摘要:
In a data base processing method including a central processing unit for analyzing a plurality of queries made from a plurality of users so as to determine an internal processing procedure with respect to a data base, and for performing the internal processing procedure; a secondary storage for storing data capable of being shared by each user; and, an input/output controlling processing unit including at least one cache storage, for controlling a transfer of a plurality of records which are required for input/output processing operations between the central processing unit and secondary storage. The data base processing method is featured in that a decision is made whether or not a prefetching operation is carried out at a start of an input/output processing operation by judging the internal processing procedure which has been formed by the query; a retrieval range into which a record to be fetched has been stored is formed when the prefetching operation is performed; and, a prefetching record number is determined as an input/output processing demand unit, taking account of an access characteristic of the internal processing procedure and also a system characteristic containing a size of the cache storage, a performance, of the central processing unit, and a traffic of the input/output processing unit.
摘要:
With respect to input/output requests; a microprogram controls collection of data according to the data format; data accessing divides the requests for every recording medium and performs asynchronous processing; an on-line process is carried out in view of the processing priority order of the requests; parallel accessing sets requests for each medium; buffer control assures a block buffer and a page address list before receiving requests; data accessing sets a list of CCHHR codes in response to a continuous characteristic of the stored state in the recording medium; and mode deciding judges the two data transfer modes, a page search mode and a data search mode, in response to the requests.
摘要:
There is disclosed an image forming apparatus for achieving plural image processing modes. The original image is divided into plural areas, and a monocolor or multi-color reproduction is selected for each of the thus divided areas, so that the resulting reproduction contains a mixture of monocolor image areas and multi-color image areas.
摘要:
An image processing system contains a plurality of recording units, each for recording an image on a separate recording material, which are coupled together so that a recording material on which an image is recording on a first recording unit is detected and fed to the next recording unit so as to receive a second image from the second unit and thereby form an overlay on a single recording material.
摘要:
A temperature and humidity compensating device is provided in electrophotographic apparatus including a photosensitive medium having a photoconductive layer, an image forming unit for forming an electrostatic latent image on the photosensitive medium, a heat source disposed near the photosensitive medium for heating the latter, a temperature detector disposed remotely from the heat source for detecting the temperature of the photosensitive medium, and control means for controlling the heating of the heat source so that the temperature of the photosensitive medium detected by the detector is not lower than the ambient temperature. Thus, the photosensitive medium may be prevented from deterioration due to falling temperature and moisture absorption, thereby permitting a normal image formation to be achieved.
摘要:
A copying or printing machine includes processing units operative for reproducing a copy of an original, a read-only memory having program sequences stored which are composed of coded steps necessary for accomplishing printing or copying cycles, and a random-access memory in which a set of coded signals may be written in and read out. The processing units are actuated in response to coded signals in accordance with the program sequences.
摘要:
There is disclosed a method of maintaining at a desired level the temperature of components in a copying machine which is in its idle state. An electric power is supplied members in the machine having an impedance component after the copying operation has been stopped. The voltage of the power must be set at a value lower than the rated voltage of the members.
摘要:
There is disclosed an invention for generating contract information for an image forming apparatus for which the user is going to conclude a contract. The history information of an image forming apparatus used by the user and having a contract history is stored and managed in correlation with the user. Such management is executed in a center server capable communication with the image forming apparatus through a predetermined communication channel. The above-mentioned information includes contract term, machine type, number of print outputs etc. of the image forming apparatus. Also the image forming apparatus to be managed includes that currently contracted and that contracted in the past. In case the user wishes to conclude a new contract for an image forming apparatus, new contract information is generated according to the history information managed by the center server in correlation with the user. This invention provides a system capable of realizing the foregoing.
摘要:
The present invention is concerned with a rotary electric component having a groove for adjustment with a screw-driver. In the rotary electric component, a rotor having a screw-driver groove and a through hole, with an electrically conductive pattern being formed on the underside thereof, is mounted rotatably on a support shaft which is inserted into the through hole.
摘要:
A bushing base plate comprised of a bushing base raw plate containing a circular or irregular aperture having inner surfaces and inner diameters; and a hollow tube having outer surfaces and out diameters which is inserted into the aperture and bonded thereto by thermal diffusion. Prior to insertion of the tube in the aperture, the outer diameters are greater than the inner diameters, thereby producing a pressing force between the outer surfaces of the tube and the inner surfaces of the aperture.