摘要:
A hydrocarbon reforming catalyst is obtained by supporting on an inorganic porous carrier a platinum cluster-anion complex salt in an amount of 0.01 to 5 wt. % as platinum metal, a rhenium compound in an amount of 0.01 to 5 wt. % as rhenium metal and a halogen in an amount of 0.2 to 5 wt. %, and then subjecting the resultant catalyst precursor to (a) a thermal decomposition treatment an/or a reduction treatment or alternatively (b) an oxidation treatment and a reduction treatment.
摘要:
An air conditioner including an outdoor unit containing a compressor and an outdoor heat exchanger therein, at least one indoor unit having both of an indoor heat exchanger and an electric expansion valve, and a pressure reducing member which is linked to the electric expansion valve in parallel in a refrigerant circuit and serves as resistance to refrigerant flowing therethrough. The valve opening degree of the electric expansion valve of the indoor unit when a room heating operation is stopped is set to be smaller than the valve opening degree of the electric expansion valve of the indoor unit when the room heating operation is conducted, and the resistance value of the pressure reducing member is set to be smaller than the resistance value to be provided to the refrigerant in accordance with the valve opening degree of the electric expansion valve when the room heating operation is stopped.
摘要:
A voltage inverter device has a ROM which stores digital values in advance. The digital value is proportional to a voltage-time integration value of an AC output voltage waveform which corresponds to each of a plurality of basic electrical angle intervals. The digital values stored in the ROM are sequentially read out to be compared with time data supplied by a time counter. Comparison results correspond to specific electrical angles of the AC output voltage waveform. The results are combined by a logical circuit so as to obtain a control signal for generating an AC output voltage of desired waveform.
摘要:
A specific condition for enhancing the power generation efficiency of an oscillation type electromagnetic power generator is disclosed. Solenoid coils constituting the oscillation type electromagnetic power generator are wound in directions opposite to each other with a predetermined coil gap therebetween. Adjacent magnets of a movable magnet are connected to each other via a spacer having a predetermined thickness in such a manner that poles with the same polarity are opposed to each other. A coil pitch which is the total dimension of the coil length of one solenoid coil and the coil gap and a magnet pitch which is the total dimension of the magnet length of one magnet of the movable magnet and the thickness of the spacer are almost equal to each other, and the coil length is shorter than the magnet length.
摘要:
A network relay device includes a main functional portion including a relaying function for network communication, a power supply portion for converting an AC current taken from an external AC power supply to a DC current, and providing the DC current to the main functional portion, a measuring unit for measuring a value of the DC current, after the conversion to the DC current provided from the power supply portion to the main functional portion, and a computing unit for computing a total power consumption of a whole including the main functional portion and the power supply portion, based on a result measured by the measuring unit.
摘要:
A network relay device includes a main functional portion including a relaying function for network communication, a power supply portion for converting an AC current taken from an external AC power supply to a DC current, and providing the DC current to the main functional portion, a measuring unit for measuring a value of the DC current, after the conversion to the DC current provided from the power supply portion to the main functional portion, and a computing unit for computing a total power consumption of a whole including the main functional portion and the power supply portion, based on a result measured by the measuring unit.
摘要:
A control circuit of a light-emitting device comprises a negative-feedback loop including a photodetector and a sample and hold circuit. The photodetector monitors an optical signal emitted by the light-emitting device and the sample and hold circuit generates a control signal supplied to a light-emitting device driver. The sample and hold circuit performs the sampling of a monitored signal each time the light-emitting device emits light and holds the sampled monitored signal. The voltage held in the sample and hold circuit is output as the control signal the light-emitting device driver. The light-emitting device driver drives the light-emitting device to switch on and off according to the input digital data with the output light intensity of the light-emitting device controlled by the control signal so as to be kept at a constant level.
摘要:
A specific condition for enhancing the power generation efficiency of an oscillation type electromagnetic power generator is disclosed. Solenoid coils constituting the oscillation type electromagnetic power generator are wound in directions opposite to each other with a predetermined coil gap therebetween. Adjacent magnets of a movable magnet are connected to each other via a spacer having a predetermined thickness in such a manner that poles with the same polarity are opposed to each other. A coil pitch which is the total dimension of the coil length of one solenoid coil and the coil gap and a magnet pitch which is the total dimension of the magnet length of one magnet of the movable magnet and the thickness of the spacer are almost equal to each other, and the coil length is shorter than the magnet length.
摘要:
A triggered DDS generator architecture accumulates a phase increment value in response to a DDS clock to generate phase accumulator values for addressing a waveform lookup table which contains a desired output signal. A time measurement circuit determines a time interval between the arrival of a trigger signal and a subsequent cycle of the DDS clock, which time interval is used to either adjust an initial phase accumulator value or delay the DDS clock so that a constant time is maintained between the arrival of the trigger signal and the desired output signal.
摘要:
A driver circuit is provided, which has output characteristics capable of satisfying the DC and AC LVDS standards even if the power source and temperature fluctuate, has LVDS output characteristics, can reduce the number of outside components, and allows a dense package mounting. This driver circuit is constituted by connecting four NPN bipolar-type transistors and three resistors; four input signals are respectively input into base portions of these four NPN bipolar-type transistors; the first input signal and the second input signal have the same DC and AC levels but their phases are reversed, the third input signal and the fourth input signal have the same DC and AC levels but their phases are reversed; and the first input signal and the fourth input signal have the same phase, and the second input signal and the third input signal have the same phase.