2篇
您的检索式：作者名="AN Wanqing"
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| 1 | 基于激光三角法的电装后PCB成像系统设计显示文摘With the increasing miniaturisation and integration of electronic products and the increase of heat, it is necessary to design and introduce heat sinks and install fans. The volume of electronic components, especially the height, is very important for the structural and thermal design of electronic devices. This paper presents a design scheme of an online height measurement device based on laser triangulation and commercial charge coupled device(CCD). It analyzes the principles of electronic component height measurement, and expounds the composition and working principle of the laser measurement system. In addition, the commonly used methods to determine the center position are compared and analysed. These methods include circle fitting, gray centroid and extension method or Gaussian fitting. These methods usually lead to different results. The experimental results show that the fitting speed of the gray centroid is faster. The 3 D model of components is given through measurement, and the error factors affecting measurement are analysed. | LIU Qingfeng LI Bo WANG Qi ZHAO Sheng AN Wanqing SU Xinming LIU Xiaoning ZHU Xi | 2021 | Aerospace China2021，22，4： | 0 |
| 2 | Combined genome-wide association studies and expression quantitative trait locus analysis uncovers a genetic regulatory network of floral organ number in a tree peony (Paeonia suffruticosa Andrews) breeding population显示文摘Great progress has been made in our understanding of floral organ identity determination and its regulatory network in many species;however,the quantitative genetic basis of floral organ number variation is far less well understood for species-specific traits from the perspective of population variation.Here,using a tree peony(Paeonia suffruticosa Andrews,Paeoniaceae)cultivar population as a model,the phenotypic polymorphism and genetic variation based on genome-wide association studies(GWAS)and expression quantitative trait locus(eQTL)analysis were analyzed.Based on 24 phenotypic traits of 271 representative cultivars,the transcript profiles of 119 cultivars were obtained,which indicated abundant genetic variation in tree peony.In total,86 GWAS-related cis-eQTLs and 3188 trans-eQTL gene pairs were found to be associated with the numbers of petals,stamens,and carpels.In addition,19 floral organ number-related hub genes with 121 cis-eQTLs were obtained by weighted gene co-expression network analysis,among which five hub genes belonging to the ABCE genes of the MADS-box family and their spatial–temporal co-expression and regulatory network were constructed.These results not only help our understanding of the genetic basis of floral organ number variation during domestication,but also pave the way to studying the quantitative genetics and evolution of flower organ number and their regulatory network within populations. | Liping Peng Yang Li Wanqing Tan Shangwei Wu Qing Hao Ningning Tong Zhanying Wang Zheng’an Liu Qingyan Shu | 2023 | Horticulture Research2023，10，7： | 0 |
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