摘要:
In an ATM cell transmission system having an ATM layer device (1), a data path interface (3) and a plurality of normal PHY (Physical) layer devices (2-0 to 2-M) according to Utopia Level 2 specification, the ATM layer device (1) comprises: a cell buffer (4); FIFO memories (5-0 to 5-M) each corresponding to each of the normal PHY layer devices (2-0 to 2-M); an output controller (5′) for controlling the cell buffer (4) to output an ATM cell to be transmitted through one of the normal PHY layer devices (2-0 to 2-M) into corresponding one of the FIFO memories (5-0 to 5-M) on condition that the ATM cell is stored in the cell buffer (4) and the corresponding one of the FIFO memories (5-0 to 5-M) is not full; and a cell transmission controller (10) for performing polling of the normal PHY layer devices (2-0 to 2-M), designating a selected PHY layer device among the normal PHY layer devices (2-0 to 2-M) which have returned the HIGH level of the cell transmission allowance signal (TxClav) to the polling and whereof corresponding FIFO memories (5-0 to 5-M) are not empty, selecting one of the FIFO memories (5-0 to 5-M) corresponding to the selected PHY layer device as a next sender of cell data to be transmitted through the data path interface (3), and designating the selected PHY layer device at an end of the current transmission cycle as a next receiver of the cell data.
摘要:
A data transfer system comprises a plurality of terminals; a plurality of high-speed data transfer units connected to the terminals through a network, each data transfer unit comprising a plurality of storage devices and a storage device group control device or unit for controlling readout of data from the storage devices, and dividing and storing data requested by the terminals; a virtual storage device group controlling device or unit for controlling readout of data from virtual storage device groups, each virtual storage device group being constructed by selecting a storage device from each high-speed data transfer unit; and an instruction conversion unit or device for receiving a data readout instruction on the basis of data requests output from the terminals, which instruction is given to the virtual storage device groups, from the virtual storage device group control unit or device, and converting the instruction into a data readout instruction to the storage devices from the storage device group control unit or device. In this data transfer system, the load for the data transfer processing is equally distributed among the high-speed data transfer units even when data transfer requests are output from plural terminals.
摘要:
A power source apparatus for vehicles comprises first and second switch means respectively for controlling charging currents flowing from a rectifier of a generator to first and second batteries having equal open terminal voltages, and third switch means for controlling a current flowing through a field winding of the generator. The third switch means is controlled to be turned on/off in response to whichever of the voltages generated respectively by the first and second batteries is lower. The first and second switch means are controlled to be turned on/off on the basis of a duty factor set based on a voltage difference between the first and second batteries. When the voltage of the first battery becomes equal to or less than a predetermined voltage, that voltage being the lowest voltage that a starter motor needs to satisfactorily start an engine, the duty factor of the first switch means is made larger to charge the first battery with priority irrespective of whether the voltage of the first battery is larger than the voltage of the second battery or not.
摘要:
A cam plate is pivotably installed to the base plate by means of the pin, the base plate being to be secured to the lateral side of the seat cushion. The base plate has the toothed member pivotable installed thereon, and the toothed member has formed at the free end thereof a cam striker, concavity formed directed from the cam striker toward the base thereof and a projecting release hook contiguous to the end of the concavity. There is also formed on the cam plate a lock cam which supports the cam striker and also slides into the concavity, and a cut is formed in a portion adjoining the toothed member of the lock cam. There is installed to the toothed member a reverse spring which normally forces the lower teeth in such a direction as to engage the upper teeth. When the cam plate is pivoted in one direction, the opposite walls of the cut depresses the release hook. These walls will retain the release hook when the cam plate pivots in the opposite direction.
摘要:
A wood preservative composition comprising 2-mercaptobenzothiazole or its salt and 2,5-dichloro-4-bromophenol or its salt exerts an unexpected synergistic wood preservative effect against wood destroying fungi and termites.
摘要:
A memory system control method is a control method in a system which comprises a central processing unit, a cache memory, and a main memory, and has a DMA transfer function to said main memory, wherein when the amount of data transferred to said main memory reaches an arbitrary value, the data in the cache memory corresponding to the address of data in said main memory which have been written by the DMA transfer are purged.
摘要:
A free space detection section detects a free space of a recording medium. A recording capacity calculation section calculates a recording capacity necessary for recording a program in the form of a first encoded signal on the recording medium. A signal control section for comparing the free space detected by the free space detection section and the recording capacity calculated by the recording capacity calculation section. A signal selection section selects at least one of the first encoded signal and a second encoded signal according to a result of the comparison by the signal control section. A recording section records the encoded signal selected by the signal selection section on the recording medium. The first encoded signal is obtained by compressively encoding the program at a first compression ratio. The second encoded signal is obtained by compressively encoding the program at a second compression ratio which is higher than the first compression ratio.
摘要:
A V-belt is mounted on a first fixed conical plate and second fixed conical plate of a lower unit, and an upper unit is made to descend. A first movable conical plate and second movable conical plate are installed in the upper unit, and the V-belt is gripped between the fixed conical plates and movable conical plates. When a rotary actuator of the lower unit draws a drawbar which extends below the movable conical plate downwards, a predetermined pressure is applied to the V-belt. The first movable conical plate and first fixed conical plate are rotated in this state to drive the V-belt, and a noise test is performed.
摘要:
An apparatus for detecting, for example, the disconnection of signal lights such as flashers for vehicles and for warning of this disconnection has a detecting resistor element for converting an ON current of the signal lights into a voltage signal. The voltage signal detected by this resistor element is compared with a reference voltage which is set at a discrimination/oscillation control circuit so as to detect if the detecting voltage signal is lower than the reference voltage. When such a state is detected, the oscillation frequency of an oscillator for changing the flashing frequency of the signal light is doubled. The disconnection of the lights can be detected by observing the frequency of the flashing signal. The detecting resistor element consists of a resistive wiring formed of a resistive material which is processed so as to have a smaller resistance than desired. After the resistive wiring is connected to the discrimination/oscillation control circuit by welding or the like, the resistive wiring is depressed at least once, thereby decreasing the cross-sectional area thereof and allowing the resistance of the resistive wiring to match the reference voltage of the control circuit. The resistance of the resistive wiring is thus increased.
摘要:
Disclosed is a polyamide composition comprising a polyamide and, incorporated therein, 0.01 to 20% by weight, based on the composition, of imidazole.This composition may further comprise electrically conductive carbon black in an amount of 5 to 50% by weight based on the composition.This polyamide composition is excellent in the fluidity as the melt and a shaped article prepared from this polyamide composition is excellent in the softness.