36results about How to "Improved impact characteristics" patented technology

[Problems] To provide a tunable laser with high reliability and high performance, and of low cost.[Means for Solving Problems] A tunable laser (10) comprises a double ring resonator (11) where ring resonators (111, 112) of different sizes are coupled through a directional coupler (122), an LD side waveguide (13) connected at one end (131) to the ring resonator (111) through a directional coupler (123), a reflection side waveguide (14) connected at one end (141) to the ring resonator (112) through a directional coupler (123), a PLC board (15) on which the ring resonator (111) and the like are formed, a high reflection film (16) provided at the other end (142) of the reflection side waveguide (14), an LD chip (17) having a low reflection film (18) formed on either of two opposing emission end faces (171, 172) and coupled optically with the other end (132) of the LD side waveguide (13), and film-like heaters (191-194) for varying the resonance wavelength of the double ring resonator (11).

To provide a tunable laser with high reliability and high performance, and of low cost.A tunable laser (10) comprises a double ring resonator (11) where ring resonators (111, 112) of different sizes are coupled through a directional coupler (122), an LD side waveguide (13) connected at one end (131) to the ring resonator (111) through a directional coupler (123), a reflection side waveguide (14) connected at one end (141) to the ring resonator (112) through a directional coupler (123), a PLC board (15) on which the ring resonator (111) and the like are formed, a high reflection film (16) provided at the other end (142) of the reflection side waveguide (14), an LD chip (17) having a low reflection film (18) formed on either of two opposing emission end faces (171, 172) and coupled optically with the other end (132) of the LD side waveguide (13), and film-like heaters (191-194) for varying the resonance wavelength of the double ring resonator (11).

This case hardened steel, which has favorable cold forgeability and superior impact properties after case hardening processing, contains C, Si, Mn, S, Cr, Al, Ti, Nb, B, and N, the remainder being iron and unavoidable impurities, precipitates that are at least 20 [mu]m2 among precipitates containing Ti and / or Nb have a number density of no greater than 1.0 precipitates / mm2, precipitates containing Mn and S that are over 5 [mu]m2 and less than 20 [mu]m2 among precipitates containing Ti and / or Nb have a number density of over 0.7 and no greater than 3.0 precipitates / mm2, and the fraction of ferrite is over 77 area%.

An airfoil assembly (30) comprises a composite airfoil (40) having a leading edge (32) and a trailing edge (34), a pressure side (36) extending between the leading edge and the trailing edge, a suction side (38) extending between the leading edge and the trailing edge, opposite the leading edge, a metallic leading edge assembly (130) disposed over the composite air-foil, the metallic leading edge assembly including a high density base (50), the metallic leading edge assembly also including a nose (60) disposed over the base, an adhesive bond layer disposed between the composite airfoil and the metallic leading edge assembly.

The invention discloses a bearing early fault diagnosis method for multiple noise reduction processing. The method comprises the following steps: collecting a vibration signal of a bearing; carrying out short-time Fourier transform on the bearing vibration signal, and preliminarily judging whether the bearing has a fault or not; adopting wavelet packet transformation to decompose and reconstruct the bearing vibration signal, and carrying out preliminary denoising; decomposing, screening and reconstructing the wavelet packet reconstruction signal by using an ensemble empirical mode decomposition method; eliminating aliasing interference signals contained in the reconstructed signals, and performing multi-layer noise reduction on the bearing vibration signal; carrying out demodulation processing on the reconstructed signal after noise reduction, and extracting a bearing fault frequency; and comparing with a theoretically calculated fault frequency, and diagnosing to obtain a fault conclusion of the bearing. According to the method, a fault analysis mode combining wavelet packet transformation, an ensemble empirical mode decomposition method and autocorrelation calculation denoising is adopted, weak fault features are highlighted, bearing abnormity can be diagnosed and recognized as early as possible in the early fault stage of the bearing, and losses caused by equipment faults are avoided or reduced.

A bumper system includes a rollformed tubular beam with bracket mounts welded to a rear surface for mounting to vehicle frame rails. The illustrated beam has a continuous tubular cross section for its entire length, and includes a center section, corner-forming end sections, and mounting sections connecting ends of the center section to the end sections. The center, end and mounting sections can be linear or similarly curved or differently curved. The center, end and mounting sections can be similarly or differently locally annealed as part of being tuned to specific impact loading criteria, including annealing all or part of cross-sectional areas. The annealing can be done in-line with a rollforming process, such as to assist with forming tight radii in the beam for meeting packaging / space-related requirements, or can be part of a secondary process for advantageously affecting impact strengths in selected localized areas.

The invention is a temperature and blight insulated aeroponics root chamber built with opaque High-Density EPP (Expanded Polypropylene). The chamber is a fully or partially enclosed container to host plant roots, to provide thermal insulation and light blockage functions, and to control humidity, temperature, and liquid leakage inside of the growth environment. The chamber may be produced with molding process to create seamless body construction, or may consist of multiple components. There are outlets and inlets through the chamber enclosure for the flows of nutrients and wastes. The chamber may contain one or more optional nutrient reservoirs. The chamber may be in different shapes and colors. The chamber may work with one or more temperature control devices.

A dome-shaped shelter, which is readily manually assembled and disassembled, as needed, the shelter comprising a plurality of side-by-side generally triangular shaped arched segments enclosing a generally circular area, a support base with each of the segments comprising a lower end resting on the support base and a pair of spaced apart rigid upwardly arched side members converging upwardly from the lower end and a weather and UV resistant covering skin, a latch assembly securing each arched side member of a segment to the adjacent arched side member of an adjacent segment, a rigid vertical support mast releasably secured at the center of the encircled area, and manually releasable locking means securing the segments to the mast.

A dome-shaped shelter, which is readily manually assembled and disassembled, as needed, the shelter comprising a plurality of side-by-side generally triangular shaped arched segments enclosing a generally circular area, a support base with each of the segments comprising a lower end resting on the support base and a pair of spaced apart rigid upwardly arched truss members converging upwardly from the lower end and a weather and UV resistant covering skin, a latch assembly securing each arched side member of a segment to the adjacent arched side member of an adjacent segment, a rigid vertical support mast releasably secured at the center of the encircled area, and manually releasable locking means securing the segments to the mast.

The invention discloses a device and a method for dry-wet combined anaerobic fermentation for producing a biogas. The device for dry-wet combined anaerobic fermentation for producing the biogas comprises first pretreatment equipment, a dry-type anaerobic fermentation tank, biogas collection equipment, material conveying equipment, solid-liquid separation equipment, second pretreatment equipment, awet-type anaerobic fermentation tank, flocculation dehydration equipment and a sludge pump, wherein biogas dregs generated from the dry-type anaerobic fermentation tank are subjected to solid-liquidseparation and are fed into the wet-type anaerobic fermentation tank; and biogas slurry generated from the wet-type anaerobic fermentation tank is subjected to flocculation dehydration and is flown back to the dry-type anaerobic fermentation tank. The device for dry-wet combined anaerobic fermentation for producing the biogas, which is disclosed by the invention, is reasonable in design, simple instructure, relatively high in organic matter conversion rate, relatively high in volume gas generation rate, relatively good in material impact resistance and wide in application range.

A steel tie rod end includes a shaft portion and first and second fitting portions. A minimum area portion having a small radially cross-sectional area is provided for the shaft portion, and 90% or above of a steel structure of the minimum area portion is formed of martensite or tempered martensite. The surface hardness of the minimum area portion and the average hardness of the radial cross section of the minimum area portion are 600 Hv or below, and the average hardness of the radial cross section of the first fitting portion and the average hardness of the radial cross section of the second fitting portion are 300 Hv or below. A method of manufacturing a steel tie rod end includes a quenching process of heating only a prospective shaft portion by high frequency to an austenitizing temperature and then rapidly cooling the prospective shaft portion by water or cooling medium.

The invention belongs to the field of electric system grounding for lightening protection, and relates to a multi-current scattering arm star-shaped grounding electrode topological structure. The multi-current scattering arm star-shaped grounding electrode topological structure is specifically suitable for a grounding electrode in a pole tower earth screen. A novel grounding electrode arrangement form is designed so that an impact grounding resistance value under a high earth resistivity can be reduced. According to the arrangement form, current scattering channels, in the grounding electrode, of a lightning current are increased, namely, each radiation branch of the star-shaped grounding electrode is additionally provided with at least one bifurcate current scattering arm, one end of each bifurcate current scattering arm is connected with the tail end of the corresponding radiation branch, the other end of each bifurcate current scattering arm extends in the radial direction, therefore, the better current scattering effect can be achieved, the impact performance of a grounding body is effectively improved, and the impact grounding resistance value of the grounding electrode is reduced. The structure is easy to manufacture and install, construction difficulty caused by the fact that the grounding electrode is lengthened blindly is avoided, a very good resistance reducing effect can be achieved, the performance is superior, and the structure is economical and reasonable.

The purpose of the present invention is to provide a heat-resisting steel for exhaust valves, which contains a relatively small amount of Ni and has excellent mechanical characteristics (such as tensile strength, fatigue strength, wear resistance and hardness) at high temperatures and excellent corrosion resistance. The present invention provides a heat-resisting steel for exhaust valves, which contains 0.45 mass% or more but less than 0.60 mass% of C, 0.30-0.50 mass% (exclusive) of N, 19.0 mass% or more but less than 23.0 mass% of Cr, 5.0 mass% or more but less than 9.0 mass% of Ni, 8.5 mass% or more but less than 10.0 mass% of Mn, 2.5 mass% or more but less than 4.0 mass% of Mo, 0.01 mass% or more but less than 0.50 mass% of Si and 0.01 mass% or more but less than 0.30 mass% of Nb, with the balance made up of Fe and unavoidable impurities. This heat-resisting steel for exhaust valves satisfies 0.02 <= Nb / C < 0.70 and 4.5 <= Mo / C < 8.9.

The invention provides a high-strength steel sheet excellent in stretch-flange characteristics after working and in corrosion resistance after coating. A steel sheet which has a composition containing by mass C: 0.02 to 0.20%, Si: 0.3% or below, Mn: 0.5 to 2.5%, P: 0.06% or below, S: 0.01% or below, Al: 0.1% or below, Ti: 0.05 to 0.25%, and V: 0.05 to 0.25% with the balance consisting of Fe and unavoidable impurities and a substantially ferrite single-phase structure wherein the contents of Ti, V, and solid-soluted V in precipitates of less than 20nm in size are 200 to 1750 mass ppm, 150 to 1750 mass ppm, and 200 to less than 1750 mass ppm respectively.

The invention relates to a multilayer co-extrusion transparent high-impact antistatic polycarbonate composite material and a preparation method thereof. The composite material comprises two surface layers on the outermost layer and a core layer between the two surface layers, the two surface layers are static dissipation layers, and the core layer is a polycarbonate layer; the static dissipation layer comprises the following components in parts by weight: 50-95 parts of copolymerized PC resin; 5-40 parts of an antistatic auxiliary agent; and the polycarbonate layer is made of pure polycarbonate or functional polycarbonate. The composite material has the characteristics of good antistatic property, high transparency, high strength and high impact.

The invention discloses a data noise reduction method based on improved empirical mode decomposition (EMD) and minimum entropy deconvolution (MED). The invention belongs to the technical field of communication, and comprises the following specific steps: 1, denoising an original signal by using MED to enhance the impact characteristic of the signal; 2, inputting the denoised signal into an improved EMD for decomposition, and drawing an envelope line on the denoised signal by using an envope function to enhance the continuity of the signal; 3, extracting characteristic variables, namely IMF components, of the signal with the drawn envelope line by using improved EMD, so that the signal processing workload is reduced; and 4, finally, inputting the extracted IMF components into other subsequent data processing models, so that the workload of subsequent model processing is reduced, and the precision of subsequent data analysis processing is improved. According to the method provided by theinvention, the limitation of MED feature extraction under strong background noise is made up, and the defect that empirical mode decomposition is insensitive to weak fault features is overcome.

A hot-formed member that has both a prescribed chemical composition and a metal structure which contains 10 to 40% by area of austenite and in which the total number density of grains of the austenite and martensite is 1.0 grain / Mum2 or more and that exhibits a tensile strength of 900 to 1300MPa.

Provided are a polycarbonate resin composition, a molded article, and a structure member for solar photovoltaic power generation, the polycarbonate resin composition including: (A) 100 parts by mass of a resin mixture formed of 30 mass % to 100 mass % of a polycarbonate-polyorganosiloxane copolymer (A-1) having a repeating unit represented by the general formula (I) and a repeating unit represented by the general formula (II), and having an average chain length n of a polyorganosiloxane moiety of from 70 to 500, and 70 mass % to 0 mass % of an aromatic polycarbonate resin (A-2) except the polycarbonate-polyorganosiloxane copolymer (A-1); (B) 0.08 part by mass to 0.3 part by mass of a silsesquioxane; (C) 0.05 part by mass to 0.2 part by mass of an alkaline metal salt and / or an alkaline earth metal salt of an organic sulfonic acid; (D) 0 parts by mass to 0.3 part by mass of a polytetrafluoroethylene having a fibril-forming ability; (E) 1 part by mass to 10 parts by mass of titanium dioxide; and (F) 0.1 part by mass to 3 parts by mass of carbon black.

This door inner panel is a door inner panel formed of a metal sheet and includes a first panel portion having a first top sheet portion and a first standing wall portion connected to the first top sheet portion, a second panel portion having a second top sheet portion disposed with a gap with the first top sheet portion of the first panel portion and a second standing wall portion connected to the second top sheet portion, a flange portion connected to the first standing wall portion and the second standing wall portion, and a flat sheet portion disposed between the first panel portion and the second panel portion, the first standing wall portion and the second standing wall portion respectively have a level difference portion, and both ends of the flat sheet portion are integrated with the flange portion or the level difference portions.

The invention provides a high-glossiness flame-retardant PC / PET / nano-kaolin composite material and a preparation method thereof. The composite material is prepared from the ingredients: 33-55 parts of PC, 20-30 parts of PET, 5-10 parts of nano kaolin, 3-5 parts of barium sulfate, 10-15 parts of halogen-free flame retardant, 5-8 parts of toughening agent, 2-4 parts of compatibilizer, 0.3-0.5 part of antioxidant, 0.3-0.5 part of ester exchange inhibitor, 0.5-1.5 parts of nucleating agent, 0.3-0.5 part of lubricant and 0.4-0.8 part of high-glossiness auxiliaries. The high-glossiness and high-impact 5VA flame-retardant PC / PET / nano-kaolin composite material prepared by the method provided by the invention has very high weather resistance, flame retardance and high-impact property and has a very good resisting effect on solvents, oil stains and other chemicals. The problems that ordinary PC materials are poor in oil resistance and suffer from stress cracking, ordinary PC / ABS hardly reaches a 5VA flame-retardant level, PC / PET / inorganic filler is low in impact, and ordinary PC / PET has the characteristics of high shrinking percentage, low strength, easiness in ester exchange, and the like are successfully solved. The PET endows alloy with better oil resistance and heat resistance, and the nano kaolin endows the alloy with excellent dimensional stability, flame retardance and rigidity.

A steel tie rod end includes a shaft portion and first and second fitting portions. A minimum area portion having a small radially cross-sectional area is provided for the shaft portion, and 90% or above of a steel structure of the minimum area portion is formed of martensite or tempered martensite. The surface hardness of the minimum area portion and the average hardness of the radial cross section of the minimum area portion are 600 Hv or below, and the average hardness of the radial cross section of the first fitting portion and the average hardness of the radial cross section of the second fitting portion are 300 Hv or below. A method of manufacturing a steel tie rod end includes a quenching process of heating only a prospective shaft portion by high frequency to an austenitizing temperature and then rapidly cooling the prospective shaft portion by water or cooling medium.

The invention discloses a pendulum bob shock test apparatus table board with a locking guide rail device. The pendulum bob shock test apparatus table board comprises an impact table board, a table board guide rail and a table body guide rail, wherein the impact table board is fixed on the table board guide rail; the table body guide rail is fixed on an impact table base; the impact table board and the table board guide rail are arranged on the table body guide rail in a sliding manner as a whole; an adjusting bolt is arranged at the bottom of the table body guide rail and used for adjusting the depth of parallelism of the table body guide rail and a to-be-tested pendulum bob; and the table board guide rail is of a square frame structure. The pendulum bob shock test apparatus table board and the guide rail device disclosed by the invention have better table board uniformity, repeatability and stability, and simultaneously have locking functions, loosening of the table body caused by repeated impact of the table board at present is avoided, and the impact test efficiency is greatly improved.

The invention relates to an adjustable-inductance solenoid type superconducting current limiter, which comprises a plurality of solenoids connected in series. Superconducting coils are fixed to a solenoid type current limiter framework through current leads, and different solenoids are connected through the current leads on the solenoid type superconducting current limiter framework, wherein the connection modes of every two adjacent solenoids in the solenoids connected in series comprise a reverse series connection mode and a forward series connection mode. On one hand, the solenoid connection mode can be selected to make the influence on a power grid under a normal operation condition small; and on the other hand, the solenoid connection mode can select a connection mode with good impactcharacteristics and high fault current suppression rate. Solenoid connection modes under the two conditions are analyzed, and a connection mode with good characteristics under the two conditions is selected.

Provided is a method of preparing a continuous fiber reinforced composite, and the method includes impregnating fibers provided from at least one fiber creel or metal wires provided from at least one metal wire creel in a thermoplastic resin to form a melt; molding a shape of the melt by using a mold and curing the resultant by heating in a heating tube to form a primary cured product, as a primary molding process; re-molding the primary cured product by using the mold again and curing the resultant by heating in the heating tube to form a secondary cured product, as a secondary molding process; and cooling, pultruding, and cutting the secondary cured product to perform finishing of the product.

The invention belongs to the field of lightning protection and grounding of electric power systems, and relates to a star-shaped grounding pole topology structure with multiple scattered flow arms, which is particularly suitable for grounding poles in pole tower grounding grids. By designing a new grounding pole layout form, high soil resistance can be effectively reduced The impact grounding resistance value under the rate. This arrangement increases the distribution channel of the lightning current in the ground electrode, that is, at least one forked diffusion arm is added to each radiation branch of the star-shaped ground electrode, and one end of the bifurcated diffusion arm is connected to the end of the radiation branch. , the other end extends radially, which can achieve a better dispersion effect, effectively improve the impact characteristics of the grounding body, and reduce the impact grounding resistance of the grounding electrode. The method is simple to manufacture, easy to install, avoids construction difficulties caused by blindly increasing the length of the grounding electrode, and can achieve a good effect of reducing resistance, with excellent performance and reasonable economy.

The invention provides a high-strength steel sheet excellent in stretch-flange characteristics after working and in corrosion resistance after coating. A steel sheet which has a composition containing by mass C: 0.02 to 0.20%, Si: 0.3% or below, Mn: 0.5 to 2.5%, P: 0.06% or below, S: 0.01% or below, Al: 0.1% or below, Ti: 0.05 to 0.25%, and V: 0.05 to 0.25% with the balance consisting of Fe and unavoidable impurities and a substantially ferrite single-phase structure wherein the contents of Ti, V, and solid-soluted V in precipitates of less than 20nm in size are 200 to 1750 mass ppm, 150 to 1750 mass ppm, and 200 to less than 1750 mass ppm respectively.

The invention relates to a manufacturing method of a modified bamboo powder-based PC / ABS (Poly carbonate / Acrylonitrile Butadiene Styrene) alloy in the field of high polymer materials. The manufacturing method comprises the following steps: carrying out blending and internal mixing on bamboo powder, ABS-g-MAH (Maleic Anhydride), a fiber pre-dispersing agent and a coupling agent to obtain an ABS-g-MAH-g-bamboo powder composite; blending the ABS-g-MAH-g-bamboo powder composite, PC-g-EVA (Ethylene Vinyl Acetate) and PEW (polyethylene wax)-g-MAH at high speed and carrying out melt blending to obtain the modified bamboo powder-based PC / ABS alloy. The alloy material manufactured by the method disclosed by the invention not only has superhigh normal-temperature impact tenacity and low-temperature impact tenacity, but also has low viscosity property, is easy for molding processing of larger products, and has relatively high tensile strength, relatively low cost and an environment-friendly effect as well as a wide market value.