtained, wherein through control of graphite oxide reduction reaction time and a ratio relationship of graphite oxide and L-ascorbic acid, different graphene materials are obtained. The method has the characteristics of simple and safe system, good biocompatibility and stable product physical and chemical properties. The product prepared by the method can meet the needs of biomedical application.

The invention discloses an upper power tube conduction time timing circuit with a wide input voltage range. The circuit comprises an input voltage sampling module, a timing current output module and atiming module. The input voltage sampling module is used for sampling an input voltage of the COT switching power supply and converting the input voltage to obtain a sampling current. The timing current output module generates timing current according to the sampling current; and the timing module charges the timing capacitor by using timing current after an upper power tube of the COT switchingpower supply is conducted, compares voltage on the timing capacitor with reference voltage by using the comparator, generates a turn-off signal of the upper power tube when the voltage on the timing capacitor is greater than the reference voltage, and discharges the timing capacitor. The input voltage information of the input COT switching power supply is reflected to the conduction time of the upper power tube, so that the COT switching power supply obtains the switching frequency positively related to the output voltage, the efficiency of the COT switching power supply at low input voltage can be effectively improved, and the output ripple of the COT switching power supply at high output voltage can be reduced; and the upper power tube conduction time timing circuit has a wide input voltage range and high mirror image precision.

The invention discloses a method and a device for extracting a time sequence trend. A to-be-extracted time sequence is acquired; based on the correlation between an adaptive IMF (Intrinsic Mode Function) component and the to-be-extracted time sequence and RRMSE values of the adaptive IMF component and the to-be-extracted time sequence, the optimum white noise amplitude is calculated; according to the optimum white noise amplitude, the optimum set mean is calculated; based on the optimum white noise amplitude and the optimum set mean, a complementary set empirical mode decomposition method is used for decomposing the to-be-extracted time sequence, an IMF component and residual components are obtained, and the trend sequence for the to-be-extracted time sequence is extracted. According to the to-be-extracted time sequence, the optimum white noise amplitude is calculated adaptively; based on the optimum white noise amplitude, the optimum set mean is calculated; the optimum white noise amplitude and the optimum set mean serve as CEEMD decomposition parameters; and compared with manual setting, the white noise amplitude and the set mean are calculated adaptively, and carious application conditions can be met.

The invention discloses a skeletal muscle stem cell serum-free medium and a preparation method and application thereof. The skeletal muscle stem cell serum-free medium, with the pH value ranging from 7.4 to 7.4, comprises DMEM(dulbecco's modified eagle medium) / F12, serum replacement, cytokines, vitamins, amino acid, recombinant human insulin, mepiquat chloride and 6-chondroitin sulfate. The invention further discloses the preparation method of the skeletal muscle stem cell serum-free medium. Specifically, the serum replacement refers to animal-free component which is defined, thus, serum caused pathogenic risk and instability of different batches and the like are avoided. The skeletal muscle stem cell serum-free medium is applicable to human skeletal muscle stem cell primary culture and scaled amplification culture and has the advantages of high purity, quick cell proliferation, high expansion efficiency, capability of realizing steady passage of at least 20 generations and the like. In addition, the skeletal muscle stem cell serum-free medium effectively improves skeletal muscle stem cell expansion efficiency and purity and can serve as an in-scale high-quality skeletal muscle stem cell culture system to meet requirements for clinical research and application.

The invention provides a multi-data-rate network recording method and device. The method comprises the following steps: obtaining network flow data collected by an internet-of-scene server, wherein the network flow data is a binary code based on an internet-of-scene protocol; analyzing the network flow data according to an internet-of-scene coding and decoding protocol, and extracting video data and audio data from the network flow data; synthesizing the video data and the audio data to obtain a plurality of multimedia files corresponding to different specific data rate and / or specific formats; and sending the plurality of multimedia files to the internet-of-scene server. The multi-data-rate network recording method and device have higher compatibility for formats of the received video and audio data, thereby greatly improving dynamic scalability of parallel recording number, and meeting use of video resources at different scenes; and the method and device have high flexibility.

The invention relates to tissue culture and reproduction method of heavy metal super enriched plant of thlaspi caerulescens and comprises the following steps: disinfected stem tip / stem node of the thlaspi caerulescens with the length of 0.8-1.2cm and leaves or disinfected seedling thereof with bud and stem is inoculated to starting culture medium to be cultivated into multiple bud seedling; next the multiple bud seedling is inoculated to enrichment medium to be cultivated into dense multiply bud; then the obtained dense multiply bud is placed into basic culture medium for seedling strengthening; thereafter the multiply bud is transferred to rooting culture medium for rooting; then the multiply bud is transferred to culture medium of Grant solution for water cultivation for seedling strengthening; finally the strengthened seedling is transferred to garden matrix for planting and the tissue of thlaspi caerulescens thereby is obtained. The method not only can exclude affects of external conditions, and can be carried out all the year around, save culture land and reduce production cost, but also can obtain a plurality of strong seedling in short term and be applied in large-scaled production.

The invention provides a nucleic acid extraction kit for an excrement sample, a preparation method and an extraction method, and relates to the technical field of biology, the kit comprises protease K, a primary lysis buffer solution and a lysis binding buffer solution; the concentration range of the protease K is 10-30 mg / mL; the primary lysis buffer solution comprises Tris-HCl with the pH value of 6.0 to 8.550 to 200 mM, SDS with the concentration of 0.5 to 30 percent (w / v) and EDTA with the concentration of 1 to 10 mM, and the pH value of 8.0 to 9.0; the lysis binding buffer solution is prepared from 50 to 200mM of Tris-HCl, 1 to 15M of guanidine hydrochloride, 1 to 10mM of EDTA (Ethylene Diamine Tetraacetic Acid), 0.1 to 5 percent of TritonX-100 and 0.1 to 5 percent of Tween-20, and the pH (Potential of Hydrogen) of the lysis binding buffer solution is 7.0 to 8.0. The DNA nucleic acid extracted and purified by the kit is high in yield and good in purity, and the problem that the preservation time of the DNA extracted from the excrement sample is short is solved.

The invention relates to a microwave-assisted preparation method for spherical transition metal and zirconium diphosphonate in one step. The microwave-assisted preparation method comprises the following steps: preparing a water-soluble transition metal salt, a water-soluble zirconium, a water-soluble phosphoric acid source and water-soluble fluoride into an aqueous solution respectively, and mixing; then, performing microwave-assisted heating, centrifuging, washing and drying to obtain transition metal and zirconium diphosphonate. The microwave-assisted preparation method is simple, convenient to operate, less in time consumption and high in efficiency; the prepared transition metal and zirconium diphosphonate are regular in morphology, and can be used as a catalyst, an ion exchange material, an antibacterial material and the like without being roasted at a high temperature.

The invention relates to a target phospholipid covered fluorescent / nuclear magnetic dual-mode probe as well as preparation and application. The preparation comprises the following steps: dissolving distearoyl phosphoethanolamine-polyethylene glycol (DSPE-PEG) and a targeting molecule-DSPE (P-DSPE) into a chloroform or cyclohexane solution; adding zinc-doped ferroferric oxide nanoparticles (Zn-Fe3O4) to enable the mass ratio of phospholipid to the Zn-Fe3O4 to range from (1 to 1) to (10 to 1); putting a mixed solution into a round bottomed flask; adding a proper amount of ultrapure water and uniformly mixing by ultrasounds; carrying out rotary evaporation on the mixed solution at 40 DEG C to 80 DEG C for 10min to 30min; putting the zinc-doped ferroferric oxide nanoparticles adsorbed by magnetism into the bottom of a container; removing supernatant and removing uncovered phospholipid; finally, obtaining target phospholipid covered nano ferroferric oxide; preparing the target phospholipid covered fluorescent / nuclear magnetic dual-mode probe. The preparation method has a simple process and high operability, and can further meet production and application.

The invention discloses a sand culture method capable of quickly screening low-cadmium grain rice varieties. The sand culture method includes: preparing a culture medium-river sand; collecting river sand of 20-40 meshes, using clear water to wash the river sand, using a HCl solution of 3.8% in mass concentration for soaking for 30min, using tap water to flush, and taking cleaning liquid obtained in the last time for cadmium content testing, wherein when cadmium content is lower than 0.001mg / L, the river sand can be used for rice culture experiments; preparing sand culture liquid of 1.0mg / L, 0.5mg / L and 0.2mg / L in cadmium concentration; respectively planting to-be-screened rice varieties in culture buckets, inserting 2-4 roots in each culture bucket, and performing conventional fertilizingculture, wherein each root is for a seedling; using cadmium-pollution-free water as irrigation water; when rice is mature, harvesting rice seeds, and taking rice varieties of lower than 0.2mg / kg in rice cadmium content as low-cadmium grain rice varieties which can be further used for field experiments. The sand culture method is few in experiment error, high in repeatability, scientific and reliable in result and free of impact on biological yield of rice.

The invention relates to a preparation method of spectroscopically pure zirconium dioxide, concretely comprising the following steps of: placing zirconium tetrachloride into a container, dissolving by adding distilled water, standing overnight, and filtering to obtain a zirconium oxychloride solution A; adding hydrochloric acid into the zirconium oxychloride solution A for acidification, precipitating zirconium oxychloride, swabbing-off zirconium oxychloride, dissolving by distilled water, adding hydrochloric acid into the solution, precipitating zirconium oxychloride, and swabbing-off to obtain B; calcining B, heating up to the temperature of 300-400 DEG C, keeping a constant temperature for 1-1.5h; continuously heating up to the temperature of 500-600 DEG C and keeping a constant temperature for 1.2-1.5h; heating up to the temperature of 750-800 DEGC, keeping a constant temperature for 5-6h, taking out, and cooling to obtain the spectroscopically pure zirconium dioxide. According to the preparation method, the spectroscopically pure zirconium dioxide is prepared by two-time acidification and two-time purification of zirconium tetrachloride by the use of hydrochloric acid. The preparation method provided by the invention requires low cost, is simple and is easy to control.

The invention discloses an architecture method for four nodes of a 1U high-density server, and belongs to the field of computer communication. The method specifically comprises the steps that firstly, a computational node system is composed of a node mainboard and a PDB; secondly, a power supply system of a complete computer is composed of a PAB, the PDB and a power module; thirdly, two 2.5 hard disks are internally arranged and form a storage system of the complete computer; fourthly, a heat dissipation system of the complete computer is composed of two heat dissipation fans on each node and necessary cooling fins and wind scoopers on computational nodes. The high-density mode that the four nodes share the 1U space is adopted, the occupied space is effectively reduced, and the density of servers on a single cabinet is increased; the final operating and maintaining cost is directly reduced for customers through reduction of power consumption and increase of allocation density; the requirements for various applications and cloud computing in the internet market are met, and therefore the architecture method has very wide development prospects.

The invention provides a convenient-to-use intestinal static replacement experimental device. The device comprises an intestinal assembly simulating the large intestine shape of a human or animal, wherein an intestinal cavity bottom plate of the intestinal assembly is connected with a dome-shaped intestinal wall provided with a plurality of protruding quasi-ring bags and quasi-ring folds, the dome-shaped intestinal wall is provided with a gas inlet connector for nitrogen injection, a gas discharging opening discharges oxygen to from an oxygen-free environment, an edged bottle cover is installed on an intestinal cavity upper opening of the dome-shaped intestinal wall in a matched mode, the edged bottle cover is provided with a sample feeding pipeline and a sample taking pipeline for fillingan experimental sample into or sucking the experimental sample out of the intestinal assembly, a sample-discharging lower opening and a lower opening rubber plug provided with multiple probes are installed on the lower edge of the dome-shaped intestinal wall, a temperature control water sleeve provided with a water bath sealed bin is arranged around the intestinal assembly in a wrapping mode, temperature is controlled in the way that a water bath inlet and a water bath outlet are connected with a water pump and a water heater outside, and the outer surface of the temperature control water sleeve is tightly wrapped in a thermal insulation soft pad. The device has the advantages that an in-vivo experiment can be replaced with a convenient-to-perform and fast in-vitro static replacement experiment on the digestion function in intestines with low cost and high efficiency, and the requirements for standard scientific research and application are met.

The invention relates to an antenna structure of a digital television and a manufacturing method thereof. The antenna structure of the digital television comprises: a ceramic substrate having a first surface and a second surface which are opposite; and a radiation structure that is formed on the ceramic substrate and comprises a first metal microstrip line formed on the first surface and a second metal microstrip line formed on the second surface. Accordingly, the invention achieves the function of reducing the antenna size by using the high dielectric constant of the ceramic substrate.

The invention relates to a preparation method of in vivo targeted ovarian cancer cell imaging nano material composed of multifunctional macromolecule and metal-organic frames (MOFs). A polymer with atargeted ovarian cancer cell polypeptide is synthesized through an RAFT reaction, and the polymer is coordinated with Eu-MOF synthesized through a solvent thermal method, so that nano particles with targeted ovarian cancer cells and an in vivo fluorescent imaging function are obtained. The fluorescent material obtained through the method has the characteristics of good biocompatibility, strong targeted performance and strong illuminating intensity. The targeted polypeptide is grated onto the polymer through the RAFT reaction, then the polymer is constructed into rare earth MOF nano particles through a coordination method, so that the MOF nano particles have both fluorescent performance and a targeting function. The preparation method of the invention is simple in technique and strong in operability, and can further meet demands of production and application.

The invention discloses a lithium carbon dioxide battery positive electrode material and application thereof. The lithium carbon dioxide battery positive electrode material comprises aminated grapheneoxide; and the aminated graphene oxide is prepared by mixing graphene oxide, an amination reagent and water and carrying out hydrothermal reaction. The invention also provides an application of the lithium carbon dioxide battery positive electrode material in preparation of a lithium carbon dioxide battery positive electrode. The preparation method of the aminated graphene oxide in the positive electrode material of the lithium-carbon dioxide battery is simple, and the problems of large charge-discharge potential difference, poor cycle performance and the like of a high-capacity battery are solved.

The invention discloses an irrigating system. When the irrigating system is in a working state and when a crop is sensed by a humidity sensor at the root position of the crop to require a lot of water, a signal is sent by the humidity sensor to a central processing unit, a signal is sent by the central processing unit to a first magnetic valve, the first magnetic valve is started, and the crop is irrigated by the water through a spraying head; when the crop is detected by a soil data collector to be lack of water nutrient elements, a second magnetic valve and a third magnetic valve are automatically started by the central processing unit in the irrigating system, and the water and fertilizers are mixed by a water-fertilizer mixer to be sprayed from the spraying head to irrigate the crop. The irrigating system disclosed by the invention has the advantages that the excellent growing environment for the crop is ensured, the yield of the crop is increased, and the large-scale mass production and the application are satisfied.

The invention provides a comprehensive energy system model and a construction method thereof, and the method comprises the steps: constructing an elementary substance energy flow layer and a multi-energy coupling layer, building the incidence relation between the elementary substance energy flow layer and the multi-energy coupling layer, and obtaining a comprehensive energy system. Different control systems can conveniently and flexibly generate information models of respective devices, the models are rapidly integrated after interaction, development and implementation of different applications of the comprehensive energy system are facilitated, and new device types are conveniently added. If the multi-energy coupling layer is ignored, the model is simplified into a plurality of mutually independent elementary substance energy flow systems, and respective control systems and applications of cold, hot and gas are met. And if the single-energy-flow transmission equipment is further ignored, the model is simplified into a traditional power system standardized model. And if the elementary substance energy flow layer is ignored, only the multi-energy coupling layer and related source load equipment are reserved, and the model is simplified into a common energy router model which can be used for scenes such as some small parks / buildings / distributed energy stations and the like.

The invention discloses an enhanced heat exchange type heat pump system which comprises a heat pump device, a waste heat exchanger, a first water inlet pipe and a second water inlet pipe. The heat pump device comprises a compressor, a condenser, a throttling device, an evaporator and a liquid accumulator. A closed loop is formed by the compressor, the condenser, the throttling device, the evaporator and the liquid accumulator through a refrigerant pipeline. The first water inlet pipe is connected with a water source and communicated with the condenser. The second water inlet pipe is connected with the water source and communicated with the evaporator and the waste heat exchanger. According to the structure, before entering the waste heat exchanger, water flow in the second water inlet pipe is cooled in the mode that heat is extracted by the heat pump device, so that the heat exchange effect is greatly enhanced, and the energy saving performance and applicability of equipment are improved; meanwhile, refrigerants flow in the heat pump device circularly and do not enter the waste heat exchanger, the structure is simple, the production cost is low, the mounting difficulty and the maintenance rate are greatly reduced, and the requirements for onsite operation and application are met; besides, the water flow, with waste heat being recycled, in the second water inlet pipe does not need to return to the condenser to be heated, so that pipeline backflow and pressure loss are reduced.

The invention discloses a remote monitoring farm robot system, which includes a main body support, a farm robot, an image acquisition device and an outreach device, the farm robot is arranged on the main body support, and the robot can perform forward and backward operations on the main body support Left and right movement, the image acquisition device is arranged on the farm robot, the image acquisition device can move vertically relative to the robot, and the outreach device is connected to the main frame, the farm robot and the image acquisition device. The remote monitoring farm robot system of the present invention is easy to install, can be assembled modularly, is safe and reliable, can be controlled by a remote APP, and realizes three-dimensional and multi-dimensional movement, and has good interactivity: through remote video monitoring, the growth status of the plant can be checked in real time, satisfying The fun shared by users, good display, good applicability, convenient maintenance and reduced operating costs.

The invention provides a high strain hot rolled steel plate for an L485M offshore pipeline pipe and a manufacturing method thereof. The steel plate is prepared from the following components in percentage by weight: 0.02 to 0.08 percent of C, 0.10 to 0.40 percent of Si, 1.40 to 1.80 percent of Mn, 0.02 to 0.08 percent of Nb, 0.01 to 0.05 percent of V, 0.01 to 0.04 percent of Ti, 0.025 to 0.045 percent of Al, less than or equal to 0.010 percent of P, less than or equal to 0.005 percent of S, 0.10 to 0.50 percent of Cu, 0.02 to 0.30 percent of Mo, 0.06 to 0.45 percent of Cr, 0.10 to 0.50 percentof Ni, and the balance of Fe and unavoidable impurity elements. The manufacturing method comprises the steps of smelting molten steel, refining out of a furnace, casting, re-heating a plate blank, performing controlled rolling, performing controlled cooling, and performing air cooling to room temperature; the longitudinal mechanical properties of the steel plate produced by applying the manufacturing method are that the UEL (Uniform Elongation of Deformation) is greater than or equal to 10 percent, the yield strength Rt 0.5 is 400 to 550 MPa, the tensile strength Rm is 550 to 700 MPa, and theyield-to-strength ratio Rt0.5 / Rm of the steel plate is 0.70 to 0.80.

The invention belongs to the field of pharmaceutical chemistry, and relates to a preparation method of a tricyclic EGFR kinase inhibitor, and specifically relates to a preparation method of a compoundof formula i or a pharmaceutically acceptable salt, a crystal, a hydrate or a solvate thereof. The preparation method of the compound of formula i or the pharmaceutically acceptable salt, the crystal, the hydrate or the solvate thereof has relatively high yield and purity, the reaction conditions are mild, the purification is easy, the process is stable, the operation is easy, the environment friendly effect is achieved, and the industrial scale production and application can be met.

Disclosed is a heat pump water heating system with a function of divided-flow reinforced heat recovery. The heat pump water heating system with the function of divided-flow reinforced heat recovery comprises a first heat pump device, a second heat pump device, a heating device, a first inlet water flow path and a second inlet water flow path, wherein the heating device is used for heating water flow. The first heat pump device comprises a first compressor, a first condenser, a first throttling device and a first evaporator, wherein the first compressor, the first condenser, the first throttling device and the first evaporator are combined to form a circulation circuit. The second heat pump device comprises a second compressor, a second condenser, a second throttling device and a second evaporator, wherein the second compressor, the second condenser, the second throttling device and the second evaporator are combined to form a circulation loop. The first inlet water flow path passes through the first condenser and the second evaporator, the second inlet water flow path passes through the first evaporator, the heating device and the second condenser, the heating device is arranged between the first evaporator and the second condenser, and an ultraviolet disinfection device is arranged on the second inlet water flow path and arranged between the first evaporator and the second condenser. By the adoption of the structure, the heat absorption effect of the second inlet water flow path is greatly enhanced, refrigerant cannot enter the heating device, the structure is simple, the production cost is low, and the installation difficulty and the maintenance rate are greatly reduced.

The invention relates to a preparation method for an oxygen-sensitive multifunctional nonometer probe, and a product thereof. The probe takes an oxygen-sensitive material as a basis, and the biocompatible oxygen-sensitive multifunctional nonometer probe is formed through the covering and the modification of biomolecules and through compounding with photosensitive molecules and fluorocarbon compound. Through the oxygen-sensitive multifunctional nonometer probe, a relationship between tissues and O2 concentration can be researched so as to be favorable for applying to the treatment of tumors ofanoxic microenvironment. The preparation method disclosed by the invention has the advantages of simple technology and high maneuverability, and production and application can be further met.

The invention provides a contrast agent as well as a preparation method and application thereof. Erythrocyte in blood is used as a matrix, by loading the gadolinium chelate onto red blood cells by a hypotonic precipitation method, a novel electroporation method, a drug induction method and a drug induction method under a hypotonic condition, the gadolinium chelate has the advantages that the volume of the gadolinium chelate is increased, the migration of the gadolinium chelate to the outside of a blood vessel is blocked, the technical problem that an existing magnetic resonance contrast agentis easy to migrate to a gap outside the blood vessel is solved, and the contrast agent has wide application in the fields of magnetic resonance imaging and imaging.

The invention discloses a method for realizing DNS (Domain Name Server) data isolation of a plurality of Internet access channels. The method comprises the following steps: recording an IP (Internet Protocol) address of under-hanging equipment and a DNS address bound to an Internet access routing WAN (Wide Area Network) to a configuration file, and receiving a DNS request of the under-hanging equipment by a gateway; sending a DNS domain name resolution request message to a DNSMASQ service of the device by the lower device; and enabling the DNSMASQ service to look up a corresponding DNS server address in the data storage chain table according to the IP address of the under-hanging device, so that the DNS request of the under-hanging device on the LAN side is forwarded from the DNS server of the bound Internet route WAN. According to the invention, based on the existing DNSMASQ service, the DNSMASQ service is convenient to read and easy to maintain in the form of recording the configuration file; and the DNS data isolation of different Internet access channels is realized, and the application and implementation of an operator in some specific business scenes can be met.

The invention discloses a method for measuring the depth of a superhard abrasive impact toughness sample tube. By cleaning a sample tube with alcohol before measurement, the influence on the measurement result caused by dust and sundries adhered to the sample tube can be effectively avoided, the measurement error is reduced, and the measurement accuracy is improved; and a G5-precision steel ball with high ball precision is adopted, the steel ball diameter and the measurement direction are independent from the direction of putting the steel ball into the sample tube effectively, thus the measurement is more convenient, accurate and effective, and the repeatability measurement error can be effectively controlled below 0.01mm. In the measurement method disclosed by the invention, the tool selection is easy, and the measurement steps are simple and convenient; more importantly, the measurement result error is low, the data is accurate, the error is low, thus the performance index and product grading of the superhard abrasive are more accurate, the actual production and application of the product are better met, and the product quality as well as the safety, stability and reliability of actual application is improved.