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Abstract: To solve the problem of contract-based cooperative spectrum sharing between multiple primary usersand multiple secondary users,we put forward a contract design method based on statistical theory to maximizethe total utility of primary users. Firstly，the primary users make full use of the accepting contract statisticalinformation of secondary users to design a reasonable contract. Then，the primary users according to the statis-tical expected utility to obtain the optimization problem of maximizing theirs total expected utilities. Further-more，we simplify the problem in theory and exploit the genetic algorithm to derive the sub-optimal solution.The simulation results and analysis show the contract design method can solve the problem of contract-basedcooperative spectrum sharing successfully.Compared with the DMA-UI,the approach we formulated can makeprimary users obtain a higher utility， and further improve the primary users’energy efficiency and spectrumefficiency.

Abstract: When dealing with massive terrain data ，the advantage of hardware performance can’t be fully uti-lized. This has become a bottleneck，which restricts the speed of massive terrain tiles rendering. This paperanalyzes the key factors that affect large-scale terrain rendering speed，and proposes a parallel algorithm formassive terrain data processing. The algorithm adopts double buffer queues and divides large scale terrain ren-dering into two parallel processing which includes data processing and rendering. The two buffer queues areresponsible for data reading and writing operations in turn. The loading priority of terrain tiles is consideredand tasks are allocated based on the priority. The experimental results show that this approach improves thespeed of rendering massive terrain tiles greatly.

Abstract: The accuracy of characteristic parameter and pattern recognition rate among speaker voiceprint au-thentication technologies are important. In this paper, adaptive Mel filter banks are designed after the recogni-tion of the gender, and the SOC ( system-on-chip )design of high efficiency speaker voiceprint feature extrac-tion is completed on the EP2C35F672C6 development board of Alteras DE2 series. First of all，two low-passfilters cutoff frequency of 200 Hz and 400 Hz are designed to complete the pitch frequency detection of maleand female students. Then, the parameters of Mel filter banks are calculated by the highest frequency deducedfrom the frequency range of speech spectrum. Then, Verilog-HDL code encapsulated as lP core for SOC de-sign, compilation, simulation, and download authentication are finished on the Quartus ll platform. The re-sults show that adaptive Mel filter banks can improve both the accuracy of characteristic parameters and thespeed of recognition.

Abstract: There are many semantic interoperability problems between different ontologies, such as: semantic conflicts and structural heterogeneity, which seriously affect the knowledge sharing and reuse between ontologies; and also bring great difficulties to the ontology query service, for this reason, a WordNet-based ontology query framework OQ-WordNet is proposed. The framework first uses WordNet, a semantic lexicon library, to accurately compute the similarity of concepts between different ontologies (source ontologies); then generates a target ontology for all source ontologies by ontology integration and ontology mapping methods, and establishes the semantic mapping relationship between them; finally, OQ-WordNet uses SPARQL, an ontology query language, to implement the query function between ontologies.

Abstract: In order to deal with the influence of the factors such as light, shade, movement of object and etc.,the integral graph method is used to extract the Haar-like features of the target template, and the features arecompressed by a random sparse matrix which meets the limited equidistant conditions( RIP), then the con-struction of the target features dictionary is simplified. Meanwhile, the background information is added in thedictionary, and the simple relationship between the target and the background is used to improve the accuracyof tracking. At last, the target can be reconstructed in block by using the block orthogonal matching pursuit(BOMP)reconstruction algorithm, through which can enhances tracking speed. The experimental results showthat, the block orthogonal matching pursuit tracking algorithm based on compression feature is powerful in val-id target appearance model construction. And it also enhances the tracking stability and improves trackingspeed.

Abstract: In order to investigate the relationship between proton conduction rate and intermolecular hydrogen bond strength of tetrazole system, the geometric structure optimization and frequency analysis of tetrazole dimer N4 CH2-N4CH3 at the level of B3 LYP/6-311++ G(2d,2p) were carried out by using density flooding theory, focusing on the structure, energy, natural bond orbital (NBO) and The QST2 method was used to study the dynamic processes of proton transfer in the eight dimer interrogations at the B3LYP/6-31+ G(d) level, and six filtered states were found and their transfer energy barriers were calculated. The results showed that tetrazole and protonated tetrazole cations formed the dimer N4CH2-N4CH3 with strong intermolecular interactions through N...H-N hydrogen bonding, and the N...H-N hydrogen bonding exhibited obvious red-shift characteristics; N ...H-N hydrogen bonding interaction stabilization energy is mainly the interaction between the lone pair electron orbital of N atom and the anti-bonding orbital of N-H bond; N...H-N hydrogen bonding strength is the main factor affecting the size of proton transfer energy barrier, i.e. directly affects the proton conduction rate in the tetrazolium system.

Abstract: SAP0-56 molecular sieve was synthesized hydrothermally using N,N,N’,N’,-tetramehtyl-hexane-1,6-diamine (TMHD) as template agent,pseudo-boehmite as aluminum source,white carbon black as sili-con source,and phosphate acid as phosphorus source.The crystal phase and crystallinity of product were i-dentified by XRD. The influence of synthetic conditions on the molecular sieves was studied and the crystalli-zation area of SAP0-56 molecular sieve was obtained. The results showed that the crystallization area of SAPO-56 was n(0.16

Abstract: By using water as extraction reagent,the polysaccharides in Radix Aconiti Kusnezoffi were extrac-ted.The results showed that optimum extraction condition was 90℃,4 h,and liquid to material ratio 1:50.Four polysaccharide complexes were prepared using four metal ions(Ca2+,Zn3+,Cu2+,Fe3+) and polysaccha-rides from Radix Aconiti Kusnezoffi,respectively. All complexes were evaluated for biological activity againstthree human cancer cell lines (HepG2,MCF-7 and HT-29) by the standard MTT method, and the resultsshowed that PRS-Cu possessed the highest growth inhibitory effects.The complex was characterized by UV,IR,D,SEM, and TGA.

Abstract: Abstract:High performance methane gas sensor based on micro-hotplatform ( MHP) was designed and fabri-cated. MHP is widely used in semiconductor gas sensor because of its low power consumption,small volumecharacteristics.The MHP is fabricated based on lC compatible MEMS technology. Micro-nano gas senor wasprepared through in-situ fabrication of tin dioxide using template method. The power consumption of the sensoris only 39 mW , and the response time is 2 s,and the sensitivity to 714 mg/m’methane is as high as 1.19.Because of high signal noise ratio,the detection limit is estimated to be 18 mg/m’through liner fit.The highperformance and low cost sensor is expected to be widely used in industry and safety monitoring.

Abstract: In order to solve the problem that electrospinning process is hard to control，FEA tool softwareCOMSOL Multiphysics was used to simulate the the electric field orientation within the electrospinning. Basedon the vector maps and contour lines, the electric fields distribution was analyzed. Which includes single-nee-dle electrospinning device，electrospinning device with circle and orparallel auxiliary electrodes. Experimentwith parallel auxiliary electrodes was conducted，and the deposition area with the ellipse shape matched thesimulation result.

Abstract: Cu-doped SnO was synthesized via a simple and facile oxalic acid water hydrothermal route by u-sing polyvinylpyrrolidone as surfactant and stannous chloride as well as cupric chloride dissolved in this solu-tion. The structure and morphology of the as-synthesized samples were characterized by XRD,SEM and TEMetc.And the influence of the doping ratio of copper ( 0 ~ 20% ) to gas-sensing properties were analyzed sys-tematically by using a computer-controlled measure system of WS-30A. The gas sensing results indicated thatthe appropriate proportion of Cu-doping can improve the gas-sensing properties,especially the 10%,in whichthe response time,recovery time,selectivity and durability of sensors towards to hydrogen sulfide gas improvedsignificantly,and the optimum response temperature decreased dramatically to as low as 120 ℃.Finally,themechanism of the SnO gas-sensing properties enhanced by Cu-doping was discussed.

Abstract: One-dimensional rod-like Zn0 nanostructures were synthesized by a low-temperature hydrothermalprocess. The morphological feature and phase was detected by using x-ray diffraction and scanning electron mi-croscopy.Ine sensIuvIy or gas sensors naseg on ne Lnu nanoroas can reacn 33./ l,ana cover ana recovertime can reach up to 7 s and 9 s,respectively,for 500 × 10~6 ethanol.The selectivity of this gas sensor is alsovery well.In addition,the mechanism of gas sensing was discussed in the theory of electron liberation.

Abstract: In this paper,a static nonlinear analysis of SRC frame has been made,and the analytical results agree well with those of the tests. In the same parameter settings,the static nonlinear analysis of a 2-span,3story SRC column-steel beam hybrid frame is then carried out to learn its seismic performance when the steelratio of SRC column and linear stiffiness ratio of beam to column is different.The results show that the bottomstory of SRC column-steel beam hybrid frame achieve the strong column-weak beam failure mode,so the overall structure experienced a long plastic deformation stage and exhibited good ductility. With the increase of thelinear stiffness ratio of beam to column,the failure of hybrid frame gradually turned from the overall"strongcolumn-weak beam”mode into "strong beam-weak column"mode, and the structure ductility reduced Significantly.According to the calculation results,a reference value range 0.3 ~0.4 is suggested for line stiffnessratio of beam to column in SRC column-steel beam hybrid frame design.

Abstract: In order to achieve optimum utilization of time-space resources at intersections,volume,speed anddelay were selected as three parameters to develop an efficiency model for traffic flow.In addition,the efficiency model for intersection was constructed based on multi-traffic conflict points.Four efficiency-orientedmodels for four popular control modes including uncontrolled intersection mode,two-phase mode,three-phasemode and four-phase mode were proposed,and the efficiency values were calculated according to the field volumes and control modes.The results indicate that the condition for an intersection under un-controlled mode.two phases mode and four phases mode to reach its optimal efficiency is that the maximum volume is smallethan 100 vehicles,between 100 and 400 vehicles,and bigger than 400 vehicles,per hour per approach,respectively.

Abstract: In order to improve the general solution of pile internal force calculation based on foundation coeffi-cient method,the general solution considering the width nonlinearity of piles was derived based on Winkler as-sumption and method of power series, and the linear general solution was proposed through simplification.Thepresent computing theory based on foundation coefficient method was developed and unified as a result of thisstudy.From the analysis of initial value conditions,4 kinds of pile top boundary and 5 kinds of pile endboundary.which are commonly used at present .were summarized.

Abstract: Based on long-span and steel-concrete bridge,the perfect stochastic fluctuating wind field processis generated to simulate stochastic wind loads by using improved WAWS method. Then,the FEA model oflong-span cable-stayed bridge is established by using ANSYS.Based on ANSYS parametric design language,one calculation program is prepared to calculate the flutter and buffeting analysis for cable-stayed bridge withsteel-concrete composite girder.Some meaningful conclusions are drawn that flutter and buffeting would causevibration fatigue to reduce the lifetime of bridge members and endanger the safety of builders and machines.1nu,uei anu bueung asu uave wau euecus ou peuesu.al count anu ue seulny 0 mg-speeu 10au.Some meaningful references,which are used to calculate flutter and buffeting of long-span and steel-concretebridges,are provided for further research on wind-induced vibration for long-span bridges.

Abstract: The finite element analysis software DEFORM-3D can be used to simulate forging process,and itsprecision is high,but the animation based on graph is not ideal at present,the post processor can not provideinteractive visualization.So a new method based on DEFORM-3D and Open Inventor to achieve the virtualsimulation of forging has been proposed.Using C ++ to achieve conversion of two data formats,so that theOpen Inventor can read in the geometric models of finite element calculation.Using the sensor mechanism ,engine mechanism and so on,we complete the movement of top die and plastic deformation of cross shaft dur-ing forging,realize the virtual simulation of forging process on Open Inventor platform.

Abstract: In order to predict the fault type and the fault position of rotating machinery more accurately, a newprediction method of frequency spectrum based on full vector support vector regression is proposed. The newmethod uses the full vector spectrum technology to merge the homologous double channel signal information,and uses support vector regression to predict the full vector spectrum characteristic parameters,which can en-sure the comprehensiveness of the training data and the accuracy of predict result. This method can forecastthe frequency spectrum of the vibration signal accuracy and can then give the technical based for fault type andfault position predict. The experimental results of the frequency spectrum forecast of a 1000 MW steam turbineshaft show that this method can predict fully and accurately the spectrum’s structure of vibration signal.

Abstract: In the subjective evaluation of the NVH performance of a car model, it was found that after the suspension adjustment, the steering wheel vibration was still too large under the idle air conditioner condition, which affected the comfort of the whole car. Lab equipment was used to test the steering wheel vibration at idle speed, and the preliminary judgment was that the cooling fan fundamental frequency had a greater influence on the steering wheel shaking. Using the experimental modal analysis theory and method to analyze the excitation source, main transmission path and response point respectively, it was found that the cooling module (CRFM) and steering wheel modal parameters of the car were consistent with the cooling fan fundamental frequency. The test results show that the steering wheel shake can be significantly reduced by improving the structure of the damping pad and adjusting the cooling fan speed in combination with the actual situation of the vehicle.

Abstract: Based on the principle of corona discharge,a needles-net structure generator was designed.The i-onic wind excitation was implemented,and it was used for high power LED chip heat dissipation. The experi-mental study of generator’s electrical properties change and its effect on the properties of high power LED heatdissipation under different discharge gap,voltage polarity and electrode arrangement were carried out. Thecooling performances of the ionic wind generator and the cooling fan were compared. The results show that ,the heat dissipation performance of negative corona discharge is superior to the positive corona discharge underthe same conditions, and the discharge spacing is smaller,the lower LED pin temperature it is.The best cool-ing performance will be reached at 1 x1l needles array form,and the lowest LED pin temperature is 52.3℃when the discharge power is more than 10 W. The device can realize the heat dissipation effect more close toa cooling fan,and it is suitable for high power LED chip heat dissipation.

Abstract: In order to further improve the stimulation focus of the circular coil, a circular coil with deformation along different positions was designed. The spatial magnetic field distribution of the deformed circular coil was analyzed by numerical simulation at the folding position and folding angle. Compared with the conventional circular coil, the magnetic field focus of the deformed circular coil folded unilaterally at 0.5, 1 and 1.5 cm from the center of the circle was significantly improved, and the optimal folding angles were 60°~90°, 60°~105° and 75°~105°, respectively. The spatial magnetic field focus was improved by folding the deformed circular coil at 2 cm from the center of the garden on one side and at 2 cm from the center of the garden on both sides.

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