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Your search keyword '"Zhou, Xiao‐Ping"' showing total 47 results
Start Over Author "Zhou, Xiao‐Ping" Publisher springer science and business media llc
47 results on '"Zhou, Xiao‐Ping"'

8. Sustainable Intensification of Cultivated Land Use and Its Influencing Factors at the Farming Household Scale: A Case Study of Shandong Province, China

Author

Lyu Xiao, Zhou Xiao-ping, Peng Wenlong, Niu Shandong, and GU Guozheng

Subjects
Sustainable development, education.field_of_study, 010504 meteorology & atmospheric sciences, business.industry, Material flow analysis, Geography, Planning and Development, Population, Distribution (economics), 010501 environmental sciences, 01 natural sciences, Agricultural economics, Geography, Agriculture, Scale (social sciences), Sustainability, General Earth and Planetary Sciences, Tobit model, education, business, 0105 earth and related environmental sciences
Abstract

Promoting the sustainable intensification of cultivated land use (SICL) has become crucial for ensuring a sufficient supply of grain and important agricultural products, as well as for the sustainable use of resources. Taking widely used areas of Shandong Province in China as examples, an analytical scale and level framework for SICL is constructed in this study. It measures the level of SICL through material flow analysis, constructs Tobit models to analyze the influencing factors of SICL at the farming household scale, and analyzes the transition mechanisms of SICL. The results show that the overall level of SICL in Shandong Province is low, and the spatial distribution is uneven. There are relatively more farmers participating in unsustainable intensification than in medium or low levels of SICL, with farmers working at a high level of SICL making up the smallest proportion. The factors that determine the level of SICL at which farmers work vary significantly. More male farmers operate at a low SICL level than female farmers, while females outnumber males at a high SICL level. This is mainly related to the regional distribution of age and population. Meanwhile, with larger cultivated land areas, there is a lower degree of land fragmentation, with a higher level of SICL corresponding to a smaller distance to the nearest town closer within 1–5 km from the town center. We can see the level of SICL and its processes themselves are closely related to time and space scales. Based on the above analysis, it is necessary to clarify the standard processes of SICL to adapt them to local conditions. This includes instructing managers on how to improve resource utilization, increase the sustainable development of cultivated land and establish a comprehensively efficient and functional SICL mechanism. The sustainable intensification of cultivated land use and its specific application in the new era are conducive to enriching the frontier theories and methodology of sustainable development, and are of great significance to the advancement of green agriculture and the decision-making of rural high-quality development.

Published
2021

29. Analysis of the localization of damage and the complete stress-strain relation for mesoscopic heterogeneous rock under uniaxial tensile loading

Author

Wang Jian-hua, Zhang Yong-xing, Zhou Xiao-ping, and Ha Qiu-ling

Subjects
Materials science, Applied Mathematics, Mechanical Engineering, Constitutive equation, Linear elasticity, Stress–strain curve, Micromechanics, Probability density function, Mechanics, Physics::Geophysics, Brittleness, Mechanics of Materials, Hardening (metallurgy), Weibull distribution
Abstract

The mechanical behavior of rock under uniaxial tensile loading is different from that of rock under compressive loads. A micromechanics-based model was proposed for mesoscopic heterogeneous brittle rock undergoing irreversible changes of their microscopic structures due to microcrack growth. The complete stress-strain relation including linear elasticity, nonlinear hardening, rapid stress drop and strain softening was obtained. The influence of all microcracks with different sizes and orientations were introduced into the constitutive relation by using the probability density function describing the distribution of orientations and the probability density function describing the distribution of sizes. The influence of Weibull distribution describing the distribution of orientations and Rayleigh function describing the distribution of sizes on the constitutive relation were researched. Theoretical predictions have shown to be consistent with the experimental results.

Published
2004

30. Analysis of the localization of damage and the complete stress-strain relation for mesoscopic heterogeneous brittle rock subjected to compressive loads

Author

Ha Qiu-ling, Zhang Yong-xing, Wang Jian-hua, and Zhou Xiao-ping

Subjects
Mesoscopic physics, Materials science, Applied Mathematics, Mechanical Engineering, Linear elasticity, Stress–strain curve, Micromechanics, Physics::Geophysics, Strain softening, Condensed Matter::Materials Science, Nonlinear system, Brittleness, Mechanics of Materials, Hardening (metallurgy), Composite material
Abstract

A micromechanics-based model is established. The model takes the interaction among sliding cracks into account, and it is able to quantify the effect of various parameters on the localization condition of damage and deformation for brittle rock subjected to compressive loads. The closed-form explicit expression for the complete stress-strain relation of rock containing microcracks subjected to compressive loads was obtained. It is showed that the complete stress-strain relation includes linear elasticity, nonlinear hardening, rapid stress drop and strain softening. The behavior of rapid stress drop and strain softening is due to localization of deformation and damage. Theoretical predictions have shown to be consistent with the experimental results.

Published
2004

46. Opposite association of two PPARG variants with cancer: overrepresentation of H449H in endometrial carcinoma cases and underrepresentation of P12A in renal cell carcinoma cases

Author

Smith, Wendy, primary, Zhou, Xiao-Ping, additional, Kurose, Keisuke, additional, Gao, Xin, additional, Latif, Farida, additional, Kroll, Todd, additional, Sugano, Kokichi, additional, Cannistra, Stephen, additional, Clinton, Steven, additional, Maher, Eamonn, additional, Prior, Thomas, additional, and Eng, Charis, additional

Published
2001
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