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基于flutter的中老年智慧生活APP软件设计与实现

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现代信息科技 2024年第3期8卷 27-30,36页

作者：董雪莲王华慧陈家乐南华大学湖南衡阳421001

当前,中国的人口老龄化仍呈上升趋势,中老年人越来越频繁地使用手机和家电,容易出现困惑和忘记操作步骤的情况。基于此,文章基于flutterUI框架、使用SpringBoot作为后台开发框架来开发了一款跨平台APP软件“步步有伴”,其中整个APP采用M... 详细信息

当前,中国的人口老龄化仍呈上升趋势,中老年人越来越频繁地使用手机和家电,容易出现困惑和忘记操作步骤的情况。基于此,文章基于flutterUI框架、使用SpringBoot作为后台开发框架来开发了一款跨平台APP软件“步步有伴”,其中整个APP采用MVVM架构,后端程序采用MVC架构。开发的目标是帮助中老年人更好地了解和使用这些设备,提高生活质量。开发结果表明,软件可以帮助中老年人更好地管理自己的日常事务,并且帮助子女可以随时随地了解父母的待办事项和提醒事项,并及时提供帮助和支持。

关键词： flutter MVVM APP

基于flutter的今日早饭App功能设计与开发

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电脑知识与技术 2024年第4期20卷 70-73,76页

作者：谢婉琴西安石油大学陕西西安710000

当今中国社会正在飞速地向前发展,在这个信息化时代,由于人们对科技的热爱以及科技的发展,智能手机的发展趋势势不可挡,由此也促使了很多美食App的出现。该设计是基于Androidflutter移动平台美食菜谱系统来进行分析和设计的,设计一款早... 详细信息

当今中国社会正在飞速地向前发展,在这个信息化时代,由于人们对科技的热爱以及科技的发展,智能手机的发展趋势势不可挡,由此也促使了很多美食App的出现。该设计是基于Androidflutter移动平台美食菜谱系统来进行分析和设计的,设计一款早饭App,用户通过手机软件可以获得美食具体的菜谱信息、进行线上分享、获取流行菜谱等。文章简要介绍了App的功能以及实现方法,先对整个项目进行总体设计,对一些框架和界面进行整体的基本搭建,然后具体介绍每个模块,每个界面都有一定的功能,使读者了解基于flutter的美食App设计与开发的一个流程,界面的清晰展示以及流畅的跳转,给用户操作带来一个更好的视觉体验,再配合一些好的组件或者框架,使项目更加完善,更好服务于客户。

关键词： flutter 早饭App Android

基于flutter的智能场景记账APP的设计与实现

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现代计算机 2024年第10期30卷 117-120页

作者：胡洁朱磊杨子腾刘星沂南华大学计算机学院衡阳421001

综合了市面上记账类APP的功能并根据当下用户的一些需求设计了一款满足个人财务管理需求的同时基于智能记账且便捷、简单好用的记账APP,并通过flutter搭建前端,Spring Boot搭建后端和MySQL数据库实现了这款智能场景记账APP,同时也将其... 详细信息

综合了市面上记账类APP的功能并根据当下用户的一些需求设计了一款满足个人财务管理需求的同时基于智能记账且便捷、简单好用的记账APP,并通过flutter搭建前端,Spring Boot搭建后端和MySQL数据库实现了这款智能场景记账APP,同时也将其部署在了服务器上。

关键词：智能记账 APP软件 OCR智能文字识别 flutter Spring Boot

基于Vue和flutter的经验库设计与实现

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电脑知识与技术 2024年第21期20卷 40-42页

作者：陈炯王国锋冯鹏超吉利汽车研究院(宁波)有限公司浙江宁波315300

随着全球汽车工业的持续繁荣与快速发展,车辆设计和生产过程中的碰撞安全性能已成为评估车辆整体安全性的重要指标之一,其研究和优化显得尤为重要。然而,在车辆碰撞试验过程中积累的大量经验知识如何有效进行管理和共享,成为提升车辆安... 详细信息

随着全球汽车工业的持续繁荣与快速发展,车辆设计和生产过程中的碰撞安全性能已成为评估车辆整体安全性的重要指标之一,其研究和优化显得尤为重要。然而,在车辆碰撞试验过程中积累的大量经验知识如何有效进行管理和共享,成为提升车辆安全性能的关键挑战。为应对这一挑战,文章深入研究了车辆碰撞试验过程中的经验知识管理需求,设计并实现了一个基于Vue和flutter技术的经验库平台,为车辆碰撞试验过程中的经验知识提供全面、高效的管理和共享机制。该平台通过Vue开发网页端经验管理页面,提供丰富的数据展示和交互功能;同时,利用flutter框架开发移动端应用,支持问题发布与解决方案的快速更新^([1])。

关键词： Vue flutter 车辆碰撞安全经验库移动端应用

flutter and Thermal Buckling Properties and Active Control of Functionally Graded Piezoelectric Material Plate in Supersonic Airflow

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Acta Mechanica Solida Sinica 2020年第5期33卷 692-706页

作者： Yu Xue Jinqiang Li Fengming Li Zhiguang Song College of Aerospace and Civil Engineering Harbin Engineering UniversityHarbin150001China

This paper is devoted to investigate the flutter and thermal buckling properties of the functionally graded piezoelectric material(FGPM)plate in supersonic airflow,and the active flutter control is carried out under different temperature *** piezoelectric material component of the FGPM plate has gradient changes along the thickness,such as piezoelectricity and dielectric *** supersonic piston theory is used to evaluate the aerodynamic *** on the first-order shear deformation theory and Hamilton’s principle with the assumed mode method,the equation of motion of the structural system is *** effect of aerodynamic pressure on the frequency and damping ratio of the FGPM plate is ***,the flutter and thermal buckling properties of the FGPM and pure metal plates are compared to show the superior aerothermoelastic properties of the FGPM *** influences of volume fraction exponent and temperature on the flutter and thermal buckling properties of the FGPM plate are also examined in *** LQR controller is adopted to achieve active flutter *** simulation results show that the present control method can largely improve dynamic stability of the FGPM plate in supersonic airflow and high-temperature environment.

关键词： Functionally graded piezoelectric material flutter Thermal buckling Active control

flutter analysis of hybrid metal-composite low aspect ratio trapezoidal wings in supersonic flow

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Chinese Journal of Aeronautics 2017年第1期30卷 196-203页

作者： Shokrollahi Saeed Shafaghat Salman Department of Aerospace Engineering Malek Ashtar University of Technology

An effective 3D supersonic Mach box approach in combination with non-classical hybrid metal-composite plate theory has been used to investigate flutter boundaries of trapezoidal low aspect ratio wings. The wing structure is composed of two main components including aluminum material（in-board section） and laminated composite material（out-board section）. A global Ritz method is used with simple polynomials being employed as the trial functions. The most important objective of the present research is to study the effect of composite to metal proportion of hybrid wing structure on flutter boundaries in low supersonic regime. In addition, the effect of some important geometrical parameters such as sweep angle, taper ratio and aspect ratio on flutter boundaries were studied. The results obtained by present approach for special cases like pure metallic wings and results for high supersonic regime based on piston theory show a good agreement with those obtained by other investigators.

关键词： Assumed mode method flutter Hybrid trapezoidal plateMach box method Supersonic flow

flutter analysis of rotating beams with elastic restraints

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Applied Mathematics and Mechanics(English Edition) 2022年第5期43卷 761-776页

作者： Lüsen WANG Zhu SU Lifeng WANG State Key Laboratory of Mechanics and Control of Mechanical Structures Nanjing University of Aeronautics and AstronauticsNanjing 210016China

The aeroelastic stability of rotating beams with elastic restraints is *** coupled bending-torsional Euler-Bernoulli beam and Timoshenko beam models are adopted for the structural *** Greenberg aerodynamic model is used to describe the unsteady aerodynamic *** additional centrifugal stiffness effect and elastic boundary conditions are considered in the form of potential energy.A modified Fourier series method is used to assume the displacement field function and solve the governing *** convergence and accuracy of the method are verified by comparison of numerical ***,the flutter analysis of the rotating beam structure is carried out,and the critical rotational velocity of the flutter is *** results show that the elastic boundary reduces the critical flutter velocity of the rotating beam,and the elastic range of torsional spring is larger than the elastic range of linear spring.

关键词： rotating beam modified Fourier series method elastic restraint flutter

flutter and gust response analysis of a wing model including geometric nonlinearities based on a modified structural ROM

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Chinese Journal of Aeronautics 2020年第1期33卷 48-63页

作者： Chao AN Chao YANG Changchuan XIE Lan YANG School of Aeronautic Science and Engineering Beihang UniversityBeijing 100083China

In this paper,a framework is established for nonlinear flutter and gust response analyses based on an efficient Reduced Order Model(ROM).The proposed method can be used to solve the aeroelastic response problems of wings containing geometric nonlinearities.A structural modeling approach presented herein describes the stiffness nonlinearities with a modal *** orthogonal spanwise modes describe the foreshortening effects of the *** linearization of the ROM under nonlinear equilibrium states is applied to a nonlinear flutter analysis,and the fully nonlinear ROM coupled with the non-planar Unsteady Vortex Lattice Method(UVLM)is applied to gust response ***,extended Precise Integration Method(PIM)ensures accuracy of the dynamic equation *** demonstrate applicability and accuracy of the method presented,a wind tunnel test is conducted and good agreements between theoretical and test results of nonlinear flutter speed and gust response deflection are *** method described in this paper is suitable for predicting the nonlinear flutter speed and calculating the gust responses of a large-aspect-ratio wing in time ***,the results derived highlight the effects of geometric nonlinearities obviously.

关键词： Aeroelasticity flutter Geometric nonlinearity Reduced order models Response analysis Structural model

flutter analysis of compressor blades under travelling wave modes using an efficient fluid–structure interaction method

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Chinese Journal of Aeronautics 2023年第11期36卷 221-232页

作者： Kangdi LI Yunxiang DU Zili XU Shizhi ZHAO Lu CHENG State Key Laboratory for Strength and Vibration of Mechanical Structures Xi’an Jiaotong UniversityXi’an 710049China Beijing Institute of Structure and Environment Engineering Beijing 100076China State Key Laboratory of Clean and Efficient Turbomachinery Power Equipment Dongfang Steam Turbine Co.LtdDeyang 618000China

flutter is a self-sustained vibration which could create serious damage to compressor *** the efficiency and accuracy of Fluid-Structure Interaction(FSI)method is crucial to flutter *** efficient FSI method which combines a fast mesh deformation technology and Double-Passage Shape Correction(DPSC)method is proposed to predict blades flutter under traveling wave ***,regarding the fluid domain as a pseudo elastic solid,the flow mesh deformation and blade vibration response can be quickly obtained by solving the governing equations of the holistic system composed of blade and pseudo elastic ***,by storing and updating the Fourier coefficients on the circumferential boundary,the phase-lagged boundary condition is introduced into the computational ***,the aerodynamic stability for the blades of an axial compressor under various Inter-Blade Phase Angle(IBPA)is *** results show that the proposed method can effectively predict the characteristics of aerodynamic damping,aerodynamic force and blade *** a conceptual model is proposed to describe the motion behavior of the shock *** with the multi-passage method,the proposed method obtains almost the same unstable IBPA interval and the blade displacement error is less than 3.4%.But the calculation time is significantly shortened especially in small IBPA cases.

关键词： flutter Inter-blade phase angle Fast mesh deformation Fluid-structure interaction Shock wave