The means for obtaining space information are being abundant increasingly and the processing abilities are strengthening continuously, and then the description of geography information is changing toward dynamic, multi-dimension and visualization from static maps.
But because of the complexities of problems, the limitations of study methods, it is need more study on the soil erosion process of the Loess Plateau, especially on quantitatively analyzing the changing of different erosion types.
After a comparative analysis on the soil investigation data of North China Plain in the 20th century, the changes of soil fertility in the process of agriculture practices changing from traditional agriculture to modern agriculture have been expounded.
Human development strategies are changing dramatically. It has become the common understanding by international society that the development strategy based on traditional industry is being replaced by sustainable development.
Two waste materials cooperate to improve degenerated land, using castoff to reconstruct degenerate soil and changing castoff to useful material can get economy, society, and environment benefit, and was up to unite.
The analysis of relative ununiformity of the C field along beam axis pointed out that improvement of uniformity of the C field can be achived by using longer 4-rod C field generative structure without changing the length of microwave cavity, and the frequency unaccuracy caused by the C field uniformity will be reduced.
A sign-changing solution for elliptic equation with sublinear term at origin
It is proved that the semilinear elliptic problem with zero boundary value -Δu=λu-|u|q-1u has a changing sign solution, as q∈(0,1) and λ>amp;gt;λ2, where λ2 is the second eigenvalue of the operator -Δ in the space H01(Ω).
CdSe nanocrystals of different sizes could be obtained by simply changing the solvent.
Spherical, spherical-like, and hexagonal silver nanoparticles can be obtained by changing the reductants.
Results showed that the morphology of the ZrWMoO8 particles can be simply adjusted by changing the gelling agents, and the thermal expansion coefficients of cubic ZrWMoO8 prepared in HCl solution are -3.84 × 10-6 K-1 from 100°C to 700°C.