54results about How to "Suitable for development needs" patented technology

The invention discloses a hollow spindle with spiral guide grooves and belongs to the technical field of a hollow spindle of a twisting device. The hollow spindle is divided into an upper part, a middle part and a lower part, wherein the outer surface extending from a fiber inlet at the upper part to the bottom end at the middle part is provided with three to twelve guide grooves, the guide grooves are in a spiral shape, the groove depth of the guide grooves is 0 to 1.2mm, the groove width of the guide grooves is 0.05 to 12mm, the rotating spiral angle of the center line of the guide grooves is 30 to 120 degrees, the fiber inlet is in a structure subjected to chamfering smoothening treatment, the height of the upper part of the hollow spindle is 5 to 8mm, the hemipyramid angle of the upper part is 5 degrees to 15 degrees, the diameter of a yarn guide passage is 0.8 to 1.4mm, the height of the middle part is 8 to 12mm, the height of the lower part is 5 to 9mm, and the inner diameter of an outlet of the hollow spindle is 9 to 14mm. The hollow spindle has the advantages that the yarning forming is compact, the yarn levelness uniformity is good, the yarn strength is improved, and the hollow spindle adapts to beyber yarns and colored spun yarns of air jet vortex spinning.

The invention relates to a strawberry soilless culture medium preparation technique, belonging to the technical field of nutrient fertilizers. The invention is characterized by comprising the following steps: pulverizing cattle manure and edible fungus waste, mixing the cattle manure and edible fungus waste in a volume ratio of 1:3 to form a mixture, and treating the mixture by insolation in the sun plus a water flooding method; in order to implement thermal insulation and no air leakage, completely covering the mixture with a plastic film, and sealing for 1 month to prepare a medium rotten substance; and mixing the rotten substance, turfy soil and perlite in a volume ratio of 3:3:4 to form the medium. The raw materials are easy to purchase and low at cost, thereby effectively solving the problem of treatment of edible fungus waste, and also solving the problem of high price of the necessary turfy soil for the strawberry stereoscopic culture medium; and the medium can be used for continuous cropping extra-nutrition, thereby effectively solving the problem of continuous cropping of strawberry culture.

The invention discloses a control method and device for an energy storage system. The method comprises the steps of calculating an output voltage reference value and a voltage phase angle of the energy storage system according to a VSG (Virtual Synchronous generator); carrying out coordinate conversion on the output voltage reference value, thereby obtaining a voltage component under a two-phase synchronous rotating coordinate system; taking the voltage component as an input voltage for voltage current double loop control, and carrying out the voltage current double loop control to obtain a three-phase voltage reference value; equally dividing the three-phase voltage reference value according to the number of power conversion units of each power conversion link, and superposing each part of the equally divided three-phase voltage reference value and the voltage component obtained through battery balance control, thereby obtaining a voltage reference signal of each power conversion unit. The energy storage system provided by the invention works under a voltage source state both in a grid-connected mode and a grid-disconnected mode, so a control policy does not need to be switched and the voltage and current overshoot problem is avoided. Through utilization of automatic voltage adjustment and frequency adjustment capabilities of the VSG, the energy storage system has a plug and play function and a voltage frequency automatic regulation function.

The invention discloses a crude oil gas-liquid separation process integration method and its equipment, which are designed to realize integrated functions such as buffering of incoming oil from well groups, oil-gas separation and associated gas liquid separation, and mainly include the connection of a closed buffer tank Furnace incoming oil pipeline, external pump pipeline, hot water pipeline, return water pipeline, sewage pipeline, sand discharge gate valve, sewage gate valve, three-way valve and safety valve, air cooler and associated gas separator connected to the three-way valve, Connect the gas discharge pipeline of the associated gas separator, the gas output pipeline and the heating furnace gas pipeline through the stop valve. The present invention has integrated processing functions such as buffering, oil and gas separation and associated gas liquid separation for incoming oil from the well group, and is respectively suitable for the normal closed gathering and transportation of crude oil, and the production needs of large and small associated gas volumes. The invention has the advantages of simple technological process, short construction period, flexible use and operation, and less occupied area, which is very suitable for the development and construction needs of oilfields.

The technical field of the present invention is the field of semiconductor testing, providing a multi-layer organic substrate and a manufacturing method, the method comprising: manufacturing a probe implant with a first precision circuit on the carrier board by an additive method / semi-additive method layer; on the probe implantation layer, a functional combination layer with a second precision circuit is produced by an additive method / semi-additive method, wherein the circuit precision requirement of the second precision circuit is lower than that of the first precision circuit; combined with the parallel production The dielectric layer and the conductor layer are used to make a core composite layer that can be rapidly increased, and the core composite layer is covered on the functional composite layer; on the core composite layer, the fan-out circuit composite layer is made by additive method / semi-additive method and used for Transfer the BGA PAD layer of the load board to form a multi-layer organic substrate. The present invention realizes a low-cost, short-production-cycle multilayer organic substrate manufacturing method, thereby reducing the minimum C4 Pad spacing of the multilayer organic substrate and improving the wiring density of the probe implantation layer, while the C4 Pad surface can be ultra-flat Spend.

The invention discloses a preparation method for opacifying additives of mineral-compound nano titanium dioxide ceramic glazes. Firstly, by using tetrabutyl titanate as a precursor, the sol-gel method is adopted to prepare a nano titanium dioxide / white diatomite photocatalyzed compound material; nano titanium dioxide, carboxymethyl cellulose and the like are added into the nano titanium dioxide-white diatomite compound through ultrasonic dispersion to obtain the additives in an emulsion state, and the obtained additives are added into the ceramic glazees and coated on the surface of the ceramic body through high-temperature calcining; during high-temperature calcining, nano calcium carbonate is wrapped by the nano titanium dioxide-white diatomite compound. The binding reaction between nano calcium carbonate and the nano titanium dioxide particles at the phase interface is achieved through hydroxy groups on the surfaces of nano calcium carbonate and the nano titanium dioxide particles, thereby guaranteeing stable binding of nano calcium carbonate and the nano titanium dioxide particles, and obtaining smooth and fine glazes which are not likely to become yellow and has good whiteness after calcining.

An optical system of satellite-borne differential absorption spectrometer comprises a relay optical system and an Offner imaging spectrometer system. The relay optical system is composed of a relay reflector, relay lenses and a color separation filter. The Offner imaging spectrometer system is composed of an incident slit, a convex grating, and a concave reflector. The relay optical system uses the color separation filter to split a detection waveband to form four channels, which are focused by four groups of relay lenses to the incident slit of the spectrometer. Light at each waveband enters the spectrometer from the incident slit of the spectrometer, is split by the convex grating, and has the light path turned and focused on a detector. The invention utilizes a relay reflector to turn the light path, and utilizes the color separation filter to split the detection waveband into four channels, to therefore improve the detection resolution of the system, ensure measurement accuracy and realize compact volume of the whole optical system. The Offner imaging spectrometer has excellent imaging spectrum performance and reduced distortion. The invention facilitates miniaturization and weight reduction of the whole system, and is suitable for space technology.