受験番号：30IPE020

Claim1An artificial satellite comprising a Doppler compensation circuit comprising:a Doppler estimation unit configured to acquire a received power level of a received
wave and a time variation of the received power level, and derive a Doppler frequency ofthe satellite based on the received power level of the received wave and the timevariation of the received power level, and output the Doppler frequency as an estimatedDoppler frequency;
a multiplication unit configured to offset a local frequency for demodulation by theestimated Doppler frequency, by multiplying the estimated Doppler frequency and thelocal frequency signal.
Claim2
The artificial satellite according to Claim1, wherein the Doppler estimation
unit acquires the received power level of the received wave and the time variation of thereceived power level, and calculates the Doppler frequency of the satellite based on thereceived power level of the received wave and the time variation of the received power
level, and outputs the Doppler frequency, as the estimated Doppler frequency, to themultiplication unit, where a speed of light, a position of a transmitting station, a carrier
wavelength λ, a transmission equivalent isotropic radiated power, and a receiving
antenna gain Gr are regarded as fixed parameters.
Claim3
The artificial satellite according to Claim1, wherein the Doppler estimation
unit acquires the received power level of the received wave and the time variation of thereceived power level, calculates, referring to reference information that includes
candidates for the estimated Doppler frequency provided in advance in association withthe received power level, the estimated Doppler frequency candidates based on theacquired received power level of the received wave, selects an estimated Doppler
frequency from among the candidates based on the time variation of the received power
level, and outputs the estimated Doppler frequency to the multiplication unit.

In recent years, as a next-generation energy, a fuel cell device including a fuel battery

cell that can obtain electric power using fuel gas (hydrogen-containing gas) andoxygen-containing gas (air) has been proposed. A power conditioner is used in thepower generation system in order for the fuel cell device, which is a distributed powersource, to supply power to the load in cooperation with the system power supply. The
power conditioner has various functions such as an inverter function for converting thedirect current output from the fuel cell device into an alternating current, and a control
function for performing cooperation control with the system power supply. The power
conditioner supplies, in cooperation with the system power supply, the power generated
by the fuel cell device to the external load. At this time, the power conditioner outputs
power according to the power demand from the external load by increasing ordecreasing the output power so as not to generate reverse power flow to the system.
When the output power from the inverter to the external load increases, the output
current from the fuel cell device to the power conditioner decreases. When the fuel cell
device detects a decrease in output current, it attempts to increase the amount ofoxygen gas and fuel gas supplied to the fuel cells by controlling the operation of theauxiliary device, in order to increase the power generation amount. However, it isdifficult to increase the amount of oxygen gas and fuel gas instantaneously, and thus,
oxygen gas and fuel gas for power generation may become insufficient in the fuel celldevice. Hence, there are problems such as power generation with insufficient oxygengas and fuel gas that causes damage to the fuel cells, leading to an increased risk of
breakage of the fuel cell device, and shortened service life of the fuel cell device.

The business bird's-eye view BV, which will be described later in detail, is a bird's-eyeview that abstracts and illustrates the overall picture of the business to be systemized
using "events", "cores", and figures showing their relationships, thereby illustrating theentire business operations of a company from a macro-perspective, and in a way
multiple people can understand.

The pre-processing engine 100 functions, whenbuilding the core business application, to clearly identify the business and the target ofthe core business and express them in the form of a business bird's-eye view.
The SVO list E1 is a list displaying the operations the roles on the scenario chart
perform on the operation target. The SVO list E1 is a list that is developed with thesame granularity as the rolls on the scenario chart D4, in other words, with the"function" when the rolls on the scenario chart D4 are systematized serving as thegranularity. Also, the activity definition E2 includes definitions regarding processes(steps) for completing roles on the scenario chart D4.