296results about How to "Guaranteed steady state" patented technology

A portable telephone using a bone conduction speaker, enabling production of high output without an increase in the thickness of a housing of a telephone body and having no problem of the use in a noisy environment. In the portable telephone, a bone conduction speaker (1) is used as the speaker, a depression (3) having a diameter greater than that of the bone conduction speaker (1) is provided in a housing (2) of a telephone body, a cushioning material (4) is installed between the inner surface of the depression (3) and the outer surface of the bone conduction speaker (1), and the bone conduction speaker (1) is supported by the cushioning material (4) with a gap maintained between the speaker and the bottom of the depression (3) and with the vibration surface of the speaker being flush with or slightly projecting from the surface of the housing (2).

The invention relates to a high elastic corrosion resistant epoxy sealant and a preparation method thereof. The epoxy sealant provided by the invention comprises a component A and a component B in a weight ratio of 100:20-100:25. The epoxy sealant provided by the invention has advantages of high strength, high elasticity, low heat release, cracking resistance, good sealing performance and seawater corrosion resistance, is convenient for construction, and greatly improves sealing of key parts of ship stern tube.

The invention discloses a special adhesive for underwater construction, and the special adhesive comprises an A component and a B component at a weight ratio of 100:(20-100):25, wherein the A component is prepared from the following raw materials in parts by weight: 30-60 parts of modified epoxy resin, 5-30 parts of tackifier, 2-10 parts of accelerant, 5-15 parts of reactive diluent, 0.1-0.3 parts of surfactant, and 10-35 parts of filler powder; the B component is prepared from the following raw materials in parts by weight: 0-60 parts of ketimine, 0-60 parts of phenalkamine, 30-65 parts of modified polyamide, 1-6 parts of curing accelerator, and 2-15 parts of moisture repellent. The special adhesive for underwater construction has the advantages of being good in bonding strength in water, good in toughness, water-resistant, capable of resisting chemical attack, strong in initial viscous force and convenient to construct, and great improvement is brought for the underwater construction field.

The invention relates to a multi-strain microorganism pig feed additive and a production method thereof. According to the additive, bacillus subtilis, lactobacillus delbrueckii, saccharomyces cerevisiae, candida and photosynthetic bacteria are inoculated into a fermentation culture medium according to a ratio of 2:1:1:1:2, and are prepared into a finished product through solid fermentation. The microorganism preparation is reasonably matched, various microorganisms in the preparation can bring respective effects into play and depend on one another, the overall advantage of the microorganism preparation can be brought into play, the growth development and the improvement of the anti-disease capability of a host are facilitated, and the feed additive is safe to use and can improve the immunity of animals, prevent and resist diseases, prompt animal growth, improve the feed utilization rate and improve the feed quality.

The invention provides a probe based on double-signal amplification triggered by a target and application of the probe. The probe comprises a first hairpin, a second hairpin and a third hairpin, wherein the first hairpin, the second hairpin and the third hairpin are formed by pairing hybridization of complementary bases in folding areas after single-chain linear molecules are folded back; the parts, forming double-chain structures in the partial areas, of the hairpins are stem areas, and the parts, not forming the double-chain structures and folded back, are ring-shaped areas. According to the probe provided by the invention, the self-assembly of hairpins is realized through target protein catalysis, signal amplification is achieved under the assistance of an excision enzyme III, obvious amplification of a detection signal is realized, and the detection sensitivity is greatly improved further; since the probe does not depend on template replication in the detection process, the problem that false positive occurs due to cross contamination in the detection process is avoided, generation of a false positive signal is effectively prevented and background noise is reduced greatly.

The invention discloses curing formation equipment of a positive temperature coefficient (PTC) heating device. The curing formation equipment comprises an operating table, wherein a circuit board is fixedly arranged at one end of the operating table, a time relay and an AC contactor also can be laid on the operating table, a plurality of first fixed blocks are arranged on the circuit board at intervals, a positive pole head and a negative pole head are respectively arranged at two sides of each first fixed block, the PTC heating devices are arranged on the operating table, and a positive pole plate and a negative pole plate at electrode leading-out end heads of each PTC heating device are respectively and tightly clamped by a positive pole head clamping device and a negative pole head clamping device. In the operating table, positioning and push devices are arranged at two ends in a length direction, a shaping press device is arranged on a tabletop, and a groove can be formed in the tabletop. Compared with the prior art, the curing formation equipment is simpler in structure, the consistency, the reliability and the stability of a product can be obviously improved, and an obvious invention and creative effect is also brought to aspects of improving production efficiency, reducing manual cost and improving product consistency.

The invention discloses an unmanned surface vehicle preset performance tracking control method based on an RISE technology. The method can be used to solve an unmanned surface vehicle asymptotic tracking control problem of a uncertain system model parameter. The method mainly comprises the following steps of establishing a dynamic mathematical model of an unmanned surface vehicle; presetting transient tracking performance; carrying out tracking error transformation; designing a virtual controller based on a pushback design method; designing an adaptive tracking controller based on an RISE technology; and realizing track tracking control of the unmanned surface vehicle based on the adaptive tracking controller. In the invention, an adaptive feedforward control strategy based on the RISE technology is used to compensate system uncertain dynamics and external unknown disturbances so that the system outputs a reference track expected by asymptotic tracking, which means that a tracking error asymptotically converges to zero; and simultaneously, the preset performance control method can be used to ensure that a closed-loop system satisfies pre-assigned transient tracking performance (which means that the tracking error has a specified convergence speed and overshoot), and the robustness of the control system is increased.

The invention relates to a compensation method of two-freedom wave compensation system based on sea-sky line detection. The compensation method comprises the following steps: building a compensation system, collecting an image, calculating expansion and contraction quantity of compensation hydraulic cylinders, performing primary compensation and secondary compensation. The compensation method has the advantages that the horizontal attitude angle of a ship body is calculated according to a sea-sky line image collected by a CCD (Charged Coupled Device) industrial camera, the horizontal attitude angle is transmitted to an industrial control machine, the industrial control machine is used for performing inverse solution to obtain the expansion and contraction quantity of four hydraulic cylinders; a calculated compensation value is converted from a digital signal to an analog signal through a D / A converter; the analog signal is transmitted to an electrolyte server valve through a server amplifier; the server valve is used for controlling the expansion and contraction quantity of four compensation hydraulic cylinders according to the processed analog signal to realize real-time compensation for the rolling and pitching of an operation device on a movable platform; closed-loop control is performed through the difference between a measured value and a calculated valve, and the stability of the compensation system is further enhanced.

The invention provides a method for automatically testing the PCIE-SSD transmitting velocity and band width under Linux, and relates to a technique for testing the PCIE_SSD band width and transmitting velocity performance of a server. According to the invention, based on a linux operation system, detailed information of the kernel version, hard disk and PCIE_SSD of the Linux system is captured by utilizing commands uname-a, cat / proc / partations and fdisk-1 of the system; a drive is installed; all PCIE_SSD is formatted automatically; testing is carried out by utilizing a testing tool FIO according to the set testing standard parametric models of read, write, random read and random write of a memory disc and the block sizes of 4k, 8k, 16k, 32, 64k, 128k, 256k, 512k and 1024k. Automation is realized completely; the establishment time of a testing environment is shortened, and the stable performance result is guaranteed.

The present invention relates to a high-activity microbial protein forage and a preparation method thereof. The microbial high-activity preparation comprises the following components: 10%-20% of photosynthetic bacteria, 20%-40% of lactobacilli, 10%-20% of Saccharomyces cerevisiae Hansen, 20%-30% of bacillus subtilis, and 10%-20% of bifidobacteria. The microbial protein forage comprises the following components: dried fish, blood powder, soybean, soybean meal, peanut meal, DDGS forage, calcium hydrogen phosphate, salt, soybean oligosaccharides, microbial high-activity preparation and vitamin composite premix. In preparation, high-temperature puffing and stirring are performed on the dried fish, blood powder and soybean. The components such as soybean meal, peanut meal and DDGS forage are added. The microbial high-activity preparation is sprayed for being added, and then vacuum packaging is performed. The microbial preparation can also be adopted for preparing mixed forage for grices. The microbial high-activity preparation of the invention can be fed directly and has high feeding safety. The microbial high-activity preparation can be widely used for ecological cultivation of livestock, poultry and aquatic product. The high-activity microbial protein forage has the following advantages: improving forage conversion rate of the pig, preventing disease and treating disease, improving survival rate, purifying environment, reducing breeding cost, obtaining obvious yield and income increasing effect, and obtaining good popularization value.

The invention discloses a deep-water foundation construction method for a large-span continuous beam adjacent to an existing railway line. A deep-water foundation for construction comprises an underwater abutment and a plurality of drilled piles, wherein the underwater abutment is positioned on an underwater base rock on one side of the existing operating railway line, and the drilled piles are used for supporting the underwater abutment. The deep-water foundation construction method includes the steps: firstly, excavating an underwater foundation pit mounted at the bottom of a cofferdam by setting up an excavation platform, mounting an impact drill, moving the excavation platform and performing first impact, synchronous slag removal, second impact and synchronous slag removal; secondly, constructing the drilled piles and the underwater abutment by surveying and setting out, lowering a cofferdam, mounting a steel casing, sealing the bottom of the cofferdam, constructing the drilled piles, drawing water in the cofferdam, cutting off the steel casing and constructing the abutment. The steps are simple, the method is reasonable in design, simple and convenient in construction, good in use effect, safe and reliable in construction process and less in external influence, and the deep-water foundation construction process can be simply, conveniently and rapidly finished.

The invention discloses a scram button switch which comprises a shell body and a locking device, wherein an operating part is arranged inside the shell body. One end of the operating part is connected with a button, and a reset spring is arranged between the button and the shell body. The other end of the operating part controls contact or non-contact of a dynamic contact and a static contact in a base so as to achieve opening and closing of a circuit. The locking device is arranged between the operating part and the shell body. The locking device is composed of a clamping groove, a locking part and an elastic part, wherein the clamping groove is formed in the shell body, and the locking part and the elastic part are arranged in a horizontal groove of the operating part. The locking part is a long-strip-shaped part, one end of the locking part is a working end, and the working end is adapted to being clamped in the clamping groove under the function of the elastic part and locks the operating part. Under the function of traction / rotation of the button, the locking part quits from the clamping groove and unlocks the operating part. Both ends of the locking part are working ends and arc surfaces. When one end of the locking part is matched with the clamping groove, the one end is suitable for being contacted with the upper end face of the clamping groove. The other end of the locking part is suitable for being contacted with an edge point of the clamping groove. The scram button switch solves the technical problems of complex structure and multiple accessories.

The invention discloses a fracture coal-rock mass quasi-three dimensional prestressed reinforcement method. The fracture coal-rock mass quasi-three dimensional prestressed reinforcement method comprises the steps that initial support of anchor net cables is conducted, tunneling and concrete spraying are conducted simultaneously, yielding anchor rods are mounted on the two sides and a roof of a roadway, and yielding anchor cables are mounted on the central line and the arch corner parts on the two sides of the roof correspondingly; secondly, slurry-injecting reinforcement is conducted, specifically, expansible slurry is injected into coal-rock mass on the two sides and the roof of the roadway; thirdly, concrete with the thickness being 100 mm is sprayed again; and fourthly, reverse arch reinforcement is conducted. The coal-rock mass subjected to slurry-injecting reinforcement is in a quasi-three dimensional stress state, and the bearing capability is improved obviously.

The invention relates to a front suspension system for a motorcycle, which comprises a frame and a front wheel positioned in front of the frame. The front wheel is fixedly connected with a steering knuckle through a front wheel hub component, the steering knuckle is respectively connected with a steering mechanism and a shock-absorbing mechanism, the shock-absorbing mechanism comprises a rocker only transversely arranged on a single side of the front wheel, the front of the rocker is connected onto the steering knuckle, and the rear of the rocker is connected with the frame through a shock absorber. The front suspension system separates a steering function from supporting and shock-absorbing functions, is capable of absorbing and releasing impact of a road surface on the front wheel to a maximum degree, so that shock of steering handlebars and a motorcycle body is reduced, and driving comfortableness and maneuverability of the motorcycle are improved.

The invention provides a workbench with the flip function. The workbench with the flip function comprises a base, supporting columns and a flip plate; the lower ends of the supporting columns are connected onto the base; the flip plate is arranged at the upper ends of the supporting columns and used for flipping a target material substrate; the flip plate comprises two supporting plates; the two adjacent ends of the two supporting plates are flexibly connected with each other; the angle formed between the two supporting plates is adjusted through a driving device. During usage, the distance between the surfaces of the two supporting plates is adjusted through the angle adjustment between the two supporting plates and accordingly the target material substrate can be flipped conveniently. In the process, the target material substrate can be flipped rapidly and conveniently, the deformation and scratch of the target material substrate can be effectively avoided, and the quality of the target material substrate can be guaranteed.

The invention discloses a warped-tail wave energy collecting device based on a floating platform. The warped-tail wave energy collecting device comprises a warped-tail wave absorption floater which islocated between a pair of ship type side appendages. The upper end of the warped-tail wave absorption floater is connected with a transmission shaft, and the lower portion of the warped-tail wave absorption floater half floats in water. The two ends of the transmission shaft are connected with the upper ends of the ship type side appendages through a bearing and a bearing support respectively. Awave lifting plate is arranged below the warped-tail wave absorption floater, and the two sides of the wave lifting plate are connected with the ship type side appendages respectively. A front supporting frame and a rear supporting frame are connected between the ship type side appendages. An n-shaped support is transversely arranged above the warped-tail wave absorption floater, and the bottoms of n-shaped support stand columns are fixedly connected to the tops of the ship type side appendages respectively. A hydraulic cylinder is arranged between an upper cross beam of the n-shaped support and the planar back face of the warped-tail wave absorption floater. The design of the device has high cost performance, and is beneficial for industrialization.

The invention discloses full-automatic machine part visual flaw detection equipment. The equipment comprises a feeding device and a detection device, the feeding device is connected with a feeding rail, the detection device comprises a first view finding mechanism, a first conveyor, a turnover mechanism, a second view finding mechanism, a second conveyor, an arrangement mechanism and a third viewfinding mechanism, an output end of the feeding rail faces the first conveyor, the first conveyor is positioned above the second conveyor, the turnover mechanism faces the second conveyor, and the arrangement mechanism is positioned between the second conveyor and the third view finding mechanism. The invention also discloses a full-automatic machine part visual flaw detection method. According tothe equipment and the method, through the cooperation of a vibration disc, the first view finding mechanism, the first conveyor, the turnover mechanism, the second view finding mechanism, the secondconveyor and the third view finding mechanism, comprehensive, efficient and rapid detection on the front surface, the back surface and the side wall of a part is realized, the false detection rate isreduced, the correct and reliable detection result is ensured, the detection efficiency is accelerated, and the cost is effectively reduced.

The invention relates to an agricultural livestock breeding technology, in particular to a sow feeding method for increasing the survival rate of piglets in the suckling period. The method includes the steps that after delivery of sows, the sows are fed with compound feed 3 times each day at the time interval of 4 hours or longer; the sows are fed with 2.5 kg of compound feed on the first day after delivery, the feeding amount is increased by at least 0.5 kg each day afterwards and is increased by at least 1 kg each day from the sixth day, and the feeding amount reaches 6.5 kg-7.5 kg on the eighth day and is kept till the piglets are weaned on the twenty-fifth day; from the first day to the twenty-fifth day after delivery of the sows, the sows drink water freely. The compound feed comprises corn flour, peeled soybean meal, imported fishmeal, tapioca flour, sweet potato leaf flour, microbial addictives, calcium hydrophosphate, plasma protein powder, astragalus polysaccharide, bentonite and premix. The feeding method is scientific and reasonable; in combination with the compound feed, in the suckling period, the sows grow healthily, and the survival rate of the piglets is obviously increased.

The invention provides a fault-crossing tunnel flexible isolation structure and an engineering rock mass large deformation disaster control method, the flexible isolation structure comprises a giant NPR anchor cable, a monitoring unit and an acquisition unit, the giant NPR anchor cable comprises a constant resistance body, a constant resistance sleeve and an anchor cable, and the constant resistance body is arranged in the constant resistance sleeve. The method comprises the steps of S1, directly drilling a hole in a shallow-buried section of a tunnel from the earth surface or excavating a setspace area from the earth surface and then laying an NPR anchor cable, and excavating a pilot tunnel in a deep-buried section of the tunnel from the inside to the outside of the tunnel; S2, performing support construction on the space area; S3, placing the giant NPR anchor cable after penetrating through a fault; and S4, anchoring an anchoring section. Three-dimensional stitching is carried out on strong-activity geological areas such as a tunnel crossing fault or an active fault through construction of the giant NPR anchor cables, the purpose of area locking is achieved, and monitoring, early warning and supporting integrated control over the tunnel crossing strong-activity geological areas is achieved.

The invention relates to the technical field of ships and particularly relates to an underwater floating body and an installing method thereof. The floating body comprises divided cabins and pressure-resistant cabins, wherein the left side and the right side of the floating body are symmetrically provided with the divided cabins; the front side and the rear side of the floating body are respectively provided with the divided cabin; the buoyancy provided by the divided cabin at the front side of the floating body is larger than that provided by the divided cabin at the rear side of the floating body or the buoyancy provided by the divided cabin at the rear side of the floating body is larger than that provided by the divided cabin at the front side of the floating body. The pressure-resistant cabins penetrate through the divided cabins and are fixedly connected with the cabin walls of the divided cabins. The floating center of the floating body and the gravity center of the floating body are in the same vertical line, and the position of the floating center of the floating body is higher than the position of the gravity center of the floating body. The pressure-resistant cabins are provided with inflation valves, and the divided cabins are provided with venting systems and water introducing systems. The installing method comprises the steps of: inflating the pressure-resistant cabins and filling water into the divided cabins; falling the underwater floating body down to a working water area; inflating air into the divided cabins to discharge a part of water in the divided cabins, and enabling the divided cabin to generate upward buoyancy. According to the underwater floating body and the installing method provided by the invention, the working water area can be reached by one time, so that a great amount of labor and materials is saved.

The invention relates to a material extravehicular exposure apparatus. The apparatus comprises: a base; a test box detachably mounted on a locking and supporting mechanism; a rotary lifting device mounted in the middle of the base, connected with the locking and supporting mechanism and driving the locking and supporting mechanism to rotate and lift; a positioning device which is driven by the rotary lifting device to rotate and lift, can be elastically supported on the base and is used for detecting the position state of the rotary lifting device in the rotary lifting process; and an inspection mechanism installed on the base and capable of moving within a preset range in the circumferential direction of the base. The exposure device disclosed by the invention can provide extravehicular exposure resources for materials such as metal materials, non-metal materials, composite materials and the like, the on-orbit rapid replacement of a material exposure sample device is realized, closedprotection is provided for an exposure material, the surface appearance of the exposure material can be monitored in real time according to material exposure requirements or ground instructions, and data acquisition, transmission, on-orbit information management and the like of a material exposure experiment can be realized.

The invention discloses a child dining chair, which consists of four-pin post and child chair, wherein the dish is put in front of chair, which connects chair through fixing part and moves along chair; the upper end of support rack connects through rotary knuckle within button; the button resists gear and spring with gear chucking knuckle; the fixing part connects chair through rivet, which contains blocking groove; back pin of chair is transverse the blocking groove.

The invention provides a flexible isolation structure of a fault-crossing tunnel and a rock mass large deformation control method, the flexible isolation structure comprises a giant NPR anchor cable,a monitoring unit and an acquisition unit, and the giant NPR anchor cable comprises a bearing plate, an anchorage device and an anchor cable. The bearing plate is annular and is installed at a drilling opening. The anchorage device abuts against the bearing plate. The method comprises the steps that S1, holes are directly drilled in the shallow-buried section of the tunnel from the earth surface or NPR anchor cables are arranged after a set space area is excavated from the earth surface, pilot tunnel excavation is conducted on the deep-buried section of the tunnel from the inside to the outside of the tunnel, S2, supporting construction is conducted on the space area, and S3, the giant NPR anchor cable is placed after the giant NPR anchor cable penetrates through the fault; and S4, the anchoring section of the giant NPR anchor cable is anchored. According to the method, three-dimensional stitching is carried out on the strong-activity geological area by constructing the giant NPR anchor cable, the purpose of area locking is achieved, and monitoring, early warning and supporting integrated control over the tunnel passing through the strong-activity geological area is achieved.

The invention relates to a machine tool fixture, in particular to a special flat floating fixture for a precision honing machine. The fixture comprises a fixture base and a fixture body, and is characterized in that a supporting seat is fixedly arranged on the fixture base, and the middle of a lever is rotatably connected with the supporting seat; one end of the lever is provided with a U-shaped groove, and a cylindrical guide compaction sleeve is arranged in the U-shaped groove in the lever through two pin shafts which are symmetrically distributed and are fixedly arranged on the peripheral surface of the cylindrical guide compaction sleeve; a compaction oil cylinder is arranged on the fixture base at the lower part of the other end of the lever, and the top end of a piston rod in the compaction oil cylinder corresponds to the lower surface of the other end of the lever. The technical scheme adopts a lever principle combined with floating connection, so that the current status of the uneven distribution of compaction force can be effectively changed; the machine tool fixture has the characteristics of simple structure, convenience in adjustment, good compaction and positioning effects, high precision and the like.

The invention discloses a carton automatic folding device. The carton automatic folding device is characterized by comprising a left edge folding mechanism, a rear edge folding mechanism, a front edgefolding mechanism and a right edge folding mechanism. The left edge folding mechanism comprises a first support, a first horizontal air cylinder, a first sucker, a first turn-over air cylinder and afirst turn-over pressing plate. The rear edge folding mechanism comprises a second support, a second horizontal air cylinder, a second sucker, a second turn-over air cylinder and a second turn-over pressing plate. The front edge folding mechanism comprises a third support, a third turn-over air cylinder and a third turn-over pressing plate. The right edge folding mechanism comprises a fourth support, a fourth turn-over air cylinder and a fourth turn-over pressing plate. Automatic folding of four edges at the bottom of a carton can be achieved, and production efficiency can be improved. In addition, the invention further discloses a carton sticking machine.

The invention relates to a non-linear mechanical system type fixed time control method considering actuator faults, which designs a robust control technology of a type of fixed-time convergence so that the system not only can adaptively process the fault problem of an actuator, but also can ensure that the mechanical system reaches a stable state within a time range given by a user, and the steady-state performance and the transient-state performance of the system are both within pre-designed performance indexes. The method has the following advantages: the mechanical system enters the steadystate before this time, namely, tracking an expected track with high precision is achieved to ensure the successful completion of a task; the self-adaptive law can achieve self-adaptive compensation autonomously and ensure the stability of the mechanical system; the transient parameters (such as convergence time and convergence rate) and steady-state parameters (steady-state tracking error) of themechanical system can be designed independently by the technical users, the parameters are closely combined with engineering technical indexes, so that the method is very suitable for engineering application.