Chemical simulation teaching system based on virtual reality and gesture interaction

Background Most existing chemical experiment teaching systems lack solid immersive experiences,making it difficult to engage students.To address these challenges,we propose a chemical simulation teaching system based on virtual reality and gesture interaction.Methods The parameters of the models were obtained through actual investigation,whereby Blender and 3DS MAX were used to model and import these parameters into a physics engine.By establishing an interface for the physics engine,gesture interaction hardware,and virtual reality(VR)helmet,a highly realistic chemical experiment environment was created.Using code script logic,particle systems,as well as other systems,chemical phenomena were simulated.Furthermore,we created an online teaching platform using streaming media and databases to address the problems of distance teaching.Results The proposed system was evaluated against two mainstream products in the market.In the experiments,the proposed system outperformed the other products in terms of fidelity and practicality.Conclusions The proposed system which offers realistic simulations and practicability,can help improve the high school chemistry experimental education.

How Sense of Ritual in Tourism Impacts Tourists’Co-Creation of Tourism Experience Values:A Study Based on the Theory of Value Co-Creation

Establishing a sense of ritual within tourism consumption scenarios offers tourists the opportunity for interactive engagement.Drawing upon the value co-creation theory,this study constructed an influence mechanism model to examine tourists'active engagement in the process of co-creating tourism experience values.It employed Partial Least Squares Structural Equation Modeling(PLS-SEM)to empirically test the proposed hypotheses.The findings demonstrate that the model constructed in the present study exhibits robust reliability,validity,and explanatory power.The perception of the sense of ritual in tourism exerts a significant positive influence on tourists’co-creation of tourism experience values,thereby significantly enhancing both the communitas and flow experienced by tourists during their travels.Moreover,such communitas and flow can mediate the influence of the sense of ritual in tourism on tourists’co-creation of tourism experience values.This study contributes to advancing the current research on tourists’co-creation of tourism experience values and the sense of ritual in tourism,thereby providing theoretical foundations for cultivating a sense of ritual within tourism consumption scenarios.

Optimization of Interactive Videos Empowered the Experience of Learning Management System

The Learning management system(LMS)is now being used for uploading educational content in both distance and blended setups.LMS platform has two types of users:the educators who upload the content,and the students who have to access the content.The students,usually rely on text notes or books and video tutorials while their exams are conducted with formal methods.Formal assessments and examination criteria are ineffective with restricted learning space which makes the student tend only to read the educational contents and videos instead of interactive mode.The aim is to design an interactive LMS and examination video-based interface to cater the issues of educators and students.It is designed according to Human-computer interaction(HCI)principles to make the interactive User interface(UI)through User experience(UX).The interactive lectures in the form of annotated videos increase user engagement and improve the self-study context of users involved in LMS.The interface design defines how the design will interact with users and how the interface exchanges information.The findings show that interactive videos for LMS allow the users to have a more personalized learning experience by engaging in the educational content.The result shows a highly personalized learning experience due to the interactive video and quiz within the video.

Thermal Fluid-Solid Interaction Model and Experimental Validation for Hydrostatic Mechanical Face Seals

Hydrostatic mechanical face seals for reactor coolant pumps are very important for the safety and reliability of pressurized-water reactor power plants.More accurate models on the operating mechanism of the seals are needed to help improve their performance.The thermal fluid–solid interaction（TFSI）mechanism of the hydrostatic seal is investigated in this study.Numerical models of the flow field and seal assembly are developed.Based on the mechanism for the continuity condition of the physical quantities at the fluid–solid interface,an on-line numerical TFSI model for the hydrostatic mechanical seal is proposed using an iterative coupling method.Dynamic mesh technology is adopted to adapt to the changing boundary shape.Experiments were performed on a test rig using a full-size test seal to obtain the leakage rate as a function of the differential pressure.The effectiveness and accuracy of the TFSI model were verified by comparing the simulation results and experimental data.Using the TFSI model,the behavior of the seal is presented,including mechanical and thermal deformation,and the temperature field.The influences of the rotating speed and differential pressure of the sealing device on the temperature field,which occur widely in the actual use of the seal,are studied.This research proposes an on-line and assembly-based TFSI model for hydrostatic mechanical face seals,and the model is validated by full-sized experiments.

Did LIGO Really Detect Gravitational Waves?—The Existence of Electromagnetic Interaction Made the Experiments of LIGO Invalid

The paper proves that due to the existence of electromagnetic interaction, the experiments of LIGO cannot detect gravitational waves. This is also the reason why Weber’s experiments of gravitational waves failed. In fact, the formulas of general relativity that gravitational waves affect distances are only suitable for particles in vacuum. LIGO experiments are carried out on the earth. The laser interferometers are fixed on the steel pipes on the earth’s surface in the balanced state of electromagnetic force. Electromagnetic force is 1040 times greater than gravity. Gravitational waves are too weak to overcome electromagnetic force and change the length of steel pipes. Without considering this factor, the design principle of LIGO experiment has serious problem. The experiments to detect gravitational waves should move to space to avoid the influence of electromagnetic interaction. Besides, LIGO experiments have the following problems. 1) No explosion source of gravitational waves is really founded. 2) The argument that the Einstein’s theory of gravity is verified is a vicious circle and invalid in logic. 3) The results of experiments cause sharp contradiction for the energy currents of gravitational waves. The difference reaches to 1024 times and is unacceptable. 4) The method of numerical relativity causes great errors due to the existence of singularities. The errors are enlarged by the effect of butterfly due to the non-linearity of Einstein’s equation of gravity. 5) The so-called change of length 10-18 m between two glasses of interferometers detected in the experiment exceeds the ability of current technique. This kind of precise has entered micro-scalar. The uncertain principle of quantum mechanics makes it impossible. The signs appeared in LIGO experiments are not caused by distance change. 6) LIGO experiments have not detected gravitational waves. What detected may be the signs of disturbances coming from the middle region between two laser interferometers.

Remote Learning in Higher Education During the Pandemic: A Study of the Experiences of Chinese International Students at United Kingdom and United States Universities in 2020/21

During the COVID-19 pandemic crisis,many universities around the world made a drastic change by transferring most of their offline classes to emergency remote learning(ERL).The aim of this study was to explore how Chinese students,who studied in United Kingdom(UK)and United States(US)universities during the 2020/21 academic year,perceive their experiences of remote learning.As the UK and the US have two relatively advanced education systems,the arrangements of their universities for ERL and their support for international students are worth exploring.Moreover,during the ERL,a portion of Chinese students had online classes in their home countries instead of the country in which their universities are located.Therefore,semi-structured interviews were carried out to explore the academic experiences and social interaction of students who studied in UK and US universities,while remaining in China.The data were analyzed using the thematic analysis method.The findings showed that ERL was perceived negatively by students despite its flexibility in areas of academic learning experiences and social interaction.

A Numerical Study of the Interaction between Two Simultaneous Storms:Goni and Morakot in September 2009

Significant anomalous tracks were observed when the severe tropical storm Goni （0907） and typhoon Morakot （0908） in September 2009 were evaluated in short distances. The relationship between the two is regarded as a case of binary interaction. Based on an MM5 model （fifth=generation mesoscale model of Pennsylvania State University-National Center for Atmospheric Research）, in this study a series of sensitivity experiments were designed to determine the binary interaction between them. The sensitivity of the storm characteristics to the binary interaction was demonstrated through modeling experiments with different TC intensities and sizes based on the bogus vortices initialization. Furthermore, the contributions of large-scale environmental flow and the effects of interaction between the motions of the cyclones were distinguished by numerical experiments using only one of the TC vortices. Results from these experiments show that Morakot （0908） had a greater impact on the motion of Goni （0907）, whereas Goni （0907） had a relatively limited impact on Morakot （0908）. At the upper level, the northeasterly jet flow in the third quadrant of Morakot （0908） enhanced the upper-level divergence of Goni （0907） and had an important role in maintaining and increasing Goni＇s （0907） intensity. And at the lower level, Morakot （0908）, with strong convergence and ascending airflow, made a stable transport channel of southwesterly warm and wet flow, thus supporting the lower-level water vapor convergence of Goni （0907）. Goni （0907）, which was located upriver of the southwesterly flow, intercepted part of the water vapor transportation in the southwesterly flow, causing the water vapor convergence to strengthen while the water vapor convergence of Morakot （0908） weakened.

Investigation of Wave-Structure Interaction Using State of the Art CFD Techniques

The suitability of computational fluid dynamics (CFD) for marine renewable energy research and development and in particular for simulating extreme wave interaction with a wave energy converter (WEC) is considered. Fully nonlinear time domain CFD is often considered to be an expensive and computationally intensive option for marine hydrodynamics and frequency-based methods are traditionally preferred by the industry. However, CFD models capture more of the physics of wave-structure interaction, and whereas traditional frequency domain approaches are restricted to linear motions, fully nonlinear CFD can simulate wave breaking and overtopping. Furthermore, with continuing advances in computing power and speed and the development of new algorithms for CFD, it is becoming a more popular option for design applications in the marine environment. In this work, different CFD approaches of increasing novelty are assessed: two commercial CFD packages incorporating recent advances in high resolution free surface flow simulation;a finite volume based Euler equation model with a shock capturing technique for the free surface;and meshless Smoothed Particle Hydrodynamics (SPH) method. These different approaches to fully nonlinear time domain simulation of free surface flow and wave structure interaction are applied to test cases of increasing complexity and the results compared with experimental data. Results are presented for regular wave interaction with a fixed horizontal cylinder, wave generation by a cone in driven vertical motion at the free surface and extreme wave interaction with a bobbing float (The Manchester Bobber WEC). The numerical results generally show good agreement with the physical experiments and simulate the wave-structure interaction and wave loading satisfactorily. The grid-based methods are shown to be generally less able than the meshless SPH to capture jet formation at the face of the cone, the resolution of the jet being grid dependent.

Research on Interactive Simulation Experiment Platform and Remote Simulation System Under Web Environment

This paper brings forward a method of experimental teaching reform of universities and colleges,which establishes an interactive simulation experiment platform with MATLAB simulation software.The platform uses visual man-machine interface,which avoids a lot of programming and debugging work,and improves students’learning enthusiasm.Simultaneously,it implements remote simulation based on JAVA under web environment,which is convenient for network teaching,and improves flexibility and practicability of the simulation experiment platform.

Designing interactive glazing through an engineering psychology approach:Six augmented reality scenarios that envision future car human-machine interface

Background With an increasing number of vehicles becoming autonomous,intelligent,and connected,paying attention to the future usage of car human-machine interface with these vehicles should become more relevant.Several studies have addressed car HMI but were less attentive to designing and implementing interactive glazing for every day(autonomous)driving contexts.Methods Reflecting on the literature,we describe an engineering psychology practice and the design of six novel future user scenarios,which envision the application of a specific set of augmented reality(AR)support user interactions.Additionally,we conduct evaluations on specific scenarios and experiential prototypes,which reveal that these AR scenarios aid the target user groups in experiencing a new type of interaction.The overall evaluation is positive with valuable assessment results and suggestions.Conclusions This study can interest applied psychology educators who aspire to teach how AR can be operationalized in a human-centered design process to students with minimal pre-existing expertise or minimal scientific knowledge in engineering psychology.

交互叙事视角下智慧博物馆沉浸式体验设计研究

目的在交互叙事视角下,研究城市智慧博物馆的沉浸式体验设计方法及设计实践。方法通过案例研究等方法分析智慧博物馆交互叙述的构成要素和特点,进一步探索交互叙事与智慧博物馆沉浸式体验的关系,从构建跨数字媒介的多感官沉浸体验、重构交互叙事要素与关联叙事内容、营造情境感知的叙事空间与互动式故事体验三个方面提出基于交互叙事的智慧博物馆沉浸式体验设计方法,并设计基于交互叙事的智慧博物馆沉浸式体验设计的流程,从实践良渚博物馆沉浸体验项目的角度验证方法的可行性和有效性。结论设计者通过编码叙事空间和叙事内容,运用跨数字媒介助力多感官沉浸,提取智慧博物馆文化作为叙事主题,优化沉浸交互体验空间,使参观者超越时空限制,与所在城市的历史脉络和文化内涵进行深度互动,从而对城市文化产生更强烈的认同。

用户体验视角下的文创产品互动设计研究

目的 基于用户体验视角探究文创产品的设计,尤其是探索文创产品的互动性设计策略,以优化文创设计,创造能更符合用户需求、更好地满足用户体验的产品。方法 采用文献资料法对当前用户体验视角下的文创产品研究现状展开研究,并采用案例法进一步了解基于用户体验的文创设计成功案例,为设计提供参考。结论 用户体验包括感官体验、行为体验、情感体验、思考体验和关联体验,文创产品设计应该关注用户体验,设计符合用户需求的、具有互动性的文创产品。

数智背景下的信息交互与服务发展

[目的/意义]随着数字智能技术的应用拓展,面向用户的智能交互、多模态信息融合和数字空间活动的延伸,对数字信息资源组织、面向交互认知的描述和深层次服务的开展提出了新的要求。如何有效解决数字智能背景下信息交互与服务的深层次发展问题成为亟待探讨的议题。[方法/过程]文章在分析数字智能环境形成及其对信息交互与服务影响的基础上,研究面向用户的智能交互与体验设计,以及基于智能交互的生成式人工智能的发展与安全保障。[结果/结论]在面向用户的信息服务组织中,应立足于数字智能环境的形成及其影响,寻求与智能环境相适应的服务组织模式和数字智能驱动下的服务组织方式。数字服务中以用户为中心的智能交互,在于充分理解用户的意图,融合用户视觉、听觉等交互通道,为智能化服务开展提供支持。同时针对快速发展的生成式人工智能,既要应对其带来的安全威胁,也要正确合理地确保生成式人工智能安全落地,保障生成式人工智能系统的安全。

基于NXMCD的虚实映射实验交互系统设计与实践

该文基于数字孪生理念,结合NX MCD机电概念设计、PLC编程与控制和LabVIEW的图形化编程手段,完成了基于NX MCD的虚实映射实验交互系统设计与实践。以LabVIEW设计的UI界面为控制监测端,物理对象与MCD虚拟模型为执行端,实现了物理对象与MCD虚拟模型的虚实映射,同时MCD虚拟模型能够输出控制信号进而控制物理对象。在此基础上,设计了步进电机往复运动与MCD虚拟模型虚实映射实验案例。该实验案例可为本科生和研究生相关课程的实践教学提供虚实映射交互实验方法和手段,可显著提升学生的创新实践能力与水平,是对数字化实践教学研究的一次探索。

智能交通场景下的交互导识设计原则

目的探索智能交通场景下交互导识设计的原则,研究如何灵活应用多模态技术和交互设计方法,提升导识系统的效率和适应性,进而改善用户的出行体验。方法通过文献综述和案例分析,详细梳理和总结了交互导识设计在实际应用中的主要发展趋势、存在问题及设计师面临的挑战。结果研究显示,目前的交互导识出现了多通道应用、多终端融合,以及多样化的模式,这些变化使导识设计超越了传统静态和分散的形式,呈现出由多种维度支持的复合形态,进而要求设计师重新审视这一复杂的设计对象,调整设计原则以适应新的需求。结论提出了适用于智能交通环境下的交互导识设计原则和设计建议,包括建立更系统化的导识信息、打造一致性的用户体验和提供丰富的信息形态。

智能时代下的交互导识设计研究综述

目的深入探讨智能时代背景下交互导识设计的重要性和未来的发展趋势,提升个体对复杂信息环境的判断能力,引导用户在复杂且无序的信息环境中探寻解决问题的途径,为用户提供直观且易操作的工具和模式,以实现更加安全、便利、高效、舒适的用户体验。方法通过文献研究与归纳,梳理导识设计的发展来由,对比分析国内外研究学者对导识设计概念的理解与辨析,结合现状与信息交互方式和先进技术的发展趋势,提出交互导识设计的概念并对其蕴含的价值与应用范围进行全面论述。结论交互导识设计坚持以用户为中心的设计方向,实现用户体验的升级、导识信息的有效传递。在智能时代背景下,其专业价值主要体现在理论创新与知识扩展、技术创新与实践应用、用户体验深入研究、社会文化与伦理考量,以及经济与产业影响五大维度上。这项研究不仅丰富了设计学术理论的深度和广度,也为相关行业的设计实践提供创新思路与应用策略方向。

互联网产品设计中用户体验与交互设计优化对策

目的探寻互联网产品设计中用户体验与交互设计优化对策,从而设计出更符合用户需求和用户体验的互联网产品。方法采用概念分析法,对互联网产品设计中的用户体验与交互设计分别展开研究,提出要遵循用户体验设计的一致性以及用户体验设计的个性化,并提出在交互设计中应使界面与用户感知习惯契合,易于被用户感知,帮助用户形成长时记忆,唤醒用户记忆,关注用户情绪与情感,使其产生愉悦的体验感。结论作为产品创新与开拓的基础,用户体验与交互设计从深层次发掘用户的切实需求与体验,进而有利于互联网产品的推广。

沉浸式体验视角下竹文化数字展示设计策略研究

【目的】该研究旨在探讨数字化手段在竹文化展示与传播中的运用,以迎合现代观众对沉浸式展览体验的追求。【方法】研究采用了文献回顾、比较分析和案例研究的方法,将数字化展览的沉浸式体验设计细分为观众、信息和空间3个维度,并研究了如何通过高沉浸性、强交互性和多感官参与来实现丰富的展示效果。【结果】基于观众的感官、认知和情感沉浸需求,以及竹文化展示的3个类别(场景、信息、技艺),该文提出了空间沉浸、融媒沉浸和参与沉浸等数字展示设计策略和技术路径,并在浙江农林大学竹韵棠的数字化展示更新设计项目中得到了应用,以验证数字沉浸的潜力。【结论】该研究不仅为竹文化的创新展示提供了技术性的解决方案,而且为传统文化数字化展示设计的创新探索提供了重要的参考和启示。

工程图学虚拟仿真模型系统设计及其教学分析

针对工科类专业工程测绘课程实验需求,基于云服务、虚拟模型技术和可视化仿真体验,开发了工程测绘虚拟仿真实验系统。该系统对工程测绘实验方案、互动环节和考核评价等内容的教学体系重构和数字化重建,以测绘对象三维建模代替零部件实物,降低实验教学成本投入;以虚拟实验室代替实际测绘实验室,减少实验室资源占用;以在线实验代替固定时间课内实验,提高课程教学灵活度。为校内外师生提供灵活交互、强沉浸感和高用户黏度的在线实验教学服务,驱动学生自主完成实验学习和在线互动等活动,从而使学生的空间思维、图感表达能力得到充分训练,有效提高学生的工程创新素质。