A closed-loop maintenance strategy for offshore wind farms: Incorporating dynamic wind farm states and uncertainty-awareness in decision-making

The determination of maintenance strategies is subject to complexity and uncertainty arising from variable offshore wind farm states and inaccuracies in model parameters. The most common method in the existing studies is to adopt an open-loop approach to optimize a maintenance strategy. However, this approach lacks the ability to capture...

Livelihood Capital Effects on Famers’ Strategy Choices in Flood-Prone Areas: A Study in Rural China

The global climate change has resulted in huge flood damages, which seriously hinders the sustainable development of rural economy and society and causes famers’ livelihood problems. In flood-prone areas, it is imperative to actively study short and long-term strategies and solve farmers’ livelihood problems accordingly. Following the...

A multi-objective maintenance strategy optimization framework for offshore wind farms considering uncertainty

While offshore wind energy is showing enormous potential, effective approaches to enhance its economics are being sought at the same time. The design of maintenance strategy is a type of strategic decision-making for offshore wind farms, aiming to improve energy production and reduce maintenance expenses. As a complicated and challenging task...

Autogenous shrinkage of alkali-activated slag and fly ash materials: From mechanism to mitigating strategies

Alkali-activated materials (AAMs), as eco-friendly alternatives to Ordinary Portland cement (OPC), have attracted increasing attention of researchers in the past decades. Unlike cement, which requires calcination of limestone, AAMs can be made from industrial by-products, or even wastes, with the use of alkali-activator. The production of AAMs...

SGD_Tucker: A Novel Stochastic Optimization Strategy for Parallel Sparse Tucker Decomposition

Sparse Tucker Decomposition (STD) algorithms learn a core tensor and a group of factor matrices to obtain an optimal low-rank representation feature for the High-Order, High-Dimension, and Sparse Tensor (HOHDST). However, existing STD algorithms face the problem of intermediate variables explosion which results from the fact that the...

Multiple Strategies Differential Privacy on Sparse Tensor Factorization for Network Traffic Analysis in 5G

Due to high capacity and fast transmission speed, 5G plays a key role in modern electronic infrastructure. Meanwhile, sparse tensor factorization (STF) is a useful tool for dimension reduction to analyze high-order, high-dimension, and sparse tensor (HOHDST) data, which is transmitted on 5G Internet-of-things (IoT). Hence, HOHDST data relies...

Influence of uncertainty on performance of opportunistic maintenance strategy for offshore wind farms

The increasing capacity of offshore wind energy around the world brings challenges in Operation and Maintenance (O&M) management. Over the past years, many studies have focused on developing sound maintenance strategies in order to minimize maintenance cost or maximize availability. One of the promising maintenance strategies is...

Renovated Livability in Pecinan: A Living Complex in Pecinan, for Future Young Occupants and Visitors, by Vernacular Heritage Settlement Architectural Design

With the interest of redesigning non-monumental heritage groups, the Architects worked on the district called Pecinan (the Chinese-Javanese quarter) in Semarang, Indonesia. The site problems require to improve district livability, to renovate cultural variety, and to enrich the old town's heritage quality. The research highly considered with...

Numerical analysis of the effect of the scan strategy on the residual stress in the multi-laser selective laser melting

The inevitably formed residual stress in the Selective Laser Melting (SLM) process leads to distortion, crack and even delamination of the workpiece. Single laser is commonly applied during SLM processing. However, its productivity is much lower than multiple lasers. In addition, the research of residual stress with multi-laser condition...

State-of-the-Art Research on Motion Control of Maritime Autonomous Surface Ships

At present, with the development of waterborne transport vehicles, research on ship faces a new round of challenges in terms of intelligence and autonomy. The concept of maritime autonomous surface ships (MASS) has been put forward by the International Maritime Organization in 2017, in which MASS become the new focus of the waterborne...

Load-sensing Based Integrated Chassis Control: Using hierarchical strategy and control allocation

Evolution of new technologies, market preferences and vehicle safety standards and regulations motivate the automotive industry to contribute to higher quality mobility and safer transportation for the society. With the compelling development of electronics over the past few decades, passenger cars are equipped with an increasing number of...

Decision-making criteria for the acquisition of retail properties: “Do physical and non-physical features of retail properties affect the building’s financial performance?”

The subject of this thesis is the influence of physical and non-physical building features on the financial performance of retail real estate. The main question throughout this thesis is whether building features affect the net rental income and could be decisive for the acquisition of retail real estate by institutional real estate investors....

Designing for crowd well-being: Current designs, strategies and future design suggestions

This paper introduces the concept of crowd well-being and the needs for sustaining it. Crowd well-being can be interpreted as crowd members’ evaluations on their emotional reactions, moods and judgments they form about their satisfactions, goals or needs fulfillment in a crowded situation according to the definition of subjective well-being by...

Strengthening the Position of PostNL Parcels

PostNL Parcels (PNP) is the market leader in the Dutch domestic parcels market. This booming market is growing with almost 11% per year in revenue. PNP can keep up with this trend due to shipment volumes provided by its larger business senders belonging to the Key Account Managers. However, with the middle and smaller business senders PNP is...

Optimization: Traffic Control Using Route Information

Optimizing traffic control for a multiple-junction road network is a difficult but important task in traffic system design. A properly designed control strategy with various control measures is effective in handling traffic flows in diverse traffic conditions. Regarding the limits and low performance of existing control system, this paper...

Effect of Spatial Variability on Maintenance and Repair Decisions for Concrete Structures

Due to the increasingly number of elder and deteriorating structures, maintenance is becoming a serious and more complex problem in most of the countries. A lot of studies have been carried out in this area for years. However, the fact that a lot of parameters show spatial random variability, which is linked with dependencies on temperature, w/c...