In this paper we demonstrate the influence of models non-linearities to harmonic balance simulation software, such as Agilents’ ADS. Furthermore, we show how the large signal behavior in terms of convergence speed, time and region can be improved significantly. All methods proposed can be used for any kind of non-linear model, either analytical equations based or even table interpolated ones. I...

A model for volume hologram formation in thick dichromated gelatin fih-ns is given. Using the model and a few basic film measurements, we can quantify the index modulation vs. exposure curve. The effects of saturation and dynamic absorption increase during exposure are considered in the generation of spatial harmonics. The effects of exposure with non-unity beam-ratio and multiple incoherent ex...

Social network analysis is a rapid expanding interdisciplinary field, growing from work of sociologists, physicists, historians, mathematicians, political scientists, etc. Some methods have been commonly accepted in spite of defects, perhaps because of the rareness of synthetic work like (Freeman, 1978; Faust & Wasserman, 1992). In this article, we propose an alternative index of closeness cent...

One of the important factors influencing outdoor insulators performance is pollution phenomenon. The pollution, especially during humidity condition, reduces superficial resistance of insulator and lead to a flow of Leakage Currents (LC) on the insulator surface, which may result in total flashover. The LC characteristics are affected by parameters such as nature and severity of pollution. Loca...

OBJECTIVE The purposes of this study were to estimate suicide rates up to 4 years after a deliberate self-harm episode, to investigate time-period effects on the suicide rate over the follow-up period, and to examine potential sociodemographic and clinical predictors of suicide within this cohort. METHOD This prospective cohort study included 7,968 deliberate self-harm attendees at the emerge...

BACKGROUND Rates of self-harm are high and have recently increased. This trend and the repetitive nature of self-harm pose a significant challenge to mental health services. AIMS To determine the efficacy of a structured group problem-solving skills training (PST) programme as an intervention approach for self-harm in addition to treatment as usual (TAU) as offered by mental health services. ...

Objectives To examine whether the "prevention paradox" applies to British individuals in relation to gambling-related harm. Methods Data were derived from 7,756 individuals participating in the British Gambling Prevalence Survey 2010, a comprehensive interview-based survey conducted in Great Britain between November 2009 and May 2010. Gambling-related harm was assessed using an adapted version ...

The emergence of second-harmonic generation (SHG) is a pivotal issue to the development of nano-optical devices and interfaces. Here, we perform a classical analysis of the SHG dynamics with the aim of determining critical values of the electric field. The signals of the SHG process are nonlinear, so it seems reasonable that chaos theory can be a suitable tool to analyze their dynamics. For thi...

Abstract Aiming at the problems of voltage fluctuation and harmonics in photovoltaic grid connection, improvement a three-phase rectifier circuit is proposed, results are verified by MATLAB simulation. At same time, this paper also puts forward application four-wire three-level parallel APF structure Three-term PWM rectification technology. By compensating harmonic current generated controlling...

drought stress is one of the most important dangers for increasing the yield and good production of crops in iran and the world. to evaluate the genetic diversity of rapeseed genotypes, identifying the drought resistance indices and drought tolerant genotypes, 16 genotypes were tested in a randomized complete block design (rcbd) with three replications and two different water regimes (irrigated...