With the development of economy and technology, data mining which is based on databases and business intelligence has been developed and widely applied to all fields, financial field included. It can explore hidden, useful information to help decision makers to search for the relationship among data...

Fuzzy Mathematics produced in 1960s, its formation and development do not want to give up mathematical accuracy, rigor, but to make the objective existence of some of the ambiguity of things and phenomena able to use mathematical methods to study and deal with. The so-called "fuzzy" means things are...

With the continuous development of social progress and economic and cultural, of gradually entering the information age, in the new situation of rapid development of information technology, science and technology constantly updated, electronic communications equipment as advanced science and technology...

Instant messaging technology in the mobile Internet has been widely recognized, the relationship more closely to user requirements can be more real-time multimedia communications, which requires a network connection in the mobile Internet is not very stable environment and provide a reliable instant...

In recent years, in china, more and more enterprises begin to use the ERP system in the financial management. ERP makes the informationization level of financial management rise to a new height, and the wide application of ERP system brings unprecedented opportunity to enterprise's modern management....

Traditional smart home system is mainly used to form a wired manner, such as RS-485/X10/Lonworks/CAN and the like. Add or delete a wired network equipment will involve changes to the line, and large projects affect the interior decoration of beautiful, poor scalability of its systems, installation, commissioning...

The accuracy of the camshaft directly impact the noise, dynamic performance and economy overall performance of automobile engine. This paper will measure the repeatability of the current index value of automotive components testing equipment corresponding analysis and give a set of the integrated measuring...

This paper focused on the railway transportation industry in the era of big data, and researched on the Statistical Information System of Freight Train Formation, collected its business data in 311train operation depots of 18 railway bureau as total sample and 35 statistical targets as dependent variables,...

The L1 performance analysis is studied for continuous-time interval positive systems. In this paper, necessary and sufficient conditions for stability and L1 performance are established for positive linear systems through linear inequalities.

The database is long-term storage in the computer, organized, shared data collection. Database to store large amounts of information in an effective and quick access to play an important role, it is the core and foundation of large information systems. Database management system is to establish, use...

Users can add a Wechat public account by scanning QR code, then input text and voice information on chatting interface, searching for pertinent sentences in Database table through connecting with the MySQL database and return pertinent text answer to user's chatting interface.

In this paper, a novel approach to dynamic output-feedback control is established for positive systems with interval uncertainties. Necessary and sufficient conditions for the existence of robust controllers are established.

Research on how to use the video or image sequence variation in the shadow of the sun to determine the time and space that captures the time and place locate problems, combined with solar elevation angle formula, established a shadow the length L and the latitude , longitude , sun angle , height and...

Firstly, explained the situation and development trend of indoor positioning technology, and discusses the use of UWB signal indoor positioning technology to achieve the principle of further argues that the analysis of the indoor positioning system solutions. By combining the latest technology of the...

As a support network of the smart grid, the reliability of electric power communication network has become the prerequisites of the smart grid to become intelligent and economic, and operate safely. This paper mainly studies the vulnerability of the electric power communication network, so as to provide...

Tremendous impact e-commerce development to human society makes a series of research in related fields to become a global hot spots. In recent years, the development of e-commerce has gradually slowed down, which is one of the main security problems that hinder its development. It can be predicted to...

To adopt electric power communications network overhaul management system for electric power communications network management can increase the regularity of communication overhaul and the operation reliability of communication network. Based on that, this paper studies the electric power communications...

With the rapid development of extreme high voltage technology, more large-scale electrical equipments are gradually put into use. However, due to the complexity of these devices on structure, and the electric field calculation in equipment operation will be confronted with great difficulties. Therefore,...

This paper has a research basis on the leveling data of 5 years from 2008 to 2012 in cross-fault grounds of Fujian and Jiangxi province, by means of establishing three-dimensional finite element model to calculate the level of observed changes across the fault when the fault dip angle and the fault strike...

From in-depth research on the basic principles and architecture of search engine, through secondary development for Lucene development package, this paper designs an entire search engine system framework, and realizes its core modules. This system can make up for the deficiency of the existing Lucene...

To meet the demand for the geotechnical information system management, this paper has put forward a plan to develop the management information system by using GIS and commercial database management technology. It has also described and analyzed the development of the function modules of the system and...

In recent years, with the development of key components of optical communications, wireless optical communication technology is developing rapidly, and gets a lot of attention and research. Wireless optical communication technology is superior to traditional radio communications technology, in that it...

Clothing pattern design is the most key link in garment production process, and is the most important part of the costume design, is a clothing design and technology of the connection of the bridge. With such as clothing CAD technology widespread application of digital technology, the clothing pattern...

With the development of the apparel industry and the renewal of the computer technology, computer aided design CAD is gradually widely used in the field of fashion design. In today's high working pressure, under the background of the fast pace of life, it is widely hoped to get warm living space. Therefore,...

This article introduces the error comparison of the improved wind power forecast system which changes the data input and re-models and the original one, which was done in Liaoning Zhong San Jia Wind Power Plant. Throughout one year's contrast analysis in 2003, it is found that the accuracy rate has increased...

Traditional histogram enhancement algorithm to enhance image has the defect of over-bright image, amplified noise, and missing image details. In view of these defects, this paper proposes an image enhancement algorithm based on second generation wavelet integer transform. At first, use the second generation...

Chinese traditional sports culture as an important part of the world sports culture has its own unique value and significance. But with the development of the global information technology, Chinese traditional culture has been invaded step by step by modern western sports culture. Under the global information...

In this paper, travel services rely on a travel service network platform, the system is divided into two parts. Foreground is based on personalized recommendation and divided into hotels, travel blog module, Special, theme planning, business travel, interactive community. The background is mainly to...

The paper aims to study a design and practice of sports injuries network consultation. According to sports injuries study and theory, combine Internet technology and module theory designed sports injuries network consultation system. This paper makes explanation on design ideas, technology crucial module...

In many fields of scientific research and production practice, the temperature control occupies a very important position, especially with a pivotal role in the industrial and agricultural production. With the development of electronic and computer technology, PLC from the original amount of simple logic...

DC motors convert electrical energy into mechanical energy, compared with AC motors, DC motors have many advantages good speed performance, high starting torque and overload, etc., it is widely used in machinery industry. MCU control DC motor is a typical application in mechanical and electrical control,...

In the current society, with the rapid development of science and technology, many new techniques have found increasingly extensive applications in various fields. The ZigBee wireless sensor network experimental platform is a representative technique, which has shown favorable functions and results during...

With the rapid development of the power system, there has been a higher requirement of the power transmission lines. However, the traditional power transmission line test usually adopts the helicopter aerial survey and artificial visual inspection, which might incur a high inspection cost but can hardly...

With the rapid development of computer networks and the popularity of network applications, network security has been people's increasing attention. Network security is an important issue under Network environment, and authentication technology plays a very important role for network application security....

Development and improving and bringing very great impact to network of the network technology of the computer, the security question of the network has become one of the focuses of the social safety question of information. In this paper, through the analysis of computer network information security...

With the rapid expansion of the rapid development of computer network technology and network coverage, network security issues are increasingly complex and outstanding looks up. In this paper, we have the analysis of the CAN security situation, put forward the principle of network security policy-making...

With the rapid development of network science and technology, people are dependent on the network and usage greatly improved, but the network to bring convenience, but it also brings a lot of network security issues, it has become a constraint computer network construction greatest limiting factor. This...

With the popularization and application of wireless networks, people are dependent on wireless networks is increasing, at the same time the security of wireless networks has become the focus of attention. In this paper, a wireless network security methods and technology were more in-depth study, since...

Traditional collaborative filtering algorithm based on item and K-means clustering algorithm are studied, the parallel algorithm of collaborative filtering Item-based on MapReduce is proposed by using MapReduce programming model. The algorithm is mainly divided into two steps, one step is K-Means algorithm...

In recent years, with the rapid development of creative industry, fashion bags has become one of the important element in the accessories. Especially for women dress collocation, the choice of luggage is indispensable link. Luggage industry market development prospect of huge potential, bags designer...

In collecting on the basis of traditional batiks patterns, the traditional batiks patterns are classified and summarized the composition of traditional batiks patterns in the form of law, law of color, pattern characteristics, cultural connotation, refining traditional batik pattern elements, will be...

In this paper, the information of Internet and enterprise and customer information exchange communication bridge tool, study of the key components of the automobile manufacture of manufacturing applications, and stamping die design and manufacturing, from the six case analysis, mold manufacturing, cost...

Rigid rapier loom uses rigid rapier to grip the shuttle and do the reciprocating movement to realize weft insertion. To grip and release the shuttle, a complicated mechanism is used. But usually the stability of the mechanism is not good and the installation is complex. According to simulation and experiment,...

The warp tension, which is the let-off mechanism of carbon fiber multilayer loom, for the study object, the article expounds the composition and distribution of tension sensor, and analysis the detection principle of warp tension, thus design a detection scheme of warp tension. In order to solve the...

This paper studies the helical gears in the gear box of cold rolling mill in a steel, using software SolidWorks to make one pair of meshing helical gears a solid model, and import the entity model into ADAMS to creat a virtual prototype model, using IMPACT function to define the contact between gears,...

The machine output power smoothing has an important significance to improve the efficiency and quality of machining. With the secondary development of cutting geometry simulation software, we have got the geometry cutting parameters, carried out a physical simulation of the whole cutting processing and...

With the increasingly severe environmental and energy issues, the application of urban electric buses is more popular, but the battery reserve capacity has restricted the popularity of electric vehicles. Regenerative braking energy recovery system can reduce the energy consumption of the electric vehicle,...

Three kinds of power curve are analyzed aimed at the sense of strength and steering portability. Thus, we put forward a new design principle based on the existing research. The assist characteristic range is divided into four kinds according to the vehicle speed and steering wheel torque. The simulation...

With the development of space technology and mature, four rotor aircraft with its low cost, high performance, unique structure and flight mode and other characteristics, are widely used in military and civil fields. According to the basic characteristics of four rotor aircraft prototype and flight characteristics,...

With the development of large-scale wind turbine, the limitation of the classical aerodynamic characteristics of wind turbine research methods has become more sophisticated, and the improvement of CFD numerical simulation technology has provided a new research method for wind turbine aerodynamic characteristics....

This paper proposes a 4-layer device virtualization system framework based on multi peer nodes. First, the different layers of deployment and the operation processes of the system are discussed, then the resource management and the information flow are described. Finally, the interface and task assignment...

Ground mechanics is the study of off-road driving machine interaction with the ground in a mechanical discipline, vehicle dynamics and soil mechanics is a goalkeeper of combining the interdisciplinary, involving vehicles, ground and its interaction research of dynamics, etc. Mechanical parameters test...

Scanning Electron Microscope (SEM), Transmission Electron Microscope (TEM) and X-Ray Diffraction(XRD)were employed to investigate the influence of heat treatment conditions on microstructure and mechanical properties of a new high strength TB17 titanium alloy at aging temperature from 530øC to 620øC....

The linear model of valveless electro-hydraulic servo steering device neglects the nonlinear factors, especially the factors of the control subsystem, so the quantitative static and dynamic characteristics of the actual system cannot be evaluated accurately. Aiming at the problem, the steering device...

In order to study the transition of material properties under the environment of high temperature and vacuum, a micro vacuum heating observation equipment was designed. The vacuum system can create the vacuum environment. And the heating system can create the high temperature environment. This equipment...

Constraint-variable correlation is the most important coupling correlation in unit commitment problem. Reasonable arrangements for the correlation will simplify the model complexity, and reduce the calculation time. And minimum on/off time constraint is one of the most complicated time coupling constraints....

This article is based on the subsoiler as the research object. 3D model is established using large finite element analysis software analyze and optimize the structure afterwards. The structure and thickness of the subsoiler have been optimized and the feature parameters have been changed from different...

Linear acoustics is adopted to analyze the influence on the entry diameter of the gas inlet orifice on the acoustic damping of the injector. The impedance tube method is used to assess quantitatively damping capacity of entry diameter of the gas inlet in order to find the best structure parameter of...

The defect detection of plastic gear is difficult because of its small size, so a method based on machine vision is proposed to inspect plastic gear accurately and quickly. Digital image of plastic gear is collected by CCD camera, and then the image is preprocessed to generate single pixel edge of gear....

Odometer lever arm effect on strapdown inertia navigation system initial alignment with odometer is studied in this paper. This paper presents an error compensation method of odometer lever arm. In this method, the difference between output velocity by odometer and velocity output by SINS is taken as...

In order to improve the traditional pneumatic rubber tire performance of puncture-proof, explosion prevention and environment adaptability, a main-auxiliary spring structure wheel was propesed. The new wheel composed base on metal helical spring mutual woven and interwined. By analyzed the system structure,combined...

In order to get a further reduction on pressure loss of a reactive muffler, the interior flow field of the muffler and the generation mechanism of pressure loss are investigated by the CFD method. Then, the influences of the insert tube length on the acoustic and aerodynamic performance of the expansion...

The gas dynamic features of Unmanned Aerial Vehicle (UAV) cause flight attitude control error in aerodynamic disturbances, it need for stability flight control design of UAV, to improve the UAV flight stability property. Under the condition of large disturbance, the uncertainty of parameters of flight...

In the complex components of aircraft roller bearing forming process, it is influenced by the surface mesh inducing factors, resulting in processing accuracy is not good, the error is large. An optimal roller bearing forming machining cutting method is proposed based on the internal tooth interference...

Aimed at the problem of engineering vehicle hydraulic mechanical transmission system efficiency is low.Thispaper mainly study of the engineering vehicle automatic transmission shift schedule.Through the artificial set the minimum numerical efficiency,this paper obtained the automatic transmission shift...

We take heat transfer between water and air and heat dissipation capacity of bathtubs into consideration and discuss the influence of bathtub shapes on temperature. We keep the temperature of bathtub in 39 degrees Celsius.We assume that the bathtub's capacity is the same and try to find the best shape...

According to main circuit characteristics of chopper cascade control system under steady state, and system speed characteristics, mechanical characteristics, differential equations of main circuit of chopper cascade control system is established under state-space averaging method. Using the second-order...

Based on the measured data of wide area measurement system(WAMS),a method of automatic trend identification for frequency in power system is proposed.Using data-smoothing technology to eliminate the influence of the signal noise such as burr to extract the overall trend of the signal and combining with...

In order to identify the power oscillation of the power grid and take the corresponding measures quickly,a method of identification for power oscillation based on the measured signal curve in power system is proposed.The measured data is processed to extract the overall trend of the signal and combining...

Charging pile, an important supporting infrastructure, is necessary for the development of electric cars. In this paper, combined with Chinese actual situation, we propose that currently car manufacturers should implement the alliance charging pile model between car manufacturers and power grid enterprises...

This paper proposed a basic model and an optimized model to obtain the temperature field of water in a bathtub with and without bubbles. Firstly, the basic heat transfer model is established based on the three-dimensional N-S equations, the heat transfer differential equations and cuboid boundary conditions....

The engraving process of projectile is a very complicated mechanics process,In this paper, the artillery projectile engraving tube process is the research object, using the WDW-T200 microcomputer control electronic universal tension and compression testing machine of projectile and barrel samples of...

Advance borehole is commonly used to prevent outburst in driving working face, while the influence scope of drilling is limited in deep mining, resulting in large drilling construction and taking very long construction time. A slotting technology by using self-excited oscillation pulsed water jets is...

The phase angle utility is a critical piece of information for operation of power devices feeding power into the grid like PV inverter.A Phase Locked Loop (PLL) is a closed loop system in which an internal oscillator is controlled to keep the time/phase of an external periodical signal using a feedback...

For the problem about identification of VSAT network, a VSAT network identification technology using the priori information of VSAT network is proposed based on synchronization among different carriers' bursts. The validation via practical data shows that the method is applicable to the VSAT network...

Portable through wall radar display and control system is bridge between the radar signal process system and users. On the one hand, radar display and control system receives the origin image signal and present it to users after processed it, on the other hand, the system receives the users' instructions...

In this paper, we conduct research on the data mining and pattern recognition algorithms and the applications on information security engineering. The complete solution for network security firewall defense should have not only, should also be real-time monitoring to the network as can find intrusion...

With the development of the transmission line, it is more and more important to analyze the unbalanced tension of the tower. The non-contact method of measuring the insulator deflection angle uses image processing techniques, and the experimental results show that this method has better recognition speed...

In order to solve security problems such as user privacy information revealed after mobile phone lost, based on Android broadcast mechanism and backstage service technology, improved data storage way and self-startup mode of original mobile phone security software, added SMS encryption message broadcast...

Measurements of gas holdup and velocity are required in gas/liquid two-phase flow. Using electrical resistance tomography (ERT) technique, the cross-sectional image can be obtained, and hence the gas holdup is estimated. Combining ERT with the cross correlation flow measurement technique, the velocity...

Electrical capacitance tomography (ECT) is a technique developed in recent 30 years, which aims to measure multi-phase flow. The image reconstruction for ECT is an inverse problem to find the permittivity distribution in a pipe. The normalized capacitance measurements are needed during the process of...

RV reducer is an important function part of industrial robot joints. The cycloid gear measuring problem is the key part of high precision RV reducer manufacturing. A brief introduction to the forming principle and formulas of RV reducer cycloid tooth contour. A new method for measuring the contour accuracy...

Researched the uncertain Job-Shop Scheduling, on the basis of the original triangular fuzzy number to describe fuzzy processing time, structured the fuzzy Job-Shop Scheduling model. Algorithm using the concept of "big valley" topology represent solution space, using strong swap mutations in early immune...

This paper uses a queuing model of multi-server system to offer optimal airport wheelchair service which minimizes the cost and offers service of high quality. It addresses the performance of airport wheelchair service associated with the waiting time of passengers who need the service. According to...

This paper sets up the communication network model to explore social information network's evolution. The communication network model consists of topology structure, communication capacity analysis and topology prediction. Nodes are composed of five kinds of media. Links indicate that there is information...

In order to solve the problem B of the 2016 Mathematical Contest in Modeling(MCM) , I study the decision problem of cleaning up the space debris. To determine whether a viable commercial opportunity exits, I establish models as follows:First, I study the present situation of debris and the methods of...

Water scarcity has emerged as a top-tier global issue for both environment and development. However, how to mitigate water scarcity is a real problem. We choose Shandong Province in China with heavily overloaded water as our research object., we propose an intervention plan concerning social consciousness,...

In order to analysis marine detection performance of the satellite-based AIS receiving system and provide a reference for related algorithms, the relationship between signal detection bit error rate(BER) and detection probability is analyzed and simulated, besides, the detection BER is simulated at different...

The most prominent feature of the thermal battery is the high discharge current density,especially pulse discharge,which has high specific energy and power;followed by a short activation time,very flexible to use,this is unmatched by other battery;followed by the ability harsh environmental conditions,particularly...

The construction of digital campus gives undergraduates a more convenient way to access the Internet and there have been stored massive network data. In this paper, use clustering algorithm and log file analysis to analyze these data to understand undergraduates' network status and the relationship between...

To deal with the problem of smooth image progressing on the edge, presents a multi scale image fusion algorithm (SLP). The algorithm is based on the local Laplasse filter. First of all, using the local Laplasse filter, the images are decomposed into detail layers and smooth layers. Secondly, the detail...

In this study, we developed a new portable hand perfusion imaging system for rehabilitation evaluation based on laser speckle contrast imaging (LSCI). The new system measured perfusion changes in hand surface quantitatively. The hardware of portable imaging system consists of compact optical and electrical...

Water hammer phenomenon often occurs in the high-rise buildings air conditioning chilled water system, and cause enormous damage. With the help of Flowmaster platform, network model was built to simulate water hammer with different pipeline models, and the simulation results show that the water hammer...

The multilayer U-shaped bellows' strenth and axial stiffness are studied by ANSYS finite element analysis. The plane axisymmetric model of multilayer bellows is established, and the material nonlinear, geometric nonlinearity and contact between the layers of multilayer bellows is considered, obtained...

Cavitation effect is one of the main mechanisms of ultrasonic descaling. Through the mixture model and the cavitation model in Fluent, the ultrasonic cavitation field in the pipe is simulated. The simulated distributions of pressure field and variation of vapor are analyzed and discussed. This study...

This paper reports the design and analysis of a novel pyramidal horn antenna based on Micro Electro Mechanical Systems (MEMS) technology, which is used in terahertz (THz) applications. The structure of the antenna includes two parts, pyramidal horn structure and rectangle waveguide for feed, the fabrication...

Integral impeller is the key component of aeroengine, which reflects the development level of a country's equipment manufacturing industry. The function, technical requirements and processing difficulty were introduced in the paper. The machining processes of a axial-flow impeller was described. The...

In snubbing service, the spherical BOP plays a vital role in shut-in well and running and pulling tubing. The shell and rubber core are the crucial components of spherical BOP, taking the three-dimensional software SolidWorks as a platform, these two components 3D model have been established, and the...

DC power distribution system can integrate the distributed power generation system effectively and fully utilize this important event to maximum. It can increase operation efficiency, enhance service reliability, improve power quality and interconnect distributed generations safely, this is a new developing...

Different energy systems were developed on the basis of the major equipment of distributed energy systems (DES). According to the demand of loads, energy prices, and technical and financial information about optional technologies, using non-linear programming, an optimization model for DES was established....