Abstract:An analysis was made of the correlative limitation of traditional stiffness method.Based on the finite element flexibility method theory,a new calculation method for the equivalent nodal load of the damaged beam element was proposed by introducing the sectional secant-flexibility,which was compatible with conventional nonlinear structural-analysis because an iteration was not required.A static and nonlinear overall-analysis was also made for a renforced concrete frame structure with a self-development software.A case study shows that by taking the structural damage into consideration,nonlinear structural-analysis improves in terms of its efficiency,convergence and stability with the equivalent nodal load method.

Abstract:Based on test analysis of four prestressed steel-concrete beams,allowing for the nonlinearity of geometry and material,the lateral distortional buckling and the plate local buckling a fine and exact finite element stimulation model by ABAQUS is established to study the the nonlinear development of beams,which reflects the overall behavior of the beam and catches the local effect,such as the stress varying in prestressed tendons,the slip,the redistribution of internal forces,the overall instability and local buckling.Compared the results by the FE model with the tests carefully and strictly,the FE model is of excellent numerical function with enough accuracy and versatility,which provides a powerful numeral tool for the research of continuous steel-concrete beams prestressed with external tendons.

Abstract:The dynamic instability of light-weight steel structures with portal frames under coupled wind and snow loads is studied by numerical simulation and wind tunnel tests.Coupled action between wind and snow is simulated by computational fluid dynamics(CFD)method and the unsteady aerodynamic forces on the structure are obtained by wind tunnel test.Then,the structure is studied as a spatial portal frame on its dynamic instability by the Budiansky-Roth criterion.The results show that simulated snow-drifting on the roof is consistent with the movement rule of airflow near the roof.Non-uniform snow distribution can decrease the dynamic stability of the structure simultaneously under wind actions.

Abstract:A ten-story frame structure is designed for shaking table model test and the influence of different input mechanisms on the seismic responses of the structure are discussed. Based on the free-field tests and soil-structure interaction tests, three waves are selected and used as shaking table model test inputs. They are records used in the former tests, the soil’s surface records obtained from the free-field tests and the foundation response of soil-structure interaction tests respectively.A comparative study is made of the results with those obtained from soil-structure interaction system and a discussion is held on the reasonableness of the different input mechanisms. The test results show that if the bedrock wave is used as input without considering the soil factor,the maximum error may occur;when free field waves are used as input, the error may reduce; if the time history record at the foundation in the soil-structure system test is used as input, the structure response will be much colser to the soil-structure interaction system, but sometimes the structural response may be underestimated.

Abstract:Totally 60 specimens of panel-to-stud nail connections were designed and manufactured.Tests of the specimens both under monotonic loading and cyclic loading were conducted.Except for a few specimens that failed due to rupture of the structural panel,most nail connections failed following yield mode M-c1,which was consistent with Eurocode 5-Design of timber structures.The angle between the panel orientation and the grain of dimension lumber affects the performance of nail connections to some extent,while with the increasing of the conditioning time,the effect decreases and eventually become negligible.The load-carrying capacity and stiffness of nail connections decrease with the conditioning time.The load-carrying capacity of the nail connections increases slightly under cyclic loading,whilst the stiffness decreases,and both of them tend to be stable after a number of cycles of loading.A formula to evaluate the stiffness of the nail connections considering the stiffness degeneration is obtained from statistics of the experimental results.

Abstract:Based on the bid-section of Binhai mass transit from Tianjin Station to Qijing Road Station,3D-FEM is put forward to simulate shield tunneling long distance under multi-tracks of railway.According to the simulation results,settlement of ground surface along and perpendicular to the shield tunnel are analyzed in detail,the discipline of ground surface settlement in different driving stages is uncovered; the disturbance area of ground and the settlement ratio dedicated by first tunnel and second tunnel are studied,the function of railway load in causing ground displacement is also discussed.The results fit well with monitoring data and can be used as a reference for similar projects.

Abstract:Considering the complexity of traffic on urban road, the network topology was formulated.In order to make better use of the multisource data, the absorbing Markov process theory was employed to network.Then the model which connected the parameters, such as traffic counts, traffic producing and absorbing, was formulated.A simulation system was established to illustrate the model.In this system, the multisource data, such as traffic counts and steering ratio, were collected by the detectors.After data processing, the Markov transition probability matrix is obtained, which can be imported into the MATLAB as sparse matrix.The outputs of the model show that the traffic volumes can be calculated accurately.

Abstract:polynomial distributed lags (PDL) model is proposed for short-term traffic forecasting,the key idea of which is that the time series of traffic condition are affected not only by the own lagged terms,but also by other factors relevant to the traffic condition.The PDL model also assumes that the effects of other factors are distributed to a number of terms.Comparison with the autoregressive integrated moving average (ARIMA) model shows that with the same prediction accuracy as the ARIMA model,the PDL model is more portable and easier but less complicated to implement.This research result provides a new research idea for the short-term traffic flow forecasting theory.

Abstract:A satisfaction index of commute travel was produced in order to evaluate the extent to which the commuters were satisfied with transportation system.Based on inductive learning, an analysis of the survey data was made to identify the relationship between commuters’satisfaction and commute time.The final satisfaction index was conducted with travel time intervals of weight of evidence above 0.5 as indicator.Commute time between 10 and 30 minutes is the indicator of most satisfactory commute time, which proves to some extent that travel has both values of “accessibility” and “mobility”.

Abstract:According to the driving environment characteristic of the expressway tunnels,the concept of spatial visual pattern was proposed to analyze the driving behavior in tunnel section for the first time.On the basis of the definition and the assumed conditions,the influencing factors of spatial visual pattern were analyzed,and the critical conditions of tunnel spatial visual pattern were calculated from three aspects including horizontal curve,vertical curve and visual characteristic of the drivers.Based on the measured data,the driving behavior in tunnel section was different for different spatial visual patterns,the driving behavior process of the spatial visual pattern could be divided into two sections and the un-spatial visual pattern could be divided into three sections,and the operating speed process of the typical spatial visual patterns was validated.

Abstract:Based on user equilibrium theory,a study was made of the interaction between the traffic flow of cars and buses in super-network,the traffic flows of the two transportation modes were optimized to maximize the bus-sharing ratio.Then,based on the assumption that the total travel cost in urban transportation network consisting of the travel cost of cars and the buses,two-tier location model was established to optimize the total travel cost and land cost.Finally,a case study was made of the two-tier location model and then gives some useful suggestions on optimization location of transportation terminal.

Abstract:To reduce the preparation costs of coating Ti anode for generating electrolyzed oxidizing water (EOW),and improve its electrolysis efficiency and service life,RuO2SnO2TiO2 were used as metal oxide coating to analyze the effect of Ru on the performance of coating Ti anode.The effects of sintering temperature,heat treatment time on the properties of coating Ti anode were investigated.Results indicate that Ru processes electrocatalytic activity,and plays a vital part in the geometrical coating configuration,reinforcement of catalytic activity in chlorine dissociation reaction and the anode longevity.When Ru scales below 30%,there is no sigh of element ruthenium or anatase titanium dioxide,and the geometrical coating configuration is a perfect retile structure; When it is 25%,duration of anode is the longest.If taking the performance and cost of coating Ti anode into consideration,the most suitable mol percentage of Ru was 25%.Suitable sintering temperature was the key process means.The crystal grain growed incompletely in too low temperature,while the coating crack increased and the crystal grain growed too big in too high temperature.

Abstract:Laccase was immobilized on MNH2SiO2 with glutaraldehyde as crosslinking agent.The effects on the activity of immobilized laccase,such as concentration of 2,4DCP (2,4dichlorophenols),acidity of solution,temperature were studied.The results show when concentration of 2,4DCP is 5 mg·L-1,pH of solution is 5.5,and the temperature is at 30℃,the highest removal rate of 2,4DCP is 42.28%.The results show that the optimal pH for immobilized laccase is higher than the best pH for free enzyme.Compared with the free enzyme,its stability and repetition are considerably improved.

Abstract:Power transfer characteristics of the torque converter in the locking are analyzed,and the dynamic model of torque converter is built up.Based on a comprehensive consideration of the output torque characteristic of engine,three-parameter dynamic lockup control rule is designed to promote automotive power performance.Optimization model of clutch oil pressure is also established,and based on ant colony algorithm,the variation of lockup clutch oil pressure is obtained.With the Matlab/Simulink/ Stateflow software,the lockup strategy is verified.A conclusion is drawn that the dynamic lockup control rule promotes vehicle power performance without impact or power interrupt in the locking.

Abstract:A relationship between complex network parameters and wireless sensor networks(WSN) capacity is obtained through theoretical derivation.Under the guidance of the relationship,a topology control is employed in removing some superfluous links and adding some shortcut,to increase the network capacity.According to the small-world effect which the WSN possesses after the topology control,a local area control of virus spreading is proposed in the light of the virus spreading intensity of nodes.The research suggests that by topology control,the WSN network capacity is effectively improved; by immunizing a small amount of essential nodes,the immune cost is saved,and the ability of anti-virus attack is enhanced.

Abstract:Ontology is applied to the study of product’s characteristic model.With the ontology theory and the manufacturing face adjacency graph from the components as foundation,the partial characteristic can be recognized in turn—it forms the manufacture behaviors static model.Based on the undirected graph and its Boolean calculation,the integrated manufacture behavior sequence forms by the clamp direction of characteristic,whose sequence can be analyzed in following steps.

Abstract:Based on the analysis of typical polarized target decomposition and classification,the paper proposes a new scheme for iterative classification of polarimetric SAR image,which blends the outcomes of Yamaguchi decomposition and H/α decomposition.This technique extracts four decomposition coefficients of four scattering mechanism components through Yamaguchi decomposition,the scattering entropy and angle through H/α decomposition first; then the initial classification of the POLSAR images is done by the combination of the 6 parameters mentioned above.The final result is obtained by iterative classification due to coherence scattering matrix following wishart distribution.The classification performance improved,better effectiveness and less amount of computation is demonstrated by the experimental results of polarimetric SAR data.

Abstract:The iterating eigenvalue least-squares is not robust,so an improved statistic analysis method is introduced for fitting a plane to point clouds containing a great amount of outliers.The method is robust iterating least-squares (RILS).Firstly,some plane models are fitted to the local neighborhoods around sample points by moving least-squares (MLS),and then a good model is selected from those models by least median of squares (LMS)and refined to appropriate the whole point set through eliminating those outliers by iterating eigenvalue least-squares.Different from other backward ways,this method is robust,which retains the accuracy of the original method,and furthermore accelerates the convergence of iteration.

Abstract:The formula by which the real-time clocks are estimated is deduced, and the model of precise point positioning is discussed based on the pseudorange observation of regional reference network.The pseudorange observation from Shanghai reference network is used to estimate clocks using the presented method.Using the estimated clocks, the data from Tongji University Station is processed in real-time point positioning mode.The real-time kinematic results indicate that the root mean square (RMS) of three directions such as the North,the East and the Up are 0.444 2, 0.522 7, 1.110 9 m,respectively.

Abstract:The black muddy rock samples were selected from the deep lake facies of the Shahejie formation,tertiary,in Jiyang depression.By floating with different densities ZnBr2 heavy solution,the samples were divided into many density fractions.A series of detections,including transmission light,florescence,XRD and so on,revealed the difference of organic matter preservation in the different fractions.The analysis results indicate in the fraction ①(ρ <1.6 g·cm-3),the free organic particles are dominant and the minerals do not combine with the organic particles closely.In the fractions of ② and ③(1.6 g·cm-3<ρ <2.2 g·cm-3,ρ >2.2 g·cm-3),the organic amorphous distributes in the fine mineral phase and shows orange and light yellow fluorescence.It indicates the organic matter combines with mineral closely.Further analysis on the organic matter distribution indicates that the fraction ① combines with less than 1% organic matter in the source rock; the fraction ② and ③ combine more than 90% organic matter of the source rock.It reflects the organic matter combining with the mineral is very important way of the organic matter preservation.

Abstract:This paper deals with the research on Yanjia region glutenite body of the upper Es4 in the northern steep slope zone of Dongying Depression.Effective reservoir samples are taken by core drilling,formation testing and gas logging data,and observing the relationship among the core,thin section and image logging,it is found that the effective reservoir appears as well sorted pebbly sandstone and conglomeratic sandstone in macroscale and microscale.The simulating of digital core also indicates that the difference of pore configuration which is derived from different rock textures is the major impact factor for electric resistivity response,so various rock textures should be well considered when identify the validity of reservoir using well logging.Therefore,during the data processing,detailed identification of rock textures by image model of image logging,based on automatic layering of conventional logging curve and automatic identification of lithologic category by means of logging facies cluster method,is indispensable.With the newly double constrains of rock texture and lower limit of electrical property on effective reservoir,this semi-quantitative method is preliminarily proposed to be a preferable application for multi-information identification of effective reservoir.

Abstract:A class of global optimization problem with polynomial is investigated with canonical duality theory.The unconstrained polynomial optimization problem is transformed into box constrained global optimization.The canonical dual function is defied for a solution to the original global optimization with polynomial problem by solving the dual problem.In addition,the dual problem proves to be a concave optimization.Finally,an example about binary six-order polynomial global optimization is illustrated.

Abstract:The solution of least absolute deviation (LAD),a pending problem for more than 200 years in mathematics,is not easy to calculate because of the absolute value function. Based on a great deal of computing and long-term study of various mathematical models under LAD criteria,a conclusion is drawn that if there is a LAD parameter a=a*∈Rn,and making the following LAD criterion tenable ∑mi=1|yi-f(xi,a*)|=min,then the fitting function f(x,a*) can be characterized that there are at least n points x1,x2,…,xn,making yi-f(xi,a*)=0,i=1,2,…,n(n≤m) valid,the problem of LAD solution can be achieved.

Abstract:The sound insulation of double panels with a certain plane dimensions and boundary condition can be analyzed by a combinative way of impedance analysis method and a few measurements,and an expert formula can be obtained.Three kinds of sandwich material constructions were analyzed respectively.Its sound insulations and expert formulae were obtained in octave band.These three kinds of sandwich materials are absorbing sandwich,air sandwich,and air-absorbing sandwich.It will be convenient and high efficient to screen insulation construction parameters by these expert formulae in engineering design.

Abstract:At the maturity of short-term bond,the payment of the short-term debt may cause a jump in the company’s assets,so the pricing of the long-term bond needs to be divided into periods.By stochastic analysis and structure approach,the probability of no default before the short-term bond maturity and the conditional distribution of the company’s assets was obtained,and the pricing formula for both the short- and long-term bond were derived too.Finally,an analysis was made of the financial meanings on the basis of the numerical results.

Abstract:On the basis of equal cooperation between project-based enterprises,the fairness preference theory was applied to constructing project-based supply chain cross-organizational bidirectional incentives model from the view of maximizing project value-adding,thus an analysis was made of the influence of project-based enterprises’ effects level,fairness preference degree and project value-adding allocation coefficient on project-based supply chain project value-adding,and then the related digital simulation and example analysis were presented for the purpose of proofing the model theoretical analysis conclusions.The results reflect that,while under the condition that project-based enterprises have fairness preference,the project-based supply chain implemented cross-organizational bidirectional incentives strategy not only can achieve project value-adding maximization,which prompts project-based enterprises allocating resources and efforts level reasonably,but as well realize project-based supply chain benefits improvement and payment cost reduction between the cooperative partners.

Abstract:A model of a single two-staged global supply chain is set up.The necessary production scale,costs,profits and other indicators are calculated for the global supply chain enterprises to migrate to port cluster based on NetLogo simulation platform.Repeated experiments indicates that the port as an important node in the global supply chain will attract supply chain enterprises to agglomerate to port cluster.And the main factors are analyzed by further tests under the premise that the other variables remain unchanged.Since enterprises in a global supply chain are dynamic,the economic issues for foreign suppliers to enter the global supply chain in the port cluster are discussed by game theory based on Cournot and Stackelberg model.

Abstract:Based on three indicators of rework cost,change cost and cost growth,data from 181 projects were analyzed through T test and analysis of variance.The results show that considering project delivery method,DB method has a significantly lower cost growth in comparison to DBB method,with a lower rework cost and change cost also,though not significant.In respect of Payment method,cost growth is the lowest in lump sum contract through negotiation with a mean value of -1.97%,and the highest in unit price contract with a mean value of 10.70%.Taking these two aspects into consideration together,projects with DB method and lump sum contract through negotiation have the lowest cost growth,accompanied with the highest change cost,which should draw project participants’ attention.