Quasi-cyclic low-density parity-check (QC-LDPC) code and correcting and linear coding method thereof

The invention relates to a quasi-cyclic low-density parity-check (QC-LDPC) code and a correcting and linear coding method thereof. The variable nodes of the LDPC code, the dimensionality of which is greater than 2, are informational nodes; and the variable nodes the dimensionality of which is 2 form a big end-to-end ring on a bipartite graph. The correcting method comprises the following implementation steps: randomly selecting one edge on the big ring the dimensionality of which is 2, cutting off the edge, and filling 0 in the corresponding position of a low-density check matrix, thereby acquiring a corrected structure of the code. The linear coding method of the corrected code comprises the following implementation steps: firstly, multiplying an input information vector s and a part of the check matrix the load of which is greater than 2 as a vector by a matrix to acquire an intermediate vector u; directly intercepting the corresponding position of the intermediate vector u to acquire ...

Combination type wetland system for wastewater treatment and technique of wastewater treatment

The present invention relates to a sewage treatment combined wet land system and its sewage treatment process. Said sewage treatment combined wet land system includes biological regulation pool, aerobic degradation and microbial culture pool, artificial underflow wet land unit and artificial surface flow wet land unit, and its sewage treatment process includes the measures of natural precipitation, biological absorption, degradation and conversion, aeration reaction and others so as to make the sewage obtain purification treatment.

Safety display device interlocked with grounding wire and disconnecting switch

The invention discloses a safety display device interlocked with a grounding wire and an isolating switch, which comprises an isolating switch state and grounding wire detection circuit, a display outer frame and a connecting wire at the rear side of the display outer frame, and is characterized in that the isolating switch state and grounding wire detection circuit is provided with a relay and a sensor; an isolating switch on-off signal and a grounding wire physical detection signal are connected in series to control a display screen, display and switching of the live-line state of the vehicle depot contact network are achieved, safety prompt is provided for maintenance workers, and through arrangement of a side plate, a mounting bolt, a sliding groove, security glass and upper security glass, the safety of the maintenance workers is improved. When a shelter discarded by a maintainer in a vehicle depot is blown by wind to be adhered to the display screen to be blocked, the blocked shelter ...

Method for estimating sinusoidal signal frequency based on DFT

The invention discloses a method for estimating the sinusoidal signal frequency based on DFT. The method aims to achieve that root-mean-square errors of frequency estimation are all similar to a cramer-rao lower limit when relative frequency deviation is an arbitrary value, and the estimation performance of the method is superior to that of an existing frequency estimation algorithm. Through analysis of the performance of a Candan algorithm and the performance of a 2N point DFT algorithm, after necessary discretization preprocessing is conducted on original signals, frequency deviation is estimated through the Candan algorithm in the coarse estimation stage, and the frequency of the original signals is corrected through the frequency deviation; then fine estimation is conducted on the corrected original signals through the 2N point DFT algorithm. The step for correcting the frequency of the original signals is added, the advantages of the Candan algorithm and the advantages of the 2N point ...

Block agile frequency hopping method and system

The invention provides a block agile frequency hopping method and system. The method comprises the following steps: two parties of frequency hopping communication determine a frequency hopping sequence and a frequency hopping frequency table; the two parties of frequency hopping communication determine a frequency hopping block agile window length L in advance; dynamically calculating agile offset parameters in a next block window in real time in advance by a frequency hopping communication receiver according to a communication task demand; the frequency hopping communication receiver transmits the agility offset parameter of the next block window to the frequency hopping communication sender before agility of the next block window; and the frequency hopping communication sender carries out overall offset on the frequency hopping sequence in the next frequency hopping block agility window according to the received block agility offset value, outputs the offset frequency hopping sequence ...

Iteration demodulation decoding method of encoded modulation signals based on climax frequency deviation compensation

The invention relates to an iteration demodulation decoding method of encoded modulation signals based on climax frequency deviation compensation, effectively solving the problem of iteration demodulation decoding of an LDPC (Low Density Parity Check Codes) encoded BPSK (Binary Phase Shift Keying) modulation system under frequency deviation and an unknown-phase channel. The method comprises the following steps of: receiving one frame of a full frame of encoded modulation signals, and dividing the full frame into a plurality of signal subblocks; initializing the external information of encodedbits; carrying out frequency deviation estimation by adopting a revised M&M arithmetic according to the external information of the encoded bits and the sample value of the received one-frame signals; carrying out a Tikhonov demodulation arithmetic to complete signal demodulation according to the structure of the signal subblocks and the frequency deviation estimation, and outputting a demodulation ...

Method for screening and arranging artificial wetland winter plants for purifying domestic sewage in subtropical regions

The invention relates to technology for screening and arranging winter plants in artificial wetlands for purifying domestic sewage in subtropical regions. A method comprises the following steps of: screening seven plants with high purification capabilities, such as cress, rape, juncus effuses, saxifrage, Iris germannica, sweet osmanthus flower and flagIris according to adaptation capabilities andthree indexes such as a physiological property, a pollution resisting and removing capability and matrix enzyme activity; and combining and arranging the screened plants according to a sewage purification effect and a landscape effect. A winter artificial wetland plant mode has a good sewage purification effect, can operate safely and effectively in the subtropical regions and has certain landscape value.

Method for screening and arranging artificial wetland winter plants for purifying domestic sewage in subtropical regions

Parallel weighting bit upturn decoding method of low density check code

PN code capturing method used for satellite navigation system

The invention discloses a PN code capturing method used for a satellite navigation system. The method achieves the facts that under the environment that the initial phases of chips are unknown, a rapid search for all chip phase information is achieved, and code phases are captured correctly. The method comprises the steps that a section of a received signal is intercepted and supplemented with the same length of zeros, a local signal is segmented, partial folding processing is conducted on the local signal, and related matching operation is conducted on the received signal and the local signal; the code phases are captured in parallel by means of circular correlation calculation of fast Fourier transformation; energy detection is conducted on a related result corresponding to each code phase, wherein when an energy detection value is greater than a preset threshold value, it is determined that capturing is successful, and otherwise, the local signal is shifted horizontally, and the operation ...

Mobile communication terminal based on virtual service provider and automatic network switching and value added service recommendation methods of system

The invention discloses a mobile communication system based on a virtual service provider. The mobile communication system comprises a mobile terminal and a wireless communication network, the mobile terminal comprises an SIM/UIM card and a communication processing module, the two ends of the communication processing module are connected with the wireless communication network and the SIM/UIM card respectively, the wireless communication network is connected with a cloud computing center at the same time, and both the cloud computing center and the SIM/UIM card are provided by the virtual service provider. A mobile terminal interface is provided with an APP linked with the communication processing module, so that related parameters of the communication processing module can be recorded and displayed, and the communication processing module can be manually set via the APP interface. The invention also discloses automatic network switching and value added service recommendation methods of ...

Contractible fibre reinforcing fishing rod and production technology thereof

The invention relates to a fishing tackle used for sports or entertainments, in particular to a contractible fibre reinforcing fishing rod with large load bearing strength and a production technology thereof; wherein, the fishing rod comprises a sleeve and a plurality of sections of stepped pipe bodies which can be extended and contracted section by section, the pipe bodies are in cone shape, theend part connection type of the adjacent two pipe bodies is in interference fit connection except that of the adjacent pipe bodies in the middle position of the fishing rod is in dismountable erection joint; the pipe bodies of the fishing rod is prepared by the special production technology of the invention and then assembled; the fishing rod of the invention has larger robustness, the load bearing strength of the fishing rod is doubled to at least compared with that of the fishing rod prepared by the existing technology while the self weight of the fishing rod is not increased, and the fishing ...

Special fertilizer for kiri

The invention provides a special fertilizer for kiri. The special fertilizer for the kiri is prepared by combining organic fertilizers and artificial fertilizer and is suitable for the growth characteristics of the kiri.

Lightweight window pyramid network model and application thereof

The invention belongs to the field of image recognition, and particularly relates to a lightweight window pyramid network model and application thereof, and the lightweight window pyramid network model comprises Patchedding, Patchmerging and Transformerblock. The Patchedding module is used for carrying out average division on an input picture, and each obtained block is used as a vector to carry out subsequent attention calculation. The Patchmerging module carries out downsampling on an input feature map, so that the network can carry out feature calculation of different scales, and a plurality of feature maps with different resolutions are obtained. Transformerblock firstly performs attention calculation on windows of different sizes on an input feature map, so that a network can pay attention to features of different scales, then performs lightweight attention calculation on the features, so that interaction of information in different windows is realized, and finally, the features are ...

Cache Device And LCD Screen Production Line

The present disclosure provides a cache device and a LCD screen production line. The cache device provided by the present disclosure includes an outer frame having an opening for picking and placing cached items on a first side wall thereof and a support bracket for horizontally supporting cached items therein; and first blowing means disposed on the second side wall of the outer frame for blowing air toward the opening; second blowing means disposed on the third side wall or the fourth side wall of the outer frame; an exhaust means disposed on a fourth side wall opposite to the third side wall of the frame. 1. A cache device , comprising:a frame, a first side wall of which has an opening for picking and placing cached items;a support bracket located in an area surrounded by the frame for supporting cached items;first blowing means on a second side wall opposite to the first side wall of the frame; the first blowing means being configured to blow air toward the opening;second blowing means on a third side wall of the frame adjacent to the first side wall; andexhaust means disposed on a fourth side wall opposite to the third side wall of the frame.2. The cache device according to claim 1 , further comprising: third air blowing means provided on a fifth side wall of the frame; at least one vent provided on a sixth side wall opposed to the fifth side wall.3. The cache device according to claim 2 , wherein the second blowing means is configured that the pressure of the air steam blown is not less than the pressure of the air stream blown by the first blowing means claim 2 , and/or the third blowing means is configured that the pressure of the air stream blown is not less than the pressure of the air stream blown by the second blowing means.4. The cache device according to claim 2 , wherein the fourth side wall comprises a vertical guide plate claim 2 , on which at least one guide hole is arranged.5. The cache device according to claim 2 , wherein claim 2 ,the first ...

Multi-scale hole neighborhood attention calculation backbone network model and application thereof

The invention belongs to the field of image recognition, and particularly relates to a multi-scale hole neighborhood attention calculation backbone network model and application thereof, and the model consists of input, image feature extraction and output. The main body part is image feature extraction and has four stages, the first stage comprises an image block embedding layer and a hole Transformer module, and the second stage, the third stage and the fourth stage are the same in structure and comprise a down-sampling layer and a DT module. In the composition of the DT module, a core module is a hole neighborhood attention calculation module which is used for carrying out self-attention calculation on a feature map input into the part, and the global information of the image can be obtained while the local information of the image is obtained through the calculation of the hole neighborhood attention calculation module. Compared with the most advanced backbone network model at present ...

Commodity image retrieval method

The invention provides a commodity image retrieval method, which comprises the following steps of: establishing a commodity sample image recognition model, and training a deep convolutional neural network according to a commodity sample image with multi-semantic scale label information; after data enhancement operation is performed on the marked commodity sample image, inputting the marked commodity sample image into a convolutional layer of a deep convolutional neural network for feature extraction; specifying a deep convolutional neural network as a backbone network, copying the deep convolutional neural network and forming two branch networks; outputting the feature vector through a Softmax layer to obtain a commodity category sampling probability, and calculating a loss function value; and circulating the steps until a preset condition for training the deep convolutional neural network is achieved. Compared with the prior art, the performance of the commodity identification and retrieval ...

Position-recommendation-based Internet data processing system and method thereof

The invention discloses a position-recommendation-based Internet data processing system and a method thereof. The system comprises a mobile information processing center used for analyzing and excavating Internet data and outputting results to a subsequence recommendation system, wherein the mobile information processing center comprises a data warehouse and a data processing server which are connected with each other in sequence; the data warehouse is used for storing and preprocessing the Internet data and comprises a data clearing module, a data converting module and a data integrating module which are connected with one another in sequence; the data processing server adopts a Hadoop platform and comprises an HDFS module and a MapReduce module which are connected with each other in sequence. By virtue of the position-recommendation-based Internet data processing system and the method thereof, the disorganized Internet data is preprocessed, analyzed and excavated, so that the Internet ...

Oil return formula fluid coupling device

The utility model discloses an oil return formula fluid coupling device belongs to hydraulic transmission device technical field, including bearing box, rotor, bearing, pump impeller and the setting turbine in the bearing box, the rotor passes through the bearing to be fixed on the bearing box, and the pump impeller is connected on the rotor, and it has oil outlet, its characterized in that to open on the bearing box: still include the breather valve, the breather valve includes the hollow tube and connects the valve cap on the hollow tube, the hollow tube is connected on the oil outlet of bearing box, the valve cap is hemispherically, and it has a plurality of exhaust holes to open in the plane portion of valve cap, and it has a plurality of through -holes to open in the sphere portion of valve cap, be connected with the waffle slab on the inner wall of valve cap. The utility model discloses a hemispherical this kind of valve cap structure can effectively prevent the production of breather ...

Contractible fibre reinforcing fishing rod and production technology thereof

The invention relates to a fishing tackle used for sports or entertainments, in particular to a contractible fibre reinforcing fishing rod with large load bearing strength and a production technology thereof; wherein, the fishing rod comprises a sleeve and a plurality of sections of stepped pipe bodies which can be extended and contracted section by section, the pipe bodies are in cone shape, the end part connection type of the adjacent two pipe bodies is in interference fit connection except that of the adjacent pipe bodies in the middle position of the fishing rod is in dismountable erection joint; the pipe bodies of the fishing rod is prepared by the special production technology of the invention and then assembled; the fishing rod of the invention has larger robustness, the load bearing strength of the fishing rod is doubled to at least compared with that of the fishing rod prepared by the existing technology while the self weight of the fishing rod is not increased, and the fishing ...

Method and device of iterative demodulation and decode for BPSK modulating system by Turbo encoding

The split signal received in the channel is transferred to two sub decoders. With the channel receiving signal being received, the subdecoder 1 calculates out the external information and the information bits size of the equivalent system by using the module in soft-in and sort-out. The sub decoder 2 receives the said information from the output of the decoder 1. Then, the sub decoder 2 calculates and outputs the external information, transferring the information to the decoder 1. Thus, one time of iteration is completed. When the number of iteration reaches a preset value, with the interlacement of the external information output from the decoder 2 being removed, the hard decision is carried out to obtain a estimate value for each information bit, and the decoding procedure is completed.The invention features simple, practical and easy to implement in digital format, suitable to wireless and satellite communications area.

Multi-positioning printing method for paperboard color printing

The invention discloses a multi-positioning printing method for paperboard color printing, particularly relates to the technical field of paperboard printing, and comprises the steps of 1, printing plate numbering, 2, target supporting plate and execution paperboard determination, 3, data acquisition and execution, and 4, printing plate control and color printing. According to the printing position of the target paperboard and the color printing size, the multiple positioning printing effect is achieved on the multiple execution paperboards, the copying and pasting effect of the execution paperboards with the target paperboard as the reference is achieved, and therefore it is guaranteed that the color printing images and sizes of all the paperboards are located at the same position; the color printing effect and the color printing efficiency of the paperboards are improved, the position of the printing plate is adjusted according to the error of the color printing positions among the multiple ...

Organic bacterial fertilizer for restoration of manganese ore-polluted soil, as well as preparation method thereof

The invention discloses an organic bacterial fertilizer for the restoration of manganese ore-polluted soil, as well as a preparation method thereof. The organic bacterial fertilizer comprises the following raw materials in parts by mass: 3-5 parts of basic nutrient solution, 20-25 parts of remissive complex organic raw materials, 70-75 parts of water retention media and 3-5 parts of anti-manganese complex microbial agent. The preparation method comprises the mixing and fermentation steps. The organic bacterial fertilizer for the restoration of manganese ore-polluted soil has the effects that the soil structure is modified, the water retention and constant temperature can be achieved, the toxicity of heavy metals around roots can be reduced, the survival rate of plants can be increased, and the growth of plants can be promoted; in addition, the toxicity of manganese elements in the soil of plant roots can also be effectively relieved, the effect of the organic fertilizer can be enhanced, ...

Method and device of iterative demodulation and decode for BPSK modulating system by Turbo encoding

Telecommunication service small file storage system and method based on Hadoop

The invention discloses a telecommunication service small file storage system and method based on Hadoop. The system comprises a data acquisition unit, a data transmission unit and an HDFS (Hadoop Distributed File System), wherein a file preprocessing unit is arranged between the data transmission unit and the HDFS and comprises a main server and distributed parallel small file processing servers, and the distributed parallel small file processing servers store corresponding small files according to different file types. When each user file is uploaded to the file preprocessing unit through the data transmission unit, the main server judges the size of the file, the small file is stored to the distributed parallel small file processing server, and the small files are merged and an index is established by using a SequenceFile container. The system and method have the advantage of simple algorithm, convenience and rapidness in storing and reading files, fast speed and high efficiency.

Physical layer authentication method based on multi-carrier transmission

The invention discloses a physical layer authentication method based on multi-carrier transmission. According to the method, based on the multi-carrier transmission, channels are regarded as a set of M fading sub-channels, and the reciprocity and randomness of phase responses of the sub-channels are used for performing on identity authentication on both parties of communication. The method includes the implementation steps that Alice transmits an excitation signal to Bob, the phase difference of the multi-carrier channels is measured after Bob receives the excitation signal, then Bob transmits a signal where a shared secrete key is packaged to Alice, and Alice authenticates whether the signal is from Bob or not according to the received signal and the shared secrete key. According to the authentication process of the method, the characteristics of the phase responses of the channels are used, and kinds of spoofing attacks such as the interference attack, the replay attach, impersonation ...

Water-solubility polymer containing amino-acid or peptide radicals as well as preparation method and application thereof

The invention provides a water-solubility polymer containing amino-acid or peptide radicals as well as a preparation method and an application thereof. The water-solubility polymer containing amino-acid or peptide radicals is a conjugated polymer material with main chains having a conjugated structure and side chains containing amino-acid or peptide radicals, and has fluorescence emission and excellent solubility in water. The range of solubility is from 1mg/ml to 500mg/ml, and the high fluorescence quantum efficiency phi of the water-solubility polymer containing amino-acid or peptide radicals in water is from 10 percent to 95 percent. The water-solubility polymer containing amino-acid or peptide radicals can be used as a luminous material to be used on an electroluminescence device and a fluorescence probe to be used on a sensor. In addition, the water-solubility polymer containing amino-acid or peptide radicals is a polyelectrolyte, thus, the water-solubility polymer containing amino-acid ...

Broadband communication anti-interference distributed compressed sensing system and method

The invention discloses an anti-interference distributed compressed sensing system and method for broadband communication, and the system comprises a sensor which is configured to sense a sub-band signal of a to-be-sensed broadband signal, and obtains a short-time frequency spectrum of a sub-band; the encoder is configured to perform compression encoding operation according to the short-time frequency spectrum of the sub-band to obtain an encoding vector; the binarization module is configured to perform binarization operation according to the coding vector to obtain a binary frequency spectrum information compression frame; the decoder is configured to perform frequency spectrum decoding operation according to the binary frequency spectrum information compression frame to obtain a reconstructed short-time frequency spectrum of the sub-band; and the fusion center is configured to obtain a broadband frequency spectrum according to the reconstructed short-time frequency spectrum of the sub-band ...

Method for positioning wireless sensor network based on RSS

The invention discloses a method for positioning a wireless sensor network based on RSS. The method aims to widen application fields on the premise that positioning accuracy is guaranteed. The positioning step is divided into two stages, namely the coarse positioning stage and the fine positioning stage. In the coarse positioning stage, a compressed sensing technology is utilized to collect a small number of data as soon as possible to reconstruct a probable existence range of a target; in the fine positioning stage, according to a target positioning region acquired in the coarse positioning stage, a multilateral measuring technology is utilized to accurately position the positioning target. According to the method, the limitation that an unknown target only can be positioned in a grid center can be overcome, the application fields of the compressed sensing positioning method are widened, and complexity is lowered.

Artificial wetland warm season and cold season plants interplanting configuration method in subtropical areas

The invention relates to an artificial wetland warm season and cold season plants interplanting configuration method in subtropical areas, naturally and alternately growing characteristics of warm season and cold season plants are utilized, warm season plants are harvested firstly when the overground parts of the end of the autumn plants are withered and yellow, then cold season plants are interplanted between the plants, the overground parts of the warm season plants are dead when in cold seasons, the clod season plants grow naturally and can be harvested when in late spring, and at the time, the overground parts of the warm season plants have grown. According to the invention, the season changing problem of the plants can be solved, the warm season plants do not need to be changed, the microenvironment conditions nearby the root are not changed, the sewage treating effect can be ensured, the influence of seasons and climates is less, the aspect change of the plant is increased, and the ...

Sparse signal reconstructing method based on refining and partitioning search

The invention discloses a sparse signal reconstructing method based on refining and partitioning search. The method is used for reconstructing sparse signals under the framework of the CS technology. According to the method, partitioning search is carried out through the simple updating criterion of the MP algorithm, the number of application times of the least-square method is decreased, and the complexity of the OMP algorithm is reduced; the reconstructing performance is improved through the refining method, firstly, extending search is carried out on an index set, and then the indexes of the known number are refined through the least-square method; the reconstructing performance and the complexity are balanced by adjusting the size of partitions and extending the dimensionality of the index set. The method can effectively improve the reconstructing performance of the OMP algorithm and greatly increase the reconstructing speed.

Artificial wetland warm season and cold season plants interplanting configuration method in subtropical areas

The invention relates to an artificial wetland warm season and cold season plants interplanting configuration method in subtropical areas, naturally and alternately growing characteristics of warm season and cold season plants are utilized, warm season plants are harvested firstly when the overground parts of autumn plants are withered and yellow, then cold season plants are interplanted between the plants, the overground parts of the warm season plants are dead when in cold seasons, the clod season plants grow naturally and can be harvested when in late spring, and at the time, the overground parts of the warm season plants have grown. According to the invention, the season changing problem of the plants can be solved, the warm season plants do not need to be changed, the microenvironment conditions nearby the root are not changed, the sewage treating effect can be ensured, the influence of seasons and climates is less, the aspect change of the plant is increased, and the stronger view ...

Obstacle identification method and device based on obliquely-installed single-line laser radar

The invention discloses an obstacle identification method and device based on an obliquely-installed single-line laser radar. The identification method comprises the following steps: preprocessing point cloud data obtained by an obliquely mounted single-line laser radar; screening the preprocessed point cloud data, and removing the point cloud data corresponding to the ground point and the slope point to obtain the screened point cloud data; performing clustering analysis on the screened point cloud data; merging the clustering data with the same label; wherein the removal is determined according to calculation of the point cloud data PCt + 1 of the current frame and the point cloud data PCt of the previous frame. Non-obstacles such as the ground and slopes can be effectively removed in the recognition process, additional auxiliary equipment is not needed, cost is low, and work is efficient.

Wireless network positioning method with high target identification performance based on GMP (Greed Matching Pursuit) algorithm

The invention discloses a wireless network positioning method with high target identification performance based on a GMP (Greed Matching Pursuit) algorithm. Through the method, the target identification performance under the condition of unknown target number is enhanced. The method comprises the following two positioning stages: acquiring the possible positions of most targets by using a conventional GMP algorithm, introducing a redefined threshold value, and selecting the possible positions of more targets from the rest of grids in order to lower the loss probability of the targets; and removing certain abnormal values from target position estimation values by using a least square (LS) method in order to lower the false alarm probability of the targets. As proved by an experimental result, compared with a conventional GMP method, the method has higher target identification capability under the situation of unknown target number.

Robust and fast vehicle single-line laser radar point cloud clustering method

The invention relates to the technical field of radio wave reflection positioning and detection, and provides a robust and rapid single-line laser radar point cloud clustering method for a vehicle. The method comprises the steps that a laser radar obtains point cloud and sets voxel related parameters; establishing a polar coordinate structure array and a voxel structure; traversing the point cloud, calculating polar coordinates of each point, dividing voxel grids, and establishing an index relationship; traversing the polar coordinate structure array, and calculating a structure index corresponding to each point; putting points with the same index into the same voxel structural body, storing a serial number of each point, and establishing a voxel structural body hash table; traversing the hash table to obtain a current voxel structure index, and performing communication search; and after the current cycle is ended, obtaining the next frame of point cloud, and continuing calculation. According ...

Organic bacterial manure for lead zinc ore contaminated soil remediation and preparation method of organic bacterial manure

The invention discloses an organic bacterial manure for lead zinc ore contaminated soil remediation and a preparation method of the organic bacterial manure. The organic bacterial manure for lead zinc ore contaminated soil remediation is prepared from 1-5 parts by weight of basic nutrient solution, 20-25 parts by weight of remitting composite organic raw materials, 70-75 parts by weight of water-retaining medium and 3-5 parts by weight of lead/zinc-resisting composite microbial agent; the preparation method of the organic bacterial manure comprises the steps of mixing and fermenting. The organic bacterial manure for lead zinc ore contaminated soil remediation has the effects of retaining water, improving soil and raising the soil fertility; in addition, the toxicity of the lead and zinc elements in the plant rhizosphere soil can be effectively remitted, the efficacy of the organic fertilizer is improved and the restoration capacity of the plants is enhanced.

Physical layer key extraction method based on channel characteristic

The present invention provides a physical layer key extraction method based on a channel characteristic. Two legitimate communications parties obtain a channel characteristic sequence through channel estimation, then an improved level-crossing algorithm is introduced to carry out screening and cumulative processing on the channel characteristic sequence, and the channel characteristic sequence is updated. KL transform is used to remove the correlation between updated channel characteristic sequence sample values. Finally, a multi-bit adaptive quantization (MAQ) scheme is used to quantize the channel characteristic sequence with correlation removal as a key bit string. An experimental result shows that the method has a higher key generation rate than a level-crossing key generation program and has better key inconsistency rate than a HRUBE scheme, a random need is satisfied by the key bit string generated by the scheme, and key enhancement processing is not needed.

Minimum sum decoding method of selective annealing of low density parity check code

The invention relates to a minimum sum decoding method of selective annealing of a low density parity check code, which is suitable for soft decision decoding of the low density parity check codes and replaces the traditional multiplicative revise minimum sum decoding method. Based on the minimum sum decoding method, the invention adopts a multiplicative factor smaller than 1 to revise output of check nodes with unsuccessful check. The method comprises the following implementation steps of: merging external information quantity input by the check nodes and information from a channel by a variable node as decision soft information of iteration; probing whether a decision sequence satisfies a check equation; taking down or updating a node sequence set U with unsuccessful check, if U is empty, finishing decoding, and if U is not empty, updating and outputting information to the variable node by the check nodes based on minimum sum regulations; carrying out annealing treatment on check node ...

Flow type medium server system based on internet

The present invention relates to a flow type medium server system based on internet, which transmits the screen and video program to the web page browser of users. The system includes a flow type media server which adopts RMTP as a communication protocol of the video flow type play. The system can respectively call different video or character pattern data in a plurality of pictures, and can play contents of these different video or character pattern data displayed in a plurality of independence regions in a flow-type in a video play picture at a same network. The inventive flow type medium server system based on internet, through a flow type media server, can call a plurality of background transparent elements to display on the screen, and the displayed amount of information is large and the representative style is various. The flow type medium server system based on internet uses the variable band-width technique and flow type transmission technique, thereby people can enjoy high-quality ...

Cache device and LCD screen production line

The present disclosure provides a cache device and a LCD screen production line. The cache device provided by the present disclosure includes an outer frame having an opening for picking and placing cached items on a first side wall thereof and a support bracket for horizontally supporting cached items therein; and first blowing means disposed on the second side wall of the outer frame for blowing air toward the opening; second blowing means disposed on the third side wall or the fourth side wall of the outer frame; an exhaust means disposed on a fourth side wall opposite to the third side wall of the frame.

Bit flipping decoding method and device

The invention provides a bit flipping decoding method and device, and the method comprises the steps: carrying out the decoding through a polar code serial offset list decoder for the first time, constructing a flipping position set C in the decoding process of the polar code serial offset list decoder, and ending the decoding if a decoding result passes the cyclic redundancy check; if the overturning position set C is an empty set, decoding is ended, otherwise, one position is selected from the overturning position set C and deleted from the overturning position set C, the polar code serial offset list decoder is restarted at the position, the last L of the 2L sorting paths are selected as survival paths for decoding, and if a decoding result passes cyclic redundancy check, decoding is ended. And if so, ending decoding. Compared with the prior art, the method has the advantages that the performance is more excellent under the same flipping times, the accuracy of bit flipping can be effectively ...

Method for remedying heavy metal contaminated soil by energy plant configuration mode

The invention discloses a method for remedying heavy metal contaminated soil by an energy plant configuration mode. According to the method, energy plants with tolerance to heavy metals are selected to be used for constructing plant communities on the heavy metal contaminated soil. In soil contaminated by lead and zinc, the energy plants can fix the heavy metals to the roots through the retention effect of the roots, on one hand, the energy plants can protect themselves from damage caused by the heavy metals or alleviate the damage while grow normally, and on the other hand, the energy plants can prevent the heavy metals from diffusing to surrounding non-mining soil, farmland and water bodies. After the fruits of the oil plants ripen, the fruits can be used for preparing biodiesel by extracting, physical modification and chemical processing; after heavy metals in the oil are removed by hydrotreating, the oil can be used as industrial oil; residues can be used as a briquette fuel; thus, ...