公开(公告)号：DE69930100T2

公开(公告)日：2006-10-26

申请号：DE69930100

申请日：1999-06-24

Applicant: ST MICROELECTRONICS SRL

Inventor： RIZZOTTO GIANGUIDO ,  CAPONETTO RICCARDO ,  DIAMANTE OLGA

IPC: B60G17/015 ,  B60G23/00 ,  B60G17/018 ,  B60G21/10

Abstract: A vehicle comprises at least one semiactive suspension (5) arranged between a vehicle body (2) and a wheel (4) and having a damping coefficient that can be varied in a controlled way by an actuator (14) governed by a control device (18). The control device comprises an accelerometric sensor (15) generating a vehicle body acceleration signal; a potentiometer (16) generating a suspension position signal; a signal conditioning unit (21) for the calculation of the vehicle body speed and the damping speed; a fuzzy control unit (23) which calculates the subsequent position of the actuator on the basis of the vehicle body speed and of the damping speed; and a driving unit (21) which generates a control signal (S1) for the actuator.

公开(公告)号：DE602004001158D1

公开(公告)日：2006-07-27

申请号：DE602004001158

申请日：2004-03-19

Applicant: ST MICROELECTRONICS SRL

Inventor： KOCAREV LJUPCO ,  AMATO PAOLO ,  RIZZOTTO GIANGUIDO

IPC: H04L9/00

Abstract: An encryption process which is both secure and practical, does not require modular arithmetic, and therefore is very fast, and may be used for realizing a digital signature process, comprises the following steps: choosing preliminarily at least a private key and a set of permutable functions defined on a certain phase space for encrypting/decrypting messages, choosing a code for encoding messages to be sent in the form of a number belonging to the phase space, and wherein the set of permutable functions is composed of chaotic maps generated by a composite function of a first function, a second function and the inverse of the first function, the private key is defined by using the second function. It is possible to implement public-key encryption processes and related digital signature processes using chaotic maps by a computer program.

公开(公告)号：DE69421377T2

公开(公告)日：2000-03-23

申请号：DE69421377

申请日：1994-02-28

Applicant: ST MICROELECTRONICS SRL

Inventor： MANCUSO MASSIMO ,  POLUZZI RINALDO ,  RIZZOTTO GIANGUIDO

IPC: H04N5/21 ,  G06T5/20 ,  H03H21/00 ,  H04N1/409

Abstract: Filter achieving noise reduction and digital signal image edge exaltation comprising first and second noise reduction circuit means 2 and 3 designed to elect an image edge. Said first and second noise reduction circuit means 2 and 3 comprise each a first and second comparison element (S1,S2,S3,S4) whose input terminals are designed to receive separate digital signals of an image and an inferential circuit (C1,C2) connected to said comparison elements. Each inferential circuit (C1,C2) comprises a fuzzy logic unit designed to define activation levels (Vi) dependent upon signals generated by the comparison elements. The filter (1) comprises also a noise detection circuit (4) and an image edge detection circuit (6) both connected to the noise reduction circuit means (2,3) and designed to perform operations in accordance with fuzzy logic rules on the basis of activation levels (Vi) defined in the inferential circuits (C1,C2). The filter 1 also includes a noise reduction circuit (5) connected to the noise detection circuit (6) and designed to filter the digital image signals on the basis of the operations performed by the circuit (4). In the filter (1) is also included an image edge exalting circuit (7) connected to the noise reduction circuit (5) and to the image edge detection circuit (4) designed to perform on filtered digital image signals an image edge exaltation on the basis of the operations performed by the image edge detection circuit (6).