Abstract: A body coil for an MRI system has a conductor management and a tuning/detuning circuit. The tuning/detuning circuit is connected to the conductor management, and used to subject the conductor management to tuning/detuning control by a control signal. The tuning/detuning circuit has a control signal interface, a switch diode unit and an AC/DC conversion circuit. The control signal interface receives the control signal. There is at least one switch diode unit, respectively series-connected on at least one antenna rod and/or at least one end ring of the body coil conductor management. The AC/DC conversion circuit has a rectifying circuit, for converting the power of an input RF emission signal in the MRI system to a DC current, the DC current being used to provide a DC current for the switch diode unit to be turned on. The body coil reduces the cost of a DC power supply, and this reduces heat generated by the diodes.

Abstract: A premixed underground ventilated henhouse includes a gable, a sidewall, a roof and a floor. An inner chamber is further provided in the middle of the henhouse. A partition is hermetically provided between the sidewall and an inner wall. An air inlet plate is provided between the two inner walls. A plurality of fans and a plurality of air inlet windows are uniformly provided on an inner roof. A plurality of wet curtains and an air vent are provided on the sidewall. Air outlet slots are uniformly provided on the inner wall. An underground exhaust bunker is provided under the floor. A vent pipe and a fan are provided on one side of the underground exhaust bunker. An air outlet is provided at an upper end of the vent pipe.

Abstract: A henhouse includes a gable, a sidewall, and a roof. An inner chamber parallel to the sidewall is provided in the middle of the henhouse. The inner chamber includes an inner wall parallel to the sidewall and an inner roof. A partition is provided between the sidewall and the inner wall. An air inlet plate is provided between the two inner walls located below the inner roof. A pressure chamber is formed between the inner roof and the air inlet plate. A premixing chamber is formed between the inner roof and the roof. A plurality of fans and air inlet windows are uniformly provided on the inner roof. A plurality of air inlet holes and small inlet windows are uniformly provided on the air inlet plate. A plurality of wet curtains and an air vent are provided on the sidewall. A plurality of air outlet slots are uniformly provided on the inner wall.

Abstract: The present invention relates to a crystal form of a substituted aminopyran compound, and a pharmaceutical composition, a preparation method and a use thereof in the preparation of a drug for treating type II diabetes. In particular, the present invention relates to a crystal form IV of a compound as shown by formula (I) and a pharmaceutical composition, a preparation method and a use thereof in the preparation of a drug for treating type II diabetes.

Abstract: The present invention relates to a visual efficacy measuring method for objects in different light environments, which comprises: (a) setting a light environment; (b) measuring a relationship between color temperature and time; (c) a driver visually recognizing a target object; (d) resetting the light environment, and repeating the step (c); (e) processing the visual recognition information data collected by the experiments so as to establish a relationship of the visual recognition time in relation with the light environmental parameters of color temperature, color rendering index and brightness; (0 performing visual efficacy analysis according to the processing results of the visual recognition information data.

Abstract: The present invention relates to a crystal form of a substituted aminopyran compound, and a pharmaceutical composition, a preparation method and a use thereof in the preparation of a drug for treating type II diabetes. In particular, the present invention relates to a crystal form IV of a compound as shown by formula (I) and a pharmaceutical composition, a preparation method and a use thereof in the preparation of a drug for treating type II diabetes.

Abstract: An RF choke resonator assembly has a cylindrical magnetic field shielding case with openings at two ends thereof, a magnetic field shielding plate and a winding skeleton, and a capacitive plate inside the case. The magnetic field shielding plate closes the opening at one end of the case, and has a through-hole allowing a cable to pass there through. The cable is wound on the winding skeleton. The capacitive plate is disposed opposite the magnetic field shielding plate in the case, separated therefrom by the winding skeleton, and is electrically connected to the case in a closed manner. The capacitive plate has a through-hole allowing the cable to pass there through. The capacitive plate is remote from the other opening case end opposite the opening closed by the magnetic field shielding plate. An insulation space is formed at that other opening, having a length in the axial direction greater than or equal to one quarter of the length of the magnetic field shielding case in the axial direction.

Abstract: A local coil assembly for an MRI apparatus includes an RF channel setting unit, a basic coil having a first slot, and a first additional coil connected to the first slot. Each of the basic coil and the first additional coil includes one or more receiving channels. The RF channel setting unit is configured for setting a receiving channel of the basic coil and a receiving channel of the first additional coil. The basic coil is configured for receiving an RF signal according to a receiving channel set by the RF channel setting unit. The first additional coil is configured for receiving an RF signal according to a receiving channel set by the RF receiving channel setting unit. The present teachings are compatible with multiple coils, and support the combined use of multiple coils.

Abstract: A tuning/detuning structure and a detuning method for an RF coil use an RF power source, a first impedance circuit, a first RF line, and a first port having a first guide leg end and a first input end, with the first guide leg end being connected to a first end ring capacitance of the RF coil. When the RF coil needs to be detuned, the first input end is connected to the first impedance circuit via the first RF line. When the RF coil needs to transmit an RF pulse signal, the first input end is connected to the RF power source via the first RF line. The need for a switch element is thereby reduced as is harm resulting from breakdown of such a switch element. An impedance circuit can be combined with a switch element to realize detuning jointly, and a good detuning effect can be achieved by a small number of switch elements.

Abstract: The present disclosure relates to an amino pyran ring derivative and a composition and use thereof, and in particular, to an amino pyran ring derivative represented by general formula (I) or a stereoisomer, a pharmaceutically acceptable salt or a prodrug thereof, a pharmaceutical composition comprising the derivative, and their medical use in the manufacture of a di-peptidyl peptidase IV (DPP-IV) inhibitor, in formula (I) the substituents are defined the same as those in the specification.

Abstract: An end ring port structure of an atypical coil for a magnetic resonance imaging system, has an end ring, provided with multiple end ring capacitance positions for disposing equivalent capacitances, with a portion of the equivalent capacitances being formed by two or more split capacitors. A first port has a first leg and a second leg, which are each connected to the end ring. A second port has a third leg and a fourth leg, which are each connected to the end ring. A first capacitor bank is arranged on the end ring between an end ring connection point of the first leg and an end ring connection point of the second leg. The first capacitor bank has at least two capacitors not all belonging to the same end ring capacitance position. A second capacitor bank is arranged on the end ring between an end ring connection point of the third leg and an end ring connection point of the fourth leg. The second capacitor bank has at least two capacitors not all belonging to the same end ring capacitance position.

Abstract: A local coil for an MRI system includes a signal antenna to receive a magnetic resonance signal and a tuning/detuning circuit to subject the signal antenna part to switch control according to a control signal. The tuning/detuning circuit is connected to the signal antenna part. The tuning/detuning circuit includes a control signal interface, a resonant circuit and an AC/DC conversion circuit. The control signal interface receives the control signal. The resonant circuit includes a diode. The AC/DC conversion circuit converts an alternating current generated by an electromagnetic wave to a direct current. The AC/DC conversion circuit is connected in series with the diode. A small detuning control current may be used, and detuning control circuitry may be reduced.

Abstract: A local coil and a magnetic resonance imaging system are provided. The local coil includes an antenna part, an adjustment part and a transmission part. The antenna part includes a first capacitor connected in series for adjusting a frequency of the antenna part. The adjustment part includes a tuning/detuning diode and is connected in parallel to the first capacitor, and the tuning/detuning diode is used for adjusting tuning and detuning of the antenna part. The transmission part includes a radio-frequency transmission line that connects the antenna part and the adjustment part, and the transmission part provides a phase difference of an odd multiple of 180° between the antenna part and the tuning/detuning diode.

Abstract: Described herein are methods and devices for biologically treating water and/or wastewater. The methods and devices for treating wastewater may be enhanced using an surge lifting device which moves water and/or solids using volumes of air (for liquid transfer and mixing) and the automatic sludge return mechanism, combined with alternating aeration on and off operation to achieve comprehensive nitrogen and phosphorus removal. This surge lifting device can provide occasional surges of water using large bubbles which are able to move great volume of liquid while minimizing dissolved oxygen transfer to the surrounding liquid. Use of the devices and processes herein provides a simple, eloquent approach to wastewater treatment with less operation and maintenance costs than conventional devices and/or processes. The same surge lifting device can also be installed in an anaerobic digester, and use the biogas generated below the device to automatically mix the digester, without external energy input.

Abstract: A transmit antenna selector includes a control circuit, a body coil signal output interface, a local coil signal output interface, a radio-frequency signal input interface, and a dummy load. The control circuit includes a plurality of diodes. The control circuit electrically connects, according to a control signal and via the plurality of diodes, the radio-frequency signal input interface with the body coil signal output interface, with the local coil signal output interface, or with the dummy load.

Abstract: A magnetic resonance (MR) signal receiving apparatus has multiple local coils, capable of separately receiving MR signals generated by a body in an MR examination, each of the local coils having multiple antenna units and a time division multiplexing module. The time division multiplexing module enables MR signals received by the antenna units separately to be provided as an output by just one output line. The apparatus also has a reception coil channel selector having multiple input interfaces connected to the respective output lines of the multiple local coils, and a combiner in the reception coil channel selector that combines in time or power, all or a portion of the MR signals of the local coils, to form one or more MR composite signals.

Abstract: A magnetic resonance signal receiving apparatus has a local coil, and an RF receiver connected thereto the local coil via a plug. The local coil has multiple antenna units, each separately receiving magnetic resonance signals generated by a subject in a magnetic resonance examination. The local coil also has a respective bandpass filter for each antenna unit. The local coil also has a time division multiplexer having multiple input ports respectively connected to the bandpass filters. Bandpass-filtered magnetic resonance signals that have passed through the bandpass filters are thus emitted as an output by just one output line according to multiplexing timeslot. The RF receiver has one or more RF receiving channels for receiving and processing the magnetic resonance signal from the output line of the local coil. The RF receiver is disposed close to the plug.

Abstract: A coil control device of a magnetic resonance imaging system includes a DC-DC switching converter and a controller. The DC-DC switching converter is configured for switching and converting a DC power supply to a DC current or a DC voltage. An input end of the DC-DC switching converter is connected in parallel to the DC power supply. The controller is configured to control the DC-DC switching converter to switch and provide the DC current or the DC voltage. In some embodiments of the coil control device described herein, two power supplies (e.g., +15 V and ?32 V) may be reduced to one power supply (e.g., +15 V), thereby saving energy and foregoing a water-cooling system.

Abstract: A method and an apparatus for a magnetic resonance imaging system are provided. A type of further processing of signals transmitted by a local coil to a magnetic resonance imaging (MRI) system is determined in dependence on information received in or from the local coil about a local-coil type of the local coil.

Abstract: A debugging device for a body coil of a magnetic resonance imaging (MRI) system includes a pair of output ports connected to a pair of input ports of the body coil. The debugging device also includes a pair of input ports connected to a pair of output ports of the MRI system. The debugging device includes a pair of extension circuits, separately connected between the pair of input ports and the pair of output ports; and a first adjustment capacitor for reducing or eliminating coupling between the pair of input ports. The first adjustment capacitor is bridged between the pair of input ports, and the capacitance of the first adjustment capacitor is variable.