摘要:
A piezoelectric resonator is provided which is capable of acquiring an excellent Q characteristic while letting a film thickness of an upper electrode be larger. The piezoelectric resonator has a lower electrode and an upper electrode with a piezoelectric film being sandwiched between them. By applying a voltage between the lower and upper electrodes to let a bulk acoustic wave propagate through inner portions of the piezoelectric layer, a signal having a specified resonant frequency is obtained. The standing wave has a first wave loop at an interface on a side opposite to the piezoelectric film of the upper electrode and a wave node and a second wave loop in inner portions of the upper electrode directing from the interface toward the piezoelectric film. The film thickness of the upper electrode obtained when a wavelength of a standing wave is defined as “λ” is 0.4λ to 0.7λ.
摘要:
A mold-removal hole (60) formed upon forming a locking portion (39) and communicating with a tab insertion hole (31) is formed before a locking portion (39) by partly cutting a wall of the tab insertion hole (31). As this mold-removal hole (60) is formed, preventing portions (70) for preventing a displacement of the tab (22) inserted into the tab insertion hole (31) toward the mold-removal hole (60) are formed on the wall of the tab insertion hole (31) at the lateral sides of the mold-removal hole (60) and at the opposite widthwise outer sides of the locking portion (39). By displacing the position of the locking portion (39) toward one widthwise side from the center of the cavity (32), the preventing portion (70) provided at the other side is set to have an increased area of engagement with the tab (22).
摘要:
A nitrous acid salt is added at a temperature of 10 to 80° C. to an aqueous solution which contains an optically active 2-aminocarboxylic acid (4) and a protonic acid, the amount of the latter acid being 1 to 3 equivalents to the former, and which has a proton concentration of 0.5 to 2 mol/kg to conduct a reaction to thereby produce an optically active 2-hydroxycarboxylic acid (1). Thionyl chloride and a basic compound are caused to act on the compound (1) to chlorinate it and simultaneously invert the configuration in the 2-position. Thus, an optically active 2-chlorocarboxylic acid chloride (5) is induced. The compound (5) is hydrolyzed to induce an optically active 2-chlorocarboxylic acid (2). The compound (2) is reacted with a thioacetic acid salt to incorporate an acetylthio group thereinto and simultaneously invert the configuration in the 2-position to thereby produce an optically active 2-acetylthiocarboxylic acid (3).
摘要:
An electronic component according to an embodiment of the present invention comprises a resonator, a mounting substrate, and an electric connection member. The resonator has a terminal. The mounting substrate has a first principal surface, a second principal surface opposite to the first principal surface, and an electrode provided in a hole intersecting with the second principal surface. The electric connection member electrically connects the electrode of the mounting substrate to the terminal of the resonator. One end of the electrode of the mounting substrate is provided along the second principal surface. The electric connection member is provided on the one end of the electrode of the mounting substrate. The resonator is provided on the electric connection member so that the terminal of the resonator is in contact with the electric connection member.
摘要:
The present invention is directed to a video signal switching apparatus having editing function to select an arbitrary video signal from plural video signals or carry out synthesis thereof, which allows an operation unit to be of modular configuration every respective functions to electrically connect adjacent modules of panel modules (22A to 22D) which serve as respective operation modules to each other by relay bases (23), (24) to carry out transmission of signals between both modules, and to allow connection between the panel modules (22A to 22D) and the relay bases (23), (24) to be connector connection to thereby have ability to freely change layout of the panel modules (22B to 22D) of division size in which 19 inches rack size is fundamental in accordance with fondness of operator.
摘要:
A line buffer unit stores the pixel values of image data for respective lines in synchronism with pixel clocks and a horizontal sync signal. An output counter generates a coordinate value to specify a pixel position in second image data based on the count value of predetermined clocks and the horizontal sync signal, and a data request unit converts the generated coordinate value into a pixel position in input image data on the basis of the set scale value. The pixel values of pixels required for arithmetic operations are acquired from the line buffer unit based on this pixel position, and an arithmetic unit calculates the pixel value of a pixel corresponding to the coordinate value. When the arithmetic unit is not ready to execute the arithmetic operation of the pixel value, generation of the coordinate value by the counter is stopped until the arithmetic unit is ready to execute the operation.
摘要:
The present invention is to efficiently and simply prepare an optically active 7-substituted-2-aminotetralin with industrial advantage. In the process, a 7-substituted-2-tetralone or its bisulfite adduct is reduced with a microorganism to an optically active 7-substituted-2-tetralol. Then, a sulfonyl group is introduced to the hydroxy group to form an optically active 7-substituted-2-sulfonyloxytetralin. Then, with inversion of the configuration, a nitrogen substituent is introduced using a nitrogen nucleophile to form an optically active 2,7-substituted tetralin. Furthermore, if necessary, the nitrogen substituent is converted into a non-substituted amino group. Thus, an optically active 7-substituted-2-aminotetralin or its salt is prepared.
摘要:
In order to obtain a plane lattice hollow concrete slab having a high workability and a high sound insulating property, and a cross arm brace used in the plane lattice hollow concrete slab, the plane lattice hollow concrete slab comprises a light weight body 5 buried in a small space 4 which is partitioned on a grid by upper reinforcing bars 3a and 3b and lower reinforcing bars 2a and 2b positioned on a grid in a slab. The light weight body is a solid-core or a hollow light weight ball body. The light weight body has a diameter which passes through a top surface of the small space and which does not pass through a side surface of the small space. The light weight body is fixed to a predetermined position by a cross arm brace which is positioned on the upper reinforcing bar. The cross arm brace comprises at least two auxiliary reinforcing bars positioned in parallel between upper reinforcing bars adjacent to each other, and a plurality of units each of which is fixed downwardly on the auxiliary reinforcing bar. Each of the units is inserted into a small space formed by upper reinforcing bars which are positioned on a grid. A light weight ball body is fixed to a predetermined position of the small space.
摘要:
A hydroxygallium phthalocyanine pigment is characterized by having a maximum peak wavelength within a range of from 810 nm to 839 nm in optical absorption spectrum in a wavelength range of from 600 nm to 900 nm.
摘要:
A wet paper web transfer belt comprises a base body, a wet paper web side layer, and a machine side layer. The wet paper web side layer is formed of a high molecular weight elastic section, and fibers and filler particles are exposed at its surface. The fibers and filler particles are exposed in the form of an island-sea structure comprising islands section where the fibers are exposed, and a sea section where the filler particles are exposed. The fibers and the filler particles, both exposed at the wet paper web side layer, hold water at different times in the papermaking process as the wet paper web moves out of the press part of the papermaking machine.