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Effect of Nb on the dynamic recrystallization behavior of high-grade pipeline steels

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International Journal of Minerals,Metallurgy and Materials 2010年第6期17卷 742-747页

作者： Tao Niu Yong-lin Kang hong-wei Gu Yu-qun yin Ming-liang qiao Jin-xing Jiang School of Materials Science and Engineering University of Science and Technology Beijing Beijing 100083 China State Key Laboratory for Advanced Metals and Materials University of Science and Technology Beijing Beijing 10083 China Nanjing Iron and Steel Co. Ltd. Nanjing 210035 China

The dynamic recrystallization （DRX） behavior of high-grade X80/X100 pipeline steels with different Nb contents was investi- gated through single pass compression experiment using a Gleeble 1500 thermomechanical simulator. By the regression of stress-sWain data obtained in the experiment, the deformation activation energy of DRX was identified, and the critical strain was calculated with the Po- liak-Jonas （P-J） method. Based on the analysis, the occurrence condition and kinetics of DRX were determined. The results show that as the Nb content increases from 0.08wt% to 0.095wt%, the activation energy of recrystallization raises from 365 to 395 kJ/mol. The critical swain of DRX can be determined more accurately by the P-J method, and the ratios of critical swain to peak sWain of XS0 and X100 pipeline steels are 0.51 and 0.49, respectively, which are similar to the results achieved by other researchers and calculated with empirical formulae.

关键词： pipeline steels niobium dynamic recrystallization activation energy retardation kinetics

SPEI_(PM)-based research on drought impact on maize yield in North China Plain

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Journal of Integrative Agriculture 2015年第4期14卷 660-669页

作者： MING Bo GUO yin-qiao TAO hong-bin LIU Guang-zhou LI Shao-kun WANG Pu Institute of Crop Science Chinese Academy of Agricultural Sciences/Key Laboratory of Crop Physiology and EcologyMinistry of Agriculture College of Agriculture and Biotechnology China Agricultural University

The calculation method of potential evapotranspiration（PET） was improved by adopting a more reliable PET estimate based on the Penman-Monteith equation into the standardized precipitation evapotranspiration index（SPEI） in this study（SPEI PM）. This improvement increased the applicability of SPEI in North China Plain（NCP）. The historic meteorological data during 1962–2011 were used to calculate SPEI PM. The detrended yields of maize from Hebei, Henan, Shandong, Beijing, and Tianjin provinces/cities of NCP were obtained by linear sliding average method. Then regression analysis was made to study the relationships between detrended yields and SPEI values. Different time scales were applied, and thus SPEI PM was mentioned as SPEI PMk-j（k=time scale, 1, 2, 3, 4,…, 24 mon; j=month, 1, 2, 3,..., 12）, among which SPEI PM3-8 reflected the water condition from June to August, a period of heavy precipitation and vigorous growth of maize in NCP. SPEI PM3-8 was highly correlated with detrended yield in this region, which can effectively evaluate the effect of drought on maize yield. Additionally, this relationship becomes more significant in recent 20 yr. The regression model based on the SPEI series explained 64.8% of the variability of the annual detrended yield in Beijing, 45.2% in Henan, 58.6% in Shandong, and 54.6% in Hebei. Moreover, when SPEI PM3-8 is in the range of –0.6 to 1.1, –0.9 to 0.8 and –0.8 to 2.3, the detrended yield increases in Shandong, Henan and Beijing. The yield increasing range was during normal water condition in Shandong and Henan, where precipitation was abundant. It indicated that the field management matched well with local water condition and thus allowed stable and high yield. Maize yield increase in these two provinces in the future can be realized by further improving water use efficiency and enhancing the stress resistance as well as yield stability. In Hebei and Beijing, the precipitation is less and thus the normal water condition cannot meet

关键词： North China Plain maize(Zea mays L.) drought climate-determined yield standardized precipitation evapotranspiration index

Truxene-based Conjugated Microporous Polymers via Different Synthetic Methods

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Chinese Journal of Polymer Science 2020年第2期38卷 151-157,I0006页

作者： Meng-Yang Wang Qiu-Jing Zhang qiao-qiao Shen Qing-yin Li Shi-Jie Ren College of Polymer Science and Engineering State Key Laboratory of Polymer Materials Engineering Sichuan University

Four truxene-based conjugated microporous polymers(Tr-CMPs)were prepared via different synthetic methods and their structure-property relationships were *** polymer networks have high Brunauer-Emmett-Teller(BET)specific surface areas ranging from 554 m^2·g^–1to 1024 m^2·g^–*** sizes of the CMPs with different linkers are mainly located between 0.60 and 1.96 *** all the Tr-CMPs,TrCMP4 has the highest BET surface area of 1024 m^2·g^–1and exhibits the highest H2 uptake of 0.88 wt%.Tr-CMP2 prepared by Suzuki-Miyaura coupling reaction has the highest photoluminescence quantum yields(PLQYs)of 13.06% and CO2 uptake of 6.25 wt%.

关键词： Conjugated microporous polymers Truxene Photophysical properties Gas sorption

Precise Control of Self-assembly in vivo Based on Polymer-Peptide Conjugates

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Chinese Journal of Chemistry 2022年第23期40卷 2815-2824页

作者： yin-Sheng Xu Hao Wang Zeng-ying qiao CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety CAS Center for Excellence in NanoscienceNational Center for Nanoscience and Technology(NCNST)Center of Materials Science and Optoelectronics EngineeringUniversity of Chinese Academy of SciencesBeijing 100190China

The self-assembled nanomaterials based on peptides,which have not only good biocompatibility and low toxicity but also high stability and performance,are increasingly becoming an important way for cancer *** this review,we highlight the progress of in vivo self-assembled polymer-peptide conjugates(PPCs)and their application,showing the recent advances in the development of“in vivo self-assembly”strategy for cancer *** the diverse microenvironments of tumor cells,different responsive assembly strategies(enzyme,pH,redox,temperature,etc.)have been developed to precisely control the assembly at different biological levels,realizing enhanced drug delivery and improved anticancer efficacy.

关键词： Polymer-peptide conjugates Drug design In vivo self-assembly Drug delivery Antitumor agents

Functionally Oriented Tumor Microenvironment Responsive Polymeric Nanoassembly:Engineering and Applications

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Chinese Journal of Polymer Science 2018年第3期36卷 273-287页

作者： Wen-Ming Zhang Jian Zhang Zhu qiao Jun yin Department of Polymer Science and Engineering School of Chemistry and Chemical EngineeringHefei University of Technology and Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction EngineeringHefei 230009China

The excellent drug encapsulation,prolonged in vivo circulation time,enhanced pharmacokinetics,and reduced adverse effects make the polymeric assemblies ideal carriers in nanomedicine,and become an emerging research field with rapid *** vivo,the polymer nanoassemblies will experience five steps,including circulation in the blood,accumulation in the tumoral site,penetration into the deep tumor tissue to reach cancer cells,internalization into cancer cells,and intracellular drug ***,although tremendous efforts have been made to the material design,currently available carriers still have difficulties in fulfilling all of the ***,the long-standing dilemma of the synchronized stability and permeability of vesicles is still a big challenge,which confused researchers for a long *** feature article tbcuses on the recent progress of single-or multi-stimuli triggered theranostic platforms,and the extracellularly reengineered shell-sheddable polymeric nanocarriers are systematically *** perspectives for future developments in the nanocarriers functioned with artificial helical polymers(the potential cell-penetrating peptides mimics)are also *** speculate that this feature article can fit the interesting of diverse readers and a guideline for the design of next generation of drug nanocarriers.

关键词： Block copolymers Tumor microenvironment responsive Self-assembly Theranostic Nanomedicine

Terrain classification and adaptive locomotion for a hexapod robot Qingzhui

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Frontiers of Mechanical Engineering 2021年第2期16卷 271-284页

作者： Yue ZHAO Feng GAO qiao SUN Yunpeng yin State Key Laboratory of Mechanical System and Vibration School of Mechanical EngineeringShanghai Jiao Tong UniversityShanghai 200240China

Legged robots have potential advantages in mobility compared with wheeled robots in outdoor environments. The knowledge of various ground properties and adaptive locomotion based on different surface materials plays an important role in improving the stability of legged robots. A terrain classification and adaptive locomotion method for a hexapod robot named Qingzhui is proposed in this paper. First, a force-based terrain classification method is suggested. Ground contact force is calculated by collecting joint torques and inertial measurement unit information. Ground substrates are classified with the feature vector extracted from the collected data using the support vector machine algorithm. Then, an adaptive locomotion on different ground properties is proposed. The dynamic alternating tripod trotting gait is developed to control the robot, and the parameters of active compliance control change with the terrain. Finally, the method is integrated on a hexapod robot and tested by real experiments. Our method is shown effective for the hexapod robot to walk on concrete, wood, grass, and foam. The strategies and experimental results can be a valuable reference for other legged robots applied in outdoor environments.

关键词： terrain classification hexapod robot legged robot adaptive locomotion gait control

Smart Gait:A Gait Optimization Framework for Hexapod Robots

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Chinese Journal of Mechanical Engineering 2024年第1期37卷 146-159页

作者： Yunpeng yin Feng Gao qiao Sun Yue Zhao Yuguang Xiao State Key Laboratory of Mechanical System and Vibration School of Mechanical EngineeringShanghai Jiao Tong UniversityShanghai 200240China Lenovo Corporation ShanghaiChina AI Institute School of Electronic Information and Electrical EngineeringShanghai Jiao Tong UniversityShanghai 200240China

The current gait planning for legged robots is mostly based on human presets,which cannot match the flexible characteristics of natural *** paper proposes a gait optimization framework for hexapod robots called Smart *** Gait contains three modules:swing leg trajectory optimization,gait period&duty optimization,and gait sequence *** full dynamics of a single leg,and the centroid dynamics of the overall robot are considered in the respective *** Smart Gait not only helps the robot to decrease the energy consumption when in locomotion,mostly,it enables the hexapod robot to determine its gait pattern transitions based on its current state,instead of repeating the formalistic clock-set step *** Smart Gait framework allows the hexapod robot to behave nimbly as a living animal when in 3D movements for the first *** Smart Gait framework combines offline and online optimizations without any fussy data-driven training procedures,and it can run efficiently on board in real-time after *** experiments are carried out on the hexapod robot *** results show that the energy consumption is reduced by 15.9%when in *** gait patterns can be generated spontaneously both in regular and challenge environments,and when facing external interferences.

关键词： Gait optimization Swing trajectory optimization Legged robot Hexapod robot

Genome-wide identification of imprinted genes in pigs and their different imprinting status compared with other mammals

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Zoological Research 2020年第6期41卷 721-725页

作者： yin-qiao Wu Heng Zhao ying-Ju Li Saber Khederzadeh hong-Jiang Wei Zhong-yin Zhou Ya-Ping Zhang State Key Laboratory of Genetic Resources and Evolution and Yunnan Laboratory of Molecular Biology of Domestic AnimalsKunming Institute of ZoologyChinese Academy of SciencesKunmingYunnan 650223China Kunming College of Life Science University of Chinese Academy of SciencesKunmingYunnan 650204China Key Laboratory of Animal Gene Editing and Animal Cloning in Yunnan Province Yunnan Agricultural UniversityKunmingYunnan 650201China Center for Excellence in Animal Evolution and Genetics Chinese Academy of SciencesKunmingYunnan 650223China

DEAR EDITOR,Genomic imprinting often results in parent-of-origin specific differential expression of maternally and paternally inherited alleles and plays an essential role in mammalian development and *** genomic imprinting has primarily been studied in mice and humans,with only limited information available for *** systematically characterize this phenomenon and evaluate imprinting status between different species,we investigated imprinted genes on a genome-wide scale in pig brain tissues.

关键词： imprinting imprint primarily

APJTM streamlines content coverage and submission process to better support tropical medicine research

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Asian Pacific Journal of Tropical Medicine 2022年第6期15卷 239-240页

作者： Yan Lei qiao Zhang yin Pan Editorial Office of Asian Pacific Journal of Tropical Medicine Hainan Medical UniversityHaikou 571199China

Asian Pacific Journal of Tropical Medicine(APJTM)is a peer-reviewed open access monthly publication focusing on neglected tropical diseases and major diseases that are prevalent in the underdeveloped tropical *** Journal received an updated journal Impact Factor of 3.041 in the newly released 2021 Journal Citation Report,an increase of 148%over the past *** the 24 journals under the category of Tropical Medicine in the Science Citation Index-Expanded(SCIE),the Journal ranks 10/24(Q2).Although journal Impact Factor has several shortcomings and limitations,it is the most widely recognized indicator of journal prestige and impact[1].

关键词： journal shortcomings neglected