Abstract:

Abstract: This paper diseusses on the mechanism of the resistance of alkali-activated slag, alkali-activatedfly-ash, alkali-activated metakaolinite and ordinary Portland cement used as control sample to exteral sulfateattack. Aecelerated test method (i. e. cycles of weting and drying ) and X-ray diffraction ( XRD) analysis ofthe products of alkali-activated cementing materials after external sulfate attack were used in this paper, ltdraws a conclusion that alkali-activated cementing material mortars are broken because of volume expansionproduced external sodium sulfate salt-crystallization in the pore of the mortars, while ordinary Portland cementmortar is broken because of forming gypsum and external sodium sulfate salt-crystallization with volume expan-sion in sodium sulfate solution of 5% concentration.

Abstract: To solve the problem of asymmetrie information and the influence of subjeetivity in major integratedassessment researches, the method of matter-element analysis was used to evaluate the subjects’ behavior riskof the project, the project risk early waring indicator system which contained criteria and 16 specifie indica.tors was constructed. In order to evaluate conveniently by experts and express experts’ evaluation informationwell and truly , triangular fuzzy number was introduced into the mode! to quantify and standardize the indexweight and evaluation results which were given by the experts after the experts evaluated qualitative indicatorsby linguistic variables, and the weight vector and index vector were obtained based on triangular fuzzy numberafter assembling the weight and the value, then combined with the comprehensive correlation calculation ofmatter-element analysis the early -warning of risk was determined. Finally, empirical analysis demonstrates thespecifie application process, and the conclusion shows that this method is very practical and reference value.

Abstract: According to the factual condition of asphal! pavement, the heat storage capacity, high temperaturestability and durability of common phase change materials used under normal temperatures are tested and ana.lyzed through Differential Seanning Calorimetry ( DSC) and Fourier Transform Infrared $pectroscopy ( F’T.IR ) , other factors such as phase stute transiion, phase change temperature, undercooling, phase separationand high temperature performance are considered as well, and then the proposed polyethylene glycol 4000( PEG4000 ) undergoes the temperature simulation of molding process of asphalt mixture specimen, the resultsshow that PEC4000 is feasible for adding into asphalt mixture as the phase change heat storage material.

Abstract: In order to investigate the water stability of lime-gtabilized soils with small lime content, the sam.ples with 4% -8%6 lime content and 9096 degree of compaction are prepared, the unconfined compresiontest, the splitting test and the compressive resilience modulus test in different soak periods and different wet-ting and drying cycles have been carried out after these samples have been cured in gtandard curing room for90 days. These test results show that, after different soak periods and different wetting and drying cycles, theunconfined compressive strength, spliting strength and compressive resilience modulus of lime-stabilized soilwith 4% .8% lime content decrease sharply at the initial stage, and quickly tend to be constant, In addition,the water stability of lime-stabilized soil will be improved with the increase of lime content.

Abstract: Pavement slab with cavity caused by poor anti-erosion performance of semi - rigid base matcrial isthe main cause leading to damage of cement concrete pavement, Although requirements of the anti-erosion per.formance and stifness of the base material are put forward in the existing design gpecification of cement con.crete pavement, it is only limited within qualitative requirement level. The design index and standard of semi.rigid base material are put forward according to the experiment results and literalure research, Gray systemtheory is used to establish erosion and strength prediction modei of semi-rigid base material, and several pre.dietion formula of erosion and strength are developed, Finally, the material composition design method ofsemi-rigid base based on anti-erosion properties is proposed. Test resuits show that the semi-rgid base de.signed with this design method has good performance.

Abstract: The stress wave speed is the necessary condition to make sure pile length and pile defects positionin low strain integrety testing of foundation pile with the stress wave echo method. Quantilying the stress wavespeed is very dificult, because it is affected by multi-factors. This has been the boleneck in point for develo.ping test technology of foundation pile, In this paper, some factors affecting the stress wave speed were ana-lyzed according to stress wave theroy and experiment results, the quantity relalionships of the stress wave speedin pile and time and concrete age were determined. lastly, five brief methods to quantifying the siress wavespeed in pile were presented to control pile quality for test engineers according engineering practice.

Abstract: The design and construction of large-span overhead jacking culvert beneath the existing railway withlower filing remains a technical problem, This paper denls with the scheme of overhead jacking which is udopted by Mianchi overpass of the extension project of Luosan highway. it elaborates a series of important procedures, such as the beam pier pile checking, jacking force calculation, jacking equipments, rail pile backdesign and the construction conditions etc. . This project therefore solves the technical problem of the key technology concering the design and construction of large-span overhead jacking culvert beneath the existing railway, It provides theoretical foundation and project practice for similar type of projects and offers significanttechnological support for large-span overhead jacking culvert.

Abstract: This paper reviews various methods to prediet the overall effective elastic properties of homogeneousisolropic composites based on the meso-micromechanics, Values of the homogeneous isotropic comparison ma-terials are analyzed corresponding to the upper bound ( VB ) and lower bound ( RB )of common prediction ofthe effective elastic properties, and the upper bound( HSB* )and lower bound ( HSB~) of Hashin-Shtrikmanestimates, and the relationships for these bounds are also dicussed. New bounds tighter than Hashin-Shtrikmanbounds are presented by taking the common estimates, the Voigt estimate and the Reuss estimate, as homoge-neou8 companson materials.

Abstract: Because gear faults have characteristics of being nonlinear and coupling between fault symptoms andfault, BP neural network gear fault diagnosis has slow convergence speed and poor reliability, The BP neuralnetwork gear fault diagnosis method based on genelic algorithm is put forward. Namely, the BP neural networkis used in gear fault diagnosis, and genetic algorithm is applied to optimize the weights and thresholds of thenetwork. So the global optimal value is obtained, The simulation results show that the diagnosis strategy hasthe characteristic of strong diagnosis ability and high diagnosis effciency and improves the gear fault diagnosisprecision and speed.

Abstract: According to the development requirements of our country$ modern coal mine and bureau of mines,a set of simulation experiment device of mine hoist control system based on PiC was studied,designed and de.veloped. This simulation experiment device put the PLC which is used mostly in industry as main controller,and uses the motor as simulated load, By doing experiments,we can siulate the AC mine hoists or the DCmine hoist’s operation situation so that the operators and technical workers of coal mine can better understandand comprehensively grasp the mine hoist’s operation principle and operation method and also achieve thepurposes of training and learning.

Abstract: A new method of developing the low voltage line loss caleulation and load optimized strategy software are proposed, in which Microsoft Visio2003 is used as development platform and VBA is used as secondary development tools. ln order to optimize low voltage load , the combinatorial optimization model which is employed to determine the scheme of three-phase balance load strategy is studied in this paper. The developmentof this software indicates that the lechnique of secondary development for Visio provides a new effective methodfor the development of the graphic low voltage network calculation software.

Abstract: Aiming to solve the problem of significant soil parameter changes influence the effeiency of Vibra.tion, based on the research into the geological characteristics of ground soil, a new fuzzy controller is de.signed. Based on the on-line adjustment of changing in frequency, this controller has fast and accurate re.sponse and slrong anti-interference ability for the pile hammer in the process of pile driving, "’he purpose ofimproving the working eficieney of the pile hammer is achieved , The simulation and the field test result indi-cate that this parameter self-adjusting fuzzy controller used in the researeh of the on-line identify the frequencyof near-resonant vibration can achieve better result than ordinary fuzzy controller.

Abstract: In view of the long fault localization time and fault clearance in mid-voltage power grid, a simpleautomatic and graphic positioning scheme of software system is proposed based on a combination of tree-like topological structure and the vector operations of monitoring nodes information for the mid-voltage power grid.The naming rules and vector information seltings of the monitoring nodes in software is analyzed. The judgemethod in which the fault lines and line segment are most likely to occur is presented, And the result displayedby color in mapobject component is easily understood. On-site running proved that the above scheme is correctand feasible, speed of fault localization is fast, and the graphic display is accurate, and thus the system makesfault treatment easier and more convenient.

Abstract: To establish the dynamics equations of the vehicle half-car model, LQR( linear quadratic regulator)controller of active suspension is designed based on stochastic linear optimal control theory, and a simulationmodel is built in Matlab/Simulink environment for the realization of this control strategy, The analysis of simu-lation results in the time domain and frequency domain shows that active suspension with the LOR controllercan effectively reduce the body acceleration and suspension dellection, and can be used to improve vehicle comfort.

Abstract: For the sake of geting more precise curves, the paper introduces the linear inlerpolation methodand section excitation characteristic curves, First, the paper makes interpolation to the linear part of measuredvoltlage-current characteristic datn, the weight of linear data is increased with more linear data. Second to theexcitation characteristic curves of PTs, the paper adopts the 7 order polynomial function before the part of satu-ration depth and uses linear model at the part of saturation depth ; Last, the paper fits the excitalion character.istic with the aforesaid and the least square method. On one hand, the paper solves the problem of lacking da-ta. On the other hand, the calculation sample shows that the fitting accuracy has been greatly improved beforethe part of saturation depth, At the same time, the fting accuracy is not reduced at the part of saturaliondepth with linear model, Above all, the tolal ftting accuracy is improved.

Abstract: The frst-order system model and second-order system model for dynamic characteristic of temperature sensor are analysed, The second-order system is not a underdamping system and that there are similarityand intercommunity belween the step responses of the two systems are pointed out, and then that the dynamicmodels of temperature sensor can be unifed simplified as the first-order system model is put forward, Thetransfer function of compensating circuit which can make a frst-order system to be compensated as a perfectall-pass system is derived. The active filter circuit which can realize the transfer function is designed, and thedesign formulas for calculating the circuit element parameters by therma! time constant of temperature sensorare given out. That the output voltage of signal conversion circuit are linear and proportionate to the sensor’stemperature, and that compensating circuit and signal conversion circuit have sufficiently wide pass band, arepointed out as the two necessary conditions realizing compleie compensation to dynamic characteristic of temperature sensor using hardwear.

Abstract: The method of solving the optimal control problem for integer-order systems is extended into frac-tional-order in this paper. The optial control of the systems deseribed by Caputo’s fractional-order differenti.al equation is investigated. The state equation, concomitant equation, control equation, transyersality condi.tions and terminal constraint equations of optimal control for fractional-order system with fixed terminal time,free terminal state and fixed terminal time function constrnined end-point is proposed and proved exaetly in the paper.

Abstract: Theral analysis of Organic Rankine Cycle(ORC)drivenDy low-temperature waste neat was investigated based on the first and second laws of thermodynamics. The system was simulated with the softwareAspen plus. The effects of superheat, subcooling, evaporation temperature and condensing temperature on theperformance of the system were analysed respectively. The results show that the system with saturated workingfuid gives the best performance, the thermal efficieney and exergy efficiency were improved by inereasing e-vaporation preseure or reducing condensing preseure, The regenerative ORC gives belter performance than bas.ic Rankine cycle.

Abstract: ln this paper, CFD numerical simulation and periodic whole cross-ssection computation model ofbafile-plate heat exchanger and shutter baffle heat exchanger which tube bundle arrangement with equilateraltriangles are adopted to study the changes of the performance of heat transfer coeficient, flow resistance, com.prehensive performance with Re. The simulation results indicate that two kinds of heal exchangers’ heat trans.fer coefficient and shell.side pressure loss increases with the increase of Re, baflle-plate heat exchanger’ heattransfer coeffcient is greater than shutter baffle heat exchanger, it is about 1, 32 times larger than shutter baffleheat exehanger, but the pressure drop is much greater than shutter bafle heat exchanger, it is about 2.4 timeslarger than shutter baffle heat exchanger, their comprchensive performance decline with the increase of Re, a/AP of shutter bafNle is almost 2 times larger than baffle-plate heat exchanger, this rellects shutler baffle heatexchanger has significant flow drag reduction performance in the case of higher heat transfer.

Abstract: In this study, chitosan resin was prepared with an improved drop-ball-forming method using chi.tosan as the raw material. Epichlorohydrin was used to cross-link the resin in order to enhance rigidity of res.in, and a new chitosan cross-inked resin was synthesised, The pH of solution, temperalure, time and initialconcentralion of Pb( ll ) were discussed to assess the adsorption performance. Besides, adsorption thermody-namic and kinetic of Pb ( Il ) was studied, The results showed that the pH was the main influencing factor,after 4.5 hours of adsorption at pH =6.0 and 30 ℃, the maximum adsorption capacity ( 105.0 mg/g) wasreached. Moreover, Temkin equation and Pseudo gecond-order equation were used to describe the thermody.namic and kinelics. The correlation coefficients were 0, 9995 and 0, 9926 respectively. The results showed thatthe removal mecbanism may include physical adsorption and chemical adsorption.

Abstract: The corrosion behaviours of T2 copper and 1060 aluminum are compared via pure corrosion and gal.vanic corrosion test in R22 refrigerant and $% HCl, H,$O,, NaOH, and NaCl solution. The results show thatthe pure corrosion speed of copper in all these media is quite low, showing good corrosion resistance, mean.while the pure corrosion speed of aluminum in these media is of great difference, Aluminum in R22 refrigerantshows similar corrosion resistance to copper, and the corrosion speed is only 0. 041 mm a-1. The corrosionspeed in NaCl is 0. 063 mm · a-1. However, the corosion of aluminum in HCl and NaOH is catastrophie.T’he results of copper-aluminum galvanic corrosion show that the corrosion of aluminum is accelerated and thecorrosion of copper is inhibited. Aluminum can replace copper as refrigerator heat exchanger materials, butsurface coating treatment is necessary.

Abstract: Aiming at the problem of low conductivity of organic phase change material, two-dimensional nu.merical simulation on heat transfer enhancement of phase change of paraffin wax by adding porous media wasconducted with the CFD software. The results showed that both Al foam and graphite foam could improve heattransfer rate effectively,and the efieet of heat transfer of Al foam is superior to that of graphite foam, and theefective thermal conductivity of porosity/ parafin wax composite materials is greater, heat transfer rate is fas.ter ; the solidification time shorten, And the temperature of corresponding points in device is lower after thesame solidfication time with the decrease of porosity.

Abstract: To Simulate the traditional fermentation, P’i’FE membrane is applied in the separation of ethanol/water vapor in the non-condensable gas, This paper not only analyses the operating conditions such as the con-centration of ethanol in the non-condensable gas, the temperature and the downstream pressure infuence onthe membrane’ s separation performance , but also compares the PTFE membrane with the ePTFE membrane’s influence on separation . The result shows that with the increase of the concentration of ethanol in gas, thetemperature and the downstream pressure, the PTpE membrane’’s permeation flux increases, the permeationfux conforms to Arrhenius equation. With regard to the PTpE membrane’ s separation factor, it increases withthe inerease of the concentration of ethanol in gas, the temperature and decreases with the inerease of thedownstream pressure. ePTfE membrane which has better separation performance compared wih PTFE mem.brane is benefcial to the separation of ethanol/water vapor.

Abstract: The curing kinetics of bisphenol A based epoxy resins (E -51) and curing agent used in the TAFepoxy asphalt ( J -2 ) was studied by non-isothermal differential scanning calorimetry ( DSC) technique at dif.ferent heating rates. Aocording to the DSC graphs, the kinetic parameters were obtained and the kinetic modelof the curing process based on n order reaclion equation was set up using Kissinger and Crane equation. Theresults showed that the curves calculated by the theoretical model show a good agreement with the curves oblained from the experimental data. Winder the 5 .. 25 K/min hating rates, the kinetie model can describe thecuring process perfectly , lay a theoretieal foundation for the curing mechanism of epoxy asphalt and provide thebasis for the determine af the reasonable curing technology.

Abstract: Heat transfer characteristic of absorption heat pump in absorption heat pump was experimentallystudied. Comparative experiments were conducted using the grooved pipe and the smooth pipe with differentdimensions. "The results showed that directly exporting absorption heat with heat pipe could get a good result.What is more, the film heat transfer coefficient of the grooved pipe was 2 to 3 times as much as that of smoothpipe, and the mass transfer coefficient was twice as much as that of smooth pipe. These results provided abasisfor study on absorption heat pump with compact structure and high efficiency.

Abstract: Based on the study of pharmacognostic characteristics of ceratostigma plumbaginoides bunge, theherb’ s constituents from the petroleum ether - soluble portion in the 95 9 ethanol extract were isolated andpurified respectively by means of chromatography. Five compounds were isolated. And these compounds wereidentifed by modern spectroscopie technology, such as MS, ’H-NMR, "’C-NMR, DEPT and 2D.NMR( HM.BC, HSQC) ete.. They were respectively elucidated as plumbagin ( I ), dis( 2-methylpropyl) ester( l ) ,Acetovanilone( Ⅲ ),β-sitosterol( I),6, 22-dien-3-hydroxy-5,8-epidioxy-(3β, 5a, 8β, 22E,24R)-stig-masta( Y ). Compounds above were isolated for the first time from ceratostigma plumbaginoides bunge exceptplumbagin, The systemalical study provide experimental data for the quality evaluation, clinical use safety andnew medicine development of this specie8.

Abstract: In this paper, we introduce the independent Component Analysis ( ICA) and Quantum ParticleSwarm Optimization ( PS0 ) brielly. As the ordinary gradient algorithm of ICA technology is easy to fall into loeal optimum , we proposed quantum-behavior based particle swarm optimization and independent component a.nalysis for blind source separation combining new algorithms. This algorithm takes negative entropy as the ob.jeetive function of independent component analysis, replaces the ordinary gradient algorithm with QPSO algorithm and separates the instantaneous mixed signals, All the steps of this algorithm are given in this paper.Experiment is show that the proposed algorithm can effectively achieve the image of the blind source separation, Compared with other algorithms, this algorithm shows belter performance.

Abstract: Based on the depth spectrum of linear cyelie code of length n over the integer residue class ring 2p.( i= 1 ,2 ,….. ,/) , according to the Chinese remainder theorem , the generator polynomial of cyclic code of lengthn (p, is nol exactly divisible by n,i=1,2,…,!)over the integer residue class ring Z„( M = p"’p?’….p"’ andP, ,P,,…,P, are different prime factors of M) is studied, And the depth spectrum of linear cyclic code oflength n over Z, is given in the for of multiset.

Abstract: A real-name train ticket system based on the biometrices of palm vein is proposed, By using bio.metric authentication technology and two-dimensional bavcode technology, palm vein image of the passenger iscollected , vein network characteristics is extracted, and then feature information is embedded into the two-di.mension barcode on the ticket, it can protect paseenger in formation security while achieving real-name ticketsystem fanctions. The system is implemented on the AM3$17 development platform provided by Tf company,experiments and test result proves the effectiveness and practicality of the system.

Abstract: In order to detect boundary points of clusters efficiently, we present an algorithm of boundary pointsdetection based on local qualitative factors ( BRINK). This algorithm uses weighted euclidean distance to solvehigh dimensional data problem which most of the existing clusters detecting algorithms can not deal with. Ae.cording to the feature of local qualitative factors ,the individual finds that it is lightly larger than 1 in boundarypoints of clusters, we can detect the boundary points with the former two processes, As shown by the experi.mental results, BRlNK can deteet boundary points in noisy high-dimensional datasets containing clusters of ar-.bitrary shapes,sizes and different densities.

Abstract: An optimized image denoising algorithm is proposed based on wavelet transform direetional information and SVD, As the image noise is mainly concentrated in the high-frequeney, and the coefficient is smalluging singular value decomposition of large singular values and corresponding eigenvectors reconstructed imagenoise out, but because of the inherent direction of the singular value decomposition, denoising result of diagonal sub-image reconstructed is not satisfactory, we rotate the diagonal sub-image to the level ( verlical) ,thenuse the singular value filtering, at low-frequency only use simple wiener filter, and finally use anti-wavelettransform to reconstruct the denoising image. Experimental results show that this method is effective in denoising, while it retains the original details.

Abstract: Based on loeal discriminant embedding, an efficient nonlinear subspace leaming method, LabelMuliple Kemel local Discriminant Embedding ( LMKLDE ) , is developed, Firstly, according to the label in-formation of given data set, local kerel function is defined and multiple kernel is gained, Then, different lo-eal kerel funetions are merged by linear combination to form final kernel funetion. Finally, LMKiDE is de-veloped by introducing label multiple kernel to LDE in order to deal with datasets of highly nonlinear struc.ture. Experiments on ORL, and Yale face database demonstrate the effectiveness of the proposed method.