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The research and materials are rare about natural gas downhole choke flow numerical calculation.
Science press, Beijing, China, 2001, p.15-27
Journal of Petroleum Science and Engineering, Vol.39 (2003), p. 99-116
Energy absorption of structures and materials, Chemical Industry Press.
Simmonds: Journal of Applied Mechanics, Vol.70(2003), p.799-808

A constant ratio of cementitous materials (Portland cement plus Sebha kaolin) to sand was set at 1 to 3 by weight, and water to cementitous materials ratio was maintained at 0.485.
Portland cement was replaced by kaolin material at the rate of 10% by weight of cementitous materials.
Price: Applications of Ultrasound to Materials Chemistry, Annual Review of Materials Science Vol. 29(1999), p. 295-326 [2] B.G.
Journal.
Materials.

Finally, we can get: (2) 3.2 Derivation of the Slicing Rate Equation While using the Chemical Mechanical Polish Method to derive the material removal model, Preston equation is usually to be used to express CMP removal rate.
Which means material removal rate is proportional to the vertical cutting force and the wire feed speed: .
Acknowledgement This research was sponsored by A-TECH System Co., Ltd. and National Science Council, Taiwan, R.O.C. under the grant NSC 99-2622-E-035-011-CC3.
McSpadden, “ Fixed AbrasiveDiamond Wire Machining—part I: Process Monitoring and Wire Tension Force,” International Journal of Machine Tools & Manufacture, 2003 [3]William I.
McSpadden, “ Fixed Abrasive Diamond Wire Machining—part II: Experiment Design and Results,” International Journal of Machine Tools & Manufacture, 2003 [4]Zhang Yibing, Dai Yuxing, Yuan Julong and Xiong Wanli, “Design and Implement of Wire Tension Control System for Multi-Wire Saw,” Journal of Mechanical Engineering, 2009 [5]Madhav S.

Therefore, in this paper, the aroylthiourea constructional unit which contains bioactivities was introduced into polymer chain, in order to develop novel thiourea macromolecule pesticide which possessed chemical controlled-release function, and capsule wall material for pesticide microcapsule which possessed physical controlled-release function, and provide theoretical and experimental basis for developing new pesticide.
Scheme 1 Synthetic route of compound 2 Experimental Materials and Apparatus.
Acknowledgements This work was financially supported by the National Natural Science Foundation of China (50604016, 51074183).
Hydrometallurgy Vol. 80(2005), P. 98 [4] S Wang, H Zhong and A P Wang: Chinese Journal of Applied Chemistry Vol. 24-8(2007), P. 291 [5] S Wang, H Zhong and G Y Liu: Journal of Central South University Vol. 15(2008), P. 463 [6] Y J Li, Z G Zhang and K Jin: Acta Chimica Sinica Vol. 65-9(2007),P. 834 (in Chinese) [7] W H Wang, H Zhong and W L Zhang: Journal of Central South University Vol. 40-1(2009), P. 67 [8] X G Dong, L Yan and X J Song: Acta Pharmaceutica Sinica Vol. 42-1(2007), P. 108 (in Chinese) [9] L Doub, L M Richardson and D R Herbst: J Am Chem Soc Vol. 80(1958), P. 2205 [10] D W Fu, J R Song and Y H Ren: Huaxue Tongbao Vol. 12 (2007), P. 942 (in Chinese) [11] P A Yonova and G M Stoilkova: J.

Some of the parameters are: vibration parameters (frequency, amplitude), display parameters (sizing grid, display scale, image translation and rotate angle) and other parameters (rotate speed, material, sampling time).
On-line characterization flow field of polymer melts by using optical real-time processing software We use two kind of materials (PS and HDPE), three kind of rotate speed (20rpm, 24rpm, and 32rpm), five kind of vibration amplitude (0.04mm, 0.08mm, 0.12mm, 0.16mm, and 0.20mm), and five kind of vibration frequency (5Hz, 8HZ, 10Hz, 12Hz, and 15Hz).
Journal of Neuroscience Methods. 2008, 175 : 44–57
Journal of Applied Polymer Science. 1993, 47, (3):395-405
Biophysical Journal. 1994, 67: 2501-2510

Attrition causes bearing and other parts burnout, that turn the electricity main axis lubrication has problem, and the part material may has problem.
Bearing and other parts is best to adopt the high temperature wear-resisting material to enhance the reliability
Journal of Harbin Institute of Technology, 2005, 37(12):1725-1727
Jilin University Journal (technology edition),2004,34(2): 260-263
International Journal of Quality and Reliability Management, 2005, 22(4):421～430

Error Analysis of the Micro Temperature Control System Zhenwei Han1, a, Kefei Song1, b 1Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, China ahanzhenwei1234@163.com, bsongkefei@sina.com Keywords: error analysis; temperature measurement circuit; nonlinear error; system error Abstract.
Because of the influence on temperature coefficient of refractive index and coefficient of thermal expansion for the thin film material, the transmission spectrum of narrow band-pass filters will drift as environmental temperature changes.
For materials with positive temperature coefficient, as the temperature rises, the main effect is the peaks move to longer wavelengths when the temperature changes small, and moisture in the filters will release, to cause the peaks to move to shorter wavelengths, when the temperature changes greatly [1].
References [1] Yun Cui, Mianjun Ma, Yuqing Xiong, Duoshu Wang and Liangfu Huang: Vacuum & Cryogenics Vol.10 No.2 (2004), p. 75-81 In Chinese [2] Yongcheng Wang, Yuanyuan Dang, Shuyan Xu and Kefei Song: Optics and Precision Engineering Vol.18 No.6 (2010), p. 1333-1339 In Chinese [3] Fuyi Huang, Jingyi Wu, Ruzhu Wang and Sheng Li: Journal of Shanghai Jiaotong University No.1 (2009), p. 60-65 In Chinese [4] Hongfei Nie, Xiaoping Li and Yan He: Chinese Journal of Mechanical Engineering No.2 (2009), p. 53-59 In Chinese [5] Jietian Zhang, Hongbo Jia and Lei Ren: Journal of Transducer Technology Vol.21 No.12 (2002), p. 13-14 In Chinese [6] Haitao Qin, Chenyang Xue, Li Qin, Binzhen Zhang and Youchun Ma: Instrument　Technique　and　Sensor No.1 (2007), p. 39-41 In Chinese

Thimmaiah et al. [1] specified that brittle materials, silicon by their inherent properties, are difficult to machine while maintaining the desired surface roughness but J.
It has been found that under certain controlled conditions [3] it is possible to machine brittle materials in ductile regime so that material removal is by plastic deformation, leaving a damage free surface.
Rusnaldy et al. [4-5], Sreejith [6] also studied the effects of various parameters such as cutting speed, depth of cut and rake angle of the tool on machining force to achieve ductile material removal from brittle materials.
Materials Science and Engineering A297 (2001), 230-234 3.
Journal of Materials Processing Technology 169 (2005) , 414–417.

It was thought that the problems could be achieved by changing tool materials, tool geometries and cutting condition to reduce the friction coefficient in order to reduce the heat generation [2-3].
It made the Ti with high content in ceramic materials react with O2 in air.
A Nd:YAG laser was used to produce textures on Al2O3/TiC ceramic tool materials.
Journal of the European Ceramic Society, vol.26 (2006), p.1317–1323
International Journal of Refractory Metals and Hard Materials, vol.30 (2011), p.164-172

The next stage of important research problems for the kitchen waste treatment were desalination and degrease technology, secondary pollution control technology, and the technology of reducing the inputs of auxiliary material.
But the more present researches in domestic and overseas focus on the technology parameters during the biological treatment process, especially for the oxygen demand, temperature and the ratio of raw materials, process control, there is less research for enzymolysis reaction[5].
Wate r Science and Technology. , 1997, 36( 6-7): 493-500
Chinese Journal of Environmental Engineering, 2009, 3(9): 1677-1682
Environmental Science, 2002, 23(3): 36-39