Abstract: The application of 4D-CAD(Computer Aided Design) technology in AEC(Architecture Engineering Construction) industry has achieved great benefitsHowever,in current practice,3D models are created in plan phase,and 4D simulation is simply used as a plan tool prior to constructionIn order to expand the usage of 4D simulation to construction phase,3D models for 4D simulation were analyzedEspecially,construction model and real-time construction model were comparedThe technology for the automated generation of BIM(Building Information Modeling) models was also discussedIt was found that BIM real-time construction model was capable of tracking the progress of the project dynamically with less human effortDynamic 4D simulation of real-time construction based on BIM was proposed as an effective tool for dynamic construction management to improve the efficiency of construction

Abstract: To find a simple way to isolate the constituents of Lonicera japonica,selective extraction methods were employedCompound Ⅰ was isolated from the ethyl acetate extract of Lonicera japonica by the selective extraction,then compounds Ⅱ,Ⅲ and Ⅳ were isolated from the remaining ethyl acetate extract by silica gel column chromatography successivelyTheir structures were elucidated by means of physico-chemical properties,MS,IR and NMR evidences as 3′,4′,5′,5,7-Pentamethoxy flavone(Ⅰ),luteolin(Ⅱ),quercetin(Ⅲ) and chlorogenic acid(Ⅳ),respectivelyCompound I was found in this genus for the first time,and it was isolated with the selective extraction which is advantagous over the traditional column chromatograph

Abstract: Obstract: [Objective]To investigate the association between DNA repair gene XRCC1Arg399Gln polymorphism and susceptibility of hepatocellular carcinoma(HCC).[Methods]Polymerase chain reaction-restriction fragment length polymorphism(PCR-RFLP) was applied in 113 HCC cases and 113 normal people from the same high incidence areas in Guangxi,to evaluate the relationship between XRCC1Arg399Gln genotypes and HCC incidence.[Results]The frequency of Arg/Gln and Gln/Gln of variant genotype XRCC1399 in HCC group and control group were 29.20% and 14.16%,respectively(P 0.05);while the frequency of Arg/Arg of wild genotype XRCC1399 in HCC group and control group were 70.79% and 85.84%,respectively(P 0.05).[Conclusion]The polymorphism of XRCC1Arg399Gln might contribute to the incidence of HCC in Guangxi.

Abstract: In order to study the interface bond-slip performance of recycled aggregate concrete-filled square steel tube(RACFSST),ten specimens made from waste concrete were designed for tests.The parameters concerned were concrete strength grade,embedded length and recycled coarse aggregate replacement rate.The load-slip curves of square steel tubes and recycled aggregate concrete were obtained,and the influence of the parameters on starting bond strength and ultimate bond strength were analyzed.The results show that there were four stages in the load-slip curves of RACFSST,including no-slip,stress rising,stress mutation and stress dropping.The replacement rate had a slight influence on the starting bond strength and ultimate bond strength,while the embedded length had the opposite effect.The specimens with shorter embedded length had larger bond strength.The concrete strength had a relatively large influence on them.

Abstract: An hot in-place recycling technology was applied to Xinxiang-Zhengzhou section of Beijing-Zhuhai expressway to study the application of the technology in asphalt pavement maintenanceBased on the detection results of old asphalt mixture,the performance degradation of asphalt and aggregate in the old asphalt mixture was analyzedThe reasonable mixing amount of recycling agent and fresh asphalt were determined by performance experimentsThe gradation of aggregate in old asphalt mixture was redesigned by adding new aggregateThe practical application results show that performance indexes of hot-in-place recycling of old asphalt mixture meet standard requirements

Abstract: To solve accurate trajectory planning and control problem of the intelligent excavator with good manipulating stability,the kinematic and dynamic models were proposed based on the excavator arm.By programming Matlab codes,overcoming the influences of coupling,multi parameter and disturbances of load,the Cerebellar Model Articulation Controller(CMAC) neural network is presented,which could approximate the dynamic model of excavator arm and get more effective results in trajectory control.The experimental results demonstrate that the proposed controllers have better control performance in simulation of trajectory,and the CMAC control strategy can achieve the real-time and accurate control of the excavator.

Abstract: In order to study the development of cracks on cement-stabilized macadam base during highway construction,according to the actual loading data and the mechanical parameters of cement stabilized macadam material with different cement dosage measured by the vibration method,the bottom tensile stress of different sub-base structures was calculated by Bisar 3.0 and the shrinkage crack width of the base was analyzed by a shrinkage cracking model based on the friction restraint of elastic foundation.The results show that the seven-day split strength of cement stabilized macadam is larger than the suggested value given by the current code for design of highway asphalt pavement.On the condition of the same cement dosage,the crack width of the base with graded gravel sub-base is smaller than that of the base with lime-flyash soil sub-base,but the maximum bottom tensile stress is much higher than that of lime-fly ash soil sub-base.When graded gravel is used for sub-base,the weight of construction vehicle is suggested to be less than 35 tons and the cement dosage of the base should be more than 3.0%.With the increase of cement dosage,the shrinkage strain of cement stabilized macadam and shrinkage coefficient decrease first and then increase,and the crack width of the base enlarges first and then lessens.When the cement dosage is 3.5%,the shrinkage strain and shrinkage coefficient is minimized,and the crack width is maximized.

Abstract: The electric power consumption of large-scale public buildings,which are the main objects in the supervision and transformation of building energy conservation,accounts for more than 30% of the total energy consumption of all the social architectures.However,at present the real-time separate energy consumption data of most public buildings has not been mastered.An acquisition system of buildings' energy consumption data was established by using data collection,communication and other related techniques and equipment.With this system,the separate monitoring of energy consumption was carried out in 40 target constructions and separate real-time data of energy consumption in these buildings were received.Factors which affect the energy consumption were identified by analyzing statistically the structure and using information of the buildings and the actual energy consumption data.Multiple linear regression analysis was used to analyze building energy consumption and influencing factors and 40 major factors which affect building energy consumption were obtained and the corresponding prediction model of energy consumption was developed.Compared with the observed data,the model can accurately forecast the energy consumption of the buildings which have the same functions.This model can provide reference data for the energy quota,price raising for above-quota of energy using and for energy saving for public constructions in the future.

Abstract: In order to study the mechanical properties of steel bone T-shaped concrete-filled steel tubular long columns under axial compression,an experimental analysis on 16 specimens with the slenderness ratio of 16λ43 under axial compression was carried out.The failure modes and work mechanism were studied,and curves of load-longitudinal displacement,load-strain and load-deflection of the specimen were obtained.By analyzing the effects of hoop index,bone index,slenderness ratio and other parameters on the mechanical property of the specimens under axial compression and comparing the experimental value of the specimen's ultimate bearing capacity with the theoretical value,the computational method of stability coefficient of the steel bone T-shaped concrete-filled steel tubular long columns under axial compression is proposed.The research results show that T-shaped concrete-filled steel tubular columns embedded with the "H" shaped steel bones have good ductility;steel tube,concrete and steel bone can work collaboratively,which improves the brittle failure properties of the core concrete and the bearing capacity of the composite column.The formula could be valuable for engineering design.

Abstract: In order to study the debonding of concrete filled steel tubes(CFST),pulling and bending methods were used to test the interfacial bond strength.Based on the test results,the debonding due to temperature change and shrinkage of core concrete in CFST was analyzed.The test and analysis results show that the bending method is a better way for bond strength test;that the concrete strength has little influence on bond strength while the surface condition of the steel has much influence on it,and the bond strength of the steel which is rust is greater than that of the steel with smooth surface.According to the bending test results,an interfacial bond strength of 0.86 MPa was obtained.Debonding will easily happen in CFST when temperature changes or core concrete shrinks.The bond strength test was firstly carried out,and the test methods and results can provide a reference for the research on the debonding of CFST arch,which will play a catalytic role in CFST arch bridge engineering applications.

Abstract: In order to achieve high efficiency and low cost in mining gentle dip thin ore-body,based on the study on the mining method of gentle dip thin ore-body and haul distances of scraper,the mathematical formulas of all the stope parameters were obtained by using mathematical method after analyzing theoretically the relationship of all the stope parameters in the false-inclined layout,which provided theoretical reference standards for determining stope parameters in the productive processAccording to 1-9# gentle dip thin ore-body of a domestic mine,quantitative study of the mine stope parameters optimization was carried out by using orthogonal experiment under the false-inclined layout theoryOptimal stope parameters layout method and the weight size of all factors influencing the stope index value(mining capacity and stope cost) were selectedThe best scheme was A2B2C1,iethe angle 45°,stope width 8 m and stope length 50 mThe results show that it could increase productivity of stope and reduce mining project cost,improve the qualitative decision of traditional stope parameters and provide scientific,accurate and quantitative theory basisFurthermore,this optimization scheme could be applied to the similar mines

Abstract: In order to study the influence of different loading process of self-weight on stress and displacement of the arch dam,the Xiluodu dam was taken as the research object.Seven different loading processes of self-weight of the dam were simulated to analyze the influence on the working state of the arch dam.The results of finite element analysis showed that the different loading process had a significant effect on the stress field and displacement field of the arch dam because of the arc shape of blocks and the accumulation of self-weight.With the increase of applied self-weight,the simulation results were getting more reasonable.The effect of the number of horizontal hierarchical level played a more important role than that of the vertical counterpart.Especially,the changes of principal tensile stress of the dam and displacement along cross-bed direction appeared more sensitive.The analysis results have some reference value for design and construction of arch dam.

Abstract: Airlines frequently encounter disruptions by severe weather conditions,air traffic control,equipment failures and so on,which may not only disarrange airline schedule but also infringe the interest of the passongers.In order to minimize the loss,the model and optimization algorithm of irregular flight recovery were researched in this article.Firstly,the model was constructed by considering the continuity and integrity of the passenger itineraries from passengers' perspective.The "time-band" algorithm which is based on network theory was used to solve the model so as to get the process of choosing and swapping flights.Finally,an example was presented to illustrate the practicability and validity of the model and the algorithm.

Abstract: In order to evaluate the effect of acid and alkali solutions on water and heavy metal contents of tail ore,experiments using the method of dynamic leaching of soil column with tail ore collected from Tongnai tailing dam in Fuxin,Liaoning of China,were performed.It was found that water content increased after leaching but metals of Cu,Cr,Mn,Cd and Ni respoused differently to the pH of the leaching solution in the range of pH 4 to pH 10.The contents of Cu and Cr decrease as the pH of the leaching solution increase from pH 4 to about pH 7,but increase when the solution pH is greater than 7;the contents of Mn and Ni increase as the solution pH increase but decrease slightly when the pH is greater than 8.5 and 8,respectively;Fe content decreases steadily as the solution pH increases,while the Cd content increases as the solution pH increases from 4 to 6.5,then decrease sharply when solution pH exceed this point.Since the leaching solution is acidic or alkalic,it is more meaningful than the pure water in describing the actual environment of tailings.

Abstract: A series of Bi2O3 photocatalysts doped with different amounts of titanium were prepared by the active carbon-assisted-sol method and then calcined at different temperatures.The prepared pure Bi2O3 and Ti-doped Bi2O3 samples were characterized by X-ray diffraction(XRD),nitrogen adsorption,scanning electron microscopy(SEM),and ultraviolet-visible diffuse reflectance spectroscopy(UV-Vis DRS).The characterization results revealed that all of the Ti-doped Bi2O3 samples exhibited stronger absorbance in ultraviolet light range than pure Bi2O3.The photocatalytic activity of the samples were evaluated by the photodegradation of methyl orange under UV light(λmax=365 nm) irradiation.The influences of Ti doping contents and calcination temperatures were also analyzed.The results show that at the optimal calcination temperature of 300 °C and 3%(molar ratio) of titanium doping the composite photocatalyst has much higher photocatalytic activity compared with pure Bi2O3.When the concentration of catalyst loading is 2 g/L,the degradation rate of methyl orange(20 mg/L) reached 96.4% under ultraviolet irradiation for 120 min.

Abstract: Industrial tanks are widely used in various petrochemical industries.Located in an industrial area in Nanning,Guangxi,the foundation ring walls of twelve newly built huge alcohol fermentation tanks were cracked massively when a trial operation began.There were many vertical cracks,together with a large angle warping between the steel tank and the ring wall,which had a negative impact on the production of the factory.In order to explore the cause of such accidents,the performance indicators,such as concrete strength,state of cracks,steel condition and its cover thickness,tank verticality,concrete surface defects and so on,were tested on site.The No.1 fermentation tank was analyzed as a typical example.Computer simulation and traditional theoretical approaches were applied to calculate the bearing capacity of different cases.It is concluded that the ring walls above the ground elevation faced lateral pressure induced by the internal sand may lead to the crack.Or it is most likely that the internal sand is not dense and when the water was injected into the steel tank,the tank was warped.This may result in the bottom steel slab to become deformed and to push the sand,leading to too much larger tensile stress in the ring walls to crack.

Abstract: The strength parameters of fissured ore-rock mass are mainly influenced by the mechanical parameters of rock block and the characteristic parameters of the joints.In order to estimate the strength parameters of fissured ore-rock mass in underground mining,the quantitative Geological Strength Index(GSI) rock mass classification system is used,and the effect of mining activities is considered.The GSI system is quantified by using joint spacing and Joint Roughness Coefficient(JRC).The fissured ore-rock mass from Zu-Cu deposit in Tongkeng mining area is taken as the research object,the joint spacing and Joint Roughness Coefficient are obtained from the geological survey of rock mass,and the strength parameters of the hanging wall and the footwall rock are estimated.The results show that the GSI method can determine the parameters of fissured ore-rock mass.The strength parameters of the hanging wall and footwall rocks are obtained as follows: the modulus of elasticity,5.749 GPa and 4.483 GPa,respectively;the cohesions,3.126 MPa and 2.772 MPa,respectively;the angle of internal friction,24.56° and 23.08°,respectively.These mechanical parameters can be regarded as basic parameters for mining design.

Abstract: In order to improve the real time character and network occupancy of data exchange in web application,the application of WebSocket technique in locomotive intelligent maintenance system was studied based on the comparison between traditional real time technology and WebSocket technology on Browser/Server(B/S) application about their communication performance.The multi-thread technology was used as an example to achieve reliable data transmission and the changing curve of locomotive state data was presented in a web browser.The feasibility of this method was proved by experimental results.

Abstract: In order to study the wave propagation over permeable seabed numerically,based on Boussinesq's equations for water waves,a resistance equation was introduced,and thus the equations were applicable to permeable seabedThe new equations were analyzed theoretically for constant water,and the phase velocity and damping rate were compared with the analytical solutionsIn non-staggered grids,a prediction-correction scheme was applied to the one-dimensional equationsA third order Adams-Bashforth scheme was adopted in prediction stage and a fourth order Adams-Moulton scheme was adopted in correction stageNumerical computation was carried out upon wave propagation over a submerged porous topography,and the computed results were compared with the experimental resultsThe agreement is relatively good,which shows that the present method is feasible to improve original Boussinesq's model for permeable seabeds

Abstract: In order to obtain the blended braking characteristics of super-big electric wheels of mining dump truck on different downhill slope,and analyze the power distribution between grid resistance electric dynamic brake and hydraulic wet multi-disc brake,the dynamic model of blended braking system was established by using a certain type of 520 tons gross vehicle weight dump truck as research object.Results show that with the initial velocity of 30 km/h,emergency braking distance is less than 21 m on different slopes below 10%;the average specific brake force nearly remain unchanged on different slope,and the maximum value is about 0.35;for rear specific brake force is bigger than that of front,the possibility of sideslip and deviation is bigger than that of out of steering control;the specific brake force difference between rear and front can be reduced by moving the center of gravity to the rear axle,while the average specific brake force remain unchanged,so the ground adhesion can used effectively;the brake power ratio between grid resistance and wet multi-disc brake is about 2∶ 3.These results shows that the blended braking system can reduce the brakes load effectively,increase braking performance,and extend the service life of the main brakes.

Abstract: In order to improve the reliability of filling pipe network,the transportation characteristics of filling slurry with different formulation and concentration should be obtainedCombined with the reality of industrial production,the L-shaped pipe gravity transportation method was adopted to design the experimentThe rheological parameters of filling slurry with different concentration and proportion were tested in the experiment,and the variation of rheological property indicators of slurry and filling times line with different proportion and concentration were analyzedThe results are: ① under the comparable condition,the filling slurry has higher cohesion as concentration or proportion increases;② after dilution,relative indices decrease drastically due to high shear stress in filling slurry;③ the filling times line of realizable gravity transportation will increase drastically when the concentration of slurry is very lowTherefore,this research can be a beneficial reference for the optimized layout of the pipe network in filling technology

Abstract: Wireless sensor networks(WSN) are widely used in the areas of modern agriculture and aquacultureNowadays based on the WSN of cow's behavioral features monitoring,a virtual backbone network is constructed for the communication of multi-hop nodesA connected dominating set(CDS) is applied to construct the virtual backbone networkIn this article,a distributed algorithm for minimum connected dominating set is proposed based on maximal independent set,and is proved to be correctThe simulation results show that the algorithm is simple,effective and suitable for the wireless network with topology change as node movingIt is also shown that the size of CDS is small to 30% of all nodesSo the algorithm can reduce the retransmission redundancy nodes and save network resources efficiently

Abstract: In order to solve the problem of multicriteria decision-making,a new method based on vague sets theory is proposed.Firstly,three aspects including true-membership,false-membership,and the uncertainty in the vague are set corresponding to the point of the triangular rectangular coordinates system.In the corresponding coordinate system,the distance between the points of strategy expressed by vague sets and the optimum point is used to determine the quality of the candidate strategy.Secondly,the proposed method is proved to be the only way in ranking the two strategies expressed by vague sets.Finally,the effectiveness and feasibility of the method are demonstrated by example.

Abstract: In order to determine the occurrence of groundwater around the mine and solve the problem of mine water inrush,Niaoshan coal mine air shaft is used as an example to survey the groundwater around the shaft by applying the induced polarization method.By combining engineering geological data,the survey results are interpreted to obtain the depth and thickness of the aquifer and water inflow.Compared with the actual results,the induced polarization method is quite reliable in the mine groundwater exploration because it is not affected by pure undulating terrain and surrounding rock resistivity heterogeneity.By using the exploration results to guide shaft construction,it not only provides security for mine construction,but also accelerates well completion.The induced polarization method can also be used to check the effect of the shaft where the grouting is completed and assess the quality of the grouting.Therefore this method has the potential of application in broader area.

Abstract: In order to improve coal loading performance,increasing the lump rate of a drum shearer and enhancing its coal production economic benefits,parameters of the outer edge diameter of the blade,inside and outside spiral rising angles,drum rotating speeds and dragging velocity were used as design variables,the largest coal loading productivity and coal price highest were chosen as optimal objective and various geometric constraint and performance constraint were set for optimization design of a screw drum of a shear.Particle swarm optimization algorithm and ant colony algorithm hybrid optimization(PSO-GACA algorithm) were used to solve this optimization design.The optimized results indicate that the productivity of loading coal can be increase by 14.5%,the lump coal rate increases by 13.2%,coal price can be enhanced by 0.75% when the screw drum is not jammed and the casting distance of lump coal is reasonable.

Abstract: Aiming at short circuit aroused by galloping of iced bundled conductors,an analysis method of amplitude of galloping of iced bundled conductors is proposed from the relation between work and energy.The expression of amplitude increment of galloping of iced bundled conductors through a cycle is educed under the sine mode hypothesis.The expression of amplitude increment explains the action of linear item and nonlinear item in aerodynamic forces on iced bundled conductors during dissimilarity phases.The conclusion is that the work of nonlinear item in aerodynamic forces is smaller and the amplitude of galloping of iced bundled conductors increases more slowly,when the amplitude of galloping of iced bundled conductors is smaller;the work of nonlinear item in aerodynamic forces is prime part of the work aerodynamic forces and the amplitude of galloping of iced bundled conductors increases faster,when the amplitude of galloping of iced bundled conductors is larger.Therefore,the nonlinear item in aerodynamic forces must be considered in analysis of short circuit aroused by galloping of iced bundled conductors.

Abstract: In order to study the strong column and weak beam effect of the column ends reinforced with carbon fiber reinforced polymer(CFRP),a numerical quasi-static model was established with ANSYS software for a three-storey reinforced concrete frame structure.The results for traditional joints specified in the design code and for the joints retrofitted with CFRP were compared.It was found that the stress in the reinforce bars for slab close to the beam increases significantly with the applied top displacement of the structure in horizontal direction,but increases slightly for slab far from the beam.For the joints retrofitted with CFRP,the yielding of column reinforce bars will be delayed,while the number of cracks on beams increases,which tend to exhibit a failure type closer to the beam-pivot or ductile mode.

Abstract: In order to obtain more accurate forecasting results of runoff,using the dmey wavelet transform,the runoff time sequence is decomposed into high frequency part and low frequency part,then using the back propagation neural network based on the genetic algorithm(GANN),both of the two subparts are predicted respectively,finally,using the inverse dmey wavelet transform,both of the two predicted results are reconstructed to form the future behavior of the runoff series.The method has been compared with three individual forecasting models,such as GANN,back propagation neural network(BPNN) and simple moving average(SMA).It is demonstrated that the presented method is superior to the other models presented in this research in terms of the same evaluation measurements.Therefore the nonlinear ensemble model proposed in this paper can reflect the runoff time series trend well,and have good forecasting stability and accuracy,and can be used as an alternative forecasting tool for rain-runoff.

Abstract: In order to study the strengthening of in-service bridges,an finite element analysis model was established in ANSYS.SRAP(A kind of high strength steel wire and alumina chitosan resin mortar),carbon fiber reinforced polymer and bonding steel plates were used to separately strengthen the hollow slab beams of a bridge,and reinforcement requirements are met in all three cases.Through the finite element analysis,it can be concluded that the SRAP is the best choice to improve the bearing capacity of reinforced concrete and the stiffness and strength performance of the slab beams.SRAP technology provides an important reference and basis for practical engineering.