32results about How to "Overcome applicability" patented technology

The invention provides a hole interior variable-frequency vibration anti-reflection gas extraction method and device. The hole interior variable-frequency vibration anti-reflection gas extraction device comprises a variable-frequency ultrasonic generator, an ultrasonic transducer, a gas extraction pump, a gas extraction pipe, an electric cabinet and a mounting shell. One end of the gas extractionpipe is connected with the gas extraction pump, and the other end of the gas extraction pipe is provided with a multi-hole section; a magnetic layer is arranged on the outer wall of the multi-hole section, and the mounting shell is provided with an electromagnetic cambered surface matched with the outer wall of the gas extraction pipe in shape; the ultrasonic transducer is fixed in the mounting shell, and after first explosion-proof guide wires are connected in series, the electromagnetic cambered surface is connected with the electric cabinet through a double-point double-throw switch; aftersecond explosion-proof guide wires are connected in series, the ultrasonic transducer is connected with the ultrasonic generator, and the double-point double-throw switch is adjusted to change the current direction so that magnetism of the electromagnetic cambered surface can be changed; and through the attractive or repelling effect between the magnetic layer and the electromagnetic cambered surface, the mounting shell is fixed to the multi-hole section of the gas extraction pipe or the inner wall of a drill hole.

The invention relates to an on-line sampling device for multi-phase flow liquid. The device comprises a container which is uprightly installed, wherein the lateral surface of the upper end of the container is provided with a hole which is connected with an inlet pipeline, a spiral passage with a downward spiral angle is arranged in the container, and the inlet pipeline is connected with an inlet of the spiral passage; and the inner wall of the lower part of the container is welded with an annular liquid storage bin, 'L'-shaped diversion baffle plates are uniformly distributed on the inner wall of the container between the liquid storage bin and an outlet of the spiral passage, the upper end of the container is connected with a gas discharging pipeline, the lower end of the container is connected with a discharging pipeline of a process system, and the bottom of the liquid storage bin is connected into a liquid sampling and discharging pipeline. The device has the advantages of novel design, simple structure, elimination of movable component, high safety and reliability, convenience in installation, low cost, good applicability, high sampling quantity and high sampling accuracy and has obvious significance for reducing the product cost of a multi-phase metering product and improving the measurement accuracy of the phase division rate.

The invention discloses a continuous-type instrument for precisely measuring the thickness of a cold-rolled sheet, and belongs to the technical field of cold-rolled sheet measurement instrument, wherein the instrument is used for continuously and precisely measuring the thickness of the cold-rolled sheet. The technical scheme of the invention is that a measurement platform is fixedly disposed on a rack; a horizontal movement mechanism is disposed on the rack above the measurement platform; a vertical movement mechanism is disposed on a horizontal movement plate of the horizontal movement mechanism; a thickness measurement mechanism is disposed on a vertical movement platform of the vertical movement mechanism; a measurement device of the thickness measurement mechanism is vertically set to be downwards, and is opposite to the surface of the measurement platform. The instrument is simple in structure, is simple and convenient in operation, is good in adaptability, stability and precision, can carry out the continuous and precise measurement, eliminates errors in the simulation of an overall thickness curve of a steel plate through a connection line after conventional multipoint measurement, shortens the measurement time, and alleviates the labor intensity. The invention provides new equipment for the detection of the cold-rolled sheet, and provides technical support for the improvement of the quality of the cold-rolled sheet.

The invention discloses an essence microcapsule and a preparation method thereof. The essence microcapsule comprises a core material, a polymer layer, a wall material and antibacterial particles. The preparation method comprises the following steps of (1) dissolving a polymer into an organic solvent, adding the core material and mixing evenly to obtain a mixed solution; (2) dissolving a second colloid protective agent into water, adding the mixed solution obtained in the step (1) while stirring, raising the temperature to 10-15 DEG C higher than a boiling point of an organic solvent and carrying out heat preservation for 0.5-1h to obtain a polymer pre-coated core material; and (3) adding the wall material, mixing evenly, curing at 60-70 DEG C for 3-5h, filtering, drying and spraying a solution containing the antibacterial particles and drying. The essence microcapsule is adjustable in size and structure, is modified with the antibacterial particles on the surface, and is excellent in antibacterial effect; the microcapsule can be grafted and modified; and the microcapsule is endowed with a new function. The preparation method is good in universality, simple, fast and economical, and the core materials of various properties can be coated according to the requirements of different industries.

The invention discloses a calculation method for machining deformation caused by a surface machining residual stress field. In the method, through the modeling and the analysis of a part surface machining residual stress field, the action of the surface residual stress field for deformation is equivalent to one group of surface force and edge force. Corresponding surface force and edge force is applied in a finite element model to finish deformation calculation caused by the surface machining residual stress field. Compared with a traditional method, the method disclosed by the invention needs a small unit number, does not have special requirements on mesh generation, a large-scale problem can be processed, and the application of the calculation method on the large blades of a steam turbine and an aircraft engine as well as a marine large-scale propeller becomes possible.

The invention relates to a digital video image fusion and superposition method, and belongs to the field of digital video images. According to the method, two paths of video images are fused accordingto a relation between an upper layer and a lower layer, a background layer video image covers a superposition layer video image, a DDR memory is used as a video frame cache, a read-write clock domainis separated, and a superposition layer video image clock domain control signal is written into the frame cache; a background layer video image clock domain control signal is used to cache and read out a video frame, a four-frame caching strategy is used to read and write a superimposed layer video image, and a virtual frame caching space strategy is used to indirectly achieve the fusion and superposition control of the superimposed layer video image and a background layer video image. The background layer video image in the output fused video image can be windowed at different positions to display the content of the superimposed layer video image. The fusion superposition method is low in power consumption, simple in logic implementation, high in precision, low in delay, flexible in configuration, autonomous and controllable, and fused video frame jitter is eliminated.

The invention relates to a compressed sensing low-field magnetic resonance imaging algorithm. The algorithm comprises the steps that collected low-field magnetic resonance original data is subjected to undersampling, and random variable density K spacial data is obtained; undersampled K spacial data and a compressed sensing theory are combined for modeling, the modeling problem becomes a linear combination minimization problem containing a data fidelity term, a sparse prior term and a total variation term, and dual tree wavelet transformation and wavelet tree sparse joint serve as sparse transformation in the compressed sensing theory; by means of the dual tree wavelet transformation and wavelet tree sparse joint compressed sensing magnetic resonance imaging algorithm, solution is conducted, and a low-field magnetic resonance image rebuilt by the undersampled variable density K spacial data is obtained. Dual tree wavelet transformation is introduced to serve as sparse transformation ina CS-MRI model, and the defect that due to the fact that traditional wavelet transformation has sensibility and shift variant, lacks direction and has a rebuilding image, aliasing artifacts are caused is overcome. The computing accuracy is high, robustness is good, and the signal-to-noise ratio of the rebuilding image is increased while the imaging speed is increased.

The invention discloses a multifunctional portable clothes hanger. The triangular clothes hanger is composed of a hook, two hanging arms and a clothes hanger beam, the hook is connected with the two hanging arms through a first hinge shaft, the two hanging arms are connected with the clothes hanger beam through a second hinge shaft, the center of the clothes hanger beam is provided with a third hinge shaft, a first inner groove, a spring and a baffle are arranged in the hook, one end of the spring abuts against the baffle, the other end of the spring is connected with an insertion piece, the insertion piece is movably inserted into the hook, the insertion piece is provided with a boss, and the boss extends out of the hook. The multifunctional portable clothes hanger can be folded on the whole and is convenient to store, the defects that a traditional clothes hanger is single in function, poor in adaptation, easy to blow off and the like are overcome and certain gain effects are achieved.

The invention provides a signal conditioning circuit of an ACFM (Alternating Current Field Measurement) digital detector, comprising a signal input circuit, a program control gain amplification circuit, a band-pass filtering circuit, a gain adjustable amplification circuit, a true effective value conversion circuit, a signal output circuit, an MCU (Micro-programmed Control Unit) interface and a self-adapting clock signal. The signal conditioning circuit is characterized in that: the signal input circuit is connected with the program control gain amplification circuit; the program control gain amplification circuit is connected with the band-pass filtering circuit; the band-pass filtering circuit is connected with the gain adjustable amplification circuit; the gain adjustable amplification circuit is connected with the true effective value conversion circuit; the true effective value conversion circuit is connected with the signal output circuit; the MCU interface is connected with the program control gain amplification circuit and the band-pass filtering circuit; and the self-adapting clock signal is connected with the band-pass filtering circuit. The signal conditioning circuit has the technical effects that: the defects that the applicability of the existing ACFM signal conditioning circuit is poor, the measurement type is single, the measurement precision is not high and the digital control cannot be realized are overcome; the signal conditioning circuit has the characteristics of wide applicable range, high detection precision, digital controllability and stable and reliable work, and can be applied to the signal conditioning circuit of the ACFM digital detector with the high cost performance.

The embodiment of the invention provides a project development method and device. The method comprises steps of firstly, carrying out flow division on business processes of a target project; configuring a data processing module for each sub-flow obtained after the division; finally, according to an execution target of each flow, connecting the data processing modules and the sub-flows so as to obtain a task execution flow chart of the target project; and by use of the obtained task execution flow chart, finishing execution of the corresponding target project. In this way, according to the execution target of the target project, division of the sub-flows and configuration of the data processing modules can be flexibly and visually carried out; connection relations of the sub-flows and the data processing module can be easily determined; a task execution flow chart can be quickly and highly efficiently set for the target project; development of the target project can be highly efficiently finished; and a user is capable of finishing highly-customized project development under the condition that codes are not corrected.

The invention relates to a target orientation and distance combined sparse reconstruction positioning method based on a seabed horizontal L-shaped array. The method comprises the following steps: laying a horizontal L-shaped array at the seabed, receiving sound signals emitted by multiple targets near the sea surface, and obtaining a source matrix of the multiple targets; in the azimuth and distance two-dimensional plane of the target, obtaining a sparse source matrix about the target; obtaining a sparse array matrix about N-element L-shaped array receiving signals; reconstructing a sparse signal by using the obtained sparse array matrix and the normalized sparse source matrix; adopting a norm regularization method to carry out optimal solution on the reconstructed sparse signals; and determining the orientation and distance information of the target according to the spectral peak position and intensity of the spatial spectrum, and judging the relative size of the target power. According to the method, the influence of multipath interference on the target azimuth-distance joint estimation precision can be effectively stripped and reduced, the target positioning result without spatial ambiguity is obtained, and the position information and the relative intensity of multiple targets can be accurately obtained at the same time.

The invention discloses an inertia estimation method based on a single neuron network and an adaptive adjustment strategy thereof. Firstly, an inertia estimation method based on a single neuron network is disclosed, the method introduces the single neuron network, and gain factors are dynamically adjusted according to deviation between a reference model and an estimation model by utilizing the strong self-learning capability of the single neuron network, so that the estimation model is closer to the reference model; secondly, the invention also discloses an adaptive adjustment strategy for theinertia estimation method, which adaptively adjusts the proportionality coefficient of neurons based on an instantaneous error energy function capable of reflecting error changes in real time, and limits the output of the strategy at the same time. According to the inertia estimation method provided by the invention, the estimation precision of inertia can be remarkably improved, the applicable working condition is not limited, and the implementation of an adaptive adjustment strategy enables an inertia estimation result to realize better compromise between stability and convergence speed. The method is simple in calculation and easy to debug, and can be used on line.

The invention discloses an encapsulation body of a capsule type endoscope. The encapsulation body comprises a capsule type endoscope body, and holding parts are arranged on the two sides of the capsule type endoscope body respectively and used for fixing the capsule type endoscope body. Ultraviolet disinfection lamps are installed on the inner sides of the holding parts respectively and electrically connected with a power interface in a base. Internal bases are installed on the two sides at the lower end of the capsule type endoscope body respectively, the internal bases are fixedly connectedwith the holding parts respectively, holding columns are arranged on the two sides in the middle of the base respectively, a fixing strip is arranged between the two holding columns, a fixing strip switch is arranged at the upper end of the left holding column, and the fixing strip switch controls a fixing strip slot. By means of the encapsulation body of the capsule type endoscope, it is effectively avoided that the capsule type endoscope is hit to result in wear damage, a hand strap is arranged on an outer box so as to facilitate carrying, and the space utilization efficiency of the encapsulation body is improved; when the ultraviolet disinfection lamps are arranged in the encapsulation body, after the endoscope is used, disinfection is automatically conducted without manual operation, and the manual disinfection time is saved.

The invention discloses a random forest-based multi-scale stratified sampling high-resolution satellite image change detection method. The method adopts an idea for an object, multi-scale stratified sampling is carried out to automatically acquire multi-scale training samples, and sub-scale samples and current-scale samples are combined; a training sample spectrum is then extracted, and texture and shape features are fused together to form feature space, the sample combination and the corresponding feature space are inputted to a random forest to train multiple change classifiers, and a classifier with the minimum out-of-bag error parameter is selected as a change detection classifier for change detection. In comparison with the traditional method, according to the multi-scale stratified sampling method disclosed in the invention, multi-scale feature information is considered, training samples are automatically added to a change area and a non-change area while the manual workload is not increased, the training sample feature generalization ability is improved, classification change detection is carried out, the method is simple, the operability is strong, and the scalability is good.

The invention discloses a gas pressure control system of a pressure cabin for a medical security car capable of realizing highland pressurization, which comprises an automatic air inlet valve, an automatic CO2 exhaust valve, a CO2 sensitive element, an O2 sensitive element, a gas concentration display instrument, a gas pressure display instrument, automatic control equipment and a booster fan, wherein the automatic air inlet valve and the automatic CO2 exhaust valve are arranged on the inner wall of the pressure cabin; the CO2 sensitive element, the O2 sensitive element, the gas concentration display instrument, the gas pressure display instrument, the automatic control equipment and the booster fan are arranged on the inner wall of the pressure cabin; the CO2 sensitive element and the O2 sensitive element are connected with the gas concentration display instrument and the gas pressure display instrument through signals; the gas concentration display instrument, the gas pressure display instrument, the automatic air inlet valve and the automatic CO2 exhaust valve are respectively connected with the automatic control equipment through signals; and the booster fan is connected with the automatic air inlet valve through signals. According to the gas control system of the pressure cabin for the medical security car capable of realizing the highland pressurization, the defects in the prior art of poor reliability, poor safety, poor applicability, inconvenience for use and the like can be overcome, so that the advantages of high integrated level, good reliability, good safety, good applicability and convenience for use are realized.

The invention discloses an automatic manipulator. The automatic manipulator is a double-arm rotation type manipulator for feeding and blanking in a hardware machining procedure and structurally comprises a rotating shaft, a lifting shaft, a lifting shaft body, a first mechanical arm, a second mechanical arm, a first mechanical gripper and a second mechanical gripper, wherein an included angle formed by the first mechanical arm and the second mechanical arm ranges from 90 degrees to 120 degrees; the first mechanical arm and the second mechanical arm can horizontally rotate along with the rotating shaft; the lifting shaft is fixed on the lifting shaft body, and the rotating shaft is fixed at the top end of the lifting shaft and can move up and down along with the lifting shaft. The automatic manipulator realizes the functions of automatic and flexible material taking and discharging and the like, can be applied to stamping in a single procedure and also can be applied to stamping at multiple stations in the whole production line, the technical problems that application of existing equipment is single, the operation efficiency is low and industrial accidents are easily caused are solved, and the operation efficiency, flexibility and safety are improved.

The invention discloses an ultrasonic vibration auxiliary milling force modeling method based on finite element simulation, which takes tool parameters, cutting parameters and vibration parameters into account, and comprises the following steps: firstly, dispersing a blade into a series of infinitesimal elements along the axial direction, and calculating instantaneous cutting thicknesses of different cutting positions of the infinitesimal elements; then, using a response surface method for designing a simulation scheme about cutter parameters, cutting parameters and vibration parameters, performing a series of bevel angle cutting simulation through ABAQUS, extracting simulation cutting force, and obtaining a regression equation for calculating infinitesimal cutting force; and finally, calculating the cutting force of the infinitesimal at different cutting positions through a regression equation, and performing coordinate transformation and integral summation to obtain a predicted value of the ultrasonic vibration milling force in the milling process. The method can solve the problems that an existing modeling method is long in experimental period and high in experimental cost, and the applicability and reliability of the milling force model are improved.

The invention discloses a dimension building method for an equipment management platform based on Internet of things. The method comprises steps: user equipment and a server build connection, or new equipment is added, and the new equipment and the server build connection; according to the physical addresses of the equipment, equipment clusters are built; an operation and maintenance platform is built for each equipment cluster, and the operation and maintenance platform acquires the working condition of the equipment through the server. And, according to demands, updating and adaptation are carried out on the equipment. The problems of tedious equipment management and high management cost in the prior art can be solved; through building of the management platform, the working condition of the equipment can be timely acquired, and a large amount of labor consumed through manual regular inspection in the prior art is omitted. Besides, through the adaptation technology of the equipment, all-match equipment becomes possible, and the restricted problem brought by suitability of the equipment to the management platform can be overcome.

The invention relates to a nitrate group transfer reagent as well as a preparation method and application thereof, in particular to a novel organic acyclic trivalent iodine nitrate group transfer reagent and a preparation method thereof. The nitrate ester group transfer reagent has a general formula: the structure of the nitrate ester group transfer reagent is an acyclic trivalent iodine ether structure with an iodine-oxygen-iodine skeleton. Compared with the prior art, the reagent disclosed by the invention takes iodobenzene as a starting raw material, and a pure product can be obtained through two-step reaction and recrystallization, so that the reagent has the advantages of easily available raw materials, simplicity and convenience in operation, high synthesis efficiency, high product yield, high product purity and the like. The reagent is good in stability and high in reaction activity, and various nitric acid esterification reactions can be achieved without a catalyst.

The invention provides a star map wavelet denoising method based on a local abnormal factor, which combines wavelet transform with a local abnormal factor LOF algorithm, and applies an abnormal valuedetection algorithm to wavelet denoising on the basis of wavelet transform, thereby realizing star map denoising and star point extraction.

The invention discloses a towel and a manufacturing method of the towel, and relates to the technical field of daily necessities. The towel comprises a towel body; the towel body comprises bottom cloth and surface cloth which is compounded on the upper surface of the bottom cloth; the edge of the towel body is formed by cutting by utilizing an ultrasonic technology; patterns which are pressed by utilizing an ultrasonic embossing technology are arranged on the surface of the towel body. Through such arrangement, heat energy can be produced at the edge of the towel body by utilizing the ultrasonic technology; when the edge is cut, the temperature reaches the temperature of serging edges and burning off excessive threads, so that the edges are not serged and the threads are not burnt off manually; cracking, fuzzing, unthreading and laddering of the towel are avoided; time and labour are saved; the efficiency is improved; the yield is increased; meanwhile, the patterns are pressed by utilizing the heat energy produced by the ultrasonic embossing technology, which is suitable for the towels with long fibres and short hair; the application range is wide; the disadvantage of printing or high-pressing pressing are overcome; the embossed patterns are good in three-dimensional feeling and durability, clear in edges, and difficult to deform.

The invention provides a preparation method for a brown micro arc oxidation film of the surface of a casting aluminum base composite material. According to the preparation method for the brown micro arc oxidation film of the surface of the casting aluminum base composite material, the problem that an existing prepared brown micro arc oxidation film of the surface of the casting aluminum base composite material is poor in corrosion resistance, hardness and roughness is solved. The preparation method comprises the following steps that (a), the surface of a workpiece is washed after being polished; (b), 2-4 g / L of NaOH, 1-2 g / L of CuSO4, 8-15 g / L of Na2SiO3, 10-15 g / L of (NaPO3) 6, 5-10 g / L of Na2WO4 and 3-8 g / L of EDTA are added into deionized water and stirred till ample dissolution is achieved; (c), the workpiece is stored into a solution, a micro arc oxidation power source is opened, and power source parameters are set; (d), after oxidation is conducted for 20-30 min, the power source is closed; and (e), the workpiece is completely washed and dried in air. According to the preparation method for the brown micro arc oxidation film of the surface of the casting aluminum base composite material, compactness of the oxidation film is further improved, and meanwhile, the hardness of a film layer reaches up to HV 1500-2200.

The invention provides a real-time geometric calibration method for internal and external orientation elements of a remote sensing satellite, which comprises the following steps: acquiring remote sensing images of different satellites and loads, and selecting corresponding reference images according to imaging resolution information of the remote sensing images; performing image matching on all the effective scenes in the same track and the corresponding reference image to obtain a control point of each effective scene; establishing an in-orbit internal and external orientation element calibration model, selecting local scene indefinite calibration, external calibration or internal and external simultaneous calibration according to the distribution condition of effective scene control points, and calculating calibration parameters of the calibration scene according to the in-orbit internal and external orientation element calibration model; after on-orbit internal and external orientation elements are calibrated, optimal calibration parameters are selected for each on-orbit effective scene one by one; and regenerating a geometric correction product according to the selected calibration parameters, and checking the geometric accuracy of the geometric correction product. According to the invention, the calibration efficiency and the geometric positioning precision of the image are improved.

The invention belongs to the technical field of Chinese medicine, and discloses a traditional Chinese medicine composition for treating adenomyosis and a preparation method of the traditional Chinese medicine composition for treating the adenomyosis. The composition is prepared from the following raw materials: 10 to 20 g of caulis spatholobi, 10 to 20 g of radix astragali seu hedysari, 10 to 20 g of herba patriniae, 10 to 20 g of herba houttuyniae, 10 to 20 g of root of red-rooted salvia, 5 to 15 g of rhizoma smilacis glabrae, 4 to 15 g of radix codonopsis, 4 to 15 g of Chinese yam, 4 to 15 g of Chinese angelica, 4 to 15 g of lightyellow sophora root, 4 to 15 g of scorpions, 4 to 15 g of ground beeltle, 4 to 15 g of rhizoma corydalis, 4 to 15 g of rhizoma sparganii, 4 to 15 g of curcuma zedoary, 4 to 15 g of fructus meliae toosendan, 1 to 5 g of rhizoma zingiberis preparata and 1 to 5 g of cortex cinnamomi. The composition disclosed by the invention has the advantages that the curative effect is positive, the formula and preparation are fixed, and the composition is used conveniently, is unnecessarily increased or decreased in quantity along with symptoms and is free from known toxic and side effects; the problems of big difference of the curative effect, obvious side effect, high cost, recurrence after stopping taking the composition, non-universal applicability and no thoroughness in treatment of the existing technology are solved.

The invention discloses a human face living body detection method, which comprises the steps of obtaining coordinates of a human face frame and human face key points through human face detection, andperforming human face alignment through the coordinates of the human face key points; associating the same face IDs in the continuous video frames by using a face tracking technology; intercepting a human face from the original image, converting an RGB channel into an HSV and YCbCr space, and superposing the converted HSV and YCbCr images to obtain a superposed image; extracting Sobel features from the face region through a Sobel operator, and mapping the obtained Sobel features to an obtained Sobel feature map; respectively inputting the Sobel feature map and the overlay map of a preset framenumber of a human face ID from two input channels of a double-current neural network to obtain a living body judgment result of each frame of picture; and voting all living body judgment results of the human face ID, determining that the object is a living body when the number of frames of the living body is judged to be large, and determining that the object is a non-living body when the numberof frames of the attack is judged to be large. The method has the advantages of being high in safety coefficient, good in user experience and high in robustness.

The invention relates to a bio-based 3D printing resin and a preparation method thereof. The preparation method of the bio-based 3D printing resin comprises the following steps: (1) synthesizing a bio-based acrylate monomer by using biomass and bio-based glycidyl methacrylate as raw materials; and (2) mixing the bio-based acrylate monomer and a photoinitiator, and carrying out photocuring 3D printing to obtain the bio-based 3D printing resin. According to the bio-based 3D printing resin prepared by the method, the preparation method is green, the preparation process is simple, industrial production is easy, the obtained resin has excellent comprehensive performance and can be directly applied to 3D printing, and the method for preparing the high-performance 3D printing resin from the aliphatic biomass is created.

"Air-condition type" architecture paint assorts material which presents normal temperature reversible convension when compound of cobalt chloride and hexamethylenetetramine, a-dibenzyl acid ester compound and triarylmethlene lactone compound absorb and emit solar energy with material that the heat emissivity of vanadium oxide and tungsten oxide presents high or low reversible conversino with the environment temperature, the invention blends the above two material adequately, it adds kino, killing-material, solvent, then the producing is accomplished. The invention has huge economic benefits and social benefits; it also can greatly lessen environment contamination and green-house effect. Because the invention has broad material sources and simple manufacturing craft, its application can be easy to extend.

The invention discloses a device for measuring the metabolic characteristics of pasture livestock. The device comprises a fence, bases and lever devices, wherein vertically arranged brackets are arranged on the bases; the fence is ring-like, and fixing rings sleeving the brackets are arranged on the fence; the bottom of the fence is placed on the lever devices; the lever devices are arranged on the bases. According to the device, the defects that a conventional fixed metabolic cage method is low in applicability and is low in test precision are overcome; the influence of the grass heterogeneity, selective grazing and grazing behaviors of livestock and grass and livestock interaction on the metabolic activity of small and intermediate-sized livestock on a natural grass land is fully considered, and high-precision measurement on the metabolic characteristics of the livestock in grazing is realized.

The invention discloses a pre-service thermodynamic training process simulation method for shape memory alloy wave spring drivers. According to the method, an SMA constitutive model which considers residual deformation accumulation and material thermodynamic performance degradation under large-deformation period cyclic loading conditions is established in a layer of theory; and the model is integrated into commercial finite element software through secondary development in a layer of numerical value so as to form the pre-service thermodynamic training process simulation method for SMA wave spring drivers. Simulation prediction results can correctly describe phenomena such as phase change domain extension, residual deformation accumulation and internal stress concentration in the pre-service thermodynamic training process of the SMA wave spring drivers, and important reference can be provided for SMA components in the aspects of improving the size design accuracy and strengthening the bidirectional memory effect.

The invention provides a nano antifouling coating used for 3C electronic field, which includes, by weight, 1-2 parts of fluoro-silicone copolymerized resin, and 98-99 parts of ethyl nonafluorobutyl ether. The coating is a novel super nano antifouling coating having better antifouling effect and being more economical. Through a special coating technology, a larger processing size is allowed. In addition, the coating can be applied on different inorganic materials, such as ceramic, metal AL, MG, SUS stainless steel, etc. The technology can replace a conventional PVD process.