229results about How to "Avoid cycle" patented technology

The invention discloses a bridge plug with a large drift diameter. The bridge plug comprises an upper joint, a central tube, a guiding shoe head and a bridge plug assembly; the upper joint is an annular part and is fixedly connected with the outer side of one end of the central tube in a sleeving mode; the central tube is a metal central tube, a soluble ball base is arranged at the end, close to the upper joint, of the central tube, and the central tube is a drillable metal part; the guiding shoe head is an annular part, is fixedly connected with the outer side of the other end of the central tube in a sleeving mode and is provided with a device used for being fixedly connected with a pull rod which is arranged in the bridge plug in a sleeved mode; the middle section of the central tube is sleeved with the bridge plug assembly which is located between the upper joint and the guiding shoe head. The invention further discloses a setting method of the bridge plug with the large drift diameter. The drilling polishing procedure of the bridge plug with the large drift diameter can be omitted, the problems of a long construction period, high operation cost and high construction risk brought by drilling polishing are solved, and the bridge plug is easier and more convenient to use and faster to construct.

The invention relates to an implementation method and a system for NGINX server load balancing, and belongs to the field of computer network communications. The implementation method provided by the invention comprises the following steps: adopting a triggering mechanism to dynamically update resource information of a backend server cluster via an NGINX server, then calculating a load value of a backend server under each service type according to the resource information of the backend server cluster and different service types, and processing an HTTP request by selecting a backend server of which the load value is the smallest in the service type to which the HTTP request belongs. The invention further provides a corresponding system for NGINX server load balancing. According to the implementation method and the system, requests of a user can be distributed reasonably to ensure that the load of the back-end server cluster is in a relatively balanced state. Therefore, the purpose of reasonable use of the server resource is achieved.

The invention provides a wireless electric energy transmission system compensation topological structure, relates to the wireless electric energy transmission system compensation topological structure, and aims at solving the problems that the existing wireless electric energy transmission system compensation topological structure is high in the number of compensation devices, high in system cost and low in power density. The S/CLC compensation topology comprises a primary series compensation capacitor, a loosely coupled transformer, a secondary parallel compensation capacitor, a secondary series compensation inductor and a phase shifting capacitor. The primary series compensation capacitor is connected with a full-bridge inverter. The primary series compensation capacitor is connected with the primary self-inductor of the loosely coupled transformer. The primary self-inductor of the loosely coupled transformer is connected with the full-bridge inverter. The secondary self-inductor of the loosely coupled transformer is connected with the secondary parallel compensation capacitor and the secondary series compensation inductor. The secondary self-inductor of the loosely coupled transformer is connected with the secondary parallel compensation capacitor, the phase shifting capacitor and a full-wave rectifier. The secondary series compensation inductor is connected with the phase shifting capacitor and the full-wave rectifier. The wireless electric energy transmission system compensation topological structure is used for wireless electric energy transmission.

The invention discloses a method and a system for implementing configuration on the basis of network services. The method and the system have the advantages that network service configuration databases are created for users, topological structures, identification of service flows, identification of network devices for carrying the service flows and configuration information of physical ports, VLAN (virtual local area network) selection and the like can be selected from the databases for network topological contents and specific service contents on the basis of network service requirements, accordingly, service types, source MAC (media access control) addresses and target MAC addresses can be identified according to ports for the network devices for carrying the service flows, network topology can be creased on the basis of the identification of the service flows and the configuration information of the ports in the network service configuration databases, the same services can be transmitted in selected VLANs, and the configuration can be implemented; the configuration information can be issued to the various network devices, so that the complexity and the troublesome degree of the network configuration can be lowered, the specific services can be transmitted among the configured networks in an identifiable manner, and network configuration lists are high in reliability.

The invention discloses an online detection method for scrap iron content in pivoting support lubricating grease and a lubricating grease online detection device. Automatic sampling of solid lubricating grease is achieved by using a lubricating grease online detection device in the online detection method. The scrap iron content in the lubricating grease is determined by using an inductance value change of a detection coil caused by scrap iron mill grains in the lubricating grease, so as to effectively judge the abrasion degree inside a pivoting support raceway; a real-time detection value is compared with a preset pre-warning value to judge whether the lubricating grease loses efficacy, so as to provide reference for optimization of the lubricating condition of the raceway. By adopting the online detection method, the online sampling difficulty due to the fact that the solid lubricating grease cannot flow is radically solved, online detection is achieved, the problems of long analysis period, complicated detection process and the like in off-line detection are avoided, and the online detection method has important significance on evaluation of the pivoting support operation state, improvement of the lubricating condition, effective prolonging of the service life of the pivoting support, and improvement of the operation reliability. The method is simple, easy to achieve, and high in automatic degree.

The invention relates to the technical field of organic fertilizer production, in particular to efficient bio-organic fertilizer and a preparing method thereof. The preparing method includes the steps that the aerobic fermentation technology is used, cassava alcohol biogas residues are mechanically dehydrated, auxiliary materials are added, aerobic microbial floras are inoculated, drying, smashing and pelleting are carried out, and composite functional bacteria are added; the organic fertilizer obtained after fermentation is prepared from, 40-60% of organic matter and 6-7% of total nutrients in units of the dry basis, and the effective viable count is 0.5-200000000/g. The problems that an existing organic fertilizer production technology is long in fermentation period, a fermented product is low in fertilizer efficiency, secondary pollution is caused to the environment, long-term fertilizer application leads to soil hardening, and large-scale application is limited are solved. The obtained organic fertilizer meets the organic fertilizer detection standard of the department of agriculture, is high in fertilizer efficiency, short in fermentation period and particularly suitable for industrial large-scale production and avoids secondary pollution to the environment.

The invention provides a 3D printer which comprises a circular tray, a tray base, a first driving device and a driving device, wherein the tray base is arranged on a 3D printer frame and used for supporting the circular tray; the first driving device is arranged on the tray base, connected with the circular tray and used for driving the circular tray to rotate by taking the center of a circle of the tray as a rotating center; and the second driving device is arranged on the 3D printer frame, connected with the tray base and used for driving the tray base to do rectilinear motion in the horizontal direction so as to enable the tray base to drive the circular tray to do rectilinear motion in the horizontal direction. According to the scheme provided by the invention, the motion mode of the tray is more flexible and diverse; the circular tray which is flexible and diverse in motion mode enables the 3D printer to draw a circle on the basis of a linear mode, so that the problems of high 3D model building difficulty and long printing cycle caused by circle drawing based on an integral mode are solved; and finally, the printing property of the 3D printer is improved by adopting the technical scheme provided by the invention.

The invention relates to a polyclonal antibody against an outer membrane protein of Candidatus liberobacter asiaticum, and a preparation method and application thereof. The polyclonal antibody is characterized by being prepared through injecting target proteins acquired by prokaryotic expression and used as an immunogen into a rabbit, and can effectively detect Candidatus liberobacter asiaticum existing in citrus by separately and specifically combining with the N terminal and C terminal of the outer membrane protein of Candidatus liberobacter asiaticum. According to the invention, plenty of high-purity target proteins are acquired by carrying out prokaryotic expression on the outer membrane protein genes of Candidatus liberobacter asiaticum, and the target proteins are used as the immunogen and injected into the rabbit, thus preparing and purifying the polyclonal antibody against the outer membrane protein. The titer assay and enzyme-linked immune experiments show that the prepared antibody has high titer and high specificity, and can be used for detecting field samples infected by Candidatus liberobacter asiaticum, thus laying a good foundation for the further development of colloidal gold immunochromatography assay test strips used for the field rapid detection of Candidatus liberobacter asiaticum.

The invention provides a message processing method and device based on a micro-service architecture. The method can comprise the following steps: after acquiring a to-be-processed message by a Micro-BRAS (Broadband Remote Access Server) container, determining a service type corresponding to the message, and determining a service processing container corresponding to the service type; and sending the message to the service processing container by the Micro-BRAS container, and performing processing corresponding to the service type on the message by the service processing container. According tothe technical scheme of the invention, a BRAS is divided into the Mirco-BRAS container and the service processing container by using a container virtualization technology, and the container is expanded or shrank. When a large number of user equipment is accessed, the container can be expanded to meet the service needs, and when the number of the accessed user equipment is reduced, the container can be shrank, thereby saving storage and computing resources, and improving the resource utilization.

The invention relates to a support method for an underground goaf roof of a coal mine, and belongs to the technical field of mining techniques and environmental protection. The method comprises the following steps: getting the initial caving interval of an immediate roof of an underground working face of the coal mine and the initial fracture length of a main roof, as well as the lithology and the thickness of each of the immediate roof and the main roof; adopting an anchor rod, an anchor beam and an anchor rope to synchronously support the immediate roof of a goaf during the process of forming the goaf according to the initial caving interval of the immediate roof; determining the type and length of each of the anchor beam, the anchor rope and the anchor rod for constituting a support structure, as well as the inter-row spacing among the anchor beam, the anchor rope and the anchor rod; adopting steel beam columns or preformed reinforced concrete beam columns to support the main roof through the immediate roof of the goaf within the range that the unsupported back span of the goaf is less than the initial fracture length of the main roof; determining the type, length and inter-row spacing of the steel beam columns or the preformed reinforced concrete beam columns; and operating till the completion of the propulsion work on the working face. The method has the characteristics of simple method, easiness in operation and capabilities of controlling the roof and avoiding caving.

The invention discloses a plate double-side three-point incremental forming device with a simultaneous forming and shaping function. The forming device comprises a rack, a plate placing structure, a lower tool head, upper duplex tool heads, an upper tool head moving mechanism and a lower tool head moving mechanism. The forming device comprise one lower tool head and a pair of upper duplex tool heads; although only three tool heads are provided, the relative positions of the two or three tool heads can be changed, so that the forming device can be utilized for forming complex parts; besides, the upper duplex tool heads has the function of simultaneous forming and shaping in one movement, so that the forming efficiency is high.

The invention relates to a distributed optical fiber deformation tensile instrument, and particularly relates to a deformation tensile device used for simulating practical applications of optical fibers at different tensile states. The distributed optical fiber deformation tensile instrument comprises a tensile system and an optical fiber bearing platform. The tensile system and the optical fiber bearing platform are connected. The defect that a conventional optical fiber deformation tensile test instrument cannot simply and accurately monitor the sensing performance of distributed optical fibers under multiple working conditions is overcome. The test device can simply and effectively control the loading progress, and can carry out crack opening development simulation, small strain monitoring and variable-angle variable-elevation multi-condition basic application research through a finally established movable smart tensile platform. The problems such as low optical fiber survival rate, long model making cycle, poor effect and high cost in some indoor simulation tests are avoided. The deformation mechanism and the combination mechanism of a distributed optical fiber monitoring technology under complex load conditions and at various operating state forms can be studied.

The invention discloses a new method for preparing polyparaphenyl bracing benedioxazole fiber, including the steps: (1) adding 4,6-diamido resorcinol-terephthalate, multipolyphosphoric acid and P2O5 in the ratio of 1 to 1.5-6 to 0.7-3 to a prepolymerization reaction kettle and making prepolymerization reaction in stages at 80-180 deg.C for 8-15 hr; (2) feeding the prepolymer obtained in step (1) into a double spiral extruder to continue reaction so as to obtain pulp with specific concentration logarithmic viscosity of 20-40 dl/g; (3) continuously extruding the pulp obtained in step (2) into spinning component and then adopting an art of first stretching-then solidifying, and then performing alkali washing, water washing, drying and coilding to make it. The advantages are short reaction cycle, high strength and modulus fiber, simple process and low pollution discharge

A lockable safety device for use with a firearm. The device comprises a clamp or bracket that is engageable with a locking bar. When the clamp and locking bar are engaged with a firearm, access to, and use of, the firearm is restricted. The clamp can comprise a third arm projecting therefrom to prevent complete cycling of the firearm action.

The invention discloses a water purifier, which comprises a water treatment unit, a Wifi communication module, a sensor and a controller, wherein the water treatment unit comprises a pure water fabrication device and a tail water/pure water storage device; the pure water fabrication device comprises a UF purification film filter core 1, a first flush valve 2, a low-voltage switch 3, a carbon fiber filter core 4, a first flush valve 5, an ultrafiltration water valve 6, a booster pump 7, an RO film filter core 8 and a third flush valve 9; the tail water/pure water storage device comprises a storage tank 15, a first check valve 10, a second check valve 11, a tail water proportional valve 12, a second high-voltage valve 14 and a first high-voltage valve 13; and the storage tank 15 comprises a pure water storage part 16 and a tail water storage part 17. By the technology, an intelligent, simple, compact, safe and convenient water purifier which is capable of saving water resources and achieving high-intelligence and long-term purification and is high in water preparation amount and free of tail water loss is provided.

The invention discloses an integrated molding process for blades for wind power generation. The process comprises the following steps of: laying an upper shell reinforcing material and a shearing rib reinforcing material in an upper mold; laying a vacuum bag film above the upper shell reinforcing material and the shearing rib reinforcing material; molding an upper shell and shearing ribs; laying airbags above the vacuum bag film, and laying a lower shell reinforcing material in a lower mold; carrying out mold matching on the upper mold and the lower mold, sealing mold-matched seams, and thus, the upper mold and the lower mold form a closed space; forming a lower shell by integrated molding; and demolding and cleaning. The integrated molding process has the benefits that the problems of long production cycle, high cost, low bonding strength, and the like caused by the fact that the upper shell and the lower shell are respectively molded and then bonded, in the traditional production process are solved, and internal cavities of the molded blades are effectively enabled to be consistent in shape by adopting the airbags.

The invention discloses a crystalline high polymer physical foaming material preparation method and is characterized in that the preparation method comprises the following steps: placing crystalline high polymer in an airtight container of which the volume is 25 times or more than 25 times of the total volume of the particles and the temperature T is not less than Tm which is the melting point of the crystalline high polymer and less than Tend which is the temperature at which crystal completely melts, keeping the crystalline high polymer in partial melting state with a little crystal or crystal particles, then injecting 8-20MPa of pressure gas, keeping the temperature and the pressure for 1-30min, then relieving the pressure in a speed of 5-20MPa/s to the normal pressure, taking out the material and cooling to obtain the foaming material. In the preparation method of the invention, the rigidity of the residual crystal particles in the high polymer and the physical crosslinked network are used to limit the free movement of the high polymer chain of the melt so that the high polymer melt can coat the gas, realize crystalline high polymer foaming and solve the problem that the foamability of the crystalline high polymer is poor.

The invention discloses a valve wear test device. The valve comprises a combustion chamber, a valve, a valve seat ring and a rotating device for driving the valve to rotate, wherein the valve seat ring is arranged in the combustion chamber, the valve penetrates through the valve seat ring to extend into the combustion chamber, and during testing, one valve surface of the valve is contacted with the valve seat ring. The device overcomes the defects of whole engine tests, the long actual engine comprehensive survey period and complexity, overcomes defects that hydraulic loading can cause leakage easily and the like, can finish wear characteristic evaluation of the valve in an extremely short test period and provides a reliable basis for actual production.

The invention discloses a rocker arm type valve wear test device which comprises a rocker arm platform, a rocker arm, a cam, a motor, a combustion chamber, a valve tapered head, a valve, a valve retainer and an impact spring for driving the valve to impact the valve retainer. A valve head of the valve stretches into the combustion chamber, the valve retainer is arranged in the combustion chamber, a valve rod of the valve stretches out of the combustion chamber, the valve tapered head is fixedly connected to the valve rod, the valve rod is sleeved with the impact spring, the two ends of the impact spring are connected with the valve tapered head and the combustion chamber respectively, the middle of the rocker arm is hinged to the rocker arm platform, one end of the rocker arm is the driven end driven by the cam, the other end of the rocker arm is a trigger end for driving the valve rod to move, and the motor is used for driving the cam to rotate. The device is driven by the motor, a roller makes contact with the cam, wear between the cam and the rocker arm is reduced, contact of the rocker arm and the valve is more accurate, and the wear condition produced when the rocker arm makes contact with the valve can be accurately observed.

The invention discloses a method embodiment for the clock switching, belonging to the technical field of the electronic communication, which comprises: judging whether the first clock signal output by the first clock module needs to be switched to the second clock signal output by the second clock module, if yes, the first clock signal with lower frequency is produced; the second clock signal and the first clock signal after the frequency decreasing are detected, and when the phases of the two clock signals are synchronous, the indicating information of the clock switching which switches the output clock signal of the first clock module to the output clock signal of the second clock module is output; according to the indicating information of the clock switching, the clock signal output by the first clock module is switched to the clock signal output by the second clock module. The invention also discloses a corresponding clock switching unit, a clock device and a system. The invention has an advantage of improving the harmful effects of the system performances caused by the clock switching.

The invention discloses a mining method for an asynchronous periodic pattern in a hydrologic time series. The mining method comprises the following steps of: firstly improving a partial periodic pattern mining algorithm based on a suffix tree so that the improved periodic pattern mining algorithm supports a multi-even series, thereby obtaining a candidate periodic pattern; and in an effective section generating process, putting forward an effective section generating algorithm which can be used for adjusting a candidate period in a self-adaptation manner, thereby avoiding period omission or space-time waste caused by a unified period. Compared with the prior art, the mining method provided by the invention can be used for more effectively finding the synchronous periodic pattern in the hydrologic time series.

The invention provides a preparation method of silver tin oxide electric contact materials. Firstly, a method for preparing a solution is adopted, an aqueous solution containing silver nitrate and tin nitrate reacts with a sodium carbonate aqueous solution containing a sodium hexametaphosphate dispersing agent, a mixture containing silver carbonate and tine carbonate is obtained under the action of high-speed stirring and the sodium hexametaphosphate dispersing agent, silver tin oxide compound powder with fine particles is obtained through the processing of filtering, forging and mechanical grinding, the preparation of the silver tin oxide electric contact materials uniform in component in the subsequence powder metallurgy process is facilitated, and the preparing process is environmentally friendly. The preparation method of the silver tin oxide electric contact materials is simple and easy to control, short in production cycle, low in pollution, low in cost and favorable for industrial production.

The invention discloses a steel structure safe fracture toughness determination method and a steel structure design safety checking method, and belongs to the technical field of test of mechanical performances of a material. The steel structure safe fracture toughness determination method comprises the following steps: testing the yield strength sigma y and the tensile strength sigma u of the material of a steel structure; calculating the load ratio Lr of the steel structure with the crack reaching an allowed maximum size under design conditions according to a formula of Lr=sigma ref/sigma y, wherein the sigma ref is the reference stress when the crack reaches the allowed maximum size; calculating the safe fracture ratio Kr of the steel structure according to a formula of Kr=(1-0.14Lr<2>)[0.3+0.7exp(-0.65Lr<6>)] when the load ratio is not greater than (sigma y + sigma u)/(2.sigma y); and calculating the safe fracture toughness Ks according to a formula of Ks=KI/Kr, wherein KI is the crack tip stress strength factor of the crack reaching the allowed maximum size. The steel structure safe fracture toughness determination method avoids the problems of high cost and long time brought by special condition requirements for determining the plane strain fracture toughness of the material, is simple and fast to realize by determining the safe fracture toughness through testing the yield strength and the tensile strength of the material, and is in favor of realizing engineering application.

The invention discloses a hot sizing device and hot sizing method for a thin-wall stamping part, and aims at solving the problems of warping and deformation of the thin-wall stamping part which is subjected to hot sizing to improve the production efficiency and reduce the production cost. The adopted technical scheme is as follows: the hot sizing device comprises a bottom plate (1) and positioning pins (5), wherein the positioning pins (5) are fixedly arranged at two ends of the bottom plate (1); the bottom plate (1) is provided with a plurality of loading boxes (2), a plurality of thin-wall stamping parts (3) can be placed in the loading boxes (2) in a stacked way, cavities inside the loading boxes (2) are matched with the thin-wall stamping parts (3) in size structure, and the stacked height of the plurality of thin-wall stamping parts (3) is aligned to the upper planes of the loading boxes (2); and the upper ends of the loading boxes (2) are provided with press plates (4), and the press plates (4) are sleeved on the positioning pins (5) so as to press the thin-wall stamping parts (3) in holes of the loading boxes (2).

The invention relates to a packaging using epoxy mould plastic superfine silicon micro powder dry method producing technology. It includes the following steps: adopting high purity quartz sand as raw material, mixing the material; taking magnetic separation removing iron, taking grinding by suitable grinding medium; taking refined classification to the material; taking dried surface modification to the product after classified; taking reclassification to gain the superfine silicon micro powder. The invention could replace the imported 0.13-0.1um TQFP packaged epoxy mould plastic superfine silicon micro powder.

The invention provides a manufacturing method for a TI-IGBT (Triple Mode Integrate-Insulated Gate Bipolar Transistor). The method comprises a step of providing a semiconductor substrate, and performing a first doping on the surface at one side of the semiconductor substrate; a step of annealing the semiconductor substrate to activate doped impurities in the first doping; performing a second doping which is opposite to the first doping in doping type on the semiconductor substrate, so as to enable the doping depth of the second doping is larger than or equal to the doping depth of the first doping and to enable the doping concentration of the second doping is larger than the doping concentrate of the first doping at different doping depths within the doping range; and scanning a to-be-formed second collector region in a region of the second doping using the laser so as to annealing the to-be-formed second collector region, activating doped impurities in the second doping in the to-be-formed second collector region to form a second collector region, wherein a region of the first doping, adjacent to the second collector region, is a first collector region. The method provided by the invention can reduce the production cost, improve the production efficiency, and solve problems of wafer warping or fragment.

The invention provides a production process of a high-gloss melamine impregnated paper decorative artificial board. A multi-daylight press is used to perform one-step hot pressing at a relatively low temperature, thus ensuring the favorable bonding between a substrate fiber board and melamine impregnated paper; and in the hot pressing process, resin in the melamine impregnated paper is molten and cured, thus forming a closed and compact surface, ensuring that pits and micro pores on the surface of the substrate fiber board can be filled, and ensuring insufficient resin curing, no board adhesion phenomenon and elasticity. Thus, on the premise of ensuring the production quality of the high-gloss melamine impregnated paper decorative artificial board, the invention adopts one-step hot pressing instead of the original cold-hot-cold process, thereby improving the pressing efficiency, reducing the pressing cost, increasing the production benefits, and reasonably and effectively avoiding the long production cycle and high energy consumption of the high-gloss melamine impregnated paper decorative artificial board.

The invention discloses low-formaldehyde chipboard and a preparation method thereof. The low-formaldehyde chipboard comprises a surface layer and a core layer, wherein the surface layer adopts formaldehyde-free soybean glue as an adhesive; the dosage of the formaldehyde-free soybean glue is 15-40% of weight of wood shavings on the surface layer; the core layer adopts urea-formaldehyde glue as an adhesive; and the dosage of the urea-formaldehyde glue is 8-20% of weight of wood shavings on the core layer. The low-formaldehyde chipboard reduces the formaldehyde release amount of full-urea-formaldehyde glue chipboard and ensures the production efficiency of the chipboard; and the mechanical property and various indexes of the chipboard can reach the national standard requirements, and the low-formaldehyde chipboard is low in formaldehyde release amount and reaches the grade of F four solid pentalphas (the supreme grade of four grades in F series standard in Japan).

The invention discloses an automatic driving vehicle based on a universal chassis. The automatic driving vehicle comprises a vehicle body, the universal chassis and a fixing piece; the vehicle body ismatched with the universal chassis and movably and detachably connected with the universal chassis through the fixing piece; the universal chassis comprises an automatic driving system, a power battery, a driving motor, a motor controller, wheels and wheel axles; the automatic driving system is used for sending an automatic driving signal; the power battery is connected with the motor controllerused for receiving the automatic driving signal and controlling the driving motor to rotate; the driving motor is connected with the wheel axles in a transmission mode; and the wheel axles are connected with the wheels in a transmission mode. According to the automatic driving vehicle, the vehicle body and the universal chassis are divided into two independent modules, thus a user can design the personalized vehicle body according to the preference of the user, during traveling, the vehicle body is mounted on the universal chassis provided by the third party and with an automatic driving function, and thus traffic can be achieved through the automatic driving function of the universal chassis.