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Isolated net Fig.1 The basic principle diagram of the gas-particle two-phase SFF Journal Title and Volume Number (to be inserted by the publisher) 545 The key factor affecting machining effect is forming equipment of swirling flow, whose structure is designed in terms of tangential fluidic principle, and which is mainly made up of nozzle, swirling head, adjustable cushion and wire net etc.
The dimension of particle is 95mm and spherical (granularity is180 # and material is Corundum), its loading quantity about 2g, nozzle angle 106 and diameter 94 mm, Ra is examined per minute (cycling time is 30 and cycling period is 2 s), the procedure repeats 8times and particles is replaced per time.
Fig.6 The Ra-t curves of different granularities 0 0.5 1 1.5 2 0 1 2 3 4 5 6 7 8 t(min) Ra (µm) 180# 80# Fig.7 The Ra-t curves of different diameters 0 0.5 1 1.5 2 0 1 2 3 4 5 6 7 8 t(min) Ra (µm) 1mm 3mm 5mm 0 0.5 1 1.5 2 0 1 2 3 4 5 6 7 8 t(min) Ra (µm) 5º 15º 30º 0 0.5 1 1.5 2 0 1 2 3 4 5 6 7 8 t(min) Ra (µm) 4mm 3mm 2mm Journal Title and Volume Number (to be inserted by the publisher) 547 Fig.8 The photo for machining effect of cross hole structure Experiment of Part with Blind Hole Structure.
It can be used to refine, deburr, strengthen surface, rinse and remove oxide on the surface of precise hole for different sizes and different materials.
Acknowledgements This project is supported by National Natural Science Foundation (NSF) of China (59875063) and Provincial Natural Science Foundation of Shanxi(981046).

If the ω1 ,ω2,… ωn is each frequency of the every section of the boring bar respectively, then the whole system frequency of the boring bar can be described as: (16) When the whole span is broken down into n section, there are one part inside the work which frequency is annotated as ωin , and (n - 1) parts outside the work which frequency is annotated as ωout , then the formula (16) about whole system frequency of the boring bar can be described as: (17) Case calculation The material of BTA deep-hole boring bar is forging high alloy steel, where E=214×103 Mpa, G=82.9×103 Mpa, ρs=7.87×103 kg/m3 and ρf=0.865×103 kg/m3.
Acknowledgment This research is financially supported by the National Science Foundation of China under grant No. 51075126.
International Journal of Mechanical Sciences,1999,41：1301-1322 [2] Hu Zhanqi, Zhao Wu.
Chinese Journal of Mechanical Engineering, 2005, 41(1): 230~233 [3] Zhao Wu.
Key Engineering Materials, v 455, p 575-579, 2011.

Effect of Bolt Slippage on the Static Response of Lattice Structure Peng Wang1, a, Haibo Chen1, b, Weidong Huang1, Yue Lin1 and Huiwu Zhang2 1 Department of Modern Mechanics, University of Science and Technology of China, CAS Key Laboratory of Mechanical Behavior and Design of Materials , Hefei 230026, Anhui, P.R.
China 2Power Science Institute of Anhui Province, Hefei 230022, China adpwlzu@mail.ustc.edu.cn, bhbchen@ustc.edu.cn (Corresponding author) Keywords: Bolt slippage; Lattice structure; Static response; FEM model; Test comparison.
Specimens are tested using material test system 810(MTS 810) with a loading rate of 0.004mm/s up to failure.
Journal of Tongji University, 2003，31(5)：510-514.
Journal of Structural Engineering, ASCE, 1994,120(8): 2281-2287

The structural material for four-beams and center block is silicon, which has 190GPa as its Young’s modulus, 0.27 as its Poison’s ratio and as its density.
The material for rigid cylinder is plastic, which has 74GPa as its Young’s modulus, 0.17 as its Poison’s ratio and as its density.
The material for micro-structure was the same as above.
Micro- electronics Journal. 38(2007) 1021-1026
Chinese Journal of Sensors and Actuators.24(2011) 517-520．

Moreover, lignite has complex internal structure, which is similar to porous materials.
Acknowledgements This work was financially supported by the National Science & Technology Pillar Program during the Twelfth Five-year Plan Period (2012BAA04B01).
The drying of fine granular material in a pneumatic drier.
Journal of Food Engineering, Vol.48 (2001), p. 301-310
Journal of the Taiwan Institute of Chemical Engineers, Vol.41 (2009), p. 157-161

Direct Torque Control of Brushless DC Motor Long Wu 1a, Liu Yi Ling 2b, Shuai Chen 1c 1Huainan Normal University, Huainan 232001 ; 2 Anhui University Of Science & Technology, Huainan 232001; alwu@hnnu.edu.cn,blyling@aust.edu.cn,cshuaich12@126.com, Keywords: Brushless Motor, Current Commutation Torque Ripple, Matlab Simulation,Direct Torque Control Abstract.
In China rare earth resources are rich and the rotor of brushless motor is constructed with rare earth materials, this further promote the development of brushless motor in our country.
Acknowledgements National Natural Science Foundation (51104003); Natural Science Foundation of Anhui Province (KJ2010B200) Reference [1] Yao Zhiyun, Yang Yuefeng.
Journal of Motor and Control, 2005, vol.9, no 6, pp.533-536.

Motion Performs Evaluation of a Numerical Machine Tool Based on Extenics Theory Chen Liu 1, a, Xiangli Bu 2,b 1 North China Institute of Science and Technology, China, 065201, 2 North China Institute of Science and Technology, China, 065201, aliuchen@ncist.edu.cn, bbuxiangli@ncist.edu.cn Keywords: extenics theory; motion performs evaluation; AHP(analytic hierarchy process); numerical control machine tool Abstract: In order to evaluate motion performs of a numerical control machine tool objectively, the matter-element model for the motion performs evaluation of the NC was established based on extenics theory, the motion performs evaluation indexes of NC was made of multiple elements.
References [1]Zhao Yugang,etc: Technology of Numerical Control, edtied by engineering industry Publishing House, BJ(2003)In Chinese [2]Liu Chen, etc: Quality Evaluation of Belt Conveyor Based on Extenics Theory, Advance Materials Research,Vols.694-697,Mar.2013
[3]Zhang Genbao, etc: A comprehensive evaluation method of fuzzy matter element for CNC equipment quality , Journal of Chongqing University, VOL.34No.1, Jan.2011.
In Chinese [4] Cai Wen,in: Matter-element modle and application, edtied by Literature of Science and Technology Publishing House, BJ(2008).

Experimental research on the frictional effects of the slide-roof system1 ZHANG Liming TIAN Zhichang （Institute of Architecture & Civil Engineering, Inner Mongolia University of Science and Technology） Key words: slide-roof, friction, TMD, roof, isolation, robustness SUMMARY:The experiments of a five-story steel frame on shaking table verify that the slide-roof system can markedly reduce vibration.
The materials of the sliding surfaces are steel-steel, so the static frictional coefficient was about 0.15 and the moving frictional coefficient was about 0.10.
Supported by the fund of Office of Science and Technology, Baotou, China Table 1 Parameters of the experimental models Story Mass(kg) Lateral inter-story stiffness(N•m-1) Story height(m) M-1 M-2 M-1 M-2 1 615 615 3.25×106 3.25×106 0.90 2 615 561 4.58×106 4.58×106 0.80 3 615 615 4.58×106 4.58×106 0.80 4 615 615 4.58×106 4.58×106 0.80 5 720 134 3.82×106 3.82×106 0.85 SRS / 586 / 2.28×105 0.00 Fig.1 Photo of the experimental model Fig.2 Exprimental model of SR Fig.3 The envelops of the displacement histories of the shaking table and Floor 1 excited by harmonic sweep frequency wave with the maximum acceleration 0.57 m/s2 steel-steel kinetic frictional coefficient 0.1 (a) Displacement’s envelop the Shaking table 0 0.5 1 1.5 2 2.5 3 0 20 40 60 Time(s) Disp.
“Optimum friction factor for roof-friction tuned mass damper”, Journal of Tsinghua University (Science and Technology), (S1):, 2002, pp.97-100

In Fig.3, the master rack is drivenby the work-piece, the plus material deviation is defined as positive, while the minus material deviation is defined as negative.The relationship between the displacement increment along left & right meshing line(,) and the radial displacement(),tangential displacement() is as follows: （1） 3.2 Measuring Principle The measuring principle of high-speed inspection in workshops of gears pitch deviations based on the double-flank gear rolling test as follows: The displacement of rack probe in radial & tangential direction(, ) is measured when rack probe mesh with left & right flank of the gear to be inspected.
Acknowledgements This research is supported by the Natural Science Foundation of China grant Nos. 51105007.
References [1] Shi Zhaoyao, FeiYetai and XieHuakun, "100 years of gear measurement technology¾review & prospect", Engineering Science, 5(9), 13-17(2003)
Annals of the CIRP 1984,33(1):363~368 [9] Shi Zhaoyao, Tang Jie, Wei Hualiang, et al, “Gear In-line Measuring Machine Based on Double-flank Gear Rolling Test with many Degrees of Freedom”, Chinese Journal of Scientific Instrument, 2009, Vol.30, No.2, pp.303-307
Shanghai Science & Tech.

Kabeel et al. [3] presented a detailed review of solar still enhancement strategies, focusing on phase change materials and reflective surfaces as key factors in improving distillation productivity.
In 2003, Fath et al [9] identified the potential for optimization in solar desalination systems through design modifications, such as multi-effect distillation and the use of advanced materials.
Al-Hinai et al. [21] found that the double-effect solar stills showed higher productivity compared to single-effect designs, particularly when optimized for temperature gradients and cover materials.
Kalogirou, Seawater desalination using renewable energy sources, Progress in Energy and Combustion Science, 31(3) (2005) 242-281
Journal of the Brazilian Society of Mechanical Sciences and Engineering, 44 (5) (2022) 214.