35 results about "Appropriate technology" patented technology

The invention provides a method for maintaining the number of living bacteria in sour milk or an active lactobacillus beverage, relates to new applications of Rhodiola rosea, and concretely relates to applications of Rhodiola rosea in the maintenance of the stability of the number of living bacteria in sour milk or the active lactobacillus beverage within a shelf life, and / or in the inhibition of the increase of the acidity of sour milk. The invention also provides a making method of Rhodiola rosea-containing sour milk, and a making method of the active lactobacillus beverage. The sour milk and the active lactobacillus beverage are respectively adopted as a carrier, Rhodiola rosea is added, and the total number of lactobacillus in the obtained sour milk or the active lactobacillus beverage is constant; and after the fermentation acidity of the sour milk reaches about 130DEG T, the increase of the acidity of the sour milk is inhibited. A reasonable formula and an appropriate technology enable the obtained sour milk and the active lactobacillus beverage to have a good flavor, a good mouthfeel and a good living bacterium stability within the shelf life.

The invention discloses a stackable MEMS (Micro Electro Mechanical System) sensor package, a stackable MEMS sensor chip and a preparation method of the stackable MEMS sensor chip. The package comprises a cover plate, one or more acquisition wafers and one or more processing wafers, wherein the cover plate is used for packaging; acquisition circuits and MEMS structures are formed on the acquisition wafers; processing circuits are formed on the processing wafers; the processing wafers, the acquisition wafers and the cover plate are bonded by a wafer level bonding technology from the bottom up; and all the wafers are electrically connected by conductive bridge piers. According to the package, the chip and the preparation method, the acquisition circuits and the processing circuits are designed in layers, bonding and packaging are performed by the wafer level bonding technology and a vertical multi-layer stackable structure is formed, so that the area of the chip can be significantly reduced; complete isolation of the acquisition circuits and the processing circuits is realized; interference between analog circuits and digital circuits and circuit noise are reduced; a performance index of a sensor is increased; the acquisition circuits and the processing circuits can be separately processed by appropriate technologies, so that the technology cost of the sensor is lowered; and high-performance, small-size and low-cost terminal equipment is applicable.

The invention relates to a preparation method of sodium niobate ceramic with a diamond-shaped crystal grain morphology, and belongs to the field of leadless antiferroelectric piezoelectric ceramic crystal grain regulation and control. The chemical formula of the sodium niobate ceramic is NaNbO3 (called NN for short), the crystal grain morphology of the ceramic has a diamond shape, and the crystal grain has gradient anisotropy. The preparation method comprises the following steps: carrying out ball milling to prepare mixed raw material powder, processing the mixed raw material powder through an appropriate technology to prepare a mixing precursor, and carrying out a solid phase reaction through appropriate technology regulation and control in order to prepare the antiferroelectric piezoelectric ceramic with uniform micrometer crystal grain size. The dimension effect of the crystal grain makes the ceramic have an excellent ferroelectric performance not antiferroelectric performance. The ceramic has a strong demonstration effect in the crystal grin regulation and control field, so the ceramic has bright prospect; and the high-performance leadless antiferroelectric sodium niobate ceramic prepared through the method has wide application values in high voltage ceramic energy storage capacitors and electro-mechanical energy transducers.