Abstract: A gene PpHSP21 with black spot disease resistance is isolated from Pyrus pyrifolia. A nucleotide sequence of the gene PpHSP21 is shown in SEQ ID NO. 1. An amino acid sequence of an encoded protein of the PpHSP21 gene is shown in SEQ ID NO. 2. By constructing the plant overexpression vector and silencing vector of the gene PpHSP21, the gene PpHSP21 is introduced into the plant by the Agrobacterium-mediated genetic transformation method, so that the gene PpHSP21 is able to be overexpressed in the plants, thereby significantly improving black spot disease resistance in plants. The discovery and identification of the gene PpHSP21 provide new genetic resources for stress resistance molecular design and breeding in plants, and to provide new genetic resources for the implementation of green agriculture. The development and utilization of the genetic resources is conducive to reducing agricultural production costs and achieving environmental friendliness.

Abstract: A MEMS microphone, includes a substrate with a back cavity, and a capacitive system located on the substrate, including a back plate and a diaphragm opposite to the back plate, wherein the back plate includes a body portion, a fixing portion connected with the body portion and the substrate, and a plurality of strip reinforcing ribs, the reinforcing ribs are protruded from the body portion. Compared with the related art, the MEMS microphone disclosed by the present disclosure could improve the strength of the back plate.

Abstract: Systems and methods for generating candidate designs and selecting a fracturing position design scheme for a horizontal well to be fractured based on fracturing potential are disclosed. A fracturing potential value of each designed fracturing point or each fracturing point is calculated using obtained values of various indexes of various depth points. A first corresponding relation between fracture conductivity value and the fracturing potential value and a second corresponding relation between a fracture half length and the fracturing potential value is determined. Corresponding first simulated production data for each candidate design is generated, and the candidate design with a highest predicted net present value is selected as the fracturing position design scheme which provides higher rationality and practicability to better guide development.

Abstract: The present invention discloses a fracturing design method and device of a horizontal well to be fractured based on fracturing potential.