Patents
Literature
Hiro is an intelligent assistant for R&D personnel, combined with Patent DNA, to facilitate innovative research.
Hiro

230results about How to "Prevention is cheap" patented technology

Modular system having expandable form factor

A modular system of devices, in which a (master) device can be combined with one or more of other (slave) devices to transform to functional electronic devices having expanded functionalities and features in different form factors and / or platforms. The master device is docked to the slave device via a data / electrical interface, to transform the master device to the larger form factor of the slave device, with the master device maintaining control of the slave device, substantially based on the operating system installed in the master device, with access to the data, application programs, functionalities and features embodied in the master device. An intermediate removable physical interface adaptor (or docking adaptor) is provided to facilitate docking compatibility of the master device to the slave device. An enhanced charging and power management scheme is provided to optimize power management for the master device and the slave device.
Owner:COMPAL ELECTRONICS INC

Method for producing yellow humic acid from grass type stalk

The invention relates to a method for preparing fulvic acid with grass straws. The method comprises: pulp is made from cellulose in the straws and is used a raw material of paper pulp; in a pulp making process, lignin is dissolved in a cooking liquor to be used as a main component of solid in a black liquor; as the lognin is fully refined after being steamed and boiled, the lognin good organic fertilizer that is easy to degrade and can be absorbed easily by crops; and at the same time, in the pulp making process, a considerable amount of fulvic acid is generated under high-temperature high-pressure conditions, so the black liquid after shoving can be used for extracting high quality fulvic acid. The method can realize comprehensive utilization of grass straws through the above steps and can achieve good economic benefits due to the expensive paper pulp, lignin and fulvic acid.
Owner:SHANDONG TRALIN PAPER

Electric power steering system of new energy vehicle and control method of electric control unit thereof

The invention discloses an electric power steering system of a new energy vehicle and a control method of an electric control unit thereof. The electric control unit comprises an input circuit which is used for connecting with a sensor part, an MCU and an output circuit which is used for connecting with an actuator part, wherein both ends of the MCU are connected with the input circuit and the output circuit; the control method adopts an improved PI algorithm; integral separation and dead zone processing are carried out, and the smooth and steady follow of power torque under the condition of low cost of hardware is realized by the current closed-loop control of the variable parameter PID based on vehicle speed grouping; the duty ratio nonlinear compensation technique is adopted in the mode of limited bipolar pulse width modulation; the duty ratio is corrected by the current in the limited bipolar mode. When the current is across a dead zone, namely when the target current is changed from positive to negative or from negative to positive, and when the power is from zero to existence, the duty ratio is directly arranged near the target current value to be accurately adjusted by the current closed-loop feedback, and the current of the motor can reach the target value.
Owner:SHANDONG TIANHAI TECH

Method for extracting astaxanthin from haematococcus pluvialis

The invention belongs to the technical field of medicines, and relates to a method for extracting astaxanthin from haematococcus pluvialis. The method comprises the steps of culturing a seed stock solution in a glass apparatus with a drainage system, and carrying out later amplification culture of the haematococcus pluvialis and accumulation culture of the astaxanthin after 10-15 d; centrifuging a culture in an exponential growth period of seed culture; and inoculating cell clusters in a BBM basal medium to obtain a primary culture. The later accumulation culture of the astaxanthin is amplification culture by using a breathable plastic bag type simple device provided by the invention. In the accumulation stage, a stress culturing method is adopted to obtain a lab-scale test haematococcus pluvialis culture; and haematococcus pluvialis powder is obtained by spray drying. According to a preparation technology that extracts astaxanthin from the haematococcus pluvialis by adopting an ultrasonic cell disruption assisted mixed solvent extraction method, the haematococcus pluvialis powder is added in an organic solvent to carry out ultrasonic cell disruption, and then the astaxanthin is obtained by the steps of reflux extraction in a water bath, suction filtration, filtrate merging and concentration. Compared with a conventional direct extraction method, the method provided by the invention saves extraction time, and increases astaxanthin yield.
Owner:SHENYANG PHARMA UNIVERSITY

Method for recovering tetrahydrofuran from Grignard reaction waste residue of magnesium chloride

The invention relates to a method for recovering tetrahydrofuran from Grignard reaction waste residue of magnesium chloride. The method comprises the following steps: (1) dissolving and distilling: respectively adding the waste residue of magnesium chloride and water to a reaction kettle; stirring to be fully dissolved; heating so that tetrahydrofuran solvent is dissociated and continuously vaporized; then, condensing into liquid, receiving to obtain a crude product A; (2) drying and dewatering: drying by alkali and a molecular sieve until water content is smaller than 0.1 percent; standing still and precipitating, transferring clear liquid at an upper layer to a filter; filtering to obtain a crude product B; (3) rectifying: transferring the crude product B to a tower kettle of a rectifying tower; heating to vaporize and regurgitate the tetrahydrofuran in the rectifying tower; slowly distilling a front cut fraction after regurgitation is lasted for 1-2 hours until the tetrahydrofuran content is larger than 99.8 percent, and starting to collect a boiling reagent to obtain the rectified tetrahydrofuran. The technical scheme of the invention greatly lowers the unit consumption of thetetrahydrofuran in the Grignard reaction and has simple and convenient treatment method and low cost.
Owner:SHANGHAI YIMIN CHEM

Rice planting method for obtaining rice planted in field with frog

A rice planting method for obtaining rice planted in a field with frogs belongs to the technical field of the stereo ecological effective production combining scientific planting and culturing. The rice planting method is as follows: frogs are cultivated while rice is planted in the rice field; specific measures are as follows: a waterhole is arranged at a water inlet of the rice field; a ditch isarranged along the periphery of ridge of the rice field; a plastic thin film with 1.2m height surrounds a defensive wall which preventing the frogs from escaping on the periphery of ridge of the ricefield; mound for the wintering of the frogs is arranged in the rice field; after rice is planted in the rice field, the water depth needs to be kept over 3cm; about five thousands of frogs are cultivated per acre. Growing environment of the rice is used for cultivating the frogs which prey on pests and other insects growing in the rice field; excrement of the frogs is used as fertilizer of rice growing. Water body resources and ecology environment of the rice field are fully utilized by cultivating the frogs in the rice field, thus being capable of achieving effects of rice and frog intergrowth and mutual benefit, efficiency improvement and energy consumption. The rice planted in the field with the frogs is pure green superior rice with high grade; and the frogs have very high economicalvalue.
Owner:林贵夫

Modular system having expandable form factor

A modular system of devices, in which a (master) device can be combined with one or more of other (slave) devices to transform to functional electronic devices having expanded functionalities and features in different form factors and / or platforms. The master device is docked to the slave device via a data / electrical interface, to transform the master device to the larger form factor of the slave device, with the master device maintaining control of the slave device, substantially based on the operating system installed in the master device, with access to the data, application programs, functionalities and features embodied in the master device. An intermediate removable physical interface adaptor (or docking adaptor) is provided to facilitate docking compatibility of the master device to the slave device. An enhanced charging and power management scheme is provided to optimize power management for the master device and the slave device.
Owner:COMPAL ELECTRONICS INC

Methanol gasoline rubber anti-swelling agent

The invention relates to a methanol gasoline rubber anti-swelling agent and belongs to the field of alcohol ether fuel additives. The methanol gasoline rubber anti-swelling agent consists of 30 to 60 percent of fatty alcohol, 10 to 30 percent of calcium petroleum sulfonate, 8 to 20 percent of sulfonate, 7 to 18 percent of synthetic calcium sulfonate salt and 2 to 15 percent of alkylphenol calcium salt in percentage by weight. 0.012 to 0.028 percent of industrial product of the methanol gasoline rubber anti-swelling agent is added in methanol gasoline with different brands of between M15 and M100 and can reduce the volume swelling of the rubber by 40 to 46 percent. After methanol gasoline added with the methanol gasoline rubber anti-swelling agent is used in an automobile, the driving journey is 50,000 kilometers; compared with the methanol gasoline without methanol gasoline rubber anti-swelling agent, the test shows that the volume swelling of the rubber is reduced by 45 to 50 percent. Compared with lead-free gasoline, the test shows that the swelling rate of the methanol gasoline added with the methanol gasoline rubber anti-swelling agent is equal to that of the lead-free gasoline and achieves the equivalent effect with the lead-free gasoline. The methanol gasoline rubber anti-swelling agent has the characteristics of low cost, easy preparation, convenient use, good effect and the like.
Owner:占小玲

High-frequency switching circuit, high-frequency module, and wireless communications device

The present invention provides a high-frequency switching circuit comprising: two or more high-frequency switches SW1 and SW2 provided correspondingly to a plurality of communication systems having mutually different frequency bands; and a control circuit DEC1 adapted to control the switching of the two or more high-frequency switches SW1 and SW2, in which a common antenna terminal ANT3 and common terminals ANT1 and ANT2 of the respective high-frequency switches SW1 and SW2 are connected via a matching circuit MAT1 having a filtering function capable of allowing passage of direct current. When one path of the high-frequency switch SW1 is turned on, the other paths of the high-frequency switch SW1 and all paths of the high-frequency switch SW2 can be turned off.
Owner:KYOCERA CORP

Method of rapidly determining fluoroquinolone type medicines in faeces of livestock and poultry

The invention relates to a novel method of extracting fluoroquinolone type medicines in faeces of livestock and poultry. The method includes 1) grinding a freeze-dried sample of faeces of livestock and poultry, and sieving; 2) weighing 0.50-1.00 g of the sample, adding into a centrifuge tube, adding 5-10 mL of a calcium chloride-hydrochloric acid buffer solution having a concentration of 50%, performing vortex mixing for 1 min, performing ultrasonic extraction for 15-30 min, centrifuging at a speed of 4500 r/min for 10 min, and collecting the supernate; 3) separately subjecting standard samples of one or more than two of the fluoroquinolone type medicines to qualitative analysis by a high performance liquid chromatography instrument, and determining retention time; 4) creating a standard curve for each fluoroquinolone type medicine compound by adopting peak area as a vertical coordinate and adopting a concentration (ng/mL) corresponding to each fluoroquinolone type medicine as a horizontal ordinate; and 5) measuring the content of each target compound in the sample to be measured by high performance liquid chromatography, determining the type of each target compound according to the retention time, and determining the content of each target compound according to the corresponding standard curve. The method is good in repeatability and high sensitivity.
Owner:SHENYANG INST OF APPL ECOLOGY CHINESE ACAD OF SCI

Variable-pitch servo driver with function of energy storage

The invention discloses a variable-pitch servo driver with a function of energy storage, which belongs to the technical field of wind power generation. The variable-pitch servo driver comprises a rectifying circuit, a current limiting circuit, an energy-storage circuit, a braking circuit and an inverting circuit, wherein the input end of the rectifying circuit is connected with a power grid so asto transmit alternating voltages, one output end of the rectifying circuit is connected with the input end of the current limiting circuit so as to transmit direct voltages, and the other output end of the rectifying circuit is connected with one input end of the energy-storage circuit so as to transmit the direct voltages; and the output end of the current limiting circuit is connected with the other input end of the energy-storage circuit so as to transmit the direct voltages subjected to current limiting, the output end of the energy-storage circuit is connected with the input end of the braking circuit so as to transmit the direct voltages, the output end of the braking circuit is connected with the input end of the inverting circuit so as to transmit the direct voltages, and the output end of the inverting circuit is connected with a driven motor so as to transmit the alternating voltages. The variable-pitch servo driver of the invention is not required to be equipped with other standby powers, is compact in structure, is beneficial to shorten the volume of the whole system, and significantly reduces the cost of a variable-pitch system.
Owner:SHANGHAI JIAO TONG UNIV +1

A method for determining long-term shear strength of a rock structural surface

A method for determining long-term shear strength of a rock structural surface is provided. The method includes firstly preparing a rock structural surface sample; subjecting the sample to a shear creep indoor test to obtain a shear creep curve of the sample; determining a long-term shear strength range of the rock structural surface through a shear creep indoor test; building a shear creep modelof the sample according to the shear creep curve of the sample so as to obtain model parameters; building a numerical model of the sample according to the dimension of the sample and characteristics of the structural surface; and equally dividing the obtained long-term shear strength range into a plurality of parts as values of horizontal shear stress applied in a numerical test, and subjecting the sample to a shear creep numerical test to obtain an accurate value of the long-term shear strength of the rock structural surface. The range of the long-term shear strength of the rock structural surface is determined according to an indoor test result firstly, and the long-term shear strength of the rock structural surface is accurately obtained based on a numerical test result.
Owner:NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER

Refrigeration, supply heat and hot water system capable of performing solar evaporative cooling and capillary radiation

The invention relates to a refrigeration, supply heat and hot water system capable of performing solar evaporative cooling and capillary radiation. The refrigeration, supply heat and hot water system is characterized in that a circulation water box in an evaporative cooling system is connected with a water pouring device through a circulation water pump, and the water inlet and water outlet of the circulation water box are respectively connected with the water outlet of a first water collector and the water inlet of a first water knockout drum; the water inlet of the first water collector is respectively connected with the water outlet of an air cooler positioned in an evaporative cooling system and the water outlet of a second water collector, the water outlet of the first water knockout drum is respectively connected with the water inlet of the air cooler and the water inlet of a second water knockout drum, and the water outlet of the second water knockout drum and the water inlet of the second water collector are respectively connected with the water inlet end and water outlet end of a capillary radiation tail end in a room; and a fresh air dehumidifier is communicated with the room, a capillary gravity circulation cabinet is arranged in the room, and the fresh air dehumidifier and the capillary gravity circulation cabinet are respectively connected with the water collector. The refrigeration, supply heat and hot water system provided by the invention has the advantages that the structure is simple, the use is convenient, an energy source is saved, and the fresh air requirements of an air conditioner in winter and summer, the domestic hot water requirements of the whole year and the fresh air requirements of transition seasons are met.
Owner:UNIV OF SHANGHAI FOR SCI & TECH

Eccentric star-like cinder valve

The invention discloses an eccentric star-like cinder valve. The eccentric star-like cinder valve is used for discharging ash and unloading below an ash bucket and a storage bin in the industry such as environmental protection, metallurgy, building materials and the like. The eccentric star-like cinder valve mainly solves the technical problems that materials in a conventional cinder valve cannot be fed uniformly and the like. The technical scheme comprises the main points that: an impeller is arranged in a cavity of an eccentric shell which is similar to a volute shape; bearings are arranged at the two ends of the shell; end covers and the like form approximately closed space with the shell; a material inlet hopper and a material outlet hopper are arranged on the upper surface and the lower surface of the shell; and a material inlet is formed on one side of the radial direction of the impeller and is deviated from the rotation geometric centre of the impeller. The gravity of materials entering the impeller from the material inlet generates tangential force to one side of the impeller, so that the impeller is rotated automatically. A shaft end connected with the impeller is extended out of the shell, and an electromagnetic brake is arranged on the shaft end, so that the impeller is controlled to be rotated according to expected requirements. Or a motor speed reducer is arranged on the shaft end, the motor speed reducer plays a role in boosting when the gravity of the materials is not enough and the impeller is rotated automatically. The cinder valve in the eccentric structure has no air leakage and gas leakage phenomena, can rotate automatically without additional power in general situations, and can fulfill the aim of discharging ash; the power of a matching motor is only 1/3 to 1/5 of a conventional valve; an energy-saving effect is very obvious; the structure is simple; the manufacturing cost is low; and the eccentric star-like cinder valve is convenient to maintain.
Owner:PINGAN ELECTRICAL
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products