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野生二粒小麦AP2家族基因鉴定与表达模式分析

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麦类作物学报 2025年第1期45卷 24-36页

作者：刘涛曹启彬卫科旭张艳聂小军童维西北农林科技大学农学院陕西杨凌712100

AP2转录因子在植物信号转导、生长发育和胁迫响应方面发挥着重要作用。为探索AP2转录因子在野生二粒小麦中的分子特征,基于野生二粒小麦基因组信息,采用Blast和Hmmer进行AP2家族成员鉴定,对鉴定到的成员进行蛋白质理化性质、亚细胞定位... 详细信息

AP2转录因子在植物信号转导、生长发育和胁迫响应方面发挥着重要作用。为探索AP2转录因子在野生二粒小麦中的分子特征,基于野生二粒小麦基因组信息,采用Blast和Hmmer进行AP2家族成员鉴定,对鉴定到的成员进行蛋白质理化性质、亚细胞定位、系统进化树、保守结构域、基因扩增、顺式作用元件、密码子偏好性、表达模式和遗传多样性分析。结果表明,在野生二粒小麦中共鉴定到265个AP2基因,主要定位在细胞核和叶绿体中。根据系统进化树将其分为3个亚族,各亚族之间的保守结构域和基因结构存在保守性与多样性。AP2含有多个与生长发育和非生物胁迫相关的顺式作用元件。AP2基因的密码子偏好性可能受到压力选择作用。从AP2基因的表达模式看,该家族成员可能发生了亚功能化,且对盐胁迫响应有重要作用。通过对不同小麦群体中核酸多样性和分化指数分析,AP2基因部分成员在野生二粒小麦中具有较高的遗传多样性。

关键词：野生二粒小麦 AP2基因进化分析表达模式遗传多样性

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Clogging processes caused by biofilm growth and organic particle accumulation in lab-scale vertical flow constructed wetlands

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Journal of Environmental Sciences 2009年第6期21卷 750-757页

作者： ZHAO Lianfang ZHU wei tong wei College of Environmental Science and Engineering Hohai University Nanjing 210098 China Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes Ministry of Education of China Nanjing 210098 China

The accumulation of organic matter in substratum pores is regarded as an important factor causing clogging separately in the subsurface flow constructed *** this study,the developing process of clogging caused by biofilm growth or organic particle accumulation instead of total organic matter accumulation was investigated in two groups of lab-scale vertical flow constructed wetlands（VFCWs）,which were fed with glucose（dissolved organic matter） and starch（particulate organic matter） *** showed that the growth of biofilms within the substratum pores certainly caused remarkable reduction of effective porosity,especially for the strong organic wastewater,whereas its influence on infiltration rate was *** was implied that the most important contribution of biofilm growth to clogging was accelerating the occurrence of *** comparison with biofilm growth,particles accumulation within pores could rapidly reduce infiltration rate besides effective porosity and the clogging occurred in the upper 0-15 cm *** approximately equal amount of accumulated organic matter,the effective porosity of the clogged layer in starch-fed systems was far less than that of glucose-fed systems,which indicated that composition and accumulation mode in addition to the amount of the accumulated organic matter played an important role in causing clogging.

关键词： clogging constructed wetland organic matter particle accumulation biofilms

Residual diverse ensemble for long-tailed multi-label text classification

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Science China(Information Sciences) 2024年第11期67卷 92-105页

作者： Jiangxin SHI tong wei Yufeng LI National Key Laboratory for Novel Software Technology Nanjing University School of Artificial Intelligence Nanjing University School of Computer Science and Engineering Southeast University Key Laboratory of Computer Network and Information Integration Southeast UniversityMinistry of Education

Long-tailed multi-label text classification aims to identify a subset of relevant labels from a large candidate label set, where the training datasets usually follow long-tailed label distributions. Many of the previous studies have treated head and tail labels equally, resulting in unsatisfactory performance for identifying tail labels. To address this issue, this paper proposes a novel learning method that combines arbitrary models with two steps. The first step is the “diverse ensemble” that encourages diverse predictions among multiple shallow classifiers, particularly on tail labels, and can improve the generalization of tail *** second is the “error correction” that takes advantage of accurate predictions on head labels by the base model and approximates its residual errors for tail labels. Thus, it enables the “diverse ensemble” to focus on optimizing the tail label performance. This overall procedure is called residual diverse ensemble(RDE). RDE is implemented via a single-hidden-layer perceptron and can be used for scaling up to hundreds of thousands of labels. We empirically show that RDE consistently improves many existing models with considerable performance gains on benchmark datasets, especially with respect to the propensity-scored evaluation ***, RDE converges in less than 30 training epochs without increasing the computational overhead.

关键词： multi-label learning extreme multi-label learning long-tailed distribution multi-label text classification ensemble learning

Waveform Design for MIMO Radar with One-Bit DACs via Block-Sparse Semidefinite Relaxation

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Journal of Beijing Institute of Technology 2021年第4期30卷 323-339页

作者： tong wei Bin Liao the Interdisciplinary Centre for Security Reliability and Trust(SnT)University of LuxembourgL-1855Luxembourg the Guangdong Key Laboratory of Intelligent Information Processing Shenzhen UniversityShenzhen 518060China

Multiple-input multiple-output(MIMO)systems which deploy one-bit DACs are at-tractive in many fields,such as wireless communications and *** this paper,the problem of transmit waveform design in MIMO radar system with one-bit DACs is *** appropri-ately designing the transmitted QPSK signal waveforms,the majority of radiated energy can be fo-cused into the mainlobe region(s)by minimizing the integrated sidelobe to mainlobe ratio(ISMR)of beampattern,such that the intensity of backscattered signals from targets can be ***,the resulting optimization problem which consists of constrained fractional quadratic problem(CFQP)is *** tackle this problem,a block-sparse semidefinite relaxation meth-od is first utilized to reformulate the CFQP into a reduced convex semidefinite programming(SDP).Further,a customized interior point algorithm(IPA)is developed to solve the small-scale ***,the desirable one-bit transmit waveform sequence can be properly synthesized by us-ing Gaussian randomization *** simulation results demonstrate that the proposed method offer better performance than the state-of-the-art algorithms.

关键词： MIMO radar beampattern synthesis one-bit quantization waveform design

Causality Analysis of Futures Sugar Prices in Zhengzhou Based on Graphical Models for Multivariate Time Series

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Acta Mathematicae Applicatae Sinica 2016年第1期32卷 129-136页

作者： Jing XU Xing-wei tong School of Statistics University of International Business and Economics School of Statistics Beijing Normal University

This paper presents a method of constructing a mixed graph which can be used to analyze the causality for multivariate time *** construct a partial correlation graph at first which is an undirected *** every undirected edge in the partial correlation graph,the measures of linear feedback between two time series can help us decide its direction,then we obtain the mixed *** this method,we construct a mixed graph for futures sugar prices in Zhengzhou（ZF）,spot sugar prices in Zhengzhou（ZS） and futures sugar prices in New York（NF）.The result shows that there is a bi-directional causality between ZF and ZS,an unidirectional causality from NF to ZF,but no causality between NF and ZS.

关键词： causality partial spectral coherence partial correlation graph linear feedback mixed graph

Recent Developments of Transition Metal Compounds-Carbon Hybrid Electrodes for High Energy/Power Supercapacitors

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Nano-Micro Letters 2021年第8期13卷 231-262页

作者： Kang Ren Zheng Liu tong wei Zhuangjun Fan State Key Laboratory of Heavy Oil Processing School of Materials Science and EngineeringChina University of Petroleum(East China)Qingdao 266580People’s Republic of China

Due to their rapid power delivery,fast charging,and long cycle life,supercapacitors have become an important energy storage technology ***,to meet the continuously increasing demands in the fields of portable electronics,transportation,and future robotic technologies,supercapacitors with higher energy densities without sacrificing high power densities and cycle stabilities are still *** metal compounds(TMCs)possessing high theoretical capacitance are always used as electrode materials to improve the energy densities of ***,the power densities and cycle lives of such TMCs-based electrodes are still inferior due to their low intrinsic conductivity and large volume expansion during the charge/discharge process,which greatly impede their large-scale *** recently,the ideal integrating of TMCs and conductive carbon skeletons is considered as an effective solution to solve the above ***,we summarize the recent developments of TMCs/carbon hybrid electrodes which exhibit both high energy/power densities from the aspects of structural design strategies,including conductive carbon skeleton,interface engineering,and electronic ***,the remaining challenges and future perspectives are also highlighted so as to provide strategies for the high energy/power TMCs/carbon-based supercapacitors.

关键词： TMCs/carbon hybrid Supercapacitors High power density Carbon skeleton Interfacial engineering Transition metal electronic structure

Worst-Case Finish Time Analysis for DAG-Based Applications in the Presence of Transient Faults

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Journal of Computer Science & Technology 2016年第2期31卷 267-283页

作者： Xiao-tong Cui Kai-Jie Wu tong-Quan wei Hsing-Mean Sha Key Laboratory of Dependable Service Computing in Cyber Physical Society Chongqing University Chongqing 400014 China College of Computer Science Chongqing University Chongqing 400044 China Department of Computer Science and Technology East China Normal University Shanghai 200241 China

Tasks in hard real-time systems are required to meet preset deadlines, even in the presence of transient faults and hence the analysis of worst-case finish time （WCFT） must consider the extra time incurred by re-executing tasks that were faulty. Existing solutions can only estimate WCFT and usually result in significant under- or over-estimation. In this work, we conclude that a sufficient and necessary condition of a task set experiencing its WCFT is that its critical task incurs all expected transient faults. A method is presented to identify the critical task and WCFT in O（IVI ＋ IEI） where IVI and IEI are the number of tasks and dependencies between tasks, respectively. This method finds its application in testing the feasibility of directed acyclic graph （DAG） based task sets scheduled in a wide variety of fault-prone multi-processor systems, where the processors could be either homogeneous or heterogeneous, DVS-capable or DVS-incapable, etc. The common practices, which require the same time complexity as the proposed critical-task method, could either underestimate the worst case by up to 25%, or overestimate by 13%. Based on the proposed critical-task method, a simulated-annealing scheduling algorithm is developed to find the energy efficient fault-tolerant schedule for a given DAG task set. Experimental results show that the proposed critical-task method wins over a common practice by up to 40% in terms of energy saving.

关键词： fault tolerance worst-case analysis simulated annealing energy conservation dynamic voltage scaling (DVS)

Particulate matter exchange between atmosphere and roads surfaces in urban areas

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Journal of Environmental Sciences 2020年第12期32卷 118-123页

作者： tong wei Buddhi Wijesiri Yingxia Li Ashantha Goonetilleke State Key Laboratory of Water Environment Simulation School of EnvironmentBeijing Normal UniversityBeijing 100875China Science and Engineering Faculty Queensland University of Technology(QUT)GPO Box 2434Brisbane4001QueenslandAustralia

The deposition and the re-suspension of particulate matter(PM) in urban areas are the key processes that contribute not only to stormwater pollution, but also to air pollution. However, investigation of the deposition and the re-suspension of PM is challenging because of the difficulties in distinguishing between the resuspended and the deposited PM. This study created two Bayesian Networks(BN) models to explore the deposition and the re-suspension of PM as well as the important influential factors. The outcomes of BN modelling revealed that deposition and re-suspension of PM10 occurred under both, high-traffic and low-traffic conditions, and the re-suspension of PM2.5 occurred under low-traffic conditions. The deposition of PM10 under low-volume traffic condition is 1.6 times higher than under highvolume traffic condition, which is attributed to the decrease in PM10 caused by relatively higher turbulence under high-volume traffic conditions. PM10 is more easily resuspended from road surfaces compared to PM2.5 as the particles which larger than the thickness of the laminar airflow over the road surface are more easily removed from road surfaces. The increase in wind speed contributes to the increase in PM build-up by transporting particulates from roadside areas to the road surfaces and the airborne PM2.5 and PM10 increases with the increase in relative humidity. The study outcomes provide a step improvement in the understanding of the transfer processes of PM2.5 and PM10 between atmosphere and urban road surfaces, which in turn will contribute to the effective design of mitigation measures for urban stormwater and air pollution.

关键词： Bayesian networks(BN) Particle build-up Particulate re-suspension Road surfaces

A system dynamics urban water management model for Macao, China

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Journal of Environmental Sciences 2016年第12期28卷 117-126页

作者： tong wei Inchio Lou Zhifeng Yang Yingxia Li State Key Laboratory of Water Environment Simulation School of Environment Beijing Normal University Beijing 100875 China. Department of Civil and Environmental Engineering University of Macao Macao 999078 China

Urban water resources have been facing significant pressure from population growth, urbanization, and climate change. A system dynamics urban water management model was proposed to simulate the dynamic interactions between urban water demands and society, economy, climate, and water conservation. The residents＇ water conseration willingness was incorporated in the model and water-saving effects were quantified. The simulation results for Macao showed that population size was the main driving force for urban water demand. The change of temperature and precipitation has obvious effects on the landscape water demand. The water demand output is sensitive to the change in population, per capita demand, and temperature. Increased precipitation will reduce urban water demand and increased economic growth will increase water demand. By implementing integrated water conservation measures and imoroved water conservation willinmaess, water demand could be reduced bv 17.5%.

关键词： Macao System dynamics Water conservation willingness Water demand