摘要:
A dielectric ceramic composition for high frequencies consisting essentially of 83 to 99.8 wt% of a basic composition composed of 22 to 43 wt% of titanium dioxide, 38 to 58 wt% of zirconium dioxide and 9 to 26 wt% of stannic oxide, and 0.2 to 17 wt% of one or two addditives selected from the group consisting of lanthanum oxide, cobaltic oxide and zinc oxide. The dielectric ceramic composition has high permittivity and high Q and is suitable for use as dielectric resonators in microwave bandpass filters, or as antennas employed at microwave frequencies, or as substrates for microwave circuits.
摘要:
A dielectric ceramic composition for microwave applications consists essentially of a sintered mixture represented by the general formula:(1-x)MgTiO.sub.3 --x(Ca.sub.1-y Me.sub.y)TiO.sub.3wherein Me is at least one rare earth element selected from the group of Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu, and wherein x and y are molar fractions of respective components and take values within the following respective ranges: 0.03.ltoreq.x.ltoreq.0.15, 0.001.ltoreq.y.ltoreq.0.06. The composition is a fine-grained, dence ceramic and enables to produce microwave devices with high permittivity, high quality factor and small temperature coefficient of resonance frequency.
摘要翻译:用于微波应用的电介质陶瓷组合物基本上由以下通式表示的烧结混合物组成:(1-x)MgTiO3-x(Ca1-yMey)TiO3,其中Me是选自Y,La中的至少一种稀土元素 Ce,Pr,Nd,Pm,Sm,Eu,Gd,Tb,Dy,Ho,Er,Tm,Yb和Lu,其中x和y是各成分的摩尔分数,取值在以下各自的范围内:0.03 = x = 0.15,0.001 / y = 0.06。 该组合物是细晶粒陶瓷,能够生产具有高介电常数,高品质因数和较小的谐振频率温度系数的微波器件。
摘要:
A dielectric resonator device includes a casing for defining a chamber in which a dielectric resonator and a piezoelectric frequency adjusting unit are provided. A portion of the piezoelectric frequency adjusting unit is located adjacent the dielectric resonator. By the voltage applied to the piezoelectric frequency adjusting unit, the piezoelectric frequency adjusting unit changes its shape thereby changing the distance between the portion of the piezoelectric frequency adjusting unit and the dielectric resonator. Thus, the resonance frequency of the dielectric device can be controlled.
摘要:
An inverter device that controls a motor using a signal from a position sensor for detecting a rotor rotational position of the motor includes an initial adjustment unit that outputs a phase of current for designating a motor rotational position by rotating the motor in a clockwise direction of the motor and a phase of current for designating the motor rotational position by rotating the motor in a counter-clockwise direction of the motor.
摘要:
A first analyzing step is a step that conducts numerical analysis of a flow field but does not conduct numerical analysis of a temperature field in a state in which a motor rotor is rotating. The second analyzing step is a step that conducts numerical analysis of both the flow field and the temperature field after the first analyzing step ends. Accordingly, before numerical analysis of the flow field and numerical analysis of the temperature field are conducted together, numerical analysis is conducted first on the flow field in first analyzing step before it is conducted on the temperature field. As a result, compared with when the second analyzing step is executed from the beginning without conducting the first analyzing step, the calculation load of the numerical analysis on an electronic calculator can be reduced, which enables the time that it takes to conduct the numerical analysis to be shortened.
摘要:
A communication device is driven by an on-demand driver installed in an apparatus that includes an on-demand driver generating program that generates the on-demand driver for the communication device based on device information of the communication device. The communication device includes a memory unit that stores therein the device information of the communication device, a responding unit that, in response to a request for obtaining the device information from the on-demand driver generating program, sends the device information stored in the memory unit to the apparatus, and an updating unit that is used in externally updating the device information stored in the memory unit.
摘要:
The state monitoring apparatus includes a high-voltage side monitoring section having monitoring units assigned to respective unit batteries and a low-voltage side monitoring section having a control device. The monitoring units measures the voltages of the unit batteries upon reception of a voltage measurement command transmitted from the control device, and determines whether or not the measured voltages are within a predetermined range. This determination is transmitted to the control device. If this determination is negative, the control device limits a charge/discharge current of the assembled battery, and then causes the monitoring units to transmit the measured voltages.
摘要:
An aeration-less water treatment apparatus including an anaerobic reactor which receives sewage to cause the sewage to flow as an upward stream, and an aerobic reactor which receives treated water from the anaerobic reactor to cause the water to flow as a downward stream so that the water contacts aerobic microorganisms and air to aerobically treat the polluted matter in the water, the apparatus further including a suspended sludge section located in a lower part of the anaerobic reactor and in which the anaerobic microorganisms are suspended in the sewage, and a carrier section located in an upper part of the anaerobic reactor and having carriers to which the anaerobic microorganisms are attached, the anaerobic microorganisms having flowed from the suspended sludge section being further attached to the carriers.
摘要:
A vehicle power supply apparatus has first and second engine-driven electrical generators and first and second storage batteries, the first generator supplying a stable voltage to the first battery and a first set of loads, and the second generator supplying the second battery and a second set of loads, which can tolerate supply voltage variations. Operation of the second generator and charging/discharging of the second battery are controlled to maintain the total engine torque applied to the generators at a level whereby fuel consumption is reduced, while the supply voltage of the variation-tolerant loads is allowed to vary substantially.
摘要:
The invention provides a virus harboring a DNA encoding a subunit of limulus-derived factor G, the virus being capable of mass-producing a (1→3)-β-D-glucan assay reagent of satisfactory quality, steadily and at low cost, a cell harboring the virus, and a method of producing factor G by use of the cell.