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Understanding the regulation of cereal grain filling:The way forward

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Journal of Integrative Plant Biology 2023年第2期65卷 526-547页

作者： bin ma Lin Zhang Zuhua He National Key Laboratory of Plant Molecular Genetics CAS Center for Excellence in Molecular Plant SciencesInstitute of Plant Physiology&EcologyChinese Academy of SciencesShanghai 200032China Joint International Research Laboratory of Agriculture and Agri-Product Safety of the Ministry of Education Yangzhou UniversityYangzhou 225009China Jiangsu Co-Innovation Center for Modern Production Technology of Grain Crops Yangzhou UniversityYangzhou 225009China

During grain filling,starch and other nutrients accumulate in the endosperm;this directly determines grain yield and grain quality in crops such as rice(Oryza sativa),maize(Zea mays),and wheat(Triticum aestivum).Grain filling is a complex trait affected by both intrinsic and environmental factors,making it difficult to explore the underlying genetics,molecular regulation,and the application of these genes for *** the development of powerful genetic and molecular techniques,much has been learned about the genes and molecular networks related to grain filling over the past *** this review,we highlight the key factors affecting grain filling,including both biological and abiotic *** then summarize the key genes controlling grain filling and their roles in this event,including regulators of sugar translocation and starch biosynthesis,phytohormone-related regulators,and other ***,we discuss how the current knowledge of valuable grain filling genes could be integrated with strategies for breeding cereal varieties with improved grain yield and quality.

关键词： cereals grain filling grain yield phytohormone regulation starch synthesis sugar translocation

Spatio-temporal variation in China's climatic seasons from 1951 to 2017

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Journal of Geographical Sciences 2020年第9期30卷 1387-1400页

作者： ma bin ZHANG Bo JIA Lige College of Geography and Environmental Science Northwest Normal UniversityLanzhou 730070.China Tourism College Innet Mongolia Normal UniversityHuhhot 010022China

In this paper,meteorological industry standard,daily mean temperature,and an improved multiple regression model are used to calculate China's climatic seasons,not only to help understand their spatio-temporal distribution,but also to provide a reference for China's climatic regionalization and crop *** is found that the improved multiple regression model can accurately show the spatial distribution of climatic *** main results are as *** are four climatic seasonal regions in China,namely,the perennial-winter,no-winter,no-summer and discernible regions,and their ranges basically remained stable from 1951 to *** cumulative anomaly curve of the four climatic seasonal regions clarifies that the trend of China's climatic seasonal regions turned in 1994,after which the area of the perennial-winter and no-summer regions narrowed and the no-winter and discernible regions *** number of sites with significantly reduced winter duration is the largest,followed by the number of sites with increased summer duration,and the number of sites with large changes in spring and autumn is the *** advances and autumn is postponed due to the shortened winter and lengthened summer *** with significant change in seasonal duration are mainly distributed in Northwest China,the Sichuan Basin,the Huanghe-Huaihe-Haihe(Huang-Huai-Hai) Plain,the Northeast China Plain,and the Southeast Coast.

关键词： climatic seasons revised multiple regression model spatio-temporal variation China

Daily SPEI Reveals Long-term Change in Drought Characteristics in Southwest China

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Chinese Geographical Science 2018年第4期28卷 680-693页

作者： JIA Yanqing ZHANG Bo ma bin College of Geography and Environmental Science Northwest Normal University Department of Geography Xinzhou Normal University

Drought is the most widespread and insidious natural hazard, presenting serious challenges to ecosystems and human society. The daily Standardized Precipitation Evapotranspiration Index(SPEI) has been developed to identify the regional spatiotemporal characteristics of drought conditions from 1960 to 2016, revealing the variability in drought characteristics across Southwest China. Daily data from142 meteorological stations across the region were used to calculate the daily SPEI at the annual and seasonal time scale. The mann-Kendall test and the trend statistics were then applied to quantify the significance of drought trends, with the following results. 1) The regionally averaged intensity and duration of all-drought and severe drought showed increasing trends, while the intensity and duration of extreme drought exhibited decreasing trends. 2) Mixed(increasing/decreasing) trends were detected, in terms of intensity and duration, in the three types of drought events. In general, no evidence of significant trends(P maller. 3) We identified the following drought hotspots: Guangxi Zhuang Autonomous Region from the 1960 s to the 1990 s, respectively. Guangxi Zhuang Autonomous Region and Guizhou Province in the 1970 s and 1980 s, and Yunnan Province in the 2000 s. Finally, this paper can benefit operational drought characterization with a day-to-day drought monitoring index, enabling a more risk-based drought management strategy in the conte

关键词： drought spatial-temporal characteristics variability daily Standardized Precipitation Evapotranspiration Index (SPEI) Southwest China

Safety evaluation and the static-dynamic coupling analysis of counter-arched slab in plunge pool

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Science China(Technological Sciences) 2009年第5期52卷 1397-1412页

作者： LIAN JiJian LIU XiZhu ma bin School of Civil Engineering Tianjin UniversityTianjin 300072China

The stability of plunge pool slab of drainage structure is crucial to energy dissipation,but the working conditions of counter-arched slab are very complex and its stress procedure is considerably nonlinear and ***,a nonlinear static and dynamic coupling method to analyze the counter-arched slab configuration is put forward,which can reflect the coupling of dynamic loads,slab,anchor bars,groundwork and abutment as well as the dynamic procedure of *** nonlinear factors and static-dynamic coupling are taken into consideration,and the working conditions,stress mechanism,dynamic instability procedure and influential instability factors are *** proposed method thus provides a comprehensive safety evaluation method of plunge pool,which further pro-vides an important theoretical basis for engineering design of counter-arched slab in plunge pool.

关键词： draw-off project plunge pool counter-arched slab stability static-dynamic coupling analysis safety evaluation

Force Analysis and Curve Design for Laying Pipe in Loop Laying Head of Wire Rod Mills

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Chinese Journal of Mechanical Engineering 2019年第2期32卷 36-52页

作者： Shuangji Yao marco Ceccarelli Giuseppe Carbone bin ma College of material Science and Engineering Yanshan University Qinhuangdao 066004 China University of Cassino and South Latium Cassino 03043 Italy HBIS Group Co. Ltd Handan 056001 China

Laying head is a high-precision engineering device in hot-rolled high speed wire rod production line. Previously research works are focused on the laying pipe wear-resisting. Laying pipe curve design method based on wire rod kinematics and dynamics analyses are not reported before. In order to design and manufacture the laying pipe, the motion and force process of the wire rod in the laying pipe should be studied. In this paper, a novel approach is proposed to investigate the force modeling for hot-rolled wire rod in laying pipe. An idea of limited element method is used to analysis and calculates the forces between laying pipe inner surface and wire rod. The design requirements of laying pipe curve for manufacturing are discussed. The kinematics and dynamics modeling for numerical calculation are built. A laying pipe curve equation is proposed by discussing design boundary conditions. Numerical results with di erent laying pipe curves design parameters are plotted and compared. The proposed approach performs good result which can be applied for laying pipe curve design and analysis for engineering application.

关键词： Wire rod mills Laying head Laying pipe curve design Wire rod force analysis

Concept of hydrophobic Li^(+)-solvated structure for high performances lithium metal batteries

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Rare Metals 2023年第5期42卷 1427-1430页

作者： bin ma Yu-Long Zhang Xin-Hua Liu School of Transportation Science and Engineering Beihang UniversityBeijing102206China College of Mechatronical and Electrical Engineering Hebei Agricultural UniversityBaoding071001China Dyson School of Design Engineering Imperial College LondonLondonSW72AZUK

The large-scale application of lithium metal batteries remains a challenge due to the hydrolysis of LiPF_(6),which can induce capacity fade and series of safety *** and his co-workers have designed a hydrophobic Li^(+)-solvated structure to obtain high performances lithium metal *** specific functional groups of theadditive,hexafluoroisopropyl acrylate.

关键词： lithium structure hydrolysis

SILICON NEEDLE ARRAY ON FLEXIBLE SUBSTRATE FOR FLUID TRANSFER

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Chinese Journal of Mechanical Engineering 2006年第3期19卷 387-390页

作者： ma bin GAN Zhiyin LIU Sheng Institute of Microsystems Huazhong University of Science and Technology Wuhan 430074 China Mechanical Engineering Department Wayne State University Detroit M148202 USA

Transdermal delivery is an attractive alternative, but it is limited by the extremely low permeability of skin. To solve this problem, a novel means--micro needle array based on micro electro-mechanical system （MEMS） technology, is provided to increase permeability of human skin with efficiency, safety and painless delivery. The fabrication method consists of a sequence of deep-reactive ion etching （DRIE）, anisotropic wet etching and conformal thin film deposition. The novel technology can enable the realization of micro fabricated micro needle array on a flexible silicon substrate. The micro needle array can be mounted on non-planar surface or even on flexible objects such as a human fingers and arms. The fabricated hollow wall straight micro needles are 200 μm in length, 30 μm inner diameter, and 50 μm outer diameter with 250 μm center-to-center spacing. Flow rate test proves that the polymeric base construction is important to function of micro needles array in package. Glucose solvent tests show that surface tension is the dominant force to affect the characters of flow in micro needles channel.

关键词： Micro needles array Drug delivery Flexibility Packaging Transdermal delivery

Spectral principal component analysis of the Hβ region of low-redshift SDSS quasars

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Research in Astronomy and Astrophysics 2019年第12期19卷 169-178页

作者： bin ma Zhaohui Shang Michael S.Brotherton National Astronomical Observatories Chinese Academy of Sciences.Beijing 100101China School of Astronomy and Space Science University of Chinese Academy of SciencesBeijing 100049China Tianjin Astrophysics Center Tianjin Normal UniversityTianjin 300387China Department of Physics and Astronomy University of WyomingLaramieWY 82071.USA

Studying the relationships among quasar spectral features is essential to unveil the origins of the emission lines and the quasars’ physical processes. Principal component analysis(PCA) is a powerful tool to investigate correlations between variables. Here, we present the results of PCA on the spectra of low-redshift SDSS quasars. The rest-frame wavelength range studied is 4000 – 5500 ?, involving some typical features of quasar spectra, such as Hβ, [O Ⅲ] and Fe Ⅱ emission lines. The first principal component is the anti-correlation between [O Ⅲ] and Fe Ⅱ, the well-known eigenvector one(EV1). The next six principal components also show clear(anti-)correlations between line strengths and/or velocity widths of various features, which agree well with measured spectral properties. By comparing the weights of these principal components with other quasar properties, we can identify their underlying drivers. We find that the second principal component represents spectral slope, and can quantify quasar host fraction, intrinsic slope and reddening well. The third component exhibits the velocity width variation of Hβ, and may be a proxy for orientation. In addition, we calculate the fractional-contribution spectra to investigate which components dominate the variance at individual wavelength ranges. Our results also indicate that the optical Fe Ⅱ emission may have distinct origins.

关键词： quasars:emission lines quasars:general

FPGA-Enhanced Data Processing System Using PCM Technology

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Chinese Journal of Electronics 2020年第4期29卷 766-771页

作者： LI Gezi CHEN Xiaogang LI Shunfen ma bin SONG Zhitang Shanghai Institute of Micro-system and Information Technology Chinese Academy of Sciences University of Chinese Academy of Sciences

Due to unique features, Storage class memory(SCM) technologies such as Phase change memory(PCM) open up new opportunities for architect *** such a scenario, we present a true PCM storage system with an FPGA storage controller to explore ISP *** contributions are summarized as follows.1) Propose a heterogeneous ISP architecture which uses FPGA working as storage controller and accelerator;2) Offer a new research direction for designing storage devices which inherently support ISP; 3) Present a novel storage system which eliminate data transfer; 4) The first evaluation of ISP on a real SCM device; 5) Demonstrate significant performance gains by using efficient data flow and consuming extremely small amounts of host ***, the proposed system can be extended to handle other kinds of data applications by adding corresponding accelerator and data conversion module in *** system can be realized for more aggressive results.

关键词： Storage system Phase change memory(PCM) Field programmable gate array(FPGA) Storage class memory(SCM) In-storage processing(ISP)