Ministry of industry association [2011] no. 451 notice made clear that there are still many problems in the information security management of China's industrial control system. It is mainly because the concern on the information security of industrial control system is not enough. The management system...

The code structure of large-scale software is complex, so it is difficult to analyze and debug errors. Software code reliability has attracted wide attention. In order to improve the quality of the code, this paper summarizes the common abnormal patterns in large-scale software, and designs the framework...

In this paper, considering the needs of educational network resource search, a framework of ontology based semantic search engine system is designed based on open source technology Hadoop and Nutch. Several key technologies related to semantic retrieval based on tology are explored, including the construction...

Surface roughness of parts is an important index for the quality of processing. An accurate and efficient model for surface roughness prediction can provide a reliable constraint or objective function for the processing parameter optimization. In the part design and actual processing, the surface roughness...

The paper first elaborate the composition principle of the electro-optic obscuring system of high-pressure water mist. Then, the design principle of the system's core component - pulsed eddy current nozzle is introduced. Finally, the obscuring effect of the system is verified through the infrared thermal...

To study the influence of selecting different airport sites on the urban heat island effect, we retrieved the land surface temperature (LST) of Dalian's main urban area using the thermal infrared band from the Landsat-8 data and graded thermal field. The results show that the Dalian Zhou Shuizi International...

A RFID (Radio Frequency Identification) security middleware model based on the traditional RFID system is proposed in this paper. The elliptic curve digital signature module in the model has the characteristics of guaranteeing the effectiveness and non-tampering of the original information. By analyzing...

In this paper some Unmanned Aerial Vehicles are equipped with a fixed camera to conduct surveillance operations, the route planning method are presented using neural network method. The simulation results are presented to demonstrate the performance and computational efficiency of the method. As neutral...

The (La0.8Sr0.2)2FeNiO6- (LSFN) oxide powder with double-perovskite structure was prepared by using polymeric precursor method. The oxide powder and LSFN sensing electrode (LSFN-SE) were characterized by X-ray diffraction (XRD) and environmental scanning electron microscopy (ESEM). The NO sensing property...

This paper investigates the influence of swinging antennas on co-site interference cancellation system (CICS) and the improved interference cancellation method for keeping the effective interference cancellation as the antennas swing. The interference signal model coupled from transmitter to receiver...

From the study of the CPV Important components based on the Condenser design of Fresnel lens, through extracting the solar spectral data, modeling condenser materials, simulating condenser of sunlight by optical simulation software, and also simulation light path of sunlight, this thesis will complete...

The synergy of complex systems refers to the coherence between constituent elements, which represents the nature of the coordination and cooperation of the elements in overall development process. By analyzing it by the BP model, the operational capability of the weapon can be assessed more accurately....

Three degrees of freedom (3-DOF) parallel mechanism (PM) with limbs of embedding structures is a PM that each limb exists common axis. This is an asymmetrical PM with a full cylinder workspace and it has two translational DOFs and one rotational DOF. In order to research the kinematics characteristic...

In order to fabricate the micro patterns cavities with micro size on 304 stainless steel, electrochemical micromachining (EMM) with laser masking based on surface modification by fiber laser masking was studied, and a device of laser-assisted EMM with the special pulse power supply was developed to achieve...

The current vehicle rotating platform uses the electric slip ring to realize the communication and power supply function between the platform equipment and the chassis equipment. With High-definition video, radar and other equipment installed in the vehicle system, on-board rotating platform to transmit...

Considering the sparsity characteristic of speech signal in time-frequency domain and the non-linear model ability of deep neural network, an improved sparse non-negative matrix factorization based speech enhancement method is presented in this paper. Deep neural network is employed to learn the sparse...

As a result of the army equipped with a power supply vehicle lack of power parameter testing equipment at the present time, in order to ensure that the double frequency unit after overhaul can meet the factory requirements, a double frequency unit of power supply electrical performance tester was developed....

In the modern auto parts manufacturing, the production of hub is a very important branch. In order to improve the beauty of the wheel hub and corrosion resistance, the finished wheel hub needs to be sprayed. In this paper, the automatic spraying system of the hub is designed by applying the existing...

Elliptic crank is able to generate elliptic curve of the planet mechanism, with elliptic crank as the driven crank of slider-crank mechanism is equal to the mechanism which has a variable length and a variable speed along the elliptical moving crank, which changed the kinematic characteristics of the...

The manual pulse generator is the main part of CNC machine tool, the manual mode of the Fanuc CNC milling machine is noneffective, and the working principle and fault analysis are discussed to provide reference for the similar failure of the actual machine.

To enhance the output performance of automobile exhaust thermoelectric hybrid power, all the components such as engine, automobile exhaust thermoelectric generator (AETEG), DC/DC converter and batteries were modelled with ADVISOR, the maximum power point tracking (MPPT) method of AETEG combining perturb...

The fault phenomenon tool real machining center for tool in the tool magazine was studied when using the PLC method, the electric control system for fault diagnosis, solve the problems of fault in tool changing machining center. As a result, the efficiency of dealing with failures is improved. This method...

The research of beam resonator fabrication technology has been done by using reactive ion etching, wet chemical etching and self-etch-stop etching. The difficulties of hollowing out resonator have been solved. The butterfly-shaped beam resonator of resonant pressure sensor is obtained, the other measurement...

This paper introduces the situational awareness theory and classical model, and proposed a network security situation awareness model based on multi-source information fusion. The model makes a situation awareness through the collection, extraction, pretreatment, normalization and situation calculation...

The rapid development in computer and network technology has brought forth a tremendous increase in cyber crime. To combat cyber crimes, electronic evidence can provide a clue, and even be the evidence to prove the case, but currently electronic evidence usually have been questioned in the courts because...

Aimed at the influence of all kinds of artificial jamming on communication signals in complex electromagnetic conditions, the technology of communication signal separation based on FastICA algorithm is proposed. The technology can separate the communication signal of interest from the receiver mixed...

The thesis analyses the problems in current equipment training system and build up an integrated training management platform of resource, organization, teaching, training, learning and performance measurement. The platform deals with courseware, e-textbook, teaching plan, question bank, virtual simulation...

With the development of optical fiber communication network eavesdropping technology, its security is facing new challenges in recent years. Some of the optical fiber communication eavesdropping technology cannot be detected with its hidden features, so it is necessary to study optical fiber tapping...

This paper analyzes the business characteristics of the National Engineering Library and the problems on management information. Its work process is analyzed and optimized, and thus is put forward both the system's functional requirements and non-functional requirements. According to the demand analysis,...

The binarization of Tibetan ancient document image have always been the focus of research, in this paper, an automatic block local binarization method based on Lab color space is proposed for stained Tibetan ancient document image. Firstly, weaken and eliminate the influence of the stains using the location...

To handle walking safety problems for mobile phone addicts, a walking security alarm system based on android mobile platform is designed. According to movement features when someone is walking and when he falls down, this paper proposes a step counting algorithm and a fall-down detection algorithm based...

To correct the trapezoidal distortion of images taken by mobile phone on the smartphone platform, a real-time correction method for image distortion based on correction matrix is proposed. First, the correction matrix data in various cases is calculated and stored in the database based on the control...

With the development of artificial intelligence, artificial neural network algorithm models that simulate the working pattern of human brain neurons have attracted more and more attention. The ability of artificial neural network on feature extraction and classification, has been widely used in image...

In interval-valued information system, the rough entropy to Multi granularity rough set is presented , the quality of rough set is described by dominance relation, Condition of rough entropy is raised to discuss the nature, the example is used to analysis specific.

Although difference of convex model has attracted many research efforts due to its superior performance for image processing, no attention has focused on robust data fidelity for this model. In this paper, we propose a novel model, which combines the and fidelity terms with a weighted difference of anisotropic...

Code recommendation is becoming more and more important for software development because increasing numbers of existing libraries are being utilized by developers and code recommendation tools offer great aids to developers in quickly finding suitable APIs to use. There have been many studies on recommending...

In the paper, we describe a Cross Language Information Retrieval System (CLIR), which allows user input English queries and search Chinese documents. We also explore the solution for online search engine, which can meet commercial requirements.

With the progress of science and technology, Internet of things (IoT) technology is developing rapidly. At the same time, pump equipment is widely used in many fields. The development status and trends of the Internet of things (IoT), current situation of pump equipment monitoring, and application of...

Taobao is the biggest platform for C2C e-commerce in China. Based on the data of expresses from taobao.com, this paper conducts a statistical analysis about the C2C express in China under 31 provinces, three economic zones and eight economic regions, respectively. C2C expresses related with each area...

In simultaneous location and mapping of mobile robots, the traditional FastSLAM method has the problem of sampling particles degeneration and shortage and the problem of needing a large number of particles for positioning accuracy. To solve these problems, this paper studies a FastSLAM method based on...

Smart substation is an intelligent substation which adopts advanced, reliable and ecofriendly techniques. It can finish the basic functions of collection, measure, protection and test automatically, meanwhile, advanced capabilities like automatic control, intelligent adjustment and online decision analysis...

This paper studies the application of compressed sensing theory in speech signal sampling and reconstruction of speech signals. According to the sparsity of speech signals in the discrete cosine transform basis (DCT), we propose a speech compressed sensing (CS) system based on DCT domain which realizes...

Aiming at the background updating slow in Gaussian mixture model in abrupt illumination, 2-D entropy is used to judge the mutation of light, thus changing the learning rate so as to speed up the background modeling. The experimental results show that the method can make the background more accurate in...

Aiming at analyzing the main factors which may influence the population density, this paper establishes a gray correlation analysis method to determine the main influencing factors for population density of Wuhan City according to the data in the statistical yearbook of Wuhan City. The result shows that...

Because of the traditional genetic algorithm is difficult to consider both the quality of solution and the efficiency of convergence in solving the problem of constrained optimization in workshop scheduling problem. In this paper, we use the method of working procedure coding to generate feasible scheduling...

A biconvex lens was designed and fabricated by embedding electromagnetic-induction materials (cage-shaped granules of conductor materials, CGC) in polymethyl methacrylate (PMMA). The CGC material has a refractive index of 1.504 at 35 GHz. The spatial resolution and depth of focus of the active millimeter...

With the development of language teaching, multimedia technology has been used in senior English teaching, which provides teachers a convenient way to teach. Compared with traditional teaching, multimedia technology has got a great improvement in teaching mode, teaching content and teaching methods....

Using 20 listed companies of big data industry in Guizhou Province as samples, this paper uses three stage DEA method to evaluate the financing efficiency of big data industry in Guizhou Province. The evaluation results based on three stage DEA show that the average of pure technology efficiency is 0.92,...

This Intelligent video surveillance has been widely used in video surveillance environment, the traditional intelligent video surveillance algorithm has problem is that it is mainly for the static environment. It is can't detect the moving object in moving doom.So a new algorithm is proposed to expand...

This paper studied the problem of risk forecast for the P2P network loan, and established a GM (1,1) grey forecasting model to forecast the risk. In this model, the least square method is used for data fitting, and an empirical analysis is given by using the statistical data in three kinds of companies'...

Reflection times is the key problem of the reflective optical fiber hydrogen sensor, which directly affects the quality of the sensor sensitivity. In this paper, multiple reflections for reflective optical fiber hydrogen sensor were investigated. Multiple reflection scheme was proposed, the probe structure...

This paper designs a grid-connected photovoltaic micro-inverter based on double DSC control strategy. According to the characteristics of double DSC control strategy, we make appropriate innovation and improvements on circuit topology. In the part of DC/DC module isolation transformer is used. The two...

This paper applies variable dimension fractal model to study the characteristics of the spatial distribution of the landslide hazards in the study area from Badong county to Zigui county in TGP reservoir region. The result shows that the spatial distribution of landslides has the characteristics of variable...

The on-line monitoring of time synchronization system in Smart Substation is the key point to solve the time traceability of smart substation. Analyze current status of time synchronization in substation time synchronization system. Point out the defects of low time precision, abnormal synchronization...

In this paper, we present the 3D reconstruction of ancient structures using 3D laser scanning technology, which is used to obtain the point cloud data of the ancient structures, and the method of the 3D modeling are constructed by using the point cloud data. This paper describes the use of terrestrial...

This paper proposes a new pressure sensor using Havar alloy film as the sensing diaphragm, which has higher strength and toughness, better corrosion resistance and magnetic resistance as compared to traditional films. 2D distribution graphs of stress and strain of the diaphragm under a given pressure...

Flywheel energy storage rotor generates strong centrifugal inertia force at high speed rotating state , and the centrifugal force causes the internal composite flywheel rotor stress. If the stress exceeds the ultimate strength of composite flywheel rotor, it will be destroyed.Using the double ring flywheel...

On the basis of studying the characteristics of network security incidents and the methods of correlation analysis. The paper defines the network security event attribute similarity algorithm. A network event correlation analysis method based on attribute similarity is proposed, and the detailed description...

In this paper, the deformation monitoring problem of subway pit construction is studied. And the feasibility of close-range photogrammetry method in foundation pit monitoring is studied.Through the simulation experiment to get the parameter index.This paper is based on the Shijiazhuang Metro Line 3 XI...

In recent years, the concept of unmanned technology and automatic monitoring based on AI has gradually become a hotspot,which all need the equipment to identify the target in video image quickly and timely.This paper designs a set of video moving target recognition and tracking system based on embedded...

Three kinds of phase modulation methods adopted in the rotation rate sensor based on microsphere resonator are investigated. The performance of these modulation methods were compared and analyzed. As a result, sinusoidal wave modulation was employed and the sidebands demodulation has been realized in...

To calibrate three-axis magnetic compass in complex conditions, an ellipsoid fitting algorithm is proposed in this paper, which is based on genetic algorithm searching for intersecting plane. First, by intersecting ellipsoid surface with a plane equation covering the whole space, the corresponding elliptic...

With continuous development of high power equipment in industrial controlling area, the power levels of power semiconductor devices are also continuously increasing, and it brings many challenges to the production and testing of power semiconductor manufacturers. In this paper, the power technology at...

In high temperature harsh environments, The real-time dynamic measurements of pressure sensors are unable to carry out due to its own limitation. Thus, SOI material and MEMS processing technology are used to solve these problems. Mechanical properties stability and reliability of the sensor structure...

The SOI pressure sensor is a new high temperature pressure sensor made of SOI materials. The sensitivity of the SOI pressure sensor is determined by the design of the strain membrane and the pressure sensitive resistance. In this paper, the optimal size and thickness of the strain membrane, and the position...

The distributed OTDR measuring system based on correlation degree spectrum of UWFBGs is proposed. The traditional OTDR system uses a white light source to reduce the noise signal induced by the interference from multiple reflections between UWFBGs (reflectivity of each to be 0.1%), in addition we used...

Surface temperature is an important parameter commonly used in thermal infrared remote sensing. Precise measurement of temperature is one of basic tasks in ground parameter acquisition. A remote high precision temperature acquisition system based on GPRS is presented in this paper, which consists of...

An Interleaved Shell-Electrode Detector -ISED (Chinese patent #zl201721077852.6), based on the Closed Shell-Electrode Detector (CSED), is proposed for the improvement of charge collection efficiency by reducing the dead region. The novel design concept of ISED will be discussed in detail. Full 3D simulations...

In order to improve the radiation resistance of semiconductor detector, 3D trench electrode Si detector structures have been proposed by BNL at the end of 2009. In this paper, we propose a 3D trench electrode Si detector with adjustable central collection electrode, which integrates advantages of cylindrical...

We propose a novel electrode structure that reduces the detector capacitance by employing a metal electrode with much reduced area as compared to the detector sensitive area. We found that by doing so, the full depletion voltage of the detector will increase due to the added lateral depletion between...

The aim of this paper is to reduce the detector electronic noises by reducing the detector capacitance. We designed a new type of electrode that uses a geometrical shape different from conventional detector effective surface area. Main detector electric characteristics, including electric field, electric...

Therefore silicon semiconductor detectors commonly used as radiation detector. In order to improve charge collection efficiency, an Open-Shell Electrode Detector, namely OSED (Chinese Patent #ZL201710732524.3) which is based on the Closed Shell-Electrode Detector (CSED), is proposed. The electrical characteristic...

In order to solve the problem of precision degrading caused by the different gains of three axes in six degree of freedom electromagnetic tracking system, the model of anisotropic parameters was introduced, based on magnetic dipole model. An improved arithmetic was proposed to calculate the location...

The structural and electronic properties of BeZnO alloys were investigated by DFT+U method, the Uo,p = 10.2eV for O 2p and UZn,d = 1.4eV for Zn 3d were obtained as the Hubbard U values, using this U values the calculated band-gaps of ZnO and BeO are well consistent with the experimental values.The lattice...

By using congruence and Legendre Symbol, it can be proved that elliptic curve has only one integer point: