Ningbo Polytechnic

Ningbo, China

Ningbo Polytechnic

Ningbo, China
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Bo J.,Ningbo Polytechnic
Zhongguo Jixie Gongcheng/China Mechanical Engineering | Year: 2015

To solve the problem of erosion wear mechanism and the partial damage repair problems of the valve core in the application of high-pressure throttle valves, this paper performed erosion wear experiments of a high-pressure throttle valve. The erosion wear mechanism of the valve core was presented based on the analysis of erosion phenomena and pattern. To recover the service performance of high-pressure throttle valve, laser cladding remanufacturing of the valve core was conducted by using ferroalloy powder, and the shape and size of the valve core was restored. The erosion wear experiments of the remanufactured high-pressure throttle valve were performed, and the experimental results show that laser cladding remanufacturing can restore the service performance of the high-pressure throttle valve. ©, 2015, China Mechanical Engineering Magazine Office. All right reserved.


Jiang M.,Ningbo Polytechnic
MATEC Web of Conferences | Year: 2016

Electromagnetic spider web the launch circuit has introduced a lot, but in the center position of the utility of the spider generally have 3 kinds of circuits respectively, the use of single-chip microcomputer circuit of the low energy consumption spider by multi-channel transmission, single circuit receiver circuit. Direct use of the 3 channels of the spider and the use of PLC circuit spider, depending on the actual situation were placed. © Owned by the authors, published by EDP Sciences, 2016.


Bo J.,Ningbo Polytechnic | Wu X.,Changzhou Institute of Technology
Zhongguo Jixie Gongcheng/China Mechanical Engineering | Year: 2014

In order to solve the problem of digital design of swashplate axial piston pump in the condition of mechanical and hydraulic coupling, this paper used the co-simulation method to bulid the model and analyse the coupling of the piston pump. A power bond graph theory was used to establish hydraulic model of the piston pump, the piston chamber pressure was defined as the coupling variables. The Lagrange method was used to establish dynamics model of the piston pump, coupling variables in hydraulic model were defined as input variables of mechanics model, and the actual speed measured on mechanic model was defined as the input variable of hydraulic model. The decoupling analysis was finished by the complete mechanical and hydraulic coupling model. Finally, an experimental platform was built to verify the correctness and feasibility of the simulation method, the flow rate and pressure between experiment and simulation were compared, and the foundation for the integrated design of piston pump will be built.


Liu X.,Ningbo Polytechnic
Lecture Notes in Electrical Engineering | Year: 2013

In order to reflect the important role of sport dance in college physical education, teaching dance classes for College Sports, presented to classroom teaching research, and create a good climate for innovation, and establish a knowledge and innovation, health teaching concepts, and specifically from teaching content, teaching methods, the image of teachers, students self-issued learning were discussed. Practice has proved effective, a deliberate attempt to explore the College Sports Dance Teaching Reform. © 2013 Springer-Verlag.


Liu X.,Ningbo Polytechnic
Lecture Notes in Electrical Engineering | Year: 2013

Students are the most active young people, the most creative group, and the Olympic movement is mainstream and core of the contemporary world of sports, sports and culture, it advocated the combination of education and to institutions of higher learning to develop a comprehensive development talent provides a wealth of educational resources. Digging through the "Beijing Olympics" spread the Olympic spirit and give full play to the educational function of sport, to enable students to become moral, intellectual, and physical development of talent. © 2013 Springer-Verlag.


Jiang M.,Ningbo Polytechnic
MATEC Web of Conferences | Year: 2016

Low power consumption long time offset magnetic field detector (earthquake prediction).The design of the hardware circuit of the magnetic field detector seismic geomagnetic acquisition and pre processing module mainly includes. Electronic compass, compass. monitoring device while the magnetic azimuth for monitoring and analyzing the object, GSM, but it can also be applied to other seismic precursor information analysis, such as earthquake precursory infrasound abnormality, only need infrasound abnormality intelligent sensor replace geomagnetic anomaly intelligent sensor, and modify the relevant parameters can be. © 2016 The Authors, published by EDP Sciences.


Ying L.-H.,Ningbo Polytechnic
Gaoya Dianqi/High Voltage Apparatus | Year: 2010

Most of surge components, which impose negative influence on electronic equipments, are of low frequency, however a small number of surge components with high frequency also impose strong interference on the equipments. Surge protective device (SPD) combined with MOV and low pass filter can absorb both low and high frequency energy of surge. In this paper, the software Matlab is used to simulate circuit response under 1.2/50 μs surge wave. The protection effectiveness of SPD is analyzed with various types of loads. It is concluded that all type and parameters of a low-pass filter as well as the match between the filter and load need to be considered when select such SPD with filter.


He Y.,Ningbo Polytechnic
Open Cybernetics and Systemics Journal | Year: 2015

Cost control is one important topic in today’s financial management. It not only reflects the scientific approach of organizations’ management, but also shows optimizes the companies’ structure. Finance is a critical element of companies’ long-term and sustainable development, which has to some extent comprises the cost control in its scope. This thesis tries to elaborate the importance of cost control in financial management and unveil the cost control problems in modern enterprises. The author overlooks the general financial management system in China and probes the weaknesses of it. After a series of the analysis, the author proposes three recommendations: one is to adjust the orientation of cost control, the other two are to provide the necessary political support and to establish an independent department within the company. © Youming He.


Ying L.,NingBo Polytechnic
Advances in Intelligent and Soft Computing | Year: 2012

Aim to overcome the existing weakness of technical education, take motor velocity detection system design as an example, this paper addresses the necessity of engineering education adoption in higher vocational education, and it also detailed describes how it can be achieved by properly designing laboratory training system. © 2012 Springer-Verlag GmbH.


Shi X.,Ningbo Polytechnic | Liu C.,Ningbo Polytechnic
Energy Procedia | Year: 2011

Using qualitative research method, an in-depth interview and field trip investigation were carried out to explore the implementation of environmental education (EE) in higher education institutions (HEI) with an aim to put forward possible solutions and suggestions. © 2011 Published by Elsevier Ltd.

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