Hitachi, Ltd.

Minseok Park

Michiya Okada

Tsuyoshi Wakuda

Hideta Habara

Hiroshi Morita

Tomomi Kikuta

Shuya Hagiwara

Hideki Tanaka

Kenji Kawasaki

Momoyo Enyama

Makoto Sakakibara

Takafumi Miwa

Yasuhiro Shirasaki

Masahiro Kayama

Hirokazu Tamaki

Yota Ichiki

Kotoko Urano

Takashi Dobashi

Atsuko Shintani

Sayaka Kurata

Akiko Kagatsume

Thantip Krasienapibal

Gosuke Hayashi

A hot rolling line control system includes a rolling condition setting unit, an operation data collection unit that collects rolling conditions and operation data of a line during rolling, an operation data storage unit, a material measurement data storage unit that stores material actual measurement data obtained by measuring a material of a rolled steel sheet, a material prediction unit that predicts material of rolled steel sheet, and a material prediction data storage unit that stores material prediction data in the material prediction unit, and the material prediction unit includes a classification criteria creation and material model regression unit that creates classification criteria using operation data and the material actual measurement data, classifies the operation data and the material actual measurement data according to the created classification criteria, and regresses the classified operation data and material actual measurement data to create a material model for each classification.

Hot rolling line control system and hot rolling line control method

A measurement system comprising: a measurement apparatus observing a sample based on an observation condition including parameters; and an observation condition database storing data in which a search key related to the sample and the observation condition, a control unit calculating information on an observation condition of a sample is configured to: receive an observation condition search request including a search key related to a target sample; refer the observation condition database to search for the first data matching or similar to the search key related to the target sample included in the observation condition search request, calculate, based on the searched first data, a candidate observation condition of the measurement apparatus for observing the target sample, and output display data for presenting the candidate observation condition.

Measurement system and method for setting observation conditions of measurement apparatus

In a superconducting coil, a parallel conductor includes a plurality of superconducting wires bundled and wound in a coil. The superconducting wires have at least two connections therebetween. A current source connected to the superconducting wires to form a loop via the superconducting wires and the connection to supply a current in the loop when a quench is detected. A superconducting magnet includes the superconducting coil, a persistent current switch connected to the superconducting coil, and a quench detector configured to detect quench occurring in the superconducting coil.

Superconducting coil, superconducting magnet, and method of operating superconducting magnet

A DDS (direct digital synthesizer) remarkably increased in the number of frequencies which can be output while maintaining the phase coherency, and an NMR instrument using such a DDS are provided. A DDS including phase accumulators and a phase-to-amplitude modulator is provided with a plurality of phase accumulators operating with fixed phase implements which are equal to powers of 2, a controller for outputting each bit of a frequency tuning word as control data, a plurality of switches for outputting an output of an associated one of the phase accumulators when an associated one of the control data supplied from the controller is 1 and outputting 0 when the associated one of the control data is 0, and an adder for adding up outputs of the switches.

Direct digital synthesizer and nuclear magnetic resonance instrument using the same

There is provided a superconducting magnet including a superconducting coil, in which the superconducting coil includes: a bobbin; one or more superconducting wires wound around the bobbin in a plurality of turns, each superconducting wire being one or more superconducting filaments embedded in a matrix; and one or more metallic members, each metallic member being in electrical and thermal contact with a plurality of portions of the one or more superconducting wires.

Superconducting magnet

A NMR apparatus includes a probe coil of a superconductor coil made of magnesium 2-boride formed on a surface of a substrate, and a coil bobbin around which the superconductor coil is wound. The substrate is made of a flexible organic material that contains no hydrogen atoms.

Superconductor probe coil for NMR apparatus

An electromagnetic transceiver apparatus for a NMR apparatus has an intermediate frequency generator for preparing an intermediate wave, a transmission frequency converter for preparing, on the basis of an intermediate frequency of the intermediate wave, an electromagnetic wave to be radiated from a transmitter coil, a reception frequency converter for processing a signal received by the NMR probe, an analog-digital converter for converting an output of the reception frequency converter into a digital signal, an IQ detector for performing detection on the basis of an output of the analog-digital converter, a phase locked loop and a switch inserted between the analog-digital converter and the reception frequency converter to select either an input from the intermediate frequency generator or an input from the reception frequency converter.

Electromagnetic wave transceiver apparatus and nuclear magnetic resonance analyzing apparatus using it

A probe coil for an NMR apparatus including a superconductor coil formed from a superconductor made of magnesium 2-boride formed on the surface of a substrate, and a coil bobbin around which the superconductor coil is wound, wherein the substrate is made of a material that contains no hydrogen atoms.

An NMR/ESR antenna is inserted into a magnet device for generating a static magnetic field, and irradiates a sample with an electromagnetic wave to detect a signal generated from the sample. The NMR/ESR antenna comprises a sample tube, an NMR solenoid coil, an ESR microwave cavity, and a microwave guide. The solenoid coil has a central axis coaxial with a central axis of the ESR microwave cavity, and orthogonal to a direction of a main magnetic field generated by the magnetic device.

NMR.ESR antennas and spectrometers using these

In an NMR measurement method using an NMR apparatus which converts a received signal to digital data using an analog/digital converter and performs a spectral analysis, a folding and aliasing count is decided from a variation in a peak frequency and frequency discrimination is performed. More specifically, a Nyquist frequency is changed to cause a variation of the peak frequency. Since the Nyquist frequency is inversely proportional to an increment of an evolution time twhich is a feature of multi-dimensional NMR, the Nyquist frequency can be changed by changing the increment of the evolution time. Furthermore, the Nyquist frequency is changed in such a way that a ratio between different Nyquist frequencies is not a ratio between natural numbers nand nwhich are greater than 0 and smaller than or equal to the maximum folding and aliasing count.

NMR measurement method and apparatus utilizing nyquist frequency changes

The invention reduces a flow of a heat making an intrusion into an NMR probe, and uniformizes a spatial temperature generated in a sample pipe. A temperature modulated gas is supplied to a thermal anchor temperature modulated gas flow path constituted by a sample pipe insertion port around a sample pipe, and sample pipe insertion port structure bodies. A part of the temperature modulated gas is divided into a thermal anchor temperature modulated gas flow path by a temperature modulated gas division hole, and flows toward a thermal anchor. The thermal anchor is constituted by a porous member having a hole through which a gas can pass, and comes to the same temperature as the temperature modulated gas on the basis of a heat exchange with the temperature modulated gas. Further, since the thermal anchor is provided in a path of a heat flow making an intrusion into the sample pipe from an external portion, it is possible to absorb the heat intruding from the external portion by the temperature modulated gas passing through the thermal anchor, and it is possible to stably keep the temperature of the sample pipe.

NMR probe

An NMR apparatus which includes an NMR probe coil of a superconductor made of magnesium 2-boride formed on the surface of a substrate made of a flexible organic polymer material.

An NMR apparatus provided with a lock device having improved monotonicity without reducing a control range. In a lock device including a lock transmitter, a lock receiver, a lock detector, a lock corrector, a lock power supply and a lock coil, the lock detector performs complex detection of a detection signal and outputs to the lock corrector an absorption signal SA which is a real number component of the detection signal and a dispersion signal SD which is an imaginary number component of the detection signal; the lock corrector obtains a value SC by multiplying together SD/(SD+SA) and a value G, and the lock power supply performs adjustment so that a current flowing through the lock coil is proportional to SC. Different constants G are selectively used according to the value of SD/(SD+SA).

Stabilizer for stabilizing NMR magnetic field and method of the same

There is providesd a nuclear magnetic resonance spectrometer having a high sensitiveness by simultaneously realizing a high uniformity of a static magnetic field and a high measuring sensitiveness. A sample tube used in the nuclear magnetic resonance spectrometer is constructed in a structure in which the shape of a sample placed in a measuring space can be changed. The change in shape of the sample can be achieved by controlling the pressure applied to the sample. There is at least one surface of contact between the sample placed in the measuring space and a gas existing around the sample, and the shape of such surface is maintained by the surface tension of the sample. In this case, a central portion of a magnet, into which the sample tube is inserted, filled with a sterilizing gas having a pressure higher than the atmospheric pressure, and the sample having a surface of contact with the gas is maintained in a sterile state. A measuring coil used in the nuclear magnetic resonance spectrometer is disposed on a rotatable curved surface symmetrical with respect to a rotational axis provided by a longitudinal center axis of the sample tube.

Nuclear magnetic resonance spectrometer and method for operation thereof

An NMR apparatus has a circuit adapted to improve the degree freedom of design and generate an excitation radiofrequency wave pulse suited for a sample to be measured. The radiofrequency wave transmission circuit includes a local oscillator, an IQ modulator having two mixers and two arbitrary waveform generators connected to the IQ modulator. Fourier inverse transform is applied to data inputted to the arbitrary waveform generators.

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Hitachinaka, Japan

Minseok Park