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Interaction effect of nitrogen form and planting density on plant growth and nutrient uptake in maize seedlings

Journal of Integrative Agriculture 2019年第5期18卷 1120-1129页

作者： WANG Peng WANG Zhang-kui SUN Xi-chao MU Xiao-huan CHEN Huan CHEN Fan-jun Yuan Li-xing mi Guo-hua Department of Plant Nutrition College of Resources and Environmental SciencesChina Agricultural University

High planting density is essential to increasing maize grain ***,single plants suffer from insufficient light under high planting ***(NH_4^+)assimilation consumes less energy converted from radiation than nitrateIt is hypothesized that a mixed NO_3~–/NH_4^+supply is more important to improving plant growth and population productivity under high *** planting *** plants were grown under hydroponic conditions at two planting densities(low density:only).A significant interaction effect was found between planting density and N form on plant *** to nitrate only,75/25NO_3~–/NH_4^+increased per-plant biomass by 44%under low density,but by 81%under high *** with 75/25NO_3~–/NH_4^+increased plant ATP,photosynthetic rate,and carbon amount per plant by 31,7,and 44%under low density,respectively,but by 51,23,and 95%under high ***,carbon level per plant under 75/25NO_3~–/NH_4^+was improved,which increased leaf area,specific leaf weight and total root length,especially for high planting density,increased by 57,17 and 63%,***,under low density,75/25NO_3~–/NH_4^+increased nitrogen uptake rate,while under high density,75/25NO_3~–/NH_4^+increased nitrogen,phosphorus,copper and iron uptake *** increasing energy use efficiency,an optimum NO_3~–/NH_4^+ratio can improve plant growth and nutrient uptake efficiency,especially under high planting *** summary,an appropriate supply of NH_4^+in addition to nitrate can greatly improve plant growth and promote population productivity of maize under high planting density,and therefore a mixed N form is recommended for high-yielding maize management in the field.

关键词： maize planting density NO3^-/NH4^+ ratio carbon nutrient uptake root morphology

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Interfacial solar evaporator for brine treatment: the importance of resilience to high salinity

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National Science Review 2021年第10期8卷 8-9页

作者： Baoxia mi Department of Civil and Environmental Engineering University of California

As reverse osmosis(RO) technologies have improved, desalination has become a viable approach to addressing water scarcity, by treating various alternative water resources such as seawater, brackish water and wastewater [1]. However,the management of brines has emerged as one of the key issues preventing desalination from being further adopted, especially in locations where use of ocean outfalls or deep well injection is *** advance desalination in these places,

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Generalized Einstein-Podolsky-Rosen steering paradox

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Chinese Physics B 2024年第11期33卷 212-217页

作者： Zhi-Jie Liu Xing-Yan Fan Jie Zhou mi Xie jing-Ling Chen Theoretical Physics Division Chern Institute of Mathematics and LPMCNankai UniversityTianjin 300071China College of Physics and Materials Science Tianjin Normal UniversityTianjin 300382China Department of Physics School of ScienceTianjin UniversityTianjin 300072China

Quantum paradoxes are essential means to reveal the incompatibility between quantum and classical theories,among which the Einstein–Podolsky–Rosen(EPR)steering paradox offers a sharper criterion for the contradiction between localhidden-state model and quantum mechanics than the usual inequality-based *** this work,we present a generalized EPR steering paradox,which predicts a contradictory equality“2Q=(1+δ)C”(0≤δ<1)given by the quantum(Q)and classical(C)*** any N-qubit state in which the conditional state of the steered party is pure,we test the paradox through a two-setting steering protocol,and find that the state is steerable if some specific measurement requirements are ***,our construction also enlightens the building of EPR steering inequality,which may contribute to some schemes for typical quantum teleportation and quantum key distributions.

关键词： EPR steering steering paradox quantum entangled states

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语言躺平与情感回归的青年一代——从躺平的话语流变谈起

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深圳社会科学 2025年第1期8卷 107-115页

作者：宓淑贤上海师范大学哲学与法政学院社会学系上海200234

“躺平”成为新时期青年形象的一种重要表达,也是青年一代缓解自身焦虑的方式。躺平可以分为行动式和语言式两种类型。研究发现,当代青年处在语言式躺平-行动式躺平的连续统之中,且呈现出语言式躺平更为普遍的趋势。青年一代并未真的放... 详细信息

“躺平”成为新时期青年形象的一种重要表达,也是青年一代缓解自身焦虑的方式。躺平可以分为行动式和语言式两种类型。研究发现,当代青年处在语言式躺平-行动式躺平的连续统之中,且呈现出语言式躺平更为普遍的趋势。青年一代并未真的放弃对美好生活的追求。获得感成为躺平话语中的核心理念,低获得感让青年感到不安,通过逃离消费式生活样态来暂时性地选择躺平。躺平青年以躺平的状态为自己的行动立论,从拒绝内卷到拒绝任何意义上的竞争。躺平是上无老赡养下无儿抚育的青年群体的一种短时间内的选择,同时,他们逐渐回归于情感式责任,重拾家庭情感价值,获得生产者之外的生活意义。躺平青年以“家”为后盾,成为去义务化的一代,展演着内心的跌宕与冲突。躺平实际上是一种无奈之举,他们仍然是为自己和他人负责任的一代。家成为部分躺平青年的背后支撑,也是代际共享责任理念的空间承载,两代人都认为成家是责任的体现,父辈需要子辈成家以传递责任,子辈自认为无法为他人负责任而暂时性躺平。同时,父辈对子辈的态度在家庭和社会两个领域是不同的,前者是一种资源的传递,后者则成为一种竞争关系。躺平青年成为当代青年的一个镜像,呈现出社会变迁洪流中青年人的心态变化。

关键词：语言躺平情感回归青年话语流变代际支持

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Simulation on the dynamic stability derivatives of battle-structure-damaged aircrafts

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Defence Technology（防务技术） 2021年第3期17卷 987-1001页

作者： Bai-gang mi School of Aeronautics Northwestern Polytechnical UniversityXi’an 710072China

Accurately evaluating the aerodynamic performance of a battle-structure-damaged aircraft is essential to enable the pilot to optimize the flight control strategy. Based on CFD and rigid dynamic mesh techniques,a numerical method is developed to calculate the longitudinal and longitudinal-lateral coupling forces and moments with small amplitude sinusoidal pitch oscillation, and the corresponding dynamic derivatives of two fragment-structure-damaged and two continuous-rod-damaged models modified from the SACCON UAV. The results indicate that, at the reference point set in this paper, additional positive damping is generated in fragment-damaged configurations;thus, the absolute values of the negative pitch dynamic derivative increase. The missing wingtip induces negative pitch damping on the aircraft and decreases the value of the pitch dynamic derivative. The missing middle wing causes a noticeable increase in the absolute value of the pitch dynamic derivative;the missing parts on the right wing cause the aircraft to roll to the right side in the dynamic process, and the pitch-roll coupling cross dynamic derivatives are positive. Moreover, the values of these derivatives increase as the damaged area on the right wing increases, and an optimal case with the smallest cross dynamic derivative can be found to help improve the survivability of damaged aircraft.

关键词： Flying wing Fragment damage Continuous rod damage Combined dynamic derivative Computational fluid dynamics(CFD)

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Origin of the presence/absence variation of the LTIA1/LTIA2 mini-ribonucleaseⅢgenes required for low-temperature growth in rice

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The Crop Journal 2024年第5期12卷 1459-1470页

作者： jing Yang Yu Peng Limin mi Aiqing Sun Ping Li Yan Wang Yi Zhang Sheng Teng Key Laboratory of microbiological Metrology Measurement&Bio-product Quality SecurityState Administration for Market RegulationCollege of Life SciencesChina Jiliang UniversityHangzhou 310018ZhejiangChina Chinese Academy of Sciences Center for Excellence in Molecular Plant Sciences Institute of Plant Physiology and EcologyChinese Academy of SciencesShanghai 200032China School of Life Sciences Fudan UniversityShanghai 200433China College of Life Sciences Shanghai UniversityShanghaiChina School of Agriculture Yunnan UniversityKunming 650504YunnanChina University of Chinese Academy of Sciences Beijing 100049China

A rice low temperature-induced albino variant was determined by the recessive ltia1 and ltia2 ***1 and LTIA2 encode highly conserved mini-ribonucleasesⅢlocated in chloroplasts and expressed in aerial parts of the *** low temperature,LTIA1 and LTIA2 redundantly affect chlorophyll levels,non-photochemical quenching,photosynthetic quantum yield of PSⅡand seedling ***1 and LTIA2 proteins are involved in splicing of atp F and the biogenesis of 16S and 23S rRNA in ***/absence variation of LTIA1,the ancestral copy,was found only in japonica but that of LTIA2 in all rice *** with LTIA2 presence tended to be distributed more remote from the equator compared to those with LTIA2 ***2 duplicated from LTIA1 at the early stage of divergence of the AA genome Oryza species but deleted againin *** cultivated rice,absence of LTIA2 is derived from ***1 absence occurred more recently in japonica.

关键词： Rice Low temperature induced albino mini-RNaseⅢ Presence/Absence variations Evolution

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Hierarchical Capillary Coating to Biofunctionlize Drug-Eluting Stent for Improving Endothelium Regeneration

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Research 2020年第1期2020卷 81-94页

作者： jing Wang Yunfan Xue Jun Liu mi Hu He Zhang Kefeng Ren Yunbing Wang Jian Ji MOE Key Laboratory of Macromolecule Synthesis and Functionalization Department of Polymer Science and EngineeringZhejiang UniversityHangzhou 310027China National Engineering Research Center for Biomaterials Sichuan UniversityChengdu 610064China

The drug-eluting stent(DES)has become one of the most successful and important medical devices for coronary heart disease,but yet suffers from insufficient endothelial cell(EC)growth and intima repair,eventually leading to treatment *** biomacromolecules such as vascular endothelial growth factor(VEGF)would be promising to promote the intima regeneration,combining hydrophilic and vulnerable biomacromolecules with hydrophobic drugs as well as preserving the bioactivity after harsh treatments pose a huge ***,we report on a design of hierarchical capillary coating,which composes a base solid region and a top microporous region for incorporating rapamycin and VEGF,*** top spongy region can guarantee the efficient,safe,and controllable loading of VEGF up to 1μg/cm^(2) in 1 minute,providing a distinctive real-time loading capacity for saving the *** on this,we demonstrate that our rapamycin-VEGF hierarchical coating impressively promoted the competitive growth of endothelial cells over smooth muscle cells(ratio of EC/SMC~25)while relieving the adverse impact of rapamycin to *** further conducted the real-time loading of VEGF on stents and demonstrate that the hierarchical combination of rapamycin and VEGF showed remarkable endothelium regeneration while maintaining a very low level of in-stent *** work paves an avenue for the combination of both hydrophobic and hydrophilic functional molecules,which should benefit the next generation of DES and may extend applications to diversified combination medical devices.

关键词： Regeneration eventually guarantee

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Modeling of Cell/Dendrite Transition During Directional Solidification of Ti-Al Alloy Using Cellular Automaton Method

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Journal of Iron and Steel Research International 2008年第3期15卷 82-86页

作者： WANG Kuang-fei LI Bang-sheng mi Guo-fa GUO jing-jie FU Heng-zhi School of Materials Science and Engineering Henan Polytechnic University Jiaozuo 454100 Henan China School of Materials Science and Engineering Harbin Institute of Technology Harbin 150001 Heilongjiang China

Solute diffusion controlled solidification model was used to simulate the initial stage cellular to dendrite transition of Ti44Al alloys during directional solidification at different velocities. The simulation results show that during this process, a mixed structure composed of cells and dendrites was observed, where secondary dendrites are absent at facing surface with parallel closely spaced dendrites, which agrees with the previous experimental observation. The dendrite spacings are larger than cellular spacings at a given rate, and the columnar grain spacing sharply increases to a maximum as solidification advance to coexistence zone. In addition, simulation also revealed that decreasing the numbers of the seed causes the trend of unstable dendrite transition to increase. Finally, the main influence factors affecting cell/dendrite transition were analyzed, which could be the change of growth rates resulting in slight fluctuations of liquid composition occurred at growth front. The simulation results are in reasonable agreement with the results of previous theoretical models and experimental observation at low cooling rates.

关键词： Ti44Al alloy cell/dendrite transition directional solidification solute diffusion controlled model cell/ dendrite spacing

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Active Learning Approach to Optimization of Experimental Control

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Chinese Physics Letters 2020年第10期37卷 21-25页

作者： Yadong Wu Zengming Meng Kai Wen Chengdong mi jing Zhang Hui Zhai Institute for Advanced Study Tsinghua UniversityBeijing 100084China State Key Laboratory of Quantum Optics and Quantum Optics Devices and Institute of Opto-ElectronicsCollaborative Innovation Center of Extreme OpticsShanxi UniversityTaiyuan 030006China

We present a general machine learning based scheme to optimize experimental *** method utilizes the neural network to learn the relation between the control parameters and the control goal,with which the optimal control parameters can be *** main challenge of this approach is that the labeled data obtained from experiments are not *** central idea of our scheme is to use the active learning to overcome this *** a demonstration example,we apply our method to control evaporative cooling experiments in cold *** have first tested our method with simulated data and then applied our method to real *** is demonstrated that our method can successfully reach the best performance within hundreds of experimental *** method does not require knowledge of the experimental system as a prior and is universal for experimental control in different systems.

关键词： utilize scheme hundreds

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Synthesis and superconductivity in yttrium superhydrides under high pressure

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Chinese Physics B 2022年第1期31卷 107-112页

作者： Yingying Wang kui Wang Yao Sun Liang Ma Yanchao Wang Bo Zou Guangtao Liu mi Zhou Hongbo Wang State Key Laboratory of Superhard Materials College of PhysicsJilin UniversityChangchun 130012China International Center of Computational Method&Software College of PhysicsJilin UniversityChangchun 130012China International Center of Future Science Jilin UniversityChangchun 130012China

Flourishing rare earth superhydrides are a class of recently discovered materials that exhibit near-room-temperature superconductivity at high pressures,ushering in a new era of superconductivity research at high *** superhydrides drew the most attention among these superhydrides due to their abundance of stoichiometries and excellent ***,we carried out a comprehensive study of yttrium superhydrides in a wide pressure range of 140 GPa-300 *** successfully synthesized a series of superhydrides with the compositions of YH_(4),YH_(6),YH_(7),and YH_(9),and reported superconducting transition temperatures of 82 K at 167 GPa,218 K at 165 GPa,29 K at 162 GPa,and230 K at 300 GPa,respectively,as evidenced by sharp drops in *** structure and superconductivity of YH_(4) were taken as a representative example and were also examined using x-ray diffraction measurements and the superconductivity suppression under external magnetic fields,*** YH_(10),a candidate for room-temperature superconductor,was not synthesized within the study pressure and temperature ranges of up to 300 GPa and 2000 *** current study established a detailed foundation for future research into room-temperature superconductors in polynary yttrium-based superhydrides.

关键词： high pressure superhydride superconductivity

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