Abstract: A component mounting system includes a component mounting device including a component mounting unit configured to mount a component on a substrate, and a controller, and a server configured to be communicable with the controller. The controller is configured or programmed to acquire a plurality of types of operating state changes that are likely to cause a quality defect, and to transmit, to the server, information according to the types of the operating state changes. The server is configured to provide information indicating an inspection type for the substrate based on the information according to the types of the operating state changes.

Abstract: To n antenna elements of the base station, n wavelengths set at predetermined intervals in a range in which chromatic dispersion in an optical fiber between accommodation and base stations can be regarded as constant are assigned. The accommodation station adjusts the phases of optical signals of the wavelengths or modulated signals that modulate the optical signals such that the amounts of phase shift of their RF signals are at predetermined intervals. The accommodation station transmits beacon signals multiple times while varying a transmission phase shift interval ?1 and the terminal transmits beacon number information of a beacon signal selected based on received power multiple times. The accommodation station varies a reception phase shift interval ?2 for each piece of beacon number information to determine a reception phase shift interval ?2 which maximizes the received power and determines the transmission phase shift interval ?1 based on the beacon number information received from the terminal.

Abstract: A wireless transmitter/receiver generates a first signal which notifies timing of a time slot allocated to each wireless station device, a conversion unit converts the first signal into an optical signal, and each of a plurality of antenna units converts the first signal from the optical signal into an electrical signal and transmits the electrical signal wirelessly. The wireless station device transmits a second signal at the timing reported by the first signal. Each of the plurality of antenna units converts the second signal wirelessly received from each wireless station device into an optical signal, and the conversion unit converts the second signal from the optical signal into an electrical signal.

Abstract: A component mounting device includes a nozzle shaft. The nozzle shaft includes a filter and a filter state checking portion. The filter state checking portion is configured to allow light to pass therethrough from a first side to a second side of the nozzle shaft in an axially orthogonal direction according to an inserted state of the filter.

Abstract: A derivation method includes: a transmission step of transmitting, to a wireless terminal, a first radio-wave signal according to an optical signal with a first wavelength and a second radio-wave signal according to an optical signal with a second wavelength; a communication start time information acquisition step of acquiring information on a first communication start time and information on a second communication start time; a reception time information acquisition step of acquiring information on a first reception time and information on a second reception time; a transmission time period derivation step of deriving a first round trip time and deriving a second round trip time; and an optical fiber length derivation step of deriving an optical fiber length, based on the first round trip time, the second round trip time, a group velocity or a group delay time of the optical signal with the first wavelength, and a group velocity or a group delay time of the optical signal with the second wavelength.

Abstract: There is provided an allocation method for allocating individual downlink data signals to positions on a time axis when a base station transmits the individual downlink data signals to a plurality of terminal stations.

Abstract: An AP 3 and STAs 5 acquire time information from an external device, and synchronize time. The AP 3 sets, in a first signal, a transmission start time of the first signal, and transmits the first signal to the STA 5. The STAs 5 transmit, to the AP 3, a second signal in which a delay time is set, the delay time being calculated from a difference between the transmission start time acquired from the first signal and a reception start time of the first signal at the own station. The AP 3 acquires delay time from the second signal of each STA 5, decides a timing for permitting transmission by each of the STAs 5 by time division, on the basis of the acquired delay time, and notifies the STAs 5 thereof. The STAs 5 each effect control to start transmission of signals to the AP 3 at the timing notified from the AP 3.

Abstract: To n antenna elements of the base station, n wavelengths set at predetermined intervals in a range in which chromatic dispersion in an optical fiber between accommodation and base stations can be regarded as constant are assigned. The accommodation station adjusts the phases of optical signals of the wavelengths or modulated signals that modulate the optical signals such that the amounts of phase shift of their RF signals are at predetermined intervals. The accommodation station transmits beacon signals multiple times while varying a transmission phase shift interval ?1 and the terminal transmits beacon number information of a beacon signal selected based on received power multiple times. The accommodation station varies a reception phase shift interval ?2 for each piece of beacon number information to determine a reception phase shift interval ?2 which maximizes the received power and determines the transmission phase shift interval ?1 based on the beacon number information received from the terminal.

Abstract: A master station device is connected to a slave station device that emits a transmission signal received by light via an optical transmission path from a plurality of antenna elements.

Abstract: A derivation method is a derivation method performed by a communication system, including: a transmission step of transmitting a first radio-wave signal according to an optical signal with a first wavelength and a second radio-wave signal according to an optical signal with a second wavelength; a communication start time information acquisition step of acquiring information on a first communication start time and information on a second communication start time; a reception time information acquisition step of acquiring information on a first reception time that is a reception time related to the first radio-wave signal, and information on a second reception time that is a reception time related to the second radio-wave signal; and an optical fiber length derivation step of deriving a length of the optical fiber, based on the first communication start time, the first reception time, the second communication start time, the second reception time, a group velocity or a group delay time of the optical signal wit

Abstract: The interference power estimation apparatus 1 calculates an inter-station vector from an interfering station over a sphere to an interfered station installed in the sphere based on a position of each station. In a case where a line segment connecting the position of the interfered station and the position of the interfering station does not intersect with the sphere, an angle between an antenna direction vector representing a direction of an antenna from the position of the interfered station and the inter-station vector is derived, and a sum of an antenna directivity attenuation amount obtained based on the angle and propagation losses calculated based on a distance between the interfered station and the interfering station is calculated.

Abstract: According to one embodiment, the image processing device includes imagers disposed on an outer circumference of a mobile object for imaging surroundings of the mobile object to generate multiple images including mutually overlapping regions, and a processor that corrects the images on the basis of one color-value mean value and another color-value mean value to generate a peripheral image by combining the corrected images. The one color-value mean value is an average of color values of a target region set in an overlapping region of one of the images. Another color-value mean value is an average of color values of a target region set in an overlapping region of another one of the images.

Abstract: A projection unit (12) of an interference power estimation device (1) projects an orbit of a satellite onto a map representing a ground surface. A range acquisition unit (13) determines a plurality of ranges on the map so that the projected orbit is included in the ranges. An altitude calculation unit (14) calculates an altitude of the orbit of the satellite in each of the ranges. A range interference calculation unit (16) calculates, for each of the ranges, an interference power between the satellite at a position determined by a latitude and a longitude of the range and the altitude calculated for the range and a radio station installed on the ground surface. An estimation result calculation unit (17) selects, as an estimation result, a maximum value among the interference powers calculated for each of the ranges.

Abstract: A wireless transmitter/receiver generates a first signal which notifies timing of a time slot allocated to each wireless station device, a conversion unit converts the first signal into an optical signal, and each of a plurality of antenna units converts the first signal from the optical signal into an electrical signal and transmits the electrical signal wirelessly. The wireless station device transmits a second signal at the timing reported by the first signal. Each of the plurality of antenna units converts the second signal wirelessly received from each wireless station device into an optical signal, and the conversion unit converts the second signal from the optical signal into an electrical signal.

Abstract: A component mounting device mounts an electronic component on a printed circuit board, and includes a sideview camera which takes an image of a side surface of a target, a mounting head having a nozzle shaft, and a driving device which moves the mounting head to a planar direction on a base. The nozzle shaft includes a shaft main body movably supported to a vertical direction with respect to the mounting head, and a suction nozzle attached at a tip of the shaft main body to suction and hold the electronic component, and an identification mark which identifies the suction nozzle is provided on a side surface of the suction nozzle.

Abstract: A readily tearable co-extruded multilayer barrier film being a multilayer film formed from at least three layers, the readily tearable co-extruded multilayer barrier film comprising a layered body having a barrier layer (I) containing a polar resin (a) as a main component, and an adhesive layer (II) and an adhesive layer (III) laminated on both sides adjacent to the barrier layer (I), the adhesive layer (II) and the adhesive layer (III) each at least containing a modified polyolefin-based resin (b) modified with an unsaturated carboxylic acid or a derivative thereof, and a cyclic olefin-based resin (c).

Abstract: To provide an interference evaluation apparatus including a station information storage unit configured to store interfering station information indicating station information related to an interfering station causing radio interference in radio communication and interfered station information indicating station information related to an interfered station receiving the interference, and a determination unit configured to perform an interference calculation for calculating an interference power, based on the interfering station information and the interfered station information stored in the station information storage unit, and determine whether the interfering station and the interfered station are usable together, based on the calculated interference power and an acceptable interference power in the interfered station.

Abstract: A first wireless communication apparatus assigns a pilot signal without an effective signal component at least in an adjacent frequency component to a generated transmit signal, and transmits the transmit signal including the pilot signal. A second wireless communication apparatus converts the received signal or a frequency-converted signal obtained by frequency conversion of the signal into a signal in a frequency domain, sets an approximate value of the distance between the second wireless communication apparatus and the first wireless communication apparatus, calculates a coefficient ?k, based on the approximate value of the distance, the effective bandwidth, the speed of light, the number of FFT points, and the frequency component number, extracts a signal in the frequency domain, generates a phase noise compensated sampling signal, and reproduces data transmitted by the first wireless communication apparatus.

Abstract: A component mounting system includes a component mounting device including a component mounting unit configured to mount a component on a substrate, and a controller, and a server configured to be communicable with the controller. The controller is configured or programmed to acquire a plurality of types of operating state changes that are likely to cause a quality defect, and to transmit, to the server, information according to the types of the operating state changes. The server is configured to provide information indicating an inspection type for the substrate based on the information according to the types of the operating state changes.

Abstract: The interference power estimation apparatus 1 calculates an inter-station vector from an interfering station over a sphere to an interfered station installed in the sphere based on a position of each station. In a case where a line segment connecting the position of the interfered station and the position of the interfering station does not intersect with the sphere, an angle between an antenna direction vector representing a direction of an antenna from the position of the interfered station and the inter-station vector is derived, and a sum of an antenna directivity attenuation amount obtained based on the angle and propagation losses calculated based on a distance between the interfered station and the interfering station is calculated.