36results about How to "Reduce tissue" patented technology

A mill guide instrument for guiding a tissue cutting tool is provided that is made up of subassemblies of a guide body and a mill guide. The guide body has a distal section dimensioned to fit into a bore in bone and a removable template with a guide surface unique to a proposed cavity shape. The mill guide is connected to the guide body and provides for controlled relative motion between the mill and the guide body. The mill guide has an attached stylus that follows the guide surface of the template. The stylus follows the template guide surface so as to constrain the path of the mill to a preferred milling path.

The invention discloses a competition management system and a method based on network which includes registering through network and setting evaluating indexes; planning and organizing a competition, treating and issuing competition result, updating the evaluating indexes; carrying out integral ranking according to the evaluating indexes; the invention further includes inviting a competition and a knockout tournament through the network as well as carrying out qualification management and matching. The competition management system and the method of the invention has the advantages of breaking the restrictions of time, place, personnel, facilities and contact ways of various competitions, improving the competition involvement, reducing the organizing and managing costs of the competitions and promoting the economic and social values of the competitions.

The invention relates to the field of aluminum alloy material manufacturing, in particular to a method for producing an aluminum strip for a power battery shell through a cast-rolling method. The method comprises the specific steps that raw material matching is carried out according to alloy components; after raw materials are molten, an additive is added to adjust the components; after being molten, the raw materials are guided into a standing furnace; after being subjected to online degassing and filtering, treated molten aluminum is subjected to cast-rolling; two times of modification treatment are carried out in a launder between a degassing box and the standing furnace and a launder between a filtering box and a cast-rolling machine; a produced cast-rolled plate blank is subjected to certain rolling, then subjected to inner ring and outer ring welding and then annealed at the thickness ranging from 4.0 mm to 9.0 mm; and an aluminum coil of the finished product thickness is subjected to secondary heat treatment and then subjected to slitting machining and is slit to the target width. The method is different from traditional hot rolling method production, the cast-rolling method is adopted for production, and cost reducing and period shortening are achieved.

The invention provides a precise forging-continuous rolling production technology of a large and heavy single molybdenum rod. The production technology comprises the following steps of: 1, carrying out billet forging on the molybdenum rod by a precision forging machine to obtain a precision forging bar; 2, heating the precision forging bar; 3, rolling for the first time by a Y-shaped three-roller continuous mill to obtain a rolled molybdenum rod; 4, heating the rolled molybdenum rod; and 5, rolling for the second time by the Y-shaped three-roller continuous mill and obtaining the large and heavy single molybdenum rod of which the piece weight is 45-50kg. Deep processing of a molybdenum bar is successfully achieved by setting and optimizing each parameter in precision forging, thermal treatment and continuous rolling processes; the large and heavy single molybdenum rod, which is suitable for subsequent wire drawing, and of which the piece weight is 45-50kg, is finally produced; and the production efficiency is obviously improved. The piece weight of the molybdenum rod produced by the production technology is much greater than that of the molybdenum rod produced by a traditional technology; and the precise forging-continuous rolling production technology has no welding spot on the whole, and is even in internal organization, high in product quality and suitable for large-scale industrial production.

The invention discloses a welding wire for submerged arc welding of high-manganese low-temperature steel and a welding method, and relates to the technical field of welding. The welding wire is prepared from the following chemical components according to mass percent: 0.2% to 0.4% of C, 12% to 15% of Mn, 16% to 20% of Ni, 2% to 5% of Cr, less than or equal to 0.004% of P, less than or equal to 0.002% of S and the balance of Fe and inevitable impurities. The manganese-nickel composition design adopted by the welding wire has good compatibility with high-manganese low-temperature steel base metal and is suitable for a conventional welding wire manufacturing method, the composition is simple, weld metal formed by the welding wire has good impact toughness at low temperature of -196 DEG C, andthe welding requirement of the high-manganese low-temperature steel for constructing equipment like a liquefied natural gas storage tank is preferably met.

The invention discloses a nickel-based target and a production process. The production process comprises working procedures of cold rolling, high-temperature vacuum heat treatment, ammonia atmosphere protective heat treatment, primary rolling, welding, precision rolling, annealing and the like. The production process has no high-temperature processes of smelting, hot rolling and the like, and also has no high-pollution processes of acid washing, alkali washing and the like. Therefore, compared with the conventional process, the production process reduces the energy consumption by 30 percent and the metal loss by 50 percent, improves the one-time yield by over 10 percent, has high comprehensive utilization rate of resources, and is environmentally-friendly; and the process is simple and convenient to operate, can effectively guarantee the purity of a electrolytic nickel thin plate, improve the comprehensive mechanical property and physical property of the electrolytic nickel thin plateand replace the prior production process for smelting and hot-rolling the nickel target, and is suitable for industrialized production.

Noninvasive methods for therapeutically heating a collagenous target tissue of a pelvic support system to a desired temperature range are provided. Energy can be delivered to the target tissue via an applicator device having a plurality of spaced electrodes. The spaced electrodes are selectively activated in accordance with treatment groupings defined by input parameters generally associated with “standard” or “short” treatment modes. These treatment modes can correspond to the urethral length of the target tissue.

The invention discloses a natural cherry fresh keeping agent and a preparation method thereof, wherein the natural cherry fresh keeping agent comprises, by weight, 17-23 parts of chitosan, 13-18 parts of tea polyphenol, 8-12 parts of calcium propionate, and 940-970 parts of water. According to the present invention, the components of the natural cherry fresh keeping agent are the natural and non-toxic substances, and cannot produce harm to human body; with the natural cherry fresh keeping agent, the cherry storage time can be prolonged to 8 days, wherein the cherry can be stored for 4 days at the room temperature, such that the storage time is doubled, and the fresh keeping effect is significant; and the fresh keeping agent preparation method is simple and is suitable for promotion and use.

The invention discloses a solid core wire for gas protection welding of high manganese low temperature steel. The solid core wire is characterized by comprising the following chemical composition in percentage by mass: 0.2-0.4% of C, 12-15% of Mn, 14-18% of Ni, 1.5-4.5% of Cr, 0.1-0.6% of Mo, 0.005-0.040% of Ti, no more than 0.004% of P, no more than 0.002% of S and the balance Fe and inevitable impurity elements. The solid core wire adopts the alloy design of composite manganese and nickel adding, the content of expensive elements such as nickel and the cost of alloy are reduced, the fact that the excessive amount of manganese forms excessive toxic manganese evaporation in the welding process is avoided, the use performance of the wire is improved, the weld metal formed by the solid corewire at low temperature of minus 196 DEG C has excellent impact toughness, and the welding requirements of the high manganese low temperature steel for the construction of liquefied natural gas storage tanks and other equipment are well met.

The invention discloses a plastic forming process of an integral top cover of a nuclear power water chamber and an intelligent forging press used by the plastic forming process. The plastic forming process comprises the following steps that: three-dimensional modeling is performed, so as to simulate a model, blanks are obtained by using large LCD (liquid crystal display) near-net forming, intelligent plastic forming is performed on the top cambered surface, and annular intelligent plastic forming is performed on the side surface of a cylinder. A vertical rack of the intelligent forging press is fixed on the ground, a movable cross beam is driven to longitudinally slide by a main working cylinder on the vertical rack, a rotary workbench can be rotatably positioned on a movable workbench of the movable cross beam around a vertical rotating shaft, a horizontal rack is driven to longitudinally move by a support cylinder on the vertical rack, a horizontal working cylinder on the horizontal rack corresponds to an intelligent auxiliary pressure head which can horizontally extend, an intelligent main pressure head can longitudinally extend and can be fixedly positioned on the vertical rack, and a sensing system is used for sensing the temperature of forgings, the pressure of the pressure heads and the metal flow information of the forgings. The integral top cover of the water chamber has the advantages of high precision, material saving, short processing cycle, high forging flexibility and low processing cost.

The invention discloses a rolling process plate form control method for high-strength steel with the thickness specification being 6 mm or below. The plate form control method comprises the procedures of heating, rough rolling, finish rolling, controlled cooling and hot straightening. In the heating and rolling processes, the integral temperature uniformity of a casting blank and an intermediate blank and structure state uniformity after phase changes happen are sufficiently considered, and the problems that in the medium-thick plate steel ball rolling process, due to the reason in the aspect of the technology, stress is uneven, stress is generated due to the uneven temperature and the structure difference, and consequently irregular deformation is caused are solved. According to the plate form control method, the blank thickness compression ratio is smaller than or equal to 20, the elongation ratio is smaller than or equal to 16.5, and the lateral spread ratio meets the formula: 1.0<=W<=1.4; the thickness of an obtained steel plate is smaller than or equal to 6 mm, and according to the steel plate performance, the yield strength is larger than or equal to 355 MPa; and the surface irregularity of the steel plate is smaller than or equal to 8 mm / 2m.

The invention relates to a PPH auxiliary instrument facilitating suture. The PPH auxiliary instrument comprises a suture device main body and a suture protection plate. The suture device main body ismatched with a suture protection plate. The suture device main body comprises a guide part, a suture part and a fixing part. The suture part is provided with a suture window layer, and each suture window layer is composed of at least one suture window. The distal end of the suture part is provided with the guide part, and the proximal end of the suture part is provided with the fixing part. The guide part is in the shape of a purse. The fixing part is provided with a hollow hole. The suture protection plate comprises a main body plate and an outer side plate. The main body plate and the outerside plate are angularly distributed. The outer side plate is provided with a suture fixing hole. The invention has the advantages that the PPH auxiliary instrument facilitating suture simultaneouslyhas functions of anus expanding and suture, reduces instrument insertion, is convenient for operation and has a good suture effect.

The present invention relates to novel oligonucleotides which comprise p53 5′-UTR sequence TCCCTGG (SEQ ID NO: 1) or the complementary p53 3′-UTR sequence CCAGGGA (SEQ ID NO: 2) and their use for such therapeutic applications as protection of normal tissues from the toxicities of chemical or radiation exposure; reducing tissue damage in hypoxia-reperfusion injury, neurodegenerative disorders, oxidative stress, injuries, hyperthermia; preventing aging; preservation of tissues and organs prior to transplanting, etc.

The invention discloses integral gear quenching equipment and a process thereof. The integral gear quenching equipment comprises a base and a gear positioning device, wherein the gear positioning device is located on the base and is used for fixing a gear, gear quenching equipment is arranged above the gear positioning device, the gear quenching equipment comprises a longitudinal adjustment fixedseat, a heating device and an oil spraying and cooling device which are arranged on the longitudinal adjustment fixed seat and are matched with a tooth groove of the gear, the heating device and the oil spraying and cooling device are connected with a gear monitoring system which is used for monitoring the gear processing state in real time by virtue of a controller, the gear is fixed to a platform on the base by the gear positioning device, and the position and the precision of the heating device and the oil spraying and cooling device are controlled by the controller according to quenching depth requirements so as to integrally quench the load surface of the gear. The gear quenching equipment has the advantages of integrality in quenching and simple method, the product quality and yieldare obviously increased, and processed gear teeth have the advantages of high strength, good wear resistance, long service life and high bearing capacity.

The invention discloses a manufacturing method of a molybdenum target tube material. The method is that molybdenum powder is used as the raw material. The method comprises the steps of preparing a molybdenum ingot; mechanically processing for the first time; extruding; thermally processing; mechanically processing for the second time to obtain the final product. The method has the advantages of being simple in process, low in production cost, high in purity of target material, high in density, low in oxygen content, large in length, uniform in structure, and small in crystal grains.

This invention relates to a contactor material of a high voltage vacuum arc-suppressing chamber in a vacuum switch, its weight percentage composition is: Mo18-22%, W3-7%, Cr3-7%, the rest is Cu. The Mo, W, Cr powder materials mixed uniformly in terms of the composition ratio are prepared by penetrating Cu with high temperature penetration method. This invented contactor material has super low oxygen content, uniform organization, good performance of arc suppression.

The invention provides a Zr-Ti-Nb alloy and a preparation method thereof, and belongs to the technical field of powder metallurgy. The Zr-Ti-Nb alloy provided by the invention comprises the following element components in percentage by mass: 20-40% of Zr, 10-60% of Ti and 20-50% of Nb. According to the invention, Zr, Ti and Nb can form an infinite solid solution through the solid solution effect in the sintering process, the strength of the alloy material is effectively improved, the solid solution effect can also enable the crystal form of the alloy to be converted into a body-centered cubic structure with strong deformability from a close-packed hexagonal structure, and the plasticity of the alloy material is effectively improved. Besides, the Nb element is added, so that the mixing entropy and the mixing enthalpy of the alloy can be influenced, the valence electron concentration of the alloy is changed, the phase composition of the alloy is influenced, the dislocation motion resistance of the alloy is improved, the processing hardening rate of the alloy is increased, and the purpose of improving the strength of the alloy is achieved.

The invention provides a high heat resistance welding wire for dissimilar steel welding joints, which is composed of the following elements in weight percent: C: 0.08-0.20%; Si: 0.02-0.30%; Mn:0.40-1.00%; Ni:0.10-0.30%; P less than or equal to 0.0090%, S less than or equal to 0.0090%; Cr:4.50-5.50%; Mo:0.80-1.30%; V: 0.10-0.40%; Al less than or equal to 0.050%; N: 0.010-0.090%; Nb: 0.010-0.070%; and the balance of Fe. The invention further provides a preparation method for a highheat resistance welding wire and application thereof to dissimilar steel welding joints. The highheat resistance welding wire provided by the invention has good heat resistance, and can reduce contents, structure and mechanical property gradient of the dissimilar steel welding joints.

The invention discloses a campus smart competition processing method and device, a storage medium and a server. The campus smart event processing method comprises the following steps: receiving campus event information configured by a teacher at a teacher terminal and registration information configured by students at a user terminal; storing the registration information according to a preset knowledge graph; receiving score information, measured by the event terminal, of the registered student; generating test statistical information according to the score information, and storing the score information and the test statistical information according to a knowledge graph, wherein the test statistical information at least comprises event ranking and event completion degree. According to the invention, the technical problem of high manpower, organization and statistics costs is solved.

The invention provides a precise forging-continuous rolling production technology of a large and heavy single molybdenum rod. The production technology comprises the following steps of: 1, carrying out billet forging on the molybdenum rod by a precision forging machine to obtain a precision forging bar; 2, heating the precision forging bar; 3, rolling for the first time by a Y-shaped three-roller continuous mill to obtain a rolled molybdenum rod; 4, heating the rolled molybdenum rod; and 5, rolling for the second time by the Y-shaped three-roller continuous mill and obtaining the large and heavy single molybdenum rod of which the piece weight is 45-50kg. Deep processing of a molybdenum bar is successfully achieved by setting and optimizing each parameter in precision forging, thermal treatment and continuous rolling processes; the large and heavy single molybdenum rod, which is suitable for subsequent wire drawing, and of which the piece weight is 45-50kg, is finally produced; and the production efficiency is obviously improved. The piece weight of the molybdenum rod produced by the production technology is much greater than that of the molybdenum rod produced by a traditional technology; and the precise forging-continuous rolling production technology has no welding spot on the whole, and is even in internal organization, high in product quality and suitable for large-scale industrial production.

The invention discloses an abrasion resistance treatment method for a sliding bearing of a centrifugal machine. The abrasion resistance treatment method comprises the steps that firstly, the sliding bearing is subjected to heating and heat preservation treatment, and then cooling is carried out; secondly, nitrogen treatment is carried out; thirdly, the sliding bearing is washed and treated through a cocoyl sodium methyl taurate solution; and fourthly, heating and heat preservation treatment are carried out. By means of the abrasion resistance treatment method for the sliding bearing of the centrifugal machine, the surface hardness and the abrasion resistance of the sliding bearing can be remarkably improved, the friction coefficient is reduced, the surface material structure and performance of an inner ring and an outer ring of the bearing are greatly improved, grains on a surface layer are refined, the impurity content of the surface layer is greatly reduced, the resistance of dislocation movement is increased, meanwhile, the plasticity and tenacity are also improved by different degrees, when the sliding bearing works in the centrifugal machine, especially after the sliding bearing works at the 117 % load for a long time, the sliding bearing can still keep a good running state, abrasion is slight, the abrasion amount is small, the service life of the sliding bearing is greatly prolonged, and the working efficiency of the centrifugal machine is improved.

The invention belongs to the technical field of steel production, and relates to a production method and system for controlling the male and female surfaces of a double-high-speed bar, and the system comprises a pre-finish rolling segmentation unit, a finish rolling unit, a high-speed flying shear, a tail clamping brake and a cooling bed which are sequentially arranged in the rolling production direction; the finish rolling unit comprises a first finish rolling unit, a flying shear before finish rolling, a second finish rolling unit and a cooling water tank which are connected in series in the rolling production direction; the cooling water tanks are arranged behind the pre-finish rolling cutting unit, the first finish rolling unit and the second finish rolling unit; and a pinch roll for clamping a rolled piece is arranged behind the cooling water tank. In the invention, the finish rolling unit adopts a multi-line parallel mode, and each branch is independently controlled and does not influence each other, so that female and male surface control and efficient production of the double-high-speed bar are realized through the cooling water tank, the pinch roll, the diameter measuring instrument and the temperature measuring instrument which are independently controlled. Differentiation control is carried out on control parameters of all branches according to the actual situation, and the differences of the structures and the mechanical properties of products of all the branches are reduced.

The invention discloses a nickel-based target and a production process. The production process comprises working procedures of cold rolling, high-temperature vacuum heat treatment, ammonia atmosphere protective heat treatment, primary rolling, welding, precision rolling, annealing and the like. The production process has no high-temperature processes of smelting, hot rolling and the like, and also has no high-pollution processes of acid washing, alkali washing and the like. Therefore, compared with the conventional process, the production process reduces the energy consumption by 30 percent and the metal loss by 50 percent, improves the one-time yield by over 10 percent, has high comprehensive utilization rate of resources, and is environmentally-friendly; and the process is simple and convenient to operate, can effectively guarantee the purity of a electrolytic nickel thin plate, improve the comprehensive mechanical property and physical property of the electrolytic nickel thin plateand replace the prior production process for smelting and hot-rolling the nickel target, and is suitable for industrialized production.

This invention relates to a contactor material of a high voltage vacuum arc-suppressing chamber in a vacuum switch, its weight percentage composition is: Mo18-22%, W3-7%, Cr3-7%, the rest is Cu. The Mo, W, Cr powder materials mixed uniformly in terms of the composition ratio are prepared by penetrating Cu with high temperature penetration method. This invented contactor material has super low oxygen content, uniform organization, good performance of arc suppression.

The invention provides an integral die forging forming method for a spherical shell of a manned cabin of a titanium alloy bathyscaph. The integral die forging forming method comprises the steps that a forge piece drawing is designed; a bar is blanked, and the bar is subjected to multiple times of upsetting; the forging temperature is T beta-(30-50 DEG C), and the deformation amount is 30%-55%; the forging temperature is T beta + (5-30 DEG C), and the deformation amount is 20%-50%; the forging temperature is T beta-(30-50 DEG C), and the deformation is 10%-20%; and heat treatment. The bathyscaph manned cabin spherical shell with the three outlook holes is integrally formed in a die forging mode, welding seams are eliminated, the welding risk and the overall production cost are reduced, the connection strength between the outlook holes and the spherical shell is guaranteed, and weak links are prevented.

The invention discloses an Al-Li-W aluminum lithium alloy and a machining technology thereof, wherein the Al-Li-W aluminum lithium alloy has combustion resisting performance when being smelted at thetemperature ranging from 700 DEG C to 800 DEG C. The alloy comprises chemical components including, by weight percent, 2.0 wt.%-8.0 wt.% of Li, 1.0 wt.%-3.0 wt.% of W, 2.0 wt.%-4.0 wt.% of Ca, 1.0 wt.%-5.0 wt.% of Sr, 0.2 wt.%-0.3 wt.% of Eu, 0.1 wt.%-0.2 wt.% of Ce, 0.2 wt.%-0.4 wt.% of Ho, 1.2 wt.%-2.8 wt.% of B and the balance Al. Through the preferable alloying method, the defect of the alloyelement usage amount can be greatly reduced, a very good flame retarding effect can be achieved as well, the content of flame retarding elements is obviously reduced, and meanwhile the alloy combustion point is greatly increased. Obvious combustion is avoided when heat preservation and standing are conducted for 5 h at the atmospheric environment at the temperature ranging from 700 DEG C to 800 DEG C. The material has the mechanical performance of a traditional aluminum lithium alloy, the yield strength ranges from 400 MPa to 650 MPa, the tensile strength ranges from 500 MPa to 750 MPa, and ductility ranges from 4% to 15%. The material has the high thermal conductivity performance not achieved in the traditional aluminum lithium alloy, the thermal conductivity coefficient ranges from 120 W / m.K to 140 W / m.K, and the thermal conductivity coefficient of the traditional aluminum lithium alloy is about 85 W / m.K.

The invention relates to an industrial furnace capable of realizing the thermal shift and atmospheric uniformity of a gas flow field, which comprises a furnace body, thermocouples, a feeding table, a discharge table, driving rollers and furnace doors. A preheated section on the front section of a hearth is connected with the input end of an air compression pump by an air suction pipe, a filter and a cooler; one path of the output end of the air compression pump is communicated with a group of vertical convection injection pipes arranged in a cooling area on the rear section of the hearth; andthe vertical convection injection pipes run through the furnace body to be arranged in corresponding vertical convection guiding tubes to form jet flow structures. The industrial furnace has the advantages that: the technology can solve technical difficulties in the furnace gas flowing, circulation, thermal energy shift and the like of a large furnace and reduce temperature differences by temperature control; and the thermal energy of the furnace section required to be cooled is shifted to the furnace section required to be heated according to a thermal treatment process curve, thereby greatly reducing thermal treatment energy consumption, simultaneously avoiding a great amount of heat being discharged out of the furnace, improving the cleaning production level and improving the working environment of workers.

The invention discloses a solid core wire for gas protection welding of high manganese low temperature steel. The solid core wire is characterized by comprising the following chemical composition in percentage by mass: 0.2-0.4% of C, 12-15% of Mn, 14-18% of Ni, 1.5-4.5% of Cr, 0.1-0.6% of Mo, 0.005-0.040% of Ti, no more than 0.004% of P, no more than 0.002% of S and the balance Fe and inevitable impurity elements. The solid core wire adopts the alloy design of composite manganese and nickel adding, the content of expensive elements such as nickel and the cost of alloy are reduced, the fact that the excessive amount of manganese forms excessive toxic manganese evaporation in the welding process is avoided, the use performance of the wire is improved, the weld metal formed by the solid corewire at low temperature of minus 196 DEG C has excellent impact toughness, and the welding requirements of the high manganese low temperature steel for the construction of liquefied natural gas storage tanks and other equipment are well met.