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However, when complex surface is machined, constant feed-rate will bring about fluctuation of material removal rate and overload of machine tools or break of cutter, so machining efficiency and quality are degraded.
Zhou et.al [2] adjusted feed-rate by using cutting simulation system and machine tool characters so that constant material removal rate was obtained and feed-rate was optimized.
(d), tool paths are generated by CL method, machining material is Al metal, and the machining time before and after optimization are 4 minutes and 48 seconds, 4 minutes and 19 seconds, respectively, so the machining efficiency is improved by about 10.1%.In Fig.4(e), tool paths are generated by CS method, machining material is zirconia, and the machining time before and after optimization are 3 minutes and 30 seconds , 3 minutes and 17 seconds, respectively, so the machining efficiency is improved by about 6.2%.Compared with CL method, which feed-rates are not optimized, the machining efficiency of CS method with feed-rates optimization is improved about 31.6%.In the whole machining process, cutting status is stable and vibration of machine tool is low.
Acknowledgements This work was financially supported by the Jiangsu College Natural Science Foundation of Jiangsu Province Education Committee (08KJD460005).
Park: Computer-Aided Design Vol. 36(2004), p.279-288 [6] Xiaobing Chen, Wenhe Liao, Haibing Wu: Journal of Computer-Aided Design & Computer Graphics Vol. 21(2009), p.1800-1804.In Chinese.

Introduction The refinement of solidification structure has been an important guideline to improve mechanical properties of materials [1, 2].
Acknowledgements This research was supported by the National Natural Science Foundation of China under the Grant No.50874093 and No. 51054007.
Materials Characterization, 59 (2008) 283-289
Journal of Iron and Steel Research, 16 (2009) 7-12

This system can make teachers and students access distributed database to learn experience in teaching and query material, etc. from any region through the network.
As the application discipline, it not only introduces latest research achievements of foundation subject, but also fully reflects new technology and new technical renovation as well as great influence of industrial structure transformation from engineering science.
Due to teaching program, and teaching equipment, and teaching material and other problems, the course teaching of engineering management specialty still utilizes traditional teaching method at present.
Using rich graphics, video, audio, animation and so on material realizes the interaction of knowledge and engineering practice, and stimulates potentiality of "teaching" and "learning".
References [1] Huinan Chen, Roles of Stereoscopic Teaching Material and Web-based Class in Teaching Pattern Reform, Journal of Nanjing University of Posts and Telecommunications, Vol.7, No.4, pp. 12-14, December 2005

Study on Smooth Blasting of Tunnel in Fault Formation Fu Qiang Gao Department of Civil Engineering, Luoyang Institute of Science and Technology, Henan 471023 China Email: fuqianggao@yahoo.cn Keywords: Rock tunnel, Fault formation, Tunnel blasting, Slotted pipe charge, Over-excavation Abstract.
The method of slotted pipe blasting technology has many advantages of charging structure simply, wide range of material source, easy processing, producing simply, and blasting effect prominent, etc.
The slotted pipe adopts ABS plastic commonly, considering the ease of access to materials, reducing test costs, and the promotion of test results, the flame resistance and antistatic “double anti” hard PVC plastic material is adopted to produce slotted pipe.
Yu: Journal of China University and Technology, vol. 5 (1995) No.2 p.69 (In Chinese) [3] Y.B.

Introduction Nanocrystals exhibit a series of different performance from ordinary polycrystal and morphous material, such as high strength, high specific heat capacity, high coefficient of expansion and good plastic deformation ability because of their superfine particles, and they also show abnormal Hall- Petch relation[1].
There are many preparation methods of nanocrystals, such as low temperature annealing[2], sputtering[3], crystallization of amorphous material[4], pulse current treating[5] etc.
Journal of Materials Research, Vol. 19 (2004), p. 685 [5].
Chinese Science Bulletin, Vol. 39 (1994), p. 974~976 [6].

LTP, as a physical modification means, stimulates gas into high energy iron which reacts with materials.
Experiments Materials.
Low temperature plasmas processor(YZ-1)supplied from GuoWei advanced science and technology Co.
Journal of Textile Research.vol.2(2004),p.89 [5] Tomiji Wakida, Text.Res.J. vol.8(1993),p.438

People in the observation, the effect is very poor, it is difficult to judge, so this kind of image using linear gray level to realize the exchange. [3] Z’= ZK- Z1/ b- a (Z- a) + Z1 formula 1 Z1 Zk a b Picture 2 Low contrast image histogram Conclusion The segmentation quality is good or bad, directly affect the quality of products and materials.
If the rate of accuracy is not high, long, is caused by too many materials remaining after rolling, if too short is caused by defective quantity increases; for the billet section quality is not high, in the rolling must be cut not neat, thus causing serious waste and too short seconds.
[3] Lu Jianhua, Image Pprocessing and Analysis [M], Beijing: Science Press, 1992, 41-47
Pahlavan, Modeling the Effect of Human Body on TOA Based Indoor Human Tracking[J], International Journal of Wireless Information Networks 20(4), 306-317 [5] Y.

(2) In order to verify the effectiveness and the reliability of the system, lead-free perovskite structure BZT base ceramics materials are prepared in this paper, and the use of VB programming technology and image reconstruction technology carries out the repair process for the artistic image that is obtained by the electron microscope and digital camera
Materials science and engineering, 2011, 25(3): 486-488
Journal of measurement, 2011, 32(8): 766-771.

Experimental determination of the coefficient of friction in rotational sliding joint Rastislav Ďuriš1,a, Eva Labašová1 1Slovak University of Technology in Bratislava, Faculty of Materials Science and Technology, Department of Applied Mechanics, Paulinska 16, 917 24 Trnava, Slovak Republic arastislav.duris@stuba.sk Keywords: Rotational sliding joint, Coeficient of friction, Boaring bushings, Roughnes Abstract.
Steel STN 12 060 (EN ISO C55E, W.Nr. 1.1203) is material if internal bushing.
Results of tests show wearing of the material.
American International Journal of Contemporary Research, Vol. 2 No. 8; (August 2012), ISSN 2162-139X (Print), ISSN 2162-142X (Online), p.304-309 [4] I.

Introduction With the development of science and technology, manufactured products becomes complex, from a single function to multifunction.
On the machine head of each process and production line to get a conclusion after investigation that, operation personnel, material, machine and management methods have important influence on production line balance rate, among them, the operator of the main factors affecting operation proficiency, include the operation technique and quality consciousness, etc.
Material main influencing factors include incoming quality, convenient condition of material, etc., the choice of the fixture, failure rate of machine and field management of production line control affects the rate of assembly line balancing.[4] Construct the production line simulation model Collecting and analysis to the existing system data Production system in this design is belongs to the discrete system which the processing time, subassembly, arrival time is not a fixed constant, but random and generally to from a certain random distribution.
First station (material dust) increased 1 people, to from 2 person operation; Third stations and fourth stations are merged (printing + inspect); Tenth stations and eleventh stations are merged (paste big protective film + cut big protective film ); Second station (paste the feet pad), eighth station (set skirt) improve operation tool; Fifteenth station (packing) to enhance the efficiency by increasing skilled workers.
Shanghai Jiao Tong University.(2011) p.2-9 (In Chinese) [2] Zhao Yanchun.The Application and Research of Assembly line Balance Method based on Simulation[D].Shanghai Jiao Tong University.(2011) p.10 (In Chinese) [3] Sun Jizhong.Logistics system optimization and simulation of automobile mixedmodel assembly line based on eM-Plant[D].Southwest Jiaotong University. (2008) p.45-48 (In Chinese) [4] Li Chihui，Huang Yuping，Li Jinhui.Productivity Increase by Using Techniques of Industrial Engineering a Case Study[J].Industrial Engineering Journal，Vol.9 (2006),p.126-131