Journal of Physics-Photonics最新文献_第10页

Marangoni convection in a C-shape enclosure with partially heated walls 带有部分加热壁的c形外壳中的马兰戈尼对流

Journal of Physics-Photonics Pub Date : 2023-11-01 DOI: 10.1088/1742-6596/2633/1/012016

Zailan Siri, Sharifah Nuriza S M N Al ‘Idrus

引用次数: 0

Assessing the potential of CO₂ huff ‘n’ puff technology for enhanced oil recovery and CO₂ sequestration in tight oil reservoirs 评估CO2吞吐技术在致密油储层提高采收率和二氧化碳封存方面的潜力

Journal of Physics-Photonics Pub Date : 2023-11-01 DOI: 10.1088/1742-6596/2636/1/012001

Longhui Yu, Hangyu Li, Junrong Liu, Shuyang Liu, Zhiqiang Wang, Qizhi Tan

{"title":"Assessing the potential of CO2 huff ‘n’ puff technology for enhanced oil recovery and CO2 sequestration in tight oil reservoirs","authors":"Longhui Yu, Hangyu Li, Junrong Liu, Shuyang Liu, Zhiqiang Wang, Qizhi Tan","doi":"10.1088/1742-6596/2636/1/012001","DOIUrl":"https://doi.org/10.1088/1742-6596/2636/1/012001","url":null,"abstract":"Abstract Fossil fuels utilization will produce a large amount of CO 2 , which causes a series of environmental problems. However, the exhaust CO 2 can be used to achieve oil recovery improvement (CO 2 EOR), while simultaneously allowing for the geological storage of CO 2 . For the unconventional reservoir, CO 2 huff ‘n’ puff (HNP) is a potential technology showing promising results in laboratory experiments, while its effectiveness in enhancing oil recovery and CO 2 sequestration at the reservoir scale remains uncertain. Thus, further research is needed to evaluate the CO 2 HNP performance for its implementation. In this paper, we conducted a numerical simulation of the CO 2 HNP process in a real tight oil reservoir (1800 m × 350 m × 10m in size) to assess its potential for improving oil recovery, CO 2 injectivity, and CO 2 sequestration. The results show that the accumulative oil production increased by more than 20% after the implementation of CO 2 HNP. Meanwhile, CO 2 HNP in tight oil reservoirs is proven capable to achieve CO 2 injectivities of more than 4×10 7 SCm 3 and CO 2 storages of more than 5×10 6 SCm 3 . We designed 3 CO 2 HNP schemes and found that the largest CO 2 storage does not occur in the optimal scenario for oil production. A new type of CO 2 HNP evaluation system considering oil production and storage capacity needs to be established. The results of the article suggest that CO 2 HNP can achieve an oil production increase and CO 2 storage in tight reservoirs, which has a positive significance for the sustainable development of environmental protection.","PeriodicalId":44008,"journal":{"name":"Journal of Physics-Photonics","volume":"13 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135764998","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}

引用次数: 0

Prior Knowledge-guided Hierarchical Action Quality Assessment with 3D Convolution and Attention Mechanism 基于三维卷积和注意机制的先验知识引导分层动作质量评估

Journal of Physics-Photonics Pub Date : 2023-11-01 DOI: 10.1088/1742-6596/2632/1/012027

Haoyang Zhou, Teng Hou, Jitao Li

{"title":"Prior Knowledge-guided Hierarchical Action Quality Assessment with 3D Convolution and Attention Mechanism","authors":"Haoyang Zhou, Teng Hou, Jitao Li","doi":"10.1088/1742-6596/2632/1/012027","DOIUrl":"https://doi.org/10.1088/1742-6596/2632/1/012027","url":null,"abstract":"Abstract Recently, there has been a growing interest in the field of computer vision and deep learning regarding a newly emerging problem known as action quality assessment (AQA). However, most researchers still rely on the traditional approach of using models from the video action recognition field. Unfortunately, this approach overlooks crucial features in AQA, such as movement fluency and degree of completion. Alternatively, some researchers have employed the transformer paradigm to capture action details and overall action integrity, but the high computational cost associated with transformers makes them impractical for real-time tasks. Due to the diversity of action types, it is challenging to rely solely on a shared model for quality assessment of various types of actions. To address these issues, we propose a novel network structure for AQA, which is the first to integrate multi-model capabilities through a classification model. Specifically, we utilize a pre-trained I3D model equipped with a self-attention block for classification. This allows us to evaluate various categories of actions using just one model. Furthermore, we introduce self-attention mechanisms and multi-head attention into the traditional convolutional neural network. By systematically replacing the last few layers of the conventional convolutional network, our model gains a greater ability to sense the global coordination of different actions. We have verified the effectiveness of our approach on the AQA-7 dataset. In comparison to other popular models, our model achieves satisfactory performance while maintaining a low computational cost.","PeriodicalId":44008,"journal":{"name":"Journal of Physics-Photonics","volume":"97 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135715700","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}

引用次数: 0

Optimization of an Air-cooling Thermal Management System for Lithium-ion Battery Packs via Particle Swarm Algorithm 基于粒子群算法的锂离子电池组风冷热管理系统优化

Journal of Physics-Photonics Pub Date : 2023-11-01 DOI: 10.1088/1742-6596/2636/1/012006

Wenbo Wu

{"title":"Optimization of an Air-cooling Thermal Management System for Lithium-ion Battery Packs via Particle Swarm Algorithm","authors":"Wenbo Wu","doi":"10.1088/1742-6596/2636/1/012006","DOIUrl":"https://doi.org/10.1088/1742-6596/2636/1/012006","url":null,"abstract":"Abstract Recently, lithium-ion batteries have attracted many researchers and their safety issues such as overheating, combustion and explosion continue to further limit battery application scenarios. These issues are mainly caused by unoptimized battery structure parameters or cooling methods. In this paper, an integrated approach has been proposed to design an efficient air-cooling system using the particle swarm algorithm to find an optimal relationship between air flow rate and battery temperature. Firstly, this method can adjust an optimized air flow rate to ensure that the battery temperature is minimized with the lowest energy consumption via the particle swarm algorithm. Additionally, an optimized air flow rate can still be obtained with the change of structure parameters such as the radius in a lithium-ion battery pack via this novel algorithm. Then, we demonstrate the feasibility of this integrated method in simulations. Compared with the previous work, this method can employ the continuous modulation of the particle swarm algorithm, realizing both the best cooling capacity of the battery cooling system and simultaneously the lowest energy consumption for cooling in cell heat regulation systems. Meanwhile, temperature variations of the entire cell pack are also shown in simulations. In contrast to previous approaches, this integrated method may provide more dynamic thermal management inspirations for designing novel battery thermal management systems.","PeriodicalId":44008,"journal":{"name":"Journal of Physics-Photonics","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135763523","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}

引用次数: 0

Research on safety issues and safety analysis of new energy aircraft 新能源飞机安全问题研究与安全分析

Journal of Physics-Photonics Pub Date : 2023-11-01 DOI: 10.1088/1742-6596/2633/1/012006

Tang Chu, Li Zhongyang, Wang Libo

引用次数: 0

Design of Automatic Insect Trap Hypothenemus hampei Ferr. based on Solar Cells as a Source of Stinging Energy 自动捕虫器的设计。基于太阳能电池作为刺痛能量的来源

Journal of Physics-Photonics Pub Date : 2023-11-01 DOI: 10.1088/1742-6596/2623/1/012010

R E Rachmanita, S Anggraini, M I R Apriadana

{"title":"Design of Automatic Insect Trap Hypothenemus hampei Ferr. based on Solar Cells as a Source of Stinging Energy","authors":"R E Rachmanita, S Anggraini, M I R Apriadana","doi":"10.1088/1742-6596/2623/1/012010","DOIUrl":"https://doi.org/10.1088/1742-6596/2623/1/012010","url":null,"abstract":"Abstract One of the plant-disturbing organisms that always harms coffee plants is the insect Hypothenemus hampei Ferr. which causes fruit borer attacks. This study aims to design a solar panel-based H. hampei trapper. This tool is designed to work automatically according to the settings on the solar charge controller; it can catch H. hampei effectively; this tool has a low current (DC) that is safe for farmers; this tool can be used in plantation areas far from PLN because the source of electrical energy comes from solar cells; maintenance costs are relatively cheap, but the tool is designed to operate in the long term. The H. hampei trap uses solar panels as an energy source and is equipped with a stinger that works automatically by utilizing the solar charge controller feature. The functional test results show that the tool that has been designed can work well according to the plan made. The average consumption of stingers is 23.70 Wh. The average panel energy yield is 26.85 Wh. The panels’ energy output has exceeded the amount of energy the stingers need. The tool is designed to trap H. hampei well.","PeriodicalId":44008,"journal":{"name":"Journal of Physics-Photonics","volume":"22 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135763528","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}

引用次数: 0

Could Physics Teachers Also Have Misconceptions on Basic Kinematics? 物理教师对基本运动学也会有误解吗?

Journal of Physics-Photonics Pub Date : 2023-11-01 DOI: 10.1088/1742-6596/2623/1/012025

S Admoko, None Suliyanah

{"title":"Could Physics Teachers Also Have Misconceptions on Basic Kinematics?","authors":"S Admoko, None Suliyanah","doi":"10.1088/1742-6596/2623/1/012025","DOIUrl":"https://doi.org/10.1088/1742-6596/2623/1/012025","url":null,"abstract":"Abstract The role of a physics teacher in learning is to facilitate student activities to construct correct conceptual understanding as that of a scientist. As the primary source of knowledge for students, a physics teacher is required to have the right concept, but this demand is not necessarily fully fulfilled. This study aims to determine the profile of physics teachers’ understanding of concepts on kinematics material detected by a four-tier misconception test. Participants in this study were 20 high school physics teachers in Surabaya. Based on the results of data analysis, it was found that the dominant misconceptions included: (1) Two objects that make the same displacement at the same time interval will have the same velocity, regardless of the type of movement of the two objects (2) Objects that move vertically straight up or down will always have the acceleration of motion equal to the acceleration of gravity which is directed downwards. (3) As long as the object’s position is at positive coordinates, it means the object is moving in the forward direction. (4) The graph of velocity against time, which has a positive gradient, means that the object always moves forward (5) In parabolic motion, the length of time an object is in the air only depends on the length of its path, the longest path will require the longest time. (6) In parabolic motion, the final speed of an object when it lands on the ground depends not only on its initial speed but also on its elevation angle. The findings of several misconceptions above show that even a physics teacher cannot escape misconceptions. Therefore, it is crucial for a teacher to be able to remedy the misconceptions he suffers so that these misconceptions are not transmitted to the students he teaches. This finding is the first step for researchers to detect misconceptions, followed by the application of certain learning methods to remedy misconceptions in future research.","PeriodicalId":44008,"journal":{"name":"Journal of Physics-Photonics","volume":"21 6","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135763530","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}

引用次数: 0

Study of Performance Graphene Oxide Modification of LiFePO₄/C Material for The Cathode of Li-Ion Batteries 锂离子电池正极材料LiFePO4/C性能氧化石墨烯改性研究

Journal of Physics-Photonics Pub Date : 2023-11-01 DOI: 10.1088/1742-6596/2623/1/012014

N H Hana, None Munasir

{"title":"Study of Performance Graphene Oxide Modification of LiFePO4/C Material for The Cathode of Li-Ion Batteries","authors":"N H Hana, None Munasir","doi":"10.1088/1742-6596/2623/1/012014","DOIUrl":"https://doi.org/10.1088/1742-6596/2623/1/012014","url":null,"abstract":"Abstract The need for energy storage is increasing rapidly along with technological development. Lithium ion batteries are one of the energy storages that are in great demand due to their high specific capacity and energy density, discharge voltage of 3.4 volts, and environmental friendliness. LiFePO 4 is a lithium-ion battery cathode material with a high specific capacity of 170 mAh/g and a discharge voltage of about 3.4 V, thermal stability, high energy density, environmentally friendly, and easy to obtain. However, it has low electrical conductivity and poor ion diffusion, which hinders energy storage. Carbon modification is a method that has the advantage of reducing particle size and preventing agglomeration in nanoparticles, so this method is widely researched to improve lithium ion diffusion coefficient and conductivity in lithium ion batteries. This study aims to describe the effect of GO modification on the characterization of LiFePO 4 /C-GO composite material and LiFePO 4 /C-GO composite material battery performance as a lithium ion battery cathode material. In this study, it can be seen that the addition of GO in LiFePO 4 cathode material can improve battery performance. The LiFePO 4 /C-GO-10 cathode obtained the most effective results with the lowest Rct value of 95.21 Ω and the highest conductivity value of 14.3×10- 6 S/cm indicating the best electron transport. The Rct value decreased with the addition of GO, and the conductivity value increased with the addition of GO.","PeriodicalId":44008,"journal":{"name":"Journal of Physics-Photonics","volume":"21 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135763533","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}

引用次数: 0

Analysis and Suppression of Thrust Fluctuations in Halbach-type Permanent Magnet Synchronous Linear Motors halbach型永磁同步直线电机推力波动分析与抑制

Journal of Physics-Photonics Pub Date : 2023-11-01 DOI: 10.1088/1742-6596/2636/1/012017

Gixian Cheng, Shuhua Wang

引用次数: 0

Archimedean Screw Based Micro Hydro Power Plant (MHPP) Prototype with Turbine Elevation Angle Parameters 阿基米德螺旋微型水力发电厂(MHPP)原型与水轮机仰角参数

Journal of Physics-Photonics Pub Date : 2023-11-01 DOI: 10.1088/1742-6596/2623/1/012026

B Indarto, D N Kumalasari, M A Bustomi

{"title":"Archimedean Screw Based Micro Hydro Power Plant (MHPP) Prototype with Turbine Elevation Angle Parameters","authors":"B Indarto, D N Kumalasari, M A Bustomi","doi":"10.1088/1742-6596/2623/1/012026","DOIUrl":"https://doi.org/10.1088/1742-6596/2623/1/012026","url":null,"abstract":"Abstract Electrical energy has a very important role in human life, but the electricity supply still needs to meet society’s needs fully. Many potential energy resources can be converted into electrical energy. One of the potential energy resources is the flow of water, which can be used for micro-hydro power plants in remote areas. This paper presents the results of an analysis of a prototype Micro Hydro Power Plant (MHPP) using a 3-blade turbine with a gearbox ratio of 2.8:1. The purpose of the analysis is to determine the greatest value of voltage, current, power, rpm, torque, and efficiency based on variations in the angle of the turbine tilt of 20°, 25°, 30°, and 35° at a water debit of 2.91 l/s and a generator in the form of BLDC 3 phase. The measurement results and data analysis found that the turbine tilt angle of 20° produced the greatest voltage, rpm, torque, and efficiency values. This is because the increase in the angle of inclination of the turbine results in an addition to the volume of the bucket so that the speed of the water flow in the turbine increases. As a result of the addition of this water flow, the turbine becomes heavier to rotate so that the efficiency value decreases.","PeriodicalId":44008,"journal":{"name":"Journal of Physics-Photonics","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135763780","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}

引用次数: 0