Search results for "valmistus"

On static instability and estimates for critical velocities of axially moving orthotropic plates under inhomogeneous tension

2012

In this study, models for axially moving orthotropic plates are investigated analytically. Linearised Kirchhoff plate theory is used, and the energy forms of steady-state models are considered. With the help of the energy forms,ho- mogeneous and inhomogeneous tension profiles, some limits for the critical web velocity are found analytically. A numerical example is given about effects of the shear moduls in the case of an inhomogenous tenstion profile. nonPeerReviewed

Added-Mass Based Efficient Fluid–Structure Interaction Model for Dynamics of Axially Moving Panels with Thermal Expansion

2020

The paper considers the analysis of a traveling panel, submerged in axially flowing fluid. In order to accurately model the dynamics and stability of a lightweight moving material, the interaction between the material and the surrounding air must be taken into account. The lightweight material leads to the inertial contribution of the surrounding air to the acceleration of the panel becoming significant. This formulation is novel and the case complements our previous studies on the field. The approach described in this paper allows for an efficient semi-analytical solution, where the reaction pressure of the fluid flow is analytically represented by an added-mass model in terms of the panel…

Effects of heating, drying and straining on the relaxation and tensile properties of wet paper

2014

Biocides in papermaking chemistry

2011

Analysis of malodorous nitrogen-containing compounds in paper and board products

2007

Rainanmuodostuksen suotautumismekanismit

2007

Development of fast analysis methods for extractives in papermaking process waters

2011

A fast analysis method with an online sample enrichment technique for the analysis of resin and fatty acids present in papermaking process waters was developed. This method was based on atmospheric pressure chemical ionization (APCI) and mass spectrometry (MS) for the detection of [M-H]- ions of compounds of interest. The method was applied to the control of the most prevalent resin (dehydroabietic and abietic) and fatty (palmitic, stearic, oleic, and linolenic) acid levels in papermaking process waters. Continuous data on these acids are of practical importance when predicting possible deposit-derived problems in the paper machine. The first part of the study was focused on the development…

Toward Quaternary QCA : Novel Majority and XOR Fuzzy Gates

2022

As an emerging nanotechnology, quantum-dot cellular automata (QCA) has been considered an alternative to CMOS technology that suffers from problems such as leakage current. Moreover, QCA is suitable for multi-valued logic due to the simplicity of implementing fuzzy logic in a way much easier than CMOS technology. In this paper, a quaternary cell is proposed with two isolated layers because of requiring three particles to design this quaternary cell. Moreover, due to the instability of the basic gates, the three particles cannot be placed in one layer. The first layer of the proposed two-layer cell includes a ternary cell and the second one includes a binary cell. It is assumed that the over…

Causality-Aware Convolutional Neural Networks for Advanced Image Classification and Generation

2023

Smart manufacturing uses emerging deep learning models, and particularly Convolutional Neural Networks (CNNs) and Generative Adversarial Networks (GANs), for different industrial diagnostics tasks, e.g., classification, detection, recognition, prediction, synthetic data generation, security, etc., on the basis of image data. In spite of being efficient for these objectives, the majority of current deep learning models lack interpretability and explainability. They can discover features hidden within input data together with their mutual co-occurrence. However, they are weak at discovering and making explicit hidden causalities between the features, which could be the reason behind the parti…

Tärkkelys ja tärkkelysteollisuus

2016

Tässä tutkielmassa tarkasteltiin neljää eniten teollisesti valmistettavaa tärkkelystä (kasveista maissi, kassava, vehnä ja peruna) sekä tärkkelyksien valmistamiseen käytettäviä teknologioita, tuotantomääriä, käyttöä ja maailman markkinoita. Lisäksi tutkielmassa tutustuttiin tärkkelyksen kemialliseen ja fysikaaliseen rakenteeseen sekä ominaisuuksiin. Tärkkelyksen fysikaaliseen rakenteeseen liittyen selviteltiin yksityiskohtaisesti tärkkelyksen synteesi, tärkkelysjyväsen koko ja muoto sekä rakenne. Tutkielmassa esiteltiin tärkkelyksen yleisimmät valmistusteknologiat. Tällöin läpikäytiin maissitärkkelyksen valmistuksen liuotukseen ja märkäjauhatukseen liittyvät menetelmät, vehnätärkkelyksen va…