112 research outputs found
CONSTRUCTION OF TEST PLATFORM FOR EXPERIMENTAL DESIGN OF PID CONTROLLERS WITH MATLAB
No full textDiplomsko delo temelji na izvedbi procesnega simulatorja v programskem paketu Matlab, ki bi nadomestil realni objekt do 3. reda, povezan s krmilnikom PLC preko AD/DA kartice. Vključen je teoretični del načrtovanja PID regulatorjev po eksperimentalni metodi Ziegler-Nichols, predstavljen je realni objekt, katerega želimo nadomestiti s simulacijo ter opisana vsa strojna in programska oprema, ki je bila uporabljena za uspešno realizacijo. V nadaljevanju je podrobno opisan proces izveden v Matlab/Simulink-u, ter izdelava uporabniškega grafičnega vmesnika GUI. Na koncu je prikazano testiranje simulacijskega modela in primerjava z realnim objektom, s primerom izdelave PID regulatorja v PLC-ju Omron CJ1G, ki je preko NI USB 6008 AD/DA kartice povezan z Matlab-om.Diploma work is based on the implementation of process simulator realized by Matlab software package, which would replace the real process up to 3rd order dynamics, implemented in PLC controller and connected with PC by AD/DA card. Theoretical part of the diploma involves experimental procedures of PID parameter design by Ziegler-Nichols recommendations on the real object, which can be replaced by adequate simulation model. Also all the hardware and software used for the successful realization of the diploma work are described. In the following chapters, a detailed process structure, modeling and development of graphical user interface (GUI) are carried out in Matlab/ Simulink. At the end, test and comparisons between the model and a real process outputs are presented, along with the configuration of PID controller in the PLC (Omron CJ1G), and NI USB 6008 AD/DA card connected to Matlab
R&D and Economic Growth in Slovenia: A Dynamic General Equilibrium Approach with Endogenous Growth
No full textIn the article, we model R&D as a major endogenous growth element in a small open economy general equilibrium framework and consider several R&D policy scenarios for Slovenia. Increase of the share of sectoral investment in R&D that is deductible from the corporate income tax and increase of government spending on R&D turned out to be the most effective suggested policy measures. While the former policy measure is still followed in part by an undesired transfer of the tax relief to dividends, a moderate increase of government spending on R&D boosts long-run productivity in the economy, thus increasing the future value of firms, which is reflected in a desired dividend increase. The households that would gain more utility from such policy scenarios are those with more skilled and highly skilled labour, but not the very top earners in the economy.Endogenous growth, General equilibrium modelling, R&D, Slovenia
Distance to the Efficiency Frontier and FDI Spillovers
No full textWe establish that domestically owned firms in two alternative models of emerging market economies, the Czech Republic and Russia, have not been converging to the technological frontier set by foreign owned firms. In both countries, the distance of domestic firms to the frontier grew (in all parts of the distribution) from 1992-1994 to 1995-1997 and did not change from 1995-1997 to 1998-2000. However, the distance to the frontier is orders of magnitude greater in Russia than in the Czech Republic throughout 1992-2000. We also find in both countries that domestic firms in industries with a greater share of foreign firms are falling behind more than domestic firms in industries with a smaller foreign presence. However, in the Czech Republic this “negative spillover” effect is diminished over time, whereas in Russia it continues to cause domestic firms to fall further behind. On the other hand, we find in both countries that foreign firms experience positive spillovers from other foreign firms operating in the same product market. This evidence on the dynamics of efficiency is consistent with the view that economies (firms) need to be more technologically advanced and open to competition in order to be able to gain from foreign presence.foreign direct investment, productivity, convergence, frontier, knowledge spillovers, Czech Republic, Russia.
Recovery and Growth in the Manufacturing Sectors of CEE Transition Economies: Short and Long-Term Efficiency Improving Factors
No full textThe first aim of the paper was to explain a cross-sector differences in evolution of gross product of Slovenian manufacturing sectors in the period 1992-98 using different short and long-term factors. Results pointed out great importance of initial conditions (sector orientation to convertible or non-convertible markets, and distorted production structure), as well as structural reforms and macroeconomic and institutional environment. Added long-term factors revealed positive association with short term output growth during the transition period – it is obvious that these factors (FDI, exports, imports of inputs, cooperation) create channels for the transfer of technology, improving the efficiency of production. It turned out also that quality improving exports to the EU countries is significantly positively correlated with the sector output performance. The paper further studies the importance of both direct and indirect means of technology transfer for transition countries and its impact on productivity growth of local firms. Using firm-level data for eight transition countries for the period 1994 - 1998 and employing growth accounting approach, the paper explores the importance of FDI, intra-industry knowledge spillovers from FDI, firm's own R&D accumulation and of international R&D spillovers through trade for firm's TFP growth. Time-invariant firmspecific effects are taken into account using panel data techniques, and potential selection bias for foreign investment decisions is corrected by using a generalized Heckman two-step procedure. After controlling for common economic policy influences and industry effects, our results confirm for five advanced transition countries that technology is being transferred to domestic firms primarily through direct foreign linkages. Evidence on some international R&D spillovers through arm-length trade has been found for four transition countries. Our results also suggest that FDI do not generate positive intra-industry spillovers for domestic firms. Moreover, for three transition countries FDI were found to have significant crowding-out effects for local firms in the same industry.
Osnutek Ustave kneževine Slovenije (Za dosje »Stanko Majcen« - vmesno poročilo)
No full textIn the first part of the article its author comments on historical and personal circumstances of the origin of the constitutional draft within »Slovenska zaveza«, an association of Slovene civic parties in the period of the Italian occupation in May, 1943. Especially stressed is the role of high-ranking civil servant, lawyer and writer Stanko Majcen, The second part contains the complete text of the constitutional draft with notes, discovered by the author in the Republic of Slovenia Ministry of the Interior archives in 1996.Prispevek je dvodelen: v prvi polovici komentiram zgodovinske in personalne okoliščine nastanka ustavnega osnutka v okviru "Slovenske zaveze", združenja slovenskih meščanskih strank v času italijanske okupacije maja leta 1943, s posebnim ozirom na delež visokega upravnega uradnika, pravnika in pisatelja dr. Stanka Majcna. V drugem delu navajam celotno besedilo osnutka ustave s pripombami, kakor sem ga leta 1996 odkril v arhivu Ministrstva za notranje zadeve republike Slovenije
The Steiner inellipse of a triangle
No full textV diplomskem delu je predstavljena elipsa, včrtana trikotniku. Osredotočimo se na Steinerjevo elipso, ki je včrtana v trikotnik in se dotika vseh stranic trikotnika v njihovih razpoloviščih. Oglišča trikotnika naj ležijo v kompleksni ravnini in so ničle polinoma. Ničli odvoda tega polinoma sta potem gorišči Steinerjeve trikotniku včrtane elipse. Elipsa ima središče v težišču trikotnika. Premica, ki se najbolj približa ogliščem trikotnika, poteka skozi gorišči trikotniku včrtane elipse in jo imenujemo premica najboljšega prileganja.
Diplomsko delo je zapisano v šestih poglavjih. V prvem poglavju je predstavljen Mardenov izrek, ki ga lahko dokažemo šele v kombinaciji z Bôcherjevim delom dokaza. V drugem poglavju smo se osredotočili na Mardenov in Bôcherjev dokaz, ter kombinacijo teh dveh podkrepili s primeri. Mardenov izrek velja za polinome tretje stopnje s kompleksnimi koeficientite povezave med ničlami kubičnega polinoma in ničlami njegovega odvoda so opisane v naslednjem, tretjem poglavju. V tem delu je vpeljan tudi Steinerjev izrek, po katerem se imenuje elipsa, včrtana trikotniku. Steinerjev izrek uporabimo pri afini in linearni transformacijiobe preslikavi sta predstavljeni v četrtem poglavju, v petem poglavju pa smo dokazali Steinerjev izrek in opisali Steinerjevo včrtano elipso. Diplomsko delo smo zaključili z zadnjim, šestim poglavjem, kjer smo se posvetili dokazovanju izreka iz tretjega poglavja.
Skozi celotno diplomsko delo sem si pomagala s programom GeoGebra, s pomočjo katerega sem narisala vse priložene slike.In our thesis we present the ellipse inscribed within triangle. We have focused on the Steiner\u27s ellipse which is inscribed within triangle and it touches all the sides of a triangle in their midpoints. Vertices of the triangle are placed in the complex plane and they are the zeros of a polynomial. Zeros of the derivative of this polynomial are the focal points of the Steiner\u27s ellipse inscribed into the triangle. The center of this ellipse is at the center of gravity of the original triangle. The line that passes closest to all corners of the given triangle, contains the focal points of the ellipse inscribed within this triangle and is called the best-fit straight line.
The thesis is divide into six chapters. In the first chapter Marden\u27s theorem (that can be proved only in combination with the Bôcher\u27s part of the proof) is presented. In second chapter we focus on Marden\u27s and Bôcher\u27s parts of the complete proof and we support the combination of these two proofs with some examples. Marden\u27s theorem applies to third-degree polynomials with complex coefficientsconnections between the zeros of cubic polynomial and zeros of its derivative are investigated in the following, third chapter. In this chapter we then introduce the Steiner\u27s theorem, due to whose author the ellipse inscribed within the triangle is also named. We use the Steiner\u27s theorem in affine and linear transformations, both investigated in the fourth chapter. In the fifth chapter we have proved Steiner\u27s theorem and studied Steiner\u27s inscribed ellipse in details. We are completing our thesis with the last, sixth chapter, where we focus on the proof of main theorem from the third chapter.
Through the thesis we have used the program GeoGebra, which helped us at the preparation of all included illustrations
The Effects of Foreign Trade Liberalization and Financial Flows between Slovenia and the EU after the Accession
No full textThe new version of the CGE model of the Slovenian economy, based on the 1998 SAM, was used for simulations of the consequences of further foreign trade liberalization after 1998 as the outcome of the finished processes of implementation of Free Trade Agreements and the European Agreement, adaptation of the Customs Tariff to the EU Common External Tariff for the manufacturing products, adoption of the EU Common External Tariff after the accession of Slovenia to the EU as well as the estimated transfers between both budgets. Results obtained show a positive net outcome of the Slovenian accession to the EU in the long run. On the other hand, rational behaviour of the government will certainly moderate possible short run negative effects and improve favourable long run effects.Computable General Equilibrium Model, EU-Accession, Financial Flows, Trade Liberalization, Transition Country, Regionalism
Predicting energy consumption and savings in the housing stock: A performance gap analysis in the Netherlands
No full textResidential buildings are one of the key target sectors for energy and CO2 reduction. Research on the relationship between policy instruments and their effects is crucial for the continuous improvement of these tools. This thesis focuses on The Energy Performance of Buildings Directive (EPBD) as an EU flagship policy for technical improvements of the existing dwelling stock. At the core of the directive, an energy certificate is prescribed for all existing dwellings and is required to be present at moments of sale or rent. The certificate includes a theoretical consumption of each individual dwelling. However, theoretical models do not always correspond to reality with the desired accuracy. This large scale study explores the relation between the consumption assumed by the label certificate and the real consumption of the dwellings. It demonstrates that low performing dwellings have a theoretical consumption roughly two times the actual, while well performing dwellings consume one third less. These discrepancies are shown to have adverse effects on policy targets. Therefore, the thesis quantifies the causes of the discrepancies, looking into dwelling and household, as well as behavioural factors. There is a clear need for a more precise estimation of heating consumption on a broader, dwelling stock level in order to enhance the effectiveness of the current renovation policies. The thesis showed that using the current knowledge along with the growing amount of available data, there is enough motivation to reduce the performance gap by improving the predictions of actual dwelling consumption.OTB Research for the Built EnvironmentArchitecture and The Built Environmen
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