The studying advances of the economic threshold of forest pests in China are reviewed in terms of conception, study method, determining model, current study status, existent problems and countermeasures.
Advances in research on application of risk analysis to water systems are summarized from the aspects study methods and some practical issues, such as flood control, water resources utilization, water conservancy project construction, groundwater and its pollution, and so on.
This article recounts the main nature on animal mitochondria and the structure characteristics and the polymorphism and the evolution on animal mitochondria DNA and the study methods to animal mtDNA,In the end,introduces the application of animal mtDNA to the study on fish population genetic structure.
After settlement and analysis of abundant data and materials, the paper studies the developers, the subject character, the customers and the marketing strategies by the study methods of relating theory to the practice, the analysis methods of system, compare, “7O”of consumer activity, and competition guiding price, the marketing theory of Philip Kotler, the famous American expert on marketing, and Potter competition model etc.
Main development trends in theory and research methods are surveyed and certain results and applications are described.
The necessity of the collaboration of soil scientists, microbiologists, and molecular biologists in integrating different research methods for a proper assessment of soil microbial diversity is discussed.
Using electrochemical and structural research methods, it is shown that, under comparable conditions of the corrosion treatment, the PtCo/C system is less liable to degradation caused by the dissolution or aggregation of the catalyst particles.
Published data obtained by various research methods on structural characteristics of sodium ion hydration in aqueous solutions of its salts and authors, X-ray diffraction data have been generalized.
Thus, it is necessary to reconsider research methods and approaches based on the assumption that insects damage leaves nonselectively, irrespective of their size.
Review of the Monograph Sedimentary Basins: Study Methods, Structure, and Evolution, Yu.
In the paper we study methods for constructing particular solutions with nonexponential asymptotic behavior to a system of ordinary differential equations with infinitely differentiable right-hand sides.
It is conjectured that this may partly be explained by the fact that different study methods were used.
Incompatible study methods and concepts made statistical pooling of results invalid.
Some recent study methods and results in this field are reviewed.