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- Kok Wai Chang
- 1972

This paper treats the boundary problem \[\begin{gathered} y' = A(t)y + B(t)z, \hfill \\ \varepsilon z' = C(t)y + D(t)z, \hfill \\ M(\varepsilon )\left( {\begin{array}{*{20}c} {y(0,\varepsilon )} \\… (More)

- Hui Wang, Kok Wai Chang, +4 authors John J. Berenz
- GaAs IC Symposium Technical Digest
- 1992

Monolithic W-band voltage control oscillators (VCOs) have been developed based on 0.1- mu m pseudomorphic AlGaAs/InGaAs/GaAs low noise and power high-electron-mobility transistor (HEMT) technologies.… (More)

- Kok Wai Chang
- 1974

Abstract The nonlinear boundary value problem ϵy ″ + f ( t , ϵ , y , y ′) = 0, y (0, ϵ ) = α ( ϵ ), y (1, ϵ ) = β ( ϵ ), where ϵ > 0 is a small parameter and y , f are scalar functions, has been… (More)

I. Introduction.- II. A'priori Bounds and Existence Theorems.- III. Semilinear Singular Perturbation Problems.- IV. Quasilinear Singular Perturbation Problems.- V. Quadratic Singular Perturbation… (More)

The performance of the magnetostatic surface wave straight-edge resonator (MSSW-SER) is presented. The resonator uses a rectangular YIG film to propagate MSSWs where the straight edge serves as a… (More)

- Kok Wai Chang
- 1969

Our aims are to prove the following theorem and to apply the result to remove a hypothesis (hypothesis (A) below) which has been imposed in many papers on singular perturbations. THEOREM. Let e be a… (More)

- Kok Wai Chang
- 1968

Measurement of optical phase and frequency deviations using a frequency-domain network analysis approach is described. The frequency domain transfer functions are given which relate the conversion of… (More)

An upconversion laser operating simultaneously at visible wavelengths of 520 and 490 nm under infrared semiconductor pumping is demonstrated. The Pr3+/Yb3+doped ZBLAN fluorozirconate fiber laser… (More)