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NUMERICAL SIMULATION OF STRESS WAVE PROPAGATION WITH UNSTRUCTURED FINITE VOLUME TIME DOMAIN METHOD

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Acta Mechanica Solida Sinica 2011年第S1期24卷 54-60页

作者： Pingjian Ming 1 Lingkuan Xuan Wenping Zhang (College of Power and Energy engineering, harbin engineering university, harbin 150001, China)

An unstructured finite volume time domain method (UFVTDM) is proposed to simulate stress wave propagation. The original variables of displacement and stress are solved based on the dynamic equilibrium equations. An Euler explicit and unstructured finite volume method is used for time and spacial terms respectively. The displacements are stored on the cell vertex and a vertex based finite volume is formed with the integral surface and the stress is assumed as uniform in the cell. This is some similar with the stager grid method in computational fluid dynamics. Several cases are used to show the capability of the algorithm.

关键词： unstructured grid finite volume method time domain stress wave

New concept research on mono-hull compounded ship form with high seakeeping performance

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Journal of Marine Science and Application 2003年第1期2卷 19-23,44页

作者： LIU Ya-dong, LI Ji-de, WANG Qing School of Shipbuilding engineering,harbin engineering university, harbin 150001, China School of Shipbuilding engineering Harbin Engineering University Harbin 150001 China

The seakeeping performance of a certain ship equipped with semi-submerged bow ( SSB) and bow-fins is discussed. The numerical calculations are carried out on a 600t deep-V compound archetypal ship. The results show that the compounded ship form has excellent seakeeping performance and thus it establishes the theoretical foundations for the development of mono-hull compounded ship form with high se akeeping performance.

关键词： compound ship semi-submerged bow bow-fin

A Heuristic Approach for Automated Composition of Semantic Web Services

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A Heuristic Approach for Automated Composition of Semantic W...

The Third International Conference on Information Systems for Crisis Response and Management & the Fourth International Symposium on Geo-Infprmation for Disaster Management

作者： Wenlin Pan College of Mechanical and Electrical engineering harbin engineering university harbin China 150001 Daxin Liu College of Computer Science and Technology harbin engineering university harbin China 150001

＜正＞Web services composition is a combinatorial *** composition of Semantic Web Services can be achieved by using heuristic *** can formal present the property of web service,there for,Semantic Web Services can be considered as a subset of knowledge *** a granular knowledge domain consisting of a large number of individual properties and a large number of services that provide mappings between sets of properties,the objective of the services composition is to select a minimum cost combination of service that can provide a joint mapping from a given set of input properties to a set of output properties.A general framework for heuristic is presented.

关键词： Semantic web web service service composition heuristic approach

An experimental study on the sound scattering of the ship's wakes

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Chinese Journal of Acoustics 1999年第3期18卷 217-225页

作者： HUI Junying ZHU Daizhu CAI Ping LIU hong (Underwater Acoustic engineering Departmetn, harbin engineering university harbin 150001)

The experiments for the sound scattering of the ship wakes are introduced in this article. The wakes are detected in both horizon and vertical in lake trials and its traces are shown in display model A or B, Its size and sound scattering strength are measured also. The scattering signals are analysed with the instananeous frequency sequence statistics methods

关键词： An experimental study on the sound scattering of the ship’s wakes

The Image Fusion Algorithm by Entropy Measure Based On Wavelet-Nsct

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The Image Fusion Algorithm by Entropy Measure Based On Wavel...

2010 Third Pacific-Asia Conference on Web Mining and Web-based Application (WMWA 2010)

作者： Li Yi-bingharbin engineering university harbin China Li Ao Liu Dan-dan harbin engineering university harbin China

Wavelet Nsct is a multi-scale image representation combined wavelet transformation and non-sub sampling, which is featured with a good translation invariance and multi-direction. Activity measure is the decisive measure in the process of the image fusion. It will decide the degree of clearness through certain feature information it abstracted. The traditional measure, which is based on multiresolution fusion, only takes every level of high frequency sub-band coefficients into consideration, neglecting the information provided by low frequency coefficients. Considering the impact that the integrated high and low frequency coefficients measure has on the activity measure, a fusion measure was proposed. It is based on Wave Nsct conversion, and with mask derived from the low frequency coefficients added to the general measure. Finally the fusion images of different measures and objective performance evaluations are provided. The results show that the fusion result of entropy mask measure is better than several other traditional measures.

关键词： entropyt image fusion activity measure NSCT analysis of multi-resolution

The crack tip fields of Mode Ⅱ stationary growth crack on bimaterial interface

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Journal of Marine Science and Application 2003年第2期2卷 11-16页

作者： TANG Li-qiang,LIU Chang-hai, and ZHENG Gui School of Civil engineering, harbin engineering university, harbin 150001 , China School of Civil engineering Harbin Engineering University Harbin 150001 China

A mechanical model is established for mode II interfacial crack static growing along an elastic-elastic power law creeping bimaterial interface. For frictional contact of boundary conditions on crack faces, asymptotic solutions of the stresses and strains of near tip-crack are got. It was shown that in stable creep growing phase, elastic deformation and viscous deformation are equally dominant in the near-tip field, the stress and strain have the same singularity and there is not the oscillatory singularity the field. Through numerical calculation , it is shown that the frictional coefficient η notably influence the crack-tip field.

关键词： an elastic-elastic power law creeping material near-tip field of mode Ⅱ interfacial crack the frictional effect

Study of Fuzzy Neural Networks Model for System Condition Monitoring of AUV

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哈尔滨工程大学学报（英文版） 2002年第2期1卷 42-45页

作者： WANG Yu-jia, ZHANG Ming-junCollege of Mechanical and Electrical engineering, harbin engineering university, harbin 150001 ,China College of Mechanical and Electrical engineering Harbin Engineering University Harbin 150001 China

A structure equivalent model of fuzzy-neural networks for system condition monitoring is proposed, whose outputs are the condition or the degree of fault occurring in some parts of the system. This network is composed of six layers of neurons,which represent the membership functions, fuzzy rules and outputs respectively. The structure parameters and weights are obtained by processing off-line learning, and the fuzzy rules are derived from the experience. The results of the computer simulation for the autonomous underwater vehicle condition monitoring based on this fuzzy-neural networks show that the network is efficient and feasible in gaining the condition information or the degree of fault of the two main propellers.

关键词： fuzzy neural network condition monitoring autonomous underwater vehicle

基于H^∞设计法的非线性舵鳍联合控制系统仿真研究

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系统仿真学报 2002年第8期14卷 1040-1044页

作者：于萍刘胜哈尔滨工程大学自动化学院哈尔滨150001

建立了首摇、横荡、横摇三个自由度的船舶运动方程。给出了随机海浪波高、横荡力、横摇力矩、艏摇力矩的仿真算法。介绍了干扰抑制的H∞线性系统设计方法。把非线性船舶舵鳍联合控制系统设计问题化为以二次型性能指标为目标函数的干扰... 详细信息

建立了首摇、横荡、横摇三个自由度的船舶运动方程。给出了随机海浪波高、横荡力、横摇力矩、艏摇力矩的仿真算法。介绍了干扰抑制的H∞线性系统设计方法。把非线性船舶舵鳍联合控制系统设计问题化为以二次型性能指标为目标函数的干扰抑制的H∞线性系统设计问题;基于H∞系统设计方法,进行舵鳍联合控制系统的设计。并用MATLAB语言完成了控制器的设计与仿真,仿真结果表明基于H∞设计法的舵鳍联合控制器在保证航向控制的同时。

关键词： H^∞设计法非线性舵鳍联合控制系统仿真船舶

A Research on the Development Strategies for Renewable Energy Consumption

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A Research on the Development Strategies for Renewable Energ...

2012 IEEE 3rd International Conference on Emergency Management and ManagementSciences(ICEMMS 2012)

作者： Si Wang School of Economics and Management harbin engineering university harbin China Guoyuan Han School of Economics and Management harbin engineering university harbin China Wentong Zhou School of Economics and Management harbin engineering university harbin China

Energy is an essential material basis for human society and also a basis element of the national economy. The efficiency of energy use and reasonable energy consumption is in relation to the socio-economic sustainable development. On account of global limited fossil energy reserves, all countries attach importance to the development of renewable energy. The paper uses Heilongjiang Province as a case to study the relationship between renewable energy consumption and economic growth of Heilongjiang Province. The results show that there is not a long- term cointegration relationship between economic growth and renewable energy consumption in Heilongjiang province. Economic growth is a direct result of the increase in renewable energy consumption, but the increase in renewable energy consumption can not lead to economic growth. From the gray comprehensive correlation degree view, economic growth and renewable energy consumption associated with a higher degree, so the role of renewable energy should not be ignored. Finally, based on Empirical findings, the development strategies of renewable energy are given.

关键词： energy consumption economic growth unit root test cointegration test Granger Causality Test