摘要:
In a WDM transmission system employing a plurality of short wavelength bands having great attenuation due to optical fiber transmission, an optical repeater is constructed of a first multiplexing section and a second multiplexing section. The first multiplexing section is used for wavelength-multiplexing both the excitation light from a first Raman excitation light source, which distributively amplifies an S+ band included in light propagating through an optical fiber, and the light propagating through the optical fiber. The second multiplexing section is used for wavelength-multiplexing both the excitation light from a second Raman excitation light source, which distributively amplifies an S+ band included in light propagating through an optical fiber, and the light propagating through the optical fiber. The first and second multiplexing sections are provided between the optical fibers disposed between end offices. Thus an equal and satisfactory optical SN ratio even at any band are obtained.
摘要:
In a WDM transmission system employing a plurality of short wavelength bands having great attenuation due to optical fiber transmission, an optical repeater is constructed of a first multiplexing section and a second multiplexing section. The first multiplexing section is used for wavelength-multiplexing both the excitation light from a first Raman excitation light source, which distributively amplifies an S+ band included in light propagating through an optical fiber, and the light propagating through the optical fiber. The second multiplexing section is used for wavelength-multiplexing both the excitation light from a second Raman excitation light source, which distributively amplifies an S+ band included in light propagating through an optical fiber, and the light propagating through the optical fiber. The first and second multiplexing sections are provided between the optical fibers disposed between end offices. Thus an equal and satisfactory optical SN ratio even at any band are obtained.
摘要:
In the process of forming-the shoulder in which the diameter of a crystal is gradually extended from a small seed crystal to a predetermined value, the largest width of a bright ring, which is formed in a boundary between the melt and the crystal pulled up from the melt, is measured, and an arc width of an arbitrary portion of the bright ring located before the largest width portion is measured. When the largest width of the bright ring has reached a predetermined value, a measured value of the arc width at the arbitrary position of the bright ring is used as a reference value, and after that, automatic control is conducted so that the measured value of the arc width can be close to the reference value.
摘要:
Plantlets of trees of genus Gmelina can be efficiently regenerated on a large scale by culturing shoot apexes of trees of genus Gmelina on a B5 medium or its modified medium, each containing benzylaminopurine (BAP) or indole-3-butyric acid (IBA) together with BAP as plant growth regulators, thereby inducing and proliferating multiple shoots each having a large number of either definite buds or adventitious buds or both, then producing a large number of shoots from the resulting multiple shoots, transplanting the shoots to a B5 medium or its modified medium containing no plant growth regulator or containing both BAP and IBA as plant growth regulators; and the regenerated plantlets can be efficiently acclimatized to outdoor conditions by transplanting the regenerated plantlets to a mixture of river sands and crushed brick pieces in a mixing ratio of 1:1 by volume and acclimatizing the transplanted plantlets to outdoor conditions in an acclimatization box; and in this manner, trees of genus Gmelina can be propagated on a large scale.
摘要:
A connection structure for connecting a loader bucket, through a mounting bracket pivotable by extension and contraction of a cylinder, to a forward end of a boom assembly vertically movably attached to a working vehicle. The mounting bracket includes a pivot element and an engaging member. The mounting bracket is pivoted by the cylinder with the pivot element anchored to a hook provided on the bucket, to engage the engaging member with an engageable member provided on the bucket. Upon completion of this engagement, a lock mechanism is operable to cause a locking pin to extend through and latch the engaging member and engageable member.
摘要:
A loader having a working implement is removed from a tractor by placing the implement and a stand into contact with the ground as spaced apart from each other in the direction of advance of the tractor, disconnecting each of masts from a mount, subsequently advancing the tractor to raise the mast off the mount with the ground contact portion of the stand serving as a fulcrum and cause the implement and the stand to support the loader in a standing state, and thereafter retracting the tractor. The loader is attached to the tractor by advancing the tractor toward the loader in the standing state to set the mount in position in the rear of the mast, further advancing the tractor to incline the stand downwardly rearward and fit the mast into the mount from above, thereafter connecting the mast to the mount and removing the stand.
摘要:
An object of the present invention is to provide a kidney-imaging agent which is composed of bioabsorbable materials, transiently accumulates in a kidney for a short period of time, and does not remain in the kidney for a prolonged time after accumulation. The present invention provides a kidney-imaging agent which comprises a gelatin-like protein.
摘要:
An OSNR measuring device n OSNR measuring device includes an input port to which a signal light is given; a wavelength filter which includes a variable passband, and selectively takes out an optical component corresponding to a signal optical wavelength to be measured from the signal light; a wavelength control circuit which controls the passband of the wavelength filter; a delay interferometer which branches a light output from the wavelength filter and delays one of the branched lights with respect to the other branched light and in which the branched lights are made to interfere with each other; a photodetector which detects a power of a delay interference light output; and an OSNR calculation circuit which calculates, based on a bandwidth of a passband of the wavelength filter and the power of the delay interference light, an optical signal to noise ratio of a signal optical wavelength to be measured.
摘要:
There are provided an information processing device, an information processing method, an information processing program, and a recording medium having the information program recorded therein which can present, to a seller, information which enables a setting of, for example, adequate putting-up conditions according to a putting-up purpose of an item. The information processing device acquires transaction history information of an item related to item information of an item specified by a seller for putting-up, from a database which stores transaction history information of items put up in the past. Further, the information processing device extracts transaction history information of other items which suit to a putting-up purpose of the item by the seller, as suited transaction history information, from the extracted transaction history information. Furthermore, the information processing device generates presentation information which indicates a sample of input content of setting items set in an input form by the seller for putting-up, based on the extracted suited transaction history information, and transmits the presentation information to the terminal device.
摘要:
A fuel consumption amount evaluation system is disclosed. The system includes a rotational speed detecting section (5b) for detecting an engine rotational speed of the engine-driven traveling vehicle as a measured rotational speed, an accelerator opening degree detecting section (5a) for detecting an accelerator opening degree, a fuel injection amount calculating means (50) for calculating a fuel injection amount per predetermined unit from the accelerator opening degree and the measured rotational speed, and a mileage evaluating section (54) for effecting a mileage evaluation based on the fuel injection amount calculated by the fuel injection amount calculating means (50).