199results about How to "Good achievability" patented technology

A method for establishing a multi-carrier HSDPA channel and method for transmitting multi-carrier downlink packet data are provided. The method for establishing a multi-carrier HSDPA channel includes: A. determining number of HSDPA channel resources of a cell; B. selecting N carriers in the cell according to the number of channel resources determined in step A, wherein the N carriers form the HSDPA channel resources; C. allocating the HSDPA channel resources to be HS-DSCHs, uplink and downlink control channels; D. allocating, by a network, an HS-DSCH to be used by a user terminal, one or more HS-SCCHs and one or more mate HS-SICHs to be monitored by the user terminal, when the user terminal initiates an HSDPA request and the request is allowed. The method may be applied to multi-carrier downlink packet data transmission, to enhance peak transmission rate of user packets, optimize the resources, thereby improving system throughput.

The invention claims an auxiliary driving system for achromate or tritanope based on image identification technology. The auxiliary driving system for achromate or tritanope comprises a control system, an image acquisition device, an image identification module, an image processing module and a warning output device. The driving assist system for achromate or tritanope comprises the following working steps of: step 1 of image acquisition for acquiring the image in front of a vehicle and transmitting the image to the image identification module; step 2 of image identification for analyzing the image, identifying an existing traffic light signal and / or a warning mark according to the factors of colors, shapes and similarities in different regions, and marking the identified traffic light signal and / or warning mark; step 3 of processing image for processing the image to the marked mark and replacing the colors into the colours capable of being identified by achromate or tritanope; step 4 of warning for displaying the warning to the driver with colour blindness or colour weakness by an image display device or a voice output device. By adopting the invention, the traffic signal lamp and the warning mark are effectively displayed to the driver with colour blindness or colour weakness.

The invention discloses a soft landing relay obstacle avoiding method which is used for completing soft landing of a celestial body through two matched stages, namely a rough obstacle avoiding stage and a fine obstacle avoiding stage, wherein in the rough obstacle avoiding stage, a visible-light camera is used for carrying out rough detection on a larger range and larger obstacles to remove largeobstacles which directly threaten landing safety; and then the surface of the celestial body is subjected to accurate three-dimensional obstacle detection by utilizing laser scanning in a safe area selected in the rough obstacle avoiding stage so as to obtain and remove obstacles with smaller dimensions and ensure landing safety to the maximum extent. The soft landing relay obstacle avoiding method disclosed by the invention has good autonomy and high reliability, can be used for soft landing detection of the celestial body with more complicated terrain, and is especially applicable to soft landing of deep-space unmanned celestial bodies in a longer distance; the soft landing relay obstacle avoiding method greatly improves the obstacle avoiding capacity and lengthens the obstacle avoidingdistance, and improves the landing safety; and the soft landing relay obstacle avoiding method reduces the technical index requirement on sensors, reduces the difficulty in research of visible-light / laser imaging sensors, and is beneficial to engineering application.

The invention discloses a depth packet detection platform based on an industrial SCADA system. The detection platform can be used for detecting the system state by means of Modbus / Tcp and IEC 60870-5-104 protocol which are commonly used in a power system. The detection platform includes four parts: an industrial SCADA system simulation platform, a depth packet analysis module, an abnormity detection module and an intrusion module. Based on the typical interactive mode of periodic polling in SCADA system, the detection platform simulates the normal network data flow in power system, and simulates the abnormal state of the system and the corresponding network data flow by protocol vulnerability analysis and message variation. Feature analysis and extraction of the message field information,through the machine learning method to build a system state model, to achieve the integrity of the system state, in-depth detection.

The invention relates to a layer-based clustering routing protocol method applied to a three-dimensional underwater acoustic sensor network. Under the conditions of a known monitoring range and a node maximum transmission distance, optimal layer number guaranteeing the network connection and optimal cluster head number under the condition that the layer number is given are determined; in the stage of selection of the cluster head, the position of a node participating in cluster head selection is limited, and the node participating in the selection decides whether to be a cluster head according to a competitive factor; in the stage of formation of an inter-cluster routing, the cluster head selects a cluster head node which is one layer higher and is closest to self as a relay node; in a stable data transmission stage, member nodes transmit the information to corresponding cluster heads, the cluster heads compress the received information and then send the compressed information to the relay node or a base station. The method can effectively balance the energy consumption of the network nodes and save the total energy consumed in the network.

The invention discloses an underwater acoustic measurement method for scattering properties of a ship target broadband radar, which is characterized by comprising the following steps of: firstly, inversely arranging a scaled model of a measured ship target in an anechoic tank, regulating basic conditions of a measurement device and a modeling test, simulating irregular sea waves at an interface between the scaled model of the ship target and water, amplifying a linear frequency demodulation signal generated by a signal source and radiating the amplified frequency demodulation signal in a sonic signal manner, amplifying and filtering an echo output signal reflected by the scaled model and then storing, then acquiring a plurality of groups of echo signal data on each rotating angle and then storing; and finally, processing the echo signals of the scaled model of the measured ship target on different rotating angles by adopting a pulse compression technology to obtain one-dimensional distance image data of the measured ship target. The invention overcomes the defects of rigorous requirements on measurement equipment and environment and incapability of measuring sea-surface target characteristics in the prior art, and has the advantages of flexibility in the measurement method, low cost, easiness in realization and the like.

The invention discloses a multi-dimensional multiplexing soliton optical fiber laser device which comprises a laser pump source and an annular laser resonant cavity consisting of a gain medium, a dispersive medium, a wavelength division multiplexer, an optical coupler, an optical circulator, a polarization controller and a polarizer. The laser pump source and the gain medium work together so as toprovide a gain amplification mechanism for laser device operation. The dispersive medium can be used for chromatic dispersion compensation of pulse laser so as to achieve chromatic dispersion management of an internal optical path of the laser device, and the optical circulator is a non-reciprocal optical transmission device for coupling the chromatic dispersion medium to construct a bidirectional transmission optical path structure. Via use of the polarization controller, a local polarization state of the internal optical path of the laser device can be changed, and mode-locking operation ofthe pulse laser and adjustment and switching of a mode-locking state can be realized. The multi-dimensional multiplexing soliton optical fiber laser device of the invention can be used for bidirectional transmission, and mode-locking laser pulses can be respectively obtained, generation of polymorphic soliton pulses can be supported, and a wideband wavelengths tuning function and a multiple wavelength switching function can be fulfilled via output laser pulses.

The invention discloses an online-sequential extreme learning machine-based satellite signal cycle slip detection and restoration method, which is characterized in that the method is implemented by the following steps of performing high-order differentiation processing on the carrier phase of a satellite signal, forming a cycle slip-free training sample set by utilizing cycle slip-free carrier phase values, training an initial online-sequential extreme learning machine model, constructing cycle slip detection statistic by utilizing a model predicted value, detecting and restoring cycle slips, and updating the online-sequential extreme learning machine model by using the cycle slip-free carrier phase values. According to the online-sequential extreme learning machine-based satellite signal cycle slip detection and restoration method, small cycle slips (of three cycles and more) can be effectively detected without additional auxiliary information, and the method is applied to a single-frequency receiver, can be widely applied to the processing of GPS (global positioning system), GLONASS (global navigation satellite system), Galileo and Beidou navigation satellite signals, and has broad application prospect.

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 a pilot frequency distribution method. The method can be used for effectively solving the problem of serious pilot frequency pollution between adjacent cell users in a large-scale MIMO system in actual network architecture and a transmission environment. The method comprises the following steps: a step 1, generating a network level base sequence; a step 2, generating a cell level base sequence; a step 3, generating a user level base sequence; a step 4, calculating statistical mutual correlation values between user pilot frequency sequences and the pilot frequency sequences of the adjacent cell; a step 5, sequencing and grouping the user pilot frequency sequences in each cell according to the statistical mutual correlation values; a step 6, determining a pilot frequency group to which a user belongs; a step 7, allocating the user pilot frequency; a step 8, updating channel estimation; and a step 9, updating the user pilot frequency. The method can be used for effectively reducing the serious pilot frequency pollution between adjacent cell users resulting from a limited number of orthogonal pilot sequences in the MIMO system, and improving the actual performance of the MIMO technology; and the method is simple to implement, relatively low in computational complexity and is relatively good in realizability.

The invention discloses an industrial SCADA (Supervisory Control and Data Acquisition) system simulation platform. The platform can realize Modbus / TCP, IEC 60870-5-104 and BACnet / IP protocols in an industrial SCADA system. The platform is divided into four parts which are simulation module used for simulating a virtual controlled object, a PLC honeypot, an SCADA server and a protocol communicationmodule. The platform specifically simulates an industrial SCADA system network data flow including various typical industrial control protocols, adopts a construction mode based on the PLC honeypot,simulates a network data flow with large-scale nodes, multiple protocols and special interactive mode in the real industrial control system environment through realizing response behaviors of a PLC for the SCADA server and control functions for the controlled object, and realizes a complete communication process of data among a process monitoring layer, a field control layer and the controlled object in the industrial SCADA system. The industrial SCADA system simulation platform performs packaging on the PLC honeypot by using the flexibility of the simulation module for serving as the virtualcontrolled object and combining the light weight of a docker environment, thereby enabling the platform to be transplantable and expandable.

The invention provides a real-time monitoring system and method of CO2 discharging amount of a blast furnace and belongs to the technical field of online monitoring of blast furnace iron-making. The system comprises monitoring display equipment, a data service center, a component analyzing and checking mechanism terminal, a data collecting device and a field data collecting instrument. The field data collecting instrument is connected with the field data collecting device through an analogue signal wire or a digital signal wire; the data collecting device and the analyzing and checking mechanism terminal are connected with the data service center through Ethernet; meanwhile, the data service center is connected with the monitoring display equipment through the Ethernet; the field data collecting device can obtain information of a field material flow to be detected in real time; the component analyzing and checking mechanism terminal can supply sampled component detection data of inputand output carbon-containing substances in real time; the data service center can obtain all monitoring data in real time; and the monitoring display equipment calculates, outputs and displays the real-time carbon dioxide discharging amount of a blast furnace system. The real-time monitoring system and method have the advantages of being strong in feasibility, good in practical applicability and accurate in monitoring result.

Disclosed is a distributed routing protocol method for three-dimensional underwater acoustic sensor networks. Supposing that each node knows its own geographic location and channels are bidirectional and symmetrical, transponding cost is calculated and transponding nodes are selected according to factors such as the node location, utilization rate of the channel, energy, and the like when data transponding is required. Node energy is used as effectively as possible on the premise that other network performances are not affected, and balanced use of the energy of each node and the utilization rate of the underwater acoustic channel are considered. The purpose is to use the channel effectively so as to minimize energy consumption, improve the utilization rate of the energy and the channel of the networks, and prolong the service life of the whole networks.

The invention provides a method for realizing water sound sensor network MAC (Media Access Control) protocol based on ALOHA and TDMA (Time Division Multiple Access). Based on the traditional TDMA mechanism, in the method, time is divided according to time slot, a semi-duplex communication model is adopted, and long propagation time-delay characteristics of water sound communication and space reusability of a channel, and the ALOHA mechanism competition time slot are adopted under the condition of not affecting main node transmission data and unsuccessfully handshaking with the main nodes and not receiving other nodes of the CTS (Clear To send)frame, and receiving data during the process of confirming outstanding messages and data transmission failure delay transmission process are increased so as to realize communication between one node and a plurality of nodes, network throughput is improved and network end-to-end delay is reduced. The method provided by the invention is suitable for the water sound sensor network and other long propagation time-delay communication networks, is easy to implement and high in actual application value.

The invention discloses a GPS-based transmission conductor waving monitoring system and a monitoring method. The system comprises a satellite signal receiving module, a satellite signal analyzing module, a digital signal processing module, a keyboard, a liquid crystal display module, a GSM wireless communication module and a power supply management module. In the monitoring system of the invention, two GPS antennae are fixed in an insulator chain or hung under a sample lead, and other parts of the system are all fixed on an iron tower head of a transmission circuit, which do not affect the lead waving module. The method of the invention has the advantages of high realizing property, excellent dynamic property, high technical level and capability of working in all day.

The invention relates to a method for carrying out information exchange by fully utilizing a near zone induction field of low-frequency electromagnetic wave in a non-stop car charging system. The system of the invention realizes that a car mounted mobile terminal 2 is arranged under a chassis of an automobile 1; a fixed terminal of a charging site is arranged above a carriageway surface 7; the mobile terminal and the fixed terminal mutually carry out the information transfer by the method of transmitting with a low-frequency magnetic field and receiving with inductance coupling in the near zone induction field of low-frequency electromagnetic wave; the fixed terminal 4 transmits the low-frequency magnetic field 3 by a transmitter coil 5 and the mobile terminal 2 receives the low-frequency magnetic field by a receiving coil 6; the transmission of the low-frequency magnetic field in the mobile terminal 2 and the receiving of the low-frequency magnetic field in the fixed terminal are completed respectively by inside corresponding inductance coils. The information exchange between the fixed terminal and the mobile terminal is carried out by a half duplex mechanism of the fixed terminal call and mobile terminal response. The design method provided by the invention achieves the purposes of high communication reliability, excellent information security and outstanding economical efficiency.

The invention, which relates to the communication technology field, more particularly discloses a double-frequency broadband ripple horn feed antenna that comprises an input circular waveguide, a variable module section, and a radiant section. The input circular waveguide is connected to the variable module section that is connected to the radiant section. Besides, the antenna is characterized in that: the input circular waveguide is an over mode transmission waveguide; the variable module section and the radiant section are in a circular waveguide ripple structure; the variable module section is formed by a plurality of single groove deep transfer period ripple structures and the inner wall is in a gradually expanded horn shape; calibers of all the ripple structures are different; and the radiant section is formed by a plurality of periodical ripple structures, wherein calibers of periodical ripple structures are gradually expanded in a linear mode; and a gradually expanded angle of the inner wall of the radiant section is greater than that of the variable module section. According to the invention, the antenna has a simple and compact structure; and antenna technical indexes including equalization of dual-band E surface and H surface directional diagrams, a dual-band edge illumination level, broadband multi-mode transmission, and dual-band phase center sharing and the like are realized; besides, the antenna has advantages of compact structure, small volume, light weight, low cost, easy processing, high efficiency and good environmental adaptability and the like.

The invention provides an airborne terminal compatible with dual-system satellite communication link work. The airborne terminal comprises a down-conversion channel module, an up-conversion channel module, a frequency synthesizer module and a signal processing module, wherein the down-conversion channel module converts a received inter-satellite link forward remote control signal of a Beidou second generation satellite into an intermediate frequency signal and sends the same to the signal processing module, and the signal processing module captures and demodulates the intermediate frequency signal and outputs remote control information; airborne telemeasuring data are encoded and modulated by the signal processing module and are sent to the up-conversion channel module to be converted into a radio frequency signal sent to the Beidou second generation satellite, and meanwhile, the signal processing module receives a switching instruction signal input by an airborne platform, generates a control signal of the frequency synthesizer module through built-in dynamic loading working software, controls the frequency synthesizer module to output a local oscillation signal corresponding to the frequency of an inter-satellite KSA link of a relay satellite system and switches the inter-satellite link working mode of the Beidou second generation satellite to the inter-satellite link of the relay satellite system.

The invention relates to a turbine disk cavity sealing structure with bypass bleed air. The turbine disk cavity sealing structure with bypass bleed air comprises an inner support ring assembly and a front baffle assembly, wherein a bypass bleed air groove is formed in the inner support ring assembly, the bypass bleed air groove is a second flow path of a third path of cold air, and the cold air passing through the second flow path is mixed with the cold air of a first flow path at an inlet of a main flow path; the airflow speed and the pre-rotation angle of the sealed cold air outlet are increased, so that speed triangle difference with the main flow gas of a guide vane root outlet is reduced, the mixing of the sealed cold air and the main flow is reduced, the efficiency of the turbine isimproved, and a movable vane root is guaranteed to work in a design working condition.

The present invention discloses a quality estimation method of a parametric image based on nonlinear structural similarity deviation. Firstly the RGB color image spaces of a reference image and a degraded image are converted into a Gauss image space and a grayscale image space, then a local edge intensity spectrum and a local gradient spectrum are generated and are subjected to nonlinear normalization, the corresponding local edge similarity map and the corresponding local gradient similarity map are calculated, and finally through analyzing the structural characteristic of the local similarity map, a value with a small similarity deviation is adaptively selected to be the quality estimation value of the degraded image. According to the method, the quality estimation effect of different fuzzy, JPEG, noise and other natural images is good, the calculation is convenient and efficient, and the realizability is good.

The invention discloses an image enhancement method based on non-linear guiding filtering, and belongs to the technical field of image processing. Through establishing a local non-linear guiding filtering model, a corresponding guiding filtering coefficient is solved. In order to further improve efficiency and reduce time complexity, non-linear guiding filtering is performed after subsampling of an image, and then the size of the image is recovered to size of an original image through a bilinear interpolation method. The method can be applied in various different computer vision fields, such as image smoothing, image detail enhancement, HDR image compression, and fog elimination and balancing and other operation, and meanwhile an algorithm is simple and efficient in calculation, and good in realization.

The invention relates to a method for realizing a high-download rate photonic crystal demultiplexer with a reflection micro-cavity employing an implantation technology. In the method, a device structure for introducing the reflection micro-cavity and a microfluid implantation technology into a two-dimensional photonic crystal demultiplexer is designed, and a higher download rate is acquired by increasing the reflection micro-cavity at a specific position on the rear side of a download micro-cavity along a main waveguide direction; and microfluid with different refractive indexes is implanted into an air hole of a resonant cavity at different positions of the demultiplexer, so that a guide die of a photonic crystal is changed, a transmission peak shifts, and multi-channel wavelength demultiplexing is realized. The photonic crystal having a medium background air hole structure in a triangular lattice is utilized, and the method is closer to a silicon-on-insulator (SOI)-based photonic crystal manufacturing technology which is widely applied at present, and is high in realizability. The three channels have the transmissivity of over 95 percent, and good application of the method in photon integration and wavelength division multiplexing (WDM) can be acquired.

The invention discloses a distributed sensor fiber as well as a preparation device and method thereof. The distributed sensor optical fiber comprises an outer layer which is an ultraviolet transparent coating layer (1) and an inner layer which is an optical fiber core, wherein a plurality of weak Bragg reflection period structures (2) which have identical physical structures and identical optical properties are continuously distributed on the optical fiber core at an interval of a section of delay optical fiber (4). When the optical fiber provided by the invention is used as a distributed sensing detection carrier, the sensing measurement range can be efficiently widened, and the sensing distance and concentration can be increased.

The invention discloses a turbine disc cavity sealing structure with prewhirl air entraining. An inner supporting ring 1 is provided with a plurality of prewhirl air-entraining flow paths, the prewhirl air-entraining flow paths are formed by air entraining holes 2, air collecting cavities 3 and air outlet holes 4 in sequence, wherein the air entraining holes 2 are a plurality of round holes whichare evenly arranged in the circumferential direction, the air entraining holes 2 are arranged on the end surface of an outer ring of air inlet holes of the inner supporting ring, the air collecting cavities 3 are of a hollow cavity structure, and the range of angles formed between the air outlet holes 4 and a center line of a motor is 65 to 80 degree. According to the turbine disc cavity sealing structure with prewhirl air entraining, a rotary blade root part works in design conditions, the secondary flow loss of a rotary blade passage is decreased greatly, compared with the existing disc cavity sealing structure, the efficiency of the turbine can be increased by nearly 1% after adopting the turbine disc cavity sealing structure with prewhirl air entraining, and the turbine disc cavity sealing structure with prewhirl air entraining is simple in structure, can mostly borrow the existing disc cavity sealing structure, and is good in economy and realizability.

The invention discloses a Beidou navigation satellite attitude measurement-based electric iron tower deformation monitoring system. The system is characterized by comprising a Beidou satellite signal receiving module, a Beidou satellite signal resolution module, a calculation processing module, a 3 / 4G wireless communication module and a power supply module. A Beidou navigation satellite attitude measurement-based electric iron tower deformation monitoring method is characterized by comprising the following steps: firstly, receiving and resolving a real-time radio frequency carrier signal of a Beidou navigation satellite; then, establishing an attitude angle mathematic model of a base line L on the iron tower; and finally solving the attitude angle mathematic model by utilizing an approximate gradient approximation algorithm to obtain the attitude angle of the base line L. The attitude angle mathematic model with multiple constraint conditions can be solved by introducing the approximate gradient approximation algorithm, has strong algorithm realizability and high attitude angle accuracy for measurement place, and has a wide application prospect.

The invention provides a method for producing bandwidth tunable slow light in a polymer filling photonic crystal slot waveguide. According to the method for producing the bandwidth tunable slow light in the polymer filling photonic crystal slot waveguide, the characteristics of slow light in the photonic crystal slot waveguide are optimized through the adjustment of the positions of air holes in two sides of an air slot, when a group refractive index is 55, the wavelength range, namely the bandwidth, of a smooth slow light area can reach 9.0nm, when the group refractive index is 100, the wavelength range, namely the bandwidth, of the smooth slow light area can reach 3.5nm, when the group refractive index is 172.5, the wavelength range, namely the bandwidth, of the smooth slow light area can reach 1.1nm, when the group refractive index is 222, the wavelength range, namely the bandwidth, of the smooth slow light area can reach 0.8nm, and for example, when 0V driving voltage, or 2V driving voltage, or 4V driving voltage, or 6V driving voltage, or 8V driving voltage, or 10V driving voltage is applied to slow light with the group refractive index of 100 and the bandwidth of 3.5nm respectively, the central operating wavelength of the slow light is 1562nm, 1560.5nm, 1559nm, 1557.5nm, 1556nm, and 1554.5nm respectively. Meanwhile, when the group refractive index is between 90 and 110, the bandwidth of the slow light is increased to 111nm, and the bandwidth tunable slow light is achieved.

The invention provides a photonic crystal groove waveguide structure capable of generating slow light of a broadband. According to the photonic crystal groove waveguide structure, a photonic crystal structure is a triangular lattice structure with the lattice constant being a and the air hole radius being r; and a middle row of air holes are removed to form photonic crystal waveguide with a W1 structure, and air grooves with width w of 0.3a is placed at a defect centre, thereby forming a photonic crystal waveguide groove. According to the photonic crystal groove waveguide structure, the lattice constant in the waveguide direction is increased to 1.06a, thus forming photonic crystal groove waveguide with an italic structure; and a first row of air holes close to the air grooves are moved by 0.05a in the direction far from the air grooves, and a second row of air holes close to the air grooves are moved by 0.13a in the direction far from the air grooves. As a simulating result shown, the broadband with the slow light reaches 2.85nm under group velocity c / 100 by virtue of the photonic crystal groove waveguide structure provided by the invention.

The invention relates to an analytical method for product software testability demand characterized by the following steps. 1. Listing all the development demand of product software characteristic. 2. For each piece of development demand, analyzing product software characteristic from two control points or at least one observation point, and listing the contents of these control points and observation points. When test requirements are put forward consideration should be given to how these requirements can be met so as to facilitate the execution of measurement and correct positioning. This analytical method can be used in the functional property or structure of product software for the presentation of a feasible testability requirement, thus facilitating both the late-stage test development and execution of the product software, and the segregation and positioning of the problems.