185results about How to "Fast gathering" patented technology

The invention discloses a resident diet balance quantification analysis method based on an intelligent information processing terminal, and a system thereof. The resident diet balance quantification analysis method comprises the steps of firstly establishing a customized healthy dirt evaluation standard, establishing a science popularizing database on the intelligent information processing terminal; evaluating the rationality of resident diet; providing an energy consumption guidance to a user; providing a customized automatic diet to the user; and providing dynamic display for typical dishes and diets. The resident diet balance quantification analysis method and the system perform necessary setting for the upper limit and the lower limit of nutrition intake recommend value of different groups, and provide diet quantification analysis, balanced diet guidance, human body nutrition intake and consumption, diet matching, dish recommend, making demonstration and specific population diet guidance, and furthermore can be used anytime and anywhere. Professional knowledge of nutriology is transmitted to common people in a science popularizing mode, thereby realizing purposes of improving people's constitution and reducing frequency of chronic diseases.

A system and method are disclosed for rapidly exchange accident related information. Data locator codes representing people and respective vehicles the people are insured to drive are generated and stored by central server. Software is installed on mobile devices that interface with the central server, and the software is configured with at least one of the data locator codes. A notification regarding an accident event involving two parties is received via the software. The central server receives accident information, which may include a data locator code the other driver, as well as images, voice messages or text information representing the accident. The central server uses the information to contact respective insurers of the parties, processes the data, and the parties can depart the scene without a need for police or other emergency care personnel.

The invention discloses a single-chain antibody of human source anti-alexin C3d molecules. A light chain and a heavy chain of the antibody have a unique CDR region; excellent antigen binding activityis realized; the affinity constant reaches 1.22*10<-7> mol / L. Biological distribution experiments prove that the anti-C3d single-chain antibody provided by the invention can be highly gathered in thearthritis positions after entering a mouse model with rheumatoid arthritis; the arthritis serious degree of the three ScFv treatment groups is obviously lower than that of a PBS group; the healing degree has the obvious dose dependency relationship; the result shows that the excellent anti-adhesion / anti-inflammatory targeted inhibition effects are achieved. In the treatment process on MRL / lpr mice with lupus erythematosus, the anti-C3d single-chain antibody provided by the invention can obviously improve the survival rate of the mice; the symptoms of proteinuria, glomerular score, interstitial inflammation, vasculitis and crescent / necrosis and the like in the treatment group are obviously relieved. The result shows that the anti C3d single-chain antibody provided by the invention has excellent application prospects in the preparation of medicine for treating autoimmune diseases.

The invention relates to an efficient dechlorinating agent for waste incineration fly ash. The dechlorinating agent is prepared from one or more of nitrate, phosphate, organic acid and phosphoric acid. The invention also relates to a dechlorination method and a dechlorination device. According to the method, the principle of electrochemical ion migration is utilized, the efficient dechlorinating agent beneficial to enhancing the migration efficiency of chloride ions in the waste fly ash is added in the process of washing the waste incineration fly ash, and an electric field device specially designed on site is added, so that the liquid / solid ratio is lower, the water consumption for washing is less, and the desorption and migration efficiency of the chloride ions in the fly ash is higher in the process of washing the chloride ions in the waste fly ash, thus achieving the effect of efficiently removing chlorine salt from incineration fly ash.

The invention relates to a low-grade iron ore direct reduction method, which comprises: calculating and taking a certain amount of coal powder, an additive, a binder and water by adopting the dry basis mass of iron ore to be treated as reference; uniformly mixing the taken components, and completely wetting to obtain an internal matching coal; uniformly mixing the internal matching coal and iron ore particles to be treated, and granulating to obtain granulated pellets; directly conveying the obtained granulated pellets into a rotary kiln, carrying out drying, pre-heating, and reduction roasting to carry out coal base direct reduction so as to obtain a reduced material, cooling the reduced material in the absence of air, and carrying out dry magnetic separation to obtain the reduced roasting pellets and the residual carbon; and carrying out treatments such as ore grinding and magnetic separation on the reduced roasting pellets to obtain iron concentrate, or carrying out re-grinding and re-magnetic separation to obtain the reduced iron powder, wherein the obtained residual carbon can be recycled. With the method of the present invention, the low-grade iron ore can be effectively treated, the internal matching coal and the additive are used to granulate, the wet pellets enter the kiln, the coal base direct reduction is performed, the magnetic separation is performed to obtain the high-grade iron concentrate or the directly-reduced iron powder, and the method has characteristics of energy saving, high efficiency, and rapidness.

The invention provides a monitoring message alarming method and system. The monitoring message alarming method comprises the following steps: collecting monitoring messages of all the application platforms, wherein the monitoring messages comprise service request identifications and response state identifications of service requests; obtaining the response state of the monitoring messages of the same service request identification according to the service request identifications and the response state identifications of the service requests; and when judging that the response state of the monitoring messages of the same service request identification satisfies a preset alarming standard, searching a preset alarming object corresponding to the service request identification and sending an alarming notification to the alarming object. According to the method and system, the application service with faults can be automatically searched and alarmed, so that the application operation and maintenance efficiencies are improved.

The invention discloses a composite wastewater treatment medicament and a preparation method thereof, and belongs to the technical field of recycled water treatment. The water treatment medicament prepared through the invention modifies an activated carbon system through a carbon-nano tube, the specific area of the medicament is increased, a porosity structure is intensified, and adsorption, electrostatic and other effects are enhanced, so that quick enrichment of pollutants is realized; the loaded persulfate plays a catalytic action through the Co and Fe ions combined by polyoxometalate (POM), the production of the sulfate free radical and hydroxy free radical is further promoted by combining the use of the hydrogen peroxide, and an advanced oxidation effect for activating the persulfateis formed, and the enriched pollutants are efficiently oxidized and degraded. The water treatment medicament prepared through the invention has oxidation and adsorption functions, and can effectivelyremove phosphorous, color and COD.

The invention discloses a multifunctional carrier based on cytogenic vesicle in body fluid, a preparation method and an application. The method comprises the following steps: (1) collecting human body fluid, performing gradient ultra-centrifugation, removing supernatant and using sterile PBS heavy suspension for precipitating and (2) adding the cytogenic membrane vesicle from the body fluid, ultra-small luminescent material and electroporation buffer solution into an electric shock cup, uniformly mixing, placing onto an electroporation instrument and treating, placing under room temperature and repairing after the ending of electroporation, performing ultra-centrifugation and then using sterile PBS heavy suspension for precipitating, thereby acquiring the multifunctional carrier based on the cytogenic membrane vesicle from the body fluid and marked with the ultra-small luminescent material. The carrier is used for preparing a chemotherapeutic drug or gene therapeutic drug for treating or preventing tumor, has high biocompatibility, is convenient to carry various therapeutic drugs, is capable of effectively restraining tumor growth, is suitable for diagnosis and treatment of various innocent and malignant tumors and especially supplies a choice for the diagnosis and treatment of deep tumors in skull, thoracic cavity and abdominal cavity.

The invention discloses a fuzzing, pilling and ultraviolet-prevention finishing agent and preparation method and application. The finishing agent is prepared by the method comprising the following steps: (1) dissolving titanium alkoxide in an organic solvent, adding the obtained solution into acid aqueous solution and stirring uniformly to obtain a mixture; and (2) adding silicon alkoxide into the mixture obtained in the step (1), and stirring uniformly to obtain transparent solution; or (1) sequentially dissolving acid and silicon alkoxide in water, and stirring uniformly to obtain a mixture; and (2) dissolving titanium alkoxide in an organic solvent, adding the obtained solution into the mixture obtained in the step (1), and stirring uniformly to obtain transparent solution. The finishing agent disclosed by the invention is simple in preparation and short in the finishing process, and meets the requirements of water and energy conservation, low carbon and environmental protection.

The invention discloses a magnetic nanocomposite based on a two-dimensional stratified material magadiite, and a preparation method and application thereof. According to the method, the magnetic nanocomposite based on the two-dimensional stratified material magadiite is compounded at one step based on the coprecipitation method, and ferroferric oxides in the compounded magnetic nanocomposite are loaded among layers and on the surface of the magadiite evenly, so that the problems that ferroferric oxide nanoparticles are easy to agglomerate and the magadiite serving as an adsorbent is difficultto separate are solved, and the magnetic nanocomposite has paramagnetism and biological compatibility as the ferroferric oxides as well as ion exchange property and adsorbability as the magadiite. Themagnetic nanocomposite, and the preparation method and the application thereof have the advantage of simple process, easiness in operation, non-existence of harmful substances in raw materials, environment protection, energy conservation, low cost and easiness in industrial production. The magnetic nanocomposite based on the two-dimensional stratified material magadiite is applied to remove organic dye in water pollutants, have good adsorption performance and can be separated quickly under the action of an external magnetic field.

A sodium bentonite processing agent for blue-green algae is prepared from the following raw materials in parts by weight: 10-20 parts of serpentine, 40-45 parts of sodium-base bentonite, 2-3 parts of magnesium chloride, 8-13 parts of calcium chloride, 15-20 parts of potassium ferrate(VI), 12-16 parts of equisetum hyemale, 13-16 parts of pericarpium granati, 3-5 parts of polymaleic acid, 3-4 parts of sodium pyrophosphate, 2-3 parts of urea, 3-5 parts of anhydrous sodium sulfate, 3-5 parts of boric acid, 4-6 parts of polyvinyl alcohol, proper amount of water, and 3-4 parts of an adsorption auxiliary agent. By adding potassium ferrate(VI), the processing agent for blue-green algae has synergic effects of oxidation, adsorption, flocculating, precipitation, sterilization, disinfection, decoloring and deodoring, also does not generate any toxic and harmful substances, is capable of increasing water dissolved-oxygen content, has good removal effects on ammonia nitrogen, nitrites and algae in water, and is used to remove fulvic acid and suspensions in water and eutrophication phenomenon in fresh water. The processing agent for blue-green algae is good in dispersing suspending property and good in adsorption property, and can help to rapidly aggregate and salvage blue-green algae.

The invention relates to a method for enriching vitamin K2 in natto bacillus fermentation liquid. The method comprises the following steps of step 1, performing centrifugation on the natto bacillus fermentation liquid, and collecting supernatant; step 2, adding a flocculant and a filter aid to the supernatant obtained in the step 1, then performing stirring, performing centrifugation, and collecting supernatant; step 3, adding Fe3O4@SiO2-G nanometer microspheres which are reduced to the supernatant obtained in the step 2, regulating the pH to 6.0-8.0, then performing stirring treatment under the condition of 20-35 DEG C for 10-30min, and then collecting magnetic materials after adsorption; and step 4, adding hexane to the magnetic materials after adsorption, performing ultrasonic parsing for 5-20min, then externally applying a magnet, collecting magnetic nanometer materials, pouring out organic phase, and performing filtering, wherein filtrate is a hexane solution rich in vitamin K2. According to the method for enriching vitamin K2 in natto bacillus fermentation liquid, the VK2 in the natto bacillus fermentation liquid can be quickly and efficiently enriched. The method has the advantages that the specific steps are simple, the materials are low in price, and can be reused, and the enrichment effect is efficient.

The invention discloses plastic cleaning equipment comprising a cleaning box, a top cover and cleaning devices, the top cover is rotationally connected to the center of the top of the cleaning box, the cleaning devices are rotationally connected to the positions, close to the top cover, between the two corresponding sides of the inner wall of the cleaning box, and the cleaning devices are evenly distributed in the cleaning box. A roller is fixed to the center of the surface of a driving rotating shaft and located in the cleaning box, cleaning brushes are fixed to the surface of the roller and evenly distributed on the surface of the roller, and a brushing device is fixed to the surface of the roller. According to the plastic cleaning equipment, the purposes of pressing down and cleaning are achieved, flaky floating plastic chips are pressed down to make full contact with water, rise through the buoyancy of the flaky floating plastic chips and are combined with the cleaning equipment for rapid cleaning, smooth completion of cleaning work is facilitated, adaptability is high, limitation is reduced, and the cleaning efficiency and the use performance are improved.

A composite material for water or wastewater treatment is described. The composite material has a buoyant substrate, an adsorbant for adsorbing organic compounds, a photocatalyst for degrading organic compounds, and an enhancer for facilitating mass transfer between the adsorbent and the photocatalyst, increasing the selectivity of the composite material, or for improving the photocatalytic efficiency is described. The adsorbent, photocatalyst, and enhancer are immobilized on the substrate.

The present invention relates to a ray detector and particularly relates to an alpha and beta ray detector with the form of the combination of a thin plastic scintillator and a photomultiplier tube. Through the structural design, external photons are avoided from entering into the detector as far as possible, the inner surface light collection efficiency of the detector is improved, and the ray transmission area of a detection window is increased. The light shielding of the detection window is mainly rely on the elastic contact of a black silicone ring with the plastic scintillator, a light shielding film, a shell side wall and a protection cover. The inner surface of a detector shell is coated with an aluminium film, thus the flashing light reflection factor is larger than 0.9, the four walls of the detector shell are designed to be slopes, the reflection times of the flashing light in the detector shell is reduced, and thus the photons can be gathered quickly. The shield grids of the detection window have two forms, one is a honeycomb hexagonal grid, the transmittance of ray vertical incidence is larger than 90%, the other one is the combination of a hexagonal grid with a stainless steel gauze, and the transmittance of the ray vertical incidence is larger than 75%. The detector has the advantages of simple structure, high maintainability and high detection efficiency.

The invention relates to a soil dehydration desiccation or solidification method, and belongs to the field of soil dehydration and foundation reinforcement. According to the method, a specially-designed vacuum plate is inserted in soil, then moisture in the soil is discharged through a vacuum preloading process, at last, a sealing film is removed, a vacuum pump is continuously used for pumping the soil, and air flowing in the soil is accelerated. The soil dehydration desiccation or solidification method is easy to operate, low in cost, good in dehydration desiccation effect, and free of secondary pollution.

The invention discloses an unmanned aerial vehicle cluster confrontation control method based on pigeon flock intelligent competitive learning. The unmanned aerial vehicle cluster confrontation control method comprises the following implementation steps of 1, initializing cluster confrontation environment setting; 2, establishing an unmanned aerial vehicle cluster confrontation motion control model; 3, establishing a combat target distribution model based on a dynamic game theory; 4, establishing a cost function of unmanned aerial vehicle cluster combat target distribution; 5, designing a pigeon flock optimization algorithm based on a competitive learning mechanism; and 6, outputting an unmanned aerial vehicle cluster confrontation result. The method solves problems of motion control and combat target distribution in unmanned aerial vehicle cluster confrontation, is low in design cost, high in real-time performance and high in stability, has a practical application value, and improves an autonomous ability level in unmanned aerial vehicle cluster confrontation.

The invention discloses a cylindrical battery pack which comprises heat radiation fins, an aluminum-based plate, heat tubes, cylindrical batteries and heat radiation brackets, wherein the cylindrical batteries are wrapped by insulating membranes; two ends of the cylindrical batteries are respectively positive lugs and negative lugs; a plurality of grooves for holding the cylindrical batteries are uniformly formed at intervals in the outer surfaces of the heat radiation brackets in a concave manner; through holes are formed in the middle of the heat radiation brackets; the extension directions of the through holes are accordant with those of the cylindrical batteries; the heat tubes comprise connecting parts and tail end parts; the tail end parts are mounted in the through holes; the connecting parts are mounted on the surface of one side of the aluminum-based plate; the heat radiation fins are assembled on the surface of the other side of the aluminum-based plate in an adhesion manner. The cylindrical battery pack disclosed by the invention has good heat conduction and radiation channels.

The invention discloses a fusion protein of a single-chain antibody of a human anti-complement C3d molecule and a complement inhibitor CD59. The antibody has excellent antigen binding activity. Biological distribution experiments prove that the fusion protein provided by the invention can be rapidly and highly aggregated at an arthritis part after entering a rheumatoid arthritis mouse model, and has an excellent anti-adhesion / anti-inflammation targeting inhibition effect. In treatment of MRL / lpr lupus erythematosus mice, the fusion protein provided by the invention can obviously improve the survival rate of the mice, and symptoms of proteinuria, glomerular score, interstitial inflammation, vasculitis, crescent / necrosis and the like of a treatment group are obviously improved, so that the fusion protein provided by the invention has an excellent application prospect in preparation of medicaments for treating autoimmune diseases.

The invention relates to an aquaculture system capable of separating and removing shrimp shells and dead shrimps in a shrimp circulating aquaculture pond and belongs to the technical field of aquaculture. The system comprises an aquaculture pond, an aquaculture pond bottom blow-off pipe, an aquaculture pond bottom shrimp discharging pipe, an aquaculture pond center 'flower pipe', a dead shrimp collecting tank, a shrimp draining cover, a nano air tube, an air conveying hose and a main air supply tube. Dead shrimps can be timely discharged, and spreading of diseases is avoided.

The invention discloses a method for preparing a magnetized and hydroformyled sheep red blood cell. The method comprises the following steps of: preparing nano magnetic beads; preparing a hydroformyled sheep red blood cell; preparing a magnetized and hydroformyled sheep red blood cell; coating protein on the magnetized and hydroformyled sheep red blood cell; detecting a sample; and observing the result. The prepared magnetized and hydroformyled sheep red blood cell can be used as an indicator cell of an agglutination test, a carrier, enzyme and a chemiluminescence matter of an antigen antibody agglutination test, or a carrier detected in a fluorescent material marking test. The magnetized and hydroformyled sheep red blood cell prepared by the method is long in retention period, simultaneously has paramagnetism, can achieve rapid aggregation and redispersion, avoids complicated centrifuge processes in the traditional agglutination test, and can be used for preparing artificial granular antigen antibodies with uniform sizes; coating and detection reaction are carried out in a uniform phase after a solid-phase carrier is replaced; and the method is full in action, high in sensitivity, low in cost than an elisa plate, and is mainly applied to a screening or quantitative detection test of a special red blood cell antibody and other soluble antigen antibodies.

The invention provides hot-rolled round steel for a high-carbon-manganese-chromium grinding ball. The hot-rolled round steel is prepared from the following components: 0.72 to 0.82 percent of C, 0.17to 0.35 percent of Si, 0.70 to 0.90 percent of Mn, 0.010 to 0.030 percent of P, 0.010 to 0.030 percent of S, 0.50 to 0.70 percent of C, 0.20 to 0.30 percent of In, 0.10 to 0.20 percent of Ag, 0.15 to0.25 percent of Cu, 0.080 to 0.100 percent of Ga, 0.20 to 0.26 percent of Ni, 0.10 to 0.14 percent of Zn, 0.14 to 0.16 percent of Sn and the balance of Fe and unavoidable impurities. The round steel provided by the invention contains relatively high elements including carbon, manganese, tin and the like and can be obtained by refining a casting-state structure of steel, so that the prepared grinding ball has relatively great rigidity; when an object with relatively great rigidity is ground, good wear resistance can be ensured; meanwhile, the round steel also contains the chromium element withrelatively high content, so that the round steel has a relatively strong corrosion-resisting capability and the round steel is suitable for being used in various fields for grinding.

The invention relates to a bionic magnetosome loaded with siRNA and a preparation method of the magnetosome, and belongs to the field of chemistry and biomedicine. According to the bionic magnetosome, water-soluble MNC serves as the kernel and is wrapped by a white cell membrane, and siRNA is loaded between the MNC and the white cell membrane; antibodies or peptides with modifying groups can be coupled outside the white cell membrane of the bionic magnetosome in a covalence mode. By preparing MNC, M and MNC:siRNA and mixing an MNC:siRNA solution, an M solution and a buffer solution, the bionic magnetosome is obtained; the white cell membrane of the bionic magnetosome is modified by the peptides or antibodies through the modifying groups, and the bionic magnetosome coupled with the antibodies or peptides is obtained. The MNC in the bionic magnetosome has positive charges, can adsorb siRNA and is wrapped by M for bionics, a focus is reached efficiently and rapidly, and meanwhile immune elimination of organisms is avoided.

The invention discloses a forested coating film, which is prepared from the following raw materials in percentage: 18.2 to 18.5 percent of HP, 0.5 to 0.57 percent of dispersing agents, 0.2 to 0.24 percent of defoaming agents, 0.4 to 0.44 percent of wetting agents, 5 to 6 percent of polyethylene glycol, 0.2 to 0.25 percent of preservatives, 0.5 to 0.54 percent of mildew preventives, 0.5 to 0.53 percent of APM-95, 30 to 32 percent of negative ion raw liquid, 40 to 42 percent of resin, 2.5 to 2.7 percent of coalescing agents and 2 to 3 percent of anti-formaldehyde auxiliary agents. The forested coating film product provided by the invention has the advantages of good defoaming performance, no toxicity, no irritation, excellent lubrication performance, excellent moisture preservation performance and excellent anti-static performance.

The invention provides a method for eliminating landslide mass area terrace interflow. The method includes the following steps: a, excavating a drainage ditch on a terrace; b, laying a layer of clay in the drainage ditch; c, placing a drainage pipe with water seepage holes uniformly arranged on the peripheral wall by 180 degrees in the drainage pipe, enabling a face with the water seepage holes to be upward and a portion without the water seepage holes to be buried in the clay, and compacting the clay; d, laying a layer of gravel of 8-13cm in thickness on an upper half of the drainage pipe, and laying geotechnic cloth to wrap the gravel; e, laying a layer of straw and fly ash; f, backfilling soil and hierarchically compacting to be flat; arranging a transverse furrow along a ridge of a previous step of the terrace in each step of the terrace. By the method, surface water seeping in the landslide mass area terrace and interflow formed by the surface water can be effectively eliminated, so that technical obstacles when a landslide area is reclaimed to be a terrace are overcome. The method has the advantages of being low in cost, simple, convenient, high in efficiency, easy in operation and the like, and is convenient for large-scale popularization and use.

The invention discloses a working gas shunting system. The working gas shunting system comprises a main gas supply pipeline and a three-way pipe, wherein the front end of the main gas supply pipeline is connected with the gas inlet end of the three-way pipe; the two gas outlet ends of the three-way pipe are connected with a branch gas supply pipeline; a plurality of conical sleeves are arranged in the gas inlet end and the two gas outlet ends of the three-way pipe; the ends, which are back on to an air flow direction, of the conical sleeves are large-mouth ends, and the other ends are small-mouth ends; electromagnetic valves are arranged in the two gas outlet ends of the three-way pipe respectively; gas flow sensors are arranged in front of the electromagnetic valves in the two gas outlet ends of the three-way pipe respectively; the gas flow sensors are electrically connected with the electromagnetic valve on the same sides through controllers respectively. The working gas shunting system is reasonable in structure; shunting is performed through the three-way pipe, so that normal work of pneumatic equipment can be ensured; the conical sleeves in the three-way pipe can gather flowing gas rapidly, and heat loss caused by contact of certain special gas with a pipe wall can be reduced.

The invention discloses a heating assembly for peritoneal dialysis. The heating assembly for peritoneal dialysis is provided with a silica gel heating sheet; the silica gel heating sheet is provided with a first heating component and a second heating component; the middle part and / or the secondary middle part of the silica gel heating sheet are / is provided with hole sites; the hole site penetratesthrough the first heating component and the second heating component; a metal heat conduction plate is arranged above the silica gel heating sheet; the hole sites lead to the surface of the middle part and / or the secondary middle part of the metal heat conduction plate to form mounting sites; and the mounting site is provided with a thermal protector and / or a temperature sensing chip. The heatingassembly for peritoneal dialysis is provided with the heating components with different resistance values, and the control circuit starts the heating components with the corresponding voltage resistance values according to different power supply voltages, so that the heating assembly for peritoneal dialysis is separated from a power adapter to be independently used, the economic expenditure for purchasing the power adapter is reduced, and the carrying weight is reduced.

The invention discloses an antibody type biological magnetic microsphere as well as a preparation method and application thereof. On one hand, the invention provides the biological magnetic microsphere, at least one polymer with a linear main chain and branched chains is fixed onto the outer surface of a magnetic microsphere body, and tail ends of the branched chains of the polymer of the biological magnetic microsphere are connected with antibody type labels. The invention also provides a preparation method and application of the biological magnetic microsphere provided by the invention. The biological magnetic microsphere provided by the invention is convenient in operation and use and can be rapidly dispersed and rapidly settled in a solution, and large-scale experimental facilities such as a high-speed centrifugal machine are not required to be used; the biological magnetic microsphere is an antibody magnetic bead, and the antibody type labels can also be connected to the tail ends of the branched chains of the polymer through interaction of an affinity compound; and the use is wide, and the antibody type labels as a purification medium have flexible selectivity, and are universally and massively applied to separation and purification of a target object.

The invention relates to wear-resistant steel and belongs to the technical field of metal smelting. The wear-resistant steel is prepared from the following components in percent by mass: 0.88-0.94% ofC, 0.20-0.30% of Si, 0.90-1.00% of Mn, 0.50-0.60% of Cr, 0.20-0.60% of W, 0.10-0.25% of V, 2.50-3.00% of Zr, 0.010-0.050% of Ti, 0.020-0.050% of Y, less than or equal to 0.025% of P, less than or equal to 0.025% of S, less than or equal to 0.25% of Cu and the balance of Fe and inevitable impurities. The wear-resistant steel has the beneficial effects that the problems of low strength and poor wear resistance of the existing low-carbon wear-resistant steel is solved; the wear-resistant steel is finer in crystal and fuller in internal density, and a grinding ball prepared by the wear-resistantsteel is larger in hardness and good in wear resistance.

The invention belongs to the field of computers, and particularly discloses a heat dissipation device of computer case heating parts. The heat dissipation device includes a heat dissipation fan arranged in a case; an air collection groove is arranged on an air outlet part of the heat dissipation fan; an air pipe communicates with the air collection groove; a heat dissipation mechanism is opposite to a position of the air outlet part of the air pipe; the heat dissipation mechanism includes a plurality of heat dissipation units arranged on heating parts; the rotation shaft is connected between the heat dissipation units; a plurality of rotation blades are coaxially arranged on the rotation shaft. The scheme can performing first heat dissipation, second dissipation, and third dissipation on the case heating parts, can greatly improve the heat dissipation efficiency of the case heating parts, and is excellent in heat dissipation effect.