摘要:
A top ring has gas seal and oil control functions realizing approximately the same amount of oil consumption and blow-by gas as realized by three rings. A piston assembly includes a piston body having a top land portion and a ring groove on its periphery, and a piston ring having a U-shaped cross section including upper and lower leg portions and a base portion connecting the leg portions, and attached to the top land portion. Axial length from boundary of the base portion of the piston ring and the upper leg portion to a lower surface of the lower leg portion is larger than that from an upper surface of the top land portion to lower surface of the ring groove fitting the lower leg portion. Alternatively, axial grooves are on a thrust side of the top land portion, or a V-shaped annular groove is in a second land portion.
摘要:
A file memory stores data corresponding to identifiers of an allocated area in an identifier space. A first memory stores a basis position of the allocated area in the identifier space. A second memory stores a weight of the storage apparatus as a performance degree. A first decision unit decides a space width to divisionally allocate the identifier space with another storage apparatus by using the weight and a weight of another storage apparatus. Another storage apparatus allocates a neighboring area of the allocated area in the identifier space. A second decision unit decides the allocated area of an area between the basis position and a basis position of the neighboring area in the identifier space by using the space width.
摘要:
The invention provides an optical communication apparatus to communicate a data signal. The optical communication apparatus is capable of firmly carrying out optical communication using an optical transmission media. The optical transmission media may be connected between a first optical communication apparatus and a second optical communication apparatus. Upon a detector detecting an incoincidence between an electric signal outputted from a light receiving element and a test signal, a controller may control a parameter of a light emitting power control signal to increase an intensity of an optical signal outputted from a light emitting element. Upon the detector detecting a coincidence therebetween, the controller may set a current value of a parameter of the light emitting power control signal as a parameter upon a selector selecting the data signal.
摘要:
A refrigerator, having a motor for driving a compressor, an inverter for controlling the operation of the motor, a converter responsive to AC to perform a boosting function to supply DC of variable voltage to the inverter, converter control means for controlling the converter so that a plurality of DC voltages are outputted thereby and inverter control means for controlling the inverter in pulse width modulation each of the plurality of voltages. The lowest voltage among the plurality of voltages being a voltage which turns off the boosting function of the converter.
摘要:
An optical transmitter-receiver according to the present invention is an optical transmitter-receiver connected to an optical fiber used for a single-core two-way optical communication channel for making a first optical signal S1 to be sent incident upon the end of the optical fiber and receiving a second optical signal S2 sent via the optical fiber. The above optical transmitter-receiver is provided with emission means for emitting a first optical signal S1, an optical system for making a first optical signal S1 from the emission means incident upon the incident end of the optical fiber in a direction R1 different from a direction in which a second optical signal S2 is outgoing from the end of the optical fiber and light receiving means for receiving a second optical signal S2 outgoing from the end of the optical fiber.
摘要:
There is provided a hydrogen-absorbing alloy comprising, as a principal phase, at least one kind of phase selected from the group consisting of a first phase having a hexagonal crystal system (excluding a phase having a CaCu5 type crystal structure) and a second phase having a rhombohedral crystal system, the hydrogen-absorbing alloy having a composition represented by the following general formula (1): R1−a−bMgaTbNiZ−X−Y−&agr;M1XM2YMn60 (1) wherein R is at least one kind of element selected from rare earth elements (which include Y), T is at least one element selected from the group consisting of Ca, Ti, Zr and Hf, M1 is at least one element selected from the group consisting of Co and Fe, M2 is at least one element selected from the group consisting of Al, Ga, Zn, Sn, Cu, Si, B, Nb, W, Mo, V, Cr, Ta, Li, P and S, and the atomic ratios of a, b, X, Y, &agr; and Z are respectively a number satisfying the conditions of: 0.15≦a≦0.37, 0≦b≦0.3, 0≦X≦1.3, 0≦Y≦0.5, 0≦&agr;≦0.135, and 2.5≦Z≦4.2.
摘要翻译:提供一种吸氢合金,其包含作为主相的至少一种相,其选自具有六方晶系的第一相(不包括具有CaCu 5型晶体结构的相)和第二相 具有菱方晶系的吸氢合金具有由以下通式(1)表示的组成:其中R是选自稀土元素(包括Y)中的至少一种元素,T是至少一种元素 选自由Ca,Ti,Zr和Hf组成的组,M1是选自Co和Fe中的至少一种元素,M2是选自Al,Ga,Zn,Sn, Cu,Si,B,Nb,W,Mo,V,Cr,Ta,Li,P和S,a,b,X,Y,α和Z的原子比分别为满足以下条件的数:0.15 <= a <= 0.37,0 <= b <= 0.3,0 <= X <= 1.3,0 <= Y <= 0.5,0 <=α<= 0.135和2.5 <= Z <= 4.2。
摘要:
There is provided a hydrogen-absorbing alloy comprising at least one crystal phase consisting essentially of at least one unit cell which has a laminate structure comprising at least one A2B4 subcell and at least one AB5 subcell, and the aforementioned at least one unit cell satisfying the following formula (1), 0.5
摘要:
A nickel-hydrogen secondary battery having a negative electrode comprising a hydrogen-absorbing alloy containing magnesium, a rare earth element and nickel as essential elements, which is capable of suppressing the self-discharge being occurred under the condition of high temperature storage, or the like. This secondary battery comprises a negative electrode containing a hydrogen-absorbing alloy, a positive electrode containing nickel hydroxide, a separator comprising a non-woven fabric, and an alkaline electrolyte. The hydrogen-absorbing alloy is represented by (R1−xMgx)NiyAz (wherein R is at least one element selected from rare earth elements (including yttrium), Ca, Zr and Ti, A is at least one element selected from Co, Mn, Fe, V, Cr, Nb, Al, Ga, Zn, Sn, Cu, Si, P and B), and x, y and z are atomic ratio individually defined as 0
摘要:
There is provided a hydrogen-absorbing alloy which contains an alloy ingot manufactured by means of a casting or sintering method or a pulverized product of the alloy ingot, and the alloy ingot being represented by the following general formula (1),(Mg.sub.1-a-b R1.sub.a M1.sub.b)Ni.sub.z (1)wherein R1 is at least one element selected from rare earth elements (including Y), M1 is at least one element selected from elements having a larger electronegativity than that of Mg (excluding the elements of R1, Cr, Mn, Fe, Co, Cu, Zn and Ni), and a, b and z are respectively a number satisfying conditions 0.1.ltoreq.a.ltoreq.0.8, 0 0, and 3.ltoreq.z.ltoreq.3.8.
摘要:
A computer system and its power management method capable of realizing a software control of the power supply with respect to the main memory according to a program's main memory utilization state, which are suitable for the power saving in a portable information terminal. In a computer system having a main memory device formed by a plurality of memory banks, a power source for supplying a power to operate the main memory device, and a processor for executing programs and managing allocation and release of memory regions on the main memory device with respect to the programs, a memory power management function determines any unused memory bank in which all memory regions are currently unused according to a state of the allocation and release of the memory regions on the main memory devices with respect to the programs managed by the processor, and selectively stops a power supply from the power source to the unused memory bank while supplying the power from the power source to remaining memory banks other than the unused memory bank.