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Among the instructional design methods focusing on learning, the ASSURE Model proposed by Robert Heinich is a classic one. The model is a guidance which guides teachers how to use media and technology in the classroom teaching. It provides teachers with a practical blueprint for instructional design and directs them to complete a media-based instructional design task systematically and to make the...
The measurement of parameters of the crankshaft runout was implemented online. Then the runout data was processed by adopting the least square method and vector model transformation. The experiment shows that the tested result agrees with the real crankshaft deformation. The classifier for the crankshaft straightening position using LS-SVM was set up. The set classifying system is applied to the crankshaft...
Consistency check is avoided in improved analytic hierarchy process due to the character of transfer matrix. Determining the the weights for evaluation factors by using improved AHP and principal component analysis. Then the weights obtained by this way includes not only the experience of researchers, but also the structural features of original data. A new extenics model for risk assessment based...
The research object of this paper is a certain complex sulfur-iwn which contains copper in Anhui province. It focuses on the flowsheet about the separation of copper and sulfur in low alkalinity condition. The content of copper in the original oar is 0.39%, and sulfur is 36.19 percent. In low alkalinity conditions, we used copper compound maily LP collectors, first through copper selective flotation,...
Determination of conventional bitumen application rates in the seal design of South Africa using (Technical Recommendations for Highway (TRH3)) requires information related to conditions on the road at the time of sealing and properties of materials to be used for this purpose. Although the design process and input parameters are described in TRH3, the significance and sensitivity of the various input...
This research reviews the effects of the single component, the mixed oxides and the mesoporous materials on catalyst. Titanium dioxide and zirconium dioxide as single component support show higher activity than alumina in hydrodesulfurization, but their specific surface area need be increased further. Compared with the single component, the mixed oxides with higher specific surface area and strength...
With the global "low-carbon economy" booming, energy conservation and emission reduction on tourism is a focus of global concern, because tourism is the important sector of carbon emission. Many tourism regions have proposed the measurements of energy conservation and emission reduction. Research on tourism emission reduction also began to rise. However, energy conservation and emission...
Data Mining (DM) is a knowledge discovery process by using statistical theory and artificial intelligence algorithms, the application in business and other areas have started. This article focuses on the general DM technology and its application in the operations of supermarket, especially discusses the specific use of DM in the process of customer relationship management (CRM).
The transmission abnormal sound affects the vehicle interior sound quality and subjective comfort. In order to control the transmission abnormal sound, the noise sources were explored. The transmission vibration and noise field tests were performed on the basis of theoretical guidelines. The experimental study indicates that one of frequencies of vehicle interior noise falls within the range of gear...
Three degrees of freedom (TDOF) vibration system during sheet blanking based on servo press is established, and the amplitude vibration of the body, slider and base of the servo press is simulated by the software Matlab/Simulink. The influence of the blanking speed and the initiation fracture position of blank on the maximum amplitude of slider are analyzed in detail. The results show that with the...
Ensemble empirical mode decomposition (EEMD) is a newly noise-assisted analysis method, is proposed to eliminating mode mixing present in the original EMD, which has been proved quite effective in the bearing fault diagnosis. But when the Signal-to-Noise(SNR) of the vibration signal is low, it hardly extracts the fault information. Worse more, mode mixing appear frequently when EMD is applied to the...
The traditional dry beneficiation such as the pneumatic separator, the pneumatic jig and the air table, has low efficiency and with heavy dust pollution, can't meet the requirements of the modern beneficiation. The technology of the air-dense medium fluidized bed concentration, an effective dry beneficiation, can solve the above problems. This paper presents the separation principal of the air dense...
Based on the structure of cartridge valve and the continuity equation of fluid, the mathematic model of cartridge valve was established. In addition, the simulation model of cartridge valve was built based on AMESim. After analyzing, several parameters related to pressure steady-state performance were selected to study on. The effects of the spring in main spool, the front cavity of main valve, the...
The thermoelectric conversion with lower Renault number (Re) fluid, such as waste heat from industry boiler, and engine's circled cooling water, which can be designed as intramural generator structure. In this research, a thermoelectric project analysis model and the description of an intensified system are presented, its generator with the aligned or staggered platoon structure has strengthened heat-transfer...
High voltage submersible motor works in deep water all the year around, and its operating insulation performance deteriorates influenced by the complex environment. Due to the special installed circumstances, the motor can not be readily maintained. Because of the losses caused by motor deterioration, the prediction of the insulation life-expectancy has a great significance. This paper analyzes the...
The characteristics of low transmission power and narrow bandwidth make the IEEE 802.15.4 system vulnerable to external interference. The interference varies in time, frequency and is not able to be recognized since the modulation technology is normally different. As applications in the field of electrostatic detection require large-scale deployment, the traditional method of switching channel to...
Inspection and recognition of optical target are one of important research field in Opto-Eleetronic target tracking. According to need for project, system of Inspection and recognition of optical target is proposed based on digital signal processor TMS320 DM642. The system block diagram for hardware design is discussed, and algorithm flow diagram as well as detailed software processing algorithm is...
The relative theory of improved form BDPSK modulation is analyzed. The discussion focuses on the influences of system performance made by delay module during the process of BDPSK differential coherent demodulation. The system demodulation expression between precision delay and error delay is compared. Through improving demodulation system, theoretically, the accuracy of delay units is improved. The...
Mathematical model of acquiring driving error and contact point of tooth surface is built and simulation analytical method is put forward based on principle of minimal orientation-distance. On this basis, driving error and contact point of gear pair can be calculated with relevant program when error exists, and driving error curve and contact area of gear pair could be achieved. Making use of this...
An experimental measurement method used to build the two-port model of the silencer based on the least square method (LSM) was developed here. The quantitative relationship between the parameters of the transfer matrix of the silencer and the sound pressure measured at the certain position in an experimental duct system was researched. A silencer and a measurement duct system are designed and established...
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