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多孔径光学成像系统及其光场采集数学模型 Review Article
祁启明,傅瑞罡,邵铮铮,王平,范红旗
《信息与电子工程前沿(英文)》 2022年 第23卷 第6期 页码 823-844 doi: 10.1631/FITEE.2100058
受昆虫复眼启发,为提高光学成像质量,如获得高分辨率图像或大视场图像,研究者提出了许多多孔径光学成像系统。光场采集数学模型是联系多孔径光学成像系统结构设计与应用的纽带,但光场采集数学模型较少被关注。本文系统梳理了典型多孔径光学成像系统(仿生复眼、光场相机、相机阵列),总结了不同结构下多孔径光学成像系统的一般性光场采集数学模型。列出的数学模型既可用于计算特定多孔径光学成像系统的关键指标,如视场大小和子图像重叠比等,也可作为数学工具,便于研究者完成对成像系统的定量设计与评估。
Development of real-time onion disease monitoring system using image acquisition
Du-Han KIM, Kyeong-Hwan LEE, Chang-Hyun CHOI, Tae-Hyun CHOI, Yong-Joo KIM
《农业科学与工程前沿(英文)》 2018年 第5卷 第4期 页码 469-474 doi: 10.15302/J-FASE-2018213
In this study, real-time disease monitoring was conducted on onion which is the most representative crop in Republic of Korea, using an image acquisition system newly developed for the mobile measurement of phenotype. The purpose of this study was to improve the accuracy of prediction of disease and state variables by processing images acquired from monitoring. The image acquisition system was consisted of two parts, a motorized driving system and a PTZ (pan, tilt and zoom) camera to take images of the plants. The acquired images were processed as follows. Noise was removed through an image filter and RGB (red, green and blue) colors were converted to HSV (hue, saturation and value), which enabled thresholding of areas with different colors and properties for image binarization by comparing the color of onion leaf with ambient areas. Four objects with the most significant browning in the onion leaf to the naked eye were selected as the samples for data acquired. The thresholding method with image processing was found to be superior to the naked eye in identifying accurate disease areas. In addition, it was found that the incidence of disease was different in each disease area ratio. As a result, the use of image acquisition system in image processing analysis will enable more prompt detection of any changes in the onion and monitoring of disease outbreaks during the crop lifecycle.
Fei Zhang,Minghao Liao,Mingbo Pu,Yinghui Guo,Lianwei Chen,Xiong Li,Qiong He,Tongtong Kang,Xiaoliang Ma,Yuan Ke,Xiangang Luo,
《工程(英文)》 doi: 10.1016/j.eng.2023.07.008
Analysis and control of micro-stepping characteristics of ultrasonic motor
Ning CHEN, Jieji ZHENG, Xianliang JIANG, Shixun FAN, Dapeng FAN
《机械工程前沿(英文)》 2020年 第15卷 第4期 页码 585-599 doi: 10.1007/s11465-019-0577-3
关键词: ultrasonic motor stepping characteristics pulse number control synchronous acquisition system precise positioning
李忠民,魏一鸣,汤淑春,陈健
《中国工程科学》 2006年 第8卷 第6期 页码 95-99
在对国外广泛采用的风险矩阵评估方法进行全面分析和系统总结的基础上,对风险矩阵方法在我国武器装备采办风险评估中的运用进行了探讨,并从风险影响和风险概率两个准则入手,以某武器型号采办为例示范性地进行了风险评估,从而为制定科学合理的武器装备采办风险管理提供决策依据。
evaluation of renal function using diffusion weighted imaging and diffusion tensor imaging in type 2
null
《医学前沿(英文)》 2014年 第8卷 第4期 页码 471-476 doi: 10.1007/s11684-014-0365-8
This work aims to estimate the value of diffusion weighted imaging (DWI) and diffusion tensor imaging (DTI) in detecting early-stage kidney injury in type 2 diabetic patients with normoalbuminuria (NAU) versus microalbuminuria (MAU) prospectively. A total of 30 T2DM patients with normal kidney function were recruited and assigned to the NAU group (n = 14) or MAU group (n= 16) according to 8 h overnight urinary albuminuria excretion rate (AER) results. A contemporary cohort of health check-up recipients were included as controls (n = 12). DWI and DTI scans were performed on bilateral kidney using SE single-shot EPI, and apparent diffusion coefficient (ADC) and fractional anisotropy (FA) of the renal parenchyma was determined from ADC and FA maps of the three groups. ADC and FA values were compared among the three groups. According to DWI with a b value of 400 s/mm2, the MAU and NAU groups showed significantly lowered mean ADC values compared with the healthy controls (P<0.01). The mean ADC in the MAU group [(2.22±0.07)×10–3 mm2/s] was slightly lower than that of the NAU group [(2.31±0.22)×10–3 mm2/s], but this difference was not statistically significant (P>0.05). The FA value in the MAU group was higher than that in the control group (0.45±0.07 vs. 0.39±0.03, P = 0.004) but did not differ from that in the NAU group (0.42±0.03) (P>0.05). ADC and FA values may be more sensitive than urine AER in reflecting early-stage kidney injury and, hence, may facilitate earlier detection and quantitative evaluation of kidney injury in T2DM patients. Combined evaluation of ADC and FA values may provide a better quantitative approach for identifying diabetic nephropathy at early disease stages.
关键词: type 2 diabetes mellitus microalbuminuria diffusion weighted imaging diffusion tensor imaging early-stage kidney injury
Quality control based on electrode displacement and force in resistance spot welding
Chuntao JI, Lipeng DENG
《机械工程前沿(英文)》 2010年 第5卷 第4期 页码 412-417 doi: 10.1007/s11465-010-0114-x
关键词: aluminum electrode displacement electrode force nugget size data acquisition
Carbon dots-based fluorescence sensor for two-photon imaging of pH in diabetic mice
《化学科学与工程前沿(英文)》 2023年 第17卷 第3期 页码 298-306 doi: 10.1007/s11705-022-2212-9
In vivo imaging of hematopoietic stem cell development in the zebrafish
Panpan Zhang, Feng Liu
《医学前沿(英文)》 2011年 第5卷 第3期 页码 239-247 doi: 10.1007/s11684-011-0123-0
关键词:
hematopoietic stem cell
hematopoiesis
刘志强,李娜,郭健 ,冯良平,宋刚
《中国工程科学》 2010年 第12卷 第7期 页码 101-106
采用“西堠门大桥结构监测系统的设计与实现(I):系统设计”中的设计方法,为西堠门大桥设计并实现桥梁结构监测系统。研究西堠门大桥结构监测系统的总体设计方案、子系统的设计方案及其软硬件的实现。分析西堠门大桥结构监测系统在运营中监测的桥梁荷载和结构响应。研究结果表明,西堠门大桥结构监测系统正常运行,实现了预期设计功能,基于工业以太网分布式数据采集与传输系统在桥梁结构监测系统中得以成功应用,可在其他工程中加以推广。
Anefficient quadrature demodulator for medical ultrasound imaging
Hao ZHOU,Yin-fei ZHENG
《信息与电子工程前沿(英文)》 2015年 第16卷 第4期 页码 301-310 doi: 10.1631/FITEE.1400205
关键词: B-mode ultrasound imaging Color flow imaging Quadrature demodulation Finite impulse response filter
光场成像技术:模型、标定、重建及应用 Review
Hao ZHU, Qing WANG, Jingyi YU
《信息与电子工程前沿(英文)》 2017年 第18卷 第9期 页码 1236-1249 doi: 10.1631/FITEE.1601727
关键词: 光场成像;全光函数;成像模型;标定;重建
Weiwei CHEN, Jianpin QI, Wenzhen ZHU, Wenhua HUANG, Jinmei SONG
《医学前沿(英文)》 2009年 第3卷 第2期 页码 230-235 doi: 10.1007/s11684-009-0023-8
关键词: computed tomography angiography computed tomography perfusion
Liangqian Tong, Ming Zhao, Shu Zhu, Jing Chen
《医学前沿(英文)》 2011年 第5卷 第4期 页码 379-387 doi: 10.1007/s11684-011-0162-6
关键词: nanoparticles superparamagnetic iron oxide targeted therapy molecular imaging cancer
《化学科学与工程前沿(英文)》 2022年 第16卷 第1期 页码 103-111 doi: 10.1007/s11705-021-2064-8
关键词: UDP-glucuronosyltransferase 1A8 fluorescent probe subtype selectivity fluorescence imaging
标题 作者 时间 类型 操作
Development of real-time onion disease monitoring system using image acquisition
Du-Han KIM, Kyeong-Hwan LEE, Chang-Hyun CHOI, Tae-Hyun CHOI, Yong-Joo KIM
期刊论文
A Miniature Meta-Optical System for Reconfigurable Wide-Angle Imaging and Polarization-Spectral Detection
Fei Zhang,Minghao Liao,Mingbo Pu,Yinghui Guo,Lianwei Chen,Xiong Li,Qiong He,Tongtong Kang,Xiaoliang Ma,Yuan Ke,Xiangang Luo,
期刊论文
Analysis and control of micro-stepping characteristics of ultrasonic motor
Ning CHEN, Jieji ZHENG, Xianliang JIANG, Shixun FAN, Dapeng FAN
期刊论文
evaluation of renal function using diffusion weighted imaging and diffusion tensor imaging in type 2
null
期刊论文
Quality control based on electrode displacement and force in resistance spot welding
Chuntao JI, Lipeng DENG
期刊论文
Simultaneous acquisition of CT angiography and whole brain CT perfusion images by using multiphase dynamic
Weiwei CHEN, Jianpin QI, Wenzhen ZHU, Wenhua HUANG, Jinmei SONG
期刊论文
Synthesis and application of superparamagnetic iron oxide nanoparticles in targeted therapy and imaging
Liangqian Tong, Ming Zhao, Shu Zhu, Jing Chen
期刊论文