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At presently the most widely used algorithm is collaborative filtering in the Personalized Recommendation Systems for E-Commerce. Aiming at the problem that the recommendation is not accurate due to the data sparsity, a collaborative filtering algorithm based on user characteristics and item attributes...

In this paper, the author discussed the current popular the grid computation technique and the virtualization technology, analyzed and concluded characteristic of two technologies. Then, VNET has been proposed, which can add the virtual machine to the network efficiently. It can dynamically modify its...

This paper establishes a three-dimensional maritime search and rescue plan by integrating a differential equation model, a global optimal model and an area partition algorithm. Based on the data of flight data and the loss time of communication for MAS MH370, we establish a differential equation model...

In this work, the ground-based GPS data in the West of Taiwan Strait was used to remote sense atmospheric Precipitation Water Vapor (PWV) in Fujian, and dynamically analyzed the spatial pattern change characteristics of PWV, combined with meteorological data, in order to quantitatively analysis the relationship...

In recent years, infrared trigger cameras are widely employed in the fields of wildlife monitoring and protection as they can collect massive image data. It is of great realistic significance about how to conduct automatic processing of these image data and extract key information. This paper has a detailed...

Based on cloud computing architecture and future network service resource architecture using the OpenStack open source framework, design an Service Innovation Platform which can manage development tools and application programming interface in many aspect. Maximum collecting the dispersed, isolated service...

The detection of interface between water and oil is of great significance for the heavy oil exploitation. However, the existing detection techniques have some drawbacks, such as poor efficiency and low accuracy. A new interface detecting method based on the Heat Transfer Rate between oil and water is...

An interface detection method based on fusion boundary enhancement is proposed, and can be used to extract the oil water interface in the test tube accurately. Boundary extraction is carried out by using differential operators, morphological operations of image processing. The fusion of Sobel differential...

Named Data Networking is a future Internet architecture which enables content retrieve and access by its name. Different from the current network, Named Data Networking is more like a distributed network. Nevertheless, users do not know name of the content. In this paper, we present a Keyword-based NDN...

The research of CAPTCHA recognition can discover the security vulnerabilities of CAPTCHA in time. It has great significance in improving the CAPTCHA design method and promoting the design level of CAPTCHA. Text-based CAPTCHA recognition mostly uses the method of characters segmentation and recognition....

Because of fast moving of VANETs node and dynamic topology structure, the traditional wireless self-organized routing protocol is difficult to be directly applied in VANETs. Therefore, the routing protocol of hybrid traffic information perception is proposed. Through the collection of real-time traffic...

Personalized recommendation systems can help people to find interesting things and they are widely used with the development of electronic commerce. Many recommendation systems employ the collaborative filtering technology, which has been proved to be one of the most successful techniques in recommender...

In the Internet environment, software gradually moves from closed, static and controllable status towards open, dynamic and unpredictable state. How to propose suitable software theory for such adaptive software has become the challenging issue facing the computer science and technology. Applicable formal...

The limestone Detection System is developed by Qt assisted by Qwt and Modbus protocol based on Linux platform. The system can detect activity of limestone and PH value in real-time. This article begins with a brief description of the background and the functional requirements of the system, given the...

With regard to the existing test case priority algorithm rarely focusing on the static covering condition of test case and other design information, as well as the testing person need to online collect relevant information about each statement in the procedure, and a higher dependence on code information,...

Aiming at characteristics of wisdom scenic, based on semantics Internet of things technology, we have realized a kind of scenic intelligent information service system which integrates various functions including scenic guide, environmental information perception, etc in one, designed system architecture...

This supermarket management system has realized the transmission and control of large goods, so as to facilitate the management and decision of sales, and reduce a big burden for supermarkets and supermarket managers. It also can help to improve the work efficiency of supermarket. Its requirements is...

Good development framework can improve quality of software development. This paper makes research based on the MVC software design model, after thorough analysis of the current mainstream of three technical framework, combining with their characteristics and advantages to construct SSI fusion framework...

This article proposes a tracking algorithm based on mean shift and particle filter according to the characteristics of moving vehicles. Firstly, the algorithms establish auto target motion model that the core is RGB color histogram. Secondly, using the Bhattacharyya distance measures similarity of particle...

This paper investigates the microstructure and friction-wear behaviour of Scapharca subcrenata in order to obtain useful information regarding the tribological properties of composite materials. The experimental results have showed that the relationship between the friction rate and surface roughness...

As a solid state joining process, friction stir spot welding (FSSW) has a strong potential to be applied in the aerospace and automotive industries. Mechanical property of the FSSW joint takes important influence on connection performance. In the present paper, numerical simulation model of mechanical...

The present study reports that a modified coaxial electrospinning process, which was successfully carried out to control the diameters of shellac fibers. With a Triton-X100 in ethanol as sheath working solution and shellac ethanol solution as a core electrospinnable fluid, the coaxial electrospinning...

The virtual prototype of circular vibrating screen was Established, and the overall structure and working principle of the device were described in detail.The natural frequency of circular vibrating screen was obtained by using finite element analysis software ANSYS to modal analysis,which can provide...

A soft bulletproof layer is made by utilization of the newest domestic Ultra high molecular weight polyethylene fiber, and by composing float-assisting and puncture-proof functions, multifunctional float-assisting, bulletproof, puncture-proof composite clothes is developed, according to the current flaws...

Colored non-slip surface coating has an important role in the prevention of traffic accidents and obtains more and more attention and application. This paper based on chemical reaction principle of poly methyl methacrylate with a curing agent to produce a fast secondary crosslinking reaction coating...

It established APD(Air power drive) starting drive dynamics model. The APD system is put forwarded to improve the vehicle starting drive efficiency. We analyzes the APD working principle, adds a air power and researches for the basic simulation of control model with slip-rate based on PI control theory....

Aiming at the issues that the big intensity of labor, large number of workers, low product efficiency and the quality refractory in the fire-proof material production enterprise in casting sprue clay pipe production pipe molding process in subsequent processing. A system of cutting and stacking of casting...

In order to improve the accuracy of fault diagnosis, this paper puts forward a method of wavelet packet combining neural network fusion. By wavelet packet decomposition and reconstruction of normal and fault vibration signals of aero-engine rotor, the feature vector from the vibration signal can be extracted....

Epoxy/graphene nanoplatelets(EP/GNs) composite was prepared by ball milling(BM), using diglycidyl ether of bisphenol A(DGEBA)as matrix, Diethyltoluene diamine(DETDA) as curing agent, GNs as thermal conductive filler. The mechanisms and influence of different BM time to exfoliate layered GNs and compound...

According to the problem that the quality assurance of acrylic is not reliable, we use the Michelson interferometer theory to build a Spectral-Domain Optical Coherence Tomography system composed by reference arm, sample arm and spectrometer. Obtaining the 2D and 3D pictures, then measuring the thickness...

Start-up mark is an important factor leading to woven defects. The reasons of start-up marks were discussed. At present, cloth fell displacement is a main factor to produce start-up marks for a loom. The relationship between cloth fell displacement and its influence factors were studied. Intelligent...

A new method is presented for variable duty cycle of photovoltaic subregional maximum power point tracking(MPPT).It has combined the advantages of the popular MPPT method ,In different areas of photovoltaic power generation using different duty cycle control method, Optimization of the target area using...

Data fusion is one of the research hotspots in the field of wireless sensor network. In allusion to the problem of excessive energy consumption of existing fusion methods, a data fusion scheme with minimized energy consumption is proposed in this article on the basis of the compressed sensing theory....

Volatile phenols are a class of protoplasmic toxicants which have caused inevitable environmental problems in many sea areas. This paper analyzed the content, pollution level and distribution of volatile phenol in bottom waters Jiaozhou Bay in May, September and October 1983. Results showed volatile...

Today, Advanced Persistent Threats have become typical network security threats. However, traditional methods of defense such as rule matching, virus database and vulnerabilities database can only reflect the characteristics of the known attacks. For the unknown APT attacks hidden inside the system,...

The existing security policy description languages can’t support distributed policy self-management and have some problems in the aspect of describing capability, extensibility, portability and other issues. Against these problems, this paper proposes a security policy description language SPDL for distributed...

The optimization of maintenance interval of new equipment by simulation is brought forward according to related maintenance requirement and reality. According to the features of equipment, the basic hypothesis that failure rate increase linearly, deteriorate coefficient is opted to adjust failure rate...

A communication network can be modeled by a graph, whose vertices represent the nodes and edges represent the links between sites of the network. Therefore, various problems in networks can be studied by graph theoretical methods. The vertex integrity, the edge-integrity not only give the minimum cost...

Power Enterprise Operational risk is a major issue for the power companies. Based on the study of operational risk index system of domestic and international power companies, using the Delphi method to determine the power of operations risk assessment index, then using AHP and fuzzy set theory to determine...

Currently, the Top-k keyword search of uncertain XML returns only the top k probability value of the root node. We need further processing to constructed the sub-tree that it meet some certain conditions. To solve this problem, this paper defines a new Top-k query semantics SRRT-Top-k that based on the...

As to solve the issues of insufficient training data and initial parameters sensitive in existing protocol anomaly detection based on hidden Markov model, presenting a new protocol anomaly detection method based on improved genetic algorithm and hidden Markov model. First, the local competitive selection...

In this paper we propose one method for mechanical vibration signal analysis. The given mechanical vibration signal is firstly decomposed into several intrinsic mode functions (IMFs) by the empirical mode decomposition (EMD) method. The Hilbert transform of each IMF, calculated by a recently developed...

Cyberspace has become an important domain the same as the land, sea, air and space. Many cyberspace models were proposed to explain such a high coupled complex domain, but lack of practical method of construction these models make them hard to function. This paper proposes an event based method of construction...

This paper presents a terrain rendering technique for large, textured terrain, which uses Parallel-based error metric. In a preprocess, the domain was first tiled and computed into a nested geometric space error map based on geographic theory, taking the advantage to save displaying memory with terrain...

Along with the development of information technology, the network education is rising and the online courses are innovating. But the information of network resources is so huge, that it is too difficult to distinguish between good and bad. The students spend a lot of time to find the information they...

The repairable system is influenced not only by the depth and breadth of repair, but also by operating conditions, work intensity, mode of operation and many other factors. The failure strength of the system will change once the maintenance effect is significant. And the segmented point process model...

With the rapid development of IT technology and Internet, Network security has become an unavoidable issue, the pure firewall strategy can't satisfy the need of safe and highly sensitive departments. The network defense must adopt a deep, various means, intrusion response technology research has become...

Fluid-structure coupled methodhas beenapplied to research the aeroelastic stability of compressor blades, and the effects of high-low altitude on blade flutter characteristics are investigated through comparison. Results show that, thesefrequenciescorresponding to displacement, elastic strain of blade...

Fault simulation is an important part of power system dynamic simulation, fault models in fully dynamic simulation software of power system simulates all kinds of symmetric and asymmetric complex faults by fault branch admittance matrix. Handling multiple faults and random faults by admittance matrix...

With the rapid development of modern science and technology and the continuous advancement of industrial technology, more and more CNC bending machines have been applied in modern production and the development has become more mature. This paper introduces briefly a cable bending tool with the following...