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Oxidation Kinetics,Structural Changes and Element Migration during Oxidation Process of Vanadium-titanium Magnetite Ore

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Journal of Iron and Steel Research International 2016年第11期23卷 1160-1167页

作者： Feng PAN Qing-shan zhu Zhan DU Hao-yan SUN State Key Laboratory of Multiphase Complex Systems Institute of Process EngineeringChinese Academy of Sciences(CAS)Beijing 100190China University of Chinese Academy of Sciences Beijing 100039China

The oxidation kinetics, structural changes, and elements migration during the oxidation process of the va- nadium-titanium magnetite （VTM） ore were analyzed. Kinetics analysis indicated that the oxidation process was con- trolled by diffusion control and could be divided into interface diffusion and lattice diffusion with apparent activation energy of 99.69 kJ/mol and 144.08 kJ/mol in the range of 800--1000℃, respectively. The surface structure changed with the oxidization temperature as follows： dense surface→nano sized sheets→submicron particles→molten particles. The compact structure changed into porous one because of the elements migration and enrichment. Both Fe and Ti elements migrated in the opposite direction during the oxidation process. The V etement in the raw ore stably existed in the form of V^5＋ state, some vanadium migrated and occupied the tetrahedral sites of the hematite during the oxidation process.

关键词： vanadium-titanium magnetite ore oxidation kinetics structural change element migration

Prediction of shanghai Stock Index Based on Investor Sentiment and CNN-LSTM Model

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Journal of Systems Science and Information 2022年第6期10卷 620-632页

作者： Yi SUN Qingsong SUN shan zhu School of Finance Anhui University of Finance&EconomicsBengbu 233030China Management College Ocean University of ChinaQingdao 266100China School of Business Hong Kong Baptist UniversityHong Kong 999077China

In view of the breakthrough progress of the depth learning method in image and other fields,this paper attempts to introduce the depth learning method into stock price forecasting to provide investors with reasonable investment *** paper proposes a stock prediction hybrid model named ISI-CNN-LSTM considering investor sentiment based on the combination of long short-term memory(LSTM) and convolutional neural network(CNN).The model adopts an end-to-end network structure,using LSTM to extract the temporal features in the data and CNN to mine the deep features in the data can effectively improve the prediction ability of the model by increasing investor sentiment in the network *** empirical part makes a comparative experimental analysis based on shanghai stock index in *** comparing the experimental prediction results and evaluation indicators,it verifies the prediction effectiveness and feasibility of ISI-CNN-LSTM network model.

关键词： convolution neural network long short-term memory investor sentiment stock price forecasting

Cloning and Sequence Analysis of the gp41 Gene of Clanis bilineata Nuclear Polyhedrosis Virus

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Agricultural Sciences in China 2006年第10期5卷 787-792页

作者： zhu shan-ying WANG Wen-bing zhu Jiang Institute of Life Sciences Jiangsu University Zhenjiang 212013 P.R.China College of Life Sciences Suzhou University Suzhou 215006 P.R.China

Clanis bilineata Nucleo Polyhedro Virus （CbNPV） was purified from Clanis bilineata larva. To obtain the molecular information of the virus, the genomic DNA of CbNPV was extracted, and a DNA fragment library of the virus was constructed using shotgun. The positive clones were then sequenced and analyzed. An open-reading frame （ORF） that has high identity with the gp41 gene of most NPVs was found in the library. The gp41 gene of CbNPV is 933 base pair long and encodes a protein of 310 amino acids. The result of the amino acid sequence analysis showed that the CbNPV gp41 has 53-61 and 56-73% identities with Group 1 and II NPVs gp41 proteins, respectively. The result indicates that the isolated CbNPV is a novel baculovirus, and the CbNPV shares a much closer relationship Ⅱ NPVs.

关键词： Clanis bilineata Nucleo Polyhedro Virus gp41 gene sequence analysis

Frontal Crash Analysis of a Fully Detailed Car Model Based on Finite Element Method

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上海交通大学学报 2004年第Z2期38卷 136-141页

作者： Han shan-Ling zhu Ping Lin Zhong-Qin Shi Yu-Liang School of Mechanical and Power Energy Engineering Shanghai Jiaotong University Shanghai200030 China School of Mechanical and Power Energy Engineering Shanghai Jiaotong University Shanghai200030 China School of Mechanical and Power Energy Engineering Shanghai Jiaotong University Shanghai200030 China School of Mechanical and Power Energy Engineering Shanghai Jiaotong University Shanghai200030 China

This paper sets up a highly detailed finite element model of a car for frontal crashworthiness applications, and then explains the characteristics of it. The geometry model is preprocessed by Hypermesh software. The finite element method solver program selected for the simulation is LS-DYNA. After the crash simulation is carefully analyzed, the frontal crash experiment is aimed to validate the finite element model. The simulation results are basically in agreement with the experimental results. The validation of the finite element model is crucial for the further research in optimization of the automotive structure or lightweighting of the vehicle.

关键词： finite element method frontal crash LS-DYNA

Unusual selective reactivity of the rare-earth metal complexes bearing a ligand with multiple functionalities

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Science China Chemistry 2023年第1期66卷 117-126页

作者： Dongjing Hong Thayalan Rajeshkumar shan zhu Zeming Huang Shuangliu Zhou Xiancui zhu Laurent Maron Shaowu Wang Key Laboratory of Functional Molecular Solids Ministry of EducationAnhui Laboratory of Molecule-Based MaterialsCollege of Chemistry and Materials ScienceAnhui Normal UniversityWuhu 241000China Anhui Laboratory of Clean Catalytic Engineering Anhui Laboratory of Functional Coordinated Complexes for Materials Chemistiry and ApplicationCollege of Chemical and Environmental EngineeringAnhui Polytechnic UniversityWuhu 241000China LPCNO CNRS&INSAUniversite Paul Sabatier 135 Avenue de Rangueil31077 ToulouseFrance

Ligands play a key role in controlling activity of organometallic complexes so that development of new ligands to overcome the challenge is the main topic of modern *** first example of 1,1-hydride migratory insertion and intramolecular redox reaction has been realized in this work by applying a new ligand in rare-earth metal *** novel rare-earth metal complexes L^(Mes)RECH2TMS(THF)(RE=Y(1a),Dy(1b),Er(1c),Yb(1d),L^(Mes)=1-(3-(2,6-iPr_(2)C_(6)H_(3)N=CH)C8H4N)-CH_(2)CH_(2)-3-(2-CH2–4,6-Me_(2)C_(6)H_(2))-(N(CH)_(2)NC),THF=tetrahydrofuran)bearing a ligand with imino,indolyl,NHC(N-heterocyclic carbene)multiple functionalities were synthesized and *** of complexes 1 with silanes(PhSiH3or PhSiH2Me or PhSiD3)selectively produced the unprecedented 1,1-hydride(or deuterated H)migratory insertion of the indolyl moiety of the novel unsymmetrical dinuclear rare-earth metal complexes *** complex 2a reacts with Ph_(2)C=O to give the selective C=O double bond insertion to the RE–Co-methylene-Mesbond product 3a which further reacts with another Ph_(2)C=O(or DMAP,4-N,N-dimethylaminopyridine)affording the novelμ-η^(2):η^(3)-dianionic 3-iminoindolyl dinuclear rare-earth metal complex *** latter is formed through an unusual intramolecular redox reaction(through electron migration from the 2-carbanion of the indolyl ring to the imino motif)resulting in the re-aromatization of the indolyl ring.

关键词： rare-earth metal complexes indole N-heterocyclic carbene Fischer-type carbene 1 1-migratory insertion dianionic 3-iminoindolyl

Distribution of fatty acids in the alpine grassland soils of the Qinghai-Tibetan Plateau

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Science China Earth Sciences 2016年第7期59卷 1329-1338页

作者： DAI Guo Hua zhu shan shan LIU Zong Guang CHEN Li Tong HE Jin Sheng FENG Xiao Juan State Key Laboratory of Vegetation and Environmental Change Institute of Botany Chinese Academy of Sciences Key Laboratory of Adaptation and Evolution of Plateau Biota Northwest Institute of Plateau Biology Chinese Academy of Sciences Department of Ecology College of Urban and Environmental Sciences Peking University

As an important biomarker, fatty acids(FAs) have been extensively used to trace the origin of organic matter in sediments and soils. However, studies of the distribution and abundance of FAs in alpine grassland soils are still rare, especially on the Qinghai-Tibetan Plateau(QTP), the highest plateau in the world, which contributes sediments to many large rivers in Asia. This study investigates the composition, distribution and source of FAs with increasing soil depths from 17 typical alpine grassland sites in the QTP. The most abundant FAs included the ubiquitous C16 FA and even-numbered long-chain FAs(C20–C30), indicating mixed inputs from microbial and higher plant sources. Source apportionment showed that higher plants were the dominant contributor of FAs(approximately 40%) in QTP soils. The abundance of FAs decreased with soil depth, with the highest value(1.08±0.09 mg/g C) at a 0–10 cm depth and the lowest value(0.46±0.12 mg/g C) at a 50–70 cm depth, due to much lower plant inputs into the deeper horizons. The total concentration of FAs was negatively correlated to the mean annual temperature(MAT; P<0.05) and soil p H(P<0.01), suggesting that the preservation of FAs was favored in low-MAT and low-p H soils on the QTP. The abundance of fresh C source FAs increased significantly with the mean annual precipitation(MAP; P<0.05), indicating that high MAP facilitates the accumulation of fresh FAs in QTP soils. Other environmental parameters, such as the soil mineral content(aluminum and iron oxide), microbial community composition as well as litter quality and quantity, may also exert a strong control on the preservation of FAs in QTP soils and warrant further research to better understand the mechanisms responsible for the preservation of FAs in QTP soils.

关键词： Qinghai-Tibetan Plateau Soil organic matter Biomarker Fatty acids Distribution sources

Giant solitary fibrous tumor arising from greater omentum

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World Journal of Gastroenterology 2012年第44期18卷 6515-6520页

作者： Liang Zong Ping Chen Guang-Yao Wang Qun-shan zhu Department of Gastrointestinal Surgery Subei People's HospitalYangzhou UniversityYangzhou 225001Jiangsu ProvinceChina

Extrathoracic solitary fibrous tumors(SFTs) have been described at almost every anatomic location of human body,but reports of SFT in the abdominal cavity are *** herein present a rare case of SFT originating from greater *** tomography revealed a 15.8 cm × 21.0 cm solid mass located at superior aspect of *** laparotomy confirmed its mesenchymal ***,its tissue was composed of non-organized and spindle-shaped cells exhibiting atypical nuclei,which were divided up by branching vessel and collagen *** staining showed that this tumor was negative for CD117,CD99,CD68,cytokeratin,calretinin,desmin,epithelial membrane antigen,F8 and S-100,but positive for CD34,bcl-2,α-smooth muscle actin and *** patient presented no evidence of recurrence during *** arising from abdominal cavity can be diagnosed by histological findings and immunohistochemical markers,especially for CD34 and bcl-2 positive cases.

关键词： Greater omentum Solitary fibrous tumor Immunohistochemical markers

CRYSTALLIZATION SEGREGATION DSC STUDIES OF PP/PE COPOLYMERS

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Chinese Journal of Polymer Science 2001年第1期19卷 93-96页

作者： Yu Ma Ying Wang shan-nong zhu Mao Xu State Key Laboratory of Polymer Physics and Chemistry Center for Molecular Science Institute of ChemistryChinese Academy of SciencesBeijing 100080China

The structural analysis of two PP/PE copolymer samples,1 and 2,was conducted by using^(13)C-NMR,GPC and crystallization segregation DSC(CSDSC)techniques.A pure polypropylene sample was also used for *** was found that the two copolymer samples are very close in composition(the ethylene mol content is 4.3%and 4.5%,respectively),stereoregularity(96%and 97%)and molecular weight(M_(w)=7.0 x 10^(4)and 7.3 x 10^(4);M-(w)/M_(n)=5.0 and 6.1,respectively).While the CSDSC thermograms of the two samples are quite different from each *** 1 shows a higher average melting temperature and a broader distribution of its thermogram These phenomena were explained as an indication of a less uniform distribution of ethylene units along the PP chains for sample *** was noted that CSDSC is a very sensitive and convenient technique for structural studies of copolymers.

关键词： PP/PE copolymer sequence distribution crystallization segregation DSC ^(13)C-NMR

Synthesis of porous aromatic framework with Friedel–Crafts alkylation reaction for CO_2 separation

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Chinese Chemical Letters 2016年第9期27卷 1479-1484页

作者： Peng Cui Xiao-Fei Jing Ye Yuan Guang-shan zhu Key Laboratory of Polyoxometalate Science of Ministry of Education Department of Chemistry Northeast Normal University

A novel porous aromatic framework, PAF-8, derived from tetraphenylsilane as basic building unit, was successfully synthesized via Friedel-Crafts alkylation reaction. This PAF material had high thermal stability as well as high surface area （785 m^2 g^-1） calculated from the Brunauer-Emmett-Teller （BET） model. Meanwhile, PAF-8 possessed high performances in gas sorption and especially for CO2 separation.

关键词： Porous aromatic frameworks Friedel-Crafts alkylation Gas sorption CO2 separation Liquid vapor adsorption