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Simulated impacts of atmospheric gravity waves on the initiation and optical emissions of sprite halos in the mesosphere

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Science China Earth Sciences 2019年第4期62卷 631-642页

作者： jinbo zhang Qilin zhang Xiufeng GUO Wenhao HOU Haiyang GAO Key Laboratory of Meteorological Disaster Ministry of Education (KLME) Joint International Research Laboratory of Climate and Environment Change (ILCEC) Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disaster (CIC-FEMD)Key L aboratory for Aerosol-C loud-Precipitation of China Meteorological Administration Nanjing University of Information Science & Technology Nanjing 210044 China

The correlation between atmospheric gravity waves(GWs) and Transient Luminous Events(TLEs) has been poorly studied using both synchronous observations and numerical simulations. To investigate the modulation effects of GWs on TLEs,a troposphere-mesosphere quasi-electrostatic field model is developed in three-dimensional Cartesian coordinates, and the effects of GW perturbations on the initiation and optical emissions of sprite halos are simulated using the model. Simulation results indicate that the atmospheric density at lower ionosphere altitudes becomes inhomogeneous due to GW perturbations, and sprite halos tend to initiate in the GW troughs due to the lower electric breakdown threshold. GW perturbations cause the deformation of sprite halos, strong luminous regions distribute mainly along the GW troughs while optical intensities along the GW peaks is relatively weak. Larger GW perturbations lead to more pronounced deformation of sprite halos, however, stronger lightning discharges in the troposphere result in less optical perturbations of sprite halos. The observed luminous intensities and optical morphology of sprite halos are also affected by the observing orientations and the lightning polarities.

关键词： Three-dimensional quasi-electrostatic field model Sprite halos Optical emission Gravity waves

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Effect of liming on sulfate transformation and sulfur gas emissions in degraded vegetable soil treated by reductive soil disinfestation

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Journal of Environmental Sciences 2015年第10期27卷 112-120页

作者： Tianzhu Meng Tongbin Zhu jinbo zhang Zucong Cai School of Geography Sciences Nanjing Normal University Jiangsu Provincial Key Laboratory of Materials Cycling and Pollution Control Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application Key Laboratory of Virtual Geographic Environment (VGE) Ministry of EducationNanjing Normal University Jiangsu Key Laboratory of Environmental Change and Ecological Construction

Reductive soil disinfestation（RSD）, namely amending organic materials and mulching or flooding to create strong reductive status, has been widely applied to improve degraded ***, there is little information available about sulfate（SO4^2-） transformation and sulfur（S）gas emissions during RSD treatment to degraded vegetable soils, in which S is generally accumulated. To investigate the effects of liming on SO4^2-transformation and S gas emissions,two SO4^2--accumulated vegetable soils（denoted as S1 and S2） were treated by RSD, and RSD plus lime, denoted as RSD0 and RSD1, respectively. The results showed that RSD0 treatment reduced soil SO4^2-by 51% and 61% in S1 and S2, respectively. The disappeared SO4^2-was mainly transformed into the undissolved form. During RSD treatment, hydrogen sulfide（H2S）,carbonyl sulfide（COS）, and dimethyl sulfide（DMS） were detected, but the total S gas emission accounted for 〈 0.006% of total S in both soils. Compared to RSD0, lime addition stimulated the conversion of SO42-into undissolved form, reduced soil SO4^2-by 81% in S1 and 84% in S2 and reduced total S gas emissions by 32% in S1 and 57% in S2, respectively. In addition to H2S, COS and DMS, the emissions of carbon disulfide, methyl mercaptan, and dimethyl disulfide were also detected in RSD1 treatment. The results indicated that RSD was an effective method to remove SO4^2-, liming stimulates the conversion of dissolved SO4^2-into undissolved form,probably due to the precipitation with calcium.

关键词： Vegetable soil Reductive soil disinfestations Lime Sulfate Sulfur gases

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Effect of orchard age on soil nitrogen transformation in subtropical China and implications

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Journal of Environmental Sciences 2015年第8期27卷 10-19页

作者： Yushu zhang jinbo zhang Tongbin Zhu Christoph Müller Zucong Cai School of Geography Sciences Nanjing Normal University Institute of Soil and Fertilizer Fujian Academy of Agricultural Sciences Jiangsu Provincial Key Laboratory of Materials Cycling and Pollution Control Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application Key Laboratory of Virtual Geographical Environment Ministry of Education Nanjing Normal University Department of Plant Ecology Justus-Liebig University Giessen

A better understanding of nitrogen transformation in soils could reveal the capacity for biological inorganic N supply and improve the efficiency of N fertilizers. In this study, a15 N tracing study was carried out to investigate the effects of converting woodland to orchard, and orchard age on the gross rates of N transformation occurring simultaneously in subtropical soils in Eastern China. The results showed that inorganic N supply rate was remained constant with soil organic C and N contents increased after converting woodland into citrus orchard and with increasing orchard age. This phenomenon was most probably due to the increase in the turnover time of recalcitrant organic-N, which increased with decreasing soil p H along with increasing orchard age significantly. The amo A gene copy numbers of both archaeal and bacterial were stimulated by orchard planting and increased with increasing orchard age. The nitrification capacity（defined as the ratio of gross rate of nitrification to total gross rate of mineralization） increased following the Michaelis–Menten equation, sharply in the first 10 years after woodland conversion to orchard, and increased continuously but much more slowly till 30 years. Due to the increase in nitrification capacity and unchanged NO3-consumption, the dominance of ammonium in inorganic N in woodland soil was shifted to nitrate dominance in orchard soils. These results indicated that the risk of NO3-loss was expected to increase and the amount of N needed from fertilizers for fruit growth did not change although soil organic N accumulated with orchard age.

关键词： 15N tracing technique Gross rates of nitrogen transformation Subtropical orchard soil

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Enhanced capacitive energy storage and dielectric temperature stability of A-site disordered high-entropy perovskite oxides

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Journal of Materials Science & Technology 2023年第14期145卷 66-73页

作者： Yating Ning Yongping Pu Chunhui Wu Shiyu Zhou Lei zhang jinbo zhang Xian zhang Yangchao Shang School of Materials Science and Engineering Shaanxi University of Science&TechnologyXi’an 710021China School of Electronic Information and Artificial Intelligence Shaanxi University of Science and TechnologyXi’an 710021China

In this work,a novel high entropy perovskite oxide(1-x)(Na_(0.2)Bi_(0.2)Ba_(0.2)Sr_(0.2)Ca_(0.2))TiO_(3-x)NaNbO_(3)(abbrevi-ated as(1-x)NBBSCT-x NN,x=0,0.05,0.1,0.15,and 0.2)was designed to improve temperature dielectric stability and energy storage performance by combining relaxor and antiferroelectric *** optimal composition of x=0.2 exhibits a high energy storage density of 3.51 J/cm^(3),together with wide temperature stable stability(■<15%,-70 to 110℃),excellent frequency stability(W rec andηvary by only±2.1%and±5.2%within the range of 1-600 Hz)and fast discharge rate(t_(0.9)=55.2 ns).This is mainly due to the enhancement of relaxation behavior and increase of E b caused by the decrease of grain *** results offer a new strategy for designing high entropy ceramic materials of high performance in the future.

关键词： Energy storage High-entropy perovskite Temperature stability Relaxor ferroelectrics

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Manifold optimization assisted centralized hybrid precoding for cell-free massive MIMO systems

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Science China(Information Sciences) 2023年第11期66卷 305-306页

作者： Jie LUO Jiancun FAN Yawen WANG jinbo zhang School of Information and Communications Engineering Xi'an Jiaotong University Science and Technology on Communication Networks Laboratory the 54th Research Institute of CETC

In the sixth generation(6G) wireless communication, cellfree massive multiple-input multiple-output(MIMO) has emerged as a promising technology due to it can improve macro diversity gain, enhance edge user service quality, and reduce path loss [1]. To suppress inter-user interference and improve spectral efficiency, the design of the precoding scheme is important.

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Semiglobal Saturated Practical Stabilization for Nonholonomic Mobile Robots With Uncertain Parameters and Angle Measurement Disturbance

Semiglobal Saturated Practical Stabilization for Nonholonomi...

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第25届中国控制与决策会议

作者： Hua Chen jinbo zhang Mathematics and Physics Department Hohai University Jiangsu Key Laboratory of Power Transmission and Distribution Equipment Technology Hohai University

ISBN: (纸本)9781467355339

In this paper, the semiglobal stabilization problem is addressed for a class of uncertain nonholonomic mobile robots with input saturation. By solving the linear inequalities, a new switching controller is presented in the presence of parametric uncertainties and angle measurement disturbance. Under the proposed controller, it is rigorously proved that all the states of the closed loop system can be stabilized to the any prescribed small interval around zero. Finally, a numerical example illustrate the effectiveness of the control design method.

关键词： Nonholonomic mobile robots input saturation uncertain parameters angle measurement disturbance.

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Laser-Derived Interfacial Confinement Enables Planar Growth of 2D SnS_(2) on Graphene for High-Flux Electron/Ion Bridging in Sodium Storage

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Nano-Micro Letters 2022年第6期14卷 65-80页

作者： Xiaosa Xu Fei Xu Xiuhai zhang Changzhen Qu jinbo zhang Yuqian Qiu Rong Zhuang Hongqiang Wang State Key Laboratory of Solidification Processing Centre for Nano Energy MaterialsSchool of Materials Science and EngineeringNorthwestern Polytechnical UniversityShaanxi Joint Laboratory of Graphene(NPU)Xi’an 710072People’s Republic of China

Establishing covalent heterointerfaces with face-to-face contact is promising for advanced energy storage,while challenge remains on how to inhibit the anisotropic growth of nucleated crystals on the ***,faceto-face covalent bridging in-between the 2 D-nanosheets/graphene heterostructure is constructed by intentionally prebonding of laser-manufactured amorphous and metastable nanoparticles on graphene,where the amorphous nanoparticles were designed via the competitive oxidation of Sn-O and Sn-S bonds,and metastable feature was employed to facilitate the formation of the C-S-Sn covalent bonding in-between the *** face-to-face bridging of ultrathin SnS;nanosheets on graphene enables the heterostructure huge covalent coupling area and high loading and thus renders unimpeded electron/ion transfer pathways and indestructible electrode structure,and impressive reversible capacity and rate capability for sodium-ion batteries,which rank among the top in records of the SnS_(2)-based *** work thus provides an alternative of constructing heterostructures with planar interfaces for electrochemical energy storage and even beyond.

关键词： Laser-manufacturing Metastable Interfacial engineering Covalent bridging Na-storage

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Effects of water regime, crop residues, and application rates on control of Fusarium oxysporum ***

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Journal of Environmental Sciences 2015年第5期27卷 30-37页

作者： Teng Wen Xinqi Huang jinbo zhang Tongbin Zhu Lei Meng Zucong Cai School of Geography Sciences Nanjing Normal University Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil Science Chinese Academy of Sciences College of Agriculture Hainan University

Biological soil disinfestation is an effective method to control soil-borne disease by flooding and incorporating with organic amendments, but field conditions and resources sometimes limited its practical application. A laboratory experiment was conducted to develop practice guidelines on controlling Fusarium wilt, a widespread banana disease caused by Fusarium oxysporum f. sp. cubense（FOC）. FOC infested soil incorporated with rice or maize straw at rates of 1.5 tons/ha and 3.0 tons/ha was incubated under flooded or water-saturated（100% water holding capacity） conditions at 30℃ for 30 days. Results showed that FOC populations in the soils incorporated with either rice or maize straw rapidly reduced more than 90% in the first 15 days and then fluctuated till the end of incubation, while flooding alone without organic amendment reduced FOC populations slightly. The rapid and dramatic decrease of redox potential（down to- 350 m V） in straw-amended treatments implied that both anaerobic condition and strongly reductive soil condition would contribute to pathogen inactivation. Water-saturation combined with straw amendments had the comparable effects on reduction of FOC, indicating that flooding was not indispensable for inactivating FOC. There was no significant difference in the reduction of FOC observed in the straw amendments at between 1.5 and 3 tons/ha. Therefore,incorporating soil with straw（rice or maize straw） at a rate of 3.0 tons/ha under 100%water holding capacity or 1.5 tons/ha under flooding, would effectively alleviate banana Fusarium wilt caused by FOC after 15-day treating under 30℃.

关键词： Biological soil disinfestation Banana Fusarium wilt Organic amendments Water regime treatment duration Treatment duration

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Design of a UCA structure with maximum capacity for mm Wave LOS MIMO systems

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Science China(Information Sciences) 2022年第3期65卷 286-287页

作者： Jiancun FAN Hongji LIU Jie LUO Xinmin LUO jinbo zhang The School of Information and Communications Engineering Xi'an Jiaotong University The 54th Research Institute of CETC (CETC-54)

Dear editor,In millimeter wave(mm Wave) systems, traditional multiple input multiple output(MIMO) may become line-of-sight(LOS) MIMO [1], and the rank of the channel matrix using the traditional antenna structure becomes very small [2]. A lower rank implies a low channel capacity [3]. The channel capacity of an LOS MIMO system can be enhanced by adjusting the array diameter of a uniform circular array(UCA), but the channel matrix cannot reach full rank when the UCA contains more than four antennas [4].

关键词： antenna arrays Millimeter wave radio communication Optimization methods UCA LOS MIMO

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Effects of six years of simulated N deposition on gross soil N transformation rates in an old-growth temperate forest

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Journal of Forestry Research 2018年第3期29卷 644-653页

作者： Peng Tian jinbo zhang Christoph Müller Zucong Cai Guangze Jin College of Forestry Northeast Forestry UniversityHarbin 150040HeilongjiangPeople’s Republic of China School of Geography Sciences Nanjing Normal UniversityNanjing 210023People’s Republic of China Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application Nanjing 210023People’s Republic of China Department of Plant Ecology(IFZ) Justus-Liebig University GiessenHeinrich-Buff-Ring 2635392 GiessenGermany School of Biology and Environmental Science University College DublinDublinIreland

Elevated atmospheric nitrogen(N) deposition has been detected in many regions of China, but its effects on soil N transformation in temperate forest ecosystems are not well known. We therefore simulated N deposition with four levels of N addition rate(N0, N30, N60, and N120) for6 years in an old-growth temperate forest in Xiaoxing’an Mountains in Northeastern China. We measured gross N transformation rates in the laboratory usingN tracing technology to explore the effects of N deposition on soil gross N transformations taking advantage of N deposition soils. No significant differences in gross soil N transformation rates were observed after 6 years of N deposition with various levels of N addition rate. For all N deposition soils, the gross NH~+ immobilization rates were consistently lower than the gross N mineralization rates,leading to net N mineralization. Nitrate(NO~-) was primarily produced via oxidation of NH~+(i.e., autotrophic nitrification), whereas oxidation of organic N(i.e., heterotrophic nitrification) was negligible. Differences between the quantity of ammonia-oxidizing bacteria and ammonia-oxidizing archaea were not significant for any treatment, which likely explains the lack of a significant effect on gross nitrification rates. Gross nitrification rates were much higher than the total NO~- consumption rates,resulting in a build-up of NO~-, which highlights the high risk of N losses via NO~- leaching or gaseous N emissions from soils. This response is opposite that of typical N-limited temperate forests suffering from N deposition,suggesting that the investigated old-growth temperate forest ecosystem is likely to approach N saturation.

关键词： N deposition Gross soil N transformation Temperate forest ecosystem ^(15)N tracing technology

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