Abstract: A core-shell gradient ternary precursor and a preparation method and application thereof. The preparation method includes (1) mixing a terephthalic acid solution with alkaline liquor to obtain a terephthalic acid salt solution, adding a nickel source solution for a reaction to obtain a Ni-MOF solution, mixing the Ni-MOF solution with ammonia water, and adjusting a pH value to obtain a base solution; and (2) adding a nickel-cobalt-manganese ternary mixed salt solution, a liquid alkali solution, and an ammonia-water solution simultaneously to the base solution obtained in step (1) for a co-precipitation reaction, and obtaining the core-shell gradient ternary precursor after aging treatment. The Ni-MOF is pre-prepared and used as a core for the co-precipitation reaction, to obtain the core-shell like precursor with a gradient. Carbon in the core of the core-shell gradient ternary precursor reacts with oxygen, thereby reducing a nickel oxidation state on particle surfaces and reducing crack generation.

Abstract: A process for producing binderless formaldehyde-free fiberboard and coproducing fulvic acid from straw. All-element purification, activation, saccharification and separation are carried out on the non-wood fiber raw material through boiling and defibering to obtain primarily activated lignin, purified and activated fibers, monosaccharides of hemicellulose and non-wood fibers, and fulvic acid. Deep activation is carried out on activated lignin. The binderless formaldehyde-free fiberboard is produced by using sufficiently activated lignin and low-molecular-weight monosaccharides as a hardener and binder. By sufficiently activating the lignin, comprehensive utilization of straw fiber as resources is realized, and the special requirements of binderless formaldehyde-free fiberboard for high-quality fibrous raw material and high-activity lignin are met.

Abstract: The present disclosure provides a cultivation method of morels and belongs to the technical field of cultivation of edible fungi. After nutrient contents that can be metabolized and utilized by morel mycelia are scientifically matched, sterilization treatment of exogenous nutrients is eliminated, and the exogenous nutrients are directly compressed for forming. Formed exogenous nutrient blocks and spawn is sowed and covered with soil, so as to realize a potential difference between “rich” and “poor” nutrients in a physical space. When the spawn germinate to form a mycelium network, the mycelia will enter a nutrient-rich exogenous nutrient area, secrete various extracellular enzymes to decompose and utilize these exogenous nutrient blocks, and transport them to a nutrient-poor mycelium network for storage, so as to complete nutrient assimilation and absorption, and reserve energy for later sexual reproduction.

Abstract: The present disclosure provides a cultivation method of morels and belongs to the technical field of cultivation of edible fungi. After nutrient contents that can be metabolized and utilized by morel mycelia are scientifically matched, sterilization treatment of exogenous nutrients is eliminated, and the exogenous nutrients are directly compressed for forming. Formed exogenous nutrient blocks and spawn is sowed and covered with soil, so as to realize a potential difference between “rich” and “poor” nutrients in a physical space. When the spawn germinate to form a mycelium network, the mycelia will enter a nutrient-rich exogenous nutrient area, secrete various extracellular enzymes to decompose and utilize these exogenous nutrient blocks, and transport them to a nutrient-poor mycelium network for storage, so as to complete nutrient assimilation and absorption, and reserve energy for later sexual reproduction.

Abstract: An electronic device capable of gesturing operation including a plurality of signal transceivers, a signal processor, and a central processor. The signal transceivers emit a plurality of first signals through a plurality of loudspeaker holes. The signal processor generates a plurality of parameter data correspondingly when the signal transceivers receive a plurality of second signals responding to the plurality of first signals reflected by an object through the loudspeaker holes. The central processor analyzes the parameter data to judge a coverage state and a release state of each of the loudspeaker holes, and obtains a coverage order and a release order of the loudspeaker holes accordingly. When the coverage order and the release order of the speaker holes satisfy preset conditions, the central processor outputs a control signal to control a function of the electronic device. In addition, an operating method of the above electronic device is also provided.

Abstract: A data saving method and device and a terminal are provided. In the data saving method, power failure of a power supply is detected (S102); a protection mechanism program for power failure data protection is triggered (S104); and power failure data stored before occurrence of the power failure of the power supply is stored into a predetermined memory according to the protection mechanism program (S106).