Science in China Series E: Technological Sciences
Công bố khoa học tiêu biểu
* Dữ liệu chỉ mang tính chất tham khảo
Sắp xếp:
Simultaneous measurement of particle velocity and size based on gray difference and ai]tocorrelation
Science in China Series E: Technological Sciences - - 2010
A wake bending unsteady dynamic inflow model of tiltrotor in conversion flight of tiltrotor aircraft
Science in China Series E: Technological Sciences - Tập 52 - Trang 3188-3197 - 2009
The aerodynamics, dynamic responses and aeroelasticity of tiltrotor aircraft in the tilting of rotor i.e. in conversion flight are extraordinarily complicated. The traditional quasi-steady assumption model can not reflect the unsteady aerodynamic problems in the tilting of rotor. The CFD method based on the vortex theory can get better results, but it consumes a lot of computing resources. In this...... hiện toàn bộ
Effects of compressive stress on the nonlinear electromechanical behavior of ferroelectric ceramics
Science in China Series E: Technological Sciences - Tập 49 - Trang 29-37 - 2006
The effects of compressive stress parallel and perpendicular to the polar axis of PZT ceramics on the nonlinear electromechanical behavior of the materials has been experimentally studied. A domain-switching model that divides each 180° switching to two successive 90° switching is proposed to explain these effects. In the case of stress parallel to the polar axis, domain switching in the ceramics ...... hiện toàn bộ
Decentralized estimation of sensor systematic error and target state vector
Science in China Series E: Technological Sciences - Tập 46 - Trang 287-295 - 2003
An accurate estimation of the sensor systematic error is significant for improving the performance of target tracking system. The existing methods usually append the bias states directly to the variable states to form augmented state vectors and utilize the conventional Kalman estimator to achieve state vectors estimate. So doing is expensive in computation, and much work is devoted to decoupling ...... hiện toàn bộ
Gust response modeling and alleviation scheme design for an elastic aircraft
Science in China Series E: Technological Sciences - Tập 53 - Trang 3110-3118 - 2010
Time-domain approaches are presented for analysis of the dynamic response of aeroservoelastic systems to atmospheric gust excitations. The continuous and discrete gust inputs are defined in the time domain. The time-domain approach to continuous gust response uses a state-space formulation that requires the frequency-dependent aerodynamic coefficients to be approximated with the rational function ...... hiện toàn bộ
Switching circuits based on comparison operations and multiple-β transistor
Science in China Series E: Technological Sciences - Tập 40 - Trang 439-448 - 1997
By using comparison operations, three basic operations, AND, OR and NOT, in Boolean algebra are re-defined. Based on the characteristic that the voltage signals are easy to implement comparison operation, various logic functions realized by connecting emitters of the bipolar transistor are analyzed. Furthermore, a novel multiple-β transistor and the linear AND-OR gate, whichis composed of the tran...... hiện toàn bộ
An exploration for the macroscopic physical meaning of entropy
Science in China Series E: Technological Sciences - Tập 53 - Trang 1809-1816 - 2010
The macroscopic physical meaning of entropy is analyzed based on the exergy (availability) of a combined system (a closed system and its environment), which is the maximum amount of useful work obtainable from the system and the environment as the system is brought into equilibrium with the environment. The process the system experiences can be divided in two sequent sub-processes, the process at ...... hiện toàn bộ
Overall test evaluation based on trajectory tracking data
Science in China Series E: Technological Sciences - Tập 44 - Trang 149-157 - 2001
According to the trajectory characteristics of ballistic missile, a reduced parameter model is constructed based on difference between telemetry trajectory and trajectory tracking data. By virtue of Bayesian theory and data fusion technique, a new test evaluation method is put forth, which can make full use of the trajectory tracking data, shooting range test data and relevant information. Since t...... hiện toàn bộ
Static aeroelastic analysis of a high-aspect-ratio wing based on wind-tunnel experimental aerodynamic forces
Science in China Series E: Technological Sciences - Tập 54 - Trang 2716-2722 - 2011
The aeroelastic responses of a high-aspect-ratio wing are investigated based on nonlinear experimental aerodynamic forces. The influences of nonlinear experimental aerodynamic forces and dynamic pressures on the wing loads are studied in the longitudinal and lateral maneuver states. The flight loads of the wing fixed at the root are calculated at different angles of attack. The aileron efficiency ...... hiện toàn bộ
Study on flow behavior and structure over chined fuselage at high angle of attack
Science in China Series E: Technological Sciences - Tập 53 - Trang 2057-2067 - 2010
A study of leeward vortex structure over chined fuselage and the effects of micro tip perturbation on its vortex flow have been carried out in wind tunnel experiments at Reynolds numbers from 1.26×105 to 5.04×105 with PIV and pressure measurement techniques. Firstly, the experiment results have proved that micro tip perturbation has no effects on the vortex flow and its aerodynamic characteristics...... hiện toàn bộ
Tổng số: 1,629
- 1
- 2
- 3
- 4
- 5
- 6
- 10