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Co-adaptability solution to conflict events in construction projects by segmented hierarchical algorithm

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Science China(Technological Sciences) 2008年第7期51卷 932-939页

作者： HOU XueLiang1 & LU Mei2 1 Department of Construction Management, Tsinghua university, Beijing 100084, China 2 College of Management, xi’an university of Architecture and technology, xi’an 710055, China Department of Construction Management Tsinghua University College of Management Xi’an University of Architecture and Technology

In order to seek the co-adaptability solution to conflict events in construction engineering projects, a new method referred to as segmented hierarchical algorithm is proposed in this paper by means of comparing co-adaptability evolution process of conflict events to the stackelberg model. By this new algorithm, local solutions to the first-order transformation of co-adaptability for conflict events can be obtained, based upon which, a global solution to the second-order transformation of co-adaptability for conflict events can also be decided by judging satisfaction degree of local solutions. The research results show that this algorithm can be used not only for obtaining co-adaptability solution to conflict events efficiently, but also for other general decision-making problems with multi-layers and multi-subsidi-aries in project management field.

关键词： conflict co-adaptability segmented hierarchical algorithm

Microwave Synthesis of Cathode Material Li_xMn_2O_4 for Lithium-ion Battery

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Journal of Wuhan university of technology(Materials Science) 2002年第4期17卷 36-38页

作者：郝华 School of Materials Science and Engineering Wuhan University of Technology Wuhan 430070 China

LiMn 2O 4 was synthesized rapidly by microwave *** product phases of the microwave synthesis and conventional solid-state synthesis were comparatively *** capacity of microwave synthesis product decreases relatively *** lithium ion can be inserted into and extracted from the spinel framework structure fluently after *** the capacity of the conventional solid-state synthesis product is more remarkably *** spinel framework structure was destroyed which hindered the lithium ion from inserting and *** influential factors of the process parameters are discussed such as heat preservation time, pre-heating at 400℃ for 24h and coupled agent.

关键词： microwave synthesis lithium ion battery spinel framework

Implementation of Network Intrusion Detection System Based on Density-based Outliers Mining

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微计算机信息 2005年第23期 83-86页

作者： Huang GuangqiuPeng XuyouLv Dingquan (xi′an university of Architecture & technology, xi′an 710055)

The paper puts forward a new method of density-based anomaly data mining, the method is used to design the engine of network intrusion detection system (NIDS), thus a new NIDS is constructed based on the engine. The NIDS can find new unknown intrusion behaviors, which are used to updated the intrusion rule-base, based on which intrusion detections can be carried out online by the BM pattern match algorithm. Finally all modules of the NIDS are described by formalized language.

关键词： Outliers mining Density Intrusion detection CBN:TP309.5 LITERATURE IDENTIFICATION CODE:A

Preparation of Sialon Powder from Coal Gasification Slag

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Journal of Wuhan university of technology(Materials Science) 2010年第6期25卷 1044-1046页

作者：汤云 State Key Lab of Western Architecture & technology(Cultivating Base) Xi'an University of Architecture & Technology

X-ray fluorescence spectrometry（XRF）,X-ray powder diffractometry（XRD） and scanning electron microscopy（SEM） were used to characterize the chemical composition,phase constituent and microstructure of the coal gasification *** powders were synthesized by carbothermal reduction and nitridation using the coal gasification slag as raw *** experimental results showed that glass and amorphous carbon were the main phases,quartz and calcite as minor crystalline phases were also presented in porous coal gasification *** constituents of coal gasification slag were SiO2,Al2O3,CaO and residual *** powder with Ca-α-Sialon as main crystalline phase can be synthesized when coal gasification slag powders were reduced and nitrided at 1500 ℃ for 9 h using nitrogen flow of 500 ml/*** coal gasification slag is a valuable and economic starting material for preparing Sialon powders.

关键词： coal gasification slag characterization microstructure Sialon carbothermal reduction and nitridation

Coupling analysis of unsteady seepage and stress fields in discrete fractures network of rock mass in dam foundation

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Science China(Technological Sciences) 2011年第S1期54卷 133-139页

作者： CHAI JunRui 1,2 & XU WeiSheng 2 1 College of Hydraulic and Environmental Engineering,China Three Gorges university,Yichang 443002,China 2 College of Hydropower Engineering,xi’an university of technology,xi’an 710048,China College of Hydraulic and Environmental Engineering China Three Gorges University College of Hydropower Engineering Xi"an University of Technology

The drag force of water flow through single fracture and the coupling characteristics of seepage and stress in single fracture surface are analyzed,and a three dimensional model of coupled unsteady seepage and stress fields is *** model is used to the analysis of foundation rock mass of a high *** the coupling effects are considered,the changes of boundary heads have less influence on the inner head of rock mass,and the strong permeability of main fractures *** the coupling effects are not considered,the fractures distribution affects the inner head more *** the upstream water head declines,the inner head of dam foundation slightly declines and the hydraulic gradient distribution becomes smoother.A bigger upstream water level declining velocity has a stronger lag effect,meanwhile the values of stress components change more *** the upstream water level declining velocity directly affects the stability of rock mass in dam foundation and we should take into account the above factors to make sure the safety of the dam during reservoir level fluctuation period.

关键词： hydraulic engineering unsteady seepage stress coupling fractures network rock mass

Appropriate Strategies for Rural Houses In Northwest China

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湖南大学学报（自然科学版） 2009年第S1期36卷 167-171页

作者： HE Quan,LIU Jia-ping,LU xiao-hui,YANG Liu(School of Environmental & Municipal Engineering,xi’an university of Architecture and technology,xi’an,Shaanxi 710055,China) School of Environmental and Municipal Engineering Xi'an University of Architecture and Technology Xi'an 710055 China

To avoid the old road of urban development with high consumption and high pollution,this paper took the houses in a village near Yinchuan(a typical city of Northwest China)as an exemplary project to explore the appropriate strategies in the arid cold climate for the sustainable development in rural undeveloped areas Northwest ***,all houses were designed according to the principles of passive solar ***,optimized biomass energy technologies such as biogas pit and straw gasification stove were utilized for cooking or *** but not the least important,the ecological building materials such as earth,straw bale,fly ash were used to construct houses,which improves the indoor thermal comfort and meanwhile lowers the negative impact on the *** costs,easy accessibility and habitants' inclination were taken into account in the process of design.

关键词： appropriate strategies arid-cold climate passive solar heating optimized biomass energy ecological building materials

The structure of L*-inverse semigroups

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Science China Mathematics 2006年第8期49卷 1065-1081页

作者： REN Xueming & SHUM Karping Department of Mathematics, xi’an university of Architecture and technology, xi’an 710055, China Faculty of Science, The Chinese university of Hong Kong, Hong Kong, China Department of Mathematics Xi'an University of Architecture and Technology Xi'an 710055 China Faculty of Science The Chinese University of Hong Kong Hong Kong Hong Kong

The concepts of L*-inverse semigroups and left wreath products of semigroups are introduced. It is shown that the L*-inverse semigroup can be described as the left wreath product of a type A semigroupΓand a left regular band B together with a mapping which maps the semigroupΓinto the endomorphism semigroup End(B). This result generalizes the structure theorem of Yamada for the left inverse semigroups in the class of regular semigroups. We shall also provide a constructed example for the L*-inverse semigroups by using the left wreath products.

关键词： L*-inverse semigroups type A semigroups left regular bands left wreath products.

Dynamic Analysis of PWM Switching DC-DC Converters

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Dynamic Analysis of PWM Switching DC-DC Converters

A NEW METHOD OF DETERMING SOURCE TERMS OF POISSON EQUATIONS FOR GRID GENERATION

CES/IEEE 5th International Power Electronics and Motion Control Conference

作者： Liu Jian Wang Yuanbin xi’an university of Science & technology/ School of Electrical & Control Engineering xi’an China School. of Electrical & Control Engineering Xi''an University of Science and Technology Xi'an China

ISBN: (纸本)1424404487;9781424404483

＜正＞The dynamic behavior of DC-DC converters is analyzed on the basis of a state-space averaged model including the feed back loop. The low frequency ripple behavior of DC-DC converters is analyzed in s filed. A buck DC-DC converter is used as an example. The condition causing oscillation and impulse during starting period and in case of input perturbation is obtained. The output to input voltage transfer function in the feedback loop is deduced. The stability requirement is obtained based on Hurwitz Stability Criterion. The frequency and amplitude of the low frequency ripple voltage are determined by using zero-pole analysis method. The proposed approach is verified by simulation and experiment results.

关键词： switching converters Pulse Width Modulation (PWM) dynamic analysis stability low frequency ripple voltage

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Journal of Hydrodynamics 2000年第1期12卷 16-21页

作者： Wei Wen li, Wang De yi, Zhang Zong xiao, Liu Yu ling xi′an university of technology, xi′an 710048, P.R.China xi'an Univ of technology Xi'an China

This paper is concerned with a new method to determine the source terms P and Q of Poisson equations for grid generation, with which a satisfactory grid can be obtained. The interior grid distribution is controlled by the prior selection of grid point distribution along the boundary of the region, and the orthogonality condition in the neighborhood of the boundary is satisfied. This grid generation technique can be widely used in the numerical solution of 2 D flow in rivers, lakes, and shallow water regions.

关键词： Poisson equations grid generation weighting functions