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Journal of Environmental Economics and Management, 1993,24, 101-118
Journal of Environmental Economics and Management, 1995, 29, 162-168
Journal of Environmental Economics and Management,1994,27,163-184
Journal of Economic Dynamics and Control, 1988,12,231-254
[17] Arrow K,Bolin B,Costanza R,Folke C.et al.Economic Growth,Carrying Capacity And The Environment[J].Science,1995(15):91-95 [18] Stern,D,I.

Journal of systems engineering (2007)
Journal of Applied Mathematics and Stochastic Analysis (2006)
Journal of Application Probability (1991)
European Journal of Operational Research (2006)
Journal of Yanshan University (2007)

It is made of flexible hard material (like Plywood).
Troyanovich, Sitting biomechanics Part I: Review of the Literature[J], Journal of Manipulative and Physiological Therapeutics, Volume 22, Issue 9(1999), p. 594-609
,Hallbeck,M.S.Riley,M.W.Stentz, T.L.Seating Comfort and its relationship to spinal Profile: a pilot study[J], International Journal of Industrial Ergonomics8(1991),p. 89-101 [3] E.
[7] Lu Jianxiong, Zhang Fuchang, Investigation on ergonomics of sitting position and seat design, Chinese Journal of Ergonomics, 2005, 11(4), p.44-49
[9] Zhang E, Hong Jun, Wu Wenwu, Liang Jian,Design and Analysis of a Test Stand for Biomechanics of Man-Machine Interface in Automobile Driving[J],Journal of Xi'an JiaoTong University, Vol.40 No.5, (2006), In Chinese

Mortar is one of the essential materials in construction engineering, its components include cementitious materials, mineral admixture, fine aggregate, water, and admixture, etc.
The raw materials are prepared in a certain proportion and can be mixed into mortar.
Key Engineering Materials, 2023, 944: 231-246
Journal of Northeastern University (Natural Science Edition), 2020,41 (5): 642-648
Construction and Building Materials, 2018,174 (6): 190-201

Fig. 1 Fracture site of pitman shaft Fig. 2 Macrofractograph appearance The material type, fractographic appearance, microstructure and hardness of the steering gear pitman shaft were analyzed in the paper, and causation and mechanism for fracture were detected and determined.
These working procedures were as follows: cutting material → stamp forging →normalizing → machining → carburizing → quenching and tempering → treated with shot penning →refined grinding.
Increasing cutting allowance on the non-carburizing parts is easy and possible, although waste metal materials.
Acknowledgements The work reported herein was supported by National Natural Science Foundation of China (Grant No. 50665002), and Key Laboratory of Ministry of Education for Conveyance and Equipment (East China Jiaotong University).
Journal of Xiamen University of Technology Vol. 15 (2007), p. 21, In Chinese [3] Information on http://www.china-metallography.com/china-met05/11-else/else006.htm [4] W.D.

The revolutionary design of diamond dresser is based on the pattern forming of a strong polycrystalline diamond material that is sintered at ultrahigh pressure (about 6 Gpa) and high temperature (about 1350 0C).
The groove, however, is shallower than the dressing depth because the pad material springs back due to elastic deformation [7].
Song of Kinik Company and the National Science Council of the Republic of China, Taiwan, for financially supporting this research under Contract No.
Gutmann: Chemical Mechanical Planarization of Microelectronic Materials (John Wiley & Sons, NY 1997)
Sung: International Journal of Machine Tools and Manufacture, Vol. 49 (2009), pp. 722-729

When the addition of Ti is less than 0.028% References [1] CUI Kun.Ferrous and Non-ferrous materials [M].
Materials Science and Engineering, A528(2011)4222-4231
Journal of Xi'an University of Architecture & Technology,1999 (1):1-5

Applications and geological problems that can be solved: (1)Direct search for radioactive mineral-rich geological body, such as uranium, thorium ore deposits. (2)Indirect detection of fracture structure, fracture structure belt often have strong natural α, γ-strength. (3)Radiation detection of building materials, interior decoration materials. 2.4 Gravity measurement Including measuring Δg, gradient measurement, torque measurement. geophysical conditions of application: require obvious difference density during the stratigraphic, geological and rock.
References: [1] Youxin Wu: submitted to Journal of Safety and Enviro nmental Engineering (2009).
In Chinese [2] Zhiyuan Ren: volume 1 of Progress in geological disaster prevention manual for implementation of the Ordinance, chapter, 3, Anhui Cultural Audiovisual Publishers (2009).In Chinese [3] Shaozhong Qu: submitted to Science & Technology Information( 2007).

Performance of Treatment of Domestic Wastewater by Sequencing Batch Biofilm Reactor Dong Yuan1, a 1 Depa China rtment of Civil Engineering, Luoyang Institute of Science and Technology, Luoyang 471023, ayuandong22@126.com Keywords: SBBR; biofilm; domestic wastewater Abstract The objective of this work was to evaluate the performances of A lab-scale innovative sequencing batch biofilm reactor (SBBR) to treat domestic wastewater，in which a acryl cylinder (height 200 mm, diameter 70 mm) was equipped and many fiber threads were attached to the surface of the cylinder as the bacteria carrier.
The SBBR system developed in this study is different from the conventional one, i.e., the specific surface area is larger; oxygen partially penetrates the biofilm, generating an oxygen concentration gradient. 1 Materials and Methods 1.1 Materials Domestic wastewater was used in this study, which was taken from the wastewater well in China University of Geosciences (Beijing).
Application of sequencing batch biofilm reactor technology and its development.Journal of Zhejiang University of Technology, 2006, 34 (2): 213-218 (in Chinese) ［4］Y.Y.

The synthesis of nanocrystalline powder was carried out in FRITSCH P5 High energy ball mill using a commercially pure Ti of 99+% powder as the starting material.
The milling was performed using tungsten carbide balls of 10 and 50 mm in diameter and a vial of the same material.
Journal of Nuclear Materials, (2004) 329-333:382 [2] G.
Science, (1998) 58-263:1745 [5] T.