261results about How to "Loose requirements" patented technology

The invention discloses a method for preparing MOF-5 and belongs to the technical field of preparation of metal framework materials. Zinc sources and terephthalic acid are dissolved in solvents separately. One solution is heated, and the other solution is added into the heated solution dropwise to prepare MOF-5 by a solvothermal method. The method not only utilizes existing devices, but also controls the degree of supersaturation of reaction solutions at a low level without consuming more solvents to prepare MOF-5 with good granule consistency, high specific surface area and good thermostability. The method reduces consumption of solvents, and has loose facility requests and simple operations, and MOF-5 can be prepared economically and effectively.

The invention relates to an anti-interference attitude control method suitable for a miniaturized unmanned aircraft. The method comprises the following five major steps: decomposing an aircraft model into a determination part and a disturbance term; according to a decomposition model of an aircraft, designing a disturbance observer based on flight state estimation; according to the determination part of the aircraft model, designing an attitude controller, adding an anti-disturbance integrator, and forming an integration backstepping attitude controller; replacing a disturbance item in the integration backstepping attitude controller with the output of the disturbance observer to obtain an anti-interference attitude controller; and performing stability analysis on the anti-interference attitude controller to obtain a control parameter value criterion. Compared to the prior art, the anti-interference controller can rapidly reacts to external disturbance and has quite high robustness for continuous and time-varying disturbance; and the external disturbance can be inhibited, the control performance in a severe environment is improved, unfavorable influences brought by an inaccurate mathematics model are reduced, the modeling workload is decreased, and the parameter setting of the anti-interference attitude controller is convenient.

The CO2-CH4 reforming process of preparing synthetic gas includes adding preheated CH4, CO2, water vapor and O2 into high temperature carbon system inside the hot conversion reactor, raising the temperature to over 950 deg.c, and under the presence of H2O and O2, high temperature C, H2, CH4 and CO2 produce chemical reaction to produce synthetic gas, and outputting the synthetic gas after heat exchange to lower temperature. The present invention realizes the reformation and conversion of CO2 and CH4 high temperature carbon system, and has simple technological process, low cost, high heat efficiency and no catalyst deactivation caused by carbon deposit and sulfur. The present invention is suitable for coal gasification.

A method of optimizing the timing offsets with which data frames are transmitted over the Iur/Iub interfaces of a UMTS Terrestrial Radio Access Network, UTRAN. The method comprises, for a given Iur/Iub interface or set of Iur/Iub interfaces over which identical user plane data is to be sent, defining a duration of a data frame receiving window for use by the receiving node(s), transmitting data frames from a sending node with an initial timing offset sufficient to ensure a likelihood that the frames will be received at the or each receiving node within the defined receiving window, reducing the timing offset at the sending node in a stepwise manner, and adjusting the timing offset at the sending node in response to the receipt of late Time of Arrival error reports at the sending node. In a second embodiment, the frame synchronisation of frames corresponding to speech services and data services is carried out by delaying the frames corresponding to speech services a fixed delay and the frames corresponding to data services a variable delay based on a received time of arrival feedback.

The invention relates to a copper base alloy and a preparation method for the copper base alloy. Chemical compositions and weight percentage of the copper base alloy are that: nickel: 14.0 to 30.0 percent; manganese: 14.0 to 30.0 percent; ferrum: 1.0 to 8.0 percent; the residual is copper; moreover, aluminum: less than 0.002 percent; plumbum: less than 0.002 percent; antimony: less than 0.002 percent; bismuth: less than 0.002 percent; phosphorus: less than 0.01 percent; the residual composition is copper. The copper base alloy with high performance is prepared after smelting and thermo-mechanical treatment, microstructure of the alloy can be controlled to be nearly equiaxial crystal particles with the diameter of 50 micrometers. The alloy has ageing strengthening effect. When the alloy is stretched under room temperature by ageing after cold deformation, the breaking strength sigma b reaches 1480 MPa at maximum; the extensibility delta 5 reaches 6 percent at maximum; the Vickers hardness Hv reaches 470 at maximum. When the alloy is stretched under high temperature of 400 DEG C, the breaking strength sigma b reaches 1100MPa at maximum, and the extensibility delta 5 reaches 6 percent at maximum.

The invention discloses a magnetic suspension-based detection apparatus and detection method for defects of parts. The detection apparatus comprises two magnets coaxially arranged along a vertical direction and a detection container arranged between the two magnets and provided with a sample feeding inlet, wherein the same poles of the two magnets are arranged face to face, magnetic induction intensities on the surfaces of the magnetic poles are same, and the detection container is filled with a paramagnetic medium solution. The detection apparatus is applicable to a sample with a cross section of a centrosymmetric structure, wherein the height of the sample is no more than 3/4 of the greatest diameter of the cross section and the magnetic susceptibility of the sample is less than 1 * 10<-5>. Compared with the prior art, the invention has the following beneficial effects: the detection method is simple to operate and has no harsh requirements on an operator; the detection apparatus has a simple integral structure and low cost; detection results are easy to observe; detection sensitivity is high; and automation can be easily realized.

The invention provides a laser far field focal spot measurement method based on orthogonal light wedge dichroism and a focal spot reconstruction algorithm. A measurement apparatus used in the method comprises a pair of orthogonal light wedges, a focusing lens, a CCD imaging device and a computer system. Beam splitting is performed to an incident laser beam through two light wedge device whose wedge angle directs to a mutually orthogonal direction and the incident laser beam is converged through the focusing lens. After that, the incident laser beam forms sub-spot array with successively damped peak strength on a CCD photosensitive surface in a lens plane. An effective method is used to carry out splicing fusion on each of the measured sub-spot. And finally, complete laser far field focal spot intensity distribution can be obtained through reconstruction. According to the invention, CCD dynamic measurement range can be greatly developed; a lot of high-frequency side-lobe information of the actual focal spot can be extracted from CCD background noise so that accurate measurement and light beam quality evaluation can be possibly achieved.

The invention provides a horizontal fillet welding seam angle-wrapping process suitable for automatic welding, and the horizontal fillet welding seam angle-wrapping process is suitable for unit vertical welding in a ship building process, adopts gas-shielded welding to carry out automatic welding to complete horizontal fillet welding seam angle-wrapping welding for a bottom plate and reinforcing ribs, and belongs to the technical field of gas-shielded welding automatic welding. According to the technical scheme adopted by the invention, two robots drive two welding guns; arcs are initiated from the two sides to drive the welding guns to move to the middle of the reinforcing ribs, so that angle-wrapped welding is completed, welding seams are full, and dimensions of the welding seams meet requirements. The horizontal fillet welding seam angle-wrapping process provided by the invention has the positive effects of reducing times of overlap welding, arc initiating and arc extinguishing, avoiding defects, reducing interferences of the welding guns and workpieces, especially reinforcing ribs with circular-arc holes in end parts, expanding automatic welding cover range and greatly simplifying trial teaching workload. The horizontal fillet welding seam angle-wrapping process is wide in scope of application, easily realizes automatic welding, has relatively low requirements on workpiece pairing, and improves welding quality and working efficiency.

A satellite laser distance measurement system based on tilt calibration is featured as setting high speed tilt reflector in telescoping unit, using tilt tracking transducer to carry out wave front detection on light wave received by receiving telescope, outputting calibration control signal to high speed tilt mirror in telescope by high speed processor after error signal is restored, starting up satellite laser distance measurement system in telescoping unit to send out laser with specific wavelength for carrying out satellite laser distance measurement after tilt closed loop real time calibration is finished.

The invention relates to nonlinear optical frequency conversion, and belongs to the interdisciplinary field of the terahertz radiation source technology and the optical frequency comb technology. For providing a terahertz frequency comb device based on optical rectification in a periodically poled crystal and a modulation method, and achieving an effect that the wide spectrum output is implemented in a range of 0.2-3.5 THz, a free spectrum range can reach 0.5 THz, and the device can run stably at room temperature, the invention adopts a technical scheme as follows: the terahertz frequency comb device based on the optical rectification in a periodically poled crystal is composed of a laser device, a periodically poled crystal and a receiving/detecting system, and a beam splitter and a glass convex lens are configured between the laser device and the periodically poled crystal; a polyethylene lens is arranged between the periodically poled crystal and a detector; generated THz waves areoutputted perpendicular to the side face of the crystal, and collected by the polyethylene lens; and the receiving/detecting system comprises a photoconductive antenna detector, a computer controllerand a delay line. The device and method provided by invention are mainly applied to nonlinear optical frequency conversion.

The invention discloses a bio-diesel oil preparation method made by solid acid and base bifunctional catalyst. The molar ratio of low carbon alcohol and raw material oil is 3:1-40:1; then the raw reaction material is prepared according to that the solid and base bifunctional catalyst is of 0.1-20 percent of raw material oil, and the reaction material is then sent into a reaction device with 25 MPa of pressure and 300 DEG C to be stirred and fully reacted; thereafter, the low carbon alcohol is distilled and the solid acid and base bifunctional catalyst is separated out. Finally, the bio-diesel oil and glycerin are made. The solid acid and base bifunctional catalyst has high activity, is easy to be separated and recycled, can be reused, has convenient operation, easy control, low cost, simple sequential treatment to obtained production, high transformation rate, good industrialization application prospect and is environment-friendly.

The invention discloses a strain QM5236 special for fermenting green plum fruit wine. The strain is collected in the China General Microbiological Culture Collection Center with the collection number CGMCC No.8485 on November 19, 2013. The green plum fruit wine and a preparation method thereof are further disclosed. The green plum fruit wine is obtained through preparing and treating green plum fruit pulp serving as a raw material by taking the saccharomyces cerevisiae strain QM5236 as a production strain, and performing the processes of primary fermentation, secondary fermentation, aging, filtering, sealing and sterilizing. The saccharomyces cerevisiae strain QM5236 in the technical scheme is suitable for a green plum fruit pulp fermentation system, and the product fruit wine is outstanding in particular flavor and excellent in organoleptic quality.

The invention discloses an ageing resistant type solar photovoltaic component sealing material and a preparation method thereof. The ageing resistant type solar photovoltaic component sealing material comprises the following components in parts by weight: 100 parts of poly organic siloxane, 5-20 parts of a plasticizer, 50-150 parts of a filler, 0.2-5 parts of a water absorbent, 1-10 parts of paste containing an ultraviolet light absorber, 1-15 parts of a crosslinking agent, 0.1-5 parts of a viscosity thickening agent and 0.1-1 part of a catalyst. The ageing resistant type solar photovoltaic component sealing material has the advantages that the paste containing the ultraviolet light absorber is added in the components, so that the obtained product is reduced by less than 5% in mechanical property after an ultraviolet aging test is carried out, has good bonding force with an aluminium frame of a photovoltaic cell and is non-corrosive to an EVA (ethylene vinyl acetate copolymer) adhesive film and a battery circuit; and the provided preparation method is simple in technology, equipment requirement is not harsh, and the technical effects of good ultraviolet ageing resistance and high curing speed of a one-component solar cell module sealant are realized.

The invention provides a camera module assembling method, which comprises the following steps: preparing a first sub lens and a second sub assembly, wherein the second sub assembly comprises a secondsub lens and a photosensitive assembly which are fixed together; disposing the first sub lens on an optical axis of the second sub lens to form an imageable optical system; increasing an actually measured resolving power, acquired through the photosensitive element, of imaging of the optical system by adjusting a relative position of the first sub lens relative to the second sub lens, and reducingthe inclination of an actually measured image plane acquired by the photosensitive element to a second threshold value; and connecting the first sub lens with the second sub lens. The invention further provides a corresponding camera module. The camera module assembling method can increase the resolving power of the camera module; the process capability index of a large batch of produced camera modules can be increased; the entire cost of an optical imaging lens and module can be reduced; the disqualification rate can be reduced; the production cost is reduced; and the imaging quality is improved.

The invention discloses a preparation method of a zero shrinkage LTCC multi-layer ceramic substrate. The preparation method comprises the following steps: preparing a green ceramic body through laminating, sequentially placing one porous ceramic pressing plate and one porous silicon carbide pressing plate on the upper surface and the lower surface of the green ceramic body, putting into a pressure device, firstly heating up and discharging rubber, then heating up and sintering while pressure-assisted sintering is adopted, and then removing surface covering, so that the zero shrinkage LTCC multilayer ceramic substrate is obtained. The preparation method disclosed by the invention is simple and practicable and low in cost, shrinkage consistency of products can be effectively controlled, and shrinkage inter-chip repeatability can be controlled to be minus or plus 0.05%.

The invention discloses a microbial fermentation bed strain and a manufacturing method thereof. The microbial fermentation bed strain comprises the following components in percentage by weight: 50 to 70 percent of bacillus subtilis strain and 30 to 50 percent of saccharomyces cerevisiae. The strain adopted by the invention is safe and reliable; the production is low in cost, energy-saving and environmentally-friendly and adopts simple and controllable process; the pathogenic bacteria, parasite ova, grass seed and the like in packing can be killed; the strain can decompose livestock and poultry manure quickly, optimize breeding environment and convert the livestock and poultry manure into probiotic bacterium mycoproteins used for feeding the livestock and poultry, so the material to meat (egg) ratio is lowered effectively and breeding economic benefit is improved; and in a packing fermentation process, these kinds of bacteria have a mutually beneficial and symbiotic effect on the dynamic change of the pH value and the oxygen content, so a high constant stability is ensured in the long-term operation of the fermentation bed, and the requirement on the packing is low.

The invention discloses a surface texturing technology for a crystalline silicon solar cell. The surface texturing technology for the crystalline silicon solar cell comprises the following steps of (1), removing a mechanically damaged layer on the surface of a silicon chip through a sodium hydroxide solution with the concentration between 2 to 10 %; (2) mixing a silver nitrate solution with the concentration between 0.001 to 0.005 % and a hydrogen fluoride solution with the concentration between 0.2 to 1 % and depositing nano-silver particles from the mixed solution to the surface of the silicon chip; (3) mixing the hydrogen fluoride solution with the concentration between 10 to 15 % and a hydrogen peroxide solution with the concentration between 2 to 5 %, performing reaction between the mixed solution and the silicon chip with the nano-silver particles deposited and forming into holes in silicon chip positions around the nano-silver particles; (4) removing residual nano-silver particles inside the holes in the surface of the silicon chip through a dense nitric acid solution; (5) removing an oxide layer on the surface of the silicon layer through the hydrogen fluoride solution with the concentration between 5 to 10 %. The surface texturing technology for the crystalline silicon solar cell can reduce reflex losses and improve battery conversion efficiency.

The invention relates to an anode material of a sodium lithium ion secondary battery and citrate preparation method thereof, the material has a molecular formula of Na3V2(PO4)2F3, while the space group is P42/mnm, belonging to tetragonal system with cell parameter a = 9.047, c = 10.705. By using NaF, NH4VO3, NH4H2PO4 as raw materials, adding saturated citrate solution via stirring, in order to prepare citrate ligand; then drying and milling into powder for preburing; pressing the powder, and buring in a turbular furnace loaded with nitrogen at a temperature of 600 to 700 centigrade, finally cooling naturally. The synthesized material can charge and discharge between 3.0 to 4.5 volts, with primary charging capacity of 126mAh/g, discharging capacity of 123mAh/g, efficiency of 97.6%, excellent circulation ability, having characteristics of single-phase, excellent crystallinity, small particle size and stable structure.

The invention relates to an automatic pipeline-type pulp density detection system and method, and belongs to the field of industrial detection. The system consists of an automatic pulp sampling device, a weighing device and a measurement and control device, wherein the automatic pulp sampling device is arranged on a pulp pipeline; the weighing device is arranged under the automatic pulp sampling device; a measurement and control mainframe of the measurement and control device is arranged beside the automatic pulp sampling device or at the position in which the mainframe can be conveniently observed and operated; the rest parts of the measurement and control device are arranged on site. When being used for sampling, the system and the method are not influenced by the factor that the pipeline is not fully filled with pulp and are not strict to the requirements on pulp precipitation and sampling places, and have the characteristics of being wide in application scope and convenient to install and maintain; the system is capable of automatically detecting periodically, sampling, measuring, calculating and discharging; the detection accuracy is not influenced by the factors such as pulp composition, viscosity and bubbles; the detection system is comparatively independent, so that the relatively high detection accuracy can be obtained, and the comprehensive precision of the detection system is superior to that of a traditional nuclear densitometer.

The invention discloses a heat insulation waterproof anti-corrosive paint, which comprises 15-18 parts of polystyrene foam, 15-20 parts of petroleum resin, 6-10 parts of epoxy resin, 20-40 parts of xylene, 6-9 parts of butyl acetate, 8-20 parts of anti-corrosive pigments, 10-20 parts of heat insulation filler, 15-25 parts of heat insulation reinforcing materials, 7-10 parts of plasticizer and 0.5-2 parts of carbon black. The paint of the invention has good heat insulation, waterproof and anti-corrosive effects and is widely applicable to various buried pipelines, chemical pipelines and devices, steel frame structures, towers, iron products, cement buildings, mining machineries, ships, petrochemical processing storage tanks and environment protection engineering and can be used as the matched primer of various heat insulation paint; and moreover, the paint has loose requirements on the construction surface and can be directly brushed on the surface of a rusty member to realize a good protection effect, and the construction difficulty is low.

The invention discloses a connecting and separating device for satellite batch launching. The connecting and separating device comprises a base, docking mechanisms and a locking mechanism. The dockingmechanisms are connected with the satellite body, the multiple docking mechanisms are arranged in an overlapped mode, elastic mechanisms are arranged between two adjacent docking mechanisms and between the bottommost docking mechanism and the base, the two adjacent docking mechanisms are connected in an abutting mode through the corresponding elastic mechanism, and the bottommost docking mechanism is connected with the base in an abutting mode through the corresponding elastic mechanism. The base is connected with the docking mechanism through the locking mechanism, and the locking mechanismis used for fixing the docking mechanism to the base. By adopting the scheme provided by the invention, large-batch satellite launching can be simultaneously realized, the launching cost is greatly reduced, and guarantee is provided for satellite large-batch launching and constellation construction; the design meets the expandability of one-rocket multi-satellite launching and the uniformity of satellite design and manufacturing, all satellites are convenient to assemble and loose in requirement before launching, the safety requirement is met in the launching process, and on-orbit unlocking issafe and convenient.