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Modal analysis of taipei 101 building 台北 101 大楼的模态分析
Pub Date : 2024-07-26 DOI: 10.54254/2755-2721/78/20240402
Hao Wang, Kehan Sun, Jierui Cao, Qianrui Zhang, Menglin Liang
In this paper, a multi-stage modeling and simulation approach incorporating different deformation conditions is used to analyze the structure of the Taipei 101 building. The modeling process mainly involves the formation of an initial simplified model based on the basic geometry, the determination of an accurate model based on the actual dimensions, and finally the introduction of a hollow structure design to mimic the density and mass distribution of the real building. After the model is established, mesh creation and mesh independence study are carried out. The simulation is carried out using Ansys software, which mainly performs the process of selecting boundary conditions, determining the equivalent density, dividing the mesh for modal analysis, and obtaining the modal vibration pattern as well as the corresponding intrinsic frequency. By analyzing the intrinsic frequencies and vibration modes, the structure of Taipei 101 Building is prone to resonance under certain circumstances, and this study provides some significance to the geology of local seismic activities.
本文采用结合不同变形条件的多阶段建模和模拟方法来分析台北 101 大楼的结构。建模过程主要包括根据基本几何形状形成初始简化模型,根据实际尺寸确定精确模型,最后引入中空结构设计以模拟真实建筑的密度和质量分布。模型建立后,进行了网格创建和网格独立性研究。仿真使用 Ansys 软件进行,主要完成选择边界条件、确定等效密度、划分网格进行模态分析、获得模态振型以及相应的固有频率等过程。通过对本征频率和振动模式的分析,台北 101 大楼的结构在特定情况下容易产生共振,本研究对当地地震活动地质具有一定的借鉴意义。
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引用次数: 0
Optimizing delay and energy in 4-bit absolute-value detector circuits: A balancing act 优化 4 位绝对值检测器电路中的延迟和能量:平衡之术
Pub Date : 2024-07-26 DOI: 10.54254/2755-2721/78/20240484
Yuhan Zheng
This research focuses on optimizing the 4-bit absolute-value detector circuit. This paper firstly introduces the basic theory of the circuit as the foundation of the analysis. It contains the function, logic and the theories which are used in the design. Secondly, this paper optimizes the circuit from two perspective, which are the delay and the energy. This research aims to find the relation between these two factors. Furthermore, because the delay and the energy are both critical to the performance of the circuit, and the conditions that determine one of the two factors also affect the other, this research also attempts to find a balance point which can optimize them as much as possible. In the end, this paper summarizes the result about the optimization and analyses the deficiencies of the experiment methods. This paper also gives suggestions about the perspective that the further studies can focus on in order to optimize the 4-bit absolute-value detector in a deeper degree.
本研究的重点是优化 4 位绝对值检测器电路。本文首先介绍了电路的基本理论,作为分析的基础。它包括功能、逻辑和设计中使用的理论。其次,本文从延迟和能量两个角度对电路进行了优化。本研究旨在找出这两个因素之间的关系。此外,由于延迟和能量对电路性能都至关重要,而决定其中一个因素的条件也会影响另一个因素,因此本研究还试图找到一个平衡点,尽可能优化这两个因素。最后,本文总结了优化结果,分析了实验方法的不足之处。本文还从进一步研究的角度提出了建议,以便更深入地优化 4 位绝对值检测器。
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引用次数: 0
Designofhighperformancealuminum-airbatterybasedoncheapnon-preciousmetalcathodes 基于廉价非贵金属阴极的高性能铝空气电池设计
Pub Date : 2024-07-26 DOI: 10.54254/2755-2721/72/20240991
Jingyu Hu
With the rapid development of areas such as mobile electronic devices and electric vehicles, environmental problems and energy problems have become increasingly prominent. Therefore, it is particularly important to develop green, safe, efficient, cheap, sustainable energy storage and large-scale application of energy storage devices. Aluminum-air battery is a device that converts the chemical energy of anode aluminum directly into electric energy through electrochemical reaction. The theoretical voltage of aluminum-air battery is high (2.75 V), large specific capacity (2.98 Ah/g), high specific energy (8.1 Wh/g), and metal aluminum is a high strength energy carrier, has the advantages of rich resources, low price, environment friendly, perfectly matching the current situation of power supply requirements. However, the existing aluminum-air batteries face the economic problem of high cost, due to the slow oxygen reduction reaction dynamics of the cathode and the use of the expensive precious metal Pt/C as a catalyst. In order to reduce the cost of aluminum-air batteries, this paper plans to use the cheap non-precious metal nano carbon materials as the cathode catalyst, and flexibly use the structural design to construct the structure of the aluminum-air battery with double cathodes, which effectively increases the cathode reaction area. In this paper, the discharge performance was studied by experimental method, and its peak power is 1.42 times that of the traditional single cathode battery, which has good catalytic performance and stability, and shows that the non-precious metal double-cathode structure battery is both practical and economical.
随着移动电子设备和电动汽车等领域的快速发展,环境问题和能源问题日益突出。因此,开发绿色、安全、高效、廉价、可持续的储能和大规模应用的储能装置显得尤为重要。铝空气电池是一种通过电化学反应将正极铝的化学能直接转化为电能的装置。铝空气电池理论电压高(2.75 V)、比容量大(2.98 Ah/g)、比能量高(8.1 Wh/g),且金属铝是一种高强度的能量载体,具有资源丰富、价格低廉、环境友好等优点,完全符合当前形势下的供电要求。然而,由于正极氧还原反应动力学缓慢,且使用昂贵的贵金属 Pt/C 作为催化剂,现有的铝空气电池面临着成本高昂的经济问题。为了降低铝空气电池的成本,本文计划采用廉价的非贵金属纳米碳材料作为阴极催化剂,并灵活运用结构设计构建双阴极铝空气电池结构,有效增加了阴极反应面积。本文通过实验方法对其放电性能进行了研究,其峰值功率是传统单阴极电池的1.42倍,具有良好的催化性能和稳定性,表明非贵金属双阴极结构电池既实用又经济。
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引用次数: 0
The synthesis of multi-level porous MOF composite materials with different MOF contents 不同 MOF 含量的多级多孔 MOF 复合材料的合成
Pub Date : 2024-07-26 DOI: 10.54254/2755-2721/72/20240979
Boou Li, Xiaojie Ma
To address the inherent limitations of current MOF synthesis, where pore size is restricted to micropores or small mesopores, we successfully synthesized MOF composite materials with well-developed porous structures using a self-template approach. These pores encompass not only the intrinsic micropores or small mesopores of MOFs but also the template-induced large pores. During the experimental process, we achieved the synthesis of composite materials with varying MOF contents by modifying experimental conditions. Through this design, we not only achieved selective adsorption of guest molecules but also significantly increased the porosity, thereby enhancing the mass transfer efficiency of guest molecules and the utilization rate of materials. This research breakthrough offers new insights and solutions for addressing critical issues in fields such as gas separation, energy storage, and catalysis.
针对目前 MOF 合成中孔隙大小仅限于微孔或小介孔的固有局限性,我们采用自模板法成功合成了具有发达多孔结构的 MOF 复合材料。这些孔隙不仅包括 MOF 固有的微孔或小介孔,还包括模板诱导的大孔隙。在实验过程中,我们通过改变实验条件实现了不同 MOF 含量复合材料的合成。通过这种设计,我们不仅实现了客体分子的选择性吸附,还显著增加了孔隙率,从而提高了客体分子的传质效率和材料的利用率。这一研究突破为解决气体分离、能量存储和催化等领域的关键问题提供了新的见解和解决方案。
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引用次数: 0
A review of locomotion of snake robots 蛇形机器人运动回顾
Pub Date : 2024-07-26 DOI: 10.54254/2755-2721/78/20240420
Pu Huang, Wenyue Huang
In this review paper, we demonstrate the high structural flexibility and motion diversity of snake robots, which are important indicators to measure the performance of the mechanism. And animals in nature, especially reptiles, often have a high degree of flexibility and a variety of modes of movement in order to be able to shift through various terrains. Thus, making a robot with excellent performance, a bionic robot is a suitable choice. Currently, we have reviewed the state of the act in the snake-like machine. In the end, we conclude that with the simplicity of design and practice, it can be designed easily with unique constructures to complete modes of locomotion. Furthermore, we also provide the perspectives of future work.
在这篇综述论文中,我们展示了蛇形机器人的高度结构灵活性和运动多样性,这是衡量机构性能的重要指标。而自然界中的动物,尤其是爬行类动物,为了能够在各种地形中转换,往往具有高度的灵活性和多种运动模式。因此,制作性能优良的机器人,仿生机器人是一个合适的选择。目前,我们已经回顾了蛇形机器的发展状况。最后,我们得出结论:通过简单的设计和实践,可以轻松设计出具有独特结构的仿生机器人,从而完成各种运动模式。此外,我们还对未来的工作进行了展望。
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引用次数: 0
Finite element solution of heat conduction in complex 3D geometries 复杂三维几何图形中热传导的有限元解决方案
Pub Date : 2024-07-26 DOI: 10.54254/2755-2721/78/20240418
Quanjian Wen
This paper presents the use of the finite element method (FEM) to solve heat conduction problems in complex 3-dimensional geometries not amenable to analytical solutions. Heat conduction is important across engineering domains, but closed-form solutions only exist for basic shapes. For intricate real-world component geometries, numerical techniques like FEM must be applied. The paper outlines the mathematical formulation of FEM, starting from the heat conduction governing equations. The domain is discretized into a mesh of interconnected finite elements. Element equations are derived and assembled into a global matrix system relating nodal temperatures. Boundary conditions are imposed and the matrix equations solved to find the temperature distribution. An example problem analyzes steady state conduction in an L-shaped block with 90-degree corners and surface convection. Results show FEM can capture localized gradients and discontinuities difficult to model otherwise. Detailed temperature contours provide insight. FEM enables robust thermal simulation of complex 3D geometries with localized effects, expanding analysis capabilities beyond basic analytical shapes. Proper application of FEM is critical for accurate results.
本文介绍了如何使用有限元法(FEM)来解决复杂三维几何形状中的热传导问题。热传导在各个工程领域都很重要,但闭式解法只适用于基本形状。对于复杂的实际组件几何形状,必须应用有限元等数值技术。本文从热传导控制方程出发,概述了有限元的数学表达式。域被离散化为相互连接的有限元网格。推导出元素方程,并将其组合成与节点温度相关的全局矩阵系统。施加边界条件并求解矩阵方程,以找到温度分布。示例问题分析了具有 90 度角和表面对流的 L 形块中的稳态传导。结果表明,有限元模型可以捕捉局部梯度和其他模型难以模拟的不连续性。详细的温度等值线提供了洞察力。有限元可以对具有局部效应的复杂三维几何体进行可靠的热模拟,从而将分析能力扩展到基本分析形状之外。正确应用有限元是获得准确结果的关键。
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引用次数: 0
Modal analysis of Shanghai world financial center based on using ANSYS 基于 ANSYS 的上海环球金融中心模态分析
Pub Date : 2024-07-26 DOI: 10.54254/2755-2721/78/20240403
Bowen You, Zhijie Shen, Yizhao Wang, Enze Li, Zhe Yu
This study delves into the resonance phenomena within the complex structure of the Shanghai Global Financial Center. By utilizing ANSYS simulations, we can accurately predict the vibration patterns and magnitudes exhibited by the building under various conditions. These resonance phenomena have the potential to significantly impact the buildings stability, occupant comfort, and overall structural integrity. This research conducts a thorough analysis of the self-resonance conditions of the Shanghai Global Financial Center through the application of ANSYS software. The study successfully identifies resonance frequencies and provides a deeper understanding of resonance mechanisms. These findings offer valuable insights for comprehending and mitigating resonance-related issues. Moreover, they hold great significance for the design and engineering of super-tall skyscrapers, offering essential guidance to ensure their safety and performance. AMSS_0403rchitects and engineers can use this knowledge to optimize the design and construction of such impressive structures, ultimately contributing to the advancement of tall building technology. Enze Li and Zhe Yu are dedicated to data collection, Bowen You and Yizhao Wang specialize in modeling and data recording and analysis, while Zhijie Shen and Enze Li are responsible for carefully crafting and refining the paper.
本研究深入探讨了上海环球金融中心复杂结构中的共振现象。通过 ANSYS 仿真,我们可以准确预测大楼在各种条件下的振动模式和振动幅度。这些共振现象有可能对建筑的稳定性、居住舒适度和整体结构完整性产生重大影响。本研究应用 ANSYS 软件对上海环球金融中心的自共振情况进行了全面分析。研究成功确定了共振频率,并对共振机理有了更深入的了解。这些发现为理解和缓解共振相关问题提供了宝贵的见解。此外,它们对超高摩天大楼的设计和工程具有重要意义,为确保其安全和性能提供了必要的指导。AMSS_0403建筑师和工程师可以利用这些知识优化此类令人印象深刻的结构的设计和建造,最终促进高层建筑技术的进步。李恩泽和于哲致力于数据收集,尤博文和王一钊专门负责建模和数据记录与分析,而沈志杰和李恩泽则负责精心撰写和完善论文。
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引用次数: 0
Solution to SRAM static power consumption with MTCMOS 利用 MTCMOS 解决 SRAM 静态功耗问题
Pub Date : 2024-07-26 DOI: 10.54254/2755-2721/78/20240434
Jiyao Yuan, Xiaochuan Xue
The rapid growth of mobile devices has led to an increasing demand for battery life and energy efficiency in recent years, the reduction of circuit power consumption has become extremely crucial. SRAM has become an indispensable component of modern System-on-Chip (SoC) designs, and reducing its power consumption holds significant importance in minimizing overall chip power consumption. On the other hand, as manufacturing processes advance, static power consumption resulting from leakage currents has gradually emerged as a primary source of power consumption. This paper analyzes the power composition of SRAM, provides a detailed explanation of the principles and influencing factors of MTCMOS design technology, and conducts modeling analysis on 6T SRAM based on MTCMOS. In the modeling analysis, we compare the leakage current and static power reduction effects of 6T SRAM using four different process technologies: 28nm, 40nm, 65nm, and 90nm. From the data, it can be observed that MTCMOS has a notable effect in reducing leakage current for 6T SRAM across various process technologies. Comparing 6T SRAM of different process technologies, we can roughly see that the power reduction effect reaches a peak and gradually decreases. However, due to the lack of more advanced process libraries, we cannot further validate whether this inference is accurate.
近年来,移动设备的快速发展导致对电池寿命和能效的要求越来越高,降低电路功耗变得极为重要。SRAM 已成为现代片上系统(SoC)设计中不可或缺的组件,降低其功耗对于最大限度地减少整体芯片功耗具有重要意义。另一方面,随着制造工艺的进步,漏电流产生的静态功耗逐渐成为功耗的主要来源。本文分析了 SRAM 的功耗构成,详细阐述了 MTCMOS 设计技术的原理和影响因素,并对基于 MTCMOS 的 6T SRAM 进行了建模分析。在建模分析中,我们比较了采用 28 纳米、40 纳米、65 纳米和 90 纳米四种不同工艺技术的 6T SRAM 的漏电流和静态功耗降低效果。从数据中可以看出,MTCMOS 在降低不同工艺技术的 6T SRAM 泄漏电流方面效果显著。比较不同工艺技术的 6T SRAM,我们可以大致看出功耗降低效果达到峰值后逐渐降低。不过,由于缺乏更先进的工艺库,我们无法进一步验证这一推论是否准确。
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引用次数: 0
Research on integrating hydrogen energy storage with solar and wind power for Net-Zero energy buildings 研究如何将氢能储存与太阳能和风能结合起来,实现净零能耗建筑
Pub Date : 2024-07-26 DOI: 10.54254/2755-2721/70/20241008
Taojun Sun
Net Zero Energy Buildings (NZEBs) are evolving as a pillar concept as it fits in with the global Net Zero Energy Target strategy and the decarbonisation strategy of the building sector, which has been developed in response to climate change. The shift from existing building types to Net Zero Energy Buildings is a predominant trend. Net Zero Energy Buildings. This review paper explores the use of solar and wind energy as new sources of energy to generate electricity and hydrogen to store electricity as revolutionary solutions to achieve Net Zero Energy Buildings. It provides insights into the technological advances and challenges associated with hydrogen energy systems, including electrolyser efficiency, storage solution resolution, and fuel cell innovation. In addition, the paper highlights the key role of hydrogen in addressing the intermittency of renewable energy generation and enhancing the resilience and sustainability of Net Zero Energy Buildings systems. The potential for scaling up and commercialising hydrogen storage in the building sector is assessed through a detailed examination of current technologies, performance evaluations, and case studies. Despite facing a number of barriers from technical, economic, and policy perspectives, this paper argues that hydrogen storage can make a significant contribution to the decarbonisation of the built environment through continued technological innovation and framework improvement.
净零能耗建筑(NZEBs)作为一个支柱性概念正在不断发展,因为它符合全球净零能耗目标战略和建筑领域的去碳化战略,而这一战略是为应对气候变化而制定的。从现有建筑类型向净零能耗建筑转变是一个主要趋势。净零能耗建筑。本综述文件探讨了利用太阳能和风能作为新能源发电以及利用氢气储存电力作为实现净零能耗建筑的革命性解决方案。它深入探讨了与氢能系统相关的技术进步和挑战,包括电解槽的效率、存储解决方案的分辨率以及燃料电池的创新。此外,论文还强调了氢能在解决可再生能源发电的间歇性以及提高净零能耗建筑系统的复原力和可持续性方面的关键作用。通过对当前技术、性能评估和案例研究的详细研究,评估了在建筑领域扩大氢储存规模并实现商业化的潜力。尽管在技术、经济和政策方面面临诸多障碍,但本文认为,通过持续的技术创新和框架改进,氢存储可以为建筑环境的去碳化做出重大贡献。
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引用次数: 0
Maximizing project efficiency and collaboration in construction management through building information modeling (BIM) 通过建筑信息模型 (BIM) 最大限度地提高项目效率,加强施工管理协作
Pub Date : 2024-07-26 DOI: 10.54254/2755-2721/72/20240986
Zihan Mi, Jiaxin Li
Building Information Modeling (BIM) represents a transformative approach in construction management, significantly enhancing project efficiency, stakeholder collaboration, and economic performance. This paper examines the integration of BIM across different phases of the construction project lifecycle, including pre-construction planning, resource allocation, and risk management. Utilizing quantitative analyses and empirical data, we explore how BIM facilitates precise planning, optimizes resource usage, and proactively manages project risks. Furthermore, the paper discusses BIMs pivotal role in improving stakeholder communication, coordinating workflows, and enhancing decision-making processes. By detailing BIMs impact on cost reduction, time savings, and return on investment, the study highlights its capacity to drive financial performance and stakeholder satisfaction in construction projects. The findings suggest that BIM not only streamlines project management but also significantly boosts profitability and efficiency.
建筑信息模型(BIM)是建筑管理领域的一种变革性方法,可显著提高项目效率、利益相关者协作和经济效益。本文探讨了 BIM 在建筑项目生命周期不同阶段的整合,包括施工前规划、资源分配和风险管理。利用定量分析和经验数据,我们探讨了 BIM 如何促进精确规划、优化资源使用和主动管理项目风险。此外,本文还讨论了 BIM 在改善利益相关者沟通、协调工作流程和加强决策过程中的关键作用。通过详细介绍 BIM 对降低成本、节省时间和投资回报的影响,研究强调了 BIM 在推动建筑项目的财务绩效和利益相关者满意度方面的能力。研究结果表明,BIM 不仅能简化项目管理,还能显著提高盈利能力和效率。
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引用次数: 0
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Applied and Computational Engineering
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