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Renewable energy sources are important alternatives that should be considered in forming energy portfolio of countries.
Thus to manage the market risk and achieve better investment returns of renewable energy stocks in China is of great value for policy makers and investors.
Result of this paper indicated that; First Solar Inc., General Cable Corporation and Trina Solar are more important within the network, moreover; we found that; these stocks play a significant role in renewable energy development in terms of market capitals.
These observations are interesting given the recent emergence of new investors in the renewable energy sector.
This paper provides an alternative but very effective strategy other than Markowitz method for the portfolio allocation of renewable energy stocks in China.
Our review suggests that feed-in tariff and renewable portfolio standard can effectively increase the share of renewable energy power and lead to renewable resource diversity.

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What are the current challenges in energy management in microgrids with distributed generation (DGs)?
4 answers
Current challenges in energy management in microgrids with distributed generation (DGs) include addressing uncertainties in modeling renewable-based DGs and battery storage, selecting appropriate models for accurate planning and operation. Furthermore, the shift towards decentralized energy management methods raises concerns about privacy and scalability, necessitating solutions to promote trusted collaboration and prevent collusion. Incorporating artificial intelligence (AI) in energy management systems (EMS) can enhance performance efficiency and reliability, but challenges like data privacy, security, scalability, and explainability need to be overcome. Additionally, ensuring robustness and energy efficiency in grid integration, selecting suitable EMS, and managing renewable resources and storage systems pose significant challenges in maintaining stability and security of microgrids.
What are the current economic challenges faced by Yemen in 2015?
5 answers
In 2015, Yemen faced a multitude of economic challenges that significantly impacted its development. The ongoing conflict in Yemen since early 2015 has hindered the country's economic growth, affecting various sectors such as seaports, energy, and small and medium enterprises (SMEs). The conflict has led to inadequate infrastructure, insufficient financial resources, energy crises, lack of access to electricity, and difficulties in securing raw materials for SMEs. Additionally, the war has exacerbated the challenges faced by SMEs, including corruption, poor infrastructure, and the absence of a specific SME authority. These challenges have collectively impeded Yemen's economic progress and the ability of businesses to contribute effectively to the country's development.
Impact of Artificial Neural Networks in the Prediction of Stock Market Indices using Forecasting Algorithms (Nigeria Perspective)?
5 answers
Artificial Neural Networks (ANNs) play a crucial role in predicting stock market indices, particularly in the Nigerian perspective. By leveraging ANN indicators, investors can consistently earn good returns in the Nigerian stock market. Additionally, AI techniques like machine learning algorithms, including ANNs, can help forecast changes in the stock market by analyzing data from various sources. The integration of recurrent neural networks (RNNs) and long short-term memory (LSTM) models further enhances investment decision-making by identifying temporal relationships and patterns in stock market data. Overall, utilizing ANN and other AI techniques in forecasting algorithms provides a robust approach to understanding and predicting stock market trends, especially in the dynamic and noisy environment of the Nigerian stock market.
How much power does heat addition cost in industrial processes?
4 answers
The cost of heat addition in industrial processes varies depending on the specific heat supply system utilized. Different studies have compared the thermodynamic and economic efficiencies of various heat supply processes. For instance, high-temperature heat pump systems have been found to have higher exergetic efficiency compared to gas turbine or gas and steam turbine combined cycle processes. Electrifying heat supply through industrial heat pumps can lead to significant energy and CO2 savings, but may incur additional costs ranging between 5 and 18 $/GJ in different industrial sectors. Additionally, utilizing renewable energy sources like solar-photovoltaic and wind turbines for high-temperature industrial process heat can result in levelized costs ranging from USD 10/GJ to USD 31/GJ, depending on the renewable energy share and storage system used. Integrating waste heat recovery systems, such as supercritical CO2 cycles, can also provide cost-effective solutions for generating electricity from industrial waste heat.
What is the most cost-efficient heat source in industrial processes?
5 answers
The most cost-efficient heat source in industrial processes can vary depending on factors such as technology, energy prices, and efficiency. Research comparing different heat supply processes highlights that high-temperature heat pumps (HTHP) can offer significant cost advantages. These HTHP systems, when operating with a coefficient of performance (COP) of four and under specific energy price conditions, have been shown to be the most economical option for heat production. Additionally, the study emphasizes that the economic feasibility of solar process heat technologies, such as solar thermal (ST) and photovoltaic (PV) systems, is influenced by factors like solar resource availability and investment costs. While ST energy has traditionally been favored due to its efficiency, the evolving costs and efficiencies suggest that PV solar energy could become a competitive alternative in certain scenarios.
What is link between site selection of pv with pv installation?
5 answers
The site selection process for Photovoltaic (PV) installations plays a crucial role in determining the optimal areas for PV installation. Various factors such as solar energy potential, distance to transmission lines, surface slope, sunshine duration, and temperature ratio are considered in the decision-making process for PV site selection. Evaluating site selection for PV plants involves integrating geographic information system (GIS) and building information model (BIM) techniques to identify suitable regions based on location, solar power output, and surface conditions. Analytical Hierarchical Process (AHP) and Genetic Algorithms (GAs) are utilized to prioritize criteria and determine optimum locations for PV installations, considering visual disturbance, spatial constraints, and environmental factors. Ultimately, the site selection process directly impacts the efficiency and effectiveness of PV system installation, ensuring the best utilization of renewable energy sources.
Do process innovations have a bigger impact than service or product innovations in healthcare?
5 answers
Process innovations in healthcare play a crucial role alongside service and product innovations. Service innovations in healthcare focus on patient value and quality of care, while product innovations enhance life expectancy and quality of life. Process innovations, often overlooked compared to product innovations, are linked to firm performance in the pharmaceutical industry, with a positive association found between manufacturing process innovation and economic performance. In healthcare, process innovations can lead to higher effectiveness in healthcare processes and provide increased options for healthcare delivery. Therefore, while service and product innovations directly impact patient care and outcomes, process innovations are equally essential for enhancing efficiency, improving healthcare delivery, and ultimately contributing to the overall success and quality of healthcare services.
Why do process innovations have a bigger impact than service or product innovations in healthcare?
5 answers
Process innovations have a bigger impact than service or product innovations in healthcare due to their association with firm performance. Process innovations, particularly in healthcare organizations, are crucial for enhancing efficiency, quality, and patient outcomes. These innovations involve changes in healthcare processes, such as digitalization, which can lead to higher effectiveness in healthcare delivery. Moreover, the healthcare industry's response to critical needs, such as addressing chronic diseases or global pandemics like COVID-19, necessitates continuous innovation in processes to meet evolving challenges. By focusing on improving internal operations and workflows, process innovations in healthcare can drive significant improvements in patient care, cost-effectiveness, and overall organizational performance, making them more impactful than service or product innovations.
How does sentiment analysis affect implied volatility slope in financial markets?
4 answers
Sentiment analysis plays a crucial role in influencing implied volatility in financial markets. By extracting sentiment from financial news and social media, researchers have identified correlations between sentiment and stock market movements. Studies have shown that sentiment scores, combined with topic modeling, can enhance the accuracy of forecasting implied volatility indices. Furthermore, news sentiment has been found to impact stock market volatility, especially during significant events like financial crises. The interconnectedness between social media sentiments and market-implied volatilities is evident, with volatility indices being significant transmitters of information to sentiment indices. Overall, sentiment analysis not only influences the directional changes in implied volatility but also aids in improving volatility forecasting models in financial markets.
Why does diversification fail for certain companies?
5 answers
Diversification can fail for certain companies due to various reasons highlighted in the provided contexts. For instance, research indicates that there is a negative correlation between Return on Invested Capital (ROIC) and the extent of diversification. Additionally, in the insurance sector, while diversification can lead to market share growth, it is crucial for companies to focus on creating and selling appealing products to ensure success. Moreover, the complexity of portfolio diversification poses challenges for investors in creating effective security portfolios. Furthermore, the lack of a focused approach and aggressive pursuit of an expanding business portfolio can hinder the creation of great companies, as seen in the case of Chinese companies. Therefore, inadequate focus, complexity, and lack of strategic direction can contribute to the failure of diversification strategies in certain companies.
Why does diversification in management fail for certain companies?
5 answers
Diversification in management can fail for certain companies due to various factors. Research indicates that managerial ownership may not significantly impact company performance. Additionally, the size of the company and the strategy of diversification, compensation of directors, and managerial ownership might not always positively influence company performance. Furthermore, the complexity of diversification strategies and the inability of capital structure to moderate their effects can lead to failure in enhancing company performance. Financial constraints, which can be alleviated through diversification, may also play a role in the success or failure of diversification efforts in management. Therefore, a combination of ineffective managerial ownership, company size, strategy implementation, and financial constraints can contribute to the failure of diversification in management for certain companies.