1523 results about "SQUID" patented technology

Nuclear magnetic resonance (NMR) signals are detected in microtesla fields. Prepolarization in millitesla fields is followed by detection with an untuned de superconducting quantum interference device (SQUID) magnetometer. Because the sensitivity of the SQUID is frequency independent, both signal-to-noise ratio (SNR) and spectral resolution are enhanced by detecting the NMR signal in extremely low magnetic fields, where the NMR lines become very narrow even for grossly inhomogeneous measurement fields. MRI in ultralow magnetic field is based on the NMR at ultralow fields. Gradient magnetic fields are applied, and images are constructed from the detected NMR signals.

A coupling system may include an rf-SQUID having a loop of superconducting material interrupted by a compound Josephson junction; and a first magnetic flux inductor configured to selectively provide a mutual inductance coupling the first magnetic flux inductor to the compound Josephson junction, wherein the loop of superconducting material positioned with respect to a first and second qubits to provide respective mutual inductance coupling therebetween. The coupling system may further include a second magnetic flux inductor configured to selectively provide a second magnetic flux inductor mutual inductance coupling the second magnetic flux inductor to the compound Josephson junction. A superconducting processor may include the coupling system and two or more qubits. A method may include providing the first, the second and the third mutual inductances.

A superconducting flux digital-to-analog converter includes a superconducting inductor ladder circuit. The ladder circuit includes a plurality of closed superconducting current paths that each includes at least two superconducting inductors coupled in series to form a respective superconducting loop, successively adjacent or neighboring superconducting loops are connected in parallel with each other and share at least one of the superconducting inductors to form a flux divider network. A data signal input structure provides a respective bit of a multiple bit signal to each of the superconducting loops. The data signal input structure may include a set of superconducting quantum interference devices (SQUIDs). The data signal input structure may include a superconducting shift register, for example a single-flux quantum (SFQ) shift register or a flux-based superconducting shift register comprising a number of latching qubits.

Various embodiments provide a coupling mechanism, method of activation and a square lattice. The coupling mechanism comprises two qubits and a tunable coupling qubit that activates an interaction between the two qubits by modulation of a frequency of the tunable coupling qubit. The tunable coupling qubit capacitively couples the two qubits. The tunable coupling qubit is modulated at a difference frequency of the two qubits. The difference frequency may be significantly larger than an anharmonicity of the two qubits. The tunable coupling qubit may be coupled to the two qubits by two electrodes separated by a superconducting quantum interference device (SQUID) loop having two Josephson junctions or by a single electrode with a SQUID loop coupling to ground. The SQUID loop is controlled by an inductively-coupled flux bias line positioned at the center of the tunable coupling qubit.

Multiple SQUID magnetometers that include at least two SQUID loops, each of which is composed of at least two Josephson Junctions connected in parallel with superconducting wires, are provided. The SQUID loops are fabricated such that they share a common Josephson Junction. Devices and application that employ the multiple SQUID magnetometers are also provided.

A superconducting quantum interference devices (SQUID) comprises a superconducting inductive loop with at least two Josephson junction, whereby a magnetic flux coupled into the inductive loop produces a modulated response up through radio frequencies. Series and parallel arrays of SQUIDs can increase the dynamic range, output, and linearity, while maintaining bandwidth. Several approaches to achieving a linear triangle-wave transfer function are presented, including harmonic superposition of SQUID cells, differential serial arrays with magnetic frustration, and a novel bi-SQUID cell comprised of a nonlinear Josephson inductance shunting the linear coupling inductance. Total harmonic distortion of less than −120 dB can be achieved in optimum cases.

A gradiometer for measuring properties of a magnetic field and in particular, for measuring magnetic field gradient components, comprising at least two magnetic sensors wherein at least two of the magnetic sensors are arranged to sense the magnetic field component in substantially the same direction. The magnetic sensors may be super conducting quantum interference device (SQUID) magnetometers, Hall probes, flux gates or magneto-resistive magnetometers. The gradiometer also includes a computer processor loaded with an adaptive signal-processing algorithm, for performing adaptive signal balancing of the magnetometer outputs. In a preferred embodiment the gradiometer may comprise at least eight magnetometers in a three-dimensional arrangement, and a set of three orthogonal global feedback coils, one for each direction x, y, z, such that the five independent magnetic field gradient components may be measured. The gradiometer may also be used to measure second or higher order magnetic field gradient components.

A fishing lure made of soft flexible material. The various shapes of the lure resemble fish, bait, squid, lizards, crayfish, jig trailers, swimbaits, reapers, jerk baits, and other shapes. The tail portion of the fish shaped lure normally has a paddle type tail, which when pulled through the water moves horizontally from side to side, imitating the swimming action of fish. These fish lures are often called swimbaits or paddle tails. The lure has a piece of reflective foil, larger than the size of glitter common to prior art, placed on the surface of the lure or within the lure. The reflective strip normally has a holographic design pattern, such as fish scales or other patterns.

The production and use, and in particular, the extraction, separation, synthesis and recovery of polar lipid-rich fractions containing eicosapentaenoic acid (EPA), docosahexaenoic acid (DHA), docosapentaenoic acid (DPA(n-3) or DPA(n-6)), arachidonic acid (ARA), and eicosatetraneonoic acid (C20:4n-3) from microorganisms, genetically modified seeds and marine organisms (including fish and squid) and their use in human food applications, animal feed, pharmaceutical applications and cosmetic applications.

The invention discloses a high-sensitivity magnetic measurement device in an environment field based on disturbance compensation and a realization method thereof. In the method, the low-frequency disturbance compensation in an environment magnetic field is realized by a second feedback branch and a second magnetic flux locking loop, wherein the second feedback branch is composed of a second integrator, a low-pass filter, a second feedback resistor and a feedback coil; and the second magnetic flux locking loop is formed based on the second feedback branch. A super-magnetic conduction sensor established based on the method can realize the high-pass response frequency characteristics for the environment field and the low-pass response frequency characteristics for the circuit noise at the same time, ensures the suppression of the influence of environment field disturbance on SQUID (superconducting quantum interference device) magnetic measurement without influencing the weak signal measurement, and avoids the overflow phenomenon. Based on the super-magnetic conduction sensor, the method is suitable for the application environment in which the frequency of the magnetic field signal tobe measured is higher than the disturbance frequency band (DC-30Hz) of the environment field.

Nuclear magnetic resonance (NMR) signals are detected in microtesla fields. Prepolarization in millitesla fields is followed by detection with an untuned dc superconducting quantum interference device (SQUID) magnetometer. Because the sensitivity of the SQUID is frequency independent, both signal-to-noise ratio (SNR) and spectral resolution are enhanced by detecting the NMR signal in extremely low magnetic fields, where the NMR lines become very narrow even for grossly inhomogeneous measurement fields. Additional signal to noise benefits are obtained by use of a low noise polarization coil, comprising litz wire or superconducting materials. MRI in ultralow magnetic field is based on the NMR at ultralow fields. Gradient magnetic fields are applied, and images are constructed from the detected NMR signals.

A magnetic resonance system, comprising at least one SQUID, configured to receive a radio frequency electromagnetic signal, in a circuit configured to produce a pulsatile output having a minimum pulse frequency of at least 1 GHz which is analyzed in a processor with respect to a timebase, to generate a digital signal representing magnetic resonance information. The processor may comprise at least one rapid single flux quantum circuit. The magnetic resonance information may be image information. A plurality of SQUIDs may be provided, fed by a plurality of antennas in a spatial array, to provide parallel data acquisition. A broadband excitation may be provided to address a range of voxels per excitation cycle. The processor may digitally compensate for magnetic field inhomogeneities.

The invention relates to a marine-fish environmental protective compound feed, consisting of the following materials in weight ratio: 13 to 20 portions of domestic fish powder, 8 to 15 portions of biological fish meal ABP600, 8 to 12 portions of soybean meal, 10 to 18 portions of peanut bran, 3 to 10 portions of corn, 3 to 7 portions of cotton seed meal, 3 to 7 portions of rapeseeds meal, 3 to 5 portions of meat and bone meal, 3 to 5 portionsof squid bowels powder, 20 to 30 portions of high gluten flour, 1.0 to 3.0 portions of blood meal, 1.0 to 2.0 portions of soybean lecithin, 2.0 to 3.0 portions of marine-fish oil, 0.3 to 0.6 portions of choline chloride (50%), 0.05 to 0.1 portions of Vitamin C phosphate (35%), 0.15 to 1.5 portions of calcium biphosphate, 0.2 to 0.5 portions of compound multiplex vitamin, 0.5 to 1.5 portions of compound mineral salt, 0.1 to 0.3 portions of feed attractant, 0.1 to 0.3 portions of micro-bio-preparation, 0.03 to 0.08 portions of A3Alpha peptidoglycan, 0.01 to 0.04 portions of phytase, and 0.04 to 0.08 portions of non-starch polysaccharase. The compound foodstuff can meet the nutrition demands of such high density cultivated marine fishes such as weever, large yellow croaker, American red fish, sparidae fishes, and trachinotus ovatus and rudd etc, and the cultivated objects can rapidly grow and has high foodstuff conversion rate; the compound foodstuff can intensify the immunity and anti-stress ability of fishes and endow them with good vitality, vivid body color and high survival rate; compared with marine fished cultivated by other foodstuffs, the excretion rates of nitrogen and phosphorous of the marine fishes cultivated by the compound foodstuffs is lowered by 10 to 15 percent, and cause smaller contamination to the cultivation water body.

The present invention comprises a high-transition-temperature superconducting device having low-magnitude low-frequency noise-characteristics in magnetic fields comprising superconducting films wherein the films have a width that is less than or equal to a critical width, wC, which depends on an ambient magnetic field. For operation in the Earth's magnetic field, the critical width is about 6 micrometers ( mu m). When made with film widths of about 4 mu m an inventive high transition-temperature, superconducting quantum interference device (SQUID) excluded magnetic flux vortices up to a threshold ambient magnetic field of about 100 microTesla ( mu T). SQUIDs were fabricated having several different film strip patterns. When the film strip width was kept at about 4 mu m, the SQUIDs exhibited essentially no increase in low-frequency noise, even when cooled in static magnetic fields of magnitude up to 100 mu T. Furthermore, the mutual inductance between the inventive devices and a seven-turn spiral coil was at least 85% of that for inductive coupling to a conventional SQUID.

The invention relates to a magnetic-field dynamic compensation system and methods based on spatial correlation, wherein the system can realize the dynamic compensation of environment magnetic fields at the directions of three axles through a large set and a small set of Helmholtz coil racks and two fluxgate meters based on the spatial correlation of a PID (Proportion Integration Differentiation) negative feedback electronic circuit and the fluctuation of the environment magnetic fields. The invention further discloses three methods using the system, including (1) a proportioning type magnetic-field dynamic compensation method, (2) a series type integral magnetic-field dynamic compensation method, and (3) a parallel integral type magnetic-field dynamic compensation method. The system of the invention is easy to construct, has low cost and simple operation, and can achieve excellent dynamic compensation effect, and simultaneously, the methods can maximally eliminate the affects of the fluxgate meters to other magnetic detectors at the centers of coils, and have great application prospect in extremely-low field nuclear magnetic resonance, imaging thereof and other biological magnetic researches based on an SQUID (Superconducting Quantum Interference Device).

The invention relates to a meat vacuum pickling, rolling and rubbing method which comprises the following steps: pickling liquid is prepared, the meat and the pickling liquid are mixed and the obtained mixture is rolled and rubbed in a rolling and rubbing machine, the rolling and rubbing process is carried out in vacuum environment with the vacuum degree of minus 0.05 to minus 0.1MPa. The meat can be fresh meat or unfrozen meat comprising one of chicken meat, duck meat, goose meat, pork, beef, mutton, squid, cuttle fish and cod fish or the combination of two or a plurality of thereof. The pickling liquid comprises drinking water and one of or combination of a plurality of common salt, white granulated sugar, gourmet powder, mirin, soy sauce, starch, flour, isolated protein, phosphate, saleratus, cooking wine, spices, essence, pigments and food modifiers.

The invention provides an aquatic feed which is prepared from soybean waste, steam heated fish meal, fish meal, brewer's yeast, squid meal, shrimp shell powder, choline chloride, flour, calcium dihydrogenphosphate, scallop powder, Ulva lacbuca Linnaeus powder, glutelin powder, phosphatidy icholine, fish oil, palmitic oil, maltose dextrin, amino acid fish grout, vitamins for shrimps, microelements, immunological polysaccharides, copper-methionine and complex enzyme. The invention also discloses the pre-maturing process for the aquatic feed.

The invention relates to a processing method of an instant squid. The method comprises the following steps: live or frozen whole squids which are not polluted, have no abnormality and even size are adopted, cleaned, treated to remove internal organs, cleared and cleaned, cut up, scalded, rinsed, pickled and roasted at high temperature for sterilization, and the instant squid is obtained after mild secondary sterilization. The instant squid comprises various parts such as squid rings, squid tentacles, squid mouths, squid wings and the like, and the nutrients of fresh squids are well kept; besides, the squids have beautiful appearance, and can be eaten after being opened; and the instant squid is characterized by delicious taste, convenient eating and rich nutrition. The method adopts small package, and high-temperature short-time sterilization technology is adopted before vacuum packaging to effectively kill microbes, and measures such as a mild secondary sterilization and the like are taken after packaging, therefore, the shelf life of the squid can reach half a year to one year. The method is simple in preparation, and the procedures are reasonable, simple and feasible, the squid product processed has no nutrition loss and natural color, thus improving the edible convenience of the squid product.

An amplifier and method for improving linear response includes a plurality of N bi-SQUIDs. Each bi-SQUID has a non-uniform bi-SQUID parameter βi, described by βi=2πLiIciΦ0 can be defined for each bi-SQUIDs from i=1 to N, where Li is the loop inductance, ic is the critical current, and Φ0 is a flux quantum for each bi-SQUID. The non-uniform bi-SQUIDs can be connected in series or in parallel to establish a Superconducting Quantum Interference Filter (SQIF) array of bi-SQUIDs. Once connected, a mutual inductance between the connected bi-SQUIDs can be established. If the mutual inductance between connected bi-SQUIDs is accounted for, careful manipulation of the critical current or the loop size, or both, of each bi-SQUID can result in extremely uniform behavior (linear response) of the SQIF when considered as a whole, even though the behavior of the element bi-SQUIDs is non-uniform (different βi, parameters).

The invention relates to an SQUID structure preventing magnetic field interference in non-magnetic shielding environment. The structure is characterized in that an annular superconductive wall is manufactured around a Josephson junction, the superconductive wall surrounds the Josephson junction and achieves a micro magnetic shielding function, and accordingly interference of an imposed magnetic field on the Josephson junction is suppressed. The height of the superconductive wall is larger than the thickness of an insulating layer of the Josephson junction. The annular superconductive wall based on a superconductive film material is manufactured around the Josephson junction serving as the core structure of an SQUID, and the annular superconductive wall can effectively shield the imposed magnetic field from entering the Josephson junction, so that influences of the imposed magnetic field on the Josephson junction are effectively prevented, and stability of SQUID parameters is improved.

According to certain embodiments of the present invention, there is provided a magnetoencephalography and method employing a portable cart having a SQUID dewar mounted in an inverted manner thereon, and having a headrest assembly mounted on the cart for supporting the head of a patient and forming a portion of the dewar. The headrest assembly includes an array of magnetic sensors of the SQUID dewar for responding to electrical activity of the brain of the head.

A flow cytometer. In one embodiment, the flow cytometer has a microfluidic structure defining a channel with a periodically modulated path for transporting a stream of fluid with magnetic particles along the modulated path, and a superconducting quantum interference device (SQUID) sensor positioned over the microfluidic structure to define a detecting zone in the microfluidic structure for detecting magnetic signatures of a magnetic particle passing along the periodically modulated path through the detecting zone, where in use the stream of fluid with magnetic particles is regulated such that each magnetic particle passes singly along the periodically modulated path through the detecting zone.

The invention provides a high-efficient ecological seedling-raising method of blue crabs. The high-efficient ecological seedling-raising method comprises the following steps of: selecting parent crabs after artificial breeding, adopting circulating water to keep the water temperature in an overwintering pond, feeding clam worms, ruditapes philippinarum, squid and other baits for performing intensive culture on the parent crabs, utilizing a single-crab and single-pond mode to perform pond arrangement, and laying disinfection sea mud at the bottom of a larval rearing tank for simulating a sea natural ecological environment. By using the method disclosed by the invention, vertical transmission of diseases can be avoided, the use of coal is reduced, and energy conservation and emission reduction are realized; and the baits can be reasonably matched for promoting the healthy development of embryos, and self-mutilation of larvae can be reduced for improving the yield and the quality of seedlings. According to the method disclosed by the invention, the yield of the seedlings of the blue crabs can be improved by 30-50%, the outdoor farming survival rate can be improved by 10-15%, and the method can be widely applied to offshore sea waters and has significant economic benefits.

A superconducting switching amplifier embodying the invention includes superconductive devices responsive to input / control signals for clamping the output of the amplifier to a first voltage or to a second voltage. The amplifier includes a first set of superconducting devices serially connected between a first voltage line and an output terminal and a second set of superconducting devices serially connected between the output terminal and a second voltage line. The first set and the second set of devices are operated in a complementary fashion in response to control signals. When one of the first and second sets is driven to a superconducting (zero resistance) state the other set is driven to a resistive state. In accordance with the invention, the devices of each set are laid out in a pattern and driven in a manner to enable all the devices of each set to be driven to a selected state at substantially the same time. In one embodiment, the devices in each set are superconducting quantum interference devices (SQUIDs). Four sets of superconductive devices may be interconnected to function as a differential switching amplifier. The operating voltage applied to an amplifier may be varied to provide additional shaping of the output signal.