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From function (2), we can see the 1st natural frequency of blade is in inverse ratio to blade’s length L and in direct ratio to material characteristic and geometrical characteristic.
References [1] Li Qihan, Wang Yanrong, Wangjianjun, Investigation of High Cycle Fatigue Failures for the Aero Engine Blades, Aeroengine, No.4, 2003 (in Chinese) [2] Zhang Dayi, Shiyajie, Hongjie, Model analysis of bladed disk coupled system of compressor with low aspect ratio, Journal of Beijing University of Aeronautics and Astronautics, Beijing, 2004 (in Chinese) [3] High Cycle Fatigue(HCF) Science and Technology Program 2002 Annual Report, Version March 22 2004.
Available from: http://www.pr.afrl.af.mil/ [4] Zhao Yapu, Liu Sheng, On the Definition of Coefficient of strain-rate SensitivityChinese, Journal of Aeronautics, May 2001 [5] P.
W ojcicki, Sensitivity analysis applied to a dynamic railroad model, Journal of Sound and Vibration 266 (2003) 1–13 [6] Sprung, Sensitivity of probabilistic fracture mechanics analysis to variations in statistical parameters, Theoretical and Applied Fracture Mechanics 48 (2007) 231–237 [7] Yan Litang, Zhu Zigen, Li Qihan, Analysis on dynamical characteristics of structure, BUAA press, 1987: 33-36 (in Chinese)

Numerical Simulation of Oil- and Water-Sands Multiphase Flow in Gathered pipes Yixin Pan1,a, Hongbing Zhang1,b, Ronghua Xie2,c and Xingbin Liu2,c 1Department of Earth Science and Engineering, Hohai University, Nanjing, China 2Daqing Oil Field Limited Company, CNPC, Daqing, China ayixin_pan@126.com, bhbzhang@hhu.edu.cn, cxieronghua@petrochina.com.cn Keywords: Gathered pipes; Oil- and Water-Sands Multiphase Flow; Three-D k-ε-kp Model; Producing Profile Abstract: In the oil mining process, we need to hold flow characteristic for oil- and water-sands, with low-middle volume fraction of the particles in gathered pipes, in order to design logging tool and build interpretation methods for the producing profile.
In which, Gpk and Gpp is the production of liquid phases turbulent kinetic energy; vp is the kinematic viscosity of particle phases; dp, ρs and ρp are the mean particle size, particle material density and apparent density respectively; αp is the volume fraction for the particle phase; Cμ, Cμp, Cpk, σk, σε, σp, Cε1 and Cε2 are empirical constants and their values are respectively 0.06, 0.0085, 0.9, 1.0, 1.3, 0.8, 1.45, 1.92.
International Journal of Multiphase Flow.
International Journal of Multiphase Flow.
International Journal of Multiphase Flow.

Since the main focus of process planning is on removing material, the need for machine dependent information is mainly based on accomplishable feeds and speeds [3, 4].
The travelling salesman problem is a well known real-world challenge in computer science [8]: Supposing a salesman, who has to visit several cities, the challenge is to find the best path.
Altan: Feed rate optimization based on cutting force calculations in 3-axis milling of dies and molds with sculptured surfaces, in: International Journal of Machine Tools and Manufacture (34) (1994), pp. 365-377
Croft: Feed optimization for five-axis CNC machine tools with drive constraints, in: International Journal of Machine Tools and Manufacture, 48, 7-8 (2008), pp. 733-745
Ting: Efficient tool path planning for 5-axis flank milling of ruled surfaces using ant colony system algorithms, in: International Journal of Production Research, (2010), pp. 1-18

School of Metallurgy and Materials Engineering, University of Tehran, Iran; email: mrsoltanmohammadi@gmail.com 2.
Calik, Diffusion bonding between Ti-6Al-4V alloy and ferritic stainless steel, Materials Letter, 61 (2007), 1747-1750
Li, Phase transformation Diffusion bonding of titanium alloy with stainless steel, Materials Characterization, 56 (2006), 32-38
Nuclear Materials, Vol. 322 (2003), pp. 235-241
Peshkov: Metal Science of Diffusion Weling of Titanium – 1st ed.

For this reason, the wear development is investigated for samples alloyed with different materials with a modified pin-on-disc test.
Experimental Setup and Materials In this study, the characterization of the wear behavior was performed with a modified pin-on-disc test.
In Table 1 the chemical composition of the used materials are presented.
A significant increase in the adhesive wear resistance could not be achieved by using the filler wire materials NiMoCr90 and 308L.
Ghiotti, A., Hot stamping, in Materials Science and Materials Engineering, from Comprehensive Materials Processing, Volume 3, Padova , Elsevier, (2015) 27-54 [3] M.

Chinese Journal of Geotechnical Engineering, 2011, 36(6):890-895
China Journal of High way and Transport, 2011, 24(2):77-82
Journal of Intelligent Material Systems and tructure, 2009, 20(18): 2285-2289
Chinese Journal of Geotechnical Engineering, 2009, 31(4):571-576
Journal of Applied Optics, 31(1), 2010

Fin rays are connected either by flexible material or rigid sliders.
White: Multi-objective Evolutionary Design of Fuzzy Autopilot Controller, Lecture Notes in Computer Science, Springer-Verlag, Berlin 2001, pp. 668-680
Lighthill: Note on the swimming of slender fish, Journal of Fluid Mechanics, vol. 9 no. 2, 1960, p. 305-317
Hu: Biological inspiration: from carangiform fish to multi-joint robotic fish, Journal of Bionic Engineering 7, 2010, p. 35-48
Zając: Fish – Like swimming prototype of mobile underwater robot, Journal of Automation, Mobile Robotics & Intelligent Systems, vol. 4, no. 3, 2010, p. 25-30

Sharma1a,* and Charu Sharma2b 1 School of Sciences, IFTM University, Delhi Road, Moradabad–244102 (India). 2 Manav Rachna College of Education, Faridabad (India).
The solution of the problem of Lead Poisoning associated with the production and public use of such materials was evolved from the mistaken belief that Lead Poisoning was an occupational hazard and that certain lead levels in human populations were normal and therefore safe.
Mishra, The open Nutraceuticals Journal 3 (2010) 94-99
Gaebel, Saturnine gout among Roman aristocrats, The new England Journal of Medicine 309 (7) (1983) 431-433
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Shanmuga Priya, "Patient health monitoring system using IoT," Materials Today: Proceedings, vol. 80, pp. 2228-2231, 2023
Zorzi, "Internet of things for smart cities," IEEE Internet of Things journal, vol. 1, no. 1, pp. 22-32, 2014
Hwang, "BSN-Care: A secure IoT-based modern healthcare system using body sensor network," IEEE sensors journal, vol. 16, no. 5, pp. 1368-1376, 2015
Rodgers, "A review of wearable sensors and systems with application in rehabilitation," Journal of neuroengineering and rehabilitation, vol. 9, pp. 1-17, 2012
Islam, "Development of smart healthcare monitoring system in IoT environment," SN computer science, vol. 1, pp. 1-11, 2020

Journal of Xianyang Teachers’ School. 2000,15(3):40-43.
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