174 results about "Elliptic cylinder" patented technology

A light guide plate that is divided into an effective section capable of providing uniform surface illumination and a transitional section between the effective section and the point light source includes a light-receiving surface, a light-emitting surface, a light-reflecting surface, and a plurality of light-diffusing structures. The light-diffusing structures are spread on the transitional section, and each light-diffusing structure is in the shape of a part elliptic cylinder having a long axis and a short axis and the front surface of the light-diffusing structure facing the point light source is a part elliptic cylindrical surface.

The invention discloses a traditional Chinese medicine pillow with active carbon. The traditional Chinese medicine pillow with the active carbon comprises a medicine pillow cover as well as a packaging layer, an active carbon layer and a traditional Chinese medicine layer which are arranged in the medicine pillow cover, wherein the active carbon layer consists of a double-layer breathable layer and active carbon particles filled in the double-layer breathable layer; the traditional Chinese medicine layer consists of a single-layer breathable layer and traditional Chinese medicine ingredients packaged in the single-layer breathable layer; the active carbon layer is of a cylindrical or elliptic cylinder hollow structure; the traditional Chinese medicine layer is arranged in the hollow structure; and the packaging layer is filled with a flexible and breathable material and packages the active carbon layer. According to the traditional Chinese medicine pillow with active carbon, the strong sorption capacity, a sterilization function, an oxidation resistance function, a negative ion release function and other functions of the active carbon and the health preserving function, health protection function, disease preventing and treating function of traditional Chinese medicines are combined into a whole, thereby providing a safe, comfortable and healthy medicine pillow for people.

The present invention provides a diffusing sheet, a surface light source device, and a transmission type display, that can attain uniform illumination so that the brightness of light on the display screen appears uniform regardless of the position from which the display screen is observed. A transmission type display 10 comprises an LCD panel 11, and a surface light source device 16 for illuminating the LCD panel 11 from its rear. The surface light source device 16 includes a plurality of cathode ray tubes 13 that are arranged in parallel. A diffusing sheet 14 and a convergent sheet 12 are placed between the cathode ray tubes 13 and the LCD panel 11 in the surface light source device 16. The diffusing sheet 14 includes, on its light-emerging side surface, a diffusion lens array 141. The diffusion lens array 141 has a plurality of unit lenses (the diffusion lens array 141 is formed by regularly arranged unit lens groups each constituted by arranging a lower unit lens 141a and a higher unit lens 141b), each unit lens being in a shape equivalent to a part of an elliptic cylinder having an elliptical section. The convergent sheet 12 has a plurality of unit lenses 121 having almost trapezoidal cross sections, formed on its surface on the cathode ray tubes 13 side. It is therefore possible to attain uniform illumination by diffusing light from the cathode ray tubes 13 in the surface light source device 16. At the same time, it is possible to converge the light serving as backlight to enhance optical efficiency.

A cell such as a nonaqueous electrolytic secondary cell includes a plurality of power-generating elements which each include a strip-like positive electrode and a strip-like negative electrode that are both wound into an elliptic cylinder with a separator being interposed therebetween, where each power-generating element has a peripheral face including at least a flat portion. The cell also includes a cell case for housing the power-generating elements, where the cell case has an opening, and a cover hermetically sealing the opening of the cell case. The flat portion of each power-generating element is superposed on the flat portion of the adjacent power-generating element, and a sheet member is wound around peripheries of the superposed power-generating elements to fasten the power-generating elements such that the power-generating elements are integrated.

A surface light source device including a light source unit having a plurality of light-emitting sources in a two-dimensional direction, and a lenticular lens sheet having a plurality of unit lenses, each of which is a part of a substantially elliptic cylinder, such that lens surfaces of the unit lenses face a light emergent side. There is a particular relationship between an interval at which the light-emitting sources are arranged in the same direction as an arrangement direction of the unit lenses, an interval between the light emitting sources and a rear surface of the lenticular lens sheet, a unit-lens end-portion angle, and the refractive index of the material of the lens sheet.

The invention relates to a method for preparing superfine phenolic fibre, comprising the following steps of: firstly, preparing commercially available soluble phenolic resin with low molecular weight (Mw)of 500-3000 into organic solution containing 10-40wt% of soluble phenolic resin; secondly, adding high molecular weight linear polymer into the solution and stirring until the high molecular weight linear polymer is completely dissolved, wherein mass ratio of the high molecular weight linear polymer to the soluble phenolic resin is 1: (20-100); and thirdly, carrying out electrostatic spinning on the solution to obtain the superfine phenolic fibre and a phenolic fiber felt, wherein relative humidity RH of an electrostatic spinning experiment is 15-55%, and the obtained superfine phenolic fibres can be cylindrical, elliptic cylinder-shaped and belt-shaped. Aiming at the characteristic that low-molecular-weight phenolic resin can be easily melted, the invention provides a non-constant-speed stepped heating and curing process, and curing time is shortened under the condition that the fibers are fully crosslinked and are not melted.

The invention relates to a radiator for a concentrating photovoltaic photoelectric-converting receiver, and belongs to the technical field of solar power generation. The radiator comprises primary heat-radiating fins, secondary heat-radiating fins, a radiator soleplate and a concentrating photovoltaic photoelectric-converting receiver installing area, wherein one surface of the radiator soleplate is provided with a primary heat-radiating fin array and secondary heat-radiating fin arrays in two different shapes, and the other surface of the radiator soleplate is provided with the concentrating photovoltaic photoelectric-converting receiver installing area. The radiator disclosed by the invention has the advantages of simple structure and low manufacturing cost; natural wind can be guaranteed to enter the inner part of the radiator as much as possible through the surrounding arrays of the secondary heat-radiating fins of the radiator; the natural wind can be refracted in different directions at the inner part of the radiator when acting on the internal cylinder or elliptic-cylinder arrays of the secondary heat-radiating fins, and meanwhile, hot air at a higher level is brought to staggered heat-radiating arrays at a lower level in the mode of airflow flowage, so that the natural wind entering the heat-radiating fins is guaranteed to bring more hot air in the radiator to the air outside the radiator to be exchanged through many times of refraction and circulation, and therefore the heat radiation and the cooling for the radiator are guaranteed to be furthest carried out through the natural wind.

The invention relates to a moisture-retention microneedle matrix array surface bioelectric electrode.The moisture-retention microneedle matrix array surface bioelectric electrode comprises an electrode body, a signal processing module, a heat-transfer insulating thin film layer and an ultra-thin hook and loop fastener or a self-attachment thin film and is constructed through a 3D or die casting mode.The electrode body is a hollow cylinder or elliptic cylinder and is internally provided with a cavity used for storing liquid electrolyte, a solid or hollow microneedle array is distributed on the upper surface of the electrode body, a series of micropores are formed between microneedles, the surface of the electrode body is plated with silver, gold or platinum and other conductive metal through a chemical plating method, an electrochemical deposition method, a vacuum evaporation method or a magnetron sputtering method or other methods, the back side of the electrode body is provided with the signal processing module provided with a voltage follower, and a voltage follower circuit is encapsulated by heat-transfer insulating glue and attached to the ultra-thin hook and loop fastener or the self-attachment thin film.The moisture-retention microneedle matrix array surface bioelectric electrode has the denoising and moisture retention functions, and improves stability of bioelectric signal acquisition.

A passive heat-reduction and drag-reduction device and method for a high-velocity flow-around boundary layer. A plurality of rough belts are arranged on the surface of an aircraft to achieve passive heat reduction and drag reduction of the high-velocity flow-around boundary layer of the aircraft. Under the condition of high-velocity flows, the flow-around characteristic, near the wall surface (namely, in the area that the Mach number >= 3.5 and the distance to the wall surface <= 0.3 times the nominal thickness of a local boundary layer), of the high-velocity boundary layer is utilized to propose new principles of delayed heat transition in a laminar flow area and heat reduction and drag reduction in a turbulent flow area. The use of elliptic cylinders, quasi-prisms or rectangular columnscan produce a stable trailing vortex structure and isolated roughness elements of which the height <= 0.3 times the nominal thickness of the local boundary layer so as to achieve the functions of thedelayed transition in the laminar flow area and the heat reduction and drag reduction in the turbulent flow area. The passive heat-reduction and drag-reduction device and method for the high-velocityflow-around boundary layer can effectively reduce the energy consumption and the heat protection pressure of the aircraft and improve the endurance ability and payload of the aircraft under the condition that the flight Mach number >= 3.5 and without changing the appearance of the aircraft, applying additional energy or increasing additional equipment.

An optical system is disclosed. The optical system comprising: a substrate; and a subwavelength photonic crystal waveguide atop the substrate, wherein the subwavelength photonic crystal waveguide comprises a periodic one or two-dimensional array of two or more interleaved dielectric pillars; wherein the periodicity of the one or two-dimensional array is constant, a combination of two or more periods, or random; wherein the one or two-dimensional array is substantially linear or curved; wherein each of the pillars of the one or two-dimensional array is at least one of a triangular prism, a trapezoidal prism, an elliptic cylinder, a cylinder, a tube, a frustum, a pyramid, a trapezoidal prism, and an asymmetric frustum; and wherein each of the pillars of the one or two-dimensional array comprises a solid, liquid, and/or gas. Other embodiments are described and claimed.

The invention provides a central type tendon anastomat which comprises a body part (3), two suture lines (2) and two suture needles (1), wherein the body part (3) is in a long strip structure made of a degradable biomaterial, the middle section of the body part (3) is an elliptic cylinder, and both ends of the body part (3) are elliptic cones; one ends of the two suture lines (2) are respectively connected with both ends of the body part (3), and the other ends of the two suture lines (2) are respectively connected with the tail parts of the two suture needles (1). The central type tendon anastomat can always provide sufficient stretching resistance during the tendon healing period so that rehabilitation activities can be started immediately without braking, after a tendon repair operation, synechia between the tendon and tendon surrounding tissues is avoided, the quality and the strength of tendon anastomosis are greatly improved, and a second operation is omitted.

The invention discloses a magnetic device applicable to anastomosis of large vessels. Two elliptic-cylinder-shaped anastomosing rings which correspond to the pipe diameter of the large vessels to be anastomosed and contain permanent magnets are utilized to finish anastomosis of the vessels with different pipe diameters; the opposite surfaces of two permanent magnet anastomosing rings are smooth and polished, so that the endangiums of the vessels are neatly aligned, and further the defects of narrow anastomosing ports, blood leakage, and various complications such as massive haemorrhage, local tissue granuloma and pseudoartery formation and the like due to slipping of ligatures caused by manual suture for anastomosis are avoided; as the anastomosing rings are designed to be elliptic-cylinder-shaped, clamping and fixing with surgical instruments in surgery are convenient, and the magnetic device is very beneficial to anastomosis operation of the large vessels at deep parts of the body cavity; and the time of utilizing the anastomat to carry out anastomosis on the large vessels is more than five times shorter than that of manual anastomosis, so that the condition that the blood of tissues and organs are blocked for long time so as to cause ischemic operation of the organs or congestion and edema and further cause dysfunction of the organs. In addition, the end surface adopts conical titanium alloy needles and corresponding conical small holes so as to be beneficial to tight alignment of the anastomosing ports in surgery.

The invention relates to a technology of preparing special-shaped cutting steel wire, comprising the following steps: (1) coarse wire drawing, during which step the steel wire rod of Phi5.5-6.5mm is drawn into the steel wire of Phi2.80-3.25mm, (2) middle filament heat treatment, (3) intermediate drawing, during which step the steel wire of Phi2.80-3.25mm is drawn into the steel wire of Phi 0.76-1.15mm, (4) wet drawing, during which step the steel wire of Phi0.76-1.15mm is drawn into the steel wire of Phi0.08-0.3mm, (5) press rolling, during which step the steel wire is rolled into the steel wire having a cross section of polygon or ellipse, (6) electroplate/bonding, during which step SiC or diamond particle abrasive is fixed upon the external surface of the steel wire in an electroplating or glue-bonding manner, and (7) taking up, during which step the finished product is obtained. The preparing technology of the invention is simple, environment-friendly, efficient, and of low cost. The cutting steel wire prepared via this technology takes the shape of elliptic cylinder or polygon body, with hardness and tensile strength substantially improved, effectively decreasing the wire-broken rate, accelerating cutting speed of steel wire, and improving the cutting efficiency.

The invention provides a spinal cord micro-catheter stent fast to form. The spinal cord micro-catheter stent comprises a micro-catheter stent body in an elliptic cylinder shape. A hollow area used for allowing corticospinal tracts, fasciculus gracilis, fasciculus cuneatus and spinothalamic tracts to grow is arranged in the micro-catheter stent body. The outer diameter of the spinal cord micro-catheter stent body is 2.5 mm-3.5 mm, and the wall thickness of the micro-catheter stent body is 0.1 mm-1.0 mm. The size and the microscopic structure of a model are designed according to the electrophysiology structure and the exquisite position of natural nerves of the spinal cord, the low-temperature fast forming printing technology is adopted for accurately printing the fine structure of a patient, and the stent can be used for treatment and research on spinal cord injuries.

The invention discloses a novel sit-washing device for the gynecology department. The novel sit-washing device comprises a supporting plate. Two connecting columns are arranged on the two sides of the upper surface of the supporting plate. A washing base is arranged at the upper ends of the connecting columns. The washing base is of an elliptic cylinder structure. A washing shell is arranged on one side of the washing base. A sliding rail is arranged in the washing shell, a linear motor is arranged on the sliding rail, and a connecting frame is arranged on one side of the linear motor. Washing liquid in a liquid containing box can be extracted into a flushing frame through a water suction pump, a patient in the gynecology department can be washed through the flushing frame, flushing is more convenient, the linear motor drives a washing head to move to wash the private part of the patient in the gynecology department, and then washing is more convenient. The novel sit-washing device for the gynecology department is simple in structure and easy and convenient to operate, the patient can wash the private part in a sitting mode, an electric appliance can drive the washing device to carry out washing, convenience is brought for medical staff, and meanwhile the patient is more conveniently washed.

The invention discloses a displacement detecting device based on an inner reflector of an elliptic cylinder. In the device, a convex lens imaging principle is skillfully applied; the detection of the position of a light convergence point is converted into the detection of the most photosensitive point on an linear array photosensitive element by a photoluminescence substance (or a diffuse reflectance material), the inner reflector of the elliptic cylinder and the linear array photosensitive element; and the detection can be carried out only by a computer. The device comprises a point light source laser, a convex lens, the inner reflector of the elliptic cylinder and the linear array photosensitive element, wherein the point light source laser and the inner reflector of the elliptic cylinder are put on the same side of the convex lens; the photoluminescence substance (or the diffuse reflectance material) is coated on a focal line of the inner reflector of the elliptic cylinder; the focal line is superposed with an optical axis of the convex lens; and the linear array photosensitive element is put on the other focal line of the inner reflector of the elliptic cylinder for detecting the displacement of a surface to be detected. The device has the advantages of simple structure, convenient use and high measurement precision.

The invention relates to a feed network-based low-frequency compact range feed source, which comprises an ultra-broadband orthogonal dipole antenna (1), a feed network (2), a reflective plate (3), an elliptic cylinder opening surface (4), a support structure (5), a flange plate (6) and a wave-absorbing material (7). The feed source constructs a relatively stable feed source radiation pattern by the elliptic opening surface with a specific length-width ratio, and achieves the characteristics of relatively large 3dB beam width of a horizontal direction pattern and relatively small 3dB beam width of a vertical direction pattern on two different incident polarizations. By introducing a broadband feed network, the length of a feed source horn is greatly reduced. Ultra-broadband oscillators are excited through the feed network; and <e>TE<11> and <o>TE<11> modes with higher mode purity are excited. A support post with a certain length is configured behind the horn antenna of the feed source; the opening surface of the horn antenna is far away from a feed source bracket; a wave-absorbing material with a specific size is added to the bottom part of the support post; and multiple radiation caused by a complicated metal structure of the feed source bracket is inhibited. The feed source mainly works at a low frequency; and the specific frequency range is (300MHz-500MHz).

The invention discloses a ship body stabilizing and decelerating device. The device consists of a stabilizing fin, a rotating shaft, a motor and a turntable, wherein the stabilizing fin adopts an elliptic cylinder structure; the center of one end surface is connected with the rotating shaft; the axis of the elliptic cylinder and the rotating shaft are positioned on one straight line; the rotating shaft is connected with the motor; the motor is mounted on the turntable; and the turntable is connected with another motor. The ship body stabilizing and decelerating device has such advantages as delicate structure and convenience for use.