Abstract: An electrical grid control system includes a plurality of power conversion apparatuses each storing active power relationship information indicating a relationship between an active power control level representing a level of control for active power output to an electrical grid, and a connection point frequency being a frequency at a connection point to the electrical grid; and a control apparatus that repeatedly receives information indicating a system frequency measured in the electrical grid, determines the active power control level based on the system frequency, and transmits the active power control level to the plurality of power conversion apparatuses. Each power conversion apparatus repeatedly measures the connection point frequency, receives the active power control level from the control apparatus, and controls the active power based on the measured connection point frequency, the received active power control level, and the active power relationship information.

Abstract: A welding camera (1) is constructed with: a lens (11) for focusing incident light; an optical filter (12) that comprises a neutral density filter for reducing the amount of the incident light, an ultraviolet cut filter for cutting ultraviolet rays, and a green band-pass filter for transmitting green light; a CMOS imaging unit (13) that has a wide dynamic range function, and detects the light which has passed the optical filter (12); a video signal processing unit (14) that has an automatic gain control function and a digital signal processor, and outputs an image signal, which covers a range of a low-intensity dark part to high-intensity arc light, to a display unit on the basis of an electric signal that is input from the CMOS imaging unit (13).

Abstract: An electrical grid control system includes a plurality of power conversion apparatuses each storing active power relationship information indicating a relationship between an active power control level representing a level of control for active power output to an electrical grid, and a connection point frequency being a frequency at a connection point to the electrical grid; and a control apparatus that repeatedly receives information indicating a system frequency measured in the electrical grid, determines the active power control level based on the system frequency, and transmits the active power control level to the plurality of power conversion apparatuses. Each power conversion apparatus repeatedly measures the connection point frequency, receives the active power control level from the control apparatus, and controls the active power based on the measured connection point frequency, the received active power control level, and the active power relationship information.

Abstract: A welding camera (1) is constructed with: a lens (11) for focusing incident light; an optical filter (12) that comprises a neutral density filter for reducing the amount of the incident light, an ultraviolet cut filter for cutting ultraviolet rays, and a green band-pass filter for transmitting green light; a CMOS imaging unit (13) that has a wide dynamic range function, and detects the light which has passed the optical filter (12); a video signal processing unit (14) that has an automatic gain control function and a digital signal processor, and outputs an image signal, which covers a range of a low-intensity dark part to high-intensity arc light, to a display unit on the basis of an electric signal that is input from the CMOS imaging unit (13).

Abstract: To achieve a fluid level measurement instrument requiring no detecting pipe that can accurately measure over a long period of time a fluid level in a tank for storing therein fluid without having to use a detecting pipe for sampling the fluid from the tank. A balance tube 41 has no detecting pipes and a solenoid coil 45 is wound around an outside of the balance tube 41. A float 46 containing therein a magnetic material 47 is disposed inside the solenoid coil 45. A cover 59 formed, for example, of metal covers an outer surface of the float 46 to prevent entry of fluid and hydrogen from outside. The float 46 moves according to a fluid level in the balance tube 41, which results also in inductance of the solenoid coil 45 being changed. Measuring the inductance of the solenoid coil 45 allows the fluid level of the balance tube 41 to be measured without having to use the detecting pipe.

Abstract: A time zone when the operation pattern is obtained with a high learning convergence and a time zone when such an operation pattern cannot be obtained are set in advance. In the case where a significant difference develops between a target operation pattern and an actual load pattern, it is possible to accurately determine whether the operation is to be continued without changing the operation pattern or the operating conditions such as the hydrogen production amount should be changed in accordance with the actual load pattern. As a result, based on the scheduled operation with a predetermined operation pattern, the operation can be easily corrected in accordance with the complicated load change in home applications.

Abstract: The present invention exhibits a remarkable effect of making it possible to provide a famotidine injection solution containing famotidine at a high concentration, being stable for a long period of time at room temperature, and having a low viscosity without impairing the absorption of famotidine, which can be hardly provided so far.

Abstract: A fuel-cell power system includes a fuel cell stacks, a power conversion unit for controlling and receiving the current from the fuel-cell stacks, a hydrogen production unit for supplying hydrogen to the fuel-cell stacks, and an operation unit for carrying out the operation with a simulated load connected for selected one of an arbitrary time and a predetermined time before the service operation of the fuel-cell power system, thereby the hydrogen production unit having the combustor for refluxing and combusting an anode off-gas is started in stable fashion at the same time as the system.

Abstract: The present invention exhibits a remarkable effect of making it possible to provide a famotidine injection solution containing famotidine at a high concentration, being stable for a long period of time at room temperature, and having a low viscosity without impairing the absorption of famotidine, which can be hardly provided so far.

Abstract: The composite circuit board comprises a substrate made of an insulating material, a thick circuit conductor, embedded in this substrate, which includes a given portion for connecting components to the thick circuit conductor and has a predetermined circuit pattern, a thin circuit conductor, provided on the surface of the substrate, which includes a land corresponding to the parts-mounting section of the thick circuit conductor and has a predetermined circuit pattern, and a conductor for electrically connecting the land and the given portion of the thick circuit conductor. In this circuit board, the land and the given portion of the thick circuit conductor are connected by a conducting member provided in the through hole.

Abstract: A system for monitoring an operating condition of a control rod drive mechanism (CRDM) having a pressure housing erectly mounted on a reactor vessel head closure, a vertically movable control rod drive shaft accommodated in the housing and an electromagnetically motive latch mechanism includes an accelerometer fitted to a housing upper end and signal recording means for receiving output signals from the accelerometer through signal processing means and recording the processed output signals.

Abstract: This invention provides an aluminum enamel board having an electrically insulating glass layer formed on an Al-Si alloy plate containing at least 5 wt % of Si or a composite metal plate having an aluminum or alloy layer formed on at least one side of a metal plate made of a metal other than aluminum. Since the Al-Si alloy plate containing at least 5 wt % of Si or a composite metal plate having the aluminum or aluminum alloy layer is used as a board, the adhesion strength between the metal plate and the electrically insulating glass layer can be increased. At the same time, a predetermined material is used to form the electrically insulating glass layer, thereby minimizing a difference in thermal conductivity and thermal expansion coefficient between the electrically insulating glass layer and the metal plate. This improves the heat conduction characteristics of the board and prevents warping of the board.