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A Brief Introduction of macrostructures Theory

海外英语 2012年第15期 150-151页

作者：王丽波佳木斯大学外国语学院英语系

In recent years,numerous textual studies have ***,the majority of them concentrated on the study of cohesion and coherence of *** Dijk(1977,1980),Holland famous linguist,put forward"macrostructures"which provide us with a theo retical basis to study macrostructure of *** paper aims to introduce it in very detail and make it known to all the English learners.

关键词： macrostructures textual studies

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Carbon Nanotubes:from Nanoscale Building Blocks to macrostructures

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复旦学报（自然科学版） 2007年第5期46卷 700-页

作者： Bingqing Wei(Department of Mechanical Engineering, University of Delaware, Newark, DE 19716, USA) Department of Mechanical Engineering University of Delaware Newark DE19716

1 Results Carbon nanotubes (CNTs) have fascinating *** order to use these novel one-dimensional structures for applications such as in nano-electronic,nano-mechanical and electrochemical energy storage device and as structural elements in various composites,the structure of nanotubes needs to be tailored and various architectures and macroscale assembles have to be configured using nanotube building *** macrostructures are macroscopically organized groups of CNTs,which are expecte...

关键词： carbon nanotubes macrostructures building blocks energy storage synthesis

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Application of biochar-based materials in environmental remediation:from multi-level structures to specific devices

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Biochar 2020年第1期2卷 1-31页

作者： Lun Lu Wentao Yu Yaofeng Wang Kun Zhang Xiaomin Zhu Yuecan Zhang Yajing Wu Habib Ullah Xin Xiao Baoliang Chen Department of Environmental Science Zhejiang UniversityHangzhou 310058ZhejiangChina Zhejiang Provincial Key Laboratory of Organic Pollutant Process and Control Zhejiang UniversityHangzhou 310058ZhejiangChina

The development of biochar has triggered a hot-spot in various research fields including agriculture,energy,environment,and ***-based materials provide a novel approach against environmental challenging *** the rapid development of biochar materials,this review serves as a valuable platform to summarize the recent progress on the theoretical investigation and engineering applications of biochar materials in environmental *** a better understanding of the structure-application relationships,the structural properties of biochar from macroscopic and microscopic aspects are *** multilevel structures including elements,phases,surface chemistry,and molecular are highlighted to elucidate the multi-functional properties of ***,catalysis,redox reaction,and biological activity of biochar are briefly illustrated,which influence the transport,transformation,and removal of organic and inorganic pollutants in the *** to the multi-level structures and structure-application relationships of biochar,specific biochar-based materials and devices have been designed for practical environmental *** important progress on the functionalization and device of biochar-based materials,including magnetic biochars,2D and 3D biochar-based macrostructures,immobilized microorganism on biochar,and biochar-amended biofilters are *** environmental friendliness and sustainability of biochar-based materials,considering the whole cycle from synthesis to application,are evaluated.

关键词： Biochar-based materials Environmental remediation Multi-level structure Reactivity macrostructures Biofilters

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Control of equiaxed grains in a complicated Cu-Ni based alloy prepared by centrifugal casting

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China Foundry 2011年第1期8卷 141-144页

作者： Luo Zongqiang Zhang Weiwen Xin Baoliang Li Yuanyuan School of Mechanical and Automotive Engineering South China University of Technology Guangzhou 510640 China

A complicated Cu-Ni based alloy was developed to fabricate wear-resisting bush for high temperature *** concern focuses on the control of equiaxed grains in the developed alloy ingot prepared by centrifugal *** results show that the equiaxed grains are determined by the pouring temperature of the melt,the cooling rate and the rotation speed of the *** the decrease in pouring temperature,the fraction of the equiaxed grains in the transverse section of the ingot increases and the average length of columnar grain *** the pouring temperature is confined below 1,250℃,complete equiaxed grains can be *** on the optimal centrifugal casting processing,the tensile strength of the developed alloy ingot with complete equiaxed grains reaches to 810 MPa and 435 MPa at room temperature and 500℃,respectively,which is 14% and 110% higher than that of common commercial QAl10-4-4 *** wear rate of the developed alloy is 7.0 × 10-8 and 3.8 × 10-7 mm3?N-1?mm-1 at room temperature and 500℃,respectively,which is 5 times and 39 times lower than that of QAl10-4-4 alloy.

关键词： copper-nickel based alloy centrifugal casting macrostructures

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