Concerning the shortcomings of C4.5 algorithm, we put forward an improved one. This approach can improve the efficiency to generate the decision trees by reducing the computation complexity of information gain ratio. By applying the improved C4.5 decision tree algorithm to course grades analysis and...

With the development and popularization of E-commerce, more and more information services have appeared on the web. In order to meet users requirements more accurate, several service recommendation systems had been set up. Many methods have been proposed to discover users' interest for service recommendation,...

Base cavity configuration is a useful choice to reduce the base drag of projectiles. This paper interests in the influence of the cavity length on the projectile with base cavity. Base cavity with different length, including terminal one, were investigated numerically. The flow field parameters (Mach...

Nowadays 12kv medium voltage switchgear equipment is widely used in city power supply and distribution system. Combined with the characteristics of KYN28 switchgear, making theoretical analysis with Solidworks software and ANSYS based on the finite element model,the body strength of switchgear was improved...

With the rapid development of Internet technology, big data technology as a hot technology to solve complex computing and software development in distributed application environment is gradually being adopted by all walks of life. Port as a water transport hub, also need to use big data technology in...

With the arrival of the era of big data, recommendation algorithm has become a hot research field in internet life and social business. However, the traditional recommendation algorithms have problems of cold start, scoring matrix data sparse, affecting the accuracy of recommendation. This paper proposes...

With the advent of information age, computer has become a need that is more and more important for the people. Computer cannot only store a lot of data, but also increase the channels for storing data. So people store more and more data in the computer. But there will inevitably be problems for computer...

In order to realize the remote transmission of sensing information in optical fiber sensing network, and ensure that the information data is not destroyed in the transmission process, the feasibility analysis of FBG (fiber grating sensor network) into GPON (passive optical network) is carried out. Comprehensive...

The focus of this paper is the improvement of the quality of texture image segmentation. We proposed a new unsupervised segmentation method based on Overcomplete Brushlet transform and Gaussian Markov Random Field. A texture image was transformed to Overcomplete Brushlet domain, in order to extract its...

This paper mainly introduces a set of automatic leveling system for high precision and heavy load platform and describes the principle of system operating, the component of hardware and software. The angle sensor is the basis of leveling, and the electric push rod is the guarantee of leveling. Motion...

The ensemble empirical mode decomposition (EEMD) is a self-adaptive signal processing technique for nonlinear and non-stationary signals, which can alleviate the mode mixing problem occurring in empirical mode decomposition (EMD). As a improved support vector machine (SVM) method, Twin support vector...

Today's Internet technology becomes more advanced. Computer has been increasingly applied in all aspects of the society, and we will continue to increase and expand. In the continuous development of computer applications, a lot of problems are emerging, in which using computer as a means of theft or...

With the constant progress of science and technology, high-performance computer has experience a long development course since its birth, and the speed for the computer technology upgrade has also become one of the rapidest scientific technologies. The huge changes in the constant improvement of the...

With the rapid development of intelligent substation, GIS equipment and electronic transformer are widely used. So traditional phase-detection on high-pressure substation has been unable to achieve. Using virtual instrument technology, this paper designed a phase-detection meter on embedded computer...

According to a 110 kV within the bridge connection of two-stage backup automatic switch in substation misoperation, line reclosing match problem and the cooperation of the two-stage backup automatic switch device are analyzed in this paper. In view of the action logic analysis, this paper discusses two...

[Objective] This paper aimed to identify the potential factors leading to a preference for online social interaction to offline interaction. [Methods]Based on an online survey (N =233) and a SEM analysis, [Results]findings show that: 1) compared to those who were good at face-to-face communication, individuals...

Due to high firing rate artillery projectile firing rate is high, many targets  exist in the beam at the same time, the cluster target resolution for projectile muzzle velocity measuring is important. The three-dimensional resolution technique based on time-distance-frequency is an effective method to...

The traditional CRC encoder is usually only for a kind of stationary generating polynomial, so the signal sending end and the receiving end is the one to one relationship. To break this relationship, we want to add some control to make generating polynomial can be artificially  easily changed. Finally,...

How to analyze the spatial location relevant data from the Internet efficiently is one of the most important of the work in the software systems field, which is one of the important directions. For many years, researchers have provided lots of analysis methods, but most of them are for ordinary data,...

Vehicle information recognition is a key component of traffic enforcement camera system. Color plays an important role in vehicle identification. In this paper, we propose a method of vehicle color recognition based on SVM and Bayesian classifier combination. For distinguished vehicle color types, support...

The point cloud data obtained by 3D laser scanner is not only simple in structure, easy to operate, but also don’t need store topological relationships between points. They can be used to express complex geometry and surface characteristics of irregular objects. However, in the process of obtaining the...

Query expansion technology is usually used to make abundant query to search information. Traditional query expansion based on WordNet, user search log or user feedback couldn’t get the user’s real intent, sometimes the latter could expand overly. In this paper, we propose a novel query expansion method...

With the improvement of the advanced manufacturing system integration requirement, obtaining graphic data from DXF file provided by Auto CAD software becomes more necessary. DXF is an open vector data format, which is easy to read and analysis, and it has always been the general CAD/CAM researchers’...

In view of rapid development of the high-power DC PWM speed regulating system, this paper adopts the 3G intelligent power module IGBT and INTEL87C196MC CPU of high performance to make technical innovation for the spindle speed regulating system of NC machine tool, and also designs a spindle DC PWM speed...

E-Learning has become an important form of current education. At the same time, the development of semantic web technology provides a new way to solve the problem of information resource management, semantic-based network educational resource became an important research field in computer education technology...

With the rapid development of information technology as well as the popularization of computer and network, in order to meet the different needs of the students' basic knowledge of computer, bring into full play the initiative of students for learning basic computer knowledge, and strengthen the students'...

In this paper, CAD CAM technology applications in the engraving industry related research and analysis CAXA software platform on aluminum alloy thin-walled parts made engraving applied research Completed the process of design and processing, CNC machining tool selection and processing post-processing...

This paper introduces a general model of complex dynamical networks with coupling delays and delays in the dynamical nodes. The synchronization control of the complex dynamical networks with coupling delays and delays in the dynamical nodes has been studied. Via the theory of Lyapunov-Krasovskii stability...

Three-phase asynchronous motor has been widely used in industrial automation fields for the advantages of simple structure, reliable operation,and convenient use, etc, In this article, first of all, the mechanical properties of three-phase asynchronous motor are analyzed. On this basis, fault detection...

In this article,the working principle of the asynchronous motor and its common failure forms are analyzed and summarized.On this basis, the wavelet change of the application of the asynchronous motor that is carried out In normal state and failure state, the motor vibration and current signal was reconstruct...