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| 1 | The stability analysis of rolling motion of hypersonic vehicles and its validations显示文摘The stability of the rolling motion of near space hypersonic vehicles with rudder control is studied using method of qualitative analysis of nonlinear differential equations,and the stability criteria of the deflected rolling motions are improved.The outcomes can serve as the basis for further study regarding the influence of pitching and lateral motion on the stability of rolling motion.To validate the theoretical results,numerical simulations were done for the rolling motion of two hypersonic vehicles with typical configurations.Also,wind tunnel experiments for four aircraft models with typical configurations have been done.The results show that:1)there exist two dynamic patterns of the rolling motion under statically stable condition.The first one is point attractor,for which the motion of aircraft returns to the original state.The second is periodic attractor,for which the aircraft rolls periodically.2)Under statically unstable condition,there exist three dynamic patterns of rolling motion,namely,the point attractor,periodic attractor around deflected state of rolling motion,and double periodic attractors or chaotic attractors. | YE YouDa ZHAO ZhongLiang TIAN Hao ZHANG XianFeng | 2014 | Science China(Physics,Mechanics & Astronomy)2014，57，12： | 8 |
| 2 | Prediction-based Manufacturing Center Self-adaptive Demand Side Energy Optimization in Cyber Physical Systems显示文摘Cyber physical systems(CPS)recently emerge as a new technology which can provide promising approaches to demand side management(DSM),an important capability in industrial power systems.Meanwhile,the manufacturing center is a typical industrial power subsystem with dozens of high energy consumption devices which have complex physical dynamics.DSM,integrated with CPS,is an effective methodology for solving energy optimization problems in manufacturing center.This paper presents a prediction-based manufacturing center self-adaptive energy optimization method for demand side management in cyber physical systems.To gain prior knowledge of DSM operating results,a sparse Bayesian learning based componential forecasting method is introduced to predict24-hour electric load levels for specific industrial areas in China.From this data,a pricing strategy is designed based on short-term load forecasting results.To minimize total energy costs while guaranteeing manufacturing center service quality,an adaptive demand side energy optimization algorithm is presented.The proposed scheme is tested in a machining center energy optimization experiment.An AMI sensing system is then used to measure the demand side energy consumption of the manufacturing center.Based on the data collected from the sensing system,the load prediction-based energy optimization scheme is implemented.By employing both the PSO and the CPSO method,the problem of DSM in the manufacturing center is solved.The results of the experiment show the self-adaptive CPSO energy optimization method enhances optimization by 5%compared with the traditional PSO optimization method. | SUN Xinyao WANG Xue WU Jiangwei LIU Youda | 2014 | Chinese Journal of Mechanical Engineering2014，27，3： | 4 |
| 3 | The stability of rolling motion of hypersonic vehicles with slender configuration under pitching maneuvering显示文摘The configurations of near space hypersonic flying vehicles are considerably different from those of conventional aircrafts.Their configurations are relatively slender;hence their moment of inertia around the longitudinal axis is much smaller than those around the other two axes,resulting in strong coupling of rotations around the three axes.Thus,the stability analysis of rolling motion for such flying vehicles is more complicated than those for conventional aircrafts,and there is no available result of stability analysis which can readily be applied to such cases.This paper is mainly concerned with the stated problem.Considering the practical situation,our investigation is targeted a slightly simpler problem,namely the rolling stability of flying vehicle under known pitching motion.The stability criterion of rolling motion is obtained with and without lateral motions.We also conducted numerical simulation for the pitching-rolling coupled motions of flying vehicles by solving Navier-Stokes equations coupled with dynamic equations of flight.The results of simulation agree well with those of theoretical analysis and experiments. | YE YouDa TIAN Hao ZHANG XiaFeng | 2015 | Science China(Physics,Mechanics & Astronomy)2015，58，6： | 4 |
| 4 | Reliability of measurements of cervical spine range of motion-comparison of three methods显示文摘 | Youdas JW Carey JR Garrett TR | | 0，，02： | 1 |
| 5 | Muscle activation levels of the gluteus maximus and medius during standing hip-joint-strengthening exercises using elastic-tubing resistance显示文摘 | Youdas J W Adams K E Bertucci J E | 2014 | Journal of Sport Rehabilitation2014，23，1： | 1 |
| 6 | Normal range of mo-tion of the cervical spine: an initial goniometric study 显示文摘 | Youdas JW Garrett TR Suman VJ | 1992 | PhysTher1992，72，11： | 1 |
| 7 | Normal range of motion of the cervical spine: an initial goniometric study显示文摘 | Youdas JW Garrett TR Suman VJ | 1992 | Phys Ther1992，72，11： | 1 |
| 8 | A quantitative analysis of donor site morbidity after vascularized fibular transfer显示文摘 | Youdas JW Wood MB Cahalan TD | 1998 | J Orthop Res1998，6，： | 1 |
| 9 | Normal range of motion of the cervical spine:an initial goniometric study显示文摘 | Youdas JW Garrett TR Suman VJ | | 0，，： | 1 |
| 10 | A quantitative analysis of donor site morbidity after vascularized fibula transfer显示文摘 | Youdas JW Wood MB Cahalan TD | 1988 | J Orthop Res1988，6，： | 1 |
| 11 | Sers study on inhibition mechanisms of benzotriazole and its derivatives for copper corrosion in sulphate solutions显示文摘 | NISHIHARA H ARAMAKI K | 1988 | Corrosion Science1988，28，： | 1 |
| 12 | How does the rarefaction of the air affect hypersonic vehicles显示文摘The scope,physical concept,and mathematical model for describing how the rarefaction of the air affects on hypersonic flows have been discussed.A new method,namely the data improved Naive-Stroke(DiNS)model,was proposed for the computation of hypersonic shear flows around vehicles flying at altitude of 30-100 km.Validation of the new continuum method has also been done. | Youda Ye | 2021 | Acta Mechanica Sinica2021，37，1： | 1 |
| 13 | Agreement between the GAITRite walkway system and a stopwatch-footfall count method for measurement of temporal and spatial gait parameters 显示文摘 | Youdas JW Hollman JH Aalbers M J | 2006 | Arch Phys Med Rehabil2006，87，12： | 1 |
| 14 | Lumbar lordosis and pelvic inclination in adults with chronic low back pain显示文摘 | Youdas JW Garrett TR Egan KS | 2000 | Phys Ther2000，80，3： | 1 |
| 15 | A SERS study on inhibition mechanisms of benzotriazole and itsderivatives for copper corrosion in sulphate solutions显示文摘 | Youda R | 1988 | Corrosion Science1988，28，1： | 1 |
| 16 | The influence of gender and age on hamstring muscle length in healthy adults 显示文摘 | Youdas JW Krause DA Hollman JH | 2005 | J Orthop Sports Phys Ther2005，35，4： | 1 |
| 17 | Reliability of measurements of cervical spine range of motion--comparison of three methods显示文摘 | Youdas JW Carey JR Garrett TR | 1991 | Phys Ther1991，71，2： | 1 |
| 18 | Normal range of motion of the cervical spine:an initial goniometric study显示文摘 | Youdas JW Garrett TR Suman VJ | 1992 | Phys Ther1992，72，11： | 1 |
| 19 | Numerical Application of the Flamelet Model to Supersonic Turbulent Combustion显示文摘In this study,the flow field structure inside a scramjet combustor is numerically simulated using the flamelet/progress variable model.Slope injection is considered,with fuel mixing enhanced by means of a streamwise vortex.The flow field structure and combustion characteristics are analyzed under different conditions.Attention is also paid to the identification of the mechanisms that keep combustion stable and support enhanced mixing.The overall performances of the combustion chamber are discussed. | Yongkang Zheng Qinxue Jiang Hao Tian Youda Ye Jingying Wang | 2022 | Fluid Dynamics & Materials Processing2022，18，4： | 0 |
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