According to analyzing the 35 samples, we get the 8kinds of major chemical contents of the body and glaze in each sample. After the establishing of the classification model of two samples, the results indicate: as long as choosing SVM algorithm correctly, the classification results of body and glaze samples will be quite ideal, and the support vector machine Isa very valuable new method which can process ancient porcelains data.
According to systematic structure of gray systematic theory, from the viewpoint of solving poverty information and dynamic problems, aiming to each typical problem in sports economic field to perform basic theoretic research on sports economic quantitative approach, the basic structure of applicable quantitative approach on sports economy is established. During empirical analysis, gray correlation approach, gray modeling prediction approach, systematic gray planning approach and gray optimizing control approach will be applied to carry out systematic analysis on the factors relationship in sports economic development, sports industry operation evaluation and sports market requirement prediction.
In the realization process of discrete particle swarm optimization method for the problem, an optimal solving model is firstly designed according to the problem in NWBFFSSP, which minimizes the maximum time used in the flow shop. Besides, a forward iterative algorithm is proposed to calculate the target value while the permutation encoding is also applied. Finally, the discrete particle swarm optimization algorithm is utilized for global optimization. In the discrete particle swarm optimization algorithm, to avoid premature, an iterative greedy algorithm has been put forward to improve the local individual searching ability, and to realize the flexible flow shop scheduling in multi constraint conditions.
This paper advances a two-stage ART-2 neural network method on working condition recognition of cement decomposition furnace. The process parameters describing cement decomposition furnace conditions are determined based on the process design requirements and the analysis of field operation experience. The field operating datas through mean filtering are determined as the first-class ART-2 network inputs, and the trend recognitions of the parameters are finished based on the trend recognition function. The results are determined as the second-class ART-2 network inputs,and the real time recognitions of decomposition furnace conditions are completed using the pattern recognition function. The simulation and practical operation show the effectiveness of the method.
Application complex assembly analysis capabilities of the Ansys Workbench is to solve the difficulty of the torsion angle of the steering column EPS, in certain conditions, the EPS steering column stiffness is analyzed accurately calculate. Its maximum torsion angle is 1.2148°, and it was compared with the experimental result. According to the larger part of the deformation and stress remodeling, it realized the parameterization of model size and applied the Design Xplorer module for steering column structure for optimization design. The optimal result shows that the maximum deformation of steering decreased by 3.70mm. Optimize the design of the steering column to provide a reference, to achieve a size parameter in Simulation and Optimization Module DX transfer, on the axis of maximum deformation amount calculated by Ansys DX size parameters designed to meet the requirements to get a new dimension.
In order to explore the pressure changes on the valve and the water velocity changes of the upper and lower endpoints at the valve, the dynamic grid technology in the FLUENT platform had been specifically built to analysis the valve simulation. Results showed that in the case of water flow speed: 5m/s, valve opening and closing process, the pressure on the valve plate changes are closely related to degree of turbulence in the flow field, this is particularly evident in valve closed. The changes of water velocity about two end points changes fully reflects the circulation changes. In addition, due to eccentricity valve plate rotation, velocity changes of two end points on valve plate are different, when the valve is opened or closed, the water velocity of bottom point is slightly greater than the upper point.
Image segmentation is the image processing to extract the key technology of information in a particular area. The existing main methods of image segmentation can be divided into the threshold segmentation method, region segmentation method, edge detecting and based on certain theory such as fuzzy theory method, this paper proposes a image segmentation method based on connected domain markers, and applied to the rice counting aspects in agriculture, and the results show that this approach has high accuracy in rice counting ways and research value.
This subject comes from the view of the feature of the LAN, based on functional requirements analysis from users, using Visual C++ programming language, under the protocol and was done on the platform of MFC. The function includes words-chatting, voice-chatting, video-chatting, file-sending, face-sending, shaking window and sending message to all, etc, it designed the usage and the interface humanizationally. Finally, it is packaged into an installer with the Install Sheild to make it much more convenient to use.
The connecting channel of swirl chamber has significant impact on the performance of diesel engine. Based on diesel engine BH175F1, the thesis first proposes the idea of dual channel insert with expansion angle and then designs nine solutions which differ in the expansion angle between channel A and B by 5° interval. Furthermore, with the help of FLUENT software, the thesis works out the airflow pattern of the swirl chamber during injection. Results indicate that when expansion angle of channel A is constant, the vortex strength increases with the enlargement of the expansion angle of channel B, when expansion angle of channel B remains 10°, the swirl ratio respectively reaches 4.7, 3.9 and 4.2, all of which have exceeded the optimum swirl ratio range and that is bad for the performance. In turn, when B is fixed, the increase of expansion angle of channel A is favorable to the airflow in swirl chamber, swirl ratio stays at 3.2 if expansion angle of channel A is 10° and B 5°. In these cases, the performance of the swirl chamber diesel engine will be improved, and certain basis as well as technical reference can be cited for the improving the performance.
Aero gear strength was obtained with the same kind of standard analysis results may not be very accurate, but with different standards to the same aerospace gearing analysis and comparison of results is of great significance, which can be seen in what circumstances the use of standard is more suitable. Analysis and compare the similarities and differences of stress strength calculation method about bearing capacity of cylindrical in aviation standard HB/Z and AGMA., And Introduced the strength assessment value comparison of two kinds of standard Respectively from the scope, basic calculating formulas, the correction coefficient and examples of calculation were compared. By comparison, HB/Z use more Correction coefficient than AGMA. At the same time, the calculated result is more convergence, the strength of geometry factor has a positive correlation with Results. Then we can have the conclusion that In the calculation of the contact strength and bending strength of aerospace cylinder gear, the calculation of HB/Z is more conservative. And with the increase in the number of teeth, the strength also has a increasing trend.
Invasion of user's privacy due to compromised biometric template draws great public concern recently. Cancelable biometric is proposed as a promising resolution by converting the original biometric template into a distorted version via a transformation function. However, certain schemes such as Densely Infinite-to-one mapping (DITOM) are merely applicable to fixed-length and ordered biometric features. This limits their application capacity on unordered and variable size features such as fingerprint minutia or descriptors. In this paper, we proposed an extended form of infinite-to-one transform that is capable to operate the two-dimensional feature vectors to generate a cancelable fingerprint template. The proposed method was evaluated using four public databases, i.e. FVC2002 DB1, DB2, DB3 and DB4. Experimental results demonstrate satisfactory accuracy performance. Besides, the changeability and non-invertibility are also justified.
In this paper, the GMDH objective cluster is applied to RBF neural network. It can solve shortcomings about that the RBF network cannot be objectively selected basis function center and improve the network training speed and accuracy rate. In order to detect the cotton contaminations, it use the improved RBF neutral network to do it. And the result shows that the improved RBF neutral network could locate contaminations in cotton precisely. That has significance in improving the quality of fabrics and reducing production costs.
Improvement has been done to flat-type solar water heaters on the market, parabolic surface condenses which has better effect on collecting heat has been used, sensor technology and Bluetooth technology have well been integrated into the design, and all the electricity consumed were supplied by an external solar panels, which makes it safety, convenient, and practical, and little fossil energy consumed. Experiment has been done with a solar water heater we designed, which could contain 2.5L water. The study found that the thermal efficiency of the product was about 57%, which is higher than most solar heating products currently on the market.
Previous tunnel fire disasters have shown that serious damage could be caused. The first goal of tunnel fire safety is to guarantee the life safe of tunnel users. It is therefore important to pay much attention to the evacuation system of tunnels. The main purpose of this paper is to provide the approach and reasonable value of walk speed for evacuation assessment in tunnels with cross connections. Experiments were conducted in a tunnel with cross connections to measure the movement of tunnel users. Furthermore, taking the tunnel fire scenario as example, the whole evacuation process in the tunnel fire is assessed by the evacuation model, SGEM and Japanese evacuation empirical equation. The similar calculated evacuation time are obtained by the two approaches. The evacuation time is a crucial data for knowing the efficiency of the tunnel evacuation system, and useful information for supporting fire safety design of the tunnel.
In order to predict the noise of the large wind power yaw reducer, the virtual prototyping model of the large wind power yaw reducer was established based on its working conditions, and the vibration response based on the modal was solved. Noise of the reducer's gear box was predicted by combining the finite element method and acoustic boundary element method, and the results show that the main peak noise frequencies are 420Hz, 590Hz and 1190Hz, the sound pressure which is relatively high is mainly distributed in the low frequency band, and the sound pressure is larger especially when the frequency is between 300Hz and 1200Hz, The corresponding sound pressure level under the noise frequencies of 420Hz, 590Hz and 1190Hz are 82.716dB, 67.333dB and 47.557dB, and the area with large noise is small in the radiation sound field, but the sound pressure is higher than 78.6dB in some area, which have a great influence on environment. The noise prediction results can provide reference and foundation for the study on noise reduction of the large wind power yaw reducer.
In order to using finite element method to design structural and analyze stress of working equipment, took the bucket rod of a certain small hydraulic excavator working device as the research object three-dimensional (3D) model of bucket rod structure was established by using 3D software Pro/E. Then the 3D model was successfully imported into the finite element analysis (FEA) software ANSYS to establish FEA model with no data loss through the designing of seamless interface between ANSYS and Pro/E. The optimization analysis of bucket rod's performance was successfully completed by using the OPT module of ANSYS as the research tool. Under the detrimental working conditions, static mechanics analysis is conducted for finite element analysis. Afterwards, the stress and strain nephogram of bucket rod were both obtained by ANSYS software. The research results showed that, the optimization analysis method can effectively enhance the design efficiency of product based on finite element technology. Finally the maximum stress and strain of bucket rod were found out in song certain cases, which providing theory reference for the similar parts of structure optimization.
Introduce the main research of the ERP used in construction industry enterprises, and summarize the construction enterprises on implementing ERP processes, then analyze the ERP difficulties and provide valuable suggestions for the construction enterprises.
The integer errors are harmful for the security of software. Because of the Test Oracle problem, integer bugs are always ignored. Metamorphic Testing can prove a way to determine the correctness of testing outputs with metamorphic relations between a series of outputs that correspond to a series of inputs, based on necessary properties of software under testing. In this paper, a metamorphic relationship is proposed which can detect invisible integer bugs without oracle. It is shown in our case study that this method can detect some invisible errors which are difficult to be found in conventional approach and improve the efficiency of integer bugs detection.
To improve the DSR protocol in wireless network, this paper puts forward MR-DSR, a kind of optimized link-state routing algorithm under multiple link selection wireless network. By calculating the link quality of multiple links, it realizes the purpose of avoiding network block and reducing network load. Based on the measurement results of each link quality under multiple link selections, we improve the protocol with AODVjr algorithm, and balance the load of the entire network considering the node energy distribution strategy. The improved algorithm is simulated on OPEN simulator, and the result shows that the algorithm can guarantee the stability of the network. In the event of link failure conditions, it can help choose the optimal link, thus ensuring the robustness of the entire network.
This paper discusses and analyzes many solid and durable revetment structures and their defects and studies and introduces a novel technology of environment-friendly ecological siding retaining wall revetment structure, which is applicable to the revetment projects with low bearing capacity of waterside foundation and poor stability of original slope, has excellent application effect in the actual engineering and achieves high economic and social benefits. This paper also predicts the future development trend of the revetment: it's required that the revetment not only can guarantees the strength and stability, but also can mutually coordinate with the surrounding environment, so as to form an open ecological system maintaining the biological dynamic balance.
