80results about How to "Low implementation requirements" patented technology

The invention discloses a multi-terminal flexible DC power grid line direction pilot protection method. The method comprises steps: DC current and voltage at two ends of a DC reactor are measured and a DC current mutation rate di / dt and a voltage mutation rate du / dt are calculated; when the di / dt or the du / dt is larger than a threshold value K1-set and K2-set, a protection algorithm is started instantly; fault voltage at two sides of a DC reactor at a protection terminal is measured, and corresponding transient components UM_line and UM_bus (UN_line and UN_bus) are extracted; r1=UM_line / UM_bus (r2=UN_line / UN_bus) is calculated, and a fault direction is judged: if r1>1+epsilon (r2>1+epsilon), epsilon is a reliable margin, positive direction fault is judged and a direction signal RM is equal to 1 (RN=1), or otherwise, reverse direction fault is judged, and a direction signal RM is equal to 0 (RN=0); when RM&RN=1, internal fault is judged; and when RM&RN=0, external fault is judged. The method of the invention has the advantages that data synchronization is not needed; a sampling rate is lowly required; the fault resistance withstanding ability is strong; influences from line distributed capacitance do not exist; engineering implementation is facilitated; and the hardware investment cost is reduced.

The invention relates to a refrigeration and freezing device and a drawer assembly thereof. The drawer assembly comprises a barrel body with the front side opened, a drawer capable of being inserted into the barrel body in a front-and-back push-and-pull manner and an electric control lock mechanism. The electric control lock mechanism is configured to be controllably switched to a locking state so as to lock the drawer to the barrel body or switched to an unlocking state so as to relieve locking on the drawer when the drawer is completely pushed into the barrel body. The electric control lock mechanism is provided with an unlocking button protruding and extending downwards, and the unlocking button is configured to be capable of enabling the electric control lock mechanism to be switched to the unlocking state from the locking state when pressed upwards. According to the refrigeration and freezing device and the drawer assembly thereof, the drawer and the barrel body can achieve automatic locking and unlocking, user operation is facilitated, and the drawer can still be unlocked when the electric control lock mechanism is powered off or breaks down.

The invention relates to a sucking pump assembly and a refrigerating and freezing device. The sucking pump assembly comprises a mounting bottom plate, a sealed box and a sucking pump, wherein a blocking part extending upwards is arranged on the rear portion of the upper surface of the mounting bottom plate; the front surface of the blocking part is sunken backwards to form a positioning sunken part; the sealed box is provided with an air inlet connecting pipe and an air outlet connecting pipe which communicate the inside and the outside of the sealed box; the air inlet connecting pipe, the air outlet connecting pipe and the sealed box are integrally molded and formed; a positioning protrusion part protruding backwards is arranged on the rear portion of the sealed box; the sealed box is located on the upper side of the mounting bottom plate; the positioning protrusion part is clamped into the positioning sunken part; the front portion of the sealed box is locked to the mounting bottom plate; the sucking pump is arranged in the sealed box in the mode that the axis of the sucking pump extends in the horizontal direction; an air inlet of the sucking pump is connected to the air inlet connecting pipe through a hose; and an air outlet of the sucking pump is connected to the air outlet connecting pipe through a hose. The sucking pump assembly is low in operation noise, the dismounting process of the sucking pump assembly in the refrigerating and freezing device is quite convenient, and the occupied height space is small.

The invention discloses a permanent magnet synchronous motor position sensorless control method, comprising a rotating speed stabilization ring for correcting voltage synthesizing vector speed and a voltage amplitude correction ring for realizing vector control. The permanent magnet synchronous motor position sensorless control method essentially solves the problem that the motor is easy to lose synchronization and collapse, brings forwards a novel control strategy algorithm for realizing vector control, and realizes the stable, reliable and efficient operation of the driving system of the permanent magnet synchronous motor.

The invention provides a method for generating waveforms in radio communication and in particular provides a method for generating waveforms of non-sinusoidal orthogonal bandpass signals in time domain. The method has the beneficial effects of simple hardware structure and low implementation cost. The method can generate the waveforms, with in-band energy concentration the same as that of the prolate spheroidal wave function (PSWF) of baseband, of the orthogonal bandpass signals in time domain in any frequency range, ensures the number of the orthogonal waveforms to double that of the original PSWF waveforms and can be used for improving the frequency band use ratios and the power use ratios of the radio communication systems. The generation method is characterized by determining the parameters according to the spectrum mapping relation and the sampling theorem, solving the numerical solution of PSWF of baseband by the numerical solution method, converting the signals to the analog signal waveforms through analog-to-digital conversion and low-pass filtering and carrying out time domain multiplication on the analog signal waveforms and the same frequency orthogonal sine / cosine functions with phase difference shown in the specification respectively, thereby obtaining the orthogonal waveforms.

The invention relates to a refrigerating and freezing device and a drawer assembly thereof. The drawer assembly comprises a barrel with an open front side, a drawer and two sliding rail assemblies. The drawer can be inserted into the barrel in a front-back push-pull manner, and the sliding rail assemblies are arranged at the two transverse ends in the barrel. Each sliding rail assembly comprises an outer rail, and the outer rail is fixed into the barrel in the manner of extending in the front-back direction. An inner rail is arranged on the outer rail in the manner of sliding in the front-back direction and is supported by the outer rail and fixed to the drawer. A lock disc is hinged to the rear end of the outer rail in the manner of rotating around a transverse axis, and a front clamping column and a rear clamping column protruding in the transverse direction are arranged on the lock disc. A clamping head is arranged at the rear end of the inner rail and provided with a protruding part protruding upwards or downwards. In the process of pushing the drawer into the barrel, the rear end of the protruding part abuts against the rear clamping column to push the lock disc to rotate to enable the front clamping column to be attached to the front side of the protruding part, so that the inner rail and the drawer are locked. An elastic element is configured to apply resisting torque to the lock disc when the protruding part pushes the lock disc to rotate, and when the front clamping column is attached to the front side of the protruding part, torque in the direction opposite to the direction of the resisting torque is applied to the lock disc.

The embodiment of the application provides a positioning device, a positioning method, and an electronic device. The positioning device comprises an inertia detection signal generation unit, a distance difference calculation unit, and a fusion calculation unit. The inertia detection signal generation unit is used for generating an inertia detection signal associated with movement of a to-be-localized body. The distance difference calculation unit is used for calculating a difference of distances between the to-be-localized body at a known position and a same transmitting terminal and between the to-be-localized body at a current position and a same transmitting terminal on a line-of-sight condition; and the transmitting terminal is fixed. The fusion calculation unit is used for calculating the information of the current position based on the distance difference, the inertia detection signal, and the information of the known position. Therefore, the positioning accuracy is improved and the realization requirement is reduced.

The invention relates to a drawer module and a refrigerating and freezing device with the drawer module. The drawer module comprises a cylinder and a controlled atmosphere membrane module, wherein drawer space is limited in the cylinder; an accommodating cavity is limited in the top wall of the cylinder, and is communicated with the drawer space; the controlled atmosphere membrane module is mounted in the accommodating cavity, and has a controlled atmosphere membrane and an oxygen-enriched gas collecting cavity; and the controlled atmosphere membrane module is configured to enable more oxygen in the accommodating cavity to enter the oxygen-enriched gas collecting cavity through the controlled atmosphere membrane compared with nitrogen in the accommodating cavity. The drawer module can form rich nitrogen and lean oxygen in the drawer space to facilitate a gas atmosphere for food preservation, reduces the aerobic respiration strength of fruits and vegetables, and meanwhile, guarantees basic breathing effect to prevent anaerobic respiration of the fruits and the vegetables so as to achieve the purpose of long-time preservation of the fruits and the vegetables. The drawer module occupies no storage space, and can prevent collision from damaging the controlled atmosphere membrane module.

The invention relates to a refrigerating and freezing device and a drawer assembly thereof. The drawer assembly comprises a tank with the front side open, a drawer capable of being inserted into the tank in a front-back push-pull mode, an electronic control lock mechanism arranged on the rear side of the outer portion of the tank and an unlocking lead, wherein the electronic control lock mechanism can be controlled to be switched to a locking state so as to lock the drawer to the tank wen the drawer is pushed into the tank completely or switched to an unlocking state so as to unlock the drawer; the unlocking lead extends from the front end of the tank to the electronic control lock mechanism along the outer surface of the tank; the electronic control lock mechanism can be switched from the locking state to the unlocking state when the unlocking lead is pulled. According to the refrigerating and freezing device and the drawer assembly thereof, the drawer and the tank can be locked and unlocked automatically, a user can operate the drawer assembly conveniently, and the drawer can still be unlocked in case of outages or failures of the electronic control lock mechanism.

The invention provides a refrigerator and a drawer assembly thereof. The drawer assembly for the refrigerator comprises a box provided with a forward opening, a drawer arranged in the box in a front-back push-pull manner and provided with a front end plate used for sealing the forward opening, and a transmission cable assembly. The transmission cable assembly comprises a wiring rod and a spiral spring cable, wherein the front end of the wiring rod is fixedly connected to the rear surface of the front end plate and arranged in the front-back direction, the spiral spring cable is arranged on the wiring rod in a sleeving manner, the end portion of the spiral spring cable is fixedly connected to the front end plate so that electric power or signals can be transmitted to a power utilization component on the front end plate, and the spiral spring cable is arranged to be subjected to elastic and telescopic deformation along with front-back movement of the front end plate.

The invention discloses a microwave photon frequency measuring device based on technologies of compressed sampling and time domain broadening and a method thereof. A super-continuum spectrum optical source is broadened in time domain through a dispersive medium to achieve mapping from frequency to time. Microwave signals to be measured are modulated through a Mach del modulator on a carrier wave broadened in time domain. Modulated optical signals are further broadened through the dispersive medium so that the frequency of the microwave signals to be measured is reduced. A random bit sequence with +-1 is modulated on the broadened optical signals through the Mach del modulator, and observation data with information of the signals to be measured are obtained through photovoltaic conversion, a low pass filter and an electronic analogue-to-digital converter. The frequency spectrum of the original signals can be recovered through an existing compressed sampling recovery arithmetic. In an existing frequency technology based on the compressed sampling, the original signals are required to be modulated on a random bit sequence reaching Qwest frequency. The microwave photon frequency measuring device can reduce required frequency of the random bit sequence, and at the same time further reduces sampling frequency of the analogue-to-digital converter in the system so as to improver feasibility of the system.

The invention discloses a heart rate calculating method based on heart sound signal autocorrelation analysis. The method comprises the following steps: first, acquiring heart sound signals by utilizing a recording device; then, carrying out extracting on the heart sound signals, and carrying out dead zone nonlinear treatment, thus obtaining the signals to be analyzed and processed; carrying out autocorrelation operation on the signals obtained after extraction, thus obtaining an autocorrelation sequence; and then, carrying out dead zone nonlinear treatment on the autocorrelation sequence, extracting the position of the second period from the sequence obtained after processing, and calculating the period of the heart sound signals according to the peak of the second period, thus obtaining the heart rate. According to the heart rate calculating method, the autocorrelation sequence is obtained through autocorrelation treatment and dead zone nonlinear treatment, the heart rate is calculated from the autocorrelation sequence, the calculation for the heart rate can be accurately realized by adopting the heart sound signals, the calculation method is simple, the result is accurate, the requirements for hardware implementation are low, and the realization in wearable devices is very convenient.

The invention relates to a gas suction pump assembly and a cold storage and freezing device. The gas suction pump assembly comprises an installing box and a gas suction pump; a containing space is defined in the installing box; at least part of the box wall of the installing box is made from a micro-porous silencing plate; the surface of the micro-porous silencing plate is provided with a plurality of silencing through holes; the gas suction pump is arranged in the installing box; and the micro-porous silencing plate is arranged to absorb noise generated by the gas suction pump when the gas suction pump runs. By means of the micro-porous silencing plate, the gas suction pump assembly reduces outward spreading of the noise when the gas suction pump runs.

The invention provides an air-cooled refrigerator which comprises a refrigerator body, a water discharge pipeline, a controlled atmosphere membrane component and an air extracting pump, wherein a storing space and a cooling space are formed in the refrigerator body; a storage container is arranged in the storing space; a controlled atmosphere fresh-keeping space is formed in the storage container; the water discharge pipeline is mounted on the refrigerator body, communicated with the cooling space and used for discharging water dropped down from an evaporator out of the cooling space; the controlled atmosphere membrane component is configured to enable more oxygen, relative to nitrogen, in the air flow of the around space permeates a controlled atmosphere membrane to enter an oxygen-enriched gas collecting cavity; the air extracting pump is used for extracting gas permeating the oxygen-enriched gas collecting cavity to be discharged out of the storage container through an air extracting pipeline and an air exhaust pipeline; the air exhaust pipeline is configured to enable gas permeating the oxygen-enriched gas collecting cavity to carry out heat exchange with the water discharge pipeline directly or indirectly after flowing out of the air extracting pump. According to the air-cooled refrigerator, the energy of gas discharged through the air extracting pump is utilized to dissolve residual ice at the inlet of the water discharge pipeline due to that the temperature of the gas is higher than that at the inlet of the water discharge pipeline, so that the water discharge pipeline is prevented from being blocked, and the energy is fully utilized.

The invention relates to a refrigeration and freezing device and a drawer assembly of the refrigeration and freezing device. The drawer assembly comprises a barrel body with the opened front side, a drawer capable of being inserted into the barrel body in a front-back pushed-pulled mode, and an electric control lock mechanism. The electric control lock mechanism comprises a clamping ring, an electric control lock and an emergency unlocking rod. The clamping ring is arranged on the rear wall of the outer side of the drawer. When the drawer is completely pushed into the barrel body, the clamping ring stretches out of the barrel body through a through hole in the rear wall of the barrel body. The electric control lock is configured to be controlled to enable a lock pin of the electric control lock to horizontally move back and forth in the transverse direction so as to be inserted into or disengaged from the clamping ring, and therefore the drawer is locked to or unlocked from the barrel body. The lock pin is provided with a first inclined face which is gradually inclined in the direction away from the clamping ring from bottom to top. The emergency unlocking rod is arranged above the lock pin in a vertical extending mode. The lower end of the emergency unlocking rod is provided with a second inclined face parallel to the first inclined face. According to the configuration, when the lock pin is inserted into the clamping ring, in the moving-down process of the emergency unlocking rod, the lock pin is pushed through cooperation of the second inclined face and the first inclined face to be disengaged from the clamping ring. Automatic locking and unlocking can be achieved for the drawer and the barrel body, convenience is brought to users for operation, and the drawer can still be unlocked when the electric control lock mechanism loses efficacy.

The invention discloses a matched filtering method in which a square wave is used as a swash response of a matched filter, and various filtering coefficients are fixed values. In the invention, the square wave is used as the swash response of the matched filter, and the filtering coefficients are fixed values, thus floating point multiplication required when the traditional matched filter selects an image of a selective forming filter can be avoided, and summation and accumulation of various items are just needed, thereby decreasing achievement difficulty of hardware; the length of the swash response of the matched filter is designed to be a sign period, if the multiple of the sampling is N, order of the filter is N or N+1 which is far smaller than the NK (K is the lasting sign period number of the swash response of the forming filter) of the traditional matched filter, thereby further reducing the achievement requirement of the hardness; and R paths are selected to carry out parallel treatment, so that the work rate of the matched filter is 1 / R less than the transmission rate of data, thereby further meeting the transmission requirement of a high-speed data system.

The invention relates to an air extracting pump assembly and a refrigerating and freezing device. The air extracting pump assembly comprises a sealing box where a sealing space is defined, and an air extracting pump arranged in the sealing box. The sealing box comprises a lower box body with the upper side opened, and an upper box body with the lower side opened. A sealing cover of the sealing box is buckled on the upper side of the lower box body so that the sealing space of the sealing box can be defined by the sealing cover and the lower box body together. The rear end of the upper box body is hinged to the rear end of the lower box body. The front end of the upper box body is fastened at the front end of the lower box body in a thread connection manner. By means of the air extracting pump assembly, outward propagation of the noise of the air extracting pump can be reduced, and the air extracting pump is convenient to disassemble and assemble.

The invention provides a refrigeration and freezing device. The refrigeration and freezing device comprises a box body and an air regulating membrane assembly. The box body is provided with a liner, ashell and a heat preservation layer; the liner is provided with a storage space which is internally provided with a storage container; and the storage container is internally provided with an air regulating fresh-keeping space. The air regulating membrane assembly is configured to enable oxygen in an air flow of the ambient space of the air regulating membrane assembly to more permeate air regulating membranes to enter oxygen-enriched air collecting cavities relative to nitrogen in the air flow of the ambient space of the air regulating membrane assembly. The storage container is composed ofa top cover and a bottom box, a cavity is formed in the lower surface of the top cover, and the air regulating membrane assembly is arranged in the cavity. In the refrigeration and freezing device, aspace for mounting the air regulating membrane assembly does not need to be independently arranged, an opening for enabling the air regulating membrane assembly and the air regulating fresh-keeping space to communicate also does not need to be formed in the top face of the storage container, thus the surface of the storage container of the refrigeration and freezing device is complete, a gap basically does not exist, and the air tightness of the storage container is guaranteed.

The invention provides a refrigerating and freezing device, which comprises a box body, an air control film assembly and an air extraction device, wherein a storage space is limited in the box body; a drawer assembly is arranged in the storage space; in addition, the drawer assembly is provided with a tube body, a drawer and a drawer box space; the air control film assembly is arranged in the drawer; and the peripheral space of the air control film assembly communicates with the drawer box; the air control film assembly is provided with at least one air control film and one oxygen-rich gas collecting cavity, and is configured into a state that much oxygen in the air flow in the peripheral space of the air control film assembly enters the oxygen-rich gas collecting cavity through the air control film relative to nitrogen gas in the air flow in the peripheral space of the air control film assembly; the air extraction device communicates with the oxygen-rich gas collecting cavity through a pipeline so as to exhaust the gas passing through the oxygen-rich gas collecting cavity out of the drawer assembly. The refrigerating and freezing device has the advantages that the fresh keeping effect is good; the requirements on the rigidity and the intensity of the box body are low; the implemention requirement is low; the cost is also lower; in addition, the size is small; the noise is low; the refrigerating and freezing device is particularly suitable for families and individuals.

The invention provides a linear classification algorithm for true and false coughs of patients with cervical spinal cord injury. The algorithm is characterized by comprising the following steps: acquiring a plurality of unvoiced sound samples and voiced sound samples, intercepting initial segment sequences of the unvoiced sound samples and voiced sound samples, and filtering the initial segmentsequences; calculating a zero-crossing rate and a maximum autocorrelation coefficient of the obtained sequences; establishing a linear classifier by taking the zero-crossing rate and the maximum autocorrelation coefficient as characteristics, and training a linear classifier by taking the unvoiced sound samples and the voiced sound samples as a sample set; and identifying the true cough and the shouting type pseudocough of a patient with the cervical spinal cord injury through the trained linear classifier. According to the algorithm, the difficulty that a recognition model cannot be trained due to insufficient cough sound training samples of patients with cervical spinal cord injury is eliminated; the true and false coughs can be recognized only by utilizing unvoiced sound and voiced sound signals, and the interference of the false cough of a shouting sound type on the analysis of the cough intensity is eliminated; meanwhile, the method is simple in model, small in calculation amountand convenient to implement in wearable equipment.

The invention relates to a refrigeration and freezing device and a drawer assembly thereof. The drawer assembly comprises a cylinder body of which the front side is open, a drawer which can be inserted into the cylinder body in a front-and-back push-pull manner, and two sliding rail assemblies which are respectively arranged at the two transverse ends of the inner part of the cylinder body; each sliding rail assembly comprises an outer rail which is fixed inside the cylinder body in an extending manner along the front and back directions, an inner rail which is arranged on the outer rail in a front-and-back sliding manner to be supported by the outer rail and is fixed on the drawer, an elastic clamping groove which is arranged at the back end of the outer rail, and a clamping head which is directly or indirectly fixed at the rear end of the inner rail and is inserted into the elastic clamping groove toward the back side in a process of pushing the drawer into the cylinder body, wherein the elastic clamping groove is elastically deformed to clamp the clamping head to ensure that the inner rail is locked on the outer rail and the drawer is locked on the cylinder body. The drawer assembly provided by the invention has the advantages that a locking mechanism between the drawer and the cylinder body has a simple and novel structure and is convenient for users to open or close the drawer.

The invention provides a refrigerating device. The refrigerating device comprises a case body, an air-adjusted film assembly, an oxygen exhausting pipeline and a gas pumping device. Storage space and a compressor room are arranged in the case body in limited modes, a storage container is arranged in the storage space, and air-adjusted freshness retaining space is arranged in the storage container. The air-adjusted film assembly is configured in a mode that compared with nitrogen in peripheral space airflow of the air-adjusted film assembly, and more oxygen in the peripheral space airflow of the air-adjusted film assembly penetrates an air-adjusted film and enters an enriched oxygen collecting cavity. An inlet of the oxygen exhausting pipeline communicates with the oxygen-rich gas collecting cavity, and an outlet of the oxygen exhausting pipeline is towards a condenser so as to enable gas flowing out of the oxygen-rich gas collecting cavity to blow towards the condenser. The gas pumping device is arranged on the oxygen exhausting pipeline, so that the gas penetrated into the oxygen-rich gas collecting cavity is pumped and exhausted outside the storage container. According to the refrigerating device, not only is the freshness retaining effect good, but also cold energy in the gas flowing out of the oxygen-rich gas collecting cavity is fully utilized so as to conduct cooling on the condenser, and the energy efficiency of the refrigerating device is improved.

The invention relates to an air pump assembly and a refrigerating and freezing device. The air pump assembly comprises a mounting plate, a seal box and an air pump. A backstop part extending upwards is arranged on the rear part of the upper surface of the mounting plate; the front surface of the backstop part is concaved backwards to form a positioning concave part; a positioning convex part protruding backwards is arranged on the rear part of the seal box; the seal box is located on the upper side of the mounting plate; the positioning convex part is clamped into the positioning concave part; the front part of the seal box is locked in the mounting plate; and the air pump is arranged in the seal box. The air pump assembly provided by the invention is low in running noise, and convenient to disassemble and assemble in the refrigerating and freezing device.

The invention provides a cold storage and freezing device. The cold storage and freezing device comprises a refrigerator body, a controlled atmosphere film assembly, an air extraction device and a filtering and purifying device. Storage space is limited in the refrigerator body and internally provided with a storage container, and controlled atmosphere fresh keeping space is arranged in the storage container. The controlled atmosphere film assembly is arranged to make more oxygen in airflow in surrounding space of the controlled atmosphere film assembly enter an oxygen-rich gas collecting cavity through a controlled atmosphere film relative to nitrogen in the airflow in the surrounding space of the controlled atmosphere film assembly. The air extraction device communicates with the oxygen-rich gas collecting cavity of the controlled atmosphere film assembly so that gas penetrating in the oxygen-rich gas collecting cavity can be discharged out of the storage container. The filtering and purifying device is arranged to filter at least part of gas flowing into the surrounding space of the controlled atmosphere film assembly from the controlled atmosphere fresh keeping space. The cold storage and freezing device is good in fresh keeping effect, small in size, low in noise and low in cost, bacteria and other pollutants can be prevented from polluting the controlled atmosphere film assembly, and the service life of the controlled atmosphere film can be prolonged.

The invention provides a cold storage refrigerating device which comprises a cabinet body, an air adjusting film assembly and an air extractor. A first storage space is defined in the cabinet body. A storage container is arranged in the first storage space. The storage container is provided with a cylinder body and an air adjusting preserving space located in the cylinder body. The air adjusting film assembly is installed on the cylinder body, and space around the air adjusting film assembly communicates with the air adjusting preserving space. The air adjusting film assembly is provided with at least one air adjusting film and an oxygen enrichment gas collecting cavity and arranged to enable more oxygen in air flow in the space around the air adjusting film assembly to penetrate the air adjusting films relative to nitrogen in air flow in the space around the air adjusting film assembly to enter the oxygen enrichment gas collecting cavity. The air extractor communicates with the oxygen enrichment gas collecting cavity through a pipeline to extract and pump the gas penetrating into the oxygen enrichment gas collecting cavity out of the storage container. The cold storage refrigerating device is good in preserving effect, moreover, the requirements for rigidity and strength of the cabinet body and the like are low, the achievement requirement is low, and the cost is low. Moreover, the size is small, the noise is low, and cold storage refrigerating device is particularly applicable to families and individuals.

The invention discloses an object density acquisition method and device and belongs to the image analysis technology field. The method comprises steps that n monitoring images of a target area collected at n different times in the target time period are acquired, and the n is an integer greater than 1; objects contained by each monitoring image are identified; the distance difference information corresponding to each monitoring image is acquired, and the distance difference information is used for indicating the degree of difference in the distances among the objects contained in the monitoring images; according to the respective distance difference information of the n monitoring images, the object density of the target area in the target time period is determined. The method is advantaged in that constructing and training a model are not needed in the scheme realization process, and scheme realization complexity and enforcement requirements are reduced.

The embodiment of the invention discloses a video transmission method and system and optical network equipment, which are applied to the technical field of communications. The video transmission method provided by the embodiment of the invention comprises the following steps of: at the video receiving end, if a first video identifier contained in received first streaming media information and used for identifying first video information is two-layer or three-layer characteristic information of a passive optical network (PON), promoting video display, and sending the first video information toa video display device, such as a TV set or a display, of the receiving end to display. Thus, the video information of an opposite end can be received through the optical network equipment, the localend is promoted to display, so that even if user calling devices at both ends do not support video receiving and displaying, the video of the opposite end can also be displayed, and the realization requirement of video transmission is reduced.

The invention discloses a method and device for displaying position marks, equipment and a storage medium, and relates to the technical field of computers. The method comprises the following steps: displaying a thumbnail map; controlling a first virtual object to attack a second virtual object, wherein the first virtual object belongs to the first camp, the second virtual object belongs to the second camp, and the relation between the second camp and the first camp is an adversarial relation; and in response to the condition that the first virtual object beats the second virtual object, displaying a position mark of a third virtual object in the thumbnail map, the third virtual object belonging to the second camp. In this way, the process of displaying the position marks of the virtual objects belonging to the confrontation camp in the thumbnail map does not depend on reconnaissance props, the implementation requirement for displaying the position marks of the virtual objects belonging to the confrontation camp in the thumbnail map is low, and the display frequency is not limited by the number of usable times of the reconnaissance props; the flexibility and reliability of displaying the position marks are improved, and then the man-machine interaction rate is increased.

The invention provides a heart rate calculation algorithm based on a heart sound autocorrelation function, which is characterized by comprising the following steps: obtaining a heart sound sequence, and carrying out filtering processing and envelope solving on the heart sound sequence; And calculating an autocorrelation function in the search range, searching a peak point of the autocorrelation function, and calculating a heart rate value according to the serial number of the peak point. The calculation algorithm can overcome interference of factors such as respiratory sound, friction sound, first heart sound waveform similarity and second heart sound waveform similarity, the heart rate value can be accurately calculated through the heart sound sequence, the calculation algorithm can be conveniently achieved in small wearable equipment and small electronic stethoscopes, and the calculation algorithm is also suitable for electronic auscultation auxiliary diagnosis and treatment systemsfor hospitals and families.

A method for dynamically allocating wavelengths based on a PON system comprises the following steps of: S1, a G / EPON system local side device OLT and a terminal device ONU perform an initialized dynamic discovery process through a standard IEEE802.3OAM or ITU-T OMCC channel; S2, when the local side device OLT detects specific ONU device, negotiation of a wavelength channel is carried out through an extended dynamic communication wavelength protocol EDWP based on MPCP or PLOAM, and idle wavelengths which are not used yet are selected as exclusive wavelengths of the ONU device; S3, the local side device OLT is responsible for maintaining and recycling idle wave bands; and S4, the local side device OLT and the terminal device ONU perform subsequent registration authentication interaction andservice flow in the new wavelength channel. According to the invention, partial functions of the WDM-PON are realized, and the realization difficulty and requirements of the ONU laser are reduced; thebandwidth of the current G / EPON system can be directly improved from the current 2.5 / 1 / 25G throughput sharing mode to 2.5 / 1 / 25G exclusive use of single-terminal ONU device; and the method is completely compatible with the original G / EPONONU, and the G / EPONONU and the EPONONU share bandwidths and do not influence each other.