Bit and power allocation method for fast optimizing OFDM system

A bit and power allocation method for fast optimizing OFDM system relates to the wireless communication field. The method solves the problem that system optimization time is long as the allocation complexity is high in the existing bit and power allocation method. The method includes that: bit and power of N subcarriers in an OFDM system are initialized; power increment required by increasing message of one bit of each subcarrier in the N subcarriers is calculated; RT/6 subcarriers with less power increment are found and 2 bits are allocated to each subcarrier; bit number to be allocated RT is updated and allocation is continued until bit allocation is completed, and then power allocation is carried out. The invention is applicable to bit allocation and transmitting power optimization.

Motor output shaft runout measuring instrument

The utility model relates to the field of detection devices, in particular to a motor output shaft runout measuring instrument. The device comprises a workbench, a clamping assembly is arranged at thetop end of the surface of the workbench, and a measuring assembly is arranged below the surface of the workbench; the clamping assembly comprises a rotary pressing air cylinder, a clamping rod and anadjusting bolt. The driving end of the rotary pressing air cylinder is connected with the clamping rod, and an adjusting bolt is arranged at the clamping end of the clamping rod; a socket for inserting an output shaft of the motor is formed in the surface of the workbench; when a tested motor is clamped, the tested motor only needs to be placed at a clamping position on the top surface of the workbench, the rotary pressing cylinder is started to rotate the clamping rod to the clamping position, and then the tested motor is fixed by pressing down the adjusting bolt.

Binary phase-shift keying/orthogonal frequency division multiplexing system based on Haar wavelet transformation

The invention relates to a wireless communication system, in particular to a binary phase-shift keying/orthogonal frequency division multiplexing system based on Haar wavelet transformation. To a certThe invention relates to a wireless communication system, in particular to a binary phase-shift keying/orthogonal frequency division multiplexing system based on Haar wavelet transformation. To a certain extent, the invention overcomes the defects of the prior OFDM system which has a higher peak to average power ratio and is greatly influenced by frequency offset. The invention comprises a launchiain extent, the invention overcomes the defects of the prior OFDM system which has a higher peak to average power ratio and is greatly influenced by frequency offset. The invention comprises a launching process: an input signal is converted by a first serial-parallel conversion module and input to a BPSK data modulator to be modulated; the modulated signal passes through a Haar wavelet forward trang ...

Spectrum sensing data processing method based on discrete Fourier transformation

The invention relates to a spectrum sensing data processing method based on discrete Fourier transformation. The spectrum sensing data processing method based on the discrete Fourier transformation specifically comprises the steps that band-pass filtering is carried out on received signals; down-conversion is carried out on band-pass signals; low-pass filtering is carried out on demodulated signals; A/D conversion is carried out on the signals; minimum sampling frequency is given according to frequency-domain characteristics of the signals, and fast Fourier transformation is carried out on the signals; lastly, obtained discrete data are screened, and only discrete Fourier transformation coefficients capable of reflecting the real conditions of all information channels are reserved. According to the spectrum sensing data processing method based on the discrete Fourier transformation, the sampling process of the fast Fourier transformation and a method for extracting wireless spectrum characteristics ...

Home appliance recovery vehicle path planning method based on improved genetic algorithm

The invention discloses a household appliance recovery vehicle path planning method based on an improved genetic algorithm. The method comprises the following steps: firstly, modeling a household appliance recovery vehicle path planning problem into a mathematical model taking the minimum transportation cost as an optimization target; and then, solving by using an improved genetic algorithm based on a Gaussian matrix mutation operator. According to the algorithm, a Gaussian probability matrix is established by means of site sequence distribution characteristics implied in original site data information, then an initial population is generated, individual fitness is calculated, selection, crossover and mutation operations are carried out, and iterative optimization is continuously carried out until a stop condition is met. In the mutation operation, a Gaussian matrix mutation operator acts on individual gene mutation, and the population is guided to evolve towards a high-fitness direction ...

Waste household appliance value evaluation system based on classification selection enhanced prediction model

The invention relates to the technical field of waste household appliance recovery, and provides a waste household appliance value evaluation system based on a classification selection enhanced prediction model, which comprises a data preprocessing module, a model training module and a value estimation output module. According to the method, a classification selection enhanced prediction model is adopted, so that the value of the waste household appliances can be evaluated and predicted more accurately; according to the invention, an artificial intelligence technology is adopted, so that automatic treatment of waste household appliances is realized; according to the method, factors such as recovery cost, function conditions and use time of the waste household appliances are comprehensively considered, and the value of the waste household appliances is evaluated and predicted; the method can be applied to various types of waste household appliances, and can also be applied to value evaluation ...

Storing box door

The invention discloses a storing box door, comprising a door leaf body; a ceramics painting decorated board is arranged on the door leaf body. Because the ceramics raw material used in the ceramics decorated board is made by high temperature burning, a painting which is baked on the decorated board has high strength and hardness, good anti aging property, non-fading and non-falling and long service life.

Cinerary casket storage rack capable of storing remains

The invention relates to a storage rack, in particular to a cinerary casket storage rack capable of storing remains. The technical problem to be solved is to provide the cinerary casket storage rack capable of storing the remains, which can place the remains in a classified manner and is convenient to take. According to the technical scheme, the cinerary casket storage rack capable of storing the remains comprises a cinerary casket rack body, a remains collecting frame, a placement mechanism and storage mechanisms, the lower portion of the cinerary casket rack body is connected with the remains collecting frame in a sliding mode, the placement mechanism is arranged in the remains collecting frame, and the storage mechanisms are arranged on the left side and the right side in the remains collecting frame. The swing plate is driven to be unfolded or folded through the gear meshing effect, so that the rotating plate is driven to be closed or opened, when people store or take relics, clothes ...

Fibre friction coefficient test device

The utility model relates to a fibre friction coefficient test device. This testing arrangement includes friction roller, couple, first tension clamp, second tension clamp, a step motor, force transducer, amplifier, a pulse distributor, computer and input/output equipment. The friction roller can be carried out through above -mentioned structure and the friction of test fibre is rotated. This testing arrangement can further include the 2nd step motor, first gear, synchronous gear area, second gear, lead screw, spiral shell piece, go up limiter, lower limiter, the 2nd pulse distributor. Still can carry out the friction roller through this additional structure and go up and down to test the fibre friction. The utility model discloses the device has measuring accuracy height, advantage that efficiency of software testing is high to can show the undulant change curve of frictional force in real time, frictional force variation size among autoanalysis fibre coefficient of friction and the test ...

Rate adaptive feedback method based on Bayesian compressed sensing in MIMO system

The invention relates to a rate adaptive feedback method based on Bayesian compressed sensing in an MIMO system. The method comprises the steps of (1) using a vector autoregression model based on a time varying MIMO channel model in a compressed feedback mechanism, removing a relation between current channel feedback and previous channel feedback, only transmitting a forecast error, and meanwhile compressing spatial redundancy existing in current channel vectors through compressed sensing; (2) deriving the relation between the feedback rate and distortion, and using a Bayesian compressed sensing model in compressed sensing recovery for deducing a rate-distortion function, wherein the feedback rate reflects previous feedback requirements and the bandwidth of the previous feedback channel; (3) deriving a closed form of the feedback distortion and traversal downlink capacity relation. Compared with the prior art, the method has the advantages that the feedback distortion of a sub-channel matrix ...

Image testing method for fabric dynamic and static drapability and testing apparatus thereof

Fiber linear density strength elongation simultaneous test system and test method

The invention relates to a fiber linear density strength elongation simultaneous test system and test method. The fiber linear density strength and elongation simultaneous test system comprises a linear density test unit, a strength elongation test unit and a mechanical hand, wherein the linear density test unit is provided with an upper positioning plate and a lower positioning plate; the strength elongation test unit is provided with an upper clamping device and a lower clamping device; the mechanical hand is arranged between the linear density test unit and the strength elongation test unit and comprises a rotating arm driven by a motor, the front end of the rotating arm is provided with a clamping device, and the clamping device can move to be above the upper positioning plate of the liner density test unit and above the upper clamping device of the strength elongation test unit by virtue of the rotation of the rotating arm; the strength elongation test unit is provided with an electromagnetic ...

Cinerary casket rack with self-cleaning function

The invention relates to the technical field of cinerary casket storage, in particular to a cinerary casket rack with a self-cleaning function. According to the cinerary casket frame with the self-cleaning function, the cinerary casket can be lifted up to remove ash cleaning dead corners. A cinerary casket frame with a self-cleaning function comprises a frame body and material placing plates, the material placing plates are installed on the left lower side and the right lower side in the frame body, the cinerary casket frame further comprises a lifting mechanism and a dust removing mechanism, the lifting mechanism is arranged in the frame body, a cinerary casket is placed on the material placing plates and the lifting mechanism, the lifting mechanism is used for driving the cinerary casket to be lifted, and the dust removing mechanism is used for removing dust from the cinerary casket. And a dust removing mechanism for automatically cleaning dust on the material placing plate is arranged ...

Method based on cause-and-effect relation of variables for diagnosing failures in process industry

The invention discloses a method based on the cause-and-effect relation of variables for diagnosing failures in the process industry. The method comprises the following steps: a human-computer interaction module inputs the description equations and type of the production process into a system; a variable cause-and-effect relation generating module generates a process variable cause-and-effect relation model according to the inputted equations and variables of the system, generates the failure matching rules on the basis of the process variable cause-and-effect relation model and stores the rules in a failure rule library in a relational database form; a variable state information acquisition module extracts the variable state information in a production process DCS (distributed control system) or a production monitoring real-time database, calculates the variable qualitative state discriminant parameter and sends the calculation result to a failure searching module; and the failure searching ...

Microwave device surface processing device capable of restraining secondary electron emission and microwave device surface processing method capable of restraining secondary electron emission

The invention provides a microwave device surface processing device capable of restraining secondary electron emission and a microwave device surface processing method capable of restraining secondary electron emission. The device consists of a laser output module, a micro lens, a movable table and a control module, wherein the control module outputs control signals to the laser output module and the movable table, so as to control the laser output power, the laser output interval time, the movement distance of the movable table and the movement time of the movable table; by virtue of a small-area deep hole array continuous moving and filling method, laser etching of a centimeter-scale large-area deep hole array structure on the surface of a microwave device is finished. The microwave device surface structure processed by the device and the method is of a rectangular uniformly-spaced or triangular uniformly-spaced micronano deep hole array, so that the secondary electron emission coefficient ...

Game device positioning method

The invention discloses a positioning method for a game device, which is applied to a game system. The positioning method is as follows: a positioning hose in the game system sends out a positioning signal and starts timing; a wireless controller in the game system sends out an ultrasonic signal after receiving the positioning signal; the positioning host stops timing after receiving the ultrasonic signal and computes out transfer time of the ultrasonic wave; the positioning host transmits the transfer time of the ultrasonic wave to a computing host in the game system; the computing host computes out the distance between the wireless controller and the positioning host according to the transfer time of the ultrasonic wave; and the computing host computes the position of the wireless controller according to the distance. Therefore, the positioning method for the game device has the advantages of simple operation, low requirement on hardware, little environmental interference, and the like ...

Temperature-controllable all-dimensional vulva cleaning device and vulva cleaning method

The invention relates to a temperature-controllable all-dimensional vulva cleaning device and a vulva cleaning method.The device comprises a vulva cleaning box, an isolation pad, a water pipe, a foot pad, a spray-washing gun, an angle adjusting unit, a rotary driving unit, a heating unit and an MCU controller which are connected with one another. Compared with the prior art, the vulva cleaning box is provided with a saddle-shaped face, the saddle-shaped face is provided with a cleaning window, and the cleaning window is arranged on the saddle-shaped face; the pudendum can extend into the pudendum cleaning device, so that the comfort of the pudendum can be ensured, and a to-be-cleaned area of the pudendum is separated from hip muscles; the running state of the motor and the pitching angle of the spray-washing gun are automatically controlled through the MCU controller, then the spray-washing gun can be controlled to conduct 360-degree dead-corner-free water spraying washing on all parts ...

Design method for optimal antenna structure in multi-user MIMO system based on random matrix

The invention relates to a design method for an optimal antenna structure in a multi-user MIMO system based on a random matrix. The design method includes the following steps of (1), calculating the available traversal downstream capacity of the multi-user MIMO system, (2), analyzing the influence on the downstream capacity from antenna structures according to the traversal downstream capacity, and (3), obtaining the optimal antenna structure according to the analysis result of the step (2). Compared with the prior art, the design method has the advantage that the largest traversal downstream capacity is obtained within a certain limited area.

Multi-layer spaced cinerary casket storage rack with fireproof function

The invention relates to the technical field of cinerary casket storage, in particular to a multi-layer spaced cinerary casket storage rack with a fireproof function. According to the multi-layer spaced cinerary casket storage rack with the fireproof function, fire prevention can be conducted on the cinerary casket without moving the cinerary casket, and fire prevention is conducted through the flame-retardant cloth easy to fold. A multi-layer spaced cinerary casket storage rack with a fireproof function comprises a main outer frame, supporting frames and the like, the supporting frames used for containing cinerary caskets are installed on the upper portion, the middle portion and the lower portion of the left side and the right side of the main outer frame, and the cinerary caskets placed on the supporting frames are distributed in a multi-layer spaced mode. When the meltable solid is heated and melted, the torsion spring resets to enable the protection shell to rotate inwards, the protection ...

Bit and power allocation method for fast optimizing OFDM system

A bit and power allocation method for fast optimizing OFDM system relates to the wireless communication field. The method solves the problem that system optimization time is long as the allocation complexity is high in the existing bit and power allocation method. The method includes that: bit and power of N subcarriers in an OFDM system are initialized; power increment required by increasing message of one bit of each subcarrier in the N subcarriers is calculated; RT/6 subcarriers with less power increment are found and 2 bits are allocated to each subcarrier; bit number to be allocated RT is updated and allocation is continued until bit allocation is completed, and then power allocation is carried out. The invention is applicable to bit allocation and transmitting power optimization.

Fiber friction coefficient testing device and testing method thereof

The invention relates to a fiber friction coefficient testing device and a testing method thereof. The fiber friction coefficient testing device comprises a friction roller, a hook, a first tension clamp, a second tension clamp, a first stepping motor, a force sensor, an amplifier, a first pulse distributor, a computer and input-output equipment; the structure can be used for testing the fiber friction of the friction roller in a rotating manner; the testing device further comprises a second stepping motor, a first gear, a synchronous toothed belt, a second gear, a screw rod, a screwed block, an upper limiter, a lower limiter and a second pulse distributor. The additional structure can be used for testing the fiber friction of the friction roller in a lifting manner. According to the testing device and the testing method, the testing precision is high, the testing efficiency is high, the fluctuation changing curve of frication force can be displayed in real time, the fiber friction coefficient ...

Method for controlling ring current and reactive power of parallel matrix converter

The invention relates to the technical field of power converters, in particular to a method for controlling ring current and reactive power of a parallel matrix converter. According to a scheme in the invention, the method comprises the following steps: forming an offline lookup table by establishing fitting coefficients of the matrix converter in different operation states, calculating a reference ring current meeting the input reactive power requirement of the matrix converter and a reference input reactive current of each converter according to the offline lookup table, decomposing an actual output current of the matrix converter to generate an actual ring current, performing closed-loop control on the actual ring current, calculating a reference output voltage of each converter according to a differential mode voltage, modulating each converter according to the reference input reactive current and the reference output voltage, and controlling the on/off state of each converter. The ...

Cinerary casket storage rack convenient for high-altitude storage

The invention relates to the technical field of cinerary casket storage racks, in particular to a cinerary casket storage rack convenient to store at a high position. The invention provides the cinerary casket storage rack capable of automatically pushing the cinerary caskets and facilitating high-position storage of the cinerary caskets. A cinerary casket storage rack convenient to store at a high position comprises a supporting seat, a storage rack and a cinerary casket, the storage rack is connected in the supporting seat, the cinerary casket is placed on the left side of the upper portion in the storage rack, the cinerary casket storage rack further comprises a lifting mechanism and a displacement mechanism, and the lifting mechanism used for driving the cinerary casket to move is arranged on the upper side of the storage rack. And a displacement mechanism for pushing the cinerary casket is arranged on the lifting mechanism. A second servo motor is started by people, so that an output ...

Vector-auto-regression-based Bayes compressed sensing feedback method in MIMO system

The invention relates to a vector-auto-regression-based Bayes compressed sensing feedback method in an MIMO system. The vector-auto-regression-based Bayes compressed sensing feedback method includes the following steps: (1) building an MIMO channel model, (2) building a VAR model to achieve channel prediction, and (3) reducing the feedback speed through Bayes compressed sensing. Compared with the prior art, the vector-auto-regression-based Bayes compressed sensing feedback method has the advantages that the relation between adjacent CSIs is described by introducing the VAR model, space-time compression is introduced to reduce the size range of a channel, and the dimensionality of channel vectors is reduced.

Game device positioning method

The invention discloses a positioning method for a game device, which is applied to a game system. The positioning method is as follows: a positioning hose in the game system sends out a positioning signal and starts timing; a wireless controller in the game system sends out an ultrasonic signal after receiving the positioning signal; the positioning host stops timing after receiving the ultrasonic signal and computes out transfer time of the ultrasonic wave; the positioning host transmits the transfer time of the ultrasonic wave to a computing host in the game system; the computing host computes out the distance between the wireless controller and the positioning host according to the transfer time of the ultrasonic wave; and the computing host computes the position of the wireless controller according to the distance. Therefore, the positioning method for the game device has the advantages of simple operation, low requirement on hardware, little environmental interference, and the like ...

Multi-user user selection method based on matrix condition number in multiple input multiple output (MIMO) system

The invention relates to a multi-user user selection method based on a matrix condition number in a multiple input multiple output (MIMO) system. The method includes the following steps that S1 precoding is conducted on an original symbol in a precoding matrix to obtain a transmission symbol; S2 a transmitting end receives information channel vector fed back by a user and improves an algorithm by utilizing semi-orthogonality based on the matrix condition number to conduct user selection, each iteration selects a user index, the user index meets the condition that the norm squared value of the information channel vector F is the largest or the matrix condition number is the smallest to obtain the user set with best performance to form a radio frequency link and transmit the transmission symbol. Compared with the prior art, the method has the advantages of transmitting end equipower distribution, limited dynamic change range and capability in hardware pressure reduction. The method is better ...

Feedback device of tilt angle state of satellite-borne microwave switch

The invention discloses a feedback device of a tilt angle state of a satellite-borne microwave switch. The feedback device comprises a shell, a feedback movement assembly, a circuit board assembly and an upper cover, wherein the upper cover is used for fixing the circuit board assembly and the feedback movement assembly in the shell, and the circuit board assembly is arranged on the inner wall of the shell; the feedback movement assembly is composed of a tilt angle rotor and inching switches, the tilt angle rotor is arranged on a center hole formed in the bottom of the shell, and a shaft end of the tilt angle rotor is connected with a swinging shaft of the satellite-borne microwave switch; when the swinging shaft of the satellite-borne microwave switch swings, the tilt angle rotor synchronously swings and can drive the inching switches to move, the connection and disconnection of a feedback circuit are realized, and a tilt angle movement state is output. The device provided by the invention ...

Moving target tracking method based on intelligent reflecting surface

The invention provides a moving target tracking method based on an intelligent reflecting surface, and the method comprises the steps: constructing a motion state evolution linear model of a target through the motion track information of the moving target, and obtaining the prediction of the motion state; secondly, based on a single-antenna transmitting and receiving system model, constructing a signal receiving model containing multiple sampling signals, time delay and Doppler frequency offset at the current moment; based on the received signal at the current moment, processing the nonlinear received signal by using extended Kalman filtering or particle filtering, and estimating target state information at the current moment; and finally, according to the current state estimation and state evolution model of the extended Kalman filter/particle filter, predicting the state information at the next moment and regulating and controlling the phase of the intelligent reflecting surface in advance ...

Intelligent spectrum sensing method based on hierarchical Dirichlet process

The invention relates to a distributed cooperative spectrum sensing method based on a hierarchical Dirichlet process. The method specifically comprises the following steps: first, sensory data of secondary users is automatically grouped by making use of the statistical characteristics of the sensory data; and then, data fusion is carried out in each group so as to unearth heterogeneous spectrums in the network. In addition, a simple and efficient distributed information exchange scheme, namely, intra-cluster information exchange and inter-cluster information exchange, is put forward for the implementation of the spectrum sensing method, and the most concise information needing to be exchanged is given.

Breaking depth map correction system with time sequence smoothness

An image simulation system comprises an image acquisition circuit, a memory and a processor. The image capturing circuit is used for capturing an image. The memory is used for storing a plurality of instructions and a fragmentation depth map. The processor is connected with the image acquisition circuit and accesses a plurality of instructions to perform the following operations: generating a four-connected graph and a classification parameter according to the image, the classification parameter being related to a background and a foreground in the image; adjusting the four-way graph according to the classification parameter, and generating a guide mask according to the adjusted four-way graph, the guide mask being used for indicating a background and a foreground in the image; and generating a special effect image according to the image, the guide mask and the fragmentation depth map, wherein the special effect image is used for simulating weather corresponding to the fragmentation depth ...

Automatic memory control method and automatic memory system thereof

The invention discloses an automatic memory control method and an automatic memory system thereof, which has simple control method, is easy to be executed, and can automatically identify and control the access and avoids the access error. The automatic memory control method comprises the following steps of: automatically identifying an electronic card by a control system and a card reader, thus realizing automatic memory control of the memory system. The automatic memory system comprises a memory frame which consists of memory boxes with electronic locks and is provided with a speech and caption prompter, and the control system consisting of a local area network exchanger, a computer, a controller and the card reader that are connected with each other; and the electronic lock and the speech and caption prompter are connected with the controller.

UWB positioning shielding detection method in intelligent factory

The invention provides a UWB positioning occlusion detection method in an intelligent factory, and the method comprises the steps: deducing an error expression under an occlusion condition through an error solving method, and judging the occlusion based on the distance measurement error of each path; secondly, calculating the volume of each error tetrahedron by using a method of forming an error tetrahedron volume by every four base stations under the condition that each path error solving equation has no solution; and finally, setting a shielding error and an error tetrahedron volume threshold value, and carrying out combined shielding detection by combining the two methods. On the basis of solving a TOA positioning linear equation based on the least square method, formula derivation is carried out by assuming the shielding condition, the error influence on the corresponding path can be solved according to the distance measurement data, the error influence of each path can be accurately ...

Method for realizing maximum reactive power control capability of matrix converter

The invention discloses a method for realizing the maximum reactive power control capability of a matrix converter. The method comprises the following steps of: respectively decomposing reference input current and output current into an active component and a reactive component according to input and output voltage vector orientation; synthesizing reference output voltage through the input voltage, wherein such process represents that output active current is synthesized into reference input active current in a voltage orientation mode, the reference input reactive current is synthesized through the output active current and the reactive current respectively, and the output current directly participates in a matrix converter modulation algorithm; and finally, selecting different input and output basic vectors to form all the combinations of two peer-to-peer control processes, comparing the maximum reactive power control capability of each combination, and selecting the combination with ...

Alternating current-alternating current converter current closed-loop control method based on maximum and minimum phase waveform similarity

The invention discloses an AC-AC converter current closed-loop control method based on maximum and minimum phase waveform similarity, and belongs to the technical field of converter control. According to the principle that maximum and minimum phase voltages and phase currents are similar in waveform when three-phase power grid current is sinusoidal, the current-voltage ratios of the maximum and minimum phases are calculated in six sectors respectively; the ratio calculated by the controller is used for adjustment; calculating correction current according to a current flow direction relation of an active filter in the AC-AC converter topology, and further performing compensation correction on reference current of a phase corresponding to a voltage intermediate value of the active filter; and finally, realizing closed-loop control of the injection current required by the active filter based on the actual injection current of the phase corresponding to the voltage intermediate value of the ...

Medical suture friction performance testing apparatus and testing method thereof

The invention relates to a medical suture friction testing apparatus. The apparatus comprises an assembly for testing the friction performance of a medical suture when the medical suture penetrates tissues, and an assembly for testing the friction performance between medical sutures. The assembly for testing the friction performance of a medical suture penetrating tissues stimulates the friction performance between the medical suture and all tissues when the medical suture penetrates human tissues, and the assembly for testing the friction performance between medical sutures stimulates the friction assembly between the medical sutures in the knotting process of the medical suture. The two assemblies can be arranged in a multifunctional fiber strength and elongation tester to replace a lower clamping head of the tester in order to carry out relevant friction performance test. The invention also discloses a corresponding medical suture friction testing method. The friction testing apparatus ...

Textile chroma and color difference testing device and testing method thereof

The invention relates to a textile chroma and color difference testing device and a testing method thereof. The testing device comprises a spectrophotometric sensor, a scattered illumination transform-type integral sphere, an LED combined light source, a sample carrying table, a correction black cavity, a correction whiteboard, and a testing frame, wherein the testing frame is driven by a driving mechanism; the correction whiteboard (or the correction black cavity), the correction black cavity (or the correction whiteboard) and the sample carrying table are sequentially arranged on the testing frame from inside to outside; the scattered illumination transform-type integral sphere is arranged above an advancing path of the testing frame; the scattered illumination transform-type integral sphere comprises a base with a sample testing hole, the base is provided with a diffuse reflection spherical shell, and the diffuse reflection spherical shell is internally provided with the LED combined ...

Method based on cause-and-effect relation of variables for diagnosing failures in process industry

The invention discloses a method based on the cause-and-effect relation of variables for diagnosing failures in the process industry. The method comprises the following steps: a human-computer interaction module inputs the description equations and type of the production process into a system; a variable cause-and-effect relation generating module generates a process variable cause-and-effect relation model according to the inputted equations and variables of the system, generates the failure matching rules on the basis of the process variable cause-and-effect relation model and stores the rules in a failure rule library in a relational database form; a variable state information acquisition module extracts the variable state information in a production process DCS (distributed control system) or a production monitoring real-time database, calculates the variable qualitative state discriminant parameter and sends the calculation result to a failure searching module; and the failure searching ...

Quick-release fastener structure

The invention provides a quick-release fastener structure. The quick-release fastener structure comprises a body part and a fastening part, the body part is used for being combined with a first object; the buckling part is movably combined with the body part, the buckling part is provided with a head part, a rod part with one end connected with the head part and a buckling part arranged at the other end of the rod part, and the buckling part is used for buckling in or separating from a second object. Therefore, the body part can be combined with the first object, and the buckling part is buckled with the second object or removed from the second object, so that the combination and separation of at least two objects are completed, and the effect of repeatedly and quickly combining and separating is achieved.

Binary phase-shift keying/orthogonal frequency division multiplexing system based on Haar wavelet transformation

The invention relates to a wireless communication system, in particular to a binary phase-shift keying/orthogonal frequency division multiplexing system based on Haar wavelet transformation. To a certain extent, the invention overcomes the defects of the prior OFDM system which has a higher peak to average power ratio and is greatly influenced by frequency offset. The invention comprises a launching process: an input signal is converted by a first serial-parallel conversion module and input to a BPSK data modulator to be modulated; the modulated signal passes through a Haar wavelet forward transform module and is input to an IFFT converter; and the signal converted by the IFFT converter is input to the first parallel-serial conversion module, converted by the parallel-serial conversion module, inserted in a circulating prefix and launched by a channel. The invention also comprises a receiving process: the received signal is converted by a second serial-parallel conversion module and transferred ...

Spaceborne microwave switch rotation angle feedback device

The invention discloses a spaceborne microwave switch rotation angle feedback device. The spaceborne microwave switch rotation angle feedback device comprises upper cover screws, an upper cover, a circuit board assembly, a magnetic induction assembly and a casing, wherein an inner wall of the casing is provided with two mounting bosses, the upper cover and the circuit board assembly are fixed on the mounting bosses of the casing through the upper cover screws, the magnetic induction assembly is mounted on a bottom center hole of the casing through a rotor shaft, a lower end of the rotor shaft extends out of the casing and is connected with a spaceborne microwave switch rotation shaft. When the spaceborne microwave switch rotation shaft rotates at a limited rotation angle, the magnetic induction assembly is driven through the rotor shaft to realize synchronous rotation, each tongue tube is driven through magnetic induction of the magnetic induction assembly to realize contact closing or ...