2 results about "Natural stress" patented technology

The application provides a fissure rock mass natural stress and water flow environment indoor simulation device, and relates to the technical field of fluid-structure coupling test.The simulation device uses the fissure rock mass sample to be placed in a stress and water flow environment simulation tank, injects hydraulic oil into the test cabin, transmits the hydraulic oil through the flexible shell and the confining pressure head, applies the specified confining pressure to the fissure rock mass sample, drives the shaft pressure rod to apply the specified axial pressure to the fissure rock mass sample through the shaft pressure head, simulates the specified water flow environment to the fissure rock mass sample through the water inlet and the water outlet, and makes the simulation device apply the three-dimensional natural stress to the fissure rock mass sample and apply the water flow environment to the lateral side of the sample, so that the water can flow into the fissure rock mass sample and flow out of the sample.Based on the simulation device, the important tests such as the triaxial compression test and the borehole water pressure test under the coupling condition of the fissure rock mass stress and the water flow can be carried out, and the simulation device has the characteristics of simple operation, various functions and wide application range.

The present application relates to the field of transcriptomics, and specifically discloses a method for identifying plant salt-tolerant germplasm resources by using multi-tissue transcriptome sequencing, comprising the following steps: S1, salt-tolerance evaluation and grade division: placing the plant germplasm to be tested under a suitable concentration of salt stress conditions for seedling culture, measuring its morphological indicators and physiological and biochemical indicators, calculating the salt-tolerance coefficients of each indicator, and using multivariate statistical analysis methods to comprehensively evaluate and grade the salt-tolerance of the germplasm; the present application first constructs a standardized salt-tolerance identification process from the laboratory to field application, uses gradient salt solution to simulate the natural stress environment, measures multi-dimensional indicators such as growth morphology, photosynthetic physiology and antioxidant system at the key growth stages, and uses statistical methods such as salt-tolerance coefficient, membership function and principal component analysis for comprehensive evaluation and grade division, thereby realizing systematic, rapid and accurate identification of the salt-tolerance of a large number of corn inbred lines.