摘要:
To provide a method for treating ballast water with a membrane, which can reliably remove a fouling substance derived from a gel-like substance and a fouling substance of mineral origin, the fouling substances attached to a membrane, by separating or breaking down the fouling substances, and can maintain the membrane flux for long periods.In a method for treating ballast water with a membrane, the method provided with, in or on a hull of a ship, the membrane treatment equipment 1 that separates a microorganism with a size equal to or greater than a predetermined size, a fouling substance attached to the surface of the membrane is dissolved, broken down, or removed by using a cleaning fluid containing a peroxide which is at least one selected from hydrogen peroxide, hypochlorous acid, and ozone water.
摘要:
A method for treating ship ballast water with a membrane, which can easily separate and reliably remove a fouling substance attached to a membrane and maintain the membrane flux for long periods.the method including a membrane separation step of taking in seawater in a port area in which a ship is anchored and separating a microorganism with a size equal to or greater than a predetermined size therefrom with a membrane filtration apparatus installed in or on a hull of the ship and having a filtration membrane module, a backwash step of separating a fouling substance attached to a membrane surface of the membrane filtration apparatus from the membrane surface by backwashing is provided.
摘要:
A surveying system, which comprises a surveying instrument 1 which measures a distance and an angle by projecting a distance measuring light toward a target 12 and can measure a three-dimensional position data of said target and has a function to track the target, and a movable side control device 12 provided on the target side, wherein said surveying instrument has a communication means 15 capable to transmit the three-dimensional position data of the target measured by the surveying instrument to said movable side control device and a first control arithmetic unit 29 for controlling the search of the target by the surveying instrument, wherein said movable side control device has a displacement amount detecting means 38 of the target and a second control arithmetic unit 35 for calculating the displacement amount of the target based on a target detection signal from the displacement amount detecting means and for calculating a target position based on the displacement amount of the target and based on the three-dimensional position data, and in case the surveying instrument cannot track the target, the target position transmitted from the movable side control device is acquired, and the first control arithmetic unit starts searching of the target with the target position as a starting point.
摘要:
An edge switch that switches a frame between a user network and a wide area network includes an access port to connect a communication module including a storage unit storing a first identification number identifying which access port the communication module is connected to; an identification number storage unit storing a second identification number assigned to the access port; a control circuit capable of detecting a connection of the communication module; a reading unit to read the first identification number upon detection of the connection; a switchover determination unit to read the second identification number of the access port to which the connection has been detected, to compare the second and first identification numbers, and to determine that a switchover has occurred if they do not match; and a writing unit to write to the storage unit the second identification number when the switchover is determined to have occurred.
摘要:
The absolute angle calculation apparatus includes a calculation circuit calculating an absolute angular position based on a spatially modulated component in a photoelectrically-converted signal string. The calculation circuit includes a photoelectrically-converted signal string storage storing previous and current photoelectrically-converted signal strings obtained, for interpolating the absolute angular position, within a set time shorter than an absolute angle calculation time required to calculate the absolute angular position; a correlation detection circuit detecting a correlation between the previous and current photoelectrically-converted signal strings in the photoelectrically-converted signal string storage and detecting a shift amount therebetween; and an interpolation calculation circuit interpolating an inter-pattern absolute angular position equivalent value based on the shift amount obtained by the current measurement. The calculation circuit calculates an interpolated angle based on the shift amount and the absolute angular position equivalent value, adds the calculated interpolated angle obtained at the current measurement to the absolute angular position obtained at the previous measurement to calculate a current absolute angular position.
摘要:
An OCT probe has a sheath to be inserted into a subject; and an optical system within the sheath, for changing the direction of light which propagates from a light source through an optical fiber to irradiate the light onto the subject through a transparent portion of the sheath, and for reflecting the light beam, which is reflected by the subject, to guide the light into the optical fiber. A light output surface, for causing the light to be output from the reflecting surface in a direction obliquely inclined with respect to the inner surface of the sheath, and a reflected light sheath entrance preventing portion, for preventing light reflected by the inner surface of the sheath from entering the optical fiber, are provided in the optical system. The reflected light sheath entrance preventing portion may be formed by providing a cut planar surface portion on the lens.
摘要:
[Problem] To provide a membrane treatment method and a membrane treatment apparatus using a membrane module, which are capable of reducing fouling using a simple installation, without increasing costs.[Means for Solving the Problem] The membrane treatment method and membrane treatment apparatus using a membrane module according to the invention, having a membrane treatment tank 2 and a membrane module 1 centrally provided in the tank 2 for continuously performing filtration while raw water is being passed thereto; wherein raw water is introduced from the outside of the membrane treatment tank 2 toward the inside thereof along a direction tangent to a perimeter of the tank, to create a swirling flow in the tank 2.
摘要:
A to-be-repaired damaged part, which occurs in a rotor, is removed and shaped by machining or grinding. The shaped surface, from which the to-be-repaired damaged part is removed in the step, is roughened by a blasting process. A coating is formed on the surface, which is roughened in the step, by a high-velocity flame spray apparatus. The coating, which is formed in the step, is finished by machining or polishing. A defect inspection is performed to check presence/absence of a defect. A dimensional/quality inspection is performed for the part repaired in the step.
摘要:
An optical pickup device is provided which includes a first diffraction grating (45) that splits a light beam emitted from a light-emitting/-detecting element (31) into a zero-order light beam and positive and negative first-order light beams, a second diffraction grating (46) that diffracts return light from an optical disk (2) for traveling along a light path separate from that of the outgoing light, and a third diffraction grating (47) that corrects the deviation of the light path by diffracting the positive first-order light beam diffracted by the second diffraction grating (46). The light-emitting/-detecting element (31) provides a focusing error signal FE by detecting the negative first-order light beam, and a tracking error signal by detecting return portions of the positive and negative first-order light beams from the first diffraction grating (45).