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In this paper we discuss the problem of finding a suitable filter used as prefilter at digital Kalman filtering. The process is described by a stochastic state model. Two different filters are analyzed: a low-pass filter and a mean value filter. Especially we examine optimal choices of the parameters of the filters i.e. optimal integration area in the mean value filter and optimal time constant in
Temperature dynamics for a building heated by hot-water radiators are studied in this work. The emphasis has been put on deducting an equation for calculating radiator temperatures and temperature dynamics out of given datas on the construction of the heating system.
Different models for approximation of radiators are compared and the heating effect as a nonlinear function of the temperature
This report presents measuring and identifications of the process in papermachine PM4 Gruvöns Bruk, Grums.
Our intention was, except the measuring itself, to improve, if possible, the system model now used for process control with an IBM 1710 system.
The measurings were accomplished during the last two weeks of February 1969, and included six series of about 2000 samples each using a sam
In this work we have discussed some alternatives to digitize the signals from different measurement devices. As a result of the work we have got a prototype for a digital interface as well as systems for digital representation of signals in temperature and pressure systems.
The report is divided into two parts, temperature and pressure measurements.
In this section of temperature measurem
In this report multi-input systems are treated by considering the input vector consist of two elements, its magnitude which is a scalar, and a unit vector representing the direction of the control vector (i.e. the ratio between the control signals) in the linear space formed by the control vectors (III:1).
A formalism for representing multi-variable systems in matrix-form, where the magni
En social och ekologisk hållbar trafikplanering innebär inte enbart att utveckla hållbara färdmedel, utan även att optimera alla typer av färdmedel för att minimera dess miljöpåverkan. I dagens samhälle utvecklas ständigt nya åtgärder som främjar den hållbara trafikplaneringen. En nyutvecklad teknik, så kallad fordonsdata återfinns i ett urval nyare bilmärken, där RSI (Road Surface Information) är
Abstract har tillfälligt dolts av sekretesskäl.The abstract has been temporarily removed due to confidentiality reasons.
Syftet med uppsatsen var att utforska den levda erfarenheten av och reaktionerna på mikroaggressioner hos personer som identifierar sig som homosexuella, bisexuella, transpersoner, queera och andra minoritetsgrupper som bryter mot normer som rör kön, sexualitet eller relationer (hbtq+-personer). Mikroaggressioner är en subtil och ofta omedveten form av diskriminering som förmedlar nedsättande buds
Clusters, agglomerations of companies in related industries, are a phenomenon which have been widely accepted to increase the productivity of its constituent companies. Many scholars hold the view that companies should utilise these favourable conditions and interact with clusters. Nevertheless, there exists limited literature on the topic how companies can interact with clusters outside of their
Plastic waste has brought a severe pollution problem that demands immediate attention. Promoted by policymakers, academia, and corporations alike, the circular economy model presents a viable path to sustainable development. Likewise, the emergence of disruptive technologies promises a profound and imminent socio-technical transformation. This thesis qualitatively explores the role, barriers, an
This work reports the research and findings concerning the processes of groundwater flow and distribution to lake Bolmen in the Småland region, Sweden. The watershed of Bolmen is of high interest since it provides water for drinking and energy purposes, representing a resource of notable importance for the society of southern Sweden. Among the main objectives there is the estimation of the water b
Under 2017 återaktiverades totalförsvarsplikten för alla svenska medborgare. Situationen startade igång diskussioner kring jämställdhetsintegrering eftersom Sverige porträtterar sig själva som en modern, jämställd, nation. Utöver detta är Sverige en medlemsstat av Förenta Nationerna (FN) och måste förhålla sig till FN:s säkerhetsrådsresolutioner. Därmed behöver staten nationellt implementera ResolDuring 2017 the conscription for all Swedish citizens was reactivated. This situation triggered discussions surrounding gender mainstreaming since Sweden portrays itself as a modern, equal, nation. In addition, Sweden is a member state of the United Nations and has to adapt to their Security Council resolutions. Therefore the Resolution 1325 on women, peace, and security (2000) also has to be impl
Little is known about the labor market impacts of climate policies in emerging economies. This paper therefore analyzes the labor market impacts of eight regional Emission Trading Scheme (ETS) pilots that were implemented in different parts of China between 2013 to 2016. Applying a difference-in-differences strategy, results indicate that the policy hurt jobs by reducing working hours and employme
With the rise of international fractionalization of production, global value chain (GVC) integration has become an important pillar of economic growth strategies, especially in low- and middle-income countries during the past decades. Differentiating between backward and forward GVC integration, economic growth and upgrading potentials are well-defined, but to be sustainable growth through GVC int
Through ten semi-structured interviews, with people identified as women and air pressure stimulator users, this study examines lived experiences of using air pressure stimulators. The stimulators serve as a prism to explore the gendered relationship between human, technology and sexual pleasure. Judith Butler’s (2007) heterosexual matrix, Gayle Rubin’s (1998 [1984]) sex hierarchy and Donna Haraway
In January 2017, amidst the ongoing social strife in Venezuela, the Peruvian government enacted a working permit “Permiso Temporal de Permanencia” endowing Venezuelan migrants with the right to work and with access to health and education services. Given the spatial concentration of Venezuelan migrants in Peru and the clear temporal cut I unfold a difference-in-differences methodology to exploit t
Following the increasing sustainability trend and awareness, investors now look beyond only financial considerations when purchasing stocks. This paper analyzes the relationship between Environmental, Social, Governance (ESG) scores and stock performance, measured by returns. It investigates if splitting the sample period would result in a different magnitude of abnormal returns. This study furthe
The aim of this essay is to examine the phrasing of gender equality in the 2030 Agenda for Sustainable Development focusing on Goal 5: Gender Equality. The focus of the study also extends to analyze the potential consequences of the goal’s phrasing and understand why the empowerment of women and girls are seen as essential for the progression on all levels of sustainability. Through qualitative in
