HEIGHT OF HYDRAULIC FRACTURE ZONE BASED ON PSO_LSSVM MODEL

Height of Hydraulic Fracture Zone Based on PSO_LSSVM Model

Predicting the height of water conducting fracture zones can prevent mine water damage and increase the upper limit of mine mining.To achieve its effective prediction, this study selects four main control parameters for iphone 13 price dallas prediction, including the proportion coefficient of hard rock in the overlying strata, the inclination dist

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Abilities and limitations of a radar RASS wind profiler for the measurement of momentum flux in the planetary boundary layer

A radar wind profiler was used in the RASS mode to obtain remote measurements of the vertical flux of momentum.Time series of half-hour averaged values of the momentum flux are presented as well as profiles of multiple-hour averages recorded on convective summer days.The gross structure of the diurnal variation is in agreement with the expected beh

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Permanent molars: Delayed development and eruption

Delayed development and eruption of all the permanent molars is a rare iphone 13 price dallas phenomenon, which can cause disturbance in the developing occlusion.The eruption of permanent first and second molars is very important for the coordination of facial growth and for providing sufficient occlusal support for undisturbed mastication.In the c

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Characterization of Ecosystem Services and Their Trade-Off and Synergistic Relationships under Different Land-Use Scenarios on the Loess Plateau

The Loess Plateau is one of the most fragile ecological regions in China due to its shortage of water resources and severe soil erosion.The rapid development of urbanization and the implementation of the project of returning farmland to forest (grass) have caused the ecological environment of the region to be strongly impacted by human essie cause

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