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B-COpNA resin formation from ethylene tar light fractions:process development and mechanical exploration by molecular simulation

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Chinese Journal of Chemical Engineering 2024年第6期70卷 118-129页

作者： Hongyan Shen Lingrui Cui Xingguo Wei Yuanqin Zhang Lian Cen Jun Xu Fahai Cao Engineering research Center of Large Scale reactor East China University of Science and TechnologyShanghai 200237China

An efficient utilization strategy of ethylene tar(ET),the main by-product of the ethylene cracking unit,is urgently required to meet demands for modern petrochemical *** the other hand,condensed polynuclear aromatic resin of moderate condensation degree(B-COpNA)is a widely used carbon material due to its superb processability,the production of which is,however,seriously limited by the high cost of raw *** such context,an interesting strategy was proposed in this study for producing B-COpNA resin using crosslinked light fractions of ethylene tar(ETLF,boiling pointr simulation.1,4-Benzenedimethanol(pXG)was first selected as the crosslinking agent according to the findings of molecular *** effects of operating conditions,including reactions temperature,crosslinking agent,and catalyst content on the softening point and yield of B-COpNA resin products were then investigated to optimize the *** reaction mechanism of resin production was studied by analyzing the molecular structure and transition state of ETLF and crosslinking *** was shown that pXG exhibited a superior capacity of withdrawing electrons and a higher electrophilic reactivity than other crosslinking *** addition to the highest yield and greatest heat properties,pXG-prepared resin contained the most condensed *** corresponding optimized conditions of resin preparation were 180℃,1:1.9(pXG:ETLF),and 3%(mass)of catalyst content with a resin yield of 78.57%.It was the electrophilic substitution reaction that occurred between the ETLF and crosslinking agent molecules that were responsible for the resin formation,according to the experimental characterization and molecular ***,it was confirmed that the proposed strategy and demonstrated process can achieve a clean and high value-added utilization of ETLF via B-COpNA resin preparation,bringing huge economic value to the current petrochemical industry.

关键词： Ethylene tar Crosslinking COpNA resin Molecular simulation Transient state

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Influence of scanning velocity on femtosecond laser direct writing lines on FOTUrAN glass

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Chinese Optics Letters 2008年第1期6卷 51-53页

作者：巫殷忠王清月贾威倪晓昌胡明列柴路 Ultrafast Laser Laboratory School of Precision Instruments and Optoeletronics Engineering Key Laboratory of Optoelectronic Information Technical ScienceMinistry of EducationTianjin University Electronic Engineering Department Tianjin University of Technology and Education

Lines are induced on the surface of a photosensitive （FOTUrAN） glass by focused femtosecond laser transverse writing with scanning velocity in a wide range of 40-1800 μm/s. The formed lines are analyzed using scanning electron microscope （SEM） and optical microscope （OM）. It is observed that three distinct morphologies of lines are produced depending on the scanning velocity. Lines written in low velocity level （40 - 100 μm/s） and high velocity level （1000 - 1800 μm/s） are uniform and regular, while those written in moderate velocity level （150 - 600 μm/s） are rough. The influence of scanning velocity is explained based on different pulses overlapping or cumulative dose of laser exposure in irradiated area. Fabrication of shallow groove on the surface is also demonstrated.

关键词： Morphology Optical microscopy photosensitive glass Scanning electron microscopy

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SHS Flame Spraying TiC-TiB_(2) Multiphase Coatings

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材料热处理学报 2004年第05B期25卷 981-983页

作者： WANGJian-jiang DUXin-kang LUDa-qin YEMing-hui ZHANGLong AdvancedMaterialInstitute MechanicalEngineeringCollegeShijiazhuangChina MaterialsscienceandEngineeringCollege Xi＇anJiaotongUniversityXi＇anChina／／ AdvancedMaterialInstituteMechanicalEngineeringCollegeShijiazhuangChina AdvancedMaterialInstitute MechanicalEngineeringCollegeShijiazhuangChina／／CenterofPhysicsandChemistryBeihangUniversityBeijingChina

Utilizing SHS reactive Flame Spraying (rFS) technology, TiC-TiB2-Al2O3 multiphase ceramics coatings were produced on steel substrate. phase constituents and microstructure of the ceramic coatings were analyzed. The procedure of chemical combustion and structure transformation, reactive mechanism, and solidifying behavior during spaying were emphasized. reactants which influenced on SHS spraying was discussed. SHS reactive spraying processes were studied. Mechanical properties of the coatings were tested.

关键词： SHS 火焰喷镀 TiC-TiB2 多相涂层

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Transcriptome-wide identification and expression profiling of pinus massoniana MYB transcription factors responding to phosphorus deficiency

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Journal of Forestry research 2020年第3期31卷 909-919页

作者： Fuhua Fan Qingzhu Wang Xiaopeng Wen Guijie Ding Institute for Forest resources and Environment of Guizhou Guizhou UniversityGuiyang 550025China College of Forestry Guizhou UniversityGuiyang 550025China Institute of Agro-Bioengineering Guizhou UniversityGuiyang 550025China

Myeloblastosis(MYB) proteins constitute one of the largest transcription factor(TF) families in plants and play crucial roles in regulating plant physiological and biochemical processes, including adaptation to diverse abiotic stresses. These TF families contain highly conserved MYB repeats(1 r, r2 r3, 3 r and 4 r) at the N-terminus. roles for MYB TFs have been reported in response to such stresses as dehydration, salt, cold, and drought. The characterization of Masson pine(pinus massoniana) MYB TFs are reported, including the analysis of MYB TFs expression in seedlings under controlled conditions and two different phosphate(pi) deficient treatments. By searching for conserved MYB motifs in full transcriptomic rNA sequencing data for p. massoniana, 59 sequences were identified as MYB TFs. Conserved domainstructures and comparative functional and phylogenetic relationships of these MYB TFs with those in Arabidopsis were assessed using various bioinformatics tools. Based on microarray analysis, p. massoniana MYB genes exhibited different expression patterns under the two pi deficiency conditions. Genes encoding MYB TFs that showed increased expression under critical pi deficiency were identified, and some MYBs were differentially expressed only under conditions of severe pi starvation. These results are useful for the functional characterization of MYB TFs that may be involved in the response to pi deficiency and play divergent roles in plants.

关键词： MYB transcription factors Transcriptome pinus massoniana phosphorus deficiency Microarray analysis

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On the Birch-Swinnerton-Dyer Conjecture of Elliptic Curves E_D:y^2=x^3-D^2x

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Acta Mathematica Sinica,English Series 2000年第2期16卷 229-236页

作者： Delang Li Department of Mathematics,Sichuan Union University,Chengdu 610064,p.r.china Ye Tian Department of Mathematics,Columbia University,New York,NY 10027,USA Department of Mathematics Sichuan Union University Chengdu 610064 P. R. China Department of Mathematics Columbia University New York NY 10027 USA

We prove in this paper that the BSD conjecture holds for a certain kind of elliptic curves.

关键词： Elliptic curve BSD conjecture Graph 2-component

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Modeling and Identification of Multirate Systems

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自动化学报 2005年第1期31卷 105-122页

作者： FengDING TongwenCHEN DepartmentofElectricalandComputerEngineeringUniversityofAlberta EdmontonAlbertaT6G2V4Canada

Multirate systems are abundant in industry; for example, many soft-sensor design problems are related to modeling, parameter identification, or state estimation involving multirate systems. The study of multirate systems goes back to the early 1950's, and has become an active research area in systems and control. This paper briefly surveys the history of development in the area of multirate systems, and introduces some basic concepts and latest results on multirate systems, including a polynomial transformation technique and the lifting technique as tools for handling multirate systems, lifted state space models, parameter identification of dual-rate systems, how to determine fast single-rate models from dual-rate models and directly from dual-rate data, and a hierarchical identification method for general multirate systems. Finally, some further research topics for multirate systems are given.

关键词：多速率系统识别法模型化双重速率系统参数估计系统显示分层识别

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Variational Analysis Based on proximal Subdifferential on Smooth Banach Spaces

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Acta Mathematica Sinica,English Series 2024年第2期40卷 595-618页

作者： Xi Yin ZHENG Department of Mathematics Yunnan UniversityKunming 650091P.R.China

This paper first shows that for any p∈(1,2)there exists a continuously differentiable function f on l^(p)(and L^(p))such that the proximal subdifferential of f is empty everywhere,and hence it is not suitable to develop theory on proximal subdifferential in the classical Banach spaces l^(p)and L^(p) with p∈(1,2).On the other hand,this paper establishes variational analysis based on the proximal subdifferential in the framework of smooth Banach spaces of power type 2,which conclude all Hilbert spaces and all the classical spaces l^(p)and L^(p)with p∈(2,+∞).In particular,in such a smooth space,we provide the proximal subdifferential rules for sum functions,product functions,composite functions and supremum functions,which extend the basic results on the proximal subdifferential established in the framework of Hilbert *** of our main results are new even in the Hilbert space *** applications,we provide KKT-like conditions for nonsmooth optimization problems in terms of proximal subdifferential.

关键词： Smooth Banach space proximal subdifferential proximal normal cone KKT condition

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不确定中立型系统的改进的时滞依赖的鲁棒镇定(英文)

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系统仿真学报 2007年第17期19卷 4037-4041页

作者：李明胡广大哈尔滨工业大学控制理论与制导技术研究中心哈尔滨150001

研究了具有时不变不确定性的中立型系统的鲁棒镇定/稳定问题。给出了新的镇定/稳定法则。利用改进的Lyapunov泛函,得到了这类系统基于线性矩阵不等式的保守性较低的镇定/稳定条件。最后,用几个例子证明了本文所得到的结果要比现存的结... 详细信息

研究了具有时不变不确定性的中立型系统的鲁棒镇定/稳定问题。给出了新的镇定/稳定法则。利用改进的Lyapunov泛函,得到了这类系统基于线性矩阵不等式的保守性较低的镇定/稳定条件。最后,用几个例子证明了本文所得到的结果要比现存的结果得到了提高。

关键词：时滞依赖准则鲁棒镇定/稳定线性矩阵不等式中立型延时系统状态反馈镇定时不变不确定性.

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Texture Evolution Induced by Deformation in Aluminum Alloy

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上海交通大学学报 2004年第z2期38卷 206-211页

作者： Zhao Yixi Lin zhongqin Li shuhui Yu zhongqi School of Mechanical Engineering Shanghai Jiaotong Univ. Shanghai200030 China School of Mechanical Engineering Shanghai Jiaotong Univ. Shanghai200030 China School of Mechanical Engineering Shanghai Jiaotong Univ. Shanghai200030 China School of Mechanical Engineering Shanghai Jiaotong Univ. Shanghai200030 China

The lower formability of aluminum alloy sheets is the inherent characteristic of the material. During material forming processes the material undergoes a complex strain history. In this paper, the effect of crystallographic texture induced by deformation in aluminum sheet is studied. The transformation of crystallographic textures induced by uniaxial tensile, cup drawing and bulge tests was measured through X-ray diffraction and analyzed. The author studied the texture evolution rule under different strain paths. A qualitative relationship between the deformation and texture evolution has been founded.

关键词： texture evolution aluminum alloy deformation strain path

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regulation of bone phosphorus retention and bone development possibly by related hormones and local bone-derived regulators in broiler chicks

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Journal of Animal science and Biotechnology 2022年第1期13卷 224-239页

作者： Sumei Cao Tingting Li Yuxin Shao Liyang Zhang Lin Lu rijun Zhang Shuisheng Hou Xugang Luo Xiudong Liao Mineral Nutrition research Division State Key Laboratory of Animal NutritionInstitute of Animal ScienceChinese Academy of Agricultural SciencesBeijing 100193People’s Republic of China poultry Mineral Nutrition Laboratory College of Animal Science and TechnologyYangzhou UniversityYangzhou 225000People’s Republic of China Laboratory of Feed Biotechnology State Key Laboratory of Animal NutritionCollege of Animal Science and TechnologyChina Agricultural UniversityBeijing 100193People’s Republic of China

Background:phosphorus is essential for bone mineralization in broilers,however,the underlying mechanisms remain *** aimed to investigate whether bone phosphorus retention and bone development might be regulated by related hormones and local bone-derived regulators in ***:Broilers were fed diets containing different levels of non-phytate phosphorus(Npp)0.15%,0.25%,0.35%,0.45% and 0.55% or 0.15%,0.22%,0.29%,0.36% and 0.43% from 1 to 21 or 22 to 42 days of *** and tibia samples were collected for determinations of bone phosphorus retention and bone development parameters,related hormones and local bone-derived regulators of broiler chickens on d 14,28 and 42,***:Tibia ash phosphorus,total phosphorus accumulation in tibia ash(Tp_(TA)),bone mineral concentration(BMC),bone mineral density(BMD),bone breaking strength(BBS),and ash on d 14,28 or 42,serum 1,25-dihydroxyvitamin D_(3)(1,25(OH)_(2)D_(3))on d 28 and 42,mrNA expressions of tibia fibroblast growth factor 23(FGF23)and dentin matrix protein 1(DMp1)on d 14 and 28 increased linearly or quadratically(prum parathyroid hormone(pTH)on d 28,tibia alkaline phosphatase(ALp)on d 14,28 and 42,bone gal protein(BGp)on d 14,and mrNA expression of tibia phosphate-regulating gene with homologies to endopeptidases on the X chromosome(pHEX)on d 14 and 28 decreased linearly or quadratically(pry Npp level ***,BMC,BMD,and ash on d 28 and 42,BBS on d 28,and ash phosphorus on d 42 were positively correlated(r=0.389 to 0.486,prum 1,25(OH)_(2)D_(3).All of the above parameters were positively correlated(r=0.380 to 0.689,pp1 mrNA expression on d 14,28 and 42,but negatively correlated(r=−0.609 to−0.538,prum pTH on d 28,tibia ALp on d 14,28 and 42,and BGp on d ***_(TA),BMC and ash on d 14 and BMD on d 28 were negatively correlated(r=−0.397 to−0.362,ppHEX mrNA expression,and BMD on d 28 was positively

关键词： Bone Broiler chicken Hormone Local bone-derived regulator phosphorus

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