bluuebunny/crossref_metadata_2025_split huggingface dataset:
STEM partnership for design-based learning in PM 2.5 crisis for high school
Authors: Pimthong P , Kityakarn S , Munprom R , Lertcharoenrit T , Ugsonkid S 
Published: August 2021

Abstract
This collaborative action research aimed to understand how a schoolteacher, science educator, mathematics educator, scientist, and engineer were able to work collaboratively in STEM lessons. All researchers took part in STEM activity through design-based learning in the PM 2.5 crisis for high school students in Bangkok. A content analysis approach was used to analyse how the partnership works together and how STEM integration occurred across activities, such as lesson plans, classroom participation, and reflective journal. The positions and roles of science teachers, science and mathematics educators, scientists, and engineers were addressed. Three themes emerged as critical success factors from the present research, namely students’ learning, STEM integration, and good practices in STEM partnerships. This research suggests proper advance preparation for the members of a STEM partnership.
Analysing thai curriculum indicators on the basis of pisa competencies in science and mathematics
Authors: Yangjeen S , Angboonpong N , Chaiwongsurarit S 
Published: August 2021

Abstract
A great challenge of Thai students becoming quality global citizens considerably depends on an ability of education to provide sufficient knowledge, skills, and attributes, especially, in science and mathematics, to acquire competencies necessary for their lives in 21st century. Unfortunately, Thai students’ competencies in science and mathematics assessed by the Programme for International Student Assessment (PISA) still fall behind other students in several countries. This study analysed Thai Basic Education Core Curriculum indicators based on their relevancy to PISA key competencies in science and mathematics, and the key competencies that the core curriculum focuses on were found. Unfortunately, neither those focused competencies in science nor mathematics resulted in any predominant PISA results. This obviously illustrates that only a well-constructed curriculum cannot ensure quality of student learning, but the core curriculum is also required to be well-understood by teachers, who are responsible for delivering a quality learning to their students. It is anticipated that this study could provide a better understanding for Thai teachers that there is still plenty of rooms for improvement in student learning so that Thai students are well-prepared to confront challenges of the future awaits.
Applying home based STEM activities to promote students learning motivation during Covid-19 pandemic
Authors: Yunita H 
Published: August 2021

Abstract
Education today faces new challenges in implementing learning during the Covid -19 pandemic. A compulsion to keep a distance causes learning to be carried out remotely using online methods. During the distance learning process students undergo more independent learning at home and cannot interact directly with teachers and friends. This condition is one of the causes of the lack of student motivation. Family members are major learning companion during a pandemic who could deal directly with students. So that we need a learning innovation that can empower homes and family members as a primary place for learning during home learning activities. This study aims to promote student motivation during the Covid -19 pandemic by applied a home-based STEM model. This model applied when students make learning media on subject of the earth structure and water layers. This study used a Classroom Action Research approach. Class actions are implemented through two cycles of action. Data collection techniques are obtained through observation, interviews, documentation study, and literature study. The research was carried out on class VII-A within 22 students. The results showed that there was an increase in student motivation after the implementation of home-based STEM learning. This is because students feel challenged and have the freedom to develop ideas in making learning media by making use of existing materials. Student interactions with family members during the learning process also play a role in making learning more enjoyable and promote student learning motivation.
Science teachers’ professional development program for designing stem integrated lesson plan
Authors: Srikoom W 
Published: August 2021

Abstract
With the increasing focus on integrated STEM into classrooms to develop learners to meet the needs of complex societies. Thus, teacher development is required to success that point. In this study, researcher provided STEM- focused professional development ( PD) program to science teachers (n = 104). Then, teachers’ artifacts were examined to display the effects of the PD program through participants’ implementations. Descriptive statistic, STEM lesson plan analysis rubric, which developed in this study and content analysis were used to consolidate the findings. According to interventions and tools, the results indicate that STEM-focused PD supports participants to design varieties of STEM lesson plans, which categorized into five distinguished groups. Moreover, the effective and successful characteristics of professional development designing for integrating STEM into classroom were proposed to be developing guidelines’ principles and the challenges of instructing STEM lesson were pointed out as well.
Extreme cold events reduce the stability of mangrove soil mollusc community biomass in the context of climate impact
Authors: Chen Guogui , Gu Xuan , Liu Yi , Shi Xiaofang , Wang Wenqing , Wang Mao 
Published: August 2021

Abstract
The frequency and intensity of climate extreme events are expected to increase with global warming in the future. Climate extreme events, such as an extreme cold event (ECE) will continue to influence the stability of soil fauna community biomass, since climate changes often cause a shift in community compositions and structures (e.g. biomass). Few studies, however, have addressed the effects of climate extreme events on the stability of soil fauna community biomass. A field investigation was conducted from 2007 to 2010 to assess the influence of an ECE on the biomass stability of the soil mollusc community across four mangrove wetlands (∼450 km) in South China. Distance-decay and time-decay were used to test the spatiotemporal dynamics of the community biomass. Network analysis and null model were performed to detect the importance of competitive interactions in shaping the stability of the soil mollusc community biomass. The ECE reduced the biomass of the soil mollusc community but increased the complexity of the spatiotemporal patterns of the community biomass. The ECE increased divergent temporal succession and spatial segregation in the soil mollusc community biomass, reflecting the spatiotemporal dynamics of the soil mollusc community biomass influenced by the ECE. Importantly, the ECE decreased the biomass stability of the soil mollusc community by an average of 34.17%. An increase in the modularity of an interactive network (by 75%) and a rise in the intensity of species competition were found after the ECE, reflecting that the ECE enhanced the competitive interactions of the soil mollusc community. The changes in the biomass stability of the soil mollusc community potentially impact their ability to provide ecosystem functions and services such as food production and carbon sequestration for humans. In general, these findings provide valuable ecological insights concerning the effects of climate extremes on the stability properties of ecological soil communities, thereby providing potential applications for soil management and predicting climate changes.
Late twentieth century rapid increase in high Asian seasonal snow and glacier-derived streamflow tracked by tree rings of the upper Indus River basin
Authors: Chen Feng , Opała-Owczarek Magdalena , Khan Adam , Zhang Heli , Owczarek Piotr , Chen Youping , Ahmed Moinuddin , Chen Fahu 
Published: August 2021

Abstract
Given the reported increasing trends in high Asian streamflow and rapidly increasing water demand in the Indian subcontinent, it is necessary to understand the long‐term changes and mechanisms of snow- and glacier-melt-driven streamflow in this area. Thus, we have developed a June–July streamflow reconstruction for the upper Indus River watershed located in northern Pakistan. This reconstruction used a temperature-sensitive tree-ring width chronology of Pinus wallichiana, and explained 40.9% of the actual June–July streamflow variance during the common period 1970–2008. The high level of streamflow (1990–2017) exceeds that of any other time and is concurrent with the impact of recent climate warming that has resulted in accelerated glacier retreats across high Asia. The streamflow reconstruction indicated a pronounced reduction in streamflow in the upper Indus River basin during solar minima (Maunder, Dalton, and Damon). Shorter periods (years) of low streamflow in the reconstruction corresponded to major volcanic eruptions. Extreme low and high streamflows were also linked with sea surface temperature. The streamflow reconstruction also provides a long-term context for recent high Asian streamflow variability resulting from seasonal snow and glaciers that is critically needed for water resources management and assessment.
Transformer Order Demand Forecasting Based on Grey Forecasting Model
Authors: Xiao Chuncai , Liao Yumei 
Published: August 2021

Abstract
For a grey system, the known information is not enough to create an accurate physical model. But there are some rules or characteristics about time series in it. According to the grey system theory, the internal law can be found to a certain extent. According to the grey system theory, the order demand of transformer can be predicted. This prediction model overcomes the influence of the nonlinear relationship and random fluctuation of the system on the prediction accuracy. The experimental data also show that the prediction accuracy of the model is good, and the result is ideal. According to the prediction model, the transformer enterprises can adjust the production plan in time to adapt to the market changes and improve the economy of the transformer. At the same time, for the whole transformer market, timely prediction is also conducive to the state’s macro-control of the power industry and promote the development of power construction.
Study on the effect of income distribution on NOx emission reduction in China’s industry: based on threshold regression
Authors: Wang Xiaoshuo 
Published: August 2021

Abstract
This paper uses panel data of 30 provinces in China to study the emission reduction effect of different factors on NOx under different income levels, and focuses on the test of threshold characteristics of each influencing factor based on per capita GDP. The research shows that, on the whole, GDP per capita, population size, energy intensity, industrial structure and environmental regulation intensity have threshold characteristics for NOx emission intensity based on GDP per capita. Therefore, in order to improve NOx emission reduction effectiveness, the government should adopt different regional governance strategies based on the income characteristics of different regions.
Research on key technology of soil erosion control of transmission line project in Hilly Area
Authors: Li Li , Xin Hou Xin , Xiaofeng Chen , Xi Chen , Qian Hong 
Published: August 2021

Abstract
Transmission line engineering is characterized by long distance, scattered disturbance, great difference in natural conditions, various types and intensity of soil and water loss. The design of soil and water conservation measures is the key to the layout of soil and water conservation measures for transmission lines in hilly areas. This paper mainly discusses the land consolidation and slope protection technology. In order to provide reference for the typical design of soil and water conservation measures of power transmission and transformation project in hilly area.
A cost-benefit analysis of fuel-switching vs. use MGO: A CHINA-Europe container route case
Authors: Zhang ZhongHao , Liu Ding 
Published: August 2021

Abstract
With the increasingly strict environmental regulations, the relationship between supply and demand of ships in the post-epidemic era is tense, and ship operators are under tremendous pressure. In view of the existing strict sulfur emission reduction regulations and ship freight operating at high levels in the post-epidemic era, ship operators must choose cost-effective compliance options to create better environmental benefits. This study uses a cost-effective framework to analyze ship operations Supplier’s fuel switch and marine natural gasoline compliance options, and apply these options to specific liner routes through China’s SECA. We selected an international freight liner as the research object, and calculated the net present value of the compliance option in consideration of the fuel cost of the ship, the installation and operation and maintenance costs of the compliance option. The study mainly considered the influence of the navigation distance in the emission control area on the proportion of the total navigation distance, and also considered the fuel price difference that has a greater impact on ship operating costs. Our results show that in the post-epidemic era, in accordance with the requirements of environmental protection regulations, considering the ratio of SECA and the price difference between MGO and high-sulfur fuels, the use of fuel conversion is a necessary option. We also calculated the emissions of ships, and the results show that with the expansion of the emission control area, the use of MGO can achieve better emission reduction effects. Our results show that in the post-epidemic era, Considering the ratio of SECA and the price difference between low-sulfur and high-sulfur fuels, fuel conversion is the best option. We also calculated the emissions of ships, and the results show that with the expansion of the emission control area, the use of MGO oil can achieve better emission reduction effects.
Correlation of Energy Transition and Coordinated Development in the Beijing-Tianjin-Hebei (BTH) Region
Authors: Huang Ren , Chu Wenjia , Zhang Sufang 
Published: August 2021

Abstract
Due to the serious air pollution problem since 2012 in the Beijing-Tianjin-Hebei (BTH) region, the Chinese government launched the national strategy of the BTH Coordinated Development (the BTHCD). Meanwhile, energy transition is also a national strategy in the region. What is the relationship between these two strategies, and in particular how can energy transition serve BTHCD strategy? Firstly, the paper identifies the three main areas of the BTHCD strategy, namely, transportation integration, industrial upgrading and transfer, and ecological and environmental protection, and finds that the ultimate goals of the strategy are to promote economic growth and environment protection in the region. Then, an empirical study is conducted by using the BVAR model, which further shows the that energy transition and BTHCD are closely related. Finally, policy recommendations are made for enabling an energy transition that supports the BTHCD.
Overview of the Application of Energy Consumption Forecast Models in Energy Efficiency Optimization
Authors: Liu Ren , Wang Zhonghang , Chen Haihong , Yang Jie 
Published: August 2021

Abstract
Energy consumption analysis, and energy demand forecasting and energy conservation effect evaluation based on such analysis are important bases for energy efficiency management. The wide application of AI machine learning methods in energy consumption forecasting not only expands the research route of energy consumption forecasting, but also provides a new perspective for energy efficiency optimization. The purpose of this article is to summarize the important applications of AI machine learning methods in the research of energy consumption forecasting-data-driven models and traditional forward models, and the comparison and application of the two types of models, and conclude the common application scenarios and technical routes of forecast models in the research of energy efficiency optimization so as to provide comprehensive model methods, application scenarios, forecast conditions and other multi-dimensional bases for energy consumption forecasting researchers. On this basis, the research questions and development needs in the research of energy consumption forecasting at the application and basic levels are raised herein.
Research on the evaluation index system of “new energy cloud” operation mode based on CRITIC weighting method and AHP method
Authors: Wang Xingang , Zhou Zhuan , Sun Licheng , Xie Guohui , Lou Qihe 
Published: August 2021

Abstract
Accelerating the development of new energy is an inevitable trend of the energy low-carbon transition. Information technology means and new energy and new energy business management are combined by most energy enterprises, so as to further improve the coordination of source, network and storage load in the development of new energy, solve the problem of new energy consumption, and improve the management efficiency. This study takes the “new energy cloud” platform of State Grid Corporation of China as the research object. Firstly, the basic architecture and operation mode of the cloud platform is analyzed; secondly, according to the characteristics of the operation mode, the evaluation index system of the “new energy cloud” operation mode is constructed from four dimensions of business, capital, learning and growth, and data. At the same time, the actual data of nine provinces that have deployed the “new energy cloud” platform are selected, and the weight of the evaluation index is determined by using the CRITIC—AHP method. This study can provide a model reference for related energy enterprises to build new energy business management platforms, and provide a practical reference for the evaluation of new energy business operation mode.
Comparative Analysis of Typical Grab Knots Force Test in Rope Rescue
Authors: Zhang Yuhai , Li Jianfeng , He Zhongquan , Cheng Jianxin , Tan Zhiyong , Liu Liwen 
Published: August 2021

Abstract
Fire rescue is all-weather and all-time. Using rope rescue technology to carry out rescue operations is one of the efficient and convenient methods adopted by firefighters. Grab knots are an important part of this field. This article introduces typical grab knots such as Prusik knot, French knot, Klemheist knot and uses 10.5mm and 12.5mm as main ropes, 6mm, 7mm and 8mm as auxiliary ropes and related equipments in rope rescue to carry out parallel tests by using tensile testing machine. It can be found that the larger the diameter of rope, the greater the maximum tensile force the grab knot will bear. The larger the diameter difference between the main rope and auxiliary rope, the smaller the sliding distance is, and the force effect can be better. Those three types of grab knots have different characteristics and should be selected according to the actual situation. Relatively speaking, the Prusik knot is more suitable for fire rescue. It is hoped that it will help to improve the firefighters’ understanding of typical grab knots, and play a certain reference value for the safety assessment, so as to ensure the scientific and safety of rescue operations.
Study on the whole process evaluation of new energy grid connection based on AHP-entropy weight method
Authors: Wang Xingang , Zhou Zhuan , Sun Licheng , Xie Guohui , Lou Qihe 
Published: August 2021

Abstract
In order to promote the transformation of energy consumption structure to low carbon, in recent years, China has vigorously promoted the development of new energy and increased the proportion of new energy installed capacity in the power sector. However, due to the lack of benefits evaluation of the whole process of new energy grid connection at present, the existing project experience cannot provide reference and guidance for subsequent project construction to improve the benefits of new energy grid connection. Based on the existing operation data of the “New Energy Cloud” platform of State Grid Corporation of China, this study constructed the evaluation index system for the whole process of new energy grid-connection, and evaluated the benefits and quality of the project from the three stages before, during and after the grid-connection. The research results will be applied to the development of the evaluation module of the “new energy cloud” platform of State Grid Corporation of China, and can also provide a reference for the evaluation of the construction of new energy projects in the energy industry.
Research Progress of Electrostatic Water Treatment Technology
Authors: Liu Zhan , Yan Meifang , Gao Yuhua , Li Haihua , Li Na , Liu Zhenfa 
Published: August 2021

Abstract
In recent years, due to the increasing of environmental pressure, the complicated process of chemical treatment and the pollution caused by sewage to the water, it has become the general trend of the current development to search for the treatment technology of industrial circulating cooling water with low energy consumption, water saving and emission reduction. Physical method is simple to operate, non-toxic and pollution-free, no secondary pollution. As one of the commonly used physical water treatment technologies, the study of electrostatic water treatment technology has important significance. This paper studies and summarizes its research, hoping to further clarify the effect and mechanism of electrostatic water treatment technology on the basis of previous studies.
The analysis and discussion on ventilation and energy-saving of the tunnels of Long Highway
Authors: Sitao Li , Zhiqiang Liu , Peifeng Li , Haifeng Jiang , Linglin Bai 
Published: August 2021

Abstract
Along with the construction and development of highways in China, there are more and more tunnels in the highways, and their operational security and energy-saving have been paid wide attention to. The ventilation facilities for road tunnels are very important in the construction of electromechanical facilities in the tunnels of Changda Highway, and they are the important warranting facilities for the safe operation of the tunnels in Changda Highway [1]. The problems of large energy consumption and high operation expenditure of the tunnels in Changda Highway become more and more prominent day by day. Therefore, it is very important to research the secure and economic technology of tunnel energy-saving, especially the ventilation and energy-saving technologies for tunnels. This paper is based on the engineering of extra-long Wulaoshan Tunnel in Mojiang-Lincang Highway, and it researches the ventilation and comprehensive energy-saving of the tunnels in Changda Highway – it performs the detailed analysis and research in many aspects, such as the optimized design of ventilation facilities in the tunnels of Changda Road, the intelligent control of air blower, the energy-saving power supply and distribution facilities for ventilation as well as operation and managements, and it can provide technical references for the future development of energy-saving ventilation measures of the tunnels in Changda Highway.