45,577 Result(s)
within
Zheng-**ong **
English
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Chapter and Conference Paper
A Comparative Study on Methods of Tillage of Paddy Soils in Taihu Lake Region
The principal rotation system in Taihu Lake Region is rice-wheat rotation. The traditional method of tillage is such that in the cultivated layer there is an upper sub-layer with muddy paste and a lower sub-la...
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Chapter and Conference Paper
The Status of Microelements in Relation to Crop Production in Paddy Soils of China: I. Boron
The paddy soils are a kind special cultivated soils, Their chemical characteristics are radically different from those of normal upland soils. Some nutrients are moblized and translocated, while others remain ...
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Chapter and Conference Paper
The Status of Microelements in Relation to Crop Production in Paddy Soils of China: III. Zinc
Zinc deficiency is the most common problem in paddy soils. Since the disorder was reported, it has become recognized as an important and widespread problem(l). In China, zinc deficiency is also found and it di...
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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
Singular perturbation of first boundary value problem for higher order elliptic equations (II)
In this paper we discuss singular perturbations of first boundary value problem for higher order elliptic equations of two parameter and obtain the asymptotic expression for the formal solution containing two-...
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Article
Some theorems for determining the definiteness and changeability of sign of functions and the application to the conditional stability of the motion of the axis of a slee** top
This paper gives some theorems for determining the definiteness and changeability of sign of functions as well as the application to the axis of a slee** top. The necessary and sufficient condition of the co...
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Article
Finite element study of dynamic characteristics of main components of machine tools
Dynamic characteristics have been studied for main components of machine tools by finite element method. The multi-element static and dynamic structural analysis program makes possible the analysis of main com...
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Article
The **gaze ophiolite (Tibet): a peculiar oceanic lithosphere
The **gaze ophiolite which outcrops along the Yarlung Zangbo river, southern Tibet, locally displays a complete ophiolitic sequence from marine sedimentary cover over basaltic volcanics to the north, to fresh ...
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Chapter
Scanning Photoacoustic Microscopy and Detection of Subsurface Structure
A scanning photoacoustic microscopy with a surface imaging resolution of about 2µm has been established. Some images of the subsurface structure of metals and layered materials have been obtained by measuring ...
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Article
The relationship between cation-induced fluorescence and membrane stacking in isolated spinach chloroplasts
In order to study the relationship between Mg++-induced fluorescence and membrane stacking, trypsin was used as a probe. Trypsin treatment diminished to a high degree the light-induced variable fluorescence and m...
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Article
The application of the finite element method to solving Biot's consolidation equation
Biot's theory of consolidation of saturated soil, regards the consolidation process as a coupling problem between stress of elastic body and flow of fluid existing in pores[1]. It can more precisely reflect the m...
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Article
Fissionlike exit channel in the 5.8 MeV/u84Kr on24Mg reaction
Fissionlike (FL) phenomena for systems around mass 100 have been shown previously interpretable in terms of dynamical fission. This appears to be dependent on the entrance channel mass asymmetry. We have studi...
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Article
The Hamilton's principle of nonholonomic variable mass systems
The Hamilton's principle is extended to the most general, nonholonomic variable mass systems. The Hamilton's principle of nonholonomic variable mass systems is obtained and is illustrated with examples.
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Article
Dynamic analysis of nonlinear systems by modal synthesis techniques
Different kinds of modal synthesis method have been used widely in dynamic analysis of linear structure systems, but, in general, they are not suitable for nonlinear systems.
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Article
Somaclonal genetics of rice, Oryza sativa L.
The inheritance and variations of some traits of more than 2,000 somatic cell derived plants of rice (Oryza sativa L.) were investigated in the second and third generations (T2 and T3) of regenerated plants (soma...
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Article
The effects of emission line identification on the redshift distribution of QSO's
We use the QSO's in the catalog compiled by Hewitt and Burbidge (1980) as the sample to analyse for the selection effects in the redshift identification. The results show that the redshift distribution caused ...
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Article
The asymptotic solution of a kind of Stefan problem
In this paper, a kind of Stefan problem subject to general initial condition is studied. The slab considered is divided into three regions. There is a different time scale in each one. By means of PLK method o...
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Chapter
A Study of Long-Period Sea Level Changes in the China Sea Areas
The paper describes the seasonal and interannual changes in sea level in the China Sea. The six long-period tidal constituents (Sa, Ssa, Mm, Mf, MSf and MN) which are closely related to sea level changes have bee...
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Chapter and Conference Paper
A Retarding-Accelerating Energy Analyser for SIMS
It is well known that secondary ion energy spectra can give us much interesting information. As a very high energy resolution is not needed for most cases, the retarding-accelerating energy analyser (derived f...
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Article
Two simple proofs of Cayley-Hamilton theorem and two representation theorems
In this paper two simple proofs of Cayley-Hamilton theorem are given and by use of Cayley-Hamilton and l'Hopital's two representation theorems concerning tensor functions of an arbitrary second-order tensor ar...
