摘要:
A method for contrast agent enhanced magnetic resonance imaging (MRI) of a target sample, comprising generating a magnetic field shift in a polarizing magnetic field during a relaxation portion of an MRI pulse sequence and thereafter acquiring an MR image.
摘要:
A loudspeaker apparatus has at least one sound generator wherein an at least partially sound-conducting channel is arranged in a sound radiation direction of the sound generator and is suitable for directing sound emerging from the sound generator along the course of the sound-conducting channel such that the sound emerges from the loudspeaker apparatus at a second end of the sound-conducting channel, which end is in the form of a sound outlet opening, at a radiation angle which defined by the sound outlet opening.
摘要:
A dust detecting circuit includes a sampling circuit and an alarm circuit. The sampling circuit has a first voltage amplifying circuit, a voltage comparing circuit, and a second voltage amplifying circuit. An input of the first voltage amplifying circuit is connected to an output of a dust sensor; two inputs of the voltage comparing circuit are respectively connected to a power supply for receiving a reference voltage and an output of the first voltage amplifying circuit. An output of the voltage comparing circuit is connected to an input of the second voltage amplifying circuit. An alarm circuit is connected to an output of the second voltage amplifying circuit. When the amount of the dust is more than a pre-determined threshold, a high level voltage signal is output from the sampling circuit to the alarm circuit, and the alarm circuit activates an alarm.
摘要:
A sound production controller can include a horn device that performs a vibrating operation at a predetermined resonance frequency in response to a predetermined operation to produce a warning sound, an input section which receives a sound production command signal outputted in response to execution of a function that requires sound production in the vehicle other than the predetermined operation, and a sound production controller which, if the input section receives the sound production command, provides a high-frequency signal having a frequency higher than the predetermined resonance frequency to the horn device to cause the horn device to produce a sound.
摘要:
In an electric horn for an automobile, a diaphragm is bent at its periphery to define an effective vibration area and a flange portion of a housing is also bent to hold the peripheral edge of the diaphragm. As a result, good sound and sealing are ensured in a compact structure with less number of parts.
摘要:
An exemplary embodiment of the present disclosure may provide a sound generator which is connected to a vehicle body and generates sound, the sound generator including: a magnetic circuit generating vibration; a yoke contacting an upper surface of the magnetic circuit; an elastic member contacting at least a part of an upper surface of the yoke and performing vibration motion; a housing including an internal space formed as upper and lower sides of the housing are opened and lateral sides of the housing are closed; and a coil receiving an alternating current signal provided from the outside, wherein the coil is positioned in the internal space of the housing, wherein the sound generator transmits the vibration generated by the magnetic circuit to the vehicle body and vibrate at least a part of the vehicle body such that sound is generated from the vehicle body.
摘要:
The present disclosure provides a hose for transporting used fracturing liquid and manufacturing method thereof. The hose may include an outer layer, an enhancement layer and an inner layer. The outer layer may include a first polymer. The enhancement layer may include a synthetic fiber. The inner layer may include a second polymer. The surface of the outer layer may include an alerting object. The alerting object may include at least one of a luminous layer, a light band, a reflective layer, an identification layer or a sound generating object. The luminous layer may include at least one of a strip-shaped luminous layer, a ring-shaped luminous layer or a spiral-shaped luminous layer, arranged on the outer surface of the outer layer.