Hitachi, Ltd.

Sigeo Ihara

Satoshi Itoh

Toru Toyabe

Shiroo Kamohara

Kozo Katayama

Shirun Ho

Shuichi Yamamoto

Kiyoo Itoh

Yoshio Suzuki

Hiromasa Noda

Teruo Tanaka

Naoki Hamanaka

Yoshihiro Ohta

Ryo Imura

Satoshi Ito

Tetsuo Nishikawa

Nobutoshi Sagawa

Katsuro Kikuchi

Junko Tanaka

Hitoshi Matsuo

Shin'ichiro Kimura

Kyoko Iwasawa

Tsuyoshi Uda

Peter M Lee

Miyuki Saji

Mikio Nagasawa

Yasushi Gotoh

Kirin Ka

Hiroki Nakae

Masahiko Hirao

Values of input parameters are set. Simulations are executed in parallel for individual sets of input parameters by a plurality of processors to obtain design values which are execution results. The obtained design values are compared with the design condition. Directory files are constructed for plural kinds of input parameters corresponding to design values satisfying the design condition. Accumulative distribution in the distribution of parameter input values are determined in respect of the individual kinds of input parameters. Input values of parameters to be referred are extracted on the basis of values of the accumulative distribution every kind of input parameter. The kind of input parameter, the extracted input values and the number of the extracted input values are displayed through an input interface every kind of input parameter.

Method to support the setup of input parameters

A primer design system in which DNA nucleotide sequences are obtained from a database comprising a plurality of different DNA nucleotide sequences, and the nucleotide sequences of primers capable of hybridizing specifically to the DNA thus obtained are determined. A plurality of primers capable of hybridizing specifically to mutually different DNAs can be efficiently designed.

Primer design system

Disclosed is means capable of solving trouble in managing data formats and procedures and capable of carrying out advanced preprocessing more intuitively. A data aggregate to be inputted to a mining engine is converted into hierarchical unit trees, and node conditions of the hierarchical unit trees are changed, whereby the data aggregate and a data structure are subjected to dynamic conversion/edition processing. Thus, a system is constructed, in which preprocessing for data mining is unitarily managed/semi-automated.

Production and preprocessing system for data mining

Each of a plurality of simulation programs is linked with a data conversion library and is executed as a simulation process. A data conversion process is executed in correspondence with each simulation process. In exchanging data resulted from simulation by the simulation process of one of the simulation programs with simulation processes of the other simulation programs, the data conversion process provided for a sending simulation process determines a receiving simulation process to which the data is to be sent, and sends the data to the data conversion process corresponding to the receiving simulation process. The data conversion process for the receiving simulation process performs data conversion for absorbing difference between the base of the sending simulation process and the base of the receiving simulation process, and transfers the data after the conversion to the receiving simulation process.

Method of assisting execution of plural simulation programs for coupled

An extremely high-speed, very stable system and a method for concurrent computing between heterogeneous simulators are shown, in which heterogeneous simulators for analyzing a complicated physical phenomenon are coupled based on a coupled equation thereby to obviate the disadvantages of the conventional noncoupled and coupled methods. A numerical calculation unit includes a calculation control unit equipped with an agent function having a heterogeneous coupling variational equation calculation unit, a convergence decision unit and a search vector setting unit. A parameter and a variable are supplied from the heterogeneous coupling variational equation calculation unit into and out of a simulator A, a simulator B and a heterogeneous coupled equation thereby to form the heterogeneous coupling variational equation 1 and thus to determine a globally consistent solution. With this configuration, a globally consistent solution can be obtained automatically simply by setting a heterogeneous coupled equation, and therefore the analysis and design efforts of an operator can be very effectively supported in analyzing complicated physical phenomena in all the fields of advanced science and technologies.

Method and system for concurrent computing between heterogeneous

A logical operation circuit in which wiring as generally performed between transistors is made unnecessary to improve reliability, stability and integration degree of a logical circuit using a tunnel phenomenon, for example, a single-electron tunnel phenomenon, or a flight phenomenon of a particle group. Conducting materials are arranged in a two-dimensional plane or three-dimensional space in the logical circuit. When two conducting materials are arranged to be nearest each other, the two conducting materials are connected, for example, by a single-electron tunnel phenomenon. When two conducting materials are arranged to be not nearest, there is no connection between the conducting materials by the tunnel phenomenon. Propagation of electrons is controlled by changing the arrangement. Further, because particles which have entered input regions move toward different flight directions respectively from a branch region on the basis of the property that two particles cannot enter simultaneously within an effective scatter distance by repulsive interaction between particles, flight of particles is controlled so as to enter or not branched particles into an observation region to thereby construct a wiringless logical operation circuit.

Wiringless logical operation circuits

Carbon atoms are arranged stably in the form of a torus or in the form of a helical coil to give novel topological properties to the carbon atoms to thereby provide various functions of carbon molecules. A plurality of sixfold rings each including six carbon atoms are arranged in the form of a torus, and then these sixfold rings are partially replaced by fivefold and sevenfold rings to obtain a stable structure. That is, a part of the outer wall surface of a torus constituted by a plurality of sixfold rings and a part of the inner wall surface of the torus are replaced by fivefold rings and sevenfold rings respectively to obtain a stable structure. Further, a molecule in which carbon atoms are arranged to form a toroidal or helically-coiled stable structure or a cluster in which a plurality of such molecules are arranged spatially is constructed by using an STM. Further, a micro part or device using the hole of the torus/helical coil and the inside of the ring thereof is formed by combining a plurality of such molecules/clusters.

Method for constructing a carbon molecule and structures of carbon

A generation method of particle simulation programs includes a translation and discretization process of equation of motion of particles for recognizing attributes of a space and particles based on information of the particle simulation to generate expressions of calculations, tables, and internal data and a generation process of programs for creating calculation programs and simulation input data from the generated expressions of calculations, tables, and internal data. According to information inputted from a screen of a graphic terminal, various control conditions are produced to control processes of the simulation.

Program generation method for particles simulation

An interband single-electron tunnel/transistor utilizes an interband single-electron tunneling phenomenon between a valence band and a conduction band through a p-n junction. The transistor includes the combination of microcapacities as fundamental constituent elements each formed by joining a p-type semiconductor material doped with an impurity in the degree of concentration with which a Fermi level overlaps a valence band and an n-type semiconductor material doped with an impurity in the degree of concentration with which the Fermi level overlaps a conduction band. The microcapacity includes a p-n junction having a junction area with which interband electron tunneling is inhibited due to Coulomb blockade.

Interband single-electron tunnel transistor and integrated circuit

A finely structured grooved gate transistor of which the threshold voltage does not decrease in spite of the small size and of which the threshold voltage of the transistor can be adjusted by shape. The shape of a groove corner of the transistor as a semiconductor device is contained in a concentric circle having a radius of curvature r.+-.L/5 (L: channel length) and the radius of curvature r, i.e., the geometric parameter has a relationship with the doping concentration as shown in FIG. 1B. Alternatively, the average (a+b)/2 (geometric parameter) of the sum of the two sides opposite the right angle of a right triangle formed of a straight line in contact with the gate bottom in parallel to the substrate surface of a grooved gate transistor, a perpendicular line to the substrate bottom surface from the source and drain ends at a portion formed with a channel and a straight line in contact with the groove corner has a relationship with the doping concentration as shown in FIG. 1B. The threshold voltage is not reduced even when the channel length is decreased by adjusting the groove shape and the doping concentration.

Grooved gate transistor having source and drain diffused layers with

An information storage apparatus in which one unit (or one bit) of information is stored by bringing a fine tip electrode with a tip portion of a dimension on the order of an inter-atomic distance (or several angstroms) in proximity to an atom on a flat surface of a material (for example, a semiconductor) with a gap on the order of an inter-atomic distance being provided between the tip electrode and the atom, and applying a voltage to the tip electrode so that the alignment of a dimer (or a pair of atoms) on the material surface in the vicinity of the tip electrode is changed by virtue of a tunnelling effect which is a quantum mechanical effect.

Information storage apparatus

An interband single-electron tunnel transistor utilizes an interband single-electron tunneling phenomenon between a valence band and a conduction band through a p-n junction. The transistor includes the combination of microcapacities as fundamental constituent elements each formed by joining a p-type semiconductor material doped with an impurity in the degree of concentration with which a Fermi level overlaps a valence band and an n-type semiconductor material doped with an impurity in the degree of concentration with which the Fermi level overlaps a conduction band. The microcapacity includes a p-n junction having a junction area with which interband electron tunneling is inhibited due to Coulomb blockade.

A compiler for generating from a serially processed type source program described in a high level language the object codes to be executed in parallel by a parallel processor system which is composed of a plurality of processors marked with respective identification numbers and in which inter-processor data transfer system for identifying data for transfer by data identifiers is adopted. The serially executed source program is first translated to programs to be executed in parallel. The inter-processor data transfer processing is extracted from the flow of processings involved in executing the programs for parallel execution resulting from the above-mentioned translation, and all the interprocessor data transfer processings are attached with data identifiers such that no overlap takes place.

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Tokorozawa, Japan

Sigeo Ihara