摘要:
An ultrasonic probe provided with an ultrasonic wave-transmitting/receiving element comprising a 1-3 type or 2-2 type composite piezoelectric body exposing a piezoelectric monocrystal from at least one of the faces of the composite piezoelectric body, and an electrode mounted on at least one of the faces of the composite piezoelectric body, wherein the composite piezoelectric body comprises a piezoelectric monocrystal whose electromechanical coupling coefficient ratio k.sub.33 /k.sub.t is 1.6 or more, and a resin whose acoustic impedance Zp is 4.times.10.sup.6 kg/m.sup.2 s or less.
摘要翻译:一种超声波探头,其具有超声波收发元件,该超声波收发元件包括从复合压电体的至少一个表面露出压电单晶的1-3型或2-2型复合压电体,以及安装在复合压电体的电极 复合压电体的至少一个面,其中复合压电体包括机电耦合系数比k33 / kt为1.6以上的压电单晶,声阻抗Zp为4×10 6 kg / m 2·s以下的树脂。
摘要:
A method for producing a capacitor includes: a dielectric body composed of basic alumina powder mixed with tungsten powder, interposed between a pair of electrodes disposed opposite to each other. The method includes the steps of: after a conductive alumina ceramic body has been formed by mixing the tungsten powder with the alumina powder, providing a pair of electrodes while interposing the conductive alumina ceramic body therebetween, and intermittently applying an electric current or voltage to the electrodes, high enough to break conductive paths formed in the conductive alumina ceramic body by the tungsten powder, so that the conductive ceramic body is converted to the dielectric body.
摘要:
Disclosed is a red phosphorus flame retardant comprising a fine red phosphorus powder subjected to a surface modification treatment, said fine red phosphorus powder consisting of spherical red phosphorus particles and/or agglomerates thereof directly obtained by the thermal conversion of white phosphorus in the presence of a dispersant and has an average particle size of 10 .mu.m or smaller and of which at least 80% by weight is accounted for by particles having particle sizes of 20 .mu.m or smaller, said flame retardant having an average particle size of 15 .mu.m or smaller, with the particles having particle sizes of 35 .mu.m or smaller accounting for at least 80% by weight of the flame retardant; and a nonflammable resinous composition composed of a synthetic resin and the red phosphorus flame retardant.
摘要:
In one embodiment, a permanent magnet includes a composition represented by RpFeqMrCusCo100-p-q-r-s (R: rare earth element, M: at least one element selected from Zr, Ti and Hf, 10≦p≦13.5 atomic %, 28≦q≦40 atomic %, 0.88≦r≦7.2 atomic %, 4≦s≦13.5 atomic %), and a metallic structure in which a composition region having an Fe concentration of 28 mol % or more is a main phase. A Cu concentration in the main phase is 5 mol % or more.
摘要:
The processes include: a layer superposition step in which the step of sputtering or vapor-depositing a mixture layer including a first pore-forming metal and a catalyst metal on a substrate and the step of forming an interlayer of a second pore-forming metal or a fibrous-carbon interlayer are alternately conducted repeatedly two or more times to thereby form a multilayer structure containing mixture layers and interlayers; and a pore formation step in which after the layer superposition step, the multilayer structure is subjected to a pore formation treatment.
摘要:
An inner side edge part of a PCU supporting frame is arranged at a rear-downward angle; a rear supporting bracket that connects a rear edge part of the supporting frame with a dashboard upper is arranged at a rear-upward angle; the frame main body and the PCU are pressed diagonally down-backward when a load input is received on the supporting frame from the vehicle front side; and with the rear supporting bracket being rotationally displaced by this pressing, the supporting frame and the PCU are displaced diagonally down-backward.
摘要:
In a gas combustion type fastener driving machine, a fuel gas and air are stirred by a fan within a combustion chamber, a stirred air-fuel gas mixture is burned by an ignition spark, and a striking piston is actuated by a combustion pressure to drive a fastening member. The machine is provided with a fan motor (320) for rotating the fan, and a control circuit board (100) for controlling an action of the fan motor (320). The control circuit board (100) detects an actuation signal for an igniter (310) that generates the ignition spark and controls a rotation speed of the fan motor (320) based on the actuation signal.
摘要:
Provided is a two-actor user authentication system with a reduced risk of leakage of authentication information.The two-factor user authentication system is designed to use, as a password, a one-time-password derivation rule to be applied to certain pattern elements included in a presentation pattern at specific positions so as to create a one-time password, and further use, as a second authentication factor, information identifying a client to be used by a user. An authentication server is operable to generate a pattern seed value adapted to uniquely specify a presentation pattern in combination with a client ID, and transmit the pattern seed value to an authentication-requesting client. The authentication-requesting client is operable to create a presentation pattern based on a client ID acquired therefrom, and display the presentation pattern to allow a user to enter thereinto a one-time password based on the presentation pattern.
摘要:
A fuel cell stack includes a stack of fuel cells. Each of the fuel cells includes a membrane electrode assembly and a separator that are stacked. The membrane electrode assembly includes an electrolyte membrane and a pair of electrodes sandwiching the electrolyte membrane therebetween. The terminal plate, the insulation plate, and the end plate are stacked at each end of the stack of the fuel cells in a stacking direction of the fuel cells. The terminal plate has a plurality of spaces formed therein. The spaces are separated from each other by a partition wall. A connection terminal is disposed on a plate surface of the terminal plate. The plate surface faces the insulation plate, at a position at which the connection terminal does not overlap the partition wall in the stacking direction. The connection terminal protrudes outward from the end plate in the stacking direction.
摘要:
An inductor includes a core substrate including minute column-like electrical conductors extending between a front surface and a back surface of the core substrate. Each column-like electrical conductor is insulated from adjacent column-like electrical conductors by being surrounded by an insulating material. Insulation layers are formed on the front surface and the back surface of the core substrate, respectively. At least two connection electrical conductors extend through each of the insulation layers. Each connection electrical conductor is electrically connected to a plurality of the column-like electrical conductors. Wirings are formed on each of the insulation layers to connect said connection electrical conductors to each other electrically. The wirings, the connection electrical conductors and the column-like electrical conductors are connected to form a coil in a three-dimensional manner.