Changzhou Vocational Institute of Engineering

Changzhou, China

Changzhou Vocational Institute of Engineering

Changzhou, China
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Yu R.,Changzhou Vocational Institute of Engineering
Revista de la Facultad de Ingenieria | Year: 2017

Starting with the design of bench test based on Hardware -In-the-Loop, the principle has been analyzed, the dSPACE simulation system and CAN field were incorporated; a controlling tool has been created with ControlDesk during Matlab/Simulink environment to carry out the Hardware-In-the-Loop simulation analysis and research the quality parameters related to shifting, which can provide the base for improve the development of shifting quality in terms of engineering aspects.


Yu R.,Changzhou Vocational Institute of Engineering
Chemical Engineering Transactions | Year: 2015

Considering the parameters of the traditional PID control algorithm are not capable of online adjustment and do not have adaptive capability once they are determined, which can not satisfied the precision control requirement of servo system with complex nonlinear friction, a PID controller based on radial basis function neural network (RBFNN) is designed, the advantages of RBFNN such as infinity approaching nonlinear system, little operation quantity and speedy constringency are combined with PID control technology organically to obtain high position tracking accuracy. The simulate results show that compared with common PID control, the RBFNN PID controller can adaptively adjust the controller parameters, greatly improving the control precision of the system. Copyright © 2015, AIDIC Servizi S.r.l.


Jiang S.,Changzhou Vocational Institute of Engineering
Chemical Engineering Transactions | Year: 2017

The so-called digital control power source, also referred to as a "loop inside the processor" refers to the system controller can execute the control algorithm in the digital domain. It is necessary to compare the two to produce strings of digital pulse width to drive the power switch, but instead of using a conventional analog PWM comparator. It will all analog system parameters into a digital signal in the digital domain and using the data to calculate the control response, and the newly generated control information is transmitted to the system increases. By digitally controlled analog circuits can greatly reduce system cost and power consumption. In addition, many microcontroller and DSP have been included in the PWM controller chip, which allows the realization of the digital control has become easier. Copyright © 2017, AIDIC Servizi S.r.l.


Tang H.,Changzhou Vocational Institute of Engineering | Yang R.,Changzhou Vocational Institute of Engineering | Li R.,Changzhou Vocational Institute of Engineering
Optical Materials | Year: 2017

A color tunable phosphor of Eu2+-activated monophosphate Ba3Ca3(PO4)4 was developed via facile solid-state reaction synthesis. The samples were tested by X-ray powder diffraction (XRD) patterns, morphological properties, luminescence and decay lifetime measurements. The structural characteristics were discussed. The excitation bands of the phosphors cover the UV-, near-UV and blue-wavelength bands extending from 300 to 440 nm. The luminescence spectra of the phosphors show a great dependence on the Eu2+-concentration in Ba3Ca3(PO4)4, which can give blue to yellow emission colors. There are two kinds of Eu2+ centers in Ba3Ca3(PO4)4 lattices, which give yellow (EuI) and blue (EuII) luminescence with the maximum wavelength at 565 nm and 450 nm, respectively. The structural occupations and luminescence properties of EuI and EuII centers were discussed. EuI (yellow center) has a dominant contribution to the total luminescence with the increase of the Eu2+-doping level. The luminescence internal quantum efficiency and thermal stability (activation energy) were reported. The reported results could be helpful for the further potential application of the phosphor. © 2017


Xiao Y.,Changzhou Vocational Institute of Engineering
AIP Conference Proceedings | Year: 2017

This paper presents an image classification algorithm based on spatial sparse coding model and random forest. Firstly, SIFT feature extraction of the image; and then use the sparse encoding theory to generate visual vocabulary based on SIFT features, and using the visual vocabulary of SIFT features into a sparse vector; through the combination of regional integration and spatial sparse vector, the sparse vector gets a fixed dimension is used to represent the image; at last random forest classifier for image sparse vectors for training and testing, using the experimental data set for standard test Caltech-101 and Scene-15. The experimental results show that the proposed algorithm can effectively represent the features of the image and improve the classification accuracy. In this paper, we propose an innovative image recognition algorithm based on image segmentation, sparse coding and multi instance learning. This algorithm introduces the concept of multi instance learning, the image as a multi instance bag, sparse feature transformation by SIFT images as instances, sparse encoding model generation visual vocabulary as the feature space is mapped to the feature space through the statistics on the number of instances in bags, and then use the 1-norm SVM to classify images and generate sample weights to select important image features. © 2017 Author(s).


Tang H.,Changzhou Vocational Institute of Engineering | Yang R.,Changzhou Vocational Institute of Engineering | Huang Y.,Soochow University of China
Journal of Alloys and Compounds | Year: 2017

Novel red-emitting Na2MgSiO4: Eu3+ phosphors with different Eu3+ contents were synthesized by sol-gel method. The crystal structure was confirmed by X-ray powder diffraction. The luminescence properties and decay curves were investigated. The optical Eu3+ doping concentration of Na2MgSiO4: Eu3+ is about 5 mol%. The excitation spectrum exhibits a broad band of 250–500 nm. The abnormal dominant emission peak of Na2MgSiO4: Eu3+ phosphors excited effectively by 393.5 nm (near-UV) is located at 702 nm due to the 5D0 → 7F4 transition that caused by the highly polarizable chemical circumstance. The CIE chromaticity coordinate and the photoluminescence quantum yield of the Na2MgSiO4: 0.05Eu3+ phosphor are (0.644, 0.355) and 65.81%, respectively. The mechanism of concentration quenching can be attributed to the dipole–dipole interaction between Eu3+ ions and the thermal quenching might be ascribed to the competition between energy transfer and crossover process. © 2017 Elsevier B.V.


Li D.-M.,Changzhou Vocational Institute of Engineering
Conference Proceedings of the 4th International Symposium on Project Management, ISPM 2016 | Year: 2016

The success of enterprises in the future lies in two important elements, flow (reduce lead time) and flexibility (equipment, personnel and product), which require enterprises to continuously carry out lean production VSM based on macro strategy and reduce waste during production. Waste during production usually adopts the form of shotpoint to be promoted and improved in the hope of decreasing total production cycle time (namely increasing flow of enterprise product). Total freight volume management discussed in this paper is a theory to present flow and flexibility of enterprise products based on the product of hauling distance and hauling weight during all production links within total production cycle time under VSM. Total freight volume fully reflects waste and efficiency of VSM during production and is presented to enterprise managers in the form of macro data.


Yu R.,Changzhou Vocational Institute of Engineering
Chemical Engineering Transactions | Year: 2015

Storage battery's thin energy density has directly restricted the industrial development of electric vehicles, the pivotal parameters have been matching based on the theoretical analysis of circulating operation, and combined with genetic algorithm's superior ability, the peak power of motor and ratio of transmission have been optimized with the consideration of dynamic restriction. The results show that the optimized parameter can lead the automobile' driving mileage to increase 18.78% on the basic dynamic requirement of national standard. Copyright © 2015, AIDIC Servizi S.r.l.


Yu R.,Changzhou Vocational Institute of Engineering
International Journal of Control and Automation | Year: 2016

Aiming at the market shares of automatic mechanical transmission, the driving smoothness was studied. Based on the dynamical model of automatic mechanical transmission, the numerical model of automatic mechanical transmission had been established and a shifting strategy was analyzed. The result shows that the impact of automatic mechanical transmission on the condition of shifting fast can meet the national legislation. © 2016 SERSC.


Wu Y.,Changzhou Vocational Institute of Engineering | Wei Y.,Nanjing University of Aeronautics and Astronautics
Hanjie Xuebao/Transactions of the China Welding Institution | Year: 2015

The first intelligentialized welding CAPP system was developed by combining expert system based on the current research situation of welding CAPP at home and abroad. This system can complete welding document preparation with its welding process design module, process cards compile module and material cost quota calculation module. Welding process design module can deduce welding process parameters based on welding knowledge base, welding inference engine and welding explanation facility. There are three ways to compile process cards: the typical procedure method, the similar procedure method and the menu method. Thus the user can complete the work easily and fast. By parametric groove and iteration method, the total and every layer consumption of multi-pass welding can be calculated. ©, 2015, Harbin Research Institute of Welding. All right reserved.

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