ABSTRACT
By collecting and sorting the energy demand data of developing and developed countries, this paper makes a comprehensive analysis of their energy demand, including the change of energy demand and the change trend of energy load in various sectors. The survey scope of the article includes the overall change trend of energy supply, natural gas, oil, electricity, coal, renewable energy (such as wind energy, solar energy, geothermal energy, tidal energy, etc.), and the data change of global carbon dioxide emission. Besides, this paper selects a variety of energy sources for comprehensive analysis to analyze the existing change trend in chronological order. The analysis methods include data statistics of primary energy production and consumption, energy intensity analysis of gross domestic product (GDP), production, and demand balance of oil, natural gas, and coal, and study the trade balance between different types of energy in different countries and regions. The regions examined in this review include the organization for economic cooperation and development (OECD); the group of seven (G7); Brazil, Russia, India, China and South Africa (BRICs); the European Union; Europe; North America; the Commonwealth of Independent States (CIS); Asia; Latin America; the Pacific Ocean; the Middle East and Africa. By studying these data, we can make a better summary of the current energy use, so as to conveniently grasp the context of energy development and have a general understanding of the current energy structure. Therefore, individuals and policymakers in the fields of energy trade can think more deeply about the future situation and draw conclusions.
ABSTRACT
By collecting and sorting the energy demand data of developing and developed countries, this paper makes a comprehensive analysis of their energy demand, including the change of energy demand and the change trend of energy load in various sectors. The survey scope of the article includes the overall change trend of energy supply, natural gas, oil, electricity, coal, renewable energy (such as wind energy, solar energy, geothermal energy, tidal energy, etc.), and the data change of global carbon dioxide emission. Besides, this paper selects a variety of energy sources for comprehensive analysis to analyze the existing change trend in chronological order. The analysis methods include data statistics of primary energy production and consumption, energy intensity analysis of gross domestic product (GDP), production, and demand balance of oil, natural gas, and coal, and study the trade balance between different types of energy in different countries and regions. The regions examined in this review include the organization for economic cooperation and development (OECD);the group of seven (G7);Brazil, Russia, India, China and South Africa (BRICs);the European Union;Europe;North America;the Commonwealth of Independent States (CIS);Asia;Latin America;the Pacific Ocean;the Middle East and Africa. By studying these data, we can make a better summary of the current energy use, so as to conveniently grasp the context of energy development and have a general understanding of the current energy structure. Therefore, individuals and policymakers in the fields of energy trade can think more deeply about the future situation and draw conclusions. This review comprehensively analyzes the energy use and demand in developing countries and developed countries, and forecasts the future energy supply and demand in combination with the past development trend.
ABSTRACT
Background: New characteristics have created significant challenges in non-drug regulation on the 2019 Corona Virus Disease (COVID-19) outbreak while there are few related research articles in recent months. In view of these recent developments, a more comprehensive analysis on the role of non-drug control measures (NDC) will provide a further guide for the work on disease prevention faced with a range of changes. Methods: This paper measures and divides the intensity of the NDC into eleven tiers according to the World Health Organization (WHO) and Chinese emergency classification criteria. The paper then proposes a new model for control-measures-susceptible-exposed-infected-removed-dead (CM-SEIRD), based upon the standard susceptible-exposed-infected-removed (SEIR) model, which parameterizing the new characteristics of COVID-19 infection and NDC. The start time and intensity of implementation of the NDC were taken as variables to obtain the special impact of NDC on the COVID-19 epidemic. The theoretical study on variable discretization and continuity was carried out for the Wuhan model system. Findings: NDC can efficiently minimize deaths, minimize infection risk, and delay the outbreak peak for 1-2 months. The highest outbreak time discussed in this study was around 16-23 days. If NDC can be carried out within the time threshold and intensity level, more than 10% of the total death toll will be reduced, more than 8% of the peak infected number will be reduced, and more than 90% of the population will be able to prevent infection. In contrast to the NDC starting time, the intensity of NDC impacts the outbreak more directly and has a good impact on the overall number of people exposed, sick and dead from the beginning to the end. This study also found that it would take 23 days to clear new cases in the blocked areas based on the strength of Chinese control measures. Interpretation: Despite great pressure due to the new characteristics and situation of the COVID-19 outbreak, at this point, NDC is still the most effective prevention and control step. Different countries and regions need to implement strict NDCs as quickly as possible to contain the outbreak and to promote development and economic growth as soon as possible.Funding Statement: Guangxi University.Declaration of Interests: All authors declare no competing interests.