摘要:
A displacement pump includes a delivery chamber, connected to a pressure connection and a suction connection. A displacement element determines the volume of the delivery chamber and can be moved back and forth between a first position, in which the delivery chamber has a smaller volume, and a second position, in which the delivery chamber has a larger volume. The pressure connection is connected to the delivery chamber by a pressure valve and the suction connection is connected to the delivery chamber by a suction valve. The displacement pump is easy and economical to produce and simultaneously reliably provides a degassing function, whereby downtimes can be reduced and the reliability of the delivery process can be increased. With the pressure valve closed, a backflow channel connects the delivery chamber and pressure connection, through which medium can enter the delivery chamber and/or gas can escape from the delivery chamber.
摘要:
The invention relates to a rail fastening on a tie having fastening screws and loop-shaped tension clamps in which the track width can be adjusted horizontally in a stepless manner using wedge elements, the rail being arranged on a ribbed plate, the ribs of which run at an angle to the rail and a wedge that can be moved in the longitudinal direction of the rail being arranged between rail foot and the ribs. The wedge is preferably guided on the support. This makes possible effective horizontal lateral displacement of the rail or modification of the track with the use of simple and inexpensive plastic parts.
摘要:
Biomass is converted to short chain alcohols such as butanol by a process which comprises (1) reacting biomass with an oxidizing agent to produce unoxidized aromatic and/or phenolic compounds and C1-6 linear and branched, saturated and unsaturated carboxylic acids; (2) separating the unoxidized aromatic and/or phenolic compounds from the C1-6 carboxylic acids; (3) anaerobically fermenting the C1-6 carboxylic acids in the presence of an anaerobic bacterium in its solventogenesis phase to produce a solvent comprised of butanol and non-fermentable carboxylic acids. The products of the process can be used as fuel and/or fuel additives.
摘要:
In the field of wellbore data logging it is known to use isotopic neutron sources in a neutron capture logging technique. However, continuous isotopic sources are unpopular for regulatory and safety reasons.Attempts to employ neutron generator tubes to generate neutron bursts for use in the neutron capture technique have encountered various difficulties in areas connected with signal identification and processing.The disclosure relates to a method of data logging in which a low burst rate neutron generator tube is pulsed at comparatively low rates to generate neutron bursts that are captured in atomic nuclei in a proximal formation. The gamma radiation arising from the neutron capture is detected over a gating intervals defined by temporally distinct points. The gamma detector output is integrated over the gating interval to provide a measure of the decay rate that is independent of the pulse rate. Consequently the signal processing problems do not arise.
摘要:
An apparatus for presenting a sample of material for analysis by a laser-based analyzer comprises a chamber, a first window for admitting laser radiation to the chamber, sample presentation means for presenting a sample such that said laser radiation can impinge upon the sample, and a plurality of second windows (76,78,80,82) for receiving radiation emitted from the sample, said plurality of second windows (76,78, 80,82) adapted to pass radiation emitted from the sample to a plurality of detector means. The apparatus further includes a gas inlet (98) and a gas outlet (100) to enable the atmosphere inside the chamber (52) to be controlled.
摘要:
A semiconductor package of superior high frequency characteristics enabling easy mounting of a large-sized capacitor and thereby enabling fluctuation of the power supply voltage to be suppressed and enabling a reduction of the inductance of the wiring portion connecting the capacitor and a connection terminal, that is, a semiconductor package mounting a capacitor for suppressing fluctuation of a power supply voltage, wherein the capacitor is comprised of, in an attachment hole passing through the board in the thickness direction, a conductor wire to be connected to a connection terminal of a semiconductor chip at one end, a high dielectric constant material covering the conductor wire at a predetermined thickness, and a conductor layer arranged between the outer circumference of the high dielectric constant material and the inner wall of the attachment hole, provided as a coaxial structure having the conductor wire at its center, and a method of production of the same.
摘要:
The present invention relates to a latching device for securing two panels together such as those of storage structures in which an enclosure is secured by means of a door or panel which will remain in a closed position until released. The present latching system is usually used in connection with automobile glove boxes or other compartments which are to be secured for storage of items therein. The latching device has a housing, actuation means and a pawl in communication with a movable retention means. The latching device can be electrically or manually operated.
摘要:
A method of shortening cycle time required to compression mold shingle or tile is provided, wherein carrier plates are comprised of a surface material and a base, and receive a thermoplastic material, thereon. The roofing material is applied to the carrier plate and the carrier plate is subjected to induction heating, by which its surface material has its temperature raised, without substantially raising the temperature of the carrier plate base, such that the thermoplastic material applied thereto is kept heated in the compression mold. Cooling of the thermoplastic material is by heat transfer from the carrier plate surface material to the carrier plate base, and with both materials having good heat conduction capability. The carrier plate surface material has a high receptivity to being heated by induction heating relative the carrier plate base. The carrier plates are serially delivered through the process, to the compression mold.
摘要:
A method for controlling a relational database system by executing a database query in a relational database which contains, as an associated data structure, a plurality of data tables interconnected through relations, by using a database language, with a table of the relations being provided. A processable database statement without relation-related operations is created by indicating the data tables to which the processing functions are to be applied and by indicating the order of the selected data tables according to which the processing is to be carried out, and an access path, which concretely states the order of access to the database, is determined by first computing a partial access path, via the table of relations, between each two subsequent, selected data tables on the basis of the relations which exist between the subsequent data tables, and then assembling the access path from all computed partial access paths.
摘要:
The invention relates to a polyvinylammonium compound, to a method of manufacturing said compound, to an aqueous acidic solution containing at least said Polyvinylammonium compound for electrolytically depositing a copper deposit as well as to a method of electrolytically depositing a copper deposit using said aqueous acidic solution, said polyinylammonium compound corresponding to the general chemical formula (1): as well as to polyvinylammonium compounds of the general chemical formula (1), wherein one of the monomer units or both having indices I and m are present in the neutral form.