156 results about "Mechanical index" patented technology

A system and method for statistical design of an ultrasound probe and imager system, and an associated graphical user interface for selecting input parameters to be used in an ultrasound simulation. The process and computer code allow the performance of a probe and imager combination to be specified and jointly optimized in image quality terms. The designs produced optimize both the image quality and other CTQ (critical to quality) parameters, such as the distribution of regulatory power indices and mechanical index. These CTQs indirectly affect image quality through their effect on patient dose. The Transducer Design Advisor incorporates a graphical user interface for facilitating selection of a parameter set to be used in the simulation. The user selects a desired parameter set by navigating across and interacting with a succession of windows. The user specifies various geometric characteristics of the transducer and how the user wants to simulate the imager system. Finally, the user specifies weights for the various CTQs at different depths. Based on these inputs, the Transducer Design Advisor creates the files needed by the ultrasound simulator.

Composition comprising gas filled microcapsules and a bioactive agent, useful for an ultrasound-mediated delivery of said bioactive agent. The microcapsules comprise a relatively stiff shell of polymeric or lipid material and have in particular a resistance to a mechanical index of at least 0.15, while the bioactive agent is substantially unbound to the shell of the microcapsules. The composition of the invention is particularly suitable for effectively delivering a genetic material into a cell, upon exposure of the composition to a level of acoustic pressure capable of destroying a portion of the microcapsules and releasing the gas contained therein.

A method for delivering ultrasound energy to a patient's intracranial space includes the steps of forming a hole in a patient's skull, locating an ultrasound transmitter near or into the hole, and transmitting ultrasound from the transmitter into the intracranial space, wherein the Mechanical Index of ultrasound energy traveling through cerebral tissue in the intracranial space is less than 1.0, the power intensity delivered to a target tissue in the intracranial space is greater than 50 mW / cm2 and less than 200 mW / cm2, and the frequency of the transmitted ultrasound is within the range between 500 kHz and 2 MHz. Microbubbles, aspirin, both microbubbles and aspirin, and a mixture of microbubbles and aspirin, can also be delivered into the intracranial space.

A method for inhibiting hyperplasia at an anastomotic junction of a vascular fistula or vascular graft comprises exposing the anastomotic junction to vibrational energy at a mechanical index and for a time sufficient to inhibit hyperplasia. Kits are described comprising the catheter or a probe suitable for performing the methods together with instructions for use setting forth the methods. The methods and kits are particularly suitable for treating anastomotic junctions formed to provide vascular access for hemodialysis, hemofiltration, and the like. The methods and kits are also suitable for treating other vascular grafts, such as those formed during cardiac bypass graft surgery, vascular repair, and the like.

The invention relates to a cement-based grouting material and a preparation method thereof. The cement-based grouting material comprises a component A, a component B and a component C, wherein the component A comprises the following components by weight part: 80 to 90 parts of epoxy resin, 1 to 10 parts of diluents, 0 to 1 part of defoaming agent and 1 to 5 parts of coupling agent; the component B comprises a water-soluble amine curing agent with an emulsification function; the component C comprises the following components by weight part: 30 to 50 parts of cement, 2 to 4 parts of ultrafine mineral powder, 0 to 1 part of silica micropowder, 2 to 4 parts of expanding agent, 0 to 1 part of water-reducing agent and 40 to 60 parts of river sand; and the weight ratio among the component A, the component B and the component C is (60 to 100) : (90 to 150) : (400 to 800). Mechanical indexes, such as compressive strength, breaking strength and the like, of the cement-based water-soluble epoxy resin grouting material are far more excellent than those of the common cement grouting material.

A method for delivering ultrasound energy to a patient's intracranial space includes the steps of forming a hole in a patient's skull, locating an ultrasound transmitter near or into the hole, and transmitting ultrasound from the transmitter into the intracranial space, wherein the Mechanical Index of ultrasound energy traveling through cerebral tissue in the intracranial space is less than 1.0, the power intensity delivered to a target tissue in the intracranial space is greater than 50 mW / cm2 and less than 200 mW / cm2, and the frequency of the transmitted ultrasound is within the range between 500 kHz and 2 MHz. Microbubbles, aspirin, both microbubbles and aspirin, and a mixture of microbubbles and aspirin, can also be delivered into the intracranial space.

The weapon interface mounting device is designed to permit a secure interface between a Mil-Std 1913 or similar rail and a compatible component such as an optical device, bipod, or light source. It can be easily installed, requires no adjustment by the user, and will mate securely to rails that are out of specification or poorly manufactured. The weapon interface mounting device utilizes a constant force system that applies adequate pressure to positively secure any accessory or device despite being subject to rough treatment such as recoil shock from a host weapon. Unlike prior art devices, the weapon interface mounting device insures repeatability by utilizing a mechanical index system.

Automated determination and setting of an ultrasound system transmit power level is provided for contrast agent imaging. Low mechanical index imaging of contrast agents allows substantially continuous imaging of contrast agents without destruction. By comparing data associated with different transmit power levels, different delays between acquisition or different acquisition sequences, a contrast agent imaging transmit power generally minimizing destruction of contrast agents and maximizing signal-to-noise ratio is automatically determined.

The invention discloses a method for solidifying sludge with a high water content. At first, dredged sludge is collected and stored, basic physical indexes of sludge are measured, the sludge and alkali residues are mixed to form matrix soil; a curing material is added and then is evenly mixed and stirred; then the matrix soil containing the curing agent is transported to a fixed location; the matrix soil is covered and cured for a prescribed period; and finally the mechanical indexes of cured sludge are measured. The optimal ratio of alkali residues to dry sludge is 30-50:100. The curing material comprises following components in percentage by the weight of dry mixed soil: 10 to 25% of mineral powder, 0.1 to 0.5% of super absorbent resin, and 2 to 6% of sodium silicate. The cooperative effect between alkali residues and sludge with a high water content is utilized to form matrix soil; super absorbent resin is used to reduce the water content of sludge, the utilization rate of alkali residues is increased, the solidification cost is reduced, and the solidified soil has the advantages of high early strength and low compressibility and meets the engineering requirements of filling soil.

The invention discloses a testing system and a testing method for mechanical property of a coal rock test piece. The testing system comprises traditional mechanical property testing, a medical image and rock breaking intelligent monitoring; the traditional mechanical property testing comprises a mechanical index testing system and a hydraulic control continuous loading system; the medical image comprises an X-optical mechanical scanning system and an enhancing image system; the rock breaking intelligent monitoring comprises a sound emitting monitoring system and a thermal infrared monitoring system. The testing method for the mechanical property of the coal rock test piece particularly comprises the following steps that 1 a mechanical test platform and DR / CR image equipment are started; 2 the coal rock test piece is placed on the carrying disc position of a mechanical test machine, and an AE sensor and the test piece are fixed; 3 a contrast agent is injected; 4 one-time DR / CR image scanning is conducted; 5 a mechanical property test is carried out on the coal rock test piece. The obtained image is clear in picture, the analysis carried out on the microscopic scale such as internal microcracks of the rock sample test piece is achieved, and the experimental data are more accurate.

The invention discloses a method for measuring and representing microcosmic interface phases of asphalt concrete. According to the method, a small asphalt concrete piece is wrapped with epoxy resin AB glue and cured into a flat cylindrical test piece in a mold to prevent the small asphalt concrete piece from being stripped and deformed in the follow-up polishing process and improve the polishing flatness; the test piece is polished with metallographic abrasive paper, and then a final test piece meeting the requirements is obtained after ultrasonic cleaning is performed on the test piece when polishing is completed; the test piece enters a measuring step, all surface phases of the test piece are observed through amplification with a nanoindentation instrument, a measuring region containing all the phases is selected, equally-spaced dotting measuring is performed, and a load-displacement curve and a microscope image are recorded; after the test is finished, the Young modulus and hardness of all the points are computerized according to the load-displacement curve, and then the modulus and hardness indexes of all the phases are obtained by combining the phases where the measured points are located; finally, the size and the mechanical characteristics of a microcosmic interface transition area between asphalt and aggregates in the test piece can be analyzed and estimated according to the changing condition of the distance among the measured points and the mechanical indexes.

The invention discloses a fluid-solid coupling similar material for a model test. The material consists of the following raw materials in part by weight: 1 part of standard sand, 0.05 to 0.15 part of barite powder, 0.05 to 0.15 part of talcpowder, 0.05 to 0.125 part of cement, 0.04 to 0.12 part of vaseline, 0 to 0.15 part of silicone oil and 0.05 to 0.1 part of mixing water. Hydraulic cement and non-hydrophilic vaseline are taken as cementing agents in the material, so that the problem that the similar material is softened and disintegrated when meeting water is solved, and the strength and elastic modulus of the material can be adjusted in a wide range; the silicone oil is taken as an adjuster, so that the water physical indexes such as permeability and the like of the material can be adjusted under the condition that the mechanical indexes of the material are basically not influenced, and the physical and mechanical properties and water physical properties of the material can meet the test requirement; and compared with previous research, the invention has the advantages that: the intercoupling effect of a rock body and water is truly simulated, and the obtained geomechanical similar model test research result is more accurate.

A method for building a fine grain tailing project property index estimation empirical formula based on linear regression includes the following steps: 1) collecting and settling fine grain tailing data physico-mechanical index sample data; 2) adopting the mu+ / -3sigma abnormal value rejection principle to conduct preliminary screening on the sample data; 3) conducting secondary screening on the sample data based on mathematical statistics; 4) building a linear regression mathematical model; 5) determining model parameters; 6) conducting model goodness inspection; 7) building the fine grain tailing project property index estimation empirical formula. The method has the advantages of providing forceful support for scientificity and reliability of a data regression analysis result through massive test data information, providing reliable parameter choice for fine grain tailing base stability evaluation and design in future, greatly saving project investment cost and soil engineering test investment, avoiding unnecessary project building cost, enabling a research result to have popularization and application value and being simple, practical, reliable in result, efficient in computing and the like.

The transportation of therapeutic substances through internal tissue is enhanced by surgically implanting an ultrasound transducer in immediate proximity to the target tissue and oriented to direct ultrasound having selected characteristics toward the target tissue. The parameters of frequency, mechanical index, pulses per cycle and pulse repetition frequency are selected within defined ranges to cause molecules to be transported at a rate and over a distance substantially greater than by natural diffusion.

An ultrasound diagnosis apparatus providing a map of an interest index. The ultrasound diagnosis apparatus includes: a calculating unit for calculating a mechanical index (MI) corresponding to a depth value in a direction in which ultrasound travels from an ultrasound output part of a transmission transducer; a visualization unit for generating an MI map in which a relationship between the calculated MI and the depth value is visualized in the form of a graph; and a display unit for displaying the MI map.

The invention discloses a method for determining mechanical parameters of the stratum via the Rayleigh wave speed. According to the method, information from Rayleigh wave exploration is fully utilized, the mechanical parameters of the stratum in geotechnical engineering are inverted according to the Rayleigh wave speed, comparative verification is carried out by combining drilling data, shearing wave speed and indoor geotechnical test, the different mechanical parameters of the stratum are determined via the Rayleigh wave speed, and reference values of stratum mechanical indexes and stratigraphic division are provided for exploration in geotechnical engineering without drilling and pitting data. The method of the invention is efficient, economical and practical, a lot of drilling and pitting work can be reduced, the method is especially suitable for landform and geologic positions which a drilling machine can hardly reach, a result is reasonable and effectively, the working efficiency is greatly improved, the cost is reduced, and an effective solution is provided to determine the mechanical parameters in geotechnical engineering of the stratum.

The invention relates to a large-scale high-density wood-based material. The blank of the large-scale high-density wood-based material is jointly formed by wood veneer from quick growing species of trees or salix psammophila wicker from shrubs, net-shaped cotton gauze and phenolic resin. By means ofThrough a method for manufacturing the large-scale high-density wood-based material through microwave heating, pressing and gluing, the blank undergoes the five procedures including pre-pressing, heating softening, pressing densifying, heating solidifying and pressure keeping cooling in a vertical and horizontal integrated microwave heating press and then can be manufactured into the large-scale high-density wood-based material of 2500mm-30000mm*400mm*300, the density of the material is larger than or equal to 0.7 g / cm<3>, and the mechanical indexes of the material can meet various index requirements of building materials. Thus, an environment-friendly and energy-saving wood engineering structure material is provided for the building industry, favorable support is provided for developing multi-storey wood structure houses, and the large-scale high-density wood-based material is favorable for protecting natural forest resources and controlling desert.

Automated determination and setting of an ultrasound system transmit power level is provided for contrast agent imaging. Low mechanical index imaging of contrast agents allows substantially continuous imaging of contrast agents without destruction. By comparing data associated with different transmit power levels and spatial locations, different delays between acquisition or different acquisition sequences, a contrast agent imaging transmit power generally minimizing destruction of contrast agents and maximizing signal-to-noise ratio is automatically determined. By using contrast agent specificity for setting the transmit power in addition or alternative to destruction of contrast agents, harmonic imaging may be improved.

The invention discloses an optimization method for the slope shape of the end wall of an open-pit mine, and belongs to the field of open-pit mining. The method includes the steps of combining specificconditions of the slope of the end wall of an open-pit mine, qualitatively analyzing stability influencing factors and a potential landslide mode; conducting a mechanical experiment on the rock massof the slope of the end wall of the open-pit mine to obtain physical and mechanical indexes; determining a safety reserve coefficient K of the slope of the end wall of the open-pit mine; dividing theslope of the end wall of the open-pit mine into n stages; adjusting the width of a flat plate at each stage, and when a stability coefficient Fs satisfies |FS-K|< / =0.01, completing the slope shape optimization of each stage; and combining a strength reduction theory algorithm, using FLAC3D finite difference numerical simulation software for simulation test on the optimal slope shape scheme obtained above, and further verifying the feasibility of the optimal slope shape. The method ensures the maximum recovery of the compressed coal under the end wall, provides a basis for the design of the slope shape, and also creates a large number of economic benefits for the open-pit mine.

The invention relates to a production method and manufacturing technology (attached drawings) for a moulded board from corn stalk serving as raw materials, and mainly solves the problems of energy consumption, three wastes, density, internal bond strength, expansion ratio and formaldehyde release in the prior art. The method is mainly characterized by comprising the following steps of: crushing the raw materials twice to achieve the grain diameter of 1 to 15 mm and the moisture content of 15 percent or below, and determining the apparent density of the raw materials to between 0.09 and 0.13 g / cm<3> after three kinds of size grading; determining the finished product density to between 0.4 and 0.55 g / cm<3> by contrasting the density of wood; solving the compression ratio of 2.5 to 4.5 by using the ratio of two densities; stirring 70 to 80 mass percent of raw materials and 20 to 30 mass percent of adhesive for 10 to 15 minutes, putting into a mould, and performing hot press molding at the temperature of between 135 and 170 DEG C for 25 to 40s / mm under the pressure of between 2.0 and 3.5 MPa. The method has the advantages that: by modifying parameters of a material preparing stage, and transforming crushing, stirring and hot-pressing equipment in the operation process and modifying the hot-pressing technological parameters, the method reduces the density deviation, improves the internal bond strength, reduces the expansion ratio and free formaldehyde release amount and makes physical and mechanical indexes of the finished products exceed the standard of the like products.

The invention discloses a micro-surfacing mixture mineral aggregate grading optimization design method. The method comprises the following steps of 1) determining different mineral aggregate grading schemes through the throughput of key sieve holes; 2) determining the stacking density of each scheme of the different mineral aggregate grading schemes; 3) performing initial performance testing on different graded mineral aggregates; 4) determining physical and mechanical indexes of the different graded mineral aggregates; 5) performing road performance examination on the different graded mineral aggregates; 6) determining micro-surfacing mixture optimal mineral aggregate grading. According to the method disclosed by the invention, the quality of the micro-surfacing mixture mineral aggregate grading is judged by adopting an aggregate stacking density method, so that a micro-surfacing mixture with a dense framework structure is obtained; moreover, the earlier-stage and later-stage road performances of the micro-surfacing mixture are comprehensively considered, so that a micro-surfacing mixture with great high temperature stability, skid resistance and relatively high abrasion resistance is obtained. According to the design method provided by the invention, test data is accurate and reliable; by referring to a testing method for a hot-mixed asphalt mixture, the popularization value is very good.

The invention relates to a soft foundation treatment method employing 'cutting drainage deep preloading and dynamic consolidating'. Water sealing, strong drainage, deep-layer vertical discharge system, vibrating compacting or dynamic compaction are organically combined to reduce an additional load formed by the ground water level of a deposal field, so as to carry out deep preloading on a soft substratum, finish consolidation of a soft soil layer and remove sedimentation of a soft substratum; compactness and physical and mechanical indexes of a shallow sediment are improved by organic combination of dynamic consolidation and cutting drainage, and the capacity requirements on the field are met. The method comprises the following construction implementation processes of: 1) punching a waterstop curtain and a strong drainage system, reducing the ground water level and the moisture content of a soil body; 2) punching a vertical drainage channel penetrating a silt seam, carrying out the deep-layer preloading and removing the sedimentation; 3) carrying out the dynamic consolidating, so that the compactness and the physical and mechanical indexes of the shallow sediment are improved, and the capacity requirements on the field are met. According to the method, the problems and the defects in the prior art are overcome, and the soft foundation treatment method has the characteristics that the schedule is short, the construction cost is low, the process is simple, the quality is controllable and the difficulty of deep-layer silt engineering can be solved.

The invention relates to a cutting method for adjusting crystal orientation excursion by rotating a single crystal rod. In the cutting method, during sticking of the single crystal rod, a reference surface is towards the upside and is parallel to a sticking steel plate; the horizontal excursion direction of the crystal rod is kept to the right; then the crystal orientation excursion of the crystal rod on an x-axis and a y-axis are tested; the excursion and the rotation angle of the crystal rod are calculated according to a vectorial principle; the y-axis is kept still horizontally and is adjusted through the rotation angle so as to obtain correct crystal orientation excursion. When the cutting method is adopted, the crystal rod is kept still horizontally on the y-axis through the rotation of the crystal rod to a certain angle and a certain direction; and excursion is only implemented on the x-axis to complete the crystal orientation excursion cutting. The cutting method not only is simple and easy, but also can improve the mechanical indexes of silicon wafer machinery; meanwhile, the cutting method greatly improves the yield of the cutting wafers of the crystal orientation excursion crystal rod.

The invention discloses a rock mass real-time wave velocity measurement and quality evaluation method and belongs to the technical field of rock mass engineering. The method is characterized in that abutton of an ultrasonic wave sending device is continuously pressed at different ultrasonic wave sending positions and at different time, and the speed of ultrasonic waves propagated to each sensor each time is continuously calculated, and inversion is performed according to parameter change values such as wave speed, attenuation coefficient, waveform, frequency, frequency spectrum, amplitude andthe like to obtain physical and mechanical indexes and microstructure characteristics of the rock-soil body, such as change conditions of pores and cracks, so as to analyze the stability condition ofa mine rock body. The device is advantaged in that the device is combined with a micro-seismic system, testing can be completed only by arranging an ultrasonic sending system, operation is easy, theprice is low, and practicability is high; the ultrasonic testing technology has strong advantages in the field of rock-soil testing, ultrasonic waves have geometrical acoustics and physical acousticsat the same time, directivity of the sound waves is good, and energy is high; flexibility is high, and the test time, the test frequency, the test depth and the test position can be manually controlled.

A method and instrumentation for ultrasound mediated delivery of drugs to diseased tissue use ultrasound beams with frequency and focusing that provides an ultrasound radiation force acting on the drug and surrounding fluid, which produces a convection of drugs and compensates for the lack of a pressure gradient. To manipulate drug encapsulations and also stimulate transport of drugs across biological membranes, like the cell membrane or the blood brain barrier, the method and instrumentation use low frequency beams with high mechanical index. The method and instrumentation additionally uses ultrasound heating of the tissue to increase blood flow and manipulate thermally sensitive particles.

The invention discloses an optimization method for slant-basement inner-dumping-site side slope shapes, and belongs to the field of opencast working. The optimization method includes the steps that (1) influence factors of the stability of slant-basement inner-dumping-site side slopes and potential landslide modes are qualitatively analyzed; (2) inner-dumping-site side slope rock-soil bodies are subjected to mechanics experimenting, and physical mechanical indexes of the side slope rock-soil bodies are obtained; (3) the safety reserve coefficient K of the slant-basement inner-dumping-site sideslopes is determined; (4) the slant-basement inner-dumping-site side slope shapes with different discharging heights and different flat plate widths are designed, and the optimal side-slope stabilitycoefficient and the maximal discharging space are designed; (5) the obtained optimal side-slope-shape scheme is simulated and checked through FLAC<3D> finite difference numerical simulation softwarewith the strength reduction theory algorithm, and the feasibility of the optimal side-slope shape is further verified. According to the optimization method, the inner-dumping-site stability and continuous development of inner dumping space are guaranteed, a basis is provided for designing of the side slope shapes, and meanwhile a large amount of opencast working cost is saved.

The invention relates to a low temperature-seepage-force coupling effect tunnel model test system and a test method. The test system mainly comprises a steel structure main loading frame portion, a seepage portion, a low-temperature refrigeration equipment portion and an automatic monitoring-feedback analysis portion. An overall counterforce frame is formed by welding H section steel, jacks used for simulating vertical loads are respectively arranged at two sides of the upper part of a model, a load is applied through pressure transmitting I-steel, and openable baffle plates are arranged in front and back. A stainless steel water tank is arranged on the steel structure main loading frame, the whole body is composed of a hydraulic pump, a water storage tank, a stop valve and the like, and the lower part of the stainless steel water tank is provided with a hole. Variations in the temperature of a cavity are realized by adopting an evaporator with a special form. Data real-time acquisition and feedback analysis are carried out based on technologies such as automatic monitoring and wireless transmission technologies and an intelligent optimization algorithm. Similar materials are proportioned according to actual rock physical and mechanical indexes, the similar materials are loaded into the overall loading frame, a vertical load is applied, and excavation for a tunnel cavity is carried out.

The invention relates to a determination method suitable for deeply-buried large-diameter soft rock hydraulic tunnel reserved deformation and aims at providing a method for directly determining the deeply-buried large-diameter soft rock hydraulic tunnel reserved deformation under different conditions, directly calculating the deformation required to be reserved according to surrounding rock categories, tunnel size, ground stress magnitude and supporting intensity, providing a convenient means for tunnel cross section size design, enabling the introduction threshold to be low and enabling the working efficiency to be remarkably improved. The technical scheme is that the method comprises the steps of (S1) determining initial ground stress; (S2) determining the surrounding rock categories and obtaining corresponding physical-mechanical indexes including Poisson's ratio, elasticity modulus, cohesive force and internal friction angle according to the surrounding rock categories; (S3) utilizing a formula (shown in the description) to calculate displacements of tunnel periphery under the conditions of different rock categories, different supporting intensities, different tunnel sizes and different ground stresses according to the actual situation, namely the reserved tunnel deformation.

The invention discloses a modular structure mechanical experiment platform system, which comprises an experiment operation platform, an experiment structure system, a loading device and a measuring device. The experiment structure system comprises standard rod pieces, connecting joints and support parts; the standard rod pieces are basic modules for constituting an experiment structure; the connecting joints are used for being connected with the standard rod pieces to achieve hinged connection or rigid connection between the standard rod pieces; the support parts and the experiment structure are connected through the connecting joints, and the experiment structure is fixed to the experiment operation platform and provided with boundary constraints; the loading device is used for applying loads on the experiment structure and meets the loading condition in current theory teaching; and the measuring device is used for measuring the load, deformation and the internal force mechanical index of the experiment structure. The modular structure mechanical experiment platform system in civil engineering specialty teaching has the advantages of safe operation, high accuracy degree, high designability, comprehensive function, high teaching efficiency and the like, and autonomous teaching of the course experiment part of 'structural mechanics' is achieved.