168results about How to "Raise the intensity level" patented technology

A system for producing a contrast-enhanced medical image of a patient includes a source of a contrast or enhancement medium, a pressurizing unit in fluid connection with the source of contrast or enhancement medium, an energy source operable to apply energy to a region of the patient, an imaging unit providing a visual display of an internal view of the patient based upon a signal resulting from the energy applied to the region of the patient, and a control unit. In an embodiment, the signal is affected by a condition of the contrast or enhancement medium in the patient. To control the procedures, the control unit adjusts the condition of the contrast or enhancement medium in the patient based upon the signal. A communication interface preferably enables information between an injector subsystem and an imaging subsystem.

A neurostimulation system and method of treating a patient. Electrical stimulation energy is delivered to a target tissue site in accordance with a stimulation parameter to treat the patient and evoke at least one compound action potential (CAP) in a population of neurons. A magnitude of the evoked CAP is measured. A function of the measured evoked CAP magnitude(s) is compared to a threshold value. The stimulation parameter is adjusted based on the comparison.

The invention relates to a manufactured sand underwater dispersion resistant concrete, which comprises the following components in parts by weight: 100 parts of cement, 1-5 parts of underwater dispersion resistant additive, 2-20 parts of silica fume, 1-20 parts of coal ash, 1-10 parts of an enhancer, 140-200 parts of manufactured sand, 140-200 parts of macadam, and 30-50 parts of water. The preparation method comprises the following steps of firstly putting the manufactured sand, the macadam aggregate, the cement, the enhancer, the coal ash and the silica fume into an agitator, blending through dry mixing, then adding the underwater dispersion resistant additive to further blend through dry mixing, adding water into the material blended through dry mixing previously, stirring for 5-8 minutes, then preparing the manufactured sand underwater dispersion resistant concrete. The manufactured sand underwater dispersion resistant concrete has strong construction mobility, so that the problem of contradiction of mobility and dispersion resistance of the underwater dispersion resistant concrete is better solved, and therefore, the manufactured sand underwater dispersion resistant concrete not only has good dispersion resistance, but also has self-leveling and self-compaction construction mobility.

The invention provides a preparation method for antistatic cement-based self-levelling surface-layer mortar. The preparation method comprises: selecting high-aluminium cement, aluminium cement, Portland cement, fly ash, desulfurized gypsum, quartz sand, mine tailing sand, carbon fiber, graphite powder, redispersible latex powder, cellulose ether, a water reducer, an antifoaming agent, a rapid-setting early-strength agent and a retarder as raw materials, preparing according to a ratio, and uniformly mixing in a high-speed mixer at a rotation speed of 60-200 r/min for 8-10 min, so as to prepare the antistatic cement-based self-levelling surface-layer mortar. By adding a large amount of fly ash and other industrial waste slag, wastes are changed into valuables, a large amount of source is saved, and considerable social economic benefit is brought. Carbon fiber and graphite powder in the raw materials possess electric conductivity and form a stereo point-line-surface interlaced three-dimensional electric-conduction system in a mortar hydrate through combined usage, and exhaust and release of static electricity are facilitated. Additionally, cast self-levelling surface-layer mortar is flat in surface, also is capable of reducing sound of vehicles rolling ground, and is applicable to ground leveling and decoration of a place needing to prevent static electricity.

The disclosure relates to an aluminium-base weld filler alloy having the following composition in weight percent: Mg 5.0-6.5, Mn 0.4-1.2, Zn 0.4-<2.0, Zr 0.05-0.3, Cr 0.3 max., Ti 0.2 max., Fe 0.5 max., Si 0.5 max., Cu 0.25 max., balance Al and inevitable impurities. Further, the disclosure relates to a method of manufacturing an aluminium-base weld wire, and to a method of constructing welded constructions.

The invention discloses a preparation method of high-performance carbonized reinforced concrete, and the method comprises the following steps: mixing steel slag, a hydraulic cementing material, a carbonized reinforced phase and quartz sand, adding water and a water reducing agent, stirring, and carrying out casting molding on the stirred slurry; sealing and maintaining the molded product for 12-24hours, removing a mold, and carrying out drying pretreatment; and putting the dried product into a carbonization kettle with a CO2 atmosphere and an air pressure of 0.1-0.5 MPa, and carrying out carbonization maintenance for 12-24 hours to obtain a steel slag product. The high-performance carbonized reinforced concrete prepared by the invention has excellent working performance; the hydrated andcarbonized synergistic effect of the hydraulic cementing material and the steel slag is fully utilized, the compressive strength can reach 100 MPa within a short time, meanwhile, the utilization rateof the steel slag is remarkably increased, a large amount of CO2 can be solidified and stored, huge environmental benefits are achieved, development of green building materials is facilitated, and a sustainable development road is achieved.

The invention relates to the technical field of alloy production, particularly a powder alloy and a production technique thereof. The powder alloy comprises 0.04-0.09% of C, 12-14% of Cr, 7-9% of Co, 3.3-3.7% of W, 3.3-3.7% of Mo, 2.3-3.7% of Al, 3.3-2.7% of Ti, 3.3-3.7% of Nb, 0.006-0.015% of B, 0.03-0.07% of Zr and the balance of Ni. The powder alloy is a highly-alloyed r'-phase precipitation-reinforced nickel-base high-temperature alloy, wherein the r' volume content is 50-55%, and the r' formed element content (atomic) is 28%. The powder alloy is a turbine disk material at the highest strength level under the operating condition of 650 DEG C at present. The powder alloy not only can be used for high/low-pressure turbine disks, but also can be used for gas compressor disks, turbine shafts, turbine baffle rings, high-temperature sealing parts and other high-temperature parts. The powder alloy is prepared by a plasma rotating electrode powder manufacturing apparatus, and the powder quality is greatly enhanced.

The invention discloses a high-specific-strength and high-specific-modulus aluminum alloy material, a preparation method thereof and a component machined by the material. The aluminum alloy is prepared from, by weight, 0.60-1.70% of Mg, 0.85-1.80% of Si, 0.80-2.40% of Li, no more than 0.50% of Mn, no more than 0.50% of Cu, no more than 0.50% of Zn, 0.50% of Fe, no more than 0.50% of Cr, no more than 0.25% of Ti, no more than 0.25% of Zr, no more than 0.05% of each of other elements, and the balance Al, and the total content of the other elements is no more than 0.15%. The preparation method comprises the steps that an alloy ingot is manufactured, the alloy ingot is subjected to homogenizing heat treatment, deformation machining is conducted on the alloy ingot after the homogenizing heat treatment to obtain the alloy material of a required specification, the alloy material is subjected to solution heat treatment and cooled to the room temperature quickly, and the alloy material is subjected to aging heat treatment to obtain good performance matching. The high-specific-strength and high-specific-modulus aluminum alloy material has excellent specific strength and specific modulus performance and is an ideal material of modern manufacturing structure lightweight components.

The invention relates to a compound concrete corrosion remover. Aiming at the serious hazard brought to concrete by corrosion, the foreign standards and the advanced technical ideas are used for reference so as to improve the anti-corrosive property of the concrete starting from improving four technical points of intensity, compactness, reduction of bleeding and rust resistance of the concrete. The compound concrete corrosion remover changes the prior concrete corrosion prevention thought and technical means. The developed compound concrete corrosion remover can ensure that the concrete has good comprehensive anti-corrosive property. Besides, the compound concrete corrosion remover can improve the construction operation working performance, improve the workability, the cohesive quality and the water preserving capability, and improve the slump and the pumpability. While satisfying the anti-corrosive property, the compound concrete corrosion remover still has the performances of a water reducing agent, a pumping agent and a waterproofing agent. The application of the compound concrete corrosion remover can substantially improve the lasting quality and the comprehensive corrosion resistance of the concrete, remarkably prolong the service life of a building and bring remarkable economic and social benefits.

The invention relates to lithium-containing molding material mixtures comprising a refractory main molding material, an inorganic binder, and amorphous silicon dioxide as an additive in the production of molds and cores for metal casting. The invention further relates to a method for producing molds and cores using the molding material mixtures and to molds and cores produced according to the method.

The invention discloses a recycled concrete load-bearing thermal insulation block with three rows of holes, which is characterized in that the block is composed of walls and ribs, and the gaps between the walls and ribs are holes. The holes are filled with insulation boards. Crush construction waste into recycled aggregate, and make recycled fine aggregate and recycled coarse aggregate; weigh cement, water, recycled fine aggregate and recycled coarse aggregate according to the formula, and mix cement: water: recycled fine aggregate : Regenerated coarse aggregate = 375: 150: 664: 811 weight ratio mixing, mixing evenly, through the block forming machine to make a three-row hole recycled concrete load-bearing block with a compression ratio of 0.86; fill the insulation board to the three-row hole regeneration In each hole of the concrete load-bearing block, it is verified by experiments that the block of the present invention has higher compressive strength, has increased heat conduction paths and heat preservation materials, and has better heat preservation effect.

The invention discloses a prestressed concrete hollow square pile comprising a plurality of independent main steel reinforcements. Both ends of each main steel reinforcement are respectively fixedly connected with square end plates; the main steel reinforcements are externally sleeved with steel reinforcement cage racks; each steel reinforcement cage rack comprises a spiral steel reinforcement, and the spiral steel reinforcement is welded with a plurality of auxiliary steel reinforcements; concrete is poured outside the main steel reinforcements and the steel reinforcement cage racks and is combined with the main steel reinforcements and the steel reinforcement cage racks into an integral square pile; and the center of the integral square pile is provided with a central circular hole penetrating through an integral square pile body. The invention aims at providing the prestressed concrete hollow square pile which has the advantages of good molding quality, high single-pile bearing capacity, undamaged steel reinforcement framework before the steel reinforcement framework is used, convenient production, good horizontal anti-bending bearing capacity, high shearing resistant property, convenient stacking and difficult knock damage during pile hoisting, transportation and transferring. The invention also aims at providing a production method of the prestressed concrete hollow square pile.

The invention relates to a large-swelling-amount welded tube and a manufacturing method thereof, belonging to the technical field of welded tube steel. The welded tube contains the following chemical components in percentage by mass: 0.02-0.10wt% of C, 2.0-6.0wt% of Mn, 0.2-1.0wt% of Si, less than 0.01wt% of S, less than 0.02wt% of P and the balance of Fe and inevitable impurities, and can also contain the following one or more chemical components: 0.1-0.6wt% of Ni, 0.1-0.6wt% of Cr, 0.1-0.5wt% of Cu, 0.01-0.1wt% of Nb, 0.01-0.1wt% of V and 0.01-0.02wt% of Ti. The manufacturing method comprises the following steps: performing converter steel making, controlled rolling and controlled cooling; then performing crimping plate processing on steel strips; forming a swollen blank tube through high frequency welding (HFW); and finally performing heat treatment to obtain residual austenite of which the volume fraction is larger than 5% in the structure. The invention ensures that the material has high strength level and simultaneously has high plasticity, the uniform elongation rate is up to 20% or above, and all the mechanical performance indices meet the requirements of API and other relevant standards.

The invention discloses a manufacturing method for improving extensibility of commonly-cooled ferrite lightweight steel. The manufacturing method includes: performing pretreatment before cold rolling, cold rolling and continuous-annealing thermal treatment on thermally-rolled plates, wherein pretreatment before cold rolling includes cold-rolling pre-deformation and recrystallizing annealing. The thermally-rolled steel plates are pretreated before cold rolling to refine high-temperature delta ferrite and improve tissue uniformity of the steel plates after being annealed. By the manufacturing method, high strength of the steel plates is guaranteed while extensibility and strength and elongation product are improved remarkably.

The invention discloses a high-efficiency and energy-saving concrete synergistic agent and a preparation method thereof, and belongs to the concrete technical field. The concrete synergistic agent is prepared from the following raw materials in parts by weight: 10-25 parts of a UFD macromolecular copolymer, 10-15 parts of a water reducing agent mother liquor, 3-5 parts of sodium tripolyphosphate, 2-7 parts of sodium gluconate, 10-15 parts of a stabilizer, and 33-65 parts of water. The UFD macromolecular copolymer is prepared from urea, formaldehyde and sodium dodecylbenzenesulfonate. Through coordinative and promotion effects of the components, the high-efficiency and energy-saving concrete synergistic agent can increase the concrete strength grade, improve the working performance, or reduce the cement use amount under a condition of keeping the concrete working performance and the strength grade basically consistent, so as to achieve the purpose of reducing production cost of the concrete, and then achieve the purposes of saving energy, reducing consumption and reducing environmental pollution. The product production process is simple, and the product storage cycle is as long as one year.

A grinding-promoting and strengthening agent of cement is prepared from triethanolamine (0.8-5 Wt portions), anhydrous sodium sulfate (20-30), powdered coal ash (10-18), sodium carbonate (6-10), sodium chloride (25-33), gypsum (18-25) and sodium carbonate (8-15).

The invention relates to thick steel for supporting a nuclear steam generator and a production method of the thick steel. The thick steel comprises the following chemical components of, by weight percentage, 0.14% to 0.20% of C, 0.25% to 0.40% of Si, 0.30% to 0.40% of Mn, smaller than or equal to 0.008% of P, smaller than or equal to 0.002% of S, 0.30% to 0.60% of Mo, 1.20% to 2.00% of Ni, 0.80% to 1.50% of Cr, 0.01% to 0.03% of V, 0.015% to 0.030% of Al and the balance Fe and inevitable impurities. The thick steel has the advantages that the steel type provided by the invention is relativelyhigh in strength level after being tempered, and the temperature impact absorbed energy and the section fiber fraction of the series of steel type in the tempered state are also kept at a relatively high level.

The invention relates to a heat treatment process for improving obdurability of a near beta type or metastable beta type titanium alloy. The process comprises the following steps of: firstly, preserving heat at the temperature of T which is more than or equal to T beta-50 DEG C and less than or equal to T beta-10 DEG C, wherein the heat preservation time T (min) is eta * delta max, the delta max is the maximum section thickness of a forge piece, the unit is mm, the eta is a heating coefficient, and the value of the heating coefficient eta is 0.5 to 1.5min/mm; secondly, discharging the forge piece out of a furnace and cooling the forge piece to room temperature by air or water; thirdly, preserving heat of the cooled forge piece at the temperature of T which is more than or equal to 520 DEGC and less than or equal to 560 DEG C, wherein the heat preservation time T is more than or equal to 20min and less than or equal to 1.5h; fourthly, discharging the forge piece out of the furnace andcooling the forge piece to room temperature by air; fifthly, slowly heating the cooled forge piece to the temperature of T which is more than or equal to 480 DEG C and less than or equal to 540 DEG Calong with the furnace, wherein the heating rate is controlled to be within 5 DEG C/min, and the heat preservation time T is more than or equal to 6h and less than or equal to 12h; and finally, cooling the forge piece along with the furnace or discharging the forge piece out of the furnace and cooling the forge piece to room temperature by air. The process is suitable for heat treatment of the near beta type or metastable beta type titanium alloy with ultrahigh obdurability so as to obtain a tissue with high comprehensive performance and multi-scale precipitated phases, which has the requiredultrahigh strength (Rm is more than or equal to 1,500 MPa), high plasticity (A is more than or equal to 5 percent) and high obdurability (KIC is more than or equal to 45 MPa.m < 1/2 >), and meet important bearing structural members with ultrahigh obdurability matching required by airplanes.

The invention discloses a chitosan sodium sulfonate containing concrete synergist and a preparation method thereof, and belongs to the field of a concrete additive. The synergist comprises chitosan sodium sulfonate, inorganic base, an epoxy compound, (3-epoxy propoxy propyl) allyloxy dimethoxy silicane, an initiator and water, wherein the initiator is a mixture made from one or more than two of sodium persulfate, potassium persulphate or ammonium persulfate. The preparation method comprises: adding weighed chitosan sodium sulfonate, inorganic base and water to a reaction vessel, then adding the epoxy compound and (3-epoxy propoxy propyl) allyloxy dimethoxy silicane to the reaction vessel; and adding the initiator to obtain the concrete synergist. The synergist improves the dispersity of cement particles, stimulates the action of cement, allows the hydration reaction to be fully carried out, improves the comprehensive properties of concrete, raises the strength level of concrete, saves the concrete consumption by about 10%, and reduces the production cost of concrete.