591 results about "Material density" patented technology

A gastrointestinal implant device is positioned in a patient's small intestine or rectum and produces an outward force that itself produces a distension signal which is a therapeutically useful neural or humoral signal that evokes satiogenic or weight loss effects by itself. The device may advantageously be placed in the duodenum adjacent the pylorus or in the jejunum, ileum or rectum. The distension signals may amplify chemosensory or mechanosensory signals such as enteroendocrine secretions within the patient. The device may be a mesh and include a low material density that allows for unrestricted chyme absorption within the small intestine and unrestricted chyme flow through the gastrointestinal system. A method includes inserting the device into the patient then either retrieving the device after treatment is complete or allowing a device formed of a biodegradable material to degrade in time after treatment is complete.

The invention provides bicycling shoes having soles containing materials of at least two different material densities configured to provide improved comfort, and fit for a wearer when walking or running in the shoes, while providing enhanced force transfer from the wearer to a bicycle pedal when bicycling in the shoes.

A method for analyzing materials in an object includes acquiring x-ray projection data of the object at high energy and at low energy for a plurality of views. The acquired x-ray projection data is utilized in a material decomposition to determine material densities at each pixel for two selected basis materials. A composition of an object at each pixel is determined utilizing a determined mapping of material density regions for the two selected basis materials. An image indicative of the composition of the object is displayed utilizing the determined composition.

A method of controlling a motor (106) used to drive a screwdriver bit (105) such that screws (107) are seated to the optimum point of grip between the screw (107) and the work piece material. An electronic control circuit controls the speed and output torque of the motor (106). The control system utilizes pulse width modulation (PWM) to control motor (106) speed and torque. The PWM signal controls the duty cycle of the transistors that supply current to the motor (106). The amount of current flowing through the motor (106) coils is proportional to the amount of torque the motor (106) is producing. Motor (106) current is measured as voltage produced across a precision resistor that is in series with the motor (106) coils. As the current in the motor (106) increases, the voltage across the resistor increases (V=IR). To accurately measure the torque, as measured by the voltage across the precision resistor, a capacitor with a resistor and/or a diode is used to average the analog signal that is measured by the microprocessor. The microprocessor further filters the analog signal using an averaging formula to produce a stable value corresponding to motor (106) torque/current. When a decrease in current, corresponding to a drop in torque, is detected at the optimum point of grip, the controller (100) stops the motor (106).

A self-sufficient material property profile regulation method and system, for adjusting fluid property profiles such as in an ocean of multiple property layers, is described. Using this Fluid Property Regulator, the property profiles of a non-enclosed material, including property profiles related to material density, chemical characteristics and space-time position, are affected due to motion of the material relative to a body in the flow stream. The state of other matter with which the initial material then makes direct or indirect contact is also affected. For example, in the case of a liquid such as an ocean current, the temperature, salinity, nutrient content and other properties may be destratified (i.e. layers being combined) as the system lifts large quantities of deep water and combines this material with surface water in the downstream far-field region of the system. The resulting regulation of such ocean water property profiles may then also indirectly affect the properties of the atmosphere above the ocean so that the system can be said to affect planetary properties both oceanic and atmospheric. Rather than merely discharging a pumped material, such as cold water that might quickly re-submerge, the system regulates lasting property profiles. The new Fluid Property Regulator system described in this invention regulates material properties to produce desired outcomes such as increased food and energy production as well as to prevent undesirable outcomes such as hurricanes, elevated planetary temperatures, decreased planetary ice sheet size, raised sea level and glacial freshwater incursions that can halt important major currents.

A method for determining a shear modulus of an elastic material with a known density value is provided. In this method, a spatially modulated acoustic radiation force is used to initially generate a disturbance of known spatial frequency or wavelength. The propagation of this initial displacement as a shear wave is measured using ultrasound tracking methods. A temporal frequency is determined based on the shear wave. The shear modulus of the elastic material at the point of excitation may be calculated using the values of the spatial wavelength, material density, and temporal frequency.

Systems, methods and computer instructions for displaying multi-energy data are provided. Certain methods include: receiving multi-energy data from an operably connected data source; displaying the multi-energy data as an image via a graphical user interface; selecting a region of interest in the displayed image; and displaying information regarding the region of interest via the graphical user interface. Certain methods include: (1) displaying a graph that includes an attenuation line depicting radiodensity versus energy level; (2) displaying a material density graph of a region of interest and/or of results of segmenting a region of interest; and/or (3) displaying information in a window configured to be movable about an interface. Certain methods include: receiving multi-energy data from an operably connected data source; and displaying the multi-energy data as a fused image via a graphical user interface.

The invention discloses a method for iterating and reconstructing a double-energy-spectrum CT image. The method is used for reconstructing a base material density image of a measured object and comprises the following steps of (1) selecting a calibration model body containing tow types of different base materials according to the size of a material of the measured object; measuring the model body through a double-energy-spectrum CT system, and calibrating a double-energy-spectrum multi-color orthographic projection equation presenting a curvilinear relationship between a multi-color projection value and base material thickness combination; (2) collecting double-energy-spectrum multi-color projection data of the measured object by utilizing the double-energy-spectrum CT system; (3) constructing a iterative scheme according to the calibrated multi-color orthographic projection equation, and iterating and reconstructing the double-base-material density image of the measured object through comparison with the practically measured multi-color projection data and addition of a physical constraint condition. Compared with the existing method, the method for iterating and reconstructing the double-energy-spectrum CT image has the advantages that the high energy spectrum and the low energy spectrum of the double-energy-spectrum CT system and an attenuation coefficient of the base materials do not need to be detected in advance, and meanwhile the method is applied to the situation that the high energy spectrum and the low energy spectrum are matched with each other or not in geometry.

The invention relates to a high-temperature-resistant wave-transparent silicon nitride fiber-reinforced composite material and a preparation method thereof. The method comprises the following steps: by using a two-dimensional fabric laying or three-dimensional four-direction knitted continuous silicon nitride fiber preform as a reinforcing body, carrying out interface coating preparation on the reinforcing body fiber surface with a polyboron azane precursor by half-vitrification; compounding the precursor mainly composed of polyboron azane with an impregnation liquid to prepare a base; and carrying out vacuum pressure impregnation, desolventization, pressure crosslinking curing and cracking densification to obtain the final silicon nitride fiber-reinforced composite material. The preparation method greatly enhances the impregnation efficiency, enhances the material density by 18-40%, and finally obtains the novel wave-transparent material system with excellent high temperature resistance. The strength retention rate of the material at 1200 DEG C and 1500 DEG C is 70-94%. Compared with the silicon nitride ceramic material, the novel wave-transparent material has obviously higher breaking strain.

The invention relates to a preparation method for wave-absorbing foam concrete. The preparation method comprises the following step of mixing cement, a physical foaming agent, a wave absorbing agent, a polycarboxylic-acid high-efficiency water reducing agent and water. The preparation method is characterized in that the wave absorbing agent is metal powder, ferrite, fiber, carbon black, crystal whisker or carbon nano tube, wherein the wave absorbing agent and water are mixed according to the mass ratio of 1-40:60-100. The wave-absorbing foam concrete is prepared by premixing the wave absorbing agent by an internal mixing method, mixing uniformly, adding foam and stirring, casting and molding and curing. The wave-absorbing foam concrete has the characteristics of simple molding process, low material density and good wave-absorbing performance.

An electrode is provided for use in a plasma arc torch. The electrode includes a body having a forward portion, a middle portion and an aft portion. The forward portion includes an electrode tip comprising a conductive first material, wherein the electrode tip includes: 1) a pilot contact region for initiating a pilot arc across the nozzle and 2) an emitter. The middle portion comprises a second material and defines a proximal end for mating with the forward portion and a distal end for mating with the aft portion. The material density of the second material is at least half of the material density of the first material. The electrode also includes an electrically conductive path extending from the forward portion to the aft portion of the body.

The invention discloses a high-performance polypropylene nano composite material and a preparation method thereof, and belongs to the field of polymer modification and processing. The high-performance polypropylene nano composite material comprises the components in percent by weight: 39 to 98% of polypropylene, 1 to 15% organic clay, 0 to 30% of inorganic filling material, 0.1 to 6% of compatilizer, 0 to 20% of flexibilizer, 0.2 to 2% of stabilizer, and 0 to 4% of other additive. Through the cooperative modification of nanoscale organic clay and micron-sized talcum powder to polypropylene, a nano composite material with higher rigidity, higher tenacity and other performance is obtained at a lower material density.

The invention discloses a method for preparing high-performance iron nickel magnetically soft alloy by using a powder metallurgy process, which belongs to the technical field of powder metallurgy. The method comprises the following steps of: 1, uniformly mixing various powder such as iron powder, nickel powder, molybdenum powder, silicon powder, copper powder, cobalt powder, chrome powder, niobium powder, tungsten powder, aluminum powder and titanium powder according to a certain ratio, wherein the nickel content ranges from 30 to 78 percent; or the alloy powder prepared according to a certain alloy component ratio is directly used as a raw material; 2, forming the powder which is obtained by step 1 into a blank with a certain shape by using a powder metallurgy forming method; 3, sintering the formed blank, which is obtained by the step 2, under the pressure of between 0 and 1,000 MPa and at the temperature of between 600 and 1,500 DEG C for 10 to 4,000 minutes; and 4, processing the sintered body obtained by the step 3 under the pressure of between 0 and 4,000 MPa and at the temperature of between 600 and 1,600 DEG C for 0 and 4,000 minutes. The method has the characteristic that: by improving the sintering and thermal treatment systems, the material density is improved, the micro texture and structure of the material are improved, the impurity content is reduced, and the magnetically soft alloy product with the maximal magnetic conductivity of no less than 40 mH/m and with the coercive force of no more than 20 A/m can be prepared.

A full length mattress pad is provides improved patient support for all parts of the user's body through provision of a support surface supplement for use with existing support surfaces, such as for use on top of a conventional mattress or hospital bed. The pad has a body of resilient material having a relatively flat, planar lower surface for being received on top of the existing support surface, and has a length at least generally the same as that of the mattress, or at least long enough to support the full length of a user. An inclined upper surface is defined by the body of resilient material, and has a plurality of different longitudinal sections. The plurality of different longitudinal sections collectively define a predetermined angle of inclination for the inclined upper surface which is relatively constant along the entire length of the body of resilient material relative to its planar lower surface. At least one of the plurality of different longitudinal sections has a relatively flat surface inclined at the predetermined angle of inclination, while at least one other of the plurality of different longitudinal sections has a surface formed with respective or different projections therein, so that improved patient support is provided through a combination of the inclined upper surface and the plurality of different longitudinal sections. Preferably, the predetermined angle of inclination is no more than about 10°. Characteristics of the plurality of longitudinal sections are selected based upon one or more of the type of resilient material used, the thickness of such material, the change in thickness of such material due to the predetermined angle of inclination, the material density, and the indention load deflection characteristics of such material, with such selection and combination of characteristics determined so as to optimize the inclined pad for support for the user's body which is engineered on the basis of the intended end use of said mattress pad. The longitudinal sections are also formed by one or both of longitudinal and lateral cuts within a selected portion of the inclined upper surface, also preselected to address the relieving of support pressure points to decrease the chance of decubitus ulcers in users of the mattress pad. At least one of the depths, widths, and lengths of such cuts, forming cross-sectional shapes of the different or respective projections, are preselected on the basis of the intended end use of said mattress pad. A plurality of channels may be formed between adjacent of the respective projections, for dissipating heat and moisture from a user who is supported on the inclined upper surface, to increase the health and comfort of such user.

The invention relates to an electrochemical composite decomposition manufacturing method and an electrochemical composite decomposition manufacturing device of a laser light tube electrode. Solid pulse laser is changed into an annular hollow laser beam with central light strength as zero by a light beam modulating system; compression shock is generated for electrochemical deposition in a non-solid light tube electrode by utilizing annular laser to irradiate expansion of plasma; decomposition stress is removed, a cathode reaction gas is exhausted, and material density is improved; moreover, the deposition reaction is only generated on the light beam with central laser energy as zero, so that the electrochemical composite deposition processing, repairing and surface performance strengthening which are high in quality and good in locality are realized. The electrochemical composite decomposition manufacturing method and the electrochemical composite decomposition manufacturing device disclosed by the invention are suitable for processing, repairing and surface performance strengthening of micro high-performance metal components, and belong to the field of micro quick forming and processing.

The invention discloses a PVC (Poly Vinyl Chloride) wood-plastic foaming composite and a preparation method of the wood-plastic foaming composite. The PVC wood-plastic foaming composite comprises a PVC wood-plastic foaming base material layer and an ASA (Acrylonitrile Styrene Acrylate) layer which is co-extruded and formed on at least one side of the PVC wood-plastic foaming base material layer, wherein the PVC wood-plastic foaming base material layer comprises the following components in parts by weight: 100 parts of PVC, 50-100 parts of paddings, 1-1.5 parts of coupling agents, 5-7 parts of compound stabilizers, 1.0-1.5 parts of compound foaming agents and 6-8 parts of blowing promoters. The PVC wood-plastic foaming composite disclosed by the invention has the characteristics of light weight, high specific strength, water prevention, corrosion prevention, heat preservation, good weather resistance, low formula cost and low material density, and can be widely used in outdoor product markets such as exterior decoration of buildings, garden landscapes, fences, plank ways and the like.

In most construction processes, some quality assurance compaction test must be performed on a base material before further construction can take place on or relative to the compacted base material. In order to avoid costly downtime associated with waiting for a quality assurance test to be performed, the present invention contemplates generating compaction quality assurance data using on-board generated compaction quality control data. The quality control compaction data is based upon quantifying a sinkage deformation interaction between the compactor and the base material. The interaction might include monitoring an effective roller radius of the compactor, or an amount of energy transferred or consumed when the compactor moves over the base material, or even measuring a rut depth caused by the compactor. The compaction quality assurance data can be indicative of a proof rolling test result, a walk out test result, a penetrometer test result, a base material density test result, or possibly even a compactor sinkage into the base material.

A golf club grip includes a first grip member and a second grip member. The first grip member has a dark color and a first material density. The second grip member which has a light color and a second material density which is greater than the first material density, wherein the first grip member is integrated with the second grip member in an edge-to-edge manner to form an elongated tubular structure. When the first grip member and the second grip member is heated to integrate with each other, particles of the second grip member crosses over the first grip member to form a predetermined amount of light color at the first grip member, while the light color formed at the first grip member is adapted to be overlaid by the dark color so as to render the light color and the dark color sharply distinguishable on the gold club grip.

The present invention relates to a rechargeable lithium ion battery having an electrode plate with a high active material density and high electrolyte permeability. Upon producing the rechargeable lithium ion battery, hollow resin particles that can be collapsed by rolling are incorporated in a positive electrode mixture layer or a negative electrode mixture layer before the electrode mixture layer is rolled. The hollow resin particles are collapsed in the course of rolling the positive electrode mixture layer or the negative electrode mixture layer, so that the active material density can be easily increased. Further, the collapsed resin particles form unevenness on the surface of the electrode plate and also form open pores in the electrode plate, so that electrolyte permeability can be enhanced. As a result, the discharge capacity and rate characteristics of rechargeable lithium ion batteries can be increased.