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浏览/检索结果: 共17条，第1-10条 帮助

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THE EFFECTS OF THE AIR-FUEL VELOCITY RATIO ON TURBULENT NON-PREMIXED BLUFF-BODY FLAMES 会议论文  OAI收割
Charlotte, NC, JUN 26-30, 2017
作者:  Yang T;  Zhang J(张健);  Zhang, J (reprint author), Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China.
收藏  |  浏览/下载：45/0  |  提交时间：2018/01/16
Catoptrical rough set model on two universes using granule-based definition and its variable precision extensions 期刊论文  OAI收割
Information Sciences, 2017, 卷号: 390, 页码: 70-81
作者:  Dai, Jianhua;  Han, Huifeng;  Zhang, Xiaohong;  Liu, Maofu;  Wan, Shuping
收藏  |  浏览/下载：69/0  |  提交时间：2016/05/23
A new algorithm for solving the best-fit sphere of optical aspherical surface (EI CONFERENCE) 会议论文  OAI收割
2nd International Conference on Advances in Materials and Manufacturing, ICAMMP 2011, December 16, 2011 - December 18, 2011, Guilin, China
作者:  Lin J.;  Lu M.
收藏  |  浏览/下载：56/0  |  提交时间：2013/03/25
To solve the best-fit sphere (BFS) accurately is one of the technological keys for the generating and testing of optical aspherical surfaces. This paper presents a new algorithm for solving the BFS of aspherical surfaces to suppress some deficiencies in the existing BFS algorithms. In the proposed approach  it is not only suitable for the conic surface  a BFS is constructed  but also for higher order aspheres. The obtained asphericity and material removal function is more suitable for the machining and test. (2012) Trans Tech Publications  which passes through both sides of endpoints in the section o -?xy of the aspherical surfaces  Switzerland.  the center of the BFS is shifted along the x-axis  and its radius of curvature is automatically computed. The variable step size method is proposed to speed up the convergence of the iteration. Through numerically solving the BFS of conic and cubic surface  the advantages of the proposed approach are verified. The results show that the proposed approach is of rapid convergence  and high accuracy  
Reagentless near-infrared determination of cholesterol in undiluted human serum using interval partial least square (EI CONFERENCE) 会议论文  OAI收割
2011 International Conference on Smart Materials and Nanotechnology in Engineering, SMNE 2011, September 17, 2011 - September 18, 2011, Wuhan, China
Gao H.; Lu Q.; Huang F.
收藏  |  浏览/下载：54/0  |  提交时间：2013/03/25
In order to determination of cholesterol in human serum with no reagent using nearinfrared (NIR) spectroscopy. Interval partial least square (iPLS) was proposed as an effective variable selection approach for multivariate calibration. For this purpose  an independent sample set was employed to evaluate the prediction ability of the resulting model. The spectrum was split into different interval. Then  the informative region of cholesterol (1688-1760nm)  in which the PLS model has a low RMSEP with 0.241mmol/L and a high R with 0.975  is selected with 23 intervals. The results indicate that  the informative region of cholesterol can be obtained by iPLS and applied to design the simpler reagentless NIR instruments for inexpensive cholesterol measurement in future. (2012) Trans Tech Publications  Switzerland.  
Research on model reference sliding mode control in roll stabilization of aerocraft (EI CONFERENCE) 会议论文  OAI收割
2011 International Conference on Electric Information and Control Engineering, ICEICE 2011, April 15, 2011 - April 17, 2011, Wuhan, China
Chu H.-R.
收藏  |  浏览/下载：54/0  |  提交时间：2013/03/25
Aimed at aerospace roll stabilization  control arithmetic based on model reference sliding mode variable structure theory and chattering reduction arithmetic are formulated. Correctness and validity of arithmetic are analyzed. With flight dynamics  the roll-loop mathematic model and reference model are established. Sliding hyperplane is deduced based on model reference sliding mode variable structure theory. Combing with reaching law  control law is derived  and stability of roll-loop is analyzed. Chattering of aileron instructions is alleviate by using boundary layer approach. Digital flying simulation result shows that variable structure control arithmetic realized roll stabilization control  the roll angle is less than 5.3 under powered flight  and that of unpowered flight is less than 0.5  respectively. The command fin angle is less than 1.5. High frequency chattering of fin command nearby the minimum velocity was trailed off by chattering reduction arithmetic. The sliding mode control arithmetic show good performance when aerodynamic coefficients varies 20%. The control arithmetic is easy to be implemented for its simplicity. 2011 IEEE.  
Interaction between line soliton and algebraic soliton for asymmetric Nizhnik-Novikov-Veselovequation 期刊论文  OAI收割
COMMUNICATIONS IN THEORETICAL PHYSICS, 2008, 卷号: 49, 期号: 6, 页码: 1547-1552
作者:  Ruan Hang-Yu;  Li Zhi-Fang
  |  收藏  |  浏览/下载：35/0  |  提交时间：2018/07/30
New doubly periodic waves of the (2+1)-dimensional double sine-Gordon equation 期刊论文  OAI收割
chin. phys. lett., 2007, 卷号: 24, 期号: 1, 页码: 1, 4
Hu Heng-Chun; Zhu Hai-Dong
收藏  |  浏览/下载：1295/348  |  提交时间：2009/09/18
Structures and interactions of soliton in (2+1)-dimensional generalized Nizhnik-Novikov-Veselov equation 期刊论文  OAI收割
COMMUNICATIONS IN THEORETICAL PHYSICS, 2005, 卷号: 43, 页码: 31-38
作者:  Ruan, HY
  |  收藏  |  浏览/下载：30/0  |  提交时间：2018/05/31
Variable separation approach for a differential-difference asymmetric Nizhnik-Novikov-Veselov equation 期刊论文  OAI收割
ZEITSCHRIFT FUR NATURFORSCHUNG SECTION A-A JOURNAL OF PHYSICAL SCIENCES, 2004, 卷号: 59, 期号: 10, 页码: 645-658
作者:  Qian, XM;  Lou, SY;  Hu, XB
  |  收藏  |  浏览/下载：33/0  |  提交时间：2018/07/30
General characteristics of single shaft microturbine set at variable speed operation and its optimization 期刊论文  OAI收割
APPLIED THERMAL ENGINEERING, 2004, 卷号: 24, 期号: 13, 页码: 1851-1863
作者:  Wang, W;  Cai, RX;  Zhang, N
收藏  |  浏览/下载：42/0  |  提交时间：2015/12/17