Showing papers by "Mitsubishi published in 1992"

Estimation of average switching activity in combinational and sequential circuits

Abstract: The authors address the problem of estimating the average power dissipated in VLSI combinational and sequential circuits, under random input sequences. Switching activity is strongly affected by gate delays and for this reason a general delay model is used in estimating switching activity. The method takes into account correlation caused at internal gates in the circuit due to reconvergence of input signals. In sequential circuits, the input sequence applied to the combinational portion of the circuit is highly correlated because some of the inputs to the combinational logic are flip-flop outputs representing the state of the circuit. Methods are presented to probabilistically estimate switching activity in sequential circuits. These methods automatically compute the switching rates and correlations between flip-flop outputs. >

Machining apparatus with automatic restart function

Abstract: A laser cutting apparatus which allows cutting to be automatically restarted or redone without intervention from an operator once a cutting error or fault occurs. In a first embodiment, when the fault occurs the apparatus discontinues processing on the product corresponding to the fault. Thereafter, it moves to, and restarts cutting at, a starting position of the next product to be cut. In a second embodiment, the apparatus corrects a fault and continues cutting on the product corresponding to the fault by restarting cutting at the fault point. It determines whether a restart is possible at the point of the fault based on the type or definition of the fault. If a predetermined number of restarts are attempted at the point of fault without a successful restart, then the apparatus moves to a new start position. In another embodiment, the apparatus uses a profile sensor to prevent machine damage by sensing the position of the cutting head relative to the workpiece.

Drug-containing protein-bonded liposome

Abstract: A drug-containing protein-bonded liposome comprising a liposome containing a drug and having maleimide residues on its surface, and a protein and residues of a compound having a polyalkylene glycol moiety, bonded via respective thiol groups to the maleimide residues.

Multiple phases of polymer gels

Abstract: SYNTHETIC polymer gels are known to exist in two phases, swollen and collapsed1,2. Volume transitions may occur between the phases either continuously or discontinuously. We report here that more than two phases can be found in gels consisting of copolymers of randomly distributed positively and negatively charged groups. In these gels, polymer segments interact with each other through attractive or repulsive electrostatic interactions and through hydrogen bonding. It is the combination of these forces that seems to result in the existence of several phases. Each phase is characterized by a distinct degree of swelling, with abrupt jumps between them. The number of phases depends on the proportions of positively and negatively charged monomers, and decreases from a maximum of seven to just one for pure cationic or anionic gel compositions. The existence of these phases presumably reflects the ability of macromolecular systems to adopt different stable conformations in response to changes in environmental conditions.

Hybrid integrated circuit device

Abstract: A hybrid integrated circuit device includes a circuit board having at least two electrical conductors; a chip resistor bridgingly disposed across two of the electrical conductors of the circuit board; and solder electrically connecting the chip resistor to the two electrical conductors. The chip resistor has an electrically insulating substrate, two electrodes disposed on the electrically insulating substrate, separated from each other, and each electrode has a contact end electrically contacting the electrical conductors of the circuit board and a resistor element disposed on the electrically insulating substrate and electrically connected to the contact ends of the electrodes. The solder electrically connects the electrodes of the chip resistor to the electrical conductors of the circuit board.

Artificial intelligence software shell for plant operation simulation

Abstract: An artificial intelligence software shell for plant operation simulation includes a blackboard module including a database having objects representing plant elements and concepts A rule-based knowledge source module and a case-based knowledge source module, in communication with the blackboard module, operate on specific predefined blackboard objects A user interface module, in communication with the blackboard module, enables a user to view blackboard status information A control module, in communication with the blackboard module and the knowledge source modules, receives input data and controls operation of the knowledge source modules in accordance with a predetermined knowledge source priority scheme

Non-contact IC card

Abstract: A non-contact IC card include a data transmitting/receiving device, a memory, a CPU, a first determining device, a second determining device, and a stopping device. When the data transmitting/receiving device receives a request signal, the first determining device determines whether first system identification information stored in the memory agrees with second system identification information contained in the request signal. At the same time, the second determining device determines whether use of the IC card indicated by use authorization information stored in the memory is authorized. When the first and second system identification information do not agree or when the use authorization information indicates that use of the IC card is not authorized, the stopping device stops the operation of the CPU until the next request signal is received.

Distance detecting apparatus for a vehicle

Abstract: A distance detecting apparatus can not only measure the distance to a target preceding vehicle but also detect obstacles such as an intervening vehicle, other vehicles running around or adjacent the target vehicle without any movement of the apparatus itself. The apparatus includes a window setting device (13) for setting a plurality of distance-measuring windows (21 through 25) on a screen (20) on the basis of one of two image signals generated by a pair of video cameras (5, 6), a switch (14) for setting an image-following window (26) enclosing the preceding vehicle to be followed, and a CPU (12) for measuring the distance to an object in each distance-measuring window as well as the distance to an object in the image-following window.

Text search system for locating on the basis of keyword matching and keyword relationship matching

Abstract: A text information extraction device extracts analysis networks from texts and stores them in a database. The analysis networks consist of lines each including elements and relations extracted from the texts. The analysis networks are complemented via synonym/near synonym/thesaurus process and via complementary template and the lines thereof are weighted via concept template. A text similarity matching device judges similarity of input and database analysis networks on the basis of agreements of words, word pairs, and lines. A text search system stores texts and complementary term lists prepared therefrom in respective databases. Queries are inputted in the form of analysis networks from which sets of keywords and relations are extracted. After searching the texts and complementary term lists stored in databases with respect to the keywords extracted from each input query, agreements of the sets of keywords and relations are determined.

Microwave IC package

Abstract: A surface mountable microwave IC package includes a dielectric substrate; a ground conductor disposed on a front surface of a dielectric substrate on which a microwave IC chip is disposed and grounded; and a transmission line for connecting the microwave IC chip to a coplanar line on a package substrate outside the microwave IC package. The upper coplanar line is disposed on the front surface of the dielectric substrate and includes the ground conductor on which the IC chip is disposed. The lower coplanar line is disposed on the rear surface of the dielectric substrate. The intermediate coplanar line penetrates through the dielectric substrate and connects the upper coplanar line to the lower coplanar line. Therefore, the microwave transmission path from the package substrate to the IC chip is a coplanar transmission line so that a continuous transmission mode is maintained through the microwave transmission path. As a result, reflection of high frequency signals caused by the mismatching of characteristic impedances in the microwave transmission line is significantly reduced.

Biosynthesis and Hydrolysis of Poly(γ-glutamic acid) from Bacillus subtilis IF03335

Abstract: Poly(γ-glutamic acid) (PGA) production in Bacillus subtilis IF03335 was studied. When citric acid as a carbon source was added to a glutamic acid medium containing L-glutamic acid and ammonium sulfate, a large amount of pure PGA was produced. On the other hand, when glucose was added to the glutamic acid medium, a by-product was produced, which seemed to be a polysaccharide. Moreover, the mode of hydrolysis was investigated with PGA in aqueous solutions at 80, 100, and 120°C by monitoring the time-dependent changes in the molecular weights. Hydrolytic degradation of PGA was found to proceed through a random chain scission.

Packaged semiconductor device having tab tape and particular power distribution lead structure

Abstract: A packaged semiconductor device having an LOC structure, a thin body, and good electrical characteristics employs a TAB tape. A semiconductor chip carries ground pads arranged in a row, power pads arranged in another row, and signal pads arranged in two rows on both sides of the rows of ground and power pads. A shared ground lead and a shared power lead extend along and are connected to ground pads and power pads, respectively.

Natural language database retrieval system using virtual tables to convert parsed input phrases into retrieval keys

Abstract: The database information retrieval system includes a parser for parsing a natural language input query into constituent phrases with a analysis of the syntax of the phrase. The parser may make use of tables and or dictionaries to aid in terminology identification and grammatical syntax analysis. The system also includes virtual tables for converting phrases from the natural language query into retrieval keys that are possessed by the database. The virtual tables account for particles or terms that modify the phrases in the natural language query. A collating unit is provided in the system for preparing a query or retrieval formula executable in the database from the retrieval keys provided by a virtual table the collating unit selects. Lastly, the system contains a retrieval execution unit for retrieving data from the database on the basis of the database retrieval formula produced by the collating unit.

A 100-MHz 2-D discrete cosine transform core processor

Abstract: A 100-MHz two-dimensional discrete cosine transform (DCT) core processor applicable to the real-time processing of HDTV signals is described. An excellent architecture utilizing a fast DCT algorithm and multiplier accumulators based on distributed arithmetic have contributed to reducing the hardware amount and to enhancing the speed performance. A layout scheme with a column-interleaved memory and a new ROM circuit are introduced for the efficient implementation of memory-based signal processing circuits. Furthermore, mean values of errors generated in the core were minimized to enhance the computational accuracy with the word-length constraints. Consequently, it features the fastest operating speed and the smallest area with sufficient accuracy to satisfy the specifications in CCITT recommendation H.261. The core integrates about 102 K transistors and occupies 21 mm/sup 2/ using 0.8- mu m double-metal CMOS technology. >

Neurotransmitter release from synaptotagmin-deficient clonal variants of PC12 cells

Abstract: Synaptotagmin (p65) is an abundant synaptic vesicle protein of neurons and contains regions similar to the regulatory domain of protein kinase C. These domains are thought to be involved in calcium-dependent interaction with membrane phospholipids during exocytosis. To assess the functional role of synaptotagmin, synaptotagmin-deficient clonal variants of PC12 cells were isolated. All of the variant cells released catecholamine and adenosine triphosphate in response to elevated intracellular concentrations of calcium, which suggests that synaptotagmin is not essential for secretion of catecholamine and adenosine triphosphate from PC12 cells.

Motor car traveling control device

Abstract: An object of this invention is to provide a motor car traveling control device which measures the distance between a first car and a second car ahead of it while tracking the image of the second car, and, when the second car changes the traveling lane, informs the driver on the first car of it, and causes the first car to keep the present speed. A motor car traveling control device comprises: inter-cars distance detecting means (31) of image tracking type for measuring the distance between a first car and a second car ahead of it; lane change detecting means (32); and speed controlling and lane change informing means (36,35,28,29,31) which, when the second car changes its traveling lane, informs the driver on the first car of it, and causes the first car to keep the present speed.

Antenna circuit for non-contact IC card and method of manufacturing the same

Abstract: An antenna circuit for a non-contact IC card exchanges signals with an external device utilizing electromagnetic waves. The antenna circuit includes a coil and a capacitor connected to form a resonant circuit. The coil includes a main coil having a spiral conductive pattern disposed on a peripheral portion of a substrate and a plurality of adjusting patterns, each electrically connecting a portion of the conductive pattern corresponding to a desired number of turns of the main coil to an end of the main coil. The plurality of adjusting patterns are disconnected from the main coil, except for one adjusting pattern, to obtain a coil of desired inductance.

Catalyst for polymerizing an olefin and method for producing an olefin polymer

Abstract: A catalyst for polymerizing an olefin which consists essentially of a product obtained by contacting (A) a metallocene-type transition metal compound, (B) at least one member selected from the group consisting of clay, clay minerals, ion exchanging layered compounds, diatomaceous earth, silicates and zeolites, and (C) an organic aluminum compound.

Ball end mill

Abstract: A ball end mill is disclosed which includes a tool body having an axis of rotation therethrough and having a forward end portion, and a cutting edge provided on the forward end portion of the tool body and having an arcuate shape as viewed in a direction opposite to the direction of rotation of the tool body. The cutting edge is comprised of a radially inner portion disposed adjacent to the axis of rotation of the tool body and extending radially inwardly of the tool body in a direction opposite to the direction of rotation of the tool body, and a radially outer portion extending from the inner portion radially outwardly and axially rearwardly of the tool body. Each of the inner and outer portions of the cutting edge is formed of a two-layered composite sintered complex having a base layer of cemented carbide and an upper layer of sintered super hardened compact disposed on the base layer and containing cubic boron nitride, diamond or the like. The composite sintered complex defining the outer portion of the cutting edge is arranged such that the upper layer is directed in the direction of rotation of the tool body while the composite sintered complex defining the inner portion of the cutting edge is arranged such that the upper layer is directed forwardly of the tool body.

Plasma processing apparatus and plasma cleaning method

Abstract: There are disclosed apparatus and method for eliminating, by plasma cleaning, reaction products which are generated by etching and stick to an inner wall surface of a chamber. First to third conductive blocks (90a to 90c) are mounted on the inner wall surface of the chamber (50) through an insulator (92). A high-frequency electric field is applied sequentially between a first electrode (61) and the respective conductive blocks (90a to 90c) while a reactive gas is introduced into an internal space (51) of the chamber (50), to produce a plasma of the reactive gas. The reaction products which stick to the respective conductive blocks (90a to 90c) are sequentially gasified by the plasma of the reactive gas and exhausted to the outside of the chamber (50) to be eliminated.