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The role of Cr content on the corrosion resistance of carbon steel and low-Cr steels in the CO_(2)-saturated brine

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Petroleum Science 2023年第2期20卷 1155-1168页

作者： Cai-Lin Wang Hong-Da Guo Jian Fang sheng-xian yu Xiao-Qi yue Qi-Hui Hu Cui-Wei Liu Jia-Xuan Zhang Rui Zhang Xiu-Sai Xu Yong Hua yu-Xing Li College of Pipeline and Civil Engineering China University of Petroleum(East China)QingdaoShandong 266580China Shandong Provincial Key Laboratory of Oil&Gas Storage and Transportation Security China University of Petroleum(East China)QingdaoShandong 266580China School of Materials Science and Engineering China University of Petroleum(East China)QingdaoShandong 266580China Corrosion and Integrity Centre Zhejiang JIULI Hi-Tech Metals Co.LtdHuzhouZhejiang 313000China Institute of Advanced Materials and Technology University of Science and Technology BeijingBeijing100083China Pipechina Engineering Technology Innovation Co. LtdTianjin 300000China

The selection of appropriate materials for the transportation pipelines is of vital importance to ensure the safety operation in Carbon Capture,Utilisation and Storage(CCUS).To clarify the effects of Cr content in steel on the resistance against general and localised corrosion,electrochemistry methods combined with pH measurements and various surface analysis techniques were implemented on X65,1Cr,3Cr and 5Cr steel samples in a CO_(2)-saturated solution at 60°C and pH 6.6 during 192 h of ***,thermodynamic and kinetic analyses of the formation of the corrosion products on carbon steel and low-Cr steels were *** results show that the general corrosion resistance increased with rising Cr content without the presence of significant corrosion products ***,with the formation and development of the corrosion products,the general corrosion resistance reduced with the increase in Cr *** formation of the compact crystalline FeCO3 on X65 and 1Cr steel surfaces offered superior general corrosion protection,while cannot provide enough localised corrosion *** contrast,the double-structural corrosion product layers on 3Cr and 5Cr steels notably suppressed the localised corrosion,but providing poor protection against general corrosion over long immersion *** study reveals the contributions of Cr content on general and localised corrosion resistance at various periods,providing references for material selection and evaluation in CO_(2) environments relevant for CCUS.

关键词： CO_(2)corrosion Material selection Cr content CCUS

PREPARATION AND CHARACTERIZATION OF K₁₃[Nd(Gew₉Mo₂O₃₉₂]·23H₂O

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Chinese Chemical Letters 1994年第1期5卷 59-62页

作者： Qing Yin WU sheng xian XU and yu Lin SONG (Department of Chemistry, Liaoning University, Shenyang, 110036)(Author to whom correspondence should be addressed.)

The heteropoly comples K(13)[Nd (GeW9Mo2O(39)2]·23H2O has been prepared for the first time and characterized by chemical analysis, IR spectrum, UV spectrum, X-ray powder diffrection and thermal analysis.

关键词： Nd Mo Gew9Mo2O

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我军高原卫生装备体系结构分析与发展思考

军事医学 2017年第7期41卷 607-610页

作者：刘显胜高钰琪第三军医大学高原军事医学系高原特需药品与卫生装备研究室重庆400038 解放军第五医院医务处银川750003

目的研究适应高原卫勤保障特殊需求的高原卫生装备发展战略。方法将高原卫生装备体系结构分成3层,探索其既各自独立又相互依存的战略关系。结果高原通用卫生装备是基础,是现阶段高原卫勤保障的重要物质力量。高原专用卫生装备是主体,是... 详细信息

目的研究适应高原卫勤保障特殊需求的高原卫生装备发展战略。方法将高原卫生装备体系结构分成3层,探索其既各自独立又相互依存的战略关系。结果高原通用卫生装备是基础,是现阶段高原卫勤保障的重要物质力量。高原专用卫生装备是主体,是短期内高原卫勤保障中有一定高原环境实践的装备技术支撑。高原特需卫生装备是核心,是未来高原卫生装备研发战略的重点,科技含量高、高原针对性强。结论高原卫生装备研发战略既要立足国情,又要有研发重点,在现有高原卫生装备基础上研发形成结构明晰、功能互补、重点突出和目的明确的高原卫生装备体系。

关键词：高原专用卫生装备高原卫勤保障卫勤需求

下线性与混合线性情况下的无限域上非线性p-Laplacian问题

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四川大学学报（自然科学版） 2004年第4期41卷 732-735页

作者：喻宪生于开宣西安邮电学院西安710061 成都广播电视大学成都610051

研究了无限域上的非线性 p Laplacian问题 .利用变分极值理论证明了如果下线性以及混合线性情况满足一定条件则非线性 p Laplacian问题有正解 .

关键词：椭圆问题非线性p-Laplacian问题正解

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分式线性递推数列极限的换元解法

高等数学研究 2011年第4期14卷 72-74页

作者：孙胜先余丙森合肥工业大学数学学院安徽合肥230009

给出由关系式xn+1=(axn+b)/(cxn+d)所确定的分式线性递推数列极限的换元解法.

关键词：分式线性递推数列极限换元解法二阶差分方程

A method for classifying orbits near asteroids

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Acta Mechanica Sinica 2014年第3期30卷 316-325页

作者： xian-yu Wang sheng-Ping Gong Jun-Feng Li Department of Aerospace Engineering Tsinghua University

A method for classifying orbits near asteroids under a polyhedral gravitational field is presented, and may serve as a valuable reference for spacecraft orbit design for asteroid exploration. The orbital dynamics near aster- oids are very complex. According to the variation in orbit characteristics after being affected by gravitational perturbation during the periapsis passage, orbits near an as- teroid can be classified into 9 categories：（1） surrounding- to-surrounding, （2） surrounding-to-surface, （3） surrounding- to-infinity, （4） infinity-to-infinity, （5） infinity-to-surface, （6） infinity-to-surrounding, （7） surface-to-surface, （8） surface- to-surrounding, and （9） surface-to- infinity. Assume that the orbital elements are constant near the periapsis, the gravitation potential is expanded into a harmonic series. Then, the influence of the gravitational perturbation on the orbit is studied analytically. The styles of orbits are dependent on the argument of periapsis, the periapsis radius, and the periapsis velocity. Given the argument of periapsis, the orbital energy before and after perturbation can be derived according to the periapsis radius and the periapsis velocity. Simulations have been performed for orbits in the gravitational field of 216 Kleopatra. The numerical results are well consistent with analytic predictions.

关键词： Asteroid. Orbital classification 216 Kleopatra-Orbit prediction Polyhedral gravitational field

Heralded amplification of single-photon entanglement with polarization feature

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Frontiers of physics 2018年第5期13卷 241-249页

作者： yu-yu Jin sheng-xian Qin Hao Zu Lan Zhou Wei Zhong yu-Bo sheng School of Science Nanjing University of Posts and Telecommunications Nanjing 210003 China New Energy Technology Engineering Laboratory of Jiangsu Province Nanjing University of Posts and Telecommunications Nanjing 210003 China Key Lab of Broadband Wireless Communication and Sensor Network Technology Nanjing University of Posts and Telecommunications Ministry of Education Nanjing 210003 China Institute of Signal Processing Transmission Nanjing University of Posts and Telecommunications Nanjing 210003 China

Heralded noiseless amplification is beneficial in overcoming transmission photon loss in a noisy quantum channel. We propose a single-photon-assisted heralded noiseless amplification protocol of the single- photon entanglement （SPE）, where the single-photon qubit has an arbitrary unknown polarization feature. We focus on both the complete and partial photon loss during the transmission process. After the amplification, the parties can recover the pure less-entangled SPE into a maximally entangled SPE and increase its fidelity. Moreover, the polarization feature of the single-photon qubit will be well preserved and not be leaked. Our protocol can be realized under our current experimental condition. Based on the features above, our protocol may be useful in the quantum secure communication schemes that encode information in the polarization degree of freedom of photons.

关键词： quantum communication single-photon entanglement quantum state amplification polarization feature

An adaptive learning rate GMM for background extraction

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Optoelectronics Letters 2008年第6期4卷 460-463页

作者： sheng Zun-bing CUI xian-yu Advanced Manufacturing Technology Center Harbin Institute of Technology Harbin 150001 China

The rapidness and stability of background extraction from image sequences are incompatible,that is,when a conventional Gaussian mixture models (GMM)is used to rebuild the background,if the background regions of the scene are changed,the extracted background becomes bad until the transition is over. A novel adaptive method is presented to adjust the learning rate of GMM in a Hilbert space. The background extraction is treated as a process of approaching to a certain point in the Hilbert space,so the real-time learning rate can be obtained by calculating the distance between the two adjacent extracted background images,and a judgment method of the stability of background is got too. Compared with conventional GMM,the method has both high rapidness and good stability at the same time,and it can adjust the learning rate online. The experiment shows that it is better than conventional GMM,especially in the transition process of background extraction.

关键词： GMM 适应性学习比率背景选择信息处理

Auxin-Cytokinin Interaction Regulates Meristem Development

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Molecular Plant 2011年第4期4卷 616-625页

作者： Ying-Hua Su yu-Bo Liu xian-sheng Zhang State Key Laboratory of Crop Biology College of Life Sciences Shandong Agricultural University Taian Shandong 271018 China

Plant hormones regulate many aspects of plant growth and development. Both auxin and cytokinin have been known for a long time to act either synergistically or antagonistically to control several significant developmental processes, such as the formation and maintenance of meristem. Over the past few years, exciting progress has been made to reveal the molecular mechanisms underlying the auxin-cytokinin action and interaction. In this review, we shall briefly discuss the major progress made in auxin and cytokinin biosynthesis, auxin transport, and auxin and cytokinin signaling. The frameworks for the complicated interaction of these two hormones in the control of shoot apical meristem and root apical meristem formation as well as their roles in in vitro organ regeneration are the major focus of this review.

关键词： Auxin cytokinin interaction shoot meristem root meristem development.