278 results about "Realizability" patented technology

The invention belongs to the technical field of GNSS engineering safety, and relates to an anti-interference normal null widening method for a dynamic GNSS receiver. On the basis of a normal-distribution probability model, a null widening model of the dynamic GNSS receiver is provided. The model is linearized on the situation of small angle changing, and frequency spectrum gains formed before and after widening are compared by means of a Matlab simulation tool. By means of a power insertion algorithm, the relationship of an output SNR and an input INR is analyzed before and after widening, and ultimately engineering realizability of an algorithm is put forward through FPGA and DSP platform verification. As is shown by a result, widening null formed through the widening algorithm can effectively counteract interference sources changing within a certain range, the aim of preventing dynamic interferences is achieved and robustness of a self-adaptation algorithm is improved.

The invention discloses a method for controlling hybrid power urban buses. The method comprises the steps of off-line optimizing and on-line controlling. The idea of control strategy switching is put forward, driving reference working conditions targeting regions and more conforming to actual bus driving routes are established, off-line overall optimizing is carried out based on the working conditions, the optimum control effect can be achieved, and the problem that the dynamic planning cannot be applied to on-line and real-time control because the calculated quantity of the dynamic planning is large is solved. When the hybrid buses are driven actually, whether the similarities between the actual driving working conditions and the established driving reference working conditions and between the road prediction working conditions and the established driving reference working conditions are judged on line, if yes, real-time torque distribution is carried out on the hybrid power urban buses by calling dynamic planning optimum control parameters stored in a bus main controller, or otherwise, control strategies are switched, on-line and real-time control is carried out on the buses by adopting the fuzzy logic rule control strategy which is high in self-adaptability and realizability, and accordingly the control strategy adaptation is improved.

The invention provides a smart cleaning robot and a cleaning method. The cleaning method includes: allowing an image acquisition module to perform image acquisition on a cleaning region in the cleaning travelling direction of the smart cleaning robot, and acquiring an image; performing image feature recognition on the acquired image, and extracting a current coordinate of the recognized feature; comparing the current coordinate of the recognized feature and a coordinate of a feature corresponding to a pervious image, and acquiring a position of a pervious and next image feature; and convertinga displacement of the smart cleaning robot according to the coordinate of the pervious and next image feature. Non-contact displacement measurement can be completed through the image features, the displacement and the angle of the cleaning robot can be calibrated, and the accuracy of the cleaning path is improved. The image acquisition module can optimize multiple functions of the cleaning robot;and the system cost is low, and the realizability is high.

The invention discloses an automatic extracting method for characters on a license plate, which is used for processing a license plate image by a combined global and local binarization method, wherein the global binarization processing is carried out for the license plate image by an Ostu method, the characters and background on the license plate can be accurately separated; and each split single character image is processed by the self-adaptive secondary local binarization method, and the integrity of the character details can be ensured. The method has small operand, high realizability and strong adaptability, can adapt to the license plate images under different environments and illumination conditions, and highlighting the character characteristic can improve the identification accuracy rate of the subsequent characters. The method can be used in an automatic identification system of new vehicle license plates based on digital video/image processing, and for realizing the automatic identification of vehicle license plates in the system.

The invention relates to a network connection method, in particular to architecture for trusted network connection of a terminal with TPM function and a computer network, and an access method thereof. The architecture consists of five parts, namely a trusted terminal for tolerating untrusted components, a trusted access gateway, an authentication policy management server, a component information collecting and publishing node MAP and a secure data exchange platform; an embedded trusted system layer additionally arranged in the trusted terminal is an independent and integral system on chip SOC, and is not influenced or controlled by an upper-layer operating system, so that the architecture has better realizability; the trusted access gateway and the trusted terminal adopt bidirectional nonequivalent trusted evaluation; and a data exchange platform is arranged additionally between the trusted terminal and the trusted access gateway, and can only realize data exchange with uniform format and transparent structure at raw data level so as to prevent protocol defect-based attacks; therefore, the invention provides a higher security protection mechanism for protecting the network.

A custom declaration data process system comprises a system input portion which is provided with an input interface, with which a user carries out custom data inputting; a system abutting port which is used for abutting with a client ERP information management system; a data processing portion which is used for uploading call applications; a data transmission portion; and a data storage portion which is used for storing documents operated in the system into a database, and locally downloading and storing document data not declared in the system and custom data declared in a company. The custom declaration data process method comprises the steps of assessing the realizability of channels for transmitting data to the custom and port for calling the data, establishing work flow, constructing a custom affair system framework, and organizing people to write programs. According to the custom declaration data process system and method, the work efficiency can be improved up to 50%; the business process is simplified; import and export enterprise, freight forwarding custom broker custom data is allowed to be abutted and shared; and enterprises are assisted to realize inner management.

The invention discloses a method for identifying internet application based on dynamic deep packet detection and relates to a method for identifying the internet application. in the method, an access control list module (10) and a deep packet detection module (20) are comprised; a dynamic deep packet detection strategy generating module (30) is arranged; the access control list module (10), the deep packet detection module (20) and the dynamic deep packet detection strategy generating module (30) are executed sequentially; the dynamic deep packet detection strategy generating module (30) can obtain the characteristic of the internet application dynamically by characteristic statistics for the internet application; the characteristic generates a deep packet detection strategy; furthermore, the deep packet detection module (20) is used for identifying. The invention has wide identifying range, high accuracy, high processing efficiency, flexible operation, good expansibility and strong realizability and can be used for realizing not only network device function but also network analysis system function.

The invention discloses a passive sensor networking detection multi-target method. A passive sensor networking system carries out intersection positioning by using a direction-finding intersection method according to angle information provided by a sensor; a ghost point is eliminated by using information redundancy static between multiple platforms; subsequently the ghost point is dynamically eliminated by using a virtual flight path tracking technique, so as to realize the accurate positioning and tracking on multiple targets. The method for eliminating the ghost point comprises the steps of: calculating each flight path tracking door; carrying out association processing on point targets (obtained from the intersection positioning) with each grade of flight path files in sequence in accordance with the flight path grades from high grade to low grade; and starting, combining, cutting, branching and deleting the flight path according to the association situation. The passive sensor networking detection multi-target method has the following advantages that target movement characteristics are sufficiently utilized, the ghost point is dynamically eliminated in the target tracking process, the engineering is strong in realizability, and the ghost point can be effectively eliminated under the condition that the targets are dense or measuring noise exists.

The invention discloses a trusted verifying method and equipment used in the running process of a virtual machine. The method comprises the steps that a configuration information collecting module stores the names and hash values of other inner core modules in an operating system inner core of the virtual machine, the name and hash value of an executable program loaded to internal storage and the name and hash value of a script in a configuration information list, and the hash values of the other inner core modules, the hash value of the executable program and the hash value of the script are added to a PCR of a VTPM; when a remote verifying service module receives a trusted evidence verifying request sent by an outer trusted entity, the configuration information list and a PCR value stored in the PCR of the VTPM are obtained and returned to the outer trusted entity, so that after the outer trusted entity confirms that the configuration information list is not modified according to the PCR value, the configuration information list is verified according to a local characteristic database, and whether the virtual machine is trusted or not is determined according to a verifying result. In the trusted verifying method and equipment, the safety and realizability of verifying the credibility of the virtual machine are improved.

The invention discloses a method and a device for virtual network configuration migration. In the invention, a network management device senses a network migration event of a virtual host, and issues a configuration to a migration uplink physical switch migrated by the virtual host, and updates the access restrictions of the migration uplink physical switch on the virtual host; the network management device also can issue a configuration to an outmigration uplink physical switch of the virtual host, and updates the access restrictions of the outmigration uplink physical switch on the virtual host; the physical switches can flexibly control the access of external users on the virtual host through issuing configurations to the physical switches; as additional protocols are not realized during the process, the realizability is good; meanwhile, the realization process is independent from a detailed physical network, and does not need special supports from the physical network; therefore, the compatibility is very good.

The invention discloses a FEC-based selective retransmission system and a retransmission method thereof, belonging to the technical field of network communication and relating to selective retransmission method of FEC. The FEC-based selective retransmission system and the retransmitting method thereof aim mainly at solving disadvantages of existing retransmission method, such as large retransmission data size and blindness. The system consists of a packing device, an FEC encoder, an FEC decoder, an unpacking device, a retransmission grouping decoder, a retransmission grouping judger and a buffer area. If the FEC decoder fails to decode, the retransmission grouping judger picks out serial numbers of data packet needed to be retransmitted and the serial numbers are transmitted to the packing device; the packing device packs up the received data and transmits the data to the FEC encoder; the FEC encoder transmits the encoded data to the FEC decoder by a forward channel; the FEC decoder transmits decoded data to the unpacking device; the unpacking device transmits the unpacked data to the retransmission grouping decoder; and the retransmission grouping decoder transmits the resumed data to the buffer area. The invention has the advantages of low complexity and high realizability, and is applicable to real-time multimedia transmission and other data transmission.

The invention discloses a rate matching method in an LTE (Long Term Evolution) downlink system, wherein specific to a 3GPP (The 3rd Generation Partnership Project) LTE downlink system, a transmission channel model based on Turbo codes is proposed, and circulatory filling and interlaced punching are adopted in the rate matching method in the LTE downlink system. In the invention, the rate matchingmethod comprises the steps of: firstly, performing bit collection by adopting a system-verification information bit stream interlaced combination method, and then adding or removing a corresponding number of bits to obtain corresponding code rate by adopting a circulatory filling or interlaced punching method specific to the collected bit stream, thereby realizing rate matching. Experimental tests show that compared with the traditional LET rate matching method, the rate matching method disclosed by the invention can be used for effectively increasing a false bit error rate (BER) performance.In addition, the rate matching method in the LET downlink system has the advantages that the positioning and deleting of dummy bits are omitted, the computational complexity is lowered, and the realizability of an algorithm on software and hardware is increased.

The invention discloses a method for measuring navigation satellite attitude, which comprises the following steps: observing a carrier phase of a satellite signal, geodetic latitude and longitude of an observation point and a navigation message by a receiver; analyzing a carrier phase phi and an elevation angle alpha and an azimuth angle omega of a satellite according to the geodetic latitude and longitude of the observation point and the navigation message; searching a baseline attitude angle phi and a baseline attitude angle beta by using an ant colony algorithm; calculating a baseline vector b; and back-calculating a double-difference integer ambiguity matrix N. The method for measuring the navigation satellite attitude has the following advantages: 1, small amount of calculation: the adoption of the ant colony algorithm for solving an initial attitude angle directly overcomes calculation barriers in resolving an integer ambiguity initially by a conventional method and has fast searching; 2, flexible algorithm: specific parameters of the ant colony algorithm can be selected according to different applications to obtain the maximum performance; and 3, good realizability: the ant colony algorithm is a commonly used algorithm for solving the problem of nonlinear combined optimization and has a plurality of references and good realizability.

The invention provides an active disturbance rejection control method for cluster spacecraft electromagnetic traction, complexity of a cluster spacecraft system and model uncertainty are fully considered, an electromagnetic force/torque model and a relative motion dynamics equation are established, so that the active disturbance rejection control method formed by a most speed tracking differentiator, a non-linear extension observer and a non-linear feedback control law has good working performance, a coupled problem of a dynamic model is effectively solved, high precise electromagnetic traction control can be realized, and the effectiveness and the Lyapunov asymptotic stability of the method are verified; compared with the control performance of a finite time control method, the control method has better rapidity, vibration resistance ability and disturbance rejection, and the control method is simple in design and has engineering realizability.

The invention discloses an OOFDM (Optical Orthogonal Frequency Division Multiplexing) encryption system based on chaos sequence pilot frequency mapping; the OOFDM encryption system comprises an OFDM (Orthogonal Frequency Division Multiplexing) encryption module, an optical modulation module, an optical fiber transmission channel, a photoelectric detection module and an OFDM decryption module, wherein the OFDM encryption module, the optical modulation module, the optical fiber transmission channel, the photoelectric detection module and the OFDM decryption module are successively connected; the OFDM encryption module is connected to the optical modulation module, thereby generating an encrypted OOFDM signal; the encrypted OOFDM signal is connected to the optical fiber transmission channel, realizing the transmission of the encrypted OOFDM signal in optical fibers; the optical fiber transmission channel transmits the encrypted OOFDM signal to the photoelectric detection module, thereby converting the encrypted OOFDM signal into an electrical OFDM signal; and the electrical OFDM signal reaches to the OFDM decryption module, finishing the demodulation of the OFDM signal. The OOFDM encryption system disclosed by the invention can be adaptive to transmission characteristics of high speed and large capacity of an optical frequency division multiplexing transmission system, the safety is high and the time-space cost is low; under the condition of not occupying and not changing the original signal distribution, the system encryption can be realized, and the realizability is high.

The invention belongs to the technical field of automatic control, in particular to a multifunctional intelligent vehicle start and safety protection system. The system comprises a central processor, wherein the input end of the central processor is connected with a drunk driving prevention module, a fatigue driving prevention module and a severe weather navigation module, while the output end is connected with a voice prompt module, a liquid crystal display module and a start control module, and the start control module is connected with a vehicle engine start system; the drunk driving prevention module comprises a pressure sensor and an alcohol detection sensor which are connected to a CPU (Central Processing Unit) through a signal amplifier and an analog to digital converter; the fatigue driving prevention module comprises a timer, and the timer is started along with the start of the vehicle through the CPU; the severe weather navigation module comprises an ultrasonic distance measuring module; and the ultrasonic distance measuring module and a vehicle speed information output end are together connected to the CPU. The invention can effectively and originally suppress traffic accidents and has the advantages of good compatibility and strong realizability.

The invention discloses a method for designing a novel mesh antenna structure with a shaped pattern. The method comprises the steps of conducting shape design on a reflective surface of an antenna cable net firstly; then designing the cable net structures of an upper layer and a lower layer according to the shaped meshed reflective surface, so that an overall three-layer cable net structure is obtained; conducting pretension balancing design on the three-layer cable net structure so as to guarantee the tensile property and realizability of the structure; designing a three-layer truss structure supporting the three-layer cable net finally, so that a cable net-truss overall antenna structure is obtained. By extending a two-layer cable net structure of a peripheral truss type extendable mesh antenna into the three-layer cable net structure, the mesh antenna structure with the shaped reflective surface is obtained, and the design process is simple; the designed shaped mesh antenna structure is tensile, easy to realize and high in engineering application value.

The invention discloses a multi-missile cooperative engagement guidance method based on a model predictive control technique. Through the adoption of the multi-missile cooperative engagement guidance method, the cooperative engagement problem of missiles is converted into a theoretical trajectory tracking problem on the premise of considering the variable missile speed; the estimation of the residual flight time is avoided; the accuracy and the realizability are improved; meanwhile, the model prediction control technique is adopted, so that an ideal trajectory can be quickly and accurately tracked in the presence of external interference and angle attack and amplitude limit.