23,231 Result(s)
within
Zhi-**ong **ao
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Article
Karst types in China
In this paper an attempt is made to better understand the regularities of karst development and karst distribution in China on the basis of analyses of karst morphogenetic types in China. The different associa...
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Chapter and Conference Paper
The Study of Nitrogen Distribution Around Rice Rhizosphere
It is interesting to note that the soil around plant root forms a special nutrient environment, in which the mobility and distribution of nutrient ions directly reflect the plant-soil relationship. However, in...
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Chapter and Conference Paper
Voltammetric Determination of Reducing Substances in Paddy Soils
For the quantitative determination of reducing substances, potentiometric titration and chemical methods have been employed(1–3). However, these methods are tedious in operation. And, what is more important, t...
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Chapter and Conference Paper
On Rice Nutrient Disorder and its Diagnosis in China
Rice nutrient disorder has been widely studied in Asiam countries(1). In recent years, with the rapid expansion of cultivated area of rice in our country, this problem involved in both new and old rice regions...
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Chapter and Conference Paper
Determination of Redox Potential (Eh) by Depolarizing Curve Method
Redox potential as an index of the intensity factor of the oxidation-reduction status of a soil has long been widely used in soil research. But in recent years it has been known that the true equilibrium poten...
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Chapter and Conference Paper
On the Characteristics of Leaching and Accumulation of Chemical Elements in Two Eutric Paddy Soils in Taoyuan County, Northern Hunan Province
The leaching and accumulation of chemical elements in the process of soil formation play an important part in revealing soil development and soil fertility. Based on the data obtained from the chemical determi...
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Chapter and Conference Paper
Hydrologic Status of Paddy Fields During Rice-Growing Period
The hydrologic status of a paddy field reflects the liquid pressure of the moving soil water. Experiences in China show that the drainage condition of paddy field is one of the important factors affecting the ...
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Article
The solution for axisymmetrical shells with abrupt curvature change (corrugated shells) by the finite element method
It has been noted in the present paper that the finite element method using linear elements for solving axisymmetrical shells cannot be applied to the analysis of axisymmetrical shells with abrupt curvature ch...
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Article
Application of Chien's theorem to general variational principle in finite elasticity with body couple
An important theorem proved by W. Z. Chien[1] states the equivalence of the functionals in general variational principles of potential energy and complementary energy. The stated theorem is applied now in form...
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Article
Sex pheromone components isolated from china corn borer,Ostrinia furnacalis guenée (lepidoptera: Pyralidae), (E)- and (Z)-12-tetradecenyl acetates
The sex pheromone components from the corn borer spreading widely in China,Ostrinia furnacalis Guenée, have been identified as (E)-and (Z)-12-tetradecenyl acetates (E andZ12–14∶ Ac). The ratio ofE isomer toZ isom...
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Article
The symmetrical deformation of circular membrane under the action of uniformly distributed loads in its central portion
This paper presents the solution of symmetrical deformation of circular membrane under the action of uniformly distributed loads in its central portion. Its limiting case is the solution of circular membrane u...
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Article
The Moiré geometry of plane finite strain and rotation
It is justified in this paper that the foundation of mathematical theory (12) of finite deformation by the method of co-moving coordinate is identical to Moiré method in experimental mechanics. Hence, the impo...
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Article
Seismic responses for multi-storeyed buildings composed of nonorthogonal members under bi-directional horizontal earthouake ground motions
This paper presents a method for analyzing both linear and nonlinear seismic responses of multistoreyed buildings composed of nonorthogonal structural members under the action of bi-directional horizontal eart...
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Article
The determination of calcium in yttrium oxide by alpha-particle activation analysis
The determination of calcium in yttrium oxide through the40Ca(α, p)43Sc reaction was studied, using a post-irradiation radiochemical separation procedure. The half-life of43Sc was determined to be 3.87 hr. The ch...
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Article
Study on correction coefficients of liminar and turbulent entrance region effect in round pipe
In this paper, a universal method for calculation of the inlet length and correction coefficient for the pressure losses and the flow in the case of laminar and turbulent flow in a smooth round pipe is put for...
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Article
Laser plasmas
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Article
Carbon fibre-reinforced silicon nitride composite
The processing of silicon nitride reinforced with carbon fibre was studied. The problems of physical and chemical incompatibility between carbon fibre and the silicon nitride matrix were solved by addition of ...
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Article
The perturbation finite element method for solving problems with nonlinear materials
The perturbation method is one of the effective methods for solving problems in nonlinear continuum mechanics. It has been developed on the basis of the linear analytical solutions for the original problems. I...
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Chapter and Conference Paper
Characterization of impurities and defects by electron paramagnetic resonance and related techniques
The use of electron paramagnetic resonance (EPR and ENDOR) in the study of defects in semiconductors is briefly reviewed, including group IV (C-diamond, Si, Ge, SiC), III-V (AlSb, GaAs, GaSb, GaP, InAs, InP, I...
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Article
The finite rotation parameter of a deformable body and gyromagnetic effect
The derivation of Synge[2] for the finite rotation formula in terms of Euler parameter is put into tensor form. Hence a further clarification of the geometric meaning of the orthogonal transformation obtained in ...
