共查询到19条相似文献,搜索用时 62 毫秒
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基于计算组织理论,采用了多Agent模拟和离散事件模拟的集成方法,以组织成员间的协作关系为出发点,分析了不同的协作模式对组织效率的影响,讨论了在这些协作模式下沟通机制和激励机制的作用,得到了一些对组织结构设计有意义的结论。 相似文献
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目的 可穿戴设备能够长时间实时监测人体心脏状况,其在心电信号监测领域应用广泛。但目前仍没有公开的来自可穿戴设备的心电数据集,大部分心电信号分析算法都是针对医院设备所采集的心电数据。因此,本文使用IREALCARE 2.0柔性远程心电贴作为心电信号监测和采集设备制作了可穿戴设备的心电数据集。针对可穿戴心电数据干扰多、数据量大等特点,本文提出了一种针对可穿戴设备获得的心电信号进行自动分类的深层卷积神经网络,称之为时空卷积神经网络(time-spatial convolutional neural networks,TSCNN)。方法 将原始的长时间心电信号分割为单个的心搏并与滤波后不同频段的心搏数据组合成十通道的数据输入到TSCNN中。TSCNN对每个心搏使用时间卷积和空间滤波来提取丰富的特征。采用小卷积核级联卷积的方式提高分类性能,并降低网络的参数量和计算量。结果 在本文制作的心电数据集上进行了测试,并与其他4种心电分类算法:CNN(convolutional neural networks)、RNN(recurrent neural networks)、1-DCNN(1-dimensional convolution neural networks)和DCN(dense convolutional networks)进行了比较。实验结果显示,本文方法的分类准确率达到91.16%,优于其他4种方法。结论 本文方法面向可穿戴心电数据,获得了较好的分类性能,可以有效监控穿戴者是否出现了心电异常情况。 相似文献
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针对传统的基于触摸屏和计算机视觉的手势交互方法无法应对智能可穿戴设备逐渐趋向小型化和低功耗等问题,依据声波的Doppler效应和运动物体能够改变声波频率的特性,提出了一种基于超声波的低功耗鲁棒手势识别方法。该方法利用Goertzel算法进行超声波频率特征提取和分析,得到手势的移动方向并形成时间序列,进而利用隐马尔科夫模型实现用户手势识别。在微软移动终端Surface上的实验表明,此方法在安静和嘈杂的环境下都能达到较高的手势识别准确率、更高的鲁棒性、更低的计算成本和功耗,能够满足可穿戴设备发展对于手势识别的需求。 相似文献
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“潮流”这种东西往往爱跟人开玩笑,你越是觉得它高大上,它越是无人知晓;你越期待它high起来,它越惨淡潦倒。 相似文献
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可穿戴计算技术是一种将计算机穿戴在人体上进行各种应用的国际性前沿计算机技术,是智能环境的一个主要研究课题。可穿戴计算技术并非是简单地把计算机微小化后直接穿戴在人们身上,它需要解决很多关键性的技术才能真正发展起来,以满足人们的应用需求。其中最重要的四项技术为人机交互技术、嵌入式控制系统技术、无线连接技术和高效能源技术。若将可穿戴计算技术应用于智能服装,可为人们提供一个舒适的智能环境。因此,可以用Android智能手机作为上位机,AVR单片机作为微控制器,采用蓝牙无线通信方式,大容量锂离子电池作为能源,为运动受限的病人设计一款智能保暖服装,为他们提供一个舒适的生活环境。 相似文献
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基于可穿戴设备的移动计算被视为支撑泛在感知型应用的重要技术,它使用大范围部署的传感器持续不断地感知环境信息,利用短距通信和数据挖掘/机器学习技术传递和处理感知数据.现有的可穿戴设备相关工作主要关注新型移动应用、信息采集、产品形态和人性化用户接口等方面的设计与实现.然而,面向可穿戴设备的数据安全隐私保护技术研究尚处于起步阶段.从数据分析者的视角来看,研究者分析可穿戴设备的数据源特点与隐私安全隐患,重点研究基于多源感知数据的个体活动识别方法和数据挖掘机制;从隐私安全保护者的视角来看,面向可穿戴设备的隐私保护技术亟需解决云辅助的隐私保护机制、隐私感知的个人信息发布和基于策略的访问控制等方面的问题.以可穿戴健康跟踪设备Fitbit为对象展开了可穿戴设备安全与隐私实例分析.最后,总结了面向可穿戴设备的隐私保护的8条技术途径,并展望了需要进一步研究的热点问题. 相似文献
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刘丽群 《数码设计:surface》2011,(3):234-236
服装结构设计从造型入手,到内部变化,协同局部与整体进行设计;服装结构设计从效果分析入手,先从轮廓结构模拟到内部结构比例、分割、省、褶的分解,最后协调局部与整体,再回到效果的统一上来。这一个完整的服装结构设计过程离不开形式美法则的指导与运用。 相似文献
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唐盼盼 《自动化与仪器仪表》2020,(2):143-146
为了提高竞技体育训练的实时监测和动态评估能力,采用激光跟踪模拟训练方法进行竞技体育实时动态分析和训练系统设计,提出一种基于运动行为激光成像动态特征采集的竞技体育实时动态分析模拟系统系统设计方法。首先构建训练系统的总体结构模型,采用激光实时成像扫描仪进行体育训练三维图像采集,结合图像处理算法进行人体形态特征分析和动作矫正。然后进行系统的硬件设计,采用前级放大电路进行激光成像输出信号放大,构建CAN总线驱动电路进行激光模拟训练系统控制器与物理总线之间的接口设计。最后在嵌入式ARM中进行系统嵌入式开发设计,系统调试结果表明,采用该系统进行竞技体育人体实时动态分析,能准确反馈人体运动行为特征信息,结合专家系统进行动作矫正,指导体育训练,提高训练效果。 相似文献
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针对当前基于MATLAB/SIMULINK的半物理仿真(Hardware in Loop Simulation,HILS)系统中不支持多领域建模、联合仿真模型转换过程复杂且存在误差等问题,提出基于Modelica和建模仿真软件MWorks进行HILS的方法,分析其所涉及的建模方法、实时仿真接口和代码生成等关键技术,并以此为基础构建支持Modelica模型的HILS.以前起落架转向系统和起落架收放系统为应用实例,建立HILS平台,对该方法进行验证.仿真结果表明该方法可行,结果可信度高. 相似文献
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This paper presents a methodology to identify robust operating regions through the selection of controllable factory variables, using discrete event simulation. A casting plant melt facility was used as an industrial test bed to develop these techniques. A robust system design was determined by response surface analysis of key production parameters. Furthermore, robust operating policies that maximise throughput, while minimizing work-in-progress and thus energy consumption were identified. 相似文献
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城市混合交通微观仿真系统构架设计 总被引:1,自引:0,他引:1
按照面向对象的分析和设计原则,在需求分析的基础上,对城市交通微观仿真系统进行了模块划分,提出了系统的总体构架.随后对路网描述模型和控制算法选择模型进行了分析并得出了9个基本的类.最后对信号灯模型进行了讨论与实现.设计出了一个可复用可扩展的城市交通微观仿真系统构架. 相似文献
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This paper presents a modular design approach for the implementation of process-oriented or event-oriented discrete systems simulation software. Requirements for such a simulation facility are discussed, to include list processing capabilities, data structuring capabilities, dynamic allocation of data storage, statistics collection and number-crunching capabilities, and subprograms. Specific focus is placed upon implementing the process view which requires constructs in the language for initiating, controlling and terminating a process. Resource management facilities are also considered, to include a means of defining a resource with its associated resource handler and a set of primitives for requesting, releasing and obtaining status information regarding a resource. HPSIM, an organized collection of modules written in Modula-2, was designed to facilitate both event-oriented and process-oriented discrete systems simulation, Modula-2 was chosen for its data abstraction facilities, its software engineering capabilities, its execution efficiency, its ability for separate compilation and its implementation of co-routines. The modeller encapsulates the conceptual model of the system into a software module which is interfaced with the HPSIM modules. The IMPORT statement in Modula-2 allows the modeller to access any of the routines provided by HPSIM as required. An example involving a single-server CPU system highlights the process/resource features of HPSIM. 相似文献
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An efficient framework for optimal robust stochastic system design using stochastic simulation 总被引:2,自引:0,他引:2
Alexandros A. Taflanidis James L. Beck 《Computer Methods in Applied Mechanics and Engineering》2008,198(1):88-101
The knowledge about a planned system in engineering design applications is never complete. Often, a probabilistic quantification of the uncertainty arising from this missing information is warranted in order to efficiently incorporate our partial knowledge about the system and its environment into their respective models. This leads to a robust stochastic design framework where probabilistic models of excitation uncertainties and system modeling uncertainties can be introduced; the design objective is then typically related to the expected value of a system performance measure, such as reliability or expected life-cycle cost. For complex system models, this expected value can rarely be evaluated analytically and so it is often calculated using stochastic simulation techniques, which involve an estimation error and significant computational cost. An efficient framework, consisting of two stages, is presented here for the optimization in such robust stochastic design problems. The first stage implements a novel approach, called stochastic subset optimization (SSO), for iteratively identifying a subset of the original design space that has high plausibility of containing the optimal design variables. The second stage adopts some other stochastic optimization algorithm to pinpoint the optimal design variables within that subset. The focus is primarily on the theory and implementation issues for SSO but also on topics related to the combination of the two different stages for overall enhanced efficiency. An illustrative example is presented that shows the efficiency of the proposed methodology; it considers the optimization of the reliability of a base-isolated structure considering future near-fault ground motions. 相似文献
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The goal of applying collaborative product development in industry has raised the need to develop software tools supporting system integration and group collaboration. Current methods and tools mainly focus on the collaborative creation of design components and assemblies. However, few of them support the collaborative work in developing simulation models so that proposed design concepts and solutions can be evaluated by integrating expertise from several disciplines. The purpose of this research is to develop a distributed and interactive system on which designers and experts can work together to create, integrate and run simulations for engineering design. To develop such a system, a number of issues, e.g. effectiveness and efficiency of modeling work, the re-use of models, interaction and cooperation, accuracy of simulation, collaborative operation on models, etc., need to be addressed. This paper describes an open architecture to developing simulations for engineering design in a distributed and collaborative environment, identifies a set of key issues raised in this architecture, and presents the techniques employed in our solution. 相似文献
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传统结构优化建模方法对设计人员的能力要求较高,而现有辅助优化建模工具的通用性不强,导致复杂工程优化问题的模型建立十分困难,因此提出一种通用性较强的辅助优化建模方法.该方法将设计结构矩阵(Design Structure Matrix,DSM)思想引入优化模型的建立过程中,利用DSM结构形式和算法的优点方便有效地从复杂工程问题中提取优化模型并给出合理的优化流程.基于Excel的VBA语言开发辅助优化建模工具,快速准确地提取优化模型,并通过与优化软件Isight的接口程序自动将参与优化设计的模块映射成合理的优化流程图.采用燃气轮机支架结构的优化设计问题验证该辅助优化建模工具,并取得良好效果. 相似文献
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UML辅助化工过程模拟软件设计 总被引:1,自引:6,他引:1
面向对象技术是目前获得广泛应用的软件设计方法,在化工过程模拟领域也有大量应用。UML(United Model Language,统一建模语言)采用图形方式和基于静态样式的软件设计方式进行软件开发,可有效地解决化工模拟软件开发过程中软件开发人员与化工专业人员交流困难的问题,并可提高软件的复用程度和开发效率,是一种有效的面向对象的辅助设计工具。文中利用UML建立了化工过程单元和化工过程系统的对象模型。实践分析表明,利用UML辅助化工过程模拟软件设计可有效降低软件分析设计的难度,提高软件设计的质量和速度。 相似文献