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Traditional Chinese medicine: potential approaches from modern dynamical complexity theories

null

《医学前沿(英文)》 2016年 第10卷 第1期   页码 28-32 doi: 10.1007/s11684-016-0434-2

摘要:

Despite the widespread use of traditional Chinese medicine (TCM) in clinical settings, proving its effectiveness via scientific trials is still a challenge. TCM views the human body as a complex dynamical system, and focuses on the balance of the human body, both internally and with its external environment. Such fundamental concepts require investigations using system-level quantification approaches, which are beyond conventional reductionism. Only methods that quantify dynamical complexity can bring new insights into the evaluation of TCM. In a previous article, we briefly introduced the potential value of Multiscale Entropy (MSE) analysis in TCM. This article aims to explain the existing challenges in TCM quantification, to introduce the consistency of dynamical complexity theories and TCM theories, and to inspire future system-level research on health and disease.

关键词: traditional Chinese medicine     quantification     dynamical complexity     system level     balance     modern sciences    

Applications of dynamical complexity theory in traditional Chinese medicine

null

《医学前沿(英文)》 2014年 第8卷 第3期   页码 279-284 doi: 10.1007/s11684-014-0367-6

摘要:

Traditional Chinese medicine (TCM) has been gradually accepted by the world. Despite its widespread use in clinical settings, a major challenge in TCM is to study it scientifically. This difficulty arises from the fact that TCM views human body as a complex dynamical system, and focuses on the balance of the human body, both internally and with its external environment. As a result, conventional tools that are based on reductionist approach are not adequate. Methods that can quantify the dynamics of complex integrative systems may bring new insights and utilities about the clinical practice and evaluation of efficacy of TCM. The dynamical complexity theory recently proposed and its computational algorithm, Multiscale Entropy (MSE) analysis, are consistent with TCM concepts. This new system level analysis has been successfully applied to many health and disease related topics in medicine. We believe that there could be many promising applications of this dynamical complexity concept in TCM. In this article, we propose some promising applications and research areas that TCM practitioners and researchers can pursue.

关键词: traditional Chinese medicine     Multiscale Entropy     dynamical complexity     system level     applications    

Integrated virtual-design methods for forecasting radiated noise of single cylinder diesel block

GUO Lei, HAO Zhiyong, XU Hongmei, LIU Lianyun

《能源前沿(英文)》 2008年 第2卷 第4期   页码 416-421 doi: 10.1007/s11708-008-0097-z

摘要: The two cycle dynamical results, such as the bearing load, the piston thrust, and the load spatial distribution etc., were obtained by hybrid dynamical simulation of the flexible assembly of the block and crank-train. The finite element model of the block was validated by modal test. The frequency response of the block was calculated using the finite element method (FEM). Finally, the radiated noise such as sound power level and efficiency in the out sound field were obtained using the direct boundary element method (BEM).

关键词: bearing     dynamical     frequency response     dynamical simulation     hybrid dynamical    

动态快速路由查找算法

刘亚林

《中国工程科学》 2002年 第4卷 第7期   页码 60-68

摘要:

给出了动态快速路由查找算法(DFR)的原理和实现。该算法采用特殊的数据结构来构建索引表,能支持动态插入、删除和更新路由;DFR算法最多4次访存,最少2次访存,就能找到完整的路由信息。该算法不仅适用于软件实现,而且由于查找简单,也适合于硬件实现。

关键词: 前缀扩展     DFR     路由     路由查找    

Output tracking control of mobile manipulators based on dynamical sliding-mode control

WUYuxiang, FENG Ying, HU Yueming

《机械工程前沿(英文)》 2007年 第2卷 第1期   页码 110-115 doi: 10.1007/s11465-007-0019-5

摘要: A dynamical sliding-mode controller is devised to track the output of mobile manipulators. During the investigation, firstly a reduced dynamic model considering the dynamics of the driving motor is developed for mobile manipulators. Then, the system is decomposed into four lower-dimensional subsystems by means of diffeomorphism and nonlinear input transformation. Moreover, a design method of the dynamical sliding-mode controller that is applied to the output tracking of mobile manipulators is proposed. The simulation results indicate that the dynamical sliding-mode controller can not only track the given trajectory correctly but also reduce the chattering of sliding-mode control system considerably.

关键词: lower-dimensional     nonlinear     trajectory     tracking     diffeomorphism    

具有脉冲效应的复杂动态网络综述 Review Articles

Xiu-ping HAN, Yong-shun ZHAO, Xiao-di LI

《信息与电子工程前沿(英文)》 2020年 第21卷 第2期   页码 199-219 doi: 10.1631/FITEE.1900456

摘要: 本文回顾具有脉冲效应的复杂动态网络研究工作。将脉冲效应分为脉冲控制与脉冲干扰两个方面,较全面系统地总结具有脉冲效应的复杂动态网络基础性研究结果和最近研究进展。论文主要分5部分,包括复杂动态网络的同步脉冲、失同步脉冲、自适应脉冲同步、牵制脉冲同步以及具有随机和脉冲效应的复杂动态网络。最后,给出结论,并简要叙述具有脉冲效应的复杂动态网络未来研究方向。

关键词: 复杂动态网络;同步脉冲;失同步脉冲;牵制控制;时滞    

An integrated approach for machine-learning-based system identification of dynamical systems under control

《化学科学与工程前沿(英文)》 2022年 第16卷 第2期   页码 237-250 doi: 10.1007/s11705-021-2058-6

摘要: Advanced model-based control strategies, e.g., model predictive control, can offer superior control of key process variables for multiple-input multiple-output systems. The quality of the system model is critical to controller performance and should adequately describe the process dynamics across its operating range while remaining amenable to fast optimization. This work articulates an integrated system identification procedure for deriving black-box nonlinear continuous-time multiple-input multiple-output system models for nonlinear model predictive control. To showcase this approach, five candidate models for polynomial and interaction features of both output and manipulated variables were trained on simulated data and integrated into a nonlinear model predictive controller for a highly nonlinear continuous stirred tank reactor system. This procedure successfully identified system models that enabled effective control in both servo and regulator problems across wider operating ranges. These controllers also had reasonable per-iteration times of ca. 0.1 s. This demonstration of how such system models could be identified for nonlinear model predictive control without prior knowledge of system dynamics opens further possibilities for direct data-driven methodologies for model-based control which, in the face of process uncertainties or modelling limitations, allow rapid and stable control over wider operating ranges.

关键词: nonlinear model predictive control     black-box modeling     continuous-time system identification     machine learning     industrial applications of process control    

Novel interpretable mechanism of neural networks based on network decoupling method

《工程管理前沿(英文)》 2021年 第8卷 第4期   页码 572-581 doi: 10.1007/s42524-021-0169-x

摘要: The lack of interpretability of the neural network algorithm has become the bottleneck of its wide application. We propose a general mathematical framework, which couples the complex structure of the system with the nonlinear activation function to explore the decoupled dimension reduction method of high-dimensional system and reveal the calculation mechanism of the neural network. We apply our framework to some network models and a real system of the whole neuron map of Caenorhabditis elegans. Result shows that a simple linear mapping relationship exists between network structure and network behavior in the neural network with high-dimensional and nonlinear characteristics. Our simulation and theoretical results fully demonstrate this interesting phenomenon. Our new interpretation mechanism provides not only the potential mathematical calculation principle of neural network but also an effective way to accurately match and predict human brain or animal activities, which can further expand and enrich the interpretable mechanism of artificial neural network in the future.

关键词: neural networks     interpretability     dynamical behavior     network decouple    

Dynamical analysis of droplet impact spreading on solid substrate

Zhaomiao LIU, Huamin LIU, Xin LIU,

《机械工程前沿(英文)》 2010年 第5卷 第3期   页码 308-315 doi: 10.1007/s11465-010-0020-2

摘要: This paper investigates the impact spreading of a droplet on a solid substrate using numerical simulation on the basis of a volume-of-fluid (VOF) model. The process of droplet spreading is described, the analysis of low speed and high speed droplet spreading, and more than one droplet spreading simultaneously is performed. The pressure, velocity, and spreading factor during the droplet spreading are reported. According to the spreading factor’s evolvement, the process of droplet spreading can be classified into spreading phase and recoiling phase. The spreading factors are almost the same at the low speed droplet spreading; however, the pressures on the substrate are quite different and air entrainment may be found as the impact speeds in a certain range. The impact speed impacts on the spreading factors in high speed droplet spreading. The spreading factor obviously increases with increasing impact speed; however, splashing will appear in the status when the speed is high enough in the high speed droplet spreading. The distance between the neighbor droplets affects the film’s quality, and only the distance between the static diameter and the maximum diameter can ensure the film’s quality. The results could help in understanding the process of droplet spreading and provide advice on the operation of a spray coating process.

关键词: droplet     impact spreading     numerical simulation    

Dynamical research on spherical micro actuator with piezoelectric ceramic stacks drivers

ZHANG Ruihua, CHEN Haichu

《机械工程前沿(英文)》 2007年 第2卷 第4期   页码 433-438 doi: 10.1007/s11465-007-0074-y

摘要: This paper develops a 30 mm × 30 mm × 50 mm spherical micro actuator driven by piezoelectric ceramic stacks (PZT), and analyzes its dynamic performances. First, the space coordinate relationship of the spherical micro actuator and a dynamic model are set up. Second, The Runge-Kutta arithmetic is used to calculate the dynamical parameters of the micro actuator; the SIMULINK module of MATLAB is used to build the dynamical simulating model and then simulate it. Third, an experimental sample of the spherical micro actuator is developed, a micromanipulator is integrated with a micro-gripper based on the sample spherical micro actuator, and the experimental research on the micro assembly is conducted between a micro shaft of 180 μm and a micro spindle sleeve of 200 μm. Finally, the characteristics of the spherical micro actuator influenced by the mass of the metal sphere of the micro actuator, driving signal frequency, friction coefficient of the contact surface between the metal sphere and the friction block of the micro driving unit are analyzed. The experimental results indicate that the rotation resolution of the micro actuator reaches 0.000 1°, the rotation positioning precision reaches 0.000 5°, and the maximum working frequency is about 1200 Hz. The experimental results validate the back rotation vibration model of the spherical micro actuator. The micromanipulator integrated by the spherical micro actuator can meet the requirements of precise micro operation and assembly for micro electro mechanical systems (MEMS) or other microelements in micro degree fields.

关键词: spherical     micro-gripper     friction coefficient     dynamic     frequency    

Review of human–robot coordination control for rehabilitation based on motor function evaluation

《机械工程前沿(英文)》 2022年 第17卷 第2期 doi: 10.1007/s11465-022-0684-4

摘要: As a wearable and intelligent system, a lower limb exoskeleton rehabilitation robot can provide auxiliary rehabilitation training for patients with lower limb walking impairment/loss and address the existing problem of insufficient medical resources. One of the main elements of such a human–robot coupling system is a control system to ensure human–robot coordination. This review aims to summarise the development of human–robot coordination control and the associated research achievements and provide insight into the research challenges in promoting innovative design in such control systems. The patients’ functional disorders and clinical rehabilitation needs regarding lower limbs are analysed in detail, forming the basis for the human–robot coordination of lower limb rehabilitation robots. Then, human–robot coordination is discussed in terms of three aspects: modelling, perception and control. Based on the reviewed research, the demand for robotic rehabilitation, modelling for human–robot coupling systems with new structures and assessment methods with different etiologies based on multi-mode sensors are discussed in detail, suggesting development directions of human–robot coordination and providing a reference for relevant research.

关键词: human–robot coupling     lower limb rehabilitation     exoskeleton robot     motor assessment     dynamical model     perception    

大飞机气动总体技术的发展

张彦仲

《中国工程科学》 2009年 第11卷 第5期   页码 4-17

摘要:

论述了大飞机常规气动布局的发展,客机机身技术以及新型气动布局——翼身融合体飞机(BWB)的发展。分析了气动总体技术对于大型飞机的安全性、经济性、舒适性和环保性等方面的作用, 并结合国内的研究现状提出我国加强气动总体技术研究,走自主创新道路的意见。

关键词: 大飞机     气动     超临界翼型     翼梢小翼     层流技术     翼身融合体     CFD     风洞试验     气动噪音    

一个描述机器人团队形成的动态演化模型

李淑琴,程显毅,唐振民,杨静宇

《中国工程科学》 2006年 第8卷 第4期   页码 28-31

摘要:

目前在多机器人领域,对组织、团队和群体概念比较混乱,团队形成的研究大都停留在定性分析阶段。借鉴Markov过程和进化计算,从协作主体层和能力层研究了机器人团队和组织的区别及团队的形成机制。提出并全面描述了一个机器人团队形成的动态演化模型,目前国内外尚无类似模型。该模型不仅能对机器人团队有一个整体描述,而且能定量描述团队形成时的动态演化过程。

关键词: 机器人     机器人团队     动态演化    

环境友好型全水压冲击凿岩机动力学建模与数值仿真

岳文辉,刘德顺,伍先明,朱萍玉,李夕兵

《中国工程科学》 2007年 第9卷 第8期   页码 57-61

摘要:

介绍了以普通水作为传动、支撑推进、排屑和润滑介质的环境友好型全水压凿岩机;建立了以弹性杆、弹簧为基本单元的冲击凿岩机 波动力学模型;对YST–25全水压凿岩机进行了动态数值仿真与分析。研究结果表明:活塞最大压应力为102 MPa,最大拉应力为28 MPa,满足 了强度设计要求;钎杆中的应力比活塞的大;尽量减小活塞的截面积变化有利于延长活塞寿命;为了保证凿岩速度和能量传递效率,YST–25凿 岩机宜于在中硬到硬岩中钻进。这为环境友好型全水压冲击凿岩机的改进设计和效能评估提供了依据。

关键词: 冲击     波动力学     仿真     水压凿岩机    

煤与瓦斯突出潜在危险区(带)预测

鲜学福,许江,王宏图

《中国工程科学》 2001年 第3卷 第2期   页码 39-46

摘要:

煤矿的生产和实践证明,发生在矿井中的动力现象具有分区和成带的特点。文章探讨了把煤、岩和瓦斯作为一个体系,采用力学方法的划分问题。根据对煤岩复合样及含瓦斯煤样在复杂应力状态下力学性质的分析,基于对Drucker-prager理论的修正和完善,建立了它们的断裂判据,并给出了计算稳定性系数和潜在弹性应变能密度的公式,提出了按这两个指标划分煤与瓦斯突出潜在危险区(带)的基本方法。

关键词: 矿井中的动力现象     煤与瓦斯突出     潜在危险区(带)     断裂判据     稳定性系数     弹性应变能密度    

标题 作者 时间 类型 操作

Traditional Chinese medicine: potential approaches from modern dynamical complexity theories

null

期刊论文

Applications of dynamical complexity theory in traditional Chinese medicine

null

期刊论文

Integrated virtual-design methods for forecasting radiated noise of single cylinder diesel block

GUO Lei, HAO Zhiyong, XU Hongmei, LIU Lianyun

期刊论文

动态快速路由查找算法

刘亚林

期刊论文

Output tracking control of mobile manipulators based on dynamical sliding-mode control

WUYuxiang, FENG Ying, HU Yueming

期刊论文

具有脉冲效应的复杂动态网络综述

Xiu-ping HAN, Yong-shun ZHAO, Xiao-di LI

期刊论文

An integrated approach for machine-learning-based system identification of dynamical systems under control

期刊论文

Novel interpretable mechanism of neural networks based on network decoupling method

期刊论文

Dynamical analysis of droplet impact spreading on solid substrate

Zhaomiao LIU, Huamin LIU, Xin LIU,

期刊论文

Dynamical research on spherical micro actuator with piezoelectric ceramic stacks drivers

ZHANG Ruihua, CHEN Haichu

期刊论文

Review of human–robot coordination control for rehabilitation based on motor function evaluation

期刊论文

大飞机气动总体技术的发展

张彦仲

期刊论文

一个描述机器人团队形成的动态演化模型

李淑琴,程显毅,唐振民,杨静宇

期刊论文

环境友好型全水压冲击凿岩机动力学建模与数值仿真

岳文辉,刘德顺,伍先明,朱萍玉,李夕兵

期刊论文

煤与瓦斯突出潜在危险区(带)预测

鲜学福,许江,王宏图

期刊论文