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As a high-quality non-polluting energy source, coalbed methane is widely used in power generation, automobile fuel and other fields. Moreover, the concentration of coalbed methane can be effectively reduced by exploiting and utilizing coalbed methane so as to eliminate the gas accidents fundamentally. In the coal mining area, the exploiting of coalbed methane resources are closely related to the hydrogeological conditions. This paper discusses the controlling effect of hydrogeological conditions on coalbed methane exploitation mainly from chemical characteristics, the hydraulic connection between aquifers, groundwater recharge, runoff and discharge characteristics and so on. The results showed that the water-bearing zones were recharged by precipitation. The isotopic characteristics of the coalbed water, the taiyuan limestone aquifer, the ordovician limestone aquifer showed that the groundwater were ancient which are formed earlier and the coalbed water expressed a definite drift feature of D. There had a weak hydraulic interaction between different aquifers. Mg2+, Cl-, HCO3-, TDS are the monitoring index of drainage production water. If the hydrogeological problems are frequently occurred When mining, it is necessary to analyze the hydrogeological conditions objectively and study the relationship between them to make the coalbed methane scientifically exploitation to improve efficiency and quality of coalbed methane.

At present, the performance evaluation of thermal spraying coating mainly depends on experimental test and numerical calculation, but due to the limitation of error and algorithm, neither of the two algorithms can effectively satisfy the effective evaluation of thermal spraying performance. In this paper, taking WC/Co coating as an example, a new method for calculating the performance parameters of thermal spraying coatings is proposed, that is, the finite element model and the analysis model of coating parameters are established for the microstructure of the coatings under different magnification, respectively. By calculating the basic performance parameters of the coatings, the macro performance parameters of the thermal spraying coatings are obtained, so that the performance of the coatings can be evaluated.

The AZO films deposited on quartz glass by magnetron sputtering with different deposition time various from 30min to 120min.All of the obtained samples had a (002) diffraction peak range from 34.31 to 34.52°, while the mean grain size increased from 30.1nm (30min) to 56.1nm (120min) respectively. The XPS survey indicated the photoelectron peaks of Zn ,O and C elements occured. The optimal transmittance of the films reduced obviously from about 92% to 78% near 550nm with deposition time increased from 30min to 120min. And the average transmittance of AZO films prepared at 30, 60 and 90min was about 85% in the visible light region.

ZnO:Al thin films were deposited on flexible substrates by magnetron sputtering. The effects of the carrier concentrations on the hall mobilities of AZO films were investigated. When the carrier concentration was high (~1020/cm3), the hall mobility decreased with increase of the carrier concentration, showing obvious characteristics of ionized impurity scattering; moreover, the carrier mobility could be expressed to be-2.14/3 proportional of the carrier concentration by combining the results of simulation and experiments.simulation and experiment. When the carrier concentration was about a magnitude of 1019 cm-3, the carrier mobility is influenced by the carrier concentration and grain size, which means the carrier mobility was affected by both the grain boundary scattering and ionized purity scattering mechanism.

Zirconyldichloride modified polycarbosilazane (PZrSZO) has been synthesized from two-component dichlorosilanes (methyldichlorosilane and methylvinyldichlorosilane), zirconyldichloride, and ethylenediamine using triethylamine as acid-absorbing agent and tetrahydrofuran as solvent. 1H nuclear magnetic resonance analysis of the as-synthesized PZrSZO suggest a structure of ethylene-bridged polycarbosilazane having –Si–N–C–C–N– as backbone chain with –CH=CH2, –H and –CH3 attached to Si as side groups, which is similar to that of non-modified PSZO precursor. Fourier transform infrared spectroscopy shows Zr–N stretching vibration peak appears at 532 cm-1 suggesting the incorporation of Zr into PSZO through aminolysis reaction between zirconyldichloride and ethylendiamine. SiZrCNO ceramic with the ceramic yield of 63 wt% is obtained through subsequent pyrolysis treatment at 1000 °C for 1 h under argon flow. EDS analysis shows its composition of SiZr0.01C1.03N0.25O0.84 with the Zr percentage of 1.45 wt%. X-ray diffraction analysis shows SiZrCNO ceramics are of mixed amorphous silicon carbonitride oxygen phase embraced with SiO2 nanocrystalline.

Numerical simulation method was developed to investigate the performance of plasma and multi-physical fields in direct current (DC) arc plasma reactor for chemical vapor deposition (CVD) Diamond film,in order to obtain more information on the process of CVD. Finite Volume Method (FVM) was adopted. Continuous arc forming and the dynamic formation process of rotating arc plasma were shown in this paper. Multi-physics field in deposition chamber were modeled including flow field, temperature field. Distribution of velocity and temperature were obtained by solving momentum and energy equation with SIMPLE separation algorithm. Simulation results show that, plasma temperature near the cathode tip is the highest, which is more than 1×104K. The plasma distribution shape like the bell jar. The changing regularity of outlet velocity, temperature and static pressure with the distance from the anode center were revealed. The effectiveness of plasma temperature and gas flow calculated was confirmed by the experimental results. The research results provide the theoretical foundation for obtaining uniform diamond thick film.

The ZnO:Al (AZO) films were deposited on glass substrates with Al2O3 buffer layers by RF magnetron sputtering. The obtained films had the hexagonal structure and preferred orientation of (002). Compared with AZO film without buffer layer, the grain size of the film with buffer layer was increased and the conductive property was increased greatly. the grain size of AZO films reached 27.9nm for those with buffer layers. The optical property of AZO films was decreased by the buffer layers. The resistivity of AZO films with Al2O3 buffer layer was about 6.6×10-3 Ω·cm and the average transmittance was over 80% in the range of 450~900nm.

The differences of growth and root absorption of three apple rootstock seedlings was compared and the absorption of hydrogen ions and endogenous hormone levels under the replant stress was discussed in this study. Experimental results showed that the dry matter ofM. sieversiiseedlings was significantly decreased under replant stress and the root-shoot ratio was increased. Root biomass of three rootstocks increased observably and the total root length was extended by 1.45 times, 2.22 times, 1.71 times, respectively compared to control. Root activity of three rootstocks all decreased, which one ofM. hupehensisfell less than another two rootstocks. The flux direction of H+had no change forM.HupehensisandM.Hupehensis, which ofM.prunifoliachanged into outward from inward. The endogenous hormone level of three rootstocks in replant stress was affected. ABA content is higher than that of controls, IAA and ZR contents were lower than controls, GA inM. HupehensisandM. prunifoliawas higher than that of controls besidesM. Sieversii. The root amount of three rootstocks increased significantly. The dry matter accumulation, absorption of H+and endogenous hormone levels was affected and the sequence decreasingly wasM.Hupehensis,M. prunifoliaandM.Sieversiiaccording to the degree of tolerance to replant stress.

Monodisperse CoFe2O4and Co0.4Zn0.6Fe2O4hollow nanospheres were synthesized in large scale by solvothermal method in ethylene glycol solution. The structure, shape and size of the samples were investigated by Fourier Transform infrared, X-ray powder diffraction and scanning electron microscopy. The results indicate that the products are spherical with an average diameter less than 200 nm. Magnetic studies revealed that the saturation magnetization of Co0.4Zn0.6Fe2O4is 78.6 emu/g, higher than the CoFe2O4, which is 69 emu/g, while the coercivity of the Co0.4Zn0.6Fe2O4is 184 Oe , obviously lower than that of CoFe2O4which is 832 Oe. The electromagnetic parameters were measured at 2-18 GHz using HP8722ES vector network analyzer and then the microwave absorption properties were calculated through the transmission line theory. As to the Co0.4Zn0.6Fe2O4, the absorption bandwidth with reflection loss below-10 dB is up to 3GHz, from 10GHz to 13GHz with a thickness of 2 mm. A maximum reflection loss-45.6 dB was found at 12.9 GHz for the CoFe2O4with a thickness of 1.8 mm. As a result, the as-prepared hollow nanospheres show good prospects of being applied in EM wave absorption materials.

This paper mainly introduces the variable cross-section rotary dynamic seal, sealing mechanism, research and development, listing examples of variable cross-section rotary dynamic seal applied in the petroleum machinery. Due to its simple structure, reliable sealing performance, it is widely applied to the occasions such as high pressure, in suffering much, shock vibration.

The experiment of cutting mechanical properties of single crystal silicon surface in the micro-nanoscale is researched using nanoindenter and atomic force microscopy. The result of the experiment shows that: in the constant load, the impact of different scratching velocity for single crystal silicon surface scratch groove width and chip accumulation volume are not big; but the cutting force and friction coefficient are not increases with the scratching velocity increases; when the scratching speed is certain, the size of load has a greater impact on the cutting mechanical properties of single crystal silicon surface, with the increase of the load, the cutting force increases, but the cutting force is not linearly growth.

A novel greedy algorithm for blind CS recovery without prior knowledge of sparsity, called the Bisection Subspace Pursuit (BiSP) is introduced. The most outstanding feature of the BiSP is that it adopts the bisection method to adaptively estimate the sparsity of target signal, which means that no prior knowledge of sparsity is needed. Simulation results demonstrate that the BiSP not only retains comparable recovery accuracy with CoSaMP, SP and SAMP, but also outperforms the SAMP in terms of complexity when sparsity of signal is large. This makes the BiSP a competitive candidate for many practical situations.

Because of some intrinsic properties of the PZT actuator, such as hysteresis, creep and nonlinearity effect, it’s difficult to achieve satisfactory results and control precision for conventional PID controller. In order to improve the control precision of the PZT driven of micro positioning platform, we proposed a CMAC neural network based on PID control scheme, which has the characteristics of realizing feed-forward control and obtaining the inverse dynamic model of controlled object by the CMAC neural network controller, and realizing feedback control by conventional controller, which can ensure the system stability and suppress disturbance. Form MATLAB simulation results, it demonstrates that the CMAC+PID control algorithm can be able to improve the control precision and response time of the system, and enhance the anti-interference ability and robustness, comparing with the traditional digit PID control algorithms.

Network technology accelerates the development of educational information, campus portal building is considered as an important part of it in every university, almost all information of teaching and research appeared on the web. Meanwhile, the utilization rate of some websites was lower in university, information was updated slowly, information classifications were complex and not standardized on a platform. They didn’t emphasis on using and sharing but building and developing, and this phenomenon was widespread. So the paper proposed a decision tree model for score sorting information based on C5.0 algorithm, setting up a statistical model for data mining by adding a line weight value for portal information. Finally, the results verify the correctness and science of the model by giving an example.

Atomic Force Microscope (AFM) works by the force between the probe tip and specimen surface. The nanocontact force between the probe tip and specimen surface has an important influence on the detection surface. Base on the analysis of the working principle of the AFM and nanocontact force calculation model, according to Hamaker assumptions, using continuum method established the theoretical contact force model of the AFM tip. the contact force calculation methods of contact pressure in process has been obtained. The variation of the force between the probe tip and specimen surface has been found by calculation model and programming calculation of Matlab. Provide the basis for improving the accuracy of an atomic force microscope surface inspection and error analysis

Camera calibration is the most important stage of machine vision measurement. The principle and method of camera calibration for binocular stereo vision system are introduced and the left and right CCD are respectively calibrated by using the prepared calibration target and the MATLAB program. Then internal and external camera parameters are obtained by the calibration experiments. The experimental results show that the calibration results have high precision.

Using the method of fuzzy comprehensive evaluation to Wanlv Lake in Guangdong Province as an example for empirical study, Wanlv Lake ecological tourism destination competitiveness is the main cause of strong destination level of natural resources, tourism resources heterogeneity is higher.Based on this conclusion, we put forward Wanlv Lake ecological tourism destination of competitiveness as the main countermeasure of sustainable ecological environment protection and effective management.

Steroid microbial conversion system is a complex but controllable system with multiple factors involved. In the process of steroid microbial conversion, strain screening and selection is essential to improving productivity and reducing costs. However, good-quality strains need optimal environmental conditions to best play their roles. Therefore, environmental conditions can significantly affect the conversion rate in addition to the quality of the strains utilized. Microbial environment includes physiological and biochemical environment, physical and materialized environment and hydro-mechanical environment. For example, the composition, pH value and dissolved oxygen of culture medium affect the physiological and biochemical environment; gas-liquid interface and liquid-solid interface of culture media affect the physical and materialized environment; scattered and mixed conditions of culture system affect the hydro-mechanical environment. Representative physical factors and their applications in steroid microbial conversion system are briefly reviewed herein.

The feed drive system is important functional components which effects on precision and efficiency of transmission and cost of CNC milling machine tools. So the designe of the feed drive system of economical CNC milling machine tool is researched. Firtsly the general design scheme which includes the transmission scheme and basic parameters of CNC milling machine tool is determined. Then according to the milling force calculated during mill processing, linear rolling guide, ball screw and stepping motor of X axis and Y axis of feed drive system are respectively calculated, selected and checked in detail. Using the Solid works software for 3D modeling and assembly of mechanical parts of feed drive system, By the scheme comparison, selecting the CNC system of Huazhong century star HNC-21 and accomplishing the electrical connection of CNC system.The feed drive system of economical CNC milling machine in the desing is high performance and low cost,and meet accuracy requirement.

The surface properties and performance of activated carbon (AC) used for catalytic ozonation were investigated after nitric acid modification (N-AC) and Cu (II)-loaded (N-Cu-AC). The results showed that the nitric acid modification could increase the amount of surface functional groups of AC. As a result, the adsorption capacity and catalytic activity of AC could be improved. The surface functional groups and Cu (II)-loaded of N-Cu-AC showed a synergistic effect on catalytic ozonation, where the catalytic activity of Cu (II)-loaded was more stable. N-Cu-AC was an effective and reusable catalyst for catalytic ozonation. The highest TOC removal efficiency of 58.0% could be achieved when N-Cu-AC was used for 60 min-catalytic ozonation treatment of acid red 3R.

According to the status and development requirements of education information of colleges in China, for the characteristics of higher education, the paper proposes a educational administration cloud service based on SaaS and SOA to provide education and teaching service for colleges. The paper mainly observes and researches key techniques such as educational administration management solutions for characteristics of higher education, design and assembly of educational service based on SOA, and selecting proper SaaS multi-tenant mode to implement informationization on colleges with weak informational basis in China. The idea and thought of moving application of education information to cloud client is the new development direction of educational informationization.

Rolling element bearing is crucial for operation safety of modern mechanical equipment. Its poor damping and heavy load capacity usually makes it degrade faster than the shafts and the gear sets. In this paper, a recently proposed time-frequency (TF) representation tool, named the complete ensemble empirical mode decomposition with adaptive noise (CEEMDAN), is introduced for the TF representation of helicopter bearing degradation data. Totally three sets of sequentially collected accelerometer data were included for the comparison study, with the first two data sets showing no signs of degradation and the third data set corresponds to totally scored bearing rollers. Facilitated by CEEMDAN method, no clear distinction can be observed on the TF plane as for the strong background noises. Thus we previously highlight the bearing signatures using spectral kurtosis (SK), a forth order statistics which is sensitive for impulsive components. Its fast algorithm, called the kurtogram, implements the detection of considerably weak bearing components and suppresses other background components, e.g., gear mesh components. With the preprocessing by kurtogram, the feature information on the TF plane can be easily characterized for the third data set.

As a new environmental-protection technology, large-scale ammonia-based Flue Gas Desulfurization (FGD) requires high control and process technology. The process of FGD almost includes all the operation units in chemical industry. In order to make the equipment adapt to some complex changes of original flue gas and operate on better work conditions like low energy consumption, optimum liquid/gas ratio, minimum water consumption, completely nitrites oxidization, the multivariable predictive control and soft sensor based on mechanism model are studied in this paper. And the results show that these problems of variables correlation, large delay and variables coupling of FGD are resolved. In addition, ammonia consumption is lower, by-products quality is improved, Besides, the process operation is more smooth and safe, so the equipment can run effectively and economically after carrying on advanced process control.

In this paper, intelligent fuzzy control theory is introduced in the model of neural network algorithm, and the neural network system is improved by the PID controller, which has realized the feedback and adjustment function of neural network system, and has made the reaction of the system be more accurate and stable. In order to verify the validity and reliability of the designed intelligent control PID algorithm based on the fuzzy neural network in this paper, the algorithm is carried on the programming by using Matlab programming software, and the control process of PID is calculated by NNbox simulation toolbox, at last, it has obtained the curve of PID control response changing over time. From the response curve, it can be seen that after the PID proportional coefficient is regulated by using fuzzy neural network intelligent control algorithm, it can quickly and steadily obtain the control curve, which has realized better intelligent control effect, and has provided technical reference for the research of intelligent PID controller.

This paper has analyzed earthquake with different design life and 50 years with the same design basis of probability guarantee, proposed seismic design life under different reference values recommended.

The paper studied on the inversion surface parameters of remote-sensing information serving for vegetation surface. First, presented the inversion of surface temperature based on four parts: calculation of brightness temperatureyntax of L-systems, calculation of atmospheric transmissivity, calculation of surface emissivity, and D. Precision evaluation on inversion result. Secondly, calculating the atmospheric transmissivity .

With the growing demand of dry bulk in China, sea-rail intermodal transport gets more attention. In order to define the key factors of sea-rail intermodal transport of dry bulk , system dynamic and modeling software VENSIM were used to establish system dynamic model of sea-rail intermodal transport of dry bulk, and the case of sea-rail intermodal transport of dry bulk of Meizhou Bay Port in Fujian was used to simulate and check the model, the result shows that the model is feasible and effective. Finally, the key factors in the model were sensitively analyzed , and suggestions of promoting the development of sea-rail intermodal transport in Meizhou Bay port were made.

There are many kinds of mobile power supply, in this paper, aiming at the existing mobile power cannot be automatically continued charging problem, an automatic charging and discharging circuit design, and put forward the improvement circuit corresponding to the common lithium battery over-voltage and over-current protection, battery monitoring problem. The widespread use of application of STC15W401AS, SX2105, DS2762 chip as the core device, with the corresponding peripheral circuit, provides a reference for the application of charge power supply protection circuit of lithium ion batteries based on SCM system.

To improve the reliability, real-time performance and maintainability of navigation system, an optical-mechanical-electrical integrative design method of the fiber optic gyro inertial navigation /beidou/odometer integrated navigation system is proposed. Based on the basic working principle of the integrated navigation system, design of system structure and signal connection are implemented. In the integrated navigation system, all-fixed-structure, instrument and system integrative design and modularization design are used. At last, the integrated navigation system is developed, north seeking test and vehicle test are carried out to demonstrate the validity of the referred system design.

Considering in the progress of the power quality detection for disturbance signal, detected signals are often has the problem of random noise and impulse noise, in this paper, by using traditional wavelet de-noising, put forward a detection method of disturbance signal based on mathematical morphology and lifting wavelet, discussed its detection principle and implementation methods. Simulation results show that the method de-noising effect is obvious, can effectively improve the accuracy of the disturbance signal judgment.

Taking a certain dolphin structure of the ship lock in Jiangsu as an example, the finite analysis software ABAQUS was used to establish the 3D finite element model of ship, dolphin and foundation, and the process of collision was simulated for the transient dynamic analysis, obtained the collision force-time curve and the stress and strain of the dolphin, calculated ship collision force and compared with the norms used both in China and other countries. The results show that the maximum compressive stress is on the contact surface, the tensile stress is both on dolphin floor and back surface of the dolphin, and the maximum tensile stress is on the front teeth of dolphin floor; the ship collision force of finite element simulation is between Chinese norms and European norms. The results provide reference for the design of future dolphins.

From the outset of eachnet.com to the later alibaba.com and the taobao.com, C2C e-commerce online shopping platform has been rapidly rose in China. For e-commerce enterprises, if it wants to obtain benefits from the C2C e-commerce platform, it must know the consumer's purchase tendency based on the e-commerce platform. This paper has used the VAR econometric model to establish the Granger non-causality model, and this model can calculate the non-causality relationship of the store credit and the consumption tendency of consumers in the C2C e-commerce online shopping platform. Through the VAR econometric calculation on reputation, sales and consumption tendency, it shows that with the increase of reputation, and sales, the total sales show a trend of growth. And then the causality test between the two shows that there is a Granger causality relationship between the two, which provides technical support for the optimization design of the online shopping platform.

On the grassland highway, the driver is prone to muscle fatigue because of the particularity of its landscape and the linear structure. And vehicle operating system leads to different degree of muscle fatigue. In order to explore the pilot fatigue characteristics in grassland under different operation conversion highway, put forward the fatigue improve measures and improving the quality of driving, I use the real driving test. In this paper, we study the manual and automatic driver’s shoulder muscle fatigue with method of frequency domain analysis through testing the driver, obtaining MF of trapezius muscle in static measurement and the surface electronical signal of the trapezius muscle after 110 minutes’ driving. We devide the drivers into 2 groups (5 drivers in manual group, 5 drivers in automatic group). The results show that the automatic driver’s MF has significantly negative correlation (P =- 0.521) before and after the static test, which suggests automatic driver will be afflicted with shoulder muscle fatigue; The manual drive’s MF before and after the test tends to decrease with time (SlopeMS =- 0.0076, SlopeMD =- 0.0582), which suggests that after test, drivers in manual group are in the right shoulder fatigue, and before test, the decline of MF shows the drivers’ fatigue accumulation. After test, MF of manual and automatic group increases (SlopeAD =- 0.01, SlopeMD =- 0.058), which shows that driving on grassland highway can lead to the driver’s muscle fatigue with the extension of time; and vehicle operating system leads to different degree of muscle fatigue.

The latest technical progress in pretreatment and analysis method of inorganic elements of electroplating sludge was briefly reviewed. Some pretreatment methods were summarized, including exposure system digestion, high-pressure tank digestion, microwave digestion and dry ash digestion as well as some analysis methods, such as spectrophotometry, atomic absorption spectrometry, inductively coupled plasma spectrometry and inductively coupled plasma mass spectrometry. Finally, the trend for future technical development in inorganic elements determination of electroplating sludge was prospected.

According to the poor tracking accuracy of periodic signals for continuous rotary electro-hydraulic servo motor, the mathematic model of the electro-hydraulic position servo system of the continuous rotary motor was established, a composite control strategy combining with proportion controller and adaptive zero phase error tracking controller was designed. The working principle of composite strategy was given, and the composite strategy was verified on Co-simulation of MATLAB and AMESim platform. The simulation result shows that the amplitude attenuation and phase delay of the tracking curve which excitated by the sinusoidal signal 0.5degree and 10Hz for continuous rotary motor is less than 1.2% and 1.08°respectively, and the efficiency of the composite controller is verified through simulation.

In order to monitor and forecast rockburst, and analyze the source and magnitude,a set of microseismic monitoring rockburst technology was developed,combining with the actual situation in Dongtan coal mine.The technique used SOS microseismic monitoring system to determine failure points,record rockburst moments,the size of epicenter,the epicenter pressure drop and vibration mechanism,infer coal and rock stress state and destruction,and evaluate and monitor rockburst danger degree in accordance with changes of microseismic activities,focal position and activities tendency. The optimization microseismic monitoring network was layoutted in monitoring areas.The seismic geophone picked up microseismic signals and recorded in the rockburst figure,and the rockburst occurrence regularity and development trend were studied based on statistical analysis results of microseismic datas.Then by using VB6.0,the rockburst monitoring results were compounded in the mining drawing with concentration analysis.The rockburst events were statistical processed partitionedly to obtained vibration frequency,maximum vibration energy and total shock energy.The rockburst can be monitored and predicted through the rockburst events reflected by the datas.

In order to improve the filtering effect of the bag filter, ultrafine sea-island fiber nonwovens is used to produce ultra-fine structure dust filter material. At the beginning, sea-island superfine fiber needle-punched nonwoven production technology is introduced. And then testament is made to tensile breaking strength, elongation at break, bursting ,air permeability, capture efficiency of dust with different diameters of 0.3μm, 0.5μm, 1μm and 3μm. At last, the performing difference of the sea-island superfine fiber ultrafiltration bag and its counterpart from the market is compared and analyzed. [1,2] The experimental results showed that the average breaking strength of Sea island superfine fiber ultrafiltration enhancement of non-woven fabric in warp direction is 1931N, its average elongation at break 32.7%, its average of Zonal breaking strength 2561N, its average elongation at break 22.6%, its bursting of average strength 1998.07N, its permeability as high as 428.62×103 m3/s, its filtering precision 82.4% under 0.3μm diameter and 100% under 3μm diameter.

The wireless video monitoring system contains the video acquisition device,video transmission device,video storage device and VGA display device.In this paper,we use video acquisition device to collect video siganals in real-time.The analog video signal is transmitted by using wireless technology.The video signal is converted to a digital signal by using the dedicated A/D chip. At the same time ,the YCrCb signals will be converted into RGB signals by the format converting module.Then,the digital RGB signals are converted to analog RGB signals through the D/A,and they are finally displayed on the VGA monitor in real-time.The design mainly uses the wireless transmission technology to transmit analog video signals and uses ADV7181 to decode.The controlling system of FPGA deals with the decoded digital signals which will be transmitted to the D/A and the data finally will display in real time.

Fair faced concrete is currently a new kind of construction manifestation fusing Oriental Zen thought of “imitation of nature”, obtaining applications in many buildings, but it will appear the phenomenon of water veneer degradation and damage without surface protection. Analyzing the basic requirements of surface protection materials for fair faced concrete, the study showed four different types of available surface permeable protection materials to carry on the contrastive research of basic properties and protection performance.

The strain measurement is a most important and absolutely necessary task on the probing into the constitution of the materials. The ways of strain measurement are theoretically divided as the mechanical type, vibrating-string type, inductive type and bonded resistance type, and the last one is widely used for its high precision and convenience. The geogrid, which has been widespread in the reinforcement structures, is more and more popular for its high strength, good toughness, corrosion resistant, anti-fatigue and effective interaction with soil. The geogrid is made of polymer, its ultimate strain can reach above 10%, and it is sensitive to the time, furthermore it usually has significant relative displacement with soil in the tests. Then some measures have to be taken to make the measuring range wider and make the all gauges achieving synchronization, measures also should be conducted to prevent the strain gauges separated from the geogrid when it has slightly bending, prevent the wires break when the gauges going forward and reduce the influences from the forward preventing measures. Some researchers have showed their techniques to avoiding part of the above problems. Based on a series of pullout tests of geogrid, this paper gives the contrast and analysis on those techniques above, and lists the relative measures that used in these tests, especially for the gauge sticking techniques and preventive measures.

This paper introduces the characteristics of yeast in the process of wastewater treatment; and introduces the application on treatment of oily sewage, monosodium glutamate wastewater, metal ion wastewater using yeast; finally, this paper analyses the kinetic models of yeasts in wastewater treatment.

For the effective prevention and control of mine bumps, or to a certain extent, to reduce the loss the losses caused by impact ground pressure accident,thin-walled components are proposed to be applied as a scaffold components in roadway supporting. Components impingement is reflected in the component crushed process ,in which the impacting energy absorption and crushing space provide certain amount of energy to free up space. The energy absorption characteristics of different configuration thin-walled components has been simulated with ABAQUS finite element, such as the conventional square,regular hexagon, round and origami square, regular hexagon etc,.and the results showed that: (1) The problem of conventional components is larger load fluctuation coefficient. Origami component is a kind of perfect impingement components ,as it can reduce peak loads and the load fluctuation coefficient effectively. (2) Under different ratios width-to-thickness, components can have different deformation modes, but the relationship of peak load and wall thickness is near linear and has nothing to do with the deformation modes. (3) The component can have a relatively lower crushing peak load and load fluctuation coefficient and relatively higher specific energy absorption,if given a suitable diamond concave angle. impingement components using combined with existing supports can make the existing supports to become top beam impingement support , mudsill impingement support ,two sides impingement support and impingement hydraumatic support and so on.

The pressure on the wagon body is generated for stochastic vibration of train or vehicle. The value and variation of this dynamic pressure are great significance in the study of the fatigue strength of the wagon body. This paper reviews the various influencing factors of the pressure distribution and also summarizes its simulation and prediction method based on the sufficiently literature reading.

Polyvinyl alcohol fiber reinforced cement-based composites are a new kind of material based on micro mechanics design. It is produced by adding polyvinyl alcohol fiber in the cement-based composites. In efforts to study the mechanical properties of polyvinyl alcohol fiber reinforced cement-based composites, some specimens were tested to examine performances. According to experimental investigation on mechanical properties, the stress-strain relationship curves and failure patterns are obtained. The test indicates that polyvinyl alcohol fiber reinforced cement-based composites have better toughness and fracture energy, and it has superior physical mechanical performance.

Mobile Ad Hoc network is a self-composing network with a highly dynamic network topology. Although it has many advantages, there are still some safety problems in it. One of these problems is the black hole attack. The black hole attack is a typical attack to the Ad Hoc network and is also the main threat facing it. In this paper, the safety problems exist in the AODV protocol, which is a kind of routing protocol in the Ad Hoc, has been analyzed in detail. In the meanwhile, an improved Secure Ad Hoc On-Demand Distance Vector Routing called OSAODV has been proposed and realized based on the NS2. Finally, three set of experiments have been made, the results have shown that the OSADOV can avoid the black hole attack very well.

The finite element method and nanoindentation experiment are used in this paper, to analysis mechanical properties of monocrystalline germanium on micro/nanoscale. The cloud charts of stress and strain distribution are obtained by finite element method. It is shown that the depth increment of the contact makes the value of stress and strain in the surface layer greater and the area of action larger in the process of nanoindentation of monocrystalline germanium. In the nanoindentation experiment, load and displacement curve is different with different crystal orientations. With the increase of load, contact depth has been increased. The residual deformation depth of three crystal orientations is also different. The results of FEM is is closed to the crystal orientation of [100].