134results about How to "Reduce symmetry" patented technology

The invention provides a nonaqueous electrolyte material, which consists of fluorosulfonylimide lithium and organic solvent with dielectric constant less than 30, and the organic solvent is selected from one or more of chain-like carbonate solvent, phosphate solvent, siloxane solvent, boroxane solvent, acetate solvent, propionate solvent, butyrate solvent, CF3OCH2CH2OCF3 solvent, C2H5OCH2CH2OCH3 solvent, C2F5OCH2CH2OCF3 solvent, 1,3-dioxolane solvent and aliphatic nitrile solvent with more than two carbon atoms. The ionic conductivity of the nonaqueous electrolyte material is 0.01mS/cm to 18mS/cm, the lithium ion transference number is tLi plus equal to 0.2 to 0.8, and the applicable temperature range is 80DEG C below zero to 60DEG C below zero. The invention also provides an application of the nonaqueous electrolyte material in the preparation of lithium batteries and super capacitors. Furthermore, the invention provides a lithium battery and a super capacitor which contain the nonaqueous electrolyte material of fluorosulfonylimide lithium.

A vertical cavity surface emitting laser (VCSEL) comprising a one dimensional grating structure configured to act as a waveguide, preferably located at an end surface of the VCSEL, for selectively reflecting more of a first polarisation of light back into the cavity of the VCSEL than a second orthogonal polarisation of light. Preferably the VCSEL comprises an upper Bragg mirror, a gain region, and a lower Bragg mirror, and the one dimensional grating structure is located on a top layer of the upper Bragg mirror and the top layer of the upper Bragg mirror has a thickness such that the reflected light of one polarisation constructively interferes with light of said one polarisation which is reflected by the upper Bragg mirror. The VCSEL will then lase at the polarisation which is more predominantly reflected by the grating structure.

The present invention provides metal-containing compounds that include at least one β-diketiminate ligand, and methods of making and using the same. In some embodiments, the metal-containing compounds are homoleptic complexes that include unsymmetrical β-diketiminate ligands. In other embodiments, the metal-containing compounds are heteroleptic complexes including at least one β-diketiminate ligand. The compounds can be used to deposit metal-containing layers using vapor deposition methods. Vapor deposition systems including the compounds are also provided. Sources for β-diketiminate ligands are also provided.

The present invention intends to provide a surface-emitting laser light source capable of generating a linearly polarized laser light having a single-lobed beam profile that takes the largest intensity value in its central area. A two-dimensional photonic crystal consisting of a plate member 31 with holes 311 or 312 arranged in a square lattice pattern is provided on one side of an active layer 23. The hole 311 or 312 is designed so that its plane shape on the emission side (plane “B”) is smaller than that on the active layer side (plane “C”). The center of gravity of the shape on plane “B” is displaced from that of the shape on plane “C” in the in-plane direction. This design lowers the degree of the in-plane symmetry of the two-dimensional photonic crystal, so that a linearly polarized laser light having a single lobe is obtained.

The present invention provides a network topology structure on a star-cluster double-loop (SCDL), and the structure consists of 4m*2k processing units and 4m switching nodes, wherein, each 2k processing units are connected to form a star network topology structure, therefore, 4m star structures are formed; switching nodes of the 4m star structures are connected to form DL (2m) interconnection network topology structures. The present invention has the characteristics of canonicity, symmetry, planarity, excellent extendibility, lower network cost, simple switching nodes and simple routing policy. According to the present invention, a switching node is connected with four processing units, therefore, communication distance between processing units is reduced, localization feature of the system is improved, delay of the system is reduced and throughput of the system is improved. A novel Johnson coding method can be adopted by the switching nodes and processing units of the present invention, and the method make the coding of the switching nodes and processing units imply information of adjacent nodes and links of the interconnection network; therefore, the route algorithm design is simple.

The invention relates to a boron-containing organic compound and application of the boron-containing organic compound to an OLED device. The structure of the compound is shown as a general formula (1), the whole molecule of the compound is a large rigid structure, and the introduction of substituent groups reduces the planarity of a material, so the steric hindrance of the material is increased, the material is not easy to rotate, and a three-dimensional space structure is more stable; and therefore, the compound has higher glass transition temperature and molecular thermal stability. In addition, the HOMO and LUMO distribution positions of the compound are separated from each other, so the compound has appropriate HOMO and LUMO energy levels; and therefore, after the compound is applied to the OLED device, the luminous efficiency of the device can be effectively improved, and the service life of the device can be effectively prolonged.

The invention belongs to the material technical field, in particular to the selection of the matrix-materials doped with erbium and the control of rare earth lightening and a compound method thereof. The invention adopts a hot treatment technology of chemical coprecipitation. The '12:7'calcium aluminate powder which has highly efficient green, red, and infrared luminescence is gained by adjusting the mole ration of erbium and calcium ion less than 1100 DEG C, which is the temperature of hot treatment. Band-gap oxide '12:7' calcium aluminate is used as a matrix-material of doped erbium, in order to reduce the temperature quenching effect emitted in order to reduce the rare earth Er. The interior of the special cavity structure of '12:7' calcium aluminate restraints oxygen ion group. The characteristic that Cationic site symmetry is comparatively low is conducive to strengthening the emission of Er. And the disadvantages of uneven doped erbium resulted from the solid-state sintering method and the high temperature of sintering are overcome. The invention can reduce the temperature by 250 DEG C. The invention has low cost, controllable condition, and simple technique, and can be applied to the fields such as color display and optical communication, etc.

The invention discloses a preparation method of biodegradable regenerated polyester staple fibers, which is characterized by comprising the steps of drying spinning materials by a vacuum drum, mixing with biodegradable master batch dried by a master batch drying system at the feed inlet of a screw extruder; preparing primary fibers after mixing and fusing by the screw extruder and extruding by a spinneret plate; cooling primary fibers by an annular blowing device; successively carrying out winding, falling, bundling and time balancing on the primary fibers in a constant temperature and constant-humidity room; stretching the primary fibers in oil bath and stream respectively; performing curling, relaxation heat setting, cutting and packaging to obtain biodegradable regenerated polyester staple fibers, wherein physical properties and mechanical properties of the biodegradable regenerated polyester staple fibers produced by the method do not change, and therefore, the subsequent processing and usage are not influenced; after being used, the fibers can be decomposed into inert humus, carbon dioxide and water in a microorganism-enriching environments such as refuse landfill or composting site, thereby returning to nature and achieving real biodegradation.

A magnetic sensing element which allows a high reproduction output and reduction in asymmetry of reproduction waveform to become mutually compatible, as well as a method for manufacturing the same, is provided. In the inside of a second pinned magnetic layer and a free magnetic layer, the atomic percentage of an element Z is decreased in a region close to a non-magnetic material layer. Consequently, the ferromagnetic coupling magnetic field due to magnetostatic coupling (topological coupling) between the pinned magnetic layer and the free magnetic layer can be reduced. At the same time, in a region at a distance from the non-magnetic material layer, the atomic percentage of an element Z is increased, a spin-dependent bulk scattering coefficient is increased, and a product of the amount of change in magnetic resistance and the element area of the magnetic sensing element can be maintained at a high level.

The invention relates to a fast thickening vinyl ester resin as well as a preparation method and application thereof. The fast thickening vinyl ester resin comprises the following ingredients according to the parts by weight: 1000 parts of bisphenol A epoxy resin, 100-180 parts of unsaturation monocarboxylicacid, 20-35 parts of maleic anhydride, 1-3 parts of catalyst, 0.05-0.2 part of polymerization inhibitor and 800-2500 parts of crosslinking monomer; a thickening accelerator is generated by the reaction of the high-molecular-weight mixture of polyethylene glycol and/or polypropylene glycol and trimellitic anhydride, wherein the molar ratio of the polyethylene glycol/polypropylene glycol and the trimellitic anhydride is 1:1.3-1.5; and the weight ratio of the thickening accelerator and an epoxy vinyl ester resin matrix is 0.03-0.2:1. The preparation method comprises synthesizing the resin matrix and the thickening accelerator and mixing the resin matrix and the thickening accelerator. The invention has the advantages that a plurality of free carboxyls and the thickening accelerator with a plurality of long-chain branches are added, so that the thickening reaction can be more effectively carried out on the free carboxyls and MgO in the raw material of sheet molding compound, therefore, the thickening speed of resin system can be increased.

The invention discloses an N, N'-diphenyl-N-(9, 9-dimethyl-2-fluorenyl)-N'-(9, 9-dimethyl-7'-(2''-naphthyl)-2'-fluorenyl)-benzidine and a synthesis method thereof. The method uses 9, 9-dimethyl-2-acetyl aminofluorene, 9, 9-dimethyl-2-bromine fluorine and 2-bromonaphthalene as starting materials for respectively preparing three segments. Finally, the three segments are respectively processed with a Ullmann condensation reaction and a Suzuki coupling reaction, and then, a final product is obtained through purification. The product prepared by a mode provided by the invention has higher heat stability and lower crystallinity, so that, when the product is used as a hole transmission material, too much holes in a luminescent layer are reduced, and service life of an OLED material can be prolonged. Additionally, a test result shows that purity of the product can be more than 99%, yield is high, and cost is low, so that the product is suitable for industrial production.

The invention discloses a micro-hemispherical resonator gyroscope based on borosilicate glass annealing forming and a preparing method of the micro-hemispherical resonator gyroscope. A silicon wafer is used as a substrate to form a silicon substrate, a cylindrical cavity and a center supporting pillar in the circle center of the cavity are etched on the upper surface of the silicon wafer, and the center supporting pillar is connected with the center of a hemispherical resonator to form a suspension structure. Meanwhile, eight flat plate type electrodes are evenly distributed on the periphery of the cylindrical cavity in the upper surface of the silicon wafer and around the hemispherical resonator, and the eight flat plate type electrodes are composed of the four driving electrodes and the four detection electrodes. All the driving electrodes and all the detection electrodes are not in contact with the hemispherical resonator, identical gaps exist, and the driving electrodes and the detection electrodes are arranged in sequence alternately. The prepared glass metal blowing type micro-hemispherical resonator gyroscope has the advantages of being simple in structure, low in surface stress, high in symmetry and the like, and therefore the micro-hemispherical resonator gyroscope can have stable performance and a wider application range.

The invention, which relates to the technical field of biomedicine, provides a piezoelectric stent composition capable of realizing self-generating electricity stimulation as well as a preparation method and application thereof. The composition is composed of a biodegradable metabolic material and a piezoelectric material. With a 3D printing, jetting, pouring, extruding, die forming or electrostatic spinning method, the co-melt of the biodegradable material and the piezoelectric material or an organic solvent is formed into various biomedical application stents, especially nerve conduit stents. According to the invention, the mechanical energy in an in-vivo environment can be into electrical stimulation to promote regeneration, proliferation and differentiation of nerves, muscles, bones, blood vessels and the like without implantation of an external power supply or an electrode. The piezoelectric stent composition has advantages of being simple to prepare, low in cost, easy to controlin quality, wide in application range and the like. Rat in-vivo experiments show that the piezoelectric catheter stent has functions of promoting nerve regeneration and angiogenesis, relieving muscleatrophy and the like and has the broad clinical application prospects.

The invention discloses an erbium-doped yttrrium lanthanum oxide luminescent material and a preparation method thereof. The molecular formula of the luminescent material is (ErxY1-x-yLay)2O3, wherein 0<x<=0.05, 0.08<=y<=0.1. A low temperature gel-combustion method is used for preparing the erbium-doped yttrrium lanthanum oxide luminescent material, and the method comprises: a polymerization gelation of a nitrate solution and an incendiary agent, a low temperature spontaneous combustion of a gel and a high temperature calcination of a precursor. The erbium-doped yttrrium lanthanum oxide luminescent material has a good optical performance; because La<3+> is introduced, green upconversion fluorescence and 1.5-1.6 [mu]m near infrared emission intensity are simultaneously and substantially improved; the material is an ideal luminescent material and has the advantages of good chemical stability and heat stability, non-toxicity and non-radiation; the material can be applied in the fields of display, temperature sensor, biomarker, medical monitoring, high-precision measurement, etc.

A brake comprising a brake disk stack including stators alternating with rotors that are rotatable relative to the stators about an axis of the disk stack, an annular torque plate at one axial end of the brake disk stack, and a circumferential arrangement of actuators at the other axial end of the brake disk stack for urging the brake disk stack against the torque plate thereby to effect a braking force on the rotors. A back leg (33) of the annular torque plate includes a plurality of apertures (110a-110f) arranged asymmetrically around the axis of the brake disk stack.

The invention discloses a light-emitting auxiliary material. The structural general formula of the light-emitting auxiliary material is shown as a chemical formula I. The invention also discloses a preparation method of the light-emitting auxiliary material and an application of the light-emitting auxiliary material in an organic light-emitting device. The organic light-emitting device prepared from the light-emitting auxiliary material provided by the invention has the characteristics of low driving voltage, high light-emitting efficiency and long service life.

The invention discloses vanadium-doped strontium titanate nanofiber. A preparation method of the vanadium-doped strontium titanate nanofiber includes the following steps that electrostatic spinning isconducted on a vanadium-doped strontium titanate electrostatic spinning precursor solution to obtain a fiber film; and the fiber film is calcined, and the vanadium-doped strontium titanate nanofiberis obtained, wherein the vanadium-doped strontium titanate electrostatic spinning precursor solution includes vanadium salt, strontium salt, titanium salt, high polymers and solvent. In construction of piezoelectric catalysis nanometer materials, the vanadium-doped strontium titanate nanofiber piezoelectric material has a non-centrosymmetry structure, is an excellent ferroelectric material, has aninternal space charge layer, can effectively generate piezoelectric inductive charges and has good piezoelectric performance, and under external ultrasonic vibration, the material can effectively degrade and remove organic pollutant in a water body.

The invention relates to an insulating material for bus, which comprises the following components by weight: 65-85 parts of bisphenol A-type epoxy resin, 0.06-0.11 part of nanometer organic montmorillonite, 15-35 parts of a curing agent, 280-380 parts of SiO2 micro powder, 0.01-0.05 part of ZnO micro powder, and 0.05-0.15 part of BaTiO3 micro powder. The insulating material of the invention can operate under awful weather conditions, is widely applicable to power plants, power stations, transformer substations, photovoltaic power stations, wind power generation transformer substations, is an important accessory for power transmission equipment, is an important material for processing high voltage electric power matching insulating parts, and has good insulating properties and water resistance. The invention also provides a preparation method of the insulating material.

The invention belongs to the technical field of microwave vacuum electronic devices, and relates to a high wave-band space travelling wave tube PPM structure optimization designing method. According to the invention, by presetting the offset quantity of a magnet ring to be within 0.2mm, and using magnetic field simulation software to simulate a PPM pole shoe structure of offset of the magnet ring,the inner diameter of the pole shoe is reduced, so the symmetry of the magnetic field during asymmetry of the magnet ring can be reduced, the asymmetry of the magnet ring caused by asymmetry of assembly of the magnet ring is improved, the electronic beam flow rate is greatly improved, the asymmetry of the optimized magnetic field is obviously reduced and the fluctuation of the electronic beams isreduced. Compared with the prior art, a preprocessing idea is provided; during design, the PPM structure is optimized, so the asymmetry of the magnetic field caused by asymmetry of the magnet ring caused by assembly is reduced, the electronic beam flow rate is improved, the design cost of the travelling wave tube is reduced and it is facilitated that the travelling wave tube is developed towardshigh wave bands.