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Journal of Zhejiang University-Science C(Computers and Electronics) 2011年第4期12卷 273-279页

作者： yi GUO Zhe-zhuang xu Cai-lian CHEN Xin-ping GUAN Department of Automation Shanghai diao Tong University Shanghai 200240 China

This paper is concerned with the routing protocol design for large-scale wireless sensor and actor networks (WSANs).The actor-sensor-actor communication (ASAC) strategy is first proposed to guarantee the reliability of persistent actor-actor *** keep network connectivity and prolong network lifetime,we propose a dynamic gradient-based routing protocol (DGR) to balance the energy consumption of the *** the different communication ranges of sensors and actors,the DGR protocol uses a data load expansion strategy to significantly prolong the network *** balance coefficient and the routing re-establishment threshold are also introduced to make the tradeoff between network lifetime and routing *** results show the effectiveness of the proposed DGR protocol for unbalanced and persistent data transmission.

关键词： Wireless sensor and actor networks Unbalanced and persistent data transmission Gradient-based routing

Investigation on structural changes of isotactic polypropylene mesophase in the heating process by using two-dimensional infrared correlation spectroscopy

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Chinese Chemical Letters 2015年第2期26卷 197-199页

作者： Qian-Hong Jiang Chun-Bo Zhang Jian Yang ying Zhao yi-zhuang xu Du-Jin Wang Beijing National Laboratory for Molecular Sciences Key Laboratory of Engineering PlasticsInstitute of ChemistryChinese Academy of Sciences College of Chemistry and Molecular Engineering Peking University

Two-dimensional FT-IR correlation spectroscopy was used to reveal the structural changes of isotactic polypropylene（iPP） mesophase during the heating *** co-relationship among the regular helical bands of iPP was discussed according to synchronous *** results show that the segments with different length-helixes were found to undergo a disordered process in the temperature range of 25-60 ℃.

关键词： 2D-IR Isotactic polypropylene Mesophase

Genetic Analysis and Molecular Mapping of a Rolling Leaf Mutation Gene in Rice

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Journal of Integrative Plant Biology 2007年第12期49卷 1746-1753页

作者： Ji-Cai yi Chu-Xiong zhuang xu-Jie Wang You-Pei Cao Yao-Guang Liu Man-Tong Mei Key Laboratory of Plant Functional Genomics and Biotechnology of Guangdong Province College of Life Science South China Agricultural University Guangzhou 510642 China

A rice mutant with rolling leaf, namely γ-rl, was obtained from M2 progenies of a native indica rice stable strain Qinghuazhan （QHZ） from mutagenesis of dry seeds by γ-rays. Genetic analysis using the F2 population from a cross between this mutant and QHZ indicated the mutation was controlled by a single recessive gene. In order to map the locus for this mutation, another F2 population with 601 rolling leaf plants was constructed from a cross between y-rl and a japonica cultivar 02428. After primary mapping with SSR （simple sequence repeats） markers, the mutated locus was located at the short arm of chromosome 3, flanked by RM6829 and RM3126. A number of SSR, InDel （insertion/deletion） and SNP （single nucleotide polymorphism） markers within this region were further developed for fine mapping. Finally, two markers, SNP121679 and InDe1422395, were identified to be flanked to this locus with genetic distances of 0.08 cM and 0.17 cM respectively, and two SNP markers, SNP75346 and SNPl10263, were found to be co-segregated with this locus. These results suggested that this locus was distinguished from all loci for the rolling leaf mutation in rice reported so far, and thus renamed rl10（t）. By searching the rice genome database with closely linked markers using BLAST programs, an e-physical map covering rl10（t） locus spanning about a 50 kb region was constructed. Expression analysis of the genes predicted in this region showed that a gene encoding putative flavin-containing monooxygenase （FMO） was silenced in γ-rl, thus this is the most likely candidate responsible for the rolling leaf mutation.

关键词： fine mapping genetic analysis rice rolling leaf mutant.

Enhancement of low-temperature toughness of Fe-Mn-C-Al alloy by rare earth Ce-modified inclusions

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Journal of Iron and Steel Research International 2024年第1期31卷 157-173页

作者： Guang-kai Yang Chang-ling zhuang yi-zhuang Li Chen Hu Shao-bo Li College of Materials and Metallurgy Guizhou UniversityGuiyang550025GuizhouChina Department of Mechanical Engineering University of Hong KongHong Kong999077China The State Key Laboratory of Rolling and Automation Northeastern UniversityShenyang110819LiaoningChina State Key Laboratory of Public Big Data Guizhou UniversityGuiyang550025GuizhouChina

Fe-Mn-C-Al alloys have been recognized as promising materials for certain low-temperature applications due to their exceptional mechanical properties and ***,their limited low-temperature toughness restricts their large-scale applications in specific *** influence of trace amounts of rare earth cerium(Ce)on the low-temperature toughness of Fe-18Mn-0.6C-1.8Al alloys was *** addition of Ce effectively alters the inclu-sions in the alloy,transforming large-sized irregular inclusions into fine ellipsoidal rare earth *** leads to a significant reduction in both the proportion and average size of the inclusions,resulting in their effective dispersion throughout the matrix and improved cryogenic *** presence of Ce-containing inclusions within the matrix reduces stress concentration,thereby inhibiting microcrack formation and improving impact absorption ***-cally,the addition of rare earth Ce alters the fracture behavior of the material at room temperature and low temperature,changing from brittle cleavage fracture to a more ductile failure *** impact toughness of the Fe-Mn-C-Al alloy is significantly improved by the addition of 0.0048 wt.%Ce,particularly at-196℃where the impact toughness reaches 103.6 J/cm^(2),representing an impressive improvement of 87.3%.

关键词： Fe-Mn-C-Al alloy Rare earth Low-temperature toughness Inclusion Fracture

How to build a habitable planet:an interview with Charles H. Langmuir

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National Science Review 2024年第6期11卷 76-80页

作者： yi-Gang xu the Guangzhou Institute of Geochemistry Chinese Academy of Sciences

Earth is the only known habitable planet in the solar system. Understanding how Earth developed its unique habitability has been the frontier of Earth sciences and has become one of the main themes of current deep-space explorations. What are the decisive factors that led to a habitable planet? What is the role of solid Earth processes in the origin of life and in modulating the surface environment? Are Earth’s habitability studies relevant to current challenges that human beings face? These questions have attracted the interest of both scientists and the public alike.

关键词： Earth (planet)

Synergistic effect of gradient Zn content and multiscale particles on the mechanical properties of Al-Zn-Mg-Cu alloys with coupling distribution of coarse-fine grains

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International Journal of Minerals,Metallurgy and Materials 2024年第6期31卷 1392-1405页

作者： Liangliang Yuan Mingxing Guo yi Wang Yun Wang Linzhong zhuang Institute of Effectiveness Evaluation of Flying Vehicle Beijing 100085China State Key Laboratory for Advanced Metals and Materials University of Science and Technology BeijingBeijing 100083China Beijing Advanced Innovation Center for Materials Genome Engineering University of Science and Technology BeijingBeijing 100083China Beijing Laboratory of Metallic Materials and Processing for Modern Transportation University of Science and Technology BeijingBeijing 100083China

This study investigated the influence of graded Zn content on the evolution of precipitated and iron-rich phases and grain struc-ture of the alloys,designed and developed the Al–8.0Zn–1.5Mg–1.5Cu–0.2Fe(wt%)alloy with high strength and *** the increase of Zn content,forming the coupling distribution of multiscale precipitates and iron-rich phases with a reasonable matching ratio and dispersion distribution characteristics is *** phenomenon induces the formation of cell-like structures with alternate distribu-tion of coarse and fine grains,and the average plasticity–strain ratio(characterizing the formability)of the pre-aged alloy with a high strength is up to *** reveal the evolution and influence mechanisms of multiscale second-phase particles and the corresponding high formability mechanism of the *** developed coupling control process exhibits considerable potential,revealing remarkable improvements in the room temperature formability of high-strength Al–Zn–Mg–Cu alloys.

关键词： Al–Zn–Mg–Cu alloy iron-rich phase high formability microstructure mechanisms

A stable staggered-grid finite-difference scheme for acoustic modeling beyond conventional stability limit

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Petroleum Science 2024年第1期21卷 182-194页

作者： Jing-yi xu Yang Liu National Key Laboratory of Petroleum Resources and Engineering China University of Petroleum(Beijing)Beijing 102249China China University of Petroleum(Beijing) Karamay CampusKaramay 834000XinjiangChina

Staggered-grid finite-difference(SGFD)schemes have been widely used in acoustic wave modeling for geophysical *** improved methods are proposed to enhance the accuracy of numerical ***,these methods are inevitably limited by the maximum Courant-Friedrichs-Lewy(CFL)numbers,making them unstable when modeling with large time sampling intervals or small grid *** solve this problem,we extend a stable SGFD scheme by controlling SGFD dispersion relations and maximizing the maximum CFL ***,to improve modeling stability,we minimize the error between the FD dispersion relation and the exact relation in the given wave-number region,and make the FD dispersion approach a given function outside the given wave-number area,thus breaking the conventional limits of the maximum CFL ***,to obtain high modeling accuracy,we use the SGFD scheme based on the Remez algorithm to compute the FD *** addition,the hybrid absorbing boundary condition is adopted to suppress boundary reflections and we find a suitable weighting coefficient for the proposed *** derivation and numerical modeling demonstrate that the proposed scheme can maintain high accuracy in the modeling process and the value of the maximum CFL number of the proposed scheme can exceed that of the conventional SGFD scheme when adopting a small maximum effective wavenumber,indicating that the proposed scheme improves stability during the modeling.

关键词： Acoustic wave Staggered-grid finite-difference(SGFD) modeling Courant-friedrichs-lewy(CFL)number Stability

Interactions between pyridinium and Nd^(3+)

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Chinese Chemical Letters 2015年第2期26卷 182-186页

作者： Yu-Hai Liu Jia-Jia Shi Dan-Qing Gao Yun-Long Gao Ran Guo Xiao-Feng Ling Shi-Fu Weng yi-zhuang xu Isao Noda Jin-Guang Wu College of Chemistry and Molecular Engineering Peking University College of Chemistry and Materials Hebei Normal University School of Postgraduate Liaoning University of Traditional Chinese Medicine The third school of Clinical Medicine of Peking University Ninhai Doubly Advanced Martial Co. Ltd. Department of Materials Science and Engineering University of Delaware

In this paper,2D asynchronous spectra generated by using the DAOSD approach was utilized to probe interactions between Nd^3＋ and pyridinium dissolved in aqueous solution.A series of cross peaks in the resultant 2D asynchronous spectrum confirms the occurrence of intermolecular interaction between Nd^3＋and ***,no coordination occurs between Nd^3＋ and *** between πelectron from aromatic system and/electron from lanthanide ions account for the appearance of cross peaks in 2D asynchronous *** of the interaction,the emission spectrum of pyridinium exhibits a significant change when neodymium perchlorate was introduced into the system.

关键词： 2D asynchronous spectrum DAOSD Nd^3+ Intermolecular interaction

Volatiles in the mantle transition zone and their effects on big mantle wedge systems

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National Science Review 2024年第06期11卷 15-18页

作者： Yu Wang yi-Gang xu State Key Laboratory of Isotope Geochemistry Guangzhou Institute of Geochemistry Chinese Academy of Sciences Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou)

The mantle transition zone (MTZ), located between the upper and lower mantle, is characterized by sudden seismicvelocity discontinuities at depths of 410 and 660 km where significant change in mineralogical composition occurs. As a link between the upper and lower mantle,the MTZ is a layer of special significance in Earth’s deep structure, and a critical interface in geodynamics and material circulation.

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“Radicalism”and“Conservatism”:The Philosophical Argument of Human Enhancement Technologies(HET)and Its Resolution

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Fudan Journal of the Humanities and Social Sciences 2024年第3期17卷 437-454页

作者： yi Xianfei Liu zhuang Center for Moral and Cultural Studies School of MarxismHunan Normal UniversityChangshaHunan 410081China School of Marxism Hunan International Economics UniversityChangshaHunan 410205China

The philosophical debate between“radicalism”and“conservatism”in emerging human enhancement technologies(HET)has never *** their theoreti-cal claims seem to be distinct from each other,they actually share certain common-alities,which are mainly manifested in three aspects:first,they both hold certain illusions about emerging HET;second,they both reflect the loss of human subjec-tivity in the debate;and third,they both leave the premise of their propositions in *** on the reflection and grasp of these commonalities,we can grasp the possible boundaries of the dissolution of the two oppositions:let HET be“where it is in,”reconfigure anthropocentrism,suspend metaphysical myths,and turn to the“reality of human beings.”

关键词： HET-Radicalism Conservatism Philosophical controversy