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浏览/检索结果: 共14条，第1-10条 帮助

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Per-Packet Traffic Measurement in Storage, Computation and Bandwidth Limited Data Plane 期刊论文  OAI收割
IEEE-ACM TRANSACTIONS ON NETWORKING, 2024, 页码: 13
作者:  Cong, Yinchuan;  Xie, Kun;  Wen, Jigang;  Zhang, Jiwei;  Yin, Yansong
  |  收藏  |  浏览/下载：17/0  |  提交时间：2024/12/06
Green economic efficiency in the Yangtze River Delta: spatiotemporal evolution and influencing factors 期刊论文  OAI收割
ECOSYSTEM HEALTH AND SUSTAINABILITY, 2019, 页码: 16
作者:  Wang, Zhenbo;  Wang, Xinming;  Liang, Longwu
  |  收藏  |  浏览/下载：62/0  |  提交时间：2019/10/11
Green economic efficiency in the Yangtze River Delta: spatiotemporal evolution and influencing factors 期刊论文  OAI收割
ECOSYSTEM HEALTH AND SUSTAINABILITY, 2019, 页码: 16
作者:  Wang, Zhenbo;  Wang, Xinming;  Liang, Longwu
  |  收藏  |  浏览/下载：21/0  |  提交时间：2019/10/11
Green economic efficiency in the Yangtze River Delta: spatiotemporal evolution and influencing factors 期刊论文  OAI收割
ECOSYSTEM HEALTH AND SUSTAINABILITY, 2019, 页码: 16
作者:  Wang, Zhenbo;  Wang, Xinming;  Liang, Longwu
  |  收藏  |  浏览/下载：35/0  |  提交时间：2019/10/11
Error analysis of the micro temperature control system (EI CONFERENCE) 会议论文  OAI收割
2012 International Conference on Measurement, Instrumentation and Automation, ICMIA 2012, September 15, 2012 - September 16, 2012, Guangzhou, China
Han Z.; Song K.
收藏  |  浏览/下载：58/0  |  提交时间：2013/03/25
The approximate calculation of atmospheric path radiance in close range and horizontal direction (EI CONFERENCE) 会议论文  OAI收割
2012 International Conference on Sensors, Measurement and Intelligent Materials, ICSMIM 2012, December 26, 2012 - December 27, 2012, Guilin, China
作者:  Sun Z.;  Chen Y.;  Zhang Y.
收藏  |  浏览/下载：48/0  |  提交时间：2013/03/25
Atmospheric path radiance is the key factor in the accuracy of objective radiation measurement. In the traditional radiation character measurements  it is compared with the results of MODTRAN and measurement in experiment. It is revealed that the accuracy of software is 7.8%  under the help of the atmospheric observation equipment  and the formula is 4.9%  MODTRAN and other software likewise  which could demonstrate the validity of the pproximate calculation formula in close range and horizontal direction. In this article  the indeterminacy rate could be around 10~20%  in the process of deducing and experiment  it is highly restricts the measurement accuracy of objective radiation. For this reason  the validity of the approximate calculation formula in close range and horizontal direction is fully proved  it is quite significant to develop the study of measure and calculation in path radiance. The approximate calculation formula for path radiance in close range and horizontal direction is expressed in this article  which supply a new method in approximate calculation of path radiance for objective radiation measurement. (2013) Trans Tech Publications  Switzerland.  
The research on adaptive measurement of angular acceleration for photoelectric servo turntable (EI CONFERENCE) 会议论文  OAI收割
2011 International Conference on Mechatronic Science, Electric Engineering and Computer, MEC 2011, August 19, 2011 - August 22, 2011, Jilin, China
作者:  Guo J.;  Chen J.;  Guo J.
收藏  |  浏览/下载：34/0  |  提交时间：2013/03/25
The paper proposes a new measurement method of angular acceleration for photoelectric servo turntable. Piezoelectric angular acceleration sensor is used to measure angular acceleration directly  Adaptive FIR filter based on LMS algorithm is established on DSP  by which angular acceleration signal can be filtered and corrected errors adaptively  then angular acceleration signals can be measured adaptively. This method avoids measurement errors and calculation noise by computing angular acceleration indirectly  thus improving measurement precision and making measurement results better than traditional methods. The gotten angular acceleration can be sent to servo control mechanism as feed forward control signals to improve control effects of servo turntable significantly. 2011 IEEE.  
A small thickness measurement system based on PSD and FPGA (EI CONFERENCE) 会议论文  OAI收割
3rd International Conference on Measuring Technology and Mechatronics Automation, ICMTMA 2011, January 6, 2011 - January 7, 2011, Shanghai, China
作者:  Guo J.;  Guo J.;  He X.
收藏  |  浏览/下载：35/0  |  提交时间：2013/03/25
Considering that the requirement of industrial manufacture  An AT89S51 singlechip works as the core processor of the system. By two laser triangulation  a small thickness measurement system based on PSD and FPGA is presented. It takes S3931 PSD of one dimension as position detection device  A FPGA produces logic control signals for the whole system  the small displacement is converted to differential voltages  which is made by Hamamatsu in Japan  and after amplification and A/D transformation  8-bit parallel data is send to singlechip from FPGA by external interrupts  and the final calculation results output to the LCD display module. After digital micro meter calibration  we get the small thickness. Experiments show that the detection accuracy of the system is not less than 10um.  
The Research of real time auto-recognition of the moire fringe (EI CONFERENCE) 会议论文  OAI收割
International Symposium on Photoelectronic Detection and Imaging 2011: Advances in Imaging Detectors and Applications, May 24, 2011 - May 26, 2011, Beijing, China
Wang M.-J.; Wu Z.-G.
收藏  |  浏览/下载：31/0  |  提交时间：2013/03/25
Measuring the movement of raster by the method of moire fringe has the advantage of high sensitivity  high resolution and non-contacted measurement. The characteristic of moire fringe is that the image is white alternate with black  the angle of the stripes is uniform  the width of the stripes is uniform  the terminators of the stripes aren't clear. A fast method that can figure out the width and angle of the moire fringe precisely is put forward in this paper. It calculates the angle the stripes firstly. According to the principle of the minimum mean squared error (MMSE)  the closer a series of data is  the smaller the value of the MMSE will be. The method is described as follows: It takes the image's center as the origin  180 beelines pass through the origin with the same angle interval. it calculates the value of the minimum mean squared error of the 180 beelines and find out the least one among those  then the angle of the moire fringe comes out primarily. In order to improving the calculating precision of moire fringe  60 equal angles are divided in the neighborhood of the angle  then a precise angle of moire fringe is calculated according to the principle of the MMSE. After getting out the angle of the moire fringe  we begin to calculate the width of moire fringe. A line vertical with the moire fringe is drawn  and we can get the width of the moire fringe by the vertical line. In order to get over the influence of the noise  an effective area with the shape of diamond is selected in the image. The data of area is accumulated and projected according to the direction of moire fringe  and a sine curve come out. The width of moire fringe can be obtained by getting the position of the first wave crest  the position of the last wave crest and the number of wave crest. Experiments prove that the precision of the method put forward in this paper is enhanced in comparison with the traditional frequency method  the precision of width calculation achieves to 99.6% according to the evaluation indicators of width detection error. The computing speed is boosted largely compared with traditional method  and it can achieve with 15 ms  that satisfying the demand of real time. 2011 SPIE.  
Dynamic data fixing for IR target radiation characteristics (EI CONFERENCE) 会议论文  OAI收割
2010 International Conference on Computer, Mechatronics, Control and Electronic Engineering, CMCE 2010, August 24, 2010 - August 26, 2010, Changchun, China
Lihua C.; Juan C.
收藏  |  浏览/下载：40/0  |  提交时间：2013/03/25
The main methods to measure the target IR features are the following two ways: test and then measurement  or theoretical and simulation calculation. The former is direct measurement so the results are more accurate but the test is costly and complicated  so that it is limited in the application. Theoretical and simulation calculation are widely used in the target IR radiation calibration. Here we give the basic configuration of the calibration platform for measuring the IR radiation of the large area low temperature blackbody source  and discuss the calibration flowchart and key technologies for atmospheric transmission correction. The dynamic data are analyzed in real time to determine the IR radiation features in the data fusion subsystem  and the experimental results show that the calibration method is feasible and practical. 2010 IEEE.