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The invention discloses an identity and access control and management system and method in a cloud environment. The system comprises an identity and access control and management system (IAM), a user terminal and an application server. For different application services, integrated identity authentication and unified user management follow an identity authentication and access control separation principle, and user identity and access control management is realized. On the respect of user identity information management, from generation to cancellation of the user identity, a registration service provides self-help service for the user; on the respect of user authentication, a double-factor authentication technology is used for realizing the bidirectional authentication of the user and an authentication server and issuing an authentication bill to realize one-time authentication and multi-time use; and on the respect of access control and management, the access authority of the user is managed based on a role access control strategy of a user group, and the server is authorized to issue an authorized bill to the user. By adopting the identity and access control and management system and method disclosed by the invention, the user is convenient to manage the identity information, multi-time authentication is avoided, the authentication security is enhanced, and the illegal access of unauthorized users is prevented.

The embodiment of the invention discloses a vehicle positioning method and device, equipment and a medium, and relates to the technical field of intelligent driving, and the method comprises the stepsof obtaining the inertial measurement data of a vehicle at a current moment, the wheel speed of the vehicle and a target image of an environment where the vehicle is located; calculating a predictedpose of the vehicle at the current moment by utilizing the inertia measurement data and the vehicle wheel speed; calling a high-precision map comprising the information of the current environment of the vehicle based on the predicted position coordinates in the predicted pose; and correcting the predicted pose by using the target image and the high-precision map to obtain a target pose of the vehicle at the current moment. According to the embodiment of the invention, low-cost sensor deployment can be realized, the vehicle positioning precision is improved, and the method can be applied to a relatively wide positioning environment.

Method and arrangement in a relay node, for selecting communication mode. The relay node is configured to communicate with a base station via a donor antenna over a first link and to communicate with a user equipment via a coverage antenna over a second link. The method comprises obtaining an isolation value, based on the radio wave isolation between the relay donor antenna and the relay coverage antenna. The obtained isolation value is compared with an isolation threshold level value. The relay node is configured to communicate in full duplex mode if the obtained isolation value exceeds the isolation threshold level value, otherwise in half duplex mode. Information concerning the configured duplex mode of the relay node is transmitted to the base station. Also a method and arrangement in a base station is described.

The invention discloses an intelligent port logistics system and device based on a third-generation (3G) internet of things application platform and relates to collection and distribution, transit shipment, storage, trading, processing, ports, multimodal transport, cargo agency and device dispatching management of port cargoes. The intelligent port logistics system and device comprises a port logistics system and device and is characterized in that the 3G technology and the internet of things technology are integrated into the port logistics system and device to form the intelligent port logistics system and device. The intelligent port logistics system and device is provided with a real-time remote data collection processing system, a monitoring system and an operation system and device, and improves operation efficiencies in links of port logistics operation, transport service, port management, the port logistics system and device and the like. The intelligent port logistics system has individuality identification and data sharing functions due to internet of things chips arranged on the port logistics device and cargoes, can achieve mutual connection of things, achieves remote control and reduces port logistics cost, and a modern port logistics system which is real-time, accurate, efficient and high-quality in the port service range can be built in future.

The present invention relates to a smart home service robot with a height of 1.0-1.4 meters and a ground mobile type. An integrated smart home gateway control center integrating a Wi-Fi router and a ZigBee gateway module is installed on a machine body, and the machine body is provided with an infrared, 315 / 433 MHz radio frequency controller. The smart home gateway control center can be connected to all kinds of environmental sensors, security monitoring equipment, health testing equipment, motion monitoring equipment, and actuators and controllers of various types of intelligent systems and products. The smart home gateway control center adopts the Android operating system and is equipped with a smart home product connection and configuration management system, smart home touch screen interactive control software, smart home voice interaction control software and smart home cloud connection and analysis software, and is connected to a remote smart phone terminal APP and PC-side application software. This smart home service robot supports three kinds of control methods: voice interaction, touch-screen touch interaction and remote control interaction control.

The present invention relates to a correction method and system of a ship sailing trajectory. The method comprises a step of obtaining ship sailing trajectory points recorded by a ship automatic identification system, wherein the sailing trajectory points are coordinate points which express the positions of a ship sent to shore-based equipment by ship-borne equipment, a step of identifying the noise in the sailing trajectory points according to the coordinate information of a sailing trajectory, and determining the real sailing trajectory points and noises in the sailing trajectory, a step of eliminating the noises in the sailing trajectory, and correcting the sailing trajectory according to the real sailing trajectory points to obtain the corrected sailing trajectory of the ship. According to the scheme of the invention, the correction of the sailing trajectory of the ship is realized, the condition of abnormal ship sailing trajectory in AIS system information can be corrected, and the more real and effective available sailing trajectory can be provided.

There are provided a switched reluctance motor which can be easily manufactured and available for automation, and a manufacturing method thereof. The motor includes: a stator with a coil wound therearound; and a control board coupled to one side of the stator, the coil being electrically connected to the control board, wherein the control board includes a coupling recess in which the coil is fixedly bonded and a guide recess allowing the coil to be moved into the coupling recess from the outside of the control board.

The invention provides an implement method and system of microwave photon radar for small target detection or real-time tracking imaging. The implement system mainly comprises a transmitter, a receiver and a control and data processing center. According to the transmitter, a continuous single frequency laser is used as light sources of an entire radar system, and then a required high-frequency wide-band radar radio-frequency signal is generated by using an optoelectronic combined high frequency doubling method. The receiver uses an optical signal from the transmitter as an optical local oscillator to perform optical mixing and receiving of radar echo. According to the control and data processing center, the workflow of the entire radar system is controlled and the extraction of target information in an echo signal is realized. The implement method and system utilize the advantages of optical high frequency doubling to generate an ultra-wideband radar signal, the resolution ratio of centimeter or even sub-centimeter magnitude is realized, and identifying of a target feature by imaging a target is sufficient; a multi-branch photoelectric conversion front-end framework is proposed, the potential of an electronic power amplifier is fully exerted, and the requirements of the low-frequency narrow-band remote detection function and the high-frequency wideband short-range imaging function can be met only by branch switching; and the advantages of electric low-frequency high-quality signals and optical wideband compatibility can be simultaneously exerted, and long-distance detectionand close-range real-time imaging supervision of small flying targets such as unmanned aerial vehicles can be realized based on a set of the system.

The invention relates to a network information security synthesis managing method based on safety application server. The invention belongs to information security field. The method is: the browser on the client terminal selects one of the security managing application server, security method application server, security auditing application server; when the connection is crated, the client terminal browser sends out instructions, the application server calls the connection created managing object server according to the demands, then the managing object server extracts the information to the managed security resources with three protocol to map the middle piece; when the middle piece receives the data gathering application, it gathers data to the security resources, the gathered data is converted and transmitted to the managing object server according to the mode defined by the mapping middle piece, the managing object server stores the data into the managing object information bank, then tells the application server; the application server calls the managing data to be analyzed through the managing object sever, finally, it is returned to the client terminal browser.

The present invention discloses a civil airport navigational lighting aid flight verification method based on an unmanned aerial vehicle technology. The method is characterized by verifying and reporting the colors, the optical variability and the brightness change of different elevation angles of the navigational lighting aids, involving an unmanned aerial vehicle equipped with a light induction sensor, a GPS and a wireless data exchange transmission device and an airport runway precision approach path indicator (PAPI), and comprises a linear flat flight verification method, a curved flat flight verification method and an approach flight verification method. The novel civil airport PAPI light flight verification method of the present invention can realize the flight in the manners of the linear flight, the curved flight, the hovering reciprocating flight, etc., with the help of the flight characteristics of the unmanned aerial vehicle, and by being different from the characteristics that the flight speed is fast, the observation position is dynamic and fuzzy, the flight line is single and is not flexible, etc., when a conventional manned vehicle carries out the light flight verification on the PAPI, can occupy the better observation positions, and enables the observation data to be quantified more fully, more accurately and more objectively.

Methods and devices for rejuvenating, supplementing, or bypassing an individual fuel cell or a group of fuel cells, in a fuel cell stack, is disclosed. The methods and devices provide for a mechanism for removing catalyst poisons on both the anode portion and the cathode portion of the fuel cell and providing an improvement in the operation of the electrolytes. A controller that controls a variable resistor or a variable power supply in parallel with an individual fuel cell or a group of fuel cells in a stack is utilized. Adjusting the resistive value of the variable resistor, or the voltage level of the variable power supply, directly controls the current in the fuel cell. In accordance with Kirchoff s Current Law, decreasing the fuel cell voltage increases the current through the fuel cell, while the fuel cell stack is operational, and poisons deposited on the anode and cathode electrocatalysts are removed, thereby rejuvenating the fuel cell. Typically, the removal of cell poisons only requires short, periodic pulsing of the fuel cell potential. Methods and devices for determining the limiting processes within a fuel cell thus enabling the optimization of the fuel cell stack performance to diagnose the fuel cell stack are also disclosed.

The invention discloses a method for protecting privacy of a wifi fingerprint indoor positioning system through utilization of differential privacy. The method comprises the steps of collecting a real-time wifi fingerprint at a to-be-positioned user side, wherein the real-time wifi fingerprint comprises an access point AP name and corresponding received signal strength RSS, and sending an AP sequence to a server; selecting fingerprint records with the same AP sequence from a database by the server according to the AP sequence sent by the user side, thereby forming a fingerprint data set; carrying out iterative clustering on sample point positions of the fingerprint records and carrying out noise addition processing in a clustering process, thereby forming k clusters; for each reference point position, replacing an original position by selecting a new position based on a probability, and sending the updated fingerprint data set back to a user; and calculating the Euclidean distance between the real-time fingerprint and the fingerprint in the received data set, at the user side, and estimating the position of the user through adoption of an improved KNN method. According to the method, the data availability is ensued and moreover, the data privacy is protected. For the user side, through application of the method, the position privacy of the user can be protected.

The invention discloses a 3D printing individualized in-vitro bone. The in-vitro bone is made through the steps that 1, three-dimensional scanning information data of body parts of a patient and structural characteristics of the three-dimensional scanning information data are analyzed; 2, three-dimensional images of the scanned parts of the patients are obtained through computer precision reduction; 3, the three-dimensional images are analyzed and dissected, reverse data of the scanned parts are obtained, and a three-dimensional model of the reverse data is obtained through reestablishment; 4, the three-dimension model is stored or converted as a formatted file ; 5, a three-dimensional model of an in-vitro bone auxiliary device is designed out through a computer; 6, improvement and perfection are conducted through comparison and detection; 7, auxiliary dynamic simulation is conducted through a computer; 8, the simulation result is stored as a formatted file; 9, auxiliary transpose of the 3D printing individualized in-vitro bone is achieved, and a physical model is achieved rapidly; 10, proper surface processing is conducted according to the 3D printing effect, and the use requirement is achieved. According to the 3D printing individualized in-vitro bone, based on individual 3D structure data and characteristics, an auxiliary device for assisting limbs in achieving the mechanical activity function is planed and designed.

The invention generally pertains to onboard systems for passengers such as In-Flight Entertainment (IFE) Systems. The invention more particularly relates to a system and a method for accessing a personal computer device onboard an aircraft and to an aircraft including such a system. The system includes an onboard network to which is connected at least one interface at a passenger's seat, connection means for connecting said personal computer device to the onboard network, and the system is arranged so that said interface and said personal computer device interact via the transmission of data on said onboard network.

The invention relates to a block chain hidden information transmission method and system based on dynamic marking. The method comprises the following steps: counting data true probability distributionof an OP_RETURN field of a block chain protocol; generating a dynamic mark according to the negotiated seed and the data real probability distribution of the OP_RETURN field; and enabling the sendernode to fill the dynamic marks into the OP_RETURN fields of the two transactions, performing digital signature by adopting an elliptic curve cryptographic algorithm, and sending the two signed transactions to the block chain; enabling the receiver node to identify the two transactions according to the dynamic marks, performing elliptic curve cryptography algorithm random number leakage attack on digital signatures of the two transactions, calculating used random factors, deducing a private key, namely an encoded encrypted message, decoding the encrypted message and decrypting the encrypted message by using a secret key negotiated with the sender node. According to the invention, the undetectability and tracking resistance of the channel can be realized, the strong robustness is satisfied,and the risk of user privacy exposure is greatly reduced.

The invention discloses a power distribution surveillance video data transmission system based on a metropolitan area network distributed architecture. The power distribution surveillance video data transmission system comprises a photographic device in a power distribution room in a community, a converging device used for converging multiple paths of power distribution video surveillance signals, and a power distribution video surveillance platform. The photographic device sends the multiple paths of power distribution video surveillance signals to the converging device for backup. The converging device is connected and communicated with the power distribution video surveillance platform through an electric power gateway with a firewall function and a metropolitan area network special for electric power. The power distribution video surveillance platform actively issues a flow guiding demand instruction to the converging device in the community, and the converging device in the community responds and then uploads power distribution video surveillance signal data which is collected through the photographic device in the power distribution room according to the instruction. The invention also discloses a power distribution surveillance video data transmission control method based on the metropolitan area network distributed architecture at the same time. According to the power distribution surveillance video data transmission system and the power distribution surveillance video data transmission control method based on the metropolitan area network distributed architecture, necessary hardware investment cost is reduced, existing network conditions and resources are fully utilized, network loads and long-time bandwidth occupation are reduced, and ordered management of a city-level power distribution equipment surveillance system is realized.

The invention relates to a railway four-electricity engineering BIM model Web lightweight method, which comprises the following steps: establishing a standard unit library based on a railway four-electricity BIM model, and respectively carrying out model attribute definition and establishing a corresponding unit model library; all the professional standard unit models are subjected to railway four-electricity engineering BIM model general building; after classification, different lightweight optimization schemes are used according to different classes, and SIM data files are generated; the method comprises the following steps: constructing a Web lightweight platform by using a Three.js technology, reading an SIM data file, and displaying a railway four-electricity engineering model on Web,thereby realizing detection of key feature information of the railway four-electricity engineering model on the Web lightweight platform. Lightweight processing is performed on the railway four-electric BIM model file through the BIM lightweight plug-in, geometric information and attribute information are extracted from the model data at the same time in the processing process, then deep optimization is performed on the display content through the instantiation technology, and the loading efficiency and fluency are ensured.

The invention discloses a tail end space energy consumption prediction method based on building total energy consumption, a medium and equipment, and the method comprises the steps of sequentially transmitting preprocessed sample data of N tail end spaces at a moment t and first tau time steps into a tail end space energy consumption prediction model in each step of model training; enabling the model to obtain N tail end space energy consumption prediction values at the t moment through N times of forward calculation, adding the N tail end space energy consumption prediction values to the actual total energy consumption of the building to calculate a loss function, and adjusting parameters of the tail end space energy consumption prediction model through back propagation of a gradient descent method; repeating the training process on the sample data at all moments until the model converges to the prediction precision, and completing the training of the end space energy consumption prediction model; and predicting the energy consumption generated by the tail end space by using the obtained tail end space energy consumption prediction model through the controller parameters of the tail end devices, the temperature and humidity sensors, the Internet weather information, the people flow density, the power of the electric appliances and the lighting devices and the house structure parameters in the operation process of the building heating and ventilation system. According to the invention, the training of the tail end space energy consumption prediction model is realized underthe condition that the tail end space energy consumption historical data is missing.

The invention discloses a method for preparing artificial soil through mixed pyrolysis of lead-copper tailings and crop straw. The method comprises the steps of raw material mixing, pyrolysis and finished product preparation. The crop straw, orthophosphate and lead-copper tailings are uniformly mixed in proportion and then pyrolyzed, the content of sulfur in the lead-copper tailings can be reducedin the pyrolysis process, and the pyrolysis product is phosphorus-modified biochar and has the advantage of high heavy metal adsorption capacity; bottom mud or sludge is added into a pyrolysis product to prepare viscous artificial soil, and the bottom mud or sludge plays a role in coagulating soil particles to form an anti-scouring carrier, so that a good aggregate structure is favorably formed.

The present invention relates to an intelligent warehousing logistics management system and equipment based on a 4G Internet of Things platform, relates to a warehousing logistics management system and equipment, and includes a perception layer and a transmission level application layer established in the intelligent warehousing logistics management system, and is characterized in that: In the intelligent warehousing and logistics management system, equipment and goods, 4G technology and Internet of Things technology are integrated, RFID, two-dimensional code, bar code sensing components and Internet of Things chips are implanted, and there is a real-time remote data collection and processing system, The monitoring system, operating system and equipment, with individual identification and data sharing, can realize the connection of objects, form a new warehouse logistics management system and equipment, and realize real-time, accurate, efficient and high-quality modern warehouse management system and logistics system. Through resource integration, the present invention improves management efficiency, reduces management cost, and can realize one person controlling multiple devices, even intelligent control.

The invention discloses a method and system for realizing the automatic test of Ethernet bus data. The method comprises the following steps: according to the needs of an Ethernet bus data test, selecting a test sequence, wherein the test sequence comprises a plurality of component modules, each component module is used to complete a test action of Ethernet bus data, the component modules in the test sequence establish a connection relationship with each other according to the sequence of test actions, and control parameters of each component module are set in the test sequence; checking whether a connection is established with a to-be-tested device; if the connection is established, performing the test, wherein in the process of test, the to-be-tested device is automatically tested according to the sequence of each component module of the test sequence and the control parameters of each component module; and after the test is completed, automatically saving and displaying test results,and generating a test report. The method and the system provided by the present invention convert a manual operation process into a task sequence, thereby reducing skill requirements of a user and improving the test efficiency.

The invention discloses a thermal gas flow circulating type winnowed coal humidifying process for indirectly utilizing waste gas of a coke oven flue. The process is mainly carried out in a full-boiling windowing drying fluidized bed and a hot waste gas waste heat utilizing system, wherein the hot waste gas waste heat utilizing system comprises a hot gas closed circulating system and a waste heat recycling system. Firstly, the waste heat recycling system utilizes high-temperature hot water converted by utilizing the waste heat of the coke oven flue gas, and supplies heat to the hot gas closed circulating system, wherein a heat-absorbed high-temperature gas medium is conveyed to a segmented air chamber of a fluidized bed; meanwhile, particle materials enter an accommodating cavity of the fluidized bed through a charging end, the high-temperature gas medium penetrates through an air distributing plate to carry out windowing, classifying and drying onto the particle materials, enters a hot gas recycling pipeline of the hot gas closed circulating system through a waste gas collecting and processing system of the fluidized bed, and reflows to a water-gas hot tube heat exchanger, and that cycle repeats. The invention disclosed by the invention is reasonable in flow, sufficient in resource utilization, energy-saving, environment-friendly, and obvious in comprehensive benefits.

The invention discloses a liquid cooling system utilizing condensation heat to be self-adaptive to refrigerating capacity, and the system comprises a refrigerating system and a cooling liquid circulating system; the refrigerating system comprises a compressor, a condenser, an expansion valve and an evaporator, which are sequentially and circularly connected with one another, and the evaporator is provided with a liquid return inlet and a liquid return outlet; the cooling liquid circulating system comprises a solution tank which is connected with the liquid return outlet of the evaporator, and the liquid return inlet of the evaporator and an outlet of the solution tank are respectively connected with a user side; and an air outlet of the compressor is connected with an air distributing valve, a liquid inlet of the expansion valve is connected with a liquid inlet valve, a heat exchanger is arranged inside the solution tank, the air distribution valve is connected with an inlet of the heat exchanger, and the liquid inlet valve is connected with an outlet of the heat exchanger. The condensation heat discharged by the compressor is used for heating solution inside the solution tank, simultaneously the low-temperature liquid refrigerant after the heat exchanging and the normal-temperature high-pressure liquid refrigerant discharged by the condenser enter the evaporator to exchange heat and evaporate. By controlling the flow situation of the refrigerant and the solution, the supplementary cooling amount of the solution inside the solution tank can be controlled.

The invention discloses an adipose-derived stem cell separation culture method comprising the following steps of: separating and acquiring from adipose tissues; and culturing SVF (Stromal-vascular fraction) cells. The separation culture method is characterized by also comprising the following steps of: removing Lin+cells included in the SVF cells to obtain an Lin-cell mass by using a magnetic-activated cell sorting method; gathering CD271+Sca-1+cells from the obtained Lin-cell mass to obtain the adipose-derived stem cells by using a fluorescent-activated cell sorting method; and culturing theobtained adipose-derived stem cells by using a culture medium containing LIF (Leukemia Inhibitory Factor) and FGF2 (Fibroblast Growth Factor). The invention can efficiently and fast obtain the high-purity adipose-derived stem cells by combining FACS (Fluorescent-Activated Cell Sorting) with MACS (Magnetic-Activated Cell Sorting), wherein the high-purity adipose-derived stem cells have higher clone forming ability, self-renewal ability and multi-directional differentiation potentiality; P16 generation adipose-derived stem cells obtained by the separation culture method still have higher adipose forming ability and bone forming ability; in addition, the invention provides a new method for acquiring a large quantity of seed cells with dryness in vitro to apply to tissue regeneration.

The invention relates to a method and a device for synchronizing entries. The device is positioned in a union main station and comprises a receiving device, a monitoring device, an analyzing device and a processing device. The method for synchronizing entries comprises the following steps of: forming a union relation by using the union main station as a center and rounding a plurality of union member stations, wherein entry data can be shared in the union, and basic data of all the union member stations are shared from the union main station; and supplementing and editing the basic data by all the union member stations to generate new contents. In the invention, the entries of the union main station in the center are continuously updated and enriched through the entry synchronizing method of the union, meanwhile, the member stations are also helped in the data sharing mechanism of the union.

It is intended to provide fermented soybean milk in which not only the greenish smell due to soybean or soybean milk but also unpleasant taste, fermentation smell, harsh taste and acetic acid smell generating in the course of the lactic acid fermentation and acetic acid fermentation of soybean milk are relieved. It is intended to provide fermented soybean milk in which the thick texture characteristic to processed soybean products is reduced. It is intended to provide fermented soybean milk having a light and refreshing taste. By using palatinose, it becomes possible to produce fermented soybean milk having reduced thick texture of soybean and a light and refreshing taste. Moreover, the unpleasant smell of fermented soybean milk, which cannot be relieved even by using various taste-improving agents, etc., can be relieved thereby.

The invention discloses a real-time address book system and relates to a computer management system. The computer management system comprises a system administrator module; the system administrator module comprises a password changing unit, a user administrating unit, a linkman type administrating unit, a message administrating unit and a system notice unit. The user administrating unit comprises a user list module and a user inquiry module. The real-time address book system can be constantly stored in a network server, and detailed information of linkmen is recorded in the real-time address book system so as to facilitate finding and calling the information of the linkmen. The real-time address book system can be used for searching, updating and storing an address book at any time and any place through connecting with the Internet through the networking function of a mobile phone. The real-time address book system is available, easy and quick to operate, precise, safe, reliable, high in operation efficiency, and easy to maintain.

The invention provides a self-cleaning multifunctional mop and belongs to the field of cleaning products. The invention specifically provides a multi-purpose mop having a hand wash-free function. The self-cleaning multifunctional mop truly solves the problem of single functions of mops and solves the problem that a mop can only use mop cloths or a collodion head and is incapable of switching of the mop cloths and the collodion head. The self-cleaning multifunctional mop comprises a mop rod, a mop plate, a water squeezing component and a mop connector. The front side of the mop plate is provided with a wiping medium for mopping; the two sides of the mop plate are provided with a brush and a water-scraping soft rubber strip. The mop connector is uniquely designed to consist of a lower connector, an upper connector and a plug pin, wherein the upper connector and the lower connector can be located as required so that the rotating angle of the mop is controlled. The self-cleaning multifunctional mop truly integrates the functions of sweeping, mopping, water scraping and self-cleaning, so that the functions of the mop are extended; the mop is convenient and flexible to use, low in manufacture cost, and is firm and durable.

The invention provides a block chain data transaction method with privacy protection, and relates to the technical field of block chains. The seller user participates in the transaction and stores original data into an interstellar file system after performing public key inner product encryption on the original data, and initiates a transaction request for creating a seller smart contract in a block chain; then the buyer user initiates a transaction request for creating a buyer smart contract in the block chain; the consensus nodes on the block chain perform validity check on the transaction requests initiated by the transaction participating users; if the check is passed, all the consensus nodes on the block chain record the transaction requests in the chain, and the seller user and the buyer user perform data transaction based on the block chain; and if the check is invalid, the transaction application is rejected. The method is based on the block chain, the traceability of the data transaction process is guaranteed, and the rights and interests of buyers and sellers are guaranteed. Meanwhile, the data transaction process is encrypted by using a secret key, so that the transaction platform is ensured not to check and store easy-to-check data.

The invention discloses a transmission frequency determination method and device and communication equipment, and relates to the technical field of communication. The method is executed by a first communication device, and comprises the following steps: acquiring at least one of an environmental factor and channel measurement information; and determining a first transmission frequency resource according to at least one of the environmental factor and the channel measurement information. According to the scheme, the problem that the available transmission frequency cannot be determined through transmission can be solved.