34results about How to "Broad application value" patented technology

A magnetically controlled welding method with consumable electrode features that a pair of exciting coils for upper and lower electrodes are arranged respectively above and under the workpiece to be welded, and an exciting power supply is used to provide the exciting current to said coils and generate an external vertical magnetic field for controlling and perform the welding to the workpiece protected by active gas or CO2. Its welding apparatus has exciting power supply, exciting unit and water cooling system.

The invention relates to a method for detecting and tracking a small and weak target of an infrared sequence image under complex sky background, which comprises the following steps of: (1) adopting a self-adaptive background eliminating algorithm which combines with the small and weak target characteristic of an image and Top-hat conversion for conducting self-adaptive background elimination and inhibiting the influence of complex background and part of noise on the small and weak target detection; (2) using an iterative threshold algorithm which is suitable for a dim-background image for dividing the possible target area in the dim-background image after background elimination; (3) constructing a dilation accumulation algorithm according to the motion law of the target in a plurality of continuous frames, and distinguishing possible false-alarm target areas; (4) using CB algorithm and logic and operation based on contour structure elements for inhibiting the false-alarm targets; (5) taking the areas in which the false-alarm targets are inhibited as possible target area which is then compared with the track prediction result in the step (7) so as to realize the updating of track; (6) conducting track judgment; and (7) conducting track prediction.

The invention relates to a flexural fatigue mode adjustable tester for testing mechanical properties of materials, and a testing method thereof, belonging to the field of precision instruments. The tester comprises a flexural fatigue loading unit, a test piece clamping unit, an associated movement unit and a precise detection unit, wherein the flexural fatigue loading unit is powered by a direct current servo motor, a crank and rocker mechanism is driven to realize reciprocating swinging of a rocker by primary worm gear reduction, the rocker drives the clamping unit to realize reciprocating rotation, a bended test sample is repeatedly bent along with the reciprocating rotation of the clamping unit, and the associated movement unit does associated rotation and translation under the driving of the bended test sample. The tester has the advantages that the error of converting bending moment in three-point bending loading is avoided, the influence of the friction force of a support roller on the testing result is avoided, the bending moment and the bending angle can be accurately measured, different fatigue modes can be realized, and fatigue testing with different stress amplitudes and different average stresses can be realized.

The invention discloses a large-dielectric-anisotropy high-optical-anisotropy liquid crystal composition and a preparation method and the application thereof. The liquid crystal composition comprises a component I and a component II, wherein the component I is optionally a component a, a component b, a component c or a component d, the component a comprises at least one substance shown in a formula I and a formula II, the component b comprises at least one substance shown in the formula I and a formula III, the component c comprises at least one substance shown in the formula II and the formula III, and the component d comprises at least one substance shown in the formula I, the formula II and the formula III. Triphenyl diyne type substances with bigger optical anisotropic values are used, so that proportion of large dielectric anisotropic monomers is increased while high optical anisotropy is maintained, quick response is realized, and the large-dielectric-anisotropy high-optical-anisotropy liquid crystal composition has wide application prospect and value under various liquid display modes, especially in aspects of blue-phase liquid crystal display, cholesteric-phase liquid crystal display, polymer dispersed liquid crystal display and polymer network liquid crystal display. The formula I, the formula II and the formula III are shown as follows.

The invention discloses a cervical cell image classification method based on a graph convolutional neural network. Firstly, a cervix uteri cell image is prepared as a training sample; 1024-dimensionalfeature representation of a sample is acquired, a sample feature relation graph is constructed, a deep network based on a graph convolutional network is constructed, the sample and the sample featurerelation graph are sent to the deep network model for training, training is stopped after iteration is performed for a certain number of times, and network weight parameters are stored. When the method is used, a target image is segmented into a to-be-predicted area with cell nucleuses, then weight parameters and a network structure obtained through training are loaded, the to-be-predicted area is input into the to-be-predicted area, and a classification result can be obtained through calculation. According to the method, the cervical cell diagnosis accuracy and efficiency are improved, the diagnosis process of a pathologist is optimized, and the workload of the pathologist is reduced.

The invention relates to the field of soil remediation, in particular to a compound chemical leaching method for efficient remediation of heavy metal contaminated soil. Natural organic acid and iron salt are used as main raw materials to prepare a compound leacheate, and the technical problems that an existing soil remediation eluent is high in cost and low in efficiency and can cause secondary pollution easily are solved. According to the compound chemical leaching method, the heavy metal contaminated soil is remediated, the heavy metal content in the soil can be reduced quickly, and a good remediation effect is achieved. Waste liquid generated after leaching is disposed through a regenerant, and the primary regeneration efficiency can reach 80% or over.

The invention discloses a specific primer for assaying genetically modified corn MIR162, the sequence of which is shown as SEQ ID NO:1 and SEQ ID NO:2. The invention also discloses a fluorescently labeled probe for assaying genetically modified corn MIR162, the sequence of which is shown as SEQ ID NO:3, the 5' end of the probe is connected with a fluorescent reporter FAM, and the 3' end of the probe is connected with a fluorescent quencher Eclipse. The invention also discloses an assay method which utilizes the primer and the probe to carry out gene-specific qualitative PCR (Polymerase Chain Reaction), SYBR Green I real-time fluorogenic quantitative PCR and TaqMan probe real-time fluorogenic quantitative PCR to assay whether corn and related products thereof contain MIR162 transformation events, and an experiment proves that the assay method is sensitive, accurate, simple and reliable, and has a high application value and a wide market prospect.

The invention initially provides a preparation method of a forging mold by using a composite build-up welding and spray welding method, combined with the characteristics of the build-up welding and the spray welding, and aiming at the status quo of the traditional forging mold manufacturing technology in China at present. The method comprises the following steps of: a. forging a forging mold substrate and carrying out thermal refining, wherein an allowance is reserved at a substrate cavity; b. build-up welding uniformly distributed build-up welding transition layers on a specific cavity surface by using an automatic gas shield build-up welding technique; c. forming a surface reinforcement layer on the surface of the transition layer by using a one-step spray welding method; d. finishing the spray welding and carrying out the remelting and warming at once by using a tempering and slow cooling technique; and e. fine finishing, and putting the size of each part of the cavity in place. Compared with the traditional preparation method of the forging molds, the production cost is reduced, the condemnation factor of a product is decreased, meanwhile, the joint strength of the mold substrate and a welding layer is enhanced, the strength and the impact toughness of the mold are improved, the wear-resisting and the thermal fatigue resistance properties of a surface layer are optimized, and the property of the mold surpasses that of the new-made integral molds of 5CrNiMo and 5CrMnMo.

The invention relates to a particle swarm and fuzzy means clustering based cell image segmentation method. On the basis of an intuitive fuzzy means clustering theory, an intuitive fuzzy membership degree form is improved aiming at cell images and combined with fractional order particle swarms to realize alternate optimization, and a morphological method is adopted for result improvement to realize accurate segmentation of the cell images. The method includes steps: firstly, selecting appropriate parameters, initial particle swarms and relevant data; secondly, starting alternate iterative optimization of the fractional order particle swarms and intuitive fuzzy clustering; thirdly, comparing results with standard fuzzy means clustering results, and selecting a morphological processing method through differential images; finally, subjecting result images to range conversion and watershed segmentation to obtain a final result. The particle swarm and fuzzy means clustering based cell image segmentation method can be widely applied to various cell image based application systems and has a promising market prospect and a high application value.

The invention discloses a marine bacteria chromogenic isolation medium and application thereof. The formula of the marine bacteria chromogenic isolation medium comprises the following compositions: 2 to 3g/L of peptone, 0.1 to 1g/L of yeast cream, 8 to 20 g/L of lactose, 8 to 20 g/L of sucrose, 8 to 20 g/L of cellobiose, 0.1 to 1 g/L of sodium thiosulfate, 0.1 to 1 g/L of ammonium ferric citrate, 0.01 to 0.1 g/L of 3-amino-7-dimethylamino-2-methylphenazine hydrochloride and 10 to 20 g/L of agaragar. The marine bacteria chromogenic isolation medium can make bacteria growing positions have different colors, is convenient to detect or separate marine bacteria quickly and simply, and facilitates marine microorganism diversity study.

The invention belongs to the technical field of residential building entity full life cycle prediction, and discloses a residential building entity full life cycle analysis method based on the Internet and BIM. The method includes: establishing an analysis method for a digital building concept; analyzing influence factors of the entity project in each stage from the perspective of full-factor and whole-process analog simulation; by establishing an application method of an entity project and comparing the application method with a technical result, obtaining key influence factors of the Internet + BIM technology in the development of the building industry and the value of the entity project using the BIM technology, and obtaining a reference scheme of the development of the entity project and engineering application. By establishing the application method of the entity project and comparing the application method with the technical result, the key influence factors of the Internet + BIM technology in the development of the construction industry and the value of the entity project using the BIM technology are obtained, and the reference scheme of the development of the entity project and the engineering application is obtained.

The invention relates to an infrared dim small target detection method based on first-order partial derivatives in multiple directions. The method comprises three steps: first, using a facet model to construct a binary cubic function of image grayscale in a small range, solving the first-order partial derivative in each direction in a center region, and designing a convolution template of required coefficients, wherein the operation coefficients can be obtained directly from a convolved image; then, designing an enhanced convolution template through the principle of maximum inner product according to the characteristics of the first-order partial derivative of a small target in each direction to enhance the target in each direction; and finally, fusing the results in all directions by means of multiplication, and suppressing the background as much as possible while further enhancing the target, thus getting a final result. The method can be widely used in dim small target detection of infrared images, and has a broad market prospect and application value.

The invention relates to a parallel boat type device for intercepting and recycling floating oil. The device for intercepting and recycling the floating oil comprises traction boats, a piece of assembled type intercepting waterproof cloth, water pumps, water pipes and oil-water separation buckets. In the working process, two boats sail on the water surface in parallel and a V shape is formed between the two boats by the assembled type intercepting waterproof cloth which vertically floats on the water surface; the floating oil between the two boats is gathered at the bottom of the V shape due to the stopping and the guiding of boat bodies and the intercepting device, and the gathered floating oil has a certain thickness, so that the oil and the water can be pumped into the separation buckets on the boats through the water pumps. A valve is respectively installed each of the upper part and the lower part of each separation bucket; since the oil is lighter than the water and is not dissolved in the water, the oil and the water can be separated into two layers in the buckets, the water can be directly discharged out of the boats through the valves at the lower parts and the recycled oil can enter oil tanks through the valves at the upper parts. Each unit of the assembled type intercepting waterproof cloth is composed of an inflation rod, a piece of waterproof cloth, a zip fastener, a snap fastener and a lead weight and the assembled type intercepting waterproof cloth can be composed of different quantities of the units as required.

The invention relates to a preparation method of a bionic inspired polyurethane elastomer with super toughness, super stretching, self-repairing and high resilience, and the raw materials comprise polytetrahydrofuran, 1, 6-hexamethylene diisocyanate, acetyl butyrolactone, guanidine carbonate, 2, 6-diaminopyridine, anhydrous ferric trichloride and the like. The preparation method comprises the following steps: 1) synthesizing a multiple hydrogen bond monomer; and 2) preparing an elastomer containing multiple hydrogen bonds and metal complex bonds. the polyurethane elastomer has the advantages that a network of the polyurethane elastomer contains a large number of multiple hydrogen bonds and metal complex bonds, so that the elastomer has excellent mechanical properties, namely super toughness and super stretching. The dynamic reversibility of the non-covalent bond endows the elastomer with self-repairability. The elastomer is simple in preparation method and rich in raw materials, and compared with a traditional polyurethane elastomer, the elastomer has controllable toughness and stretchability, excellent self-repairability and high rebound resilience and has potential application value in the fields of wearable materials, sealing gaskets, hot melt adhesives and the like.

The invention discloses a carbon nanotube fiber-ionic gel artificial muscle and an electrodeformation test method thereof, and belongs to the technical field of electrochemical actuation performance test. The artificial muscle is mainly prepared from carbon nanotube fibers and ionic gel under certain conditions. According to the invention, two electrodes of the artificial muscle are electrified through a power supply, and a displacement sensor and a data collection box are used for measuring the electrodeformation shrinkage amount of electrified fiber; by adding graphene, the conductivity of the artificial muscle is increased, so that the electric actuating performance is improved; salt with moisture retention capacity is dissolved in the gel, and the gel is coated with an elastomer layerwith water retention capacity, so that the service life of the artificial muscle is prolonged, and the artificial muscle is driven in a gas or liquid environment compared with carbon nanotube fibers;and the artificial muscle has the advantages of being high in conductivity, high in energy conversion efficiency, excellent in mechanical property, wider in application environment and the like, and has wide application in the fields of medical treatment and public health, industrial product manufacturing, robot research and development and the like.

A preparation method of a nitrogen and sulfur co-doped tungsten disulfide sodium ion battery negative electrode material comprises the steps of adding tungsten hexachloride into ethyl alcohol for magnetic stirring until the tungsten hexachloride is completely dissolved to form a clear solution, adding thioacetamide, melamine and trithiocyanuric acid, and performing homogeneous reaction for 4-48 hours at 200-240 DEG C to obtain black powder; and performing calcination on the black powder under protection of an argon atmosphere to obtain the nitrogen and sulfur co-doped tungsten disulfide sodiumion battery negative electrode material. The tungsten hexachloride, the thioacetamide and a carbon fabric are used as raw materials, and the nitrogen and sulfur co-doped WS2 electrdoe material is successfully prepared by methods such as assisted solvent thermal and thermal treatment of the melamine and the trithiocyanuric acid. The preparation method is simple in operation process, and the reaction temperature is also easy to control. More active sites are provided for the electrode materials by nitrogen and sulfur co-doping, ion and electron transmission is facilitated, so that the electrochemical performance of the battery is improved.

The invention relates to a linear feature extraction method utilizing multi-scale multi-constructing-element top-hat transformation. The linear feature extraction method includes the steps of firstly, in consideration of characteristics of linear features of images, constructing multi-scale multiple constructing elements which are required by top-hat transformation and used for linear feature extraction; secondly, by means of top-hat transformation, extracting the possible linear feature in every direction under every scale respectively through the constructed constructing elements; thirdly, merging the linear features in every direction under every scale; fourthly, taking the maximum of the linear features under all scales as an extracted linear feature grey scale image; and finally obtaining the final results through follow-up processes of binaryzation, artifact reduction, thinning and small region elimination. The extracted linear features are important features for image processing related applications. Therefore, the linear feature extraction method can be widely applied to various application systems based on image processing and has broad market prospects and application value.

The invention relates to a preparation method of a tungsten disulfide/CFC@C multiphase composite electrode material. The preparation method comprises the steps of adding tungsten hexachloride in alcohol, mixing uniformly and then adding thioacetamide, so as to obtain a mixed solution, soaking activated carbon cloth in the mixed solution, performing homogenous reaction so as to obtain a WS2/CFC composite material; adding maltose and PVP to deionized water, mixing uniformly, so as to obtain a transparent solution; putting the WS2/CFC composite material in the transparent solution, performing ultrasonic reaction and then homogeneous reaction, so as to obtain the tungsten disulfide/CFC@C multiphase composite electrode material. According to the preparation method disclosed by the invention, the tungsten disulfide is grown on a carbon cloth substrate and then is wrapped, so that the tungsten disulfide as sodium ion battery anode material does not expand in charging and discharging and is more stable in structure, and electrochemical stability of batteries is improved. Through adoption of the preparation method, the multiphase composite material is prepared through a hydrothermal method;the process is simple; the cost of raw materials is low; the reaction temperature is easy to control; the reaction time is short.

The invention discloses a silicon-based plasma ultra wideband terahertz wave absorber. The terahertz wave absorber comprises basic units arranged in a periodic array, wherein the front of each basic unit is square and is provided with a hollow rectangular pyramid; the basic units are seamlessly connected; and the material of the terahertz wave absorber is a phosphorus-doped n-type silicon wafer or other semiconductor materials. According to the silicon-based plasma ultra wideband terahertz wave absorber provided by the invention, through a hollow structural design, a wideband plasma resonance effect is generated, so that the absorption rate is strengthened; and meanwhile, the relative bandwidth is greatly improved, the technological process is simplified, and the manufacturing cost is reduced.

The invention discloses a pre-sodium-modified sodium ion battery positive electrode material, and a pre-sodium-modified method and application thereof. The method comprises the following step: in an inert atmosphere, reacting a sodium-ion battery positive electrode with an aryl sodium-modification reagent solution to obtain a pre-sodium-modified sodium-ion battery positive electrode wherein the aryl sodium modification reagent is one or more of biphenyl sodium, naphthalene sodium, pyrene sodium, anthracene sodium or phenanthrene sodium. A sodium-rich or over-sodium-rich positive electrode is obtained by reacting the positive electrode of the sodium-ion battery with the solution of the aryl sodium modification reagent, the half-battery first-cycle charge specific capacity is obviously improved and is matched with the efficiency of a negative electrode, the first-cycle discharge specific capacity after the whole battery is prepared reaches the theoretical specific capacity of the positive electrode, and the energy density reaches 300Wh/kg; and the method substantially improves the energy density and the cycle life of the battery, has the advantages of wide research prospect and application value, mild reaction conditions, good safety, good stability of the obtained battery, and industrial popularization and application prospect.

The invention belongs to the technical field of titanium alloy metallographic structure observation, and particularly relates to a corrosion method for clearly displaying a metallographic structure of a cold-rolled alpha+beta type titanium alloy pipe. The technical problem to be solved by the invention is to provide the corrosion method for clearly displaying the metallographic structure of the cold-rolled alpha+beta type titanium alloy pipe. The method comprises the following steps of: a, adding hydrofluoric acid and water into a beaker, adding ammonium bifluoride, performing stirring until the ammonium bifluoride is completely dissolved, and conducting standing to obtain a solution A; b, adding concentrated nitric acid and concentrated sulfuric acid into the solution A, and sequentially adding oxalic acid and methanol to obtain a solution B; and c, soaking a ground and polished metallographic specimen into the solution B, conducting corroding, taking out the specimen, performing washing with clear water, and conducting blow-drying. By the adoption of the method, the corrosion effect of the metallographic structure of the cold-rolled titanium alloy pipe can be improved, the alpha+beta phase structure of the cold-rolled TC titanium alloy can be displayed more clearly, structure observation and subsequent phase identification are facilitated, and a positive effect is brought to detection work.

The invention provides a method for classifying an invariant moment of similar objects by multi-scale mathematical morphology. The method comprises the following basic flow: firstly, extracting detailed characteristics of an object training image by the multi-scale mathematical morphology; performing various combinations on multi-scale detailed characteristics of an object to form real different parts of similar objects in different types on multiple scales; secondly, calculating values of invariant moments of the real different parts by selecting an arbitrary invariant moment method; thirdly, evaluating the values of the invariant moments of the real different parts through one measurement, and automatically selecting the real different parts which can effectively differentiate the similar objects and the corresponding invariant moment thereof; and finally, classifying the similar objects by the selected real different parts and the corresponding invariant moment thereof. The method can realize effective classification on the similar objects, can be widely applied to various target identification and classification systems, and has wide market prospect and application value in the field of digital image processing and pattern recognition.

The invention relates to a modulation ratio control method based on voltage closed loop of a flywheel energy storage asynchronous generator. The modulation ratio control method comprises the steps of comparing a direct current bus voltage given value with an actually detected feedback value, and obtaining a modulation ratio given value after the comparison result passes through a PI controller and an amplitude limiting module; meanwhile, giving the stator frequency; calculating and obtaining a carrier wave ratio through a flywheel speed reduction curve and an f/fc unit (as shown in the specification); then calculating the turn-on time of a switch tube according to the modulation ratio and the carrier wave ratio to generate an SPWM wave for controlling on and off of a power converter power module so as to further control the frequency of a high-speed asynchronous motor stator dragged by the flywheel to enable the frequency to be lower than the rotating speed of the flywheel constantly; and enabling the motor to be an energy feedback state so as to convert the mechanical energy stored by the flywheel into electric energy to realize power generation. According to the method, the modulation ratio is taken as the main control quantity; the stable output of the power generation voltage can be realized, and the rotor position information is not required to be detected; and meanwhile, the control algorithm is simple and easy to implement.

The invention discloses a primer and a method for detecting a transgenic maize strain MIR162. The primer consists of a forward primer 193F and a reverse primer 751R, wherein the nucleotide sequence of the forward primer 193F is shown as SEQ ID No:1, and the nucleotide sequence of the reverse primer 751R is shown as SEQ ID No:2. The invention also discloses a kit comprising the primer. The detection method has the characteristics of high specificity, rapidness, simplicity, convenience, high accuracy and high sensitivity, has high actual application value in management and inspection and quarantine of transgenic products and is particularly suitable for popularization and application in local laboratories.

The invention provides a self-assembled hollow tubular tungsten disulfide nano material as well as a preparation method and application thereof, and the preparation method comprises the following steps: step 1, adding tungsten hexachloride and thioacetamide into ethanol, and stirring the raw materials until tungsten hexachloride and thioacetamide are completely dissolved to form a suspension A; 2,adding glucose and PVP into the suspension A, and stirring the raw materials until glucose and PVP are completely dissolved to obtain a solution B; 3, carrying out solvothermal reaction on the solution B at the reaction temperature of 200-240 DEG C, and cooling the reaction product after the reaction is finished; step 4, washing and drying a product of the solvothermal reaction to obtain a driedsample; and 5, carrying out annealing treatment on the dried sample at the calcination temperature of 400-600 DEG C to obtain the hollow tubular tungsten disulfide nano material. The hollow tubular tungsten disulfide nano material is prepared by using a one-step solvothermal method, and the volume expansion of the hollow tubular tungsten disulfide nano material in the charging and discharging process can be greatly relieved due to the unique self-assembled hollow tubular structure, so that the structural stability is effectively maintained.

The invention discloses a special balanced nutrition fertilizer for cultivation of millet. The provided balanced nutrition fertilizer comprises the ingredients of KNO3, KH2PO4 or Ca(H2PO4)2.H2O, KCl,MgSO4.7H2O or MgSO4.H2O, Ca(NO3)2.4H2O or 5Ca(NO3)2NH4NO3.10H2O, and FeSO4.7H2O. The experiment result shows that: compared with the current conventional fertilizing methods of farmers (compound fertilizers, urea, ammonium sulfate, potassium chloride and potassium sulphate), the yield per mu of the millet is increased by 1-8%, a use method is simple and convenient, the plant grows robustly and canresist diseases and insect pests, the use level of the pesticide is reduced, the pesticide and manpower costs are lowered, meanwhile, the quality and the taste of the millet are improved, the original flavors of the different millet varieties are recovered, and meanwhile, the storage endurance of the millet is also improved.

A sol-gel method for preparing an Sm2O3 nanoarray comprises the following steps: adding Sm (NO3) 3.6H2O into deionized water to prepare a transparent solution; regulating the pH value of the transparent solution to 4.5-7.0, and adding an aqueous solution of polyvinyl alcohol; sufficiently soaking an AAO template with sol, bonding with a cleaned ITO (indium tin oxide) conductive glass substrate, and drying in a high-temperature drying oven to slowly dehydrate the sol into gel, performing heat treatment, and cooling in the oven; and grinding the surface of the AAO template by using sandpaper, washing with deionized water, etching by using a NAOH solution to remove the template, and washing with deionized water and ethanol to obtain the Sm2O3 nanoarray on the surface of the ITO conductive glass substrate. The Sm2O3 nanoarray is prepared by a sol-gel hard template assistive technology, so that the sol-gel method for preparing the Sm2O3 nanoarray is simple in process equipment and easy to operate; by the sol-gel method for preparing the Sm2O3 nanoarray, the nanoarray with a controllable size, a controllable structure and a high binding force can be prepared; the prepared Sm2O3 nanoarray has wide research and application values in nanoscale optical-electronic devices and other aspects.

The invention discloses a power source for supplying power to a double-mainboard computer. The structure of the power source consists of computer power supplies, two computer main boards, two field-effect transistors (Q1 and Q2), and power controllers. The computer power supplies are serially connected with the field-effect transistors (Q1 and Q2) and used for supplying power to the computer main boards; the communication or closing of each of filed-effect transistors is controlled by the power controller; the connection manner for each pin of the field-effect transistors (Q1 and Q2) is that source electrodes (S) of the Q1 and the Q2 are in parallel connection with the computer power supply, drain electrodes (D) are respectively connected with the main board 1 and the main board 2, and grid electrodes (G) are respectively connected with the power controller 1 and the power controller 2. Compared with the prior art, the art adopted by invention is characterized in that the double-mainboard system has higher performance, and two sets of systems can back up each other and mutually tolerate faults so that the important data can not be lost and the key business can not be interrupted even though one set of system is broken. Therefore, the double-mainboard system possesses the widespread market development prospect and the application value.

The invention discloses a method for calculating residual bending moment ultimate loads of damaged pipelines under a combined load action. The method is used for respectively calculating bending moment ultimate loads of damaged pipelines according to four conditions that all the flaws of the damaged pipelines fall in a compressive region, most of the defects all in the compressive region and a small part of the defects fall in a tensile region, all the defects fall in the tensile region, and most of the defects fall in the tensile region and a small part of the defects fall in the compressiveregion. The method is capable of carrying out correct assessment and calculation to obtain bending moment ultimate load calculation results so as to improve the calculation precision, and has a relatively wide application value in the field of damaged pipeline safety assessment.

The invention discloses application of ferula asafoetida sesquiterpene lactone in preparation of an anti-schistosomiasis drug, wherein the concentration of the ferula asafoetida sesquiterpene lactone is 10-100 mg/mL; and schistosoma japonicum is schistosoma japonicum. It is verified for the first time that the ferula asafoetida sesquiterpene lactone derived from ferula asafoetida has the effect of killing adults and juvenile insects of the schistosoma japonicum in vivo and in vitro; the highest insect reduction rate in vivo can reach 61.26%; furthermore, the female reduction effect is obvious; meanwhile, the ferula asafoetida sesquiterpene lactone further has the effect of efficiently killing eggs of the schistosoma japonicum in vivo; that is, the ferula asafoetida sesquiterpene lactone has a remarkable killing effect on different development stages of the schistosoma japonicum, so that the ferula asafoetida sesquiterpene lactone can be prepared into the anti-schistosomiasis drug; an important theoretical basis is provided for developing a novel schistosomiasis prevention and control drug; and the ferula asafoetida sesquiterpene lactone has wide market application prospect and application value.