摘要:
A piezoelectric ceramic composition contains a compound containing Na, Li, Nb and O, and having a perovskite structure, as a main component. The main component has a crystal phase in a semi-stable state at room temperature, such crystal phase originally not being stable at room temperature but being stable at a higher temperature.
摘要:
The present invention provides a piezoelectric ceramic composition which predominantly comprises a composition represented by the following formula:(1-n)(K.sub.1-x-y Na.sub.x Li.sub.y).sub.m (Nb.sub.1-z Ta.sub.z)O.sub.3 -nM1M2O.sub.3wherein M1 represents a divalent metal element such as Mg, Ca, Sr or Ba; M2 represents a tetravalent metal element such as Ti, Zr, Sn or Hf; and x, y, z, m, and n satisfy the following conditions: 0.9.ltoreq.X; y.ltoreq.0.3; x+y
摘要翻译:本发明提供一种压电陶瓷组合物,其主要包含由下式表示的组成:(1-n)(K1-x-yNaxLiy)m(Nb1-zTaz)O3-nM1M2O3,其中M1表示二价金属元素如Mg, Ca,Sr或Ba; M2表示四价金属元素,例如Ti,Zr,Sn或Hf; 并且x,y,z,m和n满足以下条件:0.9 <= X; y <0.3; x + y <0.75; 0 = z = 0.3; 0.98 = m 1.0; 0
摘要:
There is provided a composite antenna device for responding to waves in a plurality of radio frequency bands, including: a sheet of conductor plate; a first antenna provided on the sheet of conductor plate for responding to a linearly-polarized wave in at least one radio frequency band; and a second antenna provided on the sheet of conductor plate for responding to a circularly-polarized wave in a radio frequency band that is different from the at least one radio frequency band, wherein the first antenna has a ground portion, the second antenna is formed in an area in the ground portion, and each of the first antenna and the second antenna has a feeding point.
摘要:
Disclosed is a compound useful as a type I 11βhydroxysteroid dehydrogenase inhibitor.A compound represented by the formula: a pharmaceutically acceptable salt or solvate thereof, wherein R1 is optionally substituted alkyl or the like, one of R2 and R4 is a group of formula: —Y—R5, wherein Y is —O— or the like, R5 is substituted alkyl (the substituent is optionally substituted cycloalkyl or the like), optionally substituted branched alkyl or the like, the other of R2 and R4 is hydrogen or optionally substituted alkyl, R3 is a group of formula: —C(═O)—Z—R6, wherein Z is —NR7— or —NR7—W—, R6 is optionally substituted cycloalkyl or the like, R7 is hydrogen or optionally substituted alkyl, W is optionally substituted alkylene, X is ═N— or the like, with the proviso that compounds wherein R2 is 2-(morphorino)ethoxy, R3 is N-(1-adamantyl)carbamoyl and R1 is benzyl are excluded.
摘要:
An antenna according to the present invention comprises: a conductor plate with an axisymmetrical shape; a slot formed on the conductor plate; and a feeding point provided on the axisymmetrical axis of the conductor plate, in which the conductor plate is folded along two locations that are parallel to the axisymmetrical axis toward mutually different directions.
摘要:
Glycolide production through depolymerization of glycolic acid oligomer is stabilized by controlling impurities in the glycolic acid oligomer to allow economical and effective production of glycolide. More specifically, the depolymerization system is controlled to suppress an effective concentration (x+100y wt. %) of depolymerization-obstructing substances calculated as a total of a concentration calculated as diglycolic acid (of x wt. %) of hydroxyl group-free impurity carboxylic acids (A) and 100 times a concentration calculated as ammonia (of y wt. %) of nitrogen-containing substances (B), respectively with respect to the starting glycolic acid oligomer in the depolymerization system, to at most 15 wt. %.
摘要:
A distributed phase type circular polarized receiving module provided with a plane, a power feed point 4 formed on the plane, and a group of narrow conductors 101 having a substantially one-dimensional current distribution, and the narrow conductors being distributed in two dimension on the plane, a transistor 9 connected to the power feed point 4, sums of projections of complex vectors of current distributions induced on the narrow conductors 101 in first and second directions orthogonal to each other defined on the plane are determined in amplitude and phase, such that amplitudes are approximately equal to each other and a phase difference is approximately 90°.
摘要:
A group of metallic conductors 1 are prepared and a power feed point 2 is formed at one of the metallic conductors to provide a circular polarized wave antenna. The circular polarized wave antenna is designed such that an absolute value of a sum of projections of an electric current induced on the metallic conductors in x-axis and an absolute value of a sum of projection of the electric current in y-axis that is spatially orthogonal to the x-axis are approximately equal to each other, and an absolute value of a difference between an argument of the sum of the projections in the x-axis and an argument of the sum of the projection in the y-axis is approximately 90°.
摘要:
Various component parts of a driver circuit for drive sources such as electric motors and clutches, such as relays and FETs as well as the drive sources can be tested by selectively energizing the relays and evaluating the voltage levels of the selected points by using the first and second test voltage detection circuits. This testing process is typically executed before the power up of the drive circuit. The test current is so small that the drive sources would not be inadvertently activated and various components would not be damaged even when there is any faulty component in the driver circuit. When any faulty component is detected in the testing process, the driver circuit may be prevented from being powered up so that any undesired operation of the drive sources or permanent damage to various components owing to such a faulty component may be avoided.
摘要:
A pattern extraction computational algorithm has: using a bus, a CPU, a storage area, an input and an output of a computer to conduct the pattern extraction computational algorithm; storing a size of a limited area, a size of a minute area, a starting point from which the minute area is arranged, a matrix with information on an attribute of an element, and an matrix with information on the minute area in the storage area; and patterning a structure based on a topology composed of a plurality of elements with attributes by using a rule in the size of the limited area to extract all patterns to accord to the topology.