摘要:
A challenge to be met by the present invention is to provide an electronic component mounting machine and an electronic component loading head in which the loading head has two rows of nozzle shafts and that can promote miniaturization of the machine by minimizing the loading head. In a loading head having two rows of nozzles (L1 and L2) including a plurality of nozzle shafts arranged in rows and at a predetermined nozzle arrangement pitch, a θ rotary drive mechanism that rotates the nozzle shafts around their axes is configured so as to include driven pulleys (28) coupled to the respective nozzle shafts; a plurality of idlers (30) interposed between the two rows of nozzles (L1 and L2); and endless drive belts (29A and 29B) that transmit rotation of the θ-axis motors (27A and 27B) to the driven pulleys (28). Drive surfaces (29a) of the respective driving belts (29A and 29B) are looped around the respective drive pulleys and the respective driven pulleys, and the other sides of the respective drive surfaces (29a) are looped while guided by the idlers (30).
摘要:
A system quickly accesses suitable represented information, in view of a lapse time from retrieval result display to user move. A system control section (SCS) of a retrieval system server accesses a retrieval database registering retrieval priorities to be associated with respective web pages. The SCS sends a retrieval result page on which the retrieval result is to be displayed, from the web page having the higher retrieval priority on a priority basis, receives, after sending the same, a re-retrieval request or a request for the other retrieval result page, indicating a sending request for the new retrieval result page, and measures lapse time “t”.
摘要:
Inter-carrier interference caused by frequency fluctuations, amplitude fluctuations, phase fluctuations, or the like is reduced without reducing a transmission efficiency. A receiving end has a canceling filter section that alleviates the inter-carrier interference caused by the frequency fluctuations, the amplitude fluctuations, the phase fluctuations, or the like through filtering processing. A transmitting end has a precoding section that facilitates determination of demodulation data in a vector demodulation section on the receiving end through precoding processing. Or, the receiving end has a trellis decoding section that decodes the demodulation data through trellis decoding processing.
摘要:
A transmitter modulates for each symbol period a plurality of carriers that include a carrier group that is consisted of a plurality of prescribed carriers, and repeatedly transmits control information in cycles by using the carrier group. The transmitter transmits multiple-bit binary data of the control information in each symbol period, thereby transmitting the control information once in each of the cycles that includes at least one symbol period. The transmitter controls the transmission unit to switch, within the carrier group, for each of the cycles, carriers of bits of the control information, according to a prescribed rule.
摘要:
A TFD (21) includes: a glass substrate (10); a polysilicon layer (12a) formed on the glass substrate (10), and including a p-type semiconductor region (12ap) and an n-type semiconductor region (12an) which are both formed in a same plane and doped with impurity ions; and an insulating film (13) provided to cover the polysilicon layer (12a). In at least one of the p-type semiconductor region (12ap) or the n-type semiconductor region (12an), the concentration of the impurity ions in a multilayer of the polysilicon layer (12a) and the insulating film (13) along the thickness of the multilayer reaches a peak concentration in the insulating film (13) or in a portion of the polysilicon layer (12a) located between the midpoint of the thickness of the polysilicon layer (12a) and the insulating film (13).
摘要:
A radio communication device that, even if it is interfered by a radio transmission station other than a radio transmission station with which it intends to communicate, estimates a signal transmitted from the intended radio transmission station by taking into account the influence of the interference, by obtaining an estimator of “s” that denotes a column vector representing a signal transmitted from the radio transmission station, in accordance with a following expression: s=RssHH(HRssHH+Ruu)−1r, where “Rss” denotes a covariance matrix of the column vector “s”, “r” denotes a column vector representing the signal received by the signal receiving unit, “H” denotes a matrix being the numerical sequence calculated by the first calculating unit, “Ruu” denotes a covariance matrix being the numerical sequence calculated by the second calculating unit, “H” denotes a complex conjugate transposition, and “−1” denotes an inverse matrix.
摘要:
SP signals to be transmitted from a first transmitting antenna 11 are arranged in the same pattern as SP signals to be transmitted from a second transmitting antenna 12. The SP signals to be transmitted from the second transmitting antenna 12 in one symbol are generated, such that the polarity of the SP signals are alternately inverted and non-inverted with respect to the SP signals to be transmitted from the first transmitting antenna 11 in the same symbol. Thus, in the direction that the symbol number is incremented by 1 and the carrier number is incremented by 3, the polarity of SP signals transmitted from the second transmitting antenna 12 are all inverted or non-inverted with respect to the polarity of corresponding SP signals transmitted from the first transmitting antenna 11.
摘要:
A thickening composition characterized in that the thickening composition comprises a xanthan gum in which a potassium salt is attached to a powder surface of the xanthan gum.
摘要:
An object is to generate a pilot signal for estimating transmission characteristic of a transmission channel which is suitable for the OFDM/OQAM multicarrier modulation. A phase reference pilot symbol of which a modulation amplitude is suppressed to zero, and an amplitude reference pilot signal obtained through modulation performed by using an amplitude known to a reception end are transmitted from a transmission end, and the transmission characteristic of the transmission channel is estimated and compensated by using the phase reference pilot signal and the amplitude reference pilot signal at the reception end. Thus, it is possible to simplify frame generation process performed at the transmission end, and reduce transmission power for the phase reference pilot signal.