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近30年中国东北地区玉米种植体系的时空动态分析(英文)  CNKI文献

Understanding crop patterns and their changes on regional scale is a critical requirement for projecting agro-ecosystem dynamics. However, tools and methods for mapping the distribution of crop area ...

谭杰扬 杨鹏... 《Journal of Geographical Sciences》 2014年03期 期刊

关键词: spring / maize / spatial / production

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Reduced-rank space-time adaptive detection for airborn...  CNKI文献

For airborne radar,there are usually insufficient independent and identically distributed(IID)training data because of geometric considerations and terrain variations.The rank reduction technique is ...

WANG YongLiang LIU WeiJian... 《Science China(Information Sciences)》 2014年08期 期刊

关键词: airborne / radar / constant / false

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A Review of Atmospheric Chemistry Research in China:Ph...  CNKI文献

In this paper we present a review of atmospheric chemistry research in China over the period 2006-2010, focusing on tropospheric ozone, aerosol chemistry, and the interactions between trace gases and...

马建中 徐晓斌... 《Advances in Atmospheric Sciences》 2012年05期 期刊

关键词: ozone / aerosols / photochemical / smog

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Combining sum-difference and auxiliary beams for adapt...  CNKI文献

Only in the presence of sidelobe jamming(SLJ),can the conventional adaptive monopulse technique null the jamming effectively and maintain the monopulse angle estimation accuracy simultaneously.While ...

Rongfeng Li Can Rao... 《Journal of Systems Engineering and Electronics》 2013年03期 期刊

关键词: adaptive / beamforming / auxiliary / beam

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Parameter estimation of chirp signal under low SNR  CNKI文献

Aiming at solving the problem of great difficulty and low accuracy existing in parameter estimation of chirp signal under low signal-to-noise ratio(SNR) condition, an algorithm of accurate parameter ...

WANG JinZhen SU ShaoYing... 《Science China(Information Sciences)》 2015年02期 期刊

关键词: chirp / STFT / median / filter

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Observation analysis on characteristics of formation,e...  CNKI文献

An unusual fog and haze event lasted for one week took place during 1–7 December,2011 over North China.To investigate the characteristics and mechanism of formation,evolution,and transition of the f...

GUO LiJun GUO XueLiang... 《Science China Earth Sciences》 2015年03期 期刊

关键词: haze / and / fog / aerosol

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Improved particle filtering techniques based on genera...  CNKI文献

This paper improves the resampling step of particle filtering(PF) based on a broad interactive genetic algorithm to resolve particle degeneration and particle shortage.For target tracking in image pr...

Yan Zhang Shafei Wang... 《Journal of Systems Engineering and Electronics》 2016年01期 期刊

关键词: particle / filtering(PF) / particle / degeneration

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2000–2050年东北三省土地利用时空格局变化过程模拟及其生...  CNKI文献

Land use and its dynamics have attracted considerable scientific attention for their significant ecological and socioeconomic implications.Many studies have investigated the past changes in land use,...

夏天 吴文斌... 《Journal of Geographical Sciences》 2018年11期 期刊

关键词: Northeast / China / land / use

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Establishing Gene Delivery Systems Based on Small-Size...  CNKI文献

Chitosan is a natural cationic polysaccharide,which is often used for preparing biomedical materials because of its high biocompatibility.In this study,chitosan with a molecular weight of 160 k Da wa...

WANG Liping ZHANG Wenhua... 《Journal of Ocean University of China》 2018年05期 期刊

关键词: chitosan / nanoparticles / gene / delivery

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Perovskite thin-film solar cell: excitation in photovo...  CNKI文献

As a new member of thin-film solar cells,the perovskite solar cells have inspired a new research hot in new photoelectric materials and devices,and have given a new energy to the photovoltaic science...

Junyan Xiao Jiangjian Shi... 《Science China Chemistry》 2015年02期 期刊

关键词: perovskite / solar / cell / photovoltaic

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Molecular cloning and functional analysis of the FLOWE...  CNKI文献

FLOWERING LOCUS T(FT) encodes a member of the phosphatidylethanolamine-binding protein(PEBP) family that functions as the mobile floral signal, playing an important role in regulating the floral tran...

Danli Guo Chao Li... 《Journal of Integrative Plant Biology》 2015年06期 期刊

关键词: Cotton / floral / transition / florigen

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神田梯台  CNKI文献

项目名称:神田梯台建筑设计:KEY OPERATION建筑事务所建设地点:日本东京市千代田区建筑结构:钢构架+钢筋混凝土结构、桩基用地面积:154.97m~2建筑基底面积:116.66m~2总楼面面积:986.03m~2结构专业:Delta结构顾问服务设...

《城市建筑》 2018年31期 期刊

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Distribution and risk factors of hand, foot, and mouth...  CNKI文献

Hand,foot,and mouth disease(HFMD)is a public health problem,and there have been increasing numbers of outbreaks in mainland China since 2008.Over17,000 HFMD cases have been reported in Changchun betw...

Li Yan Xinlou Li... 《Chinese Science Bulletin》 2014年Z1期 期刊

关键词: Epidemiology·Geographic / factors·Hand / foot / and

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Estimating the crop leaf area index using hyperspectra...  CNKI文献

The leaf area index(LAI) is an important vegetation parameter,which is used widely in many applications.Remote sensing techniques are known to be effective but inexpensive methods for estimating the ...

LIU Ke ZHOU Qing-bo... 《Journal of Integrative Agriculture》 2016年02期 期刊

关键词: hyperspectral / inversion / leaf / area

下载(87)| 被引(10)

Contour detection improved by frequency domain filteri...  CNKI文献

We propose an intermediate computational step,frequency domain filtering of gradient image,to improve contour detection performance of gradient-based edge detectors.This step is inspired by analyzing...

QU ZhiGuo GAO YingHui... 《Science China(Information Sciences)》 2014年01期 期刊

关键词: edge / detection / contour / detection

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Effects of transparent inorganic pigment on spectral p...  CNKI文献

Transparent inorganic pigment is the color-filler material for manufacturing spectrum-fingerprint anti-counterfeiting fiber, and has great effects on the emission spectral characteristics of the fibe...

张技术 葛明桥 《Journal of Rare Earths》 2012年09期 期刊

关键词: luminescence / pigments / strontium / aluminate

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Comparative analysis of GF-1,HJ-1,and Landsat-8 data f...  CNKI文献

Using simultaneously collected remote sensing data and field measurements,this study firstly assessed the consistency and applicability of China high-resolution earth observation system satellite 1(G...

LI He CHEN Zhong-xin... 《Journal of Integrative Agriculture》 2017年02期 期刊

关键词: GF-1 / WFV / HJ-1 / CCD

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Dynamic analysis of granite rockburst based on the PIV...  CNKI文献

This paper describes the deep rockburst simulation system to reproduce the granite instantaneous rockburst process.Based on the PIV(Particle Image Velocimetry)technique,quantitative analysis of a roc...

Wang Hongjian Liu Da'an... 《International Journal of Mining Science and Technology》 2015年02期 期刊

关键词: Rock / mechanics / Instantaneous / rockburst

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How Could Agricultural Land Systems Contribute to Rais...  CNKI文献

To feed the increasing world population,more food needs to be produced from agricultural land systems.Solutions to produce more food with fewer resources while minimizing adverse environmental and ec...

WU Wen-bin YU Qiang-yi... 《Journal of Integrative Agriculture》 2014年07期 期刊

关键词: agricultural / land / systems / food

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Alzheimer's disease and gut microbiota  CNKI文献

Alzheimer's disease(AD) is a most common neurodegenerative disorder, which associates with impaired cognition. Gut microbiota can modulate host brain function and behavior via microbiota-gut-brai...

Xu Hu Tao Wang... 《Science China(Life Sciences)》 2016年10期 期刊

关键词: Alzheimer's / disease / gut / microbiota

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