893 resultados para Controlli automatici termoregolazione temperatura PID TBH Clegg Nelder-Mead


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This chapter explores the links between organised crime and the environment, and examines the regulatory and environmentalist responses to this growing issue of global concern.

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Amidst a proliferation of bestseller books, blockbuster films, television documentaries and sensational news reports, public awareness campaigns have claimed their place in a growing chorus of concern about the crime of human trafficking. These campaigns aim to capture the public’s support in efforts to eliminate a ‘modern slave trade’ in which individuals seeking a better life are transported across borders and forced into exploitative labour conditions. Constrained by the limitations of primary campaign materials (posters, print ads, billboards) typically allowing for only a single image and minimal text, it is unlikely that these awareness campaigns can accurately convey the complexity of the trafficking problem. This chapter explores how the depictions of trafficking victims in awareness campaigns can exclude those who do not fit a restrictive narrative mould. Nils Christie’s pivotal work on the construction of society’s ideal victim is the lens through which this paper examines the literal ‘poster child’ of the anti-trafficking movement.

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The existence of intimate partner violence within non heterosexual and/or noncisgendered relationships is gaining greater recognition. There are a handful of community organisations that offer services and assistance to victims and perpetrators of this violence (particularly gay men and lesbians), and the body of research literature in this area is slowly growing. While some critiques warn of the dangers of applying the theoretical and conceptual tools developed to understand relationship violence among heterosexuals directly to queer relationships, the inclusion of queer relationships in these discourses has for the most part been celebrated as a positive step forward, addressing the historical invisibility of sexual minorities in these areas. Nevertheless, the debate about how best to understand and represent the experience of violence in these communities continues, with the focus being to determine whether it is better to expand the tools used to understand heterosexual intimate partner violence to include queer communities, or whether new tools are necessary in order to understand their experiences...

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The numerical solution of stochastic differential equations (SDEs) has been focused recently on the development of numerical methods with good stability and order properties. These numerical implementations have been made with fixed stepsize, but there are many situations when a fixed stepsize is not appropriate. In the numerical solution of ordinary differential equations, much work has been carried out on developing robust implementation techniques using variable stepsize. It has been necessary, in the deterministic case, to consider the "best" choice for an initial stepsize, as well as developing effective strategies for stepsize control-the same, of course, must be carried out in the stochastic case. In this paper, proportional integral (PI) control is applied to a variable stepsize implementation of an embedded pair of stochastic Runge-Kutta methods used to obtain numerical solutions of nonstiff SDEs. For stiff SDEs, the embedded pair of the balanced Milstein and balanced implicit method is implemented in variable stepsize mode using a predictive controller for the stepsize change. The extension of these stepsize controllers from a digital filter theory point of view via PI with derivative (PID) control will also be implemented. The implementations show the improvement in efficiency that can be attained when using these control theory approaches compared with the regular stepsize change strategy.

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Two simple and effective control strategies for a multi-axle heavy truck, modified skyhook damping (MSD) control and proportional-integration-derivative (PID) control, were implemented into functional virtual prototype (FVP) model and compared in terms of road friendliness and ride comfort. A four-axle heavy truck-road coupling system model was established using FVP technology and validated through a ride comfort test. Then appropriate passive air suspensions were chosen to replace the rear tandem suspensions of the original truck model for preliminary optimization. The mechanical properties and time lag of dampers were taken into account in simulations of MSD and PID semi-active dampers implemented using MATLAB/Simulink. Through co-simulations with Adams and MATLAB, the effects of semi-active MSD and PID control were analyzed and compared, and control parameters which afforded the best comprehensive performance for each control strategy were chosen. Simulation results indicate that compared with the passive air suspension truck, semi-active MSD control improves both ride comfort and road-friendliness markedly, with optimization ratios of RMS vertical acceleration and RMS tyre force ranging from 10.1% to 44.8%. However, semi-active PID control only reduces vertical vibration of the driver’s seat by 11.1%, 11.1% and 10.9% on A, B and C level roads respectively. Both strategies are robust to the variation of road level.

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"Rogue Flows brings together some of the best and most knowledgeable writers on consumption and cultural theory to chart the under-explored field of cultural flows and consumption across different regions in Asia, and the importance of these flows in creating contemporary Asian national identities. It offers innovative possibilities for envisioning how the transfer of popular and consumer culture (such as TV, music, film, advertising and commodities) across Asian countries has produced a new form of cross-cultural fertilisation within Asian societies, which does not merely copy Western counterparts." "Rogue Flows is unique in its investigation of how "Asianness" is being exploited by Asian transnational cultural industries and how it is involved in the new power relations of the region. It is an important contribution to the literature of Asian cultural studies."--BOOK JACKET.

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This paper outlines an innovative and feasible flight control scheme for a rotary-wing unmanned aerial system (RUAS) with guaranteed safety and reliable flight quality in a gusty environment. The proposed control methodology aims to increase gust-attenuation capability of a RUAS to ensure improved flight performance when strong gusts occur. Based on the design of an effective estimator, an altitude controller is firstly constructed to synchronously compensate for fluctuations of the main rotor thrust which might lead to crashes in a gusty environment. Afterwards, a nonlinear state feedback controller is proposed to stabilize horizontal positions of the RUAS with gust-attenuation property. Performance of the proposed control framework is evaluated using parameters of a Vario XLC helicopter and high-fidelity simulations show that the proposed controllers can effectively reduce side-effect of gusts and demonstrate performance improvement when compared with the proportional-integral-derivative (PID) controllers.

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This paper presents a nonlinear gust-attenuation controller based on constrained neural-network (NN) theory. The controller aims to achieve sufficient stability and handling quality for a fixed-wing unmanned aerial system (UAS) in a gusty environment when control inputs are subjected to constraints. Constraints in inputs emulate situations where aircraft actuators fail requiring the aircraft to be operated with fail-safe capability. The proposed controller enables gust-attenuation property and stabilizes the aircraft dynamics in a gusty environment. The proposed flight controller is obtained by solving the Hamilton-Jacobi-Isaacs (HJI) equations based on an policy iteration (PI) approach. Performance of the controller is evaluated using a high-fidelity six degree-of-freedom Shadow UAS model. Simulations show that our controller demonstrates great performance improvement in a gusty environment, especially in angle-of-attack (AOA), pitch and pitch rate. Comparative studies are conducted with the proportional-integral-derivative (PID) controllers, justifying the efficiency of our controller and verifying its suitability for integration into the design of flight control systems for forced landing of UASs.

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Due to economic and demographic changes highly educated women play an important role on the Chinese labour market. Gender has been shown to be an important characteristic that influences behaviour in economic experiments, as have, to a lesser degree, academic major, age and income. We provide a study looking at trust and reciprocity and their determinants in a labour market laboratory experiment. Our experimental data is based on two games, the Gift Exchange Game (GEG) and a variant of this game (the Wage Promising Game, WPG) where the employer's wage offer is non-binding and the employer can choose the wage freely after observing the workers effort. We and that women are less trusting and reciprocal than men in the GEG while this cannot be found in the WPG. Letting participants play the GEG and the WPG, allows us to disentangle reciprocal and risk attitudes. While in the employer role, it seems to be that risk attitude is the main factor, this is not confirmed analysing decisions in the worker role.

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Large infrastructure projects are a major responsibility of urban and regional governments, who usually lack expertise to fully specify the demanded projects. Contractors, typically experts on such projects due to experience with similar projects elsewhere, advise of the needed design in their bids. Producing the right design is nevertheless costly. We model such infrastructure projects taking into account their credence goods feature and the costly design effort they require and examine the performance of commonly used contracting methods. We show that when building costs are homogeneous and public information, multi-stage competitive bidding involving shortlisting of two contractors and contingent compensation of both contractors on design efforts outperforms sequential search and the traditional Design-and-Build approach. If building costs are private information of the contractors and are revealed to them after design cost is sunk, sequential search may be superior to the other two methods.

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This study aimed to identify new peptide antigens from Chlamydia (C.) trachomatis in a proof of concept approach which could be used to develop an epitope-based serological diagnostic for C. trachomatis related infertility in women. A bioinformatics analysis was conducted examining several immunodominant proteins from C. trachomatis to identify predicted immunoglobulin epitopes unique to C. trachomatis. A peptide array of these epitopes was screened against participant sera. The participants (all female) were categorized into the following cohorts based on their infection and gynecological history; acute (single treated infection with C. trachomatis), multiple (more than one C. trachomatis infection, all treated), sequelae (PID or tubal infertility with a history of C. trachomatis infection), and infertile (no history of C. trachomatis infection and no detected tubal damage). The bioinformatics strategy identified several promising epitopes. Participants who reacted positively in the peptide 11 ELISA were found to have an increased likelihood of being in the sequelae cohort compared to the infertile cohort with an odds ratio of 16.3 (95% c.i. 1.65 – 160), with 95% specificity and 46% sensitivity (0.19-0.74). The peptide 11 ELISA has the potential to be further developed as a screening tool for use during the early IVF work up and provides proof of concept that there may be further peptide antigens which could be identified using bioinformatics and screening approaches.

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The term 'penal populism' is now reflexively used by criminologists to describe what many see as a dominant trend within penal policymaking in many western countries. The epithet 'populist' is used with no Jess frequency by media and other public commentators to refer (always pejoratively) to this or that political announcement, policy or style of political leadership, whether the context be specifically related to crime or some other arena of public affairs. In most accounts 'penal populism' (or 'populist punitiveness': Bottoms, 1995) is treated as a composite term. The two words are inseparably coupled and it is the penal that receives most of the detailed attention. As in more general political commentary, populism is tacitly understood as a negative and rather dangerous phenomenon, suggestive of manipulation, shallow-ness and demagoguery: in short, a corruption of normal, healthy democratic politics. As against such accounts, I want to suggest that debate about penal policymaking and its future -and particularly the prospects for more progressive policymaking in the area -would be assisted if populism was taken more seriously both conceptually and politically. This requires a decoupling of the concept of populism from what is habitually taken to be its punitive partner and that which defines its content. Currently the term is used without clear definition, let alone conceptual elaboration, to reference political pathology. Instead populism should be examined as a regular, meaningful dimension of contemporary political practice that has to be understood and engaged, not just denounced and extirpated. That is, I am seeking to make a case for bringing populism in from the despised margins to the centre of political practice and reflection. I will also briefly consider some of the implications this may have for penal politics specifically.

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Democracy is a multi-dimensional concept, ranging from definitions based exclusively on institutional frameworks (for example, Held, 2005, Przeworski, Alvarez, Cheibub and Limongi, 2000) to complex and integrated measures that include political and civil rights, democratic practices, values and, finally, a diverse set of institutional arrangements in society, including welfare, education, industrial relations and the legal system (Inglehart and Welzel, 2005, Jaggers and Gurr, 1995, O'Donnell, Cullel and Iazetta, 2004). This reflects the range of and distinction between merely formal electoral democracy and genuinely 'effective liberal democracy' (Inglehart and Welzel, 2005: 149), where democracy is firmly embedded not only in its institutions but in the values of its citizenry. Evidence from cross-national research confirms that formal democratic institutions, different dimensions of effective democracy, and democratic values are indeed strongly linked (Inglehart and Welzel, 2005: 154, Jaggers and Gurr, 1995: 446). Democracy is more than just a set of institutions, rules and mechanisms: it is a set of core values engrained in the 'lived experience' of its citizens. Core values of democracies are individual autonomy and egalitarianism, tolerance of diversity, and freedom from oppression for both individuals and institutions. Democracies restrain their governments by the rule of law and grant its citizens equal access to and equal treatment by legal institutions. Among these institutions, criminal justice and the treatment of those who violated rules and regulations represent sensitive seismographs for the quality of effective democracies, and the ways how democracies realise their core values.