Abstract: A power converter having a boosting mechanism with a multi-shaft vertically stepped turbine includes: a shaft sleeve, a water inlet end base, an outer sleeve, a plurality of first stepped turbine units, a plurality of first shaft rods, a plurality of second stepped turbine units, a plurality of second shaft rods and a third shaft rod. The first stepped turbine unit is located above the second stepped turbine unit. The second stepped turbine units and the first stepped turbine units rotate in opposite directions. During a drainage process, water flows move in opposite directions and collide with each other to increase a water pressure. Due to the increase in the water pressure, rotational speeds of the first stepped turbine units and the second stepped turbine units increase, and rotational speeds of the first shaft rods and the second shaft rods correspondingly increase.

Abstract: A power converter having a boosting mechanism with a multi-shaft vertically stepped turbine includes: a shaft sleeve, a water inlet end base, an outer sleeve, a plurality of first stepped turbine units, a plurality of first shaft rods, a plurality of second stepped turbine units, a plurality of second shaft rods and a third shaft rod. The first stepped turbine unit is located above the second stepped turbine unit. The second stepped turbine units and the first stepped turbine units rotate in opposite directions. During a drainage process, water flows move in opposite directions and collide with each other to increase a water pressure. Due to the increase in the water pressure, rotational speeds of the first stepped turbine units and the second stepped turbine units increase, and rotational speeds of the first shaft rods and the second shaft rods correspondingly increase.

Abstract: Disclosed is a method for producing three-line hybrid wheat parent foundation seeds, including: determining whether sterile-line head progeny rows satisfy 100% sterile degree index of a sterile line or not by bagged selfing of the sterile-line head progeny rows, separately harvesting the bagged outcrossed heads satisfying the index to achieve cyclic breeding of sterile-line spike lines, and mixedly harvesting the sterile-line head progeny rows satisfying the index for sterile-line foundation seed plots; conducting test crossing on the separately harvested bagged outcrossed head seeds and the restorer-line head progeny rows, correspondingly numbering the restorer-line head progeny rows and bagged test-crossed heads, and separately harvesting bagged test-crossed seeds; conducting yield comparison on the separately harvested bagged test-crossed seeds, taking a part of preserved restorer-line head progeny row seeds meeting the requirement for cyclic breeding of restorer-line spike lines, and then planting the res