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Journal of Systems Science & Complexity 2014年第2期27卷 276-288页

作者： sun yudong SHI Yimin GU Xin Department of Applied Mathematics Northwestern Polytechnical University Department of Methodology and Statistics Utrecht University

This paper studies the nonlinear variational inequality with integro-differential term arising from valuation of American style double barrier option. First, the authors use the penalty method to transform the variational inequality into a nonlinear parabolic initial boundary problem(i.e., penalty problem). Second, the existence and uniqueness of solution to the penalty problem are proved by using the Scheafer fixed point theory. Third, the authors prove the existence of variational inequality' solution by showing the fact that the penalized PDE converges to the variational inequality. The uniqueness of solution to the variational inequality is also proved by contradiction.

关键词： American style barrier option existence integro-differential uniqueness variational inequality.

Effect of Dodecylbenzene Sulfonic Acid Used as Additive on Residue Hydrotreating

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China Petroleum Processing & Petrochemical Technology 2015年第1期17卷 82-88页

作者： sun yudong Yang Chaohe College of Chemical Engineering China University of PetroleumQingdao

The effect of additive—dodecylbenzene sulfonic acid(DBSA)—on residue hydrotreating was studied in the au toclave. The results showed that the additive improved stabilization of the colloid system of residue, which could delay th aggregation and coke formation from asphaltenes on the catalyst, and make heavy components transformed into light oi The residue conversion in the presence of this additive increased by 1.94%, and the yield of light oil increased by 1.53%when the reaction time was 90 min. The surface properties of the catalyst in the presence of this additive were better tha that of the blank test within a very short time(30 min) and deteriorated rapidly after a longer reaction time due to highe conversion and coke deposition. Compared with the blank test, the case using the said additive had shown that the structur of hydrotreated asphaltene units was smaller and the condensation degrees were higher. The test results indicated that th additive could improve the hydrotreating reactivity of residue via permeation and depolymerization, the heavier componen could be transformed into light oil more easily, and the light oil yield and residue conversion were higher for the case usin the said additive in residue hydrotreating process.

关键词： residue hydrotreating dodecylbenzene sulfonic acid product distribution catalyst properties asphaltenes structure

Effect of Intermolecular Interaction on Stability of Asphaltene-Hydrogen Donor System

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China Petroleum Processing & Petrochemical Technology 2022年第4期24卷 21-28页

作者： sun yudong Li Maolin Liu Ziyuan Xiao Shengyu College of Chemical Engineering China University of PetroleumQingdao 266580China

The stability of three asphaltene-hydrogen donor systems,namely asphaltene-1-methylnaphthalene,asphaltene-tetralin,and asphaltene-decalin,with a mass ratio of 1:10 was investigated using the Turbiscan stability *** interactions between hydrogen donor molecules and asphaltene units were simulated and calculated using Gaussian and Multiwfn,and then,noncovalent interaction analysis was *** results showed that the stability of the three asphaltene-hydrogen donor systems decreased as follows:asphaltene-1-methylnaphthalene>asphaltene-tetralin>*** stability differences among the three systems were due to the different interactions between the hydrogen donor molecules and the asphaltene *** T-stacking interaction strength between the hydrogen donor molecules and the asphaltene units decreased as follows:1-methylnaphthalene-asphaltene unit>tetralin-asphaltene unit>decalin-asphaltene *** analysis indicates that the T-stacking interactions between the hydrogen donor molecules and the asphaltene units were mainly van der Waals forces,and the proportions of hydrogen bonds in the weak interaction differed among the systems.

关键词： asphaltene-hydrogen donor system stability interaction gaussian NCI analysis

Analysis of Influence Factors for FCC Slurry Separation by Mixed Solvent Extraction

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China Petroleum Processing & Petrochemical Technology 2022年第1期24卷 111-116页

作者： sun yudong Zhao Xiaoning Liu Ziyuan Feng Yi Han Zhongxiang College of Chemical Engineering China University of Petroleum(East China)Qingdao 266580

Daqing FCC slurry was treated using mixed solvent containing N,N-dimethylformamide(extraction solvent)and n-paraffin(stripping-agent).The influence of solvent formulation(ratio of DMF/stripping-agent),temperature,time and solvent-oil ratio on yield and aromatics content of the extract oil were analyzed by a four-factor and three-level orthogonal experimental *** polynomial regression models between the extract oil yield and aromatics content with the four factors were *** surface analysis showed that solvent formulation,temperature and solvent-oil ratio have significant effects on extraction result and there is an interaction between temperature and solvent-oil ratio on aromatics content,when the FCC slurry is extracted by mixed ***,the extraction time has no significant *** optimal conditions for FCC slurry extraction covered:a solvent mixed ratio of 2.3,a temperature of 62.8℃,a solvent-oil ratio of 3.2,and a time of 35 *** result of verification experiment was in good agreement with the prediction of the model.

关键词： solvent formulation FCC slurry extraction response surface method extract oil yield aromatics content

Effects of Ultrasonic Treatment on Residue Properties

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China Petroleum Processing & Petrochemical Technology 2013年第4期15卷 14-19页

作者： sun yudong Zhang Qiang Shi Honghong Wang Xue Liu Bo State Key Laboratory of Heavy Oil Processing China University of Petroleum

The changes in properties and structural parameters of four vacuum residue samples before and after ultrasonic treatment were analyzed. Ultrasonic treatment could increase the carbon residue value, decrease the average molecular weight and viscosity, which can barely inlfuence the density of vacuum residue. Meanwhile the constitution of residue can be varied including the decrease in the content of saturates, aromatics and asphaltenes, while the increase in the content of resins can lead to an increase in the total content of asphaltenes and resins. Among the four kinds of residue samples, there is a common trend that the more the content of asphaltenes in feedstock is, the more the increase in the content of resins, the more signiifcant decrease in the aromatic content and the less decrease in the saturates content after ultrasonic treatment of residue would be. Changes in the structure and content of asphaltenes caused by ultrasonic treatment have a signiifcant impact on the changes in residue properties. Ultrasonic treatment has changed the structural parameters of residue such as decrease in the total carbon number of average molecule （CTotal）, the total number of rings （RT）, the aromatic carbon number （CA）,the aromatic rings number （RA） and the naphthenic rings number （RN） , and increase of characterization factor （KH）. The study has indicated that ultrasonic treatment of vacuum residue can change the average structure of residue, and the changes in the content and structure of asphaltenes are the main cause leading to property changes. The results of residue hydrotreat-ing revealed that coke yield decreased, whereas the gas and light oil yield and conversion increased after ultrasonic treat-ment of vacuum residue.

关键词： ultrasonic treatment residue asphaltene SARA fractions structure parameters

High-Throughput physiology-based stress response phenotyping:Advantages,applications and prospective in horticultural plants

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Horticultural Plant Journal 2021年第3期7卷 181-187页

作者： Yanwei Li Xinyi Wu Wenzhao Xu yudong sun Ying Wang Guojing Li Pei Xu Institute of Vegetables Zhejiang Academy of Agricultural SciencesHangzhou 310021China College of Life Sciences China Jiliang UniversityHangzhou 310018China Huaiyin Institute of Agricultural Sciences of Xuhuai Region in Jiangsu Jiangsu 223001China

Phenomics is a new branch of science that provides high-throughput quantification of plant and animal traits at systems *** last decade has witnessed great successes in high-throughput phenotyping of numerous morphological traits,yet major challenges still exist in precise phenotyping of physiological traits such as transpiration and *** to the highly dynamic nature of physiological traits in responses to the environment,appropriate selection criteria and efficient screening systems at the physiological level for abiotic stress tolerance have been largely absent in *** this review,the current status of phenomics techniques was briefly summarized in horticultural ***,the emerging field of high-throughput physiology-based phenotyping,which is referred to as“physiolomics”,for drought stress responseswas *** addition to analyzing the advantages of physiology-based phenotyping overmorphology-based approaches,recent examples that applied high-throughput physiological phenotyping to model and non-model horticultural plants were revisited and *** on the collective findings,we propose that high-throughput,non-destructive,and automatic physiological assays can and should be used as routine methods for phenotyping stress response traits in horticultural plants.

关键词： Phenomics Physiolomics Isohydric/anisohydric Abiotic stress

Additional far-red light promotes adventitious rooting of doubleroot-cutting grafted watermelon seedlings

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Horticultural Plant Journal 2024年第6期10卷 1424-1436页

作者： Xue Wu Xiaoyan Zhang Yaya Wang Cuinan Wu yudong sun Yi Zhang Yongran Ji Encai Bao Liru Xia Zhonghua Bian Kai Cao The Agriculture Ministry Key Laboratory of Agricultural Engineering in the Middle and Lower Reaches of Yangtze River Institute of Agricultural Facilities and EquipmentJiangsu Academy of Agricultural SciencesNanjingJiangsu 210014China Institute of Industrial Crops Jiangsu Academy of Agricultural SciencesNanjingJiangsu 210014China College of Horticulture Shanxi Agricultural UniversityTaiguShanxi 030801China Huaiyin Institute of Agricultural Science in Xuhuai District HuaianJiangsu 223001China Horticulture and Product Physiology Department of Plant SciencesWageningen University&ResearchWageningen 6700AAthe Netherlands Institute of Urban Agriculture Chinese Academy of Agricultural SciencesChengduSichuan 610299China

Root regeneration is an important factor influencing the healing rate of graft union and the survival of double-root-cutting *** date,little information is available on how to enhance root regeneration of rootstock in grafted watermelon(Citrullus lanatus)*** this study,the effects of different light treatments on root regeneration were *** revealed that addition of far-red light(Fr)could significantly expedite root formation in the ***,the results of transcriptome analysis revealed that plant hormone pathway and auxinrelated genes were greatly induced by Fr,especially for auxin-response proteins(including CmIAA11,CmIAA17,and CmAUX28),Small auxinup RNA genes(including CmSAUR20 and CmSAUR50)and the auxin efflux transporter(CmPIN3).In addition,the expression of Phytochrome Interacting Factor(PIFs),such as CmPIF1,CmPIF3 and CmPIF7,was remarkably increased by *** genes may act together to activate auxinrelated pathways under Fr *** on the results of HPLC-MS/MS analysis,the concentrations of different auxin-types in adventitious root were significantly influenced by ***,the better growth of rootstock root displayed superior vasculature transport activity of the graft union with Fr treatment,which was determined by the acid magenta dyeing ***,all the results suggested that Fr could induce AR formation in rootstocks,which may be associated with the auxin accumulation by regulating the transcriptional level of auxinrelated and PIF *** findings of this study demonstrated a practicable way to shorten the healing period of graftings and improve the quality of grafted watermelon seedlings,which will provide a theoretical basis for the speeding development of industrialized seedlings production.

关键词： Watermelon Double-root-cutting grafting Rootstock Adventitious root regeneration Auxin

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大陆俯冲带热结构的数值模拟

地球科学 2019年第12期44卷 3993-3997页

作者：冷伟孙郁东中国科学技术大学地球和空间科学学院地震与地球内部物理实验室

俯冲带热结构是控制俯冲板块演化的最主要因素之一.前人通过建立解析模型和数值模型对大洋俯冲带热结构进行了一系列研究,发现俯冲板块年龄和俯冲速度是影响俯冲带热结构的关键因素.为了认识大陆俯冲带热结构,特别是理解数值模型结果与... 详细信息

俯冲带热结构是控制俯冲板块演化的最主要因素之一.前人通过建立解析模型和数值模型对大洋俯冲带热结构进行了一系列研究,发现俯冲板块年龄和俯冲速度是影响俯冲带热结构的关键因素.为了认识大陆俯冲带热结构,特别是理解数值模型结果与岩石学结果之间的差异,我们建立了二维大陆俯冲带运动学和动力学数值模型研究其热结构演化.模型结果显示,如果大陆俯冲板块的俯冲速度与角度和大洋板块一致的话,较低的大陆俯冲带初始温度导致其板块温度比大洋俯冲带低.但是,当大陆俯冲板块的初始温度较高,俯冲速度超慢并且考虑大陆地壳中的放射性元素生热时,模型得到的大陆俯冲带热结构能够解释通过高压和超高压变质岩得到的较热的俯冲板块温度.另一方面,如果俯冲板块与上覆板块存在动力学解耦作用,也能够得到较热的俯冲温压数据.

关键词：俯冲带热结构大陆俯冲带数值模型地球动力学

A telomere-to-telomere gap-free reference genome of watermelon and its mutation library provide important resources for gene discovery and breeding

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Molecular Plant 2022年第8期15卷 1268-1284页

作者： Yun Deng Shoucheng Liu Yilin Zhang Jingsheng Tan Xiaopeng Li Xiao Chu Binghua Xu Yao Tian yudong sun Bosheng Li YunbiXu Xing Wang Deng Hang He Xingping Zhang Peking University Institute of Advanced Agricultural Sciences Shandong Laboratory of Advanced Agricultural Sciences at WeifangWeifangShandong 261000China School of Advanced Agricultural Sciences and School of Life Sciences State Key Laboratory of Protein and Plant Gene ResearchPeking UniversityBeijing 100871China Jiangsu Xuhuai Area Huaiyin Institute of Agricultural Science HuaianJiangsu 223300China

Watermelon,Citrullus lanatus,is the world's third largest fruit *** genomes with gaps and a narrow genetic base hinder functional genomics and genetic improvement of ***,we report the assembly of a telomere-to-telomere gap-free genome of the elite watermelon inbred line G42 by incorporating high-coverage and accurate long-read sequencing data with multiple assembly *** 11 chromosomes have been assembled into single-contig pseudomolecules without gaps,representing the highest completeness and assembly quality to *** G42 reference genome is 369321829 bp in length and contains 24205 predicted protein-coding genes,with all 22 telomeres and 11 centromeres ***,we established a pollen-EMS mutagenesis protocol and obtained over 200000M1 seeds from *** a sampling pool,48 monogenic phenotypic mutations,selected from 223M1and 78 M2 mutants with morphological changes,were *** average mutation density was 1 SNP/1.69Mband1 indel/4.55 Mb per M1 plant and 1SNP/1.08Mb and 1 indel/6.25 Mb per M2 *** advantage of the gap-free G42 genome,8039 mutations from 32 plants sampled from M1 and M2 families were identified with 100%accuracy,whereas only 25% of the randomly selected mutations identified using the 97103v2 reference genome could be *** this library and the gap-free genome,two genes responsible for elongated fruit shape and male sterility(CiMs1)were identified,both caused by a single basechange from G to *** validated gap-free genome and its EMS mutation library provide invaluable resources for functional genomics and genetic improvement of watermelon.

关键词： watermelon gap-free genome EMS,mutation library gene discovery genome-wide sequencing genic male sterility

One-step electrodeposition fabrication of Ni_3S_2 nanosheet arrays on Ni foam as an advanced electrode for asymmetric supercapacitors

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Science China Materials 2019年第5期62卷 699-710页

作者： Jiasheng Xu yudong sun Mingjun Lu Lin Wang Jie Zhang Xiaoyang Liu Liaoning Province Key Laboratory for Synthesis and Application of Functional Compounds College of Chemistry and Chemical EngineeringCenter of Experiment Management Bohai University State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of Chemistry Jilin University

Ni3S2 nanosheet(NS) arrays on Ni foam were fabricated by a simple one-step electrodeposition strategy, and used as a kind of electrode material for asymmetric supercapacitors. The Ni3S2 NS arrays are interconnected, which can be regarded as bridges between these individual nanoparticle units. The electrochemical performances were evaluated by cyclic voltammetry and chronopotentiometry techniques in a three-electrode system. The Ni3S2 NS arrays display a specific capacitance of 773.6 F g^-1 at 1 A g^-1, and excellent rate property of 84.3% at 10 A g^-1. The performance of the Ni3S2 NS arrays was further investigated in an asymmetric supercapacitor for potential practical application. The asymmetric supercapacitor using the Ni3S2 electrode and reduced graphene oxide electrode as positive and negative electrodes, respectively, exhibits an energy density of 41.2 W h kg^-1 at 1.6 kW kg^-1. When up to 16 kW kg^-1, it holds 25.3 W h kg^-*** excellent electrochemical performances are attributed to the improved electronic conductivity and rich redox reaction sites from Ni3S2 NS arrays. Our results indicate that the Ni3S2 NS arrays have great potential for supercapacitors.

关键词： nickel subsulfide electrodeposition nanosheet arrays asymmetric supercapac让ors