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软土地基中单桩抗拔试验及抗拔系数的确定

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施工技术 2006年第S2期35卷 32-34页

作者：马昉李恒太河北工程大学河北邯郸056021

由于抗拔力系数λ系经验取值,具有地域性、经验性和取值跨度大的特点,本文通过理论计算与抗拔试验结果的对比,探讨了λ的取值。试验结果表明:影响抗拔力的因素不仅仅是桩侧摩阻力,还包括桩身材料性质、泊松效应及桩周土的物理力学特性等。

关键词：桩基工程侧摩阻力抗拔系数

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Decision Method of E-Business Project Based on Rough Sets

Decision Method of E-Business Project Based on Rough Sets

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2008年国际电子商务、工程及科学领域的分布式计算和应用学术研讨会

作者： Lihua Ma~1 Huizhe Yan~2 Wanqing Li~3 School of Economics and Management,hebei university of engineering,Handan,hebei,056038,P.R.China

In order to solve the problem of E-Business project decision,a new decision method is proposed by analyzing project including uncertain ***,the set of factor is established including condition attribute and decision ***,experts qualitatively describe risk factors and establish a decision database,called decision ***,the attribute reduction algorithm based on Rough Sets is used to eliminate the redundant risk factor and its value of decision ***,the minimum decision rules are abstracted based on data mining *** method is more convenient and practical compared with the traditional one.

关键词： Rough Sets data mining attribute reduction E-Business decision method

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Vibration Pattern Recognition and Classification of Electric Generator in Power System Using Wavelet Analysis

Vibration Pattern Recognition and Classification of Electric...

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第二十七届中国控制会议

作者： Liu Jingbo 1,Wang Xiuqing 2 1.hebei university of engineering,Handan 056038,P.R.China 2.hebei North university,Zhangjiakou 075029,P.R.China

This paper presents an effective approach for multi-concurrent fault diagnosis based on integration of fractal exponent wavelet analysis and neural *** characteristics of a signal both in the time and frequency domains can be localized accurately by the wavelet *** the inter relationship of wavelet transform between fractal theory,the whole and local fractal exponents obtained from wavelet transform coefficients as features are presented to extract fault signals,which are inputted into radial basis function for fault pattern *** network structure and parameter identification are fulfilled by establishing the fault diagnosis model of electric-generator set and using the genetic *** faults are input into the trained wavelet network by choosing enough samples to train the fault diagnosis network and the information *** the type of fault can be determined according to the output *** paper discusses the robustness of exponent wavelet network for fault *** method can make the practical multi-concurrent fault diagnosis for stator temperature fluctua-tion and rotor vibration accurate and comprehensive.

关键词： Wavelet transformation Fractal theory Pattern recognition Neural network Electric-generator

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Adaptive Stator and Rotor Resistance Identification for Induction Machine without Rotational Transducer

Adaptive Stator and Rotor Resistance Identification for Indu...

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第二十七届中国控制会议

作者： Liu Jingbo 1,Wang Xiuqing 2 1.hebei university of engineering,Handan 056038,P.R.China 2.hebei North university,Zhangjiakou 075029,P.R.China

This paper introduces a new method of stator resistance identification based on wavelet network in order to improve the low-speed dynamic performance of induction motor in direct torque *** of the advantage of wavelet transform,the desired feature of the transient signal can be extracted conveniently from both the magnitudes and arguments of wavelet coefficients and the control precision for direct torque control can be *** input node of wavelet network is the stator current error and the change in the stator current *** output node of the wavelet network is the stator resistance *** wavelet network structure and parameter identification are fulfilled by the evolutionary *** in order to optimize the inverter control strategy,the accurate stator flux vector and electromagnetic torque are acquired by means of state *** experiment results show that this new method can efficiently reduce the torque ripple and current ripple and is better than that of the back-propagation neural network.

关键词： Induction machine Direct torque control Wavelet transformation Parameter identification Neural network training

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STUDY ON BUSINESS PROCESSES RE-engineering AND INFORMATION-BASED RISKING OF CONSTRUCTION ENTERPRISE

STUDY ON BUSINESS PROCESSES RE-ENGINEERING AND INFORMATION-B...

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2005年中国机械工程学会年会

作者： LIU Jun''e, LIU Jingyan, GU Hongyan, JIANG Hua (School of Management, hebei university of engineering, Handan, 056038)

＜正＞The full speed development of the information technology impels the construction to march towards informationization. Business Processes Re-engineering （BPR） is an important way of improvement for management. It is the inexorable trend to implement the Business Processes Re-engineering in enterprise’s information-based management. The informationization and Business Processes Re-engineering are conditional and they complement each other. There are many information-based risks in implementing BPR. The relationship of enterprise’s informationization and Business Processes Re-engineering are discussed in this text. The implements method of Business Processes Re-engineering based on information technology is put forward after analyzing to the competition of construction enterprise. The information-based risks in implementing BPR is fully estimated and appraised. The countermeasure of evading risk in implementing is provided. This article will contribute to promoting construction business administration towards informationization, modernization and scientific process.

关键词： construction enterprise business processes re-engineering informationization risk

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On The Understanding Of Risk Concept

On The Understanding Of Risk Concept

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首届风险分析与危机反应国际学术研讨会

作者： Guo Zhang-Lin Tian Jing Sui Hui-Qiang School of Economics and Management hebei university of engineering Handan 056038 China

＜正＞Risk is everywhere,and people have to cope with risks In order to establish a scientific theory of risk,three core problems should to be solved,there are how to define risk,how to express risk in a proper mathematical form and how to measure *** the basis of common understanding of domestic and foreign scholars on risk definition,a complete risk definition is presented based on the uncertain *** basic attributes of risk are given, including harmfulness,possibilities,dynamic, subjection and *** it has a detailed description of each attribute,especially harmfulness that is considered to be the essential attribute.

关键词： Risk Risk concept Risk attributes

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Feature Extraction Method in Fault Diagnosis Based on Wavelet Fuzzy Network for Power System Rotating Machinery

Feature Extraction Method in Fault Diagnosis Based on Wavele...

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第二十六届中国控制会议

作者： Kang Shanlin,Pang Peilin,Fan Feng,Ding Guangbin hebei university of engineering,Handan 056038,P.R.China

A new combined fault diagnosis approach for turbo-generator set based on wavelet fuzzy network is *** wavelet transform is used to extract fault characteristics and neural network is used to diagnose the *** improve the performance of applying traditional fault diagnosis method to the vibrant faults,a novel method based on the statistic rule is brought forward to determine the threshold of each order of wavelet space and the decomposition level adaptively,increasing the signal-noise-ratio（SNR）.The fault modes are classified by fuzzy diagnosis equation based on correlation matrix which shows good ability of self-adaption and *** improved least squares algorithm（LSA）is used to fulfill the net-work structure and the robustness of fault diagnosis equation is *** means of choosing enough samples to train the fault diagnosis equation and the information representing the faults is input into the trained diagnosis equation,and according to the output result the type of fault can be *** applications show that the proposed method can effectively di-agnose multi-concurrent fault for stator temperature fluctuation and rotor vibration and the diagnosis result is cor-rect,increasing the accuracy of the fault diagnosis for rotating machinery.

关键词： Wavelet transform fuzzy theory Fault diagnosis Signal de-noising Turbo-generator set

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Discussion about Desulfurization Technology and Management

Discussion about Desulfurization Technology and Management

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2010 International Conference on Advanced Measurement and Test (AMT 2010)

作者： ZHOU Ji-hong LIAN Yu WANG Bin 1 a 1 College of Urban Construction hebei university of engineering Handan 056038 China

Hydrogen sulfide is a kind of poisonous and harmful *** are a lot of desulfurization *** presents condition,features and application of desulfurization technology are introduced in this *** also point out that we should pay more attention to the desulfurization technology which will be *** several kinds of desulfurization technology and management methods are presented *** merit and fault of all kinds of desulfurization methods are proposed in this paper too.

关键词： hydrogen sulphide desulfurization pollution control technology management

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干摩擦板-复位弹簧系统隔震性能研究

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武汉理工大学学报 2010年第9期32卷 140-144页

作者：马丽慧王海霞河北理工大学河北省地震工程研究中心唐山063009

从理论上分析了干摩擦板-复位弹簧隔震系统的隔震性能,建立了设置隔震系统结构离散多自由度体系运动方程,并计算了一个设置隔震系统结构在地震作用下的动力反应。计算结果表明,应用干摩擦板-复位弹簧隔震系统以后,结构具有较长的自振周... 详细信息

从理论上分析了干摩擦板-复位弹簧隔震系统的隔震性能,建立了设置隔震系统结构离散多自由度体系运动方程,并计算了一个设置隔震系统结构在地震作用下的动力反应。计算结果表明,应用干摩擦板-复位弹簧隔震系统以后,结构具有较长的自振周期,隔震效果明显,楼层最大位移增加但沿结构高度分布趋于均匀化,最大层间位移值大幅度减少;依靠弹簧能够复位;接触面上的滑移摩擦作用能消耗传入上部结构的地震能量。决定隔震系统效率的关键因素是接触面摩擦系数与复位弹簧的刚度系数;接触面滑移摩擦系数与复位弹簧系数均取较低的数值时,隔震效率可以达到90%左右。

关键词：干摩擦复位隔震相平面层间位移

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基于GPRS的水资源数据远程监控系统研究

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节水灌溉 2009年第9期 55-57页

作者：刘洪建刘婧然河北工程大学信息与电气工程学院河北邯郸056038

介绍采用GPRS模块实现远程水资源数据监控的系统。各监控点的数据采集终端将采集到的数据信息传输到系统的监控中心,监控中心对传输回来的数据进行记录、存储、分析,并把需要的控制信息传送到监控点,从而实现水资源数据实时采集、处理... 详细信息

介绍采用GPRS模块实现远程水资源数据监控的系统。各监控点的数据采集终端将采集到的数据信息传输到系统的监控中心,监控中心对传输回来的数据进行记录、存储、分析,并把需要的控制信息传送到监控点,从而实现水资源数据实时采集、处理和控制。

关键词： UC/OS-II GPRS 嵌入式水资源数据

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