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The flexural behavior of reinforced concrete beams strengthened by CFRP is analyzed by using the way which connected tests with finite element simulation.First,through the test to get the load data of one unstrengthened and one strengthened reinforced concrete beam.Then,the finite element model is carried out based on Ansys finite element analysis software.The reinforced beam carrying capacity is improved based on the test data and finite element calculation results.Steel bars stress change curve, CFRP stress curve and the load displacement curves are in good agreement with experimental results.

The printing machine is a sort of large-scale equipment characterized by high speed and precision. A fault diagnosis method based on kernel principal component analysis (KPCA) and K-means clustering is developed to classify the types of feeding fault. The multidimensional and nonlinear data of printed image could be reduced by KPCA to make up the deficiency of the traditional K-means clustering method. In this paper, it is experimentally verified that the classification accuracy of the combined method is higher than the traditional clustering analysis method in feeding fault detection and diagnosis. This method provides a shortcut for the determination of fault sources and realizes multi-faults diagnosis of printing machinery efficiently

An integrated electricity information security monitoring platform is presented, electrical information security integrated real-time monitoring of the state power applied information security systems, security equipment, network equipment, network boundaries, desktop computers, to improve information security monitoring, early warning, emergency response and defense capabilities to protect IT hardware, software and network security, which can guarantee continuous, reliable and efficient operation.

A system includes three power information security defense line is constructed, to achieve the information network, information outside the network, scheduling data network depth protection. According to the information security protection requirements, starting from the overall structure of information systems, taking into account the information system to schedule production system as the core, based on independent research and development of core information security isolation unit, set up three lines of defense in the power of information systems, electricity secondary system, information network systems, information systems outside the network partition protection.

This paper provides the opportunity to present the performance evaluation results of Shanghai’s bus lane system in 2012. The evaluation results show that development of Shanghai’s bus lane system has fallen into a dilemma. The effectiveness of bus lanes was presenting a descending tendency. The average travel speed of bus lanes was only 14.6km/h, which was lower than the baseline of Shanghai’s transit metropolis construction targets. “Empty lane syndrome” existed in three newly implemented bus lanes. After 2010 Shanghai Expo, no new bus lane was built and the construction of bus lane came to a standstill. Lax enforcement resulted in high violation rates, which significantly reduced bus speed. Due to the increasing congestion in general purpose lanes and underutilization of bus lanes, attitudinal survey results revealed a negative public sentiment towards bus lanes. The grim situation urges a transition to sustainable development of bus lanes, namely, back to way to seek for efficiency and quality instead of blindly expansion.

The establishment of independent control area for JiBei grid will improve the flexibility of regulation for local units, and absorb more wind power and other clean energy. However, due to the high proportion of wind power capacity and the fluctuation and intermittent of wind power, it presents a challenge to the power supply safety. In this paper, based on the prediction of regulation demand and regulation speed in different time scales, dynamic hierarchical control method is proposed. Several strategies of hierarchical control under the emergency of steady climbing, reverse and fluctuations are established. Hence, it improves the capacity of power supply safety and the proportion of wind absorption. Finally, based on the measurement of characteristics of wind fluctuation, the value of reserve capacity in different control levels is calculated.

A design of capacitor-coupled ECG test system is introduced here. The extremely weak ECG signal was picked up with capacitor coupling sensor, and was then buffered, filtered and magnified to fit the requirement of analog digital converter. The measured data was then converted and processed by a microcontroller. The ECG signal can be recovered and stored, analyzed by intelligent terminal. The test shows that this method is applicable and would be used widely.

Evaluation of slope stability is a complex system problem with uncertainties. Based on the Projection Pursuit (PP), the Particle Swarm Optimization (PSO) and the Logistic Curve Function (LCF), a new model for evaluation of slope stability is developed, which is referred as Projection Pursuit based on Particle Swarm Optimization (PSO-PP). The model, on the one hand, uses PSO to optimize the projection index function and the parameters of LCF. Thus it would ensure the accuracy of the parameters used in the model. On the other hand, the nonlinear relationship between projection values and empirical grades is established according to LCF. The test results of the model show that the model has a very good precision. In this study, the evaluation results obtained by applying the model developed here into Jinping I site hydropower plant are well consistent with the practice situation. It indicates that the model here is feasible and effective in the evaluation of slope stability.

Early warning thresholds for slope instability were discussed in this study by means of rheological tests and field measurements due to availability and effectiveness of the data. Five warning levels were specified to take proper measures in different emergent cases. The left bank slope of Jinping I hydropower station was studied as an instance to implement the strategies introduced in the study. The surface displacement thresholds were obtained by analyzing long-term observed displacements (the former three warning levels) and the rheological tests on the rock mass (the last two levels). The results gave out that the thresholds of surface displacement rate for different warning levels were 0.30mm/d, 1.15mm/d, 3.00mm/d and 5.00mm/d. These results could be potential references for other projects.

In our work, we aimed to improve the interfacial properties of the Polyetheretherketone (PEEK) polymer/carbon fiber (CF) by treating the fibers with wet chemical method, a higly oxidative chemical solutions called piranha solution and chromate solution. The changes of the surface funtional groups, chemical compositions and structures of the carbon fibers were characterized by X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared spectroscopy (FTIR),surface morphology was studied by scanning electron microscopy (SEM), mechanical interfacial properties of the composites was evaluated by means of interlaminar shear strength (ILSS) tests. The results indicated that graphitic carbon was the major carbon functional component on the carbon fiber surfaces and other functional groups were also presented, such as C–O, C-OH, C = O. Consequently, these introductions of oxygen functional groups onto the carbon fiber surfaces led to an improvement of the ILSS of the composites.

A new displacement time series predicting model was proposed by combining the Support Vector Machines and the Markov Chain, which was named as Support Vector Machines and Markov Chain (SVM-MC) model. Through studying the measured displacement, SVM optimized by particle swarm optimization (PSO) was used to forecast the trend of macro development in roll. Markov chain was applied to compute State Transition Probability Matrix. By classifying system state and calculating absolute error and relative error between measured value and SVM fitting value, the predicting results are improved. The model was used on predicting displacement time series of a high slope of a permanent lock. The engineering case studies indicated that the model was scientific and reliable, and there was engineering practical value for displacement time series forecasting.

Simulation method was applied to study the fouling behavior during the Micro-filtration of Semi-conductor wastewater. In the numerical model, concentration dependent physical properties such as suspension viscosity, density and generalized particle transport diffusivity were considered. The mechanism of suspension transition from liquid phase to gel phase was adopted to characterize the formation of membrane fouling. Fouling resistance distribution along the membrane surface was obtained from the simulation. The results revealed the mass transfer character in the concentration boundary layer and its influence on the formation of membrane fouling. Agreement between the simulation and the experiment results demonstrated the applicability of this numerical method in evaluating membrane fouling during Micro-filtration.

This paper proposes a joint spatio-frequency resource model and management strategy in cognitive MIMO (Multi-Input Multi-Output) systems by exploiting the spatial signal processing ability provided by multi-antenna techniques. With the scheme cognitive system could coexist with the primary in one occupied authorized frequency channel without interfere with the later. Accordingly cognitive transmission could be carried out even there is no idle spectrum available. This is a complement to traditional CR in which the performance of cognitive user depends to a great extent on the availability of spectrum hole. Simulation results show that compared with conventional CR, the proposed method could effectively improve the performance of cognitive user on the premises that no interference is imposed on the primary.

This paper proposed a soccer robots attitude detection method based on the principle and vibration mode of cymbal piezoelectric composite transducer. Cymbal piezoelectric composite transducers and MEMS-based three-axis low-g sensor were set on some different support points of soccer robot's joint to accomplish attitude detection. The signal processing circuit and algorithm software were designed. The research results showed that the performance parameters of the soccer robot falling down attitude detection system based on cymbal piezoelectric composite transducer are better than the other sensor, such as the sensitivity, correct, undetected fall and stability duration, etc. The experiment results showed that the detection accuracy for falling down of the soccer robot can be 98% and the stability duration can be 60 minutes.

In this paper, the heat transfer of pineapple juice was investigated on a new evaporator with ultrasound. The effects of various factors on the heat transfer coefficient were analyzed, including feed rate, evaporating temperature, temperature difference of heat transfer, and juice concentration. The proposals of design and operation for this new evaporation were also discussed.

In this paper, the apple juice was used as the experimental medium, the main factors, such as the evaporating temperature, feed rate, temperature difference of the heat transfer and concentration, were analyzed, the heat transfer of the juice was studied on a heat pipe evaporator, a dynamic model of the apple juice during the constant volume heat process was built up, the heat transfer during evaporation, affected the heat transfer properity in evaporating process were investigated, the experimental relating formula was obtained finally. The above informations could provide some help to design new evaporators and optimize the fruit juice concentrating parameters.

A new classification algorithm of M-ary FSK signals based on the extraction of signals features is presented in this paper. The implementation of the methodology does not require any apriori information. By extracting some basic features of intermediate frequency signals both in time domain and frequency domain, the classification of M-ary FSK signals is achieved. Simulation result shows that the proposed algorithm can classify 2FSK, 4FSK and 8FSK signals effectively under AWGN and and still keeps a good performance even at low input SNR.

Based on the phase distribution which is defined in this paper, a new classification algorithm of M-ary phase shift keying (PSK) signals is proposed. To classify the modulation type of the M-ary PSK signal, the phase distribution of the unclassified signal is calculated firstly, and then the characters of the signal modulation are extracted by computing the FFT of the phase distribution. Moreover, the method is improved in this paper that it is extended to MPSK baseband signals with frequency offset, and the calculation complexity is reduced. Simulation result shows that the accuracy rate of the classification of BPSK, QPSK and 8PSK signals can reach 98.5% when the symbol length is 500, SNR is 3dB, and 16PSK signals can also be well classified when the SNR improves to 9dB.

Generation scheduling is one of the major contents of power dispatch and has an important impact on the safe and efficient operation of power grid. As a newly-established provincial power grid, Jibei power grid bears features like multiple regional wind power installations and high rate of external power receiving, etc., and it urgently needs to develop a secured and economic power scheduling system with comprehensive consideration of various constraints. Aiming at features of Jibei power grid, this paper gives an overall design scheme of the day-ahead power scheduling system. The application indicates that this system can efficiently optimize generation schedule and power flow distribution, intensify the decision ability and intelligence level of power dispatch.

This paper presents a finite element investigation into the copper losses and rotor eddy current losses in brushless DC motors used in a flywheel energy storage system. The copper and rotor losses generate heat which needs to be dissipated in order to not exceed a defined temperature level for the magnet or winding insulation to avoid demagnetization or damage, which if it occurs will reduce the motor performance. The principle of operation and losses calculations are presented in the paper. The influences on the copper and eddy current losses are analyzed in detail, including the operation mode, the control strategy and the variation of the speed. Simulation and experimental results are presented and discussed.

Based on security constraint economic dispatch module, and with wind power prior utilization as target, the day-ahead optimum dispatching model of wind-thermal power is constructed to improve the acceptance ability of intermittent new energy generation. The practical application in Jibei power grid indicates that this model can meet the compiling requirements of day-ahead generation schedule, realizes the prior acceptance of wind power and contributes to the energy saving and emissions reduction in power field under the power grid security constraint.

In view of the contradiction between real-time image acquisition and energy restriction in capsule endoscopy design at present, a video capsule endoscopy system based on sleep mode was designed in compromised method. Hardware and software parts inside the system were designed and studied to realize segmented real-time function of the video capsule endoscopy in the way of dormancy and power outages. So the work time of the video capsule endoscopy would be extended. A prototype was developed which total size was just Φ12mmx25mm, so that it was easy to be swallowed. In the vitro test, the video capsule endoscopy system could work over 9h in one second dormancy mode. The video capsule endoscopy prototype could interval real-time acquire the pig intestine internal image clearly in pig intestine experiment instead of human intestine. Tests and experiments show that these scheme and designs were feasible.

An new intelligent displacement back analysis, named as CACA-SVM, was proposed based on support vector machine (SVM) and Continuous Ant Colony Algorithm (CACA). On the one hand, CACA-SVM used SVM to build the nonlinear mapping relationship between them. On the other hand, CACA-SVM used the global optimization performance of CACA to search the optimal rock mechanics parameters in the global space. The nonlinear mapping relationship built by SVM can fit and forecast the measuring point displacements under different parameters with high accuracy, avoiding the complex numerical calculation. CACA can prevent object function from trapping in local optimum and improve precision of back analysis. Case study shows that the forecasting trend was in good agreement with the measured trend, which indicated that the model was suitable for solving the geotechnical engineering problem of nonlinearity and uncertainty and could well be applied to displacement back analysis.

A new method of displacement back analysis, named SVM-CTS, was proposed based on support vector machine (SVM) and continuous tabu search (CTS). On the one hand, SVM-CTS used SVM to build the nonlinear mapping relationship between the measuring point displacements and rock and soil mechanics parameters of positive analysis based on the study samples. On the other hand, SVM-CTS used the global optimization performance of CTS to catch the optimal rock and soil mechanics parameters in the global space. The nonlinear mapping relationship built by SVM can fit and forecast the measuring point displacements under different parameters with high accuracy. CTS can prevent object function from trapping in local optimum and improve precision of back analysis. Case study shows that SVM-CTS can be well applied to the displacement back analysis in geotechnical engineering.

The Research of fire occurrence and the law of development, and the prediction of the risk are the key to prevent and extinguish the fire effectively. This paper uses FDS to build the building model and track the production and movement of fire and smoke, combined with the material properties of furniture, walls, floors and ceiling to calculate the growth and spread of fire. Finally, write the data analysis platform FireSim to read and analyze the output data of FDS, and give the fire danger rating, so as to help people prevent fire and reduce disaster.

Wind/PV hybrid generation technology is one of the hottest researching spots in the application areas of new or clean sources of energy. Designing a new small portable wind/ PV hybrid controller can effectively make use of wind power and solar energy to those whose are in the outdoor to work or tour . In this paper, 89C51 microcontroller as the intelligent control core was used to manage and control the wind/ PV hybrid system and accomplish the battery charging through a timer producing a high-frequency PWM. Meanwhile it used the Multisim software to simulate the 60W wind/PV hybrid system. The experimental data proved that the parameters of the hardware system were correct and the whole power system was secure and reliable.

The humidity control composite paperboard with excellent humidity control performance was prepared, comprising sodium chloride, anhydrous potassium carbonate, diatomite, pyrrolidone carboxylic acid-Na, carboxymethyl cellulose and self-made humidity control material. The moisture absorption and desorption rate of the sample are about 0.6231 (g/7h•g-1) and 0.5852 (g/7h•g-1), respectively. The equilibrium humidity fluctuates from 52% to 56% and moisture capacity is 31 %. Moreover, it can reach to the equilibrium levels within 60 minutes. Above all, it shows outstanding humidity control properties, meeting the requirement of micro-environment particularly for something sensitive to humidity such as cultural relic.

This paper looks at the application of Singular Value Decomposition (SVD) to color image compression. Based on the basic principle and characteristics of SVD, combined with the image of the matrix structure. A block SVD-based image compression scheme is demonstrated and the usage feasibility of Block SVD-based image compression is proved.

The accurate analysis of the length of the interfacial transition zone (ITZ) between aggregates and the hardened bulk cement paste is of great importance to the definition of the effective diffusion field in concrete. A new method for measuring the length of ITZ on concrete section by digital image processing technique is proposed in this paper. Compared with the traditional method, the ITZ on concrete section can be discriminated and the length of ITZ can be measured by the method presented rapidly and accurately, and the method can be used in various section forms of concrete specimens.

In this paper, a method for convolutive blind separation for communication sources is introduced. The method works in time-domain, and it is based on the recently very successful algorithm EFICA for Independent Component Analysis, which is an enhanced version of more famous FastICA. In addition, an automatic method of wavelet de-noising processing is proposed, using the 'mini-maxi' soft-threshold model, wavelet decomposition is performed at level 5 for the noisy separated communication signal, it can improve the performance of BSS system, and this is confirmed in the experiment for communication signals with same carrier frequencies and modulation.

Optical dot gain is the key point of halftone reconstruction study, and has always been a meaningful topic of theoretical study. The Yule–Nielsen formula is by far the most widely used research method of optical dot gain. However, solving the Yule–Nielsen parameter n remains a difficult problem. This paper disregards solving for the Yule–Nielsen parameter n, analyzes the light scattering and osmotic effect of halftone presswork, deduces the exact expressions of blank area of presswork, and determines the reflectivity of the dot part and halftone presswork according to the point spread function and probability method. Furthermore, this paper analyzes how the optical dot gain depends on the dot area coverage of presswork, ink layer transmittivity, and paper-based spectral reflectivity. In addition, a new algorithm model for optical dot gain is established. By employing the Clapper–Yule Model to calculate the spectral transmittance of printing ink and comparing it with the practical measured spectral reflectivity of the halftone presswork proof, the accuracy of the model established in this paper is fully verified.

Roller-mark is a common problem in offset printing and its solution method is important for printing. A new detecting method of texture analysis was given in this paper. In this study, printing image was acquired with high-speed CCD. Compared the difference between printing image and standard image, a defective image was obtained. Then the reason of roller-marks was given by the texture recognition of defect image. Finally, experiments were taken to prove the feasibility and effectiveness of this new method for the roller-marks diagnosis in the offset printing machine.

With the putting forward and continuous expansion of the IEC 61970, the data interaction among heterogeneous system becomes possible, and continues to be put into practical application. In this paper, Firstly, CIM (common information model) was introduced, and the CIM/XML format was used to describe SCADA data. Secondly, SCADA data were analyzed and stored in database through the program. Finally, the specific application of analyzing SCADA data is described through the application in area of voltage Sag.

In this paper, the Fe3O4 magnetic nanometer particle was prepared by co-precipitation method. At the same time, the samples were characterized by X-ray diffraction (XRD) and transmission electron microscopy (TEM). The results show that the surface active agent (PEG4000) can be good for the dispersion performance of Fe3O4 magnetic nanometer particle; and the temperature of 80°C is the appropriate drying temperature to prepare the Fe3O4 magnetic nanometer particle.

Escherichia coli and Bacillus subtilis as objects of the study, ultrasonic fragmentation acted on the bacterial cells in different growth stages, results showed that, it’s similar to the crushing effect of ultrasound on E. coli and B. subtilis cells of different growth stages, the highest crushing rate in the logarithmic phase, reached to 95.8% and 94.3% respectively, the crushing rate of adjustment phase is lowest, maintained at around 60%, the crushing rate stability cell was centered, which can be achieved 90%. The structure of the bacterial cell wall didn’t the main factor to decide the ultrasonic fragmentation effect, but different growth periods of bacterial cells did the determinant.

Perforating parameters, such as charge density, charge quantity and shooting density, are the important factors that affect the strength security of perforation string. Finding out the relationship between this two and understanding the regularity has the guiding significance to avoid the perforating accidents. Based on the research about the strength security of perforation string at the moment of perforating, taking a perforated completion gas well as an example, by changing the perforating parameters and conducting the contrastive analysis and research, then gets the regularity understanding about the influence of the perforating parameters on the strength security of perforation string:When the charge density is more than 1.9g/m3, the amplification of peak pressure will slow down ,and the influence of charge density will decrease; When the charge quantity is more than 40 gram, the amplification of the peak pressure on the packer and the peak stress of tubing will slow down ,and the influence of charge quantity will decrease; When the shooting density is more than 20 hole/m, the amplification of peak will slow down, and the influence of shooting density will decrease.

A new system on demodulation of distributed fiber Bragg grating (FBG) sensor is built which is based on Whispering Gallery Modes Optical Microcavities. In order to eliminate the temperature effect on strian measurement two adjacent FBGs (one for sensing, the other for reference) with similar central wavelength and different lengths as a probe by parallel connection are utilized. Studies have shown that the Whispering Gallery Mode Optical Microcavities with special properties of selecting specific light, when the light couple into the cavity and shocking back and forth, only the specific light can couple out, it can be expressed as: 2πrn = kλ, where r is the cavity radius, n is the refractive index of the cavity, λ is the wavelength of the light coupled out, k is taken a positive integer. Using the fature of Whispering Gallery Modes Optical Microcavities to demodulate the spectral signal of the sensing probe, Combined with the light detector, signal amplifiers, computers and other devices to dispaly the detected strain in real time. Experiment result shows that it is feasible to demodulate action spectrum and the cross of FBG for temperature and the strain is solved. It is testified that the initial establishment of the laboratory system is stable, reliable, and less expensive.

The gangue in parts of underground coal mines in China is not to be hoisted to ground for direct accumulation but replace the coal resource in larger residual coal pillars. In order to solve the supporting problem of roadways in the isolated coal pillar and tectonic region, we firstly research the relationship between the supporting effect and fold or isolated coal pillar factor. Based on the analyzing results, the double truss cable support system (DTCSS) is proposed, and then the corresponding support structure and superiority are studied. Finally, a typical complex coal roadway affected by factors of synclinal axes, isolated coal pillar and intersection with another roadway was experimented using DTCSS, and the monitoring results of the roadway displacement showed that both of the largest roof subsidence and the convergence of both sides were no more than 170mm, which ensured the roadway safety and proved the efficiency of the DTCSS.

Various failures in electronic systems, particularly in the connections between the printed circuit board (PCB) and components, are due to mechanical shock and vibration. The vibration characteristic of a plug-in PCB in an airborne electronic case (AEC) was studied first by finite element modeling (FEM) and experimental techniques. The coupling method and torsional spring elements were used in FEM to better simulate the PCB’s realistic boundary condition. A reasonable correlation between simulation and test results was obtained. Since the fundamental frequency is one of the most important dynamic characteristics of PCB, the orthogonal design and variance analysis, as well as FEM method, were discussed subsequently to investigate the effects of different factors. Analysis results demonstrate a good correlation with current studies. Finally, a general design guideline was presented to maximize the PCB’s fundamental frequency.

A novel demodulation method for Fiber Bragg Grating (FBG) sensor based on matching grating demodulation is proposed. It is means using several fiber gratings to cascade, and programming to make the computer automatically select different wavelengths. So that it can expand demodulation range based on high sensitivity. The photoelectric detector (PD) makes the reflected light intensity which form FBG change into voltage. And the voltage is amplified to 0~5v by amplifying circuit. Then through the data collection box, voltage sent to computer for data acquiring. Real-time analysis data and display the variable of center wavelength for sensing FBG. Because the same type of sensing FBG and demodulation FBG, they have the same temperature drift, so it can control the influence of environmental temperature. Therefore, this system can successfully solve the temperature/strain cross-sensitivity issue. The experimental results show that it is feasible to demodulate wavelength using the cascaded FBG. And the experimental measuring wavelength error is less than 0.009 nm, the measuring micro-strain error is less than 7.5με.

The coal roadways with water spraying usually have large surrounding rock deformation or roof abscission layer, especially to the roadways with compound rock strata roof, which could lead to sudden roof caving accidents, so it is imperative to research the roof characters and the corresponding controlling methods. In this paper, we firstly analyze the main reasons and characters of the roof deformation or its stability failure with bolt and cable supporting, and then the mechanical properties of the roof are tested in the lab, which could afford detailed datum to the further analysis. Based on the comprehensive researching results of this complex roof, a set of measuring device for the value of water spraying in single roof hole is developed and then applied to a typical coal roadway. Finally, some effective controlling methods are put forward to prevent from the large deformation of the roadways.

The Wudongde reservoir area 3D visualization geological disaster information system is designed in this paper, based on the superiority of Skyline software and Skyline TerraExplorer API. It consists of two parts: retrieval browsing system and spatial analysis system. Retrieval browsing system has several functions, such as displaying, browsing, information retrieval, data statistics, querying, searching and printing. Spatial analysis system sets the core modules, including spatial calculation, terrain analysis and flood-inundated simulation. It is verified by application that this system can be used for displaying 3D scene of the Wudongde reservoir area terrain, providing decision support for the governor, reaching the design requirements wholly.

Two different types, one is the OSB panel perpendicular to the cold-formed thin steel and another the OSB panel parallel to the cold-formed thin steel, of self-tapping screw joints of cold-formed steel frame shear walls are tested under the monotonic loading. The load-displacement curves of the test specimens are obtained and the ultimate loads Fu and the corresponding displacements δu of two different types are analyzed. Fianlly, the conclusion that the influence from the direction between OSB and cold-formed thin steel to the performance of tapping screw joints is not significant is pointed up.

Evaluation of slope stability is a complex system problem of uncertainty. A new model for slope stability evaluation was established based on the Attribute Recognition Model (ARM) and the Projection Pursuit (PP) optimized by the Particle Swarm Optimization (PSO), which was named as Attribute Recognition Model based on Projection Pursuit Weight (ARM-PP). The attribute measurement of single index was computed through constructing the attribute measurement functions, and the synthetic attribute measurement was calculated by the weight of PP optimized by PSO. Confidence criterion was used to recognize the slope stability. The attribute mathematical theory could successfully resolve the comprehensive evaluation problem with a number of fuzzy attribute. Furthermore, ARM-PP adopted the PP to determine weight, avoiding the subjectivity and randomicity, and ensuring objectivity and accuracy of the evaluation. Case study showed that ARM-PP was feasible and precise in slope stability evaluation.

Carbon-Carbon composite materials are widely used as the surface thermal protection systems (TPS) of advanced high-speed air-craft and spacecraft. The thin-walled structures with this kind of materials would exhibit large displacement response under high-level acoustic loads and possibly display buckling at elevated temperatures. Reliable experimental data are difficult to acquire because of the high costs and difficulties with instrumentation at high acoustic intensity and elevated temperatures. Thus, in the design process greater emphasis will likely be placed on improved mathematical and computational prediction methods. Among these researches, the simulation methods for nonlinear response of thin-walled composite panels under thermo-acoustic loadings are being developed emphatically .This paper presents a nonlinear finite element model for analyzing nonlinear random dynamic behaviors of Carbon-Carbon composite panels under the combined effects of thermal and random acoustic loads. The acoustic excitation is assumed to be a band-limited Gaussian random noise and uniformly distributed over the structural surface and the thermal load is assumed to be a steady-state with different predefined temperature distribution. Three types of motion: 1) linear random vibration about one of the two buckled positions, 2) snap-through motion between the two buckled positions, and 3) nonlinear random vibration over the two thermally buckled positions can be predicted. And the dynamic response behaviors of the structures are discussed. Based on this, the influences of sound pressure level (SPL) and elevated temperatures on the dynamic responses are analyzed emphatically.

Thin-walled structures of future hypersonic flight vehicles will encounter complex loadings and exhibit obvious nonlinear responses. The thermal loads from high speed flow or engine jet flow can cause thermal buckling of thin-walled structures, such as Thermal Protection System (TPS). If the structures are loaded with intense acoustic loads simultaneously, large deflection nonlinear response, including snap-through, can be induced. Snap-through will give rise to large amplitude stress cycles and non-zero mean stress, which can lessen the fatigue life markedly. Starting from Hooker’s Law with thermal components, the large deflection governing equations of motion for simply-supported plate under thermo-acoustic loadings are derived. The partial differential equation (PDE) of motion which is difficult to solve is then transformed with Galerkin’s method to the system of ordinary differential equations (ODE) under modal coordinates. The displacement responses under different combinations of temperature increments and sound pressure levels are calculated by employing Runge-Kutta method. Typical thermo-acoustic responses are predicted: 1) random vibration around pre-buckled equilibrium position, 2) persistent snap-through between post-buckled positions, 3) intermittent snap-through, 4) vibration around one of the two post-buckled positions. By dividing the restoring force term in the equation into linear term and nonlinear one, the evolutions of each term are obtained to illustrate the mechanism of thermo-acoustic response and the contributions of each force, including shear force, thermal force and membrane force. Thus a further insight into thermo-acoustic response has been achieved.

This paper relies on Chongqing City Transit Line 6 which is from Wulidian Station to Shanyanggou Reservoir Station nodal project, focusing on the monitoring and comparative analysis of ground sedimentation of the nearby housing estate, bridge abutment as well as the flat surface of the test section (mileage K17+300~K17+600), otherwise, monitoring and comparatively analyzing the deformation of the supporting structure inside the tunnel. This is the first application of TBM in the urban mass transit and the research achievement will accumulate valuable experience and data for the application of TBM in the urban mass transit.

The research on Communication based on Ad hoc networks between vehicles is highly concerned about in many countries. However, Vehicular Ad hoc Networks (VANETs) is in the environment in which traditional methods have certain limitations. In this paper, vehicular network scenarios and the probability of penetration model are given. Through adding obstacles and the probability of penetration model to NS2, GPSR performs better in the new simulation scenarios.

To expand user's actions of personalized recommendation, this paper introduces an Interest Feature Spatial based Recommendation Model. This model combines both collection behavior data of network users and content data of web pages located by URL address. The main content includes: (1) Proposing the construction of interest feature spatial based on SHG-Tree; (2) Proposing the formula to calculate interest feature values of network resources; (3) Proposing four interest match algorithms along with six types of personalized recommendation schemes. Experiments show that the recommendation service can achieve millisecond responding, the precision, especially recall metric is better than item-based collaborative filtering algorithm.

Yunji township of Jiangyou city is the particular characters of drought, poverty. The party committee and government try to find a getting wealth road with industry development goal "thousands acres of walnuts". The main contributions of this paper are: 1) Proposing improved PCA model to eliminate dimensional inconsistency and the difference of magnitude. 2) Adopting improved PCA model to analysis five fine walnut characters, and comparison with traditional PCA. 3) Getting the conclusion that Xiangling walnut is the most suitable for Yunji township cultivate.