Search results

Impact of pH Value and Temperature on Cement-based Materials Adsorbing Heavy Metal Ions Yali Wanga*, Suping Cuib, Xikui Xuc, Mingzhang Land College of Materials Science and Engineering, Beijing University of Technology, 100 Pingleyuan, Chaoyang District, Beijing 100124, China.
Micro-structure analysis shows that cement-based materials’ main adsorption methods are different when pH values are different.
Permeable pavement materials can discharge the rainwater very fast and prevent surface accumulated water.
Summary Cement-based materials have selective adsorption phenomenon for different heavy metal ions (Cu2+, Zn2+, Pb2+, Cd2+).In addition to zinc ions, the cement-based materials’ capacity of adsorbing heavy metal ions increases as the pH value and the temperature increase.
[11] Maria C, Dimitris D, Evaluation of ettringite and hydrocalumite formation for heavy metal immobilization: Literature review and experimental study[J], Journal of Hazardous Materials. 136(2006)20-33

Due to the low strength and difficulty of recycling some scholars made a new material by compose expanded graphite with other materials.
Jin, The removal of oil materials from water by a new type graphite material, China environmental science. 17(1997)188-190
Liu, et al, Adsorption and decoloration of acid dyes waste water with expanded graphite, Journal of Sichuan University (Natural Science Edition). 44(2007)399-402
Chen, et al, Preparation of expanded graphite-based carbon/carbon composite electrode and its degradation of phenol, Journal of Functional Materials. 43 (2012) 240 - 243
Lian, et al, Study on Adsorption of Nitrobenzene onto Expanded Graphite, Journal of Fujian Normal University (Natural Science Edition). 26(2010)50-52

The cases of beam sectional material behavior under hardening and softening are investigated.
Acknowledgements The study was supported by grants from the National Natural Science Foundation of China (No. 90815014, 51008101) and China Postdoctoral Science Foundation (No. 20100471019).
Flórez-López: International Journal of Solids and Structures, Vol. 40(2003), p. 5109 [3] A.
Filippou: Journal of Structural Engineering, Vol. 123(1997), p. 958 [4] X.C.
Fenves: Journal of Structural Engineering, Vol. 132(2006), p. 244 [7] R.H.J.

Influence of anvil geometry on stretching process of cylinder forging with materials properties in materials engineering Yonghua Li a, Jing Zhang b, Weiyi Liu c School of Materials Science and Engineering, Shenyang Ligong University, Shenyang 110159, China ayhlicn@163.com, bwszj1987@163.com, c liuweiyi67231@163.com Keywords: Anvil geometry; Finite element simulation; stretching.
Berski: Journal of Materials Processing Technology Vol. 157-158 (2004), p. 131
Stefanik: Journal of Materials Processing Technology Vol. 177 (2006), p. 238
[5] Quang-Cherng Hsu, Rong-Shean Lee: Journal of Materials Processing Technology Vol. 69 (1997), p. 264.T [6] Y.S.
Moon: Journal of Materials Processing Technology Vol. 211 (2011), p.1136

Using magnetic materials such as ferrite for the substrate can greatly reduce the size of the antenna.
The use of layered magnetoelectric materials substrate microstrip antenna for a number of simulation, and obtained the positive conclusion, but is only theoretical materials simulation [7].
Analysis and design of an Φ-shaped compact multi-frequency microstrip antenna [J] Journal of Chongqing University of Posts and Telecommunications (Natural Science Edition), 2011, 23 (3): 87-91
Journal of Chongqing University of Posts and Telecommunications (Natural Science Edition), 2009, 21(3):368-371
Science & Technology Review, 2010, 28 (22)9

Sha, K.L.Edwards: Materials & Design.
Shi: Material Science and Technology Vol. 15 (2005), p. 456 [4] J.J.
Gao: Materials Science and Technology Vol. 20 (2004), p. 797 [6] J.Q.
Korker: Materials & Design.
Zou: Journal of Materials Processing Technology Vol. 129(2002), p.399

Introduction In recent years, with the continuous development of science and technology, the research and development of new materials become more and more comprehensive, and gradually develop and promote some polymer materials [1].
However, most of these polymer materials are brittle materials, which often have defects in the preparation process.
Journal of Electron Microscopy, 2015, 3406: 521-529
Composites Science and Technology.2017,7(146):26-33
International Journal of Plasticity.2020,7(130):102712

Introduction The wall material, the largest use of a building material, is about 70% of total building materials.
Cases Study Now we have 5 wall materials available.
Ma: Building Science, Vol. 23 (2007), pp. 19-23
Wang: Journal of Chang’ an University (Natural Science Edition), Vol. 26 (2006), pp. 57-60
Wang: Journal of Engineering Management, Vol. 24 (2010), pp. 398-410

The experimental design of similar materials of coal In the testing of coaly similar materials, you need to consider the similarity, so you must first determine the various physical and mechanical parameters of coal, and in accordance with this parameter to select similar raw materials.
According to the selected raw materials ratio, all the formula tables were obtained.
Su: Rock Mechanics and Engineering Journal, Vol.21 (2002) No.12, p.1827–1830
Di: Rock Mechanics and Engineering Journal, Vol.21 (2002), No.12, p.1667–1671
Fan: Journal of Jilin University (engineering science edition), Vol.38 (2008) No.2, p.399–403

An Empirical Study on Interlanguage of Computer Science and Engineering Major Students in English Writing Li Jing School of Applied English,Beijing International studies University,China Lijing020202@126.com Keywords: interlanguage, English writing, computer science and engineering major, error analysis Abstract.
Subjects were randomly chosen from computer science and engineering major students in Beijing University of Technology and Renmin University of China.
The important steps in error analysis are as follows: language materials selection; mistakes identification; classification of errors; estimation of the mistake[3].
Verdugo: The nature and patterning of native and non-native intonation in the expression of certainty and uncertainty：Pragmatic effects, Journal of Pragmatic Vol. 21(2005),p121-145
Richards:Non-contrastive approach to error analysis, English Language Teaching Journal Vol. 25(1971),p204-219.