摘要:
A management apparatus has a structure definition input unit for inputting the structure definition of information, a data definition input unit for inputting a data definition that represents entities of information and the relationship between the entities in accordance with the input structure definition, and a modeling unit for interpreting the input definitions and constraints to convert them into an ER model. Since an ER model can be obtained independently of the formats of input definitions, a user can freely define the structure of information as he or she likes regardless of the complexity of the structure, and need not relate information bidirectionally, and can freely and easily defines the structure of information.
摘要:
The present invention provides a refrigerant composition that is nonflammable, and ensures low LCCP and less burden on the environment. More specifically, the present invention relates a refrigerant composition containing difluoromethane (HFC32), pentafluoroethane (HFC125), and 2,3,3,3-tetrafluoropropene (HFO1234yf), the ratio of HFC32/HFC125/HFO1234yf being in a range surrounded by points (0/21/79 mass %), (16.6/25.3/58.1 mass %), and (0/28.4/71.6 mass %) in a ternary diagram of a refrigerant composition containing HFC32, HFC125, and HFO1234yf, and the composition essentially containing HFC32.
摘要:
A supercharging apparatus for an engine comprising a high-pressure stage supercharger having a high-pressure stage turbine arranged in an exhaust gas passage of the engine and a high-pressure stage compressor that is arranged in an intake gas passage of the engine and is driven by the high-pressure stage turbine, and a low-pressure stage supercharger having a low-pressure stage turbine arranged in the exhaust gas passage on the downstream side of the high-pressure stage turbine and a low-pressure stage compressor that is arranged in the intake air passage on the upstream side of the high-pressure stage compressor and is driven by the low-pressure stage turbine, wherein the low-pressure stage compressor has a capacity larger than a capacity of the high-pressure stage compressor, and the low-pressure stage turbine has a capacity equal to, or smaller than, a capacity of the high-pressure stage turbine.
摘要:
A data storing device of the present invention includes a cylindrical or hollow cylindrical data storing medium rotatable about its own axis and having a storage layer formed on its circumferential surface for storing data. A head adjoins the storage layer for writing or reading data in or out of the storage layer. A head moving mechanism causes the head to move back and forth along the axis of the data storing medium. A drive motor includes a stator and a rotor spaced from the stator and directly coaxially connected to the data storing medium.
摘要:
The invention provides a refrigerant comprising a mixture of three compounds selected from the group consisting of hydrofluorocarbons represented by the formula ClHmFn (1) wherein when l is 1, m is an integer of 1 or 2, n is an integer of 2 or 3 and m+n=4; when l is 2, m is an integer of 1 to 4, n is an integer of 2 to 5 and m+m=6; and when l is 3, m is an integer of 1 to 3, n is an integer of 5 to 7 and m+n=8.
摘要翻译:本发明提供一种制冷剂,其包含三种选自以下组中的三种化合物的混合物,所述三种化合物由式(Ⅳ)所示的氢氟烷代表,当l为1时,m为1或2的整数,n为2或3的整数,m + n = 4 ; 当l为2时,m为1〜4的整数,n为2〜5的整数,m + m = 6。 当l为3时,m为1〜3的整数,n为5〜7的整数,m + n = 8。
摘要:
The present invention provides:(1) a solvent composition comprising chloropentafluoropropane and 1,1-dichloro-1-fluoroethane; and(2) a solvent composition comprising chloropentafluoropropane and dichlorotrifluoroethane.
摘要:
An ultrasonic motor driving circuit has a drive duty generating circuit that intermittently outputs a drive request signal according to the battery voltage, and a drive signal output means that receives the drive request signal to output a drive signal. The drive signal is in the form of bursts with pause intervals, the pause intervals being variable with a change in the battery voltage thereby improving utilization of the battery capacity.
摘要:
Compositions using for working fluids and heat-transfer media comprising 81 to 100 parts by weight of 2,2,3,3,3-pentafluoropropanol and 0 to 19 parts by weight of water.
摘要:
Working fluids for use with the Rankine cycle comprising 5 to 50% by weight of tetrafluoromethane, 40 to 95% by weight of trifluoromethane and 0 to 10% by weight of monochlorodifluoromethane.