58results about How to "Low balance" patented technology

The invention discloses a large language model parameter fine tuning method, system and device, a storage medium and a product, and relates to the field of natural language processing. The fine tuning method comprises the steps that a pre-training model and a parameter matrix of the pre-training model are acquired, a parameter fine tuning module is arranged on a self-attention layer of the pre-training model, the parameter fine tuning module comprises LoRA modules of different task types and a router, each LoRA module comprises a general feature matrix and a specific feature matrix, and the general feature matrixes of the multiple LoRA modules are shared; obtaining a fine tuning data set; loading and freezing a parameter matrix of the pre-training model, and initializing parameters of a parameter fine tuning module; and performing fine tuning on the parameters of the parameter fine tuning module based on the fine tuning data set to obtain a fine-tuned large language model. Parameters of the MoE architecture are remarkably reduced, it is ensured that the model captures differences of various tasks to the maximum extent, and the cross-task generalization of the model is ensured.

The invention discloses an efficient parameter fine tuning method based on interleaving memory of twin large language models. The method comprises the following steps: step 1, pre-constructing two large language models sharing the same structure and pre-training parameters; wherein one large language model keeps original parameters frozen, and the other large language model is finely adjusted by using an efficient parameter fine adjustment method; 2, respectively processing given input by using the two large language models constructed in the step 1, and respectively generating different memories; the memory refers to the last layer of hidden state generated by the large language model; and step 3, introducing a twinning large language model interleaving memory mechanism, and adjusting the contribution of the memory of the large language model with frozen original parameters and the large language model finely adjusted by using the efficient parameter fine adjustment method to the generation of the next lexical element. According to the method, excellent performance is achieved on downstream tasks, the problem of disastrous forgetting is effectively solved, and extra fine adjustment time does not need to be increased.

The invention discloses an electrical equipment operation fault monitoring system, and belongs to the technical field of electrical equipment fault monitoring. Through combination of various sensors, comprehensive real-time monitoring of electrical equipment is realized, running state data of the equipment is captured in real time, comprehensiveness and accuracy of the data are ensured, potential equipment fault types can be accurately identified through digital processing and deep feature extraction, the accuracy and timeliness of fault diagnosis are effectively improved, and the fault diagnosis efficiency is improved. Operation data of multiple devices are integrated through the industrial Internet of Things, the range and precision of fault diagnosis are improved through data sharing and multi-device correlation analysis, faults jointly caused by the multiple devices are comprehensively analyzed and positioned, an intelligent fault diagnosis and optimization scheme is provided for a complex device group, and the fault diagnosis efficiency is improved. The data aggregation optimization unit effectively optimizes the overall operation state of the equipment by adjusting the operation parameters of the equipment, avoids the problems of load imbalance and the like, and improves the operation efficiency of the system.

The invention relates to the technical field of air blowers, in particular to an energy-saving air blower for a roasting furnace, which comprises a shell and a driving frame rotationally arranged in the shell, a plurality of impeller blades are arranged on the driving frame, a driving disc is arranged on the driving frame, and a connecting rod assembly is arranged on the driving disc; an air inlet pipe is arranged on the shell; a fixing disc is arranged on the air inlet pipe, an adjusting mechanism is arranged on the fixing disc, the adjusting mechanism comprises a worm gear and a worm, angle adjustment is achieved on impeller blades, the air volume adjusting function is directly integrated in an impeller area, and indirect influences of adjustment of a traditional diffuser on the air volume are avoided; and the self-locking characteristic of the worm gear and the worm is utilized to ensure that the adjusted impeller blade angle does not deviate under the influence of vibration or external force, and the stability is enhanced. And the driving disc can be driven by the adjusting mechanism in the process of rotating along with the driving frame. The purposes of optimizing an airflow path, reducing energy loss and improving the overall efficiency of the air blower are achieved through angle adjustment of the impeller blades.

The invention discloses a chromium group metal doped platinum alloy catalyst as well as a preparation method and application thereof, and relates to a platinum alloy catalyst as well as a preparation method and application thereof. The technical problem that an existing alloy catalyst formed by Pt and transition metal is poor in catalytic activity and durability is solved. According to the catalyst, PtM alloy nano-particles doped with a chromium group element X are uniformly supported on a carbon carrier; in the PtM alloy doped with the chromium group element X, X exists in the form of a simple substance, and the mass percentage content of X is 5%-10%; the X-PtM / C is marked as X-PtM / C, and X is Cr, Mo or W; m is Fe, Co or Ni. The preparation method comprises the following steps: carrying out secondary reduction and high-temperature heat treatment by taking Pt / C as a precursor to obtain the catalyst. The mass activities of Cr-PtNi / C, Mo-PtNi / C and Cr-PtCo / C are respectively 0.419 A / mgPt, 0.254 A / mgPt and 0.314 A / mgPt, and are 5.0 to 8.1 times of that of Pt / C. And after the Cr-PtNi / C is aged for 30000 circles, the potential is not attenuated. The invention can be used in fuel cell field.

The invention discloses a short temporary rainfall prediction method based on multi-modal fusion and dynamic weighting loss. Comprising the following steps: firstly, inputting historical radar and ground station data, and carrying out normalization and downsampling processing; respectively inputting radar and ground station meteorological element data into three layers of networks containing up-sampling and RNN (Recurrent Neural Network) for feature coding; and inputting three layers of networks including fusion, up-sampling and RNN to perform feature fusion and decoding. And finally, outputting accurate rainfall prediction under the constraint of dynamic weighting loss. According to the method, coding, fusion and decoding of radar and ground station meteorological element data are realized. Under the clamping of a fusion network based on an attention mechanism and dynamic weighting loss, the accuracy of short temporary rainfall prediction is improved, and the performance of heavy rainfall prediction is improved more remarkably.

The invention discloses a safety assessment alarm system and method for physical education sports, and relates to the technical field of safety alarm, the system comprises a physiological state monitoring module, a sports image acquisition module, a central processing unit and a signal alarm module, the abnormal risk of physical training of the athlete is evaluated from the angle of movement posture and track deviation, and the abnormal condition of physiological parameters of the athlete is combined, so that the training intensity of physical exercise is quantitatively monitored, the personal safety risk degree of the athlete is specifically evaluated, and a safety alarm signal is generated to give an instant alarm. Alarm judgment accuracy is guaranteed through comprehensive data analysis, the probability of misjudgment and false alarm of the system is reduced, physical education professionals are prompted to carry out timely medical safety inspection and management on athletes through safety alarm signals, and balance between improvement of athletic performance and reduction of safety risks is achieved.

The invention relates to the technical field of wind power equipment, in particular to a metal repairing device and method for bearing abrasion of a wind generating set. The metal repairing device comprises a wind power main shaft, a first mounting part and a second mounting part are arranged on the wind power main shaft, and a bearing seat assembly is arranged on the first mounting part and the second mounting part and comprises a shell; a bearing assembly is arranged in the shell, an air inlet input end, a lubricating grease input end and a lubricating grease extraction end which are connected with the bearing assembly are arranged on the shell, and an electromagnetic part is arranged on the outer side of the shell; the bearing assembly comprises an inner ring arranged on the wind power main shaft, and a retainer is arranged on the outer side of the inner ring; a circulating assembly is arranged in the retainer, rollers distributed in an array mode are arranged on the retainer, an outer ring is arranged on the outer sides of the rollers, the outer ring is fixedly connected with the shell, and a bundling assembly is arranged on the inner side of the outer ring; by arranging the circulating assembly and the collecting assembly, the problem of excessive abrasion between the roller and the roller path due to roller slipping is solved.

The present invention relates to the field of cold air machine blade processing, specifically a cold air machine blade welding and forming processing equipment, including a support table and a multi-dimensional welding robot installed on the support table, a blade assembly device is installed on the top of the support table, and the blade assembly device includes an assembly table fixed on the support table, a sleeve fixing mechanism for fixing the sleeve is installed at the center of the top of the assembly table, and a blade clamping mechanism for clamping the blade is arranged around the sleeve fixing mechanism. The present invention fixes the sleeve by the sleeve fixing mechanism, thereby improving the stability of the sleeve during welding, clamps the blade by the blade clamping mechanism, and then drives the blade to move inward with the clamping block and presses the blade against the outside of the sleeve, so that the multi-dimensional welding robot can directly weld the blade and the sleeve, and no spot welding is required before welding, thereby improving the efficiency of blade welding.

The invention discloses a rotating machine fault diagnosis method based on a conditional decoupling representation enhanced network, and the method comprises the steps: capturing fault features from a known source domain and an unknown target domain for an acquired rotating machine vibration signal through a deep convolution feature extractor for a scene of rotating machine data category imbalance and cross-domain fault diagnosis; high-quality class semantic information is generated through a decoupling representation enhancement module to enhance minority class features in a high-dimensional feature space, so that inter-class data distribution is balanced, the influence of number difference of different classes of samples is reduced, then, the attention degree on minority classes is improved through condition discrimination comparison loss, and the accuracy of classification is improved. The intra-class feature compactness of the same class cross-domain is enhanced; and finally, a required unbalanced domain generalization mechanical fault diagnosis model is formed. According to the method, the influence of class imbalance can be overcome, the generalization ability and robustness of an unknown target domain can be improved, and the accuracy of rotating machine fault diagnosis is effectively improved.

The invention provides an underground mining mine water supply and drainage scheduling method and related equipment, and relates to the technical field of water supply and drainage, the method comprises the following steps: gathering underground drained water to an underground sump, and controlling start and stop of an underground drainage pump based on a first monitoring value, the first monitoring value being monitored based on a first liquid level controller of the underground sump; the underground drained water is drained to an earth surface reservoir, starting and stopping of an earth surface water supply pump are controlled based on a second monitoring value, and the second monitoring value is monitored based on a second liquid level controller of the earth surface reservoir; and the redundant underground drainage water is conveyed to a return water circulation pool, starting and stopping of a return water pump are controlled based on a third monitoring value, and the third monitoring value is monitored based on a third liquid level controller of the return water circulation pool.

The utility model provides a vacuum chuck device suitable for various wafer sizes, which comprises an upper chuck body and a lower chuck body, the bottom surface of the upper chuck body is fixed on the top surface of the lower chuck body, and the upper chuck body comprises an external O-shaped rubber ring, a middle O-shaped rubber ring, an internal O-shaped rubber ring and a metal surface. The outer O-shaped rubber ring, the middle O-shaped rubber ring and the inner O-shaped rubber ring are concentrically fixed to the top face of the metal face, a plurality of air holes are formed in the metal face along the inner O-shaped rubber ring, a plurality of fan-shaped annular grooves are formed in the portion, between the middle O-shaped rubber ring and the outer O-shaped rubber ring, of the metal face, and the air holes are formed in the fan-shaped annular grooves. A connecting hole is formed in the center of the bottom face of the lower sucker body. According to the utility model, a plurality of O-shaped rubber rings are used for adsorption, the wafer is not in direct contact with a metal surface, the wafer breaking probability is reduced, and the wafer clamping device is suitable for wafers of various different sizes.

The utility model provides a wear-resistant rubber covered roller for a printing machine, relates to the technical field of rubber covered rollers for printing machines, and solves the problems that printing parts outside the rubber covered roller can be replaced in order to ensure the printing quality, but the printing parts of a common rubber covered roller are difficult to replace. In the prior art, the rubber roller generally does not have a good stable structure to assist the connection stability between the rubber roller and a printing part, so that the printing quality is influenced due to looseness between the printing part and the rubber roller. A wear-resistant rubber roller for a printing machine comprises a connecting shaft, a rubber roller and a rubber roller body, fixed side seats are symmetrically and fixedly mounted at the two ends of the connecting shaft; after the connecting sleeve is replaced, an operator only needs to rotate the knob to drive the limiting screw rod to rotate and push the limiting sliding block to move until the limiting teeth at the bottom of the limiting screw rod are completely clamped with the limiting teeth on the limiting block of the rubber roller main shaft, so that the fixed side seat is effectively prevented from loosening due to vibration or external force, and the long-term stability of the connecting sleeve is ensured.

The present invention discloses a catalytic diesel combined treatment process and system, the treatment process includes the following contents: catalytic diesel is fractionated to obtain component A, component B and component C, component A, component B and component C enter different catalyst beds in a fixed bed hydrogenation reaction zone for reaction respectively, the first liquid phase material obtained after gas-liquid separation of the reaction effluent enters an ebullating bed hydrogenation reaction zone for reaction, and the reaction effluent is separated to obtain naphtha and unconverted diesel. The treatment process is based on the concept of molecular refining combined with a fixed bed-ebullating bed hydrogenation combined process, and the different aromatics in the catalytic diesel raw material are matched with suitable reaction paths for treatment, so as to solve the problems of hot spots and high hydrogen consumption in the existing catalytic diesel process, and at the same time greatly improve the quality and yield of high value-added aromatic products, and the operation cycle of the device is greatly improved.

The application discloses a clothes treating apparatus, which comprises a cabinet, a drum assembly and a damping assembly. The cabinet comprises a base, the drum assembly is above the base and comprises an inner drum, and the damping assembly is between the base and the drum assembly and comprises arc-shaped beams. The arc-shaped beams are all convex to the drum assembly, and are configured to reduce the convex height under the pressure of the drum assembly when supporting the drum assembly. The convex heights of the arc-shaped beams are all different, and the stiffness of the arc-shaped beams increases in turn according to the order of the convex heights from high to low. The end of each arc-shaped beam is movably arranged on the base. The arc-shaped beams are configured to: when the inner drum is in a static state, the top of at least one arc-shaped beam is in supporting contact with the drum assembly; and when the inner drum rotates relative to the cabinet, the arc-shaped beams are in supporting contact with the drum assembly in turn according to the order of the convex heights from high to low. The damping assembly is beneficial to avoiding that the drum assembly drives the cabinet to vibrate due to excessive vibration, and is beneficial to avoiding noise.

The utility model discloses a thermal field structure for preparing silicon carbide crystals, which comprises a case and an outer support sleeve fixed at the top end of the case, a graphite end cover is bolted at the top end of the outer support sleeve, a conical case is fixed at the bottom end of the outer support sleeve, a protective sleeve is fixed inside the conical case, and the protective sleeve is fixed at the bottom end of the outer support sleeve. An inner steel container is fixed in the outer supporting sleeve, and an electromagnetic heating type graphite crucible is installed in the inner steel container in a sliding mode. The symmetrical worm and gear transmission structure and the conical fluted disc two-way transmission structure can evenly distribute loads, reduce unbalance and friction in the moving process, improve the stability and durability of a lifting system, enable mechanical parts not to be affected by thermal expansion and deformation even if the lifting system operates for a long time and is in the high-temperature and high-pressure environment, and improve the service life of the lifting system. And the stability and the accuracy of the lifting motion of the electromagnetic heating type graphite crucible are ensured.

The invention discloses a fully-isolated touch screen USB interface circuit and method, and relates to the technical field of isolation, the fully-isolated touch screen USB interface circuit comprises a computer module, an upper isolation control module, a USB bus data positive signal, a USB bus data negative signal, a USB bus data positive signal, a USB bus data negative signal, a USB bus data positive signal, a USB bus data negative signal, a USB bus data positive signal, a USB bus data negative signal and a USB bus data negative signal, a first photoelectric coupling unit is arranged in the upper isolation control module, and the upper isolation control module outputs two paths of signals to drive the first photoelectric coupling unit. The device has the advantages that the LSI # pin of the isolation control chip in the isolation control module is the USB transmission speed selection input pin, and the LSO # pin is the USB transmission speed automatic detection result output pin, so that the automatic identification of the USB speed and a pure hardware solution are realized, the device is completely real-time and transparent to a USB protocol, an additional filtering or signal conditioning circuit is not needed, the influence is reduced, and the reliability of the device is improved. And common-mode and differential-mode interference in equipment is effectively isolated from a signal and a power supply, so that a transmission path through the USB interface is effectively isolated.

The utility model relates to a kind of dynamic cone balancing device of conical crusher, including ring disc and hydraulic cylinder, the four around integral moulding of ring disc has hinge seat, one end of hydraulic cylinder is hinged with hinge seat, the other end of hydraulic cylinder is hinged with dynamic cone inner wall, the bottom mouth of ring disc is inserted with bottom cover, the top mouth of ring disc is screwed with top cover, the disc body of ring disc is equipped with the inner oil passage of through inner and outer wall, the outer end port of inner oil passage is embedded with external connection pipe, the external connection pipe is communicated with hydraulic cylinder by connecting pipe and outer oil passage;By ring disc, top cover and bottom cover constitute internal cavity, by the communication internal cavity and hydraulic cylinder of inner oil passage and outer oil passage, by the damping flow of hydraulic oil, realize the upper stability of dynamic cone, reduce the vibration influence and unbalanced motion of dynamic cone, to realize the balance control of dynamic cone, and the whole device does not need external device drive, by internal hydraulic oil communication movement, realize passive balance and shock absorption.

The shaft end of an input shaft of the parallel shaft gearbox type speed reducer is connected with a motor shaft through a locking ring, the locking ring comprises a locking ring body and an installation body, the locking ring body comprises a deformation part and a base body part which are symmetrically distributed, the deformation part and the base body part are both of a semi-annular structure, and the installation body is connected with the deformation part. An adjustable locking hole is formed between the deformation part and the base body part, the deformation part and the near end of the base body part are integrated, an adjusting notch is formed in the far end, and screw holes are formed in the far ends of the deformation part and the base body part; two first balance holes are formed in the outer end face of the lock ring body in the axial direction, and the two first balance holes and the screw holes of the deformation part and the base body part form dynamic balance. According to the speed reducer, the locking ring is arranged at the end of the input shaft so as to achieve lossless hooping and quick disassembly and assembly of the motor shaft, friction is reduced, the total heating value is reduced, the grease leakage phenomenon of the sealing ring is reduced to a certain extent, the overall dynamic balance state of the locking ring can be kept through the balance hole formed in the locking ring, and the service life of the speed reducer is prolonged. And unbalanced vibration and noise in the transmission process are reduced.

The invention provides a PAPR suppression algorithm realized based on pulse shaping modulation, and belongs to the field of communication, and the algorithm comprises the steps: building an end-to-end OFDM communication system model, the communication system model comprises a transmitter, a channel and a receiver, a transmitting end PS module is realized by a transmitting DNN, and the transmitting DNN comprises a transmitting input layer connected with an S / P module and a transmitting output layer; the channel is a multipath fading channel; the receiver comprises an equalization module and a demodulation mapping module which are connected in sequence; and S2, carrying out joint training on a neural network formed by the transmitter, the channel and the receiver by using a joint loss function L = alpha1L1 + alpha2L2. According to the invention, on the premise that the transmission rate and the error rate are not influenced, the PAPR of the transmitting end can be reduced, and flexible configuration of pulse shaping can be realized, so that different communication scenes can be flexibly supported.

The invention discloses a dynamic loss control method for an annular bus of a motor driver, which belongs to the technical field of motor driver control and comprises the following steps: a pulse optimizer changes pulse modulation of multi-phase voltage to generate a modulation signal; solving to obtain real-time current distribution of the annular bus by the mathematical solving model; the loss calculation module calculates the real-time ohmic loss of the annular bus according to the current distribution and the distribution resistance of the annular bus, and feeds the real-time ohmic loss back to the pulse optimizer; the pulse optimizer continuously adjusts the modulation signal and compares the change of the ohmic loss until the ohmic loss reaches the minimum value, and the modulation signal at the moment serves as a final control command; and finally, the control command is sent to each driving bridge arm. According to the method, the loss of the motor driver bus is controlled to reach the minimum value, and the phenomena of voltage fluctuation, current imbalance and ring current on the annular bus can be effectively reduced, so that the ring current of the distributed driver bus can be effectively avoided, and the efficiency of the motor driver is improved.

The invention discloses a rural power distribution network static change-over switch locating and sizing method considering PESS. The method comprises the following steps: establishing an upper-layer static change-over switch annual comprehensive cost optimization model by taking static change-over switch annual comprehensive cost minimization as a target function and taking the static change-over switch installation number and static change-over switch equipment current as constraint conditions; establishing a lower-layer power system stabilizer operation strategy optimization model taking rural power distribution network three-phase unbalance degree operation minimization as a target function and taking three-phase power distribution system operation constraint, static change-over switch equipment operation constraint and mobile energy storage system micro-grid operation constraint as constraint conditions; and forming a static change-over switch planning-operation double-layer model by the upper-layer model and the lower-layer model, solving the static change-over switch planning-operation double-layer model by adopting a double-layer hyper-parameter alternate iteration mode, and determining a rural power distribution network locating and sizing optimal scheme. According to the method, the problems that the convergence speed is low and local optimum is easily caused in the aspect of rural power distribution network STS locating and sizing are solved.

The invention provides a beam switching processing method and device. The method comprises the following steps: receiving a first resource sent by target terminal equipment in a current measurement period; for each first synchronization signal block, updating a count value corresponding to the first synchronization signal block based on a magnitude relationship between the first signal receiving power corresponding to the first synchronization signal block and the current signal receiving power corresponding to the current synchronization signal block; based on the updated count value corresponding to the first target synchronization signal block, determining whether the current measurement period satisfies a beam switching condition; and if the beam switching condition is satisfied, determining a beam switching mode according to the beam attribution relationship between the first synchronization signal block and the current synchronization signal block, and performing beam switching based on the beam switching mode. By adopting the beam switching processing method and device, the problem that the signaling overhead and the optimal beam selection are difficult to balance when the base station manages the beam switching of the terminal equipment is solved.

The utility model discloses a high rotating speed motor rotor punching sheet, comprising a silicon steel sheet body, a plurality of arc-shaped projections arranged on the outer peripheral surface of the silicon steel sheet body, flat magnetic grooves arranged on the silicon steel sheet body corresponding to the inner sides of the arc-shaped projections, air grooves arranged at two ends of the flat magnetic grooves, and a shaft hole arranged at the central position of the silicon steel sheet body. The hole edge of the shaft hole is provided with a plurality of concave positions, and lightening holes and balancing holes are formed in the peripheral positions corresponding to the shaft hole. A ventilation recess is formed between two adjacent arc-shaped projections, so that the temperature of the rotor punching sheet and the magnetic steel can be effectively reduced. Moreover, the arc-shaped protrusions can reduce the harmonic component of the air gap, reduce the torque pulsation, and enhance the structural strength of the stator punching sheet. The flat magnetic grooves are used for inserting the magnetic steel, and air can flow through the air grooves at the two ends of the flat magnetic grooves to assist in heat dissipation, so that the rotor is subjected to heat dissipation in the operation process, and the operation performance of the motor is ensured. Meanwhile, the concave position is arranged, an air channel is added, the heat dissipation effect is further improved, and the temperature of the motor during operation can be reduced; the balance holes can effectively keep dynamic balance of the rotor, and vibration and noise are reduced. The lightening holes not only reduce the weight of the rotor, but also facilitate the improvement of the efficiency of the motor and the reduction of energy consumption, especially at a high rotating speed, the influence of mass on the balance and high-speed operation of the rotor is reduced, and the high-rotating-speed performance of the rotor is improved.

The present invention discloses an electrical stimulation vestibular rehabilitation system and method. A microprocessor receives a stimulation gating control instruction containing a target electrical stimulation channel, outputs a stimulation gating control signal to a stimulation gating circuit to control the conduction of the target electrical stimulation channel of the stimulation gating circuit; after gating, an impedance signal measured by an impedance detection module is received, and the impedance of the left / right stimulation electrode + contacting with the human body, the impedance of the left stimulation electrode - contacting with the human body, and the impedance of the right stimulation electrode - contacting with the human body are analyzed, and when the three impedance values ​​are all less than the set impedance value, information that each electrode has good contact is output; thereafter, an electrical stimulation instruction containing a target electrical stimulation waveform, frequency, and intensity is received, a waveform generation module and a constant current driving module are controlled to form an electrical stimulation signal having a target electrical stimulation waveform, a target electrical stimulation frequency, and a current corresponding to a target electrical stimulation intensity, and the signal is applied to a patient through the stimulation electrode of the target electrical stimulation channel, so as to perform electrical stimulation vestibular rehabilitation treatment on the patient.

The utility model relates to the technical field of UV offset printing ink production, disclose a kind of automatic feeding device for UV offset printing ink production, including pipe body, the top of the pipe body is outwardly inclined, the top of the inside of pipe body is provided with the filter assembly of convenient to take, the filter assembly includes filter layer, the top of both sides in pipe body is fixedly connected with support base, the filter layer is located at the top of the inside of pipe body.This UV offset printing ink production automatic feeding device is provided with filter layer, limiting frame, inner socket, positioning rod, support base and push plate, can carry out deep filtration to the ink imported into pipe body, quickly remove the impurity in ink, optimize the connection mode of filter layer, it is convenient to disassemble and use, solve the problem that plant-based environmentally friendly ink special smell is easy to attract insects, unable to filter ink and reduce the purity of ink, subsequent use is prone to dirty spot and affect the appearance.

The invention relates to the field of fish ecology, in particular to a fish migration dam-passing auxiliary system which comprises a driving wheel and an annular cable, the two ends of the interior of the annular cable are sleeved with the driving wheel and a driven wheel respectively, a suspension box is fixedly arranged on the cable and comprises a fixing plate and a box body, the top end of the fixing plate is connected with a rope clip through a suspension rod, and the rope clip is fixedly connected with the cable. The lower portion of the fixing plate is connected with a box through a lifting assembly, the box is of a hollow structure with the bottom open, a communicated sliding groove is formed in one inner wall of the box and the bottom box wall, a supporting plate is slidably installed in the sliding groove, the two sides of one end of the supporting plate are connected with the two ends of a chain respectively, and the chain is driven by a chain wheel and a chain wheel motor. The chain drags the supporting plate to move to the opening in the bottom of the box body from the inner wall of the box body through the sliding groove to achieve blocking. Trapped fish schools migrated to the dam are transferred to a target water area through the box body, the fish school migration success rate is increased, and the number and variety diversity of the fish schools are maintained; oxygen is automatically supplied into the running box body, so that the survival rate of fish schools is ensured.

The utility model relates to the technical field of encoders, in particular to a novel encoder, which comprises an assembly casing. A coding assembly structure is assembled on the inner side; the coding assembly structure comprises an installation shaft rotationally installed on the inner side of the assembly machine shell, a main shaft rod is rotationally installed on the inner side of the installation shaft, and a coding disc is integrally fixed to the end, located in the assembly machine shell, of the main shaft rod; the device has the advantages that mounting and adjusting are convenient, the assembly screw cylinder of the assembly flange rotates through an external tool, position adjustment can be achieved through screw transmission in a screw hole of the assembly flange, then screw locking is conducted through the nut, the assembly position can be accurately adjusted, and mounting precision is ensured; the gravity center is stable when the assembly flange rotates, shaking and unbalance are reduced, stable operation of equipment is facilitated, the equipment failure risk caused by the unstable gravity center is reduced, and the service life of the equipment is prolonged.

This utility model discloses a speaker protection device, comprising a slide plate, a speaker body, a locking assembly, a flipping assembly, a first handrail, and two second handrails. Two traveling wheels and two pulleys are fixedly connected to the underside of the slide plate. The locking assembly is used to limit and lock each of the traveling wheels. The first handrail and the two second handrails are all fixedly connected to the slide plate. The flipping assembly is disposed on the slide plate and is used to adjust the sound output direction of the speaker body. The diameter of the traveling wheel 13 is larger than the diameter of the pulley 14. This utility model aims to facilitate user operation, flexibly adjust the channel direction, and improve the usability of the product.