199results about How to "Implementation constraints" patented technology

The invention belongs to the pipe support field and specifically discloses a pipe single-arm sliding / guiding support component, which includes a pipe clip to clip the pipe and a single-arm structural beam; one end of the single-arm structural beam is fixedly connected with a single-rail sliding limit component so that the single-arm structural beam can be fixed on a post, a wall or a floor, etc.; the pipe clip is connected with the other end of the single-arm structural beam by a pipe connecting component to realize the sliding / guiding limitation required by the pipe. The support component provided by the invention occupies smaller area, and is convenient to arrange, and is not limited by the distance from the pipe to the support root, which reduces the unfavorable influence on the pipe caused by the friction between the support component and the unfavorable influence on the heat insulation of the pipe caused by the support.

The invention relates to a large-caliber optical reflector with a back flexible supporting structure. The problems that too much supporting links exist, the assembling process is complex, the size andthe quality of the supporting back plate are too large in the existing large-caliber reflector back multi-point supporting technology, and the requirement for surface type precision is high under theworking conditions of gravity release and environment temperature change is difficult to be ensured at the same time are effectively solved. The reflector comprises a reflector mirror body, flexiblesupports and a supporting back plate, the number of the flexible supports is three, and the flexible supports are uniformly distributed between the reflector mirror body and the supporting back platein the circumferential direction; each flexible support comprises an isosceles triangular bottom frame and a trapezoid vertical frame which are perpendicular to each other; the three vertexes of the isosceles triangular bottom frame are connected with the back of the reflector mirror body; the top edge of the trapezoid vertical frame is connected with the isosceles triangle bottom frame, the bottom edge of the trapezoid vertical frame is connected with the side surface of the supporting back plate; and the bottom edge of the trapezoid vertical frame adopts a flexible hinge structure, and the two waist parts of the trapezoid vertical frame are correspondingly of a flexible reed structure.

The embodiment of the invention discloses a sheet medium processing device which comprises a stander, an input mechanism installed on the stander, a stacking mechanism and a switching mechanism, wherein the stacking mechanism is positioned at the downstream of the input mechanism, and comprises an upper channel, a lower channel and a channel driving mechanism; the lower channel is fixedly connected with the stander, the upper channel is articulated with the stander, and one end of the upper channel can be separated or contacted relatively to the lower channel; the channel driving mechanism isused for driving the upper channel and the lower channel to do synchronous motion and transmitting a sheet medium; the switching mechanism comprises a first cam and a cam driving mechanism; and the first cam is in lap joint with the upper channel and is used for driving the upper channel to rotate. The embodiment of the invention uses the switching mechanism to adjust the position relationship between the upper channel and the lower channel of the stacking mechanism, so that different transmitting directions can be formed, and the sheet medium can be transported into different destinations according to the requirement.

The invention discloses an optimal input-saturation-resistant control method based on sliding-mode control for a quadrotor aircraft. A sliding-mode control method is provided by combining the optimal control since actuator saturation exists in the quadrotor aircraft. On the premise of ensuring that a referred performance index function J achieves an optimum value, system sliding-mode surface parameters and switching time are obtained through calculation, a corresponding sliding-mode surface and sliding-mode control law are designed through comparing the switching time, thereby the optimal controller is formed. The optimal input-saturation-resistant control method simplifies the design steps of the controller by solving an inequation, allows the referred control law to be the optimal control under the condition of actuator input saturation according to the performance index function J, effectively increases control precision and response speed of the quadrotor aircraft, and can provide controller design basis for the quadrotor aircraft with actuator input saturation. The optimal input-saturation-resistant control method is used for input-saturation-resistant control of the quadrotor aircraft with parameter uncertainties and external disturbance.

The invention discloses a universal auxiliary welding device for microwave antennas, and belongs to auxiliary welding devices. By the universal auxiliary welding device, problems that component parts of a microwave antenna cannot be completely fixed by the aid of an existing auxiliary welding device, and the existing auxiliary welding device is poor in universality are solved. The universal auxiliary welding device is characterized in that a support of the universal auxiliary welding device can transversely move along a base and can be fixed, a center hole and positioning holes are formed in an adjusting disc connected with the support, and the positioning holes are circumferentially and uniformly distributed; a rotary shaft penetrates the center hole of the adjusting disc and a longitudinal shaft hole of the support, and positioning dowels are arranged at two ends of a transverse positioning rod of the rotary shaft; one end of a sliding plate penetrates the rotary shaft, and pressure plate screws at the other end of the sliding plate are connected with a lower pressure plate and an upper pressure plate; a clamp plate can longitudinally move along the base and can be fixed, a longitudinal clamping opening and a horizontal transverse sliding groove are formed in the clamp plate, and a push pin is arranged in the transverse sliding groove. The universal auxiliary welding device has the advantages that the height and an angle of the universal auxiliary welding device can be adjusted conveniently, so that the universal auxiliary welding device is adaptable to dimensional and angular difference among different types of microwave antennas, various parts of components of the antennas can be completely constrained, the radiating performance is excellent in a welding procedure, and accumulated solder paste can be cleaned conveniently after welding.

The invention discloses a pedestrian re-identification method based on an improved YOLOv3 network and feature fusion, and mainly solves the problems of low retrieval precision and low speed of specific pedestrians in a video monitoring scene in the prior art. According to the scheme, the method comprises the steps of 1) constructing a pedestrian picture data set; 2) establishing an improved YOLOv3network; 3) establishing a pedestrian re-identification network fusing global features and multi-scale local features; 4) training an improved YOLOv3 network and a pedestrian re-identification network by using the data set; 5) fusing the two networks trained in the step 2) and the step 3) to obtain a pedestrian re-identification system; and 6) inputting the monitoring video and the to-be-retrieved target pedestrian picture into a pedestrian re-identification system, retrieving the to-be-retrieved target pedestrian, and outputting a re-identification result of the target pedestrian. Accordingto the method, the sensitivity to pedestrians with different postures is enhanced, the retrieval speed and precision of pedestrian re-identification are improved, and the method can be used for regional security and protection, criminal investigation, video monitoring and behavior understanding.

The invention provides a changing device of an extrusion container assembly. The changing device comprises an electric cylinder and a clamping part, wherein the electric cylinder is fixed on an extrusion container guiding support; the clamping part is connected with an output shaft of the electric cylinder and can do a rectilinear motion along with the output shaft, when the clamping part moves to be contacted with a groove of the extrusion container assembly, the changing device of the extrusion container assembly is in a clamping state, and the extrusion container assembly is clamped on an extrusion container shell; when the clamping part moves to be separated from the groove of the extrusion container assembly, the changing device of the extrusion container assembly is in a loosening state, and the extrusion container assembly is separated from the extrusion container shell. The changing device of the extrusion container assembly provided by the invention has the advantages that the electric cylinder controls the clamping part to do a rectilinear motion between the loosening state and the clamping state to realize the release or constraint of the extrusion container assembly, and thus the extrusion container assembly is changed; according to the invention, the changing efficiency is greatly improved, the structure is simple, and the operation is convenient.

The invention relates to an automatic positioning device for the lower end of a steel pipe column in underground building and digging construction. The automatic positioning device is formed by the assembly welding of formed steel, forms a crossed conicity and mainly comprises conical guide plates and a positioning four-bladed vane. The four conical guide plates are uniformly distributed on the positioning four-bladed vane around the circumference in 90 degrees, and vertically and fixedly connected with the positioning four-bladed vane. The center of the positioning four-bladed vane is provided with a center point hole, the circumambience of the positioning four-bladed vane is provided with an elevation hole, a positioning bolt hole, a horizontal positioning nut and a foreseen hole for a foundation plate, wherein the conical guide plates realize the delivering function for the steel pipe column, control the verticality of the steel pipe column, and limit the horizontal displacement of the steel pipe column, and the positioning four-bladed vane supports the steel pipe column and controls the horizontal position and the height mark of the steel pipe column. The invention has the advantages that after being arranged on a pile foundation work, the automatic positioning device can realize the functions of delivery, limitation and accurate positioning for the steel pipe column by the construction features, thereby the steel pipe column can be simply, rapidly and accurately installed.

The invention provides a centering and clamping device for the internal surfaces of sleeve workpieces, and belongs to the technical field of machining. The centering and clamping device comprises an ejection rod, a gear, a rack, a frustum, a pull rod, a pressing plate and an elastic conical barrel. The frustum is installed in a frustum mounting groove in the upper end of a supporting sleeve in a threaded mode. The ejection rod is arranged in an ejection rod sliding chute of the supporting sleeve in an up-down sliding mode. The inner side of the gear and a multi-head trapezoidal thread section at the lower end of the ejection rod are matched through a multi-head trapezoidal thread pair. The rack is arranged on a rack guide base in a slideable mode and is further engaged with an external gear at the outer side of the gear. The pull rod is arranged on a pull rod sliding chute of the frustum in an up-down sliding mode. The elastic conical barrel is arranged on the frustum in a slideable mode. The pressing plate is installed at the upper end of the pull rod. The lower end face of the pressing plate is attached to the upper end face of the elastic conical barrel. The upper end of a compression spring is attached to the lower end face of the pressing plate, and the lower end of the compression spring is attached to a spring supporting groove above the frustum. By means of the centering and clamping device for the internal surfaces of the sleeve workpieces, the internal surfaces of the sleeve workpieces can be centered and clamped quickly, the clamping effect is good and the applicability is high.

The invention discloses a constraint bed for a patient suffering from manic neuropathy. The bed comprises a base plate, the lower surface of the base plate is fixedly connected with the tops of two third fixing rods separately, the bottoms of the third fixing rods are fixedly connected with the upper surface of a driving device, one end of the driving device penetrates through a first pulley and is fixedly connected with the lower surfaces of fixing plates, the upper surfaces of the two fixing plates are fixedly connected with the left end and the right end of the lower surface of a rubber plate respectively, a sponge mat is arranged on the lower surface of the rubber plate, and the left end of the first pulley is fixedly connected with the right side face of the base plate. According to the constraint bed for the patient suffering from the manic neuropathy, by means of the combined action of a motor, a take-up reel, a pulling rope, the fixing plate, the sponge mat, a second pulley andthe rubber plate, the rubber plate constrains the patient suffering from the manic neuropathy, the mode that multiple people forcibly press the patient or tie the patient with the rope is avoided, and then the action of the patient is constrained and the body of the patient is not hurt, and convenience is brought to nursing personnel.

The invention discloses an electric-magnetic field synergetic enhancement high-power pulse magnetron sputtering deposition device and method, and belongs to the technical field of coating. In order tosolve the problems that according to an existing high-power pulse magnetron sputtering method, the electron utilization rate is low, the deposition rate during coating is low, and system particle ionization rate remains to be further increased, according to the deposition device, an excitation coil is wound around the outer side of a cathode magnetic control target, a direct current and constantcurrent power source supplies continuous and adjustable current to the excitation coil at the outer side of the cathode magnetic control target, an auxiliary anode is placed into a vacuum chamber, anda direct current and constant voltage power source supplies continuous and adjustable voltage to the auxiliary anode inside the vacuum chamber; according to the deposition method of the deposition device, the coaxial excitation coil is used for optimizing distribution of a magnetic field in front of the cathode magnetic control target, meanwhile, the auxiliary anode is used for controlling distribution of an electric field / potential inside the vacuum chamber, directional electron pulling and restraining can be achieved, then, the purposes of improving the electron utilizing rate of the high-power pulse magnetron sputtering technology and the deposition rate and further increasing the system particle ionization rate can be achieved, and a high-quality coating is deposited. The electric-magnetic field synergetic enhancement high-power pulse magnetron sputtering deposition device and method can be used for the technical field of coatings.

The invention relates to the field of general assembly of girder sections of steel box girders, in particular to a tool installation mould for upside-down construction of a multi-curve superimposed steel box girder and a construction method thereof. The tool installation mould for the upside-down construction of the multi-curve superimposed steel box girder includes a box body, an upper column and a lower column are fixed to the box body and located on and under the box body respectively, and the lower end of the lower column is fixed into a base; the box body is internally provided with a worm wheel and worm mechanism, lead screws positioned inside the upper column and the lower column are arranged on worm wheels, and the top portions of the lead screws are provided with supporting heads. The adjustable mould has excellent universality, and by utilizing the self-locking and adjustable properties of the adjustable mould, the adjustable mould can serve as an adjustable moulding bed support for changes of curved section frame lines and be adjusted in the vertical direction.

The invention discloses a roller bearing retainer, and relates to the technical field of roller bearings. The roller bearing retainer comprises a retainer main body as well as circular ring shaped retainer baffle plates which are connected to the two sides of the retainer main body, and are matched with the shape of the retainer main body, wherein through holes which communicate with pocket holesare formed in positions, corresponding to the pocket holes, in two side end surfaces of the retainer main body; a bulged column which is matched with each through hole is arranged on the correspondingposition of each retainer baffle plate; the retainer main body and the retainer baffle plates are connected through the bulged columns and the through holes; supporting balls and springs are outwardssequentially arranged in the through holes in the two sides of a roller bearing from the roller bearing; and the supporting balls abut against in concave surfaces at the two ends of the roller bearing. The roller bearing retainer has the beneficial effects that a roller bearing adopting the structure of the retainer is simple in structure, is small in impact load, supplements lubricating oil conveniently, and has a lubricating oil self-supplementing function in an operation process.

The invention discloses a constraint compliance control method for a space double-arm robot. A kinetic model of the space robot is derived; a double-layer compliant structure for adjusting expected movement is designed, and compliance of target operation and extrusion between mechanical arms is coordinated; by designing an obstacle Lyapunov function, constraint tracking of an expected trajectory is realized; and, finally, the effectiveness of the method provided by the invention is verified through examples. According to the method, compliance between target operation and mechanical arm extrusion is achieved by generating the compliance expected track, the control performance of joint tracking expected movement is restrained, and reliable double-arm compliance stable control over the captured non-cooperative target is achieved.

The invention discloses a local smooth trajectory planning method based on a bent cylindrical coordinate system, and belongs to the technical field of unmanned carrier trajectory planning. According to the method, the problems of poor track continuity and smoothness and difficult track constraint of an existing unmanned vehicle local path planning method in a three-dimensional space are solved. According to the method, a smooth global path is planned according to map information and unmanned carrier target task requirements; taking the global path as a base line, and creating a bent column coordinate system; converting the motion state information of the unmanned vehicle from a global coordinate system to a bent column coordinate system; according to the global path, planning a local motion trail of the unmanned vehicle in future time T by utilizing a cost function and time space discretization; deleting the local motion trails which collide with the obstacle and exceed the power constraint range of the unmanned vehicle, and taking the local motion trail with the lowest cost function value as the optimal motion trail of local planning. The method is suitable for planning the localmotion trail of the unmanned vehicle.

The invention discloses a federal learning method and system for a data non-independent identically distributed scene. The system comprises a plurality of clients and a central server. The central server is used for dividing a target data set into a plurality of sub-data sets in a non-independent distribution mode, so that each sub-data set contains all types of data, and distributing the sub-data sets to the client; the client is used for guiding the sub-data set to train a current local model according to a current local anchor point based on the received sub-data set, updating parameters of the local anchor point and the local model, and uploading model data to the central server according to an agreed communication mode; the central server is further used for aggregating according to the received model data to obtain aggregated data, and downloading the aggregated data to the client according to an agreed communication mode to serve as the basis of the next round of federated learning, the method improves the practicability of the federated learning system in a specific scene on the basis of guaranteeing the safety of user data, and improves the user experience. Meanwhile, the problems of communication efficiency and statistics heterogeneity of a federated learning system are solved.

The invention belongs to the technical field of produce planting, and discloses a grafting method of bitter gourds. The method comprises the steps of construction of a device for grafting, seed treatment, sowing, grafting and management after grafting, wherein fixation is conducted in the process of bitter gourd grafting by means of a fixing device for bitter gourd grafting, so that the situation that the bitter gourds break off is avoided. The problems that in the prior art, the bitter gourds are likely to break off after grafted, and thus the survival rate of bitter gourd grafting is low are solved.

The invention relates to the technical field of task scheduling, in particular to a cloud edge collaborative manufacturing task scheduling method based on an intelligent Agent, which comprises the following steps that S1, a manufacturing task to be scheduled is input into a constructed target decision model; s2, the cloud computing module decomposes the manufacturing task into a plurality of subtasks; then the service quality index of each subtask is constrained to obtain a preliminary scheduling scheme; s3, the edge management and control module detects the disturbance condition of each production line, and if fault disturbance exists in a certain production line, the step S4 is executed; if the fault disturbance does not exist in each production line, the step S5 is executed; s4, the cloud computing module reconstrains the service quality indexes of the subtasks corresponding to the production line to obtain a rescheduling scheme; and finally the step S3 is executed. and S5, scheduling of the manufacturing tasks is completed. According to the cloud edge collaborative manufacturing task scheduling method based on the intelligent Agent, constraint on service quality indexes and disturbance adjustment can be achieved.

The invention relates to the technical field of friction welders, in particular to a small friction welder for frame foundation construction. The small friction welder comprises a base. A protection cover is arranged on the outer wall of the base. An electric hydraulic cylinder is arranged in the protection cover. A shaft body of the electric hydraulic cylinder penetrates through the outer wall ofthe base. One end of the shaft body of the electric hydraulic cylinder is connected with a first clamping plate. The first clamping plate clamps a bottom connected workpiece. A hole, for the shaft body of the electric hydraulic cylinder to penetrate through, of the base is internally provided with a silica gel heat conduction sleeve. A heat conduction rod is arranged on the outer wall of the silica gel heat conduction sleeve. The small friction welder has the advantages that the size is small, two workpieces are clamped by two clamping plates correspondingly, a rotating mechanism is added into a top base to drive one workpiece to rotate at a high speed so that friction welding can be realized, the small friction welder is more suitable for the building construction field, and the application range of the friction welder is enlarged.

In order to limit bending load applied to a shearing member of an energy absorbing mechanism, a shear pin (24) is inserted into both axial holes (9b, 18a) in the axial direction and an external threaded portion (24c) is screwed into and fixed to an internal threaded portion (9c). The shear pin (24) is thus securely fixed to a spool (9). As a relative rotation is generated between the spool (9) and a locking base (18), shearing load acts on the shear pin (24). Since the shear pin (24) is fixed to the spool (9), the shear pin (24) is prevented from moving in a direction of coming off the spool (9). This prevents the locking base (18) from being spaced apart from the spool (9) so that no bending load acts on the shear pin (24) and only shearing load acts on the shear pin (24). Therefore, the load limiting action of the shear pin (24) can be performed substantially only by shearing deformation.

The invention relates to the technical field of spaceflight, and discloses a pressing and releasing mechanism which comprises a base, a sliding block, a locking assembly, a pulling releasing assembly,a separating piece; the base is arranged on a satellite body or an aircraft body; an unlocking releasing cavity is arranged in the base; the sliding block is in sliding connection with the internal wall of the unlocking releasing cavity; the locking assembly is pressed by the sliding block after sliding tightening, and one end of the locking assembly is limited and pressed into the unlocking releasing cavity, the other end of the locking assembly is used for pressing a pressing piece onto the satellite body or the aircraft body; the pulling releasing assembly is arranged on the base, and canpress or unlock the abut contact of the sliding block and the locking assembly; and the separating piece is connected between the locking assembly and the pressing piece and is used for enabling the locking assembly to be disengaged from the unlocking releasing cavity. The pressing and releasing mechanism is quick in response during working, small in generated impact, free of pollution and capableof being repeatedly used.

Provides an anti-falling thermos bottle that is easy to replace the inner liner. It has a body shell, a handle, a handle, a base, a spout shell, an inner liner and a cork. The shell and the pot body shell are transitionally connected by a stepped threaded fixing ring that is socketed and constrains the inner tank; the stepped threaded fixing ring is composed of large and small diameter external thread connecting rings Ⅰ, Ⅱ and a flexible support belt; the external thread connection The ring Ⅰ is screwed and connected with the internal thread Ⅰ of the pot body shell, and the external thread connection ring Ⅱ is screwed and connected with the internal thread Ⅱ of the spout shell; The position ring is used to constrain and fix the inner pot in the pot body shell; the handle and handle are arranged under the stepped threaded fixing ring of the pot body shell, and the bottle mouth of the inner pot matches the bottle stopper. The invention has the characteristics of convenient disassembly, explosion-proof and fall-off prevention, convenient replacement of a new pot liner at any time, and reusable pot body shell.

The invention belongs to the field of pipe limiting, and discloses a pipe rotation limiting device. The pipe rotation limiting device is mainly composed of a baffle (1), a concave arc insert (2), a convex arc insert (3) and a T-type beam (4), wherein the concave arc insert (2) is clamped into the baffle (1) through adoption of an expansion connection technology, the convex arc insert is clamped into the T-type beam (4) through the adoption of the expansion connection technology, one end of the T-type beam (4) is fastened with a pipe (6) through a clamping hoop (5), the convex arc insert (3) at the other end of the T-type beam (4) is placed in an arc chute formed in the concave arc insert (2), a convex arc face of the convex arc insert (3) and a concave arc face of the concave arc insert (2) are both concentric cylinder faces with the pipe center as the circle centers, and the convex arc face is matched with the concave arc face. The pipe rotation limiting device is a device which directly limits the pipe rotation without limiting the pipe translational motion.

The invention discloses a position-adjustable mobile phone supporting frame for a mountain bike. The position-adjustable mobile phone supporting frame for the mountain bike comprises a fixture, a connecting seat, an article placing platform, a limiting rod, a limiting tooth, a clamping plate and sliding grooves; the fixture is connected with the article placing platform through the connecting seat; the connecting seat can slide on the upper surface of the fixture; n-shaped press plate capable of rotating are also symmetrically distributed on the two sides of the article placing platform; a front limiting plate and a rear limiting plate are also arranged on the upper surface of the article placing platform in parallel; one end of the limiting rod is connected to the bottom of the connectingseat; a sliding rod is vertically connected to the bottom of the rear limiting plate; the sliding rod can slide within the sliding groove on the article placing platform under the rear limiting plate; the plurality of clamping grooves are also uniformly formed in the two sides of the sliding groove; and the two ends of the clamping plate can be clamped in the corresponding clamping grooves formedin the two sides of the sliding groove. According to the position-adjustable mobile phone supporting frame for the mountain bike, through adoption of the structure, the distance between the front limiting plate and the rear limiting plate can be adjusted according to different mobile phone models to realize firm fixing of different signal mobile phones; and therefore, the use is simple and convenient.

The invention discloses an Internet based engineering service system. In the system, expert services are connected with demands in a social service manner, and an engineering scheme is compiled, reviewed and optimized. The service system comprises a user module, supply and demand connection module, a scheme optimization module and a transaction module, identity information of users is logged in via the user module; via the supply and demand connection module, a demand party publishes a project in the system according to self demand, and a supply party selects a proper project for bidding and submitting an optimized scheme; via the scheme optimization module, an expert becomes a core expert after passing a promotion condition of the system, core experts form a judge group, the judge group checks and select the schemes by different supply parties of the same project, a final optimized scheme is formed and submitted to the system, and the system notifies a result to the supply parties participates in bidding and the demand party; and via the transaction module, the system distributes a service fee to the selected experts according to the ratio in the final optimized scheme. The demandparty can also publish demand for management improvement of an enterprise and project, and the core experts help solving the problems in enterprise management.

The invention belongs to the field of corrosion fatigue crack detection discloses a corrosion fatigue crack detection system and a use method thereof. A new crack detection method is provided by improving a loading system structure and a corrosion liquid treatment system from the perspective of methods of the loading system structure, the corrosion liquid treatment system structure and a crack detection system. A guide rail sliding block mechanism is connected with a supporting roller, so that rapid position adjustment of the supporting roller is achieved, the supporting roller is convenient to install, and the system is wide in measurement range and high in elasticity. According to the dynamic crack detection system, according to the position monitoring system, a scale and an industrial camera are adapted to perform image acquisition on a crack propagation process; a crack tip image is converted into coordinates after being subjected to image processing; and finally the coordinates are converted into a crack propagation length after being subjected to computer processing; and therefore, the reduction of detection precision caused by other factors is avoided, and non-contact measurement of the crack propagation length is realized.

The invention discloses a flame restriction strengthening device and method based on magnetic confinement and application. The flame restriction strengthening device comprises a first guide rail and asecond guide rail. The first guide rail and the second guide rail are oppositely arranged. The adjustment of the vertical separation distance between a first annular permanent magnet and a second annular permanent magnet is achieved by the movement of the first annular permanent magnet and / or the second annular permanent magnet. According to the arrangement mode of the magnetic poles, the N polesand the S poles are arranged from top to bottom, or the S poles and the N poles are arranged from top to bottom. The first annular permanent magnet is located in the region arranged below the vertexof a flame formed in an outlet of a nozzle, and the second annular permanent magnet is located in the region arranged above the outlet of the nozzle. The flame restriction strengthening device furthercomprises a first conductor. The first conductor is located above the nozzle and connected with a positive electrode. The central axis of the nozzle penetrates through the annular region of the firstannular permanent magnet, the annular region of the second annular permanent magnet and the region defined by the first conductor, and is crossed with the first conductor. The flame restriction strengthening device and method based on magnetic confinement achieve the simple and effective strengthened restriction conducted by the magnetic field and the electric field on the high-temperature combustion flame.

The invention relates to a wall connecting device used for an industrial factory building outer wall scaffold and a use method thereof, and belongs to the field of building construction. The device comprises a pre-embedding part and a connecting part, the pre-embedding part comprises a pre-embedding part and a pre-embedding casing pipe, the end, close to the outside of a wall, of the pre-embeddingrod is provided with an outer thread, an inner thread is formed on the inner wall of the pre-embedding casing pipe, the inner wall of the pre-embedding casing pipe sleeves the pre-embedding rod in athreaded manner, the connecting part comprises a connecting pipe, one end of the connecting pipe is provided with a connecting plate, the connecting plate is provided with a positioning bolt, the positioning bolt penetrates through the connecting plate to be inserted into the pre-embedding casing pipe, the end, away from the connecting plate, of the connecting pipe is fixedly provided with a connecting block, a through hole is formed in the connecting block, a fastening assembly is mounted in the through hole, the fastening assembly comprises a fastening pipe, one end of the fastening pipe isprovided with a right-angle fastening part, an inserting rod is fixed to the fastening pipe, and is mounted in the connecting block in a penetrating manner, and a positioning part enabling the inserting rod and the connecting block to be oppositely fixed is arranged on the inserting rod. The wall connecting device has the advantages of conveniently improving the alignment effect of the wall connecting device and a scaffold so as to improve the connecting stability.

The invention discloses an internet-based engineering scheme service system, adopts a socialized service method to connect expert service and the demand, and constructs a service system for engineering scheme compiling and evaluating and evaluation optimization. The system comprises a user module for inputting and identifying identity information of a user; a supply and demand docking module through which demand sides issue their own projects in the system according to their own demand, and supply sides select appropriate projects to bid and submit optimization schemes; an optimization schememodule, wherein experts become core experts after meeting promotion conditions of the system, and the core experts constitute an evaluation committee, the evaluation committee checks and preferably selects schemes of different supply sides on the same project, forms a final optimization scheme and submits the scheme to the system, and the system informs the supply sides participating in bidding and the demand sides of a result; and a transaction module, wherein the system allocates service fees to selected experts according to the proportions in the final optimization scheme. Barrier-free communication between the demand sides and the supply sides is realized by virtue of the system.