109results about How to "Solve the shock" patented technology

The invention provides an efficient shock-absorption support for a new-energy cooling water pump. The efficient shock-absorption support for the new-energy cooling water pump comprises an upper supporting plate and a lower supporting plate. The lower supporting plate is located below the upper supporting plate. Shock absorption devices are arranged at the four corners of the upper end of the lowersupporting plate. Each shock absorption device comprises an upper sleeve and a lower sleeve, wherein the upper sleeve is located in the lower sleeve and slidably connected with the lower sleeve, thebottom end of the interior of the lower sleeve is fixedly connected with a telescopic connecting rod, and the top end of the telescopic connecting rod is located at and fixedly connected with the topend of the interior of the upper sleeve. According to the efficient shock-absorption support for the new-energy cooling water pump, shock absorption of the cooling pump is achieved through the shock absorption device, so that the stability of the shock absorption support is improved, and accordingly, the shock-absorption support is safer and more reliable; and the shock absorption devices and an air bag are combined for shock absorption, so that impact force borne by the shock-absorption support is buffered and released, the problem of shaking of the shock-absorption support is effectively solved, and the shock absorption effect of the shock-absorption support is further improved; and noise generated when the cooling water pump operates is effectively lowered through sound absorption cotton, and thus the efficient shock-absorption support can be normally used by people without being affected.

The invention discloses a network failure processing method and device. A distributed storage system comprises a service network and a storage network which are deployed separately, a monitor (MON) and multiple object storage devices (OSD) are connected to the service network to achieve communication, and the OSDs are further connected to the storage network to achieve communication. The method isapplied to the OSDs and comprises the steps that a storage network connection link between one OSD and the OSD matched with the OSD is detected to obtain link state information of the OSD side; and if it is detected that the link state of the OSD side is abnormal, the daemon process of the OSD is terminated actively, and the OSD is prevented from sending failure information of the OSD matched with the OSD to the MON through the service network. The network failure processing method is applied to the OSDs in the storage system, when one OSD detects that the link state of the OSD side is abnormal, the OSD terminates the daemon process of the OSD and is prevented from falsely reporting failures of the other OSDs, and therefore the OSD shock problem in the storage network is solved.

The invention discloses equipment for testing high-speed tensile stress and strain of a material. The equipment comprises a test sample, a high-speed tensile testing machine, a strain gauge, a light source, a high-speed camera and a controller, wherein the test sample is shaped like a dumbbell, the middle part thereof is a parallel section, the lower part thereof is an elastic section, and the parallel section is sprayed with speckles; the high-speed tensile testing machine is used for stretching the test sample; the strain gauge is stuck on the elastic section of the test sample; a strain meter is used for receiving data transmitted from the strain gauge; the light source is used for aligning a test part of the test sample so as to make the speckles sprayed on the surface of the test sample clearly visible; the high-speed camera is used for aligning the parallel section of the test sample; the controller is used for receiving data transmitted from the high-speed tensile testing machine, the high-speed camera and the strain meter, and drawing a stress-strain curve of the test sample. The invention further provides a method for testing the high-speed tensile stress and strain of thematerial. Through the equipment and the method, the problem of oscillation of the stress-strain curve of the material under a high strain rate can be effectively solved, so that a test result becomesaccurate.

The invention provides a hard disc device, comprising a magnetic head and a disc body, wherein the magnetic head and the disc body are provided with low-friction atomic scale smooth surfaces; and each low-friction atomic scale smooth surface comprises monolayer graphene, molybdenium disulfide, bismuth, molybdenum, mica and the like. Vander wale force between the low-friction atomic scale smooth surfaces is used as soft support, thus greatly reducing the distance of the magnetic head and the disc body, correspondingly improving the storage density of a magnetic disc, and being capable of realizing contact reading and writing to a hard disc. Simultaneously, due to the extreme low friction coefficient between the atomic scale smooth surfaces, the extreme high rotating speed can be easily realized, so the reading and writing speed of data of the hard disc can be improved. In addition, the hard disc device can well solve the defects of the traditional hard disc in the aspects of high-low temperature resistance, vibration resistance, shock resistance and the like, and greatly improves the stability of the hard disc.

The invention belongs to the technical field of Internet of Things and big data and relates to a non-intruding type on-line and real-time electric power load identification method and identification system that can help solve technical problems such as unreasonable conventional design and the like. The method comprises the following steps: A real time electric power signals are obtained; B non-intruding type load identifying and analyzing operation is conducted; C, results are fed back. The system comprises at least one embedded device terminal connected onto a resident side electricity distribution box, the embedded device terminal is connected with a cloud terminal, the cloud terminal is connected with a background server, and the background server is connected with a data storage device and is capable of transmitting analysis results to the terminal device corresponding to the resident side electricity distribution box. The non-intruding type on-line and real-time electric power load identification method and identification system are advantageous in that resident side users can enjoy low cost, training can be performed without a number of labeled samples, the identification system is sensitive to small load electric appliances, electric energy oscillation problems can be solved, accuracy of load identification can be ensured, an overall energy solution can be provided for a household, and on-line and real-time effects are allowed via algorithm efficiency.

The invention provides a method and apparatus for suppressing neighbor oscillation. The method comprises the following steps: a first router obtains a neighbor state change dynamic state between a second router which establishes a neighbor relationship with the first router; the first router adds one to a neighbor penalty value when the neighbor state change dynamic state is changed from a normal state to a fault state each time; when the increased neighbor penalty value is greater than a preset suppression threshold value, the first router sets the neighbor relationship as a suppression state. The method and apparatus solve a problem that an unstable neighbor state causes routing oscillation of a local routing table in the prior art so as to achieve an effect of saving valuable bandwidth resources and CPU resources.

The invention discloses a virtual synchronous generator-based rotational inertia optimization control method, and belongs to the control field of distributed power generation. When frequency offset exceeds an allowable range, the rotational inertia is adjusted to slow down frequency change; and when the frequency change rate is in a zero passage reversion state, the rotational inertia is adjustedto realize frequency recovery. By virtue of the method, a microgrid inverter adopts a control strategy of the virtual synchronous generator, so that an optimization algorithm of the rotational inertiaof the virtual synchronous generator is realized; meanwhile, by improvement of a speed adjustment link, a voltage current phase angle is obtained by adopting a control mode to calculate the phase angle; and by adoption of the method, the inertia advantage of the conventional synchronous generator can be embodied completely, the inherit dynamic performance and stability of the inverter can be taken into consideration, and the economical efficiency of the power grid operation can be improved.

The invention provides a multi-path routing method based on reinforcement learning and transfer learning, which is used for solving the technical problem of poor equivalent path load balance in a network environment with less flow data in the prior art, and comprises the following implementation steps of: constructing a real network Z and an experimental network G consistent with a Z topological structure; establishing a two-dimensional array H; constructing a multi-path routing model based on reinforcement learning; initializing a flow matrix DM and an equivalent path flow proportion matrix PM; performing iterative training on the multi-path routing model based on reinforcement learning in the experimental network G; migrating global neural network weight parameters in a routing decisionmodel obtained by training in an experimental network G to a real network Z based on a transfer learning method; and carrying out adaptive training on the global neural network initialized in the realnetwork Z to obtain a multi-path routing result conforming to the real network environment characteristics. The method can be used for data center networks and other scenes.

The invention relates to a combined curtain wall which is characterized by comprising an aluminum single veneer curtain wall, a heat-insulated transparent frame glass curtain wall, a stone curtain wall, a steel plate structure and aluminum alloy doors and windows. The aluminum single veneer curtain wall is positioned at the aluminum plate part between a porch and the windows and a large area of shearing wall parts; the stone curtain wall is positioned on a solid wall on the lower part; and the rest part of the combined curtain wall is the heat-insulated transparent frame glass curtain wall. The combined curtain wall can effectively prevent the electric erosion and the earthquake while strengthening the viewing effect, reduce the precision requirement of the construction and better achieve the effects of heat preservation and insulation.

The invention provides a load balance CTP (Collection Tree Protocol) routing protocol based on data transmission applicable to wireless sensor networks. The protocol compromises between the energy consumption of nodes in a wireless sensor network, and the high efficiency and reliability of data transmission, as well as the balance of node energy consumption of nodes on the same level of a routing tree of a topological structure in the wireless sensor network. Through considering data amount forwarded to a candidate father node when a father node is selected as the node in the wireless sensor network, forwarded data of nodes on the same level of the topological structure tree in the wireless sensor network is balanced; therefore, while the overall performance optimization of the network ensured, the survival time of the network is effectively prolonged, the energy efficiency of the network is improved, the problem of network oscillation of the wireless sensor network is solved, and the performance of high data delivery rate and high data transmission efficiency of the CTP routing protocol is maintained.

The invention discloses a time change method for dynamic data reconstruction of anomalous diffusion problems. According to the method, fractal derivative and fractional derivative models have the characteristics of spatial and temporal scale changes, so that dynamic data of anomalous diffusion is reconstructed on the basis of intrinsic time change; a characteristic time of a diffusion process is used as a time term scale to respond the interior movement of the diffusion process in a diffusion format, so that the reliability of a calculation result is improved, the calculation error is reduced, the stability of the calculation result is improved, the calculation efficiency is improved, a calculated amount and a memory space do not need to be added, the calculation is simple, rapid and easy to implement, the problem of result oscillation in the initial stage can be effectively solved, an accurate stable numerical value result can be obtained, solute arrival times and speeds in a relocation diffusion process of solutes can be reflected more really, and reliable guidance can be provided for engineering application; and the method can be used for simulating the processes of migration, in soil, of pollutants, petroleum seepage, underground water transportation, and relocation diffusion of moisture such as turbulent flows and the solutes, provide scientific instructions for scientifically preventing and treating environment pollution, and has important theoretical and engineering meanings.

The invention relates to blast furnace taphole filled aluminum stemming and a preparation method thereof and belongs to the field of high-temperature metallurgical fireproof materials. The preparation method comprises the following steps of: premixing 40 to 50 mass percent of corundum, 12 to 30 mass percent of silicon carbide, 3 to 5 mass percent of micropowder, 8 to 12 mass percent of ball clay,1 to 3 mass percent of plasticizer, 2 to 4 mass percent of graphite, 3 to 5 mass percent of expanding agent aluminium silicate, 3 to 5 mass percent of metal powder, 3 to 5 mass percent of titanium corundum and 3 to 5 mass percent of modified asphalt powder for later use; adding the mixture into a wheel roller, and pre-rolling for 5 minutes; adding 15 to 20 mass percent of modified liquid tar; performing high-speed wheel rolling for 30 to 35 minutes, so that the Marshall value is 4 to 16 MPa; and measuring the Marshall value again after 3 days, wherein if the Marshall value is 8 to 24 MPa, theproduct is qualified. By the blast furnace taphole filled aluminum stemming and the preparation method thereof, problems of low high-temperature strength, low high-temperature toughness and environmental pollution of the stemming are solved; and problems of shallow iron notch, broken iron notch and spattering are solved at the same time.

The invention discloses a control method for a hysteresis nonlinear robot system, and belongs to the field of robot system control. A hysteresis nonlinear robot with P-I (Prandtl-Ishlinskii) is selected as a research object to measure system parameters of the robot and joint position information and joint velocity information of the robot, a performance function is introduced to convert a constraint tracking control problem of an original robot to an unconstrained stabilization problem, and unknown parameters in the hysteresis nonlinearity are regulated by employing adaptive control to designan adaptive predetermined performance backstepping control strategy. The control method for the hysteresis nonlinear robot system optimizes the transient performance of the system, improves the convergence rate, ensures the steady state performance of the system, and improves the control precision; and moreover, the adaptive parameter regulation law is employed to estimate the unknown parameters in the hysteresis nonlinearity so as to effectively solve the problems of the system oscillating and system instability caused by hysteresis nonlinearity and improve the working performances of the system.

The invention discloses a multi-phase staggered parallel DC-DC converter device. The multi-phase staggered parallel DC-DC converter device comprises a multi-phase staggered parallel converter main circuit and a control circuit which are connected with each other, wherein the control circuit comprises a voltage controller, a plurality of full-load range regulators, a plurality of current sharing controllers and a PWM modulation circuit, the plurality of full-load range regulators are arranged in parallel, the plurality of current sharing controllers are arranged in parallel, an output end of the voltage controller is connected with input ends of the full-load range regulators, output ends of the full-load range regulators are connected with input ends of current sharing controllers, and thecurrent sharing controllers are connected with each branch in the multi-phase staggered parallel converter main circuit by the PWM modulation circuit. By the device, the application range of the multi-phase staggered parallel DC-DC converter is expanded, and the device is still applicable to conditions which each phase device parameter is different; and within a full-load range, stable running ofthe converter in an inductance current continuous mode is achieved, and the problems of oscillation and instability of the converter caused by switching between the continuous mode and an interruptedmode are solved.

The invention provides a method and device for controlling pan-tilt tracking camera shooting, and the method comprises the steps: calculating the speed v and the speed v1 of a previous frame accordingto the positions of a tracking target in a current frame of picture and the previous frame of picture, and determining the acceleration delta(v) through the speed v and the speed v1; determining a distance difference value x with the center of the picture; determining the maximum detection distance Smax of the distance tracking target; determining whether the tracking target and the pan-tilt movein the same direction or not according to the positive and negative values of delta(v)*delta(x), and adjusting the Smax by using delta(x) in combination with the positive and negative values of v; and determining the maximum acceleration Amax of the cradle head according to the adjusted Smax, and controlling the cradle head to rotate by utilizing the final issuing speed v2 of which the differencevalue with the speed v1 is not greater than the Amax. According to the invention, the problems of overshoot and oscillation generated when a traditional algorithm is used for carrying out pan-tilt tracking motion control are solved; the success rate of tracking the tracking target is improved by combining the characteristics of the detection algorithm.

The invention discloses a clock reporting method and device. The method comprises the following steps: upstream equipment transmits a notification message to downstream equipment when undergoing main-standby switching occurs; and the downstream equipment receives the notification message and keeps locking a current clock source. Through adoption of the technical scheme disclosed by the invention, the problem of network oscillation caused because the upstream equipment undergoes the main-standby switching in the prior art is solved so that the effect of maintaining frequency synchronization stability in a network is realized.

The invention relates to a three-dimensional electromagnetic slow diffusion numerical simulation method based on super-convergence interpolation approximation. The method comprises: after a complex conductivity model is introduced into a frequency domain Maxwell equation set, an electromagnetic field diffusion equation containing a negative fractional power term of a complex frequency variable, and performing frequency-time conversion to obtain a time domain control equation containing a Caputo fractional order differential term; performing super-convergence approximation on a Caputo fractional derivative in the electric field control equation by adopting an Alikhanov super-convergence interpolation approximation method to obtain a non-uniform step size discrete approximate expression of afractional order differential item, thereby finishing stable and high-precision direct solution of the time domain fractional order differential item; and finally, discretizing the control equation based on a finite difference algorithm, deriving an electric field and magnetic field iterative equation, and finally realizing high-precision numerical simulation of three-dimensional time domain electromagnetic slow diffusion. The invention aims to solve the problems of weak singular instability and large error of fractional differential solution and realize high-precision numerical simulation ofthree-dimensional time domain electromagnetic slow diffusion.

The invention discloses a conveying belt structurally comprising a conveying device, side baffles plate and foot stands. The conveying device comprises conveying belt bodies and rolling shafts; the conveying belt bodies are connected to the rolling shafts in a sleeving mode and make close contact with the rolling shafts; the side baffles are fixedly installed on the two edges of the conveying belt; the two ends of the outer side of each side baffle are both connected with the foot stands correspondingly; the side baffles and the foot stands are fixedly connected through bolts; the foot stands comprise bases and connecting rods; the connecting rods and the bases are movably connected through butterfly-shaped screws; the bases comprise upper bottom plates and lower bottom plates, and rubber mats are installed between the upper bottom plates and the lower bottom plates; anti-slip strips and positioning grooves are uniformly distributed on the surfaces of the conveying belt bodies, the anti-slip strips and the positioning grooves are distributed alternately; and the connecting rods are provided with inserting holes in a sectioned mode. The conveying belt is complete in function and convenient to use.

The invention discloses a double-fuzzy control system and method of tailstock drone longitudinal posture, and relates to the technical field of drone posture control system and method. The system comprises two fuzzy controllers, the fuzzy controller I adopts variable universe fractal thought design, an error e and an error change de serve as inputs of the fuzzy controllers, parameters delta Kp, delta Ki and delta Kd of a PID controller are as outputs, the error change d e and a uniformization error accelerated speed parameter rv are as fractal factors, dynamic response performance of a systemcan be improved, and the problem of pitch attitude loop response slow speed is solved; the fuzzy controller II takes flight speed and system error as input, takes a domain of discourse C as output, uses the output to adjust the output domain of discourse range of the domain of discourse fractal fuzzy controller I in time, so that the parameters of the PID controller not only change with the changeof the system error, but also solve the problem of vibration due to the fact that the pitch attitude loop is affected by the flight speed.

The invention relates to siliceous stemming for filling a blast furnace taphole and a preparation method thereof, and belongs to the field of high-temperature metallurgical fireproof materials. The method comprises the following steps of: pre-mixing 35 to 45 mass percent of diaspore silicate, 16 to 27 mass percent of silicon carbide, 3 to 5 mass percent of micro powder, 10 to 18 mass percent of ball clay, 2 to 4 mass percent of graphite, 1 to 3 mass percent of plasticizer, 6 to 10 mass percent of ferrosilicon nitride, 2 to 4 mass percent of metal powder, 3 to 5 mass percent of modified asphalt powder and 3 to 5 mass percent of expanding agent aluminum silicate fine powder for later use, putting into a wheel roller and pre-rolling for 5 minutes; adding 15 to 20 mass percent of modified liquid tar, performing wheel rolling at a high speed for 30 to 35 minutes to ensure that a Marshall value is between 4 and 16MPa; and packaging, and measuring the Marshall value 3 days later, wherein the product is qualified when the Marshall value is between 8 and 24MPa. The problems of low high-temperature strength and high-temperature toughness of the stemming are solved, and the problems of a shallow iron notch, a broken iron notch and splashing are solved simultaneously.

The invention discloses an input current waveform optimization topological structure of an active third harmonic injection matrix converter. The input current waveform optimization topological structure comprises a three-phase alternating current power supply, an input filler, a voltage selector IVS, a bus filter, a third harmonic injection circuit, a current type inverter CSI, a three-phase alternating current load, and an output filter inductor; the voltage selector comprises a rectifying stage and three bidirectional switches; the rectifying stage comprises three bridge arms formed by an all-control type device; the third harmonic injection circuit comprises a y bridge arm formed by the all-control type device, and a harmonic injection current filter inductor Ly; and the topological structure has the bus filter on a bus. By virtue of the topological structure, input current sector switching distortion caused by switching of a high frequency bus current and a low frequency harmonic injection current of the active third harmonic injection matrix converter can be suppressed effectively, so that the input current waveform can be improved.

The invention discloses a power plant water and steam pipeline oxygenation control method for power plant, which mainly comprises the following steps of: dividing a pipeline water flow value into a plurality of sections, and setting a maximum opening degree value ai% for each water flow section; comparing detected pipeline water flow with all section values one by one, and determining the section where the pipeline water flow locates; calculating PID (Proportional Integral Derivative) control quantity according to a detected oxygen content signal in water and a control target value; and comparing a PID control signal with the maximum opening degree value ai% of oxygenation adjustment in the section. If the PID control signal is less than the maximum opening degree value ai% of the section, then the oxygenation adjustment opening degree equals to the PID control signal; if the PID control signal is not less than the maximum opening degree value ai% of the section, then the oxygenation adjustment opening degree equals to the maximum opening degree value ai%. Oxygenation adjustment becomes finer along with the increase of flow sections, and the technical problem that oxygen content of feed water or condensed water oscillates or deviates from the adjustment target value is solved.

A polyvinyl chloride (PVC) / acrylonitrile-butadiene-styrene copolymer (ABS) tube is composed of an external hard PVC layer, an internal ABS layer, and a thermofusible adhesive layer as sandwich layer. It is prepared by three layers coextruding out method, which includes such steps as extruding out PVC-U layer by primary extruder while extruding internal ABS layer and adhesive sandwich layer by two secondary extruders, passing than through a common shaping die, sizing, cooling, winding, and packing.

The invention belongs to the fields of new energy development and power system optimization, and relates to a dynamic maximum power point tracking technology based on power prediction. The dynamic maximum power point tracking technology based on the power prediction comprises the steps that output power of a photovoltaic cell is predicted by a power prediction method under the same voltage condition; and a perturbation step size of a perturbation and observation method is adjusted dynamically and in real time by a method that the step size changes along with a difference value between output power and a maximum power point of a photovoltaic power generation system. According to the dynamic maximum power point tracking technology based on the power prediction, the misjudgment problem existing in the perturbation and observation method can be solved, the oscillation problem of the perturbation and observation method at the maximum power point position is solved, and power generation efficiency and working stability of the photovoltaic cell are improved.

The invention discloses a hybrid power gear shifting control method, which comprises the following steps of: receiving a gear shifting instruction, controlling a clutch to be disengaged, and simultaneously controlling a front-end motor to linearly and additionally output a reverse torque in the direction opposite to the torque of an engine; controlling the clutch to be completely disengaged to enter a transmission torque disappearing stage; recombining the clutch, outputting the torque to an input shaft so that the input shaft rotating speed is the same as the engine rotating speed; controlling the clutch to be disengaged again, so that the clutch restores to enter a transmission torque disappearing stage; and finally, controlling the clutch and a synchronizer to be combined in an existingmode. The rotating speed of the engine is controlled through torque change of the front-end motor to replace existing torque limiting closed-loop control over the rotating speed of the engine, and the impact feeling generated when gear shifting starts or ends is avoided; by controlling the speed difference between the rotating speed of the input shaft and the rotating speed of the engine to be reduced, the synchronizer can be engaged smoothly, the service life of the synchronizer can be greatly prolonged, or the synchronizer with lower cost can be adopted.

The invention discloses a shock absorber for mining equipment mounting. The shock absorber comprises a shock absorbing barrel, a shock absorbing spring, a piston plate, a shock absorbing barrel cover,a piston rod and a base. The shock absorbing barrel cover is connected with the upper end of the shock absorbing barrel. A guiding sleeve is arranged in the middle of the shock absorbing barrel coverin a penetrating mode. The upper end of the guiding sleeve penetrates from the shock absorbing barrel cover and is in threaded connection with a locking nut. The piston rod is arranged in the middleof the guiding sleeve in a penetrating mode. A supporting block is welded to the top end of the piston rod. A connecting plate is fixed to the side face of the supporting block. The bottom end of thepiston rod penetrates through the piston plate and an upper spring base to be connected with the fixing block. The shock absorbing spring is connected with the lower portion of the upper spring base fixedly. By mounting the shock absorbing spring in a damping medium cavity and filling the damping medium cavity with viscous fluid, sliding of the piston plate is buffered, vibration from a connectingplate to the piston rod is buffered, the shock absorber has good shock absorbing effect and shock resistant effect, and the problems that shock resistance and shock absorption during mounting of mining equipment are difficult to achieve are effectively solved through the shock absorber.

An embodiment of the invention provides a method and a device for eliminating media access control withdrawal message concussion in VPLS (virtual private LAN service). A media access control withdrawal message sent by a router includes router identification TLV (type-length-value) information, and when the router include router identification TLV information includes an identification of the local router, the media access control withdrawal message is abandoned. The method and the device for eliminating media access control withdrawal message concussion in VPLS solves the problem of media access control withdrawal message concussion in a VPLS network, so that system loss of the router is reduced and performances of a whole H-VPLS (hierarchy of VPLS) nuclear network can be improved.

The invention relates to a hierarchical PI transition control method and system based on Boost circuit DCM / CCM mode switching. The method comprises the steps of carrying out PI hierarchical division according to the output voltage of a Boost circuit and PI parameters, and enabling the PI hierarchical division to comprise a seal pulse PI region, a steady-state PI region and a hierarchical PI region; further dividing the hierarchical PI region into n PI grades, wherein the n PI grades comprise a first hierarchical PI region to an nth hierarchical PI region; arranging hysteretic transition regions between the steady-state PI region and the first hierarchical PI region and between two adjacent PI regions in the hierarchical PI region; when the Boost circuit is switched from the DCM mode to theCCM mode or from the DCM mode to the CCM mode, determining the PI region to which the output voltage Uo _ i of the Boost circuit belongs at the current moment ti, and adjusting the current PI valuesof a voltage loop and a current loop to be the PI value of the PI region to which the output voltage Uo _ i of the Boost circuit belongs at the current moment. According to the method, a PI multistageswitching mode and a hysteresis control method are utilized; the oscillation problem of the system and smooth transition of output voltage when PI parameters change in a large range are solved; and continuous work of two working modes is achieved.

The present invention relates to a dual-motor moment synchronous control system used for a hard-brittle material multi-wire cutting machine. The dual-motor moment synchronous control system used for the hard-brittle material multi-wire cutting machine comprises a motion controller, the motion controller controls a plurality of servo drivers and a plurality of motors via buses, and the plurality of motors comprise two spindle motors. The two spindle motors adopt a moment mode to control, the motion controller real-timely obtains the moment control data via an on-site bus and controls the two spindle motors according to the obtained moment control data. The dual-motor moment synchronous control system used for the hard-brittle material multi-wire cutting machine of the present invention enables the synchronism of the dual motors to be improved, solves the synchronous time delay and oscillation problems of the two spindle motors, at the same time, saves the transmission belts, and enables the system noise to be reduced.

The invention discloses a hollow load bearing wall, which is arranged between two concrete columns, and comprises a main wall body and decorative walls adhered to the concrete columns, wherein the main wall body is formed by stacking a plurality of layers of bricks layer by layer; bricks on adjacent upper and lower layers are arranged in a staggered mode; each decorative wall comprises a single-face panel brick and an angle panel brick with a right angle; each brick comprise a first strip side and a second strip side which are arranged at an interval with a certain distance, and a ribbed bar for connecting the first strip side and the second strip side; and each single-face panel brick comprises a single-face panel body. According to the hollow load bearing wall, the butt joint of bricks on the same layer is very convenient, a wall body can be built quickly and accurately without needing other stay wires or other methods, horizontal self alignment between bricks on the same layer is realized, vertical self alignment between an upper layer and a lower layer is realized, and the built wall body is firmer and has good shock resistance; and vent holes of the bricks on the adjacent upper and lower layers are communicated, so that the main wall body is provided with a ventilation and heat-insulation hollow layer, and ventilation, heat preservation and heat insulation are realized.