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Research and Development of Novel Heavy Oil Catalytic Cracking Catalyst RCC-1

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China Petroleum Processing & Petrochemical Technology 2014年第4期16卷 7-11页

作者： Zhang Jiexiao Zhou Yan Xu Yun tian Huiping SINOPEC Research Institute of Petroleum Processing SINOPEC Catalyst Company Qilu Division

A novel heavy oil catalytic cracking catalyst RCC-1 was developed by using the ultra-stable zeolite, which was hydrothermally treated and modified through cleaning its pores to serve as the active component. The chemical composition and physicochemical properties of RCC-1 catalyst were studied by XRF, BET, pore volume analysis, attrition index analysis, and particle size distribution determination methods, and its catalytic cracking performance was also evaluated by a microreactor for light oil cracking and the ACE device. The test results showed that the new type of heavy oil catalytic cracking catalyst RCC-1 had good physicochemical properties and heavy oil cracking ability, strong anti-metallic contamination capability, good product distribution, good coke selectivity and gasoline selectivity, and excellent reduction of gasoline olefin content characteristics.

关键词： heavy oil, catalytic cracking catalyst, activity, stability

Aerodynamic design on high-speed trains

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Acta Mechanica Sinica 2016年第2期32卷 215-232页

作者： San-San Ding Qiang Li Ai-Qin tian Jian Du Jia-Li Liu School of Mechanical Electronic and Control EngineeringBeijing Jiaotong University CSR Qingdao Sifang Locomotive & Rolling Stock Co. Ltd.

Compared with the traditional train,the operational speed of the high-speed train has largely improved,and thedynamicenvironmentofthetrainhaschangedfromoneof mechanical domination to one of aerodynamic *** aerodynamic problem has become the key technological challenge of high-speed trains and significantl affects the economy,environment,safety,and *** this paper,the relationships among the aerodynamic design principle,aerodynamic performance indexes,and design variables are firs studied,and the research methods of train aerodynamics are proposed,including numerical simulation,a reducedscale test,and a full-scale *** schemes of train aerodynamics involve the optimization design of the streamlined head and the smooth design of the body *** design of the streamlined head includes conception design,project design,numerical simulation,and a reduced-scale *** design of the body surface is mainly used for the key parts,such as electric-current collecting system,wheel truck compartment,and *** aerodynamic design method established in this paper has been successfully applied to various high-speed trains（CRH380A,CRH380 AM,CRH6,CRH2 G,and the Standard electric multiple unit（EMU）） that have met expected design *** research results can provide an effective guideline for the aerodynamic design of high-speed trains.

关键词： High-speed train Aerodynamic design Optimization design Smooth design

Multicolor photometry of the nearby galaxy cluster A119

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Research in Astronomy and Astrophysics 2012年第10期12卷 1381-1401页

作者： Jin-Tao tian Qi-Rong Yuan Xu Zhou Zhao-Ji Jiang Jun Ma Jiang-Hua Wu Zhen-Yu Wu tian-Meng Zhang Hu Zou National Astronomical Observatories Chinese Academy of Sciences Beiiing 100012 China Graduate University of Chinese Academy of Sciences Beijing 100049 China Key Laboratory of Optical Astronomy National Astronomical Observatories Chinese Academyof Sciences Beijing 100012 China Department of Physics Nanjing Normal University Nanjing 210046 China Department of Astronomy Beijing Normal University Beijing 100875 China

This paper presents multicolor optical photometry of the nearby galaxy cluster Abell 119 （z = 0.0442） with the Beijing-Arizona-Taiwan-Connecticut system of 15 intermediate bands. Within the BATC field of view of 58＇× 58＇, there are 368 galaxies with known spectroscopic redshifts, including 238 member galaxies （called sample I）. Based on the spectral energy distributions of 1376 galaxies brighter than iBATC ---- 19.5, the photometric redshift technique and the color-magnitude relation of early-type galaxies are applied to select faint member galaxies. As a result, 117 faint galaxies were selected as new member galaxies. Combined with sample I, an enlarged sample （called sample II） of 355 member galaxies is obtained. Spatial distribution and localized velocity structure for two samples demonstrate that A119 is a dynami- cally complex cluster with at least three prominent substructures in the central region within 1 Mpc. A large velocity dispersion for the central clump indicates a merging along the line of sight. No significant evidence for morphology or luminosity segrega- tions is found in either sample. With the PEGASE evolutionary synthesis model, the environmental effect on the properties of star formation is confirmed. Faint galaxies in the low-density region tend to have longer time scales of star formation, smaller mean stellar ages, and lower metallicities in their interstellar medium, which is in agreement with the context of the hierarchical cosmological scenario.

关键词： galaxies: clusters: individual (A119)- galaxies: distances and redshifts-- galaxies: evolution-- galaxies: kinematics and dynamics-- methods: data analysis

Multi-Task Learning for Alzheimer's Disease Diagnosis and Mini-Mental State Examination Score Prediction

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BIG DATA MINING AND ANALYTICS 2024年第3期7卷 828-842页

作者： Liu, Jin tian, Xu Lin, Hanhe Li, Hong-Dong Pan, Yi Cent South Univ Sch Comp Sci & Engn Hunan Prov Key Lab Bioinformat Changsha 410083 Peoples R China Xinjiang Univ Xinjiang Engn Res Ctr Big Data & Intelligent Softw Sch Software Urumqi 830091 Peoples R China Univ Dundee Sch Sci & Engn Dundee DD1 4HN Scotland Chinese Acad Sci Shenzhen Inst Adv Technol Fac Comp Sci & Control Engn Shenzhen 518055 Peoples R China

Accurately diagnosing Alzheimer's disease is essential for improving elderly health. Meanwhile, accurate prediction of the mini-mental state examination score also can measure cognition impairment and track the progression of Alzheimer's disease. However, most of the existing methods perform Alzheimer's disease diagnosis and mini-mental state examination score prediction separately and ignore the relation between these two tasks. To address this challenging problem, we propose a novel multi-task learning method, which uses feature interaction to explore the relationship between Alzheimer's disease diagnosis and minimental state examination score prediction. In our proposed method, features from each task branch are firstly decoupled into candidate and non-candidate parts for interaction. Then, we propose feature sharing module to obtain shared features from candidate features and return shared features to task branches, which can promote the learning of each task. We validate the effectiveness of our proposed method on multiple datasets. In Alzheimer's disease neuroimaging initiative 1 dataset, the accuracy in diagnosis task and the root mean squared error in prediction task of our proposed method is 87.86% and 2.5, respectively. Experimental results show that our proposed method outperforms most state-of-the-art methods. Our proposed method enables accurate Alzheimer's disease diagnosis and mini-mental state examination score prediction. Therefore, it can be used as a reference for the clinical diagnosis of Alzheimer's disease, and can also help doctors and patients track disease progression in a timely manner.

关键词： multi-task learning Alzheimer's disease diagnosis mini-mental state examination score prediction

A Simplified Seed Transformation Method for Obtaining Transgenic Brassica napus Plants

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Agricultural Sciences in China 2009年第6期8卷 658-663页

作者： SONG Li ZHAO De-gang WU Yong-jun tian Xiao-e Guizhou Key Laboratory of Agricultural Bioengineering Guizhou University Guiyang 550025 P.R.China Key Laboratory of Green Pesticide and Agricultural Biological Engineering Ministry of Education/Guizhou University Guiyang 550025 P.R. China College of Life Sciences Guizhou University Guiyang 550025 P.R.China

We report here a seed transformation of sonication-assisted, no-tissue culture to rapidly produce transgenic Brassica napus plants. This method comprises the steps of treating seeds by ultrasonic wave, inoculating Agrobacterium tumefaciens with a recombinant ChlFN-ct gene and germinating directly of treatment seed on wet filter papers. The obtained transformants were verified by GUS histochemical assay and nested PCR amplification. It suggests that seed transformation has a potential use in genetic transformation of rape.

关键词： Brassica napus seed transformation sonication

Effects and mechanisms of fluorite on the co-reduction of blast furnace dust and seaside titanomagnetite

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International Journal of Minerals,Metallurgy and Materials 2017年第11期24卷 1201-1210页

作者： tian-yang Hu Ti-chang Sun Jue Kou Chao Geng Yong-qiang Zhao School of Civil and Resources Engineering University of Science and Technology Beijing Beijing 100083 China Key Laboratory of Ministry of Education of China for Efficient Mining and Safety of Metal Mines Beijing 100083 China

The co-reduction roasting and grinding-magnetic separation of seaside titanomagnetite and blast furnace dust was investigated with and without fluorite addition at a reduction roasting temperature of 1250°C for 60 min, a grinding fineness of-43 μm accounting for 69.02 wt% of the total, and a low-intensity magnetic field strength of 151 kA/m. The mineral composition, microstructure, and state of the roasted products were analyzed, and the concentrations of CO and CO_2 were analyzed in the co-reduction roasting. Better results were achieved with a small fluorite dosage(≤4 wt%) in the process of co-reduction. In addition, F^- was found to reduce the melting point and viscosity of the slag phase because of the high content of aluminate and silicate minerals in the blast furnace dust. The low moisture content of the blast furnace dust and calcic minerals inhibited the hydrolysis of CaF_2 and the loss of F^-. Compared with the blast furnace dust from Chengdeng, the blast furnace dusts from Jiugang and Jinxin inhibited the diffusion of F-when used as reducing agents, leading to weaker effects of fluorite.

关键词： seaside titanomagnetite blast furnace dust co-reduction roasting fluorite mechanisms

Advances in identification and application of tumor antigen inducing anti-cancer responses

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Chinese Science Bulletin 2003年第11期48卷 1051-1054页

作者： XIE Ke tian Ling DENG Hongxin WEI Yuquan Key Laboratory of Biotherapy of Human Diseases of Ministry of Education of China and Cancer Center for West China Hospital West China Medical School Sichuan UniversityKey Laboratory of Biotherapy of Human Diseases of Ministry of Education of China and Cancer Center for West China Hospital West China Medical School Sichuan UniversityKey Laboratory of Biotherapy of Human Diseases of Ministry of Education of China and Cancer Center for West China Hospital West China Medical School Sichuan UniversityKey Laboratory of Biotherapy of Human Diseases of Ministry of Education of China and Cancer Center for West China Hospital West China Medical School Sichuan University Chengdu 610041 ChinaChengdu 610041 ChinaChengdu 610041 ChinaChengdu 610041 China

Discusses technologies for the identification and application of tumor antigens for cancer vaccines. Classification of tumor antigens; Cancer immunotherapy; Human tumor antigens recognized by T cells.

关键词：肿瘤免疫疗法癌细胞抗原鉴别分类抗癌癌症诊断癌症治疗

Regional immunity in tissue homeostasis and diseases

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Science China(Life Sciences) 2016年第12期59卷 1205-1209页

作者： Zhigang tian Xuetao Cao Yongyan Chen Qunyan Lyu Institute of Immunology and The CAS Key Laboratory of Innate Immunity and Chronic Disease School of Life Sciences and Medical Center University of Science & Technology of China Hefei 230027 China National Key Laboratory of Medical Immunology & Institute of Immunology Second Military Medical University Shanghai 200433 China Department of Health Sciences National Natural Science Foundation of China Beijing 100085 China

The immune system functions in the organ/tissue of the body. The immune cell differentiation and function are influenced by the organ/tissue microenvironments in which they reside, and the interaction of immune cells with the organ/tissue microenvironments may affect and even determine the outcome of the immune responses （Hu and Pasare, 2013; Zajac and Harrington, 2014）.

关键词： Ga

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功能性近红外光谱技术研究的可视化分析

中国组织工程研究 2025年第22期29卷 4832-4840页

作者：翟艺凡李红霞田水承程启威甄欣悦西安科技大学管理学院陕西省西安市710699 西安科技大学安全科学与工程学院陕西省西安市710699 西安科技大学材料科学与工程学院陕西省西安市710699

背景:近年来,功能性近红外光谱技术因便携性、低成本、非侵入性和高时间分辨率的特点,在认知神经科学、临床医学和工程技术等领域展现出广泛的研究意义和应用潜力。目的:分析近10年来功能性近红外光谱技术的研究进展、热点问题及前沿趋... 详细信息

背景:近年来,功能性近红外光谱技术因便携性、低成本、非侵入性和高时间分辨率的特点,在认知神经科学、临床医学和工程技术等领域展现出广泛的研究意义和应用潜力。目的:分析近10年来功能性近红外光谱技术的研究进展、热点问题及前沿趋势。方法:在Web of Science数据库中检索2013-01-01/2023-11-30发表的功能性近红外光谱技术相关文献,运用CiteSpace和VOSviewer软件对发文统计量、期刊、国家、机构、作者和关键词进行可视化分析。结果与结论:共纳入2 714篇文献进行研究,近10年有关功能性近红外光谱技术的文献总量整体呈上升趋势。选择的2 714篇文献,来自68个国家2 400个机构的9 171名作者,共发表在495种期刊上,美国和英国伦敦大学是代表性的国家和机构,Ehlis和Fallgatter是该研究领域具有影响力的2位作者,《神经影像》期刊以高引用率位居首位。功能性近红外光谱技术研究主要来自英国伦敦大学、中国北京师范大学和德国图宾根大学。使用VOSviewer 1.6.20生成的关键词共现网络图揭示了6个研究集群,通过分析各集群的具体关键词进一步把握了该领域的研究热点。关键词的突现分析揭示了研究前沿和发展趋势,为功能性近红外光谱技术未来研究方向提供了重要指导。

关键词：功能性近红外光谱技术 CiteSpace VOSviewer 文献计量学知识图谱可视化分析