In the conventional weighted Gerchberg-Saxton (GS) algorithm, feedback is used to accelerate convergence. However, it will lead iteration divergence. To solve this issue, an adaptive GS algorithm proposed in paper. By replacing with our designed feedback, convergence can be ensured method. Compared traditional method, method improves peak signal-noise ratio of reconstructed image 4.8 dB on aver...

In free-space optical (FSO) communications, the orbital angular momentum (OAM) multiplexing/demultiplexing of Bessel beams perturbed by atmospheric turbulence is great significance. We used Gerchberg-Saxton algorithm without a beacon beam to compensate for aberrant helical phase distorted turbulent atmosphere. The vortex Dammann axicon grating was applied simultaneous measurement intensities de...

variables as input (e.g., Rawls and Brakensiek, 1985; Ahuja et al., 1989; Vereecken et al., 1989; Schaap et In many vadose zone hydrological studies, it is imperative that the al., 1998). Far fewer alternatives exist for unsaturated soil’s unsaturated hydraulic conductivity is known. Frequently, the Mualem–van Genuchten model (MVG) is used for this purpose behydraulic conductivity. Although som...

Frequently undesirable outputs are produced together with desirable. This joint production of bad and good outputs in connection with environmental decision models is the subject of this paper. Recently Haynes, Ratick, Bowen and Cummings-Saxton (1993) addressed the same subject matter. They observed that: "... input resources, including the chemicals of concern, produce as joint products the sa...

1 Ptychography is a lensless coherent di¤ractive imaging that uses intensity measurements of multiple di¤raction patterns collected with a localized illumination probe from overlapping regions of an object. A novel iterative algorithm is proposed targeted on optimal processing noisy measurements. The noise suppression is enabled by two instruments. First, by the maximum likelihood technique for...

A neural-network architecture of multifaceted planar interconnection holograms and optoelectronic neurons is analyzed. Various computer-generated hologram techniques are analyzed and tested for their ability to produce an interconnection hologram with high-accuracy interconnects and high diffraction efficiency. A new technique is developed by using the Gerchberg-Saxton algorithm, followed by a ...

In this article, we propose a reference light wave multiplexing scheme to increase the information capacity of computer-generated holograms. The holograms were generated by different waves and superimposed together as multiplexed hologram. A modified Gerchberg–Saxton algorithm was used improve image quality, images could be reconstructed when hologram illuminated corresponding waves. We perform...