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Study on Wave Dissipation of the Structure Combined by Baffle and Submerged Breakwater 被引量:4
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作者 JU Lie-hong zuo Qi-hua +1 位作者 TENG Ling WANG Xing-gang 《China Ocean Engineering》 SCIE EI CSCD 2017年第6期674-682,共9页
This paper proposes a structure combined by baffle and submerged breakwater (abbreviated to SCBSB in the following texts). Such a combined structure is conducive to the water exchange in the harbor, and has strong c... This paper proposes a structure combined by baffle and submerged breakwater (abbreviated to SCBSB in the following texts). Such a combined structure is conducive to the water exchange in the harbor, and has strong capability on wave dissipation. Our paper focuses on the discussion of two typical structures, i.e., the submerged baffle and rectangular breakwater combined with the upper baffle respectively, which are named as SCBSB 1 and SCBSB2 for short. The eigenfunction method corrected by experimental results is used to investigate the wave dissipation characteristics. It shows that the calculated results agree well with the experimental data and the minimum value of the wave transmission coefficient can be obtained when the distance between the front and rear structures is from 1/4 to 1/2 of the incident wave length. 展开更多
关键词 combined wave dissipation structure eigenfunction method physical model experiment transmissioncoefficient correction wave dissipation effect
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Characteristics of viscous debris flow in a drainage channel with an energy dissipation structure 被引量:4
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作者 CHEN Jian-gang CHEN Xiao-qing +1 位作者 CHEN Hua-yong ZHAO Wan-yu 《Journal of Mountain Science》 SCIE CSCD 2016年第2期223-233,共11页
A new type of drainage channel with an energy dissipation structure has been proposed based on previous engineering experiences and practical requirements for hazard mitigation in earthquakeaffected areas.Experimental... A new type of drainage channel with an energy dissipation structure has been proposed based on previous engineering experiences and practical requirements for hazard mitigation in earthquakeaffected areas.Experimental studies were performed to determine the characteristics of viscous debris flow in a drainage channel of this type with a slope of 15%.The velocity and depth of the viscous debris flow were measured,processed,and subsequently used to characterize the viscous debris flow in the drainage channel.Observations of this experiment showed that the surface of the viscous debris flow in a smooth drainage channel was smoother than that of a similar debris flow passing through the energy dissipation section in a channel of the new type studied here.However,the flow patterns in the two types of channels were similar at other points.These experimental results show that the depth of the viscous debris flow downstream of the energy dissipation structure increased gradually with the length of the energy dissipation structure.In addition,in the smooth channel,the viscous debris-flow velocity downstream of the energy dissipation structure decreased gradually with the length of the energy dissipation structure.Furthermore,theviscous debris-flow depth and velocity were slightly affected by variations in the width of the energy dissipation structure when the channel slope was 15%.Finally,the energy dissipation ratio increased gradually as the length and width of the energy dissipation structure increased;the maximum energy dissipation ratio observed was 62.9%(where B = 0.6m and L/w = 6.0). 展开更多
关键词 Debris flow Drainage channel Energy dissipation structure Geological disaster
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Hydraulic Design Method of Wave Dissipating Structure with Partially Perforated Front Wall 被引量:6
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《China Ocean Engineering》 SCIE EI 1995年第1期73-82,共10页
Based on the matching conditions of different fluid regions, the eigenfunction expansion method is used to develop a theoretical formula for wave reflection in front of the perforated structure with a partially slit f... Based on the matching conditions of different fluid regions, the eigenfunction expansion method is used to develop a theoretical formula for wave reflection in front of the perforated structure with a partially slit front wall. The accuracy of the solution is verified by comparing the numerical results with experimental data. In addition, a new hydraulic design method is developed by derivation of the theoretical formula with respect to the porosity of the slit wall, and the results of this design method is drafted for harbour engineers to use. 展开更多
关键词 wave dissipating structure hydraulic design method
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Nonequilibrium Thermodynamic and Dissipative Structure Mechanism of Fluidized Beds
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作者 Maozhan Qi Li Wang Xuezi Ni (Mechanical Engineering School, University of Science and Technology Beijing, Beijing 100083, China) 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 1999年第2期90-93,共4页
Fluidized beds are nonlinear dynamic systems that exchange mass and energy with outside. They are governed not only byfluid dynamics, but by thermodynamics, especially the second law of thermodynamics as well. Accordi... Fluidized beds are nonlinear dynamic systems that exchange mass and energy with outside. They are governed not only byfluid dynamics, but by thermodynamics, especially the second law of thermodynamics as well. According to Prigogine's dissipative structure theory, the following have been concluded: (l) a fixed bed is on thermodynamic blanch, and bubbling, turbulent and fast beds areon the dissipatve structure branches. (2) Entropy in fluidized beds is divided into tWo parts: entropy production and entropy flux. The latter increases with gas velocity and decreases with pressure of the systems. That means the entropy of a system may reduce and the systemwith higher gas velocity behaves as dissipative structure characteristics. (3) For a giVen velocity, a fluidized bed operates stably on thewhole, but it is unstable to local gas-solid phases. The unstable phases are described by fluid dynamic equations, While the minimum ofsystem energy function assures whole stability of the system. (4) A transition criterion of a bubbling bed is derived from Prigogine's stability theory. 展开更多
关键词 fluidized bed nonequilibrium thermodynamics dissipative structure energy extremum
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Discussion of Dissipation Structure in a Directionally Solidified Alloy
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作者 Liling SUN Qi WU Jinghua ZHANG and Zhuangqi HU (State Key Lab. of Rapidly Solidified Nonequilibrium Alloys, Institute of Metal Research, Academia Sinica,Shenyang, 110015, China) 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 1994年第3期229-231,共3页
The dissipation theory was introduced into the solidification area to describe the inherent laws of solidification from a new viewpoint. Discussion demonstrates that the solid / liquid interface in a directionally sol... The dissipation theory was introduced into the solidification area to describe the inherent laws of solidification from a new viewpoint. Discussion demonstrates that the solid / liquid interface in a directionally solidified alloy belongs to a kind of dissipation structure 展开更多
关键词 Discussion of Dissipation structure in a Directionally Solidified Alloy
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基于耗散结构理论的公立医院组织韧性形成机制研究
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作者 王安琪 唐昌海 +2 位作者 顾一纯 王海银 金春林 《中国卫生资源》 CSCD 北大核心 2023年第6期704-710,共7页
借助耗散结构理论探寻公立医院组织韧性的形成机制和培育策略。首先分析耗散结构理论与公立医院组织韧性的关联性;其次从识别危机信号、适应危机变化、实现危机中反弹3个阶段分析公立医院组织韧性的形成路径,聚焦于检测性激活、适应性... 借助耗散结构理论探寻公立医院组织韧性的形成机制和培育策略。首先分析耗散结构理论与公立医院组织韧性的关联性;其次从识别危机信号、适应危机变化、实现危机中反弹3个阶段分析公立医院组织韧性的形成路径,聚焦于检测性激活、适应性重构、反思性转化3项动态循环的行为,并结合耗散结构理论中熵变调节、自组织机制、涨落反馈等核心思想,提取组织韧性形成的6个关键要素,即预防正熵、增加负熵、制度适时调整、资源调配使用、反思学习、组织优化,并对每个关键要素对应的行为表现进行阐述;再者提出公立医院组织韧性的培育策略,包括培育公立医院物理韧性、制度韧性、人员技术韧性、心理韧性等,以期实现公立医院由脆弱性向韧性转变。 展开更多
关键词 公立医院public hospital 组织韧性organizational resilience 耗散结构理论dissipative structure theory 形成机制formation mechanism 突发公共卫生事件public health emergency
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Symplectic(辛)几何学与航空发动机的结构设计
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作者 邓子辰 《大自然探索》 1997年第3期18-20,共3页
Symplectic(辛)几何学与航空发动机的结构设计西北工业大学教授邓子辰计算结构力学与最优控制模拟理论的建立,说明这两门学科之间存在相似性。近几年的工作主要是将结构力学中的一些有效方法(如多重子结构法、能量法等... Symplectic(辛)几何学与航空发动机的结构设计西北工业大学教授邓子辰计算结构力学与最优控制模拟理论的建立,说明这两门学科之间存在相似性。近几年的工作主要是将结构力学中的一些有效方法(如多重子结构法、能量法等)成功地引入了最优控制领域,并已取... 展开更多
关键词 the earth system nonequilibrium theory dissipative structure theory gravitation field theory material stream energy stream the information stream
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NONLINEAR EVOLUTION SYSTEMS AND GREEN’S FUNCTION 被引量:8
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作者 王维克 《Acta Mathematica Scientia》 SCIE CSCD 2010年第6期2051-2063,共13页
In this paper, we will introduce how to apply Green's function method to get the pointwise estimates for the solutions of Cauchy problem of nonlinear evolution equations with dissipative structure. First of all, we i... In this paper, we will introduce how to apply Green's function method to get the pointwise estimates for the solutions of Cauchy problem of nonlinear evolution equations with dissipative structure. First of all, we introduce the pointwise estimates of the time-asymptotic shape of the solutions of the isentropic Navier-Stokes equations and show to exhibit the generalized Huygen's principle. Then, for other nonlinear dissipative evolution equations, we will only introduce the result and give some brief explanations. Our approach is based on the detailed analysis of the Green's function of the linearized system and micro-local analysis, such as frequency decomposition and so on. 展开更多
关键词 conservation laws with dissipative structure pointwise estimate Green's function generalized Huygen's principle
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Antitumor effects of electrochemical treatment 被引量:2
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作者 Héctor Manuel Camué Ciria Maraelys Morales González +13 位作者 Lisset Ortíz Zamora Luis Enrique Bergues Cabrales Gustavo Victoriano Sierra González Luciana Oliveira de Oliveira Rodrigo Zanella Antonio Carlos Buzaid Orlando Parise Luciana Macedo Brito Cesar Augusto Antunes Teixeira Marina das Neves Gomes Gleyce Moreno Venicio Feo da Veiga Marcos Telló Carla Holandino 《Chinese Journal of Cancer Research》 SCIE CAS CSCD 2013年第2期223-234,共12页
Electrochemical treatment is an alternative modality for tumor treatment based on the application of a low intensity direct electric current to the tumor tissue through two or more platinum electrodes placed within th... Electrochemical treatment is an alternative modality for tumor treatment based on the application of a low intensity direct electric current to the tumor tissue through two or more platinum electrodes placed within the tumor zone or in the surrounding areas. This treatment is noted for its great effectiveness, minimal invasiveness and local effect. Several studies have been conducted worldwide to evaluate the anfitumoral effect of this therapy. In all these studies a variety of biochemical and physiological responses of tumors to the applied treatment have been obtained. By this reason, researchers have suggested various mechanisms to explain how direct electric current destroys tumor ceils. Although, it is generally accepted this treatment induces electrolysis, electroosmosis and electroporation in tumoral tissues. However, action mechanism of this alternative modality on the tumor tissue is not well understood. Although the principle of Electrochemical treatment is simple, a standardized method is not yet available. The mechanism by which Electrochemical treatment affects tumor growth and survival may represent more complex process. The present work analyzes the latest and most important research done on the electrochemical treatment of tumors. We conclude with our point of view about the destruction mechanism features of this alternative therapy. Also, we suggest some mechanisms and strategies from the thermodynamic point of view for this therapy. In the area of Electrochemical treatment of cancer this tool has been exploited very little and much work remains to be done. Electrochemical treatment constitutes a good therapeutic option for patients that have failed the conventional oncology methods. 展开更多
关键词 Direct electric current electrochemical treatment antimmoral treatment TUMOR tumor electrolysis rumor entropy dissipative structure
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A spatially triggered dissipative resource distribution policy for SMT processors 被引量:1
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作者 Hong-zhou CHEN Xue-zeng PAN +2 位作者 Ling-di PING Kui-jun LU Xiao-ping CHEN 《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》 SCIE EI CAS CSCD 2008年第8期1070-1082,共13页
Programs take on changing behavior at nmtime in a simultaneous multithreading (SMT) environment. How reasonably common resources are distributed among the threads significantly determines the throughput and fairness... Programs take on changing behavior at nmtime in a simultaneous multithreading (SMT) environment. How reasonably common resources are distributed among the threads significantly determines the throughput and fairness performance in SMT processors. Existing resource distribution methods either mainly rely on the front-end fetch policy, or make distribution decisions according to the limited information from the pipeline. It is difficult for them to efficiently catch the various resource requirements of the threads. This work presents a spatially triggered dissipative resource distribution (SDRD) policy for SMT processors, its two parts, the self-organization mechanism that is driven by the real-time instructions per cycle (IPC) performance and the introduction of chaos that tries to control the diversity Of trial resource distributions, work together to supply sustaining resource distribution optimization for changing program behavior. Simulation results show that SDRD with fine-grained diversity controlling is more effective than that with a coarse-grained one. And SDRD benefits much from its two well-coordinated parts, providing potential fairness gains as well as good throughput gains. Meanings and settings of important SDRD parameters are also discussed. 展开更多
关键词 Simultaneous multithreading (SMT) Resource distribution Dynamic optimization Dissipative structures
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NON-EQUILIBRIUM STATIONARY STATE IN CHEMICAL REACTION OF SiO_2/Fe AT INTERFACE OF SLAG/METAL AND ITS STABILITY DURING ARC WELDING 被引量:2
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作者 LI Xiaoquan DU Zeyu YANG Xuguang 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2007年第1期44-46,共3页
For characteristics of open and far from thermodynamic equilibrium in welding chemical reaction, a new kind of quantitative method, which is used to analyze direction and extent for chemical reaction of SiO2/Fe during... For characteristics of open and far from thermodynamic equilibrium in welding chemical reaction, a new kind of quantitative method, which is used to analyze direction and extent for chemical reaction of SiO2/Fe during quasi-steady state period, is introduced with the concept of non-equilibrium stationary state. The main idea is based on thermodynamic driving forces, which result in non-zero thermodynamic fluxes and lead to chemical reaction far away from thermodynamic equilibrium. There exists certain dynamic equilibrium relationship between rates of diffusion fluxes in liquid phase of reactants or products and the rate equation of chemical reaction when welding is in quasi-steady state. As result of this, a group of non-linear equations containing concentrations of all substances at interface of slag/liquid-metal may be established. Moreover the stability of this non-equilibrium stationary state is discussed using dissipative structure theory and it is concluded theoretically that this non-equilibrium stationary state for welding chemical reaction is of stability. 展开更多
关键词 Welding chemical metallurgy Non-equilibrium stationary state Dissipative structure Stability
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Role of Convection Flow on the Pattern Formation in the Drying Process of Colloidal Suspension
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作者 马文杰 王育人 蓝鼎 《Chinese Physics Letters》 SCIE CAS CSCD 2008年第4期1351-1354,共4页
We study the macroscopic drying patterns of aqueous suspensions of colloidal silica spheres. It was found that convection strength can influence pattern formation. Uniformed films are obtained at weaker convection str... We study the macroscopic drying patterns of aqueous suspensions of colloidal silica spheres. It was found that convection strength can influence pattern formation. Uniformed films are obtained at weaker convection strength. In addition, we make clear that it is not reasonable to discuss individually the effect of temperature and humidity on the colloid self-assembly. The physical mechanism is that these factors have relationship with the evaporation rate, which can affect the convection strength. 展开更多
关键词 DISSIPATIVE structureS COVER GLASS AQUEOUS-SOLUTION HYDRODYNAMIC STABILITY EVAPORATING LIQUID CRYSTALS SPHERES
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Dynamic Mechanism of Migmatization in the Dabie Complex, Northeastern Hubei, China
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作者 Wang Jianghai, Guangzhou Institute of New Geological Technology, Academia Sinica, Guangzhou,GuangdongYang Wenhua and Wu Jinping China U niversity of Geosciences, W uhan, Hubei Jiang M inxi 《Acta Geologica Sinica(English Edition)》 SCIE CAS CSCD 1995年第2期135-154,共20页
On the basis of the detailed field work, compositions and contents of plagioclase and K - feldspar,determination of ordering degree, statistical analysis of plagioclase elongation index, mass-balance calculation and m... On the basis of the detailed field work, compositions and contents of plagioclase and K - feldspar,determination of ordering degree, statistical analysis of plagioclase elongation index, mass-balance calculation and mineral spatial distribution and geochemistry, it is concluded that the migmatites in the Dabie complex are characterized by the presence of thermocenters. There are regular changes in mineral character in the migmatites from the centers outwards. The dominant genetic mechanism is anatexis and metasomatism, whose intensities decrease from the centers outwards. Finally, according to the simulated experiment on Liesegang' s rings and non-linear dynamics (dissipative structure theory), the dynamic mechanism of migmatization is profoundly expouded as consisting of the early-stage metasomatism induced by the thermal anomaly, the cardinal-stage anatexis induced by the early-stage matasomatism and finally the last-stage post-anatexis metasomatism. 展开更多
关键词 Dabie complex MIGMATITES dynamic mechanism dissipative structure diffusion inverse to concentration gradients
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Analysis of Venezuela's oil-oriented economy: from the perspective of entropy
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作者 Xian-Zhong Mu Guang-Wen Hu 《Petroleum Science》 SCIE CAS CSCD 2018年第1期200-209,共10页
To investigate the efficiency and stability of Venezuela's oil-oriented economy, this paper applied entropy to the analysis.Based on this method, Venezuela's oil-centered industry, inefficient regulatory system, and... To investigate the efficiency and stability of Venezuela's oil-oriented economy, this paper applied entropy to the analysis.Based on this method, Venezuela's oil-centered industry, inefficient regulatory system, and insensitive response to external changes are recognized as an increase in the country's entropy. According to these facts, a dissipative structure model is constructed to analyze the efficiency and stability of the Venezuela's economic system. The results show that financial assistants(fund flow), policy reform(policy flow), and advanced technology(technology flow) can perform as negative entropy inflows(NEIFs). These NEIFs will promote a series of influence and feedback reactions, which will contribute to recovering Venezuela's system efficiency and stability. 展开更多
关键词 VENEZUELA Oil-oriented economy system Resource curse ENTROPY Dissipative structure
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Nonlinear Dynamic Characteristics of Combustion Wave in SHS Process
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作者 邹正光 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2002年第1期23-26,共4页
The characteristic of combustion wave and its change were analyzed by numerical value calculation and computer simulation, based on the combustion dynamical model of SHS process. It is shown that with the change of co... The characteristic of combustion wave and its change were analyzed by numerical value calculation and computer simulation, based on the combustion dynamical model of SHS process. It is shown that with the change of condition parameters in SHS process various time-space order combustion waves appear. It is concluded from non-liner dynamical mechanism analysis that the strong coupling of two non-linear dynamical processes is the dynamical mechanism causing the time-space order dissipation structures. 展开更多
关键词 SHS combustion wave simulation dissipation structure non-linear dynamics
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Dissolution Dynamics of Grossularite and Hedenbergite
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作者 Cen KuangChina University of Geosciences, Wuhan 430074 《Journal of Earth Science》 SCIE CAS CSCD 1993年第1期51-56,共6页
The relationship between dissolution rate and pH is determined by carrying out dynamic experiments of hedenbergite and grossularite dissolution .The dissolution reaction equations are established .The dissolution proc... The relationship between dissolution rate and pH is determined by carrying out dynamic experiments of hedenbergite and grossularite dissolution .The dissolution reaction equations are established .The dissolution processes of two minerals are simulated by using the theory of multi-phase and mufti-component chemical equilibrium . The results bring light to the mechanism of dissolution processes .Due to incongruent dissolution of two minerals when the dissolution processes reach a metastable supersaturation critical point new metastable minerals can be formed in the system .The experiments showed that dissolution of grossularite and hedenbergite consumes H+ and then makes pH value of solution high . In turn , precipitation of metastable minerals makes pH value low .Precipitation of metastable minerals has a catalytic effect for dissolution of reacting minerals in special time .Precipitation and dissolution carried out alternately in the system and it causes periodic oscillation of pH values with reacting time . This is the dissipative structure or self-organization happened in the processes of mineral dissolution. 展开更多
关键词 dissipative structure DISSOLUTION grossularite hedenbergite.
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Ore Zoning as Self-Organization of Geochemical Dynamic Systems
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作者 Yu ChongwenDepartment of Geochemistry, China University of Geosciences, Wuhan 430074 《Journal of Earth Science》 SCIE CAS CSCD 1990年第1期58-61,共4页
Zoning in ore bodies, ore deposits and ore regions are recognized as temporal-spatial structures generated by the dynamics of ore- forming processes. Viewed from the theory of dissipative structures, ore zoning is a k... Zoning in ore bodies, ore deposits and ore regions are recognized as temporal-spatial structures generated by the dynamics of ore- forming processes. Viewed from the theory of dissipative structures, ore zoning is a kind of self-organization phenomenon occurring in far from-equilibrium geochemical dynamic systems. Therefore,kinetic and dynamic approaches must be taken to reveal the mechanisms of ore zoning. Two dominant coupling processes leading to ore zoning——reaction-transport feedbacks and double-diffusive convection——are discussed. 展开更多
关键词 ore zoning dissipative structures self-organization dynamic systems reaction-transport double-diffusive convection.
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The study on the evolution of real estate industry based on the theory of self-organization
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作者 Zhang Jiankun Luo Weidong Bai Dongmei 《Engineering Sciences》 EI 2009年第3期47-51,共5页
Based on some basic principles of self-organization theory including dissipation structure and synergy,the author analyzes the condition,dynamic and evolving route of the self-organization evolution of the real estate... Based on some basic principles of self-organization theory including dissipation structure and synergy,the author analyzes the condition,dynamic and evolving route of the self-organization evolution of the real estate industry,and builds synergetic evolution model,calculates out the order parameter of the real estate industry. The paper supplies new methods and tools for further research of real estate industry and contributes to reference of the government for its direction of macro-control. 展开更多
关键词 real estate industry dissipation structure SYNERGETICS order parameter
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Engineering practice of seismic isolation and energy dissipation structures in China 被引量:10
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作者 PAN Peng YE LiePing +1 位作者 SHI Wei CAO HaiYun 《Science China(Technological Sciences)》 SCIE EI CAS 2012年第11期3036-3046,共11页
The concepts of seismic isolation and energy dissipation structures emerged in the early 1970s.In China,the first seismic isolation structure was finished in 1993,and the first energy dissipation structure was built a... The concepts of seismic isolation and energy dissipation structures emerged in the early 1970s.In China,the first seismic isolation structure was finished in 1993,and the first energy dissipation structure was built at about the same time.Up to 2007,China had more than 600 seismic isolation and about 100 energy dissipation building structures.In 2008,the huge Wenchuan earthquake hit the southwest of China,which triggered a bloom of new seismic isolation and energy dissipation structures.This paper presents the development history and representative applications of seismic isolation and energy dissipation structures in China,reviews the state-of-the-practice of Chinese design,and discusses the challenges in the future applications.Major findings are as follows:Basic design procedures are becoming standardized after more than ten years of experiences,which mainly involve determination of design earthquake forces,selection of ground motions,modeling and time-history analyses,and performance criteria.Nonlinear time-history analyses using multiple ground motions are the characteristic of the design of seismic isolation and energy dissipation structures.Regulations,standardization and quality control of devices,balance between performance and cost,comparison with real responses,and regular inspection are identified as the issues that should be improved to further promote the application of seismic isolation and energy dissipation structures in China. 展开更多
关键词 seismic isolation structure energy dissipation structure development history design practice regulatory environment
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Dissipative structure for symmetric hyperbolic systems with memory 被引量:1
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作者 Shuichi Kawashima Shogo Taniue 《Science China Mathematics》 SCIE CSCD 2018年第11期2053-2064,共12页
We study symmetric hyperbolic systems with memory-type dissipation and investigate their dissipative structures.We treat two cases:memory-type diffusion and memory-type relaxation,and observe that the dissipative stru... We study symmetric hyperbolic systems with memory-type dissipation and investigate their dissipative structures.We treat two cases:memory-type diffusion and memory-type relaxation,and observe that the dissipative structures of these two cases are essentially different.Namely,we show that the dissipative structure of the system with memory-type diffusion is of the standard type,while that of the system with memory-type relaxation is of the regularity-loss type. 展开更多
关键词 hyperbolic systems memory-type dissipation dissipative structure
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