111 results about "Light particle" patented technology

This invention concerns an improved particulate composition for delivering a drug to the pulmonary system. Applicants disclose a method of identifying an optimal form of aerodynamically light particles which are highly dispersible. The particles of the instant invention are made by creating hollow, spherical drug particles (i.e., progenitor particles) that collapse in the process of particle formation, leading to wrinkled, thin-walled drug particles of very low envelope density. Additionally, Applicants have found that such particles are especially optimal for inhaled aerosols when the surface area parameter (σ) is greater than 2, optimally greater than 3.

The present invention discloses an interactive IR electronic white board, around which is an infrared emitting and receiving array. An output port of a column driver of emitting array is connected to high frequency modulating signal generator, and an output port of a column driver of the receiving array is connected to a microprocessor through a signal receiving circuit and an analog-digital converter A/D. The emitting array and the receiving array are connected to emitting and the receiving driver through emitting and receiving driver lines, and the emitting driver and the receiving driver are connected with the microprocessor through address bus. The present invention utilizes the Inverse Square Law of optical theory and the linear direct ratio relation between the quantity change of light particles received by an infrared receiving diode and the output voltage of the receiving diode to associate the output voltage of the receiving diode with the interrupted width of the infrared light path, so that it can calculate the coordinate of interrupter accurately and improve the resolution of infrared scanning. The present invention can not only distribute pens or erase, but can be used by plurality of users at the same time as well.

Improved aerodynamically light particles for delivery to the pulmonary system, and methods for their preparation and administration are provided. In a preferred embodiment, the aerodynamically light particles are made of a biodegradable material and have a tap density less than 0.4 g/cm³ and a mass mean diameter between 5 μm and 30 μm. The particles may be formed of biodegradable materials such as biodegradable polymers. For example, the particles may be formed of a functionalized polyester graft copolymer consisting of a linear α-hydroxy-acid polyester backbone having at least one amino acid group incorporated herein and at least on poly(amino acid) side chain extending from an amino acid group in the polyester backbone. In one embodiment, aerodynamically light particles having a large mean diameter, for example greater than 5 μm, can be used for enhanced delivery of a therapeutic or diagnostic agent to the alveolar region of the lung. The aerodynamically light particles optionally can incorporate a therapeutic or diagnostic agent, and may be effectively aerosolized for administration to the respiratory tract to permit systemic or local delivery of a wide variety of incorporated agents.

The invention belongs to the field of preparation of soft-light bricks, and particularly relates to 12-degree soft-light porcelain glaze facing bricks. Each 12-degree soft-light porcelain glaze facingbrick comprises a green body, a ground glaze and a facing glaze, wherein the facing glaze is prepared from potassium feldspar, burnt talc, barium carbonate, calcined alumina, calcined zinc oxide, calcined kaolin, kaolin, matte frit, transparent frit and forging light particles. The green body of the soft-light porcelain glaze facing brick is low in water absorption rate (0.05 to 0.1 percent); therupture modulus is large (40 to 45 MPa); a green brick is high in intensity, and is not easy to break; the edge bending curvature (-0.03 to +0.05 mm) and the central bending degree (-0.04 to +0.06 mm) are extremely small; the brick surface is flat, so that the bricks look tidy and attractive after being paved. The soft-light bricks promote a light pollution-free healthy atmosphere; according to the spatial optical refraction rule, light reflected by the bricks is controlled horizontally at 12-degree soft light, so that the spatial light sensation is moderate in brightness and darkness, the most comfortable light sensing state is created for eyes, and the potential fatigue hazard is avoided.

The invention belongs to the technical field of artificial boards, and relates to production of particle boards, in particular to a production method of a light particle board. The production method of the light particle board comprises the steps of: shaving preparation, drying, glue stirring, pavement, prepressing and hot pressing; a surface layer adopts common wood fine shavings; core layer shavings are corn straw shavings and pennisetum alopecuroides straw shavings; and the hot pressing process is to hot press a prepressed board blank at a temperature of 170-190 DEG C under a pressure of 2.5-3.5 MPa for 3-6 min. Light materials are used as raw materials; and a production process is improved to produce the light particle board. Based on a traditional particle board production process, the core layer shavings are changed from common wood shavings to the corn straw shavings and the pennisetum alopecuroides straw shavings with lower density and bulk density; MDI resins are added in a core layer; and the use level of MUF resins is reduced to reduce influence on the board density by adhesive and to improve overall board physical performances. The light particle board, whose density iswithin 0.38-0.50 g/cm3 and physical and chemical indexes both meet national standard requirements, can be manufactured by the production method.

Through building the model of light particle distribution density in the optical axis channel, using the relation between the reduction of the light particle density caused by shelter from the blocking object and the output voltage variety of the receiving tube, based on the voltage variety generated when the moving object passing through optical axis channel, the quadratic function curve or exponential, logarithmic curve equation are created. The specific position or coordinate lambda of the block object passing through optical axis channel can be obtained by the known voltage. By applying the method, the resolution of the infrared capture is increased greatly so as to realize the technique of capturing the handwriting script by using infrared accurately and smoothly.

In one aspect, matching layers for an ultrasonic transducer stack having a matching layer comprising a matrix material loaded with a plurality of micron-sized and nano-sized particles. In another aspect, the matrix material is loaded with a plurality of heavy and light particles. In another aspect, an ultrasound transducer stack comprises a piezoelectric layer and at least one matching layer. In one aspect, the matching layer comprises a composite material comprising a matrix material loaded with a plurality of micron-sized and nano-sized particles. In a further aspect, the composite material can also comprise a matrix material loaded with a plurality of heavy and light particles. In a further aspect, a matching layer can also comprise cyanoacrylate.

The invention relates to a novel material, and belongs to the technical field of building materials. A self-insulation material of light particle and fiber concrete series is disclosed. Sealed waterproof light particles and fine short fibers are mixed into concrete. The invention effectively solves the problem that novel building materials such as aerated concrete and foam concrete are high in water absorption rate, low in strength and easy to crack. Because the self-insulation material of light particle and fiber concrete series contains sealed waterproof light particles and fine short fibers, the material has obvious effects of light weight, high strength, sound insulation, crack resistance, etc., can be prefabricated and cast into various blocks and plates, or cast to mould by shipping in a canned car on site, can be widely used as the materials for self-insulation outer walls, various walls with retaining filling structures and roofing, has a good energy saving effect, conforms to national industrial policies of low carbon and environmental protection, and helps to promote the improvement of energy conservation and environmental protection building materials.

The invention relates to an annular fluidized bed separator of a particle mixture. The upper end of a center lifting pipe extends into an annular fluidized bed by a certain height, so that the annular fluidized bed is divided into an annular area at the lower part and a cylindrical area at the upper part; an air inlet and a wind distribution plate are respectively arranged at the bottoms of the center lifting pipe and the annular fluidized bed; a feed port is formed in the bottom of the center lifting pipe; a heavy particle outlet is formed in the bottom of an annular area of the annular fluidized bed, and is connected with a heavy particle collecting tank; and an airflow outlet at the top of the annular fluidized bed is connected to a light particle collecting tank by a cyclone separator. The particle mixture is quickly fluidized in the center lifting pipe for primary dispersion, and is ascended along with air currents to enter the annular fluidized bed for secondary dispersion. The annular fluidized bed separator can continuously and quickly perform high-efficiency separation for light and heavy particle mixtures under the condition of normal temperature or high temperature. The annular fluidized bed separator can be coupled with a circulating fluidized bed reactor system, and can continuously and stably operate.

The invention belongs to the technical field of deep space detection and discloses a large-area spiral cylindrical double-sided silicon drift detector and a design method thereof. The design method for the large-area spiral cylindrical double-sided silicon drift detector comprises the following steps of determining electric potentials of the front surface and the rear surface of the silicon driftdetector; calculating an optimal drift path from a point S1 to a point S2 for a carrier during drifting in the silicon drift detector by adopting a mathematical variation method; determining a constant drift electric field of the optimal drift path; and calculating width distribution of a spiral negative electrode of the silicon drift detector. According to the method, through analysis on a carrier drift behavior law and heavily doped electrode growth of the SSD, starting from a new structure, a novel process integration design and a light particle theory calculation method, a double-sided electrode having a double-sided correlation effect and capable of keeping an uniform electron drift electric field and providing a smooth drift trajectory is designed, and an innovative design and manufacturing mode of the efficient collection SDD with high energy resolution of soft X-ray particles with the intensity of 0.5-15keV is established.

The invention relates to a pipe string capable of carrying out light particle filling and sand prevention and water control production. The pipe string comprises a filling packer, a filling conversiondevice, self-adaptive flow adjustment water controlling screen pipes and a pipe plug. When a filling tool is inserted into the filling conversion device and open the filling conversion device, filling liquid carrying light particles in the filling tool can enter the annular space between the self-adaptive flow adjustment water controlling screen pipes and a casing pipe under the guidance of the filling tool, wherein the annular space is filled with the light particles, and the filling liquid penetrates into the self-adaptive flow adjustment water controlling screen pipes and enters the annular space between the filling tool and the casing pipe under the guidance of the filling conversion device through a backflow gap between the filling tool and the filling packer. The pipe string can fill the annular space between the self-adaptive flow adjustment water controlling screen pipes and the casing pipe with the light particles to solve the difficulty of particle flow back in the later stage, and can realize sand prevention and water control with outstanding effect in the later stage of oil production and the oil production efficiency of the pipe string is improved.

The invention belongs to the technical field of powder processing and utilizing and provides a particle classification device and a method thereof. The middle of the top of a barrel body of a cyclone separator is connected with the inlet end of a tail air outlet pipe, and the inlet end does not stretch into the cyclone separator; the outlet end of the tail air outlet pipe is connected with a fine/light particle set collector; the lower middle portion of the barrel body of the cyclone separator is provided with a primary air inlet pipe; the bottom of the barrel body of the cyclone separator is of a conical structure, and is connected with the top of a sedimentation classifier; the bottom of the sedimentation classifier is connected with a coarse/heavy particle set collector; and the lower portion of the sedimentation classifier or the coarse/heavy particle set collector is provided with a secondary air inlet pipe. Based on the differences of the centrifugal forces and the terminal speeds of coarse/heavy particles and fine/light particles in mixed particle size/density particle materials, the air speeds of primary air and secondary air are adjusted, it can be achieved that the cutting particle size is flexibly adjusted and changed, and the classification precision is high; and operation is easy and convenient, the structure is simple, and the particle classification device and the method thereof can be applied to the normal temperature/high temperature particle classification environment.