64results about How to "No increase in complexity" patented technology

The method comprises: 1) encode step, providing the image data, and selecting area for inputting the digital image; making priority classification for the inputted digital image, and making quantization operation for the transformed image data, and recording the priority data; 2) decode step, decoding the location information and priority information of different areas; calculating the quantization value of each area, and using the quantization value to make inverse quantization operation for the data in each area. The structure of the apparatus thereof is: setting a area selection, priority division and quantization unit in the decode device. The decode device comprises an area information decoding and inversely-quantizing unit.

The system is composed of module of wireless communication network for fire fighting, wireless fire fighting gateway, and fire fighting controller. Including detector for fire fighting, relevant link gear, wireless communication module and wireless repeater for fire fighting, the said module of wireless communication network for fire fighting is in use for implementing collection and networked transmission for data of fire information. Connected to the fire fighting controller through cable, the gateway is connected to wireless communication network for fire fighting through a wireless communication module. Collecting data through wireless sensor network, the gateway receives polling and querying from controller. Receiving wireless fire fighting signal corrected by the gateway, the fire fighting controller outputs relevant processed signal based on different types of signal. Features are: adaptability, easy of installation, and low cost.

This invention provides an adaptive handwriting recognition system and method. The adaptive handwriting recognition system comprises: handwrite character input module, allowing users to input characters, and create eigenvector corresponding with the characters; universal character characteristic template library, used to store character collection obtained through samples training beforehand and their counterparts the characteristics template; user character characteristic template library, for storing users handwriting characteristics template; input character recognition module, based on the above eigenvector and universal character characteristic template in universal character characteristic template library, identify the input characters, update user character characteristic template library according to recognition results. Therefore, according to the system and method by this invention, not only can improve the accuracy of handwriting recognition, but also can adapt to different users handwriting characteristics.

The invention provides a method for protecting account security based on an asynchronous dynamic password technology. The method is characterized by including the steps that a user and a service provider agree on the encryption mode of challenge codes and the calculation formula of dynamic codes; after a log-in request of the user is verified successfully, an authentication server generates the challenge code A, the challenge code B and the dynamic code C, the challenge code A is encrypted to obtain the challenge code B, and the challenge code A is calculated through the calculation formula to obtain the dynamic code C; the authentication server sends a feedback message containing the challenge code B to a mobile phone of the user; the user decrypts the challenge code B according to the encryption mode and then substitutes the decrypted challenge code B into the calculation formula to obtain the dynamic code D; the user inputs the dynamic code D and an account name in the log-in interface on the client side to log in. A system is high in reliability, the secrecy degree for transmitting the challenge codes and other information is high, leakage of code information of the user can be effectively avoided, and moreover user operation is safe and reliable.

The invention is a method of using guide frequency character sequence to reduce peak average ratio in orthogonal frequency division multiplex (OFDM) system, including the steps: changing the polarity and power of original guide frequency in OFDM character sequence to obtain a group of all possible sequences; making Fourier transform on each sequence in the group; making Fourier transform on coded and interlaced data sequences and adding the calculation result to each sequence in a group of sequences obtained after guide frequency transform so as to obtain the other group of sequences; calculating the peak average ratio of each sequence in the new group, selecting out a sequence corresponding to the minimum peak average ratio to act as an emission sequence. By changing the polarity and emission power of guide frequency sequence in the OFDM system, it adopts low complexity, high efficiency algorithm and reduces the peak average ratio of the OFDM system on the premise of not needing to transmit added information and not increasing the complexity of receiver.

The invention provides a parallel interpolation bit synchronization system in all-digital demodulation and a synchronized method thereof. The method comprises the following steps: (1) delaying two paths of input parallel sampling data K1 and K2 respectively for three clock cycles, and obtaining K1_d1, K1_d2, K1_d3 and K2_d1, K2_d2 and K2_d3; (2) respectively carrying out interpolation processing to the above sampling data and uk; (3) delaying indicating effective signals to the time when the above interpolation processing obtains results, carrying out extraction to the interpolation processing results in the step (2) according to the indicating effective signals, obtaining maximum points of symbols and traversing points of symbols and outputting the maximum points of the symbols; (4) calculating timing errors according to the maximum points of symbols and traversing points of symbols obtained in the step (3), carrying out noise filtration on the timing errors and obtaining NCO control signals after adjusting amplitude processing; and (5) determining the interval uk of the indicating effective signals and the maximum points of symbols with the former sampling point, entering next clock cycle and starting execution from the step (1).

The invention discloses a real-time color image filtering method based on nonlocal domain transformation. The method comprises the following steps: using a two-dimensional color image as a two-dimensional manifold on a five-dimensional vector space, and defining distance-weighted keeping transformation to obtain a multi-channel weighted isometric function; using recursive filtering to realize one-dimensional nonlocal domain transformation filtering of linear time; conducting separated one-dimensional nonlocal domain transformation filtering to the two-dimensional color image. The nonlocal domain transformation method can effectively involve nonlocal information into an image filtering algorithm. Under the premise that a small amount of computation is added, a high-quality filtering image is effectively obtained, and meanwhile the two aspects of requirements that the edge information in the image is not fuzzy are taken into account. A single color (or gray) image is adopted as an input source, the algorithm complexity is lower, the filtering effect is good, and a variety of computer vision application requirements can be met. The method is especially suitable for image detail enhancement, picture stylizing, image colorizing and pencil drawing conversion.

The invention discloses a method for solving a large-scale linear equation set through cloud outsourcing, and relates to a non-interactive cloud outsourcing calculation scheme based on elementary transformation matrixes. The elementary transformation matrixes have relatively low calculation complexities, and products of the elementary transformation matrixes only consume time complexities being O(n). An ordinary n-order matrix can be encrypted with only n elementary transformation matrixes, so that elements in the matrixes can be encrypted. A solution of the large-scale linear equation set can be written as phi:Ax=b, wherein A is a reversible matrix being nxn, and x and b are vectors being nx1. In a protocol of solving the large-scale linear equation set through outsourcing, the privacies of parameters A and b and the result x need to be protected. The parameters A, x and b are encrypted through the elementary transformation matrixes, so that the problem handling complexity of a client is lowered; the protocol in which the client only needs an O(n<2>) complexity is designed; and the calculation efficiency is increased. Meanwhile, the non-interactive protocol is provided, so that the client does not need to interact with a server at a solving stage, and an outsourcing calculation result can be obtained by submission of a calculation request.

The invention discloses a feedback-free optimized code rate distributed video encoding and decoding method and a feedback-free code rate optimization distributed video encoding and decoding system. The method comprises the following steps of: 1, dividing a video sequence into a key frame K and a key frame WZ at an encoding end; 2, reconstructing the frame K in an inner-frame encoding and decoding manner, and outputting a frame K'; and 3, performing discrete cosine transformation, quantification and channel encoding on the frame WZ, generating information bit data and checking bit data, sending a selected sequence to a decoding end by a code rate optimizer according to the information bit data and the checking bit data, decoding by the decoding end according to edge information generated by the frame K and a sending sequence, and finally reconstructing the frame WZ to output a frame WZ'. By utilizing the method and the system, the quality of edge information is improved, so that the performance for reconstructing the frame WZ is improved, and the distributed video encoding scheme is simplified; and furthermore, under the condition of keeping the reconstruction quality, the encoding efficiency of distributed video encoding can be effectively improved.

The invention discloses a novel mixed modulation method based on visible light communication. The method comprises the steps of performing serial-parallel conversion on two random sequence signals toacquire two parallel signals; performing PPM modulation on one converted signal to acquire a PPM modulation signal; performing PAM-DMT modulation on the other converted signal to acquire a PAM-DMT signal; using a PPM signal to control superposition of the PAM-DMT signal and the PPM signal with different polarities to acquire a mixed modulation signal; after performing digital-to-analogue conversion on the mixed modulation signal, sending the converted signal to an optical receiver via an optical transmitter; performing analogue-to-digital conversion on the signal received by the optical receiver; separating the signal has been subjected to analogue-to-digital conversion; and separately performing pulse phase demodulation and PAM-DMT demodulation on the separated PPM signal and the PAM-DMTsignal to acquire the original two random sequence signals. According to the method provided by the invention, mixture of two physical layer channels is achieved, dual-data single channel transmissionis achieved, and bandwidth efficiency of a visible light system is improved.

The invention discloses a video tracking method based on spread fusion. The method comprises the following steps: (1) a frame of video image t of a known tracking object region is received; (2) the (t+1)th frame of video image is received, and then a candidate object region having a same size as the tth video image tracking object is sampled to form a candidate object set; (3) similarity between objects under character representations of HOG, LBP and Haar-likeare calculated separately to obtain the similarity; (4) spread fusion is performed on the calculated three similarities based on different character representations to fuse the three similarities into a similarity; (5) the candidate object region in the (t+1)th frame of video image having the highest with the known the tth video image tracking object as the position of the tracking object in the frame, and the(t+1)th frame of video image of the tracking object marked with a rectangular frame is outputted; (6) and letst=t+1, and the step (2) to the step (5) are repeated until the video is finished. According to the invention, the similarity between an similarity object and a candidate object is described through multiple similarities based on multiple character representations, so that the object tracking accuracy can be improved.

The invention discloses a balancing method with low complexity based on precoding for turbo. At a sending terminal of a communication system, signal coding is interleaved and coded, and then a precoding technique is adopted. After the interleaved and coded signal coding passes through an IS I-channel, signals are outputted and an expression thereof is that: y(n) is equal to sigma k is equal to 0h(k)c< - > (n-k) +w(n); at a receiving terminal, based on EXIT figures of an equalizer and an encoder in different signal-to-noise ratios and iterations, a P-TE proposal and a S-TE proposal are self-adaptively selected and a balancing algorithm capable of reducing the complexity of the system is adopted. External information is iterated and transferred between the equalizers or between the equalizer and the encoder, and passes through an interleaver and a de-interleaver in the process of the iteration, and finally when the iterations required by the system are realized or the performance meets the requirements, the iteration is stopped and a final output information sequence is obtained by judgment of the encoder. The balancing method with low complexity based on precoding for turbo can reduce the complexity of the system; the performance of the system can exceed the lower limit of an error rate in the conditions of no ISI channel with the same coding and decoding.

The invention relates to an underwater anti-interference transmission method based on prime digital interleaving and spinal cord coding, and belongs to the technical field of wireless communication coding and interleaving. The underwater anti-interference transmission method comprises: information bits to be transmitted being sequentially subjected to signal source interleaving and then verified;then, carrying out Spinal channel coding and channel interleaving; and finally, sending the signal to an underwater acoustic time-varying channel through OFDM modulation and up-conversion; the received signal processing module receiving the transmitted signals and sequentially performing demodulation and channel de-interleaving; and carrying out Spinal decoding and de-check, and finally, carryingout signal source de-interleaving to output recovered information bits. The method has the characteristics that the realization is flexible and the matrix dimension does not need to be considered deliberately. The bit error rate is effectively reduced. In addition, Spinal short code coding is adopted as channel coding, and compared with other channel coding, the complexity is relatively low. Underthe condition that the complexity is not increased or even reduced, the series connection error is greatly improved, and burst interference can be coped with.

The invention relates to an MIMO (multiple input multiple output) precoding control method based on lattice-basis reduction. The MIMO precoding control method comprises the following steps of: carrying out a lattice-basis reduction operation on a channel matrix to obtain a conversion matrix and a precoding matrix through a transmission end, processing an original emitting signal through the conversion matrix, and carrying out a modulo operation on the processed emitting signal; calculating according to the obtained precoding matrix and a result after the modulo to obtain a final emission vector of the transmission end and transmitting the final emission vector to the receiving end; and obtaining the original emitting signal transmitted by the transmission end after a receiving end carries out the modulo operation on the obtained receiving vector and finishes corresponding judgment. The method provided by the invention can be used for solving the problems that a control signal of a down link is increased and quantization error is large in a traditional precoding scheme based on the lattice-basis reduction.

The invention relates to a novel perception system structure for human bionic electronic skins. The structure includes acrylamide and lithium chloride based positioning layer gel and ionic liquid BMIMBF4 polymer based perception layer gel; and a VHB belt is arranged between the acrylamide and lithium chloride based positioning layer gel and the ionic liquid BMIMBF4 polymer based perception layer gel. Thus, the contradiction between positioning precision and system complexity in a distributed sensing system can be solved; and the structure can enhance the positioning precision without increasing the complexity of the system, so that the low cost and reliability of the system can be guaranteed.

The invention relates to a weak supervised object detection method based on a pixel gradient map of a specific object, which relates to a computer vision technology. A pixel gradient map of a specificobject is proposed. During the training process, a pixel gradient map of a particular object is extracted from the image. Based on the pixel gradient map of a particular object, the model can roughlyestimate the shape and position of the target object. The accumulated pixel gradient map of a particular object to conceal the corresponding image is used, and then the concealed data set to fine-tune the model is used, so that the model can find more parts of the object; an average-Maximum value pooling neural network layer, which can greatly help weak monitoring target detection, is proposed. The algorithm does not increase the complexity of the network model, nor does it use additional monitoring information. A large number of experimental results show that the performance of weak surveillance target detection and location is excellent.

The invention relates to a method and a device for controlling a production cell for producing plastic injection-moulded parts, according to which the production cycle is defined and parameterised by the user. The invention is based on a component-oriented control system. Components can be, for example, the mould closure, the injection unit, the core puller, the handling appliances etc., which are virtually formed in the control system. According to the invention, machine cycles are designed, managed and run on the basis of behaviourally complete components, together forming a domain model, by means of a specialised domain language. In this way, an injection-moulding machine can be used and operated in a universal and simple manner. The components appear on the display screen or operating surface and are used by the user as the basis for the modelling of any cycles. Furthermore, a domain language is used for each problem area in the control system, in order to describe solutions and to automatically generate the program code therefrom.

The invention provides a positioning system only using Doppler information based on a radar sensor network. The positioning system comprises the radar sensor network and an information fusion center. According to a special radar sensor distribution shape, the projection value of each radar sensor including an orthogonal demodulation structure of uniform motion target speed under the distribution shape is enabled to be approximate to a sinusoidal waveform so that Doppler speed of all targets corresponding to different radar sensors can be separated out more rapidly, and degree of complexity is not substantially increased due to increasing of the number of the targets and the radar sensors.

The invention discloses a method for improving the energy dissipation capacity of a precast segment assembled pier, which adopts a set of anti-seismic reinforcement device composed of a steel sleeve,an annular steel plate, a damper and a matching connector, and is installed on the precast segment assembled pier. The method of the invention can effectively improve the energy dissipation capacity of the precast segment assembling pier under the earthquake action, does not need to bury the reserved parts in the original structure, does not need to carry out operations such as punching and the like that destroy the original structure, redesigns the original structure and partially reinforces the original structure, and the like.

The invention provides an arm type collaborative planning method for a continuous type super-redundant mechanical arm, terminal equipment and a storage medium. The method comprises the steps: establishing a continuous type super-redundant mechanical arm kinematics model; constructing a virtual guide pipeline; solving an initial arm type of the virtual guide pipeline through a robot inverse kinematics equation; constructing artificial potential fields, wherein the artificial potential fields comprise guiding force potential fields generated by the virtual guiding pipeline; calculating the forceborne by the key points of the continuous type super-redundant mechanical arm in the guiding force potential fields, and planning the motion of the continuous type super-redundant mechanical arm according to the stress condition of the key points and the strategy that the sum of work done by the key points on the arm within the unit planning period is maximum till the continuous type super-redundant mechanical arm reaches the target arm type. The planning algorithm does not need to depend on inverse kinematics of the mechanical arm, so that the complexity of the planning algorithm cannot be remarkably increased along with increase of the degree of freedom of the mechanical arm.

The invention provides a fault diagnosis method based on an HBF neural network observer. The fault diagnosis method is used for conducting intelligent fault diagnosis. According to the method, an HBF neural network is adopted, the similarity between vectors can be signified through the Mahalanobis-like distance, the neuron number and the calculating speed are lowered, meanwhile, the neural network state observer is established, an abstracted non-linear system in engineering is observed, the system output prediction in the next step can be conducted through the output value of the state observer, and thus system fault diagnosis and detection can be achieved.

A secure device can make contents of terminal application authentication information calculation a different complicated calculation process at each time while suppressing the processing load in the secure device and a card application code size to low values. When issuing of a terminal application (302) is requested from an application loader (301) to an application management unit (1011), an instruction content execution unit (1012) embeds authentication information used for calculation of an authentication key required for authentication with an application causing an information processing terminal (30) to perform a process, into the terminal application (302). A calculation complicating unit (1013) creates a calculation problem having a calculation result as an answer and embeds it as a part of the authentication information calculation into the terminal application (302). An authentication information calculation unit (1014) calculates authentication information with the calculation result to create an authentication key. An authentication processing unit (1032) performs authentication of the terminal application (302) by the authentication key. This does not complicate the calculation process while making the authentication information calculation of the terminal application (302) a different complicated calculation at each time.

The invention particularly relates to a novel bit mapping method in a polarization code high-order modulation system. The invention belongs to the technical field of channel coding, which comprises the following steps of: taking a polarization code as a component code of a bit interleaved coded modulation (BICM) system, firstly sorting split channels where code word bits are located and equivalent channels of the BICM system according to different reliability degrees, and then distributing frozen bits on unreliable split channels to the equivalent channels with low modulator protection degrees, using an equivalent channel with a high modulator protection degree for transmitting information bits, and providing more protection for transmission of the information bits. The bit error rate performance of a bit-interleaved polarization coded modulation (BIPCM) system is obviously improved under the condition that the complexity is not obviously increased. Simulation results show that compared with a random mapping method and an interleaving mapping method, the novel bit mapping method provided by the invention obtains a certain degree of net coding gain in a BIPCM system.

The invention discloses a low internal reflection composite base material and a manufacturing method thereof. In the base material, a filtering or absorption effect of a shielding layer to light can be realized and ultralow internal reflection can be maintained. Compared to the base material of the shielding layer arranged on a routine coating film layer, the base material of the invention can be as low as 0.1%-0.2% (420nm-680nm). A manufacturing technology of the base material is simple. Compared to the manufacturing technology of the traditional base material which is coated with the shielding layer, a complex degree of the technology in the invention is not increased, and production cost is not increased either and even is decreased.

A wireless diversity receiver includes, in part, N signal processing paths, a bin-wise combiner, and an inverse transformation module. Each signal processing path includes, in part, a mixer adapted to downconvert a frequency of an RF signal received by that path, an analog-to-digital converter adapted to convert the downconverted signal from an analog signal to a digital signal, and a transformation block adapted to transform the digital signal represented in time domain to an associated frequency domain signal having M subband signals. The bin-wise combiner is configured to combine the corresponding subband signals of the N paths. The inverse transformation block is configured to transform the output of the bin-wise combiner to an associated time-domain signal.

The invention discloses a method for carrying out MU-MIMO under time duplex mode, comprising the steps of receiving uplink channel measuring pilot emitted by each user equipment in a domination area,; measuring uplink channel state information of each UE according to the uplink channel measuring pilot; determining a target UE group from all UEs according to the uplink channel state information and a first predetermined rule; generating precoding vector of each UE in the target UE group according to a second predetermined rule; and multiplying data stream and corresponding precoding vector of each UE in the target UE group. The invention also discloses a device for realizing the method. The embodiment of the invention sufficiently utilizes the symmetry of an upper channel and a lower channel under a TDD mode and transfers the original operation of UE processing to a BS side so as to avoid a series of problems caused by the mode based on codebook design.

The invention discloses a radio frequency identification (RFID) anti-collision method for an adaptive back-off mechanism. According to the method, different back-off factors are determined and selected according to collision position conditions in the process of identifying a reader, so that all the labels are efficiently and rapidly identified through the adaptive back-off mechanism. According to the method, the adaptive back-off mechanism can be performed, the identification efficiency is greatly improved, and the mechanism is simple and feasible in structure, short in searching time, low in energy consumption and suitable for an RFID application system with lots of strict label and energy consumption requirements.

The embodiments of the invention disclose a method and apparatus for preventing voice command misidentification. The method comprises the following steps: obtaining a lyrics file matching a song to be played; searching for a phrase which can be wrongly triggered easily in the lyrics file; according to the lyrics file, calculating first initial time and first finishing time of play of the phrase which can be wrongly triggered easily; and playing the song to be played, closing a voice identification module when it is the first initial time, and starting the voice identification module when it is the first finishing time. According to the technical scheme provided by the embodiments of the invention, the technical defects of increased processor calculation burden, rising equipment power consumption and difficult voice identification algorithm transplantation which are caused by increased complexity of a voice identification algorithm for reducing the probability of voice wrong trigger in the prior art are overcome, and voice misidentification caused by song play can also be reliably reduced without improving the complexity of the voice identification algorithm.

The invention discloses a method, device and chip for image encoding and decoding, and the encoding method comprises the steps: obtaining a run value sequence and a level value sequence through a quantized sequence of an image, obtaining the distribution probability of updated level values according to a mapping rule based on the distribution probability of run values and level values, and obtaining the distribution probability of updated level values according to the mapping rule; and finally, entropy coding is carried out according to the level value sequence and the distribution probabilityof the updated level values, and coded image data is output. And the decoding side only needs to additionally obtain the mapping rule to finish decoding. The method is simple to implement, the compression efficiency of the image can be improved, and the data volume of the representation image is effectively reduced.

Electronic device, comprising a first camera on a first side of the electronic device, the first camera arranged to form first sequential image frames; a second camera on a second side of the electronic device, the second camera arranged to form second sequential image frames; memory including program code; a processor; the memory and the program code being configured to, with the processor, cause the electronic device to: segment each of the first and the second sequential image frames into segments; determine at least one fixed point from the image frame segments; define at least one movement vector, for the determined at least one fixed point, based at least in part on a comparison of at least some of the sequential image frames; determine a change relative to the at least one selected fixed point based on the movement vector; and control a function of the electronic device based on the determined change.