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Monitoring impact of mefenacet treatment on soil microbial communities by PCR-DGGE fingerprinting and conventional testing procedures

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Journal of Environmental Sciences 2006年第2期18卷 373-378页

作者： ye Yang-fang MIN Hang LU Zhen-mei College of Life Science and Biotechnology Ningbo University Ningbo 315211 China College of Life Science Zhejiang University Hangzhou 310029 China

The effect of acetanilide herbicide mefenacet on soil microbial communities was studied using paddy soil samples with different short-term treatments. The culturable bacteria （plate counts）, dehydrogenase activity and changes in community structure （denaturing gradient gel electrophoresis （DGGE） analysis） were used for biological community assessments. Mefenacet was a significant stimulus to cultural aerobic bacteria and dehydrogenase activity while Sphingobacterium multivorum Y1, a bacterium efficiently degrading the mefenacet, only induced the increasing colony-forming unit （CFU） of bacteria but little effect on dehydrogenase activity during the whole experiment. The degree of similarity between the 16S rDNA profiles of the communities was quantified by numerically analyzing the DGGE band patterns. Similarity dendrograms showed that the microbial community structures of the mefenacet-treated and non-treated soils were not significantly different. But supplement of S. multivorum Y1 could increase the diversity of the microbial community in the mefenacet-polluted paddy soil. This work is a new attempt to apply the S. multivorum Y1 for remediation of the mefenacet-polluted environments.

关键词： denaturing gradient gel electrophoresis(DGGE) soil microbial diversity mefenacet dehydrogenase

Feasibility analysis of a single-sensor-based approach for source identification of hazardous chemical releases

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Chinese Journal of Chemical Engineering 2019年第7期27卷 1642-1650页

作者： Zengqiang Chen Lian ye Bo Dai fang Wang College of Information Engineering Beijing Institute of Petrochemical TechnologyBeijing 102617China School of Metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing 100083China Office of Academic Affairs Beijing Institute of Petrochemical TechnologyBeijing 102617China

Source identification is critical for emergency responses to hazardous chemical releases,especially sudden releases of toxic *** timely arrangement of multiple sensors at the scene of a sudden accident is *** overcome this limitation,a two-step source identification method based on a single sensor was *** the first step,the measured concentration was transmitted to the computing ***,a preliminary estimation of the release source was calculated from recently detected ***,the preliminary result was used to predict the concentrations and to assess whether more measurements were *** data processing was conducted by the computing *** the second step,a new objective monitoring point was transmitted to the detector for the measurement of additional *** two steps were conducted repeatedly until the estimation adequately represented the release *** fixed and mobile single sensor results were analyzed,and a comparison to multi-sensor results was also *** results show that single-sensor source identification is attainable with a sufficient number of observations,and the number of valid concentration observations is required to be no less than the number of unknown *** best estimate the release source,the movement strategy of the single sensor was based on the possible release source and the hazard partition of the gas *** is highly recommended that the single-sensor source identification method be used in unexpected incidents due to its flexibility and timely response.

关键词： Safety analysis Emergency response Inverse problems Optimization dispersion model

Data-driven discovery of linear dynamical systems from noisy data

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Science China(Technological Sciences) 2024年第1期67卷 121-129页

作者： WANG YaSen YUAN ye fang HuaZhen diNG Han School of Mechanical Science and Engineering Huazhong University of Science and TechnologyWuhan 430074China State Key Lab of digital Manufacturing Equipment and Technology Huazhong University of Science and TechnologyWuhan 430074China School of Artificial Intelligence and Automation Huazhong University of Science and TechnologyWuhan 430074China Department of Mechanical Engineering University of KansasLawrence 66045USA

In modern science and engineering disciplines,data-driven discovery methods play a fundamental role in system modeling,as data serve as the external representations of the intrinsic mechanisms within ***,empirical data contaminated by process and measurement noise remain a significant obstacle for this type of *** this study,we have developed a data-driven method capable of directly uncovering linear dynamical systems from noisy *** method combines the Kalman smoothing and sparse Bayesian learning to decouple process and measurement noise under the expectation-maximization framework,presenting an analytical method for alternate state estimation and system ***,the discovered model explicitly characterizes the probability distribution of process and measurement noise,as they are essential for filtering,smoothing,and stochastic *** have successfully applied the proposed algorithm to several simulation *** results demonstrate its potential to enable linear dynamical system discovery in practical applications where noise-free data are intractable to capture.

关键词： system identification sparse Bayesian learning Kalman smoothing process and measurement noise

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Editorial for the Special Issue on Precision Engineering

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Engineering 2018年第6期4卷 743-744页

作者： Shenghua ye Fengzhou fang State Key Laboratory of Precision Measuring Technology and Instruments Tianjin UniversityTianjin 300072China

Precision engineering has developed from its original literal meaning of“making things precisely”into a sub-discipline of electrical engineering,software engineering,electronics engineering,mechanical engineering,and optical engineering that is concerned with designing machines,fixtures,and other structures that have exceptionally high tolerances,are repeatable,and are stable over *** advanced research on precision engineering,the behavior of an experimental system remains fully predictable,even including micro/nanoscale ***/nano-scale phenomena introduce a wide spectrum of unknown fields and promising applications that have driven researchers to dedicate themselves to work in molecular electronics,biomedical applications,picosecond lasers,nanometric fabrication,and micro/nano devices.

关键词： Editorial Special Issue Precision Engineering

Dark channel prior based blurred image restoration method using total variation and morphology

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Journal of Systems Engineering and Electronics 2015年第2期26卷 359-366页

作者： Yibing Li Qiang Fu fang ye Hayaru Shouno College of Information and Communication Engineering Harbin Engineering University Department of Information and Communication Engineering University of Electro-Communications

The blurred image restoration method can dramatically highlight the image details and enhance the global contrast, which is of benefit to improvement of the visual effect during practical ap- plications. This paper is based on the dark channel prior principle and aims at the prior information absent blurred image degradation situation. A lot of improvements have been made to estimate the transmission map of blurred images. Since the dark channel prior principle can effectively restore the blurred image at the cost of a large amount of computation, the total variation （TV） and image morphology transform （specifically top-hat transform and bottom- hat transform） have been introduced into the improved method. Compared with original transmission map estimation methods, the proposed method features both simplicity and accuracy. The es- timated transmission map together with the element can restore the image. Simulation results show that this method could inhibit the ill-posed problem during image restoration, meanwhile it can greatly improve the image quality and definition.

关键词： image restoration dark channel prior total variation (TV) morphology transform

Variation of soil enzyme activity and microbial biomass in poplar plantations of different genotypes and stem spacings

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Journal of Forestry Research 2018年第4期29卷 958-967页

作者： ye Li Liping Zhang Shengzuo fang ye Tian Jiao Guo College of Forestry Nanjing Forestry University Co-Innovation Center for Sustainable Forestry in Southern China Nanjing Forestry University

To improve the productivity of poplar planta- tions, a field experiment of split-plot design with four tree spacings and three poplar clones was established, and four soil enzyme activities and microbial biomass were monitored in the trial. Soil enzyme activities, in most cases, were significantly higher in topsoil （0-10 cm） than in lower horizons （10-20 cm）. Soil cellulase, catalase and protease activities during the growing season were higher than during the non-growing season, while invertase activity followed the opposite trend. Soil invertase, cellulase and catalase activities varied by poplar clone but soil protease activity did not. Cellulase and protease activities in the plantation at 5 × 5 m spacing were significantly higher than in the other spacings. The highest catalase activity was recorded at 6 × 6 m spacing. At the same planting density, invertase activity was greater in square spacings than in rectangular spacings. Soil microbial biomass was also significantly affected by seedling spacing and poplar clone. The mean soil MBC was significantly lower in topsoil than in the lower horizon, while MBN showed the opposite pattern. Significantly positive correlations were observed among soil cellulase, protease and catalase activities （p 〈0.01）, whereas soil invertase activity was negatively and significantly correlated with cellulase, protease and catalase activities （p 〈 0.01）. Soil microbial biomass and enzyme activities were not correlated except for a significantly negative correlation between soil MBC and catalase activities. Variations in soil enzyme activity and microbial biomass in different poplar plantations suggest that genotype and planting spacing should be considered when modeling soil nutrient dynamics and managing for long-term site productivity.

关键词： Microbial activity Nutrient availability Planting density Poplar clone Seasonal variation

Design and realization of threshold secret sharing scheme with random weights

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Journal of Systems Engineering and Electronics 2009年第5期20卷 1091-1095页

作者： ye Zhenjun fang Zhenming Wang Chunfeng Meng Fanzhen Dept. of Mathematics and Physics North China Electric Power Univ. Beijing 102206 P. R. China School of Management Tianjin Univ. Tianjin 300072 P. R. China School of Science Tianjin Univ. Tianjin 300072 P. R. China

A new threshold secret sharing scheme is constructed by introducing the concept of share vector, in which the number of shareholders can be adjusted by randomly changing the weights of them. This kind of scheme overcomes the limitation of the static weighted secret sharing schemes that cannot change the weights in the process of carrying out and the deficiency of low efficiency of the ordinary dynamic weighted sharing schemes for its resending process. Thus, this scheme is more suitable to the case that the number of shareholders needs to be changed randomly during the scheme is carrying out.

关键词： random weight secret sharing share vector.

Polarization of ∧'s Produced in S+Pb Collisions at 200 GeV/c per Nucleon

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Chinese Physics Letters 1996年第5期13卷 351-354页

作者： ye Yun-xiu SU Shu-fang JI Gang Department of Modern Physics University of Science arid Technology of ChinaHefei 230027 Department of Special Class for Gifted Young University of Science arid Technology of ChinaHefei 230027

The ∧^(0) polarization is analyzed with the experinental data in S+Pb collisions at energy 200GeV per nucleon,which were produced at SPS of *** *** rxalue and thecorrelation betrween the transverse polarization and t... 详细信息

关键词： GeV/c transverse Polarization

Deep Video Harmonization by Improving Spatial-temporal Consistency

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Machine Intelligence Research 2024年第1期21卷 46-54页

作者： Xiuwen Chen Li fang Long ye Qin Zhang Key Laboratory of Media Audio and Video Ministry of Education Communication University of ChinaBeijing 100024China

Video harmonization is an important step in video editing to achieve visual consistency by adjusting foreground appear-ances in both spatial and temporal *** methods always only harmonize on a single scale or ignore the inaccuracy of flow estimation,which leads to limited harmonization *** this work,we propose a novel architecture for video harmoniza-tion by making full use of spatiotemporal features and yield temporally consistent harmonized *** introduce multiscale harmon-ization by using nonlocal similarity on each scale to make the foreground more consistent with the *** also propose a fore-ground temporal aggregator to dynamically aggregate neighboring frames at the feature level to alleviate the effect of inaccurate estim-ated flow and ensure temporal *** experimental results demonstrate the superiority of our method over other state-of-the-art methods in both quantitative and visual comparisons.

关键词： Harmonization temporal consistency video editing video composition nonlocal similarity