This article solved the problems like quantitative model of light pollution degree is established; we decision three model is used to predict the risk levels of light pollution in four different regions. In this paper, 16 evaluation indexes are selected, which are analyzed and processed by simple data reduction, and 5 indexes which have great influence factors and are widely concerned are selected. The classification model of light pollution level based on ID3 decision tree was established to evaluate the light pollution level of each region.
{"title":"Evaluation model of light pollution level based on ID3 decision tree","authors":"Xin Wang, Xinshe Qi, Xinwei Gao, Cuicui Gao, Na Wang, Shasha Wu","doi":"10.62051/15xh9t18","DOIUrl":"https://doi.org/10.62051/15xh9t18","url":null,"abstract":"This article solved the problems like quantitative model of light pollution degree is established; we decision three model is used to predict the risk levels of light pollution in four different regions. In this paper, 16 evaluation indexes are selected, which are analyzed and processed by simple data reduction, and 5 indexes which have great influence factors and are widely concerned are selected. The classification model of light pollution level based on ID3 decision tree was established to evaluate the light pollution level of each region.","PeriodicalId":517926,"journal":{"name":"Transactions on Environment, Energy and Earth Sciences","volume":" 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140389398","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This paper aims to quantitatively analyze the influence of mine geological engineering on regional geological environment, and discuss the application and optimization of sustainable development strategy in this field. This paper first analyzes the main types of mine geological engineering and its influence mechanism on geological environment, then evaluates these influences and discusses the practice and effect of sustainable development strategy in mine geological engineering. This paper puts forward the direction of strategy optimization based on the influence of geological environment, and emphasizes the importance of technological innovation, management mechanism and policies and regulations in strategy optimization.
{"title":"Quantitative analysis of the influence of mine geological engineering on regional geological environment and research on sustainable development strategy","authors":"Jiahui Huang","doi":"10.62051/rj81hg60","DOIUrl":"https://doi.org/10.62051/rj81hg60","url":null,"abstract":"This paper aims to quantitatively analyze the influence of mine geological engineering on regional geological environment, and discuss the application and optimization of sustainable development strategy in this field. This paper first analyzes the main types of mine geological engineering and its influence mechanism on geological environment, then evaluates these influences and discusses the practice and effect of sustainable development strategy in mine geological engineering. This paper puts forward the direction of strategy optimization based on the influence of geological environment, and emphasizes the importance of technological innovation, management mechanism and policies and regulations in strategy optimization.","PeriodicalId":517926,"journal":{"name":"Transactions on Environment, Energy and Earth Sciences","volume":" 25","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140389362","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
To solve the defects of insufficient heating capacity and high energy cost in the traditional heating mode of the thermal power plant, two 300 MW pumped-condensing air-cooled heating units are retrofitted by adopting a high backpressure operation mode and utilizing the low-temperature heat source quality-improving hybrid heating technology. It is found that when the load is 210 MW and the operating back pressure is 45 kPa and 54 kPa after the retrofit, the consumption of standard coal for every 1 GJ of heat is 8.19 kg and 9.76 kg, which is 16.81 kg and 15.24 kg less than that of the traditional heat supply method. When the load is 250 MW and the operating back pressure is 45 kPa, the consumption of standard coal is 8.65 kg per GJ of heat supplied, which is 16.35 kg less than that of the traditional heating method. The ROI of the retrofit is 49.01%, with a payback period of about 2.04 years, after which it can bring an annual profit of 24.5504 million RMB per year to the power plant. It can reduce the emission of soot by 152.17 t, carbon dioxide by 82.17 t, sulfur dioxide by 258.68 t, and nitrogen oxides by 225.20 t per year. Therefore, this transformation is a green and efficient, energy-saving, and environmentally friendly technology with high economic returns and good prospects, providing a way of thinking about the new heating technology of the power plant.
{"title":"Thermal Power Plants Hybrid Heat Supply Technology for Low-Temperature Heat Source Enhancement Economic Analysis","authors":"Haoran Xu, Chengan Jiang, Chengfei Xu, Yanni Jiang","doi":"10.62051/jmc9c212","DOIUrl":"https://doi.org/10.62051/jmc9c212","url":null,"abstract":"To solve the defects of insufficient heating capacity and high energy cost in the traditional heating mode of the thermal power plant, two 300 MW pumped-condensing air-cooled heating units are retrofitted by adopting a high backpressure operation mode and utilizing the low-temperature heat source quality-improving hybrid heating technology. It is found that when the load is 210 MW and the operating back pressure is 45 kPa and 54 kPa after the retrofit, the consumption of standard coal for every 1 GJ of heat is 8.19 kg and 9.76 kg, which is 16.81 kg and 15.24 kg less than that of the traditional heat supply method. When the load is 250 MW and the operating back pressure is 45 kPa, the consumption of standard coal is 8.65 kg per GJ of heat supplied, which is 16.35 kg less than that of the traditional heating method. The ROI of the retrofit is 49.01%, with a payback period of about 2.04 years, after which it can bring an annual profit of 24.5504 million RMB per year to the power plant. It can reduce the emission of soot by 152.17 t, carbon dioxide by 82.17 t, sulfur dioxide by 258.68 t, and nitrogen oxides by 225.20 t per year. Therefore, this transformation is a green and efficient, energy-saving, and environmentally friendly technology with high economic returns and good prospects, providing a way of thinking about the new heating technology of the power plant.","PeriodicalId":517926,"journal":{"name":"Transactions on Environment, Energy and Earth Sciences","volume":" 18","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140389265","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Qingyun Guan, Chongzheng Wang, Yi Zhang, Lin Chen, Xiayi Yuan
Based on the smooth particle hydrodynamics method, a rain simulation model of the front windshield lower trim panel system was established in AVL PreonLab simulation software, and it was found that the risk of air conditioning inlet and wiper motor is low risk under the original scheme, but the risk of water in the cabin is greater. Considering the weakening of the sealing effect after the durability of the sealing cotton, the water may flow into the cabin; secondly, the water barrier bars on both sides of the wiper cover are not wide enough in the Y direction, and the water will flow into the cabin when the rain is heavy. Through the simulation analysis of the optimization scheme, the problem of water in the cabin can be solved, and the problem can be found in advance at the design stage, and the optimization scheme can be proposed to reduce the development cost of the whole vehicle, which is an important guidance for the development of water management of the whole vehicle.
基于光滑粒子流体力学方法，在AVL PreonLab仿真软件中建立了前风挡下饰板系统的雨水仿真模型，发现原方案下空调进风口和雨刮电机风险较低，但机舱进水风险较大。考虑到密封棉耐用后密封效果减弱，水可能会流入机舱；其次，雨刮盖两侧的挡水条在 Y 方向的宽度不够，雨大时水会流入机舱。通过对优化方案的仿真分析，可以解决机舱进水的问题，在设计阶段提前发现问题，提出优化方案，降低整车开发成本，对整车水管理的发展具有重要的指导意义。
{"title":"Rainfall simulation analysis of front windshield lower trim panel system based on SPH method","authors":"Qingyun Guan, Chongzheng Wang, Yi Zhang, Lin Chen, Xiayi Yuan","doi":"10.62051/xzmjr618","DOIUrl":"https://doi.org/10.62051/xzmjr618","url":null,"abstract":"Based on the smooth particle hydrodynamics method, a rain simulation model of the front windshield lower trim panel system was established in AVL PreonLab simulation software, and it was found that the risk of air conditioning inlet and wiper motor is low risk under the original scheme, but the risk of water in the cabin is greater. Considering the weakening of the sealing effect after the durability of the sealing cotton, the water may flow into the cabin; secondly, the water barrier bars on both sides of the wiper cover are not wide enough in the Y direction, and the water will flow into the cabin when the rain is heavy. Through the simulation analysis of the optimization scheme, the problem of water in the cabin can be solved, and the problem can be found in advance at the design stage, and the optimization scheme can be proposed to reduce the development cost of the whole vehicle, which is an important guidance for the development of water management of the whole vehicle.","PeriodicalId":517926,"journal":{"name":"Transactions on Environment, Energy and Earth Sciences","volume":" 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140389732","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This paper takes the leachate sludge produced from the Guangzhou refuse landfill as the research object and selects sulfoaluminate cement as the fixation to solidify/stabilize the sludge. Meanwhile, bottom-slag is selected as the supplementary fixation. Through unconfined compressive strength test and Scanning electron microscope (SEM), the effect of the mixing amount of cement and bottom-slag on the sludge’s strength is systematically studied. Results show that sulfoaluminate cement can improve the strength of solidified sludge. Sulfoaluminate cement can increase the strength of samples by promoting the hydration reaction, but the effect is better when the content exceeds 40%. When the cement content is fixed, the strength of the sample increases with the bottom slag content. When the bottom slag content exceeds 10%, the proportion of cement in the hydration reaction will decrease, and then the strength of the sample will increase first and then decrease. In addition, under different cement contents, the sample will reach the peak value when the bottom slag content is 10%. Thus, 40% cement + 10% bottom slag is the relative optimal content.
{"title":"Experimental Study on Solidification of Leachate Sludge with High Salt Content by Waste Incineration Bottom Slag","authors":"Chao Zheng, Kangwei Xiong, Jilin Jiang, Nan Zhang","doi":"10.62051/a9g8gs87","DOIUrl":"https://doi.org/10.62051/a9g8gs87","url":null,"abstract":"This paper takes the leachate sludge produced from the Guangzhou refuse landfill as the research object and selects sulfoaluminate cement as the fixation to solidify/stabilize the sludge. Meanwhile, bottom-slag is selected as the supplementary fixation. Through unconfined compressive strength test and Scanning electron microscope (SEM), the effect of the mixing amount of cement and bottom-slag on the sludge’s strength is systematically studied. Results show that sulfoaluminate cement can improve the strength of solidified sludge. Sulfoaluminate cement can increase the strength of samples by promoting the hydration reaction, but the effect is better when the content exceeds 40%. When the cement content is fixed, the strength of the sample increases with the bottom slag content. When the bottom slag content exceeds 10%, the proportion of cement in the hydration reaction will decrease, and then the strength of the sample will increase first and then decrease. In addition, under different cement contents, the sample will reach the peak value when the bottom slag content is 10%. Thus, 40% cement + 10% bottom slag is the relative optimal content. ","PeriodicalId":517926,"journal":{"name":"Transactions on Environment, Energy and Earth Sciences","volume":" 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140389401","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
It is hard to measure the crystalline heat of CL-20 accurately, not only due to the instrument precision, but also β-polymorph transforming to ε-polymorph can be found easily and frequently in the crystallization progress. This work presents a study of experiments to clarify the crystallization model of ε-CL-20 and α-CL-20 using a solvent/antisolvent method by microcalorimetry without β-polymorph appearing. The results show that the crystallization progresses of ε-CL-20 and α-CL-20 are exothermic and they are fit the theory of Burton-Cabrera-Frank dislocation theory．
{"title":"Investigation of the Dilution/Crystallization of CL-20 by Microcalorimetry","authors":"Simin Zhu, Weiwei Ge, Liu Yang, Kaiqiang He","doi":"10.62051/ny1m2y96","DOIUrl":"https://doi.org/10.62051/ny1m2y96","url":null,"abstract":"It is hard to measure the crystalline heat of CL-20 accurately, not only due to the instrument precision, but also β-polymorph transforming to ε-polymorph can be found easily and frequently in the crystallization progress. This work presents a study of experiments to clarify the crystallization model of ε-CL-20 and α-CL-20 using a solvent/antisolvent method by microcalorimetry without β-polymorph appearing. The results show that the crystallization progresses of ε-CL-20 and α-CL-20 are exothermic and they are fit the theory of Burton-Cabrera-Frank dislocation theory．","PeriodicalId":517926,"journal":{"name":"Transactions on Environment, Energy and Earth Sciences","volume":" 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140389884","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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