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The changes of operating patterns bring more flows about material, energy, and information among nodes in weapon equipment system.
Specifically, the relationships between different equipments reflect the flows of the ability, materials and information.
While the information flows usually is the precondition of the one of ability and materials.
Journal of Department of Equipment Command and Administration ,Vol.26(2012): p5-9 [3] Y.
Science management Research, Vol.14(2005): p148-150 [6] J.

Design and Finite Element Analysis on Crown Gear Coupling of High Torque Considering Radial Restriction Ping WANGa, Zhijun ZHENGb, June ZHANGc College of Mechanical Engineering, Tianjin University of Science & Technology, Tianjin 300222, China awp2004@tust.edu.cn, bzhengzj162@163.com, czhangjune06@126.com Keywords: radial restriction, high torque, crown gear coupling, design, finite element analysis.
After the 3-dimensional solid model is imported into software ANSYS 11.0, firstly to define element type (here are solid 45), define material properties; and then mesh the model, the finite element models of the crown gear and a bolt are established by use of Free Mesh.
Then make contact settings, the contacts between the crown gear and the inner gear, flat keys and the sleeve, flat keys and shafts connected are defined by the use of Target 170 and Contact 174, which are all non-linear contacts, the friction coefficient is 0.2, contact rigidity is Young’s modulus of the materials.
Table 1 Comparison of calculated results and analytical results Materials used Admissible stress /MPa Theoretical results /MPa Analytical results /MPa Crown gear 42CrMo (Surface hardening) 255 239 138.2 Inner gear 42CrMo (Modified treatment) 205 199 85.2 Flat key 45 120 109 116.1 Conn. bolt 40Cr 314 245.6 268.3 It can be seen that the results of theoretical calculated and analytical are both less than the admissible stress.
Yi: Journal of Shanghai University Vol. 9, 6(2005), p. 527 [2] C.

Introduction Prepreg composite forming is an important concern in the manufacturing of high performance composite material products.
In addition the composites with thermoplastic matrix are more easily recyclable than thermoset material..
(6) Where {u} is the vector of displacement degrees of freedom, { }is the material co-ordinate vector, [M] is the mass matrix, and are internal and external loads vectors of the system, is Lagrange multiplier vector and its components are slave nodal contact forces, is an index of calculation step, [G] is a surface contact displacement constraint matrix.
Journal of Materials Science 41:6725-6736 [25] Carpenter Nicholas J, Taylor Robert L, Katona Michael G.

At last, the materials used for test cut (for example: nylon, wood, engineering plastic) are cheaper than metal.
Table 1 The selection of main components Parts Name Model Size Power Material Spindle Motor TH27JB520 Φ36.5x50.5 5W Linear Guide MGN9 wide9mm HSS(quenching) Ball Screw NSK1204/THK1405 D=14/12 HSS(quenching) Chuck K01-50 maximum machining d=40mm Bearing S6804ZZ/S6812ZZ 20/72（internal diameter） Bearing steels Fig.4 The diagram of control board interface Fig.5 The interface diagram of micro-switch and card The design of control system Introduction of Mach3.
This model can cut softer materials, and at the same time ensure the limiting accuracy.
Acknowledgment The authors gratefully acknowledge the financial support provided under the Tianjin University of technology and education science and research Funds (No.
Designing and Refitting Practice on Numerical Control Lathe of Economical Model, Journal of Zhejiang Vocational and Technical Institute of Transportation, 2003,4(1) : 24～26 [7] Jiang Zhifang.

VR can also protect the natural tourism resources, damaged and even destroyed precious ancient architecture and oral non- material cultural heritage.
Acknowledgements This work was financially supported by the National Natural Science Foundation of China (41271149).
The Study of Digital Scenic Spot [J].Journal of Capital Normal University (Natural Science Edition),2010,31(6), p.74-80.
Discuss on the Present Features and Questions of Digital Scenic Spot [J].Journal of Capital Normal University (Natural Science Edition),2011,32(5). p.43.

Zhai, Status analysis and Control Countermeasures of pneumoconiosis in China's coal industry,China safety production science and technology. 7(2011)148-151
Cui, Application of closed stockyard in the closed reconstruction of Shougang raw material yard,Engineering and technology. 2(2015)3-9
Li, Studies of surface characteristics and wetting mechanism of respirable coal dust,Mining Science and Technolory. 3(2010)365-317
Han, Synthesis and application properties of novel acrylate dust suppressor,Journal of Beijing University of Chemical Technology: Natural Science Edition. 34(2007)78-81
Dong, Study on the performance of instant dust suppressor for dust control in construction,Journal of safety and environment. 19(2019)2088-2094.

Cassembly under_tab chara_tab … Cpart Material Heattreat … Fig.4 CbaseOb and its subclass CSelect key_tab mate_tab ele_tab sel_result … CCompcopy refine_tab above_ID source_ID … A1 P1 P2 P3 P4 Fig.5 Component and its underlines Case Study.
Acknowledgment This research was supported by NSFC (Nature and Science Foundation of China) research grants under projects no. 50505017 and no. 5077511.
References [1] MA Mingxu FAN Yushun: Chinese Journal of Mechanical Engineering Vol.42(9) (2006), p. 83 [2] Luo Hu, Fan Da-peng: Mechanical Science and Technology Vol.25(8) (2006), p. 887 [3] ZHENG Shu; LU Chang-ming: Group Technology & Production Modernization Vol. 24(1) (2007), p. 54-56 [4] Cláudio R: Fatigue behaviour and structural integrity of scratched damaged shot peened surfaces at elevated temperature, PhD thesis (University of Portsmouth, Portsmouth 2005) [5] Qian Xiao-Ming,Wang Ning-Sheng: Mechanical Science and Technology Vol. 22(4) (2003), p. 670 [6] Lars Hvamy: International Journal of Production Research VOL. 39(5) (2001), p. 873 [7] Qian Xiao-Ming,Wang Ning-Sheng: Computer Integrated Manufacturing System Vol. 9 (1) (2003), p.11

At the same time, it can generate sufficient dissolved oxygen to improve hypoxia in the deep water and accelerate oxygenolysis of the deposited material in the bottom to improve water quality.
(In Chinese) [6] Mulian Ren, Zhilin Yang, Chinese Journal of Fisheries 1996, 9, 1.
(In Chinese) [11] Lu Zhou, Qingzhang Zhu, Lang Wei, etc., Guizhou Agricultural Sciences 2011, 39, 176.
(In Chinese) [14] Xingyong Wang, Jun Guo, Journal of China Institute of Water Resources and Hydropower Research 2005, 3, 222.
[24] Wenxian Guo, Ziqiang Xia, Yuankun Wang, Advances in Water Science 2009, 554.

Research on Open and Close Characteristics of Passive Shuttle-type Anti-water-attack Check Valve Xiang Beiping1,2 a, Yin Guofu1,b , Zeng Xiangwei2,c, Zang Hongbin2 1 Manufacture Science and Engineering School of Sichuan University, Chengdu, China 2 Manufacture Science and Engineering School of South-West University of Science and Technology, Mianyang, China axiangbeiping@163.com, b gfyin@scu.edu.cn, c kxzxw@163.com Keywords: shuttle-type; water-attack; check valve; Open and Close Characteristics Abstract：Water-attack is very harmful to pressure pipeline system security.
In rigid pipeline, only elastic coefficient of pipeline material is taken into account, the transient liquid movement transmitted by compressional wave is involved, while elastic move, such as longitudinal wave, bending wave, cutting wave, etc, and its reciprocity between liquid in the pipeline are not necessary.
Nonlinear Phenomenon in Hydraulic System [J].Journal of Fluid Control 1998, 18(4): 48-52
[8] Chen Yijie, Yang Zhanhua, etc, Influence of hydro-pneumatic spring throttle orifice upon water hammer of a valve [J].Journal of vibration and shock. 2010.29(7):75-78.

Flow exists between the individual and the environment or individual and individual in the form of material flow, energy flow or information flow.
Acknowledgement The financial support from the National Natural Science Foundation (51149013) is gratefully acknowledged.
Zhao: Analysis and research of decision-making method in modern water resources system (Science Press, Beijing, May, 2010.
Journal of Economics of Water Resources, Vol.25,No. 4, pp.8-10, 2007.
“Computational analysis of water resources optimal allocation of Wen Shan Region in Yunnan Province” Journal of Yellow River Conservancy Technical Institute, Vol.23,No.2, pp. 1-4, 2011.