Abstract:Early age cracking has been an ever-present problem during the application of recycling coarse aggregate concrete.Influences of recycling coarse aggregate size( 5 ~ 15mm,15 ~ 25mm and 25 ~ 31.5mm) on early age( age: 0 ~ 24h) cracking tendency of recycling coarse aggregate concrete( RC) and recycling coarse aggregate concrete with fly ash( FRC) were studied based on slab test method.The results of the early age cracking indexes and cracking processes indicate that the large aggregate size( 25 ~ 31.5mm) corresponds to the decrease of cracking damage for recycling coarse aggregate concrete targets,the slab test samples with 15-25mm of recycling coarse aggregate size has the optimum efficiency in terms of anti-cracking ability when comparing to the other two kinds of FRC samples for RC samples with 15% fly ash.The experimental result in this paper is very beneficial to the optimization and design of recycling coarse aggregate concrete on anti-cracking mix proportions.

Abstract:In view of the rich resources of fine sand in Handan area,the contrast test were carried out by using different water-binder ratio( 0.8,0.7,0.6,0.7) and the influence of fine sand ratio on low strength concrete workability and compressive strength of influence were studied.A lot of experimental results showed that the fine sand influenced on concrete workability,especially relatively low water-binder concrete influence was greater; Water-binder ratio remains unchanged,28 d compressive strength of concrete increased with the of sand ratio; When the sand ratio increased to a certain range of values,28 d compressive strength of concrete decreased with the increase of sand ratio; Fine sand conforming to the requirements concrete of the workability and strength can be formulated through Choosing the reasonable sand rate.

Abstract:Based on the three-tower suspension bridge,the effect of elastic cable parameters on anti-seismic performance are compared by using finite element method.In the longitudinal direction,elastic cables are set between the middle tower and the main girder to restrict the longitudinal relative displacement.Different parameters of elastic cables are employed to compare and analyze the bridge response results in terms of the internal forces of the tower bottom and displacement of the girder end.The analysis results showed that the reasonable stiffness of elastic cables can obviously decrease the displacement of girder end,the top displacement of towers and the relative displacement between the middle tower and main girder.Meanwhile,it also can decrease the internal forces of the side tower bottom,but slightly increase the internal forces of the middle tower bottom.Elastic cables are introduced mainly to provide structural system with elastic stiffness other than energy dissipation.Distribution inertial forces of the structural system are more reasonable by changing the transform path of inertia forces.

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Abstract:Concrete filled steel tubular( CFST) truss girder is a new composite structure,for which the concrete strain status is defined as a key index of structural behavior.However,the member slenderness and the tube diameter of chord are so small that it is rather difficult to measure concrete strain.Based on experimental study on structural behavior of CFST truss girder,a kind of embedded concrete strain gauge with accessory location adjustment configuration are developed,and the special mix method for self-compacting concrete with normal strength grade and concrete pouring technique are also designed.It is verified by the experimental test that,the concrete strain measuring technology developed for infilled concrete of small-diameter but slender CFST members can help to minimize structural injure,cut cost and is convenient for engineering design and construction.The technology can be further applied for experiment of laboratory small scale model and in-situ construction of new composite structures like CFST truss girders.

Abstract:Human errors are inevitable in steel structure constructing process.They would produce a negative effect on the quality of constructions.There are many factors likely to cause human errors.This paper concludes human-error factors in constructing process of steel structures.Then the importance of these factors can be analyzed by AHP( Analytical Hierarchy Process) method.Afterwards, the importance ranking vector of factors can be acquired.The ranking vector can direct engineers to control human-error factors in constructing process and allocate resource reasonably.Then the safety of steel structures can be ensured.

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Abstract:With the excavations developing for deep and large,the control of the excavations deformation become very stringent and the deformation control of excavation have became the primary factor in excavations design.This paper has analyzed muti-factors in excavations' design basing on the single-factor,an orthogonal design test of excavation deformation is carried out considering 8 factors and 4 levels in FEM simulation.Analysis of 4 indexes of the ground settlement,foundation settlement disparity,maximal lateral displacement of wall and upheaval in the bottom of the excavation are made, discussing the sensitivity and eminence of these factors.It is concluded that the strut distance,excavation depth and the soil stiffness are the main parameters which control the excavations deformation, while other parameters have little influence on excavations deformation

Abstract:Large differential settlement occurs on a Taiping Market near Nanjing Changfujie Subway Station foundation pit during construction of the deep foundation pit.Factors in influencing the differential settlement of building according as several main construction stages,base of building,and soil condition are analyzed based on the measured data and software Plaxis 2D.The results show that the north building is too old and base of building has a lower sustainability,which make major differential settlement occur on the building.Therefore,the solution to problem is to rise axial force again and increase density of steel brace.

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Abstract:At present,the alarm value in different areas is determined by the main specification and engineering standard provisions,which adopts the extremely strict unified control standards,but it is difficult and uneconomical for the project construction.In this paper,through statistical analysis of monitoring data obtained from the construction process of foundation pit engineering in the southeast coastal area,some suggestions are proposed the aspects of retaining structure horizontal deformation on monitoring alarm value set.The results would provide reference for future engineering safety monitoring.Based on the safety of projects,it reduced successfully many unnecessary alarm events.

Abstract:The dynamic shear rheological test was used to evaluate the aging condition of asphalt binder,with varying mix process.Test results showed that the aging condition of foamed asphalt was lower,and the road performance of asphalt mixtures must be affected.Performance tests were implemented for the medium-grain asphalt concrete( HMA-AC-20,FWMA-20-RAP,FWMA-20) with the same gradation.As a result,foamed asphalt mixtures manifested better compaction,and better moisture-damage resistance.The fatigue cracking and low temperature cracking resistance was better than HMA-AC-20,while dynamic stability of compacted foamed asphalt mixtures increased a lot after joining the RAP,but it was still for behind the HMA-AC-20.

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Abstract:The artificial water systems is one of important contents of Dongjing capital construction in the Northern Song Dynasty,the article carries on the traditional culture tracing to the capital Dongjing 's water system construction in the Northern Song Dynasty.At the view of three angle explanation including the Confucianism,Taoism and the zen,philosophic thinking-harmony between man and nature,the influence of many kinds of connotations on building the water system were discussed.The design methodology in the process of building river system,which manifested the respect nature, made use of favorable conditions and avoided unfavorable conditions,were shown.The artistic creation thought between the human and the nature and the imperial palace moat,the natural pond-middle of the water palace still had the model significance as representative's principle water culture mark to the urban construction nowadays

Abstract:Farming culture is an important part of Chinese culture,which is of great importance for the development and heritage of culture.The paper introduced the connotation and main characteristics of the traditional farming culture and analyzed the main way of landscape expression of farming culture.Then the Huaiyang Wugu platform landscape design was cited as an example to show that in the agricultural landscape design we should analyze in-depth the farming culture connotation and retain farming culture gene and express the farming culture through the comprehensive ways of " entity", " thing", " conception".

Abstract:Huazhou Academy in Dengzhou,which was founded in Northern Song Dynasty by Fan Zhongyan.And it has been complete repaired and preserved by past dynasties.Through analysis of the characteristics of the site selection,the space pattern,the artistic technique,and the landscape features which adjust measures to local conditions rites and music and the appropriate scale were discussed.The results could provide reference for the study of the academy gardens

Abstract:The integration of spin reflux reactor was adopted to treat restaurant wastewater,and the corresponding start-up process was investigated.During the startup of the intermittent operation mode was adopted for the sludge domesticated.Aeration time is eight hours.Settling time is half hour.Discharge time is one hour.Under the condition of air remain unchanged,the sludge of the system was cultivated by gradually increasing sludge load,and the start-up process was completed in only 20 days.The removal of COD,NH⁺₄-N,TN,TP reached 91.81%,81.57%,54.73% and 83.97%.The main pollute discharge target achieves cities sewage treatment plant pollutant discharge standard( GB18918-2002) the second standard

Abstract:In the process of high concentration organic wastewater treatment,there are lots of biogas.As the main component of biogas,CH₄is not only greenhouse gas,but also a kind of recovery clean energy.Adopting methodology AMS.Ⅲ.H of CDM,the emission reductions of the project in brewery in Hebei Handan are calculated.The result shows that the emission reductions of this project will reach 55,485 tCO₂/ y.Besides,its capital gains will be 12.5%.So implementing emission reduction technology in the field of high concentration organic wastewater treatment has obvious environmental and economic benefits.

Abstract:This article was based on the function of urban rivers and ecological management of urban rivers and abroad understanding of the concept model.According to urban river ecological management theories and principles Summary constructed Chan-Ba River ecological pattern were constructed by taking example of content of the Chan-Ba River ecological management.Through this mode of governance,the regional social,economic and ecological benefits were proved being good.The governance model will guide the implementation of the " eight Hydra Xi'an" plan and provides a theoretical basis and reference for the Northwest region urban water remediation,it would have wide application prospect.

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Abstract:Due to the great mount of sluice gates with the middle route of the South to North Water Diversion Project,it's hard to avoid operation on and off of sluice gates.This paper use the SWMM model to simulate varies conditions water parameters,including the changing rule of depth of water after the sluice gate under different operation conditions.The results show that faster of gates speed and the opening height is,greater the water level wave changes

Abstract:REE geochemical characteristics of high-alumina partings,from Taiyuan Formation of Carboniferous in Jungar Coalfield,were studied by using ICP-MS.The results show that the REE contents range from 2.63 to 345.56μg / g,and the average 61.83μg / g.The ratios of LREE / HREE range from 0.56 to 25.64,and the average 5.56.These characteristics show that LREE are much richer than HREE.REE distribution patterns of samples are characterized by obvious negative Eu anomaly.REE is not obviously effected by diagenesis of the high-alumina partings according to the bad relativity between δCe and δEu,( Dy / Sm) N,ΣREE,respectively.According to the characteristics of δCe and Ce_anomvalues,it can be concluded that the sedimentary environment of high-alumina partings is mainly continental oxidized water conditions.The characteristics of REE show that the material source of high-alumina partings are from Yinshan ancient continent,and its provenance are mainly Caledonian-Hercynian granites,such as plagioclase granites,adamellites,moyites and aplitic granites,and bauxite deposits from Benxi Formation.

Abstract:Lianshao coalfield,which tectonically belongs to the northwestern margin of the Caledonian fold belt,is located in the central of HunanProvince.This era mainly has both thrusting nappe structure and gravitation gliding tectonics,and sedimentary cover has strongly tectonic deformation.There exists a close relationship between coal measures occurrence and coal controlling structure styles.Lianshao coalfield is divided into three coal-bearing areas,according to the characteristics of coal measures occurrence、coal-bearing deposit and fault structure.Based on the geometrical morphology and formation mechanism of the coal-bearing areas,the authors put forward a scheme of division for the coal-control structural pattern,which can be divided into three major types,eight subtypes.

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Abstract:This paper analyses the secondary development tools of AutoCAD and gives a detail comparison with GIS solutions.Then the paper gived a solution to implement the mining equipment layout and location functions,which is by the way of AutoCAD secondary development and the develop tool is VBA.The problems that how to set up the connection between equipment block and remote database based on VBA in AutoCAD and how to establish a dynamic response mechanism in AutoCAD and external remote database are solved,In Addition,how to pack VBA program are illustrated.Through the development and apply of the coal mine underground equipment layout system,the idea to achieve the visual management are proved being feasibility.The system has certain applied value in equipment position and information management based on AutoCAD.

Abstract:The frequently occurring of accidents in underground coal mine demands the accurate location of mine personnel.However,the localization by the improved weighted centroid localization algorithm is not accurate.From this point of view,this paper proposes an improved centroid localization algorithm in underground coal mine based on the improved weighted centroid localization algorithm.The new algorithm takes the centroid as new anchor node and products new anchor nodes and centroid many times to conduct the localization.The simulation results show that the proposed algorithm can reduce the mean error of location and improve the accuracy of localization algorithm.

Abstract:To establish three-dimensional control networks of coal mine accurately,an approach to employ different instruments was proposed,which included GPS,magnetic gyro,leveling,tatal station,etc.A coal mine was taken as an example to prove the practicability of the approach,and the main steps and technical specifications for the implementation of the fourth-grade leveling and 7″ traverse underground networks were given simultaneously.The principal works include the networks establishment with E-grade GPS overground,and 7″ traverse and the fourth-grade leveling underground,and gyro-orientation,for providing a theoretical basis for networks establishment underground and giving a reference to other similar coal mine.

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Abstract:In order to ensure the safety of the hydropower station with long water transportation system while load changing,based on unsteady flow differential equations of pressure and characteristic-line method,a pipeline a numerical simulation model of the water power station with one chamber and four hydraulic turbine sets is built with SIMULINK of MATLAB platform.With the numerical model,the simulations of the hydraulic transition process of Muzhati hydropower station are conducted.The highest and the lowest surge,the rate of rise in maximum rotor speed of turbine set,the most pressure in spiral case inlet are calculated.The results show the large generator unit is a major gating factor during the hydraulic transient process in the complicated hydraulic station composed by different turbine sets.

Abstract:The key frame extraction is one of the key technologies in Content-based video retrieval( CBVR).In order to extract self-adaptively and effectively the key frames in the video,this text proposes an algorithm of key frame extraction basing on improved three-dimensional ant heap.First, this algorithm extracts three-dimensional feature vectors from color space of H-S-V for every frame and shows them as the points of three-dimensional European Space.Then,we divide all the frames into clusters through the algorithm of improved three-dimensional ant heap to extract the key frames in video.Through simulating the new arithmetic through the MATLAB and comparing it with the traditional arithmetic,results show that the recall ratio and precision ratio are improved in some extent.

Abstract:For the problem of short children,an intelligent diagnosis expert system is established based on neural networks.The index system of evaluation for short children is proposed.The back propagation network structure parameters are optimized by using genetic algorithms and a new intelligent diagnosis model is established by using back propagation neural network.The experiment results show that the new algorithm can overcome the local convergence and feebleness of generalization ability of back propagation algorithms.This method is superior to the other algorithms in the aspects of accuracy and accelerating convergence and is suitable for the computer-aided diagnosis of short children

Abstract:For the influence of vibration and noise problem of switched reluctance motors,the paper applies maxwell stress method,considering the magnetic saturation of ferromagnetic materials and the edge effect of flux,analyzing and calculating the flux density of air gap and electromagnetic force.The nonlinear mathematical model of magnetism and solid coupling of the stator system is set up.This model conforms to the actual operation characteristics of switched reluctance motor,provides the theoretical reference for optimizing design of the motor.With a prototype as an example,results show that the model of the 2D finite element analysis of the results compared to verify the correctness of the mathematical model.

Abstract:The inner mast of Lifting equipment is selected as research contents,the Solidworks software is used as the 3D solid model establishment,then the model of inner mast is imported into ANSYS Workbench to finite element analysis and to get the equivalent deformation and stress contours clouds which the inner mast under the most dangerous condition,it's intensity and stiffness meet to the requirement of design.Then regard section size of column as design variables,its intensity and stiffness are constraints,the minimum mass is goal,multi-objective optimization design is carried out on the inner mast.The results show that not only the inner mast after optimization in quality is reduced by 12%,but also the static characteristics are improved,which provides reference for the improvement of the inner mast

Abstract:Considering the presence of shortage cost,this paper studied the revenue-sharing contract of a three-level supply chain with a manufacturer,a distributor and a retailer.Firstly it analyzed the situation of the performance of the supply chain without the revenue-sharing contract,and then discussed the revenue sharing contract under the constraint mechanism of retailers,distributors and manufacturers optimal decision,and then the author discussed how to achieve the coordination of the supply chain.Finally through the case analysis,we focuses on the influence of the profit of the supply chain members with different revenue sharing coefficient

Abstract:In order to resolve the critical chain project management issues which affect the overall interests of the enterprises,this paper puts forward the concept of sub critical chain group.This concept minimizes sub project sum as the goal in the multi project.Based on single critical chain project management,the conflicts in priority allocation of resources projects were analyzed,and the distribution rules which limit the time for a project to reach the minimum value.At the same time,draw a combination scheme which maximizes the overall interests of the enterprise through the rational allocation of project priorities,and this scheme is verified by practical examples.

Abstract:A least-squares finite element method for upper-convected Maxwell flow is proposed.The constitutive equation of a steady-state incompressible creeping model is linearized by using the approximations of velocity and stress.Least-squares functional involve the L²-norm of the residuals of each equation multiplied by a proper weight.The problem is transformed into minimize this functional.Euler-Lagrange equation corresponding to the least-squares functional is used to obtain the iterative equation.Finally this equation is solved by finite element method.