185results about How to "Expensive to fix" patented technology

The invention discloses tin-doped silver-wrapped base metal slurry of a back electrode of a solar cell, and a preparation method of the tin-doped silver-wrapped base metal slurry. The tin-doped silver-wrapped base metal slurry comprises an adhesive, silver-containing powder and a diluent, wherein the silver-containing powder is formed by mixing silver powder, tin powder, silver-wrapped base metal powder and glass powder; and the silver-wrapped base metal powder refers to at least one of silver-wrapped nickel powder and silver-wrapped copper powder. By replacing part of pure silver powder by the silver-wrapped base metal powder, the problem of oxidation of pure base metal slurry in a sintering process of a cell piece can be solved, and the problems of high price and easiness in displacement of the pure silver powder can be solved; and furthermore, the tin powder is added into the slurry, so that the weldability and the adhesive force of the slurry are improved. Therefore, the tin-doped silver-wrapped base metal slurry is low in cost, adopts the simple preparation method, is suitable for industrial production, and has the advantages of low contact resistance, high cell conversion efficiency and high weldability and adhesive force.

The device includes voltage detection unit at net side, current detection unit at net side, device of picking-up fundamental current at load side, digital signal processor DSP and control system based on DSP, generator of pulse-width modulation, inverter and LC filter. Structure and control method of combining unsmoothed nonlinear control with observer of expanding state are utilized in the invention. Output, derivative and unknown internal and external interference are observed through observer of expanding state. Harmonic opposite phase compensation is converted to tracking of ideal sine signal. Wattless dynamic compensation is realized through voltage-controlled reactor so as to reduce capacity of inverter to minimum and play filtering action. The invention integrates active filtering, passive filtering and wattless dynamic compensation.

The invention relates to a noncontact optical volume measurement method for complex-surface and irregular objects. The method is based on the volume measuring technology of image processing. The method comprises the steps of camera calibration, image acquisition, image preprocessing carried out through filtering to remove interference information in an image, image binarization processing, image pixel and graphic height calculation, object base area calculation, and volume calculation. The problem that measurement of the volume of an object requires contact with the object currently is solved, the problems such as the need for three-dimensional image reconstruction and object three-dimensional data point generation and long measuring time in the process from image processing to volume calculation are solved, and the problem that computed tomography (CT) scanning and laser scanning equipment and other testing equipment are expensive is solved. By using the device to measure the volume of a complex-surface object, the advantages of high measuring speed, high precision and convenient operation can be achieved.

The invention discloses a low-cost counter electrode and a dye-sensitized solar battery manufacturing process by utilizing the counter electrode, belonging to the technical field of green renewable energy sources; the counter electrode is characterized in that: molybdenum carbide (Mo2C), tungsten nitride (W2N), molybdenum nitride (Mo2N), vanadium carbide (VC), vanadium nitride (VN), niobium carbide (NbC), niobium nitride (NbN), and wolfram carbide (WC,W2C) are used as material of the counter electrode, inorganic crystalline material is used as bonder and is dispersed in organic solvent or aqueous solution for manufacturing slurry, and the counter electrode is manufactured by utilizing spraying, printing, blade coating methods, and the counter electrode and light anode and electrolyte are assembled into the dye-sensitized solar battery. The preparation process is simple, high temperature and high pressure do not need in the manufacturing process, the process is no toxic and environmental-protection, the electrode with high efficiency and low cost can be manufactured easily, and the process is suitable for manufacturing various dye-sensitized solar batteries.

The invention relates to a vehicle detection and tracking method. An existing system is too expensive and cannot achieve the practical application. According to the method, a detection module built byan SSD algorithm and MobileNts and a tracking module built by a particle filtering algorithm and a CamShift algorithm are adopted to carry out vehicle detection tracking, and an embedded mobile terminal is adopted in a development environment. According to the method, an SSD and MobileNts in a neural network are adopted, and the method is established with a traditional target tracking CamShift algorithm and particle filtering, and comprises a vehicle detection method and a vehicle tracking method. The method plays a key role in the aspect of unmanned driving, not only solves the difficultiesof most important vehicle detection and tracking directions in unmanned vehicle driving, but also can solve the problem of high hardware price, and has great practical significance and a wide application scene in the aspect of improving social and economic benefits.

The invention discloses a fatty alcohol-polyoxyethylene ether propionate surfactant and a preparation method thereof and an application thereof to tertiary recovery. In a specific scheme, a novel anionic surfactant is synthesized by performing addition and saponification reactions on alcohol ether, methyl acrylate and sodium hydroxide serving as major raw materials. The method has the advantages of simple process, no need of special equipment, low raw material cost, wide source, stable product performance, environment friendliness and economic efficiency. The fatty alcohol-polyoxyethylene ether propionate surfactant is completely different from the conventional nonionic and anionic surfactants for displacement of reservoir oil, and high surface activity, thermal stability, salt resistance, compatability and biodegradability are achieved by embedding an ethoxy group into an anionic surfactant long alkyl chain. After fatty alcohol-polyoxyethylene ether propionate is compounded with other surfactants, a very good synergistic effect is achieved, and ultralow interface tension can be formed on a water-crude oil interface. Moreover, the surfactant is a salt-resistant, temperature-resistant and alkali-free surfactant for displacement of reservoir oil.

The invention discloses an optical fiber array end surface tilt angle measuring instrument and an optical fiber array end surface tilt angle measuring method. The optical fiber array end surface tilt angle measuring instrument comprises a helium-neon laser device serving as a light source, a short-focal-length convergent lens, a fixed platform, a long-focal-length convergent lens, a frosted glass plate, a CCD and a computer, wherein the short-focal-length convergent lens is arranged behind the helium-neon laser device, the fixed platform is arranged behind the short-focal-length convergent lens, the long-focal-length convergent lens is arranged behind the fixed platform, the frosted glass plate is arranged behind the long-focal-length convergent lens, the CCD is arranged behind the frosted glass plate, and the computer is connected with the CCD. The optical fiber array end surface tilt angle measuring instrument provided by the invention projects an optical fiber array end surface tilt angle and amplifies a shadow of the end surface tilt angle through a lens group, directly measures the end surface tilt angle by utilizing high-precision angle measuring software, and is simple in structure, simple and convenient to operate, easy to match, low in cost and high in measurement accuracy.

The invention provides a method for preparing terephthalic benzonitrile. The method comprises the steps of taking biphenyl and trichloro-acetic chloride as raw materials and preparing theterephthalic benzonitrile through acylation, aminolysis and dehydration reaction. The method overcomes the disadvantages that the prior art is expensive in raw materials, high in intermediate toxicity, harsh in reaction conditions, low in reaction yield, poor in purity and the like, provides a terephthalic benzonitrile synthesizing process which is easy to industrialize, convenient to operate, high in yield and high in product purity, and provides a key raw material intermediate for producing the pigment red 264 with bright color and high quality.

The invention discloses a synthesis method for preparing a water-soluble biomass-based fluorescent carbon dot and application, and belongs to the field of nanometer material science and application. The biomass-based fluorescent carbon dot is prepared with cellulose and urea as raw materials through a hydrothermal method in one step, brown reaction liquid is obtained, centrifugation is conducted on the reaction liquid, supernate is taken, and precipitate is removed. A dialysis tube with the molecular weight cutoff of 5-10 kDa is selected for conducting dialysis and extraction on the supernate, and carbon dot solid is obtained through freeze drying. The carbon dot is prepared from cellulose which is low in price and capable of being easily obtained, waste resources are effectively used, and the defects that the preparation condition is rigor and raw materials are expensive are well overcome. In addition, the water-soluble biomass-based fluorescent carbon dot is good in water solubility, little in toxin and good in biocompatibility and is successfully used for cell imaging.

The invention provides a method for preparing a serum-free cultured suspension mammal cell line, which comprises the following steps: 1)recovering and culturing mammal cells to obtain adherent cultured mammal cells, digesting by pancreatin; 2)culturing the adherent cultured mammal cells by a serum-free medium added with a certain amount of serum, continuously culturing the mammal cells so as to adapt to the serum-free medium with the certain amount of serum; and 3)repeating the continuous cultivation process in the step 2), and gradually reducing the serum addition amount in the serum-free medium until the serum addition in the serum-free medium is 0 to obtain the suspension mammal cell line. According to the method, equalization nutrition of cells is obtained, vaccine stability and uniformity can be guaranteed, and the problems of side effect due to serum addition can be solved, risk due to exogenous pollution is reduced, stress reaction of animal is reduced, and subsequent processing is easy and simple.

The invention discloses a heavy metal ion adsorbing material. The heavy metal ion adsorbing material is prepared from the following components as raw materials in parts by weight: 50-60 parts of a cyclodextrin-based cucurbituril-based triazine copolymer, 20-30 parts of hyperbranched polyethyleneimine and 5-10 parts of graphene oxide. A preparation method of the heavy metal ion adsorbing material comprises the following steps: adding all the raw materials into a screw extruder according to the weight ratio, and blending and performing extrusion molding at 230 DEG C to 250 DEG C to obtain the heavy metal ion adsorbing material. The heavy metal ion adsorbing material disclosed by the invention has the advantages of low cost, good adsorption effect on heavy metal ions, high adsorption capacityand easy desorption.

The invention relates to a monitoring video processing system, which comprises an image acquisition module for acquiring a monitoring video; an intelligent analysis module is used for acquiring structured information of each element in the monitoring video and identifying a target element according to the structured information; a coding module is used for compressing and coding the target elementand the corresponding structured information; a transmission module is used for transmitting the coded target element and the structural information corresponding to the coded target element; and thestorage module is used for storing the coded target element and the corresponding structured information. On the other hand, the invention also provides a monitoring video processing method. Throughthe monitoring video processing system and method, the transmission bandwidth and the calculation energy consumption are reduced, a large amount of useless monitoring video data are accurately removedfrom the original monitoring video data, the intelligent degree is high, the false alarm rate is low, the problem of monitoring video data storage is solved, and the life cycle of the monitoring video data is indirectly prolonged.

This invention discloses jacking slurry used in pipe-jacking construction. The jacking slurry comprises: bentonite 6-14 wt.%, hydrolyzed NH4-HPAN 0.6-1.1 wt.%, carboxymethyl starch 0.5-0.9 wt.%, lubricant RH-3 0-2.5 wt.%, furnace slag 35-60 wt.%, NaOH 2.5-6 wt.%, sulfonated tannate of potassium 0.3-0.8 wt.% and water. The jacking slurry can solve the problem of surface subsidence in the jacking process of earth pressure balance shield pipe-jacking machine, and reduce frictional resistance.

The invention relates to an energy-saving rectifying device for integrating energy in a rectifying tower sequence and a method, wherein the device comprises a light component evaporating tower, a steam flow distributor, a steam mixer, a central condenser, a liquid flow distributor, a rectifying tower section of a light component refining tower, a stripping tower section of the light component refining tower, a reducing valve, and a flash vaporization vessel, wherein the light component evaporating tower does not have a ceiling condenser and is used for supplying high pressure steam to the rectifying tower section of the light component refining tower; the reducing valve and the flash vaporization vessel are arranged between the rectifying tower section of the light component refining tower and the stripping tower section of the light component refining tower; the internal heat exchange between the two tower sections not only can reduce the hot load consumption at the bottom of the stripping tower section of the light component refining tower, but also can reduce the condensing load consumption at the top of the rectifying tower section of the light component refining tower. Compared with the conventional multi-component rectifying and separating system, the device in the invention can greatly reduce the total energy consumption of the entire rectifying tower system, save the operation cost, and reach the purpose of saving energy and increasing efficiency.

The invention discloses a method for preparing methylacrylic acid-2, 2, 2-ethyl trifluoroacetate. The method adopts methylacrylic acid as the raw material, and the methylacrylic acid is reacted with thionyl chloride under the existence of DMF and polymerization retarder; the obtained methacrylic chloride is reacted with 2, 2, 2-ethyl trifluoroacetate under the existence of catalytic agent, then the target product of the invention-methylacrylic acid-2, 2, 2-ethyl trifluoroacetate-can be collected from the reaction product, the purity rate reaches more than 98 percent (GC), and the production rate is more than 95 percent. The reaction process condition of the invention is bland, the operation is secure and simple, the raw material sources are extensive, and the price is low; compared with the prior technology, the invention overcomes the deficiencies that the raw material price is expensive, the preservation and the transportation of the raw material are difficult, the reaction system request is harsh, the equipment corrosiveness is strong, the product quality is steady, the purity rate is good, the production rate is high, and the invention is suitable for large-scale industrialization production.

The invention provides a desk-top touch blind teaching device based on functional replacement of vision by touch. The desk-top touch blind teaching device comprises a teaching console, a touch display controller, a touch point, an upper arm angle sensor, an upper arm, a lower arm angle sensor, a lower arm, a finger-arm angle sensor, a touch display area and a desk, wherein, the teaching console is connected with the touch display controller which is connected with the touch point through the upper arm angle sensor, the upper arm, the lower arm angle sensor and the lower arm by wires; and the upper arm, the upper arm angle sensor, the lower arm and the touch point are placed on a desk in the manner of sequence cascade through the upper arm angle sensor. When a blind operator drives an arm link to move on the desk by the tip of a finger, the touch display controller can calculate in real time a touch graph-text pixel parameter at the position of the current touch point to cause the blind operator to perceive touch graph-text pixel information at the position of the current touch point in the manner of touch stimulation. The desk-top touch blind teaching device has simple structure and low cost and is convenient for use and characterized by real-time.

The invention provides a manganese-copper based composite oxide doped rare earth element catalyst for catalyzing volatile organic compounds (VOCs) as well as a preparation method and application of the catalyst. The catalyst disclosed by the invention adopts a high-pore-volume cordierite honeycomb ceramic material as a carrier, and the carrier is sequentially coated with a first metal oxide coating layer, a second metal oxide coating layer and a third metal oxide coating layer from the inside to the outside, wherein the first metal oxide coating layer is active aluminum oxide, the second metaloxide coating layer is a hafnium-lanthanum-cerium oxide, and the third metal oxide coating layer is a manganese-copper based oxide. The catalyst provided by the invention adopts a non-precious metalinstead of a precious metal; and the catalyst provided by the invention has uniformly-dispersed coating layers, binding force between an active component and a matrix is strong, the coating layers arenot easy to fall or crack, and the catalyst can maintain higher activity under high-speed airflow and thermal shock, has stable activity when being used repeatedly, strong catalytic activity to the VOCs, a simple preparation process and low costs, and is suitable for large-scale production.

The invention discloses a dyeing method of a reactive dye with a high color fixation rate. The dyeing method comprises the following steps: S1, pretreatment: padding a texture to be dyed in a finishing solution containing chitosan quaternary ammonium salt, dipping for two times, rolling for two times, prebaking at the temperature of 80 to 100DEG C, baking at the temperature of 110 to 130DEG C, washing with cold water and then drying; S2, reactive dyeing: immersing into a dyeing solution of the reactive dye, dyeing at the temperature of 20 to 30DEG C, raising the temperature to be 50 to 70DEG C, then adding an organic solvent B, and raising the temperature to be 80 to 100DEG C; adding sodium carbonate according to the volume of the dyeing solution of the reactive dye, insulating heat and reducing to room temperature; S3, performing after treatment, water washing, soaping, water washing and drying in air. The dyeing method of the reactive dye with the high color fixation rate, provided by the invention, has the advantages of high color fixation rate and good level-dyeing property; in addition, the process is simple, and industrial implementation is easily realized; meanwhile, chemical substances with high price and greater toxicity are prevented from being used.

The invention discloses a compact multi-spectral LED (Light-Emitting Diode) all-solid-state light source system comprising an LED power supply and a control circuit module; the LED power supply and the control circuit module are connected with a plurality of LEDs with different emission wavelengths; photons of each LED are respectively coupled into branch optical fibers of multi-split optical fibers via an input-end optical fiber head or an optical coupling device; and gathered photons of the LEDs are coupled on a sample via an output-end optical fiber head or an optical coupling device by an output master optical fiber of the multi-split optical fibers. In the invention, light beams are transmitted via multi-split branch optical fibers so that multi-spectral illumination at a same outgoing port is implemented and structures such as filter wheels, transmission motors and the like which are expensive in price and complex in structure are avoided. Through the use of the LED light source, the energy consumption and the cost are reduced. As the light beams transmitted via the optical fibers can be bent and the lengths of the light beams can be designed as required, the light source disclosed by the invention can be flexibly applied to various instrument systems.

The invention discloses a method for controlling composite braking of a rail electric engineering vehicle. The method comprises the steps: obtaining a first signal of braking force needed by the vehicle, calculating electric braking force capable of being provided according to actual running states of the vehicle, outputting a second signal of electric braking force which is actually provided according to the obtained first signal, comparing the first signal and the second signal, outputting a differential value signal of the first signal and the second signal, and controlling the output of air pressure of a function pipe according to a pressure value produced by the differential value signal. Through the method, the composite functions of electric braking and air braking can be achieved, the electric braking force can be utilized to the maximum extent, an energy utilization rate is improved, meanwhile, cost can be reduced, and operability of operators is improved. In addition, the invention discloses a device for controlling the composite braking with the method applied.

The invention provides a gas insulation transmission line, which comprises a shell and an inner conductor coaxial with the shell. The space between the shell and the inner conductor is filled with an insulating gas which is compressed air after being dried and purified. The pressure of the compressed air is 1.5Mpa to 2.5Mpa, the dust granularity thereof is smaller than or equal to 0.1Mum, oil content thereof is smaller than or equal to 0.01mg / m<3>, and the moisture content thereof is smaller than or equal to a condensation point of -70 DEG C. By adopting the compressed air after being dried and purified to substitute the insulating gas mainly containing SF6 in the conventional gas insulation transmission line, the gas insulation transmission line of the invention can not only play the role of insulation of the insulating gas in the conventional gas insulation transmission line, and simultaneously can enhance the environmental protection of the gas insulation transmission line.

The invention discloses a measuring method for achieving optical fiber dispersion based on laser beat frequency. A 980 pumping source sends out light with the wavelength of 980 nm, the light passes through a wavelength division multiplexer, is amplified through erbium-doped optical fiber, then passes through optical fiber to be measured, passes through an optical fiber resonant cavity formed by a circulator and an FP cavity narrow-band filter, then returns and sequentially passes through the optical fiber to be measured, the erbium-doped optical fiber and the wavelength division multiplexer, at the moment, the light reflected by a sagnac ring continues to be reflected in a light path graph, a part of light transmitted by the sagnac ring passes through a photoelectric detector and a spectrum analyzer, multiple sets of data are obtained on the spectrum analyzer by adjusting the cavity length of the FP cavity narrow-band filter, and a dispersion spectrum graph is obtained through processing of origin software. The problem that an existing dispersion measurement device in the marker is large in size and heavy and consumes long time is solved.

The invention discloses a metal antirust coating with modified steel slag-based pigment and filler replacing iron oxide red and a preparation method thereof. The metal antirust coating has the advantages of easily available raw materials, low price, excellent performance, simple process, convenience in operation and environmental friendliness. The metal antirust paint is composed of the followingcomponents in percentage by mass: 15-20% of a modifier, 15-30% of a steel slag-based pigment filler, 20-35% of a resin, 20-30% of a solvent, 25-10% of an auxiliary agent, and 3-5% of a coloring pigment filler. The metal antirust coating is prepared by four steps of preparation of a modified steel slag-based pigment and filler precursor, preparation of the modified steel slag-based pigment and filler, preparation of a metal antirust coating precursor and preparation of the product metal antirust coating.

The invention discloses peony seed coffee and a preparation method thereof. The peony seed coffee is prepared by mixing and pulverizing peony powder and coffee beans, wherein the content of the coffee beans accounts for 0-98 percent, and the peony powder is formed by mixing peony seed powder and peony root hair powder. According to the invention, the peony seeds pretreated replaces part of coffee, is prepared into powder for drinking after grinding, not only the proper nutritional value of the peony seeds and the physiotherapy value of the peony root hair are achieved, but also the taste and the perfume of the coffee cannot be influenced, the consumption of the coffee beans is reduced, and the using field of the peony seeds is expanded. Moreover, since the peony seeds and the peony root hair are used after being soaked in a peony scouring liquid, light peony fragrant is enabled to be available after brewing, and the product value is improved.

The present invention relates to a large-aperture reflection optical system detection device and method. The system comprises a pyramid prism array and a point light source emission and receiving device. The pyramid prism array is installed in front of a large-aperture reflection optical system to be detected, and bottom surfaces of all the pyramid prisms in the pyramid prism array just face the large-aperture reflection optical system to be detected; the aperture of the pyramid prism array is larger than the aperture of the large-aperture reflection optical system to be detected; a light beamemitted by the point light source emission and receiving device is incident into the large-aperture reflection optical system to be detected, is changed to a parallel light beam after passing throughthe large-aperture reflection optical system to be detected, is incident into the a pyramid prism array, is changed to a plurality of small-aperture parallel light beams being parallel to the incident light beam after passing through the pyramid prism array, is incident to the large-aperture reflection optical system to be detected, is changed to a gathering light beam array after passing throughthe large-aperture reflection optical system to be detected, and enters the point light source emission and receiving device. The large-aperture reflection optical system detection device and methodare low in manufacturing cost, and high in test precision with no need for intervention of any extra test special-purpose tools.

The invention discloses a kit and a detection method thereof for SNP detection of aspirin individualized medication related genes. The kit consists of two forward primers and a reverse primer for detecting rs10306114 site of a PTGS1 gene, two forward primers and a reverse primer for detecting rs1057910 site of a CYP2C9 gene, two forward primers and a reverse primer for detecting rs2836051 site of a CYP2D6 gene, and two forward primers and a reverse primer for detecting rs12248560 site of a CYP2C19 gene. With the application of the kit provided by the invention, high-throughput detection can be conducted on the four sites and a genotyping results can be intuitively distinguished through software, so that the purposes of conducting quantitative control on aspirin measurement and reducing side effects to the greatest extent are achieved.

The invention discloses a self-healing cement-based capillary crystalline waterproof coating and a preparation method thereof. The material is prepared from the following raw materials in percentage by mass: 35%-55% of Portland cement, 30%-45% of quartz sand, 5%-8% of quick-setting and quick-hardening cement; 4%-8% of graphene modified steel slag micro powder, 1%-2% of calcium carbonate, 1%-1.5% of anhydrous sodium sulphate and 1%-2% of core master batch, the core master batch is a mixture of bentonite, citric acid and isobutyltriethoxysilane, and the mass ratio of the bentonite to the citricacid to the isobutyltriethoxysilane is 100: (30-40): (5-10), the thickening agent accounts for 1%-%2, wherein the total content of the raw materials is 100%. The cement-based capillary crystalline waterproof coating is good in self-healing performance and low in price, and the strength and the cracking resistance are improved.

Peony element coffee and a preparation method thereof. The peony element coffee is prepared by mixing and grinding peony elements and coffee beans; the coffee bean content is 0-98%; and the peony element is a mixture of peony seeds and peony bark. According to the invention, pretreated peony seeds and peony bark are used instead of part of coffee, are grinded into powder for drinking, not only have both the nutrition value of peony seed itself and the physiotherapy value of peony bark, but also have no influence on coffee taste and fragrance; the consumption of coffee beans is reduced, and the application field of peony seeds and peony bark is widened. Meanwhile, the peony seeds and peony bark are used after being soaked with peony soaking liquid, which provides light peony flower fragrance for the peony element coffee after infusion, and increases the product value.

The invention discloses a calcium hexaluminate blue ceramic pigment and a preparation method thereof. The blue ceramic pigment is prepared from cheap aluminum hydroxide (Al(OH)3), titanium hydroxide (Ti(OH)4), nickel oxide (NiO) and calcium carbonate, so the problem of high price of cobalt in cobalt blue is overcome. The blueness b* of the prepared blue ceramic pigment reaches -37.07, which is close to the b* value of cobalt blue.