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Design and engineering application of a new type of copper bar-embedded metering box based on DFA theory 一种基于DFA理论的新型铜棒嵌入式计量箱的设计与工程应用
Q1 Engineering Pub Date : 2023-11-01 DOI: 10.1088/1742-6596/2636/1/012008
Zhiru Chen, Xi Zhao, Zhi Zhang, Zhen Jing
Abstract Based on the design theory that products can be assembled, the optimal design of the electric energy metering box in the embedded copper bar and other aspects is realized, the product wiring is standardized and concealed, the assembly method is optimized, the assembly difficulty is greatly reduced, several problems in cost and quality are solved in industrial design, and objective score data from experts are obtained through perceptual experiments. It provides a new design method and evaluation idea for the field of power measurement and has great popularization value.
摘要基于产品可组装的设计理论,实现了电能计量箱在嵌入式铜排等方面的优化设计,使产品布线标准化、隐藏化,优化了装配方式,大大降低了装配难度,解决了工业设计中成本和质量方面的若干问题,并通过感性实验获得了专家的客观评分数据。为功率测量领域提供了一种新的设计方法和评价思路,具有很大的推广价值。
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引用次数: 0
Lead-free Perovskites TlGeClxBr3-x (x=0,1,2,3) as Promising Materials for Solar Cell Application: a DFT Study 无铅钙钛矿TlGeClxBr3-x (x=0,1,2,3)作为太阳能电池材料的DFT研究
Q1 Engineering Pub Date : 2023-11-01 DOI: 10.1088/1742-6596/2623/1/012002
R K Pingak, A Z Johannes, N U J Hauwali, U A Deta
Abstract This study investigates the structural parameters and the electronic properties of cubic TlGeCl x Br 3-x (x=0,1,2,3) lead-free perovskites to evaluate their potential as absorbers in perovskite solar cell devices. Density Functional Theory (DFT) embedded in the Quantum Espresso code was used to calculate these properties. The results revealed that the compounds have optimized lattice constants of 5.244 Å, 5.336 Å, 5.416 Å, and 5.501 Å, for TlGeCl 3 , TlGeCl 2 Br, TlGeClBr 2 , and TlGeBr 3 perovskites, respectively. In addition, the compounds are direct band gap (R → R) semiconductors with energy gap values of 0.847 eV, 0.683 eV, 0.556 eV, and 0.518 eV for the respective materials. It is important to note that the band gap of the perovskites reduces as a Cl − ion, two and three Cl − ions are replaced by a Br − ion, two and three Br − ions, respectively. The analysis of their projected density of states indicated that near the valence band maximum of the perovskites, Cl-3p and Br-4p states contributes the most to their total DOS. In contrast, the Ge-4p orbital is the most dominant state close to the conduction band minimum. Based on these energy gap values, the studied materials are promising candidates for lead-free perovskite solar cell devices, with TlGeBr 3 projected to be more promising than the other three materials.
摘要本研究研究了立方TlGeCl x br3 -x (x=0,1,2,3)无铅钙钛矿的结构参数和电子性能,以评估其作为钙钛矿太阳能电池器件吸收剂的潜力。利用嵌入在Quantum Espresso代码中的密度泛函理论(DFT)来计算这些性质。结果表明,该化合物对tlgecl3、tlgecl2br、tlgeclbr2和tlgebr3钙钛矿的最佳晶格常数分别为5.244 Å、5.336 Å、5.416 Å和5.501 Å。此外,化合物是直接带隙(R→R)半导体,各自材料的能带值分别为0.847 eV, 0.683 eV, 0.556 eV和0.518 eV。值得注意的是,钙钛矿的带隙随着一个Cl -离子、两个和三个Cl -离子分别被一个Br -离子、两个和三个Br -离子取代而减小。钙钛矿的投影态密度分析表明,在价带最大值附近,Cl-3p和Br-4p态对总DOS的贡献最大。相反,Ge-4p轨道是最主要的状态,接近导带最小值。基于这些能隙值,所研究的材料是无铅钙钛矿太阳能电池器件的有希望的候选材料,其中tlgebr3预计比其他三种材料更有前途。
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引用次数: 0
University Students’ Perspectives on Physics Education in Sustainable Development Goals 可持续发展目标下的大学生物理教育观
Q1 Engineering Pub Date : 2023-11-01 DOI: 10.1088/1742-6596/2623/1/012001
N Suprapto, H N Hidaayatullaah
Abstract This research explores university students’ perspectives on integrating sustainable development goals in physics education subjects (SDGs-PE). However, there is a few research that focuses on SDGs-PE. This research adopts a quantitative survey and is supported by a qualitative interview design. Fifty-two university students participated in the survey to fulfill the SDGs-PE instrument, and five interview participants for data collection. An exploratory factor analysis (EFA) and descriptive analysis were used to achieve the research’s goals. The research indicated that the SDGs-PE fulfills the criteria of validity and reliability. The construct validities of the SDGs-PE varied from .538 to .886 and explained 64.26% of the variance. Overall, the Cronbach’s alpha coefficient of the instrument was .812. This research has also highlighted the integration of physics education, education for sustainable development, and sustainable development goals.
摘要本研究探讨了大学生在物理教育学科中融入可持续发展目标(SDGs-PE)的观点。然而,有一些研究关注可持续发展目标- pe。本研究采用定量调查,并辅以定性访谈设计。52名大学生参与调查,完成SDGs-PE量表,5名访谈参与者进行数据收集。采用探索性因素分析(EFA)和描述性分析来实现研究目标。研究表明,SDGs-PE满足效度和信度标准。SDGs-PE的结构效度在0.538 ~ 0.886之间,解释了64.26%的方差。总体而言,该仪器的Cronbach’s alpha系数为0.812。本研究还强调了物理教育与可持续发展教育、可持续发展目标的融合。
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引用次数: 0
Analysis of annual power and electricity balance of hydro-thermal system in Yunnan province based on rolling dispatch with leading reservoir 基于超前水库滚动调度的云南省水热系统年电力平衡分析
Q1 Engineering Pub Date : 2023-11-01 DOI: 10.1088/1742-6596/2636/1/012035
Hongyu Pan, Zhenyu Zhao, Congtong Zhang, Kai Chen, Han Zhou, Shuangquan Liu, Qiyu Yang, Tianyu Jin
Abstract Renewable energy penetration presents challenges for power systems, including unit reconfiguration, resource allocation, and potential electricity shortage. In Yunnan Province, where hydropower is a dominant energy source, annual power and electricity imbalance is a serious issue due to insufficient hydropower regulation capacity and less scheduling flexibility. To address these problems, a rolling dispatch method is proposed to connect medium- and long-term scheduling with short-term scheduling, providing hourly start-stop statuses and output plans for units throughout the year and effectively solving power imbalance issues. Additionally, an economic benefit and electricity shortage analysis of the Longpan leading reservoir in the Jinsha River Basin is conducted, resulting in a 13 billion kWh annual power generation increase and approximately 4 billion yuan in direct economic benefits, greatly improving Yunnan Province’s adjustment ability from dry seasons to wet seasons.
可再生能源的普及给电力系统带来了单元重构、资源分配和潜在电力短缺等挑战。在以水电为主的云南省,由于水电调节能力不足,调度灵活性不高,年度电力不平衡问题十分严重。针对这些问题,提出了一种将中长期调度与短期调度相结合的滚动调度方法,提供机组全年的小时启停状态和出力计划,有效地解决了电力不平衡问题。并对金沙江流域龙盘水库进行了经济效益和缺电分析,年新增发电量130亿千瓦时,直接经济效益约40亿元,大大提高了云南省旱季到雨季的调节能力。
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引用次数: 0
Reentry trajectory design of a hypersonic vehicle based on reinforcement learning 基于强化学习的高超声速飞行器再入弹道设计
Q1 Engineering Pub Date : 2023-11-01 DOI: 10.1088/1742-6596/2633/1/012005
Partha P Das, Wang Pei, Chenxi Niu
Abstract In this research, we investigate control of a hypersonic vehicle (HV) following its reentry into the Earth’s atmosphere, using deep reinforcement learning (DRL) in a continuous space. Here, we incorporate the basic kinematic and force equations of motion for a vehicle in an atmospheric flight to formulate the reentry trajectory satisfying the boundary constraints and multiple mission related process constraints. The aerodynamic model of the vehicle emulates the properties of a common aero vehicle (CAV-H), while the atmospheric model of the Earth represents a standard model based on US Standard Atmosphere 1976, with significant simplification to the planetary model. In an unpowered flight, we then control the vehicle’s trajectory by perturbing its angle of attack and bank angle to achieve the desired objective, where the control problem is based on different actor-critic frameworks that utilize neural networks (NNs) as function approximators to select and evaluate the control actions in continuous state and action spaces. First, we train the model following each of the methods, that include on-policy proximal policy approximation (PPO) and off-policy twin delayed deterministic policy gradient (TD3). From the trajectory generated, we select a nominal trajectory for each algorithm that satisfies our mission requirements based on the reward model.
在本研究中,我们研究了在连续空间中使用深度强化学习(DRL)对高超声速飞行器(HV)再入地球大气层后的控制。在此,我们将飞行器在大气飞行中的基本运动学方程和力方程结合起来,制定了满足边界约束和多个任务相关过程约束的再入轨道。飞行器的空气动力学模型模拟了普通飞行器(CAV-H)的特性,而地球的大气模型是基于1976年美国标准大气的标准模型,对行星模型进行了显著简化。在无动力飞行中,我们通过干扰飞行器的迎角和倾斜角来控制飞行器的轨迹,以达到期望的目标,其中控制问题基于不同的行为者批评框架,该框架利用神经网络(nn)作为函数逼近器来选择和评估连续状态和动作空间中的控制动作。首先,我们按照每一种方法训练模型,包括策略上的近端策略近似(PPO)和策略外的双延迟确定性策略梯度(TD3)。从生成的轨迹中,我们根据奖励模型为每个算法选择一个满足任务要求的标称轨迹。
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引用次数: 0
Numerical simulation of ply angle deviation and thermal deformation behavior of CFRP reflector CFRP反射面铺层角偏差及热变形特性的数值模拟
Q1 Engineering Pub Date : 2023-11-01 DOI: 10.1088/1742-6596/2633/1/012012
Wenjian Jiang, Hengkun Jiang, Tonglong Huo, Yun Liang
Abstract As we know, the ply angle deviation of Carbon Fiber Reinforced Polymer(CFRP) reflector is difficult to obtain accurately in engineering applications, it will make thermal deformation of reflector unpredictable due to the discreteness of ply angle. In this paper, based on constitutive relationships between generalized internal force and strain of laminated composite, a novel ply angle deviation model based on normal distribution is proposed. Furthermore, an orthogonal test was designed and significance analysis were carried out by means of a 2.6m aperture reflector with polygonal back structure. Assumed that the ply angle deviation obeys normal distribution, a number of samples were further randomly generated, and the sample mean and standard deviation of the thermal deformation of reflector were calculated. According to χ2-test of goodness of fit, the thermal deformation of reflector still follows normal distribution. Finally, an example was employed to verify the validity and effectiveness of the proposed method. The results reach a good agreement with the experimental data, thus it is capable of providing a promising prospect for engineering practice.
摘要碳纤维增强聚合物(CFRP)反射镜的铺层角偏差在工程应用中难以准确获得,由于铺层角的离散性,会使反射镜的热变形难以预测。本文基于层合复合材料广义内力与应变的本构关系,提出了一种基于正态分布的层合角偏差模型。采用2.6m孔径多边形背结构反射镜设计正交试验并进行显著性分析。假设铺层角偏差服从正态分布,进一步随机生成若干个样本,计算反射面热变形的样本均值和标准差。经χ2拟合优度检验,反射镜热变形仍服从正态分布。最后,通过算例验证了所提方法的有效性。计算结果与实验数据吻合较好,为工程实践提供了良好的前景。
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引用次数: 0
Dynamic and Relaxation of PEG polymer Chain Segment for Phase Change Materials (PCMs) 相变材料(PCMs)中聚乙二醇聚合物链段的动态与弛豫
Q1 Engineering Pub Date : 2023-11-01 DOI: 10.1088/1742-6596/2623/1/012020
N A Fauziyah, None Sakinah, W Rachma, S Paratapa, D S Perwitasaric, P C Wardhani, E N Hidayah
Abstract This work’s most notable memory concept for next-generation novels was a reversible phase shift in a substance called phase change materials (PCMs). Here, a polyethylene glycol (PEG) polymer relaxation study employing DMA will be conducted to investigate the qualities of PCMs as superior materials. Through the method of wet mixing, PEG polymer with reinforcement made of silica was synthesized. The variation of silica xerogel was a composition of up to 20% silica xerogel. Adding silica is quite good in reducing the loss factor up to 50 MPa at the addition of 20% silica xerogel. This condition was due to the bonds formed in the polymer chain causing shrinkage and flexibility of composites. Due to the addition of silica xerogel as filler, we can study the relaxation behavior and loss factor of a material using DMA and learn more about its viscoelastic characteristics, including its capacity to absorb vibrations, resistance to impacts, and overall mechanical performance at various temperatures. Relaxation was frequently used to describe phase change materials (PCMs), especially when discussing their capacity to store thermal energy. The release or absorption of thermal energy by a PCM during its phase transition was referred to as the relaxation process.
这项工作最显著的记忆概念的下一代小说是可逆相移的物质称为相变材料(PCMs)。本文将采用DMA进行聚乙二醇(PEG)聚合物弛豫研究,以研究聚乙二醇作为优越材料的质量。通过湿法混合,合成了以二氧化硅为增强材料的聚乙二醇聚合物。变异的二氧化硅干凝胶是由高达20%的二氧化硅干凝胶组成的。添加二氧化硅可以很好地降低损失因子,在添加20%二氧化硅干凝胶时可降低到50 MPa。这种情况是由于聚合物链中形成的键引起复合材料的收缩和柔韧性。由于添加了二氧化硅凝胶作为填料,我们可以使用DMA研究材料的松弛行为和损失因子,并了解更多关于其粘弹性特性的信息,包括其吸收振动的能力,抗冲击能力以及在不同温度下的整体机械性能。弛豫经常被用来描述相变材料,特别是在讨论它们储存热能的能力时。相变过程中热能的释放或吸收称为弛豫过程。
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引用次数: 0
A Multi-timescale Scheduling Strategy for Residential Integrated Energy System 住宅综合能源系统的多时间尺度调度策略
Q1 Engineering Pub Date : 2023-11-01 DOI: 10.1088/1742-6596/2636/1/012010
Yang Gao, Siyue Lu, Longfei Ma, Jiani Zeng, Yutong Zhao, Baoqun Zhang, Hui Xu, Xiangyan Yang, Shaobin Yang
Abstract In recent years, multi-energy complementation has been deepening, and the application rate of new energy sources has been increasing. A multi-timescale optimal scheduling strategy is proposed to mobilize the energy flexibility of residential integrated energy systems (RIES) and to reduce the negative impact of source-load forecast uncertainty on the scheduling plan. Firstly, for the energy supply structure of RIES, the operation constraint model of each energy hub equipment is established. Then, the optimal scheduling is divided into three stages: day-ahead planning, intra-day planning, and real-time planning, each of which will consider the volatility of source-load prediction and determine the operation status of the equipment according to its importance level. The experimental results show that the proposed multi-timescale scheduling strategy can ensure the economy while minimizing the deviation of the main grid power purchase in the real-time and day-ahead phases, providing a basis for the development of new energy capacity in the grid to grow to higher penetration rates.
近年来,多能源互补不断深化,新能源的应用率不断提高。为了调动住宅综合能源系统的能源灵活性,减少源负荷预测不确定性对调度计划的负面影响,提出了一种多时间尺度的优化调度策略。首先,针对RIES的能源供应结构,建立了各能源枢纽设备的运行约束模型;然后,将最优调度分为日前规划、日内规划和实时规划三个阶段,每个阶段都将考虑源负荷预测的波动性,根据其重要程度确定设备的运行状态。实验结果表明,所提出的多时间尺度调度策略在保证经济性的同时,最大限度地减小了实时和日前阶段主网购电的偏差,为电网中新能源容量向更高渗透率发展提供了基础。
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引用次数: 0
A power constant logic circuit based on mask control 基于掩模控制的功率恒逻辑电路
Q1 Engineering Pub Date : 2023-11-01 DOI: 10.1088/1742-6596/2645/1/012010
Haiwei Li, Maoqun Yao, Conghui Li, Shanhu Shen
Abstract As the structure of existing anti-power attack circuits has certain security problems, this paper proposes a new mask-based control constant power logic circuit based on the existing masking technology. By integrating OR/NOR and AND/NAND circuits into a dual-rail circuit, different circuit logic functions can be controlled by inputting different masks. By introducing two parameters, Normalised Energy Deviation (NED) and Normalised Standard Deviation (NSD), the structure proposed in this paper improves the level of resistance of the circuit to power attacks to a certain extent, as well as reduces the cost of the circuit compared to other power attack resistant circuits.
摘要针对现有抗功率攻击电路的结构存在一定的安全问题,本文在现有掩模技术的基础上提出了一种新的基于掩模的控制恒功率逻辑电路。通过将OR/NOR和and /NAND电路集成到一个双轨电路中,可以通过输入不同的掩模来控制不同的电路逻辑功能。通过引入归一化能量偏差(NED)和归一化标准差(NSD)两个参数,本文提出的结构在一定程度上提高了电路对功率攻击的抵抗水平,并且与其他抗功率攻击电路相比,降低了电路的成本。
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引用次数: 0
Fisheries Water Quality Monitoring Improvement System 渔业水质监察改善系统
Q1 Engineering Pub Date : 2023-11-01 DOI: 10.1088/1742-6596/2632/1/012016
Junle Jia, Chun Luo, Zhengyi Hou, Qiqi Xia, Xuanhang Ma, Xiang Pan, Awen Ma, Yuru Zheng
Abstract In this paper, the system of dynamic identification and monitoring of water bodies and intelligent allocation of pharmaceutical discharge is designed. At present, aquaculture technology in our country is relatively traditional, and the water environment-bearing capacity will often be ignored. This paper aims to realize the efficiency of equipment in the multiple stages of aquaculture through the design system, the remote control of motion software device, and strive to combine intelligent equipment and the basic process of aquaculture, so as to make the aquaculture industry gradually upgrade. Through the test, our device can dynamically identify and detect the water body, and ensure the fishery output and water quality at the same time, bringing economic and environmental benefits to a great extent.
摘要本文设计了水体动态识别与监测及药品排放智能分配系统。目前我国的水产养殖技术比较传统,对水环境承载能力往往会被忽视。本文旨在通过设计系统、运动软件装置的远程控制,实现设备在水产养殖多个阶段的效率化,力求将智能设备与水产养殖基本流程相结合,从而使水产养殖业逐步升级。通过测试,我们的装置可以动态识别和检测水体,同时保证渔业产量和水质,在很大程度上带来经济效益和环境效益。
{"title":"Fisheries Water Quality Monitoring Improvement System","authors":"Junle Jia, Chun Luo, Zhengyi Hou, Qiqi Xia, Xuanhang Ma, Xiang Pan, Awen Ma, Yuru Zheng","doi":"10.1088/1742-6596/2632/1/012016","DOIUrl":"https://doi.org/10.1088/1742-6596/2632/1/012016","url":null,"abstract":"Abstract In this paper, the system of dynamic identification and monitoring of water bodies and intelligent allocation of pharmaceutical discharge is designed. At present, aquaculture technology in our country is relatively traditional, and the water environment-bearing capacity will often be ignored. This paper aims to realize the efficiency of equipment in the multiple stages of aquaculture through the design system, the remote control of motion software device, and strive to combine intelligent equipment and the basic process of aquaculture, so as to make the aquaculture industry gradually upgrade. Through the test, our device can dynamically identify and detect the water body, and ensure the fishery output and water quality at the same time, bringing economic and environmental benefits to a great extent.","PeriodicalId":44008,"journal":{"name":"Journal of Physics-Photonics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135716627","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
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Journal of Physics-Photonics
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