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167results about How to "Good development value" patented technology

Rice seedling raising medium based on grain stillage as main component and preparation method of medium

The invention discloses a preparation method of a compound rice seedling raising medium, belonging to the technical field of organic solid waste resource utilization. The preparation method comprises the following steps: drying grain stillage in air, screening to obtain the grain stillage with the particle size of 1-4mm; and adding nutrient soil and vermiculite, and evenly mixing, so as to prepare the compound rice seedling raising medium, wherein the particle sizes of the nutrient soil and vermiculite are 3-5 mm. The compound rice seedling raising medium comprises the following components by volume percent: 50-60% of earworm dung, 20-30% of vermiculite and 20% of nutrient soil. The compound rice seedling raising medium is simple in preparation method, rich in resources, cheap in materials, rich in nutrient and stable in property, waste is turned into wealth, and environmental pollution is reduced. When the medium is used for raising seedlings, the operation is simple and convenient, labor intensity is lightened, rice seedling quality is good, percentage establishment of the seedlings is high, the industrial development of rice seedling transplanting using a rice machine is promoted, and the construction of ecological towns and new rural areas is accelerated.
Owner:YANGZHOU UNIV

Organic catalysts having visible photocatalytic asymmetric hydroxylation photocatalysis performance, and preparation method and application thereof

The invention belongs to the technical field of visible photocatalytic asymmetric organic synthesis, and provides organic catalysts having a visible photocatalytic asymmetric hydroxylation photocatalysis performance, and a preparation method and an application thereof. The catalysts are organic catalysts having a visible photocatalytic asymmetric hydroxylation performance, constructed through combining an asymmetric organic catalyst with a visible photosensitizer through chemical bonds. The catalysts successfully realize the formation of an asymmetric C-O bond through catalytic activation of aC-H bond with molecular oxygen as an oxidizer. The invention especially relates to a most concise method for catalyzing the asymmetric alpha-hydroxylation reaction of a beta-dicarbonyl compound to prepare an alpha-chiral hydroxyl-beta-dicarbonyl compound. The method has the advantages of mild reaction conditions, good substrate applicability and environmental protection. The catalysts have the advantages of extreme easiness in separation from the substrate, stable performances, realization of keeping the catalysis effect after multi-time cycle use, and good application and development values.
Owner:DALIAN UNIV OF TECH

Optical network signal enhancement emission circuit

ActiveCN108055084AOvercoming the problem of weak signalGood development valueElectromagnetic transmittersOptical powerEngineering
The invention discloses an optical network signal enhancement emission circuit. An optical power signal feedback compensation circuit detects an optical power signal of an optical emitter E1, and inputs the optical power signal into an amplitude modulation circuit after comparing the optical power signal with an optical power reference signal and amplifying the optical power signal; the amplitudemodulation circuit receives an electric power signal and the signal input by the optical power signal feedback compensation circuit, couples the electric power signal with the signal, and then carriesout amplitude modulation by utilizing a composite circuit consisting of triodes Q1 and Q2, an adjustable resistor RW and a triode Q3; and finally, an amplification coupling output circuit applies anoperational amplifier AR1 to amplify, and simultaneously, a signal amplified and output by the operational amplifier AR1 and a reference potential output by an operational amplifier AR2 are input intoan adder AR3 together to be coupled and output. Stability of the optical power signal emitted by the emitter E1 is ensured; the problem of signal weakening in the long-distance transmission process of an optical network signal is solved; by regulating break-over voltages of the triodes Q1, Q2 and Q3, a resistance value of the adjustable resistor RW1 can be regulated, so that different types of optical power signals can be regulated; and the optical network signal enhancement emission circuit has very high development value and practical value.
Owner:STATE GRID HENAN INFORMATION & TELECOMM CO +1

Internet of Things signal state indicating circuit of Internet of Things home appliance

InactiveCN107948025ATo achieve the effect of precise indicationExpanded differential signalHome automation networksThe InternetHome appliance
The invention discloses an Internet of Things signal state indicating circuit of an Internet of Things home appliance. The Internet of Things signal state indicating circuit comprises a frequency collection circuit, a frequency modulation loop, a comparison and amplification circuit and an indicating circuit, the frequency collection circuit collects the frequency of an Internet of Things signal when the Internet of Things of the Internet of Things home appliance is used, the frequency modulation loop performs composite circuit frequency selection on a frequency signal by using triodes Q1, Q2,a capacitor C3 and an adjustable resistor R5, the size of level of an output signal of the frequency modulation loop can be adjusted by adjusting the resistance of the adjustable resistor R5, the output signal of the frequency modulation loop is separately input to an in-phase input end and an inverting input end of an operational amplifier AR3 by the comparison and amplification circuit by usingoperational amplifiers AR1 and AR2 for comparison and amplification, the output signal of the comparison and amplification circuit is used as a driving signal of the indicating circuit to control thelevel-by-level conduction of triodes Q3 and Q4, when the Internet of Things function of the Internet of Things home appliance is used, the condition of the Internet of Things signal is judged throughthe number of turned on indicator lamps LED1 to LED3, and the effect of detecting the Internet of Things function of the Internet of Things home appliance in real time is achieved.
Owner:HUANGHE S & T COLLEGE +1

Circuit for preventing virtual current of battery in battery charging process of artificial intelligent electric vehicle

ActiveCN108039762AEliminate virtual electricity phenomenonReduce battery ohmic polarizationBatteries circuit arrangementsElectric powerThird phaseCharge voltage
The invention discloses a circuit for preventing virtual current of a battery in the battery charging process of an artificial intelligent electric vehicle. The circuit comprises a battery electric quantity detection circuit, a power source power supply voltage stabilizing circuit and a phased constant-voltage charging circuit, wherein the battery electric quantity detection circuit is used for reading the potentials of a positive electrode and a negative electrode of the battery tested by an HDGC3912 intelligent battery internal resistance tester via a USB (universal serial bus) interface J1when the battery of the artificial intelligent electric battery is charged; an output signal of the battery electric quantity detection circuit is a three-phase voltage-regulating control signal of the phased type constant-voltage charging circuit, so as to control the phased charging, which is inputted by the power source power supply voltage stabilizing circuit and is received by the phased typeconstant-voltage charging circuit, on the charging voltage of the artificial intelligent electric vehicle; the different voltage states of the battery require different charging voltages; during charging in the first phase, the low-voltage charging is performed, so as to produce the ohmic polarization of the battery in the long-time charging process; during charging in the second phase, the higher-voltage charging is performed, so as to improve the charging efficiency; during charging in the third phase, the low-voltage charging is performed, so as to prevent the virtual current of the battery.
Owner:河南英尼教育科技有限公司
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