324results about How to "Less stringent requirements" patented technology

The invention discloses a multi-field coupling true triaxial test system and an experiment method implemented by the same. The multi-field coupling true triaxial test system is characterized by comprising a true triaxial double-cavity pressure chamber (1), an axial loading system (2), a confining pressure/back pressure loading system (3), a temperature control system (4), a permeation control system (5), a gas loading system (6), a bending element experiment system (7) and a computer (8). The multi-field coupling true triaxial test system and the experiment method have the advantages that stress fields and seepage fields are controlled, and accordingly simulation research can be carried out on seepage anisotropy of rock and soil mass; influence of environmental factors on freezing nucleusor frozen soil samples can be simulated under the effects of temperature fields, the seepage fields and the stress fields; research can be carried out on the physical and mechanical properties of unsaturated frozen soil under the effects of the temperature fields and the stress fields; simulation research can be carried out on change of the physical and earth properties of sediments in generationand decomposition procedures of natural hydrates under multi-field coupling conditions, and simulation research can be carried out on mutual displacement effects between hydrate gas in the sediments and underground water; simulation research can be carried out on the physical and mechanical properties of unsaturated soil under the multi-field coupling conditions.

The invention discloses an integrated pin tool used for friction stir welding and a composite method of resistance-friction stir welding thereof. The pin tool comprises a pin tool body arranged on a friction welder and a tool pin arranged at the lower part of the tool pin body which is connected with the welder in a clamping and insulating manner; the pin tool also comprises a forced cooling system, a current carrying system, a gas shielding system, a temperature sensing and detecting system, a sealing and insulation system, an inner shaft shoulder and the tool pin, and is an integrated pin tool which has the functions of gas shielding, forced circulation cooling of internal liquid medium, automatic temperature sensing and detection, tool pin changing and composite non-keyhole resistance-friction stir welding. The invention overcomes the difficulty of friction stir welding of the high melting point metal and meets the harsh technical requirements of the friction stir welding of the low melting point metal, improves the quality of welding joints, prolongs the service life of the pin tool and realizes the friction stir welding of high melting point metal and low melting point light alloy, with low cost, high efficiency and excellent quality.

The invention discloses a cutting-stirring friction welding composite processing device for a floating double-shaft-shoulder double-stirring needle and a manufacture method thereof, and particularly relates to a combined or composite processing device capable of simultaneously carrying out milling or cutting processing and stirring friction welding processing and a method thereof. The cutting-stirring friction welding composite processing device for the floating double-shaft-shoulder double-stirring needle integrates a cutting system or a milling system, a stirring friction welding system, a forced cooling system, a gas protection system, a temperature sensing system, a pressure induction system, a milling liquid supply system and a sensing-free system. The cutting-stirring friction welding composite processing device has functions of temperature control, gas protection, pressure detection, cooling liquid protection, milling head replacing and floating double-shaft-shoulder self-supporting stirring friction welding. The method for carrying out cutting-stirring friction welding composite processing on workpieces can meet strength requirements of mechanical processing of ferrous light metal materials, carbon steel materials and alloy steel materials. The cutting-stirring friction welding composite processing device for a floating double-shaft-shoulder double-stirring needle and the manufacture method of the cutting-stirring friction welding composite processing device reduce manufacture procedures, save processing cost, have the advantages of being high in efficiency, excellent in quality, high in stability and saving in energy, break through limitation of conventional machining technology, form a new method and a new thought for machinery processing, and have wide application prospects in industries of heating, air conditioners, ice manufacture, freshness keeping, medicine preparation, construction, aquatic products and foods.

The invention discloses a joint estimation method for synchronizing frames, frequencies and fine symbols for orthogonal frequency division multiplexing (OFDM). The method comprises the following steps: carrying out autocorrelation operations of small point length and big point length on base band data sequences at the receiving terminal in parallel; jointly determining the frame synchronization position in real time and in parallel according to the small point autocorrelation peak and the big point autocorrelation peak; computing integer frequency offset coarse estimation value and decimal fraction frequency offset coarse estimation value according to the small point autocorrelation peak and the big point autocorrelation peak; estimating the final frequency offset detection value from the integer frequency offset coarse estimation value and the decimal fraction frequency offset coarse estimation value with a frequency offset dereferencing decision device; carrying out frequency offset correction on the base band data sequences according to the estimated final frequency offset detection value; and carrying out cross-correlation on the corrected base band data sequences and the local data sequences and determining the accurate fine symbol synchronization position through the cross-correlation peak. The contradiction of complex system measure function hardware design in the traditional time-domain joint estimation systems is solved by using the method.

This invention belongs to petrochemical industry technology. This production method of high order road asphalt is broke into three steps: vacuum residuum hand led by butane deasphalt craft, obtain high softening point, low waxen oil removing uintahite as hard component of pitch adjustment; carry out topping hand le(namely decompression fractionation) to catalytic cracking oil, obtain high flash point, low waxen topping heavy oil slurry as low-energy component of pitch adjustment; carry out on-line concoction to oil removing uintahite and topping heavy oil slurry, obtain high order road asphalt. This invention mostly utilize butane oil removing uintahite of paraffin - intermediate base or middle -paraffin base commingled crude oil, and sixpenny catalytic cracking topping heavy oil slurry to high order road asphalt, enlarge crude resources of road asphalt production, advance start work of butane deasphalt unit.

A size optimization design method for an aircraft thermal protection system based on section reliability comprises the following steps: 1. mathematical modeling, according to the structural form of the thermal protection system, determining a size related design variable, and according to the temperature requirement, establishing a heat proof structure weight reduction optimization model; 2. describing the material, external load and uncertainty in an initial/boundary value condition by utilizing the section in a quantifying manner; 3. carrying out reliability switch on the temperature constraint condition containing an uncertain parameter based on a section possibility degree; 4. utilizing the section limited volume method, realizing quickly solving of the structure transient temperature response range, and changing a two-layer nesting optimization problem into a conventional single-layer optimization problem; 5. carrying out programming calculation on switched single-layer optimization problem containing the reliability restraint, and determining an optimal solution to reaching an optimal weight reduction effect. The invention can systematically solve the thermal protection system structure optimization problem containing multisource section uncertainty, improves the computational efficiency, and ensures the reliability and the safety of the structure use.

The invention provides a measuring method for fiber optic gyroscope eigenfrequency, which is based on the fiber optic gyroscope eigenfrequency measuring system of even double frequency eigenfrequency square wave phase overmodulation, wherein the light path adopted by the measuring system is completely identical with that of the actual gyroscope; and the typical light path includes a light source, a coupler, a Y waveguide, a fiber loop and a photoelectric detector. Compared with the existing method, the measuring method reduces the strict requirements for the square wave modulated signal quality, has the advantages of simple method, low cost and easiness for realization, and can greatly improve the measuring precision of the eigenfrequency on the basis that the existing gyroscope does not require additional hardware.

The invention relates to an ultra high speed test CRH train bogie and belongs to the field of railway vehicle bogie devices with elastic deformation buffering capacity, the problem of welding stress centralization is solved by a horizontal and longitudinal beam integrated type tray frame, and a wing-shaped elastic support arm of an elastic frame can have a damping effect by own elastic deformation. According to the novel bogie, by the aid of matching usage of the elastic frame and motor suspension devices with vibration absorption functions, high cut-down and inhibition effects can be realized on motor vibration, and accordingly, the vibration frequency control difficulty of a power system is reduced greatly and surplus vibration damping buffering components can be effectively cut down, so that redundant components can be simplified greatly, the structure dimension is shortened, and the weight is reduced. Master pin backward titling structures of traction wheel sets can swing consistently in S shapes. The ultra high speed test CRH train bogie can overcome inherent mutual contradiction of dual requirements on two aspects of lightweight design and speed lifting of a 500km/h ultra high speed train and is a novel breakthrough in the field of localization ultra high speed bogies.

The invention relates to a method for forging thick-walled ring-shaped parts. The method includes the following process steps: step 1: steel ingot sawing; step 2: upsetting and punching; step 3: drawing out on a mandril: the drawing-out ratio is controlled at 1.8 to 2.2; and step 4: secondary upsetting and finishing. Since the method adds the processes of drawing out on the mantril and secondary upsetting after punching, in the process of drawing out on the mantril or reaming, the effective wall thickness of the forging is already quite small, pressure can be easily transferred to the central part of the forging during forging, the deformation pressure can deform the core of the billet due to the great reduction of the effective forged thickness, moreover, the core receives pressure stress in three directions, the as-cast structure of the steel ingot is changed, in-situ pores are forged to be closed, the defects of segregation and inclusion are improved, and thereby the internal quality of the forging is greatly improved.

The invention discloses a ghost false-shadow method of echo plane imaging technique based on even marking object, which is characterized by the following: placing a magnetic sensitive marker on the left side of imaging view field out of rectangle region; proceeding magnetic resonance imaging of marker and object; transmitting two-dimensional inversed Fuliye operation through placing 0; proceeding time inversing operation of image rebuilding or placing 0 and two-dimensional inversed Fuliye transmission; obtaining two plural images; calculating the even phase difference of each row of pixel in two plural image marking regions; fitting the even phase difference through higher-order polynomial; estimating the even phase difference out of the marker region; correcting the image phase; adding; obtaining the magnetic resonance image of ghost false-shadow. The invention improves the noise-proof property, which is convenient to operate.

The present invention discloses a three-dimensional deformation estimation method for high temporal and spatial resolution at a mining area surface. The method comprises: separately forming each orbital SAR data into a set of InSAR interference pairs; then obtaining a monitoring data set from one-dimensional radar line of sight to multi-temporal deformation at the mining area surface; jointly solving the monitoring data set from one-dimensional radar line of sight to multi-temporal deformation at the mining area surface and a prior model for a linear proportional relationship between horizontal movement caused by mining subsidence and subsidence gradient to obtain a three-dimensional multi-temporal deformation observation field along vertical, west-east and north-south directions of the mining area surface; establishing an observation equation for a three-dimensional deformation rate during time-adjacent SAR images in a multi-track SAR image data set and the three-dimensional multi-temporal deformation observation field; and solving the observation equation to obtain a three-dimensional deformation of high temporal and spatial resolution at the mining area surface. The present invention overcomes the stringent requirements and limitations for observation measurement and observation geometry in a traditional InSAR three-dimensional deformation estimation method; the time resolution of a monitoring result is obviously improved, and a more accurate result is obtained.

This invention relates to a mode number converter of a structure suppressing input of common-mode shift composed of an input sample maintainance circuit, 6 stage allowance gain pipelines, 7 sub-mode number converters, 6 sub-digifax converters, a pipeline output synchronous circuit and a connected digit correction circuit, among which, the sample maintainance circuit applies a switch technology of grid boostrap and an independent internal input/output common mode voltage structure at the forefront of the entire pipe line, the 7 sub-mode number converters generate 14 bits data output to get the last 8 bits quantization digit output via the synchronous and digit correction circuits.

The invention discloses a working platform leveling device of a hydraulic aerial cage. The working platform leveling device comprises a link-type crank arm, a bracket, a crank arm derricking cylinder, a primary leveling hydraulic cylinder and a secondary leveling hydraulic cylinder, wherein the link-type crank arm comprises a first link span, a first pull rod, a second pull rod and a second link span; a first pull rod and a second pull rod in a left-right direction are parallelly and respectively articulated with the first link span and the second link span in a staggered manner; and hinge joints B, C, G and F jointly define a first four-link mechanism, hinge joints C, D, H and G jointly define a second four-link mechanism, and the shared hinge joints C and G of the two four-link mechanisms entirely constitute a double-parallel four-link mechanism. The working platform leveling device of the hydraulic aerial cage is capable of realizing rotation (greater than 180 degrees) without dead points of the link-type crank arm, is large in operation range, high in flexibility, simple and compact in structure and low in manufacturing cost, has the advantages of beautiful appearance, reverse inclination prevention capability, anti-seizing capability and large operation range, and is applicable to various hydraulic aerial cages.

The invention relates to a method of controllably preparing a nitrogen-sulfur co-doped carbon nanotube by taking halloysite as a template, and belongs to the scientific and technical field of batterymaterials. The method includes taking the halloysite, thiophene and pyrrole as raw materials, performing low-temperature polymerization on the halloysite and the thiophene to obtain a halloysite/thiophene composite material, mixing the halloysite/thiophene composite material with the pyrrole to obtain halloysite/conducting polymer composite material, performing high-temperature treatment on the composite material, and removing the halloysite to obtain the nitrogen-sulfur co-doped carbon nanotube. The invention further provides application of the nitrogen-sulfur co-doped carbon nanotube obtained by the preparation method. The nitrogen-sulfur co-doped carbon nanotube is applied to fuel cell catalysis on negative-electrode oxygen reduction reactions.

The invention provides a reliable multimedia memory method. The method utilizes the concentrative memory mode of a server, starts a DVR local memory when the network fails and re-memorizes in the server after the network recovers. The method has the advantages of good system stability and simple and convenient video management; the video recording file generated when the network fails is uniformly managed in the DVR magnetic disk memory and is automatically uploaded to a stream media server; the method is especially suitable for the user environment in a remote video monitoring platform where the video is extremely strictly required; furthermore, the method reduces the severe requirements which need to be considered by the remote video monitoring system for the user customized record memory strategy.

The invention relates to a fiber optic interferometric system for reducing the influence of fiber birefringence. Laser is emitted by a laser device and transmitted to a fiber optic coupler through a source fiber; the laser is split by the coupler and then output to a metric arm and a reference arm of the fiber optic interferometric system respectively, wherein, one path of light is incident to light reflection device of the metric arm through a fiber optic depolarizer of the metric arm and an optical fiber of the metric arm; the reflected light returns to the fiber optic coupler through the original path; the other path of light is incident to a light reflection device of the reference arm through a fiber optic depolarizer of the reference arm and an optical fiber of the reference arm; the reflected light returns to the fiber optic coupler through the original path; the two path of reflected light form an interference light signal in the coupler; the signal is received by a photoelectric detector as an interference signal through an optical fiber of the detector; and the interference signal is transmitted to an operational processing system through a signal transmission line to obtain the size of the outside physical quantity signal. The fiber optic interferometric system used for metering outside physical quantities such as vibration eliminates the influence of the random variation of the polarization state in the ordinary fiber optic interferometric system on the signal of the fiber optic interferometric system.

The invention relates to a method for preparing a nano material with large thickness and area through acute plastic deformation. The method comprises the following steps: adopting carrying current acute stirring friction forced highly undercooled control technology under the action of electromagnetic vibration in-situ compound electromagnetic field to prepare a metallic nano grain material and a ultrafine grain material with large thickness and area; adopting an electromagnetic vibration coil to ensure that a stirring head carries out high-speed stirring and electromagnetic vibration stirring friction composite motion combined with electromagnetic vibration at a certain frequency; and forming an alternating electromagnetic field of a certain intensity inside a workpiece. Under the joint action of carrying current stirring friction and a forced highly undercooled control temperature mechanism, coarse grain structure of the metal surface in a certain thickness undergoes acute plastic deformation and breaks to form stable nano grain and ultrafine grain structure; thus, the method realizes the preparation or surface modification of the metallic nano material with large thickness and area and uniform structure, and can also be used in stirring friction welding.

The invention discloses a multi-longitudinal-mode high-spectral-resolution lidar based on an interference spectrum frequency detector. Different from the work condition that a single-longitudinal-mode laser device has to be adopted in a traditional HSRL system, the HSRL can work under the condition that a multi-longitudinal-mode laser device serves as an emitting light source. The characteristic that spectrum frequency discriminating curve of the interference spectrum frequency detector is periodical is ingeniously used, the interference spectrum frequency detector has the same inhibition effect at frequency centers of all longitudinal modes as long as designing the period of the frequency discriminating curve to be matched with longitudinal modes of the laser device at intervals, and accordingly the spectrum separation aim the same as that of single-longitudinal-mode work is achieved. The multi-longitudinal-mode HSRL can remarkably reduce dependency of the HSRL on the single-longitudinal-mode laser device, can also reduce cost, size and weight of the laser device, greatly improves stability of a whole system, and plays a very important role in development of airborne and satellite-borne HSRL loads in China.

The invention discloses self-repair reaction type polymer cement waterproof coating and a method for preparing the same. The self-repair reaction type polymer cement waterproof coating comprises double components including liquid and powder, and particularly comprises, by weight, 35-50% of polymer liquid, 15-30% of cement, 10-30% of powdery fillers and 5-15% of micro-capsule materials on the basis of the total weight of 100%. According to the technical scheme, the self-repair reaction type polymer cement waterproof coating and the method have the advantages that water absorption materials with swelling properties wrap materials with quick curing and gelating properties by the aid of micro-capsule technologies, the materials with the quick curing and gelating properties can be uniformly dispersed in the self-repair reaction type polymer cement waterproof coating, capsules inside the self-repair reaction type polymer cement waterproof coating can be exposed from fracture when the self-repair reaction type polymer cement waterproof coating is broken by base layers by means of drawing, the water absorption wall materials of the self-repair reaction type polymer cement waterproof coating can be softened, swollen and broken after absorbing water, internal repair materials can flow out and can be quickly cured and gelated when in contact with the water, accordingly, crack can be blocked, self-repair effects can be conveniently, easily, timely and automatically realized without influence on the quality of polymers in the self-repair reaction type polymer cement waterproof coating and the performance of the self-repair reaction type polymer cement waterproof coating, and the self-repair reaction type polymer cement waterproof coating and the method are applicable to polyurethane, acrylic acid and epoxy polymers.

The invention discloses cutting-stirring friction-welding combined machining equipment and a manufacturing method thereof. The cutting-stirring friction-welding combined machining equipment integrates a milling system or a cutting system, a stirring friction-welding system, a forced cooling system, a gas protection system, a temperature sensing system, a pressure sensing system, a milling liquid supply system and a non-sensing system. The invention provides a united or combined machining device which can carry out milling or cutting and stirring friction-welding in parallel simultaneously and a method thereof. The cutting-stirring friction-welding combined machining equipment has the functions of temperature control, gas protection, pressure detection, cooling liquid production, milling head replacement and dual-shaft shoulder self-supporting. According to the manufacturing method of the cutting-stirring friction-welding combined machining equipment, the manufacturing processes are reduced and the machining cost is saved. The limitation of the conventional mechanical machining technology is broken through, and a new method and a new idea about the mechanical manufacturing and machining are formed. The cutting-stirring friction-welding combined machining equipment and the manufacturing method in the invention have wide engineering applications to the heating industry, the air conditioning industry, the ice making industry, the freshness retaining industry, the pharmacy industry, the construction industry, the aquatic product industry and the food industry.

The invention discloses a multi-treatment technique and treatment equipment for heavy pollution of soil. The multi-treatment technique includes steps of scientific evaluation of a preset restoration target, soil restoration engineering, and recheck and inspection. The step of scientific evaluation includes determining soil application type, acceptable risk level, the type of pollutants, restoration coverage and final restoration target value. The step of soil restoration engineering includes heavy metal pollution treatment, organic matter pollution treatment and inorganic matter pollution treatment. After qualification is proved through recheck and inspection, the whole process is completed. By the combined treatment technique, efficient treatment efficiency can be guaranteed, and requirements on natural conditions are reduced; experiments verify that transferability and perniciousness of the pollutants to the soil and surroundings thereof can be reduced remarkably; the equipment is simple in structure and unique in design, small technical innovation is made to existing equipment, a qualitative leap is achieved in soil treatment effect, and cost performance is very high.

The invention discloses a high-resolution auto-stereoscopic display which is composed of a switching grating and a flat-panel display screen. The flat-panel display screen can be an LCD, a PDP, an LED or other equipment with a point-to-point image display function. The flat-panel display screen has high refresh frequency and can refresh an image at a frequency which is N times the base frequency under the control of a frequency-doubling player. A synchronizer controls the switching grating to carry out state switching which is synchronous with refreshing of the flat-panel display screen. Each frame of high-resolution stereoscopic synthetic image output by the frequency-doubling player is decomposed into N full-resolution sub images which are sequentially refreshed and displayed in a point-to-point manner in a basic refresh period, and the N sub images can be combined into an image with N-time definition under the action of the switching grating. The high-resolution auto-stereoscopic display has the outstanding advantage that large-viewing-angle and high-definition naked-eye stereoscopic display can be realized.

A luminous device with dependent votlage/resistor layer is composed of a luminous unit with a first and second surfaces, the first electrode on the first surface, the secone electrode on the second surface, and a dependent voltage/resistor layer connected to both the first electrode and the second electrode for antistatic purpose.