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Effects of shading stress during the reproductive stages on photosynthetic physiology and yield characteristics of peanut(Arachis hypogaea Linn.)

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Journal of Integrative Agriculture 2021年第5期20卷 1250-1265页

作者： wang yi-bo HUANG Rui-dong ZHOU Yu-fei Agricultural College Shenyang Agricultural UniversityShenyang 110866P.R.China

In intercropping systems,high-positioned crops often exert shading stress on low-positioned crops,thus affecting the agronomic characteristics of the low-positioned *** study determined the mechanisms of photosynthetic,physiological and yield variations among peanut cultivars under shading *** peanut cultivars,S60,C4,P12,and YS151,were grown in the field and subjected to shading stress for 77 days during reproductive stages.S60 and P12 showed lower yield and reduced biomass accumulation than C4 and YS151 under shading *** stress induced higher antioxidant enzyme activities in S60 and P12,relative to C4 and *** shading stress,S60 and P12 showed a higher lighttrapping capability than C4 and YS151,which was associated with changes in chlorophyll(Chl)a and b contents,and Chl a/b *** net photosynthetic rate,stomatal conductance and transpiration rates of C4 and YS151 were decreased,but the intercellular CO_(2)concentration increased under shading *** results demonstrated that non-stomatal limiting factors decreased the photosynthetic capacity of peanut under shading *** maximum photochemical efficiency of PSII(F_(v)/F_(m))and non-photochemical quenching(NPQ)were higher in S60 and P12 than in C4 and YS151 under shading *** results suggest that S60 and P12 could absorb more light energy from weak light environments for photosynthesis than C4 and YS151 and dissipate the excess energy in the form of heat to improve their light protection *** study explains the inter-variety differences in shading stress tolerance in peanut and provides physiological parameters for guiding the selection of shade-tolerant cultivars.

关键词： peanut shading antioxidant enzyme system photosynthesis fluorescence yield

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The Influence of Seasonal Snow on Soil Thermal and Water Dynamics under Different Vegetation Covers in a Permafrost Region

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Journal of Mountain Science 2014年第3期11卷 727-745页

作者： HANG Juan wang Gen-xu GAO Yong-heng wang yi-bo College of Earth and Environmental Sciences Lanzhou University Institute of Mountain Hazards and Environment Chinese Academy of Sciences

Seasonal snow is one of the most important influences on the development and distribution of permafrost and the hydrothermal regime in surface soil. Alpine meadow, which constitutes the main land type in permafrost regions of the Qinghai-Tibet Plateau, was selected to study the influence of seasonal snow on the temperature and moisture in active soil layers under different vegetation coverage. Monitoring sites for soil moisture and temperature were constructed to observe the hydrothermal processes in active soil layers under different vegetation cover with seasonal snow cover variation for three years from 2010 to 2012. Differences in soil temperature and moisture in areas of diverse vegetation coverage with varying levels of snow cover were analyzed using active soil layer water and temperature indices. The results indicated that snow cover greatly influenced the hydrothermal dynamics of the active soil layer in alpine meadows. In the snow manipulation experiment with a snow depth greater than 15 cm, the snow cover postponed both the freeze-fall and thawrise onset times of soil temperature and moisture in alpine LC(lower vegetation coverage) meadows and of soil moisture in alpine HC(higher vegetation coverage) meadows; however, the opposite response occurred for soil temperatures of alpine HC meadows,where the entire melting period was extended by advancing the thaw-rise and delaying the freeze-fall onset time of the soil temperature. Snow cover resulted in a decreased amplitude and rate of variation in soil temperature, for both alpine HC meadows and alpine LC meadows, whereas the distinct influence of snow cover on the amplitude and rate of soil moisture variation occurred at different soil layers with different vegetation coverages. Snow cover increased the soil moisture of alpine grasslands during thawing periods. The results confirmed that the annual hydrothermal dynamics of active layers in permafrost were subject to the synergistic actions of both snow cover

关键词： Permafrost Snow cover Vegetationcover Active soil layer Hydrothermal dynamics Synergistic action

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Phase and Defect Engineering of GeTe-based Alloys for High Thermoelectric Performance

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Chinese Journal of Structural Chemistry 2020年第5期39卷 821-830页

作者： ZHANG Chao-Hua wang yi-bo LI Jun-Qin LIU Fu-Sheng College of Materials Science and Engineering Shenzhen Key Laboratory of Special Functional MaterialsShenzhen Engineering Laboratory for Advanced Technology of CeramicsGuangdong Research Center for Interfacial Engineering of Functional MaterialsInstitute of Deep Underground Sciences and Green EnergyShenzhen UniversityShenzhen 518060China

The widespread applications of thermoelectric(TE)materials in power generation and solid-state cooling require improving their TE figure of merit(ZT)***,GeTe-based alloys have shown great promise as mid-temperature TE materials with superhigh TE performance,mostly due to their relatively high-degeneracy band structures and low lattice thermal *** this perspective,we review the most recent progress of the GeTe-based TE alloys from the view of phase and defect *** two strategies are the most widely-used and efficient approaches in GeTe-based alloys to optimize the transport properties of electrons and phonons for high *** phase transition from rhombohedral to cubic structure is believed to improve the band convergence of GeTe-based alloys for higher electrical *** defects in GeTe-based alloys include the point defects from Ge vacancies and substitutional dopants,linear and planar defects from Ge *** defect engineering of GeTe-based alloys is important not only for optimizing the carrier density but also for tuning the band structure and phonon-scattering *** summarized strategies in this review can also be used as a reference for guiding the further development of GeTe-based alloys and also other TE materials.

关键词： GeTe thermoelectric phase defect Ge vacancies

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NuMED CHEATHAM-PLATINUM STENT AND BALLOON IN BALLOON DELIVERY CATHETER FOR TREATMENT OF NATIVE COARCTATION OF THE AORTA

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Chinese Medical Sciences Journal 2006年第1期21卷 65-67页

作者： Guang-yi wang bo Yang Zhi-feng wang Jun Guo Lu-yue Gai Guang Zhi Department of Cardiology General Hospital of People＇s Liberation Army Beijing 100853

COARCTATION of the aorta (CoA) is a congenital heart defect involving a narrowing of the *** narrowed segment called coarctation is most likely to happen in the segment just after the aortic *** narrowing can be removed by surgery or sometimes by a nonsurgical balloon ***, aortic coarctation may recur even after successful surgery or balloon ***, coarctation can now be treated with nonsurgical balloon dilation associated with implanting a stent using cardiac *** we reported our experience in a 19-year-old boy with CoA who underwent successful covered Cheatham-Platinum (CP) stent implantation for the coarctation.

关键词： covered stent coarctation of the aorta catheter intervention

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Super-resolution least-squares prestack Kirchhoff depth migration using the L_0-norm

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Applied Geophysics 2018年第1期15卷 69-77,148,149页

作者： Wu Shao-Jiang wang yi-bo Ma Yue and Chang Xu Key Laboratory of Shale Gas and Geoengineering Institute of Geology and Geophysics Chinese Academy of Sciences Beijing 100029 China University of the Chinese Academy of Sciences Beijing 100049 China Beijing Research Center Aramco China Beijing 100102 China

Least-squares migration （LSM） is applied to image subsurface structures and lithology by minimizing the objective function of the observed seismic and reverse-time migration residual data of various underground reflectivity models. LSM reduces the migration artifacts, enhances the spatial resolution of the migrated images, and yields a more accurate subsurface reflectivity distribution than that of standard migration. The introduction of regularization constraints effectively improves the stability of the least-squares offset. The commonly used regularization terms are based on the L2-norm, which smooths the migration results, e.g., by smearing the reflectivities, while providing stability. However, in exploration geophysics, reflection structures based on velocity and density are generally observed to be discontinuous in depth, illustrating sparse reflectance. To obtain a sparse migration profile, we propose the super-resolution least-squares Kirchhoff prestack depth migration by solving the L0-norm-constrained optimization problem. Additionally, we introduce a two-stage iterative soft and hard thresholding algorithm to retrieve the super-resolution reflectivity distribution. Further, the proposed algorithm is applied to complex synthetic data. Furthermore, the sensitivity of the proposed algorithm to noise and the dominant frequency of the source wavelet was evaluated. Finally, we conclude that the proposed method improves the spatial resolution and achieves impulse-like reflectivity distribution and can be applied to structural interpretations and complex subsurface imaging.

关键词： super-resolution least-squares Kirchhoff depth migration L0-norm regularization

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干涉走时微地震震源定位方法

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地球物理学报 2016年第8期59卷 3037-3045页

作者：王璐琛常旭王一博中国科学院页岩气与地质工程重点实验室中国科学院地质与地球物理研究所北京100029 中国科学院大学北京100049

本文基于地震波场干涉原理,建立了干涉走时微地震震源定位方法.该方法将两个接收点相对于一个微地震事件的走时差(称为干涉走时)的扰动作为残差函数,通过迭代求解最小残差函数,最终获得震源的空间位置.干涉走时震源定位方法利用两个接... 详细信息

本文基于地震波场干涉原理,建立了干涉走时微地震震源定位方法.该方法将两个接收点相对于一个微地震事件的走时差(称为干涉走时)的扰动作为残差函数,通过迭代求解最小残差函数,最终获得震源的空间位置.干涉走时震源定位方法利用两个接收点的到时差消除发震时刻未知和速度模型误差的影响,简化了震源定位算法.数值计算表明,本文提出的干涉走时定位方法在速度模型有误差的情况下仍然可以获得准确的微地震震源定位.

关键词：微地震干涉定位震源反演走时差

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TTI介质的交错网格伪P波正演方法

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地球物理学报 2016年第3期59卷 1046-1058页

作者：王璐琛常旭王一博中国科学院页岩气与地质工程重点实验室中国科学院地质与地球物理研究所北京100029 中国科学院大学北京100049

研究了三维弱各向异性近似下,利用伪P波(伪纵波)模拟弹性波场P分量在倾斜对称轴的横向各向同性(TTI)介质中的传播过程,并对比了分别基于弹性Hooke定律、弹性波投影和运动学色散方程所建立的三种二阶差分伪P波方程的正演特点.目前这些伪... 详细信息

研究了三维弱各向异性近似下,利用伪P波(伪纵波)模拟弹性波场P分量在倾斜对称轴的横向各向同性(TTI)介质中的传播过程,并对比了分别基于弹性Hooke定律、弹性波投影和运动学色散方程所建立的三种二阶差分伪P波方程的正演特点.目前这些伪P波方程数值计算主要采用规则网格差分,但是规则网格在TTI模拟中有低效率、低精度以及不稳定的缺点.为了提高计算的精度,本文构建出相应方程的交错网格有限差分格式.通过对比伪P波方程在三维TTI介质中不同的数值模拟的表达形式,本文认为基于色散方程所建立的伪P波方程在模拟弹性波中P波传播的过程中具有最小的噪声.本文分析不同的各向同性对称轴空间角度的频散特征,并引入适当的横波速度维持计算的稳定.二维模型算例表明,本文提出的交错网格正演算法可以得到稳定光滑的伪P波正演波场.使用本文交错网格算法对二维BP TTI模型的逆时偏移也具有较稳定的偏移结果.

关键词：伪P波倾斜各向异性交错网格

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Application of the improved dung beetle optimizer,muti-head attention and hybrid deep learning algorithms to groundwater depth prediction in the Ningxia area,China

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Atmospheric and Oceanic Science Letters 2025年第1期18卷 18-23页

作者： Jiarui Cai bo Sun Huijun wang yi Zheng Siyu Zhou Huixin Li Yanyan Huang Peishu Zong Collaborative Innovation Center on forecast and Evaluation of Meteorological Disasters/Key Laboratory of Meteorological Disaster Ministry of Education/Joint International Research Laboratory of Climate and Environment ChangeNanjing University of Information Science and TechnologyNanjingChina Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai) ZhuhaiChina China Meteorological Administration Key Laboratory of Transportation MeteorologyNanjingChina Jiangsu Meteorological Observatory NanjingChina

Due to the lack of accurate data and complex parameterization,the prediction of groundwater depth is a chal-lenge for numerical *** learning can effectively solve this issue and has been proven useful in the prediction of groundwater depth in many *** this study,two new models are applied to the prediction of groundwater depth in the Ningxia area,*** two models combine the improved dung beetle optimizer(Dbo)algorithm with two deep learning models:The Multi-head Attention-Convolution Neural Network-Long Short Term Memory networks(MH-CNN-LSTM)and the Multi-head Attention-Convolution Neural Network-Gated Recurrent Unit(MH-CNN-GRU).The models with Dbo show better prediction performance,with larger R(correlation coefficient),RPD(residual prediction deviation),and lower RMSE(root-mean-square error).Com-pared with the models with the original Dbo,the R and RPD of models with the improved Dbo increase by over 1.5%,and the RMSE decreases by over 1.8%,indicating better prediction *** addition,compared with the multiple linear regression model,a traditional statistical model,deep learning models have better prediction performance.

关键词： Groundwater depth Multi-head attention Improved dung beetle optimizer CNN-LSTM CNN-GRU Ningxia

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3D elastic microseismic denoising via noncausal regularized nonstationary filtering

3D elastic microseismic denoising via noncausal regularized ...

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2014年中国地球科学联合学术年会——国际专题（2）Microseismic Monitoring and Inversion

作者： WUShao-Jiang wang yi-bo CHANG Xu Key Laboratory of Engineering Geomechanics Institute of Geology and Geophysics Chinese Academy of Sciences University of Chinese Academy of Sciences

Microseismicnoise attenuation is very important for seismic data analysis and interpretation, especially in the complex 3D anisotropic media. We solve 3D elastic wave equation with VTI media and applynoncausal regularized nonstationaryautoregression(NRNA) in f-x-y domain for noise attenuation. NRNA consider that the central trace can be predicted by all around this trace which can adaptively estimate seismic events of which slopes vary in 3D space from all directions in 3D seismic cube. A shaping regularization technology is added to make the nonstationaryautoregression problem realizable in mathematics with high computational efficiency. A synthetic data example demonstrates that f-x-y NRNA can be effective in suppressing random noise and improve trace-by-trace consistency.

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Variants of tumor necrosis factor-induced protein 3 gene are associated with left ventricular hypertrophy in hypertensive patients

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Chinese Medical Journal 2011年第10期124卷 1498-1503页

作者： XUE Hao wang Shu-xia wang Xiao-jian XIN ying wang Hu SONG Xiao-dong SUN Kai wang yi-bo HUI Ru-tai Department of Cardiology Chinese People's Liberation Army General Hospital Beijing 100853 China Sino-German Laboratory for Molecular Medicine Key Laboratory for Clinical Cardiovascular Genetics Ministry of Education Fuwai Cardiovascular Hospital and Cardiovascular Institute Chinese Academy of Medical Sciences & Peking Union Medical College Beijing 100037 China

Background Tumor necrosis factor-induced protein 3 （TNFAIP3） gene has been shown important in cardiac remodeling. The aim of the present study was to investigate whether the variants of TNFAIP3 gene are associated with left ventricular hypertrophy （LVH） in hypertensive *** Four representatives of all the other single nucleotide polymorphisms （SNPs） in TNFAIP3 gene were tested for association with hypertrophy in two independent hypertensive populations （n=2120 and n=324）.Results We found that only the tag SNP （rs5029939） was consistently lower in the hypertensives with cardiac hypertrophy than in those without cardiac hypertrophy in the two study populations, indicating a protective effect on LVH （odds ratio （OR）（95% confidence interval （CI））0.58 （0.358-0.863）, P=0.035; OR （95% CI）=0.477 （0.225-0.815）, P〈0.05,respectively）. Multiple regression analyses confirmed that the patients with G allele of rs5029939 had less thickness in inter-ventricular septum, left ventricular posterior wall, relative wall thickness and left ventricular mass index than did those with CC allele in the hypertensive patients in both study populations （all P〈0.01）.Conclusion These findings indicate that the SNP （rs5029939） in the TNFAIP3 gene may serve as a novel protective genetic marker for the development of LVH in patients with hypertension

关键词： tumor necrosis factor induced protein 3 polymorphism left ventricular hypertrophy hypertension

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