摘要:
A mobile communication system comprises a plurality of transfer devices configured to transfer packets to a visited position of a mobile terminal, a plurality of connection management devices arranged in a network and configured to connect to the mobile terminal, and a mobile terminal including a detection unit configured to detect the transfer device, and a communication unit configured to connect to the connection management device, and transmit/receive packets to/from the transfer device detected by the detection unit via the connection management device.
摘要:
An abnormality detection circuit for a resolver outputs a rotation angle signal corresponding to a rotation angle of a rotor from a resolver winding. In the abnormality detection circuit, the resolver abnormality detection circuit applies a specified signal to one terminal of the resolver winding, determines whether the specified signal is superimposed on the rotation angle signal outputted by an other terminal of the resolver winding, and detects abnormalities of the resolver based on results of the determination.
摘要:
A process for producing an α-olefin oligomer by oligomerization of an α-olefin in a presence of a Ziegler-based catalyst, the process comprising introducing at least a portion of a reaction product which is taken out of a reactor and has a temperature of 115° C. or higher into an external heat exchanger, cooling the introduced reaction product, maintaining an oligomerization solution taken out of the external heat exchanger at a temperature of 110° C. or higher and returning at least a portion of the oligomerization solution to the reactor. In the production of an α-olefin oligomer, precipitation and adhesion of polymers at the inside of manufacturing apparatuses such as the external heat exchanger and troubles caused thereby can be prevented and a stable continuous operation can be continued for a long time.
摘要:
There is disclosed a process for producing an ethylenic oligomer which comprises subjecting ethylene to oligomerization reaction in an organic solvent in the presence of a Ziegler based catalyst, and recyclingly using for the oligomerization reaction, the organic solvent separated by distilling the resultant oligomerization reaction product, wherein the water concentration in the oligomerization reaction system is at most 8 ppm by weight, or the concentration of olefins which have at least 3 carbon atoms and which are contained in the organic solvent to be recycled in the oligomerization reaction system is at most 2% by weight. The process of the present invention can maintain the catalytic activity of the catalyst at a high level.
摘要:
A semiconductor strain gauge bridge circuit device is disclosed to include a bridge circuit of semiconductor strain gauges, a first zero-point temperature compensation circuit connected to one of a pair of output terminals of the bridge circuit and including a voltage-dividing resistor circuit generating a voltage substantially equal to a potential appearing at the one output terminal at a predetermined temperature, and a second zero-point temperature compensation circuit connected to the other of the output terminals and including a resistive element having a temperature characteristic similar to that of the semiconductor strain gauges.
摘要:
There is a bridge circuit which is driven by a constant-current including a thermistor. The bridge circuit is constituted by strain gages defined by P-type diffused layers. Strain gages which constitute in combination the bridge circuit are defined by diffused resistor layers having a surface impurity concentration which is set so as to fall within the range from 2.3.times.10.sup.18 to 2.5.times.10.sup.18 atoms/cm.sup.3. The B constant of the thermistor is selected so as to fall within the range from 1400K to 2400K.
摘要:
In an integrated pressure sensor, a silicon chip for pressure detection and a substrate for supporting the silicon chip are made of the same material, the silicon chip has a thin diaphragm portion and a peripheral fixed portion thicker than the diaphragm portion, and the silicon chip is bonded to the substrate through a thin insulating film.
摘要:
An electronic control apparatus includes a control unit 2; a plurality of power supply units 1-1, 1-2 for supplying the control unit 2 with power; and a power supply fault detector unit 3 for detecting a fault in the plurality of power supply units 1-1, 1-2. The control unit 2 operates in a normal mode on electric power supplied from the plurality of power supply units 1-1, 1-2, when none of the plurality of power supply units 1-1, 1-2 is faulty. If at least one of the plurality of power supply units 1-1, 1-2 is faulty, the control unit 2 operates in an energy saving mode in which less power is consumed on electric power supplied from the power supply unit that remains fully operational. Thereby an electronic control apparatus is obtained that enables continued operation during a faulty condition, while preventing circuit scale, dimensions, weight, and cost from increasing.
摘要:
A comparator circuit for comparing outputs of an on-chip redundant system is mounted on a second semiconductor chip that is separate from the on-chip redundant system. The second semiconductor chip which preferably contains a power source circuit for supplying power to the on-chip redundant system, a driver circuit for driving an output circuit, and the like are mounted. With this configuration, the influence of a failure occurring in the on-chip redundancy system can be prevented from being exerted on the comparator measure.
摘要:
The present invention is directed to improve reliably of an on-chip redundancy system by preventing influence of a physical failure exerted on an entire semiconductor chip. A comparator measure for comparing outputs of an on-chip redundancy system is mounted on a semiconductor chip different from the on-chip redundancy system. The another semiconductor chip is, preferably, mounted on a semiconductor chip on which a power source circuit for supplying power to the on-chip redundancy system redundantly having the comparing function in the chip, a driver circuit for driving an output circuit, and the like are mounted. With the configuration, the influence of a failure occurring in the on-chip redundancy system can be prevented from being exerted on the comparator measure.