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| 1 | The learning performance of support vector machine classification based on Markov sampling显示文摘The previously known frameworks describing the consistency of support vector machine classification(SVMC) algorithm are usually based on the assumption of independent and identically distributed(i.i.d.) samples.In this paper we go far beyond these classical frameworks by studying the consistency of SVMC algorithm with uniformly ergodic Markov chain samples based on linear prediction models.We establish the bound on the consistency of SVMC algorithm with uniformly ergodic Markov chain samples,and show that SVMC algorithm with uniformly ergodic Markov chain samples is consistent.Inspired by the idea from Markov chain Monto Carlo(MCMC) methods,we introduce a new Markov sampling algorithm for classification to generate uniformly ergodic Markov chain samples from large data set,and present numerical studies on simulated data and benchmark repository using SVMC algorithm. | ZOU Bin PENG ZhiMing XU ZongBen | 2013 | Science China(Information Sciences)2013，56，3： | 9 |
| 2 | Photonic synapses with ultralow energy consumption for artificial visual perception and brain storage显示文摘The human visual system,dependent on retinal cells,can be regarded as a complex combination of optical system and nervous system.Artificial retinal system could mimic the sensing and processing function of human eyes.Optically stimulated synaptic devices could serve as the building blocks for artificial retinas and subsequent information transmission system to brain.Herein,photonic synaptic transistors based on polycrystalline MoS_(2),which could simulate human visual perception and brain storage,are presented.Moreover,the photodetection range from visible light to near-infrared light of MoS_(2) multilayer could extend human eyes’vision limitation to near-infrared light.Additionally,the photonic synaptic transistor shows an ultrafast speed within 5μs and ultralow power consumption under optical stimuli about 40 aJ,several orders of magnitude lower than biological synapses(50 ms and 10 fJ).Furthermore,the backgate control could act as emotional modulation of the artificial brain to enhance or suppress memory function,i.e.the intensity of photoresponse.The proposed carrier trapping/detrapping as the main working mechanism is presented for the device.In addition,synaptic functionalities including short synaptic plasticity,long synaptic plasticity and paired-pulse facilitation could be successfully simulated based on the prepared device.Furthermore,the large difference between short synaptic plasticity and long synaptic plasticity reveals the better image pre-processing function of the prepared photonic synapses.The classical Pavlovian conditioning associated with the associative learning is successfully implemented as well.Therefore,the efficient and rich functionalities demonstrate the potential of the MoS_(2) synaptic device that integrates sensing-memory-preprocessing capabilities for realizing artificial neural networks with different emotions that mimic human retina and brain. | Caihong Li Wen Du Yixuan Huang Jihua Zou Lingzhi Luo Song Sun Alexander OGovorov Jiang Wu Hongxing Xu Zhiming Wang | 2022 | Opto-Electronic Advances2022，5，9： | 3 |
| 3 | Band structure engineering through van der Waals heterostructing superlattices of two-dimensional transition metal dichalcogenides显示文摘The indirect-to-direct band-gap transition in transition metal dichalcogenides(TMDCs)from bulk to monolayer,accompanying with other unique properties of two-dimensional materials,has endowed them great potential in optoelectronic devices.The easy transferability and feasible epitaxial growth pave a promising way to further tune the optical properties by constructing van der Waals heterostructures.Here,we performed a systematic high-throughput first-principles study of electronic structure and optical properties of the layerby-layer stacking TMDCs heterostructing superlattices,with the configuration space of[(MX2)n(M0X02)10−n](M/M0=Cr,Mo,W;X/X0=S,Se,Te;n=0-10).Our calculations involving long-range dispersive interaction show that the indirect-to-direct band-gap transition or even semiconductor-to-metal transition can be realized by changing component compositions of superlattices.Further analysis indicates that the indirect-to-direct band-gap transition can be ascribed to the in-plane strain induced by lattice mismatch.The semiconductor-to-metal transition may be attributed to the band offset among different components that is modified by the in-plane strain.The superlattices with direct band-gap show quite weak band-gap optical transition because of the spacial separation of the electronic states involved.In general,the layers stacking-order of superlattices results in a small up to 0.2 eV band gap fluctuation because of the built-in potential.Our results provide useful guidance for engineering band structure and optical properties in TMDCs heterostructing superlattices. | Xin-Gang Zhao Zhiming Shi Xinjiang Wang Hongshuai Zou Yuhao Fu Lijun Zhang | 2021 | InfoMat2021，3，2： | 2 |
| 4 | Prediction of Dynamic Wellbore Pressure in Gasified Fluid Drilling显示文摘The basis of designing gasified drilling is to understand the behavior of gas/liquid two-phase flow in the wellbore. The equations of mass and momentum conservation and equation of fluid flow in porous media were used to establish a dynamic model to predict wellbore pressure according to the study results of Ansari and Beggs-Brill on gas-liquid two-phase flow. The dynamic model was solved by the finite difference approach combined with the mechanistic steady state model. The mechanistic dynamic model was numerically implemented into a FORTRAN 90 computer program and could simulate the coupled flow of fluid in wellbore and reservoir. The dynamic model revealed the effects of wellhead back pressure and injection rate of gas/liquid on bottomhole pressure. The model was validated against full-scale experimental data,and its 5.0% of average relative error could satisfy the accuracy requirements in engineering design. | Wang Zhiming Ping Liqiu Zou Ke | 2007 | Petroleum Science2007，4，4： | 2 |
| 5 | Effects of Long-Term Fertilization Strategies on Soil Productivity and Soybean Rhizobial Diversity in a Chinese Mollisol显示文摘Rhizobial diversity is affected by interactions between soil features, fertilization strategy, and cropping system. However, interactions among the rhizobial community, chemical-organic manure fertilization, and plant production have not been well documented in Mollisols from long-term experiments. Aimed at maintaining and recovering the productivity of Chinese Mollisols, a long-term fertilization experiment had been carried out for 29 years under a wheat-maize-soybean rotation system, involving the application of recycled organic manure (ROM), chemical fertilizers (N, P, and/or K), or ROM plus N, P, and/or K. In the present study, the effects of different treatments were evaluated by determining soil physicochemical features, soybean production, and soybean rhizobial diversity. The results showed that application of ROM plus NPK maintained or increased soil fertility, which was accompanied by higher production and higher diversity of rhizobia, as compared with the other treatments. The negative association of Bradyrhizobium japonicum with N fertilizer, positive association of B. diazoefficiens with soil pH, and alleviation of N-inhibition on the diversity of Bradyrhizobium by the addition of ROM were recorded as new findings. Therefore, application of ROM or ROM plus NPK could be a feasible strategy for maintaining and recovering the fertility of Chinese Mollisols, whereas rhizobial diversity could be an indicator of soil fertility. | YAN Jun HAN Xiaozeng CHEN Xu LU Xinchun CHEN Wenfeng WANG Entao ZOU Wenxiu ZHANG Zhiming | 2019 | Pedosphere2019，29，6： | 1 |
| 6 | Transcriptomic responses in resistant and susceptible maize infected with Fusarium graminearum显示文摘Gibberella ear rot(GER)caused by Fusarium graminearum(teleomorph Gibberella zeae)is a common maize disease that not only severely reduces grain yield but also contaminates maize grain with mycotoxins.We investigated the molecular mechanism underlying the host defense responses against pathogen infection using comparative transcriptomic analysis.We injected F.graminearum spore suspensions into plants of resistant(IBM-81)and a susceptible(IBM-85)maize inbred line after pollination and performed RNA-seq 48,72,and 96 h after inoculation.Respectively 487 and 410 differentially expressed genes(DEGs)were induced in the resistant and susceptible lines across three time points,indicating that a stronger defense response was activated in the resistant than in the susceptible line.Among them,198 genes commonly induced in the two lines were subjected to pathway analysis,revealing that most of the DEGs were closely associated with defense and a wide range of metabolic activities.DEGs associated with pathogenesis-related protein 1(PR1)and regulation of salicylic acid were significantly enriched during F.graminearum infection,suggesting that these DEGs play dominant roles in maize resistance to GER.Our results provide a resource for future gene discovery and facilitate elucidation of the complex defense mechanisms involved in resistance to GER. | Guangsheng Yuan Xiujing He Hui Li Kui Xiang Li Liu Chaoying Zou Haijian Lin Jiali Wu Zhiming Zhang Guangtang Pan | 2020 | The Crop Journal2020，8，1： | 1 |
| 7 | Swelling Process of Thin Polymer Film Studied via in situ Spectroscopic Ellipsometry显示文摘 | XU Lin ZOU Zhiming ZHANG Huanhuan SHI Tongfei | 2017 | Chemical Research in Chinese Universities2017，33，5： | 0 |
| 8 | Two-dimensional ferromagnetic superlattices显示文摘Mechanically exfoliated two-dimensional ferromagnetic materials(2D FMs)possess long-range ferromagnetic order and topologically nontrivial skyrmions in few layers.However,because of the dimensionality effect,such few-layer systems usually exhibitmuch lower Curie temperature(TC)compared to their bulk counterparts.It is therefore of great interest to explore effective approaches to enhance their TC,particularly in wafer-scale for practical applications.Here,we report an interfacial proximity-induced high-TC 2D FM Fe3GeTe2(FGT)via A-type antiferromagnetic material CrSb(CS)which strongly couples to FGT.A superlattice structure of(FGT/CS)n,where n stands for the period of FGT/CS heterostructure,has been successfully produced with sharp interfaces by molecular-beam epitaxy on 2-inch wafers.By performing elemental specific X-ray magnetic circular dichroism(XMCD)measurements,we have unequivocally discovered that TC of 4-layer Fe3GeTe2 can be significantly enhanced from 140 K to 230 K because of the interfacial ferromagnetic coupling.Meanwhile,an inverse proximity effect occurs in the FGT/CS interface,driving the interfacial antiferromagnetic CrSb into a ferrimagnetic state as evidenced by double-switching behavior in hysteresis loops and the XMCD spectra.Density functional theory calculations show that the Fe-Te/Cr-Sb interface is strongly FMcoupled and doping of the spin-polarized electrons by the interfacial Cr layer gives rise to the TC enhancement of the Fe3GeTe2 films,in accordance with our XMCDmeasurements.Strikingly,by introducing rich Fe in a 4-layer FGT/CS superlattice,TC can be further enhanced to near room temperature.Our results provide a feasible approach for enhancing the magnetic order of few-layer 2D FMs in wafer-scale and render opportunities for realizing realistic ultra-thin spintronic devices. | Shanshan Liu Ke Yang Wenqing Liu Enze Zhang Zihan Li Xiaoqian Zhang Zhiming Liao Wen Zhang Jiabao Sun Yunkun Yang Han Gao Ce Huang Linfeng Ai Ping Kwan Johnny Wong Andrew Thye Shen Wee Alpha TN’Diaye Simon AMorton Xufeng Kou Jin Zou Yongbing Xu Hua Wu Faxian Xiu | 2020 | National Science Review2020，7，4： | 0 |
| 9 | Effects of Agro-antibiotic 211 on Related Substances Inducing Rice Resistance to Sheath Blight显示文摘[Objective] The paper was to explore the effect of agro-antibiotic 211, the active substance produced by streptomyces JD211, on rice resistance to sheath blight. [Method] Through pot experiment, the induction effect of agro-antibiotic 211 on rice resistance against sheath blight was analyzed, and the effect on phenolic metabolites and pathogenesis-related proteins were studied.[Result] The total phenol, phenylalanine ammonialyase, lignin, chitinase and β-1, 3-glucanase of rice leaves treated by agro-antibiotic 211 were slightly higher than that in control. At 96 h post treatment, the activity of β-1, 3-glucanase was 36.84% and 10.48% higher than that of blank control and CK+ Rhizoctonia solani, respectively; at120 h post treatment, the activity of phenylalanine ammonia-lyase were 42.13% and 62.28% higher than that of blank control and CK+ R. solani,respectively. The effect of agro-antibiotic 211 + R. solani was equal or slightly higher than that of Jinggangmycin + R. solani. [Conclusion] Agroantibiotic 211 induced rice resistance against sheath blight, and was closely related to the accumulation of phenolic substances and the increase of pathogenesis-related proteins. | Li Zhang Wang Qingsong Wei Limei Zou Zhiming Wei Saijin | 2019 | Plant Diseases and Pests2019，10，1： | 0 |
| 10 | Tuning 2D magnetism in Fe_(3+X)GeTe_(2) films by element doping显示文摘Two-dimensional(2D)ferromagnetic materials have been discovered with tunable magnetism and orbital-driven nodal-line features.Controlling the 2D magnetism in exfoliated nanoflakes via electric/magnetic fields enables a boosted Curie temperature(T_(C))or phase transitions.One of the challenges,however,is the realization of high T_(C) 2D magnets that are tunable,robust and suitable for large scale fabrication.Here,we report molecular-beam epitaxy growth of wafer-scale Fe_(3+X)GeTe_(2) films with T_(C) above room temperature.By controlling the Fe composition in Fe_(3+X)GeTe_(2),a continuously modulated T_(C) in a broad range of 185–320 K has been achieved.This widely tunable TC is attributed to the doped interlayer Fe that provides a 40%enhancement around the optimal composition X=2.We further fabricated magnetic tunneling junction device arrays that exhibit clear tunneling signals.Our results show an effective and reliable approach,i.e.element doping,to producing robust and tunable ferromagnetism beyond room temperature in a large-scale 2D Fe_(3+X)GeTe_(2) fashion. | Shanshan Liu Zihan Li Ke Yang Enze Zhang Awadhesh Narayan Xiaoqian Zhang Jiayi Zhu Wenqing Liu Zhiming Liao Masaki Kudo Takaaki Toriyama Yunkun Yang Qiang Li Linfeng Ai Ce Huang Jiabao Sun Xiaojiao Guo Wenzhong Bao Qingsong Deng Yanhui Chen Lifeng Yin Jian Shen Xiaodong Han Syo Matsumura Jin Zou Yongbing Xu Xiaodong Xu Hua Wu Faxian Xiu | 2022 | National Science Review2022，9，6： | 0 |
| 11 | Algorithm of Vertical Profiles of Radar Echoes between Any Two Points Based on Webpage and Its Application显示文摘Based on the puzzle data of radar reflectivity in and around Jiangxi Province,the slope profile method and the polar coordinate method were used to display the vertical profiles of radar echoes between any two points.The technical route of extracting radar echo profile data by the slope method was proposed and applied to the short-term early warning platform of Jiangxi Province.A thunderstorm weather process occurring from Dongxiang to Wannian on September 23,2018 was analyzed by radar echo profiles.At present,the program has been applied to the short-term early warning platform of Jiangxi Province based on B/S architecture.The automatic drawing and display of radar echo profiles of any two points is practical for forecasters to quickly and effectively track short-term strong convection weather. | Lei LI Haibo ZOU Zhiming HE | 2020 | Meteorological and Environmental Research2020，11，1： | 0 |
| 12 | Influence of impurity hydrogen on the structure and properties of bulk Li and pressure effects显示文摘The structure and properties of a 16-atom body-centered cubic lithium cell with an interstitial hydrogen atom are studied using a pseudopotential-plane-wave method within the density functional theory at 0 K and high pressures. The host lattice is dra-matically distorted by the introduction of H. Although the hydrogen atom is stable at the tetragonal site in perfect bcc host lattice,it favors the octahedral site formed by six non-equivalent Li atoms after full relaxation of the cell,showing P4/mmm symmetry within the pressures ranging from 0 to 6 GPa. The lattice ratio (a/c) changes irregularly with external pressure at about 3 GPa. The hydrogen band lies in the bottom of the valence band,separated by a gap from the metallic bands,illustrating the electronegativity of hydrogen. High reflectivity in the low frequency area induced by the impurity hydrogen is observed when only interband transitions are taken account of. A dip in reflectivity due to parallel band transitions is observed at ~0.4 eV. Another dip at ~4.3 eV appears when external pressure increases over 4 GPa. | LIU Zhiming MA Yanming HE Zhi GUI Tian HE Wenjiong LIU Bingbing ZOU Guangtian | 2006 | Science China(Physics,Mechanics & Astronomy)2006，49，6： | 0 |
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