212 results about "High field strength" patented technology

The invention relates to a high strength low alloy hot rolling ferrite bainite weathering resistant steel and a production method thereof. The steel comprises the components by weight percent: 0.05-0.10% of C, 0.30-0.45% of Si, 1.00-1.50% of Mn, less than or equal to 0.015% of P, less than or equal to 0.01% of S, 0.50-0.70% of Cr, 0.20-0.30% of Ni, 0.20-0.40% of Cu, less than or equal to 0.05% ofAl, 0.01-0.025% of Ti, 0.03-0.05% of Nb and the rest of Fe and impurities; and the yield strength is more than or equal to 450MPa, and the welding cold crack susceptibility coefficient is less than orequal to 0.2. The invention has the advantages of low cost, high strength, low yield ratio, high weatherability, excellent weldability and low temperature toughness, simple process flow of the preparation technique and easy operation. Therefore, the invention can be widely applied to the fields such as bridges, buildings, containers, railway coaches, etc.

In accordance with the present invention is provided a method of treating a subject having a cancerous tumor. The treatment protocol methodology includes injecting the cancerous tumor with an effective dose of plasmid coding for a therapeutic protein followed by administering electroporation therapy to the tumor, the electroporation therapy includes the administration of at least one high voltage, short duration pulse to the tumor.

A circuit arrangement for deriving electrical power from a received electromagnetic field to power a transponder includes a detuning unit connected between two antenna terminals for limiting the power absorbed by the antenna. The detuning unit includes a component having an impedance that passively varies or is actively varied dependent on the field strength of the field prevailing at the antenna. One arrangement of the detuning unit includes two varactor diodes connected anti-parallel between the antenna terminals. Another arrangement of the detuning unit includes a varactor arranged in series between two capacitors between the antenna terminals, a field strength detector, and a controllable voltage source connected to apply to the varactor a control voltage that varies depending on the detected field strength. Thereby, the input impedance varies depending on the field strength, to achieve impedance matching for a low field strength, and a mis-matched condition for a high field strength.

A dielectrophoretic separation device includes a chamber including an inlet and an outlet disposed between the inlet and the outlet. A plurality of three dimensional electrodes are disposed in within the chamber. The electrodes may take the form of a wire or semi-cylindrical conductors disposed on a substrate. At least some of the electrodes include smooth surfaces so as to create an electric field (in response to an applied alternating current) that has a low strength in a region disposed away from the electrodes and an electric field having a high fields strength in a region between adjacent electrodes. Particulate matter or other species experiencing a positive DEP force may be separated and collected in the gaps or regions formed between adjacent electrodes.

A magnetic resonance imaging (MRI) method is disclosed for generating and identifying water and fat separated MR images. Image data is first acquired to obtain two echo images with the water and fat signals orthogonal in the first echo image, and parallel/anti-parallel in the second echo image. The effect of background field inhomogeneties are removed, and water and fat images are separated from each other. The separated water and fat images are identified according to the difference of their precessing frequencies.

An improved magnetic torque transducer involves a method and apparatus for compensating effects of uniform and/or non-uniform magnetic sources by placing three sets of magnetic field sensors around a shaft with at least one magnetized zone. The set of primary magnetic field sensor or sensors is placed proximate to the magnetized zone, both the second and third sets of secondary magnetic field sensors being placed by pre-determined distances to the primary set of magnetic field sensor or sensors, so that primary field sensors always in a position with higher magnetic field strength arise from applied torque than that of secondary sensors. And a method is developed to use the second and third signals from secondary sensors to adjust the primary signal to compensating for the effects of the uniform and/or non-uniform ambient magnetic field sources.

For transmitting data, a receiving/backscattering arrangement receives, modulates and reflects or backscatters electromagnetic waves emitted by a base station. The modulation corresponds to the data to be transmitted and is carried out selectively using first and/or second different modulation methods depending on the received field strength of the received electromagnetic waves. Preferably, phase shift keying is used especially or at least at low field strengths at far range, while amplitude shift keying is used additionally or alternatively for high field strengths at close range. The two modulation methods can be superimposed. A circuit arrangement includes two different modulator arrangements to perform the two modulation methods depending on the received field strength. The second modulator arrangement preferably comprises a multi-stage voltage multiplier circuit with a modulated switching device intervening in one of the stages to achieve the modulation.

Methods and apparatus are provided for fabricating and constructing solid dielectric “Coiled Transmission Line” pulse generators in radial or axial coiled geometries. The pour and cure fabrication process enables a wide variety of geometries and form factors. The volume between the conductors is filled with liquid blends of polymers and dielectric powders; and then cured to form high field strength and high dielectric constant solid dielectric transmission lines that intrinsically produce ideal rectangular high voltage pulses. Voltage levels may be increased by Marx and/or Blumlein principles incorporating spark gap or, preferentially, solid state switches (such as optically triggered thyristors) which produce reliable, high repetition rate operation. Moreover, these pulse generators can be DC charged and do not require additional pulse forming circuitry, pulse forming lines, transformers, or an output switch. The apparatus accommodates a wide range of voltages, impedances, pulse durations, pulse repetition rates, and duty cycles. The resulting mobile or flight platform friendly cylindrical geometric configuration is much more compact, light-weight, and robust than conventional linear geometries, or pulse generators constructed from conventional components. Installing additional circuitry may accommodate optional pulse shape improvements. The Coiled Transmission Lines can also be connected in parallel to decrease the impedance, or in series to increase the pulse length.

The dielectric ceramic has a composition represented by general formula 100(Ba_1-x-ySr_xCa_y)_m(Ti_1-zZr_z)O₃+aBaO+bR₂O₃+cMgO+dMnO+eCuO+fV₂O₅+gX_uO_v (where R is a rare-earth element such as La, Ce or Pr; and X_uO_v is an oxide group including at least Si); and 0≦x≦0.05, 0≦y≦0.08 (preferably 0.02≦y≦0.08), 0≦z≦0.05, 0.990≦m, 100.2≦(100 m+a)≦102, 0.05≦b≦0.5, 0.05≦c≦2, 0.05≦d≦1.3, 0.1≦e≦1.0, 0.02≦f≦0.15, and 0.2≦g≦2. With this composition, a monolithic ceramic capacitor retaining good dielectric characteristics and temperature characteristics even if a high field strength voltage is applied by further thinning the dielectric layers thereof and having excellent reliability achieving good isolating property, dielectric strength, and high-temperature load life is obtained.

A high strength and high thermal conductivity copper alloy tube contains: Co of 0.12 to 0.32 mass %; P of 0.042 to 0.095 mass %; and Sn of 0.005 to 0.30 mass %, wherein a relationship of 3.0≦([Co]−0.007)/([P]−0.008)≦6.2 is satisfied between a content [Co] mass % of Co and a content [P] mass % of P, and the remainder includes Cu and inevitable impurities. Even when a temperature is increased by heat generated by a drawing process, a recrystallization temperature is increased by uniform precipitation of a compound of Co and P and by solid-solution of Sn. Thus, the generation of recrystallization nucleuses is delayed, thereby improving heat resistance and pressure resistance of the high strength and high thermal conductivity copper alloy tube.

The present invention provides a system and method of MR scan prescription to achieve in a fast, simple, and effective manner the optimal peak excitation field strength for a given pulse shape and flip angle such that the minimum TR for the MR scan can be optimized and based on SAR constraints. The present invention provides a technique to obtain optimal B₁ parameters for an arbitrary shape and flip angle of an excitation pulse in real-time while satisfying SAR and/or RF hardware limits to determine the minimum achievable repetition time for a pulse sequence. The present invention is particularly applicable with breath-hold and cardiac imaging techniques that are carried out at relatively high field strengths.

The invention relates to a brazed aluminum alloy foil with high strength and high corrosion resistance and a manufacturing method thereof. The brazed aluminum alloy foil comprises the following chemical ingredients in percentage by weight: 1.00-1.80 percent of Mn, 0.40-1.20 percent of Si, 0.50-1.30 percent of Fe, 0.10-0.50 percent of V, 0.05-0.25 percent of Cr, 0.06-0.25 percent of Zr, 0.08-0.30 percent of Ti, less than 0.03 percent of Cu, other added metals, and the balance of Al and unavoidable impurities. The ingredient alloys have high strength, high corrosion resistance and favorable shaping property; according to an ASTMG85-A3 standard, the brazed aluminum alloy foil with the thickness of 0.08mm, rolled by the alloys, has the penetration resistance time of over 15 days under the test , the corrosion resistance of three times of that of a 3003 alloy, and the tensile strength improved more than 15 percent under the same state.

A practical semiconductor radiation detector capable of collecting electrons rapidly with a large volume is disclosed. A multiple layers of grid electrodes around an anode formed on a semiconductor element limits the generation of the induced charge signal for the anode to the space in the neighborhood of the anode, while at the same time making it possible to collect the electrons rapidly. As a result of limiting the space for generating the induced charge by the grid electrodes, the energy resolution is improved even for a thick semiconductor element. Also, the capability of rapidly collecting the electrons due to the high field strength generated by the grid electrodes makes a sensitive volume of the whole semiconductor and thus achieves a high radiation detection efficiency.

In magnetic resonance tomography apparatus and method for determining the field strength of high-frequency pulses which are emitted during a magnetic resonance measurement by the antenna, a magnetic resonance signal excited by a radio-frequency pulse or a radio-frequency pulse sequence is measured, and a phase of the magnetic resonance signal is determined. Based on this phase, the field strength is then determined.

A powdered catalyst for synthesizing high-strength and high-quality diamond with low cost contains proportionally Ni, Mn, C, N, O, one or more of Cr, Ce and Si, and Fe. The resultant diamond has high output rate, integrity, transparency and thermal stability.

A method is provided for the manufacture of steel steel strip having high strength and high ductility. The method includes hot rolling steel consisting essentially of in weight percent C 0.05/0.20, Mn 3.0/8.0, Si less than 0.5, Al less than 0.1, the balance Fe and inevitable impurities at a minimum finishing temperature of Ar1+50 C, cooling the hot rolled steel strip at a rate sufficient to ensure that the microstructure of the strip consists of greater than 50 percent by volume of martensite, and then annealing the steel strip at a temperature within the range of Ac1 to Ac1+50° C. for a minimum time at temperature of one hour. The steel has a microstructure after annealing that consists essentially of ferrite and retained austenite.

The invention discloses steel with good property and ultra-high strength for engineering machinery and a manufacturing method thereof. The steel comprises the following components by weight percent: 0.15 to 0.20 percent of C, 0.35 to 0.55 percent of Si, 0.95 to 1.35 percent of Mn, at most 0.013 percent of P, at most 0.0030 percent of S, 0.75 to 1.25 percent of Cr, 0.45 to 0.65 percent of Mo, 0.0010 to 0.0020 percent of B, 0.005 to 0.013 percent of Ti, 0.010 to 0.030 percent of Nb, 0.030 to 0.070 percent of Al, at most 0.0060 percent of N, at most 0.0030 percent of O, 0.001 to 0.004 percent of Ca, and Fe and inevitable impurities in balance. The invention optimizes the DQ and offline tempering process, adopts the ausforming process, ensures that the microscopic structure of finished steel plates becomes fine low-carbon tempered martensite and the average colony size is smaller than 20 micrometers, obtains ultra-high strength steel plates with good low-temperature flexibility, weldability and anti-delay cracks, solves the problem of overquenching of superficial layers of the ultra-high strength steel plates, and is particularly applicable to equipment manufacturing industries of large-scale engineering machinery and the like.

The invention relates to a device and a method for generating a pulsed (intermittent), cold, atmospheric pressure plasma, preferably a thread, for precise antimicrobial plasma treatment (antisepsis, disinfection, sterilization, decontamination) of very small surfaces and cavities, including on living human and animal bodies, preferably in the field of medicine, by means of a negative direct-current corona discharge, the device comprising at least one electrode for generating high field strengths, through or around which electrode the gas to be ionized flows in a gas channel, wherein the electrically conductive structure (surface, cavity) to be treated is used as the counter-electrode. Said plasma can also be used in general for cleaning, coating, activating, and etching surfaces.

The invention relates to rare earth containing H profile steel with high strength and high toughness and a production method thereof, and belongs to the technical field of metallurgy and moulding. The raw material comprises 90wt% of blast furnace molten iron and 10wt% of high quality steel scrap. The casting blank comprises the following components in percentage by weight: 0.07-0.12% of C, 0.10-0.30% of Si, 1.40-1.70% of Mn, less than or equal to 0.020% of P, less than or equal to 0.010% of S, 0.30-0.60% of Cr, 0.20-0.50% of Ni, 0.06-0.20% of V, 0.01-0.03% of Ti, 0.01-0.01% of Al, 0.0005-0.010% of rare earth element RE, less than 0.10% of Cu and the balance of Fe and microelements which cannot be detected. The process flow is as follows: molten iron pre-treatment; smelting by a top-bottom combined blowing converter; refining by an LF (Ladle Furnace); VD (Vapor Distillation) vacuum treatment; continuous casting of square billets; cutting; heating the casting blank; dephosphorization by high pressure water; BD1 cogging; BD2 central rolling; dephosphorization by high pressure water; CCS (Cold Crushing Strength) universal rolling; straightening; cooling; flaw detection; and saw cutting. The mechanical properties of the steel are as follows: the yield strength is 490-570MPa, the strength of extension is 660-750Mpa, the yield ratio is greater than or equal to 0.80, the ductility is greater than or equal to 25%, and the horizontal impact value: aKV is greater than or equal to 100J/cm<2> (minus 40 DEG C). The product provided by the invention has the characteristics of low content of impurity elements, high strength, good toughness and excellent welding performance.

An RF coil suitable for use in imaging systems is provided which coil has a dielectric filled cavity formed by a surrounding conducting enclosure, the conducting enclosure preferably being patterned to form continuous electrical paths around the cavity, each of which paths may be tuned to a selected resonant frequency. The patterning breaks up any currents inducted in the coil and shortens path lengths to permit higher frequency, and thus higher field strength operation. The invention also includes improved mechanisms for tuning the resonant frequency of the paths, for selectively detuning the paths, for applying signal to the coil, for shortening the length of the coil and for controlling the field profile of the coil and the delivery of field to the object to the image.

The invention relates to an X80 hot rolled steel plate with good toughness, high strength and low tensile ratio and a production method thereof, and belongs to the technical field of low-carbon structural steel production. The plate blank comprises the following components: 0.02 to 0.08 percent of C, 0.01 to 0.35 percent of Si, 1.40 to 1.85 percent of Mn, less than or equal to 0.015 percent of P, less than or equal to 0.004 percent of S, 0.01 to 0.06 percent of Alt, less than or equal to 0.008 percent of N, less than or equal to 0.0002 percent of H, 0.008 to 0.02 percent of Ti, 0.03 to 0.11 percent of Nb, 0.01 to 0.35 percent of Mo, less than or equal to 0.90 percent of Ni, Cr and Cu complex additive, and the balance of Fe and inevitable impurity elements. The heating temperature of the plate blank is between 1,120 and 1,220 DEG C; a fist stage of controlled rolling is finished in an austenite recrystallization area, the single-pass pressing rate is 15 to 30 percent, and the final rolling temperature is between 960 and 1,080 DEG C; a second stage of controlled rolling is finished in an austenite non-recrystallization area, and the final rolling temperature is between 770 and 830 DEG C; and the rolled steel is cooled to between 450 and 580 DEG C at a speed of 10 to 30 DEG C per second. The steel plate has the advantages of high strength, good toughness and low tensile ratio.