96results about How to "Avoid man-made damage" patented technology

The invention discloses a vehicle intelligent monitoring and recording system and method based on radar and video detection. The system comprises a high-definition camera, radar, an auxiliary light source, a front-end control unit, a backend server and the like. The system adopts a manner that combines the video detection with the radar speed measurement, the high-definition camera realizes vehicle video detecting, recording and picture capturing functions, the radar detects the vehicle driving speed, if the vehicle exceeds the speed, the over-speed snapping evidence is automatically started; the high-definition camera and the radar can realize the vehicle detection and the speed measurement, when one of the functions is invalid, the other manner can be automatically switched, the redundancy heat backup function of the video and the radar detection is realized, the reliability is increased; the auxiliary light source automatically detects the external ray environment and provides a snapping auxiliary light source; the front-end control unit provides functions of GPS time service and equipment management. The vehicle intelligent monitoring and recording system and method based on radar and video detection solve the technical defect that the video detection manner has inaccurate speed detection and low snapping accuracy, and provide the road real-time recording function.

The invention relates to a two-dimensional stratified material based practical saturable absorber and a production method thereof, and belongs to the field of saturable absorbers of lasers. The two-dimensional stratified material based practical saturable absorber comprises a substrate, a high-reflection layer, a saturable absorption layer and a functional layer. One end face of the functional layer is connected with the saturable absorption layer, one end face of the saturable absorption layer is connected with the high-reflection layer, and one end face of the high-reflection layer is connected with the substrate. By the two-dimensional stratified material based practical saturable absorber and the production method thereof, application of the lasers, such as Q-switching, mode locking and optical signal processing, is realized. By the high-reflection layer formed by composite materials, absorption loss is reduced and reflection rate is increased, and optimal material combinations can be found in terms of different wave lengths.

The invention discloses an intelligent test system and method for a metering device circuit board, belongs to the circuit board detection technology field and solves a problem of low efficiency caused by manual detection existing in a metering device circuit board in the prior art. The intelligent test system comprises a programming device used for realizing programming of function programs into a to-be-tested circuit board, a display performance test device used for testing display performance of the to-be-tested circuit board, a function test device used for testing functions of the to-be-tested circuit board, an identification device used for identifying the to-be-tested circuit board according to test results of the display performance test device and the function test device, a circuit board conveying mechanism which is connected with the programming device and is used for conveying the to-be-tested circuit board to the programming device, and a main control unit used for controlling operation of the programming device, the display performance test device, the function test device, the identification device and the circuit board conveying mechanism. The intelligent test system is advantaged in that the intelligent test system is applicable to circuit board tests of various types of intelligent gas meters.

The invention discloses a subsection split phase automatic-passing system of an electric railway and a split phase automatic-passing method of the subsection split phase automatic-passing system of the electric railway. According to the subsection split phase automatic-passing system of the electric railway, a first catenary and a second catenary are connected with a neutral section through a first electric subsection and a second electric subsection respectively, a first current transformer is connected to the portion, close to the first electric subsection, of the first catenary in series, a second current transformer and a first normally-open switch are connected in series, and then are connected to the first electric subsection in parallel, and a third current transformer and a second normally-closed switch are connected in series, and then are connected to the second electric subsection in parallel; a first voltage transformer and a second voltage transformer are connected with the tail end of the first catenary and the tail end of the second catenary respectively; a first pantograph detector is installed on a supporting column of the first current transformer, a second pantograph detector is installed on the first electric subsection, and a third pantograph detector is installed on the second electric subsection; the first current transformer, the second current transformer, the third current transformer, the first pantograph detector, the second pantograph detector, the third pantograph detector, the first voltage transformer, the second voltage transformer and the first normally-open switch are connected with a control unit. The subsection split phase automatic-passing system of the electric railway is simple in structure, small in investment and convenient to implement, subsection split phase automatic-passing operation of the electric railway can be achieved completely and more reliably, and the lockout function is achieved when the subsection split phase automatic-passing system is abnormal.

The invention relates to a process for carburization production of a fiber-reinforced calcium silicate board. The process comprises the following steps: preparation of the following materials: calcareous materials, siliceous materials and fiber materials as main materials and fly ash and silicon powder as auxiliary materials; forming, namely uniformly mixing the raw materials to form slurry and feeding the slurry into a plate blank forming machine for forming and applying a carburization reaction solution or carburization reaction gas to the surfaces of plate blanks; stacking, namely removing rough edges of the plate blanks, then stacking the plate blanks one after another and spraying the carburization reaction solution or carburization reaction gas to each plate blank; static curing, including dry type static curing and / or wet type static curing; autoclave curing, namely putting the plate blanks in a high-temperature high-pressure steam environment; stripping, namely separating the plate blanks one after another; and drying, namely drying the plate blanks one after another, wherein the carburization reaction solution is a solution containing carbonate radicals and bicarbonate radicals; the carburization reaction gas is a gas containing carbon dioxide. The process avoids severe bonding of the plate blanks during production, and is an improved process, and therefore the production efficiency is improved, and the product quality is further improved.

The invention discloses a transverse galling machine and a galling treatment method. The transverse galling machine comprises a walking frame moving the back forward along the longitudinal length direction of a to-be-galled area, a work rack mounted on the walking frame, a transverse move frame that is laid on the work rack and can make leftward and rightward transverse movement on the work rack, a transverse move driving mechanism driving the transverse move frame to do leftward and rightward transverse movement, and a galling tool that is driven by the transverse move frame to do leftward and rightward transverse movement synchronously and conducts transverse galling treatment on a to-be-galled area in the leftward and rightward transverse movement process. The galling treatment method includes: 1. determination of the galling treatment time: determining the galling treatment time of the to-be-galled area; and 2. transverse galling treatment, which consists the process of: 201. putting the transverse galling machine in place; and 202. carrying out transverse galling treatment. The transverse galling machine and the galling treatment method provided by the invention have the advantages of reasonable design, convenient realization and good use effect, can simple and rapidly complete the transverse galling treatment process of the to-be-galled area, and have good galling treatment effect.

The invention discloses an automatic passing phase-separation system and method of an electrified railway. According to the automatic passing phase-separation system of the electrified railway, a first contact net and a second contact net are connected with a neutral section through a first electric subsection and a second electric subsection respectively; the position, close to the first electric subsection, of the first contact net is connected to a first current transformer in series; a second current transformer is connected with a first normally-opened switch in series and then is connected to the first electric subsection in parallel; the position, close to the second contact net, of the second contact net is connected to a fourth current transformer in series; a third current transformer is connected with a second normally-opened switch in series and then is connected to the second electric subsection in parallel; a supporting pillar at the first current transformer is provided with a first pantograph detector; a second pantograph detector is installed at the first electric subsection, a third pantograph detector is installed at the second electric subsection, and a fourth pantograph detector is installed at the fourth current transformer; the first current transformer, the second current transformer, the third current transformer, the fourth current transformer, the first pantograph detector, the second pantograph detector, the third pantograph detector, the fourth pantograph detector, the first normally-opened switch and the second normally-opened switch are respectively connected with a control unit. The automatic passing phase-separation system of the electrified railway is simple in structure, little in investment, convenient to implement, and capable of achieving automatic passing phase-separation of the electrified railway more completely and reliably.

A hidden door closer comprises a casing, an input shaft and an output shaft. The input shaft is connected with a motor. A connecting component is arranged between the input shaft and the output shaft. An upper connecting piece and a lower connecting piece are arranged at two ends of the connecting component respectively. A roller is connected with the upper connecting piece and the lower connecting piece through a vertical rotating shaft. A left connecting piece and a right connecting piece are arranged on the input shaft and the output shaft respectively. The left connecting piece and the right connecting piece are horizontally connected with the roller through a horizontal rotating shaft. The components in the structure are simple in structure and convenient to process and assemble; size of a joint after assembly is equivalent to that of the connecting component, so that overall size is small. During transmission, the output shaft is directly driven the input shaft to rotate through the connecting component, and transmission efficiency is increased. A universal joint structure is employed in transmission connection between the input shaft and the output shaft. The transmission efficiency of the structure is high, the size is small, quality is excellent, cost is low, process is simple, precision is reliable, and the hidden door closer is beneficial to wide promotion.

The invention discloses a bolt device with a state judgment function. The bolt device comprises a cover plate, a bolt base, a positioning pin, a locking nut, a bolt, a connection plate, a sleeve, a spring and a switch. A lead groove is formed in the bolt base, and the positioning pin penetrates the lead groove to be fixedly connected to the large diameter end of the bolt; and by adjusting the position of the positioning pin in the lead groove, the positioning pin moves along a track of the lead groove, and therefore the bolt can rotate in the axial direction and the radial direction in the bolt base. According to the bolt device, the state judgment function is increased, the positioning pin conducts adjustment at the two ends of the lead groove, extending and retracting of the small diameter end of the bolt are controlled, locking and unlocking of external equipment are achieved, changes of the action state of the large diameter end of the bolt and the trigger end of the switch are achieved, whether a trigger signal exists or not in the switch is detected through an external control system, and whether enabling is carried out on external equipment or not can be further controlled; and the intellectualization level of the external equipment is improved, and hidden dangers caused by man-made misoperation are avoided.

The invention discloses a long-term monitoring auxiliary system suitable for perennial frozen areas in a plateau, and the system comprises a protection module and an electricity supply module which are matched, wherein the protection module comprises a long-term monitoring system protection box. The long-term monitoring auxiliary system suitable for perennial frozen areas in the plateau provided by the invention can be used for overcoming the defects that the long-term watching difficulty is great, a monitoring device is easy to damage, long-term stable operation is difficult to realize, the monitoring result has poor reliability and the like can be overcome, so as to achieve the advantages of unmanned watching, good protection performance of the monitoring device, capability of operating stably for a long time, good reliability of the monitoring result.

The invention relates to the processing field of resin diamonds, in particular to novel special equipment for demolding resin diamonds. A feeding conveying mechanism is used for conveying a silicone mold with a resin diamond, a silicone mold deformation mechanism is used for demolding so that the resin diamond can be taken out of a mold hole of the silicone mold rapidly, demolding is operated repeatedly layer by layer, no missing is caused and the efficiency is high; and then, a resin diamond discharging mechanism is used for automatically collecting the demolded resin diamonds, the mold hole can be effectively prevented from being damaged and deformed, the bottoms of the produced flat-base resin diamond are flat and can be coated conveniently, industrial automatic operation can be carried out, the manual operation cost is greatly reduced, the molds and the products can be prevented from being damaged by humans, and the interference of outside adverse factors is reduced; besides, a silicone mold recovery mechanism is used for automatically collecting the silicone molds, therefore, the silicone mold can be utilized repeatedly and circularly; when the silicone molds are used again, residues and attached resin diamonds in the mold holes do not need to be cleaned again, the period is shortened, the production efficiency is improved and the labor cost is lowered.

An automatic fruit picking device based on information traceability relates to a picking device and a method. The device comprises a visual recognition device, a QR code pasting device, an automatic picking device and a fruit picking robot, wherein the automatic picking device is connected with a fruit collection box through a conveying hose, the visual recognition device, the QR code pasting device and the automatic picking device are respectively installed on the fruit picking robot; the visual recognition device is connected with the input end of the fruit picking robot, and the output endof the fruit picking robot is respectively connected with the QR code pasting device and automatic picking device. The method includes the steps of determining the position and maturity of the fruit on a fruit tree by the visual recognition device, activating the QR code pasting device to paste planting information, starting the automatic picking device to pick the fruit, and conveying the pickedfruit through the conveying hose to the fruit collection box. The invention can realize automatic picking and quality tracing of fruits, and has great promotion value.

The invention discloses a method for protecting an underground pipeline during pipe ditch excavation and belongs to the technical field of electric power engineering construction technologies. The construction method includes the steps that firstly, two steel structure supports are prefabricated and an I-beam steel rail is prepared; then the steel structure supports are hoisted to two sides of a trench, the I-beam steel rail is hoisted to the upper portions of the steel structure supports to be parallel to the pipeline and be located over the pipeline; mud wrapping the pipeline is cleaned up and a protective steel board is mounted in place; and a hanger is mounted onto the I-beam steel rail and carries out suspending protection on the pipeline through the protective steel board. By adoption of the scheme in the construction process, the security of the pipeline is ensured during earth excavation construction, and normal operation of construction is facilitated; besides, the preparation time of construction can be greatly shortened, and the engineering cost can be reduced.

The invention relates to a preparation method of silicosis mouse models. The preparation method of the silicosis mouse models is characterized in that after experiment preparation, isoflurane in an anesthesia machine is adopted to anesthetize mice in a model group, 3 seconds after rapid-shallow breaths of the mice become deep and slow, each mouse is taken out and placed at the center of a palm, the tip of a thumb presses against the underjaw of each mouse, a micropipette is adopted to instill a SiO2 micro-sized particle suspension through the nose of each mouse, the SiO2 micro-sized particle suspension is instilled into the nose wings to be absorbed, closed-chest massage is conducted for 2-3 minutes, then the mice are placed into cages, and after an experiment is finished, the mice are sent back to a normal-temperature animal feed room; only normal saline of the same volume is used for conducting nasal inhalation on mice in a contrast group; weight indexes of the mice are obtained before and after the experiment, the mice are killed at the first week, the second week, the fourth week, the eighth week and the sixteenth week respectively, lung tissue is taken to be pathologically andbiochemically compared and identified, and a model preparation effect is evaluated. According to the preparation method of the silicosis mouse models, a model production technology is stable and efficient; the method can be repeated many times and is noninvasive, environmentally friendly and humanistic, and labor and time are saved.

The invention discloses a security camera, which comprises a camera and a base, wherein the base is arranged on a wall body and is provided with a rotary motor, a tension sensor, a microprocessor and a buzzer; the rotary motor is connected with one end of a screw rod and the other end of the screw rod is provided with a sealed shell; a camera, a wireless transmission module, a temperature sensor and a humidity sensor are arranged in the shell; the camera is connected with the wireless transmission module; and a dust collector is arranged outside the shell. The security camera has an automatic alarming function and a dust collection function, the condition of artificial damage is avoided, the labor intensity of people is reduced, and the security camera is long in service life and stable in performance.

The present invention discloses microsurgery forceps with double forceps heads capable of clamping and fixing, and belongs to the technical field of medical equipment. The microsurgery forceps are used for performing clamping and fixing operation. The technical scheme is that the double forceps heads capable of clamping and fixing are added to traditional operating forceps, blood vessel or nerve can be clamped by clamping pieces at front ends of the forceps heads, the clamping pieces are connected with pull rods, a stay cable and pull rings, and a clamping spring is disposed between the two clamping pieces. After the blood vessel or the nerve is clamped by the forceps heads, the forceps heads at two sides are shut towards the middle by closing handles at two sides of the operating forceps, so that anastomosis butt joint of two broken ends can be achieved. The microsurgery forceps are reasonable in structure, simple and flexible in operation and firm in fixation, the blood vessel can be prevented from being repeatedly clamped during an operation, man-made damage can be prevented, and one-man operation of clamp, measurement, anastomosis and fixation is achieved. The microsurgery technology is innovated, the disadvantages in a microsurgery operation that broken ends of blood vessel and nerve are poorly anastomosed, and specially-assigned person auxiliary operation is usually required are effectively prevented, operation time is shortened, and patient pain is effectively relieved.

The invention discloses an LED fluorescence emission spectrum-based surface temperature measurement method, and relates to the field of light emitting diode surface temperature measurement methods. The method comprises the following steps of (1) carrying out region division on a normalized emission spectrum of a fluorescent material and integrating each region, wherein the obtained fluorescent material transmitting power is recorded as Pe; (2) testing the current influence degree of the transmitting power Pe of each integral region, and selecting the integral region with the minimum current influence degree as a detection region; (3) taking 1-3% of a rated current value as small current to supply power to an LED sample, acquiring the emission spectrum of the fluorescent material by using aspectrograph, and establishing a linear relationship between the transmitting power Pe of the detection region and the temperature T of the emission spectrum; and (4) under the practical working state of the LED sample, substituting the transmitting power Pe value of the detection region into a relational expression of Pe and T so as to obtain the surface temperature of the fluorescent material.According to the method, a non-contact method is adopted to measure the surface temperatures of fluorescent materials, so that the influences of LED device packaging are avoided and the reliability ishigh.

The invention relates to a three-dimensional transfer station type garbage collection, storage and treatment system, which comprises garbage collection and storage equipment and treatment equipment; the treatment equipment is used for controlling the garbage collection and storage equipment; the garbage collection and storage equipment comprises a full-automatic storage system, a deodorization andsterilization system, a drained water collection system, a rainwater collection system, a fire extinguishing system, an advertising system, a video monitoring and voice reminding system and a fault detection and central monitoring system. The system breaks through traditional garbage collection extensive management, realizes full-closed storage of garbage, is high in intelligent degree, full-automatic in processing, safe and reliable, breaks through a data island of an environmental sanitation collection terminal, and promotes comprehensive supervision of environmental sanitation work.

The invention relates to a wired mobile user terminal. It includes: telephone section the same as static network telephone that includes: wired mobile user identified card, card reader, processor, modulator demodulator, composite circuit and terminal contacting plug; a wired mobile exchanging system that includes: wired ownership user location register, rights identification center, wired mobile exchanger, wired access user location register and operation maintaining center; a wired mobile communication system that includes: wired mobile user terminal and one or plural mentioned wired mobile exchange system; a wired mobile telephone local network constituted by the mentioned wired mobile communication system and integrated wired telephone public network. The number carried wired mobile user terminal in the communication system could connect to any none-number carried wired mobile public user line for incoming call and outgoing call.

The invention relates to a protective cover of an exposed electric cable. The protective cover comprises a body with a center through hole. The body is of a square tubular structure. Through holes which are arranged along the axial direction of the body are formed in the four corners of the body respectively. Steel columns are arranged in the through holes respectively. The protective cover is simple in structure, the electric cable is protected through a steel column enhanced structure, man-made damage is effectively prevented, and the electric cable is prevented from being stolen. The protective cover has the advantages of being low in cost and convenient to use.

The invention discloses a take-up type new energy charging pile which comprises a pile body, a take-up reel and an assembly plate are installed in the pile body, a heat dissipation mechanism connected with the assembly plate is arranged in the pile body, a torque spring is fixedly connected between the outer wall of the take-up reel and the inner wall of the pile body, and a charging wire is wound around the take-up reel. A charging gun is connected to the end of the charging wire, a containing opening is formed in the outer wall of the pile body, the charging gun is located in the containing opening, a rotating plate is rotatably connected to the inner top wall of the containing opening through a rotating shaft, the outer wall of the rotating shaft is fixedly sleeved with a gear, and a transverse plate is fixedly connected to the outer wall of the lower end of the pile body. In the charging process, the charging wire is automatically abutted, the charging gun is prevented from being separated from the charging port, the charging wire is automatically withdrawn and wound on the take-up reel when charging work is finished, meanwhile, the rotating plate rotates downwards to protect the charging gun, damage to the charging wire and the charging gun is avoided, and the service life of a pile body part is prolonged.

The invention relates to an electric power battery panel detecting and packaging machine which comprises an equipment table body. A battery panel storage and push-out mechanism, a battery panel inputmechanism, an electric power performance detection mechanism, a battery panel detection and conveying mechanism, a waste product output belt, a length detection mechanism, a width detection mechanismand a battery panel output inferior-quality product collection mechanism are arranged on the upper portion of the equipment table body, wherein the waste product output belt, the length detection mechanism, the width detection mechanism and the battery panel output inferior-quality product collection mechanism are arranged on the front side of the battery panel detection and conveying mechanism insequence, and a battery panel packaging input mechanism, a battery panel packaging mechanism, a packaging bag input mechanism and a finished product output belt arranged on the lower portion of the battery panel packaging mechanism are further arranged. According to the electric power battery panel detecting and packaging machine, a manual assembly line type production mode of electric power battery panel detection and packaging is replaced, automatic machinery integrated production of electric power battery panel detection and packaging is realized, the labor investment is reduced, the product detection and packaging efficiency is improved, the manual damage to battery panels and packaging bags during manual operation is avoided, the detection quality of the battery panels is ensured, and the waste of raw materials is avoided.

The invention relates to the field of product packaging and boxing, in particular to a full-automatic barreled edible oil boxing production line. The full-automatic barreled edible oil boxing production line comprises a control part, a pneumatic system and a conveying device which is provided with a packaging box processing system used for opening, boxing and closing of packaging boxes; the control part is electrically connected with the pneumatic system and the conveying device, controls the pneumatic system to provide power for the packaging box processing system, and controls the conveying device to drive the packaging boxes to move; the conveying device conveys empty packaging boxes and packaging boxes loaded with oil barrels; manual oil barrel carrying is not needed; and the packaging box processing system achieves full automation of the whole process of opening, boxing and closing of the packaging boxes, the work efficiency is high, mechanical operation avoids man-made damage to products, and economic losses are avoided.

The invention discloses a connecting device for transmitting power. The connecting device comprises a motor assembly, a hydraulic transmission assembly, and a connecting assembly arranged between themotor assembly and the hydraulic transmission assembly. The connecting assembly comprises a power transmission shaft, a power connection disc and a torque converter which are sequentially arranged. Alarge end plate of the power transmission shaft is connected with the power output end of the motor assembly through an output flange, and the tip of the small end of the power transmission shaft is fixedly connected with the power connection disc through a connecting piece. The connecting assembly arranged between the motor assembly and the hydraulic transmission assembly is compact in structureand reasonable in layout, all parts of the connecting assembly are easy to manufacture and low in machining cost, mounting and dismounting are convenient, the reliability requirements of radial and axial connection when the motor assembly and the hydraulic transmission assembly realize power transmitting through the connecting assembly are met, and the power transmitting effect is good.

The invention discloses a multifunctional self-service car washer and a billing method. The car washer comprises a control module, a water supplying module, a cleaning mixed liquid supplying module, a charging module, a billing module and a cleaning tool, wherein the cleaning tool comprises a water gun and a brush; the water gun and the brush are connected with the water supplying module and the cleaning mixed liquid supplying module through pipes; each of the water gun and the brush is provided with a selecting switch for selecting water or cleaning mixed liquid; the billing module comprises a water metering unit and a cleaning mixed liquid metering unit; and the water metering unit and the cleaning mixed liquid metering unit respectively meter the using amount of water and the using amount of cleaning mixed liquid independently. According to the scheme, the multifunctional self-service car washer is provided with the brush, a user can easily clean a car body, a cleaning effect of the multifunctional self-service car washer is far higher than a cleaning effect of a self-service car washer with a single water gun, and the washed car body is clean and does not have spots or marks; metering and billing on the water are separated from metering and billing on the cleaning mixed liquid, the water and the cleaning mixed liquid are billed respectively, waste is avoided, and environmental protection is facilitated; and the designed structure of the brush is unique, the brush is easy to use and can be used for cleaning the car body thoroughly, particularly, water and energy can be saved, the market prospect is wide, and the environmental protection significance is far-reaching.

The invention provides a robot suitable for detecting underwater and overwater parts of a bridge pile foundation and a control method. The robot comprises a rack, holding mechanisms, a walking mechanism, a rotating mechanism, an adjusting mechanism, an observation mechanism and the like. An upper layer holding mechanism and a lower layer holding mechanism are arranged, each layer is composed of two parts which are symmetrical left and right, every two parts are connected through a middle power source and a commutator, torque output by the power sources is converted into two holding lead screw mechanisms which are installed on guide rails in the left horizontal direction and the right horizontal direction, and the holding lead screw mechanisms move to drive holding blocks connected to the holding lead screw mechanisms to move left and right. The upper layer holding mechanism and the lower layer holding mechanism are installed on the walking mechanism, two ends of the walking mechanism are fixed on the rack, one end of the walking mechanism is fixedly connected with one layer of holding mechanism, a movable walking nut is connected with the other layer of holding mechanism, the holding mechanism connected with the movable walking nut is driven to move up and down through vertical movement of the movable walking nut on a walking lead screw, and the robot moves up and down along the pile foundation in cooperation with holding and loosening of the holding mechanisms.

The invention relates to the technical field of advertising, in particular to a multifunctional bulletin board. A glass plate is parallelly arranged on the front end surface of a baseplate, a gap is reserved between the glass plate and the baseplate, a frame is connected to the periphery of the glass plate, and supports are connected to the left side and the right side of the frame; a supporting plate is connected to the top of the frame through bolts, two first electric push rods are fixedly welded to the top of the supporting plate, and an alarm is connected to one side of the correspondingfirst electric push rod through bolts; a top cover is fixedly welded to the tops of the first electric push rods, a storage battery is connected with the interior of the top cover, and a groove is formed in the lower surface of the top cover; a partition plate is arranged in the groove, second electric push rods are fixed to the bottom of the partition plate, and heat dissipation fans are connected to the bottoms of the second electric push rods. According to the multifunctional bulletin board, self-protection of the bulletin board can be achieved, damage to the bulletin board can be lowered,user-friendliness design is made for the bulletin board in many ways, and the bulletin board provides more convenience for people to stop and read for a long time, which helps to improve the propagandization effect.