1. That leads to biquadratic equations for solution.

2. A design method of general biquadratic OTA-C filter is presented.

3. D dissertation is concerned with the dynamics of biquadratic polynomials.

4. RLD had a biquadratic polynomial trend as the depth of soil increased.

5. A general biquadratic realization is also proposed with this SI circuit.

6. Two voltage-mode universal biquadratic filters using positive four-terminal floating nullors (PFTFNs) are presented. Each one of the proposed filters using two PFTFNs.

7. Based on the building blocks of biquadratic transfer function and voltage amplifer, and by using the SFG approach, four families of OTA-C sinusoidal oscillators are designed.

8. The global topological structure of the biquadratic systems is discussed and their coefficient conditions are given.

9. The formula shows that the propagation error from biquadratic polynomial is the same as the error from linear polynomial.

10. A new configuration for realizing voltage-mode universal biquadratic filter by using three current-feedback amplifiers (CFAs), two capacitors and four resistors is presented.

11. Parametric biquadratic equation whose roots are characteristic wave numbers is obtained after setting the determinant of eigen matrix to zero.

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12. In the paper, large deformation of symmetry fission has been described by a biquadratic surface revolution instead of several quadratic equations.

13. The main contents and contributions include: 1) On basis of the defined biorthogonality, we propose several biquadratic cost functions for array-signal blind separation.

14. In this paper, the approximation of the second order parabolic equation is studied with the anisotropic biquadratic element.

15. Some of the derived filter types from the proposed universal biquadratic filter enjoy the advantage of having one (or two) more simultaneous output filter responses.

16. In this paper, the approximation of order parabolic equation is studied with the anisotropic biquadratic element.

17. The approximation of the parabolic integro-differential equations is studied with anisotropic biquadratic finite element.

18. Double angle formula can transform the circular function equation to a biquadratic algebraic equation, and the analysis solution can be solved by extract equation directly.

19. The second algorithm is to resize an image based on biquadratic B-spline local interpolation.

20. The models of SC Conductance and impedance with finite gain op amp are established. From these models, an analysis of finite gain effect on biquadratic SCF is made.