Sökning: "PENG"

Visar resultat 1 - 5 av 113 uppsatser innehållade ordet PENG.

  1. 1. An Evaluation Study of Leak Testing Technologies for Watertight Plate Heat Exchangers : Fast and sustainable leak testing technology for high energy efficiency products

    Uppsats för yrkesexamina på avancerad nivå, Blekinge Tekniska Högskola/Institutionen för matematik och naturvetenskap

    Författare :Fritjof Nilsson; Yanjun Peng; [2023]
    Nyckelord :Leak rate; Optimization; Pressure Decay; Vacuum Technology; Volume; Läckhastighet; Optimering; Tryckfall; Vakuum Teknologi; Volym;

    Sammanfattning : Background: One part of manufacturing a Plate Heat Exchanger (PHE) is to leak test them before delivery. Today, helium is used extensively in leak testing. How-ever, it is unsustainable to use helium in leak testing, because of its non-renewability and therefore becoming more and more expensive. Also, this technology is relatively complex. LÄS MER

  3. 2. How owners and managers of start-ups deal with the potential trade-offs between sustainability, growth, and profitability in the early stages

    Magister-uppsats, Uppsala universitet/Företagsekonomiska institutionen

    Författare :Lei Peng; Thiago Lucena; [2023]
    Nyckelord :sustainability; profitability; growth; start-ups; trade-offs;

    Sammanfattning : Sustainability has become a major concern for society, adding pressure on companies to become more sustainability-driven, while at the same time attending to the questions of economic growth and financial performance. Although the existing literature has provided frameworks that highlight the need for balancing environmental, social, and economic impact, there is still limited knowledge about how company representatives perceive and deal with the implicit trade-offs. LÄS MER

  4. 3. Modeling of Energy Consumptionin Milling Process to Assess their Environmental Impact

    Master-uppsats, KTH/Produktionsutveckling

    Författare :Vasanth Kumaran Ashok Kumar; Peng Liang; [2023]
    Nyckelord :Milling process; Energy consumption; Mechanistic model; Environmental impact; Life cycle assessment; Fräsningsprocess; Energiförbrukning; Mekanisk modell; Miljöpåverkan; Livscykelbedömning;

    Sammanfattning : This thesis presents a method for modeling energy consumption in the milling process to assess their environmental impact, using a simple experimental approach. The factors influencing the environmental impact in milling processes are analyzed with life cycle assessment principles, and their climate change impact is calculated with examples of dry milling experiments. LÄS MER

  5. 4. Calculating Value-at-Risk under the G-Normal distribution. : Applied with Swedish data.

    Kandidat-uppsats, Uppsala universitet/Nationalekonomiska institutionen

    Författare :Daniel Renvall Moberg; [2023]
    Nyckelord :;

    Sammanfattning : Value–at–Risk (VaR) since its birth at JPMorgan in the 1990s, has become widely adopted by first and foremost the financial industry, but in later days regulatory authorities as a way of calculating downside risk. The subject in hand has led to numerous attempts by both the industry as well as scholars to find the perfect settings to calculate VaR. LÄS MER

  7. 5. Statistical Analysis on Aerodynamics of Passenger Vehicles

    Master-uppsats, Uppsala universitet/Sannolikhetsteori och kombinatorik

    Författare :Dingkang Peng; [2023]
    Nyckelord :statistics; aerodynamics; automotive engineering; causality; time series; cluster analysis;

    Sammanfattning : This thesis aims to use statistical methods to analyze wind tunnel data generated in automotive aerodynamics testing to understand the properties of aerodynamic force and pressure in a vehicle's working environment. The data used for analysis are visualized, clustered and finally analyzed for Granger causality to see whether a causal link exists between different variables. LÄS MER