11,364 research outputs found
Quan guo er tong zuo wen bi sai te deng zuo pin
No full text全國兒童作文比賽評判會編.Cover title.Quan guo er tong zuo wen bi sai ping pan hui bian
Zhongguo guo shu bi sai da hui te kan. no.2
No full text著錄據: 創刊第2期(民國44年6月25日[June 25, 1955])Zhu lu ju: chuang kan di 2 qi (Minguo 44 nian 6 yue 25 ri [June 25, 1955]
OPTIMISING MACHINE LEARNING TECHNIQUES: AUTOFLEX - AN AUTOML APPROACH
No full textMasteroppgave(MSc) in Master of Science in Business Analytics, Handelshøyskolen BI, 2023Automated Machine Learning (AutoML) has emerged as a promising solution to tackle the challenges of algorithm selection, hyperparameter optimisation, feature engineering, scalability, and interpretability in ML tasks. This master thesis aims to profoundly investigate the state-of-the-art in AutoML and suggest revolutionary approaches to enhance its capabilities.
The research begins with a thorough review and evaluation of existing AutoML frameworks and techniques. Strengths, limitations, and applicability are scrutinised, providing valuable insights into their performance and usability across different problem domains. The evaluation includes comparisons of model performance, execution time, and interpretability, enhancing the understanding of the trade-offs involved.
Based on the findings, a novel approach, AutoFlex, is proposed to integrate established algorithms with automated pre-processing techniques. This approach leverages algorithms such as Random Forest Classifier, Gradient Boosting Regressor, and Decision Tree Classifier to ensure model interpretability. Additionally, pre-processing techniques like StandardScaler, RobustScaler, and OneHotEncoder are developed to enhance the quality of input data.
Extensive experiments are conducted on diverse datasets to evaluate the performance and interpretability of the proposed approach. Visualisations and analysis provide insights into the relationship between model performance, execution time, and interpretability, helping to interpret experimental findings.
The proposed approach, AutoFlex, combines interpretable algorithms with automated pre-processing techniques, which is crucial to developing more effective and usable AutoML systems. As AutoML continues to evolve, further research and advancements are necessary to address its limitations and maximise its potential for tackling complex ML tasks. We must continuously explore and innovate AutoML to ensure it remains a reliable and safe solution for various applications
Bi txitodun sai arrearen kabia Baztanen (Nafarroan)
No full textItxusiko Haitzak Baztanen (Nafarroan) daude, Artzamendi izeneko mendia eta Aritzakun errekaren artean. Hareharri eta konglomeratuzko harkaitz-labar hauek itsas-mailatik gora 300-600m bitarteko altura hartzen dute eta orientazio nagusia hegoaldekoa da. Itxusiko Haitzetako sai arre kolonia Nafarroako iparraldeko handienetakoa da. Kolonia hau oso aspalditik da ezaguna, 1893 ko liburu batean
(Folin, 1893) saiak ehizatzeko leku egoki bezala agertzen bait da. Geroztik ordea, eta ia mende batez, ezezagun bilakatu da zientzialarientzat, 1971 urtean berriro ere bertan saiak kumatzen direla baieztatu zen arte. Urte horretatik aurrera hurbileko jarraipena egin zaio Itxusiko sai-arre koloniari
CO2 Emissions and its effect on Economic Growth
No full textMasteroppgave(MSc) in Master of Science in Finance - Handelshøyskolen BI, 2023This thesis examines the economic impact of fossil fuel dependency, measured by CO2 emissions per capita, and analyzes it during different periods ranging from 1800 to 2018. We begin with a univariate model and add time lags to the model to create autoregressive models to investigate the impact over time. We use a Vector Autoregressive (VAR) model to analyze the relationship between CO2 emissions per capita and GDP per capita over time and include contemporary terms for further analysis. Our main goal is to determine whether CO2 emissions per capita drive GDP per capita or if the relationship is the opposite. Our analysis reveals a conditional cointegration between these two variables. We also investigate this relationship in the context of countries that participated in the Industrial Revolution and explore how it evolved after the implementation of climate change policies in 1970. Our findings indicate a robust association between CO2 emissions per capita and GDP per capita, with CO2 emissions per capita significantly Granger causing GDP per capita in consecutive years conditionally. To ensure the reliability of our results, we conduct additional robustness tests. Overall, this study sheds light on the intricate relationship between CO2 emissions per capita and economic growth per capita, providing insights into the potential consequences of fossil fuel dependency on national economies
Client-consultant interaction practices: Sources of ingenuity, value creation and strategizing
No full textService providers increasingly choose to interact with their clients. Previous studies show that client’s resources and activities can influence the service provider’s ability to create value, to be creative, and to develop competitive strategies. Yet several gaps can be identified in the literature regarding how these abilities are impacted by client-consultant interaction (c-c-i) practices. The purpose of this doctoral thesis is to explain the service providers’ varying ability to offer highly valuable solutions to their clients’ problems, in terms of the practices through which consultants interact with their clients. The main research questions are;
How do client-consultant interaction practices influence a firm’s ability to offer unique value propositions and deliver ingenious solutions, and how do these practices influence the formation of the firm’s strategy? These questions are answered through four papers. Each paper answers a sub-question.
Paper 1 focuses on the impact of c-c-i practices on the service providers’ ingenuity capabilities. The paper asks how project teams shatter constraints in ill-structured problem-solving situations, and what implications this finding has for the understanding of creative action in organizations. This paper sheds light on the c-c-i practices through which project teams shatter their constraints and create ingenious solutions.
Paper 2 focuses on the creative aspects of c-c-i practices and presents the experiences of service providers who have been successful in capitalizing on the creative resources provided by their clients.
Paper 3 is an inquiry into the relationship between c-c-i practices and the service providers’ ability to offer unique value propositions. The paper provides a model to define and assess value created through c-c-i practices. The findings of this paper show that value creation is maximized through c-c-i practices that provide access to various forms of capital and practice that enable capital exploitation. Unique value offerings can be developed from knowing what c-c-i practices to enact in different circumstances.
Paper 4 focuses on the implications of c-c-i practices for the emergence of new strategies. The findings show that mundane business operations can be the locus of strategizing, and that clients can play a role in emergent strategy formation. Theoretical resources for this research are drawn from literature on practice theory, strategy, organizational creativity, and value creation. An explorative research design is used and qualitative data are gathered from 30 cases through extensive field work. Both in-depth and comparative case analyses are performed
Effective email marketing: an empirical study of the impact of personalized communication on customer engagement and purchase decisions
No full textMasteroppgave(MSc) in Master of Science in Business, Marketing - Handelshøyskolen BI, 2019This study investigates the impact of behavior-based personalization on
customer engagement and purchase behavior in the context of email marketing. For
this purpose, the author reviews and combines the following research streams in the
literature: email marketing, personalization of marketing communication, and
customer engagement.
To answer the research question at hand, the author designs a field study in
collaboration with Kahoot! AS, a fast-growing Norwegian start-up company
operating in the education technology industry. Kahoot!’s game-based learning and
trivia platform is used in multiple settings – school and university classrooms,
business training and presentations, social, cultural, and other events (retrieved
from kahoot.com). By leveraging marketing automation technology, which
Kahoot! uses for the email campaigns’ creation and management, the author sets
up and runs the experiment. Findings of the study provide marketing managers with
useful insights on the effectiveness of behavior-based personalization in the email
marketing context as well as contribute to the ongoing academic discussion about
personalized marketing communication and customer engagement.
The results reveal that email communication has a significant positive effect
on customer engagement irrespective of behavior-based personalization. This
proves that email is an effective marketing communication channel, and it should,
therefore, remain a key part of the digital media mix used by marketers. However,
based on the lack of a significant difference in the effectiveness of personalized and
non-personalized email campaigns, the author recommends focusing more on highquality
generic content and the design of the email messages. Furthermore,
consistent with the viewpoints of researchers in the field, the study confirms that
customer engagement is a significant predictor of customer purchases, leading to
the conclusion that firms should invest in customer engagement marketing
initiatives to ultimately achieve better firm performance
Multiproject "hostile" environments
No full textBacheloroppgave i Prosjektledelse fra Handelshøyskolen BI, 2017This thesis addresses the problems and challenges of working in a multiproject
environment, and what could we do to improve it.
The thesis has been prepared in connection with the program BIK 6512 Project
Management 3, at BI Department of Management and Organization Oslo.
The author has been working as a project manager himself for the organization
described for the last 5 years. I’m a Spanish construction engineer who moved to
Norway 5 years ago with my whole family because of the Spanish economy crisis.
I have several years of experience as project manager in Spanish construction
industries, and now I'm leading offshore projects for a Norwegian O & G
engineering company (IKM dsc Engineering). I would like to remark that I’m
fluent in Norwegian and English, but I can express myself much better in English
even though is not my mother language. Please have this in mind when reading
the thesis, thanks!
This thesis has been basically prepared for my own learning, but I really hope it
can contribute to improve the way we face daily our work in a multiproject
environmen
Ordering of organic molecules on templated surfaces
No full textThis thesis describes the controlled growth of molecular nanostructures using modified metallic and semiconductor surfaces. The Ag/Si(lll)-(root3 x root3),the Sn/Cu(100) surface alloy system and the Bi/Si(100) nanolines and (2xn) surfaces were all investigated as suitable substrates for the controlled growth of pentacene, (C22H14) or trimesic acid, (C6H3(COOH)3) organic molecules. The following techniques were used in this study; Scanning Tunnelling Microscopy (STM), Low Energy Electron Diffraction (LEED), Normal Incident X-Ray Standing Waves (NIXSW) and Temperature Programmed Desorption (TPD).
The room temperature growth and ordering of trimesic acid on the AgfSi(ll1)-(root3 x root3) surface was investigated. An oblique unit cell was determined and a model proposed for the highly ordered close-packed domains.
The discovery of a new submonolayer phase on Sn/Cu(100) and the re-examined known phase are discussed. New models for these reconstructions are proposed. Adsorption of trimesic acid at room temperature on the clean substrate the lowest Sn coverage phase were studied. Two new Sn coverage dependent structures were discovered and bonding schemes in upright and flat orientations are discussed.
BifSi(100)-(2xn) surface was exploited as a template for the ordered growth of pentacene, which exhibited orientation specific adsorption. The Bi/Si(100)-(2xn) single domain surface created on vicinal silicon was used to test the suitable of Daresbury 4.2 beamline for NIXSW Imaging experiments and the quality of the results are discussed
Synthesis and Characterization of (1-x)(Na(0.5)Bi(0.5))TiO(3)-xAl(6)Bi(2)O(12) Solid Solution
No full textThe new lead-free (1-x)(Na(0.5)Bi(0.5))TiO(3)-xAl(6)Bi(2)O(12) compounds with x=0.01, 0.02, and 0.03 have been synthesized by conventional solid-state ceramic-fabrication technique. Systematic investigations on the dielectric, ferroelectric and piezoelectric properties of both poled and unpoled samples have been carried out. It was revealed that the dielectric and piezoelectric properties are improved by the addition of an appropriate amount of Al(6)Bi(2)O(12). Comparisons of these properties between poled and unpoled samples are presented. It is found that Curie temperatures and remnant polarization are increased after poling. The coercive field is, however, decreased after poling
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