Abstract:Cold-formed thin-walled steel has large post-buckling strength under compression,effective width method and direct strength method are used to analyze at present.In this paper,with a comparison between the numerical example and experimental results,the different values of ultimate bearing capacity between the two methods and experimental results are found,effective width method given by the technical code of cold-formed thin-walled steel structure is conservative and the results of direct strength method are relatively close to the experimental results,in engineering direct strength method can be taken into account.

Abstract:Vibroplatform test is an important method to study seismic performance of engineering structure.Processing the similarity relation and deducing response of original mold correctly are very important.Taking one four-story frame building as an example,this paperdiscussed the similarity relation of the original model and enough artificial mass and without enough artificial mass,and earthquake response of the original model and model were calculated by using finite element programe;response of original model according to response of the model was deduced;the calculation result from basic natural vibration period,acceleration,velocity,displacement and structural base shear were compared.Finally,the correctness of dynamic similitude law at the elastic stag was validated.

Abstract:Dry jet mixing pile(DJM pile) is a method of the soft soil foundation treatment in strengthening treatment of soft soil Highway's roadbed,such as silt,mud silt,clay,silty soil,and so on.Those calculation methods of the pile-soil stress ratio and the bearing capacity of composite foundation were analyzed by according to the characteristic of bearing capacity and settlement for DJM pile composite foundation on Highway's Roadbed and bridge head embankment of highway.The results are significant for taking account of the effects of pile and soil in the design of the DJM pile composite foundation of highway's roadbed and bridge head embankment of highway.

Abstract:Soil corrosion data in Handan area which obtained from sampling and chemical analysis were analyzed.The corrosion of site soil was evaluated by using relevant software according as code for investigation of geotechnical engineering(GB50021-2001).The results showed that the site soil has medium,weak crystal corrosion and weak decomposition corrosion to concrete structure;Medium,weak corrosion to steel bar of reinforced concrete structure.From the research,the traditional view that there is no the corrosion of the site in Handan city is broken.

Abstract:Taking a deep excavation in Tianjin for example,the numerical simulations are progressed under different excavation time and space basing on the numerical analysis software FLAC-3D in this paper.The measured data is compared and the changes of horizontal displacement of wall,supporting force,bottom soil upheaval,and bearing capacity of piles during excavation with time and space were analyzed

Abstract:Deformation characteristics of soil samples in Tianjin city under unloading are studied through a large number of indoor consolidation-rebound tests.The critical unloading ratio R=0.2 where rebound happened and the unloading ratio R=0.9 where strong rebound happened are confirmed after analyzing the relationships of rebound ratio-unloading ratio and rebound modulus-unloading ratio.These two ratios can be used to estimate the depth of unloading influence area and strong rebound area.Therefore,the study in this paper can provide some guidance to design and construction in such unloading projects as foundation pit.

Abstract:By using the form of new rock micro-unit strength based on Twin Shear unified failure criterion,which satisfies weibull random distribution,a statistical damage constitutive model was developed.The parameters have been gotten by using the method for calculating the extremity of function according to the extremity characteristics of rock deformation curve.Comparison with the result of triaxial compression tests shows that this model can reflect well the relationship between stress and strain of rock.Through the discussion on parameters b、m andF0 in the constitutive damage model,it is found that the change of b has no effect on the pre-peak deformation curve and some effect on the post-peak softening phase;the value of m has some effect on the post-peak brittleness;the value of F0 has effect on the peak stress or rock strength.

Abstract:The elastic-inhomogeneous-ring method and beam-spring methods of internal forces calculations for the shield tunnel lining are discussed in detail.As a traditional method of shield tunnel lining designing,the elastic-inhomogeneous-ring is safe but conservative.Combining with a practical engineering example,its internal forces were calculated respectively by the two methods.The results of these two methods were compared and analyzed,and drew the conclusion that the beam-spring method for the designing of the shield tunnel lining is safe and economical.

Abstract:Finite element method as a very effective numerical analysis method applying in the analysis large-scale complex structure.This article introduced the space non-linear finite element analysis method,the iteration method and increases method which was often used in the analysis non-linear problem and their respective shortcomings were discussed.Mixed method which becomes by iteration method and increase method union,effectively solved shortcomings and insufficiencies of purely iteration method and increase method.Finally,the finite element computation to the engineering structure was carried out by applying the mixed method and its bearing capacity was analyzed.The results showed that the error of analysis space non-linear problem could be reduced.

Abstract:Based on the assumption that geogrid and its surrounding soils being a composite material,the effect of reinforcement of dam crest rockfill with geogrids is studied by using nonlinear elastic finite element method.The influence of layer number and modulus of geogrids on effect of reinforcement is investigated.The results indicate that reinforcement is helpful in increasing stability and earthquake-resistant ability of dam crest rockfill.It also shows that effect of reinforcement becomes more evident with more layers and increasing modulus of geogrid.

Abstract:In this paper,we discuss the problem of obtaining the piezoelectric actuator's optimal location and size on the smart structure.At first,the expressions of multi piezoelectric sensor and actuator equation and the expression of kinetic and potential energy were expressed,then construct the optimal rule of piezoelectric actuator's location and size according to the modal controllability and observability and the modal cost.Finally,we use a simply-supported beam to calculate the optimal location and size and establish finite element model of the beam with piezoelectric materials by ANSYS software.The vibration control of structure has become true through compiling the APDL(ansys parameter design language) program and using transient dynamic analysis.

Abstract:The electrical transmission tower is the main part of large complex lifeline system.Because of the difficulty to make the real time measurement and low precision of the data,the dynamic load inversion by the measured dynamic response becomes an effective way to measure the load indirectly.According to the measured dynamic response of tower-line coupling system in an electrical transmission tower with typhoon Matsa,the inversion of wind load distribution and dynamic tension history of ground wire and conductors are given basing on the inversion method of condensation series multi-freedom model.

Abstract:herelatiomhipbetween compaction energy and key sieve size passing percentage of 27 experi-ment gradings ale analyzed for SAC一20.ne passing percentage of 1.18ram sieve size has the greatestimpactoncompaction energy，thenhas thepassing percentageof 0.075ram sieve size，∞the conclusionthat fineaggregate gradingand itscontent(includingthe filler)hasgreat impact on compaction energy Canbeget.,111e average compaction numberdecreases with the increasing of thepassing percentage of 1.18mmand O.6mm sieve size.Wh∞the two passing percentage of the sieve size above increases into the restrictedzone of Superpave for the corresponding fine aggregate grading，the compaction number will be less，andthe mixture will becompactedH10l'eeasily，thiswill reduce the rut—resistanceperformance of mixture.Sothe restricted zone has definite rationality，and the passing percentage of key sieve size for fme aggregateshould be under the restricted zone.

Abstract:Based on analyzing the mechanism of dynamic replacement method for compacting foundation,,The experiment of the dynamic replacement sand pile were carried out by combining with the sea reclamation project of the Xiamen east sea area.The results on the dynamic experimental site showed that the treatment of the sand pile foundation of dynamic replacement gets the good effect and this method improves the foundation bearing capacity.

Abstract:In discussing architectural research method,there have always been a controversy between design and research,which is demonstrated as "research by design " and "research into the design," as embodied in the methods as "rule center" and "model center",traditional architectural research centre is rules and reflects the composition of the world,this trend makes architectural design and research separation,and specific studies splits into the science and philosophy,literature and art,the autonomy of the subjects were damaged,and the methodology of "research by design" define model,especially dynamic model as the center which shows the generation of the world,it will be able to remove the contradictions of"rule center" in specific circumstances,so the links between design and research can be improved and the autonomy of the subjects can be found.

Abstract:In the renewal and reform design of the bicycle workshop of Handan,this paper tried to refer to the "Organic Renewal" theory and provided an integral solution to this issue.The design considered the situation and requirement of the different part of the workshop,provided different solution and renewal extent to every part,and put some effort on the improvement of the outer space.

Abstract:The distribution rule of axis force and friction is studied basing on the stress values by test of anchor in PARS in Handan.The results show that the axis force of anchor along the anchoring is descending and there is a maximum moreover the range of variation small in the free-field and the changes along with time;the friction of anchor is increase along the anchoring and tinily along the free-field moreover immutability,the distribution in the large is uneven,the deformation of foundation pit and the friction of anchor increase along with the intensity of cement-treated soil.

Abstract:The flush regularity and the correlation of the main pollutants,the quality of rainwater from the main catchments of Handan were studied in order to realize the rainwater runoff pollution.It is helpful to control the runoff pollution of Handan.The results indicate that the runoff pollution of Handan is comparative severe.It is also affirmed that the first flush regularity of rainwater runoff is existent.Furthermore,SS has well linearity relation with COD,TN and TP.

Abstract:The test adopted the rapid sewage sanctifier for treating dairy wastewater with the coagulants of AS and PAC.Relation of dosage and the removal rates of turbidity and COD was investigated,and the optimized dosage of AS and PAC is 390 mg/L and 320 mg/L,respectively.At the same time,the synergism of the best inorganic coagulation PAC and organic flocculator polyacrylamide(PAM) in sewage treatment was studied,PAC(240 mg/L)+ PAM(0.5mg/L)is the best and the most economic combination.

Abstract:In view of the problem of seepage law which does not agree with the Darcy law,in this paper,both capillary experiment and core flooding have been made.The experiment of boundary layer in capillary and the influences of boundary layer on the porous flow in low permeability core are made.Finally,Factors affecting boundary layer are studied systemically.The results will have directive significances on the study of Non-Darcy porous flow in low permeability oil reservoir.

Abstract:The figure of the pore size distribution of the SEM was gained by using scanning electron microscopy and Matlab graphics processing software and combining the conversion methods of pixel size.The anthracite coal of Handan Tao Yi Mining Bureau was studied.The average diameter of medium hole and large hole R1、R2 and the number N1、N2 were accessed by using aperture classification.The changes of pore structure changes in the law under the different conditions of coal combustion temperature were studied.

Abstract:The thermal power generation or new and renewable sources power generation of CO₂ emission reductions are calculated basing on the evaluation methods of Carbon emission reduction potential,CO₂ emission reduction potential of power industry in Hebei province are obtained.The result indicated that carbon emission reduction potential of power industry is up to 3.562 million ton in Hebei province from 2006 to 2012,it is the key areas in implementation CDM projects in Hebei province.

Abstract:The initial investment and enhance the efficient of energy-savings will be reduced by Using assistant cooling composite ground source heat pump system.This paper introduces the climate and the overview of building energy consumption of hot summer and cold winter region and analyses the feasibility of ground source heat pump system using assistant cooling equipment in this region.Taking a building in Shanghai for example,the initial investment and operating cost between assistant cooling composite ground source heat pump system and no assistant cooling ground source heat pump system are compared.The results show that the assistant cooling-source heat pump system has great advantages in the reduction of initial investment and operating cost in this region.

Abstract:In this paper,a method of FDA for face recognition is presented basing on image segmentation.First,the original images are divided into modular images,which are also called sub-images;then,the well-known FDA method is directly used to the sub-images obtained from the previous step.The advantage of the represented way is that the local discriminant features of the original patterns can be efficiently extracted,and it is really true of the images that have large variations in facial expression and lighting.The ORL face image database is made use of to simulate,and when the training sample is only one,the recognition rate of 90.83 percent is achieved.

Abstract:A new digital image watermark algorithm of discrete wavelet transform was proposed to guarantee its robustness and security by combining with association memory ability of Hopfield neural network.First,the 2-level discrete wavelet transform was applied to the digital image,then Hopfield neural network disposed of and got back the extracted watermark repeatedly,so it could improve the extracted watermarking image to strength the robustness of the algorithm.Experimental results showed that this method could an resist against noise adding,JPEG compression,image cut and so on.

Abstract:According to geological conditions of 22208 coal face of Guoerzhuang mine,the paper has made a thorough study on the technology of large tilt angle compound mining,some countermeasures aiming at the problem of rib fall,support tilt and coal mining machine downslide were proposed.The safe production is ensured.The technical and economic benefits are obvious and the results provide methods and experience on the large slope angle coal-mining faces.

Abstract:There are many hollow areas underground of Dongjiagou coal mine.Due to construction,the distributions of these areas are detected by seismic CT(Computed Tomography) technology.CT technology of elastic wave which adopts the basic principle of section X-ray scanning is a kind of new method of geophysical exploration.We can get the distribution information of physical parameters of rocks or soil underground by different responses of boundaries to elastic wave.Thirty-four hollow areas are delineated in the study area of Dongjiagou coal mine by CT detecting and some other information.From drilling testing,the exact ratio of location reaches 87.5%.

Abstract:The hydro-chemical characteristics and distribution of groundwater with high fluorine in Longyao are revealed according to the date from chemical analysis of the groundwater,and the formation of the groundwater is discussed through the condition of stratum,physiognomy,and hydro-geochemistry,weather.The condition of stratum is the foundation,and physiognomy,and hydro-geochemistry,weather are the main influencing factors to decide the background contain of the formation of the groundwater in Longyao.Moreover the formula distinguished high,low fluorine groundwater has established and that can be consulted to seek,exploit low fluorine groundwater resource in this region.

Abstract:The quantities of bacterioplankton and Chl-a were invested in Bohai Bay from May 2005 to October 2005.The results showed that the correlativity between bacterial abundance and Chl-a's concentration was high in October(r=0.845,p0.01) in surface layer water of Bohai Bay.The percentage of marine bacterial biomass was 0.355%～56.25% during the primary productivity of phytoplankton;The spatial change of BB/PB was higher in offshore than inshore.Exogenous organic matter was an important factor in controlling the distribution of bacterioplankton in August,but it was primary production in October.

Abstract:In this paper,wavelet scaling functions are used to construct the triangular and rectangular wavelet element by analyzing the characters of B-spline wavelet.Based on this,the computation expressions for solving the plane problems are presented,which is a new computing method for solving the plane problems.The results obtained in this paper are compared with those by theories and by Ansys,the numerical example illustrate that the wavelet-based element method has better convergence and higher accuracy.

Abstract:In this paper,attribute significance weight is defined which measures the contributions of attributes to distinguishing the different element categories.a heuristic algorithm which aims to search reduction is obtained by using the weight as heuristic knowledge.The complexity of the algorithm is polynomial,the convergence is fast and the result is Pawlak reduction.