Development and theoretical analysis of novel center-inlet computer-controlled polishing process for high-efficiency polishing of optical surfaces

2019 ◽  
Vol 59 ◽  
pp. 1-12 ◽  
Author(s):  
Bin Lin ◽  
Xiang-Min Jiang ◽  
Zhong-Chen Cao ◽  
Tian Huang
Keyword(s):  
Theoretical Analysis ◽  
High Efficiency ◽  
Polishing Process ◽  
Optical Surfaces ◽  
Computer Controlled

Realization of Optional Method of Determining the Concrete's Freeze-Thaw Resistance with Help of Dilatometer

2014 ◽  
Vol 1082 ◽  
pp. 258-264
Author(s):  
Olga Pertseva ◽  
Sergey Nikolskiy
Keyword(s):  
Theoretical Analysis ◽  
High Efficiency ◽  
Nondestructive Method ◽  
Labor Input ◽  
Laboratory Equipment ◽  
Freeze Thaw

It’s really necessary to determine freeze-thaw resistance of concrete faster and correctly.The offered method is based on measurement of long strength by nondestructive method, based onacoustic issue. Also dilatometer is used. During this research, the theoretical analysis of concrete'sspecimen dependence on freeze-thaw resistance and energy, which is emitted by a specimen duringdestruction, has been carried out. Freeze-thaw resistance of a specimen is calculated as themathematical relation of these energies. Correctness of the offered method is proved byexperiments. The offered method is characterized by small labor input, high efficiency and a wideapplication scope, but special laboratory equipment is needed.

In process metrology of aspheric optical surfaces during sub-aperture polishing process

2015 ◽  
Author(s):  
L. M. Pant ◽  
M. P. Singh ◽  
K. K. Pant ◽  
A. Ghosh
Keyword(s):  
Polishing Process ◽  
Optical Surfaces

A New High-Efficiency and Low-Damage Polishing Process of HgCdTe Wafer

2012 ◽  
Vol 27 (2) ◽  
pp. 229-232
Author(s):  
Yan Li ◽  
Jie Wanqi ◽  
Hang Gao ◽  
Renke Kang
Keyword(s):  
High Efficiency ◽  
Polishing Process

Development of a computer-controlled polishing process for x-ray optics

2009 ◽  
Author(s):  
Gufran S. Khan ◽  
Mikhail Gubarev ◽  
William Arnold ◽  
Brian Ramsey
Keyword(s):  
Polishing Process ◽  
Ray Optics ◽  
X Ray ◽  
Computer Controlled

Study on Plane Magnetic Abrasive Finishing Process - Experimental and Theoretical Analysis on Polishing Trajectory -

2010 ◽  
Vol 126-128 ◽  
pp. 1023-1028 ◽  
Author(s):  
Yan Hua Zou ◽  
An Yuan Jiao ◽  
Toshio Aizawa
Keyword(s):  
Theoretical Analysis ◽  
Influence Factor ◽  
Polishing Process ◽  
Magnetic Abrasive Finishing ◽  
Abrasive Finishing ◽  
Designed Experiment ◽  
Linear Movement ◽  
Magnetic Abrasive Polishing ◽  
The Moment ◽  
Surface Precision

This research studies an effective polishing process to elevate the surface precision and homogeneity by improving the polishing trajectory of magnetic brush. The moment of magnetic brush is a key influence factor on finishing characteristics, but in conventional plane magnetic abrasive Polishing process, the movements of magnetic brush is relatively simple. In this paper a polishing process using the complex polishing trajectory of magnetic brush has been modified and studied by use of newly designed experiment device. The linear movement of workpiece, the rotation and revolution or movement in XY coordinate plane of magnetic brush can be realized by this device. In comparison with conventional method, variation regularity about surface roughness and the material removal are been studied. According to experimental results for polishing trajectory of magnetic brush, finishing characteristics was clarified. The results show that studies on polishing trajectory of magnetic brush are more valuable and the experimental researches are consistent with theoretical analysis. In addition, the accuracy of plane magnetic abrasive finishing can be elevated in terms of the reasonable planning for polishing trajectory of magnetic brush.

Design of New Small Hydroelectric Device

2012 ◽  
Vol 472-475 ◽  
pp. 883-886
Author(s):  
Li Zhen Zhang ◽  
Xiao Long Cao ◽  
Jun Tao Li ◽  
Shu Lei Wu
Keyword(s):  
Theoretical Analysis ◽  
Water Resource ◽  
Model Test ◽  
High Efficiency ◽  
New Device ◽  
Design Scheme ◽  
Force And Motion ◽  
Technological Characteristics ◽  
Working Principle

The paper designed a new small hydroelectric device after analyzing the technological characteristics and the deficiency of the existing hydropower. As a supplement of conventional power, the device can be used in the places that have no conditions to build dams but have a lot of water resource. The new device working principle was introduced and the analysis of its force and motion was made. The design scheme is proved feasibility through theoretical analysis. The model test indicates that this new hydroelectric device has high efficiency.

scholarly journals Soft-Switching High Gain Step-Up DC/DC Converter without Auxiliary Switches

2019 ◽  
Vol 8 (12S) ◽  
pp. 633-636
Keyword(s):  
Theoretical Analysis ◽  
Power Flow ◽  
High Efficiency ◽  
Input Voltage ◽  
High Gain ◽  
Soft Switching ◽  
Zero Voltage Switching ◽  
Auxiliary Cell ◽  
Zero Voltage ◽  
Voltage Switching

This manuscript presents a novel high gain, high efficiency Soft-switching high step-up DC/DC converter for battery-operated vehicles. The high step-up converter can transfer the power flow from the small voltage to high voltage. The conventional two input inductor hard switched non-isolated DC-DC converter improved with an additional auxiliary cell to attain the Zero voltage switching, due to obtaining the softswitching the efficiency may improve and reduces the stress across the main switches. The isolated converters are used as a transformer to attain high gain, whereas in the proposed converter obtains the high gain without a transformer and contains the high efficiency in the step-up mode of operation. The main aim of the converter is to attain the Zero voltage switching without using any additional auxiliary switches. In this paper, the input voltage applied as 30V, and the obtained output voltage is fifteen times to the applied voltage, which is 450V and the output power 850W. This paper mainly presents the theoretical analysis of converter operation and the evaluation of the simulation results validated with the theoretical analysis.

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