309results about How to "Flexible settings" patented technology

The invention relates to a lattice-based specified server searchable encryption optimization method, device and equipment and a medium, and the method comprises the following steps: a receiver mechanism calculates and determines # imgabs0 # imgabs1 # according to a system public parameter pp, a public key pkr = Ar of the receiver mechanism, a private key skr = Tr of the receiver mechanism and a keyword w 'belongs to {0, 1} * to be searched, and a SamplePre (Ar, Tr, uw', sigma) algorithm is called to generate a trap door ew '; and the cloud server matches keyword information in the ciphertext and the trap door according to the ciphertext Cw = (c1, c2, c3), the trap door ew'and a private key skc = ec of the cloud server, and sends a matching result to a user client corresponding to a receiver mechanism to complete lattice-based specified server searchable encryption optimization. The system is convenient to manage and maintain, the specified server can centrally manage encrypted data and search trap doors, and maintenance and management of the system are facilitated.

The invention discloses a routing path determination method and device, a medium and a product, and relates to the technical field of communication. On the basis of a triangular prism network structure, when a source routing node and a target routing node are located on the same layer, the source routing node and the target routing node are determined by adopting a triangular prism side edge routing rule, a triangular prism surface routing rule and a relation of actual exclusive or results of the two routing nodes. According to the triangular prism side edge routing rule, side edge routing is preferentially carried out under the condition that the two routing nodes are not located on the same triangular prism face, the routing path is made to be short, and finally the two routing nodes move to the same triangular prism face. The routing rule of the triangular prism surface is based on the routing rule of routing along the triangular prism surface under the condition of the same surface, the flexibility and diversity of the routing path are determined according to different rules, and deadlock is avoided. And when in different layers, the system needs to jump to the same layer for routing planning, so that the reliability of communication is ensured.

The invention discloses an electric control type constant oxygen partial pressure closed diving respirator system which comprises an air supply subsystem, a breathing circulation subsystem and an electric control subsystem. The air supply subsystem comprises an oxygen supply system and a diluted gas supply system, the breathing circulation subsystem comprises a breathing circulation pipeline and a carbon dioxide absorbent tank connected in the breathing circulation pipeline in series, and the electric control subsystem comprises an oxygen supplementing electromagnetic valve installed between the oxygen supply system and the breathing circulation pipeline. The gas sensor is used for collecting gas parameters in a breathing circulation pipeline, and the display device, the control panel and the power source are connected with the oxygen supplementing electromagnetic valve and the gas sensor. The oxygen supply can be accurately controlled, the adjustability is high, the response is quick, the stability is good, meanwhile, information can be detected and displayed in real time, and the use safety and comfort are improved.

The invention relates to the technical field of microorganism sampling equipment, in particular to an ore-containing salt lake brine microorganism sampling device and method.The ore-containing salt lake brine microorganism sampling device comprises a balance weight floating platform, and through cooperation of a laser ranging mechanism, a PLC, a first electromagnetic valve, a second electromagnetic valve and an air pump, the sampling depth can be adjusted according to the actual sampling depth requirement; sampling distance parameters are flexibly set through the PLC according to actual sampling requirements, the winding mechanism is controlled to work through the PLC, the winding mechanism drives the sampling head to be lowered or pulled back, the distance between the sampling head and the bottom plate is detected through the laser ranging mechanism, and when the actual distance detected by the laser ranging mechanism reaches a set value, the sampling head is driven to move back and forth. The first electromagnetic valve and the second electromagnetic valve on the to-be-sampled barrel are started through the PLC, the air pump is started, a sample enters from the sampling head through an air pumping mode of the air pump, the operation is simple, the use is convenient and fast, and meanwhile, the sampling flexibility of samples with different depths is improved.

The invention discloses a system and a method for measuring the weight center of gravity of an unmanned helicopter, belongs to the technical field of unmanned aerial vehicles, and is used for solving the problems of low measurement precision and limited measurement scene of the system for measuring the weight center of gravity of the unmanned helicopter. The measuring system comprises a weight measuring unit, a horizontal measuring unit, a lifting unit and a distance measuring unit. The weight measuring unit comprises four weight measuring assemblies; the horizontal measuring unit comprises a first bevel protractor and a second bevel protractor, the first bevel protractor and the second bevel protractor are located on a main shaft of the unmanned helicopter, the distance measuring unit comprises a horizontal laser instrument and a laser centering tool, the laser centering tool is fixed on the main shaft of the unmanned helicopter, and the laser centering tool comprises an inclined laser centering line. The center line of the laser pair and the center line of the spindle are coplanar. According to the measuring system and the measuring method, the position of the weight gravity center of the unmanned helicopter measured by a four-point weighing method in the horizontal direction can be improved, and testing of different helicopter types and different sites can be met.

The utility model provides a secondary locking mechanism, a locking device and an electric automobile, the secondary locking mechanism comprises a lock base, a spring bolt and a lock rod, the lock base is provided with an opening and a cavity extending from the opening to the inside of the lock base, and the opening is used for allowing a locking piece installed on a battery pack to enter the cavity; the spring bolt is located in the cavity, and the spring bolt can rotate relative to the lock base to open or close the opening so as to change between an unlocking state and a locking state; one end of the lock rod is rotationally connected to the spring bolt, the lock rod is provided with a guide part and an unlocking part, and when external force acts on the unlocking part, the lock rod moves along a moving path guided by the guide part so as to drive the spring bolt to rotate relative to the lock base to open the opening. The lock rod is beneficial for increasing the maximum rotation angle of the spring bolt, the force application position of external force and the arrangement of the spring bolt are more flexible and diversified, the guide part is beneficial for improving the accuracy of rotation of the spring bolt, and the situation that the spring bolt cannot rotate due to the fact that the lock rod deviates from a correct moving path is avoided.

The utility model relates to the technical field of electric appliance packaging, in particular to a cushion packaging structure. The cushion packaging structure comprises an outer layer and an inner layer, the inner layer and the outer layer are oppositely arranged, a core layer is arranged between the inner layer and the outer layer, the core layer comprises a polyurethane foaming material, the polyurethane foaming material is composed of isocyanate and polyhydric alcohol, and when the core layer is pressed, the polyurethane foaming material is separated from the outer layer. The polyurethane foaming material expands and is supported at the position between the inner layer and the outer layer, the buffering packaging structure can expand to serve as a buffering material to protect a product after pressure is applied, and the buffering packaging structure has the advantages of being easy to package and high in flexibility.

The utility model discloses an indoor unit and a heating and ventilation system. The indoor unit comprises a shell, a water pump assembly and a connecting pipe, a heat exchange air duct is defined in the shell, the shell comprises a water pan, at least part of the water pan forms the inner wall face of the heat exchange air duct, and the water pan is provided with a water receiving groove. The water pump assembly is arranged beside the water pan and comprises a water pump box and a water pump, the water pump box is provided with a water pumping cavity, and the water pump is arranged in the water pumping cavity and used for pumping water in the water pumping cavity. And the other end of the connecting pipe is connected with the water pump box, so that the water receiving tank is communicated with the water pumping cavity. According to the technical scheme, the water pump can be conveniently disassembled, assembled and overhauled, and working efficiency is improved.

The invention discloses a parameterized device automatic generation method and system based on an interface, a device is decomposed into a plurality of mutually associated components, a preset area is constructed by means of area creation, area reference and area transformation, and after a layer is bound to the preset area, the component of the device is obtained; construction parameters can be flexibly set when the area is constructed, and finally, all the components are spliced into a complete device. According to the method, parameterization of device design is realized, underlying codes do not need to be deeply mastered, the development time of the process suite is shortened, the development cost is reduced, and the device design efficiency is improved. Besides, parameters of a complete device or all components of the device are stored, templates are formed, so that parameter multiplexing is achieved, the device design efficiency is improved, the stored templates are converted into formats compatible with different platforms, parameterized devices can be automatically generated on the different platforms according to the exported parameters, and the device design efficiency is improved. And the device design efficiency and flexibility are improved.

The invention relates to a transponder autonomous reset method suitable for a micro-nano satellite. The method specifically comprises the following steps: S1, setting a timer in a transponder; s2, the timer starts timing from 0, and the reading per second is increased by 1; s3, according to the fact that timing of the timer reaches a reset timing threshold value, the responder conducts continuous interpretation of the locking state within the locking interpretation time; s4, judging that the number of times of continuous locking abnormal states reaches a reset locking interpretation threshold value, if so, automatically resetting the responder, otherwise, not resetting; and S5, resetting the timer, and executing the step S2. The method can be applied to responders with different measurement and control systems and frequency bands; under the condition that the normal measurement and control service of the micro-nano satellite is not influenced, the autonomous recovery capability of the responder in a single-particle fault state is enhanced, and the intervention frequency of a ground measurement and control station is reduced.

The invention discloses a self-adaptive predefined time preset performance control method for a piezoelectric micro-positioning platform, and the method comprises the steps: building a mathematical model according to the characteristics of the piezoelectric micro-positioning platform; then, a preset performance function is utilized to ensure that tracking errors are converged to any set set, and a constraint boundary adjustment mechanism is designed for the preset performance function to solve the problem of control output singularity during input saturation; thirdly, calculating a virtual error, and constructing a virtual control law, an auxiliary control law and a self-adaptive updating law in combination with a backstepping technology, a finite time sliding mode differentiator, an RBFNN and a self-adaptive method; finally, a performance controller is preset through the self-adaptive predefined time, the Lyapunov stability theory and the practical predefined time stability criterion are combined, appropriate design parameters are selected, and it is guaranteed that the closed-loop system is stable within the predefined time, and the tracking error is stabilized within the expected error range. The problems that in an existing control method, the hysteresis model building process is complex, and convergence time is long are solved.

The invention discloses a channel risk management method based on drug circulation data, and relates to the technical field of drug channel risk management, and the method comprises the steps: collecting drug distribution data, pharmacy inventory data and drug sales data of a distribution link; based on the historical data and the current data, segmented risk early warning is carried out on drugs from a manufacturer, a transportation link, an inventory link and pharmacy sales, so that compensation counterfeiting risk identification in a distribution link, channel goods pressing risk identification and goods shortage and return risk identification are accurately realized, and finally, comprehensive risk assessment is carried out based on a segmented early warning result. All channel risk points of medicine circulation can be fully covered, the risk assessment period can be flexibly set, data display board display can be carried out in cooperation with a large screen of a management center with the month as the unit, the week as the unit and the day as the unit, and accurate early warning information and data pushing can be carried out on associated personnel of associated channels in cooperation with APP data intercommunication. Therefore, efficient risk identification and pushing early warning are realized.

According to the BMS test platform and the test method thereof, the cost is low, the safety is high, the controllability is high, the stability is high, the test result is more accurate, and the test efficiency can be improved. The system comprises an industrial control host and a BMS test system cabinet. The BMS test system cabinet comprises a virtual battery simulation unit, a temperature simulation detection unit, a high-voltage constant-voltage source, a high-precision constant-current source, a Hall-shunt simulation detection unit, a CAN communication detection unit, a high-precision programmable DC power supply, an insulation resistance simulation test unit, an insulation withstand voltage test unit, and a signal detection and drive simulation detection unit. An I / O driving detection unit; and a charging signal simulation detection unit. The invention is applied to the technical field of battery management systems.

The utility model provides a wafer clamping jaw base and a wafer clamping jaw, and belongs to the technical field of semiconductors. In order to solve the problem that the wafer carrying mode is limited due to the fact that the types of wafer clamping jaws are difficult to switch, the wafer clamping jaw base comprises a base body, a wafer clamping mechanism and a vacuum control mechanism, and one end of the base body is provided with an installation area used for installing a lifting type clamping jaw body or a vacuum suction type clamping jaw body. The wafer clamping mechanism and the vacuum control mechanism are arranged close to the mounting area; the wafer clamping mechanism is used for being matched with the lifting type clamping jaw body to clamp a wafer, the vacuum control mechanism is used for being matched with the vacuum suction type clamping jaw body to suck the wafer, the vacuum control mechanism comprises a first air channel and a second air channel, and the first air channel and the second air channel are arranged on the two sides of the wafer locking mechanism respectively and penetrate through the mounting area. The wafer clamping jaw can be matched with a lifting type clamping jaw body and a vacuum suction type clamping jaw body at the same time, so that switching of the two types of wafer clamping jaws is achieved, and the flexibility of a wafer carrying mode is improved.

The invention discloses a power flow calculation method and system for a power system, and aims to relax key variables such as part of generator output and node voltage from equality constraints to inequality constraints in order to solve the problem that part of generator output and node voltage are difficult to give due to large-range change of an operation mode in a novel power system; after the inequality constraint is introduced, the power flow model is changed into a novel power system constraint power flow model from an original nonlinear equation set solving problem; converting an inequality in the constraint power flow model into an equation by adopting a method of constructing an auxiliary function, and then converting the constraint power flow model into a bounded constraint least square problem; aiming at the problem that a traditional optimization algorithm is difficult to converge, a trust region algorithm is adopted for solving, and the adjustment amount of variables such as generator output and node voltage and a final power flow solution are obtained. The method can effectively solve the problem that the power flow has no solution due to the fact that the initial power flow value is difficult to give, and theoretical support is provided for planning and operation of a power system.

The invention discloses a power line troubleshooting practical training device which comprises an operation panel and a power supply module. The operation panel is used for arranging wires according to a preset circuit diagram and is detachably provided with a plurality of analog switches, a plurality of fault indicators, a display operation screen, a plurality of fault points, a plurality of data acquisition terminal units and a core control module; the power supply module is used for supplying power to the operation panel; the analog switch simulates switching on and switching off in a manual or automatic mode so as to achieve the effect of power supply switching. The fault point can simulate a fault condition; the fault indicator is connected with a specified fault point; the core control module is connected with the fault indicator and the data acquisition terminal unit, and is used for selecting the fault type and fault point setting of the current simulation line according to the signal of the display operation screen, and simulating the common fault type. According to the invention, a real-time simulation technology is adopted, so that trainees can carry out troubleshooting and processing in an approximately real environment, and thus the fault handling capability is improved.

The utility model belongs to the technical field of cup covers, and particularly relates to an inner plug cover with a magnetic attraction structure, which comprises a cover body, a water flow channel arranged in the cover body, a sealing plug for sealing the water flow channel arranged on the cover body, a driving piece for driving the cover body to move during sliding, and an elastic piece for driving the cover body to reset during sliding, the cover body comprises a connecting seat and an upper shell which are fixedly connected, a mounting cavity is formed in the connecting seat, the connecting seat is arranged in the mounting cavity, an annular water flow channel is formed between the side walls of the mounting cavity, a water outlet hole communicated with the water flow channel is formed in the bottom of the mounting cavity, and the elastic piece drives the sealing plug to reset and seal the water outlet hole; the upper portion of the upper shell extends to the upper portion of the connecting base, magnetic attraction pieces used for attracting the outer cover are arranged on the upper portion of the upper shell, and the magnetic attraction pieces are annularly distributed around the periphery of the mounting groove, and the inner plug cover with the magnetic attraction structure is convenient to produce, machine and use.

The invention provides a live broadcast delay determination method and apparatus, and a terminal device. The method comprises the steps of determining a user type corresponding to a user watching a live broadcast; acquiring network parameters when the user watches the live broadcast; based on the user type and the network parameter, determining a delay parameter when the user watches the live broadcast, the delay parameter being associated with the delay when the user watches the live broadcast; and sending the delay parameter to a multimedia server, and receiving live broadcast data sent by the multimedia server based on the delay parameter.

The invention provides a real-time flame and smoke detection method based on YOLOv8. The method comprises the following steps: S1, data acquisition: acquiring flame and smoke images in real time; s2, constructing a flame and smoke detection model: adding an ECA attention mechanism to the Backbone part of the YOLOv8 model, and adding a CBAM attention mechanism to the Head; s3, flame and smoke detection results are obtained, wherein the preprocessed to-be-detected flame and / or smoke images are input into a flame and smoke detection model, and the detection results are obtained; the detection result comprises a smoke value and a flame value. The detection method provided by the invention can ensure high accuracy and low false detection rate in fire detection in various scenes. Compared with an existing deep learning fire detection algorithm, the method can provide a more reliable detection effect when scenes with the background similar to the colors of flames and smoke and fire behaviors of different scales are processed.

The invention discloses a stacked charging cabinet and an identification method of the stacked charging cabinet, the stacked charging cabinet comprises a cabinet group, the cabinet group comprises a top cabinet and a bottom cabinet which are arranged at an interval, a plurality of middle cabinet bodies are stacked between the top cabinet and the bottom cabinet, and the middle cabinet bodies are used for charging a mobile power supply; the upper surface and the lower surface of the middle cabinet body are provided with installation assemblies used for connecting the adjacent cabinet bodies and electric connecting pieces used for electrically connecting the two adjacent cabinet bodies. The installation assemblies comprise the first installation assembly installed on the lower surface of one cabinet body and the second installation assembly installed on the upper surface of the other cabinet body. The electric connecting piece comprises a first plugging terminal arranged on one cabinet body and a second plugging terminal arranged on the other cabinet body; and when the first mounting assembly is matched with the second mounting assembly, the first plugging terminal is matched with the second plugging terminal in a plugging manner. According to the technical scheme, the flexibility of configuration of the number of the mobile power supplies in the charging cabinet is improved by stacking any number of middle cabinet bodies in multiple layers.

The invention discloses an edge-cutting and folding method for a rotary press, which comprises an edge-cutting and folding system for the rotary press, the edge-cutting and folding system comprises a paper pressing wheel, a traction wheel, a cutter mechanism, a page storage roller, a page conveying roller, a folding roller, a paper delivery roller, a paper collecting wheel and a conveying belt, the cutter mechanism comprises a cutting roller and a cutter roller, the cutting roller is provided with a cutting holding needle, and the cutter roller is provided with a cutting holding needle. A paper cutter is arranged on the cutter roller, a page storage holding needle is arranged on the page storage roller, a page conveying holding needle is arranged on the page conveying roller, an edge cutter and an edge cutter pad are arranged on the folding roller, and the edge cutter and the edge cutter pad are fixed on the folding roller through an edge cutter holder; according to the method, a traditional folding method is thoroughly changed, the method not only comprises the functions of cutting and page sleeving, but also has the function of cutting redundant lines on the edge of the ink-jet printing product, cutting aiming at the lines on the edge of the ink-jet printing product is carried out while stacking and page sleeving are completed, and the sleeve page can be directly folded into the needed product after being stacked and subjected to edge cutting.

The invention discloses a GNSS (Global Navigation Satellite System) and wind cloud satellite assisted meteorological and hydrological coupled runoff forecasting method. The method comprises the following steps: 1, GNSS two-dimensional water vapor inversion; 2, performing water vapor inversion on the Fengyun No.4; 3, performing three-dimensional variation assimilation on the precipitable water volume inverted by the GNSS and the precipitable water volume inverted by the FY-4 star A based on a WRF meteorological mode; and 4, runoff forecasting is carried out based on the WRF-Hydro hydrological model. The method is simple in step and reasonable in design, three-dimensional variational assimilation is performed on the precipitable water volume inversed by the GNSS and the precipitable water volume inversed by the FY-4 star A based on the WRF meteorological mode, accurate meteorological driving data is provided for a WRF-Hydro hydrological model, the dependence of WRF meteorological mode data assimilation on conventional meteorological observation data in traditional meteorological and hydrological coupling forecast is avoided, and the method is suitable for popularization and application. And the applicability of the WRF and WRF-Hydro model coupling mode in the meso-and small-scale watershed in the conventional data scarcity region is further improved.

The invention relates to the technical field of data analysis, in particular to an intelligent assessment system and method for safe operation of a silt dam, and the system comprises a data collection module, a data analysis module, an intelligent assessment module and an assessment analysis module. The data analysis module draws a speed time domain graph to determine a historical average speed and a unit speed change frequency in a unit period, and the intelligent evaluation module determines an operation characterization trend to determine an operation characterization state of the silt dam in combination with an upstream and downstream water level difference. Whether safety early warning information is sent out or not is determined according to the operation characterization trend or the operation characterization state, and the assessment analysis module determines a dangerous operation reason according to the judgment result of the dangerous operation state and the upstream and downstream water level difference. Through the functions of real-time monitoring, accurate evaluation, quick response, intelligent analysis and the like, the safety management level of the silt dam is remarkably improved, the safety risk and the maintenance cost are reduced, and powerful technical support and decision basis are provided for inspectors and managers.

The invention is suitable for the technical field of automatic assembly, and provides automatic device assembly equipment which comprises a first feeding module, a second feeding module, a steering wheel assembly, a dispensing module, a first rotary disc assembly and a second rotary disc assembly. The steering wheel assembly is rotatably mounted on the platform and used for receiving a first component, the first rotary disc assembly is rotatably mounted on the platform and used for receiving a second component and driving the second component to rotate, and the second rotary disc assembly is rotatably mounted on the platform and used for receiving the first component from the steering wheel assembly and enabling the second component and the first component after dispensing to be aligned in the axial direction of the second rotary disc assembly; the steering wheel assembly allows the first component to be reversed by 360 degrees, so that the arrangement position, the feeding mode and the like of the first feeding module can be flexibly set, the field requirements of a user can be met, the overall occupied area of the device automatic assembly equipment can be reduced, and the overall integration degree is improved.

The invention provides a train electrician comprehensive practical training system and method. The train electrician comprehensive practical training system comprises an electrical working condition cabinet, a virtual comprehensive control cabinet terminal and a train practical training mechanism. The train training mechanism comprises a charger, an inverter and an electrical comprehensive control cabinet. The electrical working condition cabinet is used for simulating an external equipment signal required by the train practical training mechanism, sending the external equipment signal to the train practical training mechanism, collecting an internal signal when the train practical training mechanism runs and sending the internal signal to the virtual comprehensive control cabinet; the working conditions of the train equipment are displayed through the working condition indicating equipment; the train training mechanism is used for receiving the first target signal, responding to the first target signal and / or training operation, and generating a second target signal; and the virtual integrated control cabinet terminal is used for displaying the virtual integrated control cabinet and synchronizing the real-time states of the virtual integrated control cabinet and the electrical integrated control cabinet, so that safe, flexible and efficient virtual practical training is carried out.

The invention relates to a control strategy debugging system, method and device of a central air conditioning system. The control strategy debugging system of the central air conditioning system comprises a virtual cold station and an AI intelligent control device. The virtual cold station is used for simulating operation of the real cold station to obtain real-time operation parameters; the AI intelligent control device is used for acquiring real-time operation parameters of the virtual cold station; predicting a target load of the virtual cold station based on the real-time operation parameters; performing dynamic parameter optimization based on the target load to obtain multiple groups of energy efficiency control strategies; and performing energy efficiency evaluation in the multiple groups of energy efficiency control strategies to obtain an optimal control strategy. According to the embodiment of the invention, actual debugging in an actual central air-conditioning system is not needed, all-working-condition energy-saving effect debugging and verification can be realized in a laboratory in a factory, the debugging efficiency is greatly improved, and the debugging period is shortened; operation experiment working conditions can be flexibly set, the energy-saving effect of different control strategy combinations is verified, the optimal control strategy is selected, and the operation energy efficiency of the central air-conditioning system is improved.

The invention discloses an image sensor detection method, an image dynamic detection method and a correction method, and the detection method comprises the steps: screening any abnormal pixel point in abnormal cluster points as a center, the number of the second bright spots in the rectangular array area containing the two layers of outer neighborhood single-pixel rectangular rings is smaller than the number threshold value, and the corresponding abnormal pixel points serve as dead pixels; wherein the abnormal pixel point is confirmed by judging whether the gray value of the corresponding pixel channel is greater than or equal to the abnormal pixel point reference threshold value; and screening the corresponding abnormal pixel points of which the outer neighborhood single-pixel annular region is less than three continuous second bright points by taking the corresponding abnormal pixel point reaching the preset number threshold as the center as defective pixels. According to the method, the spatial distribution characteristics of the positive samples and the negative samples are effectively utilized, the positive samples and the negative samples are precisely discriminated in combination with the spatial distribution statistical information, and a reliable correction basis is provided for dead pixel correction.

The utility model discloses a hoisting feeding device and a feeding system, and relates to the field of feeding facilities, the hoisting feeding device is used for feeding to a feeding port, and the hoisting feeding device comprises at least two sets of track supports which are arranged at intervals along the arrangement track of the feeding port, the track support comprises a stand column used for being fixed to a building foundation and a mounting beam fixed to the stand column and extending to the position above a feeding port arrangement track. The hanger rail is arranged according to the arrangement track of a feeding port and is fixed on each mounting beam; and the walking hoisting mechanism is mounted on the hoisting rail and can hoist materials along the hoisting rail. A single-side supporting structure is formed through the rail support, the hanger rail and the walking hoisting mechanism are used as a hoisting and feeding execution body, compared with a traveling hoisting system, the overall structure is light, the requirements for bearing and the structure of the installation environment are low, interference with the surrounding environment is not likely to happen, and all-directional covering of all feeding ports is easy to achieve; and the application scene is wider.

The embodiment of the utility model provides a circuit board and electric equipment, comprising a substrate, at least one side of the substrate is provided with a conductive layer and a solder mask layer, and the solder mask layer is arranged at one side of the conductive layer away from the substrate; a hole is formed in the substrate and penetrates through the conductive layer and the solder mask layer, a window is formed in the solder mask layer at the position corresponding to the hole, the conductive layer at the window is exposed to form a bonding pad part, the hole is used for arranging a fixing piece, and at least part of the fixing piece is in contact with the bonding pad part.

The invention relates to a method and a device for preparing an indigo dyeing BC reducing solution. The technical problem to be solved by the invention is to provide the preparation method and the device of the BC reducing solution for indigo dyeing, which solve the problems encountered in production by adopting a method that the BC solution is instantly dissolved and used, not only can fully dissolve sodium hydrosulfite in the BC solution and quickly and efficiently meet the process conditions of dyeing production, but also can reduce the waste of dye and chemical materials caused by hydrolysis. According to the method, a'small-amount and multiple-time 'material melting mode is adopted, so that the effect of immediately melting and immediately using is achieved, and'fresh' use of the BC liquid is effectively achieved. The chemical material amount each time is controlled to be used up within one hour, so that the hydrolysis loss of the sodium hydrosulfite is reduced, and the stable dyeing control is facilitated. And on-line automatic adjustment and use are realized, and no other manual intervention is needed in the process as long as raw material supply is ensured. Formula setting and conversion are flexible, rapid replacement of new and old BC liquid can be achieved, and dyeing parameters can be adjusted in time. The consumption is more accurate, material melting according to plans is facilitated, and the loss of redundant materials is reduced.