Abstract:

Abstract: Based on the experimental results ot 1 7 steeI fiber reinforced concrete corbels，the numericaI simu。lation with nonlinear finite element method was adopted to analyze the behavior and to explore the influence ofsteel fiber volume ratio，the shear span ratio and the strength of concrete on cracking—resistance behavior ofsteel fiber reinforced concrete corbels．The result shows that the cracking—resistance behavior increases about1 0 percent with the increase of the volume ratio of steel fibers，and the cracking—resistance behavior increaseslinearly with concrete strength，but the cracking—resistance behavior decreases markedly with the increase ofshear span ratio．By contrasting the numer／cal simulation analysis results with the expe6ments，it proves therationality of the unit type，material stress—strain relations and failure criteria used in the finite element analy—sis model．Therefore，it provides a reference for practical usage．

Abstract: his paper establishes two new damage models，one aeeouflt for the maximum deformation effectonly while tile other account fbr both the maximum deformation and the cumulative damage，and establish thecorresponding evaluation indicators for different structural damage state．By comparing the result of proposedstate assessment indicators and other indicators raider different seismic peak acceleration and tile same seismicwaves with different duration，study the application of two kinds of’damage model．The result indicates that，while peak acceleration is less than 0．3 g，using the displacement model to measure tile structural damagestate is reasonable；when larger than 0．3 g，it should be intcgrated to consider the cumulative elect of themaximum displacement and damage of the damage model，Examples show that the proposed damage assess．ment indicators fit the actual situation better，with engineering application value to some extent．

Abstract: his paper presents the results of transmission length tests on 28 pre—tensioned members made ofprestressing reinforcement with helical rib(PC steel bars)．The compressive strain and stress of concrete with—in the prestressing transm ission zone for the PC steel bars of the members are analyzed，and the factors affect—ing the transmission length of PC steel bars in concrete are also discussed，and a formula for calculating thetransmission length is suggested．The result can provide reference for the application of PC steel bars in con—crete strueture．

Abstract: In this paper，the axial compressive strain—stress cHrve of plastic concrete is tested．On the basis ofthe experimental results，and comparison study of the calculating method of the elastic modulus of plain COIl—crete，It is put off that the slope from 0．3 times peak stress to 0．6 times peak stress is more stable in the upward section of axial compressive strain—stress curve of plastic concrete．Therefor，befitting calculating methodof the elastic modulus of plastic concrete has been gained．

Abstract: 1 8 members of slender high column made of Yellow River cellular brick are made based on orthogonal experiment．By the means of compressive test，the limit bearing power and strain data of each member areobtained．Through measurement，the influence of mortar strength，eccentricity and ratio of width—thicknessis studied．The result indicates that the major factors of the deformation of eccentric compressive members areeccentricity and ratio of width——thickness and the section deformation of these members can meet the assump。tion of plane section．According to the rule of interior and exterior force equilibrium，section deformation ofeccentric compressive members is verified．It shows that the regularity is reliable．

Abstract: In view of the at characteristic that the cable shape is very sensitive on the temperature in theprocess of main cable erection．Influence of the temperature changes on main cable section and bridge tower tothe cable shape was researched．According to invariable temperature models of the cable，correction methods oftemperature changes leading to sagging variation under the unloaded cable condition were proposed based onlength of non—stress wire strand is equal，and computational method about temperature changes of bridge towersection to give rise to cable sag variable values was given．Sagging values with methods of iteration are in agreement with the results of finite element program SBCC in different temperature conditions，and the maximum deviation value is 9 mm and is about 3％．It shows that the correction methods on temperature changesleading to sagging variation are feasible to adjust suspended cable shape．

Abstract: Based on the result of shaking table test and Pushover analysis of SRC frame，the problem thatstrong column—weak beam failure mechanism is difficult to realize in practical composite flame is studied fromtwo aspects：the regulations incoordination on strong column—weak beam between reinforced concrete flameand steel frame and the seismic properties difference between steel beam and SRC column，basic defect anddeficiency of norm provision on internal force adjustment is demonstrated．Suggestions about internal force ad—justment coefficient for strong column-weak beam realization of composite flame and the imulation of SRCmembers are proposed．

Abstract: Based on the result of shaking table test and Pushover analysis of SRC frame，the problem thatstrong column—weak beam failure mechanism is difficult to realize in practical composite flame is studied fromtwo aspects：the regulations incoordination on strong column—weak beam between reinforced concrete flameand steel frame and the seismic properties difference between steel beam and SRC column，basic defect anddeficiency of norm provision on internal force adjustment is demonstrated．Suggestions about internal force ad—justment coefficient for strong column-weak beam realization of composite flame and the imulation of SRCmembers are proposed．

Abstract: Row piles retaining structure will affect the settlement distribution of composite foundation for high—rise buildings．Based on this，by using finite element numerical simulation tools，a simple 3一D FEM model of the composite foundation considering the effects of row piles retaining structure is established．By usingdifferential settlement as control indicator and the change of the foundation deformation modulus to express thechanges of bearing stiffness，as well as considering the existence of row piles retaining structure，the distribu—tive regularity of settlement curve is discussed when we use the design method for composite foundation consid—ering of the space—varying rigidity．Research shows that the settlement distribution is obviously affected by rowpiles retaining structure．Hence based on the control of differential settlement，when we use the design methodfor foundation considering of the space—varying rigidity，we should consider the effect of row piles retainingstructure．Research results possess a certain theoretical guidance on reducing the side-piles that locate themarginal part of raft，reducing differential settlement，and ameliorating hypo—stress of the raft and superstructure．

Abstract: Three dimensional model of space crossing structure by which working shaft is connected with tun—nel shield and open cut tunnel is established．Longitudinal seismic response analysis of the complicated struc—ture is made by FLAC3 D．Displacement and stress response rule of key point in the joint between workingshaft and tunnel is gained．Convergence displacement of joint between working shaft and tunnel，principalstress of key point is analyzed in the process of longitudinal seismic excitation，then longitudinal antiseismiccharacteristic of the structure iS evaluated．

Abstract: The 3一axle vehicle model was established for the study of vehicle dynamic load that the trucks acton the road．Based 0n the road roughness，the change law of vehicle dynamic load and dynamic load coeffi—cient，which are effected by road level、vehicle velocity、weight and suspension parameters，were studied．Itwas found that when the road level is degraded or the vehicle speed is higher，the dynamic load and the dy—namic load coefficient of each wheel are to increase．The reduction of the balanced suspension damping or theincrease of the balanced suspension stiffness would cause the dynamic load of the middle and the rear wheels toincrease．When the weight is added，the total 10ad acting on the road is raised．

Abstract: Aspen Plus has been used to simulate the ammonia synthesis process for producing ammonia by using the reasonable unit operation model and the RKS—BM thermodynamic model．The simulation resuhs obtained showed good agreement with the actual plant data．The simulated date has certain guiding significance．In addition，the efficiency of change in operating conditions on the synthetic process was discussed through aspects of synthetic pressure，converter outlet temperature，recycle ratio，fresh gas hydrogen—nitrogen ratio，recycle compressor adiabatic efficiency etc．The operating conditions were optimized with net income as objeetive function：synthetic pressure 20 M Pa，converter outlet temperature 3 1 3℃，recycle ratio 3．35，flesh gas hydrogen—nitrogen ratio 3．0，recycle compressor adiabatic efficiency 0．8．

Abstract: The content of proanthocyandins from the flowers of Hibiscus syriaeus Linn was regarded as the index of examination．This paper studied the concentration of ethanol，temperature，solid—liquid ratio and timeof extraction as factors influencing the extraction．According to orthogonal test，the optimal extraction conditions of proanthocyandin8 were showed as follows：the concentration of ethanol was 90％，the temperature ofextraction was 70℃．the time of extraction was 30 minutes and the solid—liquid ratio was 1：9．

Abstract: Chloromethylated polystyrene divinylbenzene grafted quaternary ammonium salt of phosphor—tungsticheteropoly acid had been prepared as acatalyst．The catalyst had been characterized by IR spectrum and inductively coupled plasma atomic emission spectrometry． 3，4-Epoxycyclohexylmethyl一3’，4’一EpoxycyclohexaneCarboxylate(A00)had been synthesized by epoxidation of 3一Cyelohexenylmethyl 3 7-Cyclohexeneearboxylate(A)with hydrogen peroxide(W(H202)=34．5％)as oxidant under organic solvent—free condition．The maininfluence factors in the reaction，such as mole ration of A to H2 02，reaction time，temperature，amounts ofcatalyst and SO on，had been studied．The appropriate reaction condition are as fallows(based on 60 mmolA)：reaction temperature 65℃，reaction time 100 minutes，catalyst 5．0 g，n(A)：n(H202)=1：3．Underthe condition．average conversion of A is more than 99％and average yield of AOO is 78．9％．The averagerecovery of catalyst is over 93％．

Abstract: using ethanol—aqueous solution to extract soybean isoflarone from the waste residue of the soybean．After preliminary purification，high—purity genistein was obtained with AB一8 macroporous resin by gradientelution．Samples were determined method and compared with the TLC．UV and HPLC．The results showedthat：The TLC method is simple and the separation is effective；the UV method was high accuracy，high preci—sion and good reproducibility．The relative average deviation for the recovery test was 1．04％，the relative average deviation for the tests of precision was 0．24％and the relative average deviation for the repeatability testwas 0．09％；the HPLC method was high resolution，high sensitivity，etc．The sample purity was 90．1％．

Abstract: A new type high desahing nanofiltration membrane was fabricated by use of interfacial polymerization techniques onto aporous support polyether sulfone(PES)uhrafihration membrane．The separation factorof membrane for NaCI and xylenol orange(XO)in the XO／NaCl／water system was used as the object of studyand the uniform design was applied to the preparation process．The experimental data were treated by SPSSsoftware，and the regression equation was established．And the calculation results of the regression equation a—gree well with the experimental data．The separation factor can reach 1 6 at the optimal condition which wasobtained by calculation with the regression equation and further experiment as follows：polyamine flocculants0．68％(wt)；2，5一diaminobenzene sulfonic0．4％(wt)in inorganic phase；trimesoyl chloride 0．4％(wt)inorganic phase；interfacial polymerization(IP)time 2．5 min．Then，the separation factors were investigated forXO with the four salts．The results show that the optimized composite membrane has the good effect for separating XO with salts．

Abstract: Convection heat transfer of CO，at supercritical pressures in horizontal circular tube is studied numerically．The effect of heat flux，temperature of the wall，mass flux，and pressure on the heat transfer coeffi—cient is investigated．The simulated data indicates that heat flux and temperature of the wall affect slightly theconvection heat transfer of supercritical C02，and mass flux and pressure affect it significantly．With the in—crease of mass flux，heat transfer coefficient is improved distinctly．The operation pressure is closer to the critical pressure，the change of heat transfer coefficient near critical line is clearer，and the peak value is higher．

Abstract: Static experiments for adsorption behavior of norfloxacin in soils were carried out to investigate the influ—ence of temperature and pH on adsorption．The results indicated that the adsorption isotherms of norfloxacin inthree kinds of soils were well described by the Freundlich type．Adsorption constant of organic mater of norfloxacinaveraged 14．475．and the free energies of norfloxacin adsorption were一7．549～一5．284 kJ·mol一1 at 303．15 K．

Abstract: The spectrographic oil analysis of gear fatigue wear test showed it was not obvious that the wear rulewas reflected through using Fe and Cr mass fraction，but it was c]ear as using Cu mass fraction．At the sametime，analysis showed element mass fraction gradient could represent more the wear rule of the testing gear，andgear wear entered normal wear stage after 50 h．On this basis，Cr mass fraction has been separated thelinear trend item and the residual sequence item，which was used to establish the AR time—series combinationmodel．And forecasting analysis was carried out．Satisfactory result was achieved after the spectrum experimentdata examination．This study provides apowerful and efficient method for friction and wear analysis，state an—nitoring and fault forecasting of machine equipment．

Abstract: Cementitious materials were prepared by using a large amount of blast furnace slag and a small amount of metakaolin as raw materials，as well as the mixture of NaOH and Na2 Si03 as alkali activator．Effectsof average particle size of raw material，content of activator，curing time and temperature on the properties ofcementitious materials were studied．When the content of the activator was 1 2％，the compressive strength was1 7．66 MPa for the sample prepared from raw material granularity of 1 0 Ixm and cured at room temperature．However，it reached 27．9 1 MPa when the amount of activator increased to 1 6％．The resuhs also showed thatthe compressive strength increased with the extending of the curing time．The curing temperature at 80 oC wasmore suitable for the improvement of the early strength than other temperatures but the temperature shouldnotbe too high．

Abstract: In the gas—assisted injection molding，foaming structure in the gas channel region is a key factoraffecting the mechanical and optical performance of the GAIM part．An experiment was carried out to study theeffects of the processing conditions on foam formation in the gas—assisted injection molding，using quantitativeanalysis method．The relationship between the processing parameters and foam formation on the gas channelwall was discussed and the reasons leading to foam was analyzed．The results reveal that foam can be avoidedby lowering the melt temperature，reducing the gas injection pressure and the holding pressure as well as theholding time．

Abstract: The deformation and fracture behavior under bending of bulk metallic glass Zr65 Cul5 Nilo A1lo wasstudied using three—point bending machine and scanning electron microscopy(SEM)at room temperature．The results indicate that the samples experience elastic and plastic deformation process before fracture，and noobvious serrated rheological change and work hardening is found during plastic deformation．The biggest deflection value of specimens reaches 4．1 1 mm，which exhibits better plasticity．Shear bands do not propagate a—long the direction of theoretical maximum stress because of complex stress state．The fracture surface is typicalvein—pattern in compressive stress regions，which is the same as fracture surface in compressive test．Corn—plex reticular patterns are observed under different stress states in tension regions，and micro—scale voids andcracks exit along the shear bands，showing that the formation of shear bands is associated with free volume．

Abstract: Ultrasonic treatment on pure aluminum solidification process was studied．The cooling temperaturecurves and cavitation and acoustic stream refined by ultrasonic was discussed．Experimental results showedthat solidification structures of casting ingot treated by ultrasonic are refined significantly．The solidificationprocess time becomes shorter and temperature gradient field smaller，Average grain size was 90～500“m，With the increasing of ultrasonic power，more refined structure call be obtained．However，when the ultrasonicpower reaches a certain value and different positions of the the casting ingot，the effect of refining grains doesnot increase significantly．Cavitation effect can effectively function and solidification structure can be refinedbetter aided by agitating effect of acoustic stream．

Abstract: Aim to the hard asphalt mixture，70#asphalt mixture，SBS modified asphalt mixture were heat—stable(for the 0．7 MPa under 50℃、60℃、70℃three temperature conditions of the rutting test)，low tem—perature crack resistance(trabecular low temperature bending test)，water stability(freeze—thaw fracturingtests，residual stability test)，fatigue performance(APA fatigue test)．the results show that，High modulusasphalt mixtures have better resistance to rutting performance．as the limit load is about 14 000 N．at一5℃the high modulus asphalt mixture still has a good low—temperature anti—cracking performance．Freeze—thaw splitting results showed that AC一20C(30#)asphah mixture with a high intensity ratio of the freeze—thaw cleavage，with good water stability．

Abstract: Scene graph—based parallel rendering is proposed to build cost—effective distributed graphics sys—tem based on PC cluster in order to meet the need of large scale virtual reality applications．The procedure ofprimitives belongingness determining is speeded up using the fast view frustum culling technology of scenegraph．The relationship between OpenFlight scene data format and the task granularity of sort·first is also re—searched and primitive groups are built based on the hierarchy of scene graph．We have realized a scene graphbased sort—first prototype system which achieved seamless tile using the software way in retained mode．Boththe function parallel of CPUs and the data parallel of GPUs is considered in this system，and it could improveframe rate while We ran large scale virtual scenes．

Abstract: In order to guarantee the power quality of large industrial enterprises and reduce its loss，a strategyof voltage and reactive power control was proposed according to the characteristics of its distribution network．Firstly，control the capacitors based on whether the power factor of monitor point reach the standard，thenthrough the analysis of minimum loss voltage of transformer，to calculate the best voltage of the transformers’low—voltage bus and to control the transformer tap．The simulation results of alarge still mill network provedthe rationality and practicability of this strategy．

Abstract: According to three—tier architecture，a representative example case of the supervisory informationsystem(SIS)is introduced in this paper，which is consistent with the actual information conformity target andrequirement of the first phase project and second—stage site for some thermal power plant．Several key techno—logical problems including network framework，interface design，configuration of software and hardware，func—tion setting are discussed and analyzed．The report form calculating method，the subsystem such as real timemonitoring and data management，performance Calculation and Economic Analysis，operation optimization areall put forward briefly．Practical operation proves this project is effective．

Abstract: The receiver is central module in serial link．Involved in digital—based analog circuit-design technology and negative—feedback dynamic adjustment method，this paper brings forward a high speed serial receiver，which consists of sampling—amplifier，clock-generator，matching resistor．The latter two pans determine performance of receiver．Using Cadence’s SPECTRE software and TSMC’S library of 0．25 am mixed—signal CMOS model，simulation resuhs revealed that the clock-generator produces five 480Mbps equal-spaced clock signals between one another．Time interval between each other keeps 0．41 6 ns with jitter of 35 ps，lock time of 1．8 IXS；the value of resistor rangs within[44．3 n，45．6 n]，maximum time leveling off is less than 6 Ixs，average error is±1．45％，maximum error range within 1．56％．Altogether the whole receiver possess capacity in receiving 480 Mbps serial data．

Abstract: This paper establishes the mode of corresponding equivalent circuit for transmission line coupling inhomogeneous and inhomogeneous media based on the theory of multi—conductor transmission line，simulatesand calculates the crosstalk among three conductor transmission lines on the PCB board using Matlab software．Firstly，the paper analyzes the voltage change of main loop of string on the impact of crosstalk voltage in thecase of the terminal is matched load．Then we analyze the change of the crosstalk voltages in the terminal ac—cess resistance，terminal access reactance，terminal access impedance of the three different terminal load cases，and gets the appropriate conclusions．The results show that crosstalk voltage as the main string loop voltage increases，matched resistance value can reduce the erosstalk voltage，and capacitive load is more significant than inductive load on the impact of crosstalk voltage．

Abstract: The difficulty of the runoff simulation has been increased due to the specificity of the semi—arid re．gion，which is still a hot and difficult topic in current study．The detailed information is hard to obtain becauseof the complicated process of the runoff，SO it is difficult to forecast flood，especially the flood peak forecast．The different characteristics of flood can not be reflected completely if all samples were used to calibrate theparameter of the model．Thus the support vector machine method based on clustering is used．And the LanRiver basin in the seni—arid region is taken as an example to be simulated and tested．The results haveshown that most efficient eoemcient iS beyond 85％．and the modulus of the relatively average error is mostlyless than 1．5％．Additionally，the peak flow modulus of the relatively average error is less than 1 5％。particu．1arly in the flood of large peak flow．the relatively average error is less than 1％．The qualification rate of thepeak flow and the peak time difference is 1 00％．

Abstract: Based on the aqueduct beam element dynamic model with fluid—structure coupling，the seismic response of signal pier aqueduct under earthquake is calculated．In this model，the transverse、vertical、longitudinal deformation and restraint twist deformation，as well as the fluid-structure coupling between aqueduct and water body are all taken into consideration．It is shown the correctness of the solution．The model is practicable and the calculation results provide consults to the anti—seismic design of aqueduct．

Abstract: Depth—mean-flow equations have been derived．through 2-D mean simplification of integration for 3·D folw equations along depth，for super—critical flow in divergent chute with curved bed，in which the influenceof curvature，bed slope and bottom friction on flow are considered．Based on depth—mean—flow equations，characteristic equation system are presented．Numerical characteristic FDM solution has been given for a diver—gent chute with parabolic prismatic bed surface in engineering．Problems for irregular distribution of characteristic mesh points have been solved by interpolating adjustment of computation points for every time step，SO thatthe results can be used conveniently in practical application．

Abstract: Formulation for the solute transport in deformable porous media was presented．The formulation wasbased on the effect of the rate of consolidation or swelling and excess pore pressure or suction dissipation onnonlinear advective component of transport through clay．Three hypothetical cases were evaluated to demon—strate the effect of consolidation，swelling and excess pore pressure on advective—diffusive transport and break—through in clay layer．The results show that consolidation in clay impacts concentration profiles，but does notsignificantly impact breakthrough of the diffusive flux，and consolidation accelerates transport．Swelling underhydraulic gradient application can either accelerate or retard the advective diffusive flux，depending upon theratio of the effective diflusion COmcient relative to the coefficient of consolidation．

Abstract: A model is built for active hydraulic suspension of the quarter—vehicle；Then asuspension systemis designed with pressure feedback contr01．The Modelica language is used in system programming and the Dy—mola is used for simulation．The desirable control parameters can be obtained by debugging．From the testingresponse figure of active hydraulic suspension and passive suspension，we can get that active systems greatlyimprove the dynamic performance．The result proves that we can successfully solve the problem of multi—do—main simulation and optimization by using the Modelica language and the numerical solver of Dymola．