An evaluation method on scientific and technical journals based on principal component analysis is applied to deal with the relevance between various indices of 17 mathematical core journals. In order to choose index of quantitative evaluation of domestic mathematics journals which can provide a quantitative...

The problem of data security is one of the main problems plaguing the development of cloud computing, in view of the current cloud computing user data safety storage applications demand increase, need to greatly improve the data read-write efficiency problems, put forward the use of symmetric encryption...

This thesis takes researches on Network Intrusion Detection Based On Cluster Analysis And Multiple Core Set. The distributed immune intrusion detection system and the packet marking theory are used to find out the network data features of the real-time analyses; and the immune intrusion detection system...

The system of urban water supply network is the important lifeline project of the city. With the continuous development of social economy, people are no longer satisfied withwater supply requirements, but to put forward higher requirements for the safety, reliability and economy of the water supply....

Parameter identification in heat conduction problems is an ill-posed problem in the sense of Hadamard, this means that small errors in the measurement may cause very large errors in the numerical result. In this paper, a regularization method for inverse problem of determination of unknown parameter...

In order to improve the ability of BP neural network to fit complex functions, we improve the structure of the BP neural network and optimize the weights and thresholds of structure of the BP neural network based on genetic algorithm, then, training the BP neural network model to improve its capability,...

A large number of dependable embedded systems have stringent real-time requirements, which cause real-time verification in modeling stage is desired. Event-B is a formal method used for system-level modeling and analysis, which is suitable for modeling high dependable software. Modeling real-time system...

This paper for the issue of Satellite Information Application chain input task describing and modeling, analyzes the basic process about tasks arising, And this paper will be divided into four satellite missions arrival process typically. Since the law has for mission to reach the general characteristics....

What the most important in a virtual test environment is the realism of a scene. This paper focuses on how to use some scene models set up by 3DS MAX in CarMaker which is simulation software for vehicle. Because CarMaker itself only can build some certain road models and some simple scene parameters,...

A stochastic conjugate gradient multi-modulus algorithm based on global artificial fish swarm and genetic optimization DNA encoding sequences(GAFS-GDNA- SMMA) is proposed to solve the high computational loads, low convergence rate, and large mean square error(MSE) of the multi-modulus blind equalization...

Aiming at the state transition quick extraction problem for sequential logic chip,has desined a state transition graph extraction algorithm based on ant colony algorithm model, besides that, the ant colony algorithm model has been introduced in details, and according to the characteristics of the graph...

Using incremental calculation methods on materialized views maintenance can be beneficial for quick access to views, query optimization and so on in the digital library. This paper presents a new method of view incremental calculation named PCA. And this method can efficiently compensate for the error...

We present a scalable method to implement the construction of neighbor list in molecular dynamic simulations on multi-core platforms. Our methodology is based on the OpenMP programming model. Our method doesn’t divide the whole of simulation region into cells. Each thread builds and maintains a few sliding...

More and more enterprises have their own private cloud computing center or the data center to optimize operation and save money. In order to protect sensitive company data, a secure and efficient certificate less tripartite key agreement protocols was introduced into the authentication of the enterprise...

It is critically important for drug development and clinical safety to identify and assess drug-drug interactions (DDIs) early and accurately. In addition to in vitro laboratory studies, in silico methods exist that may supplement the screening and detection of DDIs in large-scale databases. Here we...

Put forward a DDoS (Distributed Deny of Service) attack detection algorithm based on IP entropy model. Through the establishment of destination IP Entropy model, setting flow and entropy threshold with membership function, checking conditions of DDoS attacks step by step. The experimental results show...

To efficiently make use of the temperature information in near-infrared (NIR) spectra, a new hybrid algorithm named as WP-WNPLS is proposed to improve the prediction ability of partial least square (PLS) based regression model. In WP-WNPLS, the discrete wavelet packet transform (DWPT) was firstly applied...

The statics mechanic model of the casing-cement-formation is established in this paper. Effects of formation and cement characteristics on casing strength are studied under injection-production condition. The examples show that the maximum stress occurs in the internal wall of the casing, along the orientation...

With the continuous development of sensor technology, the sensor has been widely used in modern war. More and more information makes the information fusion has become a research focus in the future battlefield in computer field. In this paper, first of all, we studied the current variety of data association...

According to the linear elastic fracture mechanics and the virtual work principle, the elemental stiffness matrix of the diagonally cracked RC beam is derived, and the frequencies and modes of the diagonally cracked beam are obtained. The experiment is executed to verify the elemental stiffness matrix....

In order to investigate effects of impeller blades on performance in mixed -flow pump, using unstructured tetrahedral mesh and SIMPLE algorithm, the simulation of three-dimensional flow inside a mixed-flow pump were done in Fluent. Adopting the time-averaged continuity equation, N-S equation and RNG...

Considering the deficiency in milling process parameters selection in the domestic. Based on the modeling of dynamic milling force and the calculate of chatter stability limits. Realizing high speed milling regeneration type chatter simulation algorithm with Matlab development tools. Through the modal...

This paper presented an application of Adaptive Mutation Particle Swarm Optimization (AMPSO) in optimal allocation of Distributed Generation (DG) in distribution power networks. The multiple-objective function to be optimized included two objectives: real power loss and total voltage deviation. Through...

In order to broaden the sound absorption bandwidth of single-leaf microperforated panel(MPP),The structure of MPP with partitioned cavity is introduced and its sound absorption performance is studied by impedance tube experiment. Results show that the MPP with partitioned cavity has two sound absorption...

There are many algorithms of attribute reduction based on discernibility matrix, where the element of the discernibility matrix is used as heuristic information. But there are few algebra methods about attribute reduction based on discernibility matrix. In this paper, we proposed an algorithm of attribute...

In this paper domain ontology model of cloud manufacturing service and suitable semantic description scheme of manufacturing service was study, the method of dynamic perception and effectively cognition of the manufacturing resources was study.To solve the integration, sharing, virtual key problems in...

This paper proposes a method based on information entropy and support vector machine to predict chatter in milling, it uses multi-scale permutation entropy and wavelet packet energy entropy as the milling chatter premonition features, we select parameters of these identifying features by experimental...

In view of the current issue that the shearer in coal mine fully mechanized working face can't accurate automatic identification of coal rock interface, the method of using the shearer motor working parameters to reflect the hardness of coal and rock is put forward. The stress of roller cutter pick,...

The machining accuracy of conductive is one of the important parameters which can affect the quality in the process of electrochemical ginding. In fact, there are many deviation in the machining process, and used the theory mathematical model, the two parts make a combination, we can take a model of...

Cloud Manufacturing is developed in the cloud computing, which is based on the idea of "Made in service" recently. Cloud manufacturing mode connect all sorts of manufacturing resources and capability together and form standard manufacturing services which customers can obtain according to their demand...

In the paper based on diffusion theory the acid rain erosion-carbonization model was established. The model parameters were analyzed and the model was solved by MATLAB software. At same time the failure criteria of existing concrete structure in acid rain area was developed and the life prediction method...

The fatigue performances of two types of the automotive frame steel (AFS) include WL700 and WL510 are investigated. In order to take the thickness effect into account, two series of WL510 samples with 6mm and 8mm thickness respectively are selected. The fatigue strengths are calculated by one and two...

This paper proposes a solution based on reinforcement learning in the soccer dribbling tasks of RoboCup. The dribbler spares no efforts to keep possession of the ball from beginning to end while adversaries attempt to gain possession. In this paper, the dribbler uses SARSA possession algorithm and the...

The simulation of spherical mechanical seal is carried out with ANSYS finite element method, and the influence of sea water pressure, shaft speed and other factors on the spherical mechanical seal performance discussed. The study shows that local contact situation of the spherical mechanical seal is...

By means of the extended mapping method, the traveling wave solution for the variable nonlinear Klein-Gordon equation is investigated, which is obtained in terms of the Jacobi elliptic functions. The hyperbolic function solutions and trigonal solutions are also obtained. The numerical simulations are...

Constructing integrable systems is a significant direction in soliton theory. In this paper, a new system of nonlinear differential-difference equations with variable coefficients is derived by introducing some derivable functions to the corresponding discrete spectral problems. In order to give some...

In this paper, the exp-function method is generalized to solve a first-order nonlinear differential equation with forth-degree nonlinear term. As a result, three new exact solutions with free parameters are obtained, the first two of which include generalized hyperbolic function solutions and generalized...

In view of the Economic Class of two-dimensional partial differential equation, a two dimensional scale function was chosen and was applied to the wavelet collocation method. Simultaneously, the two dimensional scaling basis function was proved satisfy the interpolate property. And according to two dimensional...

The XFEM makes research within a standard finite element framework and needs not mesh repartition to geometric and physical interface, so it reserves all merits of the conventional finite element method and it is the most effective numerical method to solve discontinuous dynamic problems so far. The...

Multi-depot vehicle routing problem is a NP-hard combinatorial optimization problem. In this paper, we proposed an improved genetic algorithm (GA), which combined GA with fitness-scaling and local search. The experiments compared the proposed approach with standard GA, simulated annealing, Tabu search,...

In order to simplify assembly sequences, reduce assembly difficulty and costs, and guide product assembling process, a sub-assembly identification algorithm is presented and applied to assembly sequence planning problems in the field of intelligent planning. It is used to identify sub-assemblies in the...

In order to solve the assembly sequence planning problem of fixtures, an ant colony algorithm is presented according to the principle that an assembly can be assembled if it can be disassembled. The disassembly constraint relations among the parts in a fixture are used to construct an integrated disassembly...

In digital product assembly planning, different assembly process will direct affect the choice of assembly tools and fixtures, assembly efficiency and assembly costs. The application of a particle swarm algorithm to assembly process planning problem is studied in order to achieve the shortest completion...

Ant Colony Algorithm has certain advantages in solving Capacitated Vehicle Routing Problem (CVRP), but there are still easy to fall into local optimum, the search speed etc. To overcome these problems this paper presents an adaptive hybrid Ant colony optimization algorithm for solving Capacitated Vehicle...

A DNA genetic optimization bat algorithm based fractionally spaced multi-modulus blind equalization algorithm (DNA-GBA-FS-MMA) is proposed. This proposed algorithm uses fractionally spaced equalizer(FSE) with ability to oversample to input signals to get more channel information and compensate for channel...

In this paper,According to the shortages of the NSGA - II algorithm in terms of the simulated binary crossover (SBX) operator , the speed of convergence and the diversity performance,The reverse learning mechanism (RLM) is applied to the initialization and evolutionary process of the NSGA-II,And introducing...

An H1-Galerkin mixed finite element method (H1MFEM) is proposed and analyzed for the fourth-order nonlinear Rosenau-Burgers equation. By introducing three auxiliary variables, the first-order system of four equations is formulated. The fully discrete scheme is studied for problem and optimal a priori...

According to the characteristics of constrained mobile devices, an improved Surf feature extraction and matching algorithm is proposed. First, dynamic pyramid is established in order to meet the real-time requirements; then reducing redundant feature points and strengthening the feature points of big...

A double validated method of browser and server based on JavaScript language is be proposed in this paper. It relates to the development field of Web application system based on Java EE, in order to solve the validation rules are not consistent of browser and server. It includes defining validation rules...

The data fusion method combined improved K-means clustering algorithm with D-S evidence theory was used for vibration fault data fusion of aero-engine in this paper. The later calculated amount was reduced by the improved K-means clustering algorithm. On the basis of the improved K-means clustering algorithm,...

Aiming at deficiencies of previous researches on consensus emergency model, this paper provides a new consensus emergency model. In the first place, we extract individual’s influence power as its main character based on social psychology. Furthermore, the behavior mechanism of individual is constructed....

According to interaction between mathematics modeling and computer, example the shortest path problem signed directed graph by principle of dynamic planning & introduction of the dynamic programming.

In view of the present economic operation index data control is insufficient, lack of effective analysis and calculation method, and the unity of the information release platform. In this paper, the solid-liquid two-phase slurry pipeline transmission performance indicators related to economic factors...

The methord of underwater shield string is put forward in 2000 HP.The quantitative design and calculation are finished with no clear specification requirement and calculation method. By the calculation and analysis of the viscous resistance of the wet surface,it shows that the methord can not only satisfy...

It is difficult to review vast amounts of examination surveillance videos recently. In this paper, an algorithm for detecting suspected cheating behavior in examination surveillance video is proposed to solve this problem. The algorithm is based on adjacent frame difference algorithm, optical flow method...

In view of the current international security situation, this paper proposed a new steganography algorithm based on MP3 audio format aimed at solving solve the problem of network security communication. This algorithm combined pre-type algorithm and inlaid-type algorithm of MP3 audio steganography .Pre-type...

Focused on the optimization of lunar ascent nominal trajectory, an algorithm based on the unscented Kalman filter (UKF) parameter estimation is proposed in this paper. The optimization of lunar ascent nominal trajectory problem requiring minimum fuel is formulated as a two-point boundary value problem...

PrefixSpan is an important algorithm for sequential pattern mining algorithm, but it’s projected database cost more redundant memory and scan-time, so this paper present an improved PrefixSpan algorithm(IPS) which is based on PrefixSpan. IPS decreases the redundant memory and scan-time by abnegating...

Some problems, such as slow speed, inefficient and excessive labour, etc, may exist if the quality detection is carried out artificially in the volume-production of nut collars. Therefore, the machine vision is introduced into the dynamic inspection system, which can automatically measure the inside...

In this paper, we analyzed the mechanism of coagulation sedimentation process in water treatment and proposed a mechanism model according to the population balances and the characteristics of the system. The model consists of mixing, flocculation and sedimentation, and reflects the relationship of original...

Fair resource is a key building block of any shared computing system. Recently fair division theory has emerged as a promising approach for the allocation of multiple computational resources among users. While in reality users are not all present in the system simultaneously. Dominant Resource Fairness(DRF)...

Fair resource is a key building block of any shared computing system. Recently fair division theory has emerged as a promising approach for the allocation of multiple computational resources among users. We have introduced Contribution Resource Fairness (CRF), a fair sharing model that generalizes max-min...

Fair resource is a key building block of any shared computing system. Recently fair division theory has emerged as a promising approach for the allocation of multiple computational resources among users. While in reality users are not all present in the system simultaneously. Dominant Resource Fairness(DRF)...

City land use is a very complex system, and its development is influenced by many factors. The city land utilization structure will directly affect the development of the city. Information theory can reflect the order and structure of land use, which provides decision support for the city land utilization...

To resolve the problem of a little bit low speed the typical image feature extraction algorithm SURF ( speeded up robust feature ) has , in the paper we do an in-depth analysis on the algorithm properties in regard to its running time , instruction type , memory access , hot spots , and etc. On this...

At present, GOCI satellite is the only means to monitor the drift of sea ice in a wide range. The high temporal resolution makes it fit for monitoring Marine phenomenon and process in time series. It improves the possibility of obtaining a high quality image in a short period of time. GOCI satellite...

In this paper, mathematical physics equations Bessel equation solving means, for the critical radius cylindrical uranium blocks were theoretically derived and obtained relevant results. Uranium radioactive material, there are two forms of exercise neutrons, neutron multiplication neutron diffusion and...

The dissertation briefly expounded the definition and mathematical analysis of a periodic function. Described the program development process of simulating periodic function curve and associated knowledge by computer language. It also given in detail the principle of production and flow chart. Introduced...

This paper focuses on pedestrian detection of moving objects, and then tracking the detected objects. The pedestrian detection is performed using an algorithm based on a type of background subtraction technique. This technique not only uses a median-based approach for initial background estimation but...

Part-of-speech (POS) tagging is the basic and primary analysis step in many natural language processing (NLP) applications. For English, it is often considered a solved problem. There are well established approaches, and the accuracy is around 97% with sufficient domain-specific training data. However,...

Gm(1,1) model is the simplest and also the most widely used grey prediction model. However, the manual computation cost is so very large, and cooperation of related calculation software is relatively complicated, so the performability is not that high. In cases of utilizing Java language to compile Gm(1,1)...

Despite of the development of face recognition technology; face recognition rate is not high, which brings some inconvenience in our application. This paper carry on a simple introduction of PCA+AdaBoostalgorithm and PCA+LDA algorithm and makes a simple comparison at the end. PCA+AdaBoost algorithm and...

In a cooperative air combat, the whole command and control system (CCS) may lose control if the lead plane in the middle of the fleet is damaged or fails. In order to solve this problem, this article simulates a dynamic and global optimum CCS for the cooperative air combat with the particle swarm optimization...

In order to neutralize the disadvantages of UKF algorithm applied in discontinuous terrain based navigation, this study offers an updated TERCOM/ICCP+UKF terrain matching algorithms combination. First, the theoretical and practical limitations of UKF-based underwater terrain matching algorithm adopted...

This article describes the bond length distribution of the Ga1-xlnxNyAs1-y quaternary alloy which has attracted much attention in recent years for its potential use in fabricating long wavelength optoelectronic devices, and propose a statistical model, which calculates the average bond lengths in as-grown...

Based on the Lomakin-Schiebe formula and by means of nonlinear weighted maximum likelihood estimate (NWMLE), the calibration curve fitting methods for atomic emission spectrum (AES) analysis were strictly deduced and the regression equations on the curve parameters were obtained. All the parameters of...

Aiming to improve the precision of vehicle height control for hydro-pneumatic suspension system, having deeply considered the nonlinear factors existing in the lifting and lowering process, we derived the equations of hydraulic pressure in the cylinder and air pressure gradient in the accumulator. Based...

A three dimensional rigid-flexible coupled vehicle system dynamics model was built to simulate the vibration response of carbody, and the short wave of track spectrum was considered during simulation. Before the simulation, the finite element model (FEM) and substructure modal analysis of carbody was...

The performance of look-up table (LUT) predistortion system is analyzed and simulated, and three conclusions are gotten. The first is the system SNR increases with the increasing of the LUT length, and if the length of LUT increases doublely the SNR increases at least 6 dB. And the second is the system...

Some doubt has been cast upon the predistortion system applying indirect learning structure (IDLS). In this paper, using the polynomial model for the predistorter (PD), theoretical investigation and simulation on the predistortion system performance basing on IDLS is put out. The result shows that the...

By using the relevant theory of Markov chain, the actual driving data are compressed and reconstructed, and then the city road driving cycle is constructed based on characteristic parameters such as velocity, acceleration and gradient. In the process of constructing the driving cycle, corresponding state...

With the rapid development of network, information technology has provided an unprecedented amount of information resources. It has also led to the problem of information overload. Electronic commerce personalized recommender systems represent services that aim at predicting a customer’s interest on...

In April 2020, Atlantis Press was alerted to fake proceedings articles hosted on our platform. These articles, mostly in computer science and engineering, were generated by the SCIgen computer program and were all published between 2006-2018. Immediately after receiving the alert, Atlantis Press initiated...

In this paper, phosphgypsumwas processed by the method of microwave heating, and the variation of the temperature curve of phosphgypsumwas studied by means of software MATLAB, and their causes was also analyzed. The results show that in the early stages of heating phosphgypsum, the relationship between...

Nutch, Solr and Hadoop, three of them are open source applications, which Nutch is a superb web crawler, Hadoop is a cloud platform and Solr can use crawled data and offer word class searching. Nutch only provides one mechanism which segments Chinese sentences into some single characters so that Chinese...

The mathematical model of a vertical launching device was established by simplifying its physical model. Through the method of solving Navier-Stokes equation , the complex internal flow of the exhaust was simulated when the missile keep still in the Vertical Launching System, and the changes of the various...

Evaluation of inspection features mostly depends on manual operation, and thus lead to time-consumed and error prone. A new method of feature evaluation based on DMIS is put forward in this paper. The typical types of features and evaluations are summarized. The process of feature evaluation based on...

In recent decades, a lot of quality and design problems of urban footbridge appear, these bridge problems often causes traffic jams and different traffic accidents, more serious bridge problem will cause certain people casualties. This paper uses universal finite element software ANSYS to establish three-dimensional...

Wireless sensor network target tracking node selection has a significant impact on the life cycle of wireless sensor networks, therefore this paper proposes a tracking node selection algorithm with tracking quality assurance. First, analyzes three elements wich have impact on residual energy of node...

A new vibration device of process electrode has been provided in the paper, which achieves the aim of developing process state and improving process speed. Set out from improving system process efficiency and process quality, it analyses the characteristics of EDM and make sure appropriate parameter...

On the basis of cloud model, proposed the intelligence firefly algorithm, analyzes the position, strengths and weakness in objective function’s quantization individuals of solving problems. We propose the applications of improved firefly algorithm in cloud computing task scheduling. Starts with the need...

This paper based on the Grey Theory and Markov Theory, the Two Order Grey Markov Model(GMM(2,1)) is established. The modeling process are analyzed firstly, instead of using only one theory model or only using GM(1,1) in the past, this article also through a real instance comparing GM(1, 1) ,GM (2, 1)...

Support vector machine is a classification algorithm emerged in recent years and has been successfully applied to many areas, and least squares support vector machine is a technology developed from the traditional support vector machine and has important researching significance. Firstly, this paper...

The TSP is a typical NPproblem. Therefore it is very important to the optimization for solving TSP problem. The genetic algorithm is one of ideal methods in solving it. However, the traditional genetic algorithm has the problems of slow convergence speed and local optimum. Aiming at the existing problems,...

In the artificial neural network, BP neural network is a multilayer feedforward neural network which is used widely. BP neural network uses a classic BP algorithm, and it is in accordance with the error back-propagation algorithm for learning and training. This paper first analyzes the basic idea of...

Computer simulation is a discipline which intersects operations research, mathematical statistics and computer science, and it dynamic simulates system or process by using computer. The paper studies financial institution queuing problem by using discrete event system modeling and simulation to provide...

With the rapid development of the Internet and cloud computing applications, the construction of a digital library in the cloud computing environment has been put on the agenda. Construction and management of digital libraries using cloud computing technology, can effectively utilize resources, reduce...

To solve the problem of target detection in heavy sea clutter, we make simulation study on a subspace-based clutter suppression method to improve signal to clutter ratio in the predicted target location, and thus to improve the detection performance. With the compound Gaussian model of the sea clutter,...

Ultra-short baseline system (USBL) is widely used in ocean observation as a result of small aperture size and ease install. However, the USBL has lower accuracy at a long-range. In order to increase the precision, the estimation algorithm of inserting time-delay in correlation peak is used for passive...

The voice is a kind of composite wave, timbre is different depending on the different overtones. The timbre, namely audio overtones or harmonics components, is determined by the number of the overtone. The pitch is one of the most important parameters of speech. In the process of collecting phonetic...

This paper explains and demonstrates a two-dimensional surface-scale model of the torpedo target.In this work,it makes scientific researches on characteristics of the surface-scale targets for torpedo using some sound reflection highlights distributed in two-dimensional scale with different strengths,...

Network is the basis of the army informationization construction, and security is the guarantee for the army informationization construction. The article firstly analyzes the hidden trouble of the military network and the lack of defense methods, and then introduces a new defense system of military network...

Based on the model of multibeam synthetic aperture sonar (MBSAS) and the principle of multiple subarray interferometic, a high resolution multibeam synthetic aperture interferometric imaging algorithm was proposed. Firstly, the algorithm got the target rough position via the Back-Projection (BP) algorithm...

This paper researched on the water filled pipe with elastic wall which is widely used in daily life. Considering the existing of the P-wave and S-wave in the pipe wall, the thin shell model and liquid wall model are not applicable. In this paper, the sound field in the water filled pipe with elastic...

Sonar operational range is an important tactics and technique parameter for sonar system. It is a variable number because of many factors affecting in the actual using, so it brings more complex in the test. Being analyzing the influencing factors for sonar operational range, this paper summarizes the...

In order to solve problems including the interpolation error, the distortion of phase information and the huge computational costs by using classical truncated-interpolation based back projection (BP) algorithm for multi-receiver synthetic aperture sonar (SAS), a novel BP algorithm is proposed by exploiting...

Narrow-band signal or CW pulse can be effectively detected by ALE algorithm. ALE based on LMS algorithm is widely used. The convergence speed and convergence accuracy of fixed step-size LMS algorithm is a pair of contradictions. The non-stationary data must be normalized before it is applied. The local...

This paper analyzes the mechanism of non-cavitation tone noise line-spectrum frequency of counter-rotation propeller. The mechanism is interference effect and circumferential harmonics field effect. According to the generalized acoustic analogy equation, the lift and drag which are caused by the mechanism...

When modeling sound propagation through the uppermost layers of the ocean, the presence of bubble clouds cannot be ignored. Their existence can convert a range-independent sound propagation problem into a range-dependent one. Based on available test data and within the framework of previous work, a model...

This study numerical demonstrates the principle of parameter design of the two vertical source-receiver arrays system for separation of eigenrays in shallow water multipath environment. The two arrays performed transmission and reception of acoustic pulse signal repeatedly, and use a double beamforming...

The research of UUV route planning is becoming an important topic nowadays. In this paper, stream function method coming from fluid dynamics is presented, and it is applicable in the field of local route planning research. In addition, in terms of two problems in application considering maneuver and...

Working in a passive mode, the result of instability, slow convergence and low convergence precision were easy to appear when the underwater target is located by using Kalman filtering algorithm, so an adaptive Kalman filtering algorithm based on Doppler frequency was proposed. The algorithm estimated...

Feature extraction of underwater targets and line spectrum comparison are the key of the target fusion. The changing characteristics of the ocean noise field and individual differences of receiving arrays make the line spectrum feature extraction of underwater target unstable, which leads to the target...

GACI (Generalized Adaptive Coherent Integrator) algorithm is quite effective in detecting pulse signals. We aim to improve it further and present in this paper improved GACI algorithm, called by us IGACI algorithm. In IGACI algorithm, momentum factors, more than those in GACI algorithm, are introduced...

According to the nonlinear and non-Gaussian characteristics of the traffic flow, we propose a SMC based traffic flow congestion event reconstruction framework based on traffic flow signals. The simulation states can get close to the real scene continuously along with the data assimilation model assimilates...

To solve the problem that the algorithm's slow convergence, or the lower computational efficiency, which caused by the uncertainty of the search accuracy in Doppler frequency shift space, an improved target motion analysis algorithm of bearing-line Doppler frequency shift is introduced. The filter equation...

In order to remove the salt and pepper noise and Gauss noise in an image, an improved mean filtering algorithm was presented. The algorithm statistics the non-extreme pixels in a 3x3 filtering window, if the number is smaller than five, then expends the size of filtering window to 5x5, finds out the...

Collision is of great importance in many modern sports, especially in table tennis. Research on collision should first pays attention to modeling the flight process. The paper analyzes the kinematic mechanics of collision in flight process for table tennis. It first discusses the great importance of...

In this paper, we consider the quasilinear Schr dinger equation with critical growth .We employ the perturbation approach developed by Xiangqing Liu [9] and the generalized linking approach and obtain the infinitely many geometrically distinct solutions.

Tapered interference fits can avoid the influence of keyways on the parts strength and transfer large torques. In this paper, a model was developed to study the influence of the taper on the interference fit between a hub and a shaft. Using the classic elastic plane stress theory, the exact solutions...

A driving simulator was set up for analyzing driver’s reaction time when driving on urban road, including reaction perception time, decision-making time and operation time. 28 participate drivers were recruited for the simulated driving test,Results show that the best fitting relationship between driver’s...

The exhibition logistics, which generally deal with set-up, breakdown, transport, and storage to ensure that all specific exhibition requirements are met. It is very special from traditional logistics service that its transportation distant is very short and transportation cost can almost be ignored....

The paper, for the purpose of studying the relevant factors affecting the projecting velocity and time of video scout projectile, makes an analysis on the stress condition of projecting section of scout equipment, sets up the axial movement differential equation for scout equipment, and analyzes the...

This paper describes the practical application of fuzzy mathematical algorithm in selecting the process dosage of machining with examples. The paper illustrates this method in detail from mathematical model to typical verified examples. Popularization and application of this method can provide a powerful...

The standing wave phenomenon of radial tire occurs when the vehicle speed reaches a certain critical value, this phenomenon can easily result in traffic accidents. In this paper, it completed numerical simulation analysis of standing wave border speed about 195/60R15 radial tire by use of ABAQUS finite...

In the paper, by studying the ground water heat pump calculation model, the computing platform for heat pump system was established. Through a calculation case, the fluid temperature of ground water heat pump well side and user side, heat pump power consumption and other data were analyzed by entering...

Under Sitakeboge’s Stress reaction and equilibrium recovery theory to Social distribution equilibrium failure, this paper proposes a host load balancing control model to each node based on Sitakeboge model under cloud computing. Based on CloudSim simulation software to Job scheduling algorithm under...

Evaluation of workmanship is usually used as welding quality criteria in bridge welding provisions or guidelines. There is, however, no clear relation between workmanship and welding performance. In some cases, the welding quality criteria cannot guarantee actual performance, in particular for fatigue...

In the trend of the mobile warfare, the researching moving base alignment method of vehicle mounted missile is very valuable.A new stable targeting method based on the transfer alignment of speed and attitude matching is proposed to solve the problem of a longer time alignment and a greater impact by...

The military logistics supply network is generated through computer simulation firstly. Then on the basis of the military logistic network, the survivability index and measurement model of the military logistic network is established in topology layer and business layer, providing foundation and basis...

This paper makes CNKI database the data source, baed on making 3D printing as the research theme for the literature among the years 2000—2014, do the multivariate statistical analysis on the basis of co-word analysis to reveal the status of current research in the field of domestic 3D printing, to acknowledge...

At present,traditional Space Vector Pulse Width Modulation (SVPWM ) technique has been widely used in the variable frequency speed control system,but this technique makes the system produce components of high harmonic wave at integer times of switching frequency.Thus inverter produces conducted Electromagnetic...

In order to improve the clarity of degraded image in foggy weather, an improved image defogging method based on dark-channel prior is proposed. The original algorithm is sensitive to bright region and needs more computation time. An improved algorithm is proposed based on the work of previous researchers...

In order to improve the performance of propeller the propeller efficiency optimization method under the off-designed conditions were studied. Taking the open water efficiency around the designed velocity of parent propeller as the objective function, taking the radial distribution of pitch ratio as the...

This paper simulated and analyzed a circularly polarized (CP) waveguide composite slot radiator at X -band in this paper. According to the radiation principle of the waveguide slot, a composite slot located at the broad wall of a rectangular waveguide, which included a cross-slot and a circular slot,...

Detection probability of aircraft infrared characteristic signal has an irreplaceable role on finding target. This paper mainly researches on aircraft infrared detection probability under the single background. First, target infrared radiation model is established, and then a weighted calculation method...

Since the parachute descent is more complex, the cost dropped and other tests designed to be very large simulation studies with a very large parachute design significance.Parachute canopy breathable fabric has great influence on the parachute descent, The purpose of this study is to consider the case...