59results about How to "Good angle stability" patented technology

An implant for osteosynthesis, for example a bone nail, has an implant body which has at least one bore with a threaded portion and a bone screw which engages the thread when it is threaded into a bone for the fixation of the implant body. The threaded bore has an annular groove the diameter of which is larger than the thread outer diameter, and which receives a ring of a deformable material with an inner diameter which is smaller than the outer diameter of the thread of the bone screw so that the ring extends partially into the bore.

The present invention relates to a substrate bearing a solar-control multilayer stack, and to a multiple glazing unit and to a laminated glazing unit incorporating at least one such substrate bearing a solar-control stack.The multilayer stack comprises three functional films, each film, starting from the substrate, being thicker than the preceding one, and four transparent dielectric coatings. The ratio of the optical thickness of the third dielectric coating, to the optical thickness of the final dielectric coating, lies between 2 and 3.2, and the ratio of the optical thickness of the third dielectric coating, to the optical thickness of the second dielectric coating, is either between 0.6 and 0.91 or between 1.15 and 1.7.The invention is applicable, in particular, to production of high-selectivity solar-control glazing units.

Narrow aerial and die-mount cams, each having a cam adapter, a driver and a slide sandwiched between the cam adapter and driver. The narrow aerial cam slide has an elongate primary portion that has a T-shaped cross-section and has a primary bearing surface, and the cam adapter has a rectangular recess. An elongate keeper plate having a longitudinal slot is secured to each side of the cam adapter adjacent the rectangular recess to slidably retain the primary portion of the slide within the longitudinal slots and the rectangular recess. The primary bearing surface and a pair of intermediate bearing surfaces formed in the slide below the primary portion slidably support the keeper plates and thus the cam adapter. The driver slidably supports the slide. The narrow die-mount cam is basically an inverted version of the aerial cam.

A cellulose ester film containing a polyester represented by Formula (1) or (2), wherein an in-plane retardation value (Ro) is 0 to 5 nm and a retardation value in a thickness direction (Rt) is −20 to 10 nm, Ro and Rt being measured at 23° C. and 55% RH: B1-(G-A-)mG-B1  Formula (1) wherein B1: monocarboxylic acid, G: dihydric alcohol, A: dibasic acid, B1, G and A contain no aromatic ring, m: repeat number, plural B1 may be the same or different, and plural G may be the same or different; and B2-(A-G-)nA-B2  Formula (2) wherein B2: monoalcohol, G: dihydric alcohol, A: dibasic acid, provided that none of B2, G and A contains an aromatic ring, n: repeat number, plural B2 may be the same or different, and plural G may be the same or different.

The invention discloses a multifunctional active frequency selective surface and a control method thereof. The active frequency selective surface comprises a dielectric substrate and two metal periodic arrays arranged orthogonally on the upper side and lower side of the dielectric substrate; each metal periodic array comprises a plurality of metal units in periodic array distribution; and each metal unit is square and includes two metal thin wire structures, two metal thick wire structures and a PIN diode. When the multifunctional active frequency selective surface works, direct-current bias voltage excitation is applied to the upper-layer metal periodic array and the lower-layer metal periodic array so as to carry out encoding; and one of an electromagnetic switch function and a polarization selection function can be realized by changing encoding states, so that the multi-functional active frequency selective surface can be in a double-polarized band-pass state, a double-polarized shielding state, a TE polarized wave selection state or a TM polarized wave selection state. The multifunctional active frequency selective surface of the invention integrates many functions, is simple in manufacture, has good angle stability, can actively control electromagnetic waves and has a bright application prospect.

The invention discloses a broadband wave-absorbing frequency selection surface, and the surface comprises an upper dielectric plate and a lower dielectric plate, wherein an air layer is arranged between the upper dielectric plate and the lower dielectric plate, the surface of the upper dielectric plate is provided with periodically arranged double-ring metal patches, both the inner square ring metal patch and the outer square ring metal patch are loaded with resistors, and the lower dielectric plate is a metal plate. The problems that an existing wave absorber is large in thickness and narrowin wave-absorbing frequency band can be effectively solved.

The invention discloses a top-emitting organic electroluminescent device based on a semi-transparent composite negative electrode and a preparation method for the top-emitting organic electroluminescent device, and belongs to the technical field of organic electroluminescence. The top-emitting organic electroluminescent device consists of a substrate, a metal positive electrode, an organic functional layer, a negative electrode and a light taking-out layer, wherein the organic functional layer sequentially comprises a hole transmitting layer, an electronic barrier layer, a luminous layer and an electronic transmitting layer. The top-emitting organic electroluminescent device is characterized in that the negative electrode has a metal / semiconductor / metal composite structure; a metal material is gold or silver; and a semiconductor material is germanium. Only the material of the luminous layer is changed; under the same thickness of the organic layers, the top-emitting organic electroluminescent device which is high in performance and has four colors of red, green, blue and white can be obtained; and furthermore, the emitting spectrum of the device with the semi-transparent electrode is extremely high in angle stability.

The invention discloses a reflecting plate based on frequency selection surface units. The reflecting plate is mainly used for solving the problems that an existing reflecting plate is relatively large in size, cannot be applied to antennae with smaller sizes and cannot reduce the antenna radar cross section in a multi-angle manner. The reflecting plate comprises Z frequency selection surface units (1) and a base plate (2), wherein Z is larger than or equal to 4; the Z frequency selection surface unit are uniformly distributed on the surface of the base plate in a rectangular array; each frequency selection surface unit consists of four pasters; each paster (11) comprises a rectangular trunk (111) and n arc-shaped branch knots (112), and the n arc-shaped knot are alternatively arranged on two sides of the rectangular trunk; and the four pasters respectively rotate 90 degrees, 180 degrees and 270 degrees by utilizing the bottom left corners of the pasters as centers, so as to form a crossed distribution structure of the four pasters. According to the reflecting plate, the electric size of each frequency selection surface unit is prolonged, the space is fully utilized, the resonant frequency is reduced, and the reflecting plate can be applied to the antennae with smaller sizes and can be used for reducing the antenna radar scattering cross section in a multi-angle manner.

The invention discloses a double-passband frequency selective surface based on a high-dielectric low-loss all-dielectric metamaterial. The double-passband frequency selective surface comprises two layers of microwave ceramic structures and an air layer clamped between the two layers of microwave ceramic structures. Each microwave ceramic structure is composed of a microwave ceramic substrate of an etched cross-shaped flower-type pore structure and a cylindrical dielectric resonator, wherein the cylindrical dielectric resonator is installed in the center of the cross-shaped flower-type pore structure, and the thickness of the cylindrical dielectric resonator is the same as that of the microwave ceramic substrate. The microwave ceramic substrate is made of high-dielectric low-loss microwave ceramic materials. A pore opening period unit is of a cross-shaped flower-type pore structure, and the band-pass characteristics of the FSS can be expanded and optimized by adjusting the dielectric resonator in the center of the unit structure. By the adoption of the all-dielectric microwave ceramic design, the double-passband frequency selective surface contains no metal materials and has the advantages of being low in loss, high in power capacity, resistant to high temperature and the like; the dual-band gating characteristics within the Ku wave band can be achieved, and the double-passband frequency selective surface has the polarization insensitivity and the good angle stability.

The invention discloses a bone connecting device for treating femoral neck fracture. The bone connecting device comprises a bone connecting plate, wherein the bone connecting plate comprises a bone connecting plate upper part and a bone connecting plate lower part which are connected in sequence; the bone connecting plate upper part is outwards and obliquely arranged at the upper end of the bone connecting plate lower part, and the middle of the bone connecting plate is thicker than the two ends of the bone connecting plate; the bone connecting plate upper part is provided with three sleeves arranged in an invertedly triangular manner, and hollow screws are arranged in the sleeves; threads are formed in the front ends of the hollow screws, and no threads are formed in the rear parts of the hollow screws; during use, the hollow screws are obliquely arranged in the femoral head through the femoral neck from the greater trochanter; the threads are fixed in the femoral head, the rear parts of the hollow screws are connected with the femoral neck and the sleeves in a sliding manner, and locking screw holes locked with fixing screws in a thread manner are formed in the bone connecting plate lower part. Therefore, the fracture part can be pressurized in a femoral neck healing process, the fracture line is reduced, the blood supply rebuilding of the femoral neck fracture end becomes possible, the angular stability is relatively good, the fracture displacement can be prevented, and the occurrence rate of femoral head necrosis is reduced.

The invention relates to a dual-band reconfigurable frequency selection surface and a control method thereof, which relates to the technical field of electromagnetic metamaterials. The present invention includes a dielectric substrate and a closure unit structure on an upper side of the dielectric substrate. The closed cell structure consists of four PIN diodes and four metal opening cells extending periodically in horizontal and vertical directions. The metal opening element is square and comprises two short-line structures and two long-line structures, wherein, the two long-line structures are connected with each other and perpendicular to each other, and the long-line structure and the short-line structure are parallel to each other; the four lines have the same thickness d and constitute four sides of the metal opening unit. The PIN diodes can be oriented counterclockwise / clockwise and are connected to the metal opening unit at both ends. By changing the switching state of the PINdiode, the frequency selection surface is in a reconfigurable state. The invention has the advantages of simple structure, easy processing and realization, reconfigurable function and double-wave bandfiltering, and has good application prospect.

The invention discloses a bone connecting device for treating femoral intertrochanteric fracture. The bone connecting device for treating femoral intertrochanteric fracture comprises a bone connecting plate, a circular knife and fixing screws, wherein the bone connecting plate comprises a bone connecting plate upper portion, a bone connecting plate middle portion and a bone connecting plate lower portion which are sequentially connected to one another; the bone connecting plate upper portion is arc-shaped; the bone connecting plate middle portion is obliquely arranged at the lower end of the bone connecting plate upper portion; the outer side of the bone connecting plate middle portion and the outer side of the bone connecting plate lower portion are straight; the bone connecting plate middle portion is thicker than the bone connecting plate upper portion and the bone connecting plate lower portion; a sleeve is arranged on the bone connecting plate middle portion; threads are arranged at the front end of the circular knife; and the rear of the circular knife does not have threads. When the bone connecting device is used, the circular knife is obliquely placed in a femoral head via a femoral neck from a greater trochanter, the threads of the circular knife are fixed in the femoral head, and the rear of the circular knife is slidably connected with the femoral neck and the sleeve; and the bone connecting plate upper portion and the bone connecting plate lower portion are provided with locking screw holes which are locked with the fixing screws in a threaded manner. By the mode, a fracture portion can be compressed, and a fracture line is reduced; and angular stability is high, displacement fracture can be prevented, injury is reduced, and healing on femoral intertrochanteric fracture is facilitated.

The invention discloses a strong coupling frequency selective surface structure insensitive to all angles of incident electromagnetic waves. The strong coupling frequency selective surface structure comprises a plurality of tightly-arranged periodic unit structures, and each periodic unit structure comprises top and bottom layer metal patches, a dielectric plate, an upper half metal via hole and alower half metal via hole; the top and bottom metal patches are respectively attached to the upper and lower surfaces of the dielectric plate and are stereosymmetrically arranged around the center ofthe dielectric plate; each of the top and bottom layer metal patches is formed by connecting a circular patch and a rectangular patch; the circular patches are arranged in the center of the surface of the dielectric plate, the half metal via holes are located in the middle of the upper / lower edge of the surface of the dielectric plate, and the circular patches and the half metal via holes are connected through the rectangular patches. The strong coupling frequency selective surface structure is suitable for frequency selective surface design with ultra-small and ultra-thin structures and wideincident angle stability, the unit size and thickness are extremely small, and the resonant frequency is stable and unchanged within the incident angle range of 0-88 degrees.

The invention discloses a narrowband bandpass frequency selective surface. The frequency selective surface is formed by periodically arranging a plurality of same unit structures, and each unit structure comprises a square metal cylinder and a square dielectric block. Two identical Jerusalem metal cross-shaped part are engraved in the upper surface and the lower surface of the square dielectric block respectively, and the middle layer is a square metal plate with four identical rectangular apertures. The upper surface resonance structure and the lower surface resonance structure of the unit structure generate an electromagnetic coupling effect through the rectangular aperture of the middle layer, two transmission poles are generated, and a flat passband is formed. Meanwhile, two transmission zeros are introduced out of the right side of the passband, so that the filter has high frequency selectivity and wide out-of-band rejection. Meanwhile, the frequency selective surface has good angle stability in a dual-polarization mode.

This is a magnetic actuator including a mobile magnetic portion (20), a fixed magnetic portion (10) provided with at least two attraction areas (11, 12) for the mobile magnetic portion (20), and means (30) for triggering the displacement of the mobile magnetic portion (20), the mobile magnetic portion (20) being in levitation when it is not in contact with an attraction area (11, 12). The mobile magnetic portion (20) includes a magnet-based part (200) with reduced magnet weight, this part (200) having an overall volume, and a mass which is less than the one it would have if its overall volume was totally occupied by the magnet.

A one-piece piston having an investment or other permanent or non-permanent mold / die precision cast piston crown, rod flange and piston skirt. The piston crown has a relative constant thickness, a flange requiring minimal machining and a skirt providing for a wall with a support against the angular shifting of the piston. This improves the distribution of heat within such crown and the angular stability of the piston wall at the piston rod connection.

An insulating glass (IG) window unit including first and second glass substrates that are spaced apart from each other. At least one of the glass substrate has a triple silver low-emissivity (low-E) coating on one major side thereof, and a dielectric coating for improving angular stability on the other major side thereof.

The invention relates to a frequency selection surface structure applied to a Ku waveband and a unit structure thereof. The unit structure comprises a first metal layer, a dielectric substrate and a second metal layer which are arranged in order from top to bottom, wherein the first metal layer is provided with a first star-shaped gap, and the first star-shaped gap comprises a first polygonal gappart positioned at the center and a plurality of first triangular gap parts surrounding the first polygonal gap part; and a second star-shaped gap comprises a second polygonal gap part positioned at the center and a plurality of second triangular gap parts surrounding the second polygonal gap part. The frequency selection surface structure comprises M*N periodically arranged unit structures. The frequency selection surface structure has very high filtering features in the 12GHz frequency band and can prevent the broadcast signals of a satellite from being interfered by other frequency signalsin a downlink.

The invention discloses a dual-polarization three-passband three-dimensional frequency selective surface. The frequency selective surface is formed by periodically arranging a plurality of same unit structures, and each unit structure is formed by combining a square metal cylinder and a square dielectric block. The upper end face and the lower end face of the square dielectric block have the samestructure and are engraved with two metal square rings, a metal square ring is engraved in the middle layer of the square dielectric block, and the metal square rings on the upper and lower end facesof the square dielectric block and the metal square ring on the middle layer are concentric rings. Due to the electromagnetic coupling effect in the unit structure, a plurality of transmission zero poles are generated, and three passbands are formed. Due to the introduction of a plurality of transmission zeros, the frequency selective filter has good frequency selective performance. And through the design of the metal square rings with very close sizes, the small passband ratio performance is realized. In addition, the frequency selective surface has a small electrical size, and has good anglestability in a dual polarization mode.

A cellulose ester film containing a polyester represented by Formula (1) or (2), wherein an in-plane retardation value (Ro) is 0 to 5 nm and a retardation value in a thickness direction (Rt) is −20 to 10 nm, Ro and Rt being measured at 23° C. and 55% RH:B1-(G-A-)mG-B1  Formula (1)wherein B1: monocarboxylic acid, G: dihydric alcohol, A: dibasic acid, B1, G and A contain no aromatic ring, m: repeat number, plural B1 may be the same or different, and plural G may be the same or different; andB2-(A-G-)nA-B2  Formula (2)wherein B2: monoalcohol, G: dihydric alcohol, A: dibasic acid, provided that none of B2, G and A contains an aromatic ring, n: repeat number, plural B2 may be the same or different, and plural G may be the same or different.

Deflectors configured to be attached to cables towed behind a vessel for performing a marine survey are provided. A deflector has a wing body including a first part joined to a second part to form a swept-back-wing shape, the first part and the second part being substantially coplanar. A first straight line stretching along at least a portion of a front edge of the first part makes a first angle with a second straight line stretching along at least a portion of a front edge of the second part. A third straight line stretching along at least a portion of a trailing edge of the first part makes a second angle with a fourth straight line stretching along at least a portion of a trailing edge of the second part, the first angle and the second angle being non-zero angles.

The invention discloses a dual-polarization three-order band-pass three-dimensional frequency selective surface that is formed by periodically arranging a plurality of same unit structures. Each unitstructure includes a metal square cylinder and a dielectric square block. A metal square ring is etched at the central position of each of the upper surface, the middle layer and the lower surface ofthe dielectric square block. The metal square rings on the upper surface and the lower surface of the dielectric square block are the same in size and the perimeters of the two metal square rings arelarger than that of the metal square ring of the middle layer. Because of electromagnetic coupling between the resonance units on the upper surfaces and the lower surfaces of the unit structures, twotransmission poles are generated; the metal square rings of the middle layers, the metal square cylinders and the dielectric square blocks jointly act to form a third transmission pole, so that a flatthree-order passband is formed. Due to reverse offset of signal phases, three transmission zeros are introduced, so that the dual-polarization three-order band-pass three-dimensional frequency selective surface has high frequency selectivity wide out-of-band rejection and has high angle stability in a dual-polarization working mode.