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Department of Civil Engineering, Tsinghua University, Beijing 100084, China;) (Email1,2: dhlz_2008@163.com) Key words: genetic algorithms; optimal placement of sensors; displacement modes; curvature modes; structural health monitoring systems; damage detection; suspension bridges Abstract: Damage detection is the most difficult part of structural health monitoring Systems.
Forewords 1.1 The basic principle and advantages of classical genetic algorithm The development of Genetic algorithm is result of life science and engineering science overlapping, it is inspired with evolutionary processes in biology, which itself is a kind of optimization search method of high performance and parallel, which search the global optimal solution.
Measurement of cumulative damage is much more difficult than measurement of the sudden damage caused by accidents(Natural or man-made disasters), because the occurrence time of the latter is known, temporarily sealing bridge can be done after the accident, and the check is done with concentration of manpower and material resources.
How to put the limited sensors to obtain as much information as possible, it is one of the key technologies of large span bridge structure health monitoring system.

Introduction The improvement of mechanical properties is a key issue in the development of metallic materials.
Fully recrystallized samples with initial grain sizes of 20, 22 and 41 µm in the IF steel, 2N-Al and 4N-Al, respectively, were used as starting materials for the ARB process.
Fig. 9 shows the engineering stress-strain curves for the IF steel (Fig. 9a), 2N-Al (Fig. 9b) and 4N-Al (Fig. 9c) samples.
The stress-strain curves of the coarse grained samples used as starting materials for the ARB process are also included in Fig. 9.
For all these materials impurities are present in different concentrations, and precipitation hardening during annealing can therefore not be excluded.

This last point should be based on choice of adapted materials, optimisation of combustion or on improvement of boiler design.
Sorell, Materials at High temperature, 14(3) (1997), pp.207-220
Spiegle, www.chemin.de [19] H; Matsuda, S; Ozawa, K; Naruse, K; Ito, Y; Kojima, Y; Yanase, Chemical Engineering Science, 60 (2005), pp. 545-552
Cox, Materials at High Temperature 20 (2) pp. 175-183 [29] F.
Brossard, 7th International Symposium on High temperature Corrosion and protection of materials, Les Embiez 2008, FR, to be published in Materials Science Forum [30] J.

SEM images provided the key for the correct interpretation of the relationship between surface structure on one hand and the susceptibility of plants to get contaminated on the other [4,5].
Our cooperation partner Ferro Corp., a specialist in performance materials, developed a coating for glass.
Quéré: Nature Materials Vol. 1 (2002), p. 14 [24] W.R.
Kim, in Proceedings of the Fifteenth IEEE International Conference on Micro Electro Mechanical Systems, 20-24 Jan. 2002, Las Vegas, edited by IEEE (Institute of Electrical and Electronics Engineers, Washington, D.C., 2002), pp. 479

Soil Nutrients and Grain Yield Performance in Spring Wheat (Triticum Aestivum) as Influenced by Regulated Deficit Irrigation Zhang Hengjia1, a,b and Li Junhui**2,b 1Gansu Provincial Key Lab of Aridland Crop Science, Gansu Agricultural University, Lanzhou 730070, China 2 Department of Water Resources Engineering, Gansu Agricultural University,Lanzhou 730070, China azhanghj@gsau.edu.cn, bzhangbuchong@hotmail.com **Corresponding Author.
Materials and Methods Site description.
Acknowledgements This research was financially supported by Program of Gansu Provincial Key Lab of Aridland Crop Science, Gansu Agricultural University.

The key problem for the implementation of such a transmitter is the low efficiency of DRL at room temperature (RT).
This model does not agree with Kveder’s observation and one has to conclude that one of the key problems that remain open so far is how to find among the electrical levels detected with space charge region (SCR) spectroscopy technique those that are responsible for DRL.
Kanai, Cathodoluminescence study on the tilt and twist boundaries in bonded silicon wafers Materials Science and Engineering B 91-92, 244 (2002)

Application of Pulse Electrocoagulation to Dye Wastewater Treatment Yimin Chen1,a, Baoxue Zhou1,b, Longhai Li1,c, Yonghui Song2,d, Jinhua Li1,e, Yanbiao Liu1,f, Weimin Cai1,g 1 School of Environment Science and Engineering, Shanghai Jiao Tong University, 800 Dong chuan Road, Shanghai 200240, China; 2 Chinese Research Academy of Environmental Sciences, Beijing 100012, China ayihoo83@yahoo.com.cn, bzhoubaoxue@sjtu.edu.cn, clhli@ujs.edu.cn, dsongyh@craes.org.cn, elijinhua@sjtu.edu.cn, fashen8212@sjtu.edu.cn, gwmcai@sjtu.edu.cn Keywords: duty factor, energy conservation, pulse electrocoagulation, recalcitrant dye wastewater Abstract.
Method and materials The experimental setup of PE consisted of four main compartments, wastewater treatment reactor, pulse power, oscilloscope and computer (Figure 1).
Acknowledgements This work was supported by “Chinese National Key Projects of Water Pollution control and Reclamation” 2008ZX07208-003.

For example, it should reduce the traditional energy consumption, adopt the new energy conservation equipment and construction materials, in the hotel designing and building.
For example, conduct the biogas engineering in the area of village tourism and the application of the transportation vehicles with the new energy source.
[2] Susanne Becken,Murray Patterson: Measuring National Carbon Dioxide Emissions from Tourism as a Key Step towards Achieving Sustainable Tourism.

Vibration Modeling and Sensitivity Analysis of Printed Circuit Board FeiXu1,a, Chuanri Li2,b, Tongmin Jiang3,c and Longtao Liu4,d 1,2,3,4School of Reliability and System Engineering, Beihang University 1,2,3,4 37 Xueyuan Road, Haidian district, Beijing 100191, China aluoyefeihen@163.com,b lichuanri@buaa.edu.cn, cjtm@buaa.edu.cn,d liulongtao8341@163.com Key words:PCB, Vibration modeling, Finite element analysis, Sensitivity analysis Abstract.
The material parameters of the PCB and components are shown in Table 1.
Material properties are shown in tab 1 and FE model is shown in fig. 10.

Lipid Peroxidation and Gene Expression of Antioxidant Enzymes in Response to Polycyclic Musks in Earthworm Eisenia Fetida Chun Chen1 Qi-xing Zhou*2 1Key Laboratory of Environmental Pollution Process and Criteria (Ministry of Education) / Tianjin 2Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering Nankai University, Tianjin 300071 1chennchun@yahoo.com,2zhouqx@nankai.edu.cn *Corresponding Author Qi-xing Zhou; Email: zhouqx@nankai.edu.cn, PHONE: +86-22-23507800 Keywords: Eisenia fetida; polycyclic musks; lipid peroxidation; antioxidant enzymes; gene expression Abstract.
Considering earthworm Eisenia fetida is abundant and widespread in soil ecosystem and has the capacity to accumulate large quantities of inorganic and organic contaminants [13], and it plays a key role in the biomagnifications in food chain, so E. fetida was considered as a well-recognized model organism for the assessment of the toxicity of chemicals in terrestrial ecosystems.
Materials and Methods A.