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4882results about How to "Reduce types" patented technology

Backup clock calibrated by GPS

The invention provides an adder-based backup clock calibrated by a GPS. The adder-based backup clock comprises a GPS receiver, a singlechip, a crystal oscillator, a programmable logic device and a time-digital converter (TDC) which are connected in sequence. The frequency of the crystal oscillator is divided into second pulse output by an adder-based clock circuit realized in the programmable logic device, wherein the frequency dividing ratio of the clock circuit can be finely adjusted. By utilizing the characteristic that 1PPS second pulse signals output by the GPS receiver has a random jitter error but no accumulation error while a second pulse generated after the frequency division of the high-stability crystal oscillator has good temporary stability but the accumulation error, the time-digital converter (TDC) is adopted to measure a phase difference between the two second pulses and filter measurement results of multiple times so as to calculate an accuracy error value of the frequency of the crystal oscillator, the error value is converted into a clock step fine-adjusting value and the frequency dividing ratio of the circuit is adjusted to compensate an accuracy error of the crystal oscillator generated by aging so as to realize high-precision backup. The backup clock has the advantages of full digitalization, simple structure, convenient integration and the like.
Owner:HUAZHONG UNIV OF SCI & TECH

Sound absorbing material preparation method, sound absorbing material and loudspeaker

ActiveCN105516880ARaw material type and grade requirements are reducedSimple preparation processElectrical transducersLoudspeakerAcoustic effect
The invention discloses a sound absorbing material preparation method, a sound absorbing material and a loudspeaker. The method comprises the following steps of preparing non-foamed material slurry, and mixing uniformly; performing reaction on the non-foamed material to form non-foamed sound absorbing material powder with the FER or MFI structure; performing heteroatom replacement on the non-foamed sound absorbing material powder; adding binder into the modified non-foamed sound absorbing material powder; shaping, drying and calcining the non-foamed sound absorbing material, and thereby obtaining the non-foamed sound absorbing material with a set grain size, wherein the mass ratio of silicon and aluminum in the non-foamed sound absorbing material is less than 200. The sound absorbing material is prepared by the non-foamed material, and the mass ratio of silicon and aluminum in the prepared non-foamed sound absorbing material powder is less than 200. The rear vocal cavity of the loudspeaker is filled with the sound absorbing material provided by the invention. The method is low in requirements on material category and grade and simple in technology; and the material prepared by the method is good in absorbing ability and slow in aging. The loudspeaker has good acoustic effect.
Owner:GOERTEK INC

Compound feed for teaching piglets to eat foods other than breast milk

InactiveCN102178115AHealthy micro-ecological balance environmentAvoid damageFood processingAnimal feeding stuffDiseaseSucrose
The invention provides compound feed for teaching piglets to eat foods other than breast milk, which is used for weaning piglets and teaching the piglets to eat foods other than breast milk, and comprises the following components in part by weight: 212.4 parts of corn starch, 154.0 parts of bulked corn, 100.0 parts of 46 percent of bulked bean pulp, 40 parts of fish meal, 100 parts of wheat flour, 5 parts of calcium powder, 21 parts of calcium hydrophosphate, 2 parts of table salt, 20 parts of soybean oil, 5 parts of lysine, 2 parts of threonine, 1.5 parts of choline chloride, 10 parts of premix, 0.2 part of complex enzyme, 0.3 part of pig Duowei, 0.2 part of sweetener, 0.3 part of flavouring agent, 3 parts of baking soda, 20 parts of cane sugar, 30 parts of glucose, 50 parts of egg powder, 70 parts of soy protein concentrate, 50 parts of fermented bean pulp, 6 parts of acidizer, 100 parts of whey powder, 0.5 part of mould removing agent, 0.3 part of antioxidant and 0.3 part of mildewpreventive. In the invention, the problems of incomplete immune functions, low disease resistance, inadequate digestive ferment, incomplete upper gastrointestinal development, low digestion and absorption ability, susceptibility to diarrhea and the like of piglets.
Owner:AGRI SCI & TECH INST CO LTD OF CHENGDU WEST HOPE GRP

Medlar and red date enzyme and preparation method thereof

The invention discloses a medlar and red date enzyme and a preparation method thereof, which belong to the technical field of enzyme preparation. Multi-strain composite fungi powder is adopted as a leavening agent; the medlar and the red date are adopted as main raw materials; dietary fiber, pectin hydrolyzate, seasoner extracting liquor, Chinese herbal medicine extracting liquor, enzyme stabilizer and other multifunctional auxiliary raw materials are scientifically compounded and modified; low-temperature processing technology such as ultrasonic cleaning, cryogenic grinding, microwave-assisted high-voltage pulse electric field processing and ultrasonic ripening are mainly adopted in the whole process, so that the natural colors, the flavor, the taste and the content of the active materials of the medlar and the red date are maintained furthest, the biological stability, the non-biological stability and the biological activity of the medlar and red date enzyme are obviously enhanced, the introduction of chemical addition agent is reduced, and the juicing rate of the medlar and the red date as well as the food safety of the enzyme are improved. Finally, the medlar and red date enzyme with high biological activity, strong stability, strong taste, flavor and appetite, long expiration date and edible safety is prepared.
Owner:NINGXIA JINSHANGQI BIOTECH

Strong-inhibition and strong-blockage aluminum-based anti-collapse water-based drilling fluid

The invention discloses a novel aluminum-based anti-collapse agent and provides a strong-inhibition and strong-blockage aluminum-based anti-collapse water-based drilling fluid system by combining the performance requirement of drilling fluid based on the novel aluminum-based anti-collapse agent. The strong-inhibition and strong-blockage aluminum-based anti-collapse water-based drilling fluid contains the following substances in parts by weight: 100 parts of fresh water, 4 parts of sodium bentonite, 0.1-1 part of a coating inhibitor, 0.3-5 parts of a strong amine inhibitor, 0.5-5 parts of a filtrate reducer, 0.3-1 part of a thickening agent, 1-5 parts of a lubricating agent and 0.5-5 parts of an efficient aluminum-based blocking agent. The key technique of the invention is to provide use of the aluminum-based anti-collapse agent as a mud rock blocking anti-collapse agent in drilling fluid. After an aluminum-based blockage anti-collapse agent acts with a rock core with same thickness, the time required for transferring differential pressure of 1MPa is substantially shortened in comparison with the time (about 1.5 hours) required for transferring differential pressure in a blank rock core, so that the aluminum-based blockage anti-collapse agent has excellent blockage performance. Compared with the prior art, the strong-inhibition and strong-blockage aluminum-based anti-collapse water-based drilling fluid has the following advantages that (1) an amine inhibitor has prominent inhibition performance, and the hydration dispersion inhibition capacity of shale of the drilling fluid system is strong; (2) the anti-collapse agent has prominent inhibition performance and strong blockage anti-collapse capacity, and the hydration expansion inhibition capacity of shale of the drilling fluid system is strong; (3) the water-based drilling fluid system has relatively good rheological property and strong temperature resistance, salt resistance and calcium and inferior soil pollution resistance; and (4) the system contains less treating agents and is simple to prepare and convenient to maintain.
Owner:CHINA UNIV OF PETROLEUM (EAST CHINA) +1

Chassis type automatic electric automobile battery changing station

InactiveCN106627513AOvercome the problem of only charging but not replacing the batteryLarge amount of workCharging stationsElectric propulsion mountingElectricityTest battery
The invention belongs to the field of electric automobile battery change and relates to a chassis type automatic electric automobile battery changing station. The chassis type automatic electric automobile battery changing station comprises a battery changing robot, a transfer machine, a charging frame and a charging machine. The battery changing robot is located on one side of the charging frame, and the charging machine is located on the other side of the charging frame. A transfer track in the advancing direction of an electric automobile is arranged between the battery changing robot and the charging frame. The transfer machine is located on the transfer track. The chassis type automatic electric passenger vehicle battery changing station can automatically take down batteries lack of electricity from an electric automobile, put in batteries full of electricity and automatically charge the batteries lack of electricity. Especially for large-scale and heavy-type batteries, the problem that the batteries can be charged but cannot be changed is solved, the batteries are protected, and a reference basis is provided for development of new energy automobile battery changing modes.
Owner:XIAN AEROSPACE PRECISION ELECTROMECHANICAL INST
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