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Microstructure and magnetocaloric properties of melt-extracted SmGdDyCoAl high-entropy amorphous microwires

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Rare Metals 2024年第3期43卷 1234-1242页

作者： Shi-Jie Wei Hong-xian Shen lun-Yong Zhang Lin Luo Xin-Xing Tang Jian-Fei Sun Xiao-Qing Li School of Materials Science and Engineering Harbin Institute of TechnologyHarbin150001China Applied Materials Physics Department of Materials Science and EngineeringKTH-Royal Institute of Technology10044StockholmSweden

This paper presents a systematic investigation of the microstructure and magnetocaloric properties of melt-extracted Sm_(20)Gd_(20)Dy_(20)Co_(20)Al_(20)high-entropy *** fabricated wires exhibited an amorphous structure,and the temperature interval of the undercooled liquid AT was 45 *** microwires underwent a second-order magnetic transition from a ferromagnetic to a paramagnetic state near the Curie temperature(T_(C)=52 K),The maximum magnetic entropy change(-ΔS_M^(max)),the relative cooling power and the refrigeration capacity reached 6.34 J·kg^(-1)·K^(-1).422.09 J·kg^(-1)and 332.94 J·kg^(-1),respectively,under a magnetic field change of 5 *** addition,the temperature-averaged entropy changes with two temperature lifts(3 and 10 K)were 6.32 and 6.27 J·kg^(-1)·K^(-1),*** good magnetocalorie performance highlights the significant potential for the Sm_(20)Gd_(20)Dy_(20)Co_(20)Al_(20)microwires to be used as magnetic refrigerant materials in low-temperature region *** work will serve as a valuable reference for future investigations on low-temperature high-entropy magnetocaloric materials.

关键词： Melt-extraction High-entropy amorphous microwires Magnetocaloric effect Magnetic refrigeration

A reference-grade genome of the xerophyte Ammopiptanthus mongolicus sheds light on its evolution history in legumes and droughttolerance mechanisms

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Plant Communications 2024年第7期5卷 157-177页

作者： Lei Feng Fei Teng Na Li Jia-Cheng Zhang Bian-jiang Zhang Sau-Na Tsai Xiu-Le Yue Li-Fei Gu Guang-Hua Meng Tian-Quan Deng Suk-Wah Tong Chun-Ming Wang Yan Li Wei Shi Yong-lun Zeng Yue-Ming jiang Weichang Yu Sai-Ming Ngai Li-Zhe An Hon-Ming Lam Jun-xian He School of Life Sciences and State Key Laboratory of Agrobiotechnology The Chinese University of Hong KongSha TinNew TerritoriesHong KongChina Guangdong Provincial Key Laboratory of Biotechnology for Plant Development School of Life SciencesSouth China Normal UniversityGuangzhou 510631China BGI-Shenzhen Tech Co. Ltd.Beishan Industrial ZoneYantian DistrictShenzhen 518083China School of Life Sciences and Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations Lanzhou UniversityLanzhou 730030China State Key Laboratory of Subtropical Silviculture Zhejiang Agriculture and Forestry UniversityHangzhou 311300China State Key Laboratory of Plant Diversity and Specialty Crops South China Botanical GardenChinese Academy of SciencesGuangzhou 510650China Guangdong Provincial Key Laboratory of Applied Botany&Key Laboratory of South China Agricultural Plant Molecular Analysis and Genetic Improvement South China Botanical GardenChinese Academy of SciencesGuangzhou 510650China College of Life Sciences and Oceanography Shenzhen UniversityShenzhen 518060China State Key Laboratory of Efficient Production of Forest Resources Beijing Forestry UniversityBeijing 100083China

Plants that grow in extreme environments represent unique sources of stress-resistance genes and *** mongolicus(Leguminosae)is a xerophytic evergreen broadleaf shrub native to semi-arid and desert regions;however,its drought-tolerance mechanisms remain poorly ***,we report the assembly of a reference-grade genome for ***,describe its evolutionary history within the legume family,and examine its drought-tolerance *** assembled genome is 843.07 Mb in length,with 98.7%of the sequences successfully anchored to the nine chromosomes of *** genome is predicted to contain 47611 protein-coding genes,and 70.71%of the genome is composed of repetitive sequences;these are dominated by transposable elements,particularly longterminal-repeat *** analyses revealed two whole-genome duplication(WGD)events at 130 and 58 million years ago(mya)that are shared by the genus Ammopiptanthus and other legumes,but no species-specific WGDs were found within this *** genome reconstruction revealed that the *** genome has undergone fewer rearrangements than other genomes in the legume family,confirming its status as a"relict plant".Transcriptomic analyses demonstrated that genes involved in cuticular wax biosynthesis and transport are highly expressed,both under normal conditions and in response to polyethylene glycol-induced *** induction of genes related to ethylene biosynthesis and signaling was also observed in leaves under dehydration stress,suggesting that enhanced ethylene response and formation of thick waxy cuticles are two major mechanisms of drought tolerance in *** expression of AmERF2,an ethylene response factor unique to ***,can markedly increase the drought tolerance of transgenic Arabidopsis thaliana plants,demonstrating the potential for application of *** genes in crop improvement.

关键词： Ammopiptanthus mongolicus genome sequencing genome evolution drought tolerance cuticular wax ethylene

Enhanced cooperative MAC for wireless local area networks

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The Journal of China Universities of Posts and Telecommunications 2011年第5期18卷 7-14页

作者： jiang Fan FAN Jiu-lun CHANG Zhi-xian School of Communications and Information Engineering Xi＇an University of Posts and Telecommunications Xi＇an 710121 China

A novel network protocol, enhanced cooperative medium access control （ECoop MAC）, is present in this article. Its function is to guarantee the quality of service （QoS） in wireless local area networks. For the sake of supporting different application scenarios, two proposed schemes, namely E-scheme I for lower priority traffic and E-scheme II for higher priority traffic can be adopted independently or in combination. ECoop MAC takes into account request failure problems, and utilizes cooperative protocol information to boost the system performance as well as to effectively cut control packets overhead. Simulation results show that the proposed algorithm can not only improve network throughput, but also lead to reduced network delays for individual packets.

关键词： MAC protocols cooperative communication game theory QoS

Mobile robot SLAM method based on multi-agent particle swarm optimized particle filter

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The Journal of China Universities of Posts and Telecommunications 2014年第6期21卷 78-86页

作者： TANG xian-lun LI La-mei jiang Bo-jie Key Laboratory of Industrial Internet of Things & Networked Control Ministry of EducationChongqing University of Posts and Telecommunications

To overcome particle impoverishment, a simultaneous localization and mapping（SLAM） method based on multi-agent particle swarm optimized particle filter（MAPSOPF） was presented by introducing the idea of multi-agent to the particle swarm optimized particle filter（PSOPF） which is an algorithm for SLAM. In MAPSOPF, agents can communicate and compete with each other and learn from each other. The MAPSOPF algorithm can update the prediction of particle, adjust the proposal distribution of particles, improve localization precision and fault tolerance, and propel the particles to concentrate on the robot＇s true pose. Compared with standard particle filter（PF）, the proposed method can achieve better SLAM precision by fewer particles. Simulations verify its effectiveness and feasibility.

关键词： PF multi-agent system(MAS) particle swarm optimization(PSO) SLAM

Energy-balanced unequal clustering protocol for wireless sensor networks

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The Journal of China Universities of Posts and Telecommunications 2010年第4期17卷 94-99页

作者： jiang Chang-jiang SHI Wei-ren xianG min TANG xian-lun College of Automation Chongqing University Chongqing 400044 China College of Automation Chongqing University of Posts and Telecommunications Chongqing 400065 China

Clustering provides an effective way to prolong the lifetime of wireless sensor networks. One of the major issues of a clustering protocol is selecting an optimal group of sensor nodes as the cluster heads to divide the network. Another is the mode of inter-cluster communication. In this paper, an energy-balanced unequal clustering （EBUC） protocol is proposed and evaluated. By using the particle swarm optimization （PSO） algorithm, EBUC partitions all nodes into clusters of unequal size, in which the clusters closer to the base station have smaller size. The cluster heads of these clusters can preserve some more energy for the inter-cluster relay traffic and the ＇hot-spots＇ problem can be avoided. For inter-cluster communication, EBUC adopts an energy-aware multihop routing to reduce the energy consumption of the cluster heads. Simulation results demonstrate that the protocol can efficiently decrease the dead speed of the nodes and prolong the network lifetime.

关键词： wireless sensor networks clustering protocol PSO algorithm multihop routing

Joint chance‐constrained coordinated scheduling for electricity‐heat coupled systems considering hydrogen storage

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Energy Internet 2024年第1期1卷 99-111页

作者： lun Yang Xunhang Sun Xiaoyu Cao Mengxiao Chen Xiaohong Guan School of Automation Science and Engineering Xi’an Jiaotong UniversityXi’anChina

Strong interdependence between power production and heat supply from combined power and heat units could restrict the wind power *** hydrogen storage,typically formed by the electrolyser,hydrogen tank,and fuel cell,could be a promising measure to accommodate surplus wind power and facilitate the coordinated operation of power and *** authors consider coordinated scheduling under wind power uncertainty for an electricity‐heat coupled system with hydrogen storage and propose a distributionally robust joint chance‐constrained coordinated scheduling(DRJCC‐CS)model,where the waste heat from the electrolyser and fuel cell is *** authors design distributionally robust joint chance constraints to account for wind power uncertainty related constraints and derive their tractable inner and outer mixed‐integer convex ***,the proposed DRJCC‐CS model is casted into a mixed‐integer convex *** studies are conducted to demon-strate the effectiveness of the proposed DRJCC‐CS method.

关键词： Strong coordinated constrained

Stepwise assembly of heterometallic 3d–4f chain exhibiting slow magnetic relaxation

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Chinese Chemical Letters 2016年第3期27卷 317-320页

作者： Mei-Hui Yu Xue jiang Song-De Han Qing-lun Wang xian-He Bu School of Materials Science and Engineering TKL of Metal- and Molecule-Based Material Chemistry and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)Nankai University Department of Chemistry Nankai University

The self-assembly of polyalcohol ligand 1,1,1-tris（hydroxymethyl）ethane with Dy（NO3）3· 6H2 O and Cr3O-Bzo-t-Bu precursor in the presence of triethylamine step-by-step generated a heterometallic 3d–4f chain. Magn... 详细信息

关键词： 3d–4f Chain Stepwise assembly Slow magnetic relaxation

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线粒体靶向抗氧化剂MitoQ研究进展

农业生物技术学报 2024年第6期32卷 1432-1439页

作者：谭宁李巴仑艾力·艾尔肯赵献军华进联西北农林科技大学动物医学院/陕西省干细胞工程技术研究中心百欧派(天津)生物技术有限公司

米托蒽醌甲磺酸盐(mitoquinone mesylate, MitoQ)作为一种线粒体靶向抗氧化剂，已被证明能够减缓线粒体的氧化应激损伤、靶向线粒体以抵抗凋亡等，维持机体健康。现有研究已经证明MitoQ对于细胞损伤、器官损伤修复及各类疾病治疗具有重... 详细信息

米托蒽醌甲磺酸盐(mitoquinone mesylate, MitoQ)作为一种线粒体靶向抗氧化剂，已被证明能够减缓线粒体的氧化应激损伤、靶向线粒体以抵抗凋亡等，维持机体健康。现有研究已经证明MitoQ对于细胞损伤、器官损伤修复及各类疾病治疗具有重要的作用。本文综述了MitoQ的抗氧化、抵抗细胞炎症凋亡和其线粒体靶向性等生物学功能，并系统总结了MitoQ治疗神经退行性疾病、心血管损伤、代谢器官损伤和糖尿病的研究进展。本文为MitoQ在细胞生物学和临床疾病治疗中的应用提供参考。

关键词：米托蒽醌甲磺酸盐(MitoQ) 线粒体抗氧化治疗

施磷对夏花生产量品质、光温生理特性及根系形态的影响

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作物学报 2024年第7期50卷 1841-1854页

作者：杨启睿李岚涛张铎王雅娴盛开王宜伦河南农业大学资源与环境学院河南郑州450046

探究不同施磷水平对夏花生产量、品质及磷素积累动态、光温生理特性和根系形态影响效应,为花生高效科学施用磷肥提供理论支持。2021—2022年在河南省温县布置磷肥用量田间试验,供试品种为“豫花22”,设P2O50、30、60、90、120 kg hm^(-... 详细信息

探究不同施磷水平对夏花生产量、品质及磷素积累动态、光温生理特性和根系形态影响效应,为花生高效科学施用磷肥提供理论支持。2021—2022年在河南省温县布置磷肥用量田间试验,供试品种为“豫花22”,设P2O50、30、60、90、120 kg hm^(-2)5个磷肥用量处理。于成熟期测定夏花生荚果产量和品质指标,并分别于苗期、花针期、结荚期、饱果期测定叶片SPAD值、冠层光合有效辐射和冠层温度,采集植株样品分析植株磷素积累量和根系形态。结果表明,随施磷量增加,2年夏花生荚果产量均呈“线性+平台”趋势变化,适宜施磷量分别为94 kg hm^(-2)和95 kg hm^(-2),施磷处理2年平均增产23.68%。成熟期籽粒粗蛋白、含油量和氨基酸含量均随施磷量增加呈“先升高后趋于稳定”趋势变化。与不施磷相比,施磷90 kg hm^(-2)时籽粒粗蛋白、含油量和氨基酸含量2年度平均增幅分别为11.06%、3.89%和11.58%,效果显著。通过Logistic方程对夏花生磷素积累量进行非线性回归拟合,得出施磷处理通过提高夏花生磷素最大积累速率(V_(m))和平均积累速率(V),延长快速积累期(Δt)与活跃积累期(T_(aas)),进而提高磷素最大积累量(Y_(m));适量施磷提高各部位磷素吸收积累量,促进磷素向荚果中分配。夏花生冠层最高温、最低温与平均温均随施磷量的增加显著降低;叶片SPAD值与冠层光合有效辐射量(APAR)和分量(FPAR)在施磷90 kg hm^(-2)时显著增加;施磷处理夏花生耕层总根长、根平均直径、根体积和根表面积分别平均增加48.50%、16.25%、37.80%和21.88%。磷肥利用率和偏生产力随施磷量增加逐渐降低,农学效率呈先升高后降低的变化趋势。合理施磷可显著提高夏花生产量、改善品质,促进磷素积累利用并显著改善生育期光温生理性能。本试验条件下夏花生推荐施磷量为90 kg hm^(-2)。

关键词：花生施磷量产量品质光温特性磷肥利用率 Logistic