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长春光学精密机械与物... [3]
国家授时中心 [2]
清华大学 [1]
成都中医药大学 [1]
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会议论文 [5]
专利 [1]
期刊论文 [1]
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2011 [1]
2010 [3]
2008 [2]
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Study on sub-pixel techniques for accurate image measurement of displacement (EI CONFERENCE)
会议论文
2011 2nd International Conference on Advanced Measurement and Test, AMT 2011, June 24, 2011 - June 26, 2011, Nanchang, China
Xie Z.
;
Zhang X.
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浏览/下载:14/0
  |  
提交时间:2013/03/25
The high resolving power camera was often used to improve the precision of measuring system although its price is high
because the accuracy of image measure was limited by the pixel resolving ability of camera. A method of one dimension gray level quadrature sub-pixel to detect edge was presented. This method was applied to measure the displacement of measuring head on 3-coordinate measuring machine. The data of test was shown that this system can distinguish displacement 0.001mm. it is higher accuracy than pixel level. So this method is convenient and fast
fit to track and measure the moving object. It is obvious that this method can save the cost of hardware.
Preparation of green tapes for LTCC/Cu multilayer substrates
期刊论文
2010, 2010
Yan Wang
;
Yang Liu
;
Jusheng Ma
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浏览/下载:6/0
一种高精度频率综合器的设计与研究
会议论文
第20届测控、计量、仪器仪表学术年会, 中国陕西西安, 2010
杨朝中
;
许林生
;
华宇
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浏览/下载:18/0
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提交时间:2012/10/19
DDS
AD9854
ARM7|Abstract
本文介绍了直接频率合成技术(DDS)的基本原理
设计了一种基于DDS芯片AD9854和ARM7嵌入式微处理器芯片LPC2214的任意频率综合器。它的特点在于在设计的0.1MHz~30MHz范围内可连续输出任意频率
可以最高0.001Hz的频率分辨率输出高精度频率信号。本文分析了输出频率在稳定度和准确度方面的问题
初步提出了解决方案。
Study on chromaticity balance for LED exposure system (EI CONFERENCE)
会议论文
International Symposium on Photoelectronic Detection and Imaging 2007 - Laser, Ultraviolet, and Terahertz Technology, September 9, 2007 - September 12, 2007, Beijing, China
Yao C.-B.
;
Wang S.-Y.
;
Rong X.-W.
;
Meng Z.
;
Sun W.-J.
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浏览/下载:14/0
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提交时间:2013/03/25
A standard white light compounding algorithm based on combination of CCD illumination acquisition with computer control is presented for LEDs. The computer adjust and control the working current of LEDs by using three-color LEDs illumination acquired by CCD camera
achieved chromaticity coordinates error between compounded white light and standard white light D65 less than the threshold beforehand setted by this technique
then acquiring needed standard white light. Compounded white light meet the chromaticity error demand that is able to be changed
at the same time the CCD illumination acquisition system is eliminated. The proposed algorithm improved the light energy utilization efficiency of LED
and eliminated the offset of central wavelength and chromaticity coordinates due to work current change of LEDs. Experimental results show that the proposed algorithm achieved lesser chromaticity error uv=0.001 relative to standard white light D65
enhanced chromaticity uniformity of illumination field.
Study on chroma balance based on grating spectrometer for LED (EI CONFERENCE)
会议论文
Light-Emitting Diode Materials and Devices II, November 12, 2007 - November 14, 2007, Beijing, China
Sun W.-J.
;
Wang S.-Y.
;
Yin Y.-Z.
;
Rong X.-W.
;
Meng Z.
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浏览/下载:20/0
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提交时间:2013/03/25
A standard white light compounding algorithm based on combination of choma coordinates acquisition system with computer working current control system is presented for three-color LED. The chroma coordinates acquisition system consist of grating spectrometer and integrating sphere. The computer adjust and control the working current of three-color LED
then achieved chroma coordinates error between the compounded white light and standard white light D65
until the chroma coordinates is less than the threshold beforehand set by this technique. The compounded white light meet the chroma error demanded that is able to be changed
at the same time the chroma coordinates acquisition system and the working current control system are eliminated. The proposed algorithm the offset of central wavelength and the change of chroma coordinates due to working current variety for LEDs. Experimental results show that the proposed algorithm achieved lesser chroma error uv=0.001 relative to standard white light D65
enhanced chroma uniformity of illumination field.
一种玫瑰花果冻及其制备方法
专利
公开日期: 2018
作者:
李美凤[1]
;
陈艳[1]
;
任栓汕[1]
;
郭力[1]
;
王雪梅[1]
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  |  
浏览/下载:3/0
  |  
提交时间:2019/12/06
玫瑰花果冻
制备方法
休闲
甜味剂
花苞
前景
柠檬酸
维生素
花瓣
及其
含有
制成
配比
食用
适宜
提供
0.1
0.001
亮丽
0.5
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