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Regardless of fire heat or short circuit high temperature melting, the residual traces which represent the environmental characteristics can be found in copper and aluminum wires. The primary short circuited melted mark identification must be scientific and objective for physical evidence of the electricity fire during detecting, and the conclusions are related to the fire survey process. Currently, identification method of electricity fire, including macroscopic method and metallographic method, is very general and lacking of standard reference map and detailed description. According to the macro and micro characteristics and formation mechanism of various fire wire melted marks and the characteristics of metallographic organization of primary short circuited melted mark, two actual cases were analyzed in detail so as to distinguish the relationship between the melting reason and fire cause and to confirm that these two fires are caused by primary short circuit.

This paper aimed at the quality of the transparent paper package, developed a machine vision detection system and successfully applied it in production line. A variety of transparent paper defects are detected out. This system makes the transparent paper packing quality b improved and provides good reference for the application of the technology of machine vision detection.

The impact dynamics of spatial multi-link flexible multibody system is studied based on the continuous contact force method (CCFM). According to the rigid-flexible coupling dynamic theory of flexible multibody system, the rigid-flexible coupling continuous dynamic equations of the system are established by using the recursive Lagrange method. The impact dynamic equations of the system are stylized derived on the use of CCFM basing on the nonlinear spring-damper model. The contact separation criterion is given to achieve the conversion and calculation of the dynamic model for the system at different stages. An impact dynamic simulation example for a two-link planar flexible multibody system is given, as well as the global dynamic response. The results show that the impact dynamic solving method based on CCFM can be used for the global impact dynamics of multi-link flexible multibody systems. The dynamic behavior of the system changes dramatically during the impact process. The large overall motion, the small deformation motion and the impact effect are coupled.

This study used coagulation - ultrafiltration technology for domestic sewage treatment, which was used widely in water supply and secondary treatment with sewage, in order to achieve high efficiency, low-cost, integrated treatment of domestic sewage treatment. This article chooses fly ash coagulant is not only simple preparation process, low cost, and with the traditional aluminum chloride and ferric chloride coagulation effect. The research results show that the coagulation can make the organic particles size distribution to move to larger particles area and significantly reduce colloidal substance. Ultrafiltration membrane system can further remove the coagulation treatment failed to completely remove polymer and part in the process of low molecular substances, to achieve high organic matter removal efficiency. The backwash of ultrafiltration membrane can make membrane flux recovery by about 80%. This system of SS can remove more than 95%, COD removal rate can reach 60% ~ 70%.

N-octadecane microcapsules phase change materials(MicroPCMs) were prepared by thein-situ polymerization method using n-octadecane as core materials, urea-formaldehyde resin as shellmaterials respectively. Melamine–formaldehyde (MF) microcapsules have been widely applied inmany functional materials. Free formaldehyde content are important safetyfactor determining the survival of the microcapsules during fabrication andapplication. In this study, the formaldehyde content of n-octadecane MicroPCMs decrease to 0.35g/Kg which even lower than the standard EuropeanE3 level (0.6g/Kg) through regulation the synthesis conditions such as urea/formaldehyderatio of weight from 1:2 to 1:1.6, urea batch feeding three times ,curing endpH value to 1.0-1.5,reactive time extend to 4h,addition melamine and PVA.

A two-dimensional finite element simulation model of longitudinal welded pipe is established by the nonlinear finite element software ABAQUS. Testing enlargement mould is used for the expanding experiments for the welded pipe under the laboratory condition. The expanding force, ovality and the shape are simulated and measured. Comparing the experimental and the simulated results, the values are fitted well.

To study the failure process of metal structure with meso-defects, RVE (representative volume element) with various initial meso-defects were analyzed by using ABAQUS software, the parameter f (void volume fraction) of GTN damage model was regarded as the criterion of structural damage. The result shows that f increased more obvious with volume of defects for spherical defects with the same shape but different size. When the radius of defects is less than 0.15mm, the influence of defects’ volume on increases of f is clear enough. When the radius is greater than 0.15mm, the effects is diminishing. For ellipsoidal defects with the same volume but different aspect ratio, when the long axis perpendicular to the direction of load, the increased trend of f according to plastic deformation more obvious along with aspect ratio of defects. Apparently, as aspect ratio approaches infinity, f would have the fastest growth. Consequently, the bigger defect volume and aspect ratio, the more conducive for damage evolution of the metal structure.

Silicone-modified phenolic resin was prepared by synthesizing phenol, formaldehyde and phenyltrimethoxysilane, which were supported by Fourier Transform Infrared Spectoscopy (FT-IR). The carbon residual rate of Silicone-modified phenolic resin increased steeply when the silicone modifier was added increasing from 5% to 15%(on resin base) which was tested in an air atmosphere,from room temperature to 800 °C by Thermogravimetric Analysis (TG) ,modified resin of 15% silicone modifier had the highest carbon residue rate. Curing process of silicone-modified phenolic resin determined by Differential Scanning Calorimetry (DSC) was: 80°C/4h+100°C/2h+120°C/2h+160°C/3h+180°C/2h. Curing Kinetic Study on silicone-modified phenolic resin was made to understand the curing process better.

According to complex structure, long production cycle, low efficiency and high training cost of printing machine, the printing machine motion simulation system based on virtual reality is presented. The system used J2205 as the research object and needed Solidworks mechanical modeling software to build 3D models and assemble into the printing machine. Then the assembly was imported into 3Dsmax to map, render and make animation. Through Virtools_Max_Exporter plug-in the digital model was saved as nmo format. After analyzing dynamics principle of printing machine parts, we used script language and the corresponding algorithm provided by Virtools to realize interaction and motion simulation. At last, the system was exported as exe format which can run without Virtools environment. The system realizes the application of Virtools in mechanical industry. Users can 360°view the printing machine, the assembly and printing process. It has an important significance in printing industry, education and training.

According to the operating parameters of a tundish for continuous casting in a steel mill, the temperature distribution of molten steel in tundish was studied by the method of numerical calculation. Change the flow orifice area of slag wall, simulation calculation for the effect of various slag walls on the temperature distribution of molten steel in tundish was done. Through the calculation and analysis of tundish longitudinal section and the surface temperature distribution, temperature uniformity of molten steel in tundish was determined. The calculation results show that: the slag wall can obviously deduce temperature difference between the top and the bottom of molten steel in tundish; small flow orifice area of slag wall can promote the temperature uniformity of molten steel after slag wall.

According to the operating parameters of continuous casting tundish in a steel mill, the flow patterns of liquid steel in tundish were studied by the method of numerical simulation. Changing the flow orifice area of slag wall, to simulate and calculate the influence of slag wall on the flow field in tundish. Through calculating the steel flow vector, to analyze the uniformity of steel flow in tundish, by calculating the inclusions distribution to analyze the effect of blocking slag wall holding inclusions. The simulation results show that: the slag wall can obviously deduce the short circuit flow of steel liquid in tundish bottom. With the flow orifice area is reduced, and the turbulence brisk between two slag walls, and liquid surface is easy to roll; the ability of slag wall holding inclusions enhances, but too small flow orifice area will prompt inclusions passing the slag wall.

Due to the special nature of the fluorine atoms, the fluoropolymer has a spiral structure with C-C backbone was wraped by F atoms, protecting backbone from harsh environmental conditions, and maintain high stability.So fluorocarbon coatings have some incomparable unique properties,for example: low friction resistance, water repellency, oil repellency, non-flammable, etc., so that it has been applied in many applications, and get more and more attention of paint circles. The cationic fluorinated epoxy acrylic resin were synthesized by grafting appropriate acrylic monomers and organic fluorine onto epoxy resin.The impacts of fluorine amount ,grafting temperature,amination time and temperature were researched and the properties of the obtained paint films were tested. The results show that,in the appropriate electrophoresis parameters, the salt water ,aging resistance ,impact strength of film are improved compared with non-fluorinated ethylene acrlic paint.

Cationic polyacrylamide is a derivative of polyacrylamide, a cationic polymer flocculant which has an excellent effect on sewage treatment. Our existing cationic polyacrylamide are mostly prepared by the Mannich reaction ,which has the shortcomings of more unreacted material, low cationic degree, poor stability, short validity, etc. Therefore, a cationic polyacrylamide has been prepared by aqueous solution.P(DAC-AM) was synthesized by aqueous copolymerization of acrylamide (AM) and DAC using complex initiated system consisted of (NH4)2S2O8,NaHSO3 and V-50. Mass percent of monomer, amount of initiator, content of cation monomer, pH, reaction time et al on the effect of intrinsic viscosity of polymer were discussed. The suitable conditions of synthesis were concluded. Mass concentration of monomers:35%, initiator amount 0.06 %,V-50 amount 0.005%,pH:5.5~6.5,urea concentration 0.1%,EDTA 0.02%,β-dimethylaminopropionitrile concentration 0.03%,reaction time 5~6h,the intrinsic viscosity of product is 13.95dL·g-1.

As information is an important factor of modern society, researches on agricultural information resources have a great meaning to improve the development of modern agricultural. With the purposes to improve the effective utilization of agricultural information resources ,the paper take farmers in Jiangxi Province of China as an example to explore the way how to allocate agriculture information resources based on demand of farmers. The paper reviewed on the relative theory of information allocation, and analyzed the demand characteristics of farmers on agricultural information resources. Finally, the paper provides suitable advice on the allocation of agricultural information resources based on the analysis above.

As an environment-protecting waterborne coating, the cathodic electrodeposite coating has wide applications prospects.The self-crosslinked acrylate grafted epoxy resins for cathodal electrophoretic coating were synthesized by grafting acrylic polymer onto epoxy resin . This epoxy-acrylic copolymer both have high modulus, high-strength ,excellent chemical resistance and corrosion resistance of epoxy resin, and both have the light-acrylic resin fullness, good weather resistance and other characteristics of acrylic resin,which are widely used in the automotive, building materials, home appliances and other fields.The electrophoretic coating is an extremely complex process. The effects of the parameters of electrophoretic technology on the properties of paint films were studied systemically.The results show that the electrophoretic paint with better appearance and propeties can be made when voltage was about 90V,the solid share was 16%,pH was 5.8and electrophoresis time was 2-3min.

The ultraviolet aging of asphalt and asphalt mixture has attracted attention worldwide from research progress and testing methods. The research progress and testing methods of ultraviolet aging of asphalt are described in this paper. Author also briefly discussed the methods for improving anti-aging properties of asphalt and asphalt mixture.

For Wireless Sensor Networks (WSN) is responsible for sensing, collecting, processing and monitoring of environmental data, but it might be limited in resources. This paper describes in detail the compressed sensing theory, study the wireless sensor network data conventional compression and network coding method. The linear network coding scheme based on sparse random projection theory of compressed sensing. Simulation results show that this system satisfies the requirements of the reconstruction error of packets needed to reduce the number of nodes to the total number of 30%, improves the efficiency of data communications in wireless sensor network, reduce the energy consumption of the system. With other wireless sensor network data compression algorithm, the proposed algorithm has the advantages of simple realization, the compression effect is good, especially suitable for resource limited, and the accuracy requirements are not particularly stringent in wireless sensor networks.

Analysis strategies of nonlinear electromagnetic interference have always been a focus in the literature. This paper designs a identification of scattering pattern by using a improved least squares method (LLM) combined with method of moment for mutual coupling among inner elements and interactions with outside scatterers. The novel LLM is applied to optimize the radiation pattern of arbitrary arrays in the operational environment as well as represses the array gain and phase tracking error caused by electromagnetic compatibility based constraints. The algorithm has a simple control structure and enhances the robustness of the electrical system, and the experimental results based on dSPACE testify its reasonability and validity.

In order to improve the coke residue of phenolic resins (PF), different solvents were used in the present work. The research indicates that in comparison with other solvents, such as ethylene glycol (EG) and ethyl silicate (ES), furfural (FF) can enhance crosslinking density and increase residual coke yield of phenolic resins (PF). The results demonstrate that the residual coke yield of PF with furfural is 68 % higher than that with other solvents. In addition, pyrolysis peak temperature of PF with furfural is relatively high and pyrolysis process is more smoothly. FTIR results show that new bonds formed in PF when take furfural as solvent, and furfural changed the structure of phenolic resins. Raman spectra analysis results show that the order degree of the carbonized products (treated at 800 °C) is higher than that in other solvents, and stability of the carbonized products is improved. The research concludes that the type of solvent has great influence on the structure and coke residue.

The test of nano-diamond cathode field emission characteristics was conducted by changing the vacuum, the influence of vacuum change on nano-diamond field emission characteristics was also explored. It was found that under the condition of low vacuum, nano-diamond field emission turn-on field is relatively high, as the vacuum increases, turn-on field decreases gradually, and current density increases. When system vacuum reaches to above 10-4Pa level, turn-on field becomes stable, the stable value is 4.5 V/μm; and current density also becomes stable, the stable value is 117 μA/cm2; the luminescence effect of anode which is 200μm distant from the cathode in the vacuum chamber also becomes stable. Results show that 10-4Pa is system vacuum limit parameter of stable working of field emission display, the experiment provides a basis to the design and manufacture of nano-diamond field emission display.

OFDM (Orthogonal Frequency Division Multiplexing) is a special kind of multi-carrier digital modulation technique. Each OFDM subcarrier exists orthogonality and great use of spectrum resources. To a certain extent, the problem of shortage of spectrum resources will be eased in the future. OFDM has a good ability to resist inter symbol interference and fight against frequency selective fading, and be able to adapt to the future wireless high-speed data transmission without distortion. Each channel modulation and demodulation with FFT and IFFT is easy to implement and meet the need of the business in the wireless communication system. The paper introduces the basic principle of OFDM technology, describes the advantages of OFDM and the defects needed to be overcome. Moreover, we analyzes the characteristics of 4G technology and discusses the application of OFDM in 4G mobile network.

Carbon nanotube field emission display (CNT-FED) is one of the most significant subjects due to its unique qualities and perfect performance. But there are still some problems in FED, for example, the modulation of each pixel unit of field emission display device is discrete, and the traditional voltage pulse-width modulation driving mode cannot solve luminance non-uniformity and non-linearity of FED. So a novel driving circuit based on cathode current source is proposed. The current driving circuit can be fabricated on Si substrate in advance, and then carbon nanotube is grown at room temperature, carbon nanotube and constant current source circuits are integrated on the same Si substrate. Current source circuit and cathode emission part are integrated together, which not only can solve the FED luminance problem, but also can meet FED thin design.

The existing trust model in P2P network is limited in inhibiting feedback-cheating peers’ behaviors and can not fully resist the collectives’ attack. To solve this problem, we present a new trust model. It take Malicious Percentage (MP) and Feedback Consistency Percentage (FCP) as the new trust evaluation criterion to help filter malicious peers in selection strategy of peers. For feedback-cheating peers, we use global trust value to distinguish between true and false feedback information. Experiments demonstrate that our model is effective in resisting feedback-cheating peers’ behaviors and collectives’ attack.

The quality of application maintenance is directly related to operating results, as well as the life cycle of applications. In today’s digital business environment, application failure or unexpected downtime can have a devastating impact on any organization. In order to ensure the stable and efficient operation of applications, we have studied the general framework of proactive application maintenance, researched and practiced efficient operation technology, established comprehensive operation support processes, formed a high level operation and maintenance team, and achieved good results at Tsinghua University.

The competition is very fierce in the modern business, more and ore enterprises believe in the importance of service marketing. This paper analyzes home appliance retailing service marketing from the view of customer value and put forward many strategies, such as: service design considerately, hearty service and setting up the whole system of service marketing. As a result, it improves customer satisfaction, so as to enhance the Chinese home appliance retailing service marketing level.

In view of the petroleum and petrochemical characteristics of horizontal tank, ANSYS software of finite element analysis was carried out on the horizontal tank within the magnetic flux leakage testing, analyzes the influencing factors of defect magnetic flux leakage signals. Experiments verify the finite element analysis results, the experimental results show that the research of horizontal tank within the magnetic flux leakage detection effect is obvious.

Studied the main theory about helical cylindrical spring design, based on the existing theory,found the parameters that affect helical spring's stiffness, size, stroke, and also how much they effect the parameters. Draw the curve which can be a reference for helical cylindrical spring design, put forward a method of cylindrical helical spring design, which is according to the installation dimensions and working stroke and applicable to the design of cylindrical helical spring when is given workspace and stroke. Provided a new reference for the design of cylindrical helical spring, with important significance to engineering design.

Analysis the common gear fault signal, using continuous wavelet transform well time-frequency characteristics and failure mechanism gear features, combined with quasi-periodic signal rotary mechanical characteristics of the continuous wavelet transform fault signal. This method can reduce the noise source and other incentives interference, remove the specific needs of the signal to improve signal stripping effect, the use of a certain type of gear failures this step, to get a clear diagnosis results show that this method has proven a strong application space.

Firstly, taking into account the load forecasting error and uncertainty of wind power, the coal saving benefit and network loss of the reserve are combined into integrated coal consumption of thermal units. Then, the consistency constraints of reserve capacity are derived. On the basis of the work mentioned above, the optimal reserve distribution model for power system with large scale wind power integration is proposed. This model is used to compare the network loss, integrated coal consumption and the allocation of reserve before and after adding consistency constraints. Finally, simulation results on the IEEE-RTS24 system verify the effectiveness of the algorithm in solving reserve transfer between units, ensuring the fairness of market and providing a reference to dispatchers.

Articles with engineering examples discussed in the frame - shear wall structure of how to lay out the structure can effectively enhance the seismic performance of validated reasonable set of structural shear wall seismic played a key role, and for the frame - shear wall structure summed up the points to improve the seismic performance measures and design methods.

By using the computational fluid dynamics software Fluent and the choice of the reasonable mathematical model, the flow, heat transfer and combustion are simulated in a 300 MW tangential firing boiler furnace. In the process of numerical simulation in the furnace, the gas phase turbulent flow usesRealizable model for both sides and solves the governing equations using SIMPLEC algorithm. Calculation results show that the highest temperature in the furnace is in the burner area,the whole furnace space rotates flow field, residual rotation still exists in the exit of the furnace, and the smoke temperature deviation causes in the residual rotation of furnace exit.

Zhengzhou East Green high-speed rail block D6 site supporting of deep foundation pit engineering, double row pile composite retaining structure design and data analysis. Through specific examples of projects, based on the measured data shows that support form of the rationality and practicality.

Multiphase flow experimental facility is an indispensable part in the construction of laboratory of oil and gas storage and transportation, and the gas-liquid mixer is an important part of the experimental facility. Because the existing gas-liquid mixer has certain limitation, the author designs a new type of gas-liquid mixer on the base of existing mixer. Finally, through calculation of CFD simulation software, the new mixer can achieve good mixing effect and satisfy the requirement of experiment.

An optical fiber based data transmission link for a four-axis gyro stabilized inertial reference system is presented. The operation and configuration of the gyro stabilized platform is introduced to explain the requirement of data transmission. Four passive fiber optic rotary joints (FORJs) instead of traditional electrical sliprings are used to transmit optical signals between these relatively rotating gimbals. The hardware and software design of this optical fiber communication system operated at an updating rate of 1kHz are described to achieve high-speed, real-time, reliable data transmission. The experimental results show that the fiber optic rotary joint-based data transmission link is real-time and reliable. The use of FORJs as fiber optic sliprings will also result in an extremely low friction torque by comparing to electrical slipring assemblies. This allows the system designer to optimize the servo control performance for such high-precision gyro stabilized inertial reference systems.

This paper introduces the Web 2.0 technology commonly used in the SNS (Social Network Sites), and analyzes the changes of information environment of library. Based on the theoretical discussion and the research on technology, we design a socialized library information service platform based on Web 2.0 technology.

We propose a new technique for cancer diagnosis from proteomic profile, which mainly contains four steps. Firstly, the original profiles are preprocessed by baseline correction, denoising, compression and rescaling. Then, the profiles are modelled by maximum margin criterion (MMC) analysis. After that, a consensus technique is utilized to identify the discriminant features. Finally, support vector machine (SVM) is applied to classify the modelling data. To study the validity of the proposed method, it is worked on classifying two proteomic profile datasets, the normal and the cancer samples. The results show that the method is efficient.

The microscopic deformation mechanism was taken into account to research the high efficient solid ice and snow clearing technology. The solid ice and snow constitutive model was established, which the deformation mechanism of snow microstructure and macroscopic continuous behavior were linked together, considering the damage of solid ice and snow depends on the mechanical properties of the snow volume elements of the grain bonds between grains, and using the microstructure factor scale the stress state of microstructure in the continuous stress. The density is 520Kg/m3-600Kg/m3 of the solid ice and snow was selected for studying and the homogeneous triaxial loading test was conducted by using the SJ-1A strain control type triaxial shear instrument. The relations of local strain rate with limit stress was established according to the simulation analysis conducted the constitutive model that was been established, the results found that both of those showed a near-linear relations, it was fit with the experience relations. The computer simulation and experimental curves deviated a little, and the reasonableness of the established solid ice and snow constitutive model was verified. Studied have shown that the failure rule of solid ice and snow can be well described by the constitutive model, which presents a theoretical reference for the design of key icebreaking components.

With the rapid development of computer network technology, traditional teaching has been unable to meet the needs of modern teaching, especially for multi-disciplinary, interdisciplinary some elective courses - such as library information literacy courses. We need to use the Internet to reform teaching methods. It is also a lot of schools and units are doing. In this paper, the library information literacy courses, for example, free architecture of a network of research and teaching management services platform, designed to serve teachers and students, so teaching, learning and feedback with each other, sharing feature is now fully raise public library programs, sharing of teaching resources.

It is benefit to improve the snow clearing effect, reduce energy consumption, conserve resources and enhance the performance of the machine was pointed. Using the depth into show, concave disc spacing and the angle between marching directions as factors, snow pack volume flaking, fracture width and snow clearing resistance as objective the three factors five levels orthogonal rotation test was conducted. The interaction between effect spacing of tools ,the fractures great influence on clearing efficiency and energy consumption when clearing the compacted ice and snow by using multi-blade cutting mode was found through the concave disc cutting test. The relation response surface graph was obtained through the analysis of test data by using the Design-Expert 6.0 software. The optimal parameters are: the angle between marching directions is 13°, depth into snow is 38mm~44mm, concave disc spacing is 14mm~17mm, which made the snow pack volume flaking is 124cm3~130cm3, the fracture width is 79mm~80mm, the snow clearing resistance is 0.6KN~0.65KN.

In order to grasp the security situation of the network accurately and provide effective information for managers of network.GeesePSOSEN-SVM algorithm is proposed in this paper. It can produce and train multiple independent SVM through Bootstrap method and increase the degree of difference among SVM based on learning theories of negative correlation to construct the fitness function.GeesePSO algorithm is used to calculate the optimal weights of SVM.The algorithm chooses the high weights of SVM to integrate. At last, through the experiment on MATLAB for network security situational prediction,the results show that the absolute prediction error is smaller ,and the right trend rate is higher.

The collaborative filtering recommendation algorithm based on user is becoming the more personalized recommendation algorithm. But when the user evaluation for goods is very small and the user didnt evaluate the item, the commodity recommendation based on the item evaluation of user may not be accurate, and this is the sparseness in the collaborative filtering algorithm based on user. In order to solve this problem, this paper presents a collaborative filtering recommendation algorithm based on user and item. The experimental results show that this method has smaller MAE and greatly improve the quality of the recommendation in the recommendation system.

The most weakness link in credible monitoring is that how to process multidimensional dynamic behavior data effectively. System behavior monitoring often needs to deal with different kinds of behavior data and those data can adopt status snapshot in multi-dimensional vector form to express. Obviously, data has strong useful knowledge information, which is regarded as a kind of classification ability. So we need to finish the mapping and classification between a variety of network behavior snapshot and dependable level. This paper introduces on network state snapshot owning the characteristics of high dimension, heterogeneous and dynamic and uses the theory of interval intuitionistic fuzzy to judge credible degree in the system and generate behavior quality trust level of nodes.

EDI is an important part of logistics information technology and is also the basis and prerequisite of the implementation for supply chain logistics information system. This paper researches on electronic data interexchange of embedded Linux to promote EDI technology to be widely used in the field of logistics control. First, the paper studies kernel structure of embedded Linux that includes process scheduling, memory management, virtual file system, network interface, inter-process communication and methods and procedures of kernel cutting; then, we can research a number of issues in the logistics field of electronic data interchange supported by embedded Linux. The issues include workflow, hierarchical structure and main applications and so on. Contents of this paper extend the application area and support environment of EDI. In addition, it is an important research direction in logistics informatization used EDI technology.

Usually, the teaching courseware that based on Web having a tree menu and can easily browse and links chapter and section. We study the development of a software system that can automatically generate courseware framework system with the menu tree. Here to generate static pages with dynamic page technology method, the key code of software framework system with the general characteristics stored in the database, and identify the dynamic location will be update. During the background program, according to the user input the information of chapter and section header, create the object code that can generate the directory tree structure; Finally, the teaching courseware framework system will be created that based on user input basic information and choose the courseware page template with the program stored in advance.

In today's business environment, a flexible and scalable infrastructure that delivers service-oriented applications is in great need. We design and implement an approach of application deployment that by orchestrating various operational resources, delivers real-time response to business changes, ensures stable and efficient operation of applications, and therefore improves business benefits and reduces costs.

The AT89S52 MCU is the central core of the system which combined with external circuit modules for data processing. Under the stable supply of 5v DC power, the each module can be initialized by MCU, through the serial port communication technology for data exchange. The single serial bus interface technology is used to obtain DHT11 temperature and humidity sensor testing data in the system. Through the MCU data processing, the detected data will be compared with the alarm data which is given by the users. When a given range is exceeded by the detected data, the sound and light alarm is triggered, moreover, temperature and humidity control is performed. Compared with the LCD1602, the advantage of the temperature and humidity remote monitoring system are the simple structure of the circuit, work stability, accuracy and fully suitable for the need of temperature and humidity monitoring system in human living environment.

In order to effectively reduce the crop stubble harvesters digging resistance, enhance stubbles picking rate and intact stubble rate, the Research Group took structure improvement for the Crop stubble harvester and its critical component based on abundant trials. Three physical machines in succession were developed, and a trial contrastive analysis between the optimized harvester and the first harvester was conducted. It turned out that the improved harvester machine was clearly superior to the first machine.

This design uses GPRS wireless communication technology to achieve remote control of the stepper motor. The system design the software of upper machine by the VC++ based on the TCP/IP protocol. The wireless module SIM300 transfers data to the primary station by its GPRS function. Then the primary station converters the input into differential signal and send commands to slave stations via RS485 and Modbusprotocol. According to the commands, slave stations output the corresponding control signal to the stepper motor. Stepper motor has some protection function when working, such as: acceleration and deceleration and down limit , emergency stop , over-temperature .The result of experiments verifies that the aim of design GPRS-based remote control of stepper motor is realized. It is possible to improve largely both in real-time performance and reliability by using the GPRS wireless technology, it promotes the industrial monitoring and control system more intelligent and informed.

Recommender systems are widely employed in many fields to recommend products, services and information to potential customers. As the most successful approach to recommender systems, collaborative filtering (CF) predicts user preferences in item selection based on the known user ratings of items. It can be divided into two main braches - the neighbourhood approach (NB) and latent factor models. Some of the most successful realizations of latent factor models are based on matrix factorization (MF). Accuracy is one of the most important measurement criteria for recommender systems. In this paper, to improve accuracy, we propose an improved MF model. In this model, we not only consider the latent factors describing the user and item, but also incorporate content information directly into MF.Experiments are performed on the Movielens dataset to compare the present approach with the other method. The experiment results indicate that the proposed approach can remarkably improve the recommendation quality.

The paper is studied on the performances of low power light-emitting diode and high power LED under high-current. After observing and measuring the degeneration of them, the Analysis of the failure mechanism is given. The degenerations of the optical parameter, electronic parameter and thermal parameter of high power LED under 600mA current stress are measured and the failure mechanism is analyzed. The I-V characteristic curve proves that the degeneration is happened in active region. Under high-current stress, the active region of high power LED is ageing which leads to much more defects. The degenerations of pins on the resin package, metal wire and surface layer metal pads are found with scanning electron microscope.