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By the intake wind performance experiment study of the pipe with high pressure spray, it is pointed out that under experimental conditions the intake wind efficiency of the pipe with high pressure spray is closely related to the spray nozzle and the pipe's structure and the size.The relationship between pipe's intake wind volume and spray nozzle's water consumption is linear, and the relationship between spraying spread angle and the hydraulic pressure becomes nonlinear.The main parameters of reducing dust equipment with high pressure spray is the intake wind volume and controlled zone.Under the conditions of certain structure, the adjustment of hydraulic pressure will make the equipment with high pressure spray run under the optimum condition of the highest intake wind efficiency.

Soil moisture is of great significance for regional resources and environments. The combination of land surface temperature (Ts) and vegetation index (VI) is appropriate for monitoring the regional surface soil moisture status. In this study, we employed HJ-1B CCD/IRS images,DEMand land use types to obtain the information about soil moisture for Minhou county in FuZhou. Firstly,TVDIreflected the soil moisture status was analyzed with in-situ soil moisture measurements based on two kinds of different vegetation indexes (NDVI/EVI). Secondly, the relationship betweenTVDIandDEMwas analyzed. Finally, the soil moisture status of each land use type was explored combined with the main land use types of study area. Research findings indicate that: (1)TVDIcan effectively reflect the spatial pattern of soil moisture andTs/EVIhas a higher accuracy thanTs/NDVI; (2) the spatial distribution of soil moisture is obviously affected by the altitude; (3) there exists correlationship between soil moisture and land use types in study area.

In this paper, each metric component of the Riemann curvature tensor is first transformed into a single metric component, so that the Riemann curvature tensor is transformed into a metric wave form. With this, the Einstein field equations are transformed into metric wave equations. After that, the Schwarzschild space-time line element, the RN space-time line element and the KN space-time line element will be solved using the metric wave form gravitational field equation. In this way, the calculation method of the metric wave form gravitational field equation is specified, and it is proved that the metric wave form gravitational field equation can accurately calculate all kinds of space-time line elements with different geometric characteristics. Then, through the similarity between the four-dimensional electromagnetic potential and Christorff's symbol, the electromagnetic intensity tensor and the Riemann curvature tensor, the metric wave form representation of the four-dimensional electromagnetic potential and the electromagnetic intensity tensor is derived. On this basis, combined with the four-dimensional Maxwell equation, a metric wave form representation of Maxwell equation is given. Then, by the metric wave representation of the electromagnetic intensity tensor, the electromagnetic intensity tensor components of RN spacetime are directly calculated. Combined with the Einstein Maxwell equation in the form of metric fluctuations, the RN space-time line element is deduced and proved. And combined with the transformation relationship between spherically symmetric space-time radial components and ellipsoid radial components, directly convert RN space-time line element into KN space-time line element. This proves that the gravitational field equation of the metric wave form can be applied to the calculation of three types of black hole models. Finally, by comparing the metric wave form of the gravitational field equation and the Maxwell equation, and the analogy of the metric wave form gravitational field equation with the free Kleiin-Gordon equation of curved spacetime, discuss and derive the mathematically unified representation of the three types of field equations respectively, briefly discuss the relationship of the three types of physical fields and the meaning of the unified mathematical representation. Then, the unified representations of the gauge fields of SU(3), SU(2) and U(1) are given respectively.