Abstract: The present invention discloses a differential COTDR distributed acoustic sensing device based on heterogeneous double-sideband chirped-pulses of the invention, comprising a light source (1), a 1×2 polarization-maintaining optical-fiber coupler (2), a dual Mach-Zehnder electro-optical modulator (3), an arbitrary waveform generator (4), a first low noise microwave amplifier (5), a second low noise microwave amplifier (6), an electro-optical modulator bias control panel (7), a 1×2 optical-fiber coupler (8), an erbium-doped optical-fiber amplifier (9), an optical-fiber filter (10), an optical-fiber circulator (11), a sensing optical fiber (12), a tricyclic polarization controller (13), a 2×2 optical-fiber coupler (14), a balanced photoelectric detector (15), a data acquisition card (16) and a processing unit (17).

Abstract: An image forming apparatus includes a plurality of sheet storage receptacles configured to store a sheet. The image forming apparatus also includes a fixing device having a heating belt and a pressure roller configured to heat and fix toner on the sheet conveyed from one of the plurality of sheet storage receptacles. The image forming apparatus also includes a processor and a memory configured to store temperature information associated with each sheet storage receptacle and related to temperature control of the fixing device, acquire type information of a sheet to be printed, in response to a predetermined condition, specify the sheet storage receptacle storing the sheet to be printed, and perform a first heating control that controls a temperature of the fixing device based on the stored temperature information associated with the specified sheet storage receptacle.

Abstract: Methods and systems for logging a wellbore having a casing using ultrasonic logging are described. Traditional ultrasonic logging involves using a piezoelectric transducer that is spaced from the inner surface of the casing by a least a distance referred to as the “far-field” distance. Logging in the “far-field,” as traditionally done, avoids destructive interference. The methods and systems described herein allow logging in the “near-field.” Logging in the near-field using the described methods and systems overcomes several difficulties associated with acoustic logging, particularly in attenuative, dispersive, and deviated environments.

Abstract: Provided are a positioning method and apparatus for a display screen in an optical module. The positioning method for the display screen in the optical module comprises the following steps: arranging light paths of an optical lens and image receiving device of a product coaxially; providing the display screen, and activating the display screen, wherein the display screen displays an image, and a light path formed by a light ray from the image passes through the optical lens; the image receiving device receives the light path passing through the optical lens in real time to obtain a virtual image; calculating a slope deviation of the display screen; calculating a distance deviation from the display screen to the optical lens; calculating a plane position deviation of the display screen; and calibrating a relative position of the display screen according to a calculation result.

Abstract: An image forming apparatus includes a first seal, on which a first discrimination mark is displayed, provided at a position corresponding to a first mounting portion for mounting a first collecting container for collecting residual toner, and a second seal, on which a second discrimination mark is displayed, provided at a position corresponding to a second mounting portion for mounting a second collecting container for collecting residual toner. A notifying device notifies, in a case that one of the first collecting container and the second collecting container becomes full, information prompting exchange of the collecting container which becomes full and identifying the collecting container to be exchanged by indicating the first discrimination mark or the second discrimination mark.

Abstract: An electronic device is provided in this disclosure. The electronic device includes a body, a shaft sleeve, a function module, and a rotating resistance device. The shaft sleeve is fixed to the body. The function module includes a shaft portion rotatably disposed on the shaft sleeve. The rotating resistance device is disposed on the shaft sleeve or fixed to the body and is against the shaft portion of the flip function module to apply rotational resistance to the shaft portion of the function module, so that the function module stably stays at any position without being affected by an external force.

Abstract: Apparatus for monitoring the erosion of components of industrial plants comprising at least one optical fiber sensor (7?), the optical fibers (7?) not being provided with any Bragg grid, and an analysis unit, wherein the at least one optical fiber sensor (7?) is positioned inside a wall subjected to wear by erosion in such a way as to terminate immediately under the surface of the wall itself belonging to the components (10, 10?, 20, 20?) to be monitored, and the erosion depth is measured by using the light reflected from the eroded end of the optical fiber (7?) itself.

Abstract: A projection screen and a projection apparatus are provided. The projection screen includes a base, a rolling mechanism, a lifting mechanism, an optical curtain and a tensioning mechanism. The rolling mechanism is disposed on the base. A first end of the lifting mechanism is fixedly connected to the base. A first end of the optical curtain is fixedly connected to the rolling mechanism, and a second end of the optical curtain is fixedly connected to a second end of the lifting mechanism. A tensioning mechanism is fixedly connected to the rolling mechanism and the second end of the lifting mechanism. The lifting mechanism is located between the optical curtain and the tensioning mechanism. The projection apparatus includes the above projection screen and an optical engine.

Abstract: A fixing device includes a heater including a substrate and a resistance heating element, an endless belt, a holder, a first heat conductive member and a second heat conductive member arranged in a longitudinal direction of the heater such that a first end of the first heat conductive member and a second of the second heat conductive member in the longitudinal direction of the heater are adjacent to each other, a temperature sensor configured to detect a temperature at an end part of the heater. The temperature sensor is in contact with the first heat conductive member. A position located between first end of the first heat conductive member and the second end of the second heat conductive member is closer to the temperature sensor than a central position of the resistance heating element in the longitudinal direction of the heater.

Abstract: A device includes a resonant voltage measurement unit 10 configured to input a predetermined frequency signal to a circuit including a fixed capacitance formed between a ground and a lower electrode, a variable capacitance formed between an upper electrode that is disposed above the lower electrode and the ground or between the lower electrode and the upper electrode, and a resonance inductor to measure a resonant voltage that is dependent on a current flowing in the resonance inductor when the variable capacitance is changed to cause the circuit to resonate, a pre-correction voltage-to-ground measurement unit 20 configured to measure a pre-correction voltage-to-ground that is a voltage between a measurement electrode, which is disposed at an equal height to the lower electrode and forms a capacitance-to-ground between the measurement electrode and the ground, and a measurement probe connected to a conductor, and a voltage-to-ground correction unit 30 configured to use the fixed capacitance, the variable capa

Abstract: A cleaning device includes a blade-shaped cleaning member of which a tip formed by an elastic body is arranged to be pressed against an endless belt and that cleans a surface of the endless belt; and a driven roller that is arranged to face the cleaning member via the endless belt and is driven and rotated with movement of the endless belt and of which an outer peripheral surface is formed by an elastic body.

Abstract: A transfer device includes an intermediate transfer belt that has an outer peripheral surface to which a toner image is to be transferred, a primary transfer device that has a primary transfer member performing primary transfer of a toner image formed on a surface of an image holder to the outer peripheral surface of the intermediate transfer belt, and a secondary transfer device that has a secondary transfer belt arranged in contact with the outer peripheral surface of the intermediate transfer belt and performing secondary transfer of the toner image transferred to the outer peripheral surface of the intermediate transfer belt to a surface of a recording medium, in which the intermediate transfer belt has an indentation modulus A of 5,000 MPa or more, and the secondary transfer belt has an indentation modulus B of 300 MPa or less and a tensile modulus C of 250 MPa or more.

Abstract: An information processing apparatus (2000) acquires time-series data (14) output by a sensor (10) and computes a plurality of feature constants ?i and a contribution value ?i representing contribution with respect to the time-series data (14) for each feature constant ?i. Thereafter, the information processing apparatus (2000) outputs information in which a set ? of the feature constants ?i and a set ? of the contribution values ?i are associated with each other as a feature value of a target gas. As the feature constant ?, a velocity constant ? or a time constant ? that is a reciprocal of the velocity constant can be adopted.

Abstract: Systems, devices and methods including a handheld sensing device comprising: a sensor configured to measure ambient methane, ethane, propane, butane, and/or pentane concentrations; and a handle, where the sensor is disposed on a first end of the handle; control electronics comprising: a processor having addressable memory, the processor in communication with the sensor, where the processor is configured to: receive the measured ambient gas concentrations; and detect elevated ambient gas concentrations that may be attributed to a natural gas emissions source based on the measured ambient gas concentrations.

Abstract: An image forming apparatus includes a latent image bearer, an intermediate transferor, a primary transferor, a second transferor, and a cleaning blade. The latent image bearer has a surface onto which a lubricant comprising zinc stearate is supplied. The intermediate transferor has a surface onto which the toner image is transferred, the surface including an adhering region to which the lubricant from the latent image bearer adheres. The cleaning blade cleans the surface of the intermediate transferor including the adhering region, after the toner image is secondarily transferred. In a region outside at least a horizontal A4 sheet passing width on the intermediate transferor, a ratio of a peak area derived from zinc stearate to a peak area derived from the intermediate transferor in a difference spectrum between attenuated total reflection (ATR) infrared absorption spectrums of the intermediate transferor in an unused state and after use is 0.892 or less.

Abstract: Provided is a monitoring system for a milling facility, which includes a plurality of grinders including roll mills for grinding a material to be milled and sifting machines for sifting, according to grain size, the material to be milled as ground by the roll mills; and a plurality of pulverizers including roll mills for pulverizing the material to be milled and sifting machines for sifting, according to grain size, the material to be milled as pulverized by the roll mills. The material to be milled is milled by each of the grinders and pulverizers. A plurality of flow rate measuring devices are provided on respective flow paths for product flours discharged from the respective sifting machines in the respective grinders and pulverizers, and a monitoring device capable of monitoring presence or absence of an abnormality based on measurement results on respective flow rates of the product flours is provided.

Abstract: A support for an imaging device includes a first rotatable assembly supportable by a support that rotates in a generally horizontal plane and a horizontal locking member. The imaging device includes a second rotatable assembly that rotates in a generally vertical plane. imaging device includes an interconnection structure that interconnects the first rotatable assembly to the second rotatable assembly such that the second rotatable assembly is rotatable around the first rotatable assembly at an elevation higher than the first rotatable assembly and offset laterally from the first rotatable assembly. imaging device includes the first rotatable assembly including a panning structure that rotates the support in the generally horizontal plane and a leveling base that is rotatable in a non-coplanar manner relative to the panning structure.

Abstract: A method capable of accurately evaluating a reflected wave by properly evaluating an attenuation rate of an elastic wave without being influenced by a transmission loss in each of transmission and reception. In an evaluation method of a reflected wave for evaluating, in a long object, the presence or absence and the size of a defect of the long object by transmitting an elastic wave propagating in a longitudinal direction of the long object and receiving a reflected wave of the elastic wave, the size of the defect is evaluated by determining an attenuation rate ?1 of the elastic wave based on an environment in which the long object is installed from a transmission wave amplitude At of the elastic wave and a first reflected wave amplitude Ar from a specific portion of the long object serving as a reference, creating a distance-amplitude characteristic curve of the reflected wave by using the attenuation rate ?1, and comparing the distance-amplitude characteristic curve with the reflected wave amplitude.

Abstract: A fixing unit includes a tubular film, a pressure roller, a heater including a first heating element and a second heating element, a detector configured to detect a temperature of the heater, a switcher configured to switch which of the first heating element and the second heating element is supplied power from a power supply, and a controller configured to control the switcher. The controller is configured to execute a first control of determining a first electric energy and a second electric energy based on the temperature of the heater detected by the detector and a target temperature of the heater, and a second control of causing the switcher to switch between a state in which power is supplied to the first heating element by the first electric energy and a state in which power is supplied to the second heating element by the second electric energy.

Abstract: In an image heating apparatus, a plurality of heat-generating members that a heater has include a first heat-generating member group and a second heat-generating member group, symmetrically laid out with a conveyance reference position of a recording material. A control portion supplies electric power via first and second common circuits to the first heat-generating member group and the second heat-generating member group. A temperature-detecting portion includes a first temperature-detecting element for detecting a temperature of one of the heat-generating members included in the first heat-generating member group, and a second temperature-detecting element for detecting the temperature of one of the heat-generating members included in the second heat-generating member group.