摘要:
There is provided a bubble column type hydrocarbon synthesis reactor which synthesizes a hydrocarbon compound by a chemical reaction of a synthesis gas including hydrogen and carbon monoxide as main components, and a slurry having solid catalyst particles suspended in liquid. The hydrocarbon synthesis reactor includes a reactor main body which accommodates the slurry, a synthesis gas supplying section which supplies the synthesis gas to the slurry; one pressure sensor which is arranged higher than the liquid level of the slurry to measure the pressure of the synthesis gas above the liquid level, another pressure sensor which is arranged lower than the liquid level of the slurry to measure the pressure of the slurry, and a liquid level detecting device which detects a liquid level position of the slurry on the basis of measurement results of the pressure sensors. A plurality of the other pressure sensors are provided at arbitrary intervals in an axial direction of the reactor main body.
摘要:
There is provided a semiconductor optical modulator capable of performing a stable operation and having an excellent voltage-current characteristic to an electric field while exhibiting the characteristic of a semiconductor optical modulator with an n-i-n structure. The semiconductor optical modulator includes a waveguide structure that is formed by sequentially growing an n-type InP clad layer (11), a semiconductor core layer (13) having an electro-optic effect, a p-InAlAs layer (15), and an n-type InP clad layer (16). An electron affinity of the p-InAlAs layer (15) is smaller than an electron affinity of the n-type InP clad layer (16). In the waveguide structure having such a configuration, a non-dope InP clad layer (12) and a non-dope InP clad layer (14) may be respectively provided between the n-type InP clad layer (11) and the semiconductor core layer (13), and between the semiconductor core layer (13) and the p-InAlAs layer (15).
摘要:
A memory controller for reading data stored in a nonvolatile memory that includes a number of erasable blocks containing a number of pages. A logical/physical address control table stored in a logical/physical address control table block of the nonvolatile memory is searched, read, and manipulated in the nonvolatile memory.
摘要:
A recording method and apparatus for recording data that is continuously input in a nonvolatile memory records the data discretely in a plurality of blocks under control of file management data, is capable of high speed data recording by only recording data in a recording medium during data recording and updating of file management data at a time after completion of data recording.
摘要:
A composition for topical application comprising at least one surfactant having a nitrogen atom in the moiety thereof and at least one compound selected from the group consisting of cyclohexane and the derivatives thereof, cyclohexene and the derivatives thereof, and cyclohexanone and the derivatives thereof.
摘要:
The present invention relates to novel (tetrahydro-3-furanyl)methylamino derivatives of the following formula (1): ##STR1## wherein the variables are defined in the specification, which are useful as insecticides.
摘要:
Novel dialkoxymethylimidazolidine derivatives of the formula (1) ##STR1## are described. Also, a preparation process of the derivatives and insecticidal compositions comprising the same are set forth. In addition, novel intermediate compounds of the formula (2) useful in preparing the derivatives of the formula(1) are also described along with their preparation process ##STR2##
摘要:
An improved transistor structure having a substrate, base and emitter regions formed in the major surface thereof includes an insulating film having first and second portions. The first portion of the insulating film is formed on the major surface of the substrate covering the pn junctions between the emitter, base and substrate proper, while a second portion of the film is spaced apart from the pn junction. The second portion of the film has a thickness larger than that of the first portion of the film.
摘要:
In a semiconductor device wherein an insulating film is provided on that surface of a semiconductor substrate to which a base-collector junction extends, two annular electrodes are formed with the junction formed therebetween. One of the electrodes is maintained at base potential, while the other electrode is maintained at collector potential. Thus, moisture or like contaminants adhering to the insulating film are prevented from leading to the generation of excessive channel current.
摘要:
To lengthen the insulating distance from a conductive member to the outer surface of a housing while curtailing any increase in the size of a connector, a plurality of ribs are formed on a cover which protrude towards a housing and surround the outer periphery of a housing chamber in the housing. Grooves are formed in the housing for insertion of the ribs. The plurality of ribs provided in the cover include a first rib positioned in the longitudinal direction relative to the housing chamber, and a second rib positioned on the side of the housing chamber with an opening for insertion of another connector.