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Biochar-mediated Cd accumulation in rice grains through altering chemical forms,subcellular distribution,and physiological characteristics

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Biochar 2023年第1期5卷 830-843页

作者： Le Chen Lin Guo qiangqiang xiong Ping Liao Xueyun Deng Xiaohua Pan Xueming Tan Xiaobing Xie Qigen Dai Hui Gao Haiyan Wei Yongjun Zeng Hongcheng Zhang Jiangsu Key Laboratory of Crop Genetics and Physiology and Jiangsu Key Laboratory of Crop Cultivation and Physiology and Jiangsu Co-Innovation Center for Modern Production Technology of Grain Crops and Research Institute of Rice Industrial Engineering Technology Yangzhou UniversityYangzhou 225009China Ministry of Education Key Laboratory of Crop PhysiologyEcology and Genetic BreedingJiangxi Agricultural UniversityNanchang 330045China

Biochar can change the availability and morphology of soil ***,the influence of biochar on Cd chemical form and subcellular fraction in rice is poorly understood,particularly under different irrigation methods.A pot experiment of biochar application combined with two irrigation methods(continuous flooding and intermittent irrigation,CF and Ⅱ)was *** Cd accumulation,chemical form and subcellular fraction in rice organs and the associated physiological responses were *** significantly reduced soil available Cd(30.85-47.26%and 32.35-52.35%)under CF and Ⅱ but increased the Cd content(30.4-63.88%and 13.03-18.59%)in brown ***,the Cd content in shoots/grains under Ⅱ was higher than that under *** elevated the Cd soluble fraction in roots while lowered the cell wall fraction under both irrigation methods,whereas the opposite result was observed in *** increased water-,ethanol-,and NaCl-extractable Cd in roots meanwhile increased ethanol-extractable Cd in leaves under both irrigation ***,the total amount of water-,ethanol-,and NaCl-extractable Cd in rice roots was higher under Ⅱ than under *** hormones and antioxidant enzymes may also be involved in biochar-mediated Cd accumulation in rice ***,changes in Cd chemical form and subcellular fraction in the root and leaf are the main mechanisms of biochar-induced rice grains Cd accumulation.

关键词： Biochar Rice Cd accumulation Chemical forms Subcellular distribution Endogenous hormone Antioxidant enzyme

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A Dual Yamabe Flow and Related Integral Flows

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Chinese Annals of Mathematics,Series B 2024年第3期45卷 319-348页

作者： Jingang xiong School of Mathematical Sciences Laboratory of Mathematics and Complex SystemsMinistry of EducationBeijing Normal UniversityBeijing 100875China

The author studies a family of nonlinear integral flows that involve Riesz potentials on Riemannian manifolds. In the Hardy-Littlewood-Sobolev (HLS for short)subcritical regime, he presents a precise blow-up profile exhibited by the flows. In the HLS critical regime, by introducing a dual Q curvature he demonstrates the concentrationcompactness phenomenon. If, in addition, the integral kernel matches with the Green’s function of a conformally invariant elliptic operator, this critical flow can be considered as a dual Yamabe flow. Convergence is then established on the unit spheres, which is also valid on certain locally conformally flat manifolds.

关键词： Hardy-Littlewood-Sobolev functional Dual Q curvature Integral flow

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一种基于激光传感器的双目无人机室外场景视觉深度估计方法

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应用激光 2023年第5期43卷 94-98页

作者：熊强强赵旭南昌理工学院电子与信息学院江西南昌330013 海南科技职业大学机电工程学院海南海口571126

为进一步提高室外场景无人机深度测量值的精度,提出了基于激光传感器的双目无人机室外场景视觉深度估计方法。利用回波信号方程分解无人机的回波脉冲信号,解决激光传感器接收回波信号时出现的叠加回波问题。依据激光传感器中的激光成像... 详细信息

为进一步提高室外场景无人机深度测量值的精度,提出了基于激光传感器的双目无人机室外场景视觉深度估计方法。利用回波信号方程分解无人机的回波脉冲信号,解决激光传感器接收回波信号时出现的叠加回波问题。依据激光传感器中的激光成像原理,对无人机的回波信号进行小目标检测成像,解决了因邻近目标波形覆盖难以提取小目标的问题。利用反向卷积神经网络重构图像网络,重新设定Skip的作用域用来无缝拼接提取到的图像特征,以此实现双目无人机室外场景的视觉深度估计。试验结果表明,运用该方法估计室外场景深度时,检测到深度测量值与标准测量曲线相近,视差像素比例可以维持在50%以上,且深度估计的评价均优于对比方法。

关键词：激光传感器双目无人机室外场景视觉深度估计激光成像

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Convex-up Style of Deformation within Grabens in Regions of Incomplete Crossing Conjugate Normal Faults: A Numerical Simulation Investigation and Case Study

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Journal of Earth Science 2024年第3期35卷 839-849页

作者： Zheng Li Kai Wang xiong xiong Bing Zhou School of Geophysics and Geomatics China University of GeosciencesWuhan 430074China State Key Laboratory of Geodesy and Earth’s Dynamics Innovation Academy for Precision Measurement Science and TechnologyChinese Academy of SciencesWuhan 430077China Department of Earth Sicences Khalifa UniversityAbu DhabiUnited Arab Emirates

Crossing conjugate normal faults(CCNFs)are extensively developed in many hydrocarbon-producing basins,generally existing in the form of incomplete ***,the effect of the non-conjugate zone of the CCNFs on the conjugate relay zone post late tectonic action has not been previously *** use 3D elastic-plastic modeling to investigate the influence of incomplete(i.e.,partially intersecting)CCNFs on the pattern of deformation of strata in the intersection region.A series of model simulations were performed to examine the effects of horizontal tectonic extension,fault size,and fault depth on the deformation of conjugate relay zones of incomplete *** analyses yielded the following results.(1)The model of incomplete conjugation predicts a convex-up style of deformation in the conjugate graben region superimposed on overall subsidence under applied horizontal tectonic extension.(2)The degree of convex-up deformation of the conjugate graben depends on the influence of the non-conjugate zone on the conjugate relay zone,which varies with the amount of horizontal tectonic extension,fault size,and fault burial depth.(3)Our results indicate that incomplete CCNFs can form convex-up deformation,similar to that in the Nanpu Sag area and provide a sound understanding of hydrocarbon migration and accumulation.

关键词： incomplete conjugate normal fault conjugate graben convex-up deformation hydrocarbons Nanpu Sag tectonics.

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Light People:Professor Che Ting Chan,curiosity drives to create the impossibilities

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Light(Science & Applications) 2024年第7期13卷 1229-1233页

作者： Tingting Sun Ying xiong Light Publishing Group Changchun Institute of OpticsFine Mechanics and PhysicsChinese Academy of SciencesNo.3888 Dong Nanhu RoadChangchun 130033China College of Intelligence Science and Technology National University of Defense TechnologyNo.109 Deya RoadChangsha 410073China

Editorial“When something is said to be impossible,there are two points for researchers to initially clarify:whether it really is forbidden by the laws of nature;or whether it is simply that no material that currently exists in nature can do that.”Metamaterials are such magical beings,which have physical properties like invisibility,negative refraction,super-resolution,and perfect absorption that are absent from natural *** has been rated by Science as one of the top ten scientific and technological breakthroughs affecting human beings in the 21st *** this issue of Light People,we spoke with a“magic”creator,Professor Che Ting Chan,the Associate VicePresident(Research&Development)of the Hong Kong University of Science and Technology(HKUST),Member of the Hong Kong Academy of Sciences and Fellow of the American Physical *** has researched a number of theoretical problems in material physics,investigated the theory behind what they seek to achieve,and modulated light(electromagnetism)and acoustic waves through *** the following,let’s take a closer look at Professor Che Ting Chan’s research life,and appreciate his style and the background of his accomplishment.

关键词： breakthrough closer visibility

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光图像亚像素边缘高精度自适应检测研究

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激光杂志 2020年第11期41卷 86-90页

作者：陈黎艳熊强强南昌理工学院南昌330013

由于激光图像亚像素边缘易出现薄弱现象且边缘位置模糊,导致边缘检测速度以及精度下降,提出激光图像亚像素边缘高精度自适应检测研究。通过小波模极大原理对图像进行粗定位,获取亚像素边缘点位置,结合Zermike矩算法对边缘进行亚像素定位... 详细信息

由于激光图像亚像素边缘易出现薄弱现象且边缘位置模糊,导致边缘检测速度以及精度下降,提出激光图像亚像素边缘高精度自适应检测研究。通过小波模极大原理对图像进行粗定位,获取亚像素边缘点位置,结合Zermike矩算法对边缘进行亚像素定位,结合最大类熵阈值方法计算对应的阈值,通过人工对阈值进行反复调整,设定低阈值和自适应阈值来保护图像弱边缘和提取真正边缘,完成激光图像亚像素边缘自适应检测。相关实验结果表明,检测图像图像包含的边缘信息较多,且对于噪声的抑制效果较好,检测信噪比较高,检测时间在1s左右,检测效率在90%以上。

关键词：多阈值激光图像亚像素边缘位置自适应检测

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Recent Progress in Bionic Hydrogels for Articular Cartilage:Tribological and Mechanical Characteristics

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Journal of Bionic Engineering 2024年第2期21卷 653-673页

作者： Mohammad Javan Almasi Dangsheng xiong School of Materials Science and Engineering Nanjing University of Science and TechnologyNanjing210094China

Cartilage regeneration and repair are considered clinical challenges since cartilage has limited capability for *** tissue-engineered materials have the ability to repair cartilage,they have weak mechanical characteristics and cannot resist long-term *** the other hand,surgery to replace the joint is frequently done to treat significant cartilage deterioration these ***,the materials that are being used for replacement have high friction coefficients,lack shock absorption functions,and lack *** research on natural articular cartilage structure and function may lead to bionic hydrogels,which have suitable physicochemical and biological characteristics(e.g.,tribological and mechanical properties and the ability to support loadbearing capability),but need *** on their tribological and mechanical characteristics,the current review highlights the most recent advancements of bionic hydrogels used for articular cartilage,highlighting both the field's recent progress and its potential for future *** this reason,firstly,some important property improvement methods of bionic hydrogels are discussed and then,the recent findings of various research on the making of those bionic materials are provided and *** seems that by using some modifications such as product design,surface treatments,animal tests,controlling the isoelectric point of hydrogels,and computer simulation,the intended mechanical and tribological characteristics of natural articular cartilage may be attained by the bionic hydrogels.

关键词： Bionic hydrogel Articular cartilage Mechanical property Tribological property Lubrication

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A Generalized Blow up Criteria with One Component of Velocity for 3D Incompressible MHD System

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Chinese Annals of Mathematics,Series B 2024年第2期45卷 253-264页

作者： Bin HAN Xi xiong Department of Mathematics Hangzhou Dianzi UniversityHangzhou 310018China

In this paper,the authors study the global regularity of the 3D magnetohydrodynamics system in terms of one velocity *** particular,they establish a new Prodi-Serrin type regularity criterion in the framework of weak ... 详细信息

关键词： MHD Regularity Blow-up criterion

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Hole mobility enhancement in monolayer WSe2 p-type transistors through molecular doping

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Science China(Information Sciences) 2024年第6期67卷 207-213页

作者： Shiyuan LIU xiong xiong Xin WANG Xinhang SHI Ru HUANG Yanqing WU School of Integrated Circuits and Beijing Advanced Innovation Center for Integrated Circuits Peking University Wuhan National High Magnetic Field Center and School of Integrated Circuits Huazhong University of Science and Technology

Two-dimensional （2D） transition metal dichalcogenide （TMDC） semiconductor materials exhibit extraordinary electrical properties,holding promise for the realization of next-generation complementary metal-oxide-semiconductor （CMOS） devices at ultimate ***,constrained by effective device doping strategies,the hole mobility and device performance of tungsten diselenide （WSe2） p-type transistors,especially monolayer chemical vapor deposition （CVD）-grown WSe2,have not met *** this paper,an effective performance enhancement of monolayer WSe2p-type transistor was achieved through a molecular doping *** monolayer WSe2directly on SiO2back-gated substrates and leveraging energy band alignment design,4-nitrobenzenediazonium tetrafluoroborate （4-NBD） molecular dopant with a concentration of 10 m M was utilized to modulate the Fermi level position of monolayer WSe2for hole *** devices demonstrated a more than 98%increase in hole mobility,reaching up to 97 cm2·V-1·s-1while maintaining the current on/off ratio of *** p-type WSe2transistors with 1μm channel length exhibit a high drive current surpassing 176μA·μm-1,exceeding previous CVD-WSe2devices with similar channel *** straightforward and effective approach to improving the electrical performance of WSe2transistors paves the way for advanced logic technologies based on transition metal dichalcogenide semiconductors.

关键词： CVD-grown WSe$_2$ molecular doping 4-NBD p-type transistors hole mobility

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A new gravitational theory and dark matter problem

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Communications in Theoretical Physics 2024年第6期76卷 129-136页

作者： xiong Zhao Yongge Ma Department of Physics Beijing Normal UniversityBeijing 100875China

We propose a new gravitational theory with torsion based on Riemann-Cartan geometry,in which all physical quantities are *** addition to the spacetime metric,the gravitational degrees of freedom in this theory also include the torsion and two scalar *** energy-momentum tensor of the matter fields in this theory is also proposed.A spherically symmetric static vacuum solution of the theory is *** turns out that this solution can fit the observational data of the rotation curve outside the stellar disk in the Milky ***,the galactic dark matter may just be the gravitational effect of the theory with torsion.

关键词： gravity torsion dark matter

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