受験番号：30IPE021

問１
What is claimed is:1.

An artificial satellite comprising a Doppler compensating circuit

including:a Doppler estimating portion for acquiring a reception power level of a
reception wave and a time variation of the reception power level, deriving a
Doppler frequency of a satellite on the basis of the reception power level of thereception wave and the time variation of the reception power level, andoutputting the Doppler frequency as an estimated Doppler frequency; anda multiplying portion for offsetting a local frequency for modulation by theestimated Doppler frequency by multiplying the estimated Doppler frequency by
the local frequency.

2.

The artificial satellite according to claim 1,
wherein the Doppler estimating portion is configured to acquire thereception power level of the reception wave and the time variation of thereception power level, calculate the Doppler frequency of the satellite on thebasis of the reception power level of the reception wave and the time variation of
the reception power level while treating light speed, a position of a transmitting
station, a carrier wavelength λ, an equivalent isotropic radiated power oftransmission, and a reception antenna gain Gr as fixed parameters, and output
the Doppler frequency to the multiplying portion as the estimated Doppler
frequency.

3.

The artificial satellite according to claim 1,
wherein the Doppler estimating portion is configured to acquire thereception power level of the reception wave and the time variation of thereception power level, calculate candidates of the estimated Doppler frequency
on the basis of the acquired reception power level of the reception wave whilereferring to reference information in which candidates of the estimated Doppler
frequency prepared in advance so as to correspond to the reception power levelof the reception wave are recorded, select the estimated Doppler frequency fromthe candidates on the basis of the time variation of the reception power level,
and output the selected Doppler frequency to the multiplying portion.

問２
In recent years, a fuel battery device including a fuel battery cell capableof obtaining electric power using a fuel gas (hydrogen-containing gas) and an
oxygen-containing gas (air) has been proposed as a next generation energy
source.
A power conditioner is used in a power generation system to enable afuel battery device, which is a distributed power source, to supply a load withelectric power in association with a system power source.

The power

conditioner has a variety of functions such as an inverter function to convert thedirect current output from the fuel battery device to alternating current and acontrolling function to control the interconnection with the system power source.
The power conditioner supplies the electric power generated in the fuelbattery device to an external load in association with the system power source.
At this time, the power conditioner outputs electric power corresponding to theelectric power required by the external load by increasing or decreasing theoutput power in order to avoid the reverse power flow to the system. When theoutput power from the power conditioner to the external load is increased, theoutput current from the fuel battery device to the power conditioner decreases.
Upon detecting the decease of the output current, the fuel battery device
attempts to control operation of auxiliary equipment to increase the amount of
the oxygen gas and the fuel gas supplied to the fuel battery cell so that theamount of generated power is increased.

However, it is difficult to immediately

increase the amount of the oxygen gas and the fuel gas, which leads to a state
where the oxygen gas and the fuel gas for power generation are deficient in thefuel battery device.

Power generation in the state where the oxygen gas andthe fuel gas are deficient causes damage to the fuel battery cell, resulting in theproblems whereby the possibility of damage of the fuel battery device isincreased and the service life is shortened.

問３(1)As specifically described below, the business overview BV abstractly
illustrates outline of the businesses to be systemized using graphics whichindicate the “events”, “cores”, and the relationship therebetween and is anoverview macroscopically showing the entire practice of the company so as tobe understood by a plurality of persons. The pretreatment engine 100 has arole to clearly find out businesses and objects in the basic businesses andexpress them in a form of a business overview when the basic businessapplication is constructed.

(2)
The SVO list is a table displaying the operations performed on theoperation objects by the roles on the scenario chart and is also a table deploying
the operations at the granularity the same as that of the roles on the scenario
chart D4, that is, a table deploying the operations using, as a granularity,“functions” obtained when the roles on the scenario chart D4 are systemized.
The activity definition E2 is a definition relating to the processes (steps) for
accomplishing the roles on the scenario chart D4.