1210 results about "Experimental research" patented technology

A carbon dioxide drive nuclear magnetic resonance imaging detection device belongs to the technical field of petroleum engineering and technology. The detection device comprises: a simulation core device which is arranged in a nuclear magnetic resonance imaging device; an injection system which sequentially injects formation water, crude oil and supercritical carbon oxide into the simulation core device; a measurement and control system which is employed to control pressure and temperature of the whole system; the nuclear magnetic resonance imaging device which is employed to detect and perform quantitative analysis on an image to be tested to obtain voidage and permeability of a porous medium, and saturation seepage parameters of the supercritical carbon oxide, the formation water and the crude oil; and an output measuring system which is employed to measure volumes of the carbon dioxide gas, the formation water and the crude oil. The detection device has a design pressure of 0-40MPa and design temperature of 0-180 DEG C, and can simulate experimental studies of different displacement schemes of the supercritical CO2 under a complex petroleum reservoir condition; the simulation core device is made of a brass material, which produces no magnetism, satisfies requirements for high pressure and strength, has a compact structure, can be recycled, is conveniently operated, simple and applicable in an experimentation.

A comprehensive test experiment device for dynamic and static properties of a rolling bearing-main shaft system comprises a main shaft in which the front end is installed on a front end bearing support saddle; the end surface of the front end bearing support saddle is provided with three laser displacement sensor test probes; the front end bearing support saddle is internally provided with an experiment bearing; load is carried out through a radial load hydraulic tank and an axial load hydraulic tank; the back end of the main shaft is assembled on a back end bearing support saddle, and the back end bearing support saddle is configured to be paired angle contact bearings, and both an integrated monitoring ring and a pre-tightening push block are installed between the angle contact bearings to realize self-adapting pre-tightening of the bearing; the main shaft is provided with an eccentric quality shock excitation disk for applying bearing shock excitation; and the main shaft is driven by a variable-frequency electric motor. The comprehensive test experiment device for dynamic and static properties of a rolling bearing-main shaft system is used for detecting the influence on the dynamic and static properties of multiple types of bearings and the main shaft system, thereby overcoming the defect that the existing rolling bearing-main shaft experiment platform has the characteristics of single-type tested bearing, too low integration degree and rough single processing, being capable of carrying multiple experimental researches, and improving the flexibility of the rolling bearing-main shaft experiment platform.

The invention discloses a partial discharging experiment device of a structure-variable combined electrical gas-insulated apparatus and a method thereof, and belongs to the technical field of insulation online detection of electrical equipment. The partial discharging experiment device mainly comprises a GIS simulating element, a digital storage oscillograph and a signal generator, etc. By utilizing the device, the partial discharging experiment method carries out a pressurized experiment so as to collect ultrahigh frequency PD signals, carries out a signal injecting experiment, collects and corrects the ultrahigh frequency PD signals through programs, thus obtaining real waveform of the ultrahigh frequency PD signals. The device can simulate the T-shaped, L-shaped and bar-shaped structures of real GIS equipment. The method can carry out the experiment to the T-shaped, L-shaped or bar-shaped GIS structures by one to four insulated defect models, and the experiment is real, accurate and wide in range. The device and the method can be widely applied to the experimental research of the insulated state online monitoring of GIS equipments in teaching practices, scientific research institutions and equipment manufacturing plants, and the detected PD signals can be used for theoretical analysis and applied research.

A model testing method of deep rock burst includes carrying out true three shafts loading on rock burst simulation unit then applying unload at single surface, carrying out rock burst test on rock body when load is charged and discharged for realizing rock burst model test in laboratory.

The invention discloses a three-dimensional physical simulation experimental apparatus of a heterogeneous bottom-water reservoir and a saturation determining method thereof. The apparatus comprises a core holder (1), a confining pressure pump (9), a constant-pressure constant-speed displacement valve A (7), a piston container A (23), an oil-gas-water meter B (4), a back pressure device A (5), an oil-gas-water meter A (3), a back pressure device B (6), a constant-temperature tank (2), a constant-pressure constant-speed displacement valve B (8), a piston container B (24), a pressure meter A (19), a pressure meter B (21), a pressure meter C (20) and a pressure meter D (22). The apparatus is suitable for planar and vertical heterogeneous displacement experimental researches, research on influence of edge-bottom water upon displacement, and real-time analysis on oil (gas) and water saturation distribution.

The invention discloses a quasi-stable state method thermal conductivity measurement apparatus, which includes a direct-current power supply, a data acquisition processing system, two heating plates respectively connected to the direct-current power supply, four thermo-electric couples connected to the data acquisition processing system, four identical samples, seven soaking metal sheets and a measurement container stuffed with thermal insulation material. The thermal conductivity measurement apparatus is characterized in that the upper end of the measurement container is provided with a cover, screw threads are machined in the center of the cover and mounted with a bolt, the bolt presses a compressing metal plate above the heat preserving cover, to decrease the inside contact resistance. Two thin film heating plates with staggered structure are adopted, thereby heating on the samples are uniform. The soaking metal plate is provided with grooves, and the corresponding thermo-electric couples are fixed in the grooves by heat conducting glue, the soaking metal plate further uniforms the heat produced by the heating plate, and grooving on the sample is not needed during test, thereby the experimental investigation to different solid thermal conductivities can be conveniently executed.

The invention provides a simulation experiment device and a method of alternating current, direct current and impact performance of a large earth screen. The device mainly comprises a rectangular simulated slot, an earth screen model equivalently reduced, an alternating and direct current experimental power supply, an impact current generator and a precise positioning system, and is characterized in that metal grids are laid on four walls and the bottom inside the rectangular simulated slot, so as to form a mesh backflow electrode; a liquid medium is injected into the slot; the earth screen model is designed and manufactured according to the experimental objective and content; the precise positioning system comprises an electrically controlled traveling crane and a total station; and the electric potential in any position in the rectangular simulated slot is convenient to measure at a fixed point through the coordination work of the electrically controlled traveling crane and the total station. The simulation experiment device and the method can meet the experimental research on direct current, power frequency and impact grounding properties of the large earth screen, can also be extensively applied to the fields, such as the experimental research of influence on aquatic organism and metal pipelines by an alternating and direct current system and corrosive property, and the like, and have the advantages of simplicity in operation, large power capacity, durability, flexibility and diversity in refitment and the like.

A real-time, signature-free, blocker prevents buffer overflow attacks. The system and method, called SigFree, can filter out code injection buffer overflow attack packets targeting at various Internet services such as web services. Motivated by the observation that buffer overflow attacks typically contain executables whereas legitimate client requests never contain executables in most Internet services, SigFree blocks attacks by checking, without any preknowledge of the real attacks, if “executable” instruction sequences can be blindly disassembled and extracted from a packet. Being signature-free, the invention can block new and unknown buffer overflow attacks. It is immunized from almost every attack-side code obfuscation method, and transparent to the servers being protected. The approach is therefore suited to economical Internet-wide deployment with very low deployment and maintenance costs. SigFree can also handle encrypted SSL packets. An experimental study shows that SigFree can block all types of code-injection attack packets without yielding any false positives or false negatives. Moreover, SigFree causes negligible throughput degradation to normal client requests.

The invention provides an indoor experiment shaft device for synchronous or asynchronous multistage clustering fracturing of two horizontal wells and a simulation method. The device and simulation method are used for indoor experiment simulation of synchronous or asynchronous multistage clustering fracturing of two shale horizontal wells. A designed multistage clustering fracturing experiment shaft can simulate influences of the number of horizontal well fracturing segments, number of perforation clusters, perforation parameters and the like on synchronous or asynchronous fracturing fracture shapes. The experiment scheme comprises the six steps of making of an experiment scheme, machining of a special experiment shaft, machining of a test piece, preparation of fracturing fluid, an extended experiment of fracturing fractures, and CT scanning of an experiment result. The novel fracturing experiment shaft and method are provided for shale reservoir fracturing research, can simulate the joint network fracturing fracture distribution of a reservoir in multistage clustering synchronous fracturing of two horizontal wells or multistage clustering asynchronous fracturing of two wells front and back, and can provide theoretical support for shale reservoir fracturing experiment research and fracturing construction.

The invention relates to a method for simulating oil solute transport in a laboratory. The method comprises the following devices: a soil pillar fixing ring, an overflow groove, a universal quick connector, an argil plate, a permeable filter membrane, a universal adjusting pin, a sampling bottle, an air exhaust tube, a branch head, a buffer bottle, an adjustable negative-pressure pump, a data acquisition controller, a signal cable, a sampling bottle, a soil solution sampler, a transparent PVC (polyvinyl chloride) soil pillar and a soil three-parameter sensor. By controlling the change of soil water potential in the soil pillar and promoting the soil solute transport, the method realizes quick observation on the process of the soil solute transport, provides a parameter optimization means for establishing a soil solute transport model, shortens the test period, improves the test precision, ensures more scientific and reliable study results, and provides a test calibration tool for experimental study on liquidity of soil water, energy balance, migration of soil pollutants and the like.

The invention discloses a production method of an artificial experimental sample imitating a natural crack rock sample and belongs to the technical field of rock and soil mechanics experiments. According to the production method, the natural crack rock sample is subjected to 3D scanning to obtain geometric data of a crack surface, and the geometric data is processed and computer three-dimensional modeling is carried out on the basis to obtain a computer three-dimensional model of a crack surface mold. Meanwhile, the computer three-dimensional model of a pouring box matched with the size of three-dimensional modeling software is established in the three-dimensional modeling software. A 3D printing technology is used for rapidly producing real objects of the crack surface mold and the pouring box in a large batch; and finally, the artificial experimental sample used for an indoor experimental research is obtained. The production method of the artificial experimental sample imitating the natural crack rock sample, disclosed by the invention, has the characteristics of high molding quality, short production period, low production cost and no pollution and no damages on the natural crack rock sample, and can be widely applied to the production of the artificial experimental sample of indoor experiments for researching the characters of crack rock bodies.

The experiment platform includes experimental solid model of underground in 1:5 large scale, fire source system, ventilation and smoke extraction system, fire detection alarm system, experimental measurement and collection system, and data analytic system. Structure of multistory building of the solid model includes interzone tunnels, platforms, station halls and facility rooms etc. Modularized design is adopted. Fire source system can simulate different scenes of fire, and generate hot smoke gas of fire nigh true. Power and fuming quantity of the fire source system is determined based on theoretical analysis from model similitude. The experiment platform can generate growth curve of different power of fire. The experiment platform is in use for carrying out experimental studies: happening and growing mechanism of fire, and poison gas outspread inside stations of underground as well as control technique. The invention is applicable to different structures of station.

A loach fish fry artificial cultivation method is characterized by comprising spawning and hatching process, 7-day (d) fish fries cultivation and 15 d fish fries cultivation, wherein the spawning and hatching process comprises the following steps: parent fish rearing and selecting; artificial induction; fertilization process; and fertilized egg hatching process. A loach fish fry reinforced cultivation method comprises the following steps: adopting indoor flat surface slot to cultivate the 7 d fish fries and the 15 d fish fries, reinforced culturing fish fries, stocking loach fish fries to a pond after the 7 d fish loach fish fries and the 15 d fish fries grow up, and thereby greatly improving fish fry indoor cultivating survival rate and fish dries pond descending survival rate. A result of an experimental research shows that: the indoor cultivating survival rate of the 7 d fish fries reaches up to 87.8 percents, the pond descending survival rate reaches up to more than 30 percents, the 15 d fish fries reaches up to 92.6 percents, and the pond descending survival rate reaches up to more than 50 percents. The loach fish fry artificial cultivation method is scientific and rational, easy to implement, and good in practicability. By using loach fish fry artificial cultivation method, the fish dries pond descending survival rate can be greatly improved, and good economic benefit can be obtained.

A device is described based on flexible photonic crystal, which is comprised of a periodic array of high index dielectric material embedded in a flexible polymer. Dynamic, real time tunability is achieved by the application of a variable force with a MEMS actuator or other means. The force induces changes in the crystal structure of the photonic crystal, and consequently modifies the photonic band structure. The concept was demonstrated by a theoretical investigation on the effect of mechanical stress on the anomalous refraction behavior of the flexible PC, and a very wide tunability in beam propagation direction was observed. Experimental studies on fabrication and characterizations of the flexible photonic crystal structures were also carried out. High quality flexible PC structures were fabricated by e-beam lithography and anisotropic etching processes.

The invention relates to the microbiology and molecular biology technical field, in particular to a method for extracting pig manure sample total DNA. The method mainly comprises manure sample pretreatment and sample total DNA extraction. Moreover, the method comprises the following steps that: collected fresh manure sample or frozen manure sample is taken as a material; the pretreatment of the manure sample is carried out by means of a PBS buffer solution, a paraformaldehyde solution and anhydrous alcohol so as to obtain manure sample bacteria suspension; and a CTAB solution and beta-mercaptoethanol, etc. are used to carry out cell fragmentation, thereby releasing DNA. The method has the characteristics of simple operation, quickness, high efficiency and ideal repeatability and economical efficiency, etc.; moreover, the extracted DNA has high concentration, purity and yield, and can be directly used in subsequent molecular biology experimental researches such as PCR amplification without purification.

The invention discloses an intelligent car and a positioning method used for an intelligent transportation physical simulation platform. Different from a radio frequency identification method in application to an electronic license plate, the positioning method includes the steps that a card reader is arranged inside the car when the intelligent car is positioned and navigated, passive electronic labels are laid on the road surface, and each passive electronic label corresponds to coordinates in a global coordinate system; when the intelligent car passes above the passive electronic labels, the card reader identifies UIDs of the passive electronic labels, and pose information corresponding to the UIDs is determined and used for correcting the position of a miniature inertia navigation system. The simulation platform can be used for experiment research and simulation display on intelligent vehicle coordination in a vehicle-vehicle and vehicle-road network environments, and uses an embedded system carried on the intelligent car for processing positioning information and then directly controlling the car, and therefore communication time is shortened.

The invention relates to magnetic resonance elastography detection system and method thereof. The detection system comprises a high-field nuclear magnetic resonance whole body imaging system which can carry out liver imaging, and a shear wave excitation device. The detection method comprises the following steps of: (1) inner particle displacement on a phantom or a detected part; (2) magnetic resonance elastography forming; and (3) fibration classification. For preliminary experiments on the phantom as well as studies on background phase noise and experiment researches on the relationship between shear wave transmission and shear wave frequency, the invention has good image quality and obvious effect. The invention establishes a foundation for subsequent MRE researches on the liver tissue, and provides directions and references for elastic researches on other parts.

The invention relates to a coalbed gas dynamic effect simulation system. The system comprises a gas injection system, a sample loading system, a compaction system and an information acquisition system; the sample loading system comprises a high pressure cylinder body which is provided with a plurality of information sensors, one end of the high pressure cylinder body is provided with an exhaust valve and the other end is a sealed pressure plunger; a hydraulic oil chamber is arranged in the hydraulic plunger, a gas inlet tube penetrating the plunger is arranged at the middle part of the hydraulic plunger, and the gas inlet tube penetrates the other end cover; the gas injection system consists of a high pressure bottle, a relief valve, a tube valve fitting and the like, ,and supplies gas to the gas inlet tube; the compaction system comprises a hydraulic pumping station which injects oil to the hydraulic oil chamber arranged in the hydraulic plunger and provides oil pressure; and the data acquisition of the sample loading, compaction and gas injection processes is controlled by an information acquisition control system. The simulation system can reproduce migration and outburst processes of the coalbed gas, reproduce stress concentration and stress relief processes of coal rock, and can be applied to other related physical effect experimental studies.

The invention discloses an one-dimensional lamination crack drawing test method based on the Hopkinson principle, Advantages: because the incident rod and the rod shaped test piece completely or approximately satisfies the impedance match condition, the one-dimensional lamination crack drawing test of large size test piece can be performed based on the Hopkinson compressed rod; in the polyphase brittle material (such as concrete) impact characteristic experiment research field, the method can be applied for the dynamic experiment and research to the concrete containing large sized aggregate accordance with engineering reality, in order to cause the test result to have macroscopic validity; and the length of the rod shape test piece satisfies the condition: Ls=2L(impact rod)C(impact rod)Cs, the lamination drawing crack approximately occurs in the middle of the test piece, thereby, the stress adequation on the section of the test piece is ensured.

Using single circular ring type static sensor, the invention implement measures average velocity of grains, simplifies measuring device, and reducing dependence of flow condition between two phases of gas and solid. Belonging to non-contact type, the static sensor does not influence on flow condition of liquid in structure. Based on spatial filtering method of static sensor, the technique for measuring average velocity of grains possesses features of simple structure, convenience of processing signal, low cost, and high measuring accuracy. The invention is applicable to site environment of inclement industrial pneumatic transport. The invention carries out experimental study systematically on experimental installation of gravity handling grain flow, and compressive dense phase pneumatic transport system. The result indicates that the measuring system possesses good repeatability and stability.

The invention discloses lenalidomide composition tablets and a preparation method thereof. The tablets comprise components in percentage by weight as follows: 10%-18% of lenalidomide crystals, 28%-40% of lactose, 28%-40% of microcrystalline cellulose, 1%-5% of konjac glucomannan, 10%-15% of beta-cyclodextrin, 5%-10% of sodium carboxymethyl starch, 0.5%-1.5% of sodium stearyl fumarate and 0.5%-1.5% of powdered cellulose. The preparation technology of the lenalidomide composition tablets is stable, simple and easy to operate, technological parameters are reliable, and the production cycle is shorter; experimental research shows that the lenalidomide raw material is stable in crystal form, higher in purity and capable of meeting the quality requirement of final products; the synthesis technology is concise, stable, feasible and applicable to mass production; the quality is controllable, the stability is better, and the lenalidomide raw material is unchanged under conditions of affecting factors such as the high temperature, high humidity and 10 days of illumination and is stable after being stored for 6 months under the acceleration condition.

The invention relates to a device for fixing the end part of a riser model in a deep-sea slender flexible riser vortex-induced vibration test, which comprises a trailer, a left support device, a right support device, a sliding mechanism, a fixed pulley and a tension system, wherein two ends of the trailer are arranged on a track, and other parts are suspended; the left support device is an integrated structure formed by welding three steel plates and transversely fixedly arranged at the left end of the suspended part on the trailer; the right support device is longitudinally fixedly arranged at the right end of the suspended part on the trailer; the sliding mechanism comprises a base which is fixedly connected with the bottom part of the left support device, two parallel sliding tracks are arranged on the base, and a sliding block is arranged on the two sliding tracks by penetration; the riser model is arranged between the sliding block and the right support device; the fixed pulley which can rotate around a shaft is arranged on the outer side of the steel plate at the bottom part of the left support device; and the tension system comprises a tensiometer, a tensioner and a spring which are connected on the steel plate on the outer side of the left support device in series, and the sliding block is connected with the spring by bypassing the fixed pulley through a steel wire rope. The device is firm and stable, can truly and effectively simulate the riser vortex-induced vibration characteristics in a laboratory and is mainly applied in the field of indoor model test researches of deep-sea slender flexible riser structure vortex-induced vibration.

The invention discloses a die design-and-produce system, based on KBE and WEB techniques, comprising a program storage digit computer server and a plurality of terminals connected with the server, wherein the server comprises a die design-and-produce knowledge system module, a CAD design module, a die CAE analyzing module, a CAM processing module and a die 3D check module. The invention researches, collects and finishes advanced die design technique, advanced die processing technique, die check technique, and die mould reuse technique, builds a basic frame of the knowledge platform, and processes some experiments on the die knowledge, researches the knowledge obtain, classify and present technique, uses computer program to build a knowledge system project integrated with design, produce, check an reuse, to obtain an cooperated hardware-software platform integrated with knowledge system, design, produce and check.