108 results about "Internal variable" patented technology

Systems and methods are disclosed, especially designed for very compact hardware implementations, to generate random number strings with a high level of entropy at maximum speed. For immediate deployment of software implementations, certain permutations have been introduced to maintain the same level of unpredictability which is more amenable to hi-level software programming, with a small time loss on hardware execution; typically when hardware devices communicate with software implementations. Particular attention has been paid to maintain maximum correlation immunity, and to maximize non-linearity of the output sequence. Good stream ciphers are based on random generators which have a large number of secured internal binary variables, which lead to the page synchronized stream ciphering. The method for parsed page synchronization which is presented is especially valuable for Internet applications, where occasionally frame sequences are often mixed. The large number of internal variables with fast diffusion of individual bits wherein the masked message is fed back into the machine variables is potentially ideal for message authentication procedures.

A method and apparatus for monitoring a communication link based on TCP/IP protocol obtains a protocol data unit (PDU) between communication systems. A emulation log is produced by analyzing the PDU in a PDU analysis part. An event sequence log is produced by estimating an event sequence of both communication systems based the emulation log in an event sequence estimation part. The behavior and the internal procedure of TCP is emulated by using the specific TCP state transition specification, internal variables of TCP, internal variables indicating the status and internal procedures in the TCP emulation part.

The invention relates to an access method of Modbus equipment. The access method comprises the following steps that configuration files comprising data configuration information and protocol configuration information are preset; an intelligent equipment gathering dynamic library reads and analyzes the configuration files, and the data configuration information obtained through analysis of the configuration files is stored in internal variables of the intelligent equipment gathering dynamic library; and when the Modbus equipment is accessed, the data configuration information is extracted from the internal variables of the intelligent equipment gathering dynamic library according to operation commands to communicate with the Modbus equipment. The invention further provides an access system of the Modbus equipment. The access method and the access system of the Modbus equipment can reduce development workload, and reduce complexity of code maintenance.

A method and system for testing voice applications, such as VoiceXML applications, is provided. The system provides a run-time simulation environment for voice applications that simulates and automates user interaction. A user simulation script is provided in a customized mark-up language. The voice application is processed to derive a nominal output of the voice application. The user simulation script is processed to generate a simulated output for the voice application corresponding to the nominal output. Conditional logic may be applied to the nominal output to generate a simulated input in response thereto. The user simulation script is specified in a customized mark-up language having a set of one or more conditional tags and an internal variable for the nominal output of the voice application.

The invention provides a PLC software programming aided design method. The PLC software programming aided design method comprises a step 1 of receiving a table stored with specific parameters of a PLC software function module, the specific parameters being used for automatically and regularly generating correlated variables and finally generating PLC codes; a step 2 of enabling PLC programming auxiliary design software to automatically generate a variable identification external input-output signal list of external input-output signals; a step 3 of enabling the PLC programming auxiliary design software to generate internal intermediate variables and PLC program codes; a step 4 of introducing generated internal variable information and calling codes into PLC programming software. The PLC software programming aided design method is advantaged in that the PLC programming process is greatly simplified, errors, of codes and parameters, caused by manual input are avoided, variable names, annotation, storage regions and the like which are automatically generated all accord with the standardizing programming requirement, the fact that the generated PLC codes are from an unified module library can be ensured, and the fact that the PLC program architecture is standardized is ensured.

Aspects of a method and system for memory attack protection to achieve a secure interface are provided. An integrated memory within a slave device may be configured into a plurality of memory portions or regions by commands from a host device. The memory regions may be utilized during operations associated with authentication of subsequent commands from the host device. A first memory region may enable storage of encrypted host commands and data. A second region may enable storage of decrypted host commands and data. A third region may enable storage of internal variables and/or intermediate results from operations performed by the slave device. Another region may comprise internal registers that enable storage of information only accessible to the slave device. Access to some of the memory regions may be controlled by a bus controller and/or a memory interface integrated within the slave device.

A plant controller controls a plant modeled in a discrete-time system. The controller uses a frequency-shaping response-designating control algorithm having a filtering function to cause a difference between output of the plant and a target value to converge. Thus, the plant is robustly controlled without causing undesired frequency components. When the plant is an engine, the engine is modeled using a ignition timing corrective quantity as input and a rotational speed as output. The controller performs the frequency-shaping response-designating control algorithm to determine the ignition timing corrective quantity. The frequency-shaping response-designating control may be frequency-shaping sliding-mode control. In one embodiment, the control input into the plant may includes a corrective term for stabilizing an internal variable of the filter, a corrective term for stabilizing the difference between the output of the plant and the target value and a corrective term that varies depending on a switching function.

This present invention presents a Common Case Computation (CCC) based design. A computation circuit with reduced power consumption, said computation circuit having a plurality of components. The components include a general purpose circuit, a common case detection circuit and a common case execution circuit. The common case detection circuit detects an occurrence of a common case based on a first subset of primary inputs and a first subset of internal variables for the general purpose circuit, and the common case execution circuit computes a subset of primary outputs of the general purpose circuit based on a second subset of primary inputs for the general purpose circuits and a second subset of internal variables for the general purpose circuit. The first subset of the primary inputs and the first subset of internal variables can be the same as the second subset of primary variables and the second subset of internal variables respectively. The common case computation circuit identifies and exploits common case computations during the design process for reducing power consumption.

The invention discloses a position type active-disturbance-rejection control method with the undisturbed switching function, and belongs to the technical field of industrial automation. The method comprises the steps of judging the non-tracking state of an ADRC, selecting the degree of the ADRC, updating internal variable of the ADRC and the ADRC output respectively through different calculating modes according to the non-tracking state variable value and the degree of the ADRC,, and conducting abutting joint on the corresponding controlled variable and other variables of the system through the selection and judgment of an operator. The designed position type active-disturbance-rejection control method can achieve stable transition of the switching process of ADRC/PID/MAN modes, additional disturbance and impact on the controlled process cannot happen, and the simulation result indicates that the position type active-disturbance-rejection control method has effectiveness implementability in the process control application.

The invention discloses a method for testing concrete uniaxial tensile stress strain relationship through sound emission. The method comprises the following steps: performing three-point bending fracture test on a concrete beam, and monitoring material damage and strain development in the crack development and evolution process in a fracture process area by using a sound emission tester and a strain tester respectively; according to the initial gap length, the critical fracture process area length, the loading total time and the fracture initiation time, determining the time t required by thewhole destruction process of the first critical fracture process area; according to the sound emission characteristic of material damage and evolution within the time t, fitting a relation expressionbetween a material damage factor and fracture process area strain development within the time t and establishing a damage factor expression taking strain as internal variable so as to obtain a concrete uniaxial tensile stress strain relationship model. The method provided by the invention has important application value in developing concrete constitutive theory and test research thereof.

For an effectively working regulation of the combustion process in the HCCI mode, a modeled combustion process, to be described by internal variables of state, is formed by using process-influencing variables. Output variables of the actual and modeled combustion process are then used to regulate the process-influencing variables.

A power transfer unit assembly for a vehicle. The power transfer unit includes a housing, an internal variable speed differential positioned within the housing, a first front side shaft rotatively connected to the differential, a second front side shaft rotatively connected to the differential, an input shaft interconnected to at least one of the first and second side shafts, and at least one shifting mechanism for engaging at least one of the first and second shafts with at least one mode selection gear set. Engagement of the mode selection gear set transfers torque through the input shaft to selectively engage with a second gear set interconnected to a power transfer final drive unit assembly having an internal variable speed differential.

Power management method and system for an unmanned air vehicle, wherein the unmanned air vehicle comprises a plurality of power demanding subsystems and a plurality of power sources. The invention establishes mission oriented fixed parameters. A fuzzy logic power management unit, comprised in the system, automatically calculates and assigns priorities for delivering power to the subsystems. It also automatically calculates and assigns amounts of power delivered to each subsystem and automatically decides which of the power sources to deliver power to which subsystem. The fuzzy logic power management system calculates and assigns the priorities and loads in function of a plurality of internal variables, external variables and the mission oriented fixed parameters.

The invention provides a single-man manual-control rotorcraft which is composed of a rotorcraft body, a rotor shaft cantilever tilt structure, a full-manual-control mechanism and a rotor head mechanism having an internal variable distance function. The rotorcraft body has a high-gravity center normal-three-point undercarriage structure, wherein the main rotorcraft body consists of a vertical column, a front beam, a back beam, an engine bracket and a front support beam. A steering wheel is arranged right ahead and empennages are arranged at the back. A driver seat and an engine are respectively at the front and the back of the vertical column. In the rotorcraft, a push-type propeller provides power and a three-point frame-type individual damping support mechanism having a rotor reactive force balancing device is used for balancing the reactive force generated to the rotorcraft body by air during operation of the rotor, so that the rotorcraft is improved in takeoff and landing stability. By means of the full-manual-control mechanism having a steering linking function, a driver can complete the operations comprising distance change of the rotor, rotor shaft tilt, flying direction turning and braking just like driving a motorbike.

The invention provides an EHz ultrafast modulation pulse scanning laser and a distributed optical fiber sensing system. A doped optical fiber is carved with a plurality of phase shift gratings with different central window wavelengths, and the wavelength interval between adjacent central window wavelengths is a preset fixed value; when pump light emitted by a pump laser source enters the doped optical fiber through the coupling of a wavelength division multiplexer, the phase shift gratings carved on the doped optical fiber can generate multi-wavelength single-mode narrow-linewidth laser with the wavelength interval of the preset fixed value; and then, the ultrafast modulation is finished by a time domain control method based on EOM (Ethernet over coax) to obtain internal variable frequencypulse light formed by continuously splicing a plurality of pulse lights with linearly increasing frequencies, thereby forming the EHz ultrafast modulation of the distributed feedback fiber laser. Therefore, the coherence length of output laser can be increased on the premise that the laser frequency is unchanged, and the problem that the existing distributed optical fiber sensing system is restricted in high spatial resolution, long distance and high frequency band can be effectively solved.

The invention discloses a memory system chaotic signal generator which comprises a memory element circuit and a three-order linear system circuit. The memory element circuit comprises a first integral circuit, a first multiplier disposed at a rear order of the first integral circuit and an eighth gain circuit disposed at a front order of the first integral circuit. An output end of the three-order linear system circuit is connected with an input end of the eighth gain circuit and an input end of the first multiplier. Output of the first integral circuit is fed back to the input end of the first multiplier. The three-order linear system circuit comprises three unit circuits composed of integral circuits, summing circuits disposed at a front order of the integral circuits, rear orders of the integral circuits, and gain circuits located at the front order of the integral circuits. The memory system chaotic signal generator is independent of internal variables inside memory elements, generates novel chaotic attractors with dynamic features mainly related to original system parameters, is a special chaotic system in a memory system mode, and has an impelling action on development of chaotic systems.

The application provides a high-performance distributed optical fiber sensing system based on Hz EHz ultrafast pulse scanning. When performing disturbance signal testing, the internal variable-frequency pulse light emitted by the Hz EHz ultrafast pulse scanning laser enters the sensing optical fiber through a circulator, a backward Rayleigh scattering signal emitted by the sensing optical fiber enters an unbalanced Michelson interferometer through a coupler, the backward Rayleigh scattering lights at the arm length location of two adjacent interference arms are in interference one by one by designing the arm length arm of two interference arms; therefore, the signal received after passing through the unbalanced Michelson interferometer contains a phase difference signal caused by an external disturbance signal on the sensing optical fiber; and finally, a phase demodulation unit is used for demodulating the change of the relative phase difference signal along with the time, and then thedynamic measurement on a disturbance signal in the sensing optical fiber can be realized. And meanwhile, the Hz EHz ultrafast pulse scanning laser can effectively realize the simultaneous monitoringin the long distance, high-frequency band signal and high-space resolution.

The invention relates to a method for synchronizing program sections of a computer program. The program sections can run in parallel on different processors of a computer. Data transfer between the program sections is synchronized by providing a buffer. Unauthorized access to the buffer is prevented by means of a flag that is set automatically by buffer utilities. The data transfer between individual program sections is thus synchronized by the buffer synchronization class only, which consists of the buffer, internal variables and the buffer utilities, is configured in a very simple manner and can thus be tested in operation an in a relatively simple manner by means of a computer comprising several processors. The data transfer is very efficient as the individual utilities are designed in a simple and short manner and thus require little processing time and as the data can be directly written in or read out of the buffer.

The invention belongs to the technical field of environmental protection, and discloses an assessment method of timely intervention and safe withdrawal of ecological restoration in a red soil eroded area of southern China. The assessment method includes establishing a cusp catastrophe model, judging an ecosystem state, determining spatial dislocation of ecological restoration measures, dividing timely intervention and safe withdrawal areas of ecological restoration measures, and proposing an adjustment mode of the ecological restoration measures. The invention adopts a critical internal variable to determine an upper leaf and a lower leaf of the stable ecosystem state, and adopts the environmental change to determine the direction of the catastrophe ecosystem state; and the built catastrophe model can reveal the internal mechanism which cannot be disclosed by the traditional methods. Based on the basic framework of the invention, according to a research region and a research purpose, indexes can be adjusted according to the actual situation, and then the catastrophe model can be used for any other similar region in the red soil eroded areas of the south and can be used as an earlywarning system of the ecological restoration degree and the development trend.

The invention discloses a hydrostatic nut pair with an internal variable throttling function and relates to the field of precision machinery automation equipment. The hydrostatic nut pair with the internal variable throttling function comprises a lead screw and a nut which are mutually matched, wherein a first oil cavity and a second oil cavity are formed in the two sides of each inner thread tooth surface of the nut, and the radial section projections of both the first oil cavity and the second oil cavity are fan trapezoids; through the corresponding first oil cavity and second oil cavity, a hydrostatic oil film of lubricating oil can be formed between the lead screw and each tooth side surface of the nut; a groove used for communicating with the corresponding first oil cavity and the corresponding second oil cavity is formed in each internal thread tooth of the outer circle of the nut; a movable throttling part is mounted in each groove, and comprises a slide valve, a first elastic component and a second elastic component; an oil supply groove communicating with each groove is formed in the outer circle of the nut; an external sleeve is mounted on the outer circle of the nut in a matched manner; and an oil supply hole communicating with the oil supply groove is formed in the external sleeve. By adoption of the hydrostatic nut pair provided by the invention, not only can an oil supply pipeline be simplified, but also the throttling performance can be improved.