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Enhanced thermoelectric performance of n-type TiCoSb halfHeusler by Ta doping and Hf alloying

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Rare Metals 2021年第1期40卷 40-47页

作者： rui-fang wang Shan Li Wen-Hua Xue Chen Chen Yu-Mei wang Xing-Jun Liu Qian Zhang School of Materials Science and Engineering Institute of Materials Genome and Big DataHarbin Institute of TechnologyShenzhen 518055China Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of ScienceBeijing 100190China

The p-type TiCoSb-based half-Heuslers are widely studied due to the good electrical transport properties after hole doping,while the pristine TiCoSb is intrinsically *** is thus desired to obtain a comparable n-type counterpart through optimization of electron *** this work,n-type Ti_(0.9-x)HfxTa_(0.1)CoSb half-Heuslers were fabricated by arc melting,ball milling,and spark plasma *** optimized carrier concentration,together with a decreased lattice thermal conductivity,was obtained by Ta doping at the Ti site,leading to a peak figure of merit(ZT)of 0.7 at 973 K in Ti_(0.9)Ta_(0.1)-*** further alloying Hf at the Ti site,the lattice thermal conductivity was significantly reduced without deteriorating the power *** a result,a peak ZT of 0.9 at 973 K and an average ZT of 0.54 in the temperature range of 300-973 K were achieved in Ti_(0.6)Hf_(0.3)Ti_(0.1)*** work demonstrates that n-type TiCoSb-based halfHeuslers are promising thermoelectric materials.

关键词： Thermoelectric Half-Heusler N-type TiCoSb

Rapid detection of tyrosinase in shrimp by polyacid-based electrochemical sensors

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Tungsten 2023年第1期5卷 81-90页

作者： Xiao-Wen Chen Yu-Shan Chen Xiao-Mei Ding Li wang Jing Liu rui-fang wang College of Food and Biological Engineering Jimei UniversityXiamen 361021China School of Information Engineering Jimei UniversityXiamen 361021China

The increase through tyrosinase levels after shrimp death causes enzymatic browning,affecting the appearance and freshness of products,and it is essential to establish a simple and rapid method to detect tyrosinase in the aquatic product supply chain to control the market’s good *** this study,we used a constant potential deposition method to create a [(Polystyrene Sodium Sulfonate(PS S)/Polypyrrole(PPy))(P2Mo17Ni/PPy)5] polystyrene sodium sulfonate polymetallic oxide thin film electrodes that can realize the detection of tyrosinase(TYR) in shrimp *** method yielded a limit of detection(Signal-Noise ratio(S/N)=3) of 0.1028 U·mL^(-1) within the linear detection of 3.22-26.04 U·mL^(-1),and the recoveries of the samples ranged from 96.37% to 102.40%.The above data confirmed that the method showed some accuracy in the detection of TYR content in shrimps and provided a theoretical basis for the preparation of tyrosinase sensors for the application of polyoxometalates in aquatic products.

关键词： Polyoxometalates Electrochemical Tyrosinase Sensors

Synthesis of the C_(11-16)+C_(27) Segment of Epothilone A

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Chinese Chemical Letters 1998年第1期9卷 35-38页

作者： Zhi Yu LIU rui fang wang Yue Hai SHEN (Shanghai Institute of Organic Chemistry Chinese Academy of Sciences,354 Fenglin Lu. Shanghai 200032) Shanghai Inst. of Organic Chemistry Chinese Academy of Sciences Shanghai 200032 354 Fenglin Lu China

A chiral synthesis of the C11-16+C27 segment of epomilone A is described using inexpensive L-(-)-malic acid as staring materinal and using Sharpless asymmetric epoxidahon for introduction of the desired 12, 13 epoxide.

关键词： Epothilone A L-(-)-malic acid,asymmetric epoxidation

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数据意识下的条件不频繁行为挖掘与优化

计算机集成制造系统 2018年第7期24卷 1671-1679页

作者：曹蕊方贤文王丽丽方欢安徽理工大学数学与大数据学院安徽淮南232001

业务流程不频繁行为是指低频次事件轨迹记录的行为,从事件日志中挖掘条件不频繁行为是业务流程优化的关键点之一。已有的研究方法忽略低频次行为,也较少考虑数据流角度下的不频繁行为,本文考虑了事件间隐藏的数据依赖关系,提出基于数据... 详细信息

业务流程不频繁行为是指低频次事件轨迹记录的行为,从事件日志中挖掘条件不频繁行为是业务流程优化的关键点之一。已有的研究方法忽略低频次行为,也较少考虑数据流角度下的不频繁行为,本文考虑了事件间隐藏的数据依赖关系,提出基于数据意识的条件不频繁行为挖掘与优化。以模块间的通讯行为轮廓理论为基础,通过查询参考模型的可行迹对频次较低的轨迹添加属性值,计算交互特征间的数据依赖值并对不频繁行为进行分类处理,并根据处理后的优化日志构建模块网和特征网。模块网与特征网进行交互,挖掘出特征网与模块网的业务流程优化通讯模型。最后通过具体的实例分析验证了所提方法的有效性。

关键词：业务流程模型不频繁行为通讯行为轮廓隐藏变迁特征网数据意识

机械损伤和昆虫取食对紫茎泽兰与本地同属植物防御表达和补偿作用的差异

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Journal of Plant Ecology 2023年第1期16卷 257-267页

作者： rui-fang wang Zhi-Yong Liao Wei-Tao Li Chun-Hua Zhang Han-Bo Zhang Yu-Long Zheng Coffee college Puer UniversityPuerYunnan 665000China State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan Yunnan UniversityKunming 650091China CAS Key Laboratory of Tropical Forest Ecology Xishuangbanna Tropical Botanical GardenChinese Academy of SciencesMenglunYunnan 666303China

入侵地群落中的本地草食昆虫取食可以影响植物生长的适合度,从而有助于抵抗外来植物入侵。紫茎泽兰(Eupatorium adenophorum)是一种入侵性很强的外来物种,在中国南方许多省份已形成密集的单优群落。很多学者认为天敌逃逸是外来植物入侵... 详细信息

入侵地群落中的本地草食昆虫取食可以影响植物生长的适合度,从而有助于抵抗外来植物入侵。紫茎泽兰(Eupatorium adenophorum)是一种入侵性很强的外来物种,在中国南方许多省份已形成密集的单优群落。很多学者认为天敌逃逸是外来植物入侵的一个重要原因,但前期研究发现当地的几种广谱天敌能够取食紫茎泽兰。因此,本研究通过与本地同属植物异叶泽兰(***)比较,来评估是否低水平的防御表达和高的生物量补偿促进了紫茎泽兰的成功入侵。本文分别比较了在广谱天敌棉铃虫(Helicoverpa armigera)取食和机械损伤情况下紫茎泽兰和异叶泽兰早期防御信号茉莉酸(JA)和茉莉酸-异亮氨酸(JA-Ile)、叶绿素荧光、非靶代谢组学特征以及补偿生长等方面的差异。研究结果表明,机械损伤和模拟取食能立即启动入侵植物紫茎泽兰和本地同属植物异叶泽兰的天敌防御,诱导两种植物特异性的生理反馈。异叶泽兰对组织损伤更为敏感,相比于入侵植物紫茎泽兰产生了更丰富的防御化合物。棉铃虫取食比机械损伤对防御诱导的影响更大;与异叶泽兰相比,紫茎泽兰具有较高的补偿生长能力,可以抵消生物量损失和防御成本的投入,受到的影响相对较小。较低的代谢防御和较高的补偿生长可能有助于紫茎泽兰的入侵成功。

关键词：食草动物取食荧光代谢防御补偿紫茎泽兰

Shifts in chemical and microbiological properties belowground of invader Ageratina adenophora along an altitudinal gradient

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Journal of Plant Ecology 2022年第3期15卷 561-570页

作者： Wei-Tao Li Yu-Long Zheng rui-fang wang Zheng-Ying wang Yan-Mei Liu Xiong Shi Zhi-Yong Liao Yang-Ping Li Yu-Long Feng CAS Key Laboratory of Tropical Forest Ecology Xishuangbanna Tropical Botanical GardenChinese Academy of SciencesMengla 666303China Center of Conservation Biology Core Botanical GardensChinese Academy of SciencesMengla 666303China College of Life Sciences University of Chinese Academy of SciencesBeijing 100049China College of Agriculture and Forestry Puer UniversityPuer 665000China College of Bioscience and Biotechnology Liaoning Key Laboratory for Biological Invasions and Global ChangesShenyang Agricultural UniversityShenyang 110866China

Tropical mountain ecosystems are usually colonized by numerous invasive plant species and represent an ideal‘natural laboratory’to study the effects of altitude on plant *** aim of this study was to investigate the soil chemical and microbiological properties along an altitudinal gradient on a mountain colonized by the invader Ageratina *** soil of *** was collected over an altitudinal gradient(1400–2400 m)in Ailao Shan,*** determined soil organic carbon(C),nutrient contents,enzyme activities,bacterial community composition as well as C and nitrogen(N)contents of the plant *** stoichiometric indices were calculated to estimate the relative C,N or P limitations of the microbial *** was a significant effect of altitude on soil organic C in the rhizosphere,and a turning point in these measured variables was detected at an altitude of 2000 *** low elevations,the rapid growth of invasive plants depleted the deficient phosphorus(P)in tropical soils,leading to microbial P limitation;at high elevations,microbes invested more energy to obtain C from resistant litter,leading to microbial C *** beta diversity and soil pH contributed most to the altitudinal differences in ecoenzymatic stoichiometry,and Proteobacteria and Acidobacteria were the dominant bacterial phyla that determined the nutrient uptake status of *** results demonstrate how microbial nutrient acquisition belowground of *** along an altitudinal gradient,which could contribute to further knowledge about the effects of altitude on biological invasion.

关键词： Ageratina adenophora nutrients ecoenzymatic stoichiometry microbial metabolic limitation bacterial community

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高原低压环境小尺寸池火图像特征

燃烧科学与技术 2016年第4期22卷 324-328页

作者：商蕊方俊王静舞中国科学技术大学火灾科学国家重点实验室合肥230026

选用直径3-10,cm小尺寸圆形油盘,分别在低压（拉萨,0.067,MPa）与常压（合肥,0.100,MPa）条件下进行正庚烷池火燃烧实验.实验结果表明,在低压条件下,燃烧速率、火焰高度、振荡频率及振荡强度几项特征参量均比常压下大.在传导主控热反馈... 详细信息

选用直径3-10,cm小尺寸圆形油盘,分别在低压（拉萨,0.067,MPa）与常压（合肥,0.100,MPa）条件下进行正庚烷池火燃烧实验.实验结果表明,在低压条件下,燃烧速率、火焰高度、振荡频率及振荡强度几项特征参量均比常压下大.在传导主控热反馈阶段,拉萨、合肥两地的燃烧速率比为0.81,小于对流、辐射主控的大尺寸池火.根据振荡频率经验公式f=k D^-0.5对小尺寸池火油盘直径和振荡频率进行拟合,低压下拟合值k=1.845,常压下k=1.632.振荡强度在6,cm油盘时均出现拐点,呈先降后升的趋势.

关键词：图像特征低压小尺寸池火

Lightweight Al-Nb-Ti-V-Cr high entropy alloys with high hardness and enhanced mechanical properties via doping Co

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China Foundry 2025年

作者： fang-dong Xu De-zhi Chen rui-run Chen Bin Gan Jing-yue Yu National Key Laboratory for Precision Hot Processing of Metals Harbin Institute of Technology Suzhou Laboratory

To develop high-hardness and high-strength lightweight high entropy alloys （LHEAs）,a series of CoxAlNbTiVCr alloys were *** phase constitution,distribution,and crystal structure of the Laves phase in alloys can be altered by adjusting the composition of HEAs,which in turn influences their mechanical *** Nb Ti VCr （x=0,0.5,1,1.5,and 2,atomic ratio percentage） LHEAs were designed and prepared to characterize the microstructure and tailor the mechanical *** introduction of Co changes the microstructure of LHEAs from a single B2 structure to a mixture dendrite structure,which consists of B2 phase,C14 and C15 Laves *** the C14 and C15 Laves phases exhibit coupled *** parameters including mixing enthalpy (ΔHmix),valence electron concentration （VEC）,atomic radius size （δ）,mixing entropy （ΔS）,and electronegativity difference （Δχ） are used to predict the formation of B2 and Laves phase in *** the Co content increases from 0 to 1.5at.%,Laves phase volume fraction gradually increases,which leads to an enhancement in the compressive strength from 1,520.8 MPa to 1,844.4 ***1.5Al Nb Ti VCr alloy exhibits the maximum Vickers hardness of 699.4 *** improvement of mechanical properties mainly originates from solid solution strengthening and second phase strengthening.

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准确把握语文课程与教学论的性质及特征

教育教学论坛 2017年第13期 165-166页

作者：贾瑞芳王超陈云喀什大学教育科学学院新疆喀什844008

语文课程与教学论的性质与特征无论对于语文课程的教育还是对于语文课程的学习来说,都是一件极为重要的占据了内在核心的关键所在,因此要想提高语文课程教学的实践工作,就一定要从把握语文课程与教学论的性质与特征开始学习。本文从语... 详细信息

语文课程与教学论的性质与特征无论对于语文课程的教育还是对于语文课程的学习来说,都是一件极为重要的占据了内在核心的关键所在,因此要想提高语文课程教学的实践工作,就一定要从把握语文课程与教学论的性质与特征开始学习。本文从语文课程与教学论的性质出发,对于存在于当今学术界的一些概念上的问题进行了尝试,并且得出了一定的结论。在此基础上,进一步对语文课程与教学论中的特征进行研究,分别从理论和实践两个方面对其进行较为深入的探讨。希望通过本文的研究,能够为相关从业人员的语文教学工作提供具体可行的实践参考。

关键词：语文课程教学论性质特征