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Characteristics of ozone and ozone precursors(VOCs and NOx) around a petroleum refinery in Beijing, China

Journal of Environmental Sciences 2014年第2期26卷 332-342页

作者： Wei Wei Shuiyuan Cheng Guohao Li Gang wang haiyang wang Department of Environmental Science and Engineering Beijing University of Technology State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex Tsinghua University

A field measurement campaign for ozone and ozone precursors （VOCs and NOx） was conducted in summer 2011 around a petroleum refinery in the Beijing rural region. Three observation sites were arranged, one at southwest of the refinery as the background, and two at northeast of the refinery as the downwind receptors. Monitoring data revealed the presence of serious surface 03 pollution with the characteristics of high average daily mean and maximum concentrations （64.0 and 145.4 ppbV in no-rain days, respectively） and multi-peak diurnal variation. For NOx, the average hourly concentrations of NO2 and NO were in the range of 20.546.1 and 1.8-6.4 ppbV, respectively. For VOC measurement, a total of 51 compounds were detected. Normally, TVOCs at the background site was only dozens of ppbC, while TVOCs at the downwind sites reached several hundreds of ppbC. By subtracting the VOC concentrations at background, chemical profiles of VOC emission from the refinery were obtained, mainly including alkanes （60.0% ± 4.3%）, alkenes （21.1% ± 5.5%） and aromatics （18.9% ±3.9%）. Moreover, some differences in chemical profiles for the same measurement hours were observed between the downwind sites; the volume ratios of alkanes with low reactivity and those of alkenes with high reactivity respectively showed an increasing trend and a decreasing trend. Finally, based on temporal and spatial variations of VOC mixing ratios, their photochemical degradations and dispersion degradations were estimated to be 0.15-0.27 and 0.42-0.62, respectively, by the photochemical age calculation method, indicating stronger photochemical reactions around the refinery.

关键词： ozone volatile organic compounds (VOCs) photochemical degradations petroleum refinery

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Breeding maize of ideal plant architecture for high-density planting tolerance through modulating shade avoidance response and beyond

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Journal of Integrative Plant Biology 2024年第5期66卷 849-864页

作者： Fereshteh Jafari Baobao wang haiyang wang Junjie Zou Biotechnology Research Institute Chinese Academy of Agricultural SciencesBeijing 100081China Graduate School of Chinese Academy of Agricultural Sciences Beijing 100081China National Nanfan Research Institute CAASSanya 572025China State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources College of Life SciencesSouth China AgriculturalUniversityGuangzhou 510642China

Maize is a major staple crop widely used as food,animal feed,and raw materials in industrial ***-density planting is a major factor contributing to the continuous increase of maize ***,high planting density usually triggers a shade avoidance response and causes increased plant height and ear height,resulting in lodging and yield *** plant height and ear height,more erect leaf angle,reduced tassel branch number,earlier flowering,and strong root system architecture are five key morphological traits required for maize adaption to high-density *** this review,we summarize recent advances in deciphering the genetic and molecular mechanisms of maize involved in response to high-density *** also discuss some strategies for breeding advanced maize cultivars with superior performance under high-density planting conditions.

关键词： flowering time high-density planting leaf angle maize plant architecture plant height/ear height root architecture tasselbranch

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UPA2 and ZmRAVL1:Promising targets of genetic improvement of maize plant architecture^∞

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Journal of Integrative Plant Biology 2020年第4期62卷 394-397页

作者： Dexin Kong Baobao wang haiyang wang State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources South China Agricultural UniversityGuangzhou 510642China Biotechnology Research Institute Chinese Academy of Agricultural SciencesBeijng 100081China

Maize(Zea mays ***)is a major staple crop,with the highest tonnage among cereal crops worldwide(FAO 2014).Over the past century,maize yields have increased about 8-fold in the US central Corm Belt(from 1,287 kg/ha in the 19305 to 11,084 kg/ha in 2017,http://***,Duvick 2005b)due to a combination of genetic gain resulting from breeding efforts and im-proved management practices(such as application of synthetic nitrogen fertilizers,weed,and pest control,increased efficiency of harvest equipment,etC.).A major management practice that contributed to the continuous yield increase is continual increases in planting density(from 30,000 plants per hectare or less in the 1930s to 80,000 plants per hectare or higher in the 1980s,Duvick 2005a,2005b).A series of retro-spective studies have suggested that newer hybrids yield more than older hybrids because of improved plant architecture better adapted to high density planting and increased ability to withstand various biotic and abiotic stresses associated with high density planting(ollenaar and Wu 1999;Duvick 2005a,2005b).Although lagging behind the United States,increasing planting density has been a popular practice in other countries as well for increasing grain yield per unit land area in the last few decades(Li et al.2011).

关键词： planting breeding crops

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Effect mechanism of seepage force on the hydraulic fracture propagation

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International Journal of Coal Science & Technology 2024年第3期11卷 223-240页

作者： haiyang wang Desheng Zhou Yi Zou Peng Zheng School of Petroleum Engineering Xi’an Shiyou UniversityXi’an710065China Engineering Research Center of Development and Management for Low to Extra-Low Permeability Oil and Gas Reservoirs in West China Ministry of EducationXi’an Shiyou UniversityXi’an710065ShaanxiChina Xi’an University of Science and Technology Xi’an710054ShaanxiChina

The flow of fluid through the porous matrix of a reservoir rock applies a seepage force to the solid rock *** the seepage force exerted by fluid flow through the porous matrix of a reservoir rock has a notable influence on rock deformation and failure,its effect on hydraulic fracture(HF)propagation remains ***,in this study,we improved a traditional fluid–solid coupling method by incorporating the role of seepage force during the fracturing fluid seepage,using the discrete element ***,we validated the simulation results of the improved method by comparing them with an analytical solution of the seepage force and published experimental ***,we conducted numerical simulations in both homogeneous and heterogeneous sandstone formations to investigate the influence of seepage force on HF *** results indicate that fluid viscosity has a greater impact on the magnitude and extent of seepage force compared to injection rate,and that lower viscosity and injection rate correspond to shorter hydraulic fracture ***,seepage force influences the direction of HF propagation,causing HFs to deflect towards the side of the reservoir with weaker cementation and higher permeability.

关键词： Hydraulic fracturing Seepage force Fracture propagation Discrete element method Reservoir heterogeneity

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Intelligent networking in adversarial environment:challenges and opportunities

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Science China(Information Sciences) 2022年第7期65卷 5-15页

作者： Yi ZHAO Ke XU Qi LI haiyang wang Dan wang Min ZHU Department of Computer Science and Technology Tsinghua University Department of Computer Science University of Minnesota Duluth Institute for Network Sciences and Cyberspace Tsinghua University Department of Computing The Hong Kong Polytechnic University Beijing National Research Center for Information Science and Technology (BNRist)

Although deep learning technologies have been widely exploited in many fields, they are vulnerable to adversarial attacks by adding small perturbations to legitimate inputs to fool targeted ***, few studies have focused on intelligent networking in such an adversarial environment, which can pose serious security threats. In fact, while challenging intelligent networking, adversarial environments also bring about opportunities. In this paper, we, for the first time, simultaneously analyze the challenges and opportunities that the adversarial environment brings to intelligent networking. Specifically, we focus on challenges that the adversarial environment will pose on the existing intelligent networking. Furthermore, we investigate frameworks and approaches that combine adversarial machine learning with intelligent networking to solve the existing deficiencies of intelligent networking. Finally, we summarize the issues, including opportunities and challenges, which can allow researchers to focus on intelligent networking in adversarial environments.

关键词： Intelligent Networking intelligent networking Adversarial adversarial Attacks attacks Defense defense Security security

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SMXL6/7/8:Dual-Function Transcriptional Repressors of Strigolactone Signaling

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Molecular Plant 2020年第9期13卷 1244-1246页

作者： Rongxin Shen Xingliang Ma haiyang wang State Key Laboratory for Conservation and Utilization of Subtropical AgroBioresources South China Agricultural UniversityGuangzhou 510642China Global Institute for Food Security University of SaskatchewanSaskatoonSKS7H 0W9Canada Gua ngdong Laboratory for Ling nan Modern Agriculture Guangzhou 510642China

Strigolactones(SLs)were recently identified as a new class of carotenoid-derived plant hormones that regulates many aspects of plant development and responses to both biotic and abiotic *** SLs are synthesized from its substrateβ-carotene with four successively acting enzymes,including DWARF27(D27),DWARF17(D17),DWARF10(D10),and MORE AXILLARY GROWTH 1(MAX1),and perceived by a noncanonicalα/β-hydrolase receptor DWARF14(D14).In the present of SLs,D14 is activated by ligand hydrolysis and conformational change.

关键词： hydrolysis successively canonical

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Enhanced methanation stability of nano-sized MoS2 catalysts by adding Al2O3

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Frontiers of Chemical Science and Engineering 2015年第1期9卷 33-39页

作者： Zhenhua LI Jia HE haiyang wang Baowei wang Xinbin MA Key Lab for Green Chemical Technology of Ministry of Education School of Chemical Engineering and Technology Tianjin University Tianjin 300072 China

A series of unsupported MoS2 catalysts with or without Al2O3 modification was prepared using a modified thermal decomposition approach. The catalysts were tested for the methanation of carbon monoxide and the optimum one has 25.6wt-% Al2O3 content. The catalysts were characterized by nitrogen adsorption measurement, X-ray diffraction and transmission electron microscopy. The results show that adding appropriate amount of Al2O3 increases the dispersion of MoS2, and the increased interaction force between MoS2 and Al2O3 can inhibit the sintering of active MoS2 to some extent.

关键词： unsupported catalyst molybdenum sulfide,stability alumina methanation

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The central circadian clock proteins CCA_1 and LHY regulate iron homeostasis in Arabidopsis

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Journal of Integrative Plant Biology 2019年第2期61卷 168-181页

作者： Gang Xu Zhimin Jiang haiyang wang Rongcheng Lin Key Laboratory of Photobiology Institute of Botany Chinese Academy of Sciences University of Chinese Academy of Sciences College of Life Sciences Shandong Agricultural University Institute of Genetics and Developmental Biology Chinese Academy of Sciences College of Life Sciences South China Agricultural University CAS Center for Excellence in Molecular Plant Sciences Chinese Academy of Sciences

Circadian clock is the endogenous timekeeping machinery that synchronizes an organism's metabolism, behavior, and physiology to the daily lightdark circles, thereby contributing to organismal ***(Fe) is an essential micronutrient for all organisms and it plays important roles in diverse processes of plant growth and development. Here, we show that, in Arabidopsis thaliana, loss of the central clock genes,CIRCADIAN CLOCK ASSOCIATED 1(CCA_1) and LATE ELONGATED HYPOCOTYL(LHY), results in both reduced Fe uptake and photosynthetic efficiency, whereas CCA_1 overexpression confers the opposite effects. We show that root Fe(III) reduction activity, and expression of FERRIC REDUCTION OXIDASE 2(FRO_2) and IRON-REGULATED TRANSPORTER 1(IRT_1) exhibit circadian oscillations, which are disrupted in the cca_1 lhy double mutant. Furthermore,CCA_1 directly binds to the specific regulatory regions of multiple Fe homeostasis genes and activates their expression. Thus, this study established that, in plants,CCA_1 and LHY function as master regulators that maintain cyclic Fe homeostasis.

关键词： CCA Fe

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Spurious Thermoluminescence Characteristics of the Ediacaran Doushantuo Formation(ca. 635–551 Ma) and Its Implications for Marine Dissolved Organic Carbon Reservoir

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Journal of Earth Science 2015年第6期26卷 883-892页

作者： haiyang wang Chao Li Chaoyong Hu Shucheng Xie State Key laboratory of Biogeology and Environment Geology China University of Geosciences School of Earth Sciences China University of Geosciences

The Ediacaran Doushantuo Formation（ca. 635–551 Ma） deposited immediately after the last Neoproterozoic glaciations and recorded the most prominent negative excursions of carbonate carbon isotopic composition（δ^（13）C（carb））. These excursions have been interpreted as a result of widespread remineralization of a large dissolved organic carbon（DOC） reservoir in the Ediacaran deep oceans. However, there is no direct evidence so far found in rocks for the proposed DOC reservoir, which devalues such an interpretation. Here, we conducted a detailed study on the glow-curves characteristics and signal origins of spurious thermoluminescence（TL） of the Doushantuo Formation at Jiulongwan in Yangtze Gorges area, South China, through sequential tests under CO2, N2 and air. Spurious TL intensities for test samples before and after removing soluble organic matter via accelerated solvent extraction（ASE） are nearly identical. Further, significant positive correlation between the spurious TL intensity and total inorganic carbon（TIC） content（R^2=0.7） indicate that the Doushantuo spurious TL with the characteristic peak at 393.5 °C from the sequential test is chemiluminescence（CL） which is derived from the oxidation of a type of non-volatile organic matter strongly associated with carbonate mineral lattice（termed as “X-OM”）. A most likely explanation is that the X-OM is a type of dissolved organic matter which co-precipitated with carbonate minerals into sediments in the Ediacaran Doushantuo Ocean. Furthermore, a significant exponential negative correlation（R^2=0.55） is observed between the CL data and the isotopic difference between carbonate and coexisting bulk organic matter（i.e., Δ^（13）C（carb-org）, a proxy for remineralization degree of DOC reservoir in proposed DOC hypothesis）, suggesting that the X-OM was derived from the oxidation of the DOC reservoir in the Ediacaran Ocean. We thus propose that the X-OM and its CL detected in our study may have recorded the evolution of the possi

关键词： Doushantuo Formation spurious thermoluminescence chemiluminescence carbonates,dissolved organic carbon.

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Analyzing and Designing Business Processes Management System Based on Transformation of Instantiated Ontology’s State

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Wuhan University Journal of Natural Sciences 2006年第5期11卷 1126-1131页

作者： YAO Qing wang haiyang College of Computer Science and Technology ShandongUniversity Jinan 250061 ShandongChina

The paper discusses efforts of finding a simple and transparent method to analyze business processes and developing its management system architecture. By introducing ontology and its state, the approach tried to find a unified representation and a flexible choreography of business processes. The main idea of the paper is the transformation of ontology＇s states, which are the most important scenarios of enterprises. The business activity composition, that is, case composition based on an AI technique, Case Based Reason （CBR）, which is to solve new problems by retrieving solutions to previous problems, and then store the modified solution. The main interest in CBR relies on that it allows a system to avoid past failures and exploit past successes.

关键词： ontology business process management (BPM) case based reason(CBR) state transform

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