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High resolution satellite imaging sensors for precision agriculture
Chenghai YANG
《农业科学与工程前沿(英文)》 2018年 第5卷 第4期 页码 393-405 doi: 10.15302/J-FASE-2018226
The central concept of precision agriculture is to manage within-field soil and crop growth variability for more efficient use of farming inputs. Remote sensing has been an integral part of precision agriculture since the farming technology started developing in the mid to late 1980s. Various types of remote sensors carried on ground-based platforms, manned aircraft, satellites, and more recently, unmanned aircraft have been used for precision agriculture applications. Original satellite sensors, such as Landsat and SPOT, have commonly been used for agricultural applications over large geographic areas since the 1970s, but they have limited use for precision agriculture because of their relatively coarse spatial resolution and long revisit time. Recent developments in high resolution satellite sensors have significantly narrowed the gap in spatial resolution between satellite imagery and airborne imagery. Since the first high resolution satellite sensor IKONOS was launched in 1999, numerous commercial high resolution satellite sensors have become available. These imaging sensors not only provide images with high spatial resolution, but can also repeatedly view the same target area. The high revisit frequency and fast data turnaround time, combined with their relatively large aerial coverage, make high resolution satellite sensors attractive for many applications, including precision agriculture. This article will provide an overview of commercially available high resolution satellite sensors that have been used or have potential for precision agriculture. The applications of these sensors for precision agriculture are reviewed and application examples based on the studies conducted by the author and his collaborators are provided to illustrate how high resolution satellite imagery has been used for crop identification, crop yield variability mapping and pest management. Some challenges and future directions on the use of high resolution satellite sensors and other types of remote sensors for precision agriculture are discussed.
关键词: high resolution satellite sensor multispectral imagery precision agriculture spatial resolution temporal resolution
Li-gang MA,Jin-song DENG,Huai YANG,Yang HONG,Ke WANG
《信息与电子工程前沿(英文)》 2015年 第16卷 第3期 页码 238-248 doi: 10.1631/FITEE.1400083
关键词: ZY-1 02C satellite Classification Urban Multi-variable model
A thermally flexible and multi-site tactile sensor for remote 3D dynamic sensing imaging
Guoting Xia, Yinuo Huang, Fujiang Li, Licheng Wang, Jinbo Pang, Liwei Li, Kai Wang
《化学科学与工程前沿(英文)》 2020年 第14卷 第6期 页码 1039-1051 doi: 10.1007/s11705-019-1901-5
关键词: tactile/thermal sensor piezoelectric/pyroelectric effects high resolution spatial mapping motion monitoring
《环境科学与工程前沿(英文)》 2022年 第16卷 第4期 doi: 10.1007/s11783-021-1478-3
The Large scale Urban Consumption of energ Y model was updated and coupled with WRF.
关键词: Anthropogenic heat emissions LUCY High-resolution Meteorological parameters Air quality
Efficient, high-resolution topology optimization method based on convolutional neural networks
Liang XUE, Jie LIU, Guilin WEN, Hongxin WANG
《机械工程前沿(英文)》 2021年 第16卷 第1期 页码 80-96 doi: 10.1007/s11465-020-0614-2
关键词: topology optimization convolutional neural network high resolution density-based
Hassan YOUSEFI, Alireza TAGHAVI KANI, Iradj MAHMOUDZADEH KANI
《结构与土木工程前沿(英文)》 2019年 第13卷 第2期 页码 429-455 doi: 10.1007/s11709-018-0483-5
关键词: central high resolution schemes RBFs higher order accuracy generalized thermoelasticity multiresolution-based adaptation
遥感和精准农业技术在作物病害检测与管理中的应用实例 Review
杨成海
《工程(英文)》 2020年 第6卷 第5期 页码 528-532 doi: 10.1016/j.eng.2019.10.015
长期以来,遥感技术一直被应用于作物病害的检测和地图绘制工作。在作物生长季节获得的机载和卫星图像不仅可以用于某些病害的早期发现和季节内管理,还可用于未来季节中复发性病害的管控。尽管传统的地毯式杀虫剂施用更适于对付能够迅速在田间传播的病害,然而,在作物病害稳定的情况下,精准农业中的变量控制技术(VRT)亦可以有针对性地对受感染地区的作物有效施用杀菌剂。本文简述了已用于作物病害检测和管理的遥感技术和精准农业技术。具体来说,本文详细阐明了利用机载技术、卫星图像和VRT在棉田中检测棉花根腐病(一种破坏性的土壤传播性真菌病)和绘制分布地图的原理,介绍了从图像中提取处方图以施用定点杀菌剂并有效控制作物病害的方法。本文介绍的案例和方法力图为研究人员、推广人员、种植者、作物顾问、农场设备和化学品经销商提供有关遥感检测和有效管理某些作物病害的实用指南。
Hamed BOLANDI; Xuyang LI; Talal SALEM; Vishnu Naresh BODDETI; Nizar LAJNEF
《结构与土木工程前沿(英文)》 2022年 第16卷 第11期 页码 1365-1377 doi: 10.1007/s11709-022-0882-5
关键词: Deep Learning finite element analysis stress contours structural components
黄磊,周武,李延民
《中国工程科学》 2014年 第16卷 第6期 页码 65-69
星载微波辐射计多通道海洋参数反演需要基于同一位置、同一分辨率的多通道观测值,但由于星载微波辐射计设计的局限性,多通道观测地面像元位置和分辨率均不同,因此运用多通道分辨率匹配技术统一观测面元是扫描微波辐射计数据处理中的关键技术,基于海洋二号(HY-2)卫星扫描微波辐射计的成像原理和天线方向图,模拟各通道天线方向图在地面的投影,用Backus-Gilbert(BG)算法将高频观测亮温重采样到最低的低频6.6 GHz通道的观测位置和像元分辨率。结果表明,BG降低分辨率重采样算法能得到很好的拟合效果,并且不另引入噪声。
联合卫星重力、卫星测高及陆地重力异常构建高分辨率地球重力场模型SGG-UGM-2 Article
梁伟, 李建成, 徐新禹, 张胜军, 赵永奇
《工程(英文)》 2020年 第6卷 第8期 页码 860-878 doi: 10.1016/j.eng.2020.05.008
本文采用椭球谐分析方法构建了一个新的2190阶地球重力场模型SGG-UGM-2,使用的数据包括卫星重力观测数据[重力场与海洋环流探测卫星(Gravity Field and Steady-State Ocean Circulation Explorer, GOCE)和重力场与气候实验卫星(Gravity Recovery and Climate Experiment, GRACE)]、卫星测高数据和EGM2008 (Earth Gravitational Model 2008)模型重力异常数据。首先,基于椭球谐分析和系数转换方法(ellipsoidal harmonic analysis and coefficient transformation, EHA-CT),推导了适用于点值和均值重力异常的一套严密积分公式和最小二乘计算公式,改正了Rapp和Pavlis 1990年积分公式中的错误,并通过数值模拟试验证明了本文推导公式的严密性。然后,使用GOCE、GRACE、多代卫星测高数据和EGM2008重力异常数据计算了2190阶2159次的重力场模型SGGUGM-2,其中251阶到2190阶2159次模型系数是用全球地面重力异常数据集(包含海洋重力数据)采用块对角最小二乘方法解算,而2~250阶系数是联合卫星(GRACE和GOCE)和地面重力异常法方程采用严格最小二乘法计算,并采用方差分量估计方法确定不同观测数据的相对权。最后,使用中国和美国区域的全球定位系统(global positioning system, GPS)/水准数据对模型进行了检核。结果表明,SGG-UGM-2与国际权威模型EIGEN-6C4的精度相当,在中国的精度明显优于EGM2008,整体精度优于GECO模型,与SGG-UGM-1模型相比,其精度在中国和美国均有提升。
从中国首台紫外-可见光高光谱卫星仪器反演得到的高空间分辨率臭氧廓线 Article
Fei Zhao, Cheng Liu, Qihou Hu, Congzi Xia, Chengxin Zhang, Wenjing Su
《工程(英文)》 2024年 第32卷 第1期 页码 107-116 doi: 10.1016/j.eng.2023.02.020
Understanding the vertical distribution of ozone is crucial when assessing both its horizontal and vertical transport, as well as when analyzing the physical and chemical properties of the atmosphere. One of the most effective ways to obtain high spatial resolution ozone profiles is through satellite observations. The Environmental Trace Gases Monitoring Instrument (EMI) deployed on the Gaofen-5 satellite is the first Chinese ultraviolet-visible hyperspectral spectrometer. However, retrieving ozone profiles using backscattered radiance values measured by the EMI is challenging due to unavailable measurement errors and a low signal-to-noise ratio. The algorithm developed for the Tropospheric Monitoring Instrument did not allow us to retrieve 87% of the EMI pixels. Therefore, we developed an algorithm specific to the characteristics of the EMI. The fitting residuals are smaller than 0.3% in most regions. The retrieved ozone profiles were in good agreement with ozonesonde data, with maximum mean biases of 20% at five latitude bands. By applying EMI averaging kernels to the ozonesonde profiles, the integrated stratospheric column ozone and tropospheric column ozone also showed excellent agreement with ozonesonde data. The lower layers (0–7.5 km) of the EMI ozone profiles reflected the seasonal variation in surface ozone derived from the China National Environmental Monitoring Center (CNEMC). However, the upper layers (9.7–16.7 km) of the ozone profiles show different trends, with the ozone peak occurring at an altitude of 9.7–16.7 km in March. A stratospheric intrusion event in central China from August 11 to 15, 2019, is captured using the EMI ozone profiles, potential vorticity data, and relative humidity data. The increase in the CNEMC ozone concentration showed that downward transport enhanced surface ozone pollution.
关键词: Ozone profiles EMI Soft calibration Floor noise correction Stratospheric ozone intrusion
赵玉龙,牛 喆,周冠武,赵立波,蒋庄德
《中国工程科学》 2013年 第15卷 第1期 页码 99-105
针对油气田特殊环境要求,介绍了一种高温高压传感器芯片的设计及加工制造方法,并研发了相关的高性能数字变送系统。所设计的高温高压传感器芯片解决了传统压阻式传感器在高温高压环境下的热稳定性问题,通过数字补偿技术进一步提升了其系统的线性度与精度,并针对油气田监测环境扩展了其相关外围设备。同时,为了适应油气田管监测理要求,设计了相关无线传感网络,以确保其工业生产的高效运行和有效控制。通过具体实验测试数据,验证了该油气田监测高性能微传感器及数字化系统的高精度及高可靠性,该系统的精度达到0.2 % FS及以上,达到世界先进水平,对国内的石化工业发展有着非常重要的意义。
Tingzhong XU, Hongyan WANG, Yong XIA, Zhiming ZHAO, Mimi HUANG, Jiuhong WANG, Libo ZHAO, Yulong ZHAO, Zhuangde JIANG
《机械工程前沿(英文)》 2017年 第12卷 第4期 页码 546-553 doi: 10.1007/s11465-017-0447-9
A novel micro-electromechanical systems piezoresistive pressure sensor with a diagonally positioned peninsula-island structure has high sensitivity for ultra-low-pressure measurement. The pressure sensor was designed with a working range of 0–500 Pa and had a high sensitivity of 0.06 mV·V−1·Pa−1. The trade-off between high sensitivity and linearity was alleviated. Moreover, the influence of the installation angle on the sensing chip output was analyzed, and an application experiment of the sensor was conducted using the built pipettor test platform. Findings indicated that the proposed pressure sensor had sufficient resolution ability and accuracy to detect the pressure variation in the pipettor chamber. Therefore, the proposed pressure sensor has strong potential for medical equipment application.
关键词: MEMS low pressure sensor peninsula-island ultra-high sensitivity medical application
广域电磁法和拟流场法精细探测技术——以井工一矿水害探测为例 Article
何继善
《工程(英文)》 2018年 第4卷 第5期 页码 667-675 doi: 10.1016/j.eng.2018.09.006
井工一矿存在严重的老空区和水害。以往的单一勘探方法,如地震法、直流电法、音频大地电磁法、可控源音频大地电磁法、瞬变电磁法等,均未能探明老采空区范围和水害赋存情况。为了解决这个难题,联合采用广域电磁法和井- 地拟流场法的三位一体立体式探测技术,并利用三维反演电阻率资料精准获取富水区域和采空区的位置,确定了不同层位水的连通性,为井工一矿的安全生产提供了可靠的技术保障。结果合理、成效显著,释放了近4 km2 的可采面积。
王桂忠,张杰,苗洪利,李国强,王鑫
《中国工程科学》 2014年 第16卷 第6期 页码 60-64
有效波高是描述海况的重要参量之一,利用高度计遥感获取有效波高已在海洋研究中获得广泛应用。本文基于海洋二号(HY-2)卫星高度计波形数据,发展了一种高分辨率有效波高反演算法,采用中误差对反演得到的20 Hz有效波高进行筛选,有效提高了测量精度。通过该方法对1 个轨的波形数据进行有效波高反演,统计结果表明:与针对1 s 回波反演的有效波高比较,利用该方法可将有效波高观测分辨率提高约15 倍,精度约为0.44 m;利用HY-2 高度计20 Hz 波形数据反演的有效波高精度可靠,可用其进行高分辨率的相关海洋研究。
标题 作者 时间 类型 操作
Urban landscape classification using Chinese advanced high-resolution satellite imagery and an object-oriented
Li-gang MA,Jin-song DENG,Huai YANG,Yang HONG,Ke WANG
期刊论文
A thermally flexible and multi-site tactile sensor for remote 3D dynamic sensing imaging
Guoting Xia, Yinuo Huang, Fujiang Li, Licheng Wang, Jinbo Pang, Liwei Li, Kai Wang
期刊论文
Impact of anthropogenic heat emissions on meteorological parameters and air quality in Beijing using a high-resolution
期刊论文
Efficient, high-resolution topology optimization method based on convolutional neural networks
Liang XUE, Jie LIU, Guilin WEN, Hongxin WANG
期刊论文
Multiscale RBF-based central high resolution schemes for simulation of generalized thermoelasticity problems
Hassan YOUSEFI, Alireza TAGHAVI KANI, Iradj MAHMOUDZADEH KANI
期刊论文
Bridging finite element and deep learning: High-resolution stress distribution prediction in structural
Hamed BOLANDI; Xuyang LI; Talal SALEM; Vishnu Naresh BODDETI; Nizar LAJNEF
期刊论文
从中国首台紫外-可见光高光谱卫星仪器反演得到的高空间分辨率臭氧廓线
Fei Zhao, Cheng Liu, Qihou Hu, Congzi Xia, Chengxin Zhang, Wenjing Su
期刊论文
Piezoresistive pressure sensor with high sensitivity for medical application using peninsula-island structure
Tingzhong XU, Hongyan WANG, Yong XIA, Zhiming ZHAO, Mimi HUANG, Jiuhong WANG, Libo ZHAO, Yulong ZHAO, Zhuangde JIANG
期刊论文