This through the parametric optimization and simulation processing on the five-axis CNC machine tool with automatic programming of complex shapeparts, the complete machining technology and NC program are compiled. Automatic programming plays an important role in the machining of the impeller. In the...

We find that in the open and closed ladder systems with vacuum induced coherence, the relative phase between the probe and driving fields has an important manipulation role on the absorption property, while the incoherent pumping has a considerable effect on the phase??"dependent absorption property....

Aim to the current popularity of various sports which scoring device is inconvenient and defective scoring, this design uses 51 MCU control, battery power, digital display, input keys and wireless control module to develop a portable smart match electronic scoring device. The device has a charging indicator,...

This paper studies various possible ways of information hiding in modern computer systems, analyzes the data hiding of disk drive, and emphatically analyzes various information hiding methods of NTFS file system and the possible detection methods of various methods. Also, this paper discusses the great...

In the modern civilized society, "sex" has the endless charm to the person, using "sex" as a sale communication tool has become a familiar phenomenon. Particularly prevalent in the clothing advertising communication, using "sex" as an appeal is a customary manoeuvre innumerous clothing brand. The form...

Based on high performance composite components manufacturing process in the system of state monitoring and fault diagnosis is the key problem, established the mathematical model of a new type of second order bistable and proposes a adaptive stochastic resonance noise reduction method based on the model,...

In this paper, using the method of literature, analysis, logic analysis of Kazak traditional sports project classification comb, statistics, through to the Kazak sports projects, this paper expounds the influence of national culture. Kazak traditional sports, rich in content, specific historical background...

The paper introduces the design of the Auto-path-tracking Car. The software and hardware design method which realizes the autonomous tracing using the infrared reflective photoelectric sensors as the path recognition module is researched. The system employs Freescale HCS series 16 bit single-chip microcomputer...

In order to analyze the present situation of the development level of science and technology service industry in Shandong Province, the paper establishes a two-level index system by combining the previous research and the policy from the government, and builds an evaluation model based on factor analysis,...

In the case of Gauss distribution, the principal component analysis is equivalent to the maximum amount of information in the output signal. The theory and practice of principal component analysis (PCA) is concise, and the results coincide with the objective reality, making it widely applied in the fields...

The need to scan the database D many times when the Apriori algorithm is applied to a large database causes the I/O load overhead of the disk to increase. An improved Apriori algorithm is designed. After scanning the original database D for the first time, it generates a candidate transaction database...

In engineering design and experiment, the frequency of square wave is often measured. At present, the commonly used method is the "time sluice" method, which is to measure the frequency of square wave by measuring the jump times of the rising or descending edge of the square wave in 1s. But if the frequency...

With the rapid development of smart grid, the accurate measurement of all kinds of linear and nonlinear loads' electrical parameters is a major problem facing us in the power grid system. The main chips of the electric measuring meter are STM32 serial microprocessor core and IDT_90E36 electric energy...

In this paper, the combined method of finite element and multi-body dynamics is used to study the crankshaft assembly. The article first uses the finite element software to carry out the connecting rod the reliability of the connecting rod is proved by the state analysis. Then the regularity of crankshaft...

In view of the time-consuming and laborious disadvantages of traditional tree classification methods, the leaf identification method based on BP neural network is established in this paper. The leaves of osmanthus tree, ficus virens and ficus concinna were taken as objects. First, three leaf samples...

On the basis of accurately considering axial extension and the first-order transverse shearing, geometrically nonlinear governing equations for composite sandwich beams with elastic support, subjected to thermal loads, are formulated. By using a shooting method, the two-point boundary value problem for...

A large amount of heat is produced due to the friction between components within the bearing, resulting in an increase in temperature of the bearing system. The value of the preload directly affects the temperature of the bearing, and will affect the performance of bearing. Based on ball bearing of quasi-statics...

Being inspired by the time modulated technology, an approach for synthesizing linear thinned array with low sidelobe level (SLL) is presented. In the proposed method, the thinned array is obtained through replacing the static element weighting by the time duration of a prescribed modulation cycle, and...

In recent years, with the rising popularity of GPS, and sensor network, the behavior of the trajectory data is collected and stored in the application server. There has been lots of research achievements at present in the application scenario. The uncertainty of the eventis not completely suitable for...

The motor drive system is a servo mechanism to control the four rotor UAV (unmanned aerial vehicle) system, and it is also a key component to control the attitude and trajectory of UAV. Its performance directly affects the performance and safety of the flight control system. The working principle of...

During the flight, the aircraft often due to atmospheric turbulence caused by flight bumps, a long time will cause fatigue damage to the aircraft structure. All kinds of low altitude starting phenomenon is the main dangerous weather, which is the main dangerous weather during the takeoff and landing...

Based on the orthogonal test results, a prediction model for surface roughness of high-speed milling work-piece with ring cutter is established by regression analysis method, the regression equation and coefficient of the model are tested for significance. The model is highly significant for the prediction...

This system is a fingerprint identification system developed in the fingerprint identification module. The system uses fingerprint module to search fingers. Once fingers are searched, fingerprint images are collected immediately, and the collected images are converted to data form to send to the FPGA....

This article take the boiler water temperature controller for research object and investigate the control system based on taking the SCM a microcontroller as the core as a boiler controller, sensor technology, the basis for the system design to achieve the temperature and water level of the collection....

The clothing recommendation system can record users' personalized clothing information and select records, complete the clothing recommendation function for users, and show great potential in solving personalized recommendation. In this paper, a personalized clothing recommendation method based on SOM...

This application of CATIA to the design and simulation of complex curved ashtrays and the automatic programming and simulation of CNC machine tools require the design of software such as CATIA. The design and processing of complex parts ashtrays are taken as examples to design a complete 3D modeling...

Taking the network communication of smart home as an example, and based on the current market conditions and technical standards, this paper makes a comprehensive research on the embedded network communication module. Compared with products with simple functions and low interaction level, we propose...

Contemporary teenagers are the main group of Chinese dream. Their physical and mental health and development are related to the realization of the great rejuvenation of the Chinese nation. This article from the Chinese dream of the founders of the future - young people's physical and mental health, uses...

The population growth problem has always been a key issue. So, a scientific and accurate forecast of the population is necessary. The population data are actually time series. The previous data has a non-linear relevance to the subsequent data. In this paper, a system model based on BP algorithm for...

Based on non-uniformly cell averaged-solution reconstruction, a class of high-order accuracy and high resolution conservative difference schemes is obtained for one-dimensional nonlinear hyperbolic conservation laws in this paper. Its idea is the following. The First, the computational interval is divided...

Cloud computing technology has rapidly evolved over the last decade, offering an alternative way to store and work with large amounts of data. However data security remains an important issue particularly when using a public cloud service provider. The recent area of homomorphic cryptography allows computation...

The MATLAB image processing toolbox is applied to extract 8 classical features of leaf (including perimeter, area, roundness, complexity, elongation, sphericity, average coefficient variation, serration), and 400 leaf samples are classified respectively on BP Neural Network, Probabilistic Neural Network...

Since Philip Kotler's theory of customer delivered value has been put forward, it has been paid much attention by scholars and business scope. With the rapid development of artificial intelligent technology and the immature market, drawing on the content of the theory of customer delivered value in marketing...

A portable wireless snoring monitoring system is designed. The system consists of a slave and a host, in which the slave plays the roles of data collecting, processing and sending, and the host undertakes the functions of data reception, analysis, storage and touch display. The design can effectively...

The modeling of energy consumption of electric vehicles is of great significance for meticulous depiction and evaluation of energy saving driving control effect of electric vehicles. Compared with the mesoscopic energy consumption model based on the driving segment, the proposed model can be more accurately...

The traditional aero model DC(direct current) motor is commutated mechanically by brush and commutator, however, there is mechanical friction between the brush and commutator, which will cause noise, sparks, electromagnetic interference and many other problems. Because of the disadvantages of high manufacturing...

In recent years, due to the development of science and technology, the use of computer systems to simulate flight exercises, as well as in the digital world or the use of digital and reality in combination with the completion of flight exercises has become possible. Moreover, with the further development...

The target tracking is an important part of video target analysis, and the video target analysis also includes the processing of the image sequence, so as to explore the law of the video moving target, or to test the early warning of semantic and non semantic support in tracking system, including target...

AT89S52 microcontroller of the control system for the control of the core, combined with sensor technology, amulti control functions in one, including temperature, automatic lighting, automatic water level control, to achieve the control of fish tank.

In recent years, the construction of college students’ entrepreneurship incubation platform has been in full swing, and has become an important front for colleges and universities to implement entrepreneurship education. However, it still faces some difficulties in practice. In this paper, the colleges...

This thesis mainly discusses the fundamental theories and key technologies of digital image processing algorithms, and discusses the methods of image filtering, image enhancement and image segmentation. To solve the large quantity of data and the complicated requirements in image processing algorithms,...

The core theory of big data analysis is data mining. Association rule mining algorithm is an important branch of data mining. It contains two steps: generation of frequent itemsets and generation of association rules. The algorithm overhead in the generation of frequent itemsets is very high. Starting...

Aircraft flying in formation in wingtip vortices influence to the lift coefficient decreases, resistance coefficient increases, lift to drag ratio decreases sharply, the stall angle of attack decreases. Correctly reflect the aircraft wing flow field around the basic information, and to reveal the variations...

Because of its unique system features, it is very difficult for small rotor UAVs to be modeled. In this paper, the method of unmanned aerial vehicle modeling is summarized in detail. In order to achieve a good control effect, the accuracy of the model is very important for the design and verification...

Influence of aircraft wingtip vortices will make the lift coefficient of formation flying wingman decreases, the drag coefficient increases, the lift drag ratio decreased sharply, attack decreased the stall angle of attack. To correctly reflect the basic information around the airfoil flow field of aircraft,...

Based on the rapid progress of information technology in our country, computer software development information management system also has achieved good results. However, the current computer software development information management system has not been perfected. In order to make it to fully form...