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Roles of FERONIA-like receptor genes in regulating grain size and quality in rice

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Science China(Life Sciences) 2021年第2期64卷 294-310页

作者： Long Wang Dandan Wang zhuhong Yang Shun Jiang Jianing Qu Wei he Zhenming Liu Junjie Xing Youchu Ma Qinlu Lin Feng Yu State Key Laboratory of Chemo/Biosensing and Chemometrics and Hunan Province Key Laboratory of Plant Functional Genomics and Developmental RegulationCollege of BiologyHunan UniversityChangsha 410082China National Engineering Laboratory for Rice and By-product Deep Processing Central South University of Forestry and TechnologyChangsha 410004China State Key Laboratory of Hybrid Rice Hunan Hybrid Rice Research CenterChangsha 410125China

Grain yield and quality are critical factors that determine the value of grain *** this study,we analyzed the functions of 12 FERONIA-like receptor(FLR)family members in rice and investigated their effects on grain size and *** found that FLR1,FLR2 and FLR8 negatively regulated grain size,and FLR15 positively regulated grain ***1 mutants had a higher cell number and an accelerated rate of grain filling compared to wild-type plants,which led to grains with greater widths.A mechanism underlying the regulation of grain size by FLR1 is that FLR1 is associated with OsRac1 Rho-like GTPase,a positive regulator of grain *** grain quality,the flr1 mutant had a higher percentage of chalkiness compared with wild-type plants,and seeds carrying mutations in flr3 and flr14 had endosperms with white floury *** elucidate the possible mechanism underlying this phenomenon,we found that FLR1 was constitutively expressed during endosperm ***-seq analysis identified 2,367 genes that were differentially expressed in the flr1 mutant,including genes involved in starch and sucrose metabolism and carbon *** this study,we identified the roles played by several FLR genes in regulating grain size and quality in rice and provided insights into the molecular mechanism governing the FLR1-mediated regulation of grain size.

关键词： FLR chalkiness seed size grain quality OsRac1

Parallel algorithm and its convergence of spatial domain decomposition of discrete ordinates method for solving radiation heat transfer problem

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Chinese Journal of Aeronautics 2015年第1期28卷 77-85页

作者： Wang Zhenhua he Zhihong Mu Lei dong Shikui School of Energy Science and Engineering Harbin Institute of Technology

To improve the computational efficiency and hold calculation accuracy at the same time,we study the parallel computation for radiation heat transfer. In this paper, the discrete ordinates method（DOM） and the spatial domain decomposition parallelization（DDP） are combined by message passing interface（MPI） language. The DDP–DOM computation of the radiation heat transfer within the rectangular furnace is described. When the result of DDP–DOM along one-dimensional direction is compared with that along multi-dimensional directions, it is found that the result of the latter one has higher precision without considering the medium scattering. Meanwhile, an in-depth study of the convergence of DDP–DOM for radiation heat transfer is made. Analyzing the cause of the weak convergence, we relate the total number of iteration steps when the convergence is obtained to the number of sub-domains. When we decompose the spatial domain along one-,two- and three-dimensional directions, different linear relationships between the number of total iteration steps and the number of sub-domains will be possessed separately, then several equations are developed to show the relationships. Using the equations, some phenomena in DDP–DOM can be made clear easily. At the same time, the correctness of the equations is verified.

关键词： iteration decompose steps processors directions verified latter partition rectangular split

The development process of a temperate montane peatland and its controlling factors since the middle Holocene

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Science China Earth Sciences 2023年第3期66卷 594-608页

作者： Yanmin dong Hongkai LI Shengzhong WANG Hongshi he Key Laboratory of Geographical Process and Ecological Security in Changbai Mountains Ministry of EducationSchool of Geographical SciencesNortheast Normal UniversityChangchun 130024China State Environmental Protection Key Laboratory of Wetland Ecology and Vegetation Restoration Northeast Normal UniversityChangchun 130024China School of Natural Resources University of MissouriMO 65211USA

Peatlands are some of the largest carbon reservoirs in terrestrial ecosystems and play a key role in the global carbon *** peatland development,carbon accumulation processes,and the peatland response to varying forcing factors over different temporal and spatial scales helps reveal the underlying processes and general patterns of these *** assess the role of climate and local conditions in peatland development,the basal samples from 23 peat cores and three well dated long peat cores were used to explore peatland initiation,lateral expansion,and carbon accumulation rate in the Baijianghe peatland located in the Changbai Mountains,Northeast *** results reveal that the Baijianghe peatland was initiated from forest conditions at 7.9 *** BP and then expanded laterally by *** rapid expansion between 5 and4 *** BP likely resulted from high precipitation and gentle *** mean carbon accumulation rates of the three long peat cores were 36.3,39.1 and 48.4 g C m^(-2)yr^(-1),respectively,which are higher than rates from the northern *** climate and local conditions have exerted an important influence on carbon accumulation rates in the Baijianghe peatland since the middle *** carbon accumulation patterns between 5 and 1.5 *** BP were probably linked to local conditions rather than climatic settings,including topography,hydrological conditions,and plant *** consistently decreasing carbon accumulation rate values at all locations within the BJH peatland over the last 1.5 *** BP suggests that climate is the primary *** study highlights the varying primary controls on the process of peatland development and reveals the important role of local conditions in carbon accumulation.

关键词： Paludification Peatland lateral expansion Carbon accumulation rate Northeast China Middle Holocene

Numerical investigation on the flow and thermal behaviors of the volumetric solar receivers with different morphologies

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Science China(Technological Sciences) 2024年第9期67卷 2749-2757页

作者： DU Shen LI dong LI MengJie he YaLing National Innovation Platform(Center)for Industry-Education Integration of Energy Storage Technology Key Laboratory of Thermo-Fluid Science and Engineering of Ministry of EducationXi’an Jiaotong UniversityXi’an 710049China

Morphologies of the porous materials influence the processes of solar radiation transport, flow, and thermal behaviors within volumetric solar receivers. A comprehensive comparative study is conducted by applying pore scale numerical simulations on volumetric solar receivers featuring various morphologies, including Kelvin, Weaire-Phelan, and foam configurations. The idealized unit cell and X-ray computed tomography scan approaches are employed to reconstruct pore scale porous *** Carlo ray tracing and pore scale numerical simulations are implemented to elucidate the radiative, flow, and thermal behaviors of distinct receivers exposed to varying thermal boundary conditions and real irradiation situations. The findings demonstrate that the foam structure exhibits greater solar radiation absorptivity, while Kelvin and Weaire-Phelan structures enhance the penetration depth under non-perpendicular solar irradiation. In comparison with Kelvin and Weaire-Phelan configurations, the foam structure presents efficient convective heat transfer, with the Weaire-Phelan structure showing pronounced thermal non-equilibrium phenomena. The variance in convective heat transfer coefficient between Kelvin and Weaire-Phelan configurations is approximately 8.4%. The foam structure exhibits higher thermal efficiency and flow resistance under nonperpendicular irradiation compared to Kelvin and Weaire-Phelan structures, attributed to its smaller pore size and intricate flow channels. An increase of 1.3% in thermal efficiency is observed with a substantial rise in pressure drop of 32.2%.

关键词： volumetric solar receiver porous morphology pore scale method solar radiation absorption thermal performance flow resistance

Redshift drift constraints on holographic dark energy

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Science China(Physics,Mechanics & Astronomy) 2017年第3期60卷 80-86页

作者： dong-Ze he Jing-Fei Zhang Xin Zhang Department of Physics College of Sciences Northeastern University Center for High Energy Physics Peking University

The Sandage-Loeb （SL） test is a promising method for probing dark energy because it measures the redshift drift in the spectra of Lyman-o： forest of distant quasars, covering the ＂redshift desert＂ of 2 ≤ z ≤ 5, which is not covered by existing cosmological observations. Therefore, it could provide an important supplement to current cosmological observations. In this paper, we explore the impact of SL test on the precision of cosmological constraints for two typical holographic dark energy models, i.e., the original holographic dark energy （HDE） model and the Ricci holographic dark energy （RDE） model. To avoid data inconsistency, we use the best-fit models based on current combined observational data as the fiducial models to simulate 30 mock SL test data. The results show that SL test can effectively break the existing strong degeneracy between the present-day matter density Ωm0 and the Hubble constant 1-1o in other cosmological observations. For the considered two typical dark energy models, not only can a 30-year observation of SL test improve the constraint precision of Ωm0 and h dramatically, but can also enhance the constraint precision of the model parameters c and α significantly.

关键词： redshift drift Sandage-Loeb test holographic dark energy Ricci dark energy cosmological constraints

Capability requirements modeling and verification based on fuzzy ontology

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Journal of Systems Engineering and Electronics 2012年第1期23卷 78-87页

作者： Qingchao dong Zhixue Wang Weixing Zhu Hongyue he Institute of Command Automation PLA University of Science and Technology Nanjing 210007 R R. China

The capability requirements of the command, control, communication, computing, intelligence, surveillance, reconnaissance （C41SR） systems are full of uncertain and vague information, which makes it difficult to model the C41SR architecture. The paper presents an approach to modeling the capability requirements with the fuzzy unified modeling language （UML） and building domain ontologies with fuzzy description logic （DL）. The UML modeling constructs are extended according to the meta model of Depart- ment of Defense Architecture Framework to improve their domain applicability, the fuzzy modeling mechanism is introduced to model the fuzzy efficiency features of capabilities, and the capability requirement models are converted into ontologies formalized in fuzzy DL so that the model consistency and reasonability can be checked with a DL reasoning system. Finally, a case study of C41SR capability requirements model checking is provided to demonstrate the availability and applicability of the method.

关键词： fuzzy ontology fuzzy unified modeling language (UML) fuzzy description logic (DL) model checking.

Cell-based drug delivery systems for biomedical applications

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Nano Research 2018年第10期11卷 5240-5257页

作者： Teng Li he dong Can Zhang Ran Mo State Key Laboratory of Natural Medicines Jiangsu Key Laboratory of Drug Discovery for Metabolic Diseases Center of AdvancedPharmaceuticals and 8iomaterials China Pharmaceutical University Nanjing 210009 China

Spurred by numerous achievements in nanoscience and nanotechnology, the evolution of nanoparticulate drug delivery systems （nano-DDSs） is in its rapid growth period and attracting considerable attention due to their unique advantages in biomedical applications. Natural particulates ranging from mammalian cells to bacteria possess their own distinctive delivery processes and mechanisms, which inspires more design and development of cell-based DDSs by integrating the innate functions of cells with the nanoscale characteristics of nanoparticles. In this review article, we focus on the recent advances in cell-based DDSs for site-specific delivery of therapeutics and enhanced treatment of diseases. The promise and perils of cell-based DDSs are also discussed.

关键词： natural particulates nanotechnology bioinspired drug delivery biomedical application

From Eliza to XiaoIce：challenges and opportunities with social chatbots

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Frontiers of Information Technology & Electronic Engineering 2018年第1期19卷 10-26页

作者： heung-yeung SHUM Xiao-dong he Di LI Microsoft Corporation Redmond WA 98052 USA

Conversational systems have come a long way since their inception in the 1960 *** decades of research and development,we have seen progress from Eliza and Parry in the 1960 s and 1970 s,to task-completion systems as in the Defense Advanced Research Projects Agency(DARPA) communicator program in the 2000 s,to intelligent personal assistants such as Siri,in the 2010 s,to today's social chatbots like Xiao *** chatbots' appeal lies not only in their ability to respond to users' diverse requests,but also in being able to establish an emotional connection with *** latter is done by satisfying users' need for communication,affection,as well as social *** further the advancement and adoption of social chatbots,their design must focus on user engagement and take both intellectual quotient(IQ) and emotional quotient(EQ) into *** should want to engage with a social chatbot;as such,we define the success metric for social chatbots as conversation-turns per session(CPS).Using Xiao Ice as an illustrative example,we discuss key technologies in building social chatbots from core chat to visual awareness to *** also show how Xiao Ice can dynamically recognize emotion and engage the user throughout long conversations with appropriate interpersonal *** we become the first generation of humans ever living with artificial intelligenc(AI),we have a responsibility to design social chatbots to be both useful and empathetic,so they will become ubiquitous and help society as a whole.

关键词： Conversational system Social Chatbot Intelligent personal assistant Artificial intelligence Xiao Ice

Passive activity enhances residual control ability in patients with complete spinal cord injury

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Neural Regeneration Research 2025年第8期20卷 2337-2347页

作者： Yanqing Xiao Mingming Gao Zejia he Jia Zheng Hongming Bai Jia-Sheng Rao Guiyun Song Wei Song Xiaoguang Li Beijing Key Laboratory for Biomaterials and Neural Regeneration Beijing Advanced Innovation Center for Biomedical EngineeringSchool of Biological Science and Medical EngineeringBeihang UniversityBeijingChina Department of Rehabilitation Evaluation China Rehabilitation Research CenterBeijingChina Cardiac Center Beijing Children’s HospitalCapital Medical UniversityBeijingChina The State Key Laboratory of Virtual Reality Technology and Systems Beihang UniversityBeijingChina Department of Rehabilitation Engineering China Rehabilitation Science InstituteBeijingChina

Patients with complete spinal cord injury retain the potential for volitional muscle activity in muscles located below the spinal injury ***,because of prolonged inactivity,initial attempts to activate these muscles may not effectively engage any of the remaining neurons in the descending pathway.A previous study unexpectedly found that a brief clinical round of passive activity significantly increased volitional muscle activation,as measured by surface *** this study,we further explored the effect of passive activity on surface electromyographic signals during volitional control tasks among individuals with complete spinal cord *** patients with chronic complete thoracic spinal cord injury were *** electromyography data from eight major leg muscles were acquired and compared before and after the passive activity *** results indicated that the passive activity led to an increased number of activated volitional muscles and an increased frequency of *** the cumulative root mean square of surface electromyography amplitude for volitional control of movement showed a slight increase after passive activity,the difference was not statistically *** findings suggest that brief passive activity may enhance the ability to initiate volitional muscle activity during surface electromyography tasks and underscore the potential of passive activity for improving residual motor control among patients with motor complete spinal cord injury.

关键词： complete spinal cord injury cycle training epidural electrical stimulation motor training passive activity physiological state spinal cord circuit surface electromyography volitional control task