1176results about How to "Stable performance" patented technology

The invention discloses zinc and zinc alloy plating black passivation solution and preparation method thereof. The passivation solution consists of 5 to 50g / L of trivalent chromic salt, 1 to 10g / L of auxiliary film forming agent, 0.2 to 10g / L of reducing agent, 2 to 15g / L of pH buffer agent, 1 to 50g / L of chelating agent, 0.5 to 10g / L of blackening agent, 1 to 50g / L of oxidant and 0 to 50g / L of pH regulator. The passivation solution has stable working solution performance and low cost, and is simple and convenient to operate and easy to learn; zinc and zinc alloy plated parts passivated by the working solution are black and bright, uniform in color and good in corrosion resistance, reach level 8 in 72 hours, and have good bonding force; and the plating solution and coatings totally contain no Cr(VI), and the Cr(VI) cannot be detected from workpieces placed for a long term, so the passivation solution has high market competitiveness and development potential.

The invention relates to an intelligent lithium ion battery management system for an electric vehicle. The management system is characterized in that a microcontroller module is connected with a power supply module, a data detection module, a charge-discharge control module, a safety protection module, a communication module, a data storage module and a balance management module. The balance control method comprises the following steps: carrying out balance self-inspection according to each collected single cell voltage data in a cell unit; if the balance self-inspection is successful, judging whether to start balance control; if the difference between the single cell voltage and the average value voltage is larger than a preset threshold voltage and the voltage of a certain single cell is larger than a preset threshold, carrying out balance control with PWM duty ratio obtained based on the single cell voltage being as balance time; or otherwise, giving up carrying out the balance control. The management system in the invention is a centralized battery management system, and has the advantages of small size, stable performance, high detection precision, low cost and high reliability and the like.

The invention provides a device for detecting the comprehensive performance of a high-speed precision ball screw pair, belongs to the technical field of detection of ball screw pairs, and relates to a device for detecting the comprehensive performance of an oiled and cooled high-speed precision hollow ball screw pair. The device is provided with a lathe bed of which an inner cavity has a U-shape groove structure; a power component is installed in the U-shape groove at the left end of the lathe bed; an angle encoder is arranged in a servo motor of the power component; an output shaft of the servo motor is connected with a torque sensor through a coupler; the coupler is installed between the torque sensor and the detected ball screw pair; the torque sensor is installed in the inner cavity of the lathe bed through a torque sensor support; an eddy current sensor is installed on a bracket of the eddy current sensor and the inner cavity of the lathe bed through a magnetic seat. The device can detect the comprehensive performance of different types of ball screw pairs, can be used for detecting multiple items, is particularly convenient to detect a hollow screw, is convenient to detect, install and adjust, wide in detection range and simple in structure and is provided with an electric pump.

A method and a device for processing metal materials with cryogenic laser shock belong to the fields of laser processing and subzero treatment. The device comprises a cryogenic treatment cavity, a laser, a liquid nitrogen tank, a temperature sensor and the like. The method is used for strengthening the materials in an ultra-low temperature environment by adopting the laser shock processing technology, insulating the materials for a period after the strengthening process, and heating the materials to be as hot as the ambient temperature. In the ultra-low temperature environment, the metal materials shrink, and a large quantity of dislocation is generated in the materials; due to the instant impact effect of the laser shock processing technology, the high-density dislocation in the materials moves at a high speed, so as to induce high-density nano twin crystal, which ensures that the materials have superior tenacity as well as high intensity, and brittle failure of the metal materials in the low-temperature environment can be avoided effectively; and a large quantity of nano educt is dissolved out from the materials, and the conversion of residual austenite as well as the thinning of martensite and crystal can be promoted effectively, which remarkably improves the mechanical properties and the mechanical properties of the materials.

The invention discloses a control method and a device of air-conditioning equipment and an air conditioning system. The control method comprises the following steps of: step S101, carrying out comparison on the water-outlet temperature of an evaporator and set object temperature, and determining the object load value of the compressor of the air-conditioning equipment; step S103, determining the variation of the load value of the air-conditioning equipment according to the object load value and the current load value of the compressor of the air-conditioning equipment; and step S105, adjusting the current load value of the compressor of the air-conditioning equipment according to the determined variation value. According to the invention, an object load is obtained through collecting the backwater temperature of an evaporator, the load of the compressor is adjusted according to the object load, and more accurate reference can be used for rationally adjusting a working mode of an air conditioner compressor; and the frequent adjustment of the compressor is avoided, the display of the system performance is more stable, and the service life of the compressor is guaranteed.

The invention relates to the technical field of network information security, in particular to a uniform resource locater (URL) lookup method. The invention combines a hash method and a multi-string matching method in the prior URL lookup method and provides a URL lookup method well meeting the requirements of performance and functions of a URL filtering system. Compared with the prior lookup method, the URL lookup method for the URL filtering system is quick in lookup, stable in performance and high in storage rate, can meet the storage requirements of a constantly increasing URL blacklist and supports premix matching. The URL lookup method is applicable to the URL filtering system, can realize the effective control of online behaviors of users conveniently and can also be used in other network applications such as search engine, web cache and layer-7 switching.

The invention discloses a preparation method of Ge-Sb-Se systematic infrared glass and atmosphere protective equipment for the method. The method comprises the following steps of: preparation of batch: mixing Ce, Sb and Se glass raw materials and a deoxidant to form the batch to be pre-treated; first melting: heating the batch to 850-900 DEG C to obtain first glass liquid; then, cooling and quenching the first glass liquid to form glass clinker; second melting: transferring the glass clinker to the atmosphere protective equipment; raising the temperature of a melting room to 650-750 DEG C, and stirring to uniformly and adequately homogenize the glass clinker to form second glass liquid; and cooling, then standing the second glass liquid for a period of time and finally carrying out material moulding. The glass provided by the invention has the advantages that the prepared Ge-Sb-Se systematic infrared glass is stable in composition and performance and uniform in inner quality, so that the imaging quality of Ge-Sb-Se infrared optical system is further improved.

The invention relates to an intelligent trash can. A bag feeding device, a bag opening device and a control circuit board are arranged in a shell of the trash can, the bag opening device comprises a fixed bag opening mechanism and a movable bag opening mechanism, the fixed bag opening mechanism comprises a first clamping plate, a first rotating shaft, a first bag opening motor, a first magnetic attraction portion and a first bottom plate, the movable bag opening mechanism comprises a second clamping plate, a second rotating shaft, a second bag opening motor, a second magnetic attraction portion, a second bottom plate and a horizontal drive assembly, the first clamping plate is rotatably mounted on the first bottom plate, the second clamping plate is rotatably mounted on the second bottom plate, the first clamping plate is in drive connection with the first bag opening motor, the second clamping plate is in drive connection with the second bag opening motor, the first magnetic attraction portion is arranged on the first bottom plate, the second magnetic attraction portion is arranged on the second bottom plate, and the second bottom plate is mounted on the horizontal drive assembly in a manner of being capable of horizontally moving; thus, automatic bagging can be achieved, the problems that a trash bag falls off, and a bag opening cannot be opened are solved, the performance is stable and reliable, the structure is ingenious and compact, production and machining are easy, the cost is low, and the market competitiveness is high.

The invention relates to wet process refractory mortar which comprises the following raw materials by weight: 25-50 parts of white fused alumina powder with the granularity of not more than 180 meshes, 40-65 parts of the white fused alumina powder with the granularity of not more than 320 meshes, 1-5 parts of phosphate binder, 1-4 parts of plasticizer, 1-3 parts of water retention agent, 0.1-1 part of resin type preservative, 0.05-0.5 part of preservative agent and 0-10 parts of Cr2O3 powder with the granularity of not more than 320 meshes, the wet process refractory mortar is prepared by uniformly stirring the raw materials, adding 12-18 parts of water, continuously uniformly stirring, and then loading into a plastic bag for sealing and preserving, and the preservation period is a year and a half to two years.

The invention provides an environment-friendly water-based nano coating material used for concrete protection, and a preparation method thereof. The environment-friendly water-based nano coating material comprises 15%-65% of an organic silane coupling agent, 0.5-10% of nano silica, 0.5-5% of nano titanium dioxide, 0.4%-4% of an organosilicon oligomer, 0.3%-3% of an emulsifier, 0.1%-0.6% of a bactericidal anti-algae agent, 0.01%-0.1% of a regulator, and the balance being deionized water. The environment-friendly water-based nano coating material used for the concrete protection takes advantages of a nanometer effect of nanoparticles and a hydrophobic effect of long-chain organosilicone coupling agent. The prepared environment-friendly water-based nano coating material used for the concrete protection has excellent protection performance.

The present invention relates to an organic eletroluminescent element comprising an anode, an organic luminous layer, an electron-injection layer and a cathode, in which the electron-injection layer comprises a metal oxide or a metal halide, and a material different from the metal halide or metal oxide.

In automatic steering control, when both a traveling lane and a preceding vehicle are detected, a target position on a first vehicle traveling path based on traveling lane information and a target position on a second vehicle traveling path based on preceding vehicle information are set as a first target position and a second target position, respectively. When the second target position is set farther than the first target position, the correction amount of the distance between the first target position and the second vehicle traveling path is set in accordance with the distance difference in the front-rear direction between the first and second target positions, and a third target position is set by correcting the first target position by the correction amount so as to become closer to the second vehicle traveling path. The steering control amount is calculated on the basis of the third target position.

The invention relates to the manufacture technical field of polysilicon ingot furnaces, and aims to provide a closed cooling system of a gas cooled polysilicon ingot furnace. The system comprises a heat exchange platform positioned on a supporting column and used for placing a crucible, wherein a cooling gas channel is arranged in the heat exchange platform; a gas inlet and a gas outlet at two ends of the cooling gas channel are respectively connected with a cooling gas inlet pipeline and a cooling gas outlet pipeline; and the heat exchange platform, the cooling gas inlet pipeline, the cooling gas outlet pipeline, a cooling gas power pump group and a cooler form a closed circulation loop of the cooling gas. Compared with the cooling method of radiation cooling and water cooling, the system related by the invention has strong gas cooling control capacity and high industrial controllability; the gas is fed into the heat exchange platform evenly, so that the whole temperature of the heatexchange platform is even, which is in favor of even nucleation of a silicon melt at the bottom of the crucible; and the reducing speed of the temperature at the bottom of the crucible can be precisely controlled during the crystal growth.

The invention provides an inorganic mixed phase-change material for heat accumulation, which has stable performance, small supercooling degree and large phase-change heat. The inorganic mixed phase-change material for heat accumulation is formed through evenly mixing the following compositions in mass portion: 80 to 88 portions of sodium acetate trihydrate, 1 to 10 portion of carboxymethyl cellulose, 0.5 to 3.5 portions of disodium phosphatedodecahydrate, 0.1 to 2.5 portions of sodium carboxymethylcellulose, 5 to 10 portions of sodium chloride solution with mass concentration of between 20 and 30 percent and 0 to 10 ppm portions of nanometer copper powder. The inorganic mixed phase-change material is mainly applied to heat accumulation for an air conditioner and can be also used for other heat accumulation systems (solar energy, waste heat utilization and the like). The material solves two difficult problems of supercooling and precipitation, and has stable performance, small supercooling degree and phase-change heat. Simultaneously, after phase change, the prepared phase-change material at a liquid state has good fluidity and wide application occasions.

The invention relates to a copper-zinc alloy current collector for inhibiting lithium dendrites. A conventional current collector is covered with a layer of copper-zinc alloy, the thickness of the copper-zinc alloy is 10 nm to 1 [mu]m, and the zinc atom content of the copper-zinc alloy is 1-5%. The copper-zinc alloy current collector provides more active sites for lithium metal deposition than theconventional current collector, and a button battery is assembled in a glove box full of argon by using a metal lithium-loaded alloy current collector or a common copper foil as a negative electrodeand adopting a Celgard 2325 diaphragm and metallic lithium as a reference electrode and a counter electrode. Deposition / dissolution experiments are carried out with blue electricity. The current density is 0.5 mA cm<-2>, the voltage lag is significantly increased after the copper foil electrode only circulates for 520 h, and a copper-zinc alloy negative electrode still maintains a small voltage lag after 1000 h circulation. The current collector in the invention is applied to a lithium-lithium iron phosphate a battery, and the electrochemical performances of the battery are obviously better than those of a battery using a metallic lithium negative electrode adopting the common current collector.

The invention discloses a method for modifying superfine fiber synthetic leather based on an amino-terminated hyperbranched polymer. The amino-terminated hyperbranched polymer is introduced into superfine fiber synthetic leather base cloth subjected to moderate acid hydrolysis through a cross-linking agent capable of crosslinking with amino and carboxyl to increase amino active groups, and then the cross-linking agent is added again to crosslink with gelatin hydrolysate to improve binding capacity of the gelatin hydrolysate and remarkably increase hydrophilic groups inside the base cloth. Simultaneously, a conventional natural leather processing technology is adopted to perform dyeing, grease adding, coating, middling and other operations to modified base cloth, and an imitated natural leather product with performance nearly equal to the natural leather performance is produced. By means of the method, hygienic performance and dyeing performance of products are nearly equal to those of the natural leather, and the products have elasticity, fullness and natural appearance of natural leather products. Simultaneously, the method does not relate to organic solvents, thereby solving the problem that a large number of organic solvents are used in the finishing process after existing superfine fiber synthetic leather is synthetized.

The invention provides a concrete polycarboxylate water reducer, which is shown in the formula (A), wherein R1 is alkyl having 1 to 10 carbon atoms, R2 is alkyl having 1 to 10 hydrogen or carbon atoms, R3 is H or COOH, and R4 is H or CH3. The water reducer has stable performance and high water-reducing rate and slump retention. The invention also provides a preparation method of the water reducer, which has the advantages of simple process, convenience for operation, environmental friendliness, low energy consumption and the like.

The invention relates to a polypyrrole / organic montmorillonite nano-composite, using polypyrrolidone to make organic intercalation modification on sodium-base montmorillonite, then using water as medium, and on the condition of blending agent, using oxidant to make chemical polymerization reaction on the pyrrole monomers between organic modified montmorillonite interlayers so as to obtain it. It can use as conductive additive of polyamide curing epoxy resin emulsion to make water-borne epoxy-series antistatic coating, sealant, adhesive, etc.

Into an electrolytic bath storing water to be treated, saturated sodium chloride solution identified as an electrolysis accelerator is added from an electrolysis accelerator bath. The water to be treated is subjected to electrolysis. In the electrolytic bath, water to be treated is introduced from an inlet during the electrolysis process. The water subjected to electrolysis in electrolytic bath is output to a reservoir via an overflow port. A plurality of electrode pairs are provided in the electrolytic bath. During the electrolysis process, the value of the current flowing across the electrodes of the electrode pair arranged most upstream of a water channel from the inlet to the overflow port in the electrolytic bath is detected, and control is provided such that the current value is within a predetermined range by adjusting the concentration of the accelerator in the electrolytic bath.

The invention provides a preparation method of oil-water separation filter paper, belonging to the technical field of functional materials. The method comprises the following steps of: (1) sequentially adding ethyl orthosilicate and ammonia water into ethanol for reacting, and standing over night for aging; (2) adding octadecyltrichlorosilane into the aged mixed liquor, magnetically stirring, washing with ethanol, centrifuging, and drying to obtain hydrophobic silica particles; (3) preparing a tetrahydrofuran solution of polystyrene; (4) preparing hydrophobic silica / polystyrene / tetrahydrofuran mixed liquor; and (5) A: soaking filter paper into the mixed liquor, taking the filter paper out of the mixed liquor, putting the filter paper in clean watch glass, and drying at room temperature to obtain the oil-water separation filter paper; or (B) horizontally paving filter paper into clean watch glass, sucking a certain amount of mixed liquor, uniformly coating the mixed liquor on the surface of the filter paper, and drying at room temperature to obtain the oil-water separation filter paper. The method provided by the invention has the advantages of simple process, low economic cost, short period, small energy consumption, no need of complicated special equipment and no subsequent problem, thus the method has wide application prospects in the future.

A circulation duct circulates dry air, which has been jetted to a photosensitive material, in a dryer. A temperature sensor is disposed near an entry of the circulation duct to detect a temperature of the circulation air. A controller obtains temperature information of the circulation air from the temperature sensor. On the basis of the temperature information, a heater is controlled to adjust a temperature of the dry air. When the temperature of the circulation air decreases, the temperature decline is simultaneously detected to raise the temperature of the dry air. Thus, the temperature of the dry air is fixedly kept, and dry processing of the photosensitive material becomes stable. Further, a drying speed is prevented from lowering.

The invention discloses a manufacturing method of a high-power base plate effectively integrating a circuit board and a radiator, belongs to the field of electronic printing circuit board and electronic element radiation, and particularly discloses the high-power base plate effectively integrating the circuit board and the metal radiator and having higher radiating performance and the manufacturing method thereof. The structure of the high-power base plate comprises a metal heating panel (1), and is characterized in that: a heat-conducting and insulating ceramic circuit layer (2) is coated on the metal heating panel (1); a copper foil circuit (3) is arranged on the heat-conducting and insulating ceramic circuit layer (2); a welding spot (5) is arranged on the copper foil circuit (3); and waterproof insulating paint (6) is sprayed onto the areas, except the welding spot (5) and an electronic element mounting area (4), on the surface of the metal heating panel (1). Compared with the prior electronic element radiation mode, the high-power base plate is high in heat-radiation efficiency and stable in performance, and has cheap and readily available raw materials. The method is evolved from the traditional mature process and is suitable for mass production.

A cathode reduction process for treating the surface of multi porous silicon includes such steps as suspending a wet P-type monosilicon wafer attached with multi porous silicon on its surface in a corroding tank, pouring a corroding liquid prepared from HF, water and absolute alcohol, applying electric current reversely for cathode reductino, washing and drying the mantioned monosilicon wafer. Its advantages are simple equipment and easy control to precision.

The invention relates to an optical fiber-wireless mixed type sensing monitoring system relating to the technical field of optical fiber sensing networks and wireless sensing networks and aiming at solving the problems of large size, high cost, high power consumption, difficult realization of small-size and high-integration wireless optical fiber sensing of an optical interference demodulation or wavelength detection device of the traditional wireless optical fiber sensing system. The optical fiber-wireless mixed type sensing monitoring system comprises a pump light source, an isolator, a wavelength division multiplexer, a multi-longitudinal mode optical fiber laser sensor, a photoelectric detector, a No.1 amplifier, a No.2 amplifier, a wireless transmitting device, a wireless receiving device and a frequency meter, wherein the pump light source is connected to the input end of the isolator; the isolator is connected with the wavelength division multiplexer; and the wavelength division multiplexer is connected with the multi-longitudinal mode optical fiber laser sensor. In the invention, an optical demodulation part in the technology does not needs the huge optical interference demodulation or wavelength detection device, and the demodulation of an optical fiber sensor can be realized by utilizing the photoelectric detector and the frequency meter, and therefore, an all-electronic demodulation-wireless transmission process is realized; and in addition, the invention is suitable for the technical field of the optical fiber sensing networks and the wireless sensing networks.

The invention provides an adipocyte protective solution. The protective solution is mainly prepared by dissolving a low-oxygen protective agent, vitamin C and aminoglycoside antibiotics with an aqueous solution of DMEM / F12 medium. Each 1 mL of the aqueous solution of DMEM / F12 medium is respectively used for dissolving 5-10 mg of the low-oxygen protective agent, 10-50 micrograms of the vitamin C and 50-200 U of the aminoglycoside antibiotics. Concentration of the aqueous solution of DMEM / F12 medium is 30-40 mg / mL. The adipocyte protective solution has stable performance, can preserve adipocyte for a long time, has effects of effectively keeping activity of adipose-derived stem cells and protecting adipose-derived stem cells, can enhance proliferation capacity of adipose-derived stem cells, can meet the requirement of transporting adipocyte to most areas of the country and surrounding countries, is safe and nontoxic, and can be directly applied to human body.

The present invention provides a method of production of grain-oriented electrical steel sheet comprising making a slab heating temperature 1280° C. or less, annealing hot rolled sheet by (a) a process of heating it to a predetermined temperature of 1000 to 1150° C. to cause recrystallization, then annealing by a temperature lower than that of 850 to 1100° C. or by (b) decarburizing in annealing the hot rolled sheet so that a difference in amounts of carbon of the steel sheet before and after annealing the hot rolled sheet becomes 0.002 to 0.02 mass % and performing the heating in the temperature elevation process of the decarburization annealing under conditions of a heating rate of 40° C. or more, preferably 75 to 125° C. / s while the temperature of the steel sheet is in a range from 550° C. to 720° C. and utilizing induction heating for rapid heating in the temperature elevation process of decarburization annealing.

The present invention relates to an electrode of electrolytic capacitor, in particular, it is an positive electrode of the electrolytic capacitor which is prepared by using columbium monoxide or doped columbium monoxide and its making method. It is characterized by that using columbium monoxide or doped columbium monoxide whose average grain size is 0.1 micrometer-20 micrometers as raw materials, and making it undergo the processes of pressing to make blank, vacuum sintering and energizing positive electrode block so as to obtain the invented columbium monoxide electrolytic capacitor positive electrode. Its energizing liquor is 0.01%-0.1% H3PO4, energizing voltage Vf is 10V-80V, energizing temp. is 10-90 deg.C, energizing current density is 10 mA.g(-1)-120 mA.g(-1), and time for constant voltage is greater than or equal to 0.5h. Said obtained positive electrode of electrolytic capacitor is stable in performance, high in specific capacity and small in leakage current.

The invention discloses a preparation method of nano iron oxide yellow or nano iron oxide red. The preparation method comprises the following steps: (a) adding a polymerization inhibitor in a ferrite solution with iron ion concentration of 0.05mol / L-1.2mol / L, and dropwise adding a precipitator until the pH value is 3.5-5.0 so as to form a reaction system; (b) continuously reacting for 90-120 minutes to obtain a product after dropwise adding an oxidant in the reaction system; (c) filtering the product obtained from the step (b), washing and drying the obtained filter cake so as to obtain the nano iron oxide yellow; and (d) firing the nano iron oxide yellow obtained from the step (c), cooling the fired nano iron oxide yellow to obtain the nano iron oxide red. By using the method, the particle size of the product can be effectively controlled between 20-100 nanometers, and the nano iron oxide yellow and nano iron oxide red are obtained by subsequent processing; and the method has the characteristics of simple process, small pollution, low energy consumption and short period.

The invention discloses an image evaluation index establishing method for nondestructive diagnosis of crop nitrogen nutrition. The method comprises the steps that wheat canopy images and the nitrogen content of leaves are obtained; the wheat canopy images are subjected to partition extraction, average pixel values of R, G, B, H, S and I components of all non-zero pixel points of leaves in each wheat canopy image are calculated to serve as basic color characteristic parameters r, g, b, h, s and i; nine image characteristic parameters r, g, b, r-g-b, r-g, r-b, (r-g-b) / (r+g+b), (r-g) / (r+g+b), and (r-b) / (r+g+b) are calculated; CMI=(xr-yg-zb) is established, fitting with the nitrogen content of the leaves is carried out, weight coefficients x, y and z are determined, CMI is subjected to standardized processing, and it is determined that NCMI=(xr-yg-zb) / (r+g+b). The NCMI established in the method is a relatively-proper winter wheat nitrogen nutrition evaluation index, accuracy and stability are achieved, and the crop nitrogen content can be quantitatively evaluated.